Vibration device

Abstract

Disclosed in the present invention is a vibration device, comprising a vibrator assembly and a stator assembly; the vibrator assembly vibrates in a third direction; the vibrator assembly comprises first magnetic parts respectively located on two sides of the stator assembly in a second direction, the second direction being perpendicular to the third direction; the vibrator assembly further comprises second magnetic parts respectively located on two sides of the stator assembly in the third direction; the first magnetic parts and the second magnetic parts form magnetic circuits passing through a coil; each second magnetic part comprises a second magnet, and the second magnet is of an integrated structure and has two magnetic regions distributed in the second direction, the magnetization directions of the two magnetic regions being opposite to each other and being both parallel to the second direction; the second magnetic parts function to guide and enhance magnetic flux lines, thus effectively reducing magnetic flux leakage, increasing the utilization rate of magnetic fields, and improving the driving force of products. The present invention achieves the advantages of high effective utilization rate of magnetic fields, low magnetic flux leakage and fast response.

Description

Vibration device TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic products, and in particular to a vibration device. BACKGROUND

[0002] With the gradual development of electronic product technology, vibration excitation devices have become commonly used functional devices in electronic products such as mobile phones and tablet computers. Existing micro vibration excitation devices generally include a vibrator assembly and a stator assembly. The vibrator assembly is composed of a mass block, a magnet and a spring sheet. The stator assembly is composed of an FPCB, a damper, a limiting block, an iron core and a coil. In order to enable the vibrator assembly to reciprocate, electromagnetic action needs to be generated between the coil and the magnet. Changes in the magnetic field caused by changes in the current in the coil enable the vibrator assembly to move.

[0003] Linear motors are widely used in the field of haptic vibration as the actuator of haptic feedback. In the prior art, the magnetic circuit of the iron core structure of the stator assembly has low effective utilization rate of the magnetic field, small driving force and large leakage magnetic field. SUMMARY

[0004] One of the technical problems solved by the present application is to provide a vibration device.

[0005] To solve the above technical problems, the technical solution of the present application is as follows: a vibration device, comprising a vibrator assembly and a stator assembly, the vibrator assembly vibrates along a third direction, the stator assembly comprises an iron core and a coil wound on the iron core, the axial direction of the iron core is parallel to the third direction, the vibrator assembly comprises first magnetic parts located on both sides of the stator assembly along a second direction, the second direction is perpendicular to the third direction, the vibrator assembly further comprises 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 comprises a second magnet, the second magnet is an integral structure and has two magnetic zones distributed along the second direction, the magnetization directions of the two magnetic zones are opposite and both are parallel to the second direction.

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

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

[0009] Optionally, the vibrator assembly further comprises a mass block having a vibrator cavity penetrating in the first direction, the stator assembly is located in the vibrator cavity, two first magnetic parts and two second magnetic parts are distributed around the stator assembly, the first magnetic part and the second magnetic part are connected with the inner wall of the vibrator cavity; the first direction is perpendicular to the second direction and the third direction.

[0010] Optionally, along the third direction, two ends of the first magnetic part and the second magnetic part are provided with a protrusion connected with the mass block.

[0011] Optionally, the height of the protrusion along the first direction is consistent with that of the first magnetic part, and the width of the protrusion along the second direction is consistent with that of the first magnetic part.

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

[0013] Optionally, the first magnetic part comprises a middle magnet, two side magnets are arranged on both sides of the middle magnet respectively, the magnetization direction of the middle magnet is parallel to the second direction, the magnetization direction of the middle magnet is opposite to that of the corresponding magnetic area 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, and the magnetic pole of the side magnet close to the middle magnet side is of the same polarity as the magnetic pole of the middle magnet facing the stator assembly side.

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

[0015] Optionally, the end of the magnetic conducting 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:

[0017] The vibration device provided by the present application comprises a vibrator assembly and a stator assembly, the vibrator assembly vibrates along the third direction, the vibrator assembly comprises a first magnetic part located on both sides of the stator assembly along the second direction, the second direction is perpendicular to the third direction, the vibrator assembly further comprises a second magnetic part 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 penetrating the coil, the second magnetic part comprises a second magnet, the second magnet is an integral structure and has two magnetic areas distributed along the second direction, the magnetization directions of the two magnetic areas are opposite and parallel to the second direction; the second magnetic part plays a guiding and enhancing role on the magnetic induction lines, can effectively reduce the magnetic leakage, improve the utilization rate of the magnetic field, and improve the driving force of the product; has the advantages of high effective utilization rate of magnetic field, low magnetic leakage, and fast response. BRIEF DESCRIPTION OF DRAWINGS

[0018] The accompanying drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of this specification. Illustrations in the drawings are for purposes of illustrative only and the present application should not be limited thereto as illustrated and described.

