Rotating replacement brush head for an electric toothbrush

Abstract

The present invention discloses a rotary replacement brush head device for an electric toothbrush, comprising a replacement brush head body (100), wherein the replacement brush head body (100) comprises a brush handle (10) and a brush head (20), the brush handle (10) comprises a cavity, the brush head (20) is arranged at the upper part of the cavity, the cavity (101) comprises an elastic connecting rod (11), a spring limiting disc (111) is provided at the lower part of the elastic connecting rod (11), a first pin hole (1171) is provided at the upper part of the elastic connecting rod (11), . The present invention provides a rotary replacement brush head device for an electric toothbrush with a simple structure, flexible assembly / disassembly, convenient use, better cleaning effect and multiple functions. (Figure for abstract: Fig.1)

Description

Title of the invention: Rotating replacement brush head device for an electric toothbrush Technical field of the invention

[0001] The present invention relates to the field of electric toothbrush technology, in particular to a rotating replacement brush head device for an electric toothbrush. Prior art

[0002] Electric toothbrushes are usually equipped with removable and replaceable brush heads, also called "replacement heads", so that a common handle can be used by several members of the family, and each has their own individual replacement brush head. And when the brush head is worn out and / or needs to be replaced, in other words, it is enough to replace the brush head, instead of the entire electric toothbrush, including the handle.

[0003] When brushing, various forces must be transmitted by coupling between the replacement brush head and the handle during the brushing operation. These forces specifically include a cleaning force, a driving force, an axial force and a radial force acting on the replacement brush head and / or the handle. The coupling between the replacement brush head and the handle is often achieved by having the radial force absorbed or dissipated in the handle and the axial force absorbed or dissipated in the drive shaft. This is achieved by pushing a tubular connecting element of the replacement brush head towards a coupling rod or the neck of the toothbrush, and coupling the drive shaft disposed in the brush tube of the replacement brush head to a drive shaft projecting from the end of a coupling rod of the handle.

[0004] The electric toothbrush provides high efficiency, portability and good cleaning effect and is therefore widely used, the existing electric toothbrush mainly works on the basis of the rapid rotation of the motor and therefore drives the brush head to vibrate, thus ensuring a good cleaning effect. The existing electric toothbrush has a complex internal structure, too many assembly parts cause corresponding costs in production and a high damage rate of the entire toothbrush; in addition, the high-speed rotation of the motor drives the brush head to vibrate through a transmission component, and instability of the internal structure is likely to cause structural damage, which affects the normal use of the electric toothbrush, thus causing poor cleaning of the teeth.

[0005] At present, for electric toothbrushes on the market, the brush head device is difficult to disassemble and replace flexibly, and it is inflexible and inconvenient to replace the brush head part. Therefore, consumers need an electric toothbrush that is more convenient to use, more flexible to assemble and disassemble, and provides a better tooth cleaning effect. Disclosure of the invention

[0006] The main object of the present invention is to provide a rotating replacement brush head device for an electric toothbrush with a simple structure, flexible assembly / disassembly, convenient use, better cleaning effect and multiple functions.

[0007] For the above purpose, the present invention provides a rotary replacement brush head device for an electric toothbrush, comprising a replacement brush head body, wherein the replacement brush head body comprises a brush handle and a brush head, the brush handle comprises a cavity, the brush head is arranged at the upper part of the cavity, the cavity comprises an elastic connecting rod, a spring limiting disc is provided at the lower part of the elastic connecting rod, a first pin hole is provided at the upper part of the elastic connecting rod, a pin is provided in the first pin hole, the diameter of the first pin hole is greater than the diameter of the pin; the elastic connecting rod comprises a compression spring, the elastic connecting rod is arranged in the compression spring, and the compression spring is arranged on the spring limiting plate;

[0008] The brush comprises a boss, the boss comprises a second pin hole, and the elastic connecting rod is connected to the brush by inserting the pin into the second pin hole.

[0009] Optionally, a first spring travel limiting block and a second spring travel limiting block are provided respectively on either side of the elastic connecting rod.

[0010] Optionally, the elastic connecting rod comprises a mounting groove, and the mounting groove is disposed above the first spring stroke limiting block and the second spring stroke limiting block.

[0011] Optionally, the portion of the elastic connecting rod between the mounting groove and the pin is curved.

