WO2022105144A1

WO2022105144A1 - Toothbrush

Info

Publication number: WO2022105144A1
Application number: PCT/CN2021/092430
Authority: WO
Inventors: 徐振武; 戴晓国; 张常进; 张红涛
Original assignee: 上海携福电器有限公司
Priority date: 2020-11-18
Filing date: 2021-05-08
Publication date: 2022-05-27
Also published as: CN213785933U

Abstract

A toothbrush, comprising: a handle (10), which is vertically placed and has a long side thereof that extends in a vertical direction; a brush head (20), comprising a brush rod (21) and bristles (22) arranged on the brush rod (21), wherein the brush head (20) is rotatably connected to the handle (10) around an axis of rotation (C), the axis of rotation (C) is perpendicular to the extension direction of the handle (10) and is parallel or perpendicular to the extension direction of the bristles (20), and the bristles (22) have an initial position above the handle (10) and can rotate with the brush head (20) to deviate from the initial position; and an elastic member (30), which connects the brush head (20) and the handle (10), elastically deforms when the bristles (22) deviate from the initial position, and can drive the bristles (22) to return to the initial position after an external force disappears.

Description

toothbrush

This application claims the priority of the Chinese patent application with the application number 202022677539.4 and the invention name "toothbrush", which was filed in the China Patent Office on November 18, 2020, the entire contents of which are incorporated into this application by reference.

technical field

The present application relates to the field of oral care, and in particular, to a toothbrush.

Background technique

When the toothbrush is in use, the force of the toothbrush to clean the teeth comes from the pressing and pushing force of the human hand. When brushing teeth, the user may unknowingly increase the pressing force of the hand due to the desire for better cleaning effect, so that the teeth are subjected to a pressing force that exceeds the cleaning requirement, and the pressing force may cause abrasion of the enamel. The neck of the tooth (where the teeth and gums meet), where this pressure is more likely to cause discomfort and damage.

technical problem

One of the purposes of the embodiments of the present application is to improve the situation that the teeth are damaged due to too forceful brushing.

technical solutions

In order to solve the above-mentioned technical problems, the technical solutions adopted in the embodiments of the present application are:

A toothbrush comprising:

The handle is placed vertically and its long side is extended up and down;

A brush head, comprising a brush rod and bristles arranged on the brush rod, the brush head and the handle are rotatably connected around a rotation axis, the rotation axis is perpendicular to the extension direction of the handle, and is parallel or perpendicular to the an extension direction of the bristles, the bristles have an initial position above the handle and can deviate from the initial position as the brush head rotates;

The elastic part connects the brush head and the handle, and is elastically deformed when the bristles deviate from the initial position, and can drive the bristles to return to the initial position after the external force disappears.

Optionally, the elastic member is in the shape of a strip, and two ends of the elastic member are respectively connected to the brush rod and the handle, and the elastic member is elastically bent when the bristles deviate from the initial position.

Optionally, a surface of the handle facing the brush head is provided with a first limit hole, and the brush rod has a second limit hole opposite to the first limit hole;

The elastic member is strip-shaped, and two ends of the elastic member are respectively inserted into the first limiting hole and the second limiting hole, and the elastic member elastically bends when the bristles deviate from the initial position.

Optionally, one end of the elastic member is in interference fit with the first limiting hole, and the other end is in clearance fit with the second limiting hole.

Optionally, both ends of the elastic member are respectively provided with an upper connection block and a lower connection block, the upper connection block is inserted into the second limit hole, and the lower connection block is connected to the first limit hole. Mate connection.

Optionally, the elastic member is in the shape of a strip, the cross-section of the elastic member is rectangular, and the long side of the cross-section is parallel to the rotation axis.

Optionally, the brush head is rotated so that the deviation angle of the bristles from the original position does not exceed 30 degrees.

Optionally, the toothbrush further includes a sensing structure for detecting the pressure of the brush head.

