CN212307127U - Brush head and brush handle connection structure and toothbrush - Google Patents

Abstract

The application is suitable for the technical field of cleaning tools, and provides a brush head and brush handle connecting structure and a toothbrush, which comprise a brush head and a brush handle extending along the longitudinal direction, wherein one end of the brush head is provided with an installation groove; one end of the brush handle is provided with a limiting block, and a limiting groove communicated with the mounting groove is formed in the brush head; or the outer side wall of the brush handle is provided with a limit groove, and a limit block is arranged in the brush head; the limit block is accommodated in the mounting groove at one end of the brush handle and is limited in the limit groove so as to limit the relative rotation of the brush handle and the brush head along the circumferential direction; a concave part communicated with the limiting groove is arranged in the brush head, and a convex part is arranged on the limiting block; or a convex part extending into the limiting groove is arranged in the brush head, and a concave part is arranged on the limiting block; the convex part forms concave-convex fit with the concave part when the limiting block is tightly propped in the limiting groove so as to limit the brush head and the brush handle to move relatively along the longitudinal direction. The limiting block is matched with the limiting groove and the convex part is matched with the concave part, so that the brush head and the brush handle are limited to relatively rotate along the circumferential direction and relatively move along the longitudinal direction, and the connection firmness of the brush head and the brush handle is enhanced.

Description

Brush head and brush handle connection structure and toothbrush

Technical Field

The application belongs to the technical field of cleaning tools, and particularly relates to a brush head and brush handle connecting structure and a toothbrush.

Background

The toothbrush generally includes brush head and brush holder, and the one end of brush holder is connected with the installation axle, and the installation axle is used for forming detachable with the brush head and is connected, the change of the toothbrush head of being convenient for.

The brush head and the mounting shaft are generally connected through interference fit or threaded fit, and the connection is low in firmness. For the interference fit mode, after the brush head is replaced for many times, the brush head and the mounting shaft are easy to loosen; to the screw-thread fit mode, the locking position of the brush head and the installation shaft after replacement is different, the specific orientation of the brush head and the brush handle is influenced, the comfort of use is reduced, and the use performance of the toothbrush is influenced.

SUMMERY OF THE UTILITY MODEL

One of the purposes of the embodiment of the application is as follows: the utility model provides a brush head and brush holder connection structure, toothbrush, aim at solving prior art, the firm nature of connection of brush head and installation axle is low and leads to the technical problem that the performance of toothbrush receives the influence.

In order to solve the technical problem, the embodiment of the application adopts the following technical scheme:

the connecting structure of the brush head and the brush handle comprises the brush head and the brush handle which extend along the longitudinal direction, wherein one end of the brush head is provided with a mounting groove for accommodating one end of the brush handle; or the outer side wall of the brush handle is provided with a limiting groove, and a limiting block is arranged in the brush head;

the limiting block is circumferentially limited in the limiting groove when one end of the brush handle is accommodated in the mounting groove so as to limit the relative rotation of the brush handle and the brush head in the circumferential direction;

a concave part communicated with the limiting groove is arranged in the brush head, and a convex part is arranged on the limiting block; or a convex part extending into the limiting groove is arranged in the brush head, and a concave part is arranged on the limiting block;

the convex part and the concave part form concave-convex fit when the limiting block is tightly propped against the limiting groove so as to limit the brush head and the brush handle to move relatively along the longitudinal direction.

In one embodiment, the limiting groove extends longitudinally, and two ends of the limiting groove in the circumferential direction are respectively stopped by a limiting wall, and the limiting block is abutted between the two limiting walls when one end of the brush handle is accommodated in the mounting groove; the concave part is arranged on the limiting wall or the concave part is arranged on the limiting block.

In one embodiment, the concave part is recessed along the circumferential direction, and the convex part abuts against the two sides of the concave part along the longitudinal direction when the limiting block is limited between the two limiting walls.

In one embodiment, the concave portions are provided in two, and the convex portions are provided in two;

the two concave parts are respectively arranged on the two limiting walls, and the two convex parts are respectively arranged at two opposite ends of the limiting block along the circumferential direction; or the two concave parts are respectively arranged at two opposite ends of the limiting block along the circumferential direction, and the two convex parts are respectively arranged on the two limiting walls; the two convex parts are respectively in one-to-one correspondence with the two concave parts to form concave-convex matching.

