JP6057646B2 - Ion toothbrush - Google Patents

Description

  The present invention relates to an ion toothbrush.

  Conventionally, an ion toothbrush or electronic toothbrush (brushing effect is improved by incorporating a battery in the handle portion of the toothbrush and passing a current between the teeth and the brush hair through the user's hand holding the handle portion. Hereinafter, these are collectively referred to as “ion toothbrush”). This type of ion toothbrush needs to be periodically inspected to determine whether the battery voltage is maintained at a predetermined value in order to maintain the above effect.

  For example, Patent Document 1 discloses an ion toothbrush that can inspect a battery voltage by causing a light emitting unit to emit light by pressing a switch unit provided on a handle. In the ion toothbrush of Patent Document 1, electrical connection between the battery and the LED is performed by bringing a conductive connection member into contact therewith. The connection member is fixed to the handle portion with a screw and is pressed and connected to the terminal of the light emitting portion.

International Publication No. 99/62372 Pamphlet

  In the ion toothbrush of patent document 1, since the connection member is being fixed with the screw, for example, the number of parts increases, and there exists a problem that a man-hour increases with this and a cost becomes high. Therefore, for example, it is conceivable that a protrusion is provided on the inner surface of the handle, and the connection member is pressed against the terminal of the light emitting unit by the protrusion.

  However, in an ion toothbrush that includes an ultrasonic welding process in the manufacturing process, the protrusions may be deformed or melted during the ultrasonic welding process. For this reason, there is a case where the action of pressing the protrusion is insufficient, the contact between the connecting member and the terminal of the light emitting unit becomes insufficient, and the lighting failure of the light emitting unit may occur.

  One of the objects according to some aspects of the present invention is to provide an ion toothbrush that can suppress a lighting failure of a light emitting unit.

  SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following aspects or application examples.

[Application Example 1]
One aspect of the ion toothbrush according to the present invention is:
A handle gripped by the user;
A conductive spindle extending from the handle;
A head portion supported by the support shaft portion and provided with brush hairs;
A battery having a first electrode and a second electrode housed in the handle, wherein the first electrode is electrically connected to a conductive member provided on an outer surface of the handle, and the second electrode is A battery electrically connected to the support shaft;
A light emitting unit housed in the handle and having a first terminal and a second terminal;
A light transmissive portion that is provided in the handle and transmits light emitted from the light emitting portion;
A first wiring capable of electrically connecting the first terminal and the first electrode;
A second wiring capable of electrically connecting the second terminal and the second electrode;
A first protrusion provided in the light transmission portion, pressing one of the first terminal and the first wiring against the other;
A second protrusion provided in the light transmission portion, pressing one of the second terminal and the second wiring against the other;
Including
The material of the light transmission part, the first protrusion part, and the second protrusion part is polyurethane.

[Application Example 2]
In application example 1,
A switch part for pressing the second wiring against the support shaft part;
The second wiring may be electrically connected to the second electrode in contact with the support shaft portion by the switch portion.

[Application Example 3]
In application example 2,
The switch part may be made of polyurethane.

[Application Example 4]
In any one of Application Examples 1 to 3,
The first protrusion presses the first wiring against the first terminal,
The second protrusion may press the second wiring against the second terminal.

[Application Example 5]
In application example 4,
The first protrusion pushes the overlapping portion of the first wiring with the first terminal,
The second protrusion may push an overlapping portion of the second wiring with the second terminal.

[Application Example 6]
In any one of Application Examples 1 to 5,
The material of the handle may be ABS (acrylonitrile butyleneene styrene copolymer) resin.

[Application Example 7]
In any one of Application Examples 1 to 6,
The handle is
The handle body,
A cover portion fixed to the handle body by ultrasonic welding;
You may have.

  According to the ion toothbrush according to the present invention, the first protrusion presses one of the first terminal and the first wiring of the light emitting unit against the other. Therefore, the first wiring and the first terminal can be reliably brought into contact with each other. Further, the second protrusion presses one of the second terminal and the second wiring of the light emitting unit against the other. Therefore, the second wiring and the second terminal can be reliably brought into contact with each other.

  The material of the first protrusion and the second protrusion is polyurethane. Therefore, in the manufacturing process of the ion toothbrush, for example, even if the cover portion has a step of fixing the cover portion to the handle body by ultrasonic welding, the first protrusion and the second protrusion are deformed or melted. Can be suppressed. Thereby, it can suppress that the force which presses down 1st wiring and 2nd wiring to the 1st terminal and 2nd terminal of a light emission part weakens, for example. As a result, in the ion toothbrush according to the present invention, lighting failure of the light emitting unit can be suppressed.

