Electric toothbrush handle and electric toothbrush

Abstract

The utility model discloses an electric toothbrush handle and an electric toothbrush and relates to the technical field of electric toothbrush waterproofness, the electric toothbrush handle comprises a shell, a motor assembly, a transmission shaft, a sealing piece and a supporting piece, one end of the shell is provided with an opening, the motor assembly is fixedly installed in the shell, one end of the transmission shaft is connected with the motor assembly, and the other end of the transmission shaft is connected with the supporting piece. The other end of the transmission shaft penetrates through the opening to be arranged outside the shell and used for installing the brush head, the sealing piece is arranged at the opening and arranged on the transmission shaft in a sleeving mode, the sealing piece is installed on the shell in a limited mode so as to seal a gap between the transmission shaft and the shell, the supporting piece is arranged in the shell, and the end, away from the opening, of the supporting piece is connected with the motor assembly. The supporting piece is matched with the shell to limit and install the sealing piece, the sealing piece is limited to move in the axis direction of the transmission shaft, the relative position between the sealing piece and the transmission shaft and the relative position between the sealing piece and the shell can be kept, and the waterproof effect of the electric toothbrush is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waterproof technology of electric toothbrushes, and particularly relates to an electric toothbrush handle and an electric toothbrush. Background Art

[0002] In the electric toothbrushes on the market, a cooperation structure of a motor and a transmission shaft is usually adopted to transmit vibration to the toothbrush head. An opening for the transmission shaft to pass through needs to be opened on the housing. Since components such as a battery and a circuit board are arranged in the housing, the waterproof property at the housing opening is particularly important. In the existing solutions, generally, a silica gel part is fixed by a top cover, or the housing and the transmission shaft are directly connected by the silica gel part to seal the gap therebetween. However, such sealing methods have potential hazards. When the high-frequency vibration of the motor causes the silica gel part to loosen, the environmental temperature changes cause the silica gel part to expand and contract thermally, or the silica gel part ages, etc., water may still enter the housing through the gaps between the housing and the silica gel part / the silica gel part and the transmission shaft, thereby damaging the components in the housing, and the sealing effect of the existing technical solutions is not good. Content of the Utility Model

[0003] The main purpose of the utility model is to provide an electric toothbrush handle and an electric toothbrush, aiming to improve the problem of poor sealing effect of the electric toothbrush.

[0004] To achieve the above purpose, the electric toothbrush handle provided by the utility model includes:

[0005] A housing, one end of the housing is provided with an opening;

[0006] A motor assembly, arranged in the housing;

[0007] A transmission shaft, one end of the transmission shaft is connected to the motor assembly, and the other end of the transmission shaft extends out of the housing from the opening for installing a toothbrush head;

[0008] A seal, arranged at the opening, the seal is sleeved on the transmission shaft and is limit-mounted on the housing to seal the gap between the transmission shaft and the housing; and

[0009] A support member, arranged in the housing, one end of the support member far from the opening is connected to the motor assembly, and one end of the support member close to the opening abuts against the seal.

[0010] In an embodiment, the support member is a cylindrical shape with both ends open, the support member is sleeved on the transmission shaft and is arranged between the seal and the motor assembly, a notch groove is arranged on one side of the seal facing the support member, and one end of the support member far from the motor assembly abuts against the groove wall of the notch groove.

[0011] In one embodiment, a clamping portion is convexly provided in the housing near the opening in a direction away from the brush head. The seal is provided with a limiting portion corresponding to the clamping portion, and the limiting portion is connected to the clamping portion so that the seal is limit-mounted on the housing.

[0012] In one embodiment, a supporting portion is provided at a position of the supporting member near the clamping portion. The limiting portion is provided between the supporting portion and the clamping portion, and the supporting portion and the clamping portion clamp the limiting portion.

[0013] In one embodiment, the electric toothbrush handle further includes an elastic member. The seal is arranged to extend along the length direction of the transmission shaft, and the elastic member is sleeved on the outer side wall of the seal.

[0014] In one embodiment, protrusions are provided on the contact surface between the seal and the housing, and the protrusions are arranged in a ring shape along the circumference of the seal.

