CN103764066A - Oral-hygiene device - Google Patents

Abstract

An oral-hygiene device is provided with a functional component (50) that acts on an oral cavity, an electric motor (41) that runs said functional component, a main case (11) that holds said electric motor, and a gripping case (70) that covers the outside surface of said main case. The main case (11) and the gripping case (70) include a relative-movement structure that allows the main case and the gripping case to move relative to each other. Said relative-movement structure functions as a power switch for the electric motor (41).

Description

Oral Hygiene Devices

technical field

The present invention relates to an oral hygiene device.

Background technique

Patent Document 1 discloses an electric toothbrush as an example of an oral hygiene device. This electric toothbrush has a main body case, a handle case, a toothbrush part, a cover, and a motor. The motor is used to apply vibrations to the toothbrush.

Patent Document 1: Japanese Unexamined Patent Publication No. 2009-294635

Contents of the invention

The problem to be solved by the invention

Since the above-mentioned electric toothbrush is formed for portable use, miniaturization is preferable. However, Patent Document 1 does not particularly consider miniaturization of the electric toothbrush. In addition, although the problem of the electric toothbrush was mentioned here, other oral hygiene devices also have the same problem.

In order to solve the above-mentioned problems, an object of the present invention is to provide an oral hygiene device having a structure that can contribute to downsizing.

solutions to problems

According to the first technical solution of the present invention, the oral hygiene device has: a functional part that acts on the oral cavity; a motor that operates the functional part; a main body case that holds the motor; and a handle case that Cover the outer surface of the above-mentioned main body case. The main body case and the grip case include a relative movement structure enabling relative movement between the main body case and the grip case. The above-mentioned relative operation structure functions as a power switch of the above-mentioned electric motor.

In this oral hygiene device, it is preferable that the relative movement structure is configured to allow relative rotation between the main body case and the grip case.

In this oral hygiene device, it is preferable that the relative movement structure is configured such that the relative rotational position between the main body case and the gripping case is between the first rotational position when the power to the motor is turned off and the position when the electric motor is turned on. Change between the 2nd rotational position of the power supply. In this case, it is preferable that the outer surface of the main body case and the outer surface of the grip case form an integral outer surface at least at the first rotational position.

In this oral hygiene device, preferably, the above-mentioned relative action structure includes: a first rotation structure that allows relative rotation between the above-mentioned main body casing and the above-mentioned grip casing, and functions as a power switch of the above-mentioned motor; A rotation structure that allows relative rotation between the main body case and the handle case, and enables the body case and the handle case to be coupled and separated from each other.

In this oral hygiene device, the first rotation structure and the second rotation structure allow the rotation of the gripping case in the coupling direction with respect to the main body case, and allow the gripping case to rotate in a direction relative to the main body case. Rotation of separation direction. The coupling direction and the separation direction are opposite to each other. In this case, it is preferable that the first rotation structure turns on the power supply of the motor when the grip housing rotates in the coupling direction, and turns off the power supply of the motor when the grip housing rotates in the separation direction.

In this oral hygiene device, it is preferable that the first operating force for switching on and off the power supply of the motor by using the first rotation structure is used for switching the main body case by using the second rotation structure. The second operation force in the coupled state and the separated state between the body and the grip housing is small.

In this oral hygiene device, it is preferable that the first operation amount for switching on and off the power supply of the motor by using the first rotation structure is greater than that for switching the main body case by using the second rotation structure. The second operation amount of the combined state and the separated state between the body and the above-mentioned grip housing is small.

In this oral hygiene device, it is preferable that the relative movement structure allows relative movement between the main body case and the grip case in the longitudinal direction of the oral hygiene device.

In this oral hygiene device, it is preferable that the main body case and the functional component include a part coupling structure capable of coupling and separating the main body case and the functional component from each other. In this case, it is preferable that the component coupling structure couples or separates the main body case and the functional component by allowing relative movement between the main body case and the functional component in the longitudinal direction of the oral hygiene device.

Preferably, the oral hygiene device further includes a grip-side electrode fixed to the bottom wall of the grip case so as to be in contact with the first electrode of the battery.

Preferably, the oral hygiene device further includes a conductive member provided in the main body case for connection to the second electrode of the battery. In this case, it is preferable that the relative movement structure moves the main body case and the grip case so that the first electrode position where the grip-side electrode does not contact the conductive member and the grip-side electrode contact each other. The position of the gripping side electrode is changed between the positions of the second electrode in contact with the conductive member.

In this oral hygiene device, preferably, the main body case includes: a battery holding portion for holding the battery; and a circuit board for supplying electric power of the battery to the motor. In this case, it is preferable that the said functional component, the said motor, the said circuit board, and the said battery holding part are arrange|positioned along the longitudinal direction of the said oral hygiene apparatus in this order. Further, it is preferable that the battery holding portion includes an opening facing the bottom wall of the handle case, and that the conductive member is fixed to the battery holding portion and has a length spanning from the circuit board to the opening.

In this oral hygiene device, it is preferable that the holding-side electrode includes a contact portion for connecting to the anode of the battery, and the holding case includes a restricting portion for restricting the connection between the anode contact portion and the battery. The cathodes are in contact with each other. In this case, the restriction portion is formed of a non-conductive material. In addition, it is preferable that a front end portion of the restricting portion is located closer to the battery holding portion side than the anode contact portion in the longitudinal direction of the grip case.

In this oral hygiene device, preferably, the functional component is a toothbrush component, and the motor is a motor having an output shaft with an eccentric weight. Moreover, it is preferable that this oral hygiene apparatus further has the cover which can be connected and detached with the said main body case or the said handle case.

The effect of the invention

The oral hygiene device of the present invention contributes to miniaturization.

Description of drawings

FIG. 1 is an oral hygiene device according to a first embodiment. FIG. 1( a ) is a perspective view showing a three-dimensional structure of the same device, and FIG. 1( b ) is a perspective view showing a three-dimensional structure in a partially cutaway state of a cover.

2 shows the electric toothbrush according to the first embodiment. FIG. 2(a) is a perspective view showing a three-dimensional structure, and FIG. stereogram.

Fig. 3 is an electric toothbrush related to the first embodiment. Fig. 3(a) is a perspective view showing a three-dimensional structure in a partially cutaway state of holding the case, and Fig. 3(b) is a partly cutaway view showing the casing and the decorative ring. A perspective view of the three-dimensional structure in the open state.

4 shows the electric toothbrush according to the first embodiment. FIG. 4( a ) is a perspective view showing the three-dimensional structure of the inner casing in a partially cutaway state, and FIG. 4( b ) is a perspective view showing the state in which the dry battery is omitted. Constructed stereogram.

Fig. 5 shows the oral hygiene device according to the first embodiment, Fig. 5(a) is a side view showing the left side structure, Fig. 5(b) is a front view showing the front structure, and Fig. 5(c) is a top view showing the structure The top view of the structure, Fig. 5(d) is a bottom view showing the structure of the bottom surface.

Fig. 6 is an electric toothbrush according to the first embodiment, Fig. 6(a) is a side view showing the left side structure, Fig. 6(b) is a front view showing the front structure, and Fig. 6(c) is a top view showing the structure The top view, Figure 6 (d) is a bottom view showing the structure of the bottom.

7 is a perspective view illustrating an exploded three-dimensional structure of the oral hygiene device according to the first embodiment.

FIG. 8 is a schematic diagram schematically showing the relationship between the respective components in the oral hygiene device according to the first embodiment.

Fig. 9 is an oral hygiene device related to the first embodiment, Fig. 9(a) is a cross-sectional view showing the cross-sectional structure of the D5A-D5A plane in Fig. 5 , and Fig. 9(b) is a cross-sectional view showing the D5B-D5B plane in Fig. 5 A cutaway view of a sectional configuration.

Fig. 10 is a cover of the oral hygiene device according to the first embodiment, Fig. 10(a) is a side view showing the left side structure, and Fig. 10(b) is a cross-sectional structure viewed from the D10A-D10A plane to the right Figure 10(c) is a sectional view showing the sectional structure seen from the D10A-D10A plane to the left, Figure 10(d) is a sectional view showing the sectional structure of the D10B-D10B plane, Figure 10(e) is a sectional view showing 10( f ) is a cross-sectional view showing the cross-sectional structure of the D10D-D10D plane.

Fig. 11 is a gripping case of the electric toothbrush according to the first embodiment, Fig. 11(a) is a front view showing the front structure, and Fig. 11(b) is a cross-sectional structure showing the D11A-D11A plane in Fig. 11(a) Figure 11(c) is a sectional view showing the sectional structure of the YZ plane, Figure 11(d) is a sectional view showing the sectional structure of the D11B-D11B plane, and Figure 11(e) is a sectional view showing the sectional structure of the D11C-D11C plane As a cross-sectional view, FIG. 11( f ) is a cross-sectional view showing a cross-sectional structure on a D11D-D11D plane.

Fig. 12 is a toothbrush attachment related to the electric toothbrush according to the first embodiment, Fig. 12(a) is a front view showing the front structure, Fig. 12(b) is a rear view showing the back structure, and Fig. 12(c) is a view showing the structure from D12A -A sectional view of the sectional structure viewed from the right on the D12A plane, Figure 12(d) is a sectional view showing the sectional structure of the D12B-D12B plane, Figure 12(e) is a sectional view showing the sectional structure of the D12C-D12C plane, Figure 12 (f) is a cross-sectional view showing a cross-sectional structure on a D12D-D12D plane.

Fig. 13 is a housing of the electric toothbrush according to the first embodiment, Fig. 13(a) is a side view showing the structure on the left side, Fig. 13(b) is a side view showing the structure on the right side, and Fig. 13(c) is A front view showing the front structure, and Fig. 13(d) is a rear view showing the back structure.

Fig. 14 is a housing of the electric toothbrush according to the first embodiment, Fig. 14(a) is a perspective view showing a three-dimensional structure viewed from the bottom side and the left side side, and Fig. 14(b) is a perspective view showing the top side and The right side is a perspective view of the three-dimensional structure of the observation point.

Fig. 15 is an inner case of the electric toothbrush according to the first embodiment, Fig. 15(a) is a side view showing the structure on the left side, Fig. 15(b) is a side view showing the structure on the right side, and Fig. 15(c) is a front view showing the front structure, and FIG. 15( d ) is a rear view showing the back structure.

Fig. 16 is an inner case of the electric toothbrush according to the first embodiment, Fig. 16(a) is a perspective view showing a three-dimensional structure viewed from the bottom side and the left side side, and Fig. 16(b) is a perspective view showing Fig. 16(a) ) is a perspective view of the inner case cut by the XZ plane, and FIG. 16( c ) is a perspective view showing the inner case in FIG. 16( a ) when cut by the YZ plane.

Fig. 17 is an electric toothbrush according to the first embodiment. Fig. 17(a) is a sectional view showing a state in which the cover and the toothbrush attachment in Fig. 9(a) are omitted, and Fig. Cutaway view of the state of the hood and toothbrush attachment.

Fig. 18 shows the oral hygiene device according to the first embodiment. Fig. 18(a) is a front view showing a part above the decorative ring, and is a front view showing a state in which the cover is cut along the YZ plane. Fig. 18(b) ) shows the back structure of the part above the decoration ring, and is a rear view showing a state in which the cover is cut along the YZ plane.

Fig. 19 shows the electric toothbrush according to the first embodiment. Fig. 19(a) is a side view showing the structure of the left side of the part above the decorative ring, and showing a state in which the toothbrush attachment is cut along the XZ plane. Fig. 19 (b) shows the back structure of the part above the decoration ring, and is a rear view showing a state in which the toothbrush attachment is cut along the XZ plane.

20 is an electric toothbrush according to the first embodiment. FIG. 20( a ) is a cross-sectional view showing a state where a part of the upper joint part enters the toothbrush attachment, and FIG. 20( b ) shows a part of the upper joint part from FIG. 20 ( The state in a) is a cross-sectional view of the state further entering the toothbrush attachment, and Fig. 20(c) is a cross-sectional view showing a state where a part of the upper joint part further enters the toothbrush attachment from the state in Fig. 20(b), Fig. 20 (d) is a cross-sectional view showing a state where the upper coupling portion and the toothbrush attachment are coupled to each other.

Fig. 21 is the electric toothbrush according to the first embodiment, Fig. 21(a) is a cross-sectional view showing the cross-sectional structure of the D20A-D20A plane in Fig. 20 , and Fig. 21(b) is a cross-sectional view showing the D20B-D20B plane in Fig. 20 Sectional view of the structure.

Fig. 22 is a toothbrush main body of the electric toothbrush according to the first embodiment, Fig. 22(a) is a side view showing the structure of the left side in a state where the holding case is cut along the XZ plane, and Fig. 22(b) is a side view showing A side view of the right side structure in a state where the grip housing is cut by the XZ plane.

