Brush disc fixing structure and electric toothbrush

Abstract

The utility model discloses a brush disc fixing structure and an electric toothbrush, and relates to the technical field of electric toothbrushes, the brush disc fixing structure comprises a brush disc, the brush disc comprises a disc body and a first connecting part arranged on one side of the disc body, and one end, far away from the disc body, of the first connecting part is provided with a limiting part; the brush handle comprises a body, the body is provided with a containing cavity with an opening in one side, a second connecting part is arranged on the inner wall of the containing cavity, and the first connecting part is rotatably connected to the second connecting part; the fixing piece is arranged on the brush handle in a penetrating mode, and the fixing piece abuts against the limiting part in a limiting mode; the technical scheme provided by the utility model has the technical effects that the first connecting part is provided with the limiting part, the fixing piece is arranged on the brush handle in a penetrating manner and is propped against the limiting part, and the fixing piece is matched with the limiting part to limit the brush disc to move towards the opening side of the accommodating cavity relative to the brush handle, so that the stability of transmission connection between the brush disc and the brush handle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric toothbrushes, in particular to a brush plate fixing structure and an electric toothbrush. Background Art

[0002] The electric toothbrush uses the power supply inside the body to supply power to the motor, which drives the drive shaft to rotate, thereby driving the eccentric shaft to rotate to generate eccentric force, so that the eccentric shaft drives the brush plate to rotate, thereby driving the bristles on the brush plate to move back and forth to clean the teeth, thus solving the problem of traditional manual brushing being laborious.

[0003] The brush disc of the existing electric toothbrush works by rapidly rotating back and forth when in use, but the transmission connection between the brush disc and the brush handle is unstable, so that the brush disc is easily separated from the brush handle, thereby affecting the use of the electric toothbrush. Utility Model Content

[0004] The main purpose of the utility model is to provide a brush plate fixing structure and an electric toothbrush, aiming to prevent the brush plate from being separated from the brush handle.

[0005] To achieve the above-mentioned purpose, the brush disc fixing structure proposed in the utility model comprises a brush disc, wherein the brush disc comprises a disc body and a first connecting portion provided on one side of the disc body, wherein a limiting portion is provided at one end of the first connecting portion away from the disc body;

[0006] A brush handle, wherein the brush disc is rotatably connected to the brush handle, the brush handle comprises a body, the body has a receiving cavity with one side open, a second connecting portion is provided on the inner wall of the receiving cavity, and the first connecting portion is rotatably connected to the second connecting portion;

[0007] A fixing member is provided through the brush handle, and the fixing member is in limiting contact with the limiting portion to limit the movement of the brush plate relative to the brush handle toward the open side of the accommodating cavity.

[0008] In one embodiment, the limiting portion is a baffle protruding from the first connecting portion, and the width of the limiting portion in the circumferential direction of the brush disc away from one end of the first connecting portion is greater than the width close to one end of the first connecting portion.

[0009] In one embodiment, the width of the limiting portion in the circumferential direction of the brush disc gradually decreases from an end of the limiting portion away from the first connecting portion toward an end close to the first connecting portion.

[0010] In one embodiment, the brush plate fixing structure also includes an eccentric shaft, which is rotatably disposed in the brush handle, and a first groove is provided on the side of the first connecting portion away from the limiting portion, and the driving end of the eccentric shaft is disposed in the first groove, and the eccentric shaft is transmission-connected to the brush plate.

[0011] In one embodiment, the brush plate fixing structure also includes a driving member and a driving shaft, the driving member is drivingly connected to the driving shaft, the driving shaft is drivingly connected to the eccentric shaft, and the driving member is used to drive the driving shaft to rotate, so that the driving shaft drives the eccentric shaft to rotate, and then drives the brush plate to rotate relative to the brush handle.

[0012] In one embodiment, a first connecting arm and a second connecting arm are provided on a side of the first connecting portion away from the limiting portion, and the first groove is formed between the first connecting arm and the second connecting arm.