[0015] In one embodiment, the motor assembly includes a motor and a motor bracket. The motor is installed in the motor bracket, and the motor bracket is fixedly connected to the housing. One end of the transmission shaft away from the brush head passes through the motor bracket to connect the motor, and the motor is used to drive the transmission shaft to swing along the axial direction.

[0016] In one embodiment, the electric toothbrush handle further includes a connecting member. One end of the supporting member near the motor bracket is provided with a connecting portion, and a through hole is provided through the connecting portion. The connecting member is used to pass through the through hole to connect the motor bracket so that the supporting member is fixedly connected to the motor bracket.

[0017] In one embodiment, a guiding post is further provided on one side of the connecting portion facing the motor bracket. The guiding post is arranged at an interval from the through hole, and a guiding groove is provided on the motor bracket corresponding to the guiding post. The guiding post is used to be inserted into the guiding groove so that the supporting member is limit-mounted on the motor bracket.

[0018] The present utility model further provides an electric toothbrush, including the electric toothbrush handle in any of the foregoing embodiments.

[0019] The technical solution of the present utility model improves the waterproof effect of the electric toothbrush by arranging a support member and a housing to limit and install a seal. Specifically, the handle of the electric toothbrush includes a housing, a motor assembly, a transmission shaft, a seal, and a support member. One end of the housing is provided with an opening. The motor assembly is fixedly installed inside the housing. One end of the transmission shaft is connected to the motor assembly, and the other end of the transmission shaft passes through the opening and is arranged outside the housing for the brush head to be inserted and removed. The seal is arranged at the opening and sleeved on the transmission shaft, and the part of the seal in contact with the housing is limit-installed on the housing to seal the gap between the transmission shaft and the housing. The support member is arranged inside the housing, and the end of the support member far away from the opening is connected to the motor assembly, and the end of the support member close to the opening abuts against the seal.

[0020] It should be noted that the seal is limit-installed on the housing, which can prevent the seal from moving out of the housing along the axial direction of the transmission shaft, avoiding the seal disengaging from the opening to ensure the stability of the sealing effect. Further, the motor assembly is fixedly connected to the housing, the end of the support member far away from the opening is connected to the motor assembly, and the end of the support member close to the opening abuts against the seal, which can prevent the seal from moving into the housing along the axial direction of the transmission shaft, avoiding the seal sinking into the housing and generating a gap at the opening. As can be seen from the above, by arranging the support member to cooperate with the housing to limit and install the seal, restricting the movement of the seal along the axial direction of the transmission shaft, the relative positions of the seal, the transmission shaft, and the housing can be maintained, preventing the displacement of the seal caused by factors such as the vibration of the motor assembly and thermal expansion and contraction, and further avoiding the generation of gaps between the seal and the transmission shaft and between the seal and the housing, effectively improving the waterproof effect of the electric toothbrush. Brief Description of the Drawings

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0022] Figure 1 It is a schematic structural diagram of an embodiment of the electric toothbrush provided by the present utility model;

[0023] Figure 2 For Figure 1 the split structural diagram of the electric toothbrush in;

[0024] Figure 3 It is a schematic structural diagram of the seal in an embodiment of the handle of the electric toothbrush provided by the present utility model;

[0025] Figure 4Schematic diagram of the structure of the support member and the connecting member in an embodiment of the electric toothbrush handle provided by the present utility model;

[0026] Figure 5 is Figure 1 a cross-sectional view taken along the A-A direction in;

[0027] Figure 6 is Figure 5 an enlarged view of the position indicated by the B arrow in.

[0028] Explanation of the reference numerals in the drawings:

[0029] 100, electric toothbrush handle; 110, housing; 111, opening; 112, clamping portion; 120, motor assembly; 121, motor; 122, motor bracket; 122a, guide groove; 130, transmission shaft; 140, seal; 140a, notch groove; 141, limiting portion; 142, protrusion; 150, support member; 151, support portion; 152, connecting portion; 152a, through hole; 152b, guide post; 160, elastic member; 170, connecting member; 180, battery; 181, battery bracket; 182, circuit board; 183, gasket; 190, bottom cover; 191, O-ring; 192, charging coil holder.