Fig. 23 is a toothbrush main body of the electric toothbrush according to the first embodiment, Fig. 23(a) is a front view showing the front structure of the holding case in a state cut by the YZ plane, and Fig. 23(b) is a front view showing the holding case It is a rear view of the back structure in a state where the casing is cut in the YZ plane.

Fig. 24 is the toothbrush main body of the electric toothbrush according to the first embodiment. Fig. 24(a) corresponds to the cross-sectional structure of the D22A-D22A plane in Fig. 22 and Fig. The sectional view of the separated state of the relative rotation state, Fig. 24(b) corresponds to the sectional structure of the D22B-D22B plane in Fig. 22 and Fig. 23, and shows the separated state as the relative rotation state between the main body case and the grip case cutaway view.

Fig. 25 is the toothbrush main body of the electric toothbrush according to the first embodiment. Fig. 25(a) corresponds to the cross-sectional structure of the D22A-D22A plane in Fig. 22 and Fig. The cross-sectional view of the disconnected state of the relative rotation state, Fig. 25(b) is equivalent to the cross-sectional structure of the D22B-D22B plane in Fig. 22 and Fig. Cutaway view of the open state.

Fig. 26 is the toothbrush main body of the electric toothbrush according to the first embodiment. Fig. 26(a) corresponds to the cross-sectional structure of the D22A-D22A plane in Fig. 22 and Fig. The cross-sectional view of the on state of the relative rotation state, Fig. 26(b) is equivalent to the cross-sectional structure of the D22B-D22B plane in Fig. 22 and Fig. Cross-sectional view of the open state.

Fig. 27 is the anode assembly of the electric toothbrush according to the first embodiment, Fig. 27(a) is a plan view showing the top structure, Fig. 27(b) is a side view showing the left side structure, and Fig. 27(c) is a view showing Frontal view of the construction.

Fig. 28 is a gripping case of the electric toothbrush according to the first embodiment, Fig. 28(a) is a plan view showing the top surface structure, and Fig. 28(b) is a cross-sectional structure showing the D22C-D22C plane in Fig. 22 and Fig. 23 , and shows a sectional view of the state where the inner case and the dry battery are omitted, and FIG. 28(c) is a sectional view showing the sectional structure of the D22C-D22C plane in FIG. 22 and FIG. 23 , and shows a sectional view of the state where the dry battery is omitted.

Fig. 29 is a gripping case of the electric toothbrush according to the first embodiment, Fig. 29(a) is a perspective view showing the three-dimensional structure in Fig. 28(b), and Fig. 29(b) is a perspective view showing the three-dimensional structure in Fig. 28(c) Constructed stereogram.

30 is a gripping case of the electric toothbrush according to the first embodiment. FIG. 30( a ) is a perspective view showing a state in which a dry battery is inserted in FIG. 29( b ), and FIG. ) is a cross-sectional view of the cross-sectional structure seen from the right on the XZ plane.

Fig. 31 is an electric toothbrush related to the oral hygiene device of the second embodiment, Fig. 31(a) is a perspective view showing a three-dimensional structure in a partially cutaway state of the toothbrush attachment, and Fig. 31(b) is a perspective view showing a stain care attachment ( Japanese: ステインケアアタッチメント) is a perspective view of the state separated from the toothbrush main body.

Detailed ways

(first embodiment)

The terms of the portable oral hygiene device 1 are defined as follows.

(A) The Z direction represents the longitudinal direction of the device 1 .

(B) The Y direction represents the direction perpendicular to the Z direction when viewed from the front of the device 1 .

(C) The X direction represents a direction perpendicular to the Z direction when viewed from the side of the device 1 .

(D) The X-axis represents a coordinate axis that defines the X-direction.

(E) The Y axis represents a coordinate axis that defines the Y direction.

(F) The Z axis represents a coordinate axis that specifies the Z direction.

(G) The XY plane represents a plane defined by the X axis and the Y axis.

(H) The XZ plane represents a plane defined by the X axis and the Z axis.

(I) YZ plane means a plane defined by the Y axis and the Z axis.

(J) Front XA represents the direction from the back side toward the front side in the X direction.

(K) Rear XB represents the direction from the front side toward the back side in the X direction.

(L) Right YA indicates a direction from the left to the right in the Y direction viewed from the front.

(M) Left YB indicates the direction from the right to the left in the Y direction viewed from the front.

(N) Upper ZA indicates the direction from the bottom of the device 1 toward the top in the Z direction.

(O) Bottom ZB indicates a direction from the top of the device 1 toward the bottom in the Z direction.

(P) The radial direction represents the direction of the radial direction centered on the Z-axis on the XY plane.

The (Q) outward direction indicates a direction away from the Z-axis in the sagittal direction.

(R) The inner direction represents the direction approaching the Z-axis in the sagittal direction.

It should be noted that, in the sagittal direction, for a line segment formed by connecting two points between the central axis and other points, a circle formed by fixing the central axis and moving other points is used as a virtual When a circle is formed, the above-mentioned line segment is equivalent to the radius of the virtual circle.

FIG. 1( a ) shows the external appearance three-dimensional structure of the portable oral hygiene device 1 . The portable oral hygiene device 1 has: an electric toothbrush 2 for cleaning teeth; and a cover 80 for protecting the toothbrush attachment 50 of the electric toothbrush 2 . The cover 80 has an outer peripheral wall 81 covering the periphery of the toothbrush attachment 50 , and an upper side wall 82 for closing an upper opening of the outer peripheral wall 81 . The upper side wall portion 82 has two vent holes 82A having an arc shape. In addition, the portable oral hygiene device 1 is an example of an "oral hygiene device". In addition, the toothbrush attachment 50 is an example of a "functional part".

FIG. 1( b ) shows the portable oral hygiene device 1 in which the cover 80 is cut along the XZ plane in FIG. 1( a ). The electric toothbrush 2 has a toothbrush main body 10 in which various components are built in, and a toothbrush attachment 50 in which a plurality of hair bundles 51 are embedded.

FIG. 2( a ) shows the portable oral hygiene device 1 , that is, the electric toothbrush 2 , in which the cover 80 is omitted in FIG. 1( b ). The toothbrush main body 10 has: a main body housing 11 combined with the toothbrush attachment 50 ; a handle housing 70 for the user to hold; and a decorative ring 12 for improving the aesthetics of the electric toothbrush 2 .

The decoration ring 12 has a plurality of decoration parts 12A (see FIG. 5( a )). The single decorative portion 12A has a quadrangular pyramid shape. The decorative portions 12A are formed at equal intervals in the circumferential direction of the decorative ring 12 . The outer surface of the decoration ring 12 (hereinafter referred to as "decoration surface 12Z") has a shape in which two or more points are in contact with the installation surface of the portable oral hygiene device 1 . In addition, the decorative surface 12Z is painted with a paint for vapor deposition. The vapor-deposited paint forms a metallic luster film.

FIG. 2( b ) shows the electric toothbrush 2 in which the toothbrush attachment 50 is cut along the XZ plane in FIG. 2( a ). Part of the main body housing 11 is located in the space inside the toothbrush attachment 50 .

FIG. 3( a ) shows the electric toothbrush 2 in which the grip housing 70 is cut along the XZ plane in FIG. 2( b ). The main body case 11 has: an outer case 20 having a portion exposed to the outside; and an inner case 30 covered by the grip case 70 and the outer case 20 . The handle housing 70 has: an outer peripheral wall portion 71 covering the surroundings of the outer casing 20 and the inner casing 30; a lower side wall portion 72 for closing the lower opening of the outer peripheral wall portion 71; and a waterproof film (not shown in the figure). shown), which is pasted on the outer surface of the lower side wall portion 72.

FIG. 5( d ) shows the planar structure of the lower side wall portion 72 . The lower side wall portion 72 has: a middle concave portion 72A, which is recessed from the outer surface side of the grip housing 70 toward the inner space side; four grooves 72B, which are used to connect the middle concave portion 72A and the outer peripheral wall portion 71; and a vent hole 72C , which is used to make the inner space and the outer space of the handle housing 70 communicate with each other. It should be noted that the middle concave portion 72A, the four grooves 72B, and the ventilation holes 72C are all covered by the above-mentioned waterproof film.

FIG. 3( b ) shows the electric toothbrush 2 in which the casing 20 and the decorative ring 12 are cut along the XZ plane in FIG. 3( a ). Part of the inner case 30 is located in the space inside the outer case 20 . An elastic member 25 for sealing the gap between the main body case 11 and the handle case 70 is provided on the case 20 .

FIG. 4( a ) shows the electric toothbrush 2 in which the inner casing 30 is cut along the XZ plane in FIG. 3( b ). The inner case 30 holds: a vibration generating device 40 for vibrating the toothbrush attachment 50 ; and a battery holding portion 31 (refer to FIG. 7 ) for holding the dry battery 3 . The vibration generator 40 has a motor 41 , an eccentric weight 43 and a spacer 44 .

FIG. 4( b ) shows the electric toothbrush 2 in which the dry battery 3 is omitted from FIG. 4( a ). An anode fitting 64 for contacting the anode of the dry battery 3 is provided on the handle case 70 . The inner casing 30 is provided with: an energizing fitting 67, which is connected to the anode fitting 64; a cathode fitting 63, which is used to contact the cathode of the dry battery 3; and a circuit board 61, which is used to connect the energizing fitting 67 and the cathode fitting 63 to the motor. 41 are connected to each other. In addition, the anode metal fitting 64 is an example of a "grip-side electrode". In addition, the conduction fitting 67 is an example of a "conductive member".

As the material of the main body case 11, a material harder than the material of the handle 53 of the toothbrush attachment 50 is used. As a combination of materials of the main body case 11 and the handle 53, the following material combinations are mentioned, for example. As the material of the main body case 11, ABS resin containing glass fibers is used, and as the material of the handle 53, acetal resin is used. Alternatively, ABS resin is used as the material of the main body case 11 and polypropylene resin is used as the material of the handle 53 . In short, as long as it has the hardness required to maintain the respective functions of the main body case 11 and the handle 53, and the main body case 11 has a material combination with a hardness higher than that of the handle 53, it is not limited to the examples shown here. Other combinations are selected in combination.

It should be noted that the housing 20 in the main body housing 11 is preferably made of a material harder than the above-mentioned handle 53 for the following purpose, that is, even if the combination and separation with the toothbrush attachment 50 are repeated for a predetermined number of times, the maintain necessary functions. On the other hand, for the inner case 30 in the main body case 11, even if a material softer than the handle 53 is used, there is no decrease in durability accompanying the coupling and separation between the main body case 11 and the toothbrush attachment 50. Therefore, it is also possible to choose a material different from that of the housing 20 .

Referring to FIG. 5 , the structure of the appearance of the portable oral hygiene device 1 will be described. FIG. 5( a ) shows the left side structure of the portable oral hygiene device 1 . FIG. 5( b ) shows the front structure of the portable oral hygiene device 1 . FIG. 5( c ) shows the top surface structure of the portable oral hygiene device 1 . FIG. 5( d ) shows the bottom surface structure of the portable oral hygiene device 1 .

The outer surface 1Z of the portable oral hygiene device 1 has the outer surface of the cover 80 (hereinafter referred to as “cover outer surface 80Z”), the decorative surface 12Z, and the outer surface of the grip housing 70 (hereinafter referred to as “grip outer surface 70Z”). The cover outer surface 80Z and the grip outer surface 70Z have smoothly curved shapes.

As shown in FIG. 5( c ), the decorative surface 12Z extends over the entire circumference of the cover outer surface 80Z and is positioned in the outer direction from the cover outer surface 80Z. In addition, as shown in FIG. 5( d ), the decorative surface 12Z extends over the entire circumference of the grip outer surface 70Z and is positioned in the outer direction from the grip outer surface 70Z.

As shown in FIG. 5( a ), at positions corresponding to the front and back surfaces of the cover outer surface 80Z and the grip outer surface 70Z, the decorative portion 12A protrudes outward by a predetermined amount LA from the cover outer surface 80Z and the grip outer surface 70Z. . In addition, the predetermined protrusion amount LA corresponds to the distance between the part which protrudes most outwardly in the decoration part 12A, and the cover outer surface 80Z and the grip outer surface 70Z.

As shown in FIG. 5( b ), at positions corresponding to the right side and the left side of the cover outer surface 80Z and the grip outer surface 70Z, the decorative portion 12A protrudes from the cover outer surface 80Z and the grip outer surface 70Z in a predetermined direction outward. Protrusion amount LB. The predetermined protrusion amount LB is larger than the predetermined protrusion amount LA. In addition, predetermined protrusion amount LB is corresponded to the distance between the part which protrudes the most outward direction among the decoration parts 12A, and the cover outer surface 80Z and the grip outer surface 70Z.

The structure of the appearance of the electric toothbrush 2 will be described with reference to FIG. 6 . FIG. 6( a ) shows the structure of the left side of the electric toothbrush 2 . FIG. 6( b ) shows the front structure of the electric toothbrush 2 . FIG. 6( c ) shows the top surface structure of the electric toothbrush 2 . FIG. 6( d ) shows the bottom surface structure of the electric toothbrush 2 .

