CN219645933U - Electric toothbrush and brush head thereof - Google Patents

Abstract

The utility model discloses a brush head of an electric toothbrush and the electric toothbrush, wherein the brush head of the electric toothbrush comprises: a brush bar comprising a stem portion and a head portion, the head portion being adapted to receive a tooth cleaning element; and the connecting structure is integrally formed with the rod part, the connecting structure defines an insertion hole, two ends of the insertion hole along the length direction of the rod part are respectively a first end and a second end, the first end is positioned at one side of the second end far away from the head part, the first end is opened to be suitable for the output shaft of the handle of the electric toothbrush to extend into the insertion hole, the inner wall of the insertion hole comprises an arc surface part and a flat part which are arranged along the circumferential direction of the insertion hole, the flat part is suitable for being in interference fit with the flat part of the output shaft, the connecting structure comprises a first positioning part in the insertion hole, and the first positioning part is suitable for being in positioning fit with the output shaft to inhibit the output shaft from moving towards the direction of the head part. The brush head of the electric toothbrush can reduce the size limitation of the output shaft of the handle and is beneficial to the daily use of users.

Description

Electric toothbrush and brush head thereof

Technical Field

The utility model relates to the technical field of electric toothbrushes, in particular to a brush head of an electric toothbrush and the electric toothbrush.

Background

In the related art, the brush head of the electric toothbrush comprises bristles, a brush rod and a connecting piece, wherein the connecting piece is connected to one end of the brush rod, the bristles are connected to the other end of the brush rod, the connecting piece and the brush rod are arranged in a split mode and are fixedly connected with the brush rod, the connecting mode of the brush rod and the connecting piece is usually in plug-in connection or clamping connection, the connecting piece needs to extend into the brush rod, the size of the connecting piece is limited, the connecting piece is used for being connected with an output shaft of a handle in a plug-in manner, the size of the connecting piece can influence the size of an upper slot of the connecting piece, and the size and shape of the output shaft of the handle can be further limited.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the brush head of the electric toothbrush, which can reduce the size limitation of the output shaft of the handle and is beneficial to daily use of users.

A brush head of an electric toothbrush according to an embodiment of the present utility model includes: the toothbrush comprises a toothbrush rod and a toothbrush head, wherein the toothbrush rod comprises a rod part and a toothbrush head, the toothbrush head is arranged at one end of the length of the rod part, and the toothbrush head is suitable for being provided with tooth cleaning elements; and the connecting structure is integrally formed with the rod part, the connecting structure defines an insertion hole, the two ends of the insertion hole are respectively a first end and a second end along the length direction of the rod part, the first end is positioned at one side, far away from the head, of the second end, the first end is opened to be suitable for an output shaft of a handle of the electric toothbrush to extend into the insertion hole, the inner wall of the insertion hole comprises an arc surface part and a flat part which are circumferentially arranged along the insertion hole, the flat part is suitable for being in interference fit with the flat part of the output shaft, the connecting structure comprises a first positioning part in the insertion hole, and the first positioning part is suitable for being in positioning fit with the output shaft so as to inhibit the output shaft from moving towards the direction of the head.

According to the electric toothbrush brush head, the connecting structure and the rod part are integrally formed, the connecting structure is used for defining the insertion hole, the output shaft of the handle can extend into the insertion hole to enable the handle to be connected with the rod part, so that the size limitation of the output shaft of the handle can be reduced, the assembly process is simplified, the assembly difficulty is reduced, meanwhile, the connecting structure and the handle can be prevented from being separated, daily use of a user is facilitated, meanwhile, the first positioning part is arranged, the brush rod is prevented from being contacted with the handle, noise and vibration are reduced, and the flat position of the flat position part and the output shaft are in interference fit, so that the clamping and locking of the connecting structure to the output shaft are realized, and torque transmission between the two is facilitated.

According to some embodiments of the utility model, the housing of the stem defines a cavity therein, a side of the cavity facing away from the head in a length direction of the stem is open, and the connecting structure includes a mating portion defining the mating hole and a connecting portion disposed in the cavity and spaced apart from the housing, the connecting portion being connected between an outer wall of the mating portion and an inner wall of the housing.

The brush head of the electric toothbrush according to some embodiments of the present utility model, the connection part includes a plurality of support ribs disposed at intervals along the circumferential direction of the insertion hole.

According to the brush head of the electric toothbrush according to some embodiments of the present utility model, the extension dimension of the support rib in the direction from the insertion portion to the housing is the width of the support rib, and the width of at least one section of at least one support rib gradually increases in the direction from the head portion to the stem portion.

According to some embodiments of the utility model, the distance between the outer wall of the mating portion and the inner wall of the housing increases gradually in a direction from the head portion to the stem portion, either first and then, or first and then.

According to some embodiments of the utility model, the cross-sectional area of the outer wall of the mating portion decreases gradually in a direction from the head portion to the stem portion; and/or the cross-sectional area of the inner wall of the housing increases gradually in a direction from the head portion to the stem portion.

In accordance with some embodiments of the present utility model, the distance a between the outer wall of the mating portion and the inner wall of the housing is 2mm-4mm on the open side of the cavity.

The wall thickness b of the insertion part of the brush head of the electric toothbrush according to some embodiments of the present utility model is 1.2mm-2.5mm.

A brush head of an electric toothbrush according to some embodiments of the present utility model, the insert portion comprising: the flat plate comprises a flat plate and an arc plate, wherein the arc plate is arranged on one side of the thickness of the flat plate, the axis of the arc plate is positioned on one side of the arc plate facing the flat plate, the insertion hole is defined between the arc plate and the flat plate, the hole wall of the insertion hole is disconnected at the position between the arc plate and the flat plate, the inner side wall of the arc plate is defined with the arc surface part, and the inner side wall of the flat plate is defined with the flat position part.

