Vibration device and electronic equipment

Abstract

The invention discloses a vibration device and electronic equipment, the vibration device comprises a vibrator assembly and a stator assembly, the vibrator assembly comprises a moving magnetic part, the stator assembly comprises an iron core and a coil wound on the iron core, the vibrator assembly and the stator assembly are arranged at intervals along a second direction, and the vibrator assembly vibrates along a third direction perpendicular to the second direction. The axial direction of the iron core is parallel to the third direction, at least one end of the iron core along the third direction is provided with a fixed magnetic part, and the fixed magnetic part and the moving magnetic part form a magnetic loop; the magnetizing direction of the fixed magnetic part is parallel to the third direction; the movable magnet and the fixed magnetic part form four closed magnetic circuits penetrating through the coil, and the four closed magnetic circuits are located in four directions of the coil, so that the magnetic leakage of the product can be effectively reduced, the utilization rate of the magnetic field is improved, and the driving force of the product is improved.

Description

Technical Field

[0001] The present invention 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 Art

[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 tablets. 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 spring, and the stator assembly is composed of an FPCB, a damper, a limit block, an iron core and a coil. In order for the vibrator assembly to vibrate back and forth, an electromagnetic effect must be generated between the coil and the magnet. The change in the current in the coil causes a change in the magnetic field, causing the vibrator assembly to move.

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

[0004] A technical problem to be solved by the present invention is to provide a vibration device.

[0005] In order to solve the above technical problems, the technical solution of the present invention is: a vibration device, including a vibrator assembly and a stator assembly, the vibrator assembly includes a moving magnetic part, the stator assembly includes an iron core and a coil wound on the iron 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 iron core is parallel to the third direction, and a fixed magnetic part is installed at least at one end of the iron core along the third direction, the fixed magnetic part and the moving magnetic part form a magnetic circuit, and the magnetization direction of the fixed magnetic part is parallel to the third direction.

[0006] Optionally, one fixed magnetizing part is respectively provided at two ends of the iron core along the third direction, and the magnetizing directions of the two fixed magnetizing parts are opposite.

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

[0008] Optionally, the moving magnet is one piece, and the moving magnet 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.

[0009] Optionally, the moving magnet includes a middle magnet and 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 fixed magnetic part away from the iron 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 magnetic parts are opposite.

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

[0011] Optionally, the vibrator assembly also includes a mass block, which has a vibrator cavity extending 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.

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

[0013] Optionally, the iron core includes a core column for winding the coil, and pole shoes are provided at both ends of the core column along the third direction, and the fixed magnetic part is fixed to the side of the pole shoe away from the core column.

[0014] The beneficial effects of this application are: The vibration device described in the present application includes a vibrator assembly and a stator assembly, the vibrator assembly includes a moving magnetic part, the stator assembly includes an iron core and a coil wound on the iron 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 iron core is parallel to the third direction, and a fixed magnetic part is installed at at least one end of the iron core along the third direction, the fixed magnetic part and the moving magnetic part form a magnetic circuit, and the magnetization direction of the fixed magnetic part is parallel to the third direction; the moving magnetic part and the fixed magnetic part form four closed magnetic circuits passing through the coil, and the four closed magnetic circuits are located at four directions of the coil, which can effectively reduce product leakage, improve the utilization rate of the magnetic field, and enhance the driving force of the product.

[0015] A technical problem to be solved by the present invention is to provide an electronic device.

[0016] In order to solve the above technical problem, the technical solution of the present invention is: an electronic device, comprising the vibration device mentioned above.

[0017] The above-mentioned vibration device is applied to electronic equipment. Based on the structural characteristics of the vibration device and the technical advantages of the vibration device in improving the utilization rate of magnetic flux lines and reducing leakage magnetic flux, the product driving force of the electronic equipment is greatly improved, the performance of the electronic equipment is better, and the user experience is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings are intended only to illustrate and explain the present invention, and are not intended to limit the scope of the present invention. Figure 1 is an exploded view of the first embodiment of the present invention; Figure 2 is a cross-sectional view of the first embodiment of the present invention Figure 1 ; Figure 3 is a cross-sectional view of the first embodiment of the present invention Figure 2 ; Figure 4 is a cross-sectional view of the second embodiment of the present invention Figure 1 ; Figure 5 is a cross-sectional view of the second embodiment of the present invention Figure 2 .

