Vibration apparatus and electronic device

Abstract

Disclosed in the present invention are a vibration apparatus and an electronic device. The vibration apparatus comprises a vibrator assembly and a stator assembly, wherein the vibrator assembly comprises a moving magnetic portion, the stator assembly comprises a core and a coil wound around the core, the vibrator assembly and the stator assembly are spaced apart in a second direction, the vibrator assembly vibrates in a third direction perpendicular to the second direction, the axial direction of the core is parallel to the third direction, at least one end of the core in the third direction is mounted with a fixed magnetic portion, and the fixed magnetic portion and the moving magnetic portion form a magnetic circuit; the magnetizing direction of the fixed magnetic portion is parallel to the third direction; and the moving magnetic portion and the fixed magnetic portion form four closed magnetic paths, which pass through the coil and are located on sides of the coil in four directions. This can effectively reduce magnetic leakage of a product, improve the utilization of the magnetic field, and improve the driving force of the product.

Description

Vibration device and electronic device TECHNICAL FIELD

[0001] The present application relates to the technical field of electronic products, and in particular to a vibration device and an electronic device based on the 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, as the actuating mechanism of haptic feedback, have been widely used in the field of haptic vibration. 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 problems such as large magnetic leakage. 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 comprising a moving magnet part, the stator assembly comprising an iron core and a coil wound on the iron core, the vibrator assembly and the stator assembly being arranged apart along a second direction, the vibrator assembly vibrating along a third direction perpendicular to the second direction, the axial direction of the iron core being parallel to the third direction, at least one end of the iron core along the third direction being provided with a fixed magnet part, the fixed magnet part and the moving magnet part forming a magnetic circuit, the magnetization direction of the fixed magnet part being parallel to the third direction.

[0006] Optionally, the iron core is provided with one fixed magnet part at each end along the third direction, and the magnetization directions of the two fixed magnet parts are opposite.

[0007] Optionally, the moving magnet part comprises moving magnets located on both sides of the stator assembly, respectively, and the polarity of the end of the moving magnet along the third direction is opposite to the polarity of the end of the adjacent fixed magnet part away from the iron core.

[0008] Optionally, the moving magnet is one piece, and the moving magnet has two magnetic zones along the third direction, the magnetization directions of the two magnetic zones being opposite and parallel to the third direction.

[0009] Optionally, the moving magnet comprises a middle magnet and two side magnets located on both sides of the middle magnet along the third direction, the magnetization direction of the middle magnet is parallel to the second direction, the magnetization directions of the two side magnets are opposite and parallel to the third direction, the polarity of the end of the magnetizing part away from the core is the same as the polarity of the end of the middle magnet close to the stator assembly, and the magnetization directions of the middle magnets of the two moving magnet parts are opposite.

[0010] Optionally, the length of the moving magnet along the third direction is greater than the distance between the two ends of the magnetizing part away from the core.

[0011] Optionally, the vibrator assembly further comprises a mass block, the mass block has a vibrator cavity penetrating along a first direction perpendicular to the second direction and the third direction, the two moving magnets are fixed in the vibrator cavity in opposite directions, and the stator assembly and the magnetizing part extend into the vibrator cavity and are located between the two moving magnets.

[0012] Optionally, the inner wall of the vibrator cavity along the third direction has a groove opposite to the magnetizing part.

[0013] Optionally, the core comprises a core column for winding the coil, the core column is provided with a pole shoe at both ends along the third direction, and the magnetizing part is fixed to the side of the pole shoe away from the core column.

[0014] The beneficial effects of the present application are:

[0015] The vibration device provided by the present application comprises a vibrator assembly and a stator assembly, the vibrator assembly comprises a moving magnet part, the stator assembly comprises a core and a coil wound on the core, the vibrator assembly and the stator assembly are arranged at intervals along a second direction, the vibrator assembly vibrates along a third direction perpendicular to the second direction, the axial direction of the core is parallel to the third direction, at least one end of the core along the third direction is provided with a magnetizing part, the moving magnet part and the magnetizing part form a magnetic circuit passing through the coil, and the magnetization direction of the magnetizing part is parallel to the third direction; the moving magnet part and the magnetizing part form four closed magnetic circuits passing through the coil, the four closed magnetic circuits are located at four positions of the coil, which can effectively reduce product magnetic leakage, improve the utilization rate of the magnetic field, and improve the driving force of the product.

