Vibration device

Abstract

The utility model discloses a vibration device, which comprises a vibrator assembly and a stator assembly, the vibrator assembly vibrates along a third direction, the vibrator assembly comprises first magnetic parts which are respectively positioned on two sides of the stator assembly along a second direction, and the second direction is perpendicular to the third direction. The vibrator assembly further comprises second magnetic parts located on the two sides of the stator assembly in the third direction respectively, the first magnetic parts and the second magnetic parts form a magnetic loop penetrating through the coil, each second magnetic part comprises a second magnet, and each second magnet is of an integrated structure and is provided with two magnetic areas distributed in the second direction. The magnetizing directions of the two magnetic areas are opposite and are parallel to the second direction; the second magnetic part plays a role in guiding and enhancing magnetic induction lines, magnetic leakage can be effectively reduced, the utilization rate of a magnetic field is improved, and the product driving force is improved; the device has the advantages of high magnetic field effective utilization rate, low magnetic leakage and fast response.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic products, in particular to a vibration device. Background Art

[0002] With the gradual development of electronic product technology, vibration excitation devices have become common functional components in electronic products such as mobile phones and tablet computers. Existing micro vibration excitation devices usually include a vibrator assembly and a stator assembly. The vibrator assembly is composed of a mass block, a magnet, and a shrapnel. The stator assembly is composed of an FPCB, damping, a limiting block, an iron core, and a coil. In order to enable the vibrator assembly to vibrate reciprocally, an electromagnetic interaction needs to be generated between the coil and the magnet. By changing the current in the coil, the magnetic field changes, causing the vibrator assembly to move.

[0003] As an actuator for tactile feedback, the linear motor has been widely used in the field of tactile vibration. In the prior art, the magnetic circuit magnetic field of the iron core structure of the stator assembly has low effective utilization rate, small driving force, and problems such as large magnetic leakage. Summary of the Utility Model

[0004] One technical problem to be solved by the utility model is to provide a vibration device.

[0005] To solve the above technical problem, the technical solution of the utility model is: a vibration device, including a vibrator assembly and a stator assembly. The vibrator assembly vibrates along the third direction. The stator assembly includes an iron core and a coil wound around the iron core. The axial direction of the iron core is parallel to the third direction. The vibrator assembly includes first magnetic parts located on both sides of the stator assembly along the second direction, where the second direction is perpendicular to the third direction. The vibrator assembly further includes second magnetic parts located on both sides of the stator assembly along the third direction. The first magnetic parts and the second magnetic parts form a magnetic circuit passing through the coil;

[0006] The second magnetic part includes a second magnet, which is an integral structure and has two magnetic regions distributed along the second direction. The magnetization directions of the two magnetic regions are opposite and both parallel to the second direction.

[0007] Optionally, the first magnetic part includes a first magnet, the magnetization direction of the first magnet is parallel to the second direction, and the magnetization direction of the first magnet is opposite to the magnetization direction of the corresponding magnetic region of the nearest second magnet; the magnetization directions of the first magnets located on both sides of the stator assembly are opposite.

[0008] Optionally, the first magnetic part further includes a magnetic conduction plate, and the first magnet is fixedly installed on the side of the magnetic conduction plate close to the stator assembly.

[0009] Optionally, the oscillator assembly further includes a mass block, which has an oscillator cavity penetrating along a first direction. The stator assembly is located within the oscillator cavity. The two first magnetic parts and the two second magnetic parts are spaced apart and distributed around the stator assembly, and the first magnetic part and the second magnetic part are connected to the inner wall of the oscillator cavity; the first direction is perpendicular to both the second direction and the third direction.

[0010] Optionally, along the third direction, a bump connected to the mass block is provided between the two ends of the first magnet and the second magnetic part.

[0011] Optionally, the height of the bump along the first direction is the same as that of the first magnet, and the width of the bump along the second direction is the same as that of the first magnetic part.

[0012] Optionally, the bump and the mass block are of an integral structure.