The outer surface 2Z of the electric toothbrush 2 has the outer surface of the toothbrush attachment 50 (hereinafter referred to as "toothbrush surface 50Z"), the outer surface 20Z of the case 20, the decorative surface 12Z, and the grip outer surface 70Z.

As shown in FIG. 6( c ), the decorative surface 12Z extends over the entire circumference of the toothbrush surface 50Z and the outer surface 20Z of the housing 20 and is located on the outer side of the toothbrush surface 50Z and the outer surface 20Z of the housing 20 .

As shown in FIG. 6( a ), at positions corresponding to the front and rear surfaces of the outer surface 20Z of the housing 20 , the decorative portion 12A protrudes outward by a predetermined amount LC from the outer surface 20Z of the housing 20 . It should be noted that the predetermined protrusion amount LC corresponds to the distance between the outer surface 20Z of the case 20 and the portion that protrudes most in the outer direction of the decorative portion 12A.

As shown in FIG. 6( b ), at positions corresponding to the right and left sides of the outer surface 20Z of the housing 20 , the decorative portion 12A protrudes outward by a predetermined amount LD from the outer surface 20Z of the housing 20 . The predetermined protrusion amount LD is larger than the predetermined protrusion amount LC. It should be noted that the predetermined protrusion amount LD corresponds to the distance between the outer surface 20Z of the housing 20 and the most outwardly protruding portion of the decorative portion 12A.

Referring to FIG. 7 and FIG. 8 , the connection structure between the various components will be described.

FIG. 7 shows a three-dimensional structure of the portable oral hygiene device 1 which can be configured separately. The user can disassemble the portable oral hygiene device 1 into the electric toothbrush 2 and the cover 80 . In addition, the user can disassemble the electric toothbrush 2 into the toothbrush main body 10 and the toothbrush attachment 50 . In addition, the user can disassemble the toothbrush main body 10 into the main body case 11 and the handle case 70 .

The main body case 11 has an outer case 20 and an inner case 30 . The inner case 30 has a battery holding portion 31 for housing the dry battery 3 . The battery holding portion 31 has an opening portion 31A for inserting the dry battery 3 into the space inside the battery holding portion 31 and for taking the dry battery 3 out of the space inside the battery holding portion 31 .

Fig. 8 shows a schematic connection structure between the respective components.

The portable oral hygiene device 1 has the following four combined structures.

(A) The electric toothbrush 2 and the cover 80 have a cover joint structure R (refer to FIG. 18 ) that enables the electric toothbrush 2 and the cover 80 to be coupled to and separated from each other. The cover coupling structure R has: two outer fitting portions RA formed on the outer surface 20Z of the casing 20; and two cover side fitting portions RB formed on the inner surface of the cover 80 (hereinafter referred to as “cover inner surface”). 80W").

(B) The toothbrush main body 10 and the toothbrush attachment 50 have a toothbrush coupling structure S (see FIG. 19 ) that enables the toothbrush main body 10 and the toothbrush attachment 50 to be coupled to and separated from each other. The toothbrush coupling structure S has one outer fitting portion SA formed on the outer surface 20Z of the housing 20 , and a toothbrush side fitting portion SB formed on the back wall of the toothbrush attachment 50 . In addition, the toothbrush joint structure S is an example of a "component joint structure".

(C) The outer shell 20 and the inner shell 30 have a body coupling configuration T capable of coupling and separating the outer shell 20 and the inner shell 30 from each other. The body joint structure T has: 2 inner fitting parts TA (refer to FIG. 15 ), which are formed on the outer surface 30Z of the inner shell 30; and 2 outer fitting parts TB (refer to FIGS. 13( a ) and 13 ( b ). )), which are formed on the outer surface 20Z of the housing 20.

(D) The main body case 11 and the grip case 70 have a grip joint structure U that enables the main body case 11 and the grip case 70 to be joined to and separated from each other. The holding joint structure U has: an upper holding joint structure UX (see FIG. )), which limit or allow the relative rotation of the handle housing 70 relative to the inner housing 30 . The upper grip coupling structure UX and the lower grip coupling structure UY cooperate to couple or separate the main body case 11 and the grip case 70 . It should be noted that the grip joint structure U is an example of the "relative motion structure". In addition, the upper side grip connection structure UX is an example of "the 2nd rotation structure". In addition, the lower side grip connection structure UY is an example of a "1st rotation structure".

The upper grip joint structure UX (see FIG. 24( a )) has: two grip side fitting parts UA formed on the inner surface of the grip housing 70 (hereinafter referred to as "grip inner surface 70W"); and two The outer fitting portion UB is formed on the outer surface 20Z of the housing 20 .

The lower side grip joint structure UY (see FIG. 24( b )) has: two grip side fitting portions UC formed on the grip inner surface 70W; and one inner fitting portion UD formed on the outer surface of the inner case 30 Surface 30Z.

It should be noted that the connection state of each connection structure R, S, T, U of the portable oral hygiene device 1 refers to when there is no force acting on the two components connected to each other by the respective connection structures, or when the two components are connected to each other. A state in which the relative movement of the two parts is restricted when the force acting on the parts in the direction of separating the two parts is less than a predetermined force.

FIG.9(a) has shown the cross-sectional structure of the D5A-D5A plane in FIG.5(c). FIG.9(b) has shown the cross-sectional structure of the D5B-D5B plane of FIG.5(c). FIG. 9( a ) and FIG. 9( b ) show various components located inside the main body casing 11 .

The upper engaging portion 21 is integrally located within the toothbrush attachment 50 . The motor 41 is located entirely within the upper coupling portion 21 . The outer surface of the intermediate joining portion 22 is opposed to the cover inner surface 80W. The upper part of the inner case 30 is located inside the outer case 20 . The lower part of the inner case 30 is located in the grip housing 70 .

The structure of the cover 80 will be described with reference to FIG. 10 . FIG. 10( a ) shows the front structure of the cover 80 . FIG.10(b) has shown the cross-sectional structure of the cover 80 seen from D10A-D10A plane in FIG.10(a) toward right direction YA. FIG.10(c) has shown the cross-sectional structure of the cover 80 seen from D10A-D10A plane of FIG.10(a) toward left direction YB. FIG. 10( d ) shows the cross-sectional structure of the cover 80 seen from the D10B-D10B plane in FIGS. 10( a ) to 10( c ) downward ZB. FIG.10(e) has shown the cross-sectional structure of the cover 80 seen from the D10C-D10C plane in FIG.10(a) - FIG.10(c) toward the downward ZB. FIG. 10( f ) shows the cross-sectional structure of the cover 80 seen from the D10D-D10D plane in FIGS. 10( a ) to 10( c ) downward ZB. It should be noted that each coordinate axis is omitted in FIG. 10 . The coordinates in the description of FIG. 10 are the same as those shown in FIGS. 1 to 9 .

The cover 80 has: two contact portions 83 that guide the movement of the toothbrush attachment 50 and the housing 20 by contacting the toothbrush attachment 50 and the housing 20 ; Each contact portion 83 is formed from the opening portion 84 of the cover 80 to the upper side wall portion 82 . One contact portion 83 and the other contact portion 83 have a positional relationship facing each other centering on the X-axis. Each cover-side fitting portion RB is adjacent to the contact portion 83 and formed near the opening portion 84 of the cover 80 . In addition, as shown in FIG. 10( d ), each cover-side fitting portion RB has a shape dented outward with respect to the cover inner surface 80W of the partitioned contact portion 83 .

The structure of the grip housing 70 will be described with reference to FIG. 11 . FIG. 11( a ) shows the front structure of the grip housing 70 . FIG.11(b) has shown the cross-sectional structure of the grip housing 70 seen from D11A-D11A plane in FIG.11(a) toward right direction YA. FIG. 11( c ) shows the cross-sectional structure of the grip housing 70 as viewed from the D11B-D11B plane in FIG. 11( a ) toward the rear ZB. FIG.11(d) has shown the cross-sectional structure of the grip housing 70 seen from the D11B-D11B plane in FIG.11(a)-FIG.11(c) toward ZB downward. FIG.11(e) has shown the cross-sectional structure of the grip housing 70 seen from the D11C-D11C plane in FIG.11(a)-FIG.11(c) toward the downward direction ZB. FIG. 11( f ) shows the cross-sectional structure of the grip housing 70 as viewed from the D11D-D11D plane in FIGS. 11( a ) to 11( c ) downward ZB. It should be noted that each coordinate axis is omitted in FIG. 11 . The coordinates in the description of FIG. 11 are the same as those shown in FIGS. 1 to 9 .

The grip housing 70 has: 2 grip side fitting parts UA, which constitute the upper grip joint structure UX; 2 grip side fitting parts UC, which constitute the lower side grip junction structure UY; and 2 longitudinal ribs 76, which It protrudes inwardly from the grip inner surface 70W. Further, based on this, the grip housing 70 has: a fixing portion 74 for fixing the anode fitting 64 (see FIG. 4 ); and an opening 73 for inserting the main body housing 11 into the internal space.

Each grip side fitting portion UA is located near the opening portion 73 on the grip inner surface 70W. One holding side fitting part UA and the other holding side fitting part UA are opposed to each other centering on the X axis.

Each grip side fitting portion UC is formed from the lower side wall portion 72 of the grip housing 70 to the middle portion in the Z direction. One holding-side fitting portion UC and the other holding-side fitting portion UC have an interval corresponding to the size of the inner fitting portion UD (see FIG. 15 ) of the inner case 30 in the circumferential direction.

Each of the vertical ribs 76 is formed at a position corresponding to the grip-side fitting portion UA in the direction around the Z-axis. In addition, each vertical rib 76 is formed from the lower side wall part 72 of the grip housing 70 to the vicinity of the lower side of the grip side fitting part UA in the Z direction.

The structure of the toothbrush attachment 50 will be described with reference to FIG. 12 . FIG. 12( a ) shows the front structure of the toothbrush attachment 50 . FIG. 12( b ) shows the back structure of the toothbrush attachment 50 . FIG.12(c) has shown the cross-sectional structure of the toothbrush attachment 50 seen from D12A-D12A plane in FIG.12(a) toward right direction YA. FIG.12(d) has shown the cross-sectional structure of the toothbrush attachment 50 seen from the D12B-D12B plane in FIG.12(a)-FIG.12(c) toward ZB downward. FIG.12(e) has shown the cross-sectional structure of the toothbrush attachment 50 seen from the D12C-D12C plane in FIG.12(a) - FIG.12(c) toward ZB downward. FIG.12(f) has shown the cross-sectional structure of the toothbrush attachment 50 seen from the D12D-D12D plane in FIG.12(a)-FIG.12(c) toward ZB downward. It should be noted that each coordinate axis is omitted in FIG. 12 . The coordinates in the description of FIG. 12 are the same as those shown in FIGS. 1 to 9 .

The toothbrush attachment 50 has: a plurality of tufts 51 for cleaning teeth; a brush head 52 in which each tuft 51 is embedded; and a handle 53 capable of being combined with the main body casing 11 . The brush head 52 and the handle 53 are formed as a single part from the same resin material.

The handle 53 has a toothbrush-side fitting portion SB constituting the toothbrush joint structure S, and a guide rib 54 that can be fitted into the guide groove 21A of the housing 20 (see FIG. 13( c )). In addition, on this basis, the brush handle 53 has a rotating coupling structure 55 for making the brush handle 53 and a housing of another configuration different from the housing 20 (hereinafter referred to as “another configuration housing”) interact with each other. Combine and separate. Another configuration casing has: another configuration fitting convex portion for joining and separating from the toothbrush side fitting portion SB; When the casings are joined together, it is used to provide a user with an operational feeling. It should be noted that the illustration of another structural shell is omitted.

The toothbrush-side fitting portion SB has a through hole formed in the rear wall portion of the handle 53 . The guide rib 54 is formed from the opening portion 59 of the toothbrush attachment 50 to the middle portion in the Z direction.

The rotation coupling structure 55 has: a concave fitting portion 56 into which the operation feeling imparting part of another structure is fitted; an operation feeling imparting part 57 for imparting a reaction force to the operation feeling imparting part of the other structure; and a rotation guide groove 58 It is used to guide the other structural operation feeling imparting portion to the operating feeling imparting portion 57 .

The concave fitting portion 56 has a restriction front surface 56A for coming into contact with another configuration operation feeling imparting portion fitted into the concave fitting portion 56 . The operation feeling imparting part 57 has: a guide slope 57A for guiding the operation feeling imparting part of another structure to the concave fitting part 56 ; The operational feeling imparting portion is in contact; and the intermediate curved surface 57C for connecting the guide slope 57A and the restriction elevation 57B. The rotation guide groove 58 has a shape capable of guiding another configuration fitting protrusion from the opening portion 59 to the toothbrush side fitting portion SB.