[0013] In one embodiment, a first protrusion is provided on the inner side wall of the first connecting arm away from one end of the first connecting portion, a second protrusion is provided on the inner side wall of the second connecting arm away from one end of the first connecting portion, and the eccentric shaft periodically abuts against the first protrusion or the second protrusion.

[0014] In one embodiment, the first connecting portion is provided with a connecting hole, and the second connecting portion is inserted into the connecting hole, so that the first connecting portion is transmission-connected with the second connecting portion.

[0015] In one embodiment, the brush plate fixing structure further includes an elastic member, and the elastic member is elastically abutted between the first connecting portion and the second connecting portion.

[0016] The utility model also provides an electric toothbrush, comprising the brush disc fixing structure as described in any of the above embodiments.

[0017] The technical solution of the utility model adopts a method of providing a limiting portion at one end of the first connecting portion away from the disc body, and arranging a fixing piece that passes through the brush handle and abuts against the side wall of the open side of the limiting portion close to the accommodating cavity. The fixing piece cooperates with the limiting portion to limit the movement of the brush disc toward the open side of the accommodating cavity when the brush disc rotates relative to the brush handle, thereby improving the stability of the transmission connection between the brush disc and the brush handle, and preventing the brush disc from detaching from the brush handle when rotating. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0019] Figure 1 A structural schematic diagram of an embodiment of a brush plate fixing structure provided by the utility model;

[0020] Figure 2 A structural cross-sectional view of an embodiment of a brush plate fixing structure provided by the utility model;

[0021] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0022] Figure 4 This is a schematic diagram of the connection between the brush disc and the eccentric shaft of the brush disc fixing structure provided by the utility model.

[0023] Description of Figure Numbers:

[0024] 1. Brush plate; 11. Plate body; 12. First connecting part; 121. Limiting part; 122. First groove; 123. First connecting arm; 1231. First protrusion; 124. Second connecting arm; 1241. Second protrusion; 125. Connecting hole; 2. Brush handle; 21. Main body; 22. Accommodating cavity; 221. Second connecting part; 3. Fixing member; 4. Eccentric shaft; 5. Driving member; 6. Driving shaft; 7. Elastic member.

[0025] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0028] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0029] The electric toothbrush supplies power to the motor through the power supply in the body, and the motor drives the driving shaft 6 to rotate, thereby driving the eccentric shaft 4 to rotate to generate eccentric force, so that the eccentric shaft 4 drives the brush plate 1 to rotate, thereby driving the bristles on the brush plate 1 to move back and forth to clean the teeth, thereby solving the problem of traditional manual brushing that is laborious.

[0030] However, in the process of conceiving and implementing this application, the inventor found that there are at least the following problems:

[0031] In the existing electric toothbrush, the brush disc 1 works by rapidly rotating back and forth during use, but the transmission connection between the brush disc 1 and the brush handle 2 is unstable, so that the brush disc 1 is easily separated from the brush handle 2, thereby affecting the use of the electric toothbrush.

[0032] The utility model provides a brush plate fixing structure.

[0033] See also Figures 1 to 3 In one embodiment of the utility model, the brush disc fixing structure includes a brush disc 1, the brush disc 1 includes a disc body 11, and a first connecting portion 12 provided on one side of the disc body 11, and a limiting portion 121 is provided at one end of the first connecting portion 12 away from the disc body 11;

[0034] A brush handle 2, the brush disc 1 is rotatably connected to the brush handle 2, the brush handle 2 comprises a body 21, the body 21 has a receiving cavity 22 with one side open, the inner wall of the receiving cavity 22 is provided with a second connecting portion 221, the first connecting portion 12 is rotatably connected to the second connecting portion 221;

[0035] A fixing member 3, wherein the fixing member 3 is inserted through the brush handle 2, and the fixing member 3 is in limiting contact with the limiting portion 121 to limit the movement of the brush plate 1 relative to the brush handle 2 toward the open side of the accommodating cavity 22;