In one embodiment, the inner wall of the concave part is an arc surface, the concave part is respectively provided with a first inclined surface along two sides in the longitudinal direction, and the outer wall of the convex part is an arc surface for forming concave-convex fit with the concave part.

In one embodiment, the handle includes a hand-held handle and a mounting shaft connected to one end of the hand-held handle, the mounting shaft being receivable in the mounting slot; the limiting block is arranged on the mounting shaft, or the limiting groove is arranged on the outer side wall of the mounting shaft.

In one embodiment, when the limiting groove is arranged in the brush head, the limiting block is arranged on the mounting shaft, and the concave part is arranged in the brush head;

the inner side wall of the brush head is sunken to form the limiting groove; alternatively, the first and second electrodes may be,

the inner side wall of the brush head is provided with two first limiting columns which are opposite to each other and are spaced, the two first limiting columns form the limiting groove at intervals, and the concave portion is arranged on the first limiting columns.

In one embodiment, a second limiting column is further arranged in the brush head, the second limiting column and the first limiting column are distributed along the circumference, and the outer circumferential wall of the mounting shaft abuts against the first limiting column and the second limiting column.

In one embodiment, a first step is formed on the first limiting column, a second step is formed on the second limiting column, and the mounting shaft can abut against the first step and the second step to limit the stroke of the mounting shaft accommodated in the mounting groove.

The application provides a brush head and brush holder connection structure's beneficial effect lies in: compared with the prior art, this application sets up the stopper on another person through seting up the spacing groove on brush holder one end and brush head one of them, and when brush head one end stretched into the mounting groove, the stopper was spacing in the spacing groove, prevented brush holder and brush head along circumference relative rotation. And one of the limiting block and the brush head is provided with a convex part, and the other is provided with a concave part, when the limiting block is abutted against the limiting groove, the convex part and the concave part form concave-convex matching to realize the limiting of the limiting block along the longitudinal direction, so that the brush head and the brush handle are prevented from moving relative to each other along the longitudinal direction. Therefore, the arrangement of the limiting block, the limiting groove, the convex part and the concave part limits the relative rotation of the brush head and the brush handle along the circumferential direction and the relative movement along the longitudinal direction, enhances the connection firmness of the brush head and the brush handle, and avoids the influence on the use performance of the toothbrush caused by the different locking positions of the brush head and the brush handle after the brush head is replaced.

The application also provides a toothbrush, which comprises the brush head and brush handle connecting structure.

The application provides a toothbrush sets up the stopper on one of brush head and brush holder both through seting up the spacing groove on the other, when brush head one end stretches into the mounting groove, the stopper is spacing in the spacing groove, prevents brush holder and brush head along circumference relative rotation. And one of the limiting block and the brush head is provided with a convex part, and the other is provided with a concave part, when the limiting block is abutted against the limiting groove, the convex part and the concave part form concave-convex matching to realize the limiting of the limiting block along the longitudinal direction, so that the brush head and the brush handle are prevented from moving relative to each other along the longitudinal direction. Therefore, the arrangement of the limiting block, the limiting groove, the convex part and the concave part limits the relative rotation of the brush head and the brush handle along the circumferential direction and the relative movement along the longitudinal direction, enhances the connection firmness of the brush head and the brush handle, and avoids the influence on the use performance of the toothbrush caused by the different locking positions of the brush head and the brush handle after the brush head is replaced.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a front view of a brush head incorporating a handle according to one embodiment of the present application;

FIG. 2 is a perspective view of a brush head coupled to a handle according to one embodiment of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a perspective view of a brush head according to an embodiment of the present disclosure;

FIG. 5 is a partial enlarged view of the portion B in FIG. 4;

fig. 6 is a partially enlarged view of a brush head and a handle according to the second embodiment of the present application;

fig. 7 is a perspective structural view of a brush head provided in the second embodiment of the present application;

figure 8 is a cross-sectional view of a brush head provided in accordance with example two of the present application;

figure 9 is a partial cross-sectional view of a brush head incorporating a handle according to a second embodiment of the present application.

Wherein, in the figures, the respective reference numerals:

1-a brush head; 11-mounting grooves; 12-a limiting groove; 13-a recess; 131-a first bevel; 14-a first restraint post; 15-a second limit post; 16-a first step; 17-a second step; 18-clearance groove; 19-a retaining wall; 191-a second bevel; 2-brush handle; 21-a handle; 22-mounting shaft; 221-a first shaft section; 222-a second shaft section; 3, a limiting block; 4-a convex part; y-longitudinal direction.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings, which is for convenience and simplicity of description, and does not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, is not to be considered as limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In order to explain the technical solutions of the present application, the following detailed descriptions are made with reference to specific drawings and examples.