According to the brush head of the electric toothbrush, the inner side wall of the flat plate is provided with a clamping structure which is suitable for being matched with the output shaft in a clamping mode.

According to the brush head of the electric toothbrush of some embodiments of the present utility model, a side wall surface of the paddle, which is away from the insertion hole, is an outer side wall of the paddle, the connection portion includes a first support rib provided between the outer side wall of the paddle and an inner wall of the housing, an extension dimension of the first support rib in a direction from the insertion portion to the housing is a width of the first support rib, and at an end portion of the paddle, which is away from the head portion, the width of the first support rib becomes zero or gradually decreases in a direction from the head portion to the stem portion.

According to some embodiments of the utility model, the part of the flat plate away from the head is configured as a cantilever section, the dimension of the cantilever section in the length direction of the rod part is the length of the cantilever section, and the length c of the cantilever section is 5mm-15mm.

According to the brush head of the electric toothbrush, one side wall surface of the arc plate, which is far away from the insertion hole, is an outer side wall of the arc plate, the connecting part comprises a second supporting rib arranged between the outer side wall of the arc plate and the inner wall of the shell, the extending dimension of the second supporting rib in the direction from the insertion part to the shell is the width of the second supporting rib, and the width d of one end, far away from the head, of the second supporting rib is 5-15 mm.

The radius e of the insertion hole of the brush head of the electric toothbrush according to some embodiments of the present utility model is 1.8mm-2.2mm.

According to some embodiments of the utility model, the cross-sectional area of at least a section of the stem portion increases gradually in a direction from the head portion to the stem portion.

According to some embodiments of the utility model, the cross-sectional area of the end of the stem connected to the head is S1, and the cross-sectional area of the end of the stem remote from the head is S2, wherein S1/S2 is 1:10-1:2.

According to some embodiments of the utility model, the first positioning portion forms a stop portion having a stop surface adapted to stop the output shaft.

According to some embodiments of the utility model, the abutment surface is adapted to abut against a side axial end of the output shaft remote from the handle, and a maximum distance L between the head and the abutment surface in a length direction of the shaft is 17.5mm-18.5mm.

According to the brush head of the electric toothbrush, grooves or ribs are formed on the inner wall of the insertion hole, the grooves are suitable for being matched with limit ribs on the peripheral wall of the output shaft, and the ribs are suitable for being in interference fit with the peripheral wall of the output shaft.

The brush head of the electric toothbrush according to some embodiments of the present utility model, the connecting structure further includes a second positioning portion located on a side of the first positioning portion away from the head, the second positioning portion being adapted to be in positioning engagement with the output shaft to inhibit movement of the output shaft in a direction away from the head.

According to some embodiments of the utility model, the second positioning portion is a clamping structure and is suitable for being matched with the output shaft in a clamping way.

The utility model also provides an electric toothbrush.

An electric toothbrush according to an embodiment of the present utility model includes: the brush head of any one of the above embodiments and the handle, the handle includes an output shaft, the output shaft stretches into the insertion hole and is in positioning fit with the first positioning portion, and the flat position of the output shaft is in interference fit with the flat position portion of the insertion hole.

According to some embodiments of the utility model, the end of the handle facing the brush head is a first plane, the end of the brush head facing the handle is a second plane, the first plane is in clearance fit with the second plane, and the output shaft extends out of the first plane and into the insertion hole from the second plane.

The electric toothbrush and the brush head of the electric toothbrush have the same advantages compared with the prior art, and are not described in detail herein.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic view of a brush head of an electric toothbrush according to some embodiments of the present utility model;

FIG. 2 is an enlarged view at A in FIG. 1;

FIG. 3 is a bottom view of the brush head shown in FIG. 1;

FIG. 4 is an exploded view of the brush head shown in FIG. 1;

FIG. 5 is a schematic view of a brush bar of the brush head shown in FIG. 4;

FIG. 6 is a cross-sectional view at B-B in FIG. 1;

FIG. 7 is a cross-sectional view taken at B-B of FIG. 1;

FIG. 8 is a schematic view of the fastening structure of the brush head shown in FIG. 1 configured as a hook;

FIG. 9 is a schematic view of the clip structure of the brush head shown in FIG. 1 configured as a clip groove;

FIG. 10 is a schematic view of an electric toothbrush according to some embodiments of the present utility model;

fig. 11 is a schematic view of the handle of the electric toothbrush shown in fig. 10.

Reference numerals:

the electric toothbrush 1000 is provided with a pair of bristles,

the head 100, the second plane 101,

handle 200, first plane 201, output shaft 210,

the brush bar 10 is provided with a plurality of bristles,

the length of the shaft 11, the cavity 111,

the head 12, the tooth cleaning elements 13,

the connecting structure 20, the plug-in part 21, the flat plate 211, the cantilever section 2111, the arc plate 212,

the insertion hole 213, the arc surface portion 214, the flat portion 215,

the connection portion 22, the first support rib 221, the second support rib 222,

the first positioning portion 23, the abutment portion 231, the abutment surface 232,

The clamping structure 30, the clamping hook 31, the clamping groove 32,

grooves 41 and ribs 42.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the utility model. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the utility model. Furthermore, the present utility model may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present utility model provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the applicability of other processes and/or the use of other materials.

A brush head 100 of an electric toothbrush according to an embodiment of the present utility model is described below with reference to fig. 1 to 11.

As shown in fig. 1, a brush head 100 of an electric toothbrush according to an embodiment of the present utility model includes: a brush bar 10 and a connecting structure 20.