[0019] Fig. 1 is an exploded view of the first embodiment of the present application;

[0020] Fig. 2 is a first magnetizing direction view of the first embodiment of the present application;

[0021] Fig. 3 is a first magnetic field line distribution view of the first embodiment of the present application;

[0022] Fig. 4 is a second magnetizing direction view of the first embodiment of the present application;

[0023] Fig. 5 is a second magnetic field line distribution view of the first embodiment of the present application;

[0024] Fig. 6 is an exploded view of the second embodiment of the present application;

[0025] Fig. 7 is a first magnetizing direction view of the second embodiment of the present application;

[0026] Fig. 8 is a first magnetic field line distribution view of the second embodiment of the present application;

[0027] Fig. 9 is a second magnetizing direction view of the second embodiment of the present application;

[0028] Fig. 10 is a second magnetic field line distribution view of the second embodiment of the present application.

[0029] In the drawings: 11 - coil; 12 - core column; 13 - pole shoe; 2 - first magnet; 3 - magnetic conducting plate; 4 - protrusion; 5 - second magnet; 61 - mass; 62 - vibrator cavity; 71 - middle magnet; 72 - side magnet. DETAILED DESCRIPTION

[0030] The present application will be further described with reference to the drawings and embodiments. In the following detailed description, certain exemplary embodiments of the present application are described by way of illustration only. It will be apparent to those skilled in the art that the embodiments described can be practiced in a variety of ways without deviating from the spirit and scope of the present application. Thus, the drawings and description are illustrative in nature and not restrictive in nature.

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

[0032] As shown in FIG. 1 to FIG. 10, a vibrating device includes a vibrator assembly and a stator assembly, the vibrator assembly vibrates along a third direction, the stator assembly includes a core and a coil 11 wound on the core, the axial direction of the core is parallel to the third direction, the vibrator assembly includes first magnetic parts respectively located on both sides of the stator assembly along a second direction, the second direction is perpendicular to the third direction, the vibrator 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 11. The second magnetic part includes a second magnet 5, the second magnet 5 is an integrated structure and has two magnetic zones distributed along the second direction, the magnetization directions of the two magnetic zones are opposite and both are parallel to the second direction.

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

[0034] Embodiment one:

[0035] As shown in FIG. 1 to FIG. 5, 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 conductive plate 3, the first magnet 2 is fixedly installed on the side of the magnetic conductive plate 3 close to the stator assembly. Along the third direction, one protrusion 4 is arranged between both ends of the first magnetic part and the second magnetic part, the height of the protrusion 4 along a first direction is consistent with that of the first magnetic part, the width of the protrusion 4 along a second direction is consistent with that of the first magnetic part, the first direction is perpendicular to the second direction and the third direction. The magnetization direction of the first magnet 2 is opposite to that of the corresponding magnetic zone 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] Further, as shown in FIG. 2 and FIG. 3, the magnetization direction of the first magnet 2 points from the side of the magnetic conductive plate 3 to the side of the stator assembly, the magnetization direction of the second magnet 5 points from the middle to both ends, the polarity of the magnetic pole of the first magnet 2 close to the stator assembly is the same as that of both ends of the second magnet 5; the magnetic induction lines run as follows: the magnetic induction lines come out from the outer end of one magnetic zone of the second magnet 5, enter the adjacent protrusion 4, then pass through the magnetic conductive plate 3 to the first magnet 2, pass through the coil 11 to the inside of the core after passing through the first magnet 2, and return to the middle part of the second magnet 5 in front along the axial direction of the core, thus forming a closed magnetic circuit. The two first magnetic parts and the two second magnetic parts form four closed magnetic circuits passing through the coil 11 in the vibrator cavity 62.