When the user combines the toothbrush attachment 50 with another structural housing, the user inserts the other structural fitting protrusion into the rotation guide groove 58 . Next, by rotating the toothbrush attachment 50 around the Z axis with respect to the other structure case, another structure fitting convex part is fitted in the toothbrush side fitting part SB. At this time, another configuration operation feeling imparting portion moves from the rotation guide groove 58 to the concave fitting portion 56 via the guide slope 57A and the intermediate curved surface 57C. In another configuration, the operational feeling imparting portion gives the user a reaction force from the operational feeling imparting portion 57 as an operational feeling when the user passes over the guide slope 57A and the intermediate curved surface 57C.

The other structural fitting convex part fitted in the toothbrush side fitting part SB contacts the back wall part of the handle 53, and the movement with respect to the handle 53 is restricted. Thus, the toothbrush attachment 50 is integrated into another construction housing.

The user can apply the required force to the handle 53 to cause the other structural fitting protrusion to climb up from the toothbrush side fitting portion SB to the inner surface of the back wall portion of the handle 53, thereby enabling the The toothbrush attachment 50 is separate from the other construction housing.

The structure of the housing 20 will be described with reference to FIG. 13 . FIG. 13( a ) shows the structure of the left side of the case 20 . FIG. 13( b ) shows the right side structure of the casing 20 . FIG. 13( c ) shows the front structure of the casing 20 . FIG. 13( d ) shows the rear structure of the casing 20 .

The housing 20 has: an upper coupling portion 21 for coupling with the toothbrush attachment 50; a lower coupling portion 23 for coupling with the handle housing 70; and an intermediate coupling portion 22 for coupling the upper coupling portion 21 and the lower The sections 23 are connected to each other. The upper joint portion 21, the middle joint portion 22, and the lower joint portion 23 are formed of the same resin material as a single piece.

The upper joint part 21 has: one outer fitting part SA which comprises the toothbrush joint structure S;

The middle coupling part 22 has: two outer fitting parts RA constituting the cover coupling structure R; In addition, on this basis, the intermediate joint portion 22 has: a fitting groove 22B into which the elastic member 25 (refer to FIG. 3( a )) is fitted; relatively. Each fixing portion 22A and each outer fitting portion RA has a shape protruding from the outer surface of the intermediate coupling portion 22 in the sagittal direction.

The lower coupling part 23 has: two outer fitting parts UB constituting the upper grip joint structure UX; and two outer fitting parts TB for forming the main body joint structure T. FIG. Each outer fitting portion TB has a hole that penetrates part of the wall portion of the lower coupling portion 23 .

Each outer fitting portion UB (refer to FIG. 24( a )) has: a first rotation groove UB1 for limiting the movement range of the grip side fitting portion UA of the upper grip coupling structure UX; a second rotation groove UB2 for It is for guiding the grip side fitting part UA to the 1st rotation groove UB1, and the boundary rib UB3 is located in the boundary between the 1st rotation groove UB1 and the 2nd rotation groove UB2. When the holding side fitting part UA moves from the second rotating groove UB2 to the first rotating groove UB1, and when the holding side fitting part UA moves from the first rotating groove UB1 to the second rotating groove UB2, the boundary rib UB3 has The housing 70 imparts the function of reaction force.

As shown in FIG. 13( a ), one outer fitting portion UB and one outer fitting portion TB are located on the right side in the outer surface of the lower coupling portion 23 . As shown in FIG. 13( b ), the other outside fitting portion UB and the other outside fitting portion TB are located on the left side in the outer surface of the lower coupling portion 23 .

Referring to FIG. 14( a ) and FIG. 14( b ), the shape of the outer fitting portion SA will be described.

The outer fitting portion SA has: 2 upright wall portions SA1 protruding rearward XB from the outer surface of the upper joint portion 21; The rear XB stands out. The middle concave portion SA4 forms a concave portion with respect to each standing wall portion SA1.

Each upright wall portion SA1 has: a coupling side contact surface SA2, which provides an operational feeling to the user when coupled with the toothbrush attachment 50; feel. The bonding side contact surface SA2 has a shape standing vertically rearward XB with respect to the outer surface of the upper bonding portion 21 . The separation-side contact surface SA3 has a shape protruding toward the rear XB as it goes from the lower ZB to the upper ZA with respect to the outer surface of the upper coupling portion 21 .

Referring to FIGS. 15( a ) to 15 ( d ), the structure of the inner case 30 will be described.

The inner case 30 has: a battery holding portion 31 for holding the dry battery 3 (see FIG. 7 ); a board holding portion 32 for holding the circuit board 61 (see FIG. 9 ); and a device holding portion 33 for holding the dry battery 3 (see FIG. 7 ); Vibration generating device 40.

The battery holding portion 31 has: two inner fitting portions TA constituting the main body coupling structure T; an opening portion 31A for inserting and taking out the dry battery 3 ; and a clamping portion 31B for clamping the dry battery 3 . In addition, on this basis, the battery holding portion 31 has: a cutout portion 31C for exposing part of the dry battery 3 accommodated inside the battery holding portion 31; a cathode insertion portion 31D for a cathode fitting 63 (refer to FIG. 16 ) embedding; and an anode embedding portion 31E for embedding the energization fitting 67 (refer to FIG. 16 ). Further, on this basis, the battery holding portion 31 has: a base portion 31F as a wall portion having high strength; and three supporting portions 31G connecting the inside fitting portion TA to the base portion 31F.

Each inner fitting portion TA is supported by the base portion 31F by the three support portions 31G. In addition, each inner fitting portion TA protrudes outward from the outer surface 30Z of the inner case 30 at a portion surrounded by the three support portions 31G.

The anode embedding portion 31E is formed on the outer surface of the battery holding portion 31 from one end to the other end. In addition, the anode embedding portion 31E has a plurality of protrusions for fixing the energization fitting 67 by thermal caulking.

Each pinching portion 31B is inclined from the outer direction to the inner direction as going from the connection portion between it and the wall portion of the battery holding portion 31 toward the front end portion. Therefore, when the dry battery 3 is inserted into the battery holding portion 31 , each pinching portion 31B expands from the inner direction toward the outer direction by contact with the dry battery 3 .

The substrate holding portion 32 has: a connecting portion 32A for connecting part of the wall portion of the substrate holding portion 32 and a portion of the wall portion of the device holding portion 33 to each other; and two hooking portions 32B for hooking Circuit board 61 (see FIG. 16 ).

Electronic components will be described with reference to FIGS. 16( a ) to 16 ( c ).

The motor 41 and the spacer 44 are fixed to the device holding portion 33 with an adhesive tape. The eccentric weight 43 is fixed to the output shaft 42 of the motor 41 (see FIG. 17 ).

Electric toothbrush 2 has electronic component group 60 including a plurality of electronic components. The electronic parts group 60 has: a circuit substrate 61 for supplying electric current of the dry battery 3 to the motor 41; a current fuse 62 mounted on the circuit substrate 61; a cathode fitting 63 for contacting the cathode of the dry battery 3; and an anode The fitting 64 (see FIG. 4 ) is used to contact the anode of the dry battery 3 . In addition, on this basis, the electronic component group 60 has: a power supply fitting 67, which is connected to the end of the anode fitting 64 on the side close to the circuit substrate 61; and the anode wire 66, which is used to connect the end of the electric fitting 67 near the circuit substrate 61 side to the anode terminal on the output side of the circuit substrate 61. The terminals are connected to each other.

A current fuse 62 is located between one end of the anode lead 66 and the other end of the anode lead 66 . The cathode fitting 63 is fixed to the substrate holding portion 32 of the inner case 30 . The end portion of the cathode metal fitting 63 on the circuit board 61 side is connected to the cathode terminal on the input side of the circuit board 61 . The energization fitting 67 is fixed to the anode insertion portion 31E of the battery holding portion 31 . The cathode terminal on the output side of the circuit board 61 is connected to the cathode terminal of the motor 41 . The anode terminal on the output side of the circuit board 61 is connected to the anode terminal of the motor 41 .

Referring to Fig. 17, a circuit formed of electronic components will be described. FIG. 17( a ) shows a state in which the cover 80 and the toothbrush attachment 50 are omitted in FIG. 9( a ). FIG. 17( b ) shows a state in which the cover 80 and the toothbrush attachment 50 are omitted in FIG. 9( b ).

When the dry battery 3 is inserted into the battery holding portion 31, and the anode fitting 64 and the energization fitting 67 are in contact with each other, the electronic component group 60 forms a closed circuit by electrically connecting in the following order: the anode of the dry battery 3, the anode fitting 64, the circuit board 61 , anode wire 66 , motor 41 , cathode wire 65 , circuit board 61 , cathode fitting 63 and the cathode of dry battery 3 .

When the current flowing through the closed circuit is larger than the rated current, the current fuse 62 breaks the closed circuit formed by the electronic component group 60 . When the anode fitting 64 is moved to a position where it does not come into contact with the energization fitting 67 due to the rotation of the holding case 70 relative to the main body case 11 , the closed circuit of the electronic component group 60 is broken. In addition, when the anode metal fitting 64 is moved to a position where it comes into contact with the power supply metal fitting 67 due to the rotation of the grip case 70 relative to the main body case 11 , the closed circuit of the electronic component group 60 is turned on.

The energization fitting 67 has: a straight portion 67A fitted into the anode insertion portion 31E (see FIG. 15( c )); and a bent portion 67B formed by performing a bending process. Furthermore, the energization fitting 67 is fixed to the anode embedding portion 31E by heat caulking. The bent portion 67B is located at the opening portion of the inner case 30 . The outer surface of the bent portion 67B has a curved shape. The curved outer surface of the bent portion 67B can suppress the occurrence of abrasion of the mutual parts that is caused by relative movement with the anode metal fitting 64 during contact.

Referring to Fig. 18, the operation of the cover coupling structure R will be described.

FIG. 18( a ) is a front structure in a state where the electric toothbrush 2 and the cover 80 are combined, and shows a partial front structure of the portable oral hygiene device 1 in which the cover 80 is cut along the YZ plane. FIG. 18( b ) shows the rear structure of the state where the electric toothbrush 2 and the cover 80 are combined, and shows a partial rear structure of the portable oral hygiene device 1 in which the cover 80 is cut along the YZ plane.

In the state where the electric toothbrush 2 and the cover 80 are connected to each other, when a force greater than the first separation force acts in the Z direction, the cover connection structure R releases the connection between the electric toothbrush 2 and the cover 80 . On the other hand, in the state where the electric toothbrush 2 and the cover 80 are separated from each other, and the positional relationship between the outer fitting portion RA of the housing 20 and the cover side fitting portion RB of the cover 80 is a state corresponding to each other, in the direction Z When a force greater than the first coupling force acts in the direction, the cover coupling structure R couples the electric toothbrush 2 and the cover 80 to each other.

19 to 21, the action of the toothbrush coupling structure S will be described.

FIG. 19( a ) shows the left side structure of the toothbrush main body 10 and the toothbrush attachment 50 in a combined state, showing the partial left side structure of the portable oral hygiene device 1 when the toothbrush attachment 50 is cut along the XZ plane. FIG. 19( b ) shows the back structure of the toothbrush body 10 and the toothbrush attachment 50 in a combined state, showing the partial back structure of the portable oral hygiene device 1 when the toothbrush attachment 50 is cut along the XZ plane.

The toothbrush coupling structure S releases the coupling between the electric toothbrush 2 and the cover 80 when a force greater than the second separation force acts in the Z direction in the coupled state of the toothbrush main body 10 and the toothbrush attachment 50 . On the other hand, in the state where the electric toothbrush 2 and the cover 80 are separated from each other, and the positional relationship between the outer side fitting portion SA of the housing 20 and the toothbrush side fitting portion SB of the toothbrush attachment 50 is a state corresponding to each other, When a force greater than the second coupling force acts in the Z direction, the toothbrush coupling structure S couples the electric toothbrush 2 and the cover 80 together.

Referring to Fig. 20 and Fig. 21, the detailed relationship of the toothbrush joint structure S will be described.

FIG. 20 shows the process of combining the toothbrush main body 10 and the toothbrush attachment 50 with each other using the toothbrush combination structure S with respect to the toothbrush combination structure S and its surrounding sectional structure. FIG. 21( a ) shows the cross-sectional structure of the main body case 11 and the toothbrush attachment 50 on the D20A-D20A plane in FIG. 20( c ). FIG. 21( b ) shows the cross-sectional structure of the main body case 11 and the toothbrush attachment 50 on the D20B-D20B plane in FIG. 20( d ).

As shown in FIG. 20( a ), by moving the toothbrush attachment 50 downward ZB relative to the upper coupling portion 21 , the tip end portion of the upper coupling portion 21 is inserted into the opening portion 59 . At this time, the guide rib 54 enters into the guide groove 21A.

As shown in FIG. 20( b ), by moving the toothbrush attachment 50 further downward ZB relative to the upper coupling portion 21 , the end surface of the opening portion 59 comes into contact with the outer fitting portion SA of the upper coupling portion 21 .