The front view which shows typically the ion toothbrush which concerns on this embodiment. The side view which shows typically the ion toothbrush which concerns on this embodiment. The rear view which shows typically the ion toothbrush which concerns on this embodiment. The figure which shows typically the state which removed the head part of the ion toothbrush which concerns on this embodiment. The figure which shows typically the state which decomposed | disassembled the ion toothbrush which concerns on this embodiment. The figure which shows typically a part of state which decomposed | disassembled the ion toothbrush which concerns on this embodiment. The figure which shows typically the inner surface side of the cover part of the ion toothbrush which concerns on this embodiment. Sectional drawing which shows the ion toothbrush which concerns on this embodiment typically. Sectional drawing which shows the ion toothbrush which concerns on this embodiment typically. Sectional drawing which shows the ion toothbrush which concerns on this embodiment typically.

  DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. The embodiments described below do not unduly limit the contents of the present invention described in the claims. In addition, not all of the configurations described below are essential constituent requirements of the present invention.

  FIG. 1 is a front view schematically showing an ion toothbrush 100 according to the present embodiment. FIG. 2 is a side view schematically showing the ion toothbrush 100 according to the present embodiment. FIG. 3 is a rear view schematically showing the ion toothbrush 100 according to the present embodiment. FIG. 4 is a diagram schematically illustrating a state where the head portion 90 of the ion toothbrush 100 according to the present embodiment is removed. FIG. 5 is a diagram schematically showing a state in which the ion toothbrush 100 according to the present embodiment is disassembled. FIG. 6 is a diagram schematically showing a part of a state in which the ion toothbrush 100 according to the present embodiment is disassembled, and is an enlarged view of a region A shown in FIG. FIG. 7 is a view schematically showing the inner surface 132 side of the cover portion 130 of the ion toothbrush 100 according to the present embodiment. FIG. 8 is a sectional view taken along line VIII-VIII in FIG. 1 schematically showing the ion toothbrush 100 according to the present embodiment. FIG. 9 is a cross-sectional view taken along the line IX-IX of FIG. 1 schematically showing the ion toothbrush 100 according to the present embodiment. FIG. 10 is a cross-sectional view taken along the line XX of FIG. 1 schematically showing the ion toothbrush 100 according to the present embodiment.

  For convenience, in FIG. 5, illustration of the conductive member 26, the leaf spring 27, the seal member 28, and the head portion 90 is omitted. FIG. 8 is also a cross-sectional view corresponding to the line VIII-VIII shown in FIG. FIG. 9 is a cross-sectional view corresponding to the line IX-IX shown in FIG. 10 is also a cross-sectional view corresponding to line XX shown in FIG. 1 to 10 illustrate the X axis, the Y axis, and the Z axis as three axes orthogonal to each other.

  As shown in FIGS. 1 to 10, the ion toothbrush 100 includes a handle portion 10, a battery 20, a conductive member 26, a support shaft portion 30, a light emitting portion 40, a light transmitting portion 50, and a first protruding portion. 52, the second protrusion 54, the first wiring 60, the second wiring 70, the switch unit 80, and the head unit 90.

  The handle part 10 is a part that the user holds. The shape of the handle 10 is not particularly limited as long as the user can hold it, but in the illustrated example, the shape extends in the Y-axis direction. The material of the handle 10 is, for example, ABS (acrylonitrile butadiene styrene copolymer) resin. The handle part 10 can accommodate the battery 20, the light emitting part 40, and the wirings 60 and 70. The handle portion 10 includes a handle portion main body 110 and a cover portion 130.

  As shown in FIG. 5, the handle portion main body 110 has a surface 112 (a surface facing the cover portion 130) that is covered by the cover portion 130. The surface 112 is provided with a recess 114.

  The cover part 130 can close the handle part main body 110. The cover part 130 has the convex part 134 provided in the inner surface (surface which faces the pattern part main body 110 side) 132, as shown in FIG. The convex portion 134 projects from the inner surface 132 toward the handle main body 110 (in the illustrated example, in the −Z-axis direction). The convex part 134 is provided corresponding to the concave part 114 provided in the handle body 110. In the example shown in FIG. 7, the convex portion 134 is provided along the outer edge of the cover portion 130.

