Electric toothbrush head

Abstract

The application relates to the technical field of toothbrush heads and discloses an electric toothbrush head, which comprises a brush body and an insertion block, a lower part of the brush body is provided with an insertion cavity, the insertion block is inserted into the insertion cavity, and the outer side wall of the insertion block abuts against the inner side wall of the insertion cavity; the insertion block is provided with a machine core channel, a vibrating machine core is inserted into the machine core channel and abuts against the inner side wall of the machine core channel; the brush body is provided with a pin shaft which penetrates into the insertion cavity, is inserted into the upper part of the insertion block and fixedly connects the upper part of the insertion block with the brush body; the bottom of the insertion block is formed with a bottom abutting ring which is located below the brush body and abuts against the bottom of the brush body from bottom to top; the vibrating machine core abuts against the inner side wall of the machine core channel, the high-frequency vibration of the vibrating machine core is transmitted to the brush body through the insertion block, and then the bristles on the brush body are driven to vibrate at high frequency; the upper part of the insertion block is fixedly connected with the brush body through the pin shaft, the bottom of the insertion block abuts against the bottom of the brush body from bottom to top through the bottom abutting ring, the installation connection between the insertion block and the brush body is realized, and the structure is stable.

Description

Technical Field

[0001] This invention patent relates to the technical field of toothbrush heads, and more specifically, to electric toothbrush heads. Background Technology

[0002] With the continuous improvement of living standards, electric toothbrushes have been widely promoted in the market. Electric toothbrushes use a vibrating motor to rapidly rotate or vibrate, causing the brush head to vibrate at high frequency, instantly breaking down toothpaste into fine foam that deeply cleans between teeth. At the same time, the vibration of the bristles promotes blood circulation in the mouth and has a massaging effect on the gum tissue.

[0003] An electric toothbrush includes a handle and an electric toothbrush head. The top of the handle has a vibrating motor, and the electric toothbrush head includes a brush body and an insert. The brush body has bristles, and the insert is inserted into the brush body. The insert has a motor channel, and the vibrating motor is inserted into the motor channel. The vibrating motor abuts against the motor channel. The high-frequency vibration of the vibrating motor drives the bristles on the electric toothbrush head to vibrate, so as to achieve the function of brushing teeth.

[0004] The insert block is inserted into the brush body and needs to be fixedly connected to the brush body to prevent the insert block from detaching from the brush body during use. In the prior art, in order to achieve the assembly between the insert block and the brush body, multiple locking structures are often required between the insert block and the brush body. This not only makes the structure complex, but also results in an unstable connection through the locking structure. Summary of the Invention

[0005] The purpose of this invention is to provide an electric toothbrush head that addresses the problem of complex structure in existing electric toothbrush heads.

[0006] The present invention is implemented as follows: an electric toothbrush head includes a brush body and an insert block. The upper part of the brush body has a bristle portion with bristles, and the lower part of the brush body has an insert cavity. The insert cavity forms an installation opening at the bottom of the brush body. The insert block is inserted into the insert cavity through the installation opening, and the outer side wall of the insert block abuts against the inner side wall of the insert cavity. The insert block has a core channel for inserting a flat vibrating core. The core channel forms an insertion opening at the bottom of the insert block, and the vibrating core is inserted into the core channel through the insertion opening and abuts against the inner side wall of the core channel.

[0007] The brush body is provided with a horizontally arranged pin, which passes through the insertion cavity and is inserted into the upper part of the insertion block. The pin fixes the upper part of the insertion block to the brush body. The bottom periphery of the insertion block extends outward to form a bottom abutment ring. The bottom abutment ring is arranged around the outer periphery of the insertion block and is located below the brush body, abutting against the bottom of the brush body from bottom to top.

[0008] Furthermore, the brush body is provided with a horizontally arranged mounting hole, the mounting hole is connected to the insertion cavity, the pin is inserted into the mounting hole, and the inner end of the pin passes through the mounting hole, extends into the insertion cavity, and is inserted into the upper part of the insertion block;

[0009] A longitudinal step is formed in the middle of the mounting hole, and the outer end of the pin is provided with an end head. The end head is embedded and fixed in the mounting hole and abuts against the longitudinal step. The longitudinal step positions the lateral insertion depth of the pin.

