CN218739216U

CN218739216U - Brush head assembly of electric toothbrush and electric toothbrush

Info

Publication number: CN218739216U
Application number: CN202220701153.9U
Authority: CN
Inventors: 叶洪新
Original assignee: Shenzhen Shuye Innovation Technology Co ltd
Current assignee: Shenzhen Shuye Innovation Technology Co ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2023-03-28
Anticipated expiration: 2032-03-29

Abstract

The embodiment of the application discloses a brush head assembly of an electric toothbrush and the electric toothbrush, wherein a brush head of the brush head assembly of the electric toothbrush comprises a brush head main body and a brushing part, the brush head main body comprises a head part and a rod part connected with the head part, in the axial direction of the rod part, the length of the rod part is less than or equal to that of the head part, and the maximum width of the cross section of the rod part is less than that of the cross section of the head part; the buckle assembly comprises an elastic buckle and a metal buckle sleeve sleeved on the periphery of the elastic buckle, and the elastic buckle is provided with a body part and a buckle part; a deformation space is formed between the buckling part and the metal buckling sleeve. The brush head main body is injected and coated on the periphery of the metal buckle sleeve, and at least part of the buckle assembly is positioned on the rod part. The end face of the rod part far away from the head part is provided with an inserting hole, the inserting hole is arranged corresponding to the elastic buckle, and the connecting shaft extends into the body part through the inserting hole and is clamped with the buckle part. The utility model discloses electric toothbrush's first subassembly of brush can be at the overhead quick assembly disassembly who realizes the brush head of little volume brush.

Description

Brush head assembly of electric toothbrush and electric toothbrush

Technical Field

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

Background

With the gradual improvement of the quality of life, more and more users use the electric toothbrush. Electric toothbrush includes interconnect's handle and brush head, and the brush head is provided with the motor including the head of installing the scrubbing portion and the pole portion that is used for connecting the motor shaft in the handle, and the motor shaft stretches out the handle and with the pole portion fixed connection of brush head.

The cross-sectional dimension of the part of the rod part close to the brushing part needs to be designed to be smaller so as to avoid that the overlarge rod part extends into the oral cavity to influence the use experience of a user. And because the cross section size of the part of the rod part close to the brushing part is small, the part is difficult to be in a structure which is detachably matched with the motor shaft. At present, the rod part is usually extended, so that the length of the rod part is far greater than that of the head part, the cross section of the part of the rod part far away from the brushing part is larger in size, and the part of the rod part far away from the brushing part and larger in size is of a structure detachably matched with the motor shaft. Therefore, the whole brush head of the conventional electric toothbrush is long and large in size, so that material waste can be caused, and the packaging of the brush head is not facilitated.

The above is only for the purpose of assisting understanding of the technical solution of the present invention, and does not represent an admission that the above is the prior art.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present invention provides a brush head assembly of an electric toothbrush and an electric toothbrush, which aims to solve the technical problem of the brush head of the electric toothbrush that is larger in size.

In order to achieve the above purpose, the brush head component of the electric toothbrush provided by the utility model comprises a connecting shaft, a brush head and a buckle component, wherein the brush head is detachably connected with one end of the connecting shaft,

the brush head comprises a brush head body and a brushing part, the brush head body comprises a head part and a rod part connected with the head part, the length of the rod part is less than or equal to that of the head part in the axial direction of the rod part, and the maximum width W1 of the cross section of the rod part is less than the maximum width W2 of the cross section of the head part; the brushing part is fixedly arranged on the head part;

the buckle assembly comprises an elastic buckle and a metal buckle sleeve sleeved on the periphery of the elastic buckle, the elastic buckle is provided with a body part and a buckle part connected to the body part, and the body part is arranged in a clearance way on one side of the buckle part, which is far away from the metal buckle sleeve; a deformation space is formed between the buckling part and the metal buckling sleeve;

the brush head main body is injected and coated on the periphery of the metal buckle sleeve, and at least part of the buckle component is positioned on the rod part;

the end face of the rod part, which is far away from the head part, is provided with an inserting hole, the inserting hole is arranged corresponding to the elastic buckle, and the connecting shaft extends into the avoidance space of the body part through the inserting hole and is clamped with the buckle part.

In an embodiment, the body portion is arranged in a cylindrical shape and sleeved on the periphery of the connecting shaft, a clamping window is formed in the body portion, the clamping portion comprises a first elastic arm and a second elastic arm which are connected along the axial direction of the connecting shaft, one ends of the first elastic arm and the second elastic arm, which are deviated from each other, are connected to the edge of the clamping window, and the first elastic arm and the second elastic arm are arranged in an included angle manner in a way of facing away from the metal clamping sleeve; the connecting shaft is provided with a clamping groove matched with the clamping part corresponding to the clamping part.

