JP2007105449A - Toothbrush - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a toothbrush, achieving comfortable brushing for both the inside and outside of a tooth when holding a grip in the longitudinal direction and brushing in the longitudinal direction. <P>SOLUTION: This toothbrush 30 includes: the grip 31 having a holding part 34: and a head 32 in which a plurality of bristles 33 are planted at the base 39. The grip 31 is provided with a connecting part 36 extended from the tip of the holding part 34 obliquely to the axial A direction of the holding part so that the holding part axis A extending in the longitudinal direction of the holding part 34 and the grip side end of the head 32 are separated from each other by a predetermined distance (h) and also connecting the head 32 so that the axis B of the head is at a predetermined angle to the holding part axis A. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a toothbrush used for brushing teeth.

A configuration of a general toothbrush will be described.
The toothbrush is composed of a handle and a head, and the handle has a gripping part to be gripped by a user and a connecting part for connecting the gripping part and the head, and the head is provided at the tip of the connecting part.
Some of the connecting parts are linear and are provided on the same straight line as the gripping part, but are provided so that the head is arranged on the axis of the gripping part with a slight curve. There is also.

There are several methods for brushing teeth using such a toothbrush, such as a rolling method and a scraping method, all of which have the handle gripping part and the head lengthwise with the handle facing the horizontal direction. It is polished so that the direction is horizontal.
However, in such a polishing method, since the movement of the hand holding the grip portion is impossible, it becomes cumbersome and it becomes a rough polishing method. Also, even with this kind of correct polishing, you may feel that it is not as beautiful as you think.

On the other hand, as shown in FIG. 14, so-called vertical brushing, in which toothpaste is performed by holding the handle 10 in the vertical direction and moving the hand up and down, is conventionally known. In addition, a toothbrush for vertical polishing configured to have a T-shape in which the longitudinal direction of the head is orthogonal to the axial direction of the handle has been proposed so as to be suitable for vertical polishing (for example, a patent) Reference 1)
However, with a T-shaped toothbrush as shown in Patent Document 1, the front side of the tooth is easy to brush, but there is a problem that it is difficult to polish by inserting a head inside the tooth.

In addition, a toothbrush having a structure in which a head is rotated with respect to a handle is disclosed in order to make it easy to brush both the inside and the front side of a tooth with a single toothbrush (see, for example, Patent Document 2).
According to this, by enabling the head provided at the tip of the curved handle to be rotated in the axial direction of the handle, the head can be rotated and used in accordance with the place of use and the method of use. .

JP-A-6-151072 Registered Utility Model No. 3035897

  When trying to brush vertically, it is difficult to brush the inside of a tooth with a toothbrush as in Patent Document 1, and with a toothbrush as shown in Patent Document 2, no matter how much the pattern is bent, the front side of the tooth There is a problem that both the inner side and the inner side can be polished comfortably, and when polishing either side, it becomes a halfway polishing comfort.

  Therefore, the present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a toothbrush that can comfortably polish both the inside and the front side of a tooth when the handle is gripped in the vertical direction and polished in the vertical direction. There is to do.

According to the toothbrush according to the present invention, in a toothbrush comprising a handle having a grip portion and a head having a plurality of bristles planted in the base portion, the handle has a grip portion axis extending in the longitudinal direction of the grip portion. Extending from the tip of the gripping portion in an oblique direction with respect to the gripping portion axial direction so that the head side end portion of the head is spaced apart by a predetermined distance, and the head axis is at a predetermined angle with respect to the gripping portion axis The connection part which connects a head is provided so that it may become.
By adopting such a configuration, the gripping part of the handle and the head are spaced apart from each other by a predetermined distance, so that the teeth and lips do not get in the way by this distance, and the handle can be inserted even if the head is inserted inside the teeth. The gripping part can be arranged at a position sufficiently away from the face outside the mouth. For this reason, the hand gripping the gripping part does not hit the face, and it is easy to brush vertically even inside the teeth.
Further, since the head axis is at a predetermined angle with respect to the gripping part axis, the condition that the tip of the hair hits the teeth is good.

The head may be attached to the connecting portion so as to be rotatable about a head width direction axis extending in the width direction of the head.
According to this configuration, the direction of the hair tip of the head can be changed with respect to the grip portion axis. That is, the direction of the hair tip of the head can be changed between the case of brushing the outside of the tooth and the case of brushing the inside of the tooth, and the inside and outside of the tooth can be easily brushed in the vertical direction with a single toothbrush.

  In addition, by providing the head so that it can be fixed at a predetermined position when the head is rotated about the axis in the width direction of the head, the direction of the hair tip changes depending on whether the inside of the tooth is polished or the outside of the tooth is polished. However, since the head can be fixed at that position, the direction of the hair tip does not change during polishing, and the head can be polished stably.