[0036] The technical solution of the utility model adopts a first connection part 12 with a limiting part 121 at one end away from the disc body 11, and a fixing member 3 is arranged to pass through the brush handle 2 and abut against the open side wall of the limiting part 121 close to the accommodating cavity 22. The fixing member 3 cooperates with the limiting part 121 to limit the movement of the brush disc 1 toward the open side of the accommodating cavity 22 when the brush handle 2 rotates, thereby improving the stability of the transmission connection between the brush disc 1 and the brush handle 2, and preventing the brush disc 1 from detaching from the brush handle 2 when rotating.

[0037] In this embodiment, the brush plate 1 includes a plate body 11, a first connecting portion 12 is provided on a side of the plate body 11 away from the bristles, and a limiting portion 121 is provided on an end of the first connecting portion 12 away from the plate body 11. The first connecting portion 12 can be set to a cylindrical shape, and the second connecting portion 221 can be set to a cylindrical shape corresponding to the first connecting portion 12. The brush handle 2 includes a body 21, the body 21 has a receiving cavity 22 with an open side, the inner wall of the receiving cavity 22 is provided with a second connecting portion 221, the second connecting portion 221 is extended in a direction close to the open side of the receiving cavity 22, and the first connecting portion 12 is rotatably connected to the second connecting portion 221. A support block can be provided on the top of the body 21, the support block is provided on the inner wall of the receiving cavity 22, and a through hole that penetrates the body 21 and the support block can be provided on the top of the body 21, and the fixing member 3 is inserted in the through hole, and the support block is used to increase the contact area between the fixing member 3 and the body 21, thereby improving the stability of the connection between the fixing member 3 and the body 21. The fixing member 3 is in contact with a side surface of the limiting portion 121 close to the open side of the accommodating chamber 22, thereby limiting the first connecting portion 12 from moving relative to the second connecting portion 221 toward the open side of the accommodating chamber 22, thereby limiting the brush disc 1 from moving relative to the brush handle 2 toward the open side of the accommodating chamber 22, thereby improving the stability of the transmission connection between the brush disc 1 and the brush handle 2, thereby preventing the brush disc 1 from being separated from the brush handle 2 when rotating. The disc body 11 may be provided with a first rotating portion and a second rotating portion, and the first rotating portion and the second rotating portion may be arranged on the disc body 11 in a mirror-image manner with the axis of the first connecting portion 12 as the axis. The inner walls on both sides of the accommodating chamber 22 may be provided with a first blocking portion and a second blocking portion, and the first blocking portion and the second blocking portion may be arranged on the inner side wall of the accommodating chamber 22 in a mirror-image manner with the axis of the second connecting portion 221 as the axis. The first blocking portion is in contact with the first rotating portion, and the second blocking portion is in contact with the second rotating portion, thereby further limiting the brush disc 1 from moving relative to the brush handle 2 toward the open side of the accommodating chamber 22, thereby preventing the brush disc 1 from being separated from the brush handle 2 when rotating.

[0038] like Figure 1 and Figure 4 As shown, in this embodiment, the limiting portion 121 is a baffle protruding from the first connecting portion 12 , and the width of the limiting portion 121 in the circumferential direction of the brush plate 1 away from the first connecting portion 12 is greater than the width close to the first connecting portion 12 .

[0039] In this embodiment, in order to save the manufacturing material cost of the limiting portion 121, the shape of the limiting portion 121 can be set to be fan-shaped. The limiting portion 121 is a baffle convexly arranged at one end of the first connecting portion 12, and the limiting portion 121 can be formed and arranged integrally with the first connecting portion 12, thereby improving the production efficiency of the brush plate 1. By setting the width of the limiting portion 121 along the circumferential direction of the brush plate 1 away from the end of the first connecting portion 12 is greater than the width of the end close to the first connecting portion 12, it is ensured that the manufacturing material cost of the limiting portion 121 is further saved without affecting the limiting cooperation between the limiting portion 121 and the fixing member 3.