In one embodiment, the clamping groove is arranged around the outer peripheral wall of the connecting shaft; and the inner wall surface of the metal buckle sleeve is provided with expansion grooves corresponding to the first elastic arm and the second elastic arm.

In one embodiment, the expansion groove surrounds the inner circumferential wall of the metal snap sleeve, and an upper wall surface and a lower wall surface of the expansion groove in the axial direction of the connecting shaft are obliquely arranged.

In one embodiment, an included angle between a wall surface of the first elastic arm facing the metal buckle sleeve and a wall surface of the second elastic arm facing the metal buckle sleeve is greater than 90 degrees and smaller than 165 degrees; and/or the first elastic arm is arranged close to the head, the second elastic arm is arranged far away from the head, and the length of the first elastic arm is smaller than that of the second elastic arm in the axial direction of the connecting shaft.

In an embodiment, the first elastic arm and the second elastic arm are spaced from the two peripheral edges of the fastening window in the circumferential direction of the main body.

In one embodiment, the connecting shaft comprises a shaft main body and an insertion boss, the shaft main body is provided with a clamping groove matched with the clamping part corresponding to the clamping part, and the insertion boss is connected to the end face, adjacent to the head, of the shaft main body; the toothbrush head comprises a toothbrush head body and is characterized in that a clamping cavity and an inserting cavity which are communicated with each other are formed in the toothbrush head body, an inserting hole is communicated with the inserting cavity, the inserting cavity and the inserting hole are respectively arranged on two sides of the clamping cavity in the axial direction, the metal clamping buckle sleeve is installed in the clamping cavity in an adaptive mode, and the inserting boss is limited in the circumferential direction of the connecting shaft and is inserted in the inserting cavity.

In an embodiment, the main body includes a barrel and a barrel bottom covering one end of the barrel adjacent to the head, an opening is formed at one end of the barrel away from the head, the barrel is sleeved on the periphery of the shaft main body, and a through hole adapted to the insertion boss is formed at the barrel bottom.

In one embodiment, the end face of the shaft main body adjacent to the brush head forms a guide inclined plane, the guide inclined plane is arranged outwards from the axis of the connecting shaft and obliquely deviates from the head, and the clamping groove is arranged adjacent to the guide inclined plane.

In one embodiment, the ratio of W1 to W2 is greater than or equal to 0.4 and less than or equal to 0.6.

The utility model also provides an electric toothbrush, which comprises a handle, a motor and a brush head component of the electric toothbrush, wherein the brush head component of the electric toothbrush comprises a connecting shaft, a brush head and a buckle component, the brush head is detachably connected with one end of the connecting shaft,

the brush head comprises a brush head body and a brushing part, the brush head body comprises a head part and a rod part connected with the head part, in the axial direction of the rod part, the length of the rod part is less than or equal to that of the head part, and the maximum width W1 of the cross section of the rod part is less than the maximum width W2 of the cross section of the head part; the brushing part is fixedly arranged on the head part;

the end surface of the rod part far away from the head part is provided with an inserting hole, the inserting hole is arranged corresponding to the elastic buckle, and the connecting shaft extends into the clearance of the body part through the inserting hole and is clamped with the buckle part;

the motor is fixedly installed in the handle, the driving end of the motor is fixedly connected with one end, far away from the brush head, of a connecting shaft of a brush head assembly of the electric toothbrush, and the connecting shaft is close to one end, far away from the brush head, of the brush head and extends out of the handle.

The utility model discloses electric toothbrush's brush head subassembly is through making brush head main part include the head and with the pole portion that the head links to each other in the axial of pole portion, the length of pole portion is less than or equal to the length of head, just the maximum width of the cross section of pole portion is less than the maximum width of the cross section of head. The buckle assembly comprises an elastic buckle and a metal buckle sleeve sleeved on the periphery of the elastic buckle, the elastic buckle is provided with a body part and a buckle part connected to the body part, and the body part is arranged in a clearance way on one side of the buckle part, which is far away from the metal buckle sleeve; a deformation space is formed between the buckling part and the metal buckling sleeve. The brush head main body is molded by injection and coated on the periphery of the metal buckle sleeve, and at least part of the buckle component is positioned on the rod part. The end face of the rod part, which is far away from the head part, is provided with an inserting hole, the inserting hole is arranged corresponding to the elastic buckle, and the connecting shaft extends into the avoidance space of the body part through the inserting hole and is clamped with the buckle part.