[0030] 10, electric toothbrush; 200, brush head; 300, charging base.

[0031] The realization of the purpose, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0033] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative position relationship and movement conditions between the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if the embodiments of the present utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes scenario A, or scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or inability to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0035] The present utility model provides an electric toothbrush handle.

[0036] Please refer to Figures 1 to 6 , in an embodiment of the present utility model, the electric toothbrush handle 100 includes a housing 110, a motor assembly 120, a transmission shaft 130, a seal 140, and a support member 150. An opening 111 is provided at one end of the housing 110. The motor assembly 120 is fixedly installed inside the housing 110. One end of the transmission shaft 130 is connected to the motor assembly 120, and the other end of the transmission shaft 130 passes through the opening 111 and is disposed outside the housing 110 for the detachable installation of the toothbrush head 200. The seal 140 is provided at the opening 111 and sleeved on the transmission shaft 130, and the portion of the seal 140 in contact with the housing 110 is limit-mounted on the housing 110 to seal the gap between the transmission shaft 130 and the housing 110. The support member 150 is disposed inside the housing 110, and one end of the support member 150 away from the opening 111 is connected to the motor assembly 120, and one end of the support member 150 close to the opening 111 abuts against the seal 140.

[0037] It should be noted that the seal 140 is installed on the housing 110 in a limited manner, which can prevent the seal 140 from moving out of the housing 110 along the axis of the transmission shaft 130, avoiding the separation of the seal 140 from the opening 111 to ensure the stability of the sealing effect. Further, the motor assembly 120 is fixedly connected to the housing 110. One end of the support member 150 far from the opening 111 is connected to the motor assembly 120, and one end of the support member 150 close to the opening 111 abuts against the seal 140, which can prevent the seal 140 from moving into the housing 110 along the axis of the transmission shaft 130, avoiding the depression of the seal 140 into the housing 110 and generating a gap at the opening 111. As can be seen from the above, by arranging the support member 150 to cooperate with the housing 110 to install the seal 140 in a limited manner and restricting the movement of the seal 140 along the axis of the transmission shaft 130, the relative positions between the seal 140, the transmission shaft 130 and the housing 110 can be maintained, preventing the displacement of the seal 140 caused by factors such as the vibration and thermal expansion and contraction of the motor assembly 120, and further avoiding the generation of gaps between the seal 140 and the transmission shaft 130 and between the seal 140 and the housing 110, resulting in water ingress, effectively improving the waterproof effect of the electric toothbrush 10.

[0038] In one embodiment, the support member 150 is a cylindrical shape with openings 111 at both ends. The support member 150 is sleeved on the transmission shaft 130 and is arranged between the seal 140 and the motor assembly 120. A notch groove 140a is provided on the side of the seal 140 facing the support member 150, and one end of the support member 150 far from the motor assembly 120 abuts against the groove wall of the notch groove 140a.

[0039] As Figures 2 to 6 shown, in one embodiment of the present utility model, the support member 150 is a cylindrical shape with a hollow interior and openings 111 at both ends. The support member 150 is sleeved on the transmission shaft 130. One end of the transmission shaft 130 far from the motor assembly 120 passes through the interior of the support member 150 and extends out of the housing 110. And the support member 150 is arranged between the seal 140 and the motor assembly 120. The seal 140 is an annular structure, and the material is usually made of silica gel. The side of the seal 140 facing the support member 150 is recessed away from the support member 150 to form a notch groove 140a. The notch groove 140a is arranged around the transmission shaft 130 for one week. One end of the support member 150 far from the motor assembly 120 is inserted into the notch groove 140a and abuts against the groove wall to prevent the seal 140 from moving into the housing 110 along the axis of the transmission shaft 130 and ensuring the sealing effect of the seal 140.