[0010] Furthermore, the insert has a notch in the middle, the notch is connected to the movement channel, and a longitudinally arranged elastic arm is provided in the notch, the elastic arm abutting against the inner wall of the insert cavity; when the vibrating movement is inserted into the movement channel, the vibrating movement abuts against the inner wall of the movement channel, and the elastic arm abuts against the vibrating movement.

[0011] Furthermore, the insert includes a base and an insert shaft disposed on the base; the insert shaft is abutted to the top of the base, and the base and the insert shaft are integrally formed; the movement channel passes through the base and extends to the lower part of the insert shaft; the notch is disposed on the insert shaft, and the bottom abutment ring is disposed on the outer periphery of the bottom of the base;

[0012] The insert shaft and the seat are respectively inserted into the insertion cavity, and the outer side wall of the insert shaft and the outer side wall of the seat abut against the inner side wall of the insertion cavity; the upper part of the insert shaft is solid and forms a fixed section, and the outer side wall of the fixed section abuts against the inner side wall of the insertion cavity; the fixed section is provided with a horizontally arranged pin hole, which is horizontally aligned with the mounting hole, and the pin shaft is inserted and fixed in the pin hole.

[0013] Furthermore, the outer periphery of the fixed section is provided with a longitudinally arranged positioning surface, which is planar; the inner sidewall of the insertion cavity has a longitudinally arranged positioning sidewall, which is planar, and the positioning surface abuts against the positioning sidewall; the pin passes through the positioning sidewall and the positioning surface respectively.

[0014] Furthermore, the lower part of the insertion shaft forms a vibration section, the mechanism channel extends into the vibration section, and the notch is provided in the vibration section; there is a vibration gap between the outer wall of the vibration section and the inner wall of the insertion cavity; the seat has an outwardly arranged outer peripheral sidewall, and along the direction in which the seat is inserted into the insertion cavity, the outer peripheral sidewall is arranged inwardly at an angle, and the outer peripheral sidewall abuts against the inner wall of the insertion cavity.

[0015] Furthermore, the upper end of the elastic arm is connected to the inner wall of the notch groove, and the lower end of the elastic arm extends into the notch groove and is freely arranged; the elastic arm has an inner abutting surface facing the movement channel and an outer abutting surface facing away from the movement channel, the inner abutting surface abuts against the vibrating movement, and the outer abutting surface abuts against the inner wall of the insertion cavity; the vibrating movement is provided with a transversely arranged transverse groove, and a transversely arranged transverse ridge protrudes from the inner abutting surface, the transverse ridge being embedded in the transverse groove.

[0016] Furthermore, the upper part of the outer abutment surface is recessed towards the movement channel to form a recessed portion, and the lower part of the outer abutment surface protrudes outward to form a protruding portion; the thickness of the upper part of the elastic arm is less than the thickness of the lower part of the elastic arm, the protruding portion abuts against the inner wall of the insertion cavity, and there is an elastic gap between the recessed portion and the inner wall of the insertion cavity.

[0017] Furthermore, the elastic arm has a longitudinally arranged interlayer groove in the middle, which penetrates the lower end of the elastic arm; the interlayer groove is filled with an elastic adhesive layer, which fills the entire interlayer groove and is under pressure in the interlayer groove; the adhesive layer passes through the elastic arm and extends to the inner abutment surface, forming an elastic surface protruding outside the inner abutment surface.

[0018] The adhesive layer has multiple hollowed-out positions inside. When the vibrating core is inserted into the core channel, the elastic surface abuts against the vibrating core. The elastic surface is compressed inward by the pressure until it is flush with the inner abutting surface.

[0019] Furthermore, there is an installation gap between the end of the pin and the end of the pin hole, and a plurality of elastic rubber rings are embedded in the outer side wall of the pin. The plurality of rubber rings are arranged at intervals along the axial direction of the pin and are arranged around the pin in the circumferential direction.