[0016] One of the technical problems to be solved by the present application is to provide an electronic device.

[0017] To solve the above technical problems, the technical scheme of the present application is: an electronic device comprising the vibration device described above.

[0018] The vibration device is applied to an electronic device, based on the structural features of the vibration device, and the technical advantages of the vibration device in improving the magnetic flux utilization and reducing the magnetic flux leakage, the product driving force of the electronic device is greatly improved, the performance of the electronic device is more excellent, and the user experience is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] The following drawings are merely intended to illustrate and explain the present application, and do not limit the scope of the present application. Among them:

[0020] Fig. 1 is an exploded view of the embodiment one of the present application;

[0021] Fig. 2 is a cross-sectional view one of the embodiment one of the present application;

[0022] Fig. 3 is a cross-sectional view two of the embodiment one of the present application;

[0023] Fig. 4 is a cross-sectional view one of the embodiment two of the present application;

[0024] Fig. 5 is a cross-sectional view two of the embodiment two of the present application.

[0025] In the figure: 1 - moving magnet; 11 - intermediate magnet; 12 - edge magnet; 2 - permanent magnet; 31 - mass; 32 - vibrator cavity; 41 - core column; 42 - coil; 43 - pole shoe. DETAILED DESCRIPTION

[0026] The present application will be further described below in conjunction with the drawings and embodiments. In the following detailed description, certain exemplary embodiments of the present application are described by way of illustration only. It is obvious to those skilled in the art that the described embodiments can be modified in various ways without departing from the spirit and scope of the present application. Therefore, the drawings and description are illustrative in nature, and are not intended to limit the scope of the claims.

[0027] Embodiment one:

[0028] As shown in Fig. 1, Fig. 2 and Fig. 3, a vibration device, comprising a vibrator assembly and a stator assembly, the vibrator assembly comprising a moving magnet part, the stator assembly comprising a core and a coil 42 wound on the core, the vibrator assembly and the stator assembly are arranged in a second direction, the vibrator assembly vibrates in a third direction perpendicular to the second direction, the axial direction of the core is parallel to the third direction, at least one end of the core along the third direction is provided with a permanent magnet part, the permanent magnet part and the moving magnet part form a magnetic circuit; the magnetization direction of the permanent magnet part is parallel to the third direction.

[0029] The moving magnet part includes moving magnets 1 located on both sides of the stator assembly, and gaps are left between the stator assembly and the moving magnets 1. The moving magnets 1 are located on both sides, the stator assembly is in the middle, the center of gravity of the vibrator assembly is in the middle, and a magnetic circuit is formed on both sides of the core axis. The moving magnet 1 is a piece, the moving magnet 1 has two magnetic regions along the third direction, and the magnetization directions of the two magnetic regions are opposite and parallel to the third direction.

[0030] The two ends of the core along the third direction are respectively provided with one of the fixed magnet parts, and the magnetization directions of the two fixed magnet parts are opposite. The two fixed magnet parts and the moving magnets 1 on both sides of the stator assembly form four closed magnetic circuits around the coil 42. Each fixed magnet part includes a fixed magnet 2, and the magnetization direction of the fixed magnet 2 is parallel to the third direction.

[0031] The end portions of the two moving magnets 1 along the third direction extend to both sides of the corresponding fixed magnet part, that is, the length of the moving magnet 1 along the third direction is greater than the distance between the end portions of the two fixed magnet parts away from the core, and the fixed magnet part includes a fixed magnet 2, that is, in the second direction, the fixed magnet part is located between the two moving magnets 1. There are two specific embodiments, along the third direction, the outer end portion of the moving magnet 1 is flush with the outer end portion of the fixed magnet 2, or the outer end portion of the moving magnet 1 extends to the outside of the outer end portion of the fixed magnet 2, and the center perpendiculars of the moving magnet 1 and the stator assembly are coincident.