[0037] Further, as shown in Fig. 4 and Fig. 5, the magnetization direction of the first magnet 2 points from the stator assembly side to the magnetic conducting plate 3 side, the magnetization direction of the second magnet 5 points from the two ends to the middle, the polarity of the 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 lines run as follows: the magnetic induction lines come out from the side of the first magnet 2 close to the magnetic conducting plate 3, then pass through the magnetic conducting plate 3, the protrusion 4, and 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, then come out from the middle of the second magnet 5, and then enter the iron core, reach the middle position along the axial direction of the iron core, pass through the coil 11, and then enter the first magnet 2 again, forming a closed magnetic loop. The two first magnetic parts and the two second magnetic parts form four closed magnetic loops passing through the coil 11 in the vibrator cavity 62.

[0038] The vibrator assembly further comprises a mass block 61, the mass block 61 has a vibrator cavity 62 penetrating in the first direction, the stator assembly is located in the vibrator cavity 62, the two first magnetic parts and the two second magnetic parts are distributed around the stator assembly, and the first magnetic part and the second magnetic part are connected with the inner wall of the vibrator cavity 62. The protrusion 4 is located in the vibrator cavity 62 and is an integral structure with the mass block 61, the protrusion 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 the magnetic leakage, and improve the driving force of the product.

[0039] In the embodiment, along the third direction, the width of the magnetic conducting plate 3 is consistent with the width of the first magnet 2, along the first direction, the height of the magnetic conducting plate 3 is consistent with the height of the first magnet 2, the side of the magnetic conducting plate 3 facing the stator assembly is bonded with the first magnet 2, and the other side of the magnetic conducting plate 3 is bonded on the inner wall of the vibrator cavity 62.

[0040] Embodiment two:

[0041] The difference between the present embodiment and embodiment one is that, as shown in FIGS. 6-10, the first magnetic part includes a middle magnet 71, one side magnet 72 is arranged on each side of the middle magnet 71, the magnetization direction of the middle magnet 71 is parallel to the second direction, and the magnetization direction of the middle magnet 71 is opposite to the magnetization direction of the corresponding magnetic area of the nearest second magnet 5; the magnetization direction of the two side magnets 72 is parallel to the third direction, and the magnetization direction of the two side magnets 72 is opposite, and the magnetic pole of the side magnet 72 close to the middle magnet 71 is of the same polarity as the magnetic pole of the middle magnet 71 facing the stator assembly. The first magnetic part further includes a magnetic conductive plate 3, and the middle magnet 71 and the two side magnets 72 are fixedly installed on the side of the magnetic conductive plate 3 close to the stator assembly. The two ends of the magnetic conductive plate 3 along the second direction extend to the outside of the second magnetic part. In the present embodiment, the structure of the second magnetic conductive part is the same as that of the second magnetic conductive part of embodiment one, that is, the second magnetic part includes a second magnet 5, the second magnet 5 has two magnetic areas distributed along the second direction, the magnetization direction of the two magnetic areas is opposite, and the magnetization direction of the second magnet 5 is parallel to the second direction. Further, as shown in FIGS. 7 and 8, the magnetization direction of the middle magnet 71 points from the magnetic conductive plate 3 side to the stator assembly side, the magnetization direction of the side magnet 72 points from the outside to the middle magnet 71, the magnetization direction of the second magnet 5 points from the middle to the two ends, and the polarity of the magnetic 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 lines run as follows: the magnetic induction lines come out from the outer end of one magnetic area of the second magnet 5, enter the adjacent side magnet 72, then enter the middle magnet 71, pass through the middle magnet 71, pass through the coil 11 to enter the inside of the core, and return to the middle of the second magnet 5 along the axial direction of the core, thus forming a closed magnetic loop. The two first magnetic parts and the two second magnetic parts form four closed magnetic loops in the vibrator cavity 62, each of which passes through the coil 11.

[0042] Further, as shown in FIGS. 9 and 10, the magnetization direction of the middle magnet 71 points from the stator assembly side to the magnetic conductive plate 3 side, the magnetization direction of the side magnet 72 points from the middle magnet 71 side to the outside, the magnetization direction of the second magnet 5 points from the two ends to the middle, and the polarity of the magnetic 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 lines run as follows: the magnetic induction lines come out from the side of the middle magnet 71 close to the magnetic conductive plate 3, enter the side magnet 72, pass through the side magnet 72, enter the second magnet 5 from the end of the second magnet 5, pass through the middle of the second magnet 5, then enter the core, pass through the coil 11 again to enter the middle magnet 71, and form a closed magnetic loop. The two first magnetic parts and the two second magnetic parts form four closed magnetic loops in the vibrator cavity 62, each of which passes through the coil 11.