The first embodiment is as follows:

referring to fig. 1 to 5 together, the connection structure of the brush head and the brush handle provided by the embodiment of the present application will be described. The brush head and brush holder connection structure that this application embodiment provided includes brush head 1 and brush holder 2, and brush head 1 and brush holder 2 all set up along vertical y extension. Brush head 1 one end is equipped with mounting groove 11, and mounting groove 11 also correspondingly extends the setting along vertical y, and 2 one end of brush holder are connected in mounting groove 11 along vertical y detachably, realize brush holder 2 and the connection dismantled of brush head 1, the change of brush head 1 of being convenient for.

Specifically, one of the brush head 1 and the brush handle 2 is provided with a limiting block 3, and the other is provided with a limiting groove 12. When 2 one ends of brush holder stretch into in the mounting groove 11, stopper 3 is spacing in spacing groove 12 along circumference to make the cooperation of stopper 3 and spacing groove 12 can restrict brush head 1 and brush holder 2 along the relative rotation of circumference. A concave part 13 communicated with the limiting groove 12 is formed in the brush head 1 in a recessed manner, a convex part 4 is arranged on the limiting block 3, when the limiting block 3 enters the limiting groove 12, the convex part 4 on the limiting block 3 correspondingly forms concave-convex fit with the concave part 13, and the limiting block 3 is limited in the limiting groove 12; at this time, the concave portion 13 is concavely formed in the brush head 1, the extending direction of the concave portion 13 is different from the extending direction of the limiting groove 12, and the limiting directions of the concave portion 13 and the limiting groove 12 for the limiting block 3 are different, so that the limiting block 3 can be limited in the limiting groove 12 at least along the longitudinal direction y by the cooperation of the convex portion 4 and the concave portion 13, and the relative movement of the brush head 1 and the brush handle 2 along the longitudinal direction y is limited, that is, the movement of the brush handle 2 towards the mounting groove 11 and away from the mounting groove 11 is limited. Above, stopper 3 cooperation spacing groove 12, concave part 13 and convex part 4 unsmooth cooperation have restricted brush head 1 and brush holder 2 along the relative rotation of circumference, have also restricted brush head 1 and brush holder 2 along longitudinal y's relative movement.

Referring to fig. 3 and 5, in one embodiment, the limiting groove 12 is opened in the brush head 1 and communicated with the mounting groove 11, the limiting block 3 is disposed on the brush handle 2, and when the brush handle 2 extends into the mounting groove 11, the limiting block 3 on the brush handle 2 extends into the mounting groove 11 along with the brush handle 2 and is limited in the limiting groove 12. Or, in another embodiment, the limiting groove 12 may also be opened on the outer side wall of the mounting shaft 22, and the limiting block 3 is disposed in the brush head 1.

And, recess 13 is sunken to be formed in brush head 1, also is that recess 13 is sunken to be formed in the inside wall of spacing groove 12, and convex part 4 is protruding to be located stopper 3 this moment for when stopper 3 got into spacing groove 12, convex part 4 and unsmooth formation unsmooth cooperation. In practice, the protrusion 4 may be formed in the brush head 1 for convenience of process and use, and the recess 13 is opened on the outer side wall of the stopper 3.

It should also be noted here that the above-mentioned longitudinal direction y refers to the extension trend of the length of the brush head 1 and the brush handle 2, and fig. 1 shows a cross-sectional view of the toothbrush along the longitudinal direction y, where the longitudinal direction y refers to the vertical direction and the circumferential direction is perpendicular to the longitudinal direction y, which refers to the horizontal direction. In particular, the head 1 and the handle 2 extend in a longitudinal direction y, which is the extension of the length of the head 1, the handle 2, wherein the head 1, the handle 2 may extend straight, obliquely or curvedly in the longitudinal direction y. It should be noted that the longitudinal direction y mentioned hereinafter also refers to the same direction as the extension trend of the length of the brush head 1 and the handle 2, the structure described hereinafter extends along the longitudinal direction y, also refers to the linear, oblique or curved extension along the longitudinal direction y, and the circumferential direction refers to the direction perpendicular to the longitudinal direction y on the horizontal projection plane of the longitudinal direction y, and will not be explained one by one hereinafter.