As shown in FIG. 20( c), when a force greater than the second coupling force acts downward ZB, the back wall portion of the toothbrush attachment 50 is in contact with the coupling side contact surface SA2 while pressing against each upright wall portion SA1 (see FIG. 14 ). (a)) Move up. At this time, each standing wall portion SA1 applies a reaction force to the rear wall portion. The reaction force acting on the rear wall portion gives the user an operational feeling accompanying the operation of the toothbrush attachment 50 . As shown in FIG. 21( a ), when the rear wall portion moves on each upright wall portion SA1 , the operation feeling imparting portion 57 moves on the middle concave portion SA4 (see FIG. 14( a )).

As shown in Figure 20 (d), when the whole of the toothbrush side fitting part SB moves to a position corresponding to the outer fitting part SA of the upper joint part 21, the toothbrush side fitting part SB and the outer fitting part SA fit each other. Thus, the toothbrush attachment 50 is combined with the toothbrush body 10 .

As shown in FIG.21(b), each standing wall part SA1 of the outer side fitting part SA is in contact with the wall surface of the toothbrush side fitting part SB, respectively. The contact between each upstanding wall portion SA1 and the wall surface of the toothbrush-side fitting portion SB restricts the rotation of the toothbrush attachment 50 relative to the upper coupling portion 21 . Further, the guide rib 54 is fitted into the guide groove 21A of the upper coupling portion 21 when the outside fitting portion SA and the toothbrush side fitting portion SB are fitted to each other.

Referring to FIG. 22( a ) and FIG. 22( b ), the detailed relationship of the main body coupling structure T will be described.

When a force greater than the third separation force acts in the Z direction of the electric toothbrush 2 in a state where the outer shell 20 and the inner shell 30 are coupled, the main body coupling structure T releases the coupling between the outer shell 20 and the inner shell 30 . On the other hand, in the state where the outer shell 20 and the inner shell 30 are separated from each other, and the positional relationship between the inner fitting portion TA and the outer fitting portion TB is a state corresponding to each other, in the Z direction of the electric toothbrush 2 When the force is greater than the third coupling force, the main body coupling structure T couples the outer shell 20 and the inner shell 30 to each other.

Referring to Fig. 22 to Fig. 26, the detailed relationship of the grip joint structure U will be described.

FIG. 22( a ) shows the left side structure of the toothbrush main body 10 in a state where the grip housing 70 is cut along the XZ plane. FIG. 22( b ) shows the right side structure of the toothbrush main body 10 in a state where the grip housing 70 is cut along the XZ plane. FIG. 23( a ) shows the front structure of the toothbrush main body 10 in a state where the grip housing 70 is cut along the YZ plane. FIG. 23( b ) shows the rear surface structure of the toothbrush main body 10 in a state where the grip housing 70 is cut along the YZ plane.

In the state where the main body case 11 and the grip case 70 are combined with each other, when a force greater than the fourth separation force acts in a direction around the central axis of the electric toothbrush 2, the grip joint structure U releases the main body case 11 and the grip case. 70 combinations between. On the other hand, in the state where the main body housing 11 and the grip housing 70 are separated from each other, and the positional relationship between the grip side fitting portion UA and the outer fitting portion UB is a state corresponding to each other and the grip side fitting portion When the positional relationship between UC and the inner fitting portion UD corresponds to each other, when a force greater than the fourth coupling force acts in a direction around the central axis of the electric toothbrush 2, the main body case 11 and The grip housings 70 are combined with each other.

The grip coupling configuration U allows relative rotation of the grip housing 70 with respect to the main body housing 11 in a state where the main body housing 11 and the grip housing 70 are coupled to each other. The relative rotation state of the handle housing 70 relative to the main body housing 11 is divided into the following three states: the "separated state" shown in Fig. 24(a) and Fig. 24(b), the "separated state" shown in Fig. The "off state" shown in b) and the "on state" shown in Fig. 26(a) and Fig. 26(b).

When the grip case 70 and the main body case 11 are in a separated state, the grip case 70 can be separated from the main body case 11 . When the holding case 70 and the main body case 11 are disconnected, the electric toothbrush 2 is powered off. When the grip case 70 and the main body case 11 are connected, the power supply of the electric toothbrush 2 is turned on. In the present embodiment, in the coupled state where the grip housing 70 is coupled to the main body housing 11 , the on state and the off state can be switched.

When the handle case 70 is rotated counterclockwise in FIG. 24( a ) relative to the main body case 11 from the separated state, the handle case 70 and the main body case 11 are switched from the separated state to the combined state. Hereinafter, this rotation direction is referred to as "coupling direction". In this embodiment, when the grip housing 70 is rotated from the separated state to the combined direction, the grip housing 70 and the main body case 11 are initially turned to the disconnected state ( FIG. 25( a ) and FIG. 25( b )). The combined state transition of , followed by the combined state transition corresponding to the on state (Figure 26(a) and Figure 26(b)). That is, the grip housing 70 is rotated in the joining direction relative to the main body housing 11 in the order of the separation position, the power-off position, and the power-on position. On the other hand, when the handle case 70 is rotated clockwise in FIG. 25( a ) relative to the main body case 11 from the disconnected state, the handle case 70 and the main body case 11 are switched from the combined state to the separated state. . Hereinafter, this rotation direction is referred to as "separation direction". It should be noted that the relative rotational position of the grip housing 70 with respect to the main body housing 11 in the disconnected state corresponds to the "first rotational position". In addition, the relative rotational position of the grip housing 70 with respect to the main body housing 11 in the ON state corresponds to a "second rotational position".

The separated state will be described in detail with reference to FIGS. 22 to 24 .

FIG. 24( a ) shows the cross-sectional structure of the D22A-D22A plane in FIG. 22( a ) and FIG. 22( b ) in a separated state between the main body case 11 and the handle case 70 . FIG. 24( b ) shows the cross-sectional structure of the D22B-D22B plane in FIG. 22( a ) and FIG. 22( b ) in a separated state between the main body case 11 and the grip case 70 .

As shown in FIG. 24( a ), when the operating force for rotating the grip housing 70 from the separated state to the coupling direction is smaller than the fourth coupling force, the range of movement around the Z-axis of the grip side fitting portion UA is limited to the housing 20 . inside the 1st rotation tank UB1. The first rotation groove UB1 corresponds to the range from the rotation restricting wall portion UB4 of the casing 20 to the boundary rib UB3.

The rotation restricting wall portion UB4 restricts the rotation of the grip housing 70 in the direction of separation from the housing 20 when it comes into contact with the grip side fitting portion UA. The boundary rib UB3 restricts the rotation of the grip housing 70 in the coupling direction with respect to the housing 20 when it comes into contact with the grip side fitting portion UA.

In addition, as shown in FIG. 24( b ), when the operating force for rotating the grip housing 70 from the separated state to the coupling direction is smaller than the fourth coupling force, the range of movement around the Z-axis of the grip side fitting portion UA is fitted inside. Combined with some UD restrictions. The inner fitting portion UD restricts the rotation of the grip housing 70 in the coupling direction with respect to the inner case 30 when it comes into contact with the grip side fitting portion UC.

As shown in FIG. 22( a ) and FIG. 22( b ), the first rotation groove UB1 opens downward ZB along the outer surface 30Z of the inner casing 30 . Therefore, when the grip housing 70 moves downward ZB relative to the main body housing 11 with the grip side fitting portion UA located in the first rotation groove UB1 , the grip side fitting portion UA is disengaged from the first rotation groove UB1 . In addition, when the holding side fitting part UA is aligned with the first rotation groove UB1 in the Z direction, when the holding case 70 moves upward ZA relative to the main body case 11, the holding side fitting part UA enters the first rotating groove UB1. Rotate tank UB1.

Therefore, in the separated state in FIG. 24( a ) and FIG. 24( b ), in order to disengage the grip side fitting portion UA from the first rotation groove UB1 , the grip housing 70 is directed downward relative to the main body case 11 . ZB is moved so that the main body case 11 can be detached from the opening portion 73 of the grip case 70 .

Transition from the separated state to the disconnected state will be described.

In the separated state, when the grip housing 70 is rotated in the coupling direction with respect to the main body case 11 , as shown in FIG. 24( a ), the grip side fitting portion UA comes into contact with the boundary rib UB3 .

In the separated state shown in Fig. 24(a) and Fig. 24(b), when the grip housing 70 is rotated in the joining direction relative to the main body housing 11 by an operating force greater than the fourth joining force, the grip side inserts The engaging portion UA passes over the boundary rib UB3 along the bonding direction, and the grip side fitting portion UC passes over the inside fitting portion UD along the bonding direction. Thereby, the relative rotation state of the grip housing 70 with respect to the main body housing 11 is switched to the disconnected state as shown in FIGS. 25( a ) and 25 ( b ).

The fourth coupling force is equivalent to the operation force necessary to pass the grip-side fitting portion UA over the boundary rib UB3 along the bonding direction and the operating force necessary to pass the grip-side fitting portion UC over the inner fitting portion UD along the bonding direction. together force. It should be noted that the fourth coupling force is an example of the "second operating force".

As shown in FIG. 23( a ) and FIG. 23( b ), in the separated state, the anode fitting 64 and the current-carrying fitting 67 are in a non-contact state. The tip portion of the anode metal fitting 64 gradually approaches the power supply metal fitting 67 as the holding case 70 is rotated in the direction of coupling with the main body case 11 . In addition, when the rotation state of the grip housing 70 relative to the main body housing 11 is switched from the separated state to the disconnected state, the anode fitting 64 and the current-carrying fitting 67 are also in a non-contact state.

Referring to Fig. 25, the off state will be described in detail.

FIG. 25( a ) shows a cross-sectional structure of a D22A-D22A plane in FIGS. 22( a ) and 22( b ) in a disconnected state between the main body case 11 and the handle case 70 . FIG. 25( b ) shows the cross-sectional structure of the D22B-D22B plane in FIG. 22( a ) and FIG. 22( b ) in the disconnected state between the main body case 11 and the handle case 70 .

As shown in FIG. 25(b), when the operating force for rotating the grip housing 70 from the disconnected state to the connected direction is smaller than the ON operating force, the inner fitting portion UD is held between the two gripping side fitting portions UC. . Thereby, the rotation of the grip housing 70 in the coupling direction with respect to the inner housing 30 (main body housing 11 ) is restricted, and the disconnected state is maintained.

In addition, as shown in FIG. 25( b ), when the operating force to rotate the grip housing 70 from the disconnected state to the separation direction is smaller than the fourth separation force, the inner fitting portion UD is held at the two gripping side fitting portions UC. between. Accordingly, the rotation of the grip housing 70 in the direction of separating from the inner housing 30 (main body housing 11 ) is restricted, and the disconnected state is maintained.

In addition, as shown in FIG. 25(a), when the operating force for rotating the grip housing 70 from the disconnected state to the separation direction is smaller than the fourth separation force, the grip side fitting portion UA is bounded by the boundary rib of the outer fitting portion UB. Supported by UB3. Accordingly, the rotation of the grip housing 70 in the direction of separating from the housing 20 (main body housing 11 ) is restricted, and the disconnected state is maintained.

Therefore, in the OFF state, when the operating force for rotating the grip housing 70 in the coupling direction is smaller than the ON operating force, and when the operating force for rotating the grip housing 70 in the separation direction is smaller than the fourth separation force, the grip The housing 70 does not rotate relative to the main body housing 11 .

The transition from the OFF state to the ON state will be described.

In the off state shown in Fig. 25(a) and Fig. 25(b), when the grip housing 70 is rotated in the coupling direction relative to the main body case 11 by an operating force greater than the on operation force, the grip side The fitting portion UC goes over the inner fitting portion UD along the joining direction. Thereby, the relative rotation state of the grip housing 70 with respect to the main body housing 11 is switched to the ON state as shown in FIG. 26( a ) and FIG. 26( b ).

The ON operation force is equivalent to the operation force required to make one holding-side fitting part UC pass over the inside fitting part UD in the coupling direction. Therefore, the connection operation force is smaller than the fourth connecting force necessary to change the rotation state between the main body housing 11 and the grip housing 70 from the separated state to the disconnected state. It should be noted that the connection operation force is equivalent to "1st operating force".

As shown in FIG. 23 , in the off state, the anode fitting 64 and the energization fitting 67 are in a non-contact state. The tip portion of the anode metal fitting 64 gradually approaches the power supply metal fitting 67 as the holding case 70 is rotated in the direction of coupling with the main body case 11 . Furthermore, when the rotational state of the grip housing 70 relative to the main body housing 11 is switched from the OFF state to the ON state, the anode fitting 64 comes into contact with the current-carrying fitting 67 . Thus, a closed circuit of the electronic component group 60 is formed (see FIG. 16 ). Accordingly, the motor 41 rotates. It should be noted that, in the OFF state, the rotational position of the anode metal fitting 64 relative to the energization metal fitting 67 corresponds to the "first electrode position". In addition, in the ON state, the rotational position of the anode metal fitting 64 relative to the energization metal fitting 67 corresponds to the "second electrode position".