At the tip of the connecting portion, there is provided a projection that protrudes in the direction of the head and is formed with an insertion hole into which a shaft serving as the center of rotation of the head can be inserted. The head is rotated at the tip of the projection. A plurality of concave grooves are provided in accordance with the position of the head, and an insertion hole is formed at the end of the connecting portion side of the head so as to protrude in the direction of the connecting portion and into which the shaft can be inserted. There are provided a head protrusion to be connected to the connecting portion, a fitting portion to be fitted into the concave groove, and a biasing means for biasing the fitting portion in the concave groove direction, and the fitting portion is fitted into any of the concave grooves. In this case, the head may be fixed at the position.
According to this configuration, when the head is rotated in order to change the direction of the hair end of the head, the head can be rotated stepwise at the position of the groove provided in advance. When the head is rotated to a different position, the head is moved against the urging force of the urging means.

The connecting portion is provided so as to connect the gripping portion and the head so that a head axis is at an angle of 0 to 25 degrees with respect to the gripping portion axis, and a hair of the head is provided at a tip. A head is provided such that the head can be adjusted so that the tip is directed to either the gripping part axis line side or the opposite side of the gripping part axis line.
According to this configuration, the gripping portion of the handle and the head are spaced apart from each other, and the gripping portion and the head have an angle of 0 degree (the head axis line and the gripping part axis line are parallel) to 25 degrees. Since it is arranged, the head moves in substantially the same direction as the movement direction of the handle (gripping part).
Therefore, when using the head of the head toward the grip portion axis, if the head is placed vertically on the inside of the teeth, the handle is also arranged vertically on the outside of the mouth so that the teeth and lips are in the way. It is easy to brush the inside of the teeth in the vertical direction without losing the teeth. When using the head's hair tip in the direction opposite to the gripper axis, the handle is placed vertically on the outside of the mouth and the lips etc. Instead, it becomes easy to brush the front side of the teeth in the vertical direction.
In this way, it is possible to easily polish both the inside and front side of the teeth with a vertical brush with a single toothbrush.

The head may be provided in the connecting portion so as to be rotatable about the head axis.
According to this configuration, by rotating the head, the direction of the hair tip of the head can be changed to switch between polishing the front side or the inner side of the teeth.

The head may be provided at a distal end portion of the connecting portion so as to be rotatable about a head width direction axis extending in the width direction of the head.
According to this configuration, by rotating the head, the direction of the hair tip of the head can be changed to switch between polishing the front side or the inner side of the teeth.

The connecting portion may be provided in the gripping portion so as to be rotatable so that a connecting portion axis extending in the longitudinal direction of the connecting portion is located on the same straight line as the gripping portion axis.
By adopting this configuration, the head to the grip portion can be arranged in a straight line. That is, it has a shape similar to the shape of a conventional toothbrush and is convenient to carry and store.

Furthermore, the hair of the head may be formed in a mountain shape so that the length of the hair at the center is long in both the longitudinal direction and the width direction of the head.
According to this configuration, when brushing vertically, even if the tip of the hair is not in contact with the teeth in the vertical direction, at least the tip of the chevron is in contact with the teeth, so that a good polishing comfort can be obtained. Can do.

The bristles of the head may be characterized in that the bristles are arranged obliquely so as to go to the center in the longitudinal direction of the head when viewed from the side of the head.
The effect | action by having comprised in this way is as follows. The toothbrush of the present invention has been developed to perform vertical brushing in the vertical direction, but the bristles on the end side in the longitudinal direction of the head come into contact with the gums when brushed in the vertical direction. Brushing the gums is also important for the action of the toothbrush, but in the conventional hair orientation, the tip of the hair directly contacts the gums, which may cause pain and discomfort. Therefore, since the hair is directed toward the center in the longitudinal direction of the head, the tip of the hair located on the end of the head in the longitudinal direction does not directly contact the gums. Can be reduced.

The hair of the head is planted in a direction perpendicular to the base, and the base is curved so that both ends in the longitudinal direction of the head are in the direction in which the hair extends. Thus, the hair may be arranged obliquely so as to go to the center in the longitudinal direction of the head.
According to this configuration, even when the hairs are arranged obliquely, the hairs can be planted in a direction perpendicular to the base, so that it is not time-consuming to plant the hairs.

  In addition, when the head axis is provided so as to be inclined in the direction of the hair tip at an angle of 7 to 27 degrees with respect to the gripping part axis, when the inside of the tooth is polished, the hair tip is surely applied to the inside of the tooth. In addition, it is possible to brush the inside of the teeth well without causing the hand holding the gripping part to hit the face.

  Furthermore, when the head axis is provided so as to incline in the opposite direction to the hair tip at an angle of 113 to 138 degrees with respect to the gripping portion axis line, when brushing the outside of the tooth, the hair tip is placed outside the tooth. It is possible to make sure that it is in contact with each other, and it is possible to brush the outside of the teeth well without causing the hand holding the gripping part to hit the face.