Specifically, as shown in fig. 1, the brush bar 10 includes a shaft 11 and a head 12, the head 12 is provided at one end of the length of the shaft 11, and the head 12 is adapted to provide a tooth cleaning element 13; and the connection structure 20 is integrally formed with the rod portion 11, the connection structure 20 defines an insertion hole 213, two ends of the insertion hole 213 along the length direction of the rod portion 11 are a first end and a second end respectively, the first end is located at one side of the second end away from the head portion 12, the first end is open to be suitable for the output shaft 210 of the handle 200 of the electric toothbrush 1000 to extend into the insertion hole 213, the inner wall of the insertion hole 213 comprises a cambered surface portion 214 and a flat portion 215 which are arranged along the circumferential direction of the insertion hole 213, the flat portion 215 is suitable for interference fit with the flat portion of the output shaft 210, the connection structure 20 comprises a first positioning portion 23 in the insertion hole 213, and the first positioning portion 23 is suitable for positioning fit with the output shaft 210 to inhibit the output shaft 210 from moving towards the head portion 12.

Therefore, the output shaft 210 of the handle 200 can extend into the insertion hole 213 to connect the handle 200 with the rod portion 11, so that the size limitation of the output shaft 210 of the handle 200 can be reduced, the assembly process is simplified, the assembly difficulty is reduced, meanwhile, the connection structure 20 and the handle 200 can be prevented from being separated so as to be beneficial to daily use of a user, meanwhile, the brush rod 10 is prevented from being contacted with the handle 200 by the aid of the first positioning portion 23, noise and vibration are reduced, and the clamping and locking of the connection structure 20 to the output shaft 210 are realized by the aid of the flat position interference fit of the flat position portion 215 and the output shaft 210, and torque transmission between the two is facilitated.

For example, the brush bar 10 includes a shaft 11 and a head 12, the shaft 11 is connected to the output shaft 210 of the handle 200 through the connection structure 20, and one end of the length of the shaft 11 is provided with the head 12, and the head 12 is used to provide the tooth cleaning elements 13, for example, the tooth cleaning elements 13 may be configured as bristles or brush cloths, so that, in actual assembly, the brush head 100 may be connected to the handle 200 through the connection structure 20, and a user can hold the handle 200 to bring the tooth cleaning elements 13 into contact with teeth, thereby achieving cleaning of the teeth.

Wherein, connection structure 20 and pole portion 11 integrated into one piece, no longer need be singly connected between connection structure 20 and the brush head 100, like this, when actual assembly, can stretch the output shaft 210 of handle 200 to the plug-in hole 213 that connection structure 20 prescribes a limit to in, in order to realize the output shaft 210 of handle 200 and connection structure 20's connection, realize that handle 200 and brush head 100's connection is fixed promptly, in order to simplify the assembly process, and do benefit to the reduction assembly degree of difficulty, improve assembly efficiency, simultaneously, in daily use, the circumstances of connection structure 20 and brush-holder stud 10 separation can not appear, do benefit to user's daily use.

It should be noted that, in the related art, the brush bar 10 is connected to the output shaft 210 of the handle 200 through a connector, and the connector needs to extend into the brush bar 10, so that the volume of the connector is limited, and the connector is used for being connected to and plugged into the output shaft 210 of the handle 200, so that the size of the connector affects the size of the slot thereon, and further limits the size and shape of the output shaft 210 of the handle 200, and thus the size of the motor. Furthermore, the brush bar 10 and the connecting piece that are separately arranged may cause the connecting piece to be separated from the brush bar 10 during the process of inserting and pulling the brush bar into the brush bar, which affects the daily use of the user.

In the utility model, the connecting structure 20 and the rod 11 are integrally formed, i.e. the connecting structure 20 and the rod 11 are integrally designed, so that the problem that the brush rod 10 is separated from the connecting structure 20 in the using process of the electric toothbrush 1000 is avoided, and the electric toothbrush is beneficial to daily use of users.

It should be noted that the "integrally forming the connecting structure 20 with the stem 11" includes, but is not limited to, the connecting structure 20 being located outside the stem 11 or the connecting structure 20 being located inside the stem 11.

For example, the connection structure 20 may be located at the outer side of the rod 11, so as to facilitate the setting of the connection structure 20, facilitate reducing the setting difficulty of the connection structure 20, and since the connection structure 20 is located at the outer side of the rod 11, the size of the connection structure 20 is not limited by the rod 11, thus, the connection structure 20 may define the insertion holes 213 with different sizes, so as to meet the setting requirements of the output shaft 210 of the handle 200 with different sizes, so as to facilitate reducing the size limitation of the output shaft 210 of the handle 200, and also reduce the size limitation of the motor of the handle 200.

Or as shown in fig. 1, the connection structure 20 may be located at the inner side of the rod portion 11, that is, the connection structure 20 is integrated in the rod portion 11, so that the connection between the handle 200 and the brush head 100 can be realized, and meanwhile, the installation space in the rod portion 11 can be conveniently and fully utilized, so that the occupation of the installation space at the outer side is reduced, and the miniaturization design of the brush head 100 is facilitated.

As shown in fig. 1, the connection structure 20 defines an insertion hole 213, and an end of the insertion hole 213 remote from the head 12 is opened, so that the output shaft 210 of the handle 200 can extend into the insertion hole 213 along the opened end of the insertion hole 213, to achieve connection of the output shaft 210 with the brush rod 10.

Further, as shown in fig. 3, the inner wall of the insertion hole 213 includes a cambered surface portion 214 and a flat portion 215 arranged along the circumferential direction of the insertion hole 213, and the flat portion 215 is adapted to be in interference fit with the flat portion of the output shaft 210, so that when the output shaft 210 of the handle 200 extends into the insertion hole 213, the output shaft 210 can be clamped and locked by the cooperation of the flat portion 215 and the cambered surface portion 214, so as to enhance the connection stability of the output shaft 210 and the connection structure 20, and facilitate the torque transmission between the output shaft 210 and the brush rod 10.