[0012] Optionally, the spring limiting disc comprises an escape groove, and the lower end of the spring limiting disc is provided with a crossbone.

[0013] Optionally, the elastic connecting rod comprises a spring support, the elastic connecting rod is arranged in the spring support via the compression spring.

[0014] Optionally, the upper portion of the spring support includes a limiting groove.

[0015] Optionally, the spring support comprises on its side wall a tightening clasp.

[0016] Optionally, the brush comprises a positioning bearing, and the bump is connected to the brush via the positioning bearing.

[0017] Optionally, the boss comprises an inner cylinder, and the inner cylinder is provided with a rotating shaft.

[0018] Optionally, the inner cylinder includes a rotary shaft hole, and the rotary shaft fits without clearance to the rotary shaft hole and is connected to the inner cylinder.

[0019] Optionally, the hump comprises a first connecting bone and a second connecting bone, and the hump is connected to the internal cylinder via the first connecting bone and the second connecting bone.

[0020] Optionally, the first connecting bone and the second connecting bone are provided with a first spacer cavity and a second spacer cavity respectively.

[0021] Optionally, the cavity comprises at its upper part a rotating limiting column.

[0022] Optionally, a hole for the passage of the rotating shaft is provided on one side of the rotating limiting column.

[0023] Optionally, the brush head includes an upper brush blade cover and a lower brush blade cover; the upper brush blade cover includes bristle pores and the lower brush blade cover includes an overflow groove.

[0024] Optionally, the cavity comprises at its lower portion an opening, the opening comprises at its lower portion a first elastic blade and a second elastic blade; a first mounting clamping groove is formed between the first elastic blade and the second elastic blade; and a spacing groove is formed between the second elastic blade and the side wall of the opening.

[0025] Optionally, the first elastic blade and the second elastic blade respectively comprise a first positioning groove or a second positioning groove.

[0026] Optionally, the first elastic blade and the second elastic blade each comprise a reinforcing block.

[0027] The present invention has the following technical beneficial effects:

[0028] (1) According to the present invention, a compression spring provides a driving force for reciprocating motion, thereby driving the elastic connecting rod to perform movement and has structural simplicity and reliability of movement by compared to the structure adopted in the existing art which provides motive force by means of mutual attraction between an iron piece and a magnet of the main motor shaft;

[0029] (2) A clearance-free fit between the rotating shaft and the brush allows for a connection firmly, the rotating shaft fits precisely with the rotating shaft through hole of the brush handle, effectively improving the stability of the rotating movement and reducing the working noise;

[0030] (3) An integrated elastic structure of the brush handle makes it possible to simplify the product structure and reduce product cost;

[0031] (4) The compression spring fits precisely to the limiting disc of spring to improve the stability of the reciprocating movement of the spring;

[0032] (5) A copper-free hair implantation process reduces pollution of rust of copper blade due to planting bristles with copper, which is more conducive to human health. Brief description of the figures

[0033] The embodiments of the present invention or the existing technical solutions appear more clearly during the detailed description of the figures used in the embodiments and the existing technical solutions. Avoidance, the figures below are given only for illustrative and non-limiting purposes, and other figures can be obtained according to the structures shown in the figures by those skilled in the art without creative work.

[0034] [Fig. 1] is a diagram of the structure according to one embodiment of the rotating replacement brush device for an electric toothbrush of the present invention;

[0035] [Fig.2] is another diagram of the structure according to an embodiment of the device of a rotating replacement brush head for an electric toothbrush of the present invention;

[0036] [Fig.3] is a diagram of the structure of the brush handle according to a method of rea lization of the rotating replacement brush head device for an electric toothbrush of the present invention;

[0037] [Fig.4] is a diagram of the structure of the elastic connecting rod according to a method of rea lization of the rotating replacement brush head device for an electric toothbrush of the present invention;

[0038] [Fig.5] is a diagram of the structure of the spring support according to a method of rea lization of the rotating replacement brush head device for an electric toothbrush of the present invention;

[0039] [Fig.6] is a diagram of the structure of the brush according to one embodiment of the rotating replacement brush head device for an electric toothbrush of the present invention;

[0040] [Fig.7] is a diagram of the structure of the brush blade upper cover of the brush head according to one embodiment of the rotating replacement brush head device for an electric toothbrush of the present invention;

[0041] [Fig.8] is a diagram of the structure of the brush blade bottom cover of the brush head according to one embodiment of the rotating replacement brush head device for an electric toothbrush of the present invention;

[0042] [Fig.9] is a diagram of the structure of the main motor of the electric toothbrush according to one embodiment of the rotating replacement brush head device for an electric toothbrush of the present invention.