Optionally, the brush head and the handle are rotatably connected by a connecting assembly, and the connecting assembly includes a first lifting arm and a second lifting arm connecting the upper surface of the handle, and an adapter connecting the brush head. ;

The first lift arm has a first connection hole, the second lift arm has a second connection hole, and the connecting line between the first connection hole and the second connection hole is the rotation axis, and the adapter A first connection block that is inserted and matched with the first connection hole and a second connection block that is inserted and matched with the second connection hole are respectively provided on opposite sides thereof;

The adapter is provided with an escape hole for avoiding the elastic member.

Optionally, the elastic member is a metal strip.

beneficial effect

The toothbrush provided by the present application can improve the damage to the teeth due to too forceful brushing, and achieve the effect of protecting the teeth.

Description of drawings

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the accompanying drawings that are used in the description of the embodiments or exemplary technologies. Obviously, the drawings in the following description are only for the present application. In some embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

1 is a front view of a toothbrush provided by an embodiment of the present application;

Fig. 2 is the right side view of the structure of Fig. 1;

Fig. 3 is the sectional view at B-B place in Fig. 1;

FIG. 4 is a schematic diagram of disassembly of the toothbrush provided by the embodiment of the present application.

Among them, each reference sign in the figure:

10, handle; 20, brush head; 201, second limit hole; 30, elastic piece; 40, connection assembly; 41, first lift arm; 401, first connection hole; 42, second lift arm; 402, 43, an adapter; 441, a first connection block; 442, a second connection block; 403, an escape hole.

Embodiments of the present invention

In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.

It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or indirectly on the other component. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description, rather than indicating or implying the referred device Or the elements must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the present application, and those of ordinary skill in the art can understand the specific meanings of the above terms according to specific situations. The terms "first" and "second" are only used for convenience of description, and should not be understood as indicating or implying relative importance or implying indicating the number of technical features. "Plurality" means two or more, unless expressly specifically limited otherwise.

Referring to FIGS. 1 to 4 , an exemplary description of a toothbrush provided by the present application will now be given. The toothbrush includes a handle 10 , a brush head 20 and an elastic member 30 .

In the illustration, the toothbrush is placed vertically. The long side of the handle 10 is in a state of extending up and down. The handle 10 may be a cylindrical body of equal or non-equal cross-section.

The brush head 20 includes a brush rod 21 and bristles 22 provided on the brush rod 21. The brush head 20 and the handle 10 are rotatably connected around a rotation axis C, and the rotation axis C is perpendicular to the extension direction of the handle 10 and parallel or perpendicular to the extension of the bristles 22. direction.

The bristles 22 have an initial position above the handle 10 and can deviate from the initial position as the brush head 20 is rotated.

The elastic member 30 connects the brush head 20 and the handle 10, and is elastically deformed when the bristles 22 deviate from the initial position, and can drive the bristles 22 to return to the initial position after the external force disappears.

The brush head 20 is generally a symmetrical structure along the central axis. In the initial state, the central axis extends up and down, and the bristles 22 are located directly above the handle 10 . When the brush head 20 rotates about the rotation axis C, the brush head 20 is deflected to both sides so that the bristles 22 deviate from the initial position.

Combined with the brushing operation, when brushing the teeth, the toothbrush is generally placed horizontally, and the brush head 20 extends into the oral cavity laterally (the length direction of the toothbrush is parallel to the arrangement direction of the teeth), and sweeps the upper and lower rows of teeth longitudinally. It should be noted that the force acting on the teeth when brushing the teeth can be expressed as the static pressure of the bristles 22 on the teeth and the thrust force of the relative movement between the bristles 22 and the teeth.

When the pressure is too large, the brush head 20 rotates around the rotation axis C, and the elastic member 30 is elastically deformed, which offsets the influence of part of the force on the teeth, so that the actual pressure on the teeth is reduced.