Further, as shown in fig. 3, the connection structure 20 includes a first positioning portion 23 in the insertion hole 213, and the first positioning portion 23 is adapted to be in positioning engagement with the output shaft 210 to inhibit the output shaft 210 from moving toward the head 12. Thus, by providing the first positioning portion 23, the output shaft 210 can be positioned, so that the problem that noise or vibration is generated due to the contact between the handle 200 and the brush rod 10 caused by the fact that the part of the output shaft 210 extending into the insertion hole 213 is too long can be avoided.

According to the brush head 100 of the electric toothbrush, the connecting structure 20 and the rod 11 are integrally formed, the connecting structure 20 defines the insertion hole 213, the output shaft 210 of the handle 200 can extend into the insertion hole 213 to enable the handle 200 to be connected with the rod 11, so that the size limitation of the output shaft 210 of the handle 200 can be reduced, the assembly process is convenient to simplify, the assembly difficulty is reduced, the connecting structure 20 and the handle 200 can be prevented from being separated so as to be beneficial to daily use of a user, meanwhile, the brush rod 10 is prevented from being contacted with the handle 200 by the aid of the first positioning part 23, noise and vibration are reduced, and the clamping and locking of the connecting structure 20 to the output shaft 210 are realized by the aid of the flat position interference fit of the flat position part 215 and the flat position of the output shaft 210, so that torque transmission between the two is facilitated.

In some embodiments, as shown in fig. 1-3, the housing interior of the stem 11 defines a cavity 111, the side of the cavity 111 facing away from the head 12 in the length direction of the stem 11 is open, the connection structure 20 includes a mating portion 21 and a connecting portion 22, the mating portion 21 defines a mating hole 213, the mating portion 21 is disposed within the cavity 111 and spaced apart from the housing, and the connecting portion 22 is connected between an outer wall of the mating portion 21 and an inner wall of the housing.

Therefore, by arranging the cavity 111 in the rod portion 11 so as to arrange the connecting structure 20 in the cavity 111, thereby fully utilizing the installation space in the rod portion 11, the miniaturized design of the rod portion 11 is facilitated, and the insertion portion 21 is arranged in the cavity 111, so that the insertion portion 21 can effectively utilize the installation space in the cavity 111, the size selectivity of the insertion portion 21 is larger, and the size selectivity of the insertion hole 213 defined by the insertion portion 21 is larger.

Further, as shown in fig. 1 to 3, the connection portion 22 is connected between the mating portion 21 and the inner wall of the housing, that is, the connection portion 22 is connected between the mating portion 21 and the inner wall of the cavity 111, so as to support and fix the mating portion 21, thereby enhancing the structural stability of the mating portion 21.

The cavity 111 is open at a side facing away from the head 12, that is, the cavity 111 is open toward the direction of the handle 200, so that demolding after the rod 11 and the connecting structure 20 are integrally formed is facilitated, and demolding difficulty is reduced.

Further, as shown in fig. 1 to 3, the connection portion 22 includes a plurality of support ribs disposed at intervals along the circumferential direction of the insertion hole 213.

In other words, the supporting ribs are arranged at intervals along the circumferential direction of the insertion part 21, so that the supporting ribs are arranged between the insertion part 21 and the inner wall of the cavity 111, thereby playing a role in supporting and reinforcing, avoiding the problems of structural damage, axial deviation, misalignment and the like caused by stress deformation of the insertion part 21 during connection, and stably swinging the brush head 100 during operation of the electric toothbrush 1000; in addition, the electric toothbrush 1000 generally has a motor and a battery in the handle 200, the handle 200 has a heavy weight, when the electric toothbrush 1000 falls, if the brush head 100 is first landed, the brush head 100 is stressed greatly, the brush head 100 is easily broken, especially if the connection between the insertion part 21 and the output shaft 210 is lack of support, the insertion part 21 is easily damaged, so that not only the support rib but also a plurality of support ribs arranged at intervals along the circumferential direction are needed.

Further, the extension dimension of the support rib in the direction from the insertion portion 21 to the housing is the width of the support rib, and the width of at least one section of at least one support rib gradually increases in the direction from the head portion 12 to the lever portion 11.

This can enhance the connection strength between the mating part 21 and the housing, and can stabilize the mating part 21, and can stably transmit vibration when in use.

In some embodiments, the distance between the outer wall of the mating portion 21 and the inner wall of the housing increases gradually, either first and then, or first and then, in the direction from the head 12 to the stem 11.

Therefore, in the production process, the whole material consumption of the brush rod 10 is less, so that the quality of the brush head 100 is reduced, the molding and demolding can be conveniently performed, and the conditions of burrs, mutual adhesion and the like caused by too small distance between the outer wall of the inserting and matching part 21 and the inner wall of the shell can be avoided.

In some embodiments, the cross-sectional area of the outer wall of the mating portion 21 gradually decreases in the direction from the head 12 to the stem 11; and/or the cross-sectional area of the inner wall of the housing increases gradually in the direction from the head 12 to the shaft 11.

Thus, the demolding after the housing and the insertion part 21 are integrally formed is facilitated, and the processing difficulty is reduced.

In some embodiments, as shown in fig. 3, the distance a between the outer wall of the mating portion 21 and the inner wall of the housing is 2mm-4mm on the open side of the cavity 111.

If the distance between the outer wall of the mating part 21 and the inner wall of the housing is too small, demolding after the mating part 21 and the housing are integrally formed is not facilitated, and if the distance between the outer wall of the mating part 21 and the inner wall of the housing is too large, the size of the brush holder 10 is large, or the wall thicknesses of the mating part 21 and the housing are thin, so that the structural strength cannot be ensured, and therefore, the distance between the outer wall of the mating part 21 and the inner wall of the housing is required.

If the distance between the outer wall of the mating portion 21 and the inner wall of the housing is between 2mm and 4mm, for example, a=2.6 mm, a=2.9 mm, or a=3.2 mm, that is, when the distance between the outer wall of the mating portion 21 and the inner wall of the housing satisfies the above-mentioned value relationship, it can be ensured that the distance between the outer wall of the mating portion 21 and the inner wall of the housing is more reasonable, so that demolding after the mating portion 21 and the housing are integrally formed can be facilitated, and the size of the brush bar 10 is not excessively large.