[0032] Further, as shown in FIG. 2, the magnetization directions of the two fixed magnets 2 are parallel to the third direction and point from the core to the outside, and the magnetization directions of the two fixed magnets 2 are opposite. The moving magnet 1 adopts a multi-pole magnetization magnet, and the magnetization direction thereof points from both ends to the middle. One fixed magnet 2 corresponds to one magnetic region of one moving magnet 1, and the magnetization directions thereof are opposite. One magnetic region of one moving magnet 1 forms a closed magnetic circuit with the corresponding adjacent fixed magnet 2. Four closed magnetic circuits passing through the coil 42 are formed between the two moving magnets 1 and the two fixed magnets 2. The structure can improve the utilization rate of magnetic induction lines, reduce magnetic leakage, and improve the driving force of the product.

[0033] Further, as shown in FIG. 3, the magnetization directions of the two fixed magnets 2 are parallel to the third direction and point from the outside to the core, which is opposite to the magnetization direction in FIG. 2. The magnetization directions of the two fixed magnets 2 are opposite. The moving magnet 1 adopts a multi-pole magnetization magnet, and the magnetization direction thereof points from the middle to both ends. One fixed magnet 2 corresponds to one magnetic region of one moving magnet 1, and the magnetization directions thereof are opposite. One magnetic region of one moving magnet 1 forms a closed magnetic circuit with the corresponding adjacent fixed magnet 2. Four closed magnetic circuits passing through the coil 42 are formed between the two moving magnets 1 and the two fixed magnets 2. The structure can improve the utilization rate of magnetic induction lines, reduce magnetic leakage, and improve the driving force of the product.

[0034] Optionally, as shown in Figs. 1-3, the vibrator assembly further comprises a mass 31 having a vibrator cavity 32 extending along a first direction perpendicular to the second and third directions, the two moving magnets 1 are fixed in the vibrator cavity 32, and the stator assembly and the magnetizing portion extend into the vibrator cavity 32 and are located between the two moving magnets 1. A gap is left between the inner wall of the vibrator cavity 32 along the third direction and the adjacent magnetizing portion, that is, one side of the magnetizing magnet 2 is bonded to the core, and a gap is left between the other side of the magnetizing magnet 2 and the inner wall of the vibrator cavity 32, so that the magnetizing magnet 2 cannot be tightly attached to the inner wall of the vibrator cavity 32. The inner wall of the vibrator cavity 32 along the third direction has a groove opposite the magnetizing portion.

[0035] Further, as shown in Figs. 1-5, the core comprises a core column 41 for winding the coil 42, both ends of the core column 41 along the third direction are provided with pole shoes 43, and the magnetizing portion is fixed to the side of the pole shoes 43 away from the core column 41. Generally, the magnetizing magnet 2 of the magnetizing portion is bonded to the pole shoe 43.

[0036] Embodiment Two:

[0037] The difference between this embodiment and Embodiment One is that, as shown in Figs. 4 and 5, the moving magnet 1 comprises a middle magnet 11 and edge magnets 12 located on both sides of the middle magnet 11 along the third direction, the magnetization direction of the middle magnet 11 is parallel to the second direction, the magnetization directions of the two edge magnets 12 are opposite and parallel to the third direction, the polarity of the end of the magnetizing portion away from the core is the same as the polarity of the end of the middle magnet 11 close to the stator assembly, and the magnetization directions of the middle magnets 11 of the two moving magnets are opposite.

[0038] Further, the moving magnet further comprises a magnetic conducting plate (not shown in the figure), and the middle magnet 11 and the edge magnets 12 are installed on the side of the magnetic conducting plate close to the stator assembly.

[0039] The magnetizing portion comprises a magnetizing magnet 2, the magnetization direction of the magnetizing magnet 2 is parallel to the third direction, the magnetizing magnet 2 and the adjacent edge magnets 12 and middle magnet form a closed magnetic circuit, and the magnetization direction of the magnetizing magnet 2 is opposite to the magnetization direction of the edge magnet 12.

[0040] Specifically, as shown in FIG. 4, the magnetization directions of the two stator magnets 2 are parallel to the third direction and both point outward from the core, the magnetization directions of the two stator magnets 2 are opposite, the magnetization direction of the edge magnet 12 is opposite to the magnetization direction of the adjacent stator magnet 2, the magnetization direction of the edge magnet 12 points from the outside to the middle magnet 11, and the magnetization direction of the middle magnet 11 points from the stator assembly to the outside; four closed magnetic loops passing through the coil 42 are formed around the coil 42, the structure can improve the magnetic flux utilization rate, reduce the magnetic flux leakage, and improve the product driving force.