So, make buckle subassembly need not to install to the brush head main part from the spliced eye of pole portion terminal surface in, and then the dimensional requirement to the spliced eye is littleer, then compare in the mode of installing buckle subassembly from the spliced eye, the requirement is little to the cross section size of pole portion, make the length and the cross section size of whole pole portion all can set up littleer, when not influencing user's use experience, make the length of whole brush head short, small, then can effectively reduce material cost, and be convenient for the packing of whole brush head. Meanwhile, the connecting shaft can be clamped with the clamping part by stretching into the inserting hole, so that the connecting shaft and the brush head can be more conveniently disassembled and assembled, and the brush head can be easily disassembled and replaced freely.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below 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 creative efforts.

FIG. 1 is a schematic view of an embodiment of a brushhead assembly of the electric toothbrush of the present invention;

FIG. 2 is a back side view of the brushhead assembly of the electric toothbrush of FIG. 1;

FIG. 3 is an exploded view of the brushhead assembly of the power toothbrush of FIG. 1;

FIG. 4 is a front elevational view of the brushhead assembly of the electric toothbrush of FIG. 2;

FIG. 5 is a cross-sectional view taken along line V-V of FIG. 4;

FIG. 6 is an enlarged view of a portion of FIG. 5 at A;

FIG. 7 is a cross-sectional view of the brushhead assembly of the electric toothbrush of the present invention from another angle;

FIG. 8 is a schematic view of an embodiment of a snap assembly of the brush head assembly of the electric toothbrush of the present invention;

FIG. 9 is a schematic structural view of an embodiment of the electric toothbrush of the present invention;

fig. 10 is an angled cross-sectional view of the powered toothbrush of fig. 9.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)	Reference numerals	Name (R)
						100	Brush head assembly for electric toothbrush	124	Plug hole	136	Via holes
110	Connecting shaft	125	Clamping cavity	137	Fastening part
						111	Clamping groove	126	Plug-in cavity	138	First elastic arm
112	Shaft body	127	Brushing part	139	Second elastic arm
						113	Guide inclined plane	130	Buckle assembly	140	Metal buckle sleeve
114	Plug-in boss	131	Elastic button	141	Capacity expansion groove
						120	Brush head	132	Body part	150	Space of deformation
121	Brush head main body	133	Fastening window	200	Handle (CN)
						122	Head part	134	Barrel body	300	Electric machine
123	Rod part	135	Barrel bottom

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a brush head assembly of an electric toothbrush, which is used for the electric toothbrush.

In an embodiment of the present invention, referring to fig. 1 to 5, the brush head assembly 100 of the electric toothbrush includes a connecting shaft 110, a brush head 120 and a buckle assembly 130, the brush head 120 is detachably connected to one end of the connecting shaft 110, wherein the brush head 120 includes a brush head body 121 and a brushing part 127, the brush head body 121 includes a head part 122 and a rod part 123 connected to the head part 122, in an axial direction of the rod part 123, a length of the rod part 123 is less than or equal to a length of the head part 122, and a maximum width W1 of a cross section of the rod part 123 is less than a maximum width W2 of a cross section of the head part 122; the brush unit 127 is fixedly attached to the head 122. The buckle assembly 130 comprises an elastic buckle 131 and a metal buckle sleeve 140 sleeved on the periphery of the elastic buckle 131, the elastic buckle 131 is provided with a body part 132 and a buckle part 137 connected to the body part 132, and the body part 132 is arranged in a clearance manner on one side of the buckle part 137, which is far away from the metal buckle sleeve 140; a deformation space 150 is formed between the locking portion 137 and the metal locking sleeve 140. The brush head body 121 is injection molded and wrapped around the metal snap sleeve 140, and the snap assembly 130 is at least partially located on the shaft 123. The end surface of the rod portion 123 far away from the head portion 122 is provided with an insertion hole 124, the insertion hole 124 is arranged corresponding to the elastic buckle 131, and the connecting shaft 110 extends into the clearance of the body portion 132 through the insertion hole 124 and is clamped with the buckling portion 137.

In this embodiment, the connecting shaft 110 may be a driving shaft of the motor 300 of the electric toothbrush, or may be a separate shaft connected to the driving shaft of the motor 300 of the electric toothbrush, which is not particularly limited herein. The brushing part 127 may be a hair bundle, a silica gel, or the like, and only needs to clean teeth. The brushing part 127 can be fixedly mounted on the head 122 of the head body 121 by means of gluing, clamping, or the like. Generally, in order to secure the coupling strength, the head portion 122 and the shaft portion 123 of the head main body 121 are integrally formed. The head 122 is connected to one end of the shaft 123. The head 122 is generally flat and may have a variety of shapes, for example, the head 122 may have a circular, oval, etc. longitudinal cross-section.