In this application embodiment, set up spacing groove 12 through seting up on one of brush holder 2 and brush head 1 two, set up stopper 3 on the other, when brush head 1 one end stretches into in the mounting groove 11, stopper 3 is spacing in spacing groove 12, prevents that brush holder 2 and brush head 1 from following the relative rotation of circumference. And one of the limiting block 3 and the brush handle 1 is provided with a convex part 4, and the other is provided with a concave part 13, when the limiting block 3 is abutted against the limiting groove 12, the convex part 4 and the concave part 13 form concave-convex matching to realize the limiting of the limiting block 3 along the longitudinal y, and the brush head 1 and the brush handle 2 are prevented from moving relatively along the longitudinal y. Therefore, the arrangement of the limiting block 3, the limiting groove 12, the convex part 4 and the concave part 13 limits the relative rotation of the brush head 1 and the brush holder 2 along the circumferential direction and the relative movement along the longitudinal direction y, enhances the connection firmness of the brush head 1 and the brush holder 2, avoids the influence on the use performance of the toothbrush caused by the different locking positions of the brush head 1 and the brush holder 2 after the brush head 1 is replaced, optimizes the use performance of the toothbrush and improves the use experience of a user.

In one embodiment, referring to fig. 3 and 5, the limiting groove 12 extends along the longitudinal direction y, and the limiting block 3 correspondingly extends along the longitudinal direction y. And spacing groove 12 has two spacing walls 19 that set up relatively along week, spacing groove 12 ends respectively in spacing wall 19 along the ascending both ends of week, when 2 one end of brush holder were held in mounting groove 11, stopper 3 got into in spacing groove 12, and stopper 3 supports tightly between two spacing walls 19, limited stopper 3 along ascending motion of week in spacing groove 12, consequently spacing groove 12 and stopper 3's cooperation has restricted brush head 1 and brush holder 2 along the relative rotation of week, can guarantee to change the relative position of brush head 1 and brush holder 2 behind the brush head 1, improve the comfort in use of toothbrush.

Wherein, the concave part 13 is formed on the limiting wall 19 in a concave way, or the concave part 13 is formed on the limiting block 3 in a concave way.

In one embodiment, referring to fig. 2 and 4, the concave portion 13 is recessed along the circumferential direction, and the convex portion 4 is extended along the circumferential direction. When the limiting block 3 enters the limiting groove 12, at least part of the convex part 4 enters the concave part 13 and forms concave-convex fit with the concave part 13, at the moment, the convex part 4 is abutted between two sides of the concave part 13 along the longitudinal direction y, so that the movement of the convex part 4 in the longitudinal direction y is limited by the arrangement of the concave part 13, the relative movement of the brush head 1 and the brush handle 2 along the longitudinal direction y is limited by the cooperation of the convex part 4 and the concave part 13 of the concave part 13, the connection firmness of the brush head 1 and the brush handle 2 is improved, and the loosening of the brush head 1 and the.

Wherein, the concave part 13 is formed on the limiting wall 19 along the circumferential direction, and the convex part 4 is formed on the limiting block 3 along the circumferential direction. Alternatively, the concave portion 13 is formed by being recessed in the outer side wall of the stopper 3 in the circumferential direction, and the convex portion 4 is provided on the stopper wall 19.

Above, stopper 3 cooperates and forms unsmooth cooperation in spacing groove 12, convex part 4 and concave part 13, has avoided brush head 1 and brush holder 2 along the relative rotation of circumference, has still restricted brush head 1 and brush holder 2 along the relative movement on vertical y simultaneously.