  The cover part 130 can be fixed to the handle part main body 110 by ultrasonic welding. Specifically, pressure is applied while applying ultrasonic vibration in a state where the convex portion 134 of the cover portion 130 is inserted into the concave portion 114 provided in the handle portion main body 110. Thereby, the convex part 134 and the recessed part 114 are welded to each other, and the cover part 130 can be fixed to the handle part main body 110. 1-4 and FIGS. 8-10 have shown the state after the cover part 130 was welded to the handle | pattern part main body 110. FIG. In ultrasonic welding, the frequency of ultrasonic vibration can be appropriately set in accordance with the size, shape, and material of the convex portion 134, but when the material of the cover portion 130 and the handle portion main body 110 is ABS resin, For example, it is 15 kHz or more and 25 kHz or less, more preferably 18 kHz or more and 20 kHz or less. The pressure applied in the ultrasonic welding can be appropriately set according to the size, shape, and material of the convex portion 134. However, when the material of the cover portion 130 and the handle portion main body 110 is ABS resin, for example, 0 is used. .4 MPa or more and 0.6 MPa or less.

  The battery 20 is accommodated in the handle 10 as shown in FIGS. 5 and 8. Specifically, the battery 20 is housed in a battery housing hole 113 formed in the surface 112 of the handle 10. In the illustrated example, the battery 20 is placed on a protrusion 115 provided at the bottom of the battery housing hole 113. The battery 20 is, for example, a disk-shaped lithium battery. The battery 20 includes a first electrode 22 (for example, a positive electrode) and a second electrode 24 (for example, a negative electrode). The cover portion 130 is provided with an opening 133 that communicates with the battery housing hole 113.

  As shown in FIG. 8, the first electrode 22 of the battery 20 is electrically connected to a conductive member 26 provided on the outer surface 12 of the handle 10 via a leaf spring 27. The second electrode 24 of the battery 20 is electrically connected to the support shaft portion 30. Specifically, a part of the support shaft portion 30 is exposed at the bottom of the battery housing hole 113, and the second electrode 24 is in contact with the exposed support shaft portion 30.

  As shown in FIGS. 1 and 4, the support shaft portion 30 extends from the handle portion 10. Specifically, the support shaft part 30 extends from the tip of the handle part main body 110 (the end on the side where the head part 90 is attached) to the vicinity of the brush part 92 when the head part 90 is attached to the handle part 10. The portion 10 extends in the longitudinal direction (Y-axis direction in the illustrated example). The support shaft portion 30 has, for example, a rod shape.

As shown in FIG. 5, the support shaft portion 30 further includes a portion in the handle portion main body 110 that extends in the longitudinal direction of the handle portion main body 110. Specifically, the support shaft portion 30 extends from the tip of the handle body 110 to a position beyond the opening 116. The opening 116 is formed on the surface 112 of the handle main body 110 and exposes the support shaft 30. The opening 116 is formed on the proximal end (end opposite to the distal end) side of the handle main body 110 with respect to the battery housing hole 113. The support shaft portion 30 is conductive. The material of the support shaft part 30 is, for example, stainless steel.

  The light emitting unit 40 is accommodated in the handle 10 as shown in FIGS. The light emitting unit 40 includes a light emitting unit main body 42, a first terminal 44, and a second terminal 46. The light emitting unit main body 42 is housed in a light emitting unit housing hole 118 formed in the handle body 110. The light emitting portion accommodating hole 118 is formed on the proximal end (end opposite to the distal end) side of the handle portion main body 110 with respect to the opening portion 116. As the light emission part main body 42, LED (Light Emitting Diode) is used, for example.

  The first terminal 44 and the second terminal 46 of the light emitting unit 40 extend from the light emitting unit main body 42 in the short direction of the handle 10 (X-axis direction in the illustrated example) and in opposite directions. In the illustrated example, the first terminal 44 extends from the light emitting unit main body 42 in the + X axis direction, and the second terminal 46 extends from the light emitting unit main body 42 in the −X axis direction. The terminals 44 and 46 are placed on the placement surface 119 of the handle body 110. The mounting surface 119 is formed with a light emitting portion accommodation hole 118. The placement surface 119 is a flat surface and may be a surface lower than the surface 112 of the handle body 110 (a surface located in the −Z-axis direction). The terminals 44 and 46 are conductive. The material of the terminals 44 and 46 is, for example, a copper alloy.