[0013] Optionally, the first magnetic part includes an intermediate magnet, with a side magnet provided on each side of the intermediate magnet. The magnetization direction of the intermediate magnet is parallel to the second direction, and the magnetization direction of the intermediate magnet is opposite to the magnetization direction of the corresponding magnetic region of the nearest second magnet. The magnetization directions of the two side magnets are parallel to the third direction and are opposite to each other. The magnetic poles of the side magnets on the side close to the intermediate magnet have the same polarity as the magnetic poles of the intermediate magnet facing the stator assembly side.

[0014] Optionally, the first magnetic part further includes a magnetic conduction plate, and the intermediate magnet and the two side magnets are fixedly installed on the side of the magnetic conduction plate close to the stator assembly.

[0015] Optionally, the end of the magnetic conduction plate along the third direction extends to the outside of the second magnetic part on both sides.

[0016] The beneficial effects of the present application are as follows:

[0017] The vibration device described in the present application includes an oscillator assembly and a stator assembly. The oscillator assembly vibrates along the third direction. The oscillator assembly includes first magnetic parts located on both sides of the stator assembly along the second direction, the second direction is perpendicular to the third direction. The oscillator assembly further includes second magnetic parts located on both sides of the stator assembly along the third direction. The first magnetic part and the second magnetic part form a magnetic circuit passing through the coil. The second magnetic part includes a second magnet, which is of an integral structure and has two magnetic regions distributed along the second direction. The magnetization directions of the two magnetic regions are opposite to each other and are both parallel to the second direction; the second magnetic part plays a role in guiding and enhancing the magnetic induction lines, can effectively reduce magnetic leakage, improve the utilization rate of the magnetic field, and enhance the driving force of the product; it has the advantages of high effective utilization rate of the magnetic field, low magnetic leakage, and fast response. Description of the Drawings

[0018] The following attached drawings are only intended to illustrate and explain the present utility model schematically, and do not limit the scope of the present utility model. Among them:

[0019] Figure 1 is the exploded view of the first embodiment of the present utility model;

[0020] Figure 2 is the first magnetization direction diagram of the first embodiment of the present utility model;

[0021] Figure 3 is the first magnetic induction line distribution diagram of the first embodiment of the present utility model;

[0022] Figure 4 is the second magnetization direction diagram of the first embodiment of the present utility model;

[0023] Figure 5 is the second magnetic induction line distribution diagram of the first embodiment of the present utility model;

[0024] Figure 6 is the exploded view of the second embodiment of the present utility model;

[0025] Figure 7 is the first magnetization direction diagram of the second embodiment of the present utility model;

[0026] Figure 8 is the first magnetic induction line distribution diagram of the second embodiment of the present utility model;

[0027] Figure 9 is the second magnetization direction diagram of the second embodiment of the present utility model;

[0028] Figure 10 is the second magnetic induction line distribution diagram of the second embodiment of the present utility model.

[0029] In the figure: 11 - coil; 12 - core column; 13 - pole shoe; 2 - first magnet; 3 - magnetic conduction plate; 4 - convex block; 5 - second magnet; 61 - mass block; 62 - oscillator cavity; 71 - intermediate magnet; 72 - edge magnet. Detailed implementation manners

[0030] The present utility model will be further described below in conjunction with the attached drawings and embodiments. In the following detailed description, only some exemplary embodiments of the present utility model are described by way of illustration. It is undoubted that those of ordinary skill in the art can recognize that the described embodiments can be modified in various different ways without departing from the spirit and scope of the present utility model. Therefore, the attached drawings and description are illustrative in nature and are not used to limit the protection scope of the claims.

[0031] The first direction, the second direction, and the third direction in the following description are perpendicular to each other in pairs, and the directions of the first direction, the second direction, and the third direction are as shown Figure 1 in the upper right corner

[0032] As shown Figures 1 to 10 in, a vibration device includes an oscillator assembly and a stator assembly. The oscillator assembly vibrates in the third direction. The stator assembly includes an iron core and a coil 11 wound around the iron core. The axial direction of the iron core is parallel to the third direction. The oscillator assembly includes first magnetic parts located on both sides of the stator assembly along the second direction. The second direction is perpendicular to the third direction. The oscillator assembly further includes second magnetic parts located on both sides of the stator assembly along the third direction. The first magnetic parts and the second magnetic parts form a magnetic circuit passing through the coil 11. The second magnetic part includes a second magnet 5. The second magnet 5 is an integral structure and has two magnetic regions distributed along the second direction. The magnetization directions of the two magnetic regions are opposite and both are parallel to the second direction.

