CN215458885U - Motor shaft centering mechanism of electric toothbrush - Google Patents
Motor shaft centering mechanism of electric toothbrush Download PDFInfo
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- CN215458885U CN215458885U CN202121247947.4U CN202121247947U CN215458885U CN 215458885 U CN215458885 U CN 215458885U CN 202121247947 U CN202121247947 U CN 202121247947U CN 215458885 U CN215458885 U CN 215458885U
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- motor shaft
- motor
- electric toothbrush
- connecting piece
- centering mechanism
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Abstract
The utility model discloses a motor shaft centering mechanism of an electric toothbrush, which comprises: the motor is provided with a motor shaft in a protruding mode at one end, a connecting piece sleeved on the motor shaft and an elastic component with a fixed end connected with the motor; the connecting piece is respectively connected with the motor shaft and the movable end of the elastic part, and the motor shaft drives the connecting piece to rotate when rotating and enables the elastic part to store energy; when the motor shaft stops rotating, the elastic component drives the connecting piece and the motor shaft to rebound to the initial position. The utility model aims to provide a mechanism with a motor shaft centering function, which enables a motor shaft of a motor to automatically return to an initial position when the motor shaft does not rotate and improves the rotation stability of the motor shaft.
Description
Technical Field
The utility model belongs to the field of electric toothbrushes, and particularly relates to a motor shaft centering mechanism of an electric toothbrush.
Background
Electric toothbrushes have appeared in the fifties of the last century for the first time, and today, electric toothbrushes on the on-line market are mainly classified into two major categories, one is of a sound wave type and the other is of a rotary type.
However, the acoustic wave type electric toothbrush mainly relies on vibration and micro-swing of the bristles to clean the surfaces of teeth, and more importantly, relies on high-frequency acoustic wave power to drive, so that a large number of micro-bubbles are generated and gathered at the top ends of the bristles, fine vacuum bubbles collapse rapidly, and energy is generated to wash gaps between teeth, thereby cleaning stains and dental plaques in gaps between teeth.
The toothbrush drives the toothbrush head to generate high-frequency vibration by the rapid rotation or vibration of the vibration motor, so that the toothpaste is instantly decomposed into fine foam to deeply clean teeth gaps. Meanwhile, the vibration of the brush hair on the brush head can promote the blood circulation in the oral cavity and has a massage effect on the gum tissue. The sound wave type electric toothbrush adopts a vibrating motor, so that the toothbrush head can generate high-frequency vibration in a direction vertical to the toothbrush handle, but the vibration amplitude is small, and is usually about 5 mm up and down. In the prior art, the sound wave type electric toothbrush using the same motor does not have the function of enabling the motor shaft to return to the right.
SUMMERY OF THE UTILITY MODEL
In view of the above-mentioned drawbacks of the prior art, it is an object of the present invention to provide a mechanism with a motor shaft centering function, which automatically returns the motor shaft of the motor to a starting position when the motor shaft is not rotated, and improves the stability of the rotation of the motor shaft.
This patent scheme provides a mechanism in motor shaft of electric toothbrush returns, includes: the motor is provided with a motor shaft in a protruding mode at one end, a connecting piece sleeved on the motor shaft and an elastic component with a fixed end connected with the motor; the connecting piece is respectively connected with the motor shaft and the movable end of the elastic part, and the motor shaft drives the connecting piece to rotate when rotating and enables the elastic part to store energy; when the motor shaft stops rotating, the elastic component drives the connecting piece and the motor shaft to rebound to the initial position.
Furthermore, the motor shaft protrudes out of the tail end of the motor, and the elastic component is arranged at the tail end of the motor.
Furthermore, the motor shaft protrudes out of the front end of the motor, and the elastic component is arranged at the front end of the motor.
Furthermore, the elastic part is a spring, the spring is sleeved on the connecting piece, the fixed end of the spring is buckled on the motor, and the movable end of the spring is buckled on the connecting piece.
Further, the stiff end of spring weld in on the motor, the expansion end of spring weld in on the connecting piece.