[0043] In the embodiment, the two intermediate magnets 71, the four edge magnets 72 and the two second magnets 5 form a four-circumferential-closed annular distribution, and the intermediate magnets 71 are arranged close to the edge magnets 72, and the two ends of the second magnets 5 are also arranged close to the corresponding edge magnets 72, so that the closed degree of the magnetic induction lines can be greatly enhanced, the magnetic leakage can be reduced, and the overall magnetic utilization rate can be improved. The intermediate magnets 71 and the edge magnets 72 on both sides of the first magnetic part form a Halbach magnetic circuit (Halbach array magnetic circuit), the strongest magnetic field is generated with the least magnets, the field strength in the unit direction is enhanced by using the special arrangement of the magnet units, the magnetic leakage is further reduced, the utilization rate of the magnetic field is further improved, the driving force of the product is improved, and the product has the advantages of high effective utilization rate of the magnetic field, low magnetic leakage and fast response.

[0044] In FIGS. 2-5 and 7-10, one specific embodiment of the current direction of the coil 11 is shown, and the direction of the current is indicated by ⊙ represents the direction of the current is perpendicular to the plane and inward, and ⊙ represents the direction of the current is perpendicular to the plane and outward.

[0045] The basic principles, main features and advantages of the present application are shown and described above. It should be understood by those skilled in the art that the present application is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. A vibration device comprising a vibrator assembly and a stator assembly, the vibrator assembly vibrating along a third direction, the stator assembly comprising a core and a coil wound on the core, the core having an axis parallel to the third direction, characterized in that: the vibrator assembly comprises first magnetic portions respectively located on two sides of the stator assembly along a second direction perpendicular to the third direction, and second magnetic portions respectively located on two sides of the stator assembly along the third direction, the first magnetic portions and the second magnetic portions forming a magnetic circuit passing through the coil; the second magnetic portions comprise second magnets which are of an integral structure and have two magnetic zones distributed along the second direction, the two magnetic zones having opposite magnetization directions parallel to the second direction. The first magnetic portions comprise first magnets having magnetization directions parallel to the second direction, the magnetization direction of each first magnet being opposite to that of the corresponding magnetic zone of the nearest second magnet; the magnetization directions of the first magnets located on the two sides of the stator assembly are opposite. The first magnetic portions further comprise magnetic conductive plates on which the first magnets are fixedly installed on a side close to the stator assembly.

2. The vibration apparatus of claim 1, wherein: The vibrator assembly further comprises a mass block having a vibrator cavity passing through along a first direction, the stator assembly being located in the vibrator cavity, the two first magnetic portions and the two second magnetic portions being distributed around the stator assembly, the first magnetic portions and the second magnetic portions being connected to the inner wall of the vibrator cavity; the first direction is perpendicular to the second direction and the third direction.

3. The vibration apparatus of claim 2, wherein: Along the third direction, each of the two ends of the first magnetic portion and the second magnetic portion is provided with a protrusion connected to the mass block.

4. The vibration apparatus of claim 1, wherein: The protrusion has a height along the first direction consistent with that of the first magnetic portion, and a width along the second direction consistent with that of the first magnetic portion.

5. The vibration apparatus of claim 4, wherein: The protrusion and the mass block are of an integral structure.

6. The vibration apparatus of claim 5, wherein: The first magnetic portion comprises a middle magnet, two side magnets being respectively arranged on two sides of the middle magnet, the magnetization direction of the middle magnet being parallel to the second direction, the magnetization direction of the middle magnet being opposite to that of the corresponding magnetic zone of the nearest second magnet, the magnetization directions of the two side magnets being parallel to the third direction, and the magnetization directions of the two side magnets being opposite, the magnetic pole of the side magnet close to the middle magnet being of the same polarity as the magnetic pole of the middle magnet facing the stator assembly.

7. The vibration apparatus of claim 5, wherein: The first magnetic portion further comprises a magnetic conductive plate on which the middle magnet and the two side magnets are fixedly installed on a side close to the stator assembly.

8. The vibration apparatus of claim 1, wherein: The end of the magnetic conductive plate along the third direction extends to the outside of the second magnetic portion on both sides.

9. The vibrating device of claim 8, wherein: ​ 10. The vibrating device of claim 9, wherein: ​

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