The transition from the disconnected state to the separated state will be described.

25 (a) and FIG. 25 (b) in the disconnected state, when using an operating force greater than the fourth separation force to make the grip housing 70 rotate in the direction of separation relative to the main body case 11, the grip side The fitting portion UA goes over the interface rib UB3 in the separation direction, and the grip-side fitting portion UC goes over the inside fitting portion UD of the inner case 30 in the separation direction. Thereby, the relative rotation state of the grip housing 70 with respect to the main body housing 11 is switched to the separated state as shown in FIG. 24( a ) and FIG. 24( b ).

The fourth separating force is equivalent to the operating force required to move the grip-side fitting portion UA over the boundary rib UB3 in the separating direction and the operating force required for one grip-side fitting portion UC to pass over the inner fitting portion UD in the separating direction. combined force. In this embodiment, as shown in FIG. 24( b ), the inner fitting portion UD has a first slope that abuts on one holding side fitting portion UC when the holding case 70 is rotated in the coupling direction; And a 2nd slope which abuts on one grip side fitting part UC when the grip housing 70 rotates to a separation direction. The second slope has a larger inclination angle than the first slope. Therefore, when the grip housing 70 is rotated in the separation direction, the rotational force necessary to make one grip side fitting portion UC pass over the inner fitting portion UD is greater than that required to make one grip side fitting portion UC be fitted when the grip housing 70 is rotated in the coupling direction. The rotational force required for the portion UC to get over the inner fitting portion UD is large. Therefore, the fourth separation force is greater than the fourth connection force. However, the fourth separating force and the fourth connecting force may be made equal. In addition, the 4th separation force is an example of a "2nd operation force".

The main body case 11 and the grip case 70 are relatively rotated by a first predetermined rotation amount in a direction around the Z-axis during transition from the separated state to the disconnected state or vice versa. In addition, the main body case 11 and the handle case 70 are relatively rotated by the second predetermined rotation in the direction around the Z axis during the transition from the off state to the on state or from the on state to the off state. quantity. The second predetermined amount of rotation is smaller than the first predetermined amount of rotation. It should be noted that the first predetermined rotation amount corresponds to the "second operation amount". In addition, the second predetermined rotation amount corresponds to the "first operation amount".

The ON state will be described in detail with reference to FIG. 26( a ) and FIG. 26( b ).

FIG. 26( a ) shows the cross-sectional structure of the D22A-D22A plane in FIG. 22( a ) and FIG. 22( b ) in the connected state between the main body case 11 and the handle case 70 . FIG. 26( b ) shows the cross-sectional structure of the D22B-D22B plane in FIG. 22( a ) and FIG. 22( b ) in the connected state between the main body case 11 and the handle case 70 .

As shown in FIG. 26( a ), when the grip side fitting portion UA is supported by the rotation restricting wall portion UB5 , the rotation of the grip housing 70 in the separation direction with respect to the housing 20 is restricted.

As shown in FIG. 26( b ), when the operating force for rotating the grip housing 70 from the ON state to the separation direction is smaller than the OFF operating force, the grip side fitting portion UC is supported by the inner fitting portion UD. Accordingly, the rotation of the grip housing 70 in the separation direction relative to the inner housing 30 is restricted.

Therefore, in the ON state, the grip housing 70 does not rotate relative to the main body case 11 when the operating force for rotating the grip housing 70 in the separation direction is smaller than the OFF operating force. At this time, the rotation restricting wall part UB5 of the housing 20 prevents the grip side fitting part UA from rotating in the coupling direction. Therefore, in the ON state, the grip housing 70 does not rotate in the coupling direction with respect to the main body housing 11 .

The transition from the ON state to the OFF state will be described.

26(a) and 26(b), when the handle case 70 is rotated in the separation direction with respect to the main body case 11 by an operating force greater than the OFF operation force, the handle side The fitting portion UC goes over the inner fitting portion UD along the separation direction. Thereby, the relative rotation state of the grip housing 70 with respect to the main body housing 11 is switched to the disconnected state as shown in FIG. 25( a ) and FIG. 25( b ).

The disconnection operation force corresponds to the operation force required to make one holding-side fitting portion UC pass over the inside fitting portion UD in the separation direction. As described above, when the grip housing 70 is rotated in the separation direction, the rotational force required to make one grip side fitting portion UC get over the inner fitting portion UD is greater than that required to make one grip side fit when the grip housing 70 is rotated in the coupling direction. The rotational force required for the portion UC to get over the inner fitting portion UD is large. Therefore, the OFF operation force is larger than the ON operation force required to change the rotational state between the main body housing 11 and the grip housing 70 from the OFF state to the ON state. However, the OFF operation force and the ON operation force may be set to be equally large. It should be noted that the opening operation force is an example of the "first operation force".

The anode fitting 64 (see FIG. 23 ) is in contact with the energization fitting 67 in the ON state. Furthermore, when the rotation state between the main body case 11 and the grip case 70 is switched from the on state to the off state, the anode metal fitting 64 is separated from the energization metal fitting 67 . As a result, the closed circuit of the electronic component group 60 is broken (see FIG. 16 ). Therefore, the rotation of the motor 41 stops.

Referring to Fig. 27, the shape of the anode fitting 64 will be described. FIG. 27( a ) shows the top surface configuration of the anode fitting 64 . FIG. 27( b ) shows the structure of the left side of the anode fitting 64 . FIG. 27( c ) shows the front structure of the anode fitting 64 .

The anode fitting 64 has: an anode contact portion 64A for contacting the anode of the dry battery 3 (see FIG. 30 ); two fitting contact portions 64B for contacting the energization fitting 67; Fitted into the fixed portion 74 of the grip housing 70 . The energization fitting 67 (see FIG. 29 ) is in contact with one of the two fitting contact portions 64B.

Each fitting portion 64C has a hook portion 64D hooked on the inner surface of the grip housing 70 . The tip portion of each hook portion 64D has a shape that becomes thinner toward the tip. Each accessory contact portion 64B is inclined from the bottom ZB toward the top ZA from the connection portion with the fitting portion 64C toward the tip end portion. The tip end portion of each fitting contact portion 64B is bent toward the power-carrying fitting 67 side.

The anode contact portion 64A, each fitting portion 64C, each hook portion 64D, and each fitting contact portion 64B are formed from one continuous metal plate. 64 A of anode contact parts are located in the upper ZA position than each fitting part 64C and each hook part 64D. The tip portion of each fitting contact portion 64B is located above the anode contact portion 64A ZA when it is not in contact with the inner case 30 or the energization fitting 67 (see FIG. 29 ).

The electrode structure of the grip case 70 will be described in detail with reference to FIGS. 28 to 30 .

FIG. 28( a ) shows a planar structure of the holding case 70 in a state where the anode fitting 64 is detached. FIG. 28( b ) shows a state in which the inner case 30 is omitted from the cross-sectional structure of the D22C-D22C plane in FIG. 22( a ). FIG. 28( c ) shows the cross-sectional structure of the D22C-D22C plane in FIG. 22( a ).

The fitting portion 64C of the anode metal fitting 64 is fitted into the fixing portion 74 of the grip case 70 . Each hook portion 64D is pressed against the inner surface of the grip housing 70 . The fitting between the fixing portion 74 and the fitting portion 64C, and the contact between the inner surface of the holding case 70 and the hooking portion 64D contribute to the rotation and rotation of the anode fitting 64 relative to the lower side wall portion 72 of the holding case 70 . Movement is restricted. It should be noted that, on the inner surface of the grip housing 70 , the boundary portion from the inner surface of the outer peripheral wall portion 71 to the inner surface of the lower side wall portion 72 and the vicinity thereof have a smooth curved shape. Each hook portion 64D is pressed against this curved portion.

As shown in Figure 28(b) and Figure 29(a), when the inner shell 30 is not inserted into the handle housing 70, the top end of each fitting contact part 64B of the anode fitting 64 is located at a lower position than the anode contact part 64A and the limiting part. 75 near the position of ZA above.

As shown in FIG. 28(c) and FIG. 29(b), the wall portion of the opening portion 31A of the inner case 30 contacts the top end portion of each accessory contact portion 64B to push down each accessory contact portion 64B downward ZB. When the rotational position of the grip housing 70 relative to the main body housing 11 is the disconnected position, the fitting contact portion 64B does not come into contact with the bent portion 67B of the power supply fitting 67 .

As shown in FIG. 30( a ), when the inner case 30 is inserted into the holding case 70 , the holding case 70 makes the anode contact portion 64A and the anode of the dry battery 3 contact each other. 3.

As shown in FIG. 30( b ), the restricting portion 75 of the lower side wall portion 72 faces the dry battery 3 via a gap. The end surface of the opening 31A of the inner case 30 is positioned below ZB from the anode plane 3A of the dry battery 3 . The bent portion 67B of the conduction fitting 67 is located below ZB of the end surface of the opening portion 24 . In addition, the bent portion 67B of the electric fitting 67 is located in the outer direction than the inner surface of the opening portion 31A. That is, the bent portion 67B is located at a position where it is difficult to contact the dry battery 3 .

Referring to Fig. 9, the operation of the electric toothbrush 2 will be described.

When the user vibrates the brush head 52 when using the electric toothbrush 2 , the user rotates the grip housing 70 in the coupling direction with respect to the main body housing 11 . That is, the relative rotation state between the main body case 11 and the handle case 70 is changed from the off state to the on state. The anode fitting 64 is in contact with the energization fitting 67 as it changes from the off state to the on state. Thus, a closed circuit electrically connecting the dry battery 3 and the motor 41 is formed.

The motor 41 rotates the output shaft 42 and the eccentric weight 43 by the electric current supplied from the dry battery 3 . The vibration caused by the rotation of the eccentric weight 43 is transmitted to the toothbrush attachment 50 via the main body case 11 . Therefore, the brush head 52 and each hair bundle 51 vibrate along with the rotation of the motor 41 .

The portable oral hygiene device 1 of this embodiment exhibits the following effects.

(1) The main body case 11 and the grip case 70 of the electric toothbrush 2 have a grip joint structure U that allows relative movement between the main body case 11 and the grip case 70 . The grip connection structure U functions as a power switch of the motor 41 . According to this structure, the power switch part of the electric motor 41 can be omitted. Therefore, it contributes to the miniaturization of the electric toothbrush 2 .

(2) The toothbrush main body 10 of the electric toothbrush 2 does not have the power switch part of the motor 41 at the middle joint portion 22 of the casing 20 . With this structure, the dimension in the longitudinal direction of the electric toothbrush 2 is reduced compared with the structure in which the power switch part is provided in the middle joint part 22 of the housing 20 .

(3) The grip coupling structure U has a structure that allows relative rotation between the main body case 11 and the grip case 70 . According to this configuration, when the grip housing 70 is operated to selectively turn on and off the power supply of the electric toothbrush 2 , the dimension in the longitudinal direction of the electric toothbrush 2 does not change. Therefore, the user can really feel the miniaturization when using the electric toothbrush 2 .

(4) As a structure capable of allowing relative rotation of the main body case 11 and the grip case 70 , the grip coupling structure U has: a lower grip coupling structure UY that functions as a power switch for the motor 41 ; and an upper grip coupling structure UX , which enables the main body case 11 and the handle case 70 to be combined and separated from each other. According to this structure, the relative rotation between the main body case 11 and the handle case 70 has two functions, and contributes to the miniaturization of the electric toothbrush 2 compared with a structure in which different movements have the above-mentioned functions respectively.

(5) In the lower holding and connecting structure UY, the ON operation force and the OFF operating force for changing the ON and OFF of the power supply of the motor 41 are more than that for separating the main body in the upper holding and connecting structure UX. The fourth separation force between the case 11 and the grip case 70 is small. With this configuration, the possibility of the grip housing 70 being separated from the main body housing 11 during an operation for changing the power supply of the motor 41 on and off is reduced.

(6) The upper-side grip-joint structure UX couples the main body case 11 and the grip case 70 to each other when it is rotated in the joining direction. The upper grip joint structure UX separates the main body case 11 and the grip case 70 from each other when it is rotated in the separation direction. When the lower grip coupling structure UY is rotated in the coupling direction, the power supply of the motor 41 is turned on. When the lower grip connection structure UY rotates in the separation direction, the power supply of the motor 41 is turned off. According to this configuration, it is possible to suppress the occurrence of separation of the grip housing 70 from the main body housing 11 accompanying the operation for turning the power supply of the motor 41 from off to on. Therefore, when the brush head 52 is vibrated when the electric toothbrush 2 is used, the possibility of interruption of tooth brushing due to the rotation of the holding case 70 from the main body case 11 in the separation direction is reduced.

(7) The lower grip connection structure UY has a second predetermined operation amount which is an operation amount for changing ON and OFF of the power supply of the motor 41 . The upper grip connection structure UX has a first predetermined operation amount for changing the connection and separation between the main body case 11 and the grip case 70 . The second predetermined operation amount is smaller than the first predetermined operation amount. With this configuration, the possibility that the grip housing 70 is separated from the main body housing 11 accompanying the operation for turning on and off the power supply of the motor 41 is reduced.