[0040] like Figure 1 and Figure 4 As shown, in this embodiment, the width of the limiting portion 121 in the circumferential direction of the brush plate 1 gradually decreases from the end of the limiting portion 121 away from the first connecting portion 12 toward the end close to the first connecting portion 12 .

[0041] In this embodiment, the width of the limiting portion 121 in the circumferential direction of the brush disc 1 is gradually reduced from the end of the limiting portion 121 away from the first connecting portion 12 toward the end close to the first connecting portion 12, thereby ensuring that the limiting cooperation between the limiting portion 121 and the fixing member 3 is not affected, and the manufacturing material cost of the limiting portion 121 is further saved.

[0042] like Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, the brush plate fixing structure also includes an eccentric shaft 4, and the eccentric shaft 4 is rotatably disposed in the brush handle 2. A first groove 122 is provided on the side of the first connecting portion 12 away from the limiting portion 121, and the driving end of the eccentric shaft 4 is disposed in the first groove 122, and the eccentric shaft 4 is transmission-connected to the brush plate 1.

[0043] In this embodiment, the eccentric shaft 4 is provided with a transmission connection with the brush plate 1, so that the user can control the frequency of rotation of the brush plate 1 by controlling the frequency of rotation of the eccentric shaft 4. When the eccentric shaft 4 rotates, it can periodically abut against any one side of the inner wall on both sides of the first groove 122, so that the power generated by the eccentric shaft 4 is transmitted to the brush plate 1 through the first groove 122, thereby driving the brush plate 1 to rotate. The first groove 122 can be consistent with the length of the first connecting portion 12 along the axial direction of the first connecting portion 12, so that it is more convenient for the eccentric shaft 4 to periodically abut against the inner wall of the first groove 122 by rotation to drive the brush plate 1 to rotate.

[0044] like Figure 2 , Figure 3 and Figure 4As shown, in this embodiment, the brush plate fixing structure also includes a driving member 5 and a driving shaft 6, the driving member 5 is transmission-connected to the driving shaft 6, the driving shaft 6 is transmission-connected to the eccentric shaft 4, and the driving member 5 is used to drive the driving shaft 6 to rotate, so that the driving shaft 6 drives the eccentric shaft 4 to rotate, and further drives the brush plate 1 to rotate relative to the brush handle 2.

[0045] In this embodiment, the driving member 5 further includes a motor and a transmission shaft, the output end of the motor is transmission-connected to the transmission shaft, the other end of the transmission shaft is transmission-connected to the driving shaft 6, and the other end of the driving shaft 6 is transmission-connected to the eccentric shaft 4. The motor is used to drive the driving shaft 6 to rotate via the transmission shaft, so that the driving shaft 6 drives the eccentric shaft 4 to rotate, and then drives the brush plate 1 to rotate relative to the brush handle 2. By controlling the rotation rate of the motor, the rotation frequency of the eccentric shaft 4 is controlled, and then the rotation frequency of the brush plate 1 is controlled.

[0046] In this embodiment, the driving shaft 6 includes a shaft body 21 and a connecting section provided at one end of the shaft body 21, the transmission shaft is provided with a shaft hole for the connecting section to be inserted, the outer peripheral surface of the connecting section is provided with a transmission part, and the inner wall surface of the shaft hole is provided with a matching part for transmission with the transmission part. When the connecting section is inserted into the shaft hole, the transmission part abuts against the matching part, so that the power generated by the motor is more stably transmitted to the driving shaft 6, so that the driving shaft 6 rotates more stably, thereby improving the stability of the transmission connection between the driving member 5 and the driving shaft 6, and thereby making the brush plate 1 rotate more stably relative to the brush handle 2.