The figures show the case where the axis of rotation C is perpendicular to the direction of extension of the bristles 22 . Please refer to FIGS. 1 and 2 , when the rotation axis C is perpendicular to the extending direction of the bristles 22 (not shown), when brushing the teeth, the bristles 22 face the teeth and press against the teeth. In the case of excessive static pressure, the brush head 20 Rotating in the direction away from the teeth, the elastic member 30 is elastically deformed to offset part of the pressure, so that the actual static pressure on the teeth is reduced, so as to achieve the effect of protecting the teeth.

When the rotation axis C is parallel to the extension direction of the bristles 22 (not shown), it is assumed that the toothbrush alternately sweeps the upper and lower rows of teeth from the middle with a fixed thrust, and the brush head 20 rotates in the opposite direction: the toothbrush moves upward. When brushing in the direction of the teeth, the brush head 20 rotates in the direction of the lower row of teeth. Correspondingly, when the toothbrush sweeps in the direction of the lower row of teeth, the brush head 20 rotates in the direction of the upper row of teeth. The elastic member 30 is elastically deformed to offset the partial thrust, so that the actual pressure on the teeth is reduced, and the effect of protecting the teeth is achieved. It should be noted that, since the deformation of the elastic member 30 has a linear relationship with the frictional force, when the toothbrush sweeps the upper and lower rows of teeth, the actual pressure on the teeth decreases from the crown to the gum, and the pressure on the gum is the smallest. , so as to further protect the gums.

From the above, the toothbrush provided by this embodiment can protect the teeth.

In another embodiment of the present application, the toothbrush further includes a sensing structure for detecting the pressure of the brush head 20 . The sensing structure senses the pressure on the brush head 20 , and when the sensed pressure is greater than the set threshold, sends out an alarm signal by means of visible light or sound, so as to remind the user to appropriately reduce the pressure applied to the toothbrush.

Referring to FIG. 3 , in another embodiment of the present application, the elastic member 30 is a strip, and the two ends of the elastic member 30 are respectively connected to the brush rod 21 and the handle 10 . The elastic member 30 elastically bends when the bristles 22 deviate from the initial position.

The connection between the elastic member 30 and the brush rod 21 and the handle 10 may be a fixed connection or a movable connection, as long as the elastic member 30 can be bent with the rotation of the brush head 20 .

The elastic member 30 is in the shape of a strip, and the elastic member 30 itself can be bent at any angle, left, right, front or rear. Therefore, the rotation direction of the brush head 20 is only restricted by the connection between the brush head 20 and the handle 10 , and is not affected by the elastic member 30 .

It should be noted that the strip shape refers to a structural member with slender features, and the elastic member 30 may extend linearly, wavy forward, or spirally forward in the longitudinal direction. As long as its two ends are respectively connected with the brush rod 21 and the handle 10 and can bear torsional moment to produce elastic bending.

In other embodiments, the elastic member 30 may also be an annular shape extending up and down, the upper and lower surfaces of which are connected to or abut against the brush rod 21 and the handle 10 respectively. The elastic member 30 is hollow to avoid the connection between the brush rod 21 and the handle 10 . When the brush head 20 and the handle 10 are rotated, the elastic member 30 is compressed, and after the external force disappears, the elastic restoring force of the elastic member 30 drives the brush head 20 to reversely rotate and reset.

Referring to FIG. 3 , in another embodiment of the present application, the handle 10 is provided with a first limit hole on the surface facing the brush head 20 , and the brush rod 21 has a second limit hole 201 opposite to the first limit hole;

The elastic member 30 is strip-shaped, and two ends of the elastic member 30 are inserted into the first limiting hole and the second limiting hole 201 respectively. The elastic member 30 is elastically bent when the bristles 22 deviate from the initial position.