[0020] The pin has multiple mounting grooves, which are spaced apart along the axial direction of the pin and arranged around the circumference of the pin. The rubber ring is embedded in the mounting groove, with its bottom abutting against the bottom of the mounting groove and its top extending outside the mounting groove. There are deformation gaps between the two sides of the rubber ring and the inner sidewall of the mounting groove. The middle of the rubber ring has a hollow groove, which is arranged around the circumference of the rubber ring and extends through the top of the rubber ring.

[0021] When the pin is inserted into the brush body and the insert block, the rubber ring is subjected to pressure and elastically compressed and deformed towards the deformation gap and the hollow groove, and the rubber ring is in a compressed state.

[0022] Compared with existing technologies ，The electric toothbrush head provided by this invention has a vibrating motor inserted into a motor channel, abutting against the inner wall of the motor channel. The high-frequency vibration of the vibrating motor can be transmitted to the brush body through the insert block, thereby driving the bristles on the brush body to vibrate at high frequency. The upper part of the insert block is fixedly connected to the brush body by a pin, and the bottom of the insert block abuts against the bottom of the brush body from bottom to top through a bottom abutting ring, realizing the installation connection between the insert block and the brush body. The structure is simple, and the connection between the insert block and the brush body is more stable by using a pin, avoiding the phenomenon of the insert block and the brush body separating due to long-term vibration operation. Attached Figure Description

[0023] Figure 1 This is a three-dimensional schematic diagram of the electric toothbrush head provided by the present invention;

[0024] Figure 2 This is an exploded three-dimensional schematic diagram of the electric toothbrush head provided by the present invention;

[0025] Figure 3 This is a three-dimensional schematic diagram of the insert block provided by the present invention;

[0026] Figure 4 This is a cross-sectional schematic diagram of the electric toothbrush head provided by the present invention;

[0027] Figure 5 yes Figure 4 Enlarged diagram of point A in the diagram;

[0028] Figure 6 This is a schematic diagram of the internal structure of the brush body provided by the present invention;

[0029] Figure 7 This is a cross-sectional schematic diagram of the pin and rubber ring mating provided by the present invention;

[0030] Figure 8 This is a cross-sectional schematic diagram of the pin provided by the present invention;

[0031] Figure 9 yes Figure 7 Enlarged diagram of point B in the image;

[0032] Figure 10 This is an internal schematic diagram of the elastic arm and adhesive layer cooperation provided by the present invention;

[0033] Figure 11 This is a schematic diagram of the internal structure of the elastic wall provided by the present invention;

[0034] Figure 12 This is a front view schematic diagram of the brush handle provided by the present invention. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0036] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0037] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0038] Reference Figure 1-12 The image shown is a preferred embodiment of the present invention.

[0039] The electric toothbrush head provided in this embodiment is used to connect with the vibrating core 801 of the brush handle 800. The vibrating core 801 is inserted into the core channel 34 of the electric toothbrush head and fixed in the core channel 34. The high-frequency vibration of the vibrating core 801 drives the vibration of the entire electric toothbrush head, thereby realizing the high-frequency vibration of the bristles.

[0040] The electric toothbrush head with pin 200 is connected to a brush body 100 and a plug 300. The upper part of the brush body 100 has a bristle part 103 with bristles, and the lower part of the brush body 100 has a cavity 105. The cavity 105 has an installation opening 109 at the bottom of the brush body 100. The plug 300 is inserted into the cavity 105 through the installation opening 109, and the outer side wall of the plug 300 abuts against the inner side wall of the cavity 105. The plug 300 has a core channel 34 for inserting a flat vibrating core 801. The core channel 34 has an insertion opening 39 at the bottom of the plug 300. The vibrating core 801 is inserted into the core channel 34 through the insertion opening 39 and abuts against the inner side wall of the core channel 34.

[0041] The brush body 100 is provided with a horizontally arranged pin 200, which passes through the insertion cavity 105 and is inserted into the upper part of the insertion block 300. The pin 200 fixes the upper part of the insertion block 300 to the brush body 100. The outer periphery of the bottom of the insertion block 300 extends outward to form a bottom abutment ring 33, which is arranged around the outer periphery of the insertion block 300. The bottom abutment ring 33 is located below the brush body 100 and abuts against the bottom of the brush body 100 from bottom to top.

