CN210780365U

CN210780365U - Motor shock-absorbing structure and electric toothbrush

Info

Publication number: CN210780365U
Application number: CN201921665966.1U
Authority: CN
Inventors: 包昊靖
Original assignee: Dongyang Changrong Technology Co ltd
Current assignee: Dongyang Changrong Technology Co ltd
Priority date: 2019-09-30
Filing date: 2019-09-30
Publication date: 2020-06-16
Anticipated expiration: 2029-09-30

Abstract

The application discloses motor shock-absorbing structure and electric toothbrush relates to the technical field of motors to solve the great technical problem of vibration that the casing among the prior art produced along with the motor natural vibration. The motor damping structure comprises a shell, a motor and a buffering structure, wherein the shell is provided with an internal cavity; the motor is arranged in the inner cavity; the buffer structure is arranged in the inner cavity and is positioned between the motor and the shell for buffering vibration. Therefore, the vibration of the shell generated along with the self vibration of the motor is small, the noise is low, and the work is stable.

Description

Motor shock-absorbing structure and electric toothbrush

Technical Field

The application relates to the technical field of motors, in particular to a motor damping structure and an electric toothbrush.

Background

In the prior art, the electric toothbrush is a widely applied tooth cleaning tool and comprises a motor, a brush head rod and a shell, wherein the brush head on the brush head rod generates high-frequency vibration or rotation through the quick rotation or vibration of a motor core, so that toothpaste is instantaneously decomposed into fine foams to deeply clean slits between teeth, and meanwhile, the vibration of bristles can promote the blood circulation of an oral cavity and has a massage effect on gum tissues.

However, in the electric toothbrush in the prior art, the motor is arranged in the shell, and the shell is easy to vibrate along with the self vibration of the motor due to the vibration of the motor, so that a user can feel 'numb hands' when holding the electric toothbrush, and the electric toothbrush is not easy to hold.

SUMMERY OF THE UTILITY MODEL

An object of this application is to provide a motor shock-absorbing structure to the casing that solves among the prior art produces the great technical problem of vibration along with the motor natural vibration.

The utility model aims to provide an electric toothbrush to solve the casing among the prior art and produce the great technical problem of vibration along with the motor is from shaking.

The above technical problem of the present application is mainly solved by the following technical solutions:

a motor damping structure comprises a shell, a motor and a buffering structure, wherein the shell is provided with an internal cavity; the motor is arranged in the inner cavity; the buffer structure is arranged in the inner cavity and is positioned between the motor and the shell for buffering vibration.

In one embodiment, the buffer structure includes a first cylinder and a second cylinder, and the first cylinder is sleeved outside the motor; the second cylinder body is sleeved outside the first cylinder body and is connected with the shell; wherein a gap is arranged between the outer wall of the first cylinder and the inner wall of the second cylinder.

In an embodiment, the second cylinder has a second inner hole, the second inner hole is a circular truncated cone-shaped hole, one end of a hole wall of the second inner hole abuts against an outer wall of the first cylinder, and the other end of the hole wall is in a suspended state.

In an embodiment, the internal cavity includes a first cavity and a second cavity, an inner diameter of the first cavity is smaller than an inner diameter of the second cavity, an end of the first cylinder is clamped in the first cavity, and an end of the first cylinder is in a suspended state.

In one embodiment, the aperture of the second inner hole increases from top to bottom.

In one embodiment, a first elastic piece is connected to the bottom end of the first cylinder, and a first protruding block protruding outwards is arranged on the first elastic piece.

In an embodiment, the motor damping structure includes a bracket and a circuit board, the bracket is disposed in the internal cavity and connected to the housing, and the second cylinder is connected to the housing through the bracket. The circuit board is arranged on the bracket.

In an embodiment, the buffering structure includes a first buffering member interposed between the first cylinder and the housing.

In one embodiment, a first flange and a second flange are convexly arranged on the outer wall of the first cylinder, and a first groove is formed between the adjacent first flange and the second flange; the first flange can abut against the first buffer piece, and the second flange can abut against the second cylinder; the buffer structure comprises a second buffer piece, and the second buffer piece is arranged in the first groove.

In an embodiment, the buffer structure includes a third buffer member, and the third buffer member is sleeved outside the first cylinder and clamped between the second flange and the second cylinder.