[0047] like Figure 3 and Figure 4 As shown, in this embodiment, a first connecting arm 123 and a second connecting arm 124 are provided on a side of the first connecting portion 12 away from the limiting portion 121 , and a first groove 122 is formed between the first connecting arm 123 and the second connecting arm 124 .

[0048] In this embodiment, a first connecting arm 123 and a second connecting arm 124 are provided on a side of the first connecting portion 12 away from the limiting portion 121, thereby improving the strength of the inner wall of the first groove 122, thereby avoiding damage caused by multiple collisions of the eccentric shaft 4 during rotation, thereby increasing the service life of the brush disc 1.

[0049] like Figure 3 and Figure 4 As shown, in this embodiment, the inner side wall of the first connecting arm 123 away from one end of the first connecting portion 12 is provided with a first protrusion 1231, and the inner side wall of the second connecting arm 124 away from one end of the first connecting portion 12 is provided with a second protrusion 1241, and the eccentric shaft 4 periodically abuts against the first protrusion 1231 or the second protrusion 1241.

[0050] In this embodiment, a first protrusion 1231 is provided at one end of the first connecting arm 123 away from the first connecting portion 12, and a second protrusion 1241 is provided at one end of the second connecting arm 124 away from the first connecting portion 12. The first protrusion 1231 and the second protrusion 1241 can be arranged relative to each other in a mirror image with the central axis of the first connecting portion 12 as the axis, thereby further improving the strength of the first connecting arm 123 and the second connecting arm 124. The eccentric shaft 4 periodically abuts against the first protrusion 1231 or the second protrusion 1241, and the convex surfaces of the first protrusion 1231 and the second protrusion 1241 can more effectively cooperate with the eccentric shaft 4 in transmission than the flat surface, thereby improving the efficiency of the eccentric shaft 4 in transmitting power to the brush plate 1.

[0051] like Figure 3 and Figure 4 As shown, in this embodiment, the first connection part 12 is provided with a connection hole 125 , and the second connection part 221 is inserted into the connection hole 125 , so that the first connection part 12 is transmission-connected with the second connection part 221 .

[0052] In this embodiment, the second connection portion 221 is inserted into the connection hole 125 so that the first connection portion 12 can rotate relative to the second connection portion 221 , thereby further improving the stability of the first connection portion 12 rotating relative to the second connection portion 221 .

[0053] like Figures 1 to 3 As shown, in this embodiment, the brush plate fixing structure further includes an elastic member 7 , and the elastic member 7 is elastically abutted between the first connecting portion 12 and the second connecting portion 221 .

[0054] In this embodiment, the elastic member 7 may be a spring, the second connection portion 221 may be provided with a mounting hole, the elastic member 7 is provided in the mounting hole, one end of the elastic member 7 elastically abuts against the inner wall of the mounting hole, and the other end of the elastic member 7 abuts against the inner wall of the connection hole 125. The elastic member 7 is used to provide tension for the connection between the first connection portion 12 and the second connection portion 221, thereby further limiting the movement of the first connection portion 12 relative to the second connection portion 221 toward the open side of the accommodating cavity 22, thereby preventing the brush disc 1 from falling off the brush handle 2 when rotating.