In the axial direction of the shaft part 123, the length of the shaft part 123 is less than or equal to that of the head part 122, compared with the existing products, the length of the shaft part 123 is shorter, so that the length of the whole brush head 120 is short, the volume is small, the material cost can be effectively reduced, and meanwhile, the whole brush head 120 is convenient to package. The cross-sectional maximum width W1 of the shaft portion 123 is less than the cross-sectional maximum width W2 of the head portion 122, i.e., the width of the maximum cross-section of all cross-sections of the shaft portion 123 is less than the width of the maximum cross-section of all cross-sections of the head portion 122. Thus, the transverse dimension of the rod part 123 is small, and the phenomenon that the user experience is affected by the fact that the overlarge rod part 123 extends into the oral cavity can be avoided.

The elastic buckle 131 and the buckle sleeve can be made of metal. For example, the elastic buckle 131 and the buckle sleeve are made of 304 stainless steel, copper, iron, and the like. So, make whole buckle subassembly 130 all adopt the metal material, then its elasticity recovers the effect better, and corrosion resisting capability is higher. The metal buckle sleeve 140 may be configured in a cylindrical shape to be sleeved on the periphery of the elastic buckle 131, and the metal buckle sleeve 140 and the body portion 132 of the elastic buckle 131 may be fixedly connected, such as an interference fit, or may be rotatably connected. The main body 132 may be cylindrical, semi-cylindrical or in other shapes, and may be connected to the metal buckle 140 and used for mounting the buckle 137. The main body 132 is disposed in a clearance at a side of the fastening portion 137 away from the metal buckle sleeve 140, so that the clearance can be inserted by the connecting shaft 110. The main body 132 may be cylindrical to form an internal clearance, or the clearance may be implemented in other manners, which is not limited herein. A deformation space 150 is formed between the fastening portion 137 and the metal fastening sleeve 140, and when the connecting shaft 110 extends into the space of the body portion 132 through the insertion hole 124 to be fastened with the fastening portion 137 and the connecting shaft 110 needs to be pulled out, the deformation space 150 allows the fastening portion 137 to deform, so that the connecting shaft 110 and the fastening assembly 130 can be inserted and pulled out.

The brush head main body 121 is injection molded and coated on the periphery of the metal snap sleeve 140, that is, the snap assembly 130 is fixedly mounted in the brush head main body 121 by a secondary rubber coating (sleeve beer) manner. Therefore, the fastening assembly 130 does not need to be installed into the head main body 121 from the insertion hole 124, so that the insertion hole 124 is smaller and is matched with the connecting shaft 110, the installation gap between the insertion hole 124 and the connecting shaft 110 is small, and water, dirt and the like can be effectively prevented from entering the insertion hole 124 and the fastening assembly 130 through the gap between the connecting shaft 110 and the insertion hole 124. It can be understood that if the metal buckle sleeve 140 is not provided, the brush head main body 121 is directly injection-molded on the periphery of the elastic buckle 131, so that there is no elastic deformation space 150 between the elastic buckle 131 and the brush head main body 121, and the elastic buckle 131 and the connecting shaft 110 cannot be clamped. Having the catch assembly 130 at least partially located on the stem portion 123, the catch assembly 130 may be located only on the stem portion 123, or the catch assembly 130 may be located at the junction of the stem portion 123 and the head portion 122, i.e., the catch assembly 130 is located on both the stem portion 123 and the head portion 122. By making the buckle assembly 130 at least partially located on the rod portion 123, on one hand, the rod portion 123 is fully utilized to fix the buckle assembly 130 with the head main body 121, and on the other hand, the buckle assembly 130 is closer to the insertion hole 124, so that the opening depth of the insertion hole 124 can be reduced.

The brush head assembly 100 of the electric toothbrush of the present invention is configured such that the brush head body 121 includes the head part 122 and the rod part 123 connected to the head part 122, the length of the rod part 123 is less than or equal to the length of the head part 122 in the axial direction of the rod part 123, and the maximum width of the cross section of the rod part 123 is less than the maximum width of the cross section of the head part 122. The buckle assembly 130 comprises an elastic buckle 131 and a metal buckle sleeve 140 sleeved on the periphery of the elastic buckle 131, the elastic buckle 131 is provided with a body part 132 and a buckle part 137 connected to the body part 132, and the body part 132 is arranged in a clearance manner on one side of the buckle part 137, which is far away from the metal buckle sleeve 140; a deformation space 150 is formed between the locking portion 137 and the metal locking sleeve 140. The brush head body 121 is injection molded and wrapped around the metal snap sleeve 140, and the snap assembly 130 is at least partially located on the shaft 123. The end surface of the rod portion 123 far away from the head portion 122 is provided with an insertion hole 124, the insertion hole 124 is arranged corresponding to the elastic buckle 131, and the connecting shaft 110 extends into the clearance of the body portion 132 through the insertion hole 124 and is clamped with the buckling portion 137.