Furthermore, the motor shaft further comprises a clamp spring, and a clamping end of the clamp spring is sleeved on the motor shaft to limit the axial movement of the connecting piece.
Further, the motor shaft structure further comprises a jackscrew, wherein a jackscrew hole is formed in the side face of the connecting piece, and the jackscrew abuts against the motor shaft through the jackscrew hole.
Further, still including set up in the apron of motor one end, the motor shaft runs through the apron middle part.
Specifically, the cover plate is provided with a clamping groove, and the fixed end of the elastic component is clamped in the clamping groove.
Furthermore, a Hall plate for detecting the rotation angle of the motor shaft is arranged at the tail end of the motor.
The improvement of this patent brings the following advantage:
(1) the motor shaft of this application embodiment of an electric toothbrush returns well mechanism, should return well mechanism and electric toothbrush's motor shaft and be connected, adopt elastomeric element energy storage. When the motor of the electric toothbrush rotates, the connecting piece is driven to rotate, and the elastic part stores energy. Then when the motor stops rotating, the elastic part of the energy storage drives the connecting piece and the motor shaft to rebound to the initial position. Therefore, when the electric toothbrush stops rotating, the motor shaft can return to the original state and is always at the preset initial position.
(2) As is well known to those skilled in the art, since one end of the motor shaft is used to mount the brush head of the electric toothbrush, the brush head and the electric shaft need to be properly positioned to achieve the mounting. The motor shaft is always positioned at the preset initial position when the electric toothbrush stops rotating, so that the position of the motor shaft is consistent when the motor shaft is static, and a user can align and pair the motor shaft and the installation part of the brush head more quickly, conveniently and accurately and install the motor shaft and the brush head.
(3) The vibration of the motor shaft of the electric toothbrush is realized through the small-angle high-frequency forward rotation and reverse rotation of the motor shaft, and the force of the motor shaft needs to keep the stability of the motor shaft when the motor shaft rotates forwards and reversely continuously at high frequency, so that the forward and reverse rotation efficiency can be improved.
(4) Finally, most electric toothbrushes have motors that rotate in a manner that the motor shaft rotates in a clockwise direction and a counterclockwise direction alternately (the rotation angles and the rotation speeds in the two directions are substantially the same), and the rotation angle is small (less than 90 degrees). The motor forms small amplitude, high frequency vibrations on the brushhead through this small angle alternating rotation. The current rotation state of the motor shaft needs to be judged before the motor rotates so as to determine the rotation direction. After the centering mechanism is adopted, the motor shaft is always in a preset position, and the step that the current rotating state of the motor shaft needs to be judged before rotation is saved.
Drawings
FIG. 1 is an exploded view of the motor centering mechanism of an electric toothbrush according to an embodiment of the present application;
FIG. 2 is a perspective view of a motor shaft centering mechanism of an electric toothbrush according to an embodiment of the present invention;
wherein, 1 is the motor, 11 is the motor tail end, 12 is the hall board, 2 is the motor shaft, 3 is the apron, 31 is the buckle groove, 4 is the connecting piece, 41 is the jackscrew hole, 5 is elastomeric element, 51 is the elastomeric element stiff end, 52 is the elastomeric element expansion end, 6 is the jackscrew, 7 is the jump ring, 71 is the buckle end of jump ring.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The utility model is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
In order to better understand the technical solution of the present invention for those skilled in the art, the following provides a specific explanation of the inventive idea of the inventor.
The number of people using the electric toothbrush is increasing, but the inventor finds that the electric toothbrush in the prior art lacks a function of enabling the motor to rotate in a centering way, so that the position of the motor shaft when the motor shaft is at rest is not fixed and uniform. Since one end of the motor shaft needs to be provided with a brush head (functional part for brushing teeth, with soft bristles), in order to conveniently and firmly install the brush head, the end of the motor shaft on which the brush head is installed is not generally regular cylindrical (as shown in the shape of the motor shaft at the lower right corner in fig. 1), but is generally flat as shown in fig. 1. This requires the mounting holes of the brush head to be accurately mated with the mounting end of the motor shaft to allow the brush head to be smoothly mounted. The motor shaft is in random different states when in rest due to lack of centering function, which is not favorable for accurate matching of the brush head and the mounting end of the motor shaft. Furthermore, the motor of the electric toothbrush needs to judge the position state of the motor shaft (brush head) before starting so as to determine the rotating direction when starting. The inventors have found that both of these can be solved by a centering function.