  According to the toothbrush according to the present invention, it is possible to satisfactorily polish the inside and outside of the teeth with a single toothbrush.

Example 1
Embodiments of the toothbrush of the present invention will be described in detail with reference to the accompanying drawings. 1 is a side view of a state in which the hair tip is directed toward the gripping portion, FIG. 2 is a front view in the state of FIG. 1, and FIG. 3 is a side view of the hair tip directed to the side opposite to the gripping portion. FIG. 4 is a front view in the state of FIG. 3.
The toothbrush 30 has a handle 31 and a head 32 on which a plurality of bristles 33 are arranged. The handle 31 in this embodiment includes a grip portion 34 that is a portion gripped by a hand, and a connecting portion 36 that connects the grip portion 34 and the head 32.

The connecting portion 36 is provided with an inclined portion 36 a extending from the tip end portion 34 a of the grip portion 34 to the head 32 so as to be inclined obliquely from the direction of the grip portion axis A extending in the longitudinal direction of the grip portion 34, and the head 32. And a head mounting portion 36b.
In the present embodiment, the inclined portion 36a extends in a direction inclined with respect to the gripping portion axis A while drawing a slight curve. The head attachment portion 36b is provided at the tip of the inclined portion 36a at an angle such that the head axis B extending in the longitudinal direction of the head 32 is at a predetermined angle with respect to the gripping portion axis A extending in the longitudinal direction of the gripping portion 34. ing.

The head 32 is configured by planting a plurality of hairs 33 on a base 39 that is a slightly vertically long octagon.
The head 32 is attached to the head attachment portion 36b so as to be rotatable about a head axis B extending in the longitudinal direction of the base portion 39.
The head 32 is attached to the head attachment portion 36b by attaching a rod-like attachment rotation shaft 40 protruding from the base portion 39 of the head 32 in the head axis B direction to a rotation shaft formed at a predetermined position of the head attachment portion 36b. It is preferable to press fit into a hole (not shown). Thereby, the head 32 can be rotated steplessly with respect to the head mounting portion 36b, and can be prevented from easily moving from the rotated position by press-fitting.

  Further, the head 32 is separated from the gripping part axis A by a distance h in the direction in which the mounting rotation shaft 40 is orthogonal to the gripping part axis A, and the head axis B is at a predetermined angle in the range of 0 to 25 degrees with respect to the gripping part axis A. It is provided to be θ. In this embodiment, the distance h between the mounting rotation shaft 40 of the head 32 and the gripping part axis A is about 1 to 2 cm, and the angle of the head axis B with respect to the gripping part axis A is about 20 degrees.

Thus, by providing the head 32 at a position away from the gripping part axis A so as to be rotatable about the head axis B, the direction of the hair tip of the head 32 can be in various directions with respect to the handle 31. Configured to face.
Specifically, the direction of the bristles of the head 32 can be switched depending on whether it is directed toward the gripping part axis A side of the handle 31 or in the direction opposite to the gripping part axis A.

  Further, since the head 32 and the gripping portion 34 are arranged with a predetermined distance h so that the head axis B and the gripping portion axis A are not located on the same straight line, for example, the head 32 is placed on the inside of the tooth. When this occurs, the gripping part 34 goes out of the mouth by a predetermined distance h. Therefore, even when the inside of the teeth is polished, the gripping portion 34 is not obstructed by the teeth and lips, and the user can easily grip.

Furthermore, since the head axis B of the head 32 has a predetermined angle θ in the range of 0 degrees (parallel) to 25 degrees with the grip section axis A, when the user grips the grip section 34 and moves the toothbrush 30. The head moves at an angle of 25 degrees from the parallel direction.
For this reason, the entire toothbrush 30 is longitudinally coupled with the fact that the head 32 is provided so as to be rotatable about the head axis B as described above and the head 32 and the gripping portion 34 are arranged at a predetermined distance h. When it is placed in the (vertical direction) and moved up and down for vertical brushing, it is possible to remove dirt and plaque on both the inside and outside of the teeth.

Next, the arrangement of the hairs 33 in the head 32 will be described.
The bristles 33 are provided with a plurality of rows of bristles 33, 42, 42,... Extending in the width direction of the head 32 at a predetermined distance along the longitudinal direction.
Further, when the head 32 is viewed from the direction of the head axis B, the length of the bristles 33 is formed such that the center of the head 32 is long and both ends in the width direction of the head 32 are short. Further, when the head 32 is viewed from the side, the length of the hair is formed so that the center of the head 32 is longer and the front end portion and the rear end portion in the longitudinal direction of the head 32 are shorter. That is, the hair 33 of the head 32 has a mountain shape that protrudes from the center of the head 32.