Both the first limiting hole and the second limiting hole 201 have a certain depth. The first limiting hole is for inserting the elastic member 30 and restricts the movement of the lower end of the elastic member 30 in the horizontal direction, and the second limiting hole 201 is for inserting the upper end of the elastic member 30 and restricts the upper end of the elastic member 30 when the brush head 20 rotates The part is away from the second limiting hole 201 , so as to realize the bending of the elastic member 30 .

The lower end of the elastic member 30 is in an interference fit with the first limiting hole, so as to improve the connection stability of the elastic member 30 and the handle 10 and reduce the risk of the elastic member 30 breaking away from the first limiting hole. The upper end of the elastic member 30 is in clearance fit with the second limiting hole 201 . The upper end of the elastic member 30 and the second limiting hole 201 can move relative to each other, so that when the elastic member 30 is bent, it is only bent by radial pressure, and will not be subjected to axial tension. This arrangement is beneficial to improve the service life of the elastic member 30 .

In the structure shown in FIG. 3 , both ends of the elastic member 30 are respectively provided with an upper connecting block 31 and a lower connecting block 32 , the upper connecting block 31 is inserted into the second limiting hole 201 , and the lower connecting block 32 is matched with the first limiting hole connect. The lower end of the elastic member 30 is inserted into the lower connecting block 32 and is fixedly connected with the handle 10 by the lower connecting block 32 . The first limiting hole is a special-shaped hole and restricts the rotation of the lower connecting block 32 . The arrangement of the upper connecting block 31 and the lower connecting block 32 prevents the elastic member 30 from directly pressing the handle 10 or the brush rod 21 and causing damage to the handle 10 or the brush rod 21 .

In another embodiment of the present application, please refer to FIG. 4 , the cross-section of the elastic member 30 is rectangular, and the long side of the cross-section is parallel to the rotation axis C. As shown in FIG. Among the three-dimensional dimensions of the elastic member 30, the dimension (thickness) in the direction perpendicular to the rotation axis C is the smallest. This setting can improve the ease of bending of the elastic member 30 and reduce the deformation amount of the surfaces on both sides along the thickness direction during bending. Local internal stress of the structure.

In this embodiment, the elastic member 30 is a metal strip. In other embodiments, the elastic member 30 can also be selected from elastic plastic or other materials, which is not limited herein.

In another embodiment of the present application, please refer to FIG. 1 , the brush rod 21 and the handle 10 are rotatably connected by a connecting assembly 40 , and the connecting assembly 40 includes a first lifting arm 41 and a second lifting arm 42 connected to the upper surface of the handle 10 , and The adapter 43 connecting the brush bar 21; the first lifting arm 41 has a first connecting hole 401, the second lifting arm 42 has a second connecting hole 402, and the connecting line between the first connecting hole 401 and the second connecting hole 402 is the axis of rotation C. On the opposite sides of the adapter 43 , a first connection block 441 that is inserted and matched with the first connection hole 401 and a second connection block 442 that is inserted and matched with the second connection hole 402 are respectively provided.

The first lifting arm 41 and the second lifting wall provide support for the adapter 43, and realize the rotational connection with the adapter 43 by means of openings and inserts. The first connecting block 441 and the second connecting block 442 together form the rotation axis of the brush head 20 and the handle 10 , and are arranged on opposite sides of the adapter 43 to avoid interference with the elastic member 30 .

In other embodiments, the first connection hole 401 and the second connection hole 402 can also be opened in the adapter 43 , and the first connection block 441 and the second connection block 442 are respectively formed in the first lift arm 41 and the second lift arm 42 on.

It can be understood that there is a space between the first lifting arm 41 and the second lifting arm 42 to avoid the rotation of the adapter 43 . The adapter 43 is located between the first lift arm 41 and the second lift arm 42 , and has an escape hole 403 for avoiding the elastic member 30 . The elastic member 30 is inserted into the second limiting hole 201 through the avoidance hole 403 .