Preferably, the value range of a is between 2.5mm and 3.5mm, so that the demolding after the integral forming of the plug-in matching part 21 and the shell can be conveniently realized by reasonably controlling the interval between the outer wall of the plug-in matching part 21 and the inner wall of the shell, and the oversize of the brush rod 10 can not be caused.

In some embodiments, as shown in FIG. 2, the wall thickness b of the mating portion 21 is 1.2mm-2.5mm.

For example, when the wall thickness b of the insertion portion 21 is set to be within the above range, it is possible to ensure that the insertion portion 21 has sufficient structural strength, when the wall thickness b of the insertion portion 21 is set to be within the above range, or when the wall thickness b of the insertion portion 21 is set to be 1.3mm, or when the wall thickness b of the insertion portion 21 is set to be 1.5mm, or further, when the wall thickness b of the insertion portion 21 is set to be 2.3 mm.

In some embodiments, as shown in fig. 2 and 3, the mating portion 21 includes: a flat plate 211 and an arc plate 212.

As shown in fig. 3, the arc plate 212 is disposed on one side of the thickness of the flat plate 211, the axis of the arc plate 212 is disposed on one side of the arc plate 212 facing the flat plate 211, the insertion hole 213 is defined between the arc plate 212 and the flat plate 211, the hole wall of the insertion hole 213 is broken at a position between the arc plate 212 and the flat plate 211, the inner side wall of the arc plate 212 defines an arc portion 214, and the inner side wall of the flat plate 211 defines a flat portion 215.

Therefore, by arranging the flat plate 211, the flat part 215 is conveniently limited by the inner side wall of the flat plate 211, and the connecting structure 20 and the output shaft 210 can be locked by the interference fit of the flat part 215 and the output shaft 210, so that the torque transmission between the output shaft 210 and the brush head 100 is realized, and meanwhile, the flat part 215 is arranged to play a foolproof role.

As shown in fig. 6 and 7, the flat plate 211 has a locking structure 30 on an inner side wall thereof adapted to be locked to the output shaft 210.

Therefore, by arranging the clamping structure 30, the flat plate 211 can be connected with the output shaft 210 in a clamping manner, so that the connection stability of the output shaft 210 and the brush head 100 is enhanced, and the flat plate 211 is connected with the output shaft 210 in a clamping manner, so that the flat plate 211 and the output shaft 210 are convenient to detach, and the difficulty in assembling and disassembling of the flat plate 211 and the brush head is reduced.

The fastening structure 30 may be configured as a hook 31 as shown in fig. 8, or the fastening structure 30 may be configured as a slot 32 as shown in fig. 9, which is not limited herein.

In some embodiments, as shown in fig. 6, a side wall surface of the flat plate 211 facing away from the insertion hole 213 is an outer side wall of the flat plate 211, the connection portion 22 includes a first support rib 221 provided between the outer side wall of the flat plate 211 and an inner wall of the housing, an extension dimension of the first support rib 221 in a direction from the insertion portion 21 to the housing is a width of the first support rib 221, and at an end portion of the corresponding flat plate 211 facing away from the head portion 12, the width of the first support rib 221 becomes zero or gradually decreases in a direction from the head portion 12 to the rod portion 11.

Therefore, by arranging the first supporting ribs 221, the supporting effect on the flat plate 211 can be enhanced through the first supporting ribs 221, the problem that the flat plate 211 breaks when the brush head 100 falls is avoided, and the width of the first supporting ribs 221 becomes zero at the end part of the corresponding flat plate 211 far away from the head 12 or gradually decreases along the direction from the head 12 to the rod 11, so that one end of the flat plate 211 far away from the head 12 can have a certain activity, when the flat part 215 is in interference fit with the output shaft 210, the flat plate 211 can be ensured to have a certain deformation capacity, and the interference fit of the flat part 215 and the flat part of the output shaft 210 is facilitated, so that the structure is not easy to break when the structure is deformed.

For example, the flat plate 211 may be an elastic structure, the clamping structure 30 is disposed on the elastic structure, and a first supporting rib 221 is disposed at the back of the elastic structure, when the output shaft 210 extends into the insertion hole 213 to be in clamping engagement with the clamping structure 30, the flat plate 211 is deformed first, so as to ensure that the output shaft 210 can extend into the insertion hole 213, and then the flat plate 211 resets and is in interference fit with the flat position of the output shaft 210. At this time. The first supporting rib 221 can play a role in supporting and stabilizing the elastic structure, so that the risk of breakage of the elastic structure can be reduced when the elastic structure falls.

As shown in fig. 8 and 9, a portion of the flat plate 211 away from the head portion 12 is configured as a cantilever section 2111, and the cantilever section 2111 has a dimension in the length direction of the shaft portion 11 of the cantilever section 2111 of 5mm to 15mm in length c of the cantilever section 2111.

For example, when the length c of the cantilever portion 2111 is 6mm, or the length c of the cantilever portion 2111 is 8mm, or the length c of the cantilever portion 2111 is 10mm, that is, when the length c of the cantilever portion 2111 satisfies the above-mentioned range, the flat plate 211 is not easy to break due to falling while ensuring elasticity.

As shown in fig. 2, a side wall surface of the arc plate 212 facing away from the insertion hole 213 is an outer side wall of the arc plate 212, the connection portion 22 includes a second support rib 222 disposed between the outer side wall of the arc plate 212 and an inner wall of the housing, an extension dimension of the second support rib 222 in a direction from the insertion portion 21 to the housing is a width of the second support rib 222, and a width d of an end of the second support rib 222 facing away from the head portion 12 is 5mm-15mm.