[0055] The utility model also proposes an electric toothbrush, which includes a brush disc fixing structure. The specific structure of the brush disc fixing structure refers to the above-mentioned embodiment. Since the electric toothbrush adopts all the technical solutions of all the above-mentioned embodiments, it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0056] In this embodiment, the electric toothbrush includes a brush plate 1, a brush handle 2 and a body. The brush plate 1 is rotatably connected to the brush handle 2, and the brush handle 2 is connected to the body. The body is provided with a driving member 5, and the driving member 5 includes a motor, a motor housing, a positive electrode connecting piece, a negative electrode connecting piece, a switch connecting piece, a battery, a transmission shaft and a drive shaft 6. The motor housing is arranged in the body, the motor is installed in the motor housing, and the negative pole of the motor is arranged on the motor housing. The motor is drivingly connected to the transmission shaft, the transmission shaft is drivingly connected to the drive shaft 6, and the drive shaft 6 is drivingly connected to the eccentric shaft 4. The battery is arranged in the body, and the negative electrode connecting piece is connected to the negative pole of the battery. The two ends of the positive electrode connecting piece are respectively connected to the motor and the battery, so that the positive pole of the motor is connected to the positive pole of the battery. A button is provided on one side of the body, and the switch connecting piece is connected to the negative connecting piece. The button is transmission-connected to the switch connecting piece. The user can press the button to connect the switch connecting piece to the negative pole of the motor on the motor housing, thereby conveniently turning on the electric toothbrush, so that the motor drives the transmission shaft to rotate, the transmission shaft drives the drive shaft 6 to rotate, the drive shaft 6 drives the eccentric shaft 4 to rotate, and then the eccentric shaft 4 drives the brush disc 1 to rotate relative to the brush handle 2.

[0057] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A brush plate fixing structure, characterized in that: include: A brush plate, the brush plate comprising a plate body and a first connecting portion provided on one side of the plate body, wherein a limiting portion is provided at one end of the first connecting portion away from the plate body; A brush handle, wherein the brush disc is rotatably connected to the brush handle, the brush handle comprises a body, the body has a receiving cavity with one side open, a second connecting portion is provided on the inner wall of the receiving cavity, and the first connecting portion is rotatably connected to the second connecting portion; A fixing member is provided through the brush handle, and the fixing member is in limiting contact with the limiting portion to limit the movement of the brush plate relative to the brush handle toward the open side of the accommodating cavity.

2. The brush plate fixing structure according to claim 1, characterized in that: The limiting portion is a baffle protruding from the first connecting portion, and the width of the limiting portion in the circumferential direction of the brush disc away from one end of the first connecting portion is greater than the width of the limiting portion close to one end of the first connecting portion.

3. The brush plate fixing structure according to claim 1, characterized in that: The width of the limiting portion in the circumferential direction of the brush disc gradually decreases from an end of the limiting portion away from the first connecting portion toward an end close to the first connecting portion.

4. The brush plate fixing structure according to claim 1, characterized in that: The brush plate fixing structure also includes an eccentric shaft, which is rotatably arranged in the brush handle. A first groove is provided on the side of the first connecting part away from the limiting part. The driving end of the eccentric shaft is arranged in the first groove, and the eccentric shaft is transmission-connected to the brush plate.

5. The brush plate fixing structure according to claim 4, characterized in that: The brush plate fixing structure also includes a driving member and a driving shaft, wherein the driving member is drivingly connected to the driving shaft, and the driving shaft is drivingly connected to the eccentric shaft, and the driving member is used to drive the driving shaft to rotate, so that the driving shaft drives the eccentric shaft to rotate, thereby driving the brush plate to rotate relative to the brush handle.

6. The brush plate fixing structure according to claim 4, characterized in that: A first connecting arm and a second connecting arm are provided on a side of the first connecting portion away from the limiting portion, and the first groove is formed between the first connecting arm and the second connecting arm.

7. The brush plate fixing structure according to claim 6, characterized in that: A first protrusion is provided on the inner side wall of the first connecting arm away from one end of the first connecting portion, a second protrusion is provided on the inner side wall of the second connecting arm away from one end of the first connecting portion, and the eccentric shaft periodically abuts against the first protrusion or the second protrusion.

8. The brush plate fixing structure according to claim 1, characterized in that: The first connecting part is provided with a connecting hole, and the second connecting part is inserted into the connecting hole, so that the first connecting part and the second connecting part are transmission-connected.

9. The brush plate fixing structure according to any one of claims 1 to 8, characterized in that: The brush plate fixing structure includes an elastic member, and the elastic member is elastically abutted between the first connecting portion and the second connecting portion.

10. An electric toothbrush, characterized in that: It comprises the brush plate fixing structure as claimed in any one of claims 1 to 9.

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