In an embodiment, please refer to fig. 3 and fig. 5 together, when the concave portion 13 is formed on the limiting wall 19, in order to enhance the stability of the limiting block 3 in the limiting groove 12, the two limiting walls 19 are both provided with the concave portions 13, where the two concave portions 13 are provided, the two opposite ends of the limiting block 3 along the circumferential direction are both provided with the convex portions 4, and the two convex portions 4 are also correspondingly provided, when the limiting block 3 enters the limiting groove 12, the two convex portions 4 respectively form the concave-convex fit with the two concave portions 13 in one-to-one correspondence, so as to enhance the stability of the limiting block 3 in the limiting groove 12, and at the same time, enhance the limiting strength of the limiting block 3 in the limiting groove 12 along the longitudinal direction y, that is, enhance the connection firmness of the brush head 1 and the. Of course, the number of the concave portions 13 may be four, six, etc., and is not limited to these. Correspondingly, the convex portions 4 are correspondingly provided as four, six, etc. Correspondingly, when the concave portion 13 is concavely formed on the outer side wall of the stopper 3, the same is also true as the above embodiment. In addition, when the concave parts 13 and the convex parts 4 are both arranged in the singular number, the singular number of the convex parts 4 and the singular number of the concave parts 13 are in one-to-one correspondence to form concave-convex matching, and the limit of the brush head 1 and the brush handle 2 in the longitudinal direction can also be formed.

In an embodiment, referring to fig. 3 and fig. 5, an inner wall of the concave portion 13 is an arc surface, two sides of the concave portion 13 along the longitudinal direction y are respectively provided with a first inclined surface 131, an outer wall of the convex portion 4 is an arc surface for forming a concave-convex fit with the concave portion 13, when the stopper 3 enters the stopper groove 12, the convex portion 4 enters the concave portion 13 through the first inclined surface 131, and the arrangement of the first inclined surface 131 improves the smoothness of the convex portion 4 entering the concave portion 13, so as to solve the problem that the convex portion 4 is difficult to enter the concave portion 13.

Specifically, the limiting groove 12 extends to the outside along one end on the longitudinal direction y, a second inclined plane 191 is formed on the limiting wall 19, the second inclined plane 191 is arranged at the end of the limiting groove 12, the opening of the limiting groove 12 for the limiting block 3 to enter is enlarged due to the arrangement of the second inclined plane 191, and the smoothness of the limiting block 3 entering the limiting groove 12 is improved.

In one embodiment, the handle 2 includes a handle 21 and a mounting shaft 22 connected to one end of the handle 21, and the mounting shaft 22 is connected to the handle 21 in a separated manner or in an integrated manner. And the installation axle 22 can be held in the installation groove 11, and the outer diameter of the installation axle 22 is less than the outer diameter of the handle 21, so that the connection between the brush holder 2 and the brush head 1 is facilitated.

The above-mentioned limiting block 3 is disposed on the mounting shaft 22, or the above-mentioned limiting groove 12 is disposed on the outer sidewall of the mounting shaft 22.

In one embodiment, referring to fig. 3 and 5, for the convenience of processing, the limiting groove 12 is disposed in the brush head 1, the limiting block 3 is disposed on the mounting shaft 22, more specifically, the limiting groove 12 is disposed on the inner side wall of the toothbrush, and the limiting block 3 is disposed on the outer side wall of the mounting shaft 22.

Wherein, be provided with the stopper 3 that two intervals set up on the installation axle 22, set up the spacing groove 12 that two intervals set up on the inside wall of brush head 1, here, spacing groove 12 and stopper 3 also can set up to more than two.

Specifically, the one end of spacing groove 12 on vertical y extends to the outside, and spacing groove 12 is equipped with the lateral wall along the other end on vertical y, and when stopper 3 got into spacing groove 12, stopper 3 supported tightly on this lateral wall to the stroke that restriction stopper 3 got into spacing groove 12 avoids brush holder 2 infinitely to stretch into in the brush head 1.

Example two:

referring to fig. 6 to 9, the difference between the present embodiment and the first embodiment is: be equipped with two first spacing posts 14 on the inside wall of brush head 1, first spacing post 14 extends along vertical y, and two first spacing posts 14 are just to and the interval sets up, and two first spacing posts 14 interval forms spacing groove 12, and spacing groove 12 intercommunication mounting groove 11, then the concave part 13 is seted up on first spacing post 14. When the mounting shaft 22 extends into the mounting groove 11, the outer side wall of the mounting shaft 22 abuts against the first limiting posts 14, so that the limiting blocks 3 on the mounting shaft 22 enter the limiting grooves 12 formed by the two first limiting posts 14 at intervals, and at this time, the convex portions 4 on the limiting blocks 3 correspondingly enter the concave portions 13 and form concave-convex fit with the concave portions 13.

