Vibration reduction motor and electric toothbrush having the same

Abstract

A vibration reduction motor and an electric toothbrush having the same, the vibration reduction motor comprises a housing, an electromagnetic coil, a magnet, an output shaft and a driving structure, the magnets are multiple, and under the control of the electromagnetic coil, the magnets can be arranged in the housing to perform linear reciprocating motion along the axis direction close to the electromagnetic coil and the direction away from the axis direction of the electromagnetic coil, when the magnet moves, the axis of the electromagnetic coil is always at the center of the multiple magnets, the output shaft is rotatably arranged in the housing and is coaxially arranged with the electromagnetic coil, each of the magnets is connected to the output shaft through a driving structure, and the driving structure converts the linear motion of the magnet into the rotational motion of the output shaft. The vibration reduction motor has a good vibration reduction effect and a relatively simple and compact structure.

Description

Technical Field

[0001] The present invention relates to the technical field of motors, and in particular to a damping motor and an electric toothbrush having the same. Background Art

[0002] In handheld small appliances such as electric toothbrushes, motors are an essential component. For example, electric toothbrushes need to be equipped with motors to move the toothbrush head. However, since such small appliances need to be held by hand when in use, the vibration and noise of the motor will significantly affect the user experience of such small appliances.

[0003] In the prior art, in order to reduce the vibration and noise of the motor during operation, elastic parts, mounting plates and other structures are generally provided to play a role in vibration reduction and buffering, and silencer components, sound insulation shells and the like are provided to increase the overall sound absorption and sound insulation effects, thereby enhancing the noise reduction effect. However, on the one hand, the above-mentioned structure is generally directly provided at the connection between the motor and the small household appliance housing, which will cause the conduction of vibration and noise, causing the movement bracket to vibrate as a whole, and the vibration reduction effect is not obvious; on the other hand, since the use scenario of handheld small household appliances requires the body to be as light as possible, the above-mentioned structure will undoubtedly increase the size and weight of the body, causing obstacles to the layout of other components. Summary of the invention

[0004] The invention provides a vibration reduction motor, which has a good vibration reduction effect and a relatively simple and compact structure.

[0005] The present invention provides a vibration reduction motor, including a shell, an electromagnetic coil, a magnet, an output shaft and a driving structure. There are multiple magnets. Under the control of the electromagnetic coil, the magnet can be arranged in the shell for linear reciprocating motion along the axis direction close to the electromagnetic coil and the direction away from the axis direction of the electromagnetic coil. When the magnet moves, the axis of the electromagnetic coil is always at the center of the multiple magnets. The output shaft is rotatably arranged in the shell and coaxially arranged with the electromagnetic coil. Each of the magnets is connected to the output shaft through a driving structure, and the driving structure converts the linear motion of the magnet into the rotational motion of the output shaft.

[0006] Furthermore, the driving structure includes a first connecting rod and a second connecting rod, one end of the first connecting rod is hinged to the magnet, and the other end is hinged to one end of the second connecting rod, and one end of the second connecting rod away from the first connecting rod is fixed to the output shaft.

[0007] Furthermore, the lengths of the first connecting rods on all the driving structures are the same, and the lengths of the second connecting rods are also the same.

[0008] Furthermore, the shell includes a support plate, a slide rail is arranged on the support plate, the magnet is slidably arranged on the slide rail, and an extension line of the slide rail passes through the axis of the electromagnetic coil.

[0009] Furthermore, the shell also includes a cover plate and a bottom plate, the cover plate and the bottom plate are respectively located on both sides of the support plate, a first accommodating space is formed between the cover plate and the support plate, a second accommodating space is formed between the support plate and the bottom plate, the magnet and the output shaft are arranged in the first accommodating space, and the electromagnetic coil is arranged in the second accommodating space.

[0010] Furthermore, a first fixing portion is formed on one side of the support plate located in the first accommodating space, one end of the output shaft is rotatably disposed in the first fixing portion, and the other end extends out of the shell.

[0011] Furthermore, a second fixing portion is formed on one side of the support plate located in the second accommodating space, and the electromagnetic coil is wound on the second fixing portion.

[0012] Furthermore, the magnet and the electromagnetic coil are located on the same plane, and the output shaft passes through the center of the electromagnetic coil.

[0013] Furthermore, the number of the magnets is two, three or four.

[0014] The present invention provides an electric toothbrush, comprising the above-mentioned vibration reduction motor.