  As described above, since the bristles 33 are the longest at the center of the head 32, the longest portion of the bristles 33 can easily enter between the teeth, especially when vertical polishing is performed. It becomes easy to remove plaque.

Next, based on FIG. 5 and FIG. 6, the Example of the usage method of the toothbrush 30 concerning a present Example is described.
First, when brushing the outside of the teeth 55, the head 32 is rotated around the head axis B so that the hair tip of the head 32 faces in the direction opposite to the gripping part axis A side as shown in FIG. Thereafter, the holding part 34 is held by hand, the handle 31 is moved vertically with the handle 31 moved vertically (arrow C), and the teeth 55 are brushed vertically.

When brushing the inside of the teeth 55, as shown in FIG. 6, the head 32 is rotated around the head axis B so that the bristles of the head 32 face the grip portion axis A side. Thereafter, the grasping portion 34 is held by hand, the handle 31 is moved in the vertical direction, the hand is moved up and down (arrow C), and the teeth are brushed in the vertical direction.
In this way, by using the toothbrush 30 of the present invention, it is possible to comfortably brush both the inside and the outside of the tooth 55 even when vertically brushing.

(Example 2)
Next, another embodiment of the present invention will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected about the component same as the Example mentioned above, and description may be abbreviate | omitted.
In the above-described embodiment, the grip portion axis A and the head axis B have an angle of about 20 degrees, but in this embodiment, the angle between the grip portion axis A and the head axis B is 0 degrees. That is, they are parallel.

The head 32 is attached to the head attachment portion 36b so as to be rotatable about the head axis B. Further, since the head attachment portion 36b is attached perpendicularly to the grip portion axis A, the head attachment portion 36b is provided on the inclined portion 36a so as to be perpendicular to the grip portion axis A. The mounting structure of the head mounting portion 36b of the head 32 is similar to the first embodiment in that a rod-shaped mounting rotating shaft 40 protruding from the base portion 39 of the head 32 in the head axis B direction is bored at a predetermined position of the head mounting portion 36b. It is preferable to press-fit into a rotation shaft hole (not shown) provided.
7, the direction of the hair tip of the head 32 is directed to the gripping part axis A side of the handle 31, and in FIG. 8, the direction of the hair tip of the head 32 is directed to the opposite direction to the gripping part axis A side. It has been.

Further, the head 32 and the grip portion 34 are arranged with a predetermined distance h so that the head axis B and the grip portion axis A are not located on the same straight line.
The distance h in the present embodiment is provided to be longer than the distance h in the first embodiment, and an interval of about 3 cm to 4 cm is provided. That is, when the head axis B is provided so as to be parallel to the gripping part axis A as in the present embodiment, the head 32 is more distant from the gripping part 34 than in the first embodiment. However, particularly when the inside of the teeth is polished, the gripping portion 34 does not obstruct the teeth, and the hair 33 of the head 32 easily comes into contact with the teeth.

  The toothbrush 30 in the present embodiment can also employ the same usage method as the toothbrush 30 in the first embodiment, and when the head 32 is adjusted so that the bristles of the head 32 are directed toward the gripping portion axis A, the tooth Used when brushing the inside, and when adjusting the orientation of the head 32 so that the hair tip of the head 32 faces in the direction opposite to the gripping part axis A side, it is used when brushing the outside of the teeth.

(Example 3)
Another embodiment will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected about the component same as the component in the Example mentioned above, and description may be abbreviate | omitted.
In the toothbrush 30 of the present embodiment, unlike the embodiments described above, the direction of the head 32 with respect to the gripping portion axis A is adjusted not in the head axis toward the longitudinal direction of the head 32 but in the direction orthogonal to the head axis. A configuration is adopted in which the head can be rotated about a head width direction axis D (see FIG. 12) that extends in the width direction of the head.
Further, the connecting portion 36 that connects the grip portion 34 and the head 32 is provided at the tip end portion 34a of the grip portion 34 so as to be rotatable about an axis orthogonal to the grip portion axis A direction.

  Thus, in the toothbrush 30 of the present embodiment, the head 32, the connecting portion 36, and the handle 31 are in a straight line (FIG. 9: the longitudinal direction of the head, the axial direction of the connecting portion, and the axial direction of the handle are on the same straight line. The head 32 is directed toward the gripping part axis A, and the head is positioned at a distance of a predetermined distance h from the head axis B and the gripping part axis A (FIG. 10). And the direction of the hair tip of the head 32 is opposite to the gripping part axis A side, and the head is positioned at a distance of a predetermined distance h from the head axis B and the gripping part axis A (FIG. 11). The form can be changed.