[0043] In the figures, the references are as follows:

[0044] 100 - Replacement brush body; 10 - Brush handle; 101 - Cavity; 11 - Elastic connecting rod; 111 - Spring limiting disc; 112 - Crossbone; 113 - Exhaust groove; 114 - Arc contact; 1151 - First spring stroke limiting block; 1152 - Second spring stroke limiting block; 116 - Mounting groove; 117 - Pin; 1171 - First pin hole; 12 - Compression spring; 121 - Spring mounting hole; 122 - Spring holder; 123 - Upper end of spring holder; 124 - Holder boss; 1241 - Elastic connecting rod through hole; 1242 - Limiting groove; 1221 - Clamp clasp; 13 - Cylinder; 131 - Rotary shaft through hole; 14 - Rotary limiting column; 15 - Clamp clasp hole; 161 - First elastic blade; 162 - Second elastic blade; 1611 - First positioning groove; 1612 - Second positioning groove; 163 - First mounting clamping groove; 164 - Spacer groove; 165 - Side wall;1661 - First reinforcement block; 1662 - Second reinforcement block; 20 - Brush; 201 - Second pin hole; 202 - First connecting bone; 203 - First spacer cavity; 204 - Inner cylinder; 205 - Second connecting bone; 206 - Brush; 207 - Positioning bearing; 208 - Second spacer cavity; 209 - Rotary shaft hole; 21 - Brush blade upper cover; 211 - Upper cover connecting face; 212 - Hot melt adhesive nail; 213 - Bristle pore; 214 - Bristle; 22 - Brush blade lower cover; 221 - Lower cover connecting face; 222 - Ultrasonic wire; 223 - Overflow groove; 30 - Main motor; 31 - Main motor shaft; 32 - Main motor clamp clasp. ;

[0045] The implementation, functional properties and advantages of the present invention will be described in more detail below with reference to the embodiments and the figures. Description of the embodiments

[0046] The technical solutions of the embodiments of the present invention will be described clearly and completely by the following description with reference to the figures, in which said embodiments are only part of the embodiments instead of all embodiments. Other embodiments based on the embodiments of the present invention and obtained by those skilled in the art without creative work should be included within the scope of protection of the present invention.

[0047] It is noted that, in the embodiments of the present invention, the direction indicating terms such as "upper", "lower", "left", "right", "front" and "rear" are only for explaining a relative positional relationship between the components under a particular attitude (as shown in the figures), movements or the like, if the specific attitude changes, the direction indicating terms also change accordingly.

[0048] In the present invention, unless otherwise clearly indicated or specified, the terms "connection", "fixing" or the like shall be understood in their broad senses, for example, it may be a fixed connection or a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be a direct connection or an indirect connection via an intermediate means, and it may be an internal communication between two components and an interaction relationship of two components, unless otherwise clearly specified. For those skilled in the art, the above terms may be understood according to the specific situations in the embodiments of the present invention.

[0049] Furthermore, when embodiments of the present invention relate to terms such as "first" and "second", the terms "first" and "second" are illustrative, and cannot be considered to indicate or imply a relative degree of importance or number of indicated technical features. Thus, features with the words "first" or "second" can be considered to indicate or imply one or more features. Furthermore, the meaning of "and / or" appearing in the description includes three parallel solutions, taking "A and / or B" as an example, including a solution A, or a solution B, or both solutions A and B at the same time.Furthermore, the technical solutions of the different embodiments can be combined with each other, but must be based on the possibility of realization by a person skilled in the art, when the combination of technical solutions seems contradictory or impossible to realize, it should be considered that the com . combination of such technical solutions does not exist, nor is it included within the scope of the protection claimed by the present invention.