  The light transmission part 50 is provided in the handle part 10. Specifically, the light transmission part 50 is provided in an opening 136 formed in the cover part 130. The opening 136 penetrates the cover part 130. A part of the light transmission part 50 is exposed on the outer surface 12 (outer surface of the handle part 10) 12 of the cover part 130. The planar shape (the shape seen from the Z-axis direction) of the light transmission part 50 is not particularly limited, but is circular in the example shown in FIG. The light transmitting part 50 is provided so as to overlap the light emitting part 40 in plan view (viewed from the Z-axis direction). The light transmission unit 50 can transmit the light emitted from the light emitting unit 40. Thereby, the light which the light emission part 40 emits can be confirmed from the outer side of the ion toothbrush 100. FIG.

  The first protrusion 52 and the second protrusion 54 are provided in the light transmission part 50 as shown in FIGS. 7 and 10. Specifically, as shown in FIG. 10, the protrusions 52 and 54 are provided on the inner surface 51 (surface facing the handle body 110 side) of the light transmission portion 50. The protrusions 52 and 54 protrude from the inner surface 51 to the handle body 110 side. The planar shape of the protrusions 52 and 54 is not particularly limited, but is circular in the example shown in FIG.

  The first protrusion 52 is provided so as to overlap the first terminal 44 and the first wiring 60 of the light emitting unit 40 in plan view. The first protrusion 52 presses one of the first terminal 44 and the first wiring 60 of the light emitting unit 40 against the other (details will be described later). The second protrusion 54 is provided so as to overlap the second terminal 46 and the second wiring 70 of the light emitting unit 40 in plan view. The second protrusion 54 presses one of the second terminal 46 and the second wiring 70 of the light emitting unit 40 against the other (details will be described later).

  The material of the light transmission part 50, the 1st protrusion part 52, and the 2nd protrusion part 54 is a polyurethane, for example, is the polyurethane synthesize | combined by the polyaddition reaction of diisocyanate and diol. The light transmission part 50 and the projection parts 52 and 54 are integrally formed by injection molding, for example.

The first wiring 60 is accommodated in the handle 10 as shown in FIG. The first wiring 60 can electrically connect the first terminal 44 of the light emitting unit 40 and the first electrode 22 of the battery 20. Specifically, the first portion 62 of the first wiring 60 is in contact with the first terminal 44. The second portion 64 of the first wiring 60 is in contact with the first electrode 22.

  In the example illustrated in FIG. 5, the first portion 62 of the first wiring 60 is a portion near the end portion of the first wiring 60 in the −Y axis direction. Specifically, the first portion 62 is an overlapping portion of the first wiring 60 with the first terminal 44 of the light emitting unit 40 in plan view. As shown in FIG. 10, the first portion 62 is in contact with the first protrusion 52. The first protrusion 52 can have elasticity and presses the first wiring 60 against the first terminal 44. Thereby, the 1st part 62 and the 1st terminal 44 can be made to contact reliably. In the example illustrated in FIG. 10, the first protrusion 52 presses the first portion 62.

  In the example illustrated in FIG. 5, the second portion 64 of the first wiring 60 is an end portion in the + Y-axis direction of the first wiring 60. The second portion 64 is in contact with the first electrode 22 of the battery 20 in the + X axis direction of the battery 20. The first wiring 60 has a bent portion 66 bent in a substantially U shape. In the illustrated example, the first wiring 60 is bent in the + X-axis direction as it goes from the bent portion 66 in the + Y-axis direction. The second portion 64 can be pressed against the first electrode 22 by the curved shape and the elasticity of the first wiring 60. Thereby, the 2nd part 64 and the 1st electrode 22 can be made to contact reliably. Further, the bent portion 66 can prevent the first wiring 60 from being displaced in the longitudinal direction of the handle body 110.

  The second wiring 70 is accommodated in the handle 10. The second wiring 70 can electrically connect the second terminal 46 of the light emitting unit 40 and the second electrode 24 of the battery 20. Specifically, the third portion 72 of the second wiring 70 is in contact with the second terminal 46. The fourth portion 74 of the second wiring 70 comes into contact with the support shaft portion 30 and is electrically connected to the second electrode 24 when the switch portion 80 is pushed (details will be described later).