[0033] The iron core includes a core column 12 for winding the coil 11, and pole shoes 13 are vertically provided at both ends of the core column 12.

[0034] Embodiment 1:

[0035] As shown Figures 1 to 5 in, the first magnetic part includes a first magnet 2. The magnetization direction of the first magnet 2 is parallel to the second direction. The first magnetic part further includes a magnetic conduction plate 3. The first magnet 2 is fixedly installed on one side of the magnetic conduction plate 3 close to the stator assembly. Along the third direction, a bump 4 is provided between both ends of the first magnet 2 and the second magnetic part. The height of the bump 4 along the first direction is the same as that of the first magnet 2, and the width of the bump 4 along the second direction is the same as that of the first magnetic part. The first direction is perpendicular to both the second direction and the third direction. The magnetization direction of the first magnet 2 is opposite to the magnetization direction of the corresponding magnetic region of the nearest second magnet 5; the magnetization directions of the first magnets 2 located on both sides of the stator assembly are opposite.

[0036] Furthermore, as shown Figure 2 and Figure 3As shown, the magnetization direction of the first magnet 2 points from the side of the magnetic conduction plate 3 towards the stator assembly side, and the magnetization direction of the second magnet 5 points from the middle towards the two ends. The polarity of the magnetic pole of the first magnet 2 close to the stator assembly is the same as the polarity of the two ends of the second magnet 5. The magnetic induction line direction is as follows: The magnetic induction lines come out from the outer end of one magnetic region of the second magnet 5 and then enter the adjacent bump 4, then pass through the magnetic conduction plate 3 and enter the first magnet 2. After passing through the first magnet 2, they pass through the coil 11 and enter the iron core, and return along the axial direction of the iron core to the middle part of the second magnet 5 mentioned above, thus forming a closed magnetic circuit. The two first magnetic parts and the two second magnetic parts will form four closed magnetic circuits that all pass through the coil 11 in the oscillator cavity 62.

[0037] Further, as Figure 4 and Figure 5 shown, the magnetization direction of the first magnet 2 points from the stator assembly side towards the magnetic conduction plate 3 side, and the magnetization direction of the second magnet 5 points from the two ends towards the middle. The polarity of the magnetic pole of the first magnet 2 close to the stator assembly is the same as the polarity of the two ends of the second magnet 5. The magnetic induction line direction is as follows: The magnetic induction lines come out from the side of the first magnet 2 close to the magnetic conduction plate 3 and then pass through the magnetic conduction plate 3 and the bump 4 in sequence to reach the outer end of the second magnet 5. The magnetic induction lines enter the second magnet 5 from the outer end of the second magnet 5 and come out from the middle part of the second magnet 5, then enter the iron core, reach the middle position along the axial direction of the iron core, pass through the coil 11 and enter the first magnet 2 again, forming a closed magnetic circuit. The two first magnetic parts and the two second magnetic parts will form four closed magnetic circuits that all pass through the coil 11 in the oscillator cavity 62.

[0038] The oscillator assembly further includes a mass block 61. The mass block 61 has an oscillator cavity 62 penetrating along the first direction. The stator assembly is located in the oscillator cavity 62. The two first magnetic parts and the two second magnetic parts are distributed at intervals around the stator assembly. The first magnetic part and the second magnetic part are connected to the inner wall of the oscillator cavity 62. The bump 4 is located in the oscillator cavity 62 and is an integral structure with the mass block 61. The bump 4 can guide the magnetic induction lines of the second magnet 5 to the first magnet 2, enhance the degree of closure of the magnetic induction lines, improve the utilization rate of the magnetic induction lines, reduce magnetic leakage, and enhance the driving force of the product.