  In FIGS. 10 and 11, the gripping portion 34 and the connecting portion 36 are at an angle that is orthogonal to each other. However, since the connecting portion 36 is rotatable with respect to the gripping portion 34, the gripping portion 34 and the connecting portion 36. Various angles can be adopted. For this reason, the distance h between the head axis B and the gripper axis A can be adjusted according to the size of each user's mouth.

A specific structure of the connecting portion 36 will be described with reference to FIGS.
A connection hole 44 extending in the width direction of the head 32 for connecting the connection portion 36 is formed in the rear end portion (on the connection portion 36 side) of the head 32. Further, a connecting hole 46 for connecting the connecting portion 36 is also formed in the distal end portion 34 a of the grip portion 34.

The connecting portion 36 is formed in an approximately H shape, and has two arm portions 48, 48 and a base portion 50 that connects both arm portions 48.
At both ends of each arm portion 48, projections 52 that protrude toward the facing arm portion 48 are formed. Opposing protrusions 52 are inserted into both sides of the connection hole 44 of the head 32 and both sides of the connection hole 46 of the grip portion 34.

Further, biasing means 54 for biasing the arm portions 48 in a direction approaching each other is provided. The urging means 54 is provided near both end portions of the both arm portions 48, and acts so that the protrusions 52, 52 provided on each arm portion 48 and arranged to face each other are brought close to each other. In other words, the urging means 54 has a function of preventing the protrusion 52 from coming out of the connection holes 44 and 46 after the protrusion 52 is inserted into the connection holes 44 and 46. .
In this embodiment, a spring is employed as the biasing means 54, but the present invention is not limited to this.

  In this way, the connecting portion 36 fits the protrusions 52 urged in the opposite directions into the connecting holes 44 and 46 of the head 32 and the gripping portion 34. If the arm portions 48 are spread against each other, the head 32, the coupling portion 36, and the grip portion 34 can be easily disassembled. For this reason, when the hair 33 of the head 32 spreads or becomes dirty, it is possible to replace only the head 32 with a new one while leaving the handle 31 (the connecting portion 36 and the gripping portion 34) intact.

  The toothbrush 30 of the present embodiment is preferably in a state where the head 32, the connecting portion 36, and the gripping portion 34 are in a straight line when stored or carried, and the head 32 is arranged so that the hair tip of the head 32 faces the gripping portion axis A side. Is used when brushing the inside of the teeth when adjusting the direction of the head, and when adjusting the direction of the head 32 so that the hair tip of the head 32 faces in the direction opposite to the gripping axis A side, the outside of the teeth It is recommended to use it when polishing.

  In addition, although the shape of the base 39 of the head 32 in each Example mentioned above was an octagonal thing, it is not limited to such a shape.

Example 4
Example 4 will be described with reference to FIGS.
In addition, the same code | symbol is attached | subjected about the component same as the component in the Example mentioned above, and description may be abbreviate | omitted.
The toothbrush 30 of the present embodiment employs a configuration in which the head 32 is rotated in two stages around a head width direction axis D that extends in the head width direction, which is a direction orthogonal to the head axis. By changing the inclination of the head 32 with respect to the gripping part axis A of the gripping part 34 in two stages, when polishing the outside of the tooth and when polishing the inside of the tooth, especially when performing vertical polishing This is intended to improve the contact condition of the hair 33.

The connecting portion 36 is provided such that the connecting portion axis E is inclined with respect to the gripping portion axis A by an angle α (about 20 degrees) in the direction opposite to the hair tip. The head 32 has the head axis B (B1). A position (position 1) where each β (about 45 degrees) is inclined with respect to the connecting portion axis E in the direction of the hair tip, and the head axis B (B2) is γ (about 37) with respect to the connecting portion axis E. The angle can be adjusted in two stages, that is, a position (position 2) that is tilted in the opposite direction to the hair tip. For this reason, at position 1, the head axis B1 is arranged at an angle inclined about 17 degrees in the direction of the hair tip with respect to the gripping portion axis A, and at position 2, the head axis B2 is in the direction opposite to the tip of the hair with respect to the gripping portion axis A. Arranged at an angle of about 123 degrees. However, these angles are considered to have an allowable range of about plus or minus 10 degrees due to individual differences.
However, the present invention is not limited to these angles.

  Since the connecting portion 36 is provided obliquely in a direction opposite to the direction of the hair tip from the gripping portion axis A direction extending in the longitudinal direction of the gripping portion 34 from the distal end portion 34a of the gripping portion 34 to the head 32, The position of the shaft 62, which is the center of rotation of the head 32, and the grip portion axis A are separated by a distance h, specifically, the distance is set to about 6 mm.

  The bristles 33 planted in the base portion 39 of the head 32 are disposed obliquely toward the center in the head longitudinal direction. Specifically, both end portions in the longitudinal direction of the head are curved in the direction of the hair tips, whereby the hair is arranged toward the center in the longitudinal direction.