  In the example illustrated in FIG. 5, the third portion 72 of the second wiring 70 is a portion near the end portion of the second wiring 70 in the −Y axis direction. Specifically, the third portion 72 is an overlapping portion of the second wiring 70 with the second terminal 46 of the light emitting unit 40 in plan view. As shown in FIG. 10, the second wiring 70 is in contact with the second protrusion 54. The second protrusion 54 can have elasticity and presses the second wiring 70 against the second terminal 46. Thereby, the 3rd part 72 and the 2nd terminal 46 can be made to contact reliably. In the example shown in FIG. 10, the second protrusion 54 pushes the third portion 72.

  In the example shown in FIG. 5, the fourth portion 74 of the second wiring 70 is an end portion of the second wiring 70 in the + Y-axis direction. The second wiring 70 is bent into a substantially L shape and constitutes a fourth portion 74 extending in the X-axis direction. The fourth portion 74 overlaps the support shaft 30 exposed at the opening 116 in plan view. As shown in FIG. 9, the fourth end portion 74 is separated from the support shaft portion 30 in a state where the switch portion 80 is not pushed. When the switch portion 80 is pushed, the fourth end portion 74 is displaced toward the support shaft portion 30 and comes into contact with the support shaft portion 30. Thereby, the 2nd wiring 70 is electrically connected with the 2nd electrode 24 of the battery 20, and the light emission part 40 lights.

  Note that the end 75 of the fourth portion 74 of the second wiring 70 may be bent toward the support shaft 30 as shown in FIG. Thereby, in the state where switch part 80 was pushed, the 2nd wiring 70 and spindle 30 can be contacted more certainly.

  As shown in FIG. 5, the second wiring 70 has a bent portion 76 bent in a substantially U shape. Due to the elasticity of the bent portion 76 and the second wiring 70, the fourth portion 74 of the second wiring 70 and the support shaft portion 30 can be separated from each other when the switch portion 80 is not pressed. Further, the bent portion 76 can suppress the second wiring 70 from shifting in the longitudinal direction of the handle body 110.

  In the example shown in FIG. 5, the first wiring 60 and the second wiring 70 are provided in the groove 120 formed on the surface 112 of the handle body 110. The groove 120 can be arbitrarily designed according to the size and shape of the wirings 60 and 70. As shown in FIG. 5, the surface 112 may be provided with a plurality of protrusions 122. Thereby, it can suppress that wiring 60,70 shifts to pattern part main part 110. FIG. In addition, as shown in FIG. 7, a recess 137 may be formed on the inner surface 132 of the cover portion 130 at a position corresponding to the protruding portion 122.

  The first wiring 60 and the second wiring 70 are made of, for example, a wire having a circular cross section. Thereby, the wirings 60 and 70 can be easily processed. The cross-sectional shapes of the wirings 60 and 70 are not particularly limited as long as they can have elasticity. The wirings 60 and 70 are conductive. The material of the wirings 60 and 70 is, for example, stainless steel.

  The switch part 80 is provided in the handle | steering-piece part 10, as shown in FIG. 5 and FIG. Specifically, the switch unit 80 is provided in an opening 138 formed in the cover unit 130. The opening 138 passes through the cover part 130. The material of the switch unit 80 is polyurethane. That is, the material of the switch unit 80 is the same as the material of the light transmitting unit 50, the first projecting unit 52, and the second projecting unit 54. The switch portion 80 is a portion for pressing the second wiring 70 against the support shaft portion 30.

  As shown in FIG. 9, the switch unit 80 has a switch knob 82. The switch knob 82 protrudes from the cover portion 130 side toward the handle portion main body 110 side (in the illustrated example, in the −Z-axis direction). Although the shape of the switch knob 82 is not specifically limited, For example, it is cylindrical. In the illustrated example, the switch knob 82 is in contact with the second wiring 70 in a state where the switch unit 80 is not pressed, but may be separated from the second wiring 70.

  The switch portion 80 has a portion exposed at the outer surface 12 (outer surface of the handle portion 10) 12 of the cover portion 130. By pushing the exposed portion of the switch portion 80 toward the handle portion main body 110, the switch portion 80 is elastically deformed, and the switch knob 82 is displaced toward the handle portion main body 110 side. As the switch knob 82 is displaced, the second wiring 70 comes into contact with the support shaft portion 30. Thereby, a closed circuit is formed, and the light emitting unit 40 is turned on (details will be described later).