[0050] The present invention provides a rotating replacement brush head device for an electric toothbrush. Embodiment 1

[0051] Referring to Figures 1, 2, 3, 4, 5, 6 and 9, in one embodiment of the present invention, the rotating replacement brush head device for an electric toothbrush comprises a replacement brush head body 100, which comprises a brush handle 10 and a brush head 20, the brush handle 10 comprises a cavity 101, preferably, two ends of the cavity 101 are open;

[0052] - the brush 20 is arranged at the upper part of the cavity 101, the cavity 101 comprises an elastic connecting rod 11, a spring limiting disc 111 is provided at the lower part of the elastic connecting rod 11, a first pin hole 1171 is provided at the upper part of the elastic connecting rod 11, a pin 117 is provided in the first pin hole 1171, the diameter of the first pin hole 1171 is larger than the diameter of the pin 117, that is, the first pin hole 1171 fits loosely with the pin 117; the first pin hole 1171 is connected to one end of the pin 117;

[0053] - the elastic connecting rod 11 comprises a compression spring 12, the elastic connecting rod 11 is disposed inside the compression spring 12 and the compression spring 12 is disposed on the spring limiting disc 111;

[0054] - the brush comprises a bump 206, preferably, a bump 206 is cy-shaped lindrique; the boss 206 comprises a second pin hole 201, the diameter of the second pin hole 201 is substantially equal to that of the pin 117, the second pin hole 201 is connected to the other end of the pin 117 and the second pin hole 201 fits closely to the other end of the pin 117; the elastic connecting rod 11 is connected to the brush 20 by inserting the pin 117 into the second pin hole 201.

[0055] In the present embodiment, the brush handle 10 has a tubular structure with a cavity 101 inside, preferably, both ends of the cavity 101 are open, the inside is used to mount the elastic connecting rod 11, the elastic connecting rod 11 extends by its upper part to the rear of the brush 20, the upper end of the elastic connecting rod 11 comprises a first pin hole 1171; preferably, one end of the pin 117 is connected to the first pin hole 1171, and the other end of the pin 117 is connected to the brush 20 via the second pin hole 201; preferably, the second pin hole 201 is concentric with the round hole of the first pin hole 1171, and the elastic connecting rod 11 is connected to the brush 20 via the pin 17.

[0056] In the present embodiment, the diameter of the first pin hole 1171 is larger than the diameter of the pin 117, i.e., the diameter of the pin 117 is slightly smaller than the diameter of the first pin hole 1171; a small gap is left between the first pin hole 1171 and the pin 117, so that the two can rotate relative to each other, the brush 20 is connected to the elastic connecting rod 11 via the pin 117 to assemble a transmission mechanism for converting linear motion into rotational motion.

[0057] In the present embodiment, the elastic connecting rod 11 comprises at its lower part a spring limiting disc 111, the elastic connecting rod 11 is sheathed in the compression spring 12, and the compression spring 12 is disposed on the spring limiting disc 111; the front wall of the cavity 101 serves as a limit face of the spring holder 122, and the spring limiting disc 111 prevents the compression spring 12 from disengaging and serves as a driving face when the spring returns.

[0058] The cavity 101 comprises a spring mounting hole 121, a circumferential face of the spring limiting disc 1111 and the spring mounting hole 121 guide each other, thereby improving the stability of the reciprocating movement of the elastic connecting rod 11 and reducing noise.

[0059] Referring to Figures 1 and 4, in the present embodiment, preferably, a first spring stroke limiting block 1151 and a second spring stroke limiting block 1152 are provided respectively on either side of the elastic connecting rod 11.

[0060] The first spring stroke limiting block 1151 and the second spring stroke limiting block 1152 serve to prevent the compression spring 12 from disengaging and to improve the stability of the reciprocating movement of the compression spring 12.

[0061] In the present embodiment, preferably, the elastic connecting rod 11 comprises a mounting groove 116, and the mounting groove 116 is disposed above the first spring stroke limiting block 1151 and the second spring stroke limiting block 1152.

[0062] In the present embodiment, when the upper end of the cavity 101 of the brush handle 10 is provided with a brush 20, an elastic connecting rod 11 and a pin 117, and the mounting groove 116 enables precise positioning and assembly.