So for buckle assembly 130 need not to install to brush head main part 121 from the spliced eye 124 of pole portion 123 terminal surface in, and then the dimensional requirement to spliced eye 124 is littleer, then compare in the mode of installing buckle assembly 130 from spliced eye 124, the dimensional requirement to the cross section of pole portion 123 is little, make the length and the cross section size of whole pole portion 123 all can set up littleer, when not influencing user's use experience, make the length of whole brush head 120 short, small, then can effectively reduce material cost, and be convenient for the packing of whole brush head 120. Meanwhile, the connecting shaft 110 can be clamped with the clamping part by extending into the inserting hole 124, so that the connecting shaft 110 and the brush head 120 can be more conveniently disassembled and assembled, and the brush head 120 can be easily disassembled and replaced freely.

In an embodiment, referring to fig. 6 to 8, the main body 132 is disposed in a cylindrical shape to be sleeved on the periphery of the connecting shaft 110, the main body 132 is provided with a locking window 133, the locking portion 137 includes a first elastic arm 138 and a second elastic arm 139 connected along the axial direction of the connecting shaft 110, one end of the first elastic arm 138 and one end of the second elastic arm 139, which are away from each other, are connected to the edge of the locking window 133, and the first elastic arm 138 and the second elastic arm 139 are disposed at an included angle away from the metal locking sleeve 140; the connecting shaft 110 is provided with a clamping groove 111 corresponding to the buckling part 137.

In the embodiment, the main body 132 is disposed in a cylindrical shape, the main body 132 is provided with a fastening window 133, the fastening portion 137 is connected to the edge of the fastening window 133, and an inner cavity of the main body 132 disposed in the cylindrical shape forms a clearance for the connection shaft 110 to extend into. The inner diameter of the body 132 may be the same as the outer diameter of the connecting shaft 110, so that the body 132 is integrally fitted around the periphery of the body 132, and the body 132 may limit the movement of the connecting shaft 110 in the transverse direction, so as to implement the pre-positioning installation of the connecting shaft 110 and the body 132, and further make the clamping connection between the connecting shaft 110 and the fastening portion 137 more convenient and faster. In order to ensure the connection strength, optionally, the buckling part 137 is integrally formed with the body part 132. For convenience of description, it is defined that an end of the connecting shaft 110 axially close to the head 122 is up, and an end far from the head 122 is down; the first elastic arm 138 is defined as an elastic arm disposed above, and the second elastic arm 139 is defined as an elastic arm disposed below. The first elastic arm 138 and the second elastic arm 139 are disposed at an included angle back to the metal buckle 140, that is, the first elastic arm 138 is tilted toward the connecting shaft 110 from top to bottom, and the second elastic arm 139 is tilted toward the connecting shaft 110 from bottom to top. The deformation space 150 formed between the first and second

elastic arms

138 and 139 and the metal clip 140 is made larger. The locking groove 111 is a triangular groove adapted to the locking portion 137.

When the connecting shaft 110 is inserted into the body portion 132, the connecting shaft 110 pushes the second elastic arm 139, so that the first elastic arm 138 and the second elastic arm 139 deform toward the deformation space 150, and the connecting shaft 110 can be continuously inserted into the body portion 132, and when the body portion 132 moves to the position where the clamping groove 111 is matched with the buckling portion 137, the assembly of the body portion 132 and the clamping groove 111 is completed. When the connecting shaft 110 needs to be pulled out, the connecting shaft 110 will push the second elastic arm 139, so that the first elastic arm 138 and the second elastic arm 139 deform toward the deformation space 150, and the connecting shaft 110 can be pulled out from the body portion 132 smoothly. Therefore, the connection between the connection shaft 110 and the buckle assembly 130 is more stable, and the connection shaft 110 can be inserted and pulled more smoothly and conveniently.

Further, as shown in fig. 5 to 8, a catching groove 111 is provided around the outer circumferential wall of the connecting shaft 110; the inner wall surface of the metal snap-fit sleeve 140 is provided with an expansion groove 141 corresponding to the first elastic arm 138 and the second elastic arm 139. Through making joint groove 111 encircle the periphery wall setting of connecting axle 110, then joint groove 111 is the annular setting, so, the shaping of the joint groove 111 on the connecting axle 110 of being convenient for on the one hand, on the other hand makes each position on connecting axle 110 circumference all can realize with the joint of clamping part 137, and then convenience of customers operates. And the inner wall surface of the metal buckle sleeve 140 is provided with the expansion grooves 141 corresponding to the first elastic arm 138 and the second elastic arm 139, so that the deformation space 150 can be further enlarged, the deformable space of the buckle part 137 is larger, and the connection and the separation of the connection shaft 110 and the buckle part 137 can be realized more conveniently.