  As shown in FIG. 8, the conductive member 26 is provided on the outer surface 12 of the handle portion 10. Specifically, the conductive member 26 is provided on the outer surface 12 around the battery 20 so as to cover the battery accommodation hole 113 and the opening 133. For example, the conductive member 26 is formed by bending a conductive plate along the outer surface 12 around the battery 20 at a predetermined position and bending both end portions 26a and 26b inwardly (in the + Z-axis direction). By being engaged with locking grooves 124 a and 124 b formed in the main body 110, the main body 110 is fixed to the handle portion 10. The material of the conductive member 26 is, for example, titanium or stainless steel.

  A conductive leaf spring 27 is provided between the conductive member 26 and the battery 20. The leaf spring 27 has elasticity, and can reliably electrically connect the conductive member 26 and the first electrode 22 of the battery 20. Further, the leaf spring 27 can reliably contact the second electrode 24 of the battery 20 and the support shaft portion 30.

  A seal member 28 is provided around the opening 133 communicating with the battery housing hole 113. As the seal member 28, for example, an O-ring is used. The sealing member 28 can seal the battery 20 in a watertight manner with respect to the outside.

As shown in FIG. 4, an engagement portion 126 for detachably fixing the head portion 90 is provided at the tip of the handle portion main body 110. As shown in FIG. 4, the pattern body 110 and the cover 130 may be provided with a step 150 that prevents slipping when the user grips it.

  The head portion 90 is supported by the support shaft portion 30. The head portion 90 includes a brush portion 92 in which brush bristles 91 are provided (planted), and a shank portion 93 that is constricted and extends from the brush portion 92. An opening 95 that exposes a part of the support shaft portion 30 is formed at a position near the brush portion 92 on the surface 94 of the head portion 90 where the bristles 91 are implanted. The material of the head part 90 is, for example, ABS resin or PP (polypropylene) resin.

  The shank portion 93 is formed with a support shaft portion insertion hole 96 into which the support shaft portion 30 is inserted. The spindle insertion hole 96 communicates with the opening 95. On the side of the shank portion 93 that is connected to the handle portion 10, an engagement recess 97 that engages with the engagement portion 126 formed in the handle portion main body 110 is provided.

  In the ion toothbrush 100, when the handle 10 is gripped while touching the conductive member 26 and the teeth are brushed by the brush bristles 91, the brush bristles 91 are wetted by a liquid such as saliva, and a series of liquids including the opening 95 is connected. It will be in the state which can be electrically connected with the spindle 30 via a path | route. That is, the opening 95 is an opening for allowing the bristles 91 and the support shaft 30 to be electrically connected with each other using a liquid as a medium. As a result, current flows from the battery 20 through the path of the user's hand, body, teeth, brush bristles 91, liquid path including the opening 95, the support shaft 30, and the battery 20; The brushing effect can be enhanced.

  In the ion toothbrush 100, when the battery 20 is inspected (when the validity of the battery 20 is confirmed), the switch unit 80 is pressed. Thereby, the 2nd wiring 70 contacts the spindle part 30, and the electrical circuit of the battery 20, the 1st wiring 60, the light emission part 40, the 2nd wiring 70, the spindle part 30, and the battery 20 is comprised. At this time, when the battery 20 has a predetermined voltage, the light emitting unit 40 is turned on by pressing the switch unit 80, indicating the effectiveness thereof. On the other hand, when the battery 20 is exhausted and does not have a predetermined voltage, the light emitting unit 40 does not light even when the switch unit 80 is pressed.

  Further, when the pressing of the switch portion 80 is stopped, the second wiring 70 is separated from the support shaft portion 30 due to the elasticity of the second wiring 70. Thereby, the above-mentioned electric circuit becomes an open circuit, and the light emitting unit 40 is turned off. As described above, the switch unit 80 can open and close the electric circuit including the battery 20 and the light emitting unit 40.

  In the example described above, the first protrusion 52 has been described as pressing the first wiring 60 against the first terminal 44 of the light emitting unit 40, but the first protrusion 52 is the first of the light emitting unit 40. The terminal 44 may be pressed against the first wiring 60. Similarly, the second protrusion 54 may press the second terminal 46 of the light emitting unit 40 against the second wiring 70.

  In the above-described example, the mode in which the contact between the second wiring 70 and the support shaft portion 30 is performed by the switch unit 80 has been described. However, the contact between the first wiring 60 and the support shaft portion 30 is performed by the switch unit 80. Also good. The switch unit 80 can be provided at any position as long as the electrical circuit including the battery 20 and the light emitting unit 40 can be opened and closed.

  In the above-described example, the form in which the head unit 90 is separable from the handle unit 10 has been described. However, the head unit 90 and the handle unit 10 may be integrally formed.