An electric toothbrush comprises a motor damping structure and a transmission rod, wherein the motor damping structure is the motor damping structure; and one end of the transmission rod is in transmission connection with the motor.

In one embodiment, the electric toothbrush includes a brushhead stem, which is connected to the drive link.

In one embodiment, the transmission rod comprises a first rod segment and a second rod segment, and the first rod segment is in a flat head shape; the bottom end of the brush head rod is provided with a connecting hole into which the transmission rod is inserted, the connecting hole is a stepped hole and comprises a first hole section, a second hole section and a third hole section; when the transmission rod is inserted into the connecting hole, the second hole section can be matched with the first rod section.

In one embodiment, a third groove is formed on the second rod section; and a third elastic sheet is connected to the inner wall of the connecting hole, and a third bump matched with the third groove is arranged on the third elastic sheet. When the transmission rod is inserted into the connecting hole, the third projection on the third elastic sheet is inserted into the third groove to form a buckle for fixing.

Compared with the prior art, the beneficial effect of this application is: the motor is arranged on the shell through the buffer structure, and the vibration of the motor is buffered through the buffer structure, so that the shell generates less vibration along with the self vibration of the motor, the noise is lower, and the electric toothbrush works stably.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

Fig. 1 is a schematic structural diagram of a shock-absorbing structure of a motor according to an embodiment of the present application;

FIG. 2 is a schematic view of a powered toothbrush according to one embodiment of the present application;

FIG. 3 is a schematic structural diagram of a housing according to an embodiment of the present application;

FIG. 4 is a schematic view of a portion of an electric toothbrush according to one embodiment of the present application;

FIG. 5 is an exploded view of the powered toothbrush shown in one embodiment of the present application;

FIG. 6 is an exploded view of a portion of the electric toothbrush shown in one embodiment of the present application;

FIG. 7 is a schematic view of a portion of an electric toothbrush according to one embodiment of the present application;

FIG. 8 is a schematic view of the drive rod and the first barrel shown in an embodiment of the present application;

FIG. 9 is a cross-sectional view of a brush head stem and housing shown in one embodiment of the present application.

Icon: 100-an electric toothbrush; 200-a motor damping structure; 1-a brush head rod; 11-a connection hole; 111-a first bore section; 112-a second bore section; 113-a third pore section; 114-a third elastic sheet; 115-third bump; 12-bristles; 2-a shell; 21-an internal cavity; 211-a first cavity; 212-a second cavity; 21 a-a first step surface; 21 b-a second step surface; 22-an outlet; 23-a first housing; 231-a fourth groove; 24-a cap; 241-a charging structure; 25-a push button switch; 3-a buffer structure; 31-a first cylinder; 311-a first elastic sheet; 312 — a first bump; 313-a first flange; 314-a second flange; 315-a first groove; 316-a first bore; 32-a second cylinder; 321-a second elastic sheet; 322-second bump; 323-fourth bump; 324-a second bore; 33-voids; 34-a first buffer; 35-a second buffer; 36-a third buffer; 4-a motor; 5-a transmission rod; 51-a first pole segment; 51 a-chamfer face; 52-a second pole segment; 52 a-section; 521-a third groove; 6-a scaffold; 61-a second groove; 62-a first clasp; 63-a second clasp; 7-circuit board.

Detailed Description

The terms "first," "second," "third," and the like are used for descriptive purposes only and not for purposes of indicating or implying relative importance, and do not denote any order or order.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present application, it should be noted that the terms "inside", "outside", "left", "right", "upper", "lower", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally arranged when products of the application are used, and are used only for convenience in describing the application and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the application.

In the description of the present application, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements.

The technical solution of the present application will be clearly and completely described below with reference to the accompanying drawings.

Please refer to fig. 1, which is a schematic structural diagram of a motor damping structure 200 according to an embodiment of the present application. The motor damping structure 200 comprises a shell 2, a buffer structure 3 and a motor 4, wherein the shell 2 is provided with an internal cavity 21, and the motor 4 is arranged in the internal cavity 21; the buffer structure 3 is disposed in the internal cavity 21 and located between the motor 4 and the housing 2 for buffering vibration.

The motor 4 may be a rotary motor or a vibration motor. In one embodiment, the motor 4 is a coreless motor for generating a vibratory output.