Further, the expansion groove 141 surrounds the inner circumferential wall of the metal snap sleeve 140, and an upper wall surface and a lower wall surface of the expansion groove 141 in the axial direction of the connecting shaft 110 are obliquely disposed. The expansion groove 141 is arranged around the inner peripheral wall of the metal buckle sleeve 140, so that the expansion groove 141 on the metal buckle sleeve 140 can be conveniently formed, the buckling parts 137 can be correspondingly arranged in all the circumferential directions of the expansion groove 141 of the metal buckle sleeve 140, the requirements on the assembly process of the metal buckle sleeve 140 and the elastic buckle 131 are smaller, and the assembly between the metal buckle sleeve 140 and the elastic buckle 131 is more convenient and faster.

The upper wall surface and the lower wall surface of the accommodating groove 141 in the axial direction of the connecting shaft 110 are inclined, that is, the upper wall surface and the lower wall surface of the accommodating groove 141 are both inclined toward the connecting shaft 110. The upper wall surface and the lower wall surface of the expansion groove 141 in the axial direction of the connecting shaft 110 are obliquely arranged, so that the upper wall surface and the lower wall surface of the expansion groove 141 can avoid deformation of the first elastic arm 138 and the second elastic arm 139, the deformation degree of the buckling part 137 in the expansion groove 141 is further larger, and stress concentration at the outer ends of the upper wall surface and the lower wall surface can be avoided. Meanwhile, when the connecting shaft 110 is inserted into or pulled out of the body portion 132, the inclined upper wall surface and the inclined lower wall surface of the expansion groove 141 do not obstruct the insertion or pulling out of the connecting shaft 110, so that the insertion or pulling out of the connecting shaft 110 is smoother and faster.

In an embodiment, referring to fig. 5 to 8 again, an included angle between the wall surface of the first elastic arm 138 facing the metal buckle sleeve 140 and the wall surface of the second elastic arm 139 facing the metal buckle sleeve 140 is greater than 90 degrees and smaller than 165 degrees.

In this embodiment, an included angle between the wall surface of the first elastic arm 138 facing the metal buckle sleeve 140 and the wall surface of the second elastic arm 139 facing the metal buckle sleeve 140 may be specifically 95 degrees, 100 degrees, 105 degrees, 112 degrees, 130 degrees, 145 degrees, 156 degrees, 165 degrees, and the like. When the included angle between the wall surface of the first elastic arm 138 facing the metal buckle sleeve 140 and the wall surface of the second elastic arm 139 facing the metal buckle sleeve 140 is smaller than 90 degrees, the protruding portion formed by the first elastic arm 138 and the second elastic arm 139 is too sharp, which is inconvenient for plugging and unplugging the connecting shaft 110. When the included angle between the wall surface of the first elastic arm 138 facing the metal buckle sleeve 140 and the wall surface of the second elastic arm 139 facing the metal buckle sleeve 140 is larger than 165 degrees, the clamping projection formed by the first elastic arm 138 and the second elastic arm 139 is too gentle, and the clamping force between the connecting shaft 110 and the clamping part 137 is too small, so that the connection between the connecting shaft 110 and the brush head 120 is unstable, and the connecting shaft 110 is easily separated from the elastic buckle 131. An included angle between the wall surface of the first elastic arm 138 facing the metal buckle sleeve 140 and the wall surface of the second elastic arm 139 facing the metal buckle sleeve 140 is larger than 90 degrees and smaller than 165 degrees, so that the connection shaft 110 and the elastic buckle 131 can be inserted and pulled more smoothly and quickly while the stable connection between the connection shaft 110 and the elastic buckle 131 is ensured.

Further, the first elastic arm 138 is disposed adjacent to the head 122, and the second elastic arm 139 is disposed away from the head 122, and the length of the first elastic arm 138 is smaller than that of the second elastic arm 139 in the axial direction of the connecting shaft 110. By arranging the first elastic arm 138 adjacent to the head 122 and the second elastic arm 139 away from the head 122, the length of the first elastic arm 138 is smaller than that of the second elastic arm 139 in the axial direction of the connecting shaft 110, so that the inclination angle of the first elastic arm 138 is made larger than that of the second elastic arm 139, that is, the second elastic arm 139 is more gentle than the first elastic arm 138. Therefore, the force required by inserting the connecting shaft 110 into the brush head 120 is less than the force required by pulling out the brush head 120, so that the user can install the brush head 120 more smoothly and quickly, and the connecting shaft 110 is less prone to being separated from the brush head 120.