Further, the arrangement of the light emitting unit 50 and the switch unit 80 is not limited to the illustrated example, and is arbitrary as long as the above functions are not impaired.

  The light emitting unit 50 and the switch unit 80 may be fitted into the openings 136 and 138 of the cover unit 130 after being formed by injection molding in a separate process from the cover unit 130. Furthermore, the light emitting unit 50 and the switch unit 80 may be in close contact with the inner surfaces of the openings 136 and 138 of the cover unit 130 by, for example, an adhesive from the viewpoint of waterproofing. Or the light emission part 50, the switch part 80, and the cover part 130 may be continuously formed using the injection molding machine provided with the injection machine which injects ABS resin, and the injection machine which injects urethane resin.

  The ion toothbrush 100 according to the present embodiment has the following features, for example.

  According to the ion toothbrush 100, the first protrusion 52 presses one of the first terminal 44 and the first wiring 60 of the light emitting unit 40 against the other. Specifically, the first protrusion 52 presses the first wiring 60 against the first terminal 44. Therefore, the first wiring 60 and the first terminal 44 can be reliably brought into contact with each other. Further, the second protrusion 54 presses one of the second terminal 46 and the second wiring 70 of the light emitting unit 40 against the other. Specifically, the second protrusion 54 presses the second wiring 70 against the second terminal 46. Therefore, the second wiring 70 and the second terminal 46 can be reliably brought into contact with each other.

  The material of the first protrusion 52 and the second protrusion 54 is polyurethane. Therefore, in the manufacturing process of the ion toothbrush 100, for example, even if the cover 130 is fixed to the handle main body 110 by ultrasonic welding, the protrusions 52 and 54 are prevented from being deformed or melted. it can. Thereby, it can suppress that the force which presses the wiring 60 and 70 to the terminals 44 and 46 of the light emission part 40 weakens. As a result, in the ion toothbrush 100, lighting failure of the light emitting unit 40 can be suppressed. Moreover, the yield at the time of manufacture of the ion toothbrush 100 can be improved.

  For example, in the case where the protrusion is made of the same ABS resin as the material of the cover, the protrusion starts to melt during ultrasonic welding, and the force for pressing the wiring against the terminal of the light emitting portion may be weakened. As a result, the contact between the wiring and the terminal of the light emitting unit becomes insufficient, and lighting failure may occur.

  Furthermore, in the ion toothbrush 100, the 1st projection part 52 and the 2nd projection part 54 are provided in the light transmissive part 50, and the material of the light transmissive part 50 is a polyurethane. Therefore, for example, the light transmission part 50 and the projection parts 52 and 54 can be integrally formed by injection molding. As a result, in the ion toothbrush 100, for example, the manufacturing process can be simplified and the cost can be reduced.

  According to the ion toothbrush 100, the second wiring 70 is in contact with the support shaft portion 30 by the switch portion 80 and is electrically connected to the second electrode 24 of the battery 20. Therefore, in the ion toothbrush 100, as described above, the voltage of the battery 20 can be easily inspected by pressing the switch unit 80 only when the voltage of the battery 20 is inspected. Furthermore, consumption of the battery 20 due to voltage inspection can be reduced.

  According to the ion toothbrush 100, the material of the switch unit 80 is polyurethane. Therefore, the switch part 80 can be formed using the same material as the light transmission part 50 and the projection parts 52 and 54. As a result, in the ion toothbrush 100, for example, cost reduction can be achieved.

According to the ion toothbrush 100, the first protrusion 52 pushes the overlapping portion (first portion) 62 of the first wiring 60 with the first terminal 44 of the light emitting unit 40. The second protrusion 54 is connected to the second wiring 7.
The overlapping portion (third portion) 72 of the light emitting portion 40 with the second terminal 46 is pushed. Therefore, in the ion toothbrush 100, for example, the wirings 60 and 70 and the terminals 44 and 46 can be brought into contact with each other more reliably than when the portion of the wiring that does not overlap with the terminal of the light emitting unit is pressed.

  According to the ion toothbrush 100, the handle part 10 has the handle part body 110 and the cover part 130 fixed to the handle part body 110 by ultrasonic welding. Therefore, in the ion toothbrush 100, for example, the manufacturing process can be simplified as compared with the case where the cover portion is fixed to the handle body using solder.