(8) The main body case 11 and the toothbrush attachment 50 have a toothbrush coupling structure S capable of coupling and detaching the main body case 11 and the toothbrush attachment 50 from each other. The toothbrush joint structure S utilizes the relative movement between the main body case 11 and the toothbrush attachment 50 in the longitudinal direction to couple or separate the main body case 11 and the toothbrush attachment 50 . With this structure, it is possible to easily combine the main body case 11 and the toothbrush attachment 50 by moving the functional parts in the Z direction relative to the main body case, compared with a joint structure in which the functional parts and the main body case are combined with each other. , and a part of the main body case is inserted into the functional part, and then the functional part is rotated relative to the main body case to combine the functional part and the main body case with each other. In addition, here, as an example of the coupling structure demonstrated as a comparative example, the rotation coupling structure 55 for coupling and detaching the other structure case and the toothbrush attachment 50 is mentioned.

(9) The anode fitting 64 is fixed to the lower side wall portion 72 of the holding case 70 . According to this configuration, the position of the anode metal fitting 64 relative to the power supply metal fitting 67 can be changed as the grip housing 70 is rotated relative to the main body housing 11 .

(10) The main body case 11 has a power supply fitting 67 for connecting to the anode of the dry battery 3 . The anode fitting 64 has a first electrode position not in contact with the energization fitting 67 and a second electrode position in contact with the energization fitting 67 . In the grip joint structure U, the first electrode position and the second electrode position of the anode fitting 64 are changed by relative rotation between the main body case 11 and the grip case 70 . According to this configuration, the power supply of the motor 41 is selected to be turned off or on by the manipulation of the grip housing 70 held during tooth brushing, so that the user can intuitively operate the power supply of the motor 41 .

(11) The grip case 70 has a restricting portion 75 for restricting the anode contact portion 64A and the cathode of the dry battery 3 to come into contact with each other. The limiting portion 75 is formed of a non-conductive material. The tip portion of the restricting portion 75 is located closer to the battery holding portion 31 side than the anode contact portion 64A in the longitudinal direction of the grip case 70 . With this configuration, when the cathode of dry battery 3 is accommodated in battery holding portion 31 facing anode fitting 64 , the cathode of dry battery 3 is in contact with regulation portion 75 and faces anode contact portion 64A through a gap. That is, the cathode of the dry battery 3 is not in contact with the anode contact portion 64A. Therefore, the occurrence of short circuit can be suppressed.

(12) The electric toothbrush 2 has a portable structure because it is smaller in size compared with a fixed electric toothbrush. Therefore, for users who are accustomed to using a fixed electric toothbrush, since the area of the electric toothbrush 2 in contact with the hand is smaller than that of a fixed electric toothbrush, it may be difficult to hold the housing when brushing teeth. On the other hand, the electric toothbrush 2 has the decoration ring 12 protruding outward from the grip outer surface 70Z. The decoration ring 12 prevents the grip housing 70 from sliding relative to the user's hand by being caught in the user's hand. Therefore, a user who is accustomed to using a fixed electric toothbrush can reduce the above-mentioned sense of discomfort by using the decorative ring 12 as an anti-slip portion to hold the grip housing 70 .

(13) The grip case of the electric toothbrush of Patent Document 1 has a smoothly curved shape in order to improve the appearance. Therefore, there is a possibility that the grip housing slips relative to the user's hand when brushing teeth. On the other hand, since the electric toothbrush 2 has the decoration ring 12, the operability at the time of using the electric toothbrush of patent document 1 is improved.

(14) The energization fitting 67 is fixed to the outer surface of the battery holding portion 31 of the inner case 30 . With this structure, the possibility of contact between the energization fitting 67 and the cathode fitting 63 is reduced. Furthermore, compared with the structure in which the energization fitting 67 is fixed to the inner surface of the battery holding portion 31 , the work of the energization fitting 67 relative to the battery holding portion 31 becomes easy.

(15) The battery holding portion 31 has a cutout portion 31C for insertion and removal of the dry battery 3 . With this structure, when the dry battery 3 is taken out from the battery holding portion 31 , the outer peripheral surface of the dry battery 3 exposed at the cutout portion 31C can be grasped. Therefore, it becomes easy to remove the dry battery 3 from the battery holding portion 31 .

(16) The battery holding portion 31 has the clamping portion 31B inclined from the outer direction to the inner direction. With this structure, when the dry battery 3 is inserted into the battery holding portion 31, the dry battery 3 expands the holding portions 31B to the outside direction, so that the dry battery 3 is held relative to the battery holding portion 31 by the restoring force of the holding portions 31B. The location is not easy to change.

(17) The main body case 11 has the circuit board 61 connected to the cathode metal fitting 63 and the anode metal fitting 64 . The circuit board 61 has a current fuse 62 . With this structure, it is possible to easily form a conduction path from the dry battery 3 to the electric motor 41 . In addition, when the dry battery 3 is short-circuited, it is possible to suppress a large current from flowing in the dry battery 3 .

(18) The energization fitting 67 has a straight portion 67A and a bent portion 67B. With this structure, when the bent portion 67B comes into contact with the current-carrying fitting 67 as the grip housing 70 is rotated relative to the main body case 11, the connection with the current-carrying fitting 67 is more effective than the structure in which the edge portion of the fitting is in contact with the power-conducting fitting 67. The anode fitting 64 is not easily cut when the fitting 67 contacts.

(19) The main body case 11 has the elastic member 25 at a position above ZA from the joining portion between the outer case 20 and the inner case 30 . That is, the elastic member 25 seals the gap between the main body case 11 and the grip case 70 by coming into contact with the grip inner surface 70W near the opening portion 73 of the grip case 70 . According to this structure, it is possible to suppress foreign matter from entering the inside of the main body case 11 . In addition, a single elastic member 25 achieves the effect of suppressing entry of foreign matter, and the body shape of the toothbrush body 10 can be reduced compared to a configuration in which a plurality of elastic members achieve the same effect.

(20) The main body coupling structure T has the inner fitting portion TA of the inner shell 30 and the outer fitting portion TB of the outer shell 20 . The inner fitting portion TA is connected to the base portion 31F of the inner case 30 via three support portions 31G. With this structure, the strength of the inside fitting portion TA is improved compared to a structure in which the inside fitting portion TA is not connected to the base portion 31F via the support portion 31G.

(21) The toothbrush coupling structure S has the outer side fitting portion SA of the upper coupling portion 21 and the toothbrush side fitting portion SB of the toothbrush attachment 50 . The outer fitting portion SA has a structure that restricts rotation of the toothbrush attachment 50 relative to the upper coupling portion 21 . According to this structure, the toothbrush attachment 50 can be suppressed from rotating with respect to the upper coupling part 21 in a state where the toothbrush attachment 50 is attached to the upper coupling part 21 .

(22) The upright wall portion SA1 of the outer fitting portion SA has a function of giving the attachment 50 an operability and a function of restricting the rotation of the attachment 50 . According to this configuration, the toothbrush joint structure S can be downsized compared with a configuration in which these two functions are provided by separate components.

(Second embodiment)

The main difference between the portable oral hygiene device 1 of the present embodiment shown in FIG. 31 and the portable oral hygiene device 1 of the first embodiment shown in FIG. 1 is the following differences. That is, the electric toothbrush 2 of the portable oral hygiene device 1 according to the first embodiment has the toothbrush attachment 50 as one functional part. On the other hand, the electric toothbrush 2 of the portable oral hygiene device 1 according to the present embodiment has the toothbrush attachment 50 and the tooth stain care attachment 100 as two functional components. Hereinafter, differences from the electric toothbrush 2 of the first embodiment will be described in detail, and the same reference numerals will be assigned to the same structures as those of the first embodiment, and a part or all of the description will be omitted.

FIG. 31( a ) shows the electric toothbrush 2 in which the toothbrush attachment 50 is cut along the XZ plane in FIG. 2( a ). The toothbrush body 10 has a stain care attachment 100 . The stain care attachment 100 is coupled to the upper coupling portion 26 of the housing 20 . Additionally, the stain care attachment 100 is located in the space within the toothbrush attachment 50 .

FIG. 31( b ) shows the electric toothbrush 2 in a state where the toothbrush attachment 50 is omitted in FIG. 31( a ) and the stain care attachment 100 is separated from the upper coupling portion 26 . The upper joining portion 26 has: a concave fitting portion 26B into which the stain care attachment 100 fits; and a tip support portion 26C for supporting the stain care attachment 100 in the Z direction. In addition, on this basis, the upper joint part 26 has: a guide groove 26A, which is the same shape as the guide groove 21A of the upper joint part 21 of the first embodiment; The gap between the inner surface and the outer surface of the upper joining portion 26 is sealed. In addition, the other structures of the upper joint part 26 are the same as the structure of the upper joint part 21 of 1st Embodiment.

The tooth stain care attachment 100 has: a male fitting part 101 which can be fitted into the female fitting part 26B; and a care part 102 for grinding teeth. The care part 102 has an action surface 103 which inclines from the rear XB to the front XA as it goes from the upper ZA toward the lower ZB. As the material of the stain care attachment 100, silicone rubber with abrasives is used.

The main body case 11 has a central axis perpendicular to the XY plane. The stain care attachment 100 has a central axis perpendicular to the XY plane. In the XZ plane of the electric toothbrush 2 , the central axis of the tooth stain care attachment 100 is located at the rear XB with respect to the central axis of the main body casing 11 . In addition, the central axis of the stain care attachment 100 and the central axis of the main body housing 11 are parallel to each other.

(Effect of implementation)

The portable oral hygiene device 1 of the present embodiment has the following effects in addition to the effects (1) to (22) achieved by the portable oral hygiene device 1 of the first embodiment.

(23) The electric toothbrush 2 has the toothbrush attachment 50 as a first functional component and the stain care attachment 100 as a second functional component. According to this structure, one electric toothbrush 2 can perform two kinds of cleaning operations for the oral cavity.

(24) The stain care attachment 100 is coupled with the upper coupling portion 26 of the main body case 11 . Therefore, compared with the structure in which the stain care attachment 100 cannot be combined with the upper coupling part 26, management of the same attachment 100 becomes easy.

(Other implementations)

The oral hygiene device of the present invention includes embodiments other than the first embodiment and the second embodiment. Hereinafter, modifications of the first embodiment and the second embodiment will be shown as other embodiments of the oral hygiene device. It should be noted that the following modification examples can be used in combination with each other.

Electric toothbrush 2 according to the second embodiment has a structure in which housing 20 and stain care attachment 100 are coupled and separated from each other. However, the relationship between the housing 20 and the stain care attachment 100 is not limited to that illustrated in the second embodiment. For example, electric toothbrush 2 according to a modified example has a structure in which stain care attachment 100 is fixed to housing 20 . That is, the stain care attachment 100 cannot be separated from the housing 20 .

The electric toothbrush 2 according to the second embodiment has a center axis that eccentrically eccentrically engages the convex fitting portion 101 of the stain care attachment 100 with respect to the upper coupling portion 26 of the housing 20 . However, the relationship between the upper coupling portion 26 and the convex fitting portion 101 is not limited to that illustrated in the second embodiment. For example, in the electric toothbrush 2 of the modified example, the upper coupling portion 26 and the convex fitting portion 101 are coaxial.

The electric toothbrush 2 of the second embodiment has a stain care attachment 100 as a second functional component. However, the form of the second functional component is not limited to what was exemplified in the second embodiment. For example, the electric toothbrush 2 of the modified example has a manicure attachment or a gum massage attachment as a second functional component.

Electric toothbrush 2 according to the second embodiment has toothbrush attachment 50 as a first functional component, and has stain care attachment 100 as a second functional component. However, the forms of the first functional component and the second functional component are not limited to those illustrated in the second embodiment. For example, an electric toothbrush 2 according to a modified example has a first functional component and a second functional component combined in the following (A) to (F).

(A) An electric toothbrush 2 according to a modified example has a toothbrush attachment 50 as a first functional component. In addition, the electric toothbrush 2 of the modified example has a toothbrush attachment, a gum massage attachment, a point sharpening brush (Japanese: ポイント木きブラシ), an attachment for manicure, a toothpaste tube (Japanese: 歯物剤チューブ), and a block for vibration adjustment (Japanese: : Hammer) any one of the functional parts as the second functional part.

(B) The electric toothbrush 2 of the modified example has a gum massaging attachment as a first functional component. In addition, the electric toothbrush 2 of the modified example has, as a functional part, any one of a toothbrush attachment, a gum massage attachment, a point sharpening brush, an attachment for manicure, a toothpaste tube, a block for vibration adjustment, an interdental brush, and an attachment for tooth stain care. 2nd functional part.

(C) The electric toothbrush 2 of the modified example has a point polishing brush as a first functional component. In addition, the electric toothbrush 2 of the modified example has any one of the functional parts of the main point sharpening brush, toothbrush attachment, gum massage attachment, manicure attachment, toothpaste tube, vibration adjustment block, interdental brush, and tooth stain care attachment. 2nd functional part.