[0040] In one embodiment, a clamping portion 112 is protrudingly provided in the housing 110 near the opening 111 in a direction away from the brush head 200. The seal 140 is provided with a limiting portion 141 corresponding to the clamping portion 112. The limiting portion 141 is connected to the clamping portion 112 so that the seal 140 is limit-mounted on the housing 110.

[0041] As Figure 6 shown, in an embodiment of the present utility model, a clamping portion 112 is protrudingly provided at the edge of the housing 110 near the opening 111 in a direction away from the brush head 200. The clamping portion 112 is annularly arranged around the circumference of the transmission shaft 130. A limiting portion 141 matching the shape of the clamping portion 112 is provided at a position of the seal 140 close to the clamping portion 112. The limiting portion 141 is also annularly arranged around the circumference of the transmission shaft 130. It can be seen from the figure that the cross-sectional projection of the connection between the limiting portion 141 and the clamping portion 112 is hook-shaped, so that the limiting portion 141 hooks the clamping portion 112 to prevent the seal 140 from moving out of the housing 110 along the axis direction of the transmission shaft 130, so as to maintain the relative positions of the seal 140, the housing 110 and the transmission shaft 130, and further ensure the sealing effect.

[0042] In one embodiment, a supporting portion 151 is provided at a position of the support member 150 close to the clamping portion 112. The limiting portion 141 is arranged between the supporting portion 151 and the clamping portion 112, and the supporting portion 151 and the clamping portion 112 clamp the limiting portion 141.

[0043] As Figures 4 to 6 shown, in an embodiment of the present utility model, a supporting portion 151 is provided at a position of the support member 150 close to the clamping portion 112. The supporting portion 151 is stepped and has a supporting plane abutting against the limiting portion 141, and the supporting plane is oppositely arranged with the clamping portion 112. The limiting portion 141 is hooked on the clamping portion 112, and the supporting portion 151 of the support member 150 abuts against the limiting portion 141 in a direction close to the clamping portion 112 to fix the seal 140 at the opening 111 of the housing 110 and limit the movement of the seal 140. In addition, the supporting portion 151 cooperates with the clamping portion 112 to clamp the limiting portion 141, which can further improve the sealing effect between the seal 140 and the housing 110 and prevent water from entering the housing 110 from the connection between the limiting portion 141 and the clamping member. As can be seen above, the cooperation of the clamping portion 112, the limiting portion 141 and the supporting portion 151 can play a technical effect of limit-mounting the seal 140 and improving the sealing performance at the same time.

[0044] In one embodiment, the electric toothbrush handle 100 further includes an elastic member 160. The seal 140 is arranged to extend along the length direction of the transmission shaft 130, and the elastic member 160 is sleeved on the outer side wall of the seal 140.

[0045] As Figure 2 andFigure 6 As shown in the figure, in an embodiment of the present utility model, the portion of the seal 140 sleeved on the drive shaft 130 extends towards the motor assembly 120, which can increase the contact area between the seal 140 and the drive shaft 130, increase the distance of water leakage, and improve the waterproof performance. Further, an elastic member 160 is additionally provided on the electric toothbrush handle 100. The elastic member 160 is a fastening spring sleeved on the outer side wall of the seal 140. The fastening spring binds a part of the structure of the seal 140 to the drive shaft 130 to improve the fitting degree between the seal 140 and the drive shaft 130, prevent water from entering the housing 110 through the gap between the seal 140 and the drive shaft 130, and further improve the sealing effect at the opening 111 of the housing 110.

[0046] In an embodiment, a protrusion 142 is provided on the contact surface between the seal 140 and the housing 110. The protrusion 142 is annularly arranged along the circumferential direction of the seal 140.

[0047] As Figure 3 and Figure 6 As shown in the figure, in an embodiment of the present utility model, a protrusion 142 is provided on the opposite surface of the side wall of the seal 140 and the opening 111 of the housing 110. The protrusion 142 is annularly arranged around the circumferential direction of the drive shaft 130. The protrusion 142 is used to abut against the side wall at the opening 111 so that the seal 140 and the housing 110 form an interference fit. The seal 140 being in a compressed state at all times can ensure the tightness of the abutment against the side wall at the opening 111, effectively improving the waterproof performance of the electric toothbrush handle 100.