The brush head 20 extends into the oral cavity to brush the teeth, limited by the range of motion, the rotation angle of the brush head 20 should not be too large to avoid the inconvenience of the brushing operation. Preferably, when the brush head 20 is rotated, the deviation angle of the bristles 22 from the original position does not exceed 30 degrees. The deviation angle is the angle formed by the connection line between the original position and the rotation axis C and the connection line between the maximum deviation position and the rotation axis C. The deflection angle is also not easy to be too small, and the deflection angle limits the rotation angle of the brush head 20, thereby limiting the deformation space of the elastic member 30, thereby affecting the protection effect of the teeth. The deflection angle is more preferably [5°-25°]. Those skilled in the art can specifically set the deflection angle as 5°, 8°, 10°, 12°, 15°, 18°, 20°, 21°, 22°, 25°, etc., which is not limited herein.

The above descriptions are only preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present application shall be included in the protection of the present application. within the range.

Claims

A toothbrush comprising:

The handle is placed vertically and its long side is extended up and down;

A brush head, comprising a brush rod and bristles arranged on the brush rod, the brush head and the handle are rotatably connected around a rotation axis, the rotation axis is perpendicular to the extension direction of the handle, and is parallel or perpendicular to the an extension direction of the bristles, the bristles have an initial position above the handle and can deviate from the initial position as the brush head rotates;

The elastic part connects the brush head and the handle, and is elastically deformed when the bristles deviate from the initial position, and can drive the bristles to return to the initial position after the external force disappears.
The toothbrush according to claim 1, wherein the elastic member is in the shape of a strip, and the two ends of the elastic member are respectively connected to the brush rod and the handle, and the elastic member deviates from the initial position when the bristles deviate from the initial position. Elastic bending occurs.
The toothbrush of claim 1, wherein a surface of the handle facing the brush head is provided with a first limiting hole, and the brush lever has a second limiting hole opposite to the first limiting hole hole;

The elastic member is strip-shaped, and two ends of the elastic member are respectively inserted into the first limiting hole and the second limiting hole, and the elastic member elastically bends when the bristles deviate from the initial position.
The toothbrush according to claim 3, wherein one end of the elastic member is in interference fit with the first limiting hole, and the other end is in clearance fit with the second limiting hole.
The toothbrush according to claim 3, wherein the two ends of the elastic member are respectively provided with an upper connecting block and a lower connecting block, the upper connecting block is inserted into the second limiting hole, and the lower connecting block is inserted into the second limiting hole. The block is matched and connected with the first limiting hole.
The toothbrush according to claim 3, characterized in that, the elastic member is in the shape of a strip, and extends in a straight line, in a wave shape, or in a spiral shape in the longitudinal direction.
The toothbrush according to claim 3, wherein the elastic member is in the shape of a strip, the cross-section of the elastic member is rectangular, and the long side of the cross-section is parallel to the rotation axis.
The toothbrush of claim 1, wherein the elastic member is a metal strip.
The toothbrush of claim 1, wherein the rotation angle of the brush head causes the bristles to deviate from the original position by no more than 30 degrees.
The toothbrush according to claim 1, characterized in that the deviation angle of the bristles from the original position caused by the rotation of the brush head is [5°-25°].
9. The toothbrush of claim 1, further comprising a sensing structure for detecting pressure on the brush head.
The toothbrush according to any one of claims 1 to 11, wherein the brush head and the handle are rotatably connected by a connecting assembly, and the connecting assembly includes a first lifting arm and a second lifting arm connected to the upper surface of the handle a lift arm, and an adapter for connecting the brush head;

The first lift arm has a first connection hole, the second lift arm has a second connection hole, and the connecting line between the first connection hole and the second connection hole is the rotation axis, and the adapter A first connection block that is inserted and matched with the first connection hole and a second connection block that is inserted and matched with the second connection hole are respectively provided on opposite sides thereof;

The adapter is provided with an escape hole for avoiding the elastic member.