[0042] The electric toothbrush head provided above has a vibrating motor 801 inserted into the motor channel 34 and abutting against the inner wall of the motor channel 34. The high-frequency vibration of the vibrating motor 801 can be transmitted to the brush body 100 through the insert block 300, thereby driving the bristles on the brush body 100 to vibrate at high frequency. The upper part of the insert block 300 is fixedly connected to the brush body 100 through the pin 200, and the bottom of the insert block 300 abuts against the bottom of the brush body 100 from bottom to top through the bottom abutting ring 33, realizing the installation connection between the insert block 300 and the brush body 100. The structure is simple, and the connection between the insert block 300 and the brush body 100 is realized through the pin 200, making the connection more stable and avoiding the phenomenon of the insert block 300 and the brush body 100 separating due to long-term vibration operation.

[0043] In this embodiment, the brush body 100 is provided with a horizontally arranged mounting hole 101, which connects to the insertion cavity 105. The pin 200 is inserted into the mounting hole 101, and the inner end of the pin 200 passes through the mounting hole 101 and extends into the insertion cavity 105, and is inserted into the upper part of the insertion block 300. A longitudinally arranged longitudinal step 102 is formed in the middle of the mounting hole 101. The outer end of the pin 200 is provided with an end head 201, which is embedded and fixed in the mounting hole 101. The end head 201 abuts against the longitudinal step 102, and the longitudinal step 102 positions the lateral insertion depth of the pin 200.

[0044] When inserting and installing the pin 200, the longitudinal step 102 can position the lateral insertion depth of the pin 200, simplifying the installation and ensuring that the pin 200 is inserted in place.

[0045] The end 201 has an outwardly facing outer end face, which is exposed outside the mounting hole 101 and is flush with the outer surface of the brush body 100. In this way, the outer surface of the entire brush body 100 is integrated and will not form an uneven structure due to the outer surface of the end 201.

[0046] The insert block 300 has a notch 314 in the middle, which connects to the movement channel 34. A longitudinally arranged elastic arm 315 is provided in the notch 314, abutting against the inner wall of the insertion cavity 105. When the vibrating movement 801 is inserted into the movement channel 34, the vibrating movement 801 abuts against the inner wall of the movement channel 34, and the elastic arm 315 abuts against the vibrating movement 801. With the vibrating movement 801 inserted in the movement channel 34 and abutting against the elastic arm 315, the high-frequency vibration of the vibrating movement 801 can be transmitted to the brush body 100 through the insert block 300 and the elastic arm 315, thereby driving the bristles on the brush body 100 to vibrate at high frequency.

[0047] In this embodiment, the insert block 300 includes a base 32 and an insert shaft 31 disposed on the base 32; the insert shaft 31 is connected to the top of the base 32, and the base 32 and the insert shaft 31 are integrally formed; the mechanism channel 34 passes through the base 32 and extends to the lower part of the insert shaft 31; the notch 314 is disposed on the insert shaft 31, and the bottom abutment ring 33 is disposed on the outer periphery of the bottom of the base 32.

[0048] The insertion shaft 31 and the seat 32 are respectively inserted into the insertion cavity 105. The outer side wall of the insertion shaft 31 and the outer side wall of the seat 32 abut against the inner side wall of the insertion cavity 105. The upper part of the insertion shaft 31 is solid, forming a fixing section 311. The outer side wall of the fixing section 311 abuts against the inner side wall of the insertion cavity 105. The fixing section 311 is provided with a horizontally arranged pin hole 313. The pin hole 313 is horizontally aligned with the mounting hole 101. The pin shaft 200 is inserted and fixed in the pin hole 313.

[0049] Arranging the pin hole 313 in the solid fixed section 311 facilitates the arrangement of the pin hole 313 and also makes the connection between the pin shaft 200 and the fixed section 311 more stable after the pin hole 313 is inserted.

[0050] The outer periphery of the fixed section 311 is provided with a longitudinally arranged positioning surface 312, which is planar; the inner sidewall of the insertion cavity 105 has a longitudinally arranged positioning sidewall 316, which is planar, and the positioning surface 312 abuts against the positioning sidewall 316; the pin passes through the positioning sidewall 316 and the positioning surface 312 respectively.