A connection structure between the connection portion 36 and the head 32 will be described.
Two projections 60 projecting to the head side are formed at the tip of the coupling part 36. Both projecting portions 60 are formed with insertion holes 64 through which the projecting portions 60 communicate and the shaft 62 serving as the rotation center of the head 32 is inserted. The insertion hole 64 is formed so as to be directed in the width direction of the head 32 so that the shaft 62 becomes the rotation center of the head 32.

  Two concave grooves 66 a and 66 b are formed in the respective projecting portions 60 at the tip portions of both projecting portions 60. The two concave grooves 66a and 66b in each projection 60 are fitted with a cylindrical member (insertion shaft 68 described later) extending in the width direction of the head 32 across the concave grooves 66a and 66b of each projection 60. As described above, the protrusion 60 is formed in a semicircular cross section in the width direction.

  On the other hand, at the end of the head 32 on the side of the connecting portion, there is an insertion hole 67 that protrudes toward the connecting portion at a position where it enters between the two protrusions 60 of the connecting portion 36 and into which the shaft 62 can be inserted. The formed head protrusion 70 is formed.

On both sides of the head projection 70 of the head 32, recesses 72, 72 into which the projection 60 of the connecting portion 36 can respectively enter are provided.
In addition, stopper portions 74 and 74 having stopper surfaces that come into contact with the surface of the connecting portion 36 are provided outside the concave portions 72 and 72.

  On the bottom surface of the concave portion 72, an insertion shaft 68 is provided which is fitted into the concave grooves 66a and 66b at the tip of the projection portion 36 when the projection portion 60 of the connecting portion 36 enters. The fitting shaft 68 is a columnar member, and is disposed in an insertion hole 75 formed along the width direction of the head 32 at the end of the coupling portion side of the head 32. The insertion hole 75 is partially cut away, and the insertion shaft 68 is exposed in the recess 72 at the cut-out portion, and the recessed groove 66a formed at the tip of the projection 60 of the connecting portion 30 is formed. 66b.

The insertion shaft 68 is urged by the urging member 78 toward the connecting portion in the insertion hole 75. Here, as an urging means, a cylindrical urging member 78 having a cross-section gourd shape that is compressed in the direction of the connecting portion and inserted into the insertion hole 75 together with the fitting shaft 68 is employed.
Since it is difficult to insert the insertion shaft 68 and the biasing member 78 into the insertion hole 75 at the same time, the biasing member 78 is first disposed in the insertion hole 75, and then the insertion shaft 68 is inserted into the insertion hole 75. 75 may be inserted. In this case, the insertion shaft 68 can be easily inserted by sharpening the tip of the insertion shaft 68.

  When the connecting portion 30 and the head 32 are connected, the head 32 can rotate about the shaft 62, and the insertion shaft 68 is urged and inserted into the concave groove 66a or 66b of the connecting portion 36. Thus, the head 32 is fixed at a position where the insertion shaft 68 is inserted into the concave groove 66a or 66b. When the angle of the head 32 is to be changed, the head 32 is pressed in a predetermined direction against the urging force of the urging member 78 so as to move the position of the fitting shaft 68 into the other groove 66a or 66b. Can be done.

When the head 32 is at the position 1, the insertion shaft 68 is fitted in the concave groove 66 a, but the stopper portion 74 of the head 32 has a surface 80 on the concave groove 66 a side (hair end side) of the connecting portion 36. The head 32 is fixed so as not to be detached from the concave groove 66a and to turn to the hair tip side.
Further, when the head 32 is at the position 2, the fitting shaft 68 is fitted into the concave groove 66b, but the stopper portion 74 of the head 32 is located on the concave groove 66b side (opposite to the hair tip) of the connecting portion 36. By abutting against the surface 82, the head 32 is fixed so as not to be detached from the concave groove 66b and to rotate to the opposite side to the hair tip.

  Note that the urging member is not limited to the above-described example, and the hook shaft 84 itself that is used by hooking the fitting shaft 68 to the connecting portion 36 is also used as a hook-like member 84 that is always working to contract. Good. By providing the hook-shaped member 84 between the head 32 and the connecting portion 36, a force is applied so that the head 32 and the connecting portion 36 are in close contact with each other, and the fitting shaft 68 (the hook-shaped member 84 itself) is recessed. It can be inserted into the grooves 66a and 66b (see FIG. 20).