As shown in fig. 1 and 2, embodiment 1 of the present application provides a motor centering mechanism of an electric toothbrush, including:
a motor 1 with a motor shaft 2 protruding from one end;
the motor 1 can adopt a vibrating motor, and can enable the brush head to generate high-frequency vibration vertical to the direction of a motor shaft; the motor 1 comprises a motor body and a motor shaft 2, wherein the motor shaft 2 can protrude out of the front end of the motor 1 and also protrude out of the tail end 11 of the motor, and the motor shaft can be selected and set by a person skilled in the art according to actual needs; preferably, the motor shaft 2 protrudes from the tail end 11 of the motor; wherein, as can be understood by those skilled in the art, one end of the electric toothbrush for installing the brush head is the front end of the motor, and the end opposite to the end for installing the brush head is the tail end 11 of the motor;
the connecting piece 4 is sleeved on the motor shaft 2;
the connecting piece 4 may be substantially cylindrical, the connecting piece 4 being hollow, the motor shaft 2 passing through the hollow thereof; optionally, the cross-sectional shape of the hollow part of the connecting piece 4 is non-circular, and accordingly, the cross-sectional shape of a section of the motor shaft 2 opposite to the connecting piece 4 is matched with the cross-sectional shape of the connecting piece 4, so that the motor shaft 2 can drive the connecting piece 4 to rotate;
an elastic component 5 with a fixed end connected with the motor 1;
the fixed end 51 of the elastic component 5 is fixedly connected with the motor 1, and when the motor shaft 2 is static or rotates, the fixed end 51 of the elastic component 5 is fixed; preferably, the fixed end 51 of the elastic component 5 is connected to the tail end 11 of the motor, or the elastic component 5 is arranged at the tail end 11 of the motor; the elastic member 5 may be a spring, or other type of elastic member 5, such as a leaf spring, preferably a spring; the fixed end of the spring is buckled on the motor 1 and fixed, and the movable end of the spring is buckled on the connecting piece 4, of course, the fixed end of the spring can be welded on the motor 1 and fixed, and the movable end of the spring is welded on the connecting piece 4, and only the rigid connection of the elastic part 5, the connecting piece 4 and the motor 1 is needed;
wherein, the connecting piece 4 is respectively connected with the motor shaft 2 and the movable end 52 of the elastic component 5; when the motor shaft 2 rotates, the connecting piece 4 is driven to rotate, and the elastic part 5 is enabled to store energy;
the connecting piece 4 is sleeved on the motor shaft 2 and fixedly connected with the motor shaft 2, preferably detachably and fixedly connected; the connecting piece 4 can rotate along with the rotation of the motor shaft 2; the movable end 52 of the elastic component 5 is also fixedly connected with the connecting piece 4, when the motor shaft 2 rotates, the movable end 52 of the elastic component 5 is pulled to rotate, so that the elastic component 5 generates elastic deformation to store energy;
when the motor shaft 2 stops rotating, the elastic part 5 drives the connecting piece 4 and the motor shaft 2 to rebound to the initial position;
when the motor shaft 2 is stationary, the movable end 52 of the elastic component 5 loses the pulling force, and the elastic deformation plays a leading role to generate a resilience force, so as to drive the connecting piece 4 connected with the elastic component 5 and the motor shaft 2 to rebound to the initial position (the balance position of the elastic component 5).