Specifically, referring to fig. 7, when the mounting shaft 22 extends into the mounting groove 11, the outer side wall of the mounting shaft 22 moves relative to the outer side wall of the first limiting post 14, at this time, the mounting shaft 22 moves along the outer side wall of the first limiting post 14, and the limiting block 3 on the moving mounting shaft 22 also enters the limiting groove 12 along the first limiting post 14, so as to position the limiting block 3.

In one embodiment, referring to fig. 7 and 8, the inner wall of the brush head 1 is further provided with a second limiting post 15 along the longitudinal direction y, the second limiting post 15 and the first limiting post 14 are distributed along the circumferential direction, the mounting shaft 22 enters the mounting groove 11 along the inner side walls of the first limiting post 14 and the second limiting post 15, and the outer circumferential wall of the mounting shaft 22 abuts against the inner side wall of the first limiting post 14 and the inner side wall of the second limiting post 15, so that the strength of the mounting shaft 22 limited in the mounting groove 11 is enhanced.

Specifically, the second limit posts 15 are arranged in a plurality of numbers, the second limit posts 15 are arranged at intervals, the second limit posts 15 and the first limit posts 14 are arranged at intervals, and the second limit posts 15 and the first limit posts 14 are uniformly distributed in the circumferential direction.

In an embodiment, referring to fig. 7 and 8, a first step 16 is formed on the first position-limiting pillar 14, and the first step 16 is disposed at an end of the first position-limiting pillar 14 away from the opening of the mounting groove 11; the spacing post 15 of second is last to be formed with the second step, and the second step sets up in the open-ended one end that the spacing post 15 of second deviates from mounting groove 11, when installation axle 22 slided into in mounting groove 11, installation axle 22 can support the step face in first step 16 and the step face of second step tightly, and the step face of first step 16 and the step face of second step set up towards the opening of mounting groove 11, thereby when making mounting groove 11 support tightly on first step 16 and second step, installation axle 22 has been restricted towards the ascending stroke of mounting groove 11's side, avoid installation axle 22 infinitely to stretch into in the mounting groove 11.

In this embodiment, the step surface of the first step 16 and the step surface of the second step are both provided with inclined surfaces, which facilitates the adjustment of the position of the end of the mounting shaft 22.

In one embodiment, referring to fig. 6-9, the mounting shaft 22 includes a first shaft section 221 connected to the handle 2 and a second shaft section 222 connected to the first shaft section 221, and the outer diameter of the second shaft section 222 is smaller than the outer diameter of the end of the first shaft section 221 facing away from the handle 2. The first step 16 and the second step are enclosed to form an empty avoiding groove 18 communicated with the mounting groove 11, when the mounting shaft 22 enters the mounting groove 11, the edge of the first shaft section 221 abuts against the step surface of the first step 16 and the step surface of the second step, and at the moment, the second shaft section 222 extends into the empty avoiding groove 18, so that an empty avoiding effect is realized, and the second shaft section 222 is prevented from being damaged.

Specifically, in this embodiment, the first shaft section 221 is configured to have an outer diameter gradually decreasing from the end of the brush handle 2 close to the end of the second shaft section 222, so as to correspondingly decrease the occupied space of the brush head 1 and reserve a space for forming the brush head 1.

The rest of this embodiment is the same as the first embodiment, and the unexplained features in this embodiment are explained by the first embodiment, which is not described herein again.

The application further provides a toothbrush, which comprises a connecting structure of the brush head and the brush handle, wherein the connecting structure of the brush head and the brush handle adopts the structures described in the first embodiment and the second embodiment, and the specific structure of the connecting structure of the brush head and the brush handle is described in detail in the embodiments and is not repeated.

Wherein, the toothbrush can be set as an electric toothbrush, and can also be set as a common toothbrush. When the toothbrush is an electric toothbrush, the vibration motor of the toothbrush is arranged in the brush holder 2, and the mounting shaft 22 is covered on the vibration shaft of the vibration motor, so that the vibration shaft and the mounting shaft 22 simultaneously extend into the mounting groove 11, and the brush head 1 is convenient to vibrate.