Next, a method of actually brushing teeth by vertical brushing using the toothbrush of Example 4 described above will be described.
FIG. 21 shows a case where the outside of the lower front tooth is polished. At this time, the head 32 is set at the position 2 and used at a position where the angle of the head axis becomes larger than the axis of the gripping portion. In the following, when the outside of the teeth is polished, the head 32 is in position 2.
FIG. 22 shows a case where the outside of the upper front teeth is polished.
FIG. 23 shows a case where the outside of the lower back teeth is polished.
FIG. 24 shows a case where the outer side of the upper back teeth is polished.
FIG. 25 shows a case where the inner side of the lower front tooth is polished. At this time, the head 32 is set to the position 1 and used at a position where the angle of the head axis becomes smaller than the gripping part axis. In the following, when the inside of the teeth is polished, the head 32 is in position 2.
FIG. 26 shows a case where the inside of the upper front tooth is polished.
FIG. 27 shows a case where the inner side of the lower back tooth is polished.
FIG. 28 shows a case where the inner side of the upper back teeth is polished.

As shown in each figure, the user has a grip 34 so that the entire toothbrush 30 is in the vertical direction. The user holds the grip portion so that the grip portion 34 faces downward when brushing the upper teeth and the grip portion 34 faces upward when brushing the lower teeth.
The user may brush the teeth one by one while looking at the mirror and confirming that the hair 33 is in contact with the teeth. When brushing, apply bristles 33 perpendicular to the tooth surface and move them in the direction of the gums little by little. When the tip of bristles 33 reaches the boundary between the teeth and gums, apply a little force and push the bristles onto the teeth. Slide up and down while touching.

As a point when using the toothbrush 30 of the present embodiment, it is important to polish the hair so as not to move so much. If only the base portion 39 of the head 32 is moved up and down and polished, the hair 33 bends, and the force applied to the tip of the hair 33 can sufficiently wash the teeth and massage the gums.
Furthermore, if the bristles 33 are polished at an angle that hits the entire tooth, the tooth surface can be polished cleanly.
In the case of brushing between teeth, the front end side of the head 32 is placed at the boundary between the teeth and the gums, and the connecting portion side of the head 32 is slightly separated from the teeth, so that the hair 33 on the front end side of the head 32 is connected to the teeth Since it enters the gap between teeth, the gap between teeth can be polished well.

  Thus, since the angle of the head 32 is switched between when the inner side of the tooth is brushed and when the outer side of the tooth is brushed using the toothbrush 30 of the fourth embodiment, all the teeth are cleaned by vertical brushing with one toothbrush. It became possible to polish.

In Example 4, the angle of the head 32 is switched between when the inside of the tooth is polished and when the outside of the tooth is polished.
However, the present invention may be a toothbrush that does not rotate because the angle of the head 32 is fixed at the position 1, or a toothbrush that does not rotate because the angle of the head 32 is fixed at the position 2. In such a case, two toothbrushes may be used in combination, and the two toothbrushes may be used properly when brushing the inside of the tooth and when brushing the outside of the tooth.

  As for the size of a general adult toothbrush in Example 4, the total length including the head should be around 16 cm, and the length in the longitudinal direction of the head 32 should be around 1.5 cm. The length is not limited.

  Although the present invention has been described in detail with reference to preferred embodiments, the present invention is not limited to these embodiments, and it goes without saying that many modifications can be made without departing from the spirit of the invention. .

In Example 1 of the toothbrush of this invention, it is a side view which shows the state which orient | assigned the hair tip of the head to the holding part axis line side. In Example 1, it is a front view which shows the state which orient | assigned the hair | bristle head of the head to the holding part axis line side. In Example 1, it is a side view which shows the state which orient | assigned the hair tip of the head to the direction opposite to the holding part axis line side. In Example 1, it is a rear view which shows the state which orient | assigned the hair end of the head to the direction opposite to the holding part axis line side. In Example 1, it is explanatory drawing which shows the usage example in the case of brushing the outer side of a tooth | gear. In Example 1, it is explanatory drawing which shows the usage example in the case of brushing the inner side of a tooth | gear. In Example 2, it is a side view which shows the state which orient | assigned the hair tip of the head to the holding part axis line side. In Example 2, it is a side view which shows the state which orient | assigned the hair tip of the head to the direction opposite to the holding part axis line side. In Example 3, it is a side view which shows the state from a handle | steering-wheel to a head in a straight line. In Example 3, it is a side view which shows the state which orient | assigned the hair end of the head to the holding part axis line side. In Example 3, it is a side view which shows the state which orient | assigned the hair end of the head to the direction opposite to the holding part axis line side. In Example 3, it is a perspective view which shows the state which orient | assigned the hair end of the head to the holding part axis line side. In Example 3, it is an assembly exploded view which shows the structure of a connection part. In Example 4, it is a perspective view which shows the state which inclined the head to the hair tip direction. In Example 4, it is a perspective view which shows the state which inclined the head to the direction opposite to a hair tip. FIG. 10 is a side view in Example 4. FIG. 17 is an enlarged view showing how the head of FIG. 16 operates. It is an assembly exploded view showing the place where the head and the handle are separated. It is an enlarged view of FIG. It is a front view which shows the other example of a fitting shaft. It is explanatory drawing at the time of brushing the outer side of a lower front tooth using the toothbrush of Example 4. FIG. It is explanatory drawing at the time of brushing the outer side of the upper front tooth using the toothbrush of Example 4. FIG. It is explanatory drawing at the time of brushing the outer side of a lower back tooth using the toothbrush of Example 4. FIG. It is explanatory drawing at the time of brushing the outer side of the upper back tooth using the toothbrush of Example 4. FIG. It is explanatory drawing at the time of brushing the inner side of a lower front tooth using the toothbrush of Example 4. FIG. It is explanatory drawing at the time of brushing the inner side of the upper front tooth using the toothbrush of Example 4. FIG. It is explanatory drawing at the time of brushing the inner side of a lower back tooth using the toothbrush of Example 4. FIG. It is explanatory drawing at the time of brushing the inner side of the upper back tooth using the toothbrush of Example 4. FIG. It is explanatory drawing explaining vertical polishing.