On motor 4 located casing 2 through buffer structure 3 in this application, through the vibration of buffer structure 3 buffer motor 4 from the area for casing 2 produces the vibration less along with motor 4.

Please refer to fig. 2, which is a schematic structural diagram of an electric toothbrush 100 according to an embodiment of the present application. The electric toothbrush 100 includes a head bar 1 and a housing 2, including the head bar 1, a motor damping structure 200, and a transmission bar 5 (see fig. 4); the bottom end of the transmission rod 5 is in transmission connection with a motor 4 (please refer to fig. 1) in the motor damping structure 200, and the top end is in transmission connection with the brush head rod 1. The shell 2 is arranged below the brush head rod 1, the top end of the brush head rod 1 is connected with brush bristles 12, and the shell 2 is provided with a button switch 25. The electric toothbrush 100 may be a sonic toothbrush, i.e., a sonic vibration toothbrush, in which the vibration frequency of the bristles 12 or the head stem 1 is identical or close to the sonic frequency.

The direction in which the brush head shaft 1 is directed toward the housing 2 is defined as the direction from the top to the bottom, and the end of an article located above is referred to as the top end, and the end located below is referred to as the bottom end.

Please refer to fig. 3, which is a schematic structural diagram of the housing 2 according to an embodiment of the present application. An outlet 22 communicated with the internal cavity 21 is formed at the top end of the shell 2, and the outlet 22 on the shell 2 can be a cylindrical through hole. The outlet 22 is used for the transmission rod 5 (see fig. 4) to pass through.

Referring to fig. 4, a partial structure of the electric toothbrush 100 according to an embodiment of the present application is shown. The motor damping structure 200 includes a bracket 6, the bracket 6 is disposed in the inner cavity 21 and detachably connected to the housing 2, and the buffering structure 3 (see fig. 1) includes a first cylinder 31 and a second cylinder 32. The first cylinder 31 and the second cylinder 32 are both tubular structures with openings at two ends, the outer wall of the first cylinder 31 can be cylindrical, the outer wall of the second cylinder 32 can be cylindrical or truncated cone-shaped, the second cylinder 32 has a second inner hole 324, and the first cylinder 31 has a first inner hole 316.

The first cylinder 31 is sleeved outside the motor 4; the transmission rod 5 passes through the outlet 22 (see fig. 3) and the first inner hole 316 of the first cylinder 31 to be in transmission connection with the motor 4; the second cylinder 32 is sleeved outside the first cylinder 31, and the second cylinder 32 is detachably connected with the housing 2 through the bracket 6. Wherein, a gap 33 is arranged between the outer wall of the first cylinder 31 and the inner wall of the second cylinder 32. The cross section of the gap 33 in the radial direction of the first cylinder 31 is circular.

The second inner hole 324 may have a truncated cone shape, and the diameter of the second inner hole 324 increases from top to bottom. The size of the gap 33 becomes larger in the up-down order. The top end of the hole wall of the second inner hole 324 abuts against the outer wall of the first cylinder 31, and the bottom end is in a suspended state. The top end of the outer wall of the second cylinder 32 abuts against the inner wall of the housing 2, and the bottom end is detachably connected with the housing 2 through the bracket 6. The first cylinder 31 has a top end portion engaged with the housing 2 and a bottom end portion suspended.

The top end of the second cylinder 32 needs to be sleeved with the first cylinder 31, i.e. the minimum aperture of the second inner hole 324 is adapted to the outer diameter of the first cylinder 31.

The first inner hole 316 can be a stepped hole with a diameter corresponding to the outer diameter of the motor 4 and the outer diameter of the end of the transmission rod 5, wherein the outer diameter of the end of the transmission rod 5 is smaller than the outer diameter of the motor 4.

In an operation process, the electric toothbrush 100 drives the transmission rod 5 to vibrate through the motor 4, and the transmission rod 5 drives the brush head rod 1 to vibrate, so that the bristles 12 vibrate. Simultaneously when motor 4 starts up, when producing the vibration of taking certainly, first barrel 31 vibrates along with motor 4 self-oscillation production, and first barrel 31 vibrates in the hole of second barrel 32, and when the amplitude of motor 4 self-oscillation and the amplitude of first barrel 31 were all less than the size in space 33, second barrel 32 can not vibrate or receive the influence less along with first barrel 31 together, reaches the effect of keeping apart motor 4 and casing 2.