  The present invention is not limited to the above-described embodiments, and various modifications can be made. The present invention can be appropriately combined with the above-described embodiments and modifications. Further, the present invention includes, for example, a configuration substantially the same as the configuration described in the embodiment (for example, a configuration having the same function, method, and result, or a configuration having the same purpose and effect). In addition, the invention includes a configuration in which a non-essential part of the configuration described in the embodiment is replaced. In addition, the present invention includes a configuration that achieves the same effect as the configuration described in the embodiment or a configuration that can achieve the same object. In addition, the invention includes a configuration in which a known technique is added to the configuration described in the embodiment.

DESCRIPTION OF SYMBOLS 10 ... Pattern part, 12 ... Outer surface, 20 ... Battery, 22 ... 1st electrode, 24 ... 2nd electrode, 26 ... Conductive member, 26a, 26b ... End part, 27 ... Leaf spring, 28 ... Seal member, 30 ... Supporting shaft portion, 40 ... light emitting portion, 42 ... light emitting portion main body, 44 ... first terminal, 46 ... second terminal, 50 ... light transmitting portion, 51 ... inner surface, 52 ... first projection, 54 ... second projection , 60 ... 1st wiring, 62 ... 1st part, 64 ... 2nd part, 66 ... Bending part, 70 ... 2nd wiring, 72 ... 3rd part, 74 ... 4th part, 75 ... End, 76 ... Bending , 80 ... switch part, 82 ... switch knob, 90 ... head part, 91 ... brush hair, 92 ... brush part, 93 ... shank part, 94 ... surface, 95 ... opening part, 96 ... spindle part insertion hole, 97 ... engaging recess, 100 ... toothbrush, 110 ... handle body, 112 ... surface, 113 ... battery housing hole, 114 ... recess DESCRIPTION OF SYMBOLS 115 ... Projection part, 116 ... Opening part, 118 ... Light emission part accommodation hole, 119 ... Mounting surface, 120 ... Groove part, 122 ... Projection part, 124a, 124b ... Locking groove, 126 ... Engagement part, 130 ... Cover part , 132 ... Inner surface, 133 ... Opening part, 134 ... Projection part, 136 ... Opening part, 137 ... Recessed part, 138 ... Opening part, 150 ... Step part

Claims (5)

A handle gripped by the user;
A conductive spindle extending from the handle;
A head portion supported by the support shaft portion and provided with brush hairs;
A battery having a first electrode and a second electrode housed in the handle, wherein the first electrode is electrically connected to a conductive member provided on an outer surface of the handle, and the second electrode is A battery electrically connected to the support shaft;
A light emitting unit housed in the handle and having a first terminal and a second terminal;
A light transmissive portion that is provided in the handle and transmits light emitted from the light emitting portion;
A first wiring capable of electrically connecting the first terminal and the first electrode;
A second wiring capable of electrically connecting the second terminal and the second electrode;
Provided in the light transmitting section, and the first protrusion of the front Symbol first wiring are pressed against the first terminal,
Provided in the light transmitting portion, and a second protrusion the front Stories second wiring are pressed against the second terminal,
Including
The light transmitting portion, the first protrusion, and the material of the second protrusion, Ri polyurethane der,
The handle is
The handle body,
A cover part fixed to the handle part body;
Have
The first terminal is placed on the first placement surface of the handle body,
The second terminal is placed on the second placement surface of the handle body,
The light transmission part is provided in an opening formed in the cover part,
The first protrusion protrudes from the inner surface of the light transmission portion toward the first placement surface,
The second protrusion protrudes from the inner surface of the light transmission portion toward the second placement surface,
The first protrusion has a first surface facing the first placement surface,
The second protrusion has a second surface facing the second placement surface,
The first protrusion is in contact with the first wiring on the first surface and presses the first wiring against the first terminal;
The second protrusion is in contact with the second wiring on the second surface and presses the second wiring against the second terminal . In claim 1,
A switch part for pressing the second wiring against the support shaft part;
The second wiring is an ion toothbrush that is in contact with the support shaft portion and is electrically connected to the second electrode by the switch portion. In claim 2,
An ion toothbrush in which the material of the switch part is polyurethane. In any one of Claims 1 thru | or 3 ,
The first protrusion pushes the overlapping portion of the first wiring with the first terminal,
The second toothed portion is an ion toothbrush that presses an overlapping portion of the second wiring with the second terminal. Oite to any one of claims 1 to 4,
An ion toothbrush in which the material of the handle is ABS (acrylonitrile butadiene styrene copolymer) resin.

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