The working principle of the utility model is as follows: before the motor 1 is started, the elastic component 5 is in a balance position (a preset position), and at this time, even if the motor shaft 2, the brush head and the like are influenced by an external force to rotate (for example, a user stirs the brush head by hands and the like), the motor shaft 2 can be restored to an initial position (namely, the balance position of the elastic component 5) under the resilience action of the elastic component 5; when the motor 1 is started, the motor shaft 2 rotates clockwise and anticlockwise alternately to drive the movable end 52 of the elastic component 5 to be continuously tensioned, loosened, tensioned and then loosened, and as long as the motor shaft 2 deviates from the initial position, the elastic component 5 generates elastic deformation to accumulate elastic potential energy; when the motor 1 is turned off, the elastic force generated by the elastic deformation plays a dominant role, and the movable end 52 of the elastic component 5 pulls the connecting piece 4, and further pulls the motor shaft 2 to rebound to the initial position.
As shown in fig. 1 and 2, in embodiment 2 of the present application, a motor shaft centering mechanism of an electric toothbrush is substantially the same as that in embodiment 1, except that a snap spring 7 is added on the basis of embodiment 1, the shape of the snap spring 7 is similar to a notched "8" shape (as shown in fig. 1), and a fastening end 71 of the snap spring 7 is sleeved on the motor shaft 2 to limit axial movement of a connecting member 4 and prevent the connecting member from loosening; specifically, the connecting piece 4 is sleeved on the motor shaft 2, then the buckle end 71 of the clamp spring 7 is sleeved on the motor shaft 2, and the connecting piece 4 positioned between the clamp spring 7 and the motor body is clamped tightly, so that the connecting piece 4 is prevented from moving in the axial direction of the motor shaft 2, and the bad vibration of the connecting piece 4 is reduced.
As shown in fig. 1, embodiment 3 of the present application is a motor shaft centering mechanism of an electric toothbrush, and this embodiment is substantially the same as embodiment 1, except that a jackscrew 6 is added on the basis of embodiment 1, and the outer side surface of the jackscrew 6 is provided with a thread; the side surface of the connecting piece 4 is provided with a jackscrew hole 41, and the inner wall of the jackscrew hole 41 is provided with threads; the jackscrew 6 is pressed against the motor shaft 2 through the jackscrew hole 41, so that the movement of the connecting piece 4 relative to the motor shaft 2 is further limited, and the connection between the connecting piece 4 and the motor shaft 2 is firmer.
As shown in fig. 1, embodiment 4 of the present application is a motor shaft centering mechanism of an electric toothbrush, and this embodiment is substantially the same as embodiment 1, except that a cover plate 3 is added on the basis of embodiment 1, the cover plate 3 is disposed at one end of the motor 1, and the motor shaft 2 penetrates through the middle of the cover plate 3. Preferably, the cover plate 3 is further provided with a locking groove 31, the locking groove 31 is matched with the fixed end 51 of the elastic member 5, and the fixed end 51 of the elastic member 5 is locked in the locking groove 31.
As shown in fig. 1, the motor shaft centering mechanism of the electric toothbrush of embodiment 5 of the present application is substantially the same as embodiment 1, except that in this embodiment, a hall plate 12 is added on the basis of embodiment 1, the hall plate 12 is disposed at the front end or the rear end of the motor, and a sensor is disposed on the inside of the hall plate 12 for detecting the rotation angle of the motor shaft to assist the clockwise and counterclockwise alternate rotation of the motor shaft.
As shown in fig. 1 and 2, embodiment 6 of the present application provides a motor centering mechanism of an electric toothbrush, including: the motor comprises a motor 1 with a motor shaft 2 protruding from the tail end, a Hall plate 12 arranged on the motor tail end 11, a cover plate 3 arranged on the motor tail end 11 and covering the Hall plate 12, a connecting piece 4 sleeved on the motor shaft 2, a clamp spring 7 with a fixed end sleeved on the motor shaft 2, a jackscrew 6 and a spring with a fixed end connected with the cover plate 3; the motor shaft 2 with the protruding tail end penetrates through the Hall plate 12 and penetrates through the middle of the cover plate 3, a buckling groove 31 is formed in the cover plate 3, the fixed end of the spring is buckled in the buckling groove 31, and the movable end of the spring is buckled and connected with the connecting piece 4; a jackscrew hole 41 is formed in the side face of the connecting piece 4, one end of the jackscrew 6 is abutted against the motor shaft 2 through the jackscrew hole 41, and the movable end 72 of the snap spring 7 is connected with the connecting piece 4; when the motor shaft 2 rotates, the connecting piece 4 is driven to rotate, and the spring is elastically deformed to store energy; when the motor shaft 2 stops rotating, the spring releases elastic potential energy to drive the connecting piece 4 and the motor shaft 2 to rebound to the initial position.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. A motor shaft centering mechanism of an electric toothbrush is characterized by comprising: the motor is provided with a motor shaft in a protruding mode at one end, a connecting piece sleeved on the motor shaft and an elastic component with a fixed end connected with the motor; the connecting piece is respectively connected with the motor shaft and the movable end of the elastic part, and the motor shaft drives the connecting piece to rotate when rotating and enables the elastic part to store energy; when the motor shaft stops rotating, the elastic component drives the connecting piece and the motor shaft to rebound to the initial position.