[0039] In this embodiment, along the third direction, the width of the magnetic conduction plate 3 is the same as the width of the first magnet 2. Along the first direction, the height of the magnetic conduction plate 3 is the same as the height of the first magnet 2. One side of the magnetic conduction plate 3 facing the stator assembly bonds the first magnet 2, and the other side of the magnetic conduction plate 3 is bonded to the inner wall of the oscillator cavity 62.

[0040] Embodiment 2:

[0041] The difference between this embodiment and Embodiment 1 is that asFigures 6 to 10 As shown, the first magnetic part includes an intermediate magnet 71, with a side magnet 72 arranged on each side of the intermediate magnet 71. The magnetization direction of the intermediate magnet 71 is parallel to the second direction, and the magnetization direction of the intermediate magnet 71 is opposite to that of the corresponding magnetic region of the nearest second magnet 5. The magnetization directions of the two side magnets 72 are parallel to the third direction, and the magnetization directions of the two side magnets 72 are opposite. The magnetic pole of the side magnet 72 on the side close to the intermediate magnet 71 has the same polarity as the magnetic pole of the intermediate magnet 71 facing the stator assembly side. The first magnetic part further includes a magnetic conduction plate 3, and the intermediate magnet 71 and the two side magnets 72 are fixedly installed on one side of the magnetic conduction plate 3 close to the stator assembly. The two ends of the magnetic conduction plate 3 in the second direction extend to the outside of the second magnetic part. In this embodiment, the structure of the second magnetic conduction part is the same as that of the second magnetic conduction part in Embodiment 1, that is, the second magnetic part includes a second magnet 5, the second magnet 5 has two magnetic regions distributed in the second direction, and the magnetization directions of the two magnetic regions are opposite. The magnetization direction of the second magnet 5 is parallel to the second direction. Further, as Figure 7 and Figure 8 shown, the magnetization direction of the intermediate magnet 71 points from the side of the magnetic conduction plate 3 towards the stator assembly side, the magnetization direction of the side magnet 72 points from the outside towards the intermediate magnet 71, and the magnetization direction of the second magnet 5 points from the middle towards the two ends. The polarity of the magnetic pole of the intermediate magnet 71 close to the stator assembly is the same as the polarities of the two ends of the second magnet 5. The magnetic induction line direction is as follows: The magnetic induction lines come out from the outer end of one magnetic region of the second magnet 5 and then enter the adjacent side magnet 72, and then enter the intermediate magnet 71. After passing through the intermediate magnet 71, they pass through the coil 11 and enter the iron core, and return along the axial direction of the iron core to the middle part of the aforementioned second magnet 5, thus forming a closed magnetic circuit. Two first magnetic parts and two second magnetic parts will form four closed magnetic circuits passing through the coil 11 in the oscillator cavity 62.

[0042] Further, as Figure 9 and Figure 10As shown, the magnetization direction of the middle magnet 71 points from the stator assembly side to the magnetic conduction plate 3 side, the magnetization direction of the edge magnet 72 points from the middle magnet 71 side to the outside, and the magnetization direction of the second magnet 5 points from the two ends to the middle. The polarity of the pole of the middle magnet 71 close to the stator assembly is the same as the polarity of the two ends of the second magnet 5. The magnetic induction line direction is as follows: The magnetic induction lines come out from the side of the middle magnet 71 close to the magnetic conduction plate 3 and then enter the edge magnet 72. After passing through the edge magnet 72, they enter the second magnet 5 from the end of the second magnet 5, come out through the middle part of the second magnet 5, then enter the iron core, reach the middle position along the axial direction of the iron core, pass through the coil 11 again and enter the middle magnet 71, forming a closed magnetic circuit. The two first magnetic parts and the two second magnetic parts will form four closed magnetic circuits passing through the coil 11 in the oscillator cavity 62.