[0019] In the figure: 1-moving magnet; 11-middle magnet; 12-side magnet; 2-fixed magnet; 31-mass block; 32-oscillator cavity; 41-core column; 42-coil; 43-pole shoe. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with the accompanying drawings and examples. In the following detailed description, certain exemplary embodiments of the present invention are described only by way of illustration. Needless to say, those of ordinary skill in the art will recognize that the described embodiments may be modified in various ways without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and are not intended to limit the scope of protection of the claims. Embodiment 1

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, a vibration device includes a vibrator assembly and a stator assembly, the vibrator assembly includes a moving magnetic part, the stator assembly includes an iron core and a coil 42 wound on the iron 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 iron core is parallel to the third direction, and a fixed magnetic part is installed at least at one end of the iron core along the third direction, the fixed magnetic part and the moving magnetic part form a magnetic circuit; the magnetization direction of the fixed magnetic part is parallel to the third direction.

[0022] The moving magnet part includes moving magnets 1 respectively located on both sides of the stator assembly, and a gap is left between the stator assembly and the moving magnet 1. The moving magnets 1 are located on both sides, the stator assembly is centered, the center of gravity of the vibrator assembly is centered, and magnetic circuits are formed on both sides of the core axis. The moving magnet 1 is a single piece, and 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.

[0023] The two ends of the iron core along the third direction are respectively provided with a fixed magnetic part, and the magnetization directions of the two fixed magnetic parts are opposite. The two fixed magnetic parts and the moving magnets 1 on both sides of the stator assembly form four closed magnetic circuits around the coil 42. Each of the fixed magnetic parts includes a fixed magnet 2, and the magnetization direction of the fixed magnet 2 is parallel to the third direction.

[0024] The ends 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 ends of the two fixed magnet parts away from the iron 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 implementations, along the third direction, the outer end of the moving magnet 1 is flush with the outer end of the fixed magnet 2, or the outer end of the moving magnet 1 extends to the outside of the outer end of the fixed magnet 2, and the center vertical line of the moving magnet 1 and the stator assembly coincides.

[0025] Furthermore, if Figure 2 As shown, the magnetizing directions of the two fixed magnets 2 are parallel to the third direction and both point from the iron core to the outside, the magnetizing directions of the two fixed magnets 2 are opposite, the moving magnet 1 adopts a multi-pole magnetizing magnet, and its magnetizing direction points from both ends to the middle, one fixed magnet 2 corresponds to one magnetic region of one moving magnet 1, and the magnetizing directions of the two are opposite, one magnetic region of one moving magnet 1 forms a closed magnetic circuit with the corresponding adjacent fixed magnet 2, and four closed magnetic circuits passing through the coil 42 are formed between the two moving magnets 1 and the two fixed magnets 2. This structure can improve the utilization rate of magnetic flux lines, reduce leakage magnetism, and enhance the driving force of the product.

[0026] Furthermore, if Figure 3 As shown, the magnetization directions of the two fixed magnets 2 are parallel to the third direction and both point from the outside to the core. Figure 2 The magnetizing directions of the two fixed magnets 2 are opposite, the moving magnet 1 adopts a multi-pole magnetizing magnet, and its magnetizing direction points from the middle to both ends. A fixed magnet 2 corresponds to a magnetic zone of a moving magnet 1, and the magnetizing directions of the two are opposite. A magnetic zone of a moving magnet 1 forms a closed magnetic circuit with the corresponding adjacent fixed magnet 2, and four closed magnetic circuits passing through the coil 42 are formed between the two moving magnets 1 and the two fixed magnets 2. This structure can improve the utilization rate of magnetic flux lines, reduce leakage magnetism, and enhance the driving force of the product.

[0027] Alternatively, if Figures 1 to 3 As shown, the vibrator assembly also includes a mass block 31, and the mass block 31 has a vibrator cavity 32 that penetrates along a first direction perpendicular to the second direction and the third direction. The two moving magnets 1 are fixed in the vibrator cavity 32 facing each other, and the stator assembly and the fixed magnetic part 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 fixed magnetic part, that is, one side of the fixed magnet 2 is bonded to the iron core, and a gap is left between the other side of the fixed magnet 2 and the inner wall of the vibrator cavity 32, and the fixed 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 to the fixed magnetic part.

[0028] Furthermore, if Figures 1 to 5 As shown, the iron core includes a core column 41 for winding the coil 42, and pole shoes 43 are provided at both ends of the core column 41 along the third direction. The fixed magnetic part is fixed to the side of the pole shoe 43 away from the core column 41; usually, the fixed magnet 2 of the fixed magnetic part is bonded to the pole shoe 43. Embodiment 2

[0029] The difference between this embodiment and the first embodiment is that: Figure 4 and Figure 5 As shown, the moving magnet 1 includes a middle magnet 11 and side magnets 12 located on both sides of the middle magnet 11 along the third direction, the magnetizing direction of the middle magnet 11 is parallel to the second direction, the magnetizing directions of the two side magnets 12 are opposite and parallel to the third direction, the polarity of the end of the fixed magnetic part away from the iron core is the same as the polarity of the end of the middle magnet 11 close to the stator assembly, and the magnetizing directions of the middle magnets 11 of the two moving magnetic parts are opposite.