[0015] In summary, in the present invention, when the output shaft is driven to rotate by the motor, the magnet is controlled by the electromagnetic coil to make a reciprocating motion along a straight line approaching and away from the electromagnetic coil. The driving structure converts the linear motion into the rotation of the output shaft. Since the movement of the magnet is reciprocating, the output shaft 40 will also present a reciprocating rotation, that is, after rotating in one direction by an angle, it rotates in another direction. In this embodiment, since the rotation of the output shaft is converted from the linear motion of the magnet, and when the magnet moves, the axis of the electromagnetic coil is always at the center of the multiple magnets. When the output shaft rotates in one direction or changes the direction of rotation, the movements of the multiple magnets are opposite, and the impacts generated in the linear motion of the magnets will offset each other, thereby achieving the purpose of reducing vibration. Further, since in the vibration reduction motor, it is by changing the movement mode of the magnet and converting the linear motion of the magnet into the rotation of the output shaft through the driving structure. Therefore, the vibration reduction method in this scheme comes from the inside of the motor, that is, the vibration will not be transmitted to the outside of the vibration reduction motor, and there is no need to add additional vibration reduction springs, vibration reduction pads and other components to the outside of the motor, and its structure is also relatively simple and compact.

[0016] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the following specifically cites a preferred embodiment and describes it in detail with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Shown is a schematic diagram of the shaft side structure of a vibration reduction motor provided in an embodiment of the present invention.

[0018] Figure 2 Shown Figure 1 Schematic diagram of the top view of the vibration reduction motor.

[0019] Figure 3 Shown Figure 2 Schematic diagram of the cross-sectional structure along the III-III direction.

[0020] Figure 4 Shown Figure 1 Schematic diagram of the shaft side structure of the middle shock absorber motor after removing the cover.

[0021] Figure 5 Shown Figure 1 Schematic diagram of the top view of the middle shock absorber motor after removing the cover.

[0022] Figure 6 Shown Figure 1 Schematic diagram of the shaft side structure of the middle shock absorber motor after removing the cover and bottom plate.

[0023] Figure numerals: 10. Shell, 11. Support plate, 111. Slide rail, 112. First fixing portion, 13. Second fixing portion, 12. Cover plate, 13. Bottom plate, 14. First accommodating space, 15. Second accommodating space, 20. Electromagnetic coil, 30. Magnet, 40. Output shaft, 50. Driving structure, 51. First connecting rod, 52. Second connecting rod. DETAILED DESCRIPTION

[0024] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the present invention is described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0025] The invention provides a vibration reduction motor, which has a good vibration reduction effect and a relatively simple and compact structure.

[0026] Figure 1 FIG. 1 is a schematic diagram of the shaft side structure of a vibration reduction motor provided by an embodiment of the present invention. Figure 2 Shown Figure 1 Schematic diagram of the top view of the vibration reduction motor. Figure 3 Shown Figure 2Schematic diagram of the cross-sectional structure along the III-III direction. Figure 4 Shown Figure 1 Schematic diagram of the shaft side structure of the middle shock absorber motor after removing the cover plate. Figure 5 Shown Figure 1 The top view of the structure of the middle shock absorber motor after removing the cover. Figure 6 Shown Figure 1 Schematic diagram of the shaft side structure of the middle damping motor after removing the cover and bottom plate. Figures 1 to 6 As shown, the vibration motor provided by the present invention includes a housing 10, an electromagnetic coil 20, a magnet 30, an output shaft 40 and a driving structure 50. The magnet 30 is multiple, and the magnet 30 can be arranged in the housing 10 to perform linear reciprocating motion along the direction close to the axis of the electromagnetic coil 20 and away from the axis of the electromagnetic coil 20 under the control of the electromagnetic coil 20. When the magnet 30 moves, the axis of the electromagnetic coil 20 is always at the center of the multiple magnets 30. The output shaft 40 is rotatably arranged in the housing 10 and is coaxially arranged with the axis of the electromagnetic coil 20. Each magnet 30 is connected to the output shaft 40 through a driving structure 50, and the driving structure 50 converts the linear motion of the magnet 30 into the rotation of the output shaft 40.