In one embodiment, as shown in fig. 8, the first elastic arm 138 and the second elastic arm 139 are spaced apart from the engaging window 133 at two circumferential edges of the main body 132. Thus, the interference between the two circumferential edges of the fastening portion 137 and the fastening window 133 in the circumferential direction of the main body 132 can be effectively avoided, thereby further improving the reliability of the product.

In an embodiment, as shown in fig. 3 to 6, the connecting shaft 110 includes a shaft main body 112 and an insertion boss 114, the shaft main body 112 is provided with a corresponding clamping groove 111 corresponding to the fastening portion 137, and the insertion boss 114 is connected to an end surface of the shaft main body 112 adjacent to the head portion 122; a clamping cavity 125 and an inserting cavity 126 which are communicated with each other are formed in the brush head main body 121, the inserting hole 124 is communicated with the inserting cavity 126, the inserting cavity 126 and the inserting hole 124 are respectively arranged on two sides of the clamping cavity 125 in the axial direction, the metal clamping sleeve 140 is installed in the clamping cavity 125 in a matched mode, and the inserting boss 114 is limited in the circumferential direction of the connecting shaft 110 and is inserted in the inserting cavity 126 in an inserting mode.

In the present embodiment, the height of the insertion boss 114 can be selected and designed according to the implementation requirements. Alternatively, the cross-sectional shape of the insertion boss 114 is semicircular. Through making grafting boss 114 limit grafting in grafting chamber 126 on the circumference of connecting axle 110, then grafting boss 114 and the installation in grafting chamber 126 can effectively restrict the rotation of connecting axle 110 relative brush head main part 121, so, be favorable to realizing the counterpoint of connecting axle 110 and buckle subassembly 130 more and firm installation. And through making the grafting boss 114 of connecting axle 110 peg graft each other with brush head main part 121 to the rotation of limiting connecting axle 110 relative brush head main part 121, and make connecting axle 110 and buckle subassembly 130 joint each other, in order to restrict the reciprocating and lateral shifting of connecting axle 110 relative brush head main part 121, make the connection between connecting axle 110 and the brush head main part 121 more firm reliable, effectively avoid connecting axle 110 to shake relative brush head main part 121.

Further, referring to fig. 5, fig. 6 and fig. 8, the main body 132 includes a cylinder 134 and a cylinder bottom 135 covering one end of the cylinder 134 adjacent to the head 122, an opening is formed at one end of the cylinder 134 away from the head 122, the cylinder 134 is sleeved on the periphery of the shaft main body 112, and the cylinder bottom 135 is provided with a through hole 136 adapted to the insertion boss 114. Thus, the bottom 135 can abut against the upper wall of the clamping cavity 125, so that the toothbrush body is better injected and molded on the periphery of the whole clamping assembly 130. And the insertion boss 114 is matched with the via hole 136 on the cylinder bottom 135, the insertion boss 114 can also limit the rotation of the cylinder body 134 relative to the insertion boss 114, so as to limit the circumferential rotation of the elastic buckle 131 relative to the connecting shaft 110, so that the installation of the elastic buckle 131 and the connecting shaft 110 is more stable.

In one embodiment, as shown in fig. 3, 5 and 6, the end surface of the shaft body 112 adjacent to the brush head 120 forms a guiding inclined surface 113, the guiding inclined surface 113 is disposed outward from the axis of the connecting shaft 110 and inclined away from the head 122, and the catching groove 111 is disposed adjacent to the guiding inclined surface 113. Thus, the guiding inclined surface 113 can guide the connecting shaft 110 extending into the body portion 132 to push against the first elastic arm 138 and the second elastic arm 139, so that the installation between the connecting shaft 110 and the fastening portion 137 is smoother and more convenient.

In one embodiment, as shown in fig. 4, the ratio of the maximum width W1 of the cross-section of the shaft 123 to the maximum width W2 of the cross-section of the head 122 is greater than or equal to 0.4 and less than or equal to 0.6. That is, W1/W2 is 0.4 or more and 0.6 or less. Specifically, the ratio of W1/W2 may be 0.4, 0.45, 0.5, 0.55, 0.6, etc.

When W1/W2 is less than 0.4, under the head 122 with the same width, the cross-sectional size of the rod 123 is too small, which increases the molding difficulty on the one hand, and on the other hand, the fastener assembly 130 is too small, which has small structural strength and small connection strength with the connecting shaft 110, so that the connection between the connecting shaft 110 and the brush head body 121 is unstable and is easy to loosen. When W1/W2 is greater than 0.6, under the head 122 with the same width, the cross-sectional size of the rod part 123 is larger, and when the rod part 123 extends into the oral cavity, the gum or other parts in the teeth are affected, thereby affecting the user experience. And by making W1/W2 be more than or equal to 0.4, and be less than or equal to 0.6, satisfying the structural strength of pole portion 123 and buckle subassembly 130 and the joint strength of buckle subassembly 130 and connecting axle 110 for be connected between connecting axle 110 and the brush head main part 121 is firm, when being difficult to the pine and take off, make the size design of pole portion 123 as little as possible, then the influence that causes the oral cavity is littleer, can effectively promote user's use experience.