[0051] During the process of inserting the insert block 300 into the cavity 105, the insert block 300 can only be correctly assembled in the cavity 105 when the positioning surface 312 and the positioning side wall 316 face each other; otherwise, the insert block 300 cannot be correctly assembled in the cavity 105.

[0052] The lower part of the insert shaft 31 forms a vibrating section 319, and the mechanism channel 34 extends into the vibrating section 319. A notch 314 is provided in the vibrating section 319. There is a vibration gap 106 between the outer wall of the vibrating section 319 and the inner wall of the insert cavity 105. The fixed section 311 is fixedly connected to the brush body 100 by a pin 200. When the vibrating mechanism 801 vibrates in the mechanism channel 34, the vibration is transmitted to the insert shaft 31, and then to the brush body 100, causing the brush body 100 to vibrate. Since there is a vibration gap 106 between the vibrating section 319 and the inner wall of the insert cavity 105, the vibrating section 319 has sufficient elastic deformation space during vibration, which is beneficial to the transmission of vibration.

[0053] In this embodiment, the seat 32 has an outwardly arranged outer peripheral sidewall 321. Along the direction in which the seat 32 is inserted into the insertion cavity 105, the outer peripheral sidewall 321 is arranged inwardly at an angle, and abuts against the inner sidewall of the insertion cavity 105. This facilitates the insertion of the seat 32 into the insertion cavity 105 and facilitates the abutment of the outer peripheral sidewall 321 against the inner sidewall of the insertion cavity 105.

[0054] The upper end of the elastic arm 315 is connected to the inner wall of the notch 314, and the lower end of the elastic arm 315 extends into the notch 314 and is freely arranged. The elastic arm 315 has an inner abutting surface 316 facing the movement channel 34 and an outer abutting surface 3150 facing away from the movement channel 34. The inner abutting surface 316 abuts against the vibrating movement 801, and the outer abutting surface 3150 abuts against the inner wall of the insertion cavity 105. The vibrating movement 801 is provided with a transversely arranged transverse groove 802, and a transversely arranged horizontal rib 602 is protruding on the inner abutting surface 316. The transverse rib 602 is embedded in the transverse groove 802.

[0055] The transverse protrusion 602 is embedded in the transverse groove 802 of the vibratory core 801, making the contact connection between the vibratory core 801 and the inner abutment surface 316 of the elastic arm 315 more stable. The vibration can be better transmitted between the vibratory core 801 and the elastic arm 315, and during the vibration transmission, the disengagement and misalignment between the vibratory core 801 and the inner abutment surface 316 of the elastic arm 315 are avoided.

[0056] In this embodiment, the upper part of the outer abutment surface 3150 is recessed towards the movement channel 34 to form a recessed portion 317, and the lower part of the outer abutment surface 3150 protrudes outward to form a protruding portion 318; the thickness of the upper part of the elastic arm 315 is less than the thickness of the lower part of the elastic arm 315, the protruding portion 318 abuts against the inner wall of the insertion cavity 105, and there is an elastic gap 310 between the recessed portion 317 and the inner wall of the insertion cavity 105.

[0057] When the vibrating mechanism 801 drives the elastic arm 315 to vibrate, the elastic arm 315 vibrates with its upper end as the swing center. There is an elastic gap 310 between the recessed part 317 and the inner wall of the insertion cavity 105, which facilitates the elastic deformation of the upper part of the elastic arm 315.

[0058] In this embodiment, the elastic arm 315 has a longitudinally arranged interlayer groove 399 in the middle, which extends through the lower end of the elastic arm 315. The interlayer groove 399 is filled with an elastic adhesive layer 600, which fills the entire interlayer groove 399 and is under pressure. By setting the adhesive layer 600, the entire elastic arm 315 can have a better elastic effect, and the adhesive layer 600 is under pressure in the interlayer groove 399, which can better transmit the vibration of the vibrating mechanism 801.