[0043] In this embodiment, the two middle magnets 71, the four edge magnets 72 and the two second magnets 5 form a closed ring-shaped distribution around. The middle magnet 71 and the edge magnet 72 are arranged closely, and the two ends of the second magnet 5 are also arranged closely with the corresponding edge magnets 72. This can greatly enhance the degree of closure of the magnetic induction lines, reduce magnetic leakage, and improve the overall magnetic utilization rate. The middle magnet 71 of the first magnetic part and the edge magnets 72 on both sides form a Halbach magnetic circuit, generating the strongest magnetic field with the least number of magnets, and enhancing the field strength in the unit direction by using the special arrangement of the magnetic body units; further reducing magnetic leakage, further improving the utilization rate of the magnetic field, and enhancing the driving force of the product; having the advantages of high effective utilization rate of the magnetic field, low magnetic leakage, and fast response.

[0044] In Figures 2 to 5 , Figures 7 to 10 shows a specific implementation manner of the current direction of the coil 11. The label represents that the current direction is into the paper perpendicular to the drawing plane, and the label ⊙ represents that the current direction is out of the paper perpendicular to the drawing plane.

[0045] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A vibration device, comprising an oscillator assembly and a stator assembly. The oscillator assembly vibrates along a third direction. The stator assembly includes an iron core and a coil wound around the iron core. The axial direction of the iron core is parallel to the third direction. It is characterized in that: The oscillator assembly includes first magnetic parts respectively located on both sides of the stator assembly along a second direction, the second direction being perpendicular to the third direction. The oscillator assembly further includes second magnetic parts respectively located on both sides of the stator assembly along the third direction. The first magnetic parts and the second magnetic parts form a magnetic circuit passing through the coil; The second magnetic part includes a second magnet, the second magnet being an integral structure and having two magnetic regions distributed along the second direction, the magnetization directions of the two magnetic regions being opposite and both parallel to the second direction.

2. The vibration device according to claim 1, wherein: The first magnetic part includes a first magnet, the magnetization direction of the first magnet being parallel to the second direction, the magnetization direction of the first magnet being opposite to the magnetization direction of the corresponding magnetic region of the nearest second magnet; the magnetization directions of the first magnets located on both sides of the stator assembly are opposite.

3. The vibration device according to claim 2, characterized in that: The first magnetic part further includes a magnetic conduction plate, and the first magnet is fixedly installed on the side of the magnetic conduction plate close to the stator assembly.

4. The vibration device according to claim 1, characterized in that: The oscillator assembly further includes a mass block, the mass block having an oscillator cavity penetrating along a first direction, the stator assembly being located in the oscillator cavity, the two first magnetic parts and the two second magnetic parts being spaced apart and distributed around the stator assembly, and the first magnetic parts and the second magnetic parts being connected to the inner wall of the oscillator cavity; the first direction is perpendicular to both the second direction and the third direction.

5. The vibration device according to claim 4, wherein: Along the third direction, a bump connected to the mass block is provided between both ends of the first magnetic part and the second magnetic part.

6. The vibration device according to claim 5, characterized in that: The height of the bump along the first direction is the same as that of the first magnetic part, and the width of the bump along the second direction is the same as that of the first magnetic part.

7. The vibration device according to claim 5, characterized in that: The bump and the mass block are of an integral structure.

8. The vibration device according to claim 1, characterized in that: The first magnetic part includes an intermediate magnet, with a side magnet provided on each side of the intermediate magnet. The magnetization direction of the intermediate magnet is parallel to the second direction, the magnetization direction of the intermediate magnet being opposite to the magnetization direction of the corresponding magnetic region of the nearest second magnet. The magnetization directions of the two side magnets are parallel to the third direction, and the magnetization directions of the two side magnets are opposite. The magnetic pole of the side magnet close to the intermediate magnet side has the same polarity as the magnetic pole of the intermediate magnet facing the stator assembly side.

9. The vibration device according to claim 8, wherein: The first magnetic part further includes a magnetic conduction plate, and the intermediate magnet and the two side magnets are fixedly installed on the side of the magnetic conduction plate close to the stator assembly.

10. The vibration device according to claim 9, characterized in that: The end of the magnetic conduction plate along the third direction extends to the outside of the second magnetic part on both sides.

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