[0027] In this embodiment, when the output shaft 40 is driven to rotate by the motor, the magnet 30 is controlled by the electromagnetic coil 20 to make a reciprocating motion along a straight line approaching and away from the electromagnetic coil 20. The driving structure 50 converts the linear motion into the rotation of the output shaft 40. Since the movement of the magnet 30 is reciprocating, the output shaft 40 will also present a reciprocating rotation, that is, after rotating in one direction by an angle, it rotates in another direction. In this embodiment, since the rotation of the output shaft 40 is converted from the linear motion of the magnet 30, and when the magnet 30 moves, the axis of the electromagnetic coil 20 is always at the center of the multiple magnets 30. When the output shaft 40 rotates in one direction or changes the direction of rotation, the movements of the multiple magnets 30 are opposite, and the impacts generated in the linear motion of the magnet 30 will offset each other, thereby achieving the purpose of reducing vibration. Further, in this vibration reduction motor, it is by changing the movement mode of the magnet 30 and converting the linear motion of the magnet 30 into the rotation of the output shaft 40 through the driving structure. Therefore, the vibration reduction method in this solution comes from the inside of the motor, that is, the vibration will not be transmitted to the outside of the vibration-reducing motor, and there is no need to add additional vibration-reducing springs, vibration-reducing pads and other components to the outside of the motor. The structure is also relatively simple and compact.

[0028] For further information, please refer to Figures 3 to 5 In this embodiment, the housing 10 includes a support plate 11, on which a slide rail 111 is disposed, and the magnet 30 is slidably disposed on the slide rail 111. An extension line of the slide rail 111 passes through the axis of the electromagnetic coil 20.

[0029] The driving structure 50 includes a first connecting rod 51 and a second connecting rod 52, one end of the first connecting rod 51 is hinged to the magnet 30, and the other end is hinged to one end of the second connecting rod 52, and the end of the second connecting rod 52 away from the first connecting rod 51 is fixed to the output shaft 40. That is, during the linear motion of the magnet 30, since both ends of the first connecting rod 51 are hinged, the angle between the first connecting rod 51 and the magnet 30 and the second connecting rod 52 will change. In addition, the second connecting rod 52 is fixed to the output shaft 40, so the linear motion of the magnet 30 will be converted into the rotation of the output shaft 40 through the first connecting rod 51 and the second connecting rod 52.

[0030] Further, in this embodiment, the lengths of the first connecting rods 51 and the second connecting rods 52 on all the driving structures 50 are the same, that is, the distances between the connection points of the first connecting rods 51 and the second connecting rods 52 and the axis of the output shaft 40 are completely equal.

[0031] In this embodiment, there are two magnets 30 and correspondingly there are two second connecting rods 52 . The two second connecting rods 52 can form a whole, and the axis of the output shaft 40 passes through the center of the whole rod body.

[0032] It should be noted that, in other embodiments, the number of magnets 30 is not limited to two, but may be three, four or more, as long as the multiple magnets 30 are located at the vertices of a regular polygon and the axis of the output shaft 40 is located at the center of the regular polygon.

[0033] Furthermore, in this embodiment, the shell 10 also includes a cover plate 12 and a bottom plate 13, and the cover plate 12 and the bottom plate 13 are respectively located on both sides of the support plate 11, a first accommodating space 14 is formed between the cover plate 12 and the support plate 11, and a second accommodating space 15 is formed between the support plate 11 and the bottom plate 13, the above-mentioned magnet 30 and the output shaft 40 are arranged in the first accommodating space 14, and the electromagnetic coil 20 is arranged in the second accommodating space 15.

[0034] Since the handheld small household appliance has a high volume requirement, and in this embodiment, the length occupied by the slide rail 111 is relatively large, the arrangement of the two spaces can facilitate the arrangement of the slide rail 111 and prevent the slide rail 111 from interfering with the arrangement of the electromagnetic coil 20. That is, in this embodiment, along the axial direction of the output shaft 40, the projection of the slide rail 111 to the position of the bottom plate 13 can partially overlap with the electromagnetic coil 20.

[0035] It is understandable that in other embodiments, the slide rail 111 and the electromagnetic coil 20 may not be arranged in layers, but on the same plane. In this case, although the cross-sectional area of ​​the housing 10 along the direction perpendicular to the axis is increased, the height of the vibration reduction motor can be reduced. In this case, the output shaft 40 may pass through the center of the electromagnetic coil 20.

[0036] In this embodiment, a first fixing portion 112 is formed on one side of the support plate 11 located in the first accommodating space 14 , one end of the output shaft 40 is rotatably disposed in the second fixing portion 113 , and the other end extends out of the housing 10 .