The utility model discloses still provide an electric toothbrush, as figure 9 and figure 10, this electric toothbrush includes handle 200, motor 300 and electric toothbrush's brush head subassembly 100, this electric toothbrush's brush head subassembly 100's concrete structure refers to above-mentioned embodiment, motor 300 fixed mounting is in handle 200, the one end fixed connection of brush head 120 is kept away from with electric toothbrush's brush head subassembly 100's connecting axle 110 to the drive end of motor 300, the one end that connecting axle 110 is close to brush head 120 stretches out the handle 200 setting. Since the electric toothbrush adopts all the technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here. The structures of the handle 200 and the motor 300 can refer to the existing structures, and are not described in detail herein. The connection shaft 110 of the brush head 120 assembly may be a driving shaft of the motor 300, or may be a shaft connected to the driving shaft of the motor 300.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A brush head component of an electric toothbrush comprises a connecting shaft, a brush head and a buckle component, wherein the brush head is detachably connected with one end of the connecting shaft,

2. The brushhead assembly of an electric toothbrush according to claim 1, wherein the body portion is arranged in a cylindrical shape so as to be sleeved on the periphery of the connecting shaft, a snap window is formed in the body portion, the snap portion includes a first resilient arm and a second resilient arm which are connected in an axial direction of the connecting shaft, ends of the first resilient arm and the second resilient arm which are away from each other are connected to an edge of the snap window, and the first resilient arm and the second resilient arm are arranged at an included angle away from the metal snap sleeve; the connecting shaft is provided with a clamping groove matched with the clamping part corresponding to the clamping part.

3. The brushhead assembly of claim 2, wherein the snap-in groove is provided around the peripheral wall of the connecting shaft; the inner wall surface of the metal buckle sleeve is provided with a capacity expansion groove corresponding to the first elastic arm and the second elastic arm.

4. The brush head assembly of an electric toothbrush according to claim 3, wherein the receiving groove surrounds an inner peripheral wall of the metal snap sleeve, and upper and lower wall surfaces of the receiving groove in an axial direction of the connecting shaft are obliquely arranged.

5. The brushhead assembly of the power toothbrush of claim 2, wherein the angle between the wall of the first resilient arm facing the metal snap pocket and the wall of the second resilient arm facing the metal snap pocket is greater than 90 degrees and less than 165 degrees; and/or the first elastic arm is arranged close to the head, the second elastic arm is arranged far away from the head, and the length of the first elastic arm is smaller than that of the second elastic arm in the axial direction of the connecting shaft.

6. The brushhead assembly of claim 2, wherein the first resilient arm and the second resilient arm are spaced from the snap window about both circumferential edges of the body portion.

7. The brush head assembly of an electric toothbrush according to any one of claims 1 to 6, wherein the connecting shaft comprises a shaft main body and a plug boss, the shaft main body is provided with a snap groove corresponding to the snap portion, the snap groove is matched with the snap groove, and the plug boss is connected to the end face of the shaft main body adjacent to the head; the toothbrush head comprises a toothbrush head body and is characterized in that a clamping cavity and an inserting cavity which are communicated with each other are formed in the toothbrush head body, an inserting hole is communicated with the inserting cavity, the inserting cavity and the inserting hole are respectively arranged on two sides of the clamping cavity in the axial direction, the metal clamping buckle sleeve is installed in the clamping cavity in an adaptive mode, and the inserting boss is limited in the circumferential direction of the connecting shaft and is inserted in the inserting cavity.

8. The brushhead assembly of claim 7, wherein the body portion includes a barrel and a barrel base covering an end of the barrel adjacent to the head portion, an opening is provided at an end of the barrel remote from the head portion, the barrel is sleeved on the periphery of the shaft body, and the barrel base is provided with a through hole adapted to the engagement projection.

9. The brushhead assembly of an electric toothbrush of any one of claims 1 to 6, wherein the ratio of W1 to W2 is greater than or equal to 0.4 and less than or equal to 0.6.

10. An electric toothbrush, characterized in that, the electric toothbrush includes a handle, a motor and a brush head assembly of the electric toothbrush according to any one of claims 1 to 9, the motor is fixedly installed in the handle, a driving end of the motor is fixedly connected with one end of a connecting shaft of the brush head assembly of the electric toothbrush, which is far away from the brush head, and one end of the connecting shaft, which is close to the brush head, extends out of the handle.