[0063] Referring to Figures 4 and 9, in the present embodiment, preferably, the portion of the elastic connecting rod 11 between the mounting groove 116 and the pin 117 is curved. That is, the portion of the elastic connecting rod 11 between the mounting groove 116 and the pin 117 has a curved shape, such a shape allows the connecting rod elastic 11 to be easily connected to the brush 20 via the pin 117, the brush 20 can be more easily assembled into a transmission mechanism for converting linear motion into rotational motion, thereby providing a better rotation effect.

[0064] Referring to [Fig.4], in the present embodiment, preferably, the spring limiting disc 111 comprises an escape groove 113, and the lower end of the spring limiting disc 111 is provided with a crossbone 112.

[0065] In the present embodiment, the elastic connecting rod 11 comprises at its lower part a crossbone 112, the end face of the crossbone 112 is an arc contact 114, the arc contact 114 can improve the balance and reliability of the elastic connecting rod 4 when it is in contact with the main motor shaft 31 of the main motor 30 of the electric toothbrush. In operation, the main motor shaft 31 moves alternatively up or down, and the elastic connecting rod 11 moves upward when pushed, and when the main motor shaft 31 moves backward, the elastic connecting rod 11 moves downward with the main motor shaft 31 under the action of the compression spring 12, so that the elastic connecting rod 11 always moves alternatively with the main motor shaft 31.

[0066] Referring to Figures 1, 3, 4 and 5, in the present embodiment, preferably, the elastic connecting rod 11 comprises a spring support 122, and the elastic connecting rod 11 is disposed in the spring support 122 via the compression spring 12.

[0067] The spring holder 122 is mounted in the middle of the cavity 101 of the brush handle 10, preferably, the spring holder 122 includes on its side wall a projecting clamp clasp 1221, the clamp clasp 1221 fits a clamp clasp hole 15 in the middle of the cavity 101 of the brush handle 10 to prevent the spring holder 122 from disengaging from the brush handle 10.

[0068] The spring mounting hole 121 may be provided in the spring holder 122, the spring mounting hole 121 is a circular through hole and provided in the middle of the inside of the spring holder 122; more preferably, the upper part of the spring holder 122 has a projection 124, a spring rod through hole 1241 is provided in the middle of the projection 124, the spring rod through hole 1241 may be provided with a limiting groove 1242; and the spring rod 11 passes through the spring holder 122 through the spring rod through hole 1241.

[0069] The space between the elastic connecting rod 11 and the spring holder 122 is a mounting position of the compression spring 12. The compression spring 12 is sheathed on the elastic connecting rod 11 and mounted in the spring holder 122. The first spring stroke limiting block 1151 and the second spring stroke limiting block spring 1152 on the elastic connecting rod 11 are mounted in the limiting groove 1242 of the spring holder 122, and the compression spring 12 applies a force to the first spring stroke limiting block 1151 and the second spring stroke limiting block 1152, in order to prevent deformation of the elastic connecting rod 11 under the tension of the compression spring 12.

[0070] In the present embodiment, the elastic connecting rod 11 is provided with an exhaust groove 113 for escaping the gas contained in the spring support 122 when the replacement brush 100 is operating, thus avoiding loss of power.

[0071] Referring to Figures 1, 2, 3, 4, 5 and 6, in the present embodiment, preferably, the brush 20 comprises a positioning bearing 207, and the bump 206 is connected to the brush 20 via the positioning bearing 207.

[0072] In the present embodiment, further and preferably, the boss 206 comprises an inner cylinder 204, and the inner cylinder 204 is provided with a rotating shaft 23.

[0073] In the present embodiment, more preferably, the inner cylinder 204 includes a rotary shaft hole 209, and the rotary shaft 23 fits without play to the rotary shaft hole 209 and is connected to the inner cylinder 204.

[0074] In the present embodiment, preferably, the boss 206 comprises a first connecting bone 202 and a second connecting bone 205, the boss is connected to the internal cylinder via the first connecting bone and the second connecting bone.

[0075] In the present embodiment, further and preferably, the first connecting bone 202 and the second connecting bone 205 are provided with a first spacer cavity 203 and a second spacer cavity 208 respectively.

[0076] Referring to [Fig.2], in the present embodiment, preferably, the upper end of the cavity 101 comprises a rotatable limiting column 14.

[0077] In the present embodiment, preferably, the rotary limiting column 14 is provided with a rotary shaft passage hole 131, preferably, the rotary limiting column 14 is provided with a cylinder 13, and the rotary shaft passage hole 131 is disposed on the cylinder 13.