[0037] A second fixing portion 113 is formed on one side of the support plate 11 located in the second accommodating space 15 , and the electromagnetic coil 20 is wound on the first fixing portion 112 .

[0038] In summary, in the present invention, when the output shaft 40 is driven to rotate by the motor, the magnet 30 is controlled by the electromagnetic coil 20 to make a reciprocating motion along a straight line approaching and away from the electromagnetic coil 20. The driving structure 50 converts the linear motion into the rotation of the output shaft 40. Since the movement of the magnet 30 is reciprocating, the output shaft 40 will also present a reciprocating rotation, that is, after rotating in one direction by an angle, it rotates in another direction. In this embodiment, since the rotation of the output shaft 40 is converted from the linear motion of the magnet 30, and when the magnet 30 moves, the axis of the electromagnetic coil 20 is always at the center of the multiple magnets 30. When the output shaft 40 rotates in one direction or changes the direction of rotation, the movements of the multiple magnets 30 are opposite, and the impacts generated in the linear motion of the magnet 30 will offset each other, thereby achieving the purpose of reducing vibration. Further, in the vibration reduction motor, the linear motion of the magnet 30 is converted into the rotation of the output shaft 40 by changing the movement mode of the magnet 30 and the driving structure. Therefore, the vibration reduction method in this solution comes from the inside of the motor, that is, the vibration will not be transmitted to the outside of the vibration-reducing motor, and there is no need to add additional vibration-reducing springs, vibration-reducing pads and other components to the outside of the motor. The structure is also relatively simple and compact.

[0039] The present invention also provides an electric toothbrush, comprising the above-mentioned vibration reduction motor. Regarding other technical features of the electric toothbrush, please refer to the prior art and will not be described in detail here.

[0040] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A vibration reduction motor, characterized in that: It includes a shell, an electromagnetic coil, a magnet, an output shaft and a driving structure. There are multiple magnets. Under the control of the electromagnetic coil, the magnet can be arranged in the shell for linear reciprocating motion along the axis direction close to the electromagnetic coil and the direction away from the axis direction of the electromagnetic coil. When the magnet moves, the axis of the electromagnetic coil is always at the center of the multiple magnets. The output shaft is rotatably arranged in the shell and coaxially arranged with the electromagnetic coil. Each of the magnets is connected to the output shaft through a driving structure, and the driving structure converts the linear motion of the magnet into the rotational motion of the output shaft.

2. The vibration reduction motor according to claim 1, characterized in that: The driving structure includes a first connecting rod and a second connecting rod, one end of the first connecting rod is hinged to the magnet, and the other end is hinged to one end of the second connecting rod, and one end of the second connecting rod away from the first connecting rod is fixed to the output shaft.

3. The vibration reduction motor according to claim 2, characterized in that: The lengths of the first connecting rods on all the driving structures are the same, and the lengths of the second connecting rods are also the same.

4. The vibration reduction motor according to claim 1, characterized in that: The housing comprises a support plate, a slide rail is arranged on the support plate, the magnet is slidably arranged on the slide rail, and an extension line of the slide rail passes through the axis of the electromagnetic coil.

5. The vibration reduction motor according to claim 4, characterized in that: The shell also includes a cover plate and a bottom plate, the cover plate and the bottom plate are respectively located on both sides of the support plate, a first accommodating space is formed between the cover plate and the support plate, a second accommodating space is formed between the support plate and the bottom plate, the magnet and the output shaft are arranged in the first accommodating space, and the electromagnetic coil is arranged in the second accommodating space.

6. The vibration reduction motor according to claim 5, characterized in that: A first fixing portion is formed on one side of the support plate located in the first accommodating space, one end of the output shaft is rotatably disposed in the first fixing portion, and the other end extends out of the shell.

7. The vibration reduction motor according to claim 5, characterized in that: A second fixing portion is formed on one side of the support plate located in the second accommodating space, and the electromagnetic coil is wound on the second fixing portion.

8. The vibration reduction motor according to claim 1, characterized in that: The magnet and the electromagnetic coil are located on the same plane, and the output shaft passes through the center of the electromagnetic coil.

9. The vibration reduction motor according to claim 1, characterized in that: The number of the magnets is two, three or four.

10. An electric toothbrush, characterized in that: A vibration reduction motor comprising the vibration reduction motor according to any one of claims 1 to 9.

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