2. The motor shaft centering mechanism of an electric toothbrush according to claim 1, wherein the motor shaft protrudes from a rear end of the motor, and the elastic member is disposed at the rear end of the motor.
3. The motor shaft centering mechanism of an electric toothbrush according to claim 1, wherein the motor shaft protrudes from a front end of the motor, and the elastic member is disposed at the front end of the motor.
4. The motor shaft centering mechanism of the electric toothbrush according to claim 1, wherein the elastic member is a spring, the spring is sleeved on the connecting member, a fixed end of the spring is fastened to the motor, and a movable end of the spring is fastened to the connecting member.
5. The motor centering mechanism of an electric toothbrush according to claim 4, wherein the fixed end of the spring is welded to the motor, and the movable end of the spring is welded to the connecting member.
6. The motor shaft centering mechanism of an electric toothbrush according to claim 1, further comprising a snap spring and a snap end of the snap spring, wherein the snap end of the snap spring is sleeved on the motor shaft to limit the axial movement of the connecting member.
7. The motor shaft centering mechanism of an electric toothbrush according to claim 1, further comprising a top thread, wherein a top thread hole is formed in a side surface of the connecting member, and the top thread abuts against the motor shaft through the top thread hole.
8. The motor shaft centering mechanism of an electric toothbrush according to claim 1, further comprising a cover plate disposed at one end of the motor, wherein the motor shaft penetrates through a middle portion of the cover plate.
9. The motor shaft centering mechanism of an electric toothbrush according to claim 8, wherein the cover plate is provided with a locking groove, the elastic member has a fixed end, and the fixed end of the elastic member is locked in the locking groove.
10. The motor shaft centering mechanism of an electric toothbrush according to claim 1, wherein a hall plate for detecting a rotation angle of the motor shaft is provided at a rear end of the motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121247947.4U CN215458885U (en) | 2021-06-04 | 2021-06-04 | Motor shaft centering mechanism of electric toothbrush |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121247947.4U CN215458885U (en) | 2021-06-04 | 2021-06-04 | Motor shaft centering mechanism of electric toothbrush |
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| Publication Number | Publication Date |
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| CN215458885U true CN215458885U (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121247947.4U Active CN215458885U (en) | 2021-06-04 | 2021-06-04 | Motor shaft centering mechanism of electric toothbrush |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023245734A1 (en) * | 2022-06-24 | 2023-12-28 | 深圳市一晤未来科技有限公司 | Composite-motion electric motor having elastic bearing pedestal, and electric toothbrush |
| WO2023245735A1 (en) * | 2022-06-24 | 2023-12-28 | 深圳市一晤未来科技有限公司 | Composite motion electric motor having ball bushing, and electric toothbrush |
-
2021
- 2021-06-04 CN CN202121247947.4U patent/CN215458885U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023245734A1 (en) * | 2022-06-24 | 2023-12-28 | 深圳市一晤未来科技有限公司 | Composite-motion electric motor having elastic bearing pedestal, and electric toothbrush |
| WO2023245735A1 (en) * | 2022-06-24 | 2023-12-28 | 深圳市一晤未来科技有限公司 | Composite motion electric motor having ball bushing, and electric toothbrush |
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