[0041] Specifically, as shown in FIG. 5, the magnetization directions of the two stator magnets 2 are parallel to the third direction and both point outward from the core, the magnetization directions of the two stator magnets 2 are opposite, the magnetization direction of the edge magnet 12 is opposite to the magnetization direction of the adjacent stator magnet 2, the magnetization direction of the edge magnet 12 points from the middle magnet 11 to the outside, and the magnetization direction of the middle magnet 11 points from the stator assembly to the outside; four closed magnetic loops passing through the coil 42 are formed around the coil 42, the structure can improve the magnetic flux utilization rate, reduce the magnetic flux leakage, and improve the product driving force.

[0042] As an application embodiment of the vibration device, an electronic device includes the vibration device described above.

[0043] The vibration device described above is applied to an electronic device, based on the structural characteristics of the vibration device, and the technical advantages of the vibration device in improving the magnetic flux utilization rate and reducing the magnetic flux leakage, the product driving force of the electronic device is greatly improved, the performance of the electronic device is more excellent, and the user experience is greatly improved.

[0044] The first direction, the second direction and the third direction 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.

[0045] In FIGS. 2 to 5, a specific embodiment of the current direction of the coil 42 is shown, and the current direction of the coil 42 is shown by a solid line. represents the current direction is perpendicular to the picture inward, and represents the current direction is perpendicular to the picture outward.

[0046] The basic principles, main features and advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above 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 claimed 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 comprising a moving magnet part, the stator assembly comprising a core and a coil wound on the core, the vibrator assembly and the stator assembly being arranged apart along a second direction, the vibrator assembly vibrating along a third direction perpendicular to the second direction, characterized in that: an axial direction of the core is parallel to the third direction, at least one end of the core along the third direction is provided with a fixed magnet part, the fixed magnet part and the moving magnet part form a magnetic circuit, and a magnetization direction of the fixed magnet part is parallel to the third direction. Both ends of the core along the third direction are provided with the fixed magnet part respectively, and magnetization directions of the two fixed magnet parts are opposite.

2. The vibration apparatus of claim 1, wherein: The moving magnet part comprises moving magnets respectively located on both sides of the stator assembly, and end polarities of the moving magnets along the third direction are opposite to end polarities of the adjacent fixed magnet part away from the core.

3. The vibration apparatus of claim 2, wherein: The moving magnet part is a single piece, and the moving magnet part has two magnetic zones along the third direction, and magnetization directions of the two magnetic zones are opposite and parallel to the third direction.

4. The vibration apparatus of claim 3, wherein: The moving magnet part comprises a middle magnet and side magnets respectively located on both sides of the middle magnet along the third direction, a magnetization direction of the middle magnet is parallel to the second direction, magnetization directions of the two side magnets are opposite and parallel to the third direction, an end polarity of the fixed magnet part away from the core is the same as an end polarity of the middle magnet close to the stator assembly, and magnetization directions of the middle magnets of the two moving magnet parts are opposite.

5. The vibration apparatus of claim 3, wherein: A length of the moving magnet part along the third direction is greater than a distance between the ends of the two fixed magnet parts away from the core.

6. The vibration apparatus of claim 3, wherein: The vibrator assembly further comprises a mass block, the mass block has a vibrator cavity penetrating along a first direction perpendicular to the second direction and the third direction, the two moving magnets are fixed in the vibrator cavity facing each other, and the stator assembly and the fixed magnet part extend into the vibrator cavity and are located between the two moving magnets.

7. The vibration apparatus of claim 1, wherein: An inner wall of the vibrator cavity along the third direction has a groove opposite to the fixed magnet part.

8. The vibration apparatus of claim 7, wherein: The core comprises a core column for winding the coil, the core column is provided with a pole piece at both ends along the third direction, and the fixed magnet part is fixed to a side of the pole piece away from the core column.

9. The vibration apparatus of claim 1, wherein: The vibration device comprises any one of claims 1-9.

10. An electronic device, comprising: ​

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