The application provides a toothbrush, through set up spacing groove 12 on brush head 1 and brush holder 2 one between them, set up stopper 3 on the other, when brush head 1 one end stretches into mounting groove 11 in, stopper 3 is spacing in spacing groove 12, prevents that brush holder 2 and brush head 1 from following the relative rotation of circumference. And one of the inner side walls of the limiting block 3 and the brush handle 1 is provided with a convex part 4, the other one is provided with a concave part 13, when the limiting block 3 is abutted against the limiting groove 12, the convex part 4 and the concave part 13 form concave-convex matching to realize the limiting of the limiting block 3 along the longitudinal y, and the brush head 1 and the brush handle 2 are prevented from moving relatively along the longitudinal y. Therefore, the arrangement of the limiting block 3, the limiting groove 12, the convex part 4 and the concave part 13 limits the relative rotation of the brush head 1 and the brush holder 2 along the circumferential direction and the relative movement along the longitudinal direction y, enhances the connection firmness of the brush head 1 and the brush holder 2, and avoids the influence on the use performance of the toothbrush caused by the different locking positions of the brush head 1 and the brush holder 2 after the brush head 1 is replaced.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. A connecting structure of a brush head and a brush handle comprises the brush head and the brush handle which extend along the longitudinal direction, wherein one end of the brush head is provided with a mounting groove for accommodating one end of the brush handle; or a limiting block is arranged in the brush head, and a limiting groove is formed in the outer side wall of the brush handle;

the limiting block is circumferentially limited in the limiting groove when one end of the brush handle is accommodated in the mounting groove so as to limit the relative rotation of the brush handle and the brush head in the circumferential direction;

a concave part communicated with the limiting groove is arranged in the brush head, and a convex part is arranged on the limiting block; or a convex part extending into the limiting groove is arranged in the brush head, and a concave part is arranged on the limiting block;

the convex part and the concave part form concave-convex fit when one end of the brush handle is accommodated in the mounting groove so as to limit the relative movement of the brush head and the brush handle along the longitudinal direction.

2. The connecting structure of the brush head and the brush handle according to claim 1, wherein the limiting groove extends along the longitudinal direction, and both ends of the limiting groove along the circumferential direction are respectively stopped by a limiting wall, and the limiting block is abutted between the two limiting walls when one end of the brush handle is accommodated in the mounting groove; the concave part is arranged on the limiting wall or the concave part is arranged on the limiting block.

3. The connecting structure of the brush head and the brush handle according to claim 2, wherein the concave portion is recessed in the circumferential direction, and the convex portion abuts against the concave portion between both sides in the longitudinal direction when the stopper is caught between both the stopper walls.

4. The brush head and handle connection of claim 2, wherein the recesses are provided in two and the protrusions are provided in two;

the two concave parts are respectively arranged on the two limiting walls, and the two convex parts are respectively arranged at two opposite ends of the limiting block along the circumferential direction; or the two concave parts are respectively arranged at two opposite ends of the limiting block along the circumferential direction, and the two convex parts are respectively arranged on the two limiting walls; the two convex parts are respectively in one-to-one correspondence with the two concave parts to form concave-convex matching.

5. The connecting structure of the brush head and the brush handle according to claim 2, wherein the inner wall of the concave portion is a circular arc surface, the concave portion is provided with first inclined surfaces along both sides in the longitudinal direction, and the outer wall of the convex portion is a circular arc surface for forming a concave-convex fit with the concave portion.

6. The brush head and handle connection according to any one of claims 1-5 wherein the handle comprises a handle and a mounting shaft connected to one end of the handle, the mounting shaft capable of being received in the mounting slot; the limiting block is arranged on the mounting shaft, or the limiting groove is arranged on the outer side wall of the mounting shaft.

7. The brush head and handle connection of claim 6, wherein when the retaining groove is provided in the brush head, the retaining block is provided on the mounting shaft, and the recess is provided in the brush head;

the inner side wall of the brush head is sunken to form the limiting groove; alternatively, the first and second electrodes may be,

the inner side wall of the brush head is provided with two first limiting columns which are opposite to each other and are spaced, the two first limiting columns form the limiting groove at intervals, and the concave portion is arranged on the first limiting columns.

8. The connecting structure of the brush head and the brush handle according to claim 7, wherein a second limiting column is further provided in the brush head, the second limiting column and the first limiting column are distributed along the circumference, and the outer circumferential wall of the mounting shaft abuts against the first limiting column and the second limiting column.

9. The connecting structure of the brush head and the brush handle according to claim 8, wherein a first step is formed on the first limiting column, a second step is formed on the second limiting column, and the mounting shaft can abut against the first step and the second step to limit the stroke of the mounting shaft accommodated in the mounting groove.

10. A toothbrush comprising a head and handle connection according to any of claims 1 to 9.

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