[0059] The adhesive layer 600 passes through the elastic arm 315 and extends to the inner abutment surface 316, forming an elastic surface 601 protruding from the inner abutment surface 316. The adhesive layer 600 has multiple hollowed-out positions 603 inside. When the vibrating mechanism 801 is inserted into the mechanism channel 34, the elastic surface 601 abuts against the vibrating mechanism 801, and is compressed inwards under pressure until it is flush with the inner abutment surface 316. By increasing the contact between the elastic surface 601 and the vibrating mechanism 801, the direct contact between the elastic arm 315 and the vibrating mechanism 801 becomes more elastic and stable. The multiple hollowed-out positions 603 enhance the elastic deformation of the adhesive layer 600.

[0060] In this embodiment, there is an installation gap 202 between the end of the pin 200 and the end of the pin hole 313. A plurality of elastic rubber rings 500 are embedded in the outer wall of the pin 200. The plurality of rubber rings 500 are arranged at intervals along the axial direction of the pin 200 and are arranged around the pin 200 in the circumferential direction.

[0061] The pin 200 has multiple mounting grooves 209, which are spaced apart along the axial direction of the pin 200 and arranged around the circumference of the pin 200. A rubber ring 500 is embedded in the mounting groove 209, with its bottom abutting against the bottom of the mounting groove 209 and its top extending outside the mounting groove 209. There is a deformation gap 501 between the two sides of the rubber ring 500 and the inner sidewall of the mounting groove 209. A hollow groove 502 is provided in the middle of the rubber ring 500, which is arranged around the circumference of the rubber ring 500 and extends through the top of the rubber ring 500.

[0062] When the pin 200 is inserted into the brush body 100 and the insert block 300, the rubber ring 500 is subjected to pressure and elastically compressed and deformed towards the deformation gap 501 and the hollowed-out groove 502, and the rubber ring 500 is in a compressed state. Thus, because the rubber ring 500 is in a compressed state, it has a restoring force to recover its deformation outwards, allowing the pin 200 to be firmly inserted into the brush body 100 and the insert block 300. Furthermore, during the vibration of the vibrating mechanism 801, due to the presence of the rubber ring 500, not only is the elastic arm 315 driven to vibrate, but the entire insert block 300 also vibrates better with the vibrating mechanism 801, thereby achieving a better vibration transmission effect. The design of the deformation gap 501 and the hollowed-out groove 502 can improve the elastic deformation capability of the rubber ring 500.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An electric toothbrush head, characterized in that, The device includes a brush body and an insert block. The upper part of the brush body has a bristle section with bristles, and the lower part of the brush body has an insert cavity. The insert cavity has an installation opening at the bottom of the brush body. The insert block is inserted into the insert cavity through the installation opening, and the outer side wall of the insert block abuts against the inner side wall of the insert cavity. The insert block has a mechanism channel for inserting a flat vibrating mechanism. The mechanism channel has an insertion opening at the bottom of the insert block. The vibrating mechanism is inserted into the mechanism channel through the insertion opening and abuts against the inner side wall of the mechanism channel. The brush body is provided with a horizontally arranged pin, which passes through the insertion cavity and is inserted into the upper part of the insertion block. The pin fixes the upper part of the insertion block to the brush body. The bottom periphery of the insertion block extends outward to form a bottom abutment ring. The bottom abutment ring is arranged around the outer periphery of the insertion block and is located below the brush body, abutting against the bottom of the brush body from bottom to top. The brush body has a horizontally arranged mounting hole that connects to the insertion cavity. The pin is inserted into the mounting hole, and the inner end of the pin passes through the mounting hole, extends into the insertion cavity, and is inserted into the upper part of the insertion block. A longitudinally arranged step is formed in the middle of the mounting hole, and the outer end of the pin is provided with an end head. The end head is embedded and fixed in the mounting hole and abuts against the longitudinal step. The longitudinal step positions the lateral insertion depth of the pin. The end has an outwardly facing outer end face, which is exposed outside the mounting hole and is flush with the outer surface of the brush body. The insertion block has a notch in the middle, which connects to the movement channel. A longitudinally arranged elastic arm is provided in the notch, and the elastic arm abuts against the inner wall of the insertion cavity. When the vibrating movement is inserted into the movement channel, the vibrating movement abuts against the inner wall of the movement channel, and the elastic arm abuts against the vibrating movement. The insert includes a base and an insert shaft disposed on the base; the insert shaft is abutted to the top of the base, and the base and the insert shaft are integrally formed; the movement channel passes through the base and extends to the lower part of the insert shaft; the notch is disposed on the insert shaft, and the bottom abutment ring is disposed on the outer periphery of the bottom of the base; The insert shaft and the seat are respectively inserted into the insertion cavity, and the outer side wall of the insert shaft and the outer side wall of the seat abut against the inner side wall of the insertion cavity; the upper part of the insert shaft is solid and forms a fixed section, and the outer side wall of the fixed section abuts against the inner side wall of the insertion cavity; the fixed section is provided with a horizontally arranged pin hole, which is horizontally aligned with the mounting hole, and the pin shaft is inserted and fixed in the pin hole; There is an installation gap between the end of the pin and the end of the pin hole. Multiple elastic rubber rings are embedded in the outer wall of the pin. The multiple rubber rings are arranged at intervals along the axial direction of the pin and are arranged around the pin circumferentially. The pin has multiple mounting grooves, which are spaced apart along the axial direction of the pin and arranged around the circumference of the pin. The rubber ring is embedded in the mounting groove, with its bottom abutting against the bottom of the mounting groove and its top extending outside the mounting groove. There are deformation gaps between the two sides of the rubber ring and the inner sidewall of the mounting groove. The middle of the rubber ring has a hollow groove, which is arranged around the circumference of the rubber ring and extends through the top of the rubber ring. When the pin is inserted into the brush body and the insert block, the rubber ring is subjected to pressure and elastically compressed and deformed towards the deformation gap and the hollow groove, and the rubber ring is in a compressed state.