Explanation of symbols

30 Toothbrush 31 Handle 32 Head 33 Bristle 34 Grasping part 34a Tip part 36 Connection part 36a Inclined part 36b Head attachment part 39 Base 40 Attachment rotation shaft 42 Row of hairs 44, 46 Connection hole 48 Arm part 50 Base part 52 Protrusion part 54 Energizing means 60 Protruding portion 62 Shaft 64 Insertion holes 66a, 66b Concave groove 67 Insertion hole 68 Insert shaft 70 Head projection 72 Recess 74 Stopper portion 75 Insertion hole 78 Energizing members 80, 82 Surface 84 Hook-shaped member A Gripping Part axis B Head axis D Head width direction axis E Connection part axis

Claims (13)

A handle having a gripping portion;
In a toothbrush comprising a head having a plurality of bristles planted on the base,
In the handle,
The gripping part axis extending in the longitudinal direction of the gripping part and the handle side end of the head are separated from the tip of the gripping part in an oblique direction with respect to the gripping part axial direction so as to be separated from each other by a predetermined distance; A toothbrush comprising a connecting portion for connecting the head so that the head axis is at a predetermined angle with respect to the gripping portion axis. The head is
The toothbrush according to claim 1, wherein the toothbrush is attached to the connecting portion so as to be rotatable about a head width direction axis extending in the width direction of the head.   The toothbrush according to claim 2, wherein the toothbrush is provided so as to be fixed at a predetermined position when the head is rotated about the axis in the head width direction. At the tip of the connecting part,
Protrusions that project in the direction of the head and that are formed with insertion holes into which the shaft that is the center of rotation of the head can be inserted are provided,
A plurality of concave grooves are provided at the tip of the projection according to the position when the head is rotated,
An insertion hole into which the shaft can be inserted is formed at the end of the head on the connecting portion side, and a head protrusion that is connected to the connecting portion via the shaft is fitted into the concave groove. An insertion portion, and an urging means for urging the insertion portion in the direction of the groove,
The toothbrush according to claim 3, wherein the head is fixed at a position where the insertion portion is inserted into any of the concave grooves. The connecting portion is
Provided so as to connect the grip part and the head so that the head axis is at an angle of 0 to 25 degrees with respect to the grip part axis;
The head is provided at the tip so as to be adjustable so that the hair tip of the head faces either the grip part axis line side or the opposite side of the grip part axis line. The toothbrush according to 1.   The toothbrush according to claim 5, wherein the head is provided in the connecting portion so as to be rotatable about the head axis. The head is
The toothbrush according to claim 5, wherein the toothbrush is provided at a distal end portion of the coupling portion so as to be rotatable about a head width direction axis extending in the width direction of the head.   The connecting portion is provided in the gripping portion so as to be rotatable so that a connecting portion axis extending in a longitudinal direction of the connecting portion is positioned on the same straight line as the gripping portion axis. The toothbrush described.   9. The hair of the head is formed in a mountain shape so that the length of the hair at the center is long in both the longitudinal direction and the width direction of the head. The toothbrush of any one of Claims. The hair of the head is
The toothbrush according to any one of claims 1 to 8, wherein the bristles are arranged obliquely so as to go to the longitudinal center of the head when viewed from the side of the head. The head bristles are each planted vertically to the base,
Since both ends of the head in the longitudinal direction are formed with curved bases so that the hairs extend in the direction in which the hairs extend, the hairs are arranged obliquely toward the center in the longitudinal direction of the head. The toothbrush according to claim 10, wherein:   The toothbrush according to claim 1, wherein the head axis is provided so as to be inclined in the direction of the hair tip at an angle of 7 to 27 degrees with respect to the gripping part axis.   The toothbrush according to claim 1, wherein the head axis is provided so as to be inclined in the direction opposite to the hair tip at an angle of 113 to 138 degrees with respect to the gripping part axis.

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