When the amplitude of the self-vibration of the motor 4 and the amplitude of the first cylinder 31 are slightly larger than the size of the gap 33, when the amplitude of the self-vibration of the motor 4 does not reach the maximum value and is smaller than the size of the gap 33, the first cylinder 31 can still vibrate within the range of the gap 33, and within the range of the gap 33, the second cylinder 32 cannot vibrate together with the first cylinder 31 or is slightly influenced, so that the effect of isolating the motor 4 from the shell 2 is achieved; outside the range of the gap 33, the first cylinder 31 may collide with the inner wall of the second cylinder 32, so that the second cylinder 32 may vibrate along with the self-vibration of the motor 4, and in sum, the buffer structure 3 may absorb the vibration carried by the motor 4 in a part of the range.

Therefore, the present application can absorb or reduce the vibration and partial noise of the motor 4 through the gap 33, so that the vibration of the housing 2 generated along with the motor 4 is small.

In one embodiment, the amplitude of the motor 4 and the amplitude of the first cylinder 31 are both smaller than the maximum value of the gap 33.

Referring to fig. 4, a plurality of first elastic pieces 311 are connected to the bottom end of the first cylinder 31, the first elastic pieces 311 are distributed in a circumferential array, and the plurality of first elastic pieces 311 are arranged at intervals. A first protrusion 312 protruding outward is disposed on the first elastic piece 311. Wherein, the outward protrusion is convex toward the inner wall of the second cylinder 32. The first elastic piece 311 may be made of plastic or the like having elasticity.

In an operation process, when the motor 4 is turned on and generates self-vibration, the first cylinder 31 vibrates along with the motor 4 and collides with the inner wall of the second cylinder 32, the first protrusion 312 first collides with the inner wall of the second cylinder 32, so that the first elastic sheet 311 generates a certain deformation, and when the first cylinder 31 returns to the original position, the first elastic sheet 311 also returns to the original position. Therefore, the present invention can absorb part or all of the vibration generated by the collision between the first cylinder 31 and the second cylinder 32 by the deformation of the first elastic piece 311.

Referring to fig. 5, an exploded view of the powered toothbrush 100 according to one embodiment of the present application is shown. The bottom end of the second cylinder 32 is connected with a second elastic piece 321, and the second elastic piece 321 is provided with a second protrusion 322 protruding inwards. The outer side wall of the bracket 6 is provided with a second groove 61 matched with the second projection 322.

The second elastic pieces 321 are provided in two to be disposed oppositely. The cross section of the second elastic piece 321 in the thickness direction may be "7", the cross section of the two second elastic pieces 321 in the thickness direction may be "Jiong", and the distance between the bottom ends of the two second elastic pieces 321 is greater than the outer diameter of the second cylinder 32.

The bracket 6 is connected with the second cylinder 32 by the second elastic sheet 321 and the second groove 61 in a snap-fit manner. The second elastic piece 321 may be made of plastic or the like having elasticity.

The housing 2 includes a first housing 23 and a cap 24 connected to each other, and the first housing 23 and the cap 24 are detachably connected by a snap connection, an insertion connection, or a screw connection.

The bottom end of the bracket 6 is provided with a first clasp 62, and the first housing 23 is provided with a fourth groove 231 matched with the first clasp 62. The bracket 6 is snap-connected to the first housing 23 by the first clasp 62 and the fourth groove 231. The first hooks 62 are two and located on two opposite sides of the bracket 6, and the fourth groove 231 may be a through hole.

The electric toothbrush 100 includes a circuit board 7 and a power source, the circuit board 7 being disposed in the internal cavity 21, the circuit board 7 being mounted on the bracket 6 and disposed toward the button switch 25. The circuit board 7 is electrically connected with the motor 4 for controlling the motor 4. The power supply is electrically connected with the circuit board 7 and used for supplying power, and the power supply can be a battery arranged on the battery or an external power supply. The button switch 25 is electrically connected to the circuit board 7. Four second hooks 63 for fixing the circuit board 7 are provided on one side of the bracket 6. The side of the support 6 on which the second hook 63 is located meets the side of the support 6 on which the first hook 62 is located.

A fourth protrusion 323 is disposed at the bottom end of the second cylinder 32, and the fourth protrusion 323 is located between the two opposite second elastic pieces 321. When the second protrusion 322 is sunk into the second groove 61, the fourth protrusion 323 may be sandwiched between the two second hooks 63, so as to limit the movement of the second cylinder 32 relative to the bracket 6.