Therefore, the second supporting rib 222 is provided so as to enhance the structural stability of the arc plate 212, and the width d of the end, away from the head 12, of the second supporting rib 222 is 5mm-15mm, for example, the width d of the end, away from the head 12, of the second supporting rib 222 is 6mm, or the width d of the end, away from the head 12, of the second supporting rib 222 is 8mm, or the width d of the end, away from the head 12, of the second supporting rib 222 is 10mm, that is, when the width d of the end, away from the head 12, of the second supporting rib 222 is valued within the above-mentioned range, it is able to ensure that the arc plate 212 has sufficient structural strength.

In some embodiments, as shown in FIG. 3, the radius e of the mating hole 213 is 1.8mm-2.2mm.

For example, the radius e=1.9 mm of the insertion hole 213, or the radius e=2 mm of the insertion hole 213, or the radius e=2.1 mm of the insertion hole 213, i.e. when the radius e of the insertion hole 213 is within the above-mentioned range, it is ensured that the insertion hole 213 is not too small, so as to meet the assembly requirement that the output shaft 210 extends into the insertion hole 213, and at the same time, it is ensured that the insertion hole 213 is not too large, so as to avoid the too large size of the brush rod 10.

In some embodiments, the cross-sectional area of at least a section of the stem 11 increases gradually in the direction from the head 12 to the stem 11.

Preferably, in the length direction of the shaft 11, from the end of the shaft 11 connected to the head 12 to the end of the shaft 11 engaged with the handle 200, the cross-sectional area of the shaft 11 gradually increases, i.e. the end of the shaft 11 connected to the output shaft 210 of the handle 200 is larger in size, so as to facilitate the enhancement of the structural strength of the shaft 11 and the reduction of the risk of falling damage of the shaft 11.

Further, the cross-sectional area of the end of the shaft 11 connected to the head 12 is S1, and the cross-sectional area of the end of the shaft 11 far away from the head 12 is S2, wherein S1/S2 is 1:10-1:2.

From this, make the cross-sectional area of the one end that pole portion 11 links to each other with head 12 less to in order to reduce the overall dimension of pole portion 11, do benefit to the miniaturized design of realizing pole portion 11, and the cross-sectional area of the one end of keeping away from head 12 is great, is convenient for set up connection structure 20 in the one end that pole portion 11 kept away from head 12, and make the cross-sectional area of the one end that pole portion 11 links to each other with the output shaft 210 of handle 200 great, thereby be convenient for strengthen the structural strength of pole portion 11, do benefit to the risk that reduces pole portion 11 and fall the damage.

In some embodiments, as shown in fig. 7, the first positioning portion 23 forms a stop portion 231, and the stop portion 231 has a stop surface 232 adapted to stop the output shaft 210.

Therefore, when the output shaft 210 extends into the insertion hole 213, the output shaft 210 can abut against the abutment surface 232, so as to limit the output shaft 210 to move towards the direction close to the head 12, that is, the abutment portion 231 has the effect of limiting and positioning the output shaft 210, so that the brush rod 10 is prevented from contacting the handle 200, and noise and vibration are reduced.

Further, as shown in fig. 7, the abutment surface 232 is adapted to abut against a side axial end of the output shaft 210 remote from the handle 200, and a maximum distance L between the head 12 and the abutment surface 232 in a length direction of the shaft 11 is 17.5mm to 18.5mm.

It should be noted that, when the maximum distance between the head 12 and the abutment surface 232 is greater than the range, the distance between the abutment surface 232 and the opening of the insertion hole 213 is smaller, so that when the output shaft 210 of the handle 200 is connected to the brush head 100, the portion of the output shaft 210 extending into the insertion hole 213 is shorter, so that the output shaft 210 cannot play a certain structural reinforcing role, and because the length of the output shaft 210 extending into the brush rod 10 is shorter, when the toothbrush falls, the distance from the free end of the brush head 100 to the output shaft 210 is larger, so that the moment arm is longer, and the brush rod 10 is easily broken.

Therefore, in the present utility model, the maximum distance L between the head 12 and the abutment surface 232 is controlled within the above-mentioned range, for example, the maximum distance L between the head 12 and the abutment surface 232 is 17.6mm, or the maximum distance L between the head 12 and the abutment surface 232 is 17.9mm, or the maximum distance L between the head 12 and the abutment surface 232 is 18.2mm, that is, when the maximum distance L between the head 12 and the abutment surface 232 is controlled within the above-mentioned range, the connection stability between the output shaft 210 and the brush head 100 can be ensured, and the output shaft 210 can have a certain structural reinforcement function.

In some embodiments, as shown in fig. 2, a groove 41 or a rib 42 is formed on an inner wall of the insertion hole 213, the groove 41 is adapted to cooperate with a limit rib on a peripheral wall of the output shaft 210, and the rib 42 is adapted to be interference-fitted with the peripheral wall of the output shaft 210.

For example, the inner wall of the insertion hole 213 is formed with a groove 41, and the groove 41 is adapted to cooperate with a limit rib on the peripheral wall of the output shaft 210, so that the connection stability of the output shaft 210 and the insertion hole 213 can be enhanced, the torque transmission between the output shaft 210 and the brush head 100 is facilitated, and the brush head 100 is effectively prevented from deflecting.

Or the insertion hole 213 has a rib 42 formed on an inner wall thereof, the rib 42 being adapted to be interference-fitted with a peripheral wall of the output shaft 210. In this way, the connection stability of the output shaft 210 and the insertion hole 213 can be enhanced, which is beneficial to the transmission of torque between the output shaft 210 and the brush head 100, and effectively avoids the deflection of the brush head 100.

Still alternatively, as shown in fig. 2, a groove 41 and a rib 42 are formed on the inner wall of the insertion hole 213, the groove 41 is adapted to cooperate with a limit rib on the peripheral wall of the output shaft 210, and the rib 42 is adapted to be interference-fitted with the peripheral wall of the output shaft 210. In this way, the connection stability of the output shaft 210 and the insertion hole 213 can be enhanced, which is beneficial to the transmission of torque between the output shaft 210 and the brush head 100, and effectively avoids the deflection of the brush head 100.