[0048] In an embodiment, the motor assembly 120 includes a motor 121 and a motor bracket 122. The motor 121 is installed in the motor bracket 122. The motor bracket 122 is fixedly connected to the housing 110. One end of the drive shaft 130 away from the brush head 200 passes through the motor bracket 122 to connect to the motor 121. The motor 121 is used to drive the drive shaft 130 to swing along the axial direction.

[0049] As Figure 3As shown, in an embodiment of the present utility model, the motor assembly 120 includes a motor 121 and a motor bracket 122. The motor 121 is installed inside the motor bracket 122 and connected to the transmission shaft 130. The motor bracket 122 is fixedly connected to the housing 110 by screws. A magnet (not shown) is installed at one end of the transmission shaft 130 that extends into the motor 121. A coil assembly (not shown) is provided inside the motor 121. The coil assembly covers the magnet and is used to drive the magnet to swing axially around the transmission shaft 130 after being energized, so that the magnet drives the transmission shaft 130 to rotate back and forth along its own axis. The transmission shaft 130 transmits torque to the brush head 200, so that the brush head 200 makes periodic high-frequency swings. The brushing action at this high frequency can generate a strong cavitation effect and pulse effect massage function at the tip of the bristles, which can not only effectively clean the tooth surface, but also effectively clean the dental plaque and dental calculus deep in the tooth gaps, and massage the gums, which is beneficial to dental health.

[0050] In one embodiment, the electric toothbrush handle 100 further includes a connecting member 170. One end of the support member 150 close to the motor bracket 122 is provided with a connecting portion 152. A through hole 152a is provided through the connecting portion 152. The connecting member 170 is used to pass through the through hole 152a to connect the motor bracket 122, so that the support member 150 is fixedly connected to the motor bracket 122.

[0051] As Figure 2 and Figure 4 As shown, in an embodiment of the present utility model, one end of the support member 150 close to the motor bracket 122 is provided with a connecting portion 152. In order to save internal space, the connecting portion 152 is arranged in a fan shape around the support member 150. A through hole 152a is provided through the connecting portion 152. A threaded hole is provided on the motor bracket 122 corresponding to the through hole 152a. The connecting member 170 passes through the through hole 152a and is threadedly connected to the threaded hole to fix the support member 150 on the motor bracket 122. In this embodiment, the connecting member 170 is a countersunk head screw. Of course, in some other embodiments of the present utility model, the connecting member 170 can also be a dowel pin, an expansion screw, etc., as long as the support member 150 can be fixedly connected to the motor bracket 122, and no specific limitation is made here.

[0052] In one embodiment, a guiding column 152b is further provided on one side of the connecting portion 152 facing the motor bracket 122. The guiding column 152b is spaced from the through hole 152a. A guiding groove 122a is provided on the motor bracket 122 corresponding to the guiding column 152b. The guiding column 152b is used to be inserted into the guiding groove 122a to limit the installation of the support member 150 on the motor bracket 122.

[0053] As Figure 2 and Figure 4As shown, in an embodiment of the present utility model, in order to facilitate the installation of the support member 150, a guiding post 152b protrudes from one side of the connecting portion 152 facing the motor bracket 122, and the guiding post 152b is spaced from the through hole 152a. A guiding groove 122a is recessed on the motor bracket 122 in a direction away from the brush head 200. The guiding groove 122a is for the guiding post 152b to be inserted, guiding the support member 150 to be limitedly installed on the motor bracket 122, so that the through hole 152a and the threaded hole are quickly aligned, facilitating the countersunk screw to be screwed in from the through hole 152a, which is beneficial to improving the assembly efficiency of the product.

[0054] The present utility model also proposes an electric toothbrush 10, which includes an electric toothbrush handle 100. The specific structure of the electric toothbrush handle 100 refers to the above embodiment. Since the electric toothbrush 10 adopts all the technical solutions of the above all embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated one by one here.