In one embodiment, a charging structure 241 electrically connected to the power source or the circuit board 7 is disposed in the cap 24.

This application is located circuit board 7 on support 6, and motor 4 links to each other with support 6 through buffer structure 3, and then buffer structure 3 can cushion motor 4 and conduct the vibration for circuit board 7, prevents that circuit board 7 from damaging under high-frequency vibration, has avoided the wearing and tearing because of the vibration appearance.

Referring to fig. 6, an exploded view of a portion of the electric toothbrush 100 according to an embodiment of the present application is shown. The buffering structure 3 (refer to fig. 1) includes a first buffering member 34, a second buffering member 35, and a third buffering member 36, and the first buffering member 34, the second buffering member 35, and the third buffering member 36 may be annular sealing rings made of elastic materials such as rubber, and used for sealing and damping vibration.

A first flange 313 and a second flange 314 are protruded on the outer wall of the first cylinder 31, and a first groove 315 is formed between the adjacent first flange 313 and second flange 314. The first flange 313 is located above the second flange 314, the first flange 313 is located at one end of the first cylinder 31 close to the transmission rod 5 and can abut against the first cushion 34 and the second cushion 35, and the second flange 314 is located at one end of the first cylinder 31 close to the first elastic sheet 311 and can abut against the second cushion 35, the third cushion 36 and the second cylinder 32.

Referring to fig. 7, a partial structure of the electric toothbrush 100 according to an embodiment of the present application is shown. The first buffer member 34 is sleeved outside the transmission rod 5 and is sandwiched between the first cylinder 31 and the housing 2. The second dampener 35 is disposed within the first recess 315. The third buffer 36 is disposed outside the first cylinder 31 and sandwiched between the second flange 314 and the second cylinder 32.

In an operation process, the motor 4 transmits vibration to the brush bristles 12 of the brush head rod 1 through the transmission rod 5 by using the lever principle of the seesaw. Establish second bolster 35 as the fulcrum of 100 vibrating structures of electric toothbrush, motor 4 locates in casing 2 in this application, and motor 4 is less than brush hair 12 to the distance of fulcrum, when motor 4 vibrates and produces the angular deflection, conduct brush hair 12 through the fulcrum is reverse with the vibration, thereby produce bigger polarization distance, thereby can strengthen the vibration range, and this application motor 4 locates casing 2, can be so that 1 external diameter of brush head pole is less, make this application compact structure, save space, and convenient to carry, and it is great to make the anti bending deformation ability of brush head pole 1, and is solid durable.

Please refer to fig. 8, which is a schematic structural diagram of the transmission rod 5 and the first cylinder 31 according to an embodiment of the present application. The transmission rod 5 comprises a first rod segment 51 and a second rod segment 52, the first rod segment 51 being of a flattened head shape. The first pole segment 51 is in the shape of a flat head, i.e., the cross section of the first pole segment 51 in the thickness direction is a rounded rectangle or a rectangle. Or the first pole segment 51 may be comprised of two opposing flat surfaces and two opposing curved surfaces in the shape of a circular arc.

The second pole segment 52 is cylindrical and the second pole segment 52 has an outer diameter that is greater than the thickness of the first pole segment 51.

A third groove 521 is formed on the second rod section 52; the third groove 521 may be an annular groove surrounding the end of the second rod for one circle, and the radial cross section of the third groove 521 may be triangular or semicircular.

The second segment 52 is provided with a cut surface 52a at the junction with the first segment 51, and the first segment 51 is provided with a rounded corner surface 51a at the tip.

Refer to fig. 9, which is a sectional view of the brush head shaft 1 and the housing 2 according to an embodiment of the present application. The bottom surface of the brush head rod 1 is provided with a connecting hole 11 for inserting the transmission rod 5, the connecting hole 11 is a step hole, and the connecting hole 11 comprises a first hole section 111, a second hole section 112 and a third hole section 113 which are sequentially connected. The first hole section 111 is a conical hole or a circular truncated cone-shaped hole, the second hole section 112 is a flat head-shaped hole, and the third hole section 113 is a circular truncated cone-shaped hole. In one embodiment, the diameter of the connecting hole 11 decreases from top to bottom.