2. The electric toothbrush head as described in claim 1, characterized in that, The outer periphery of the fixed section is provided with a longitudinally arranged positioning surface, which is planar; the inner sidewall of the insertion cavity has a longitudinally arranged positioning sidewall, which is planar, and the positioning surface abuts against the positioning sidewall; the pin passes through the positioning sidewall and the positioning surface respectively.

3. The electric toothbrush head as described in claim 1, characterized in that, The lower part of the insertion shaft forms a vibration section, the mechanism channel extends into the vibration section, and the notch is provided in the vibration section; there is a vibration gap between the outer wall of the vibration section and the inner wall of the insertion cavity; the seat has an outwardly arranged outer peripheral sidewall, and along the direction in which the seat is inserted into the insertion cavity, the outer peripheral sidewall is arranged inwardly at an angle, and the outer peripheral sidewall abuts against the inner wall of the insertion cavity.

4. The electric toothbrush head as described in any one of claims 1 to 3, characterized in that, The upper end of the elastic arm is connected to the inner wall of the notch groove, and the lower end of the elastic arm extends into the notch groove and is freely arranged; the elastic arm has an inner abutting surface facing the movement channel and an outer abutting surface facing away from the movement channel, the inner abutting surface abuts against the vibrating movement, and the outer abutting surface abuts against the inner wall of the insertion cavity; the vibrating movement is provided with a transversely arranged transverse groove, and a transversely arranged transverse ridge protrudes from the inner abutting surface, the transverse ridge being embedded in the transverse groove.

5. The electric toothbrush head as described in claim 4, characterized in that, The upper part of the outer abutment surface is recessed towards the movement channel to form a recessed portion, and the lower part of the outer abutment surface protrudes outward to form a protruding portion; the thickness of the upper part of the elastic arm is less than the thickness of the lower part of the elastic arm, the protruding portion abuts against the inner wall of the insertion cavity, and there is an elastic gap between the recessed portion and the inner wall of the insertion cavity.

6. The electric toothbrush head as described in claim 4, characterized in that, The elastic arm has a longitudinally arranged interlayer groove in the middle, which penetrates the lower end of the elastic arm; the interlayer groove is filled with an elastic adhesive layer, which fills the entire interlayer groove and is under pressure in the interlayer groove; the adhesive layer passes through the elastic arm and extends to the inner abutment surface, forming an elastic surface protruding outside the inner abutment surface. The adhesive layer has multiple hollowed-out positions inside. When the vibrating core is inserted into the core channel, the elastic surface abuts against the vibrating core. The elastic surface is compressed inward by the pressure until it is flush with the inner abutting surface.

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