[0055] As Figure 2 As shown, in an embodiment of the present utility model, the electric toothbrush 10 further has a brush head 200 and a charging stand 300. The brush head 200 is detachably installed on the transmission shaft 130 of the electric toothbrush handle 100. One end of the electric toothbrush handle 100 away from the brush head 200 is used to be installed on the charging stand 300 for wireless charging. Specifically, a battery 180, a battery bracket 181 for installing the battery 180, and a circuit board 182 are further provided in the electric toothbrush handle 100. A gasket 183 is provided between the battery bracket 181 and the motor bracket 122 for buffering the vibration impact brought by the motor 121. The motor 121 and the circuit board 182 are electrically connected to the battery 180. A bottom cover 190 is provided at one end of the electric toothbrush handle 100 away from the brush head 200. A charging coil holder 192 is installed on the bottom cover 190. The charging stand 300 charges the battery 180 through the charging coil holder 192. In addition, an O-ring 191 is also installed on the bottom cover 190 for sealing the gap between the bottom cover 190 and the housing 110 to prevent water from entering the tail end.

[0056] The above description is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model accordingly. All equivalent structural transformations made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present utility model.

Claims

1. An electric toothbrush handle, characterized in that: include: A shell, one end of which is provided with an opening; A motor assembly is disposed in the housing; A transmission shaft, one end of which is connected to the motor assembly, and the other end of which extends from the opening to the outside of the housing for installation of a brush head; A sealing member is disposed at the opening, the sealing member is sleeved on the transmission shaft and is limitedly installed on the housing to seal the gap between the transmission shaft and the housing; as well as A support member is disposed in the shell, wherein one end of the support member away from the opening is connected to the motor assembly, and one end of the support member close to the opening abuts against the sealing member.

2. The electric toothbrush handle according to claim 1, characterized in that: The support member is in the shape of a cylinder with openings at both ends. The support member is sleeved on the transmission shaft and arranged between the seal member and the motor assembly. The seal member is provided with a notch groove on one side facing the support member, and one end of the support member away from the motor assembly abuts against the groove wall of the notch groove.

3. The electric toothbrush handle according to claim 1, characterized in that: A clamping portion is provided in the shell near the opening and protrudes in a direction away from the brush head. The seal is provided with a limiting portion corresponding to the clamping portion. The limiting portion is connected to the clamping portion so that the seal is limitedly installed on the shell.

4. The electric toothbrush handle according to claim 3, characterized in that: The support member is provided with a support portion at a position close to the clamping portion, the limiting portion is provided between the support portion and the clamping portion, and the support portion and the clamping portion clamp the limiting portion.

5. The electric toothbrush handle according to claim 1, characterized in that: The electric toothbrush handle also includes an elastic member. The sealing member is extended along the length direction of the transmission shaft, and the elastic member is sleeved on the outer side wall of the sealing member.

6. The electric toothbrush handle according to claim 1, characterized in that: A protrusion is provided on the contact surface between the sealing member and the housing, and the protrusion is arranged in an annular shape along the circumference of the sealing member.

7. The electric toothbrush handle according to any one of claims 1 to 6, characterized in that: The motor assembly includes a motor and a motor bracket, the motor is installed in the motor bracket, the motor bracket is fixedly connected to the shell, the end of the transmission shaft away from the brush head passes through the motor bracket to connect to the motor, and the motor is used to drive the transmission shaft to swing along the axial direction.

8. The electric toothbrush handle according to claim 7, characterized in that: The electric toothbrush handle also includes a connecting piece, and a connecting portion is provided at one end of the supporting piece close to the motor bracket. A through hole is penetrated through the connecting portion, and the connecting piece is used to connect to the motor bracket through the through hole so that the supporting piece is fixedly connected to the motor bracket.

9. The electric toothbrush handle according to claim 8, characterized in that: A guide column is also provided on the side of the connecting portion facing the motor bracket. The guide column is spaced apart from the through hole. A guide groove is provided on the motor bracket corresponding to the guide column. The guide column is used to be inserted into the guide groove so that the support member can be limitedly installed on the motor bracket.

10. An electric toothbrush, characterized in that: The invention comprises an electric toothbrush handle as claimed in any one of claims 1 to 9.

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