[0078] The brush 20 is provided at the back with a positioning bearing 207 for automatic assembly, the positioning bearing 207 can help to realize automatic assembly of the entire replacement brush body 100 and can also increase the strength of the brush 20.

[0079] The brush is provided at the back with a bump 206, preferably, the bump 206 has a cylindrical shape, the bump 206 is an external cylinder; an internal cylinder 204 is arranged inside the bump 206, the bump 206 and the internal cylinder 204 are connected to each other by means of the first connecting bone 202 and the second connecting bone 205, first spacer cavity 203 and second spacer cavity 208 are arranged in the middle, and the first spacer cavity 203 and second spacer cavity 208 can reduce processing difficulty and increase structural strength.

[0080] The first connecting bone 202 comprises a second pin hole 201, and the second pin hole 201 is used for mounting the pin 117. The second pin hole 201 closely fits the other end of the pin 117, and the brush 20 is coupled to the elastic connecting rod 11 via the pin 117.

[0081] The inner cylinder 204 is the rotation center of the brush 20, the inner cylinder 204 comprises a rotary shaft hole 209, the rotary shaft hole 209 is connected to the shaft 23 via the shaft hole 131, a small space is reserved between the upper face of the cylinder 13 and the upper face of the inner cylinder 204 of the brush 20, a small space is reserved between the rotary shaft 23 and one side of the rotary shaft through hole 131, so that the brush 20 can perform a direct or reverse rotational movement with respect to the rotary shaft 131 as the center.

[0082] In the present embodiment, preferably, the rotating shaft 23 is made of stainless steel. The rotating shaft 23 fits without play to one side of the rotating shaft hole 209, a front section of the stainless steel rotating shaft 23 is designed as a multi-layered inverse structure, so that the brush handle 10 and the brush head 20 can connect firmly, thereby avoiding a thrust and friction force between the brush head 20 and the brush handle 10, which will cause disengagement.

[0083] In the present embodiment, the cavity 101 of the brush handle 10 is provided with a rotational limiting column 14, when mounting the brush 20, the rotational limiting column 14 is located in the first spacing cavity 203 of the brush 20. When rotating the brush 20, the rotation angle of the brush 20 is limited by the rotational limiting column 14, the first connecting bone 202 and the second connecting bone 205.

[0084] Referring to Figures 1, 3, 4, 6, 7, 8 and 9, in the present embodiment, preferably, the brush 20 comprises an upper brush blade cover 21 and a lower brush blade cover 22; the upper brush blade cover 21 comprises bristle pores 213 and the lower brush blade cover 22 comprises an overflow groove 223.

[0085] Referring to [Fig.3], in the present embodiment, preferably, the cavity 101 comprises at its lower part an opening 16, the opening 16 comprises a first elastic blade 161 and a second elastic blade 162; a first mounting clamping groove 163 is formed between the first elastic blade 161 and the second elastic blade 162, and a spacing groove 164 is formed between the second elastic blade 162 and the side wall 165 of the opening 16; the groove spacer 164 allows the first elastic blade 161 and the second elastic blade 162 to deform outwardly.

[0086] In the present embodiment, more preferably, the first elastic blade 161 comprises a first positioning groove 1611; or the second elastic blade 162 comprises a second positioning groove 1612, and the position, size and structure of the first positioning groove 1611 correspond to those of the second positioning groove 1612;

[0087] In the present embodiment, more preferably, the first elastic blade 161 comprises a first reinforcing block 1631, and the second elastic blade 162 comprises a second reinforcing block 1632.

[0088] In the present embodiment, the brush 20 is mounted at the opening at the upper end of the brush handle, and different from most current methods on the market in which bristles are implanted using copper blades, the brush 20 of the present invention adopts a bristle implantation method without copper blade, which can avoid rusting of the copper blades which causes pollution, thus reducing bacterial growth with safety and hygiene.

[0089] The brush 20 comprises a brush blade upper cover 21 and a brush blade lower cover 22; the brush blade upper cover 21 is provided with an upper cover connecting face 211, hot melt adhesive nails 212 and bristle pores 213; the front face of the brush blade lower cover 22 is provided with a lower cover connecting face 221, an ultrasonic wire 222 and an overflow groove 223.