(D) The electric toothbrush 2 of the modified example has an attachment for manicure as a first functional component. In addition, the electric toothbrush 2 according to the modified example has any one of a toothbrush attachment, a gum massage attachment, a point sharpening brush, a toothpaste tube, a block for vibration adjustment, an interdental brush, and a tooth stain care attachment as a second functional member.

(E) The electric toothbrush 2 of the modified example has a stain care attachment as a first functional component. In addition, the electric toothbrush 2 of the modified example has a stain care attachment, a toothbrush attachment, a gum massage attachment, a point sharpening brush, an attachment for manicure, a toothpaste tube, a block for vibration adjustment, an interdental brush, and a paste tube (Japanese : any one of the functional components in ペースト㉤チューブ) is used as the second functional component.

(F) An electric toothbrush 2 according to a modified example includes an interdental brush as a first functional component. In addition, the electric toothbrush 2 of the modified example has any one of an interdental brush, a toothbrush attachment, a gum massage attachment, a point sharpening brush, a manicure attachment, a toothpaste tube, and a vibration adjustment block as a second functional member.

In the modification examples (A) to (F) above, the electric toothbrush 2 having the block for vibration adjustment has a structure in which the toothbrush main body 10 and the block are coupled and separated from each other. In this configuration, when the block is coupled to the toothbrush main body 10, the vibration that the vibration generating device 40 imparts to the first functional component or the second functional component is reduced. On the other hand, when the block is separated from the toothbrush body 10, the vibration generated by the vibration generating device 40 to the first functional component or the second functional component becomes larger than when the block is coupled. That is, the block can adjust the magnitude of the vibration that the vibration generating device 40 imparts to the first functional component or the second functional component.

The electric toothbrush 2 of the second embodiment has a stain care attachment 100 made of silicone rubber. However, the structure of the stain care attachment 100 is not limited to what was illustrated in the second embodiment. For example, the electric toothbrush 2 of the modified example has a knurled metal material as a stain care attachment.

The electric toothbrushes 2 according to the first embodiment and the second embodiment have a current fuse 62 between the current-carrying fitting 67 and the anode terminal on the output side of the circuit board 61 . However, the formation position of the current fuse 62 is not limited to what was illustrated in the first embodiment and the second embodiment. For example, the electric toothbrush 2 according to the modified example has a current fuse 62 between the cathode fitting 63 and the cathode terminal on the output side of the circuit board 61 .

The electric toothbrushes 2 of the first embodiment and the second embodiment have a decoration ring 12 configured independently of the main body case 11 . However, the structure of the electric toothbrush 2 is not limited to what was illustrated in 1st Embodiment and 2nd Embodiment. For example, the electric toothbrush 2 according to the modified example has a part corresponding to the decoration ring 12 formed as a part of the main body case 11 instead of the decoration ring 12 . Alternatively, instead of the decorative ring 12 , there is a portion corresponding to the decorative ring 12 formed as a part of the grip housing 70 .

In the electric toothbrush 2 according to the first embodiment and the second embodiment, when the rotation position of the grip housing 70 relative to the main body case 11 is the ON position, the grip outer surface 70Z is not formed integrally with the cover outer surface 80Z. of the outer surface. However, the shape of the outer surface of the electric toothbrush 2 is not limited to those illustrated in the first embodiment and the second embodiment. For example, in the electric toothbrush 2 of the modified example, when the rotation position of the grip housing 70 relative to the main body housing 11 is the ON position and the OFF position, the grip outer surface 70Z forms an outer surface integral with the cover outer surface 80Z. surface. It should be noted that the formed integral outer surface means that when one outer surface is extended to form a virtual surface, the entire other outer surface belongs to the virtual surface.

An electric toothbrush 2 as an example of the modification described above has a cover with an N-gon in cross-section in the XY plane instead of the cover 80 and a grip case with an N-gon in cross-section in the XY plane instead of the grip case 70 . When the relative rotation positions of the N-gon-shaped cover and the N-gon grip housing are the off position and the on position, the outer surfaces of the cover and the grip housing form an integral outer surface. At this time, the rotation angle of the grip housing for changing from the off position to the on position is limited by "360 degrees/N degrees".

The electric toothbrushes 2 according to the first embodiment and the second embodiment have, as the grip coupling structure U, a structure in which the grip housing 70 can be rotated relative to the main body housing 11 . However, the structure regarding the relative movement between the main body case 11 and the grip case 70 is not limited to the content illustrated in the first embodiment and the second embodiment. For example, the electric toothbrush 2 of the modification replaces the rotation of the holding case 70 with respect to the main body case 11 or on the basis of the rotation of the holding case 70 relative to the main body case 11, and has a function that can make the main body case 11 and the holding case The body 70 relatively moves in the longitudinal direction. In this electric toothbrush 2, when the grip housing 70 is located at the first predetermined position in the longitudinal direction relative to the main body housing 11, the power supply of the motor 41 is turned off. On the other hand, when the grip housing 70 is located at the second predetermined position in the longitudinal direction with respect to the main body housing 11, the power supply of the motor 41 is turned on.

The holding connection structure U of the electric toothbrush 2 according to the first embodiment and the second embodiment has a structure in which the entire holding case 70 can be rotated relative to the main body case 11 . However, the configuration about the relative rotation between the main body case 11 and the grip case 70 is not limited to the content illustrated in the first embodiment and the second embodiment. For example, the grip connection structure U of the electric toothbrush 2 according to the modified example has two grip cases (hereinafter referred to as “divided grip cases”) that are each rotatable with respect to the main body case 11 . The split grip housing has: a lower split case including a case from the lower side wall portion 72 to the middle portion in the Z direction; and an upper split case including a case from the middle portion to the opening portion 73 . The structure of the split holding case that combines the lower split case and the upper split case is based on the structure of the grip case 70 . The grip connection structure U of this modified example has a structure capable of rotating the lower split case relative to the main body case 11 . The relative rotational state between the main body case 11 and the lower divided case has the same as the relative rotational state between the main body case 11 and the grip case 70 , including a separated state, an off state, and an on state.

The electric toothbrushes 2 of the first embodiment and the second embodiment have a motor 41 inside the upper connection portion 21 of the housing 20 . However, the position of the motor 41 is not limited to what was illustrated in the first embodiment and the second embodiment. For example, an electric toothbrush 2 according to a modified example has a motor 41 in the middle coupling portion 22 . Alternatively, the motor 41 is provided across the middle coupling portion 22 and the lower coupling portion 23 .

The decoration ring 12 of the first embodiment and the second embodiment has a structure in which two or more points of the decoration surface 12Z can be brought into contact with the installation surface of the portable oral hygiene device 1 . However, the shape of the decorative ring 12 is not limited to what was exemplified in the first embodiment and the second embodiment. For example, the decoration ring 12 of the modified example has a flat surface that can contact the installation surface of the portable oral hygiene device 1 . The flat surface is used to limit the rotation of the portable oral hygiene device 1 relative to the installation surface.

The portable oral hygiene device 1 of the first embodiment and the second embodiment includes an electric toothbrush 2 and a cover 80 . However, the components of the portable oral hygiene device 1 are not limited to those illustrated in the first embodiment and the second embodiment. For example, the portable oral hygiene device 1 of the modified example does not have the cover 80 . That is, the portable oral hygiene device 1 may be formed of only the electric toothbrush 2 .

In the first embodiment and the second embodiment, the dry battery 3 is used as the power source of the electric toothbrush 2 . However, the power supply of the electric toothbrush 2 is not limited to what was exemplified in the first embodiment and the second embodiment. For example, the electric toothbrush 2 of the modified example can use a secondary battery as a power source.

The present invention can be applied to other oral hygiene devices than the portable oral hygiene device 1 exemplified in the first embodiment and the second embodiment. As another oral hygiene device, for example, a tooth stain removing device is mentioned. The stain removing device has a grinding portion for grinding teeth; a motor for vibrating the grinding portion; a main body housing for holding the motor; and a grip housing covering an outer surface of the main body housing. In addition, the main body case and the handle case have a relative movement structure enabling relative movement between the main body case and the handle case. In addition, the relative operation structure functions as a switch of the motor.

In short, the present invention is applicable to any device as long as it is an oral hygiene device comprising: a functional part acting on the oral cavity; a motor for operating the functional part; a main body housing for holding the motor; and A handle case covering the outer surface of the main body case.

Claims (14)

1. An oral hygiene device, characterized in that the oral hygiene device has: functional parts, which act on the oral cavity; Electric motors for operating the above-mentioned functional parts; a main body housing for holding the above electric motor; and a grip housing that covers the outer surface of the above-mentioned main body housing, The main body case and the handle case include a relative movement structure enabling relative movement between the body case and the handle case, The above-mentioned relative operation structure functions as a power switch of the above-mentioned electric motor. 2. The oral hygiene device of claim 1, wherein: The relative movement structure is configured to allow relative rotation between the main body case and the handle case. 3. The oral hygiene device of claim 1 or 2, wherein, The relative movement structure is configured to change the relative rotational position between the main body case and the gripping case between a first rotational position where the power to the motor is turned off and a second rotational position where the power to the motor is turned on, The outer surface of the main body case and the outer surface of the handle case form an integral outer surface at least at the first rotational position. 4. The oral hygiene device according to any one of claims 1 to 3, wherein: The above relative action constructs include: a first rotation mechanism that allows relative rotation between the main body case and the handle case, and functions as a power switch for the motor; and The second rotation structure allows relative rotation between the main body case and the grip case, and enables the body case and the grip case to be coupled and separated from each other. 5. The oral hygiene device of claim 4, wherein: The above-mentioned first rotation structure and the above-mentioned second rotation structure allow the rotation of the above-mentioned grip housing to the direction of coupling with respect to the above-mentioned main body housing, and allow the rotation of the above-mentioned grip housing to the direction of separation with respect to the above-mentioned main body housing. The direction and the above-mentioned separation direction are opposite directions to each other, The first rotation mechanism turns on the power supply of the motor when the grip housing rotates in the coupling direction, and turns off the power supply of the motor when the grip housing rotates in the separation direction. 6. The oral hygiene device of claim 4 or 5, wherein, The first operating force ratio for switching the power supply of the motor on and off by the first rotation structure is used for switching the coupling state between the main body case and the handle case by the second rotation structure. And the second operating force in the separated state is small. 7. The oral hygiene device according to any one of claims 4 to 6, wherein: The first operation amount for switching the power supply of the motor on and off by the first rotation structure is used for switching the connection state between the main body case and the handle case by the second rotation structure. And the second operation amount of the separated state is small. 8. The oral hygiene device according to any one of claims 1 to 7, wherein: The relative movement structure allows relative movement between the main body case and the grip case in the longitudinal direction of the oral hygiene device. 9. The oral hygiene device according to any one of claims 1 to 8, wherein: The main body casing and the functional component include a part coupling structure capable of coupling and separating the main body casing and the functional component from each other, The component coupling structure allows the relative movement between the main body case and the functional component in the longitudinal direction of the oral hygiene apparatus to couple or separate the main body case and the functional component. 10. The oral hygiene device according to any one of claims 1 to 9, wherein: It also has a grip-side electrode fixed to the bottom wall of the grip case to be in contact with the first electrode of the battery. 11. The oral hygiene device of claim 10, wherein, It also has a conductive member, the conductive member is provided on the above-mentioned main body case, and is used for connecting with the second electrode of the above-mentioned battery, The relative movement structure moves the main body case and the gripping case relative to each other, so that the first electrode position where the gripping side electrode is not in contact with the conductive member and the second electrode position where the gripping side electrode is in contact with the conductive member. Between the 2 electrode positions, the position of the gripping side electrode is changed. 12. The oral hygiene device of claim 11, wherein, The main body case includes: a battery holding portion for holding the battery; and a circuit board for supplying electric power of the battery to the motor, The functional components, the motor, the circuit board, and the battery holding portion are arranged in this order along the longitudinal direction of the oral hygiene device, The above-mentioned battery holding portion includes an opening portion opposed to the bottom wall of the above-mentioned handle case, The conductive member is fixed to the battery holding portion and has a length spanning from the circuit board to the opening portion. 13. The oral hygiene device according to any one of claims 10 to 12, wherein: The grip-side electrode includes an anode contact portion connected to the anode of the battery, The holding case includes a restricting portion for restricting the anode contact portion and the cathode of the battery from contacting each other, The aforementioned restricting portion is formed of a non-conductive material, A tip portion of the restricting portion is located closer to the battery holding portion than the anode contact portion in the longitudinal direction of the grip case. 14. The oral hygiene device according to any one of claims 1 to 13, wherein: The above-mentioned functional part is a toothbrush part, The aforementioned electric motor is an electric motor having an output shaft with an eccentric weight, The oral hygiene device further includes a cover that can be coupled to and detached from the main body case or the handle case.

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