In some embodiments, the connection structure 20 further includes a second positioning portion on a side of the first positioning portion 23 remote from the head 12, the second positioning portion being adapted to be in positioning engagement with the output shaft 210 to inhibit movement of the output shaft 210 in a direction away from the head 12.

Therefore, by arranging the second positioning portion, when the output shaft 210 extends into the insertion hole 213, the output shaft 210 is fixed by the positioning fit of the second positioning portion and the output shaft 210, so as to avoid the output shaft 210 moving in a direction away from the head 12, that is, avoid the output shaft 210 from being separated from the insertion hole 213, and facilitate the enhancement of the connection stability of the output shaft 210 and the brush head 100.

Further, the second positioning portion is a clamping structure 30 and is adapted to be in clamping engagement with the output shaft 210.

Therefore, the difficulty of positioning and matching between the second positioning portion and the output shaft 210 is reduced, and the detachable matching and separation between the second positioning portion and the output shaft 210 are facilitated, so that the loading and unloading difficulty of the second positioning portion and the output shaft 210 is reduced.

The utility model also proposes an electric toothbrush 1000.

As shown in fig. 10, an electric toothbrush 1000 according to an embodiment of the present utility model includes: handle 200 and brush head 100 of any of the embodiments described above.

Specifically, as shown in fig. 11, the handle 200 includes an output shaft 210, the output shaft 210 extends into the insertion hole 213 and is in positioning engagement with the first positioning portion 23, and a flat portion of the output shaft 210 is in interference engagement with a flat portion 215 of the insertion hole 213.

Therefore, the output shaft 210 can extend to the insertion hole 213 to realize connection and fixation of the handle 200 and the brush head 100, and the output shaft 210 is matched with the first positioning portion 23 in a positioning manner, so that the output shaft 210 can be positioned, the brush rod 10 is prevented from contacting the handle 200, noise or vibration and the like can be reduced, and meanwhile, due to interference fit between the flat position of the output shaft 210 and the flat position portion 215, clamping and locking of the brush rod 10 and the output shaft 210 and torque transmission can be realized.

According to the electric toothbrush 1000 of the embodiment of the utility model, the connecting structure 20 of the brush head 100 is integrally formed with the rod 11, the connecting structure 20 defines the insertion hole 213, the output shaft 210 of the handle 200 can extend into the insertion hole 213 to connect the handle 200 with the rod 11, thus the size limitation of the output shaft 210 of the handle 200 can be reduced, the assembly process is convenient to simplify, the assembly difficulty is reduced, the connecting structure 20 and the handle 200 can be prevented from being separated so as to be beneficial to the daily use of a user, meanwhile, the brush rod 10 is prevented from contacting the handle 200 by arranging the first positioning part 23, the noise and vibration are reduced, and the clamping and locking of the connecting structure 20 to the output shaft 210 are realized by arranging the flat position part 215 and the flat position interference fit of the output shaft 210, so that the torque transmission between the two is facilitated.

In some embodiments, as shown in fig. 10, the end of the handle 200 facing the brush head 100 is a first plane 201, the end of the brush head 100 facing the handle 200 is a second plane 101, the first plane 201 is in clearance fit with the second plane 101, and as shown in fig. 10, the output shaft 210 extends out of the first plane 201 and from the second plane 101 into the mating hole 213.

Thus, by providing the first plane 201 and the second plane 101 such that when the output shaft 210 of the handle 200 is connected to the brush head 100, the output shaft 210 can extend into the second plane 101 to be engaged with the insertion hole 213, at this time, the first plane 201 and the second plane 101 are in clearance fit, so as to avoid direct contact between the first plane 201 of the handle 200 and the second plane 101 of the brush head 100, thereby facilitating avoiding noise generated by interference between the two.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (23)

1. A brush head (100) for an electric toothbrush, comprising:

a brush bar (10), the brush bar (10) comprising a stem (11) and a head (12), the head (12) being provided at one end of the length of the stem (11), and the head (12) being adapted to provide a tooth cleaning element (13); and

the connecting structure (20), connecting structure (20) with pole portion (11) integrated into one piece, just connecting structure (20) are limited and are inserted hole (213), along the length direction of pole portion (11) insert the both ends of hole (213) and be first end and second end respectively, first end is located keep away from in second end head (12) one side, first end is opened in order to be suitable for output shaft (210) of handle (200) of electric toothbrush (1000) stretches into insert hole (213), insert the inner wall of hole (213) including arc surface portion (214) and flat position portion (215) that arrange along the circumference of hole (213), flat position portion (215) be suitable for with the flat position interference fit of output shaft (210), connecting structure (20) include first location portion (23) in inserting hole (213), first location portion (23) be suitable for with output shaft (210) location fit in order to restrain output shaft (210) orientation head (12) removal.

2. The brush head (100) of an electric toothbrush according to claim 1, characterized in that the housing interior of the stem (11) defines a cavity (111), a side of the cavity (111) facing away from the head (12) in the length direction of the stem (11) being open, the connecting structure (20) comprising a mating portion (21) and a connecting portion (22), the mating portion (21) defining the mating hole (213), the mating portion (21) being provided in the cavity (111) and spaced apart from the housing, the connecting portion (22) being connected between an outer wall of the mating portion (21) and an inner wall of the housing.

3. The brush head (100) of an electric toothbrush according to claim 2, wherein the connecting portion (22) includes a plurality of support ribs disposed at intervals along the circumferential direction of the insertion hole (213).

4. A brush head (100) of an electric toothbrush according to claim 3, characterized in that the extension of the support rib in the direction from the mating portion (21) to the housing is the width of the support rib, the width of at least one section of at least one support rib increasing gradually in the direction from the head portion (12) to the stem portion (11).