[0090] In the present embodiment, the pores 213 are filled with bristles 214, and the bristles 214 and the hot melt adhesive nails 212 are fused together by high temperature hot melt process, i.e., copper-free bristle implantation is performed.

[0091] The connecting face 211 of the upper brush blade cover 21 fits the connecting face 221 of the lower brush blade cover 22, the connecting face 221 of the lower brush blade cover 22 is provided with the ultrasonic wire 222, and the upper brush blade cover 21 is fused with the lower brush blade cover 22 by ultrasonic hot melting process, i.e., assembled into a brush 20.

[0092] In the present embodiment, preferably, the connecting face 221 of the lower brush blade cover is provided on its inner side with an overflow groove 223, which can effectively prevent an excessively wide gap caused by overflow when the upper brush blade cover 21 is fused with the lower brush blade cover 22.

[0093] In the present embodiment, preferably, the positioning bearing 207 and the boss 206 may be disposed behind the lower brush blade cover 22.

[0094] Referring to Figures 3 and 9, in the present embodiment, the tail of the cavity 101 of the brush handle 10 can be mounted and connected to the main motor 30 of the electric toothbrush.

[0095] In the present embodiment, the cavity 101 comprises at its lower part an opening 16, the opening 16 comprises on its two side walls a first elastic blade 161 and a second elastic blade 162; a first mounting clamping groove 163 is formed between the first elastic blade 161 and the second elastic blade 162, and a spacing groove 164 is formed between the second elastic blade 162 and the side wall 165 of the opening 16; the first elastic blade 161 comprises a first positioning groove 1611; the second elastic blade 162 comprises a second positioning groove 1612; the first elastic blade 161 comprises a first reinforcing block 1631, and the second elastic blade 162 comprises a second reinforcing block 1632.

[0096] The opening portions of the first mounting clamping groove 163 and the spacing groove 164 are notched to guide the brush handle 10 and main motor 30 assembly of the electric toothbrush.

[0097] Preferably, the first positioning groove 1611 and the second positioning groove 1612 each have a semicircular shape to fit a clamping clasp of the main motor 32 of the toothbrush, thereby preventing the brush handle 10 from coming loose. In the first mounting clamping groove 163, the first positioning groove 1611 and the second positioning groove 1612 form a first positioning position and a second positioning position whose shapes are semicircular.

[0098] When mounting the replacement brush head 100, the first mounting clamping groove 163 of the brush handle 10 is opened, so that the main motor clamping clasp 32 can enter the first positioning position and the second positioning position respectively through the first mounting clamping groove 163 and the second mounting clamping groove 164, the first positioning position and the second positioning position of which both sides have a semicircular shape act simultaneously to clamp the main motor clamping clasp 32, so that the replacement brush head 100 is reliably assembled with the main motor 30 of the electric toothbrush.

[0099] The present invention consists in carrying out a drive using an external force (the main motor 30 of the electric toothbrush), the return of the com spring pressure 12 is used as a power source to drive, through the elastic connecting rod 11 and the pin 117, the brush 20 to oscillate relative to the stainless steel rotating shaft 23 as the center to achieve the cleaning effect on the teeth by the bristles 214.

[0100] The replacement brush head device for an electric toothbrush of the present invention optimizes the existing design, and has a simpler structure, simpler mounting, better transmission efficiency and better cleaning effect.

[0101] The above embodiments are only possible embodiments of the present invention, but should not be considered as limiting the scope of protection of the present invention, and any equivalent structural modifications according to the description and figures of the present invention or direct or indirect applications in the related technical fields should be included within the scope of protection of the present invention.

Claims

Claims

1. A rotating replacement brush head device for an electric toothbrush, comprising a replacement brush head body (100), the replacement brush head body (100) comprising a brush handle (10) and a brush head (20), characterized in that, the brush handle (10) comprises a cavity, the brush head (20) is arranged at the upper part of the cavity, the cavity (101) comprises an elastic connecting rod (11), a spring limiting disc (111) is provided at the lower part of the elastic connecting rod (11), a first pin hole (1171) is provided at the upper part of the elastic connecting rod (11), a pin (117) is provided in the first pin hole (1171), the diameter of the first pin hole (1171) is greater than the diameter of the pin (117);the elastic connecting rod (11) comprises a compression spring (12), the elastic connecting rod (11) is arranged in the compression spring (12), and the compression spring (12) is arranged on the spring limit plate; the brush (20) comprises a boss (206), the boss (206) comprises a second pin hole (201), and the elastic connecting rod (11) is connected to the brush (20) by inserting the pin (117) into the second pin hole (201).;

2. A rotating replacement brush device for an electric toothbrush according to claim 1, characterized in that a first spring stroke limiting block (1151) and a second spring stroke limiting block (1152) are provided respectively on either side of the elastic connecting rod (11).