The inner wall of the connecting hole 11 is connected with a third elastic sheet 114, and the third elastic sheet 114 is provided with a third bump 115 matched with the third groove 521. The third elastic pieces 114 are disposed in two and are disposed oppositely, or the third elastic pieces 114 are disposed in more than three and are distributed in a circumferential array. Wherein, the third elastic piece 114 is connected at the joint between the second hole section 112 and the third hole section 113, and the length direction of the third elastic piece 114 is arranged in the same direction with the axial direction of the connecting hole 11.

When the transmission rod 5 is inserted into the connection hole 11, the second hole section 112 can match with the first rod section 51, and the third protrusion 115 on the third elastic piece 114 is inserted into the third groove 521 to form a snap-fit.

In the housing 2, the outlet 22 and the inner cavity 21 form a first step surface 21a, and the first cushion member 34 (see fig. 7) is interposed between the first step surface 21a and the first flange 313 (see fig. 7).

The internal cavity 21 includes a first cavity 211 and a second cavity 212, an inner diameter of the first cavity 211 is smaller than an inner diameter of the second cavity 212, a top end of the first barrel 31 (please refer to fig. 7) is clamped in the first cavity 211, and a bottom end thereof is in a suspended state. The first cavity 211 and the second cavity 212 form a second step surface 21b, and the second cavity 212 can abut against the second cylinder 32 (see fig. 7) to limit the up-and-down movement of the second cylinder 32.

The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A motor damping structure, comprising:

a housing having an internal cavity;

a motor disposed within the internal cavity; and

and the buffer structure is arranged in the inner cavity and is positioned between the motor and the shell for buffering vibration.

2. The motor shock absorbing structure according to claim 1, wherein the buffer structure comprises:

the first cylinder is sleeved outside the motor;

the second cylinder is sleeved outside the first cylinder and connected with the shell;

wherein a gap is arranged between the outer wall of the first cylinder and the inner wall of the second cylinder.

3. The motor vibration absorbing structure according to claim 2,

the second cylinder is provided with a second inner hole which is a circular truncated cone-shaped hole, one end of the hole wall of the second inner hole is abutted against the outer wall of the first cylinder, and the other end of the hole wall of the second inner hole is in a suspended state;

the inner cavity comprises a first cavity and a second cavity, the inner diameter of the first cavity is smaller than that of the second cavity, one end part of the first barrel is clamped in the first cavity, and one end part of the first barrel is in a suspended state.

4. The motor vibration absorbing structure according to claim 3,

the bottom end of the first cylinder is connected with a first elastic sheet, and a first convex block protruding outwards is arranged on the first elastic sheet.

5. The motor damping structure according to claim 2, comprising:

the bracket is arranged in the inner cavity and connected with the shell, and the second cylinder is connected with the shell through the bracket; and

the circuit board is arranged on the bracket.

6. The motor damping structure according to any one of claims 2 to 5, wherein the damping structure comprises: the first buffer piece is clamped between the first cylinder and the shell.

7. The motor shock absorption structure according to claim 6, wherein a first flange and a second flange are convexly arranged on the outer wall of the first cylinder, and a first groove is formed between the adjacent first flange and the second flange;

the first flange can abut against the first buffer piece, and the second flange can abut against the second cylinder;

the buffer structure includes: a second buffer disposed in the first recess.

8. The motor shock absorbing structure according to claim 7, wherein the buffer structure comprises: and the third buffer piece is sleeved outside the first barrel body and clamped between the second flange and the second barrel body.

9. An electric toothbrush, comprising:

a motor damping structure according to any one of claims 1 to 8; and

and one end of the transmission rod is in transmission connection with the motor.

10. The electric toothbrush of claim 9, comprising a brushhead stem, the brushhead stem being connected to the drive link;

the transmission rod comprises a first rod section and a second rod section, the first rod section is in a flat head shape, and a third groove is formed in the second rod section;

the bottom end of the brush head rod is provided with a connecting hole for inserting the transmission rod, and the connecting hole comprises a first hole section, a second hole section and a third hole section; a third elastic sheet is connected to the inner wall of the connecting hole, and a third bump matched with the third groove is arranged on the third elastic sheet;

when the transmission rod is inserted into the connecting hole, the second hole section can be matched with the first rod section, and the third projection on the third elastic sheet is inserted into the third groove to form buckling fixation.