5. The brush head (100) of an electric toothbrush according to claim 2, characterized in that the distance between the outer wall of the mating part (21) and the inner wall of the housing increases gradually in the direction from the head (12) to the stem (11), either first unchanged and then increased or first increased and then unchanged.

6. The brush head (100) of an electric toothbrush according to claim 5, characterized in that the cross-sectional area of the outer wall of the mating portion (21) gradually decreases in a direction from the head portion (12) to the stem portion (11); and/or the cross-sectional area of the inner wall of the housing increases gradually in a direction from the head portion (12) to the stem portion (11).

7. The brush head (100) of an electric toothbrush according to claim 2, characterized in that the distance a between the outer wall of the plug-in part (21) and the inner wall of the housing is 2mm-4mm at the open side of the cavity (111).

8. The brush head (100) of an electric toothbrush according to claim 2, characterized in that the wall thickness b of the insert part (21) is 1.2mm-2.5mm.

9. The brush head (100) of an electric toothbrush according to claim 2, wherein the mating portion (21) comprises: flat position board (211) and arc (212), arc (212) are located thickness one side of flat position board (211), the axis of arc (212) is located arc (212) face towards one side of flat position board (211), insert hole (213) are limited arc (212) with between flat position board (211), insert hole (213)'s pore wall be in arc (212) with the position disconnection between flat position board (211), the inside wall of arc (212) is limited cambered surface portion (214), the inside wall of flat position board (211) is limited flat position portion (215).

10. The brush head (100) of an electric toothbrush according to claim 9, characterized in that the flat plate (211) has a clamping structure (30) on an inner side wall adapted to be in clamping engagement with the output shaft (210).

11. The brush head (100) of an electric toothbrush according to claim 9, wherein a side wall surface of the paddle (211) facing away from the insertion hole (213) is an outer side wall of the paddle (211), the connecting portion (22) includes a first support rib (221) provided between the outer side wall of the paddle (211) and an inner wall of the housing, an extension dimension of the first support rib (221) in a direction from the insertion portion (21) to the housing is a width of the first support rib (221), and a width of the first support rib (221) becomes zero or gradually decreases in a direction from the head (12) to the stem (11) at an end portion of the paddle (211) facing away from the head (12).

12. The brush head (100) of an electric toothbrush according to claim 10, characterized in that a portion of the flat plate (211) remote from the head (12) is configured as a cantilever section (2111), a dimension of the cantilever section (2111) in a length direction of the stem (11) is a length of the cantilever section (2111), and a length c of the cantilever section (2111) is 5mm to 15mm.

13. The brush head (100) of an electric toothbrush according to claim 10, wherein a side wall surface of the arcuate plate (212) facing away from the insertion hole (213) is an outer side wall of the arcuate plate (212), the connecting portion (22) includes a second support rib (222) provided between the outer side wall of the arcuate plate (212) and an inner wall of the housing, an extension dimension of the second support rib (222) in a direction from the insertion portion (21) to the housing is a width of the second support rib (222), and a width d of an end of the second support rib (222) facing away from the head (12) is 5mm to 15mm.

14. The brush head (100) of an electric toothbrush according to any one of claims 1-13, wherein the insertion hole (213) has a radius e of 1.8mm-2.2mm.

15. The brush head (100) of an electric toothbrush according to any one of claims 1-13 wherein the cross-sectional area of at least a section of the stem (11) increases gradually in a direction from the head (12) to the stem (11).

16. The brush head (100) of an electric toothbrush according to claim 15 wherein the cross-sectional area of the end of the stem (11) connected to the head (12) is S1 and the cross-sectional area of the end of the stem (11) remote from the head (12) is S2, wherein S1/S2 is 1:10-1:2.

17. The brush head (100) of an electric toothbrush according to any one of claims 1-13, characterized in that the first positioning portion (23) forms a stop portion (231), the stop portion (231) having a stop surface (232) adapted to stop the output shaft (210).

18. The brush head (100) of an electric toothbrush according to claim 17, characterized in that the abutment surface (232) is adapted to abut against a side axial end of the output shaft (210) remote from the handle (200), the maximum distance L between the head (12) and the abutment surface (232) being 17.5mm-18.5mm in the length direction of the stem (11).

19. The brush head (100) of an electric toothbrush according to any one of claims 1-13, characterized in that a groove (41) or a bead (42) is formed on an inner wall of the insertion hole (213), the groove (41) being adapted to cooperate with a limit bead on a peripheral wall of the output shaft (210), the bead (42) being adapted to be interference-fitted with the peripheral wall of the output shaft (210).

20. The brush head (100) of an electric toothbrush according to any one of claims 1-13 wherein the connecting structure (20) further comprises a second positioning portion located on a side of the first positioning portion (23) remote from the head (12), the second positioning portion being adapted to be in positioning engagement with the output shaft (210) to inhibit movement of the output shaft (210) in a direction away from the head (12).

21. The brush head (100) of an electric toothbrush according to claim 20, wherein the second positioning portion is a snap-fit structure (30) and adapted to snap-fit with the output shaft (210).

22. An electric toothbrush (1000), comprising: handle (200) and brush head (100) according to any of claims 1-21, the handle (200) comprising an output shaft (210), the output shaft (210) extending into the mating hole (213) and being in a positioning fit with the first positioning portion (23), and the flat of the output shaft (210) being in an interference fit with the flat portion (215) of the mating hole (213).

23. The electric toothbrush (1000) according to claim 22, wherein an end of the handle (200) facing the brush head (100) is a first plane (201), an end of the brush head (100) facing the handle (200) is a second plane (101), the first plane (201) is in clearance fit with the second plane (101), and the output shaft (210) extends out of the first plane (201) and from the second plane (101) into the mating hole (213).