3. A rotating replacement brush device for an electric toothbrush according to claim 2, characterized in that the elastic connecting rod (11) comprises a mounting groove (116), and the mounting groove (116) is arranged above the first spring stroke limiting block (1151) and the second spring stroke limiting block (1152).

4. A rotating replacement brush device for an electric toothbrush according to claim 3, characterized in that the portion of the elastic connecting rod (11) between the mounting groove (116) and the pin (117) is curved.

5. A rotating replacement brush device for an electric toothbrush according to claim 1, characterized in that the spring limiting disc (111) comprises an escape groove (113), and the lower end of the spring limiting disc (111) is provided with a crossbone (112).

6. A rotating replacement brush device for an electric toothbrush according to claim 1, characterized in that the elastic connecting rod (11) comprises a spring holder (122), and the elastic connecting rod (11) is arranged in the spring holder (122) via the compression spring (12).

7. A rotating replacement brush device for an electric toothbrush according to claim 6, characterized in that the upper portion of the spring holder (122) comprises a limiting groove (1242).

8. A rotating replacement brush device for an electric toothbrush according to claim 7, characterized in that the spring support (122) comprises on its side wall (165) a tightening clasp (1221).

9. A rotating replacement brush head device for an electric toothbrush according to claim 1, characterized in that the brush head (20) comprises a positioning bearing (207), and the bump (206) is connected to the brush head (20) via the positioning bearing (207).

10. A rotating replacement brush device for an electric toothbrush according to claim 9, characterized in that the boss (206) comprises an inner cylinder (204), and the inner cylinder (204) is provided with a rotating shaft.

11. A rotating replacement brush device for an electric toothbrush according to claim 10, characterized in that the inner cylinder (204) comprises a rotating shaft hole (209), and the rotating shaft fits without play to the rotating shaft hole (209) and is connected to the inner cylinder (204).

12. A rotating replacement brush head device for an electric toothbrush according to claim 11, characterized in that the boss (206) comprises a first connecting bone (202) and a second connecting bone (205), and the boss (206) is connected to the inner cylinder (204) via the first connecting bone (202) and the second connecting bone (205).

13. A rotating replacement brush device for an electric toothbrush according to claim 12, characterized in that the first connecting bone (202) and the second connecting bone (205) are provided of a first spacer cavity (203) and a second spacer cavity (208) respectively.

14. A rotating replacement brush device for an electric toothbrush according to claim 13, characterized in that the cavity (101) comprises at its upper part a rotating limiting column (14).

15. A rotating replacement brush device for an electric toothbrush according to claim 14, characterized in that a rotary shaft passage hole (131) is provided on one side of the rotary limiting column (14).

16. A rotating replacement brush head device for an electric toothbrush according to claim 1, characterized in that the brush head (20) comprises an upper brush blade cover (21) and a lower brush blade cover (22); the upper brush blade cover (21) comprises bristle pores (213) and the lower brush blade cover (22) comprises an overflow groove (223).

17. A rotating replacement brush head device for an electric toothbrush according to claim 1, characterized in that, the cavity (101) comprises at its lower part an opening, the opening comprises at its lower part a first elastic blade (161) and a second elastic blade (162); a first mounting clamping groove (163) is formed between the first elastic blade (161) and the second elastic blade (162); and a spacing groove (164) is formed between the second elastic blade (162) and the side wall (165) of the opening.

18. A rotating replacement brush device for an electric toothbrush according to claim 17, characterized in that the first elastic blade (161) and the second elastic blade (162) respectively comprise a first positioning groove (1611) or a second positioning groove (1612).

19. A rotating replacement brush head device for an electric toothbrush according to claim 18, characterized in that the first elastic blade and the second elastic blade (162) each comprise a reinforcing block.