[0030] Furthermore, the dynamic magnetic part further comprises a magnetic conductive plate (not shown in the figure), and the intermediate magnet 11 and the side magnet 12 are mounted on a side of the magnetic conductive plate close to the stator assembly.

[0031] The fixed magnet part includes a fixed magnet 2, the magnetization direction of the fixed magnet 2 is parallel to the third direction, the fixed magnet 2 and the adjacent side magnets 12 and the center magnet form a closed magnetic circuit, and the magnetization direction of the fixed magnet 2 is opposite to that of the side magnets 12.

[0032] Specifically, Figure 4As shown, the magnetizing directions of the two fixed magnets 2 are parallel to the third direction and both point from the iron core to the outside, the magnetizing directions of the two fixed magnets 2 are opposite, the magnetizing direction of the side magnet 12 is opposite to the magnetizing direction of the adjacent fixed magnet 2, the magnetizing direction of the side magnet 12 points from the outside to the middle magnet 11, and the magnetizing direction of the middle magnet 11 points from the outside to the stator assembly; four closed magnetic circuits passing through the coil 42 are formed around the coil 42. This structure can improve the utilization rate of magnetic flux lines, reduce leakage magnetism, and enhance product driving force.

[0033] Specifically, Figure 5 As shown, the magnetizing directions of the two fixed magnets 2 are parallel to the third direction and both point from the outside to the iron core, the magnetizing directions of the two fixed magnets 2 are opposite, the magnetizing direction of the side magnet 12 is opposite to the magnetizing direction of the adjacent fixed magnet 2, the magnetizing direction of the side magnet 12 points from the middle magnet 11 to the outside, and the magnetizing 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. This structure can improve the utilization rate of magnetic flux lines, reduce leakage magnetism, and enhance product driving force.

[0034] As an application embodiment of the vibration device, an electronic device includes the vibration device described above.

[0035] The above-mentioned vibration device is applied to electronic equipment. Based on the structural characteristics of the vibration device and the technical advantages of the vibration device in improving the utilization rate of magnetic flux lines and reducing leakage magnetic flux, the product driving force of the electronic equipment is greatly improved, the performance of the electronic equipment is better, and the user experience is greatly improved.

[0036] 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 as follows: Figure 1 Shown in the upper right corner.

[0037] exist Figures 2 to 5 In FIG. 4 , a specific implementation of the current direction of the coil 42 is shown, and the marking The current direction is vertical and inward, marked The direction of the current is perpendicular to the graph and points outward.

[0038] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A vibration device, comprising a vibrator assembly and a stator assembly, wherein the vibrator assembly comprises a moving magnetic part, the stator assembly comprises an iron core and a coil wound on the iron core, the vibrator assembly and the stator assembly are arranged at intervals along a second direction, and the vibrator assembly vibrates along a third direction perpendicular to the second direction, characterized in that: The axial direction of the iron core is parallel to the third direction. A fixed magnetic part is installed at at least one end of the iron core along the third direction. The fixed magnetic part and the dynamic magnetic part form a magnetic circuit. The magnetization direction of the fixed magnetic part is parallel to the third direction.

2. The vibration device according to claim 1, characterized in that: One fixed magnet part is respectively disposed at two ends of the iron core along the third direction, and the magnetization directions of the two fixed magnet parts are opposite.

3. The vibration device according to claim 2, characterized in that: The moving magnetic part includes moving magnets respectively located on both sides of the stator assembly, and the polarity of the ends of the moving magnets along the third direction is opposite to the polarity of the ends of the adjacent fixed magnetic part away from the iron core.

4. The vibration device according to claim 3, characterized in that: The moving magnet is one piece and has two magnetic regions along the third direction. The magnetization directions of the two magnetic regions are opposite and parallel to the third direction.

5. The vibration device according to claim 3, characterized in that: The moving magnet includes a middle magnet and 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 fixed magnetic part away from the iron 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 magnetic parts are opposite.

6. The vibration device according to claim 3, characterized in that: The length of the moving magnet along the third direction is greater than the distance between the ends of the two fixed magnet portions away from the iron core.

7. The vibration device according to claim 1, characterized in that: The vibrator assembly also includes a mass block, which has a vibrator cavity that penetrates 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.

8. The vibration device according to claim 7, characterized in that: The inner wall of the vibrator cavity along the third direction has a groove opposite to the fixed magnet portion.

9. The vibration device according to claim 1, characterized in that: The iron core comprises a core column for winding the coil, and pole shoes are arranged at both ends of the core column along the third direction, and the fixed magnetic part is fixed to the side of the pole shoe away from the core column.

10. An electronic device, characterized in that: The invention comprises the vibration device as claimed in any one of claims 1 to 9.

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