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 moving magnetic part comprises a moving magnet, the moving magnet is provided with two magnetic areas in the third direction, and the magnetizing directions of the two magnetic areas are opposite; the moving magnetic part adopts a multi-pole magnetizing magnet, so that the structure is simple, and the production and manufacturing process is optimized; 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, comprising a vibrator assembly and a stator assembly, the vibrator assembly comprising a moving magnetic part, the stator assembly comprising 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, at least one end of the iron core along the third direction is installed with a fixed magnetic part, and the fixed magnetic part and the moving magnetic part form a magnetic circuit;

[0006] The moving magnet part includes moving magnets respectively located on both sides of the stator assembly. The moving magnet is an integral structure 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.

[0007] Optionally, the moving magnet part also includes a reinforcing magnet arranged on the side of the moving magnet away from the stator assembly, the magnetization direction of the reinforcing magnet is parallel to the second direction, and the end polarity of the reinforcing magnet close to the moving magnet is opposite to the end polarity of the moving magnet along the third direction.

[0008] Optionally, one fixed magnetic part is respectively provided at two ends of the iron core along the third direction.

[0009] Optionally, the fixed magnet part includes a fixed magnet, the magnetization direction of the fixed magnet is parallel to the third direction, the fixed magnet and a magnetic region of an adjacent moving magnet form a closed magnetic circuit, and the magnetization direction of the fixed magnet is opposite to the magnetization direction of the adjacent magnetic region.

[0010] Optionally, the fixed magnet part includes a fixed magnet, which is an integral structure and includes two magnetic regions distributed along the second direction, the magnetization directions of the two magnetic regions are opposite and parallel to the second direction, and the end polarity of the fixed magnet along the second direction is opposite to the end polarity of the moving magnet along the third direction.

[0011] Optionally, the length of the two moving magnets along the third direction is greater than the distance between the ends of the two fixed magnetic parts away from the iron core.

[0012] 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.

[0013] Optionally, the inner wall of the vibrator cavity along the third direction has a groove opposite to the fixed magnetic part.

[0014] 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.

[0015] The beneficial effects of this application are:

[0016] 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, and the fixed magnetic part and the moving magnetic part form a magnetic circuit; the moving magnetic part includes a moving magnet, the moving magnet is an integrated structure and has two magnetic regions along the third direction, and the magnetization directions of the two magnetic regions are opposite; the moving magnetic part adopts a multi-pole magnetizing magnet, which has a simple structure and optimizes the production and manufacturing process; the moving magnet 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.

[0017] A technical problem to be solved by the present invention is to provide an electronic device.

[0018] 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.

[0019] 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

[0020] The following drawings are intended only to illustrate and explain the present invention, and do not limit the scope of the present invention.

[0021] Figure 1 is an exploded view of the first embodiment of the present invention;

[0022] Figure 2 is a cross-sectional view of the first embodiment of the present invention Figure 1 ;

[0023] Figure 3 This is a magnetic flux distribution trend diagram of the first embodiment of the present invention;

[0024] Figure 4 is a cross-sectional view of the first embodiment of the present invention Figure 2 ;

[0025] Figure 5 is a cross-sectional view of the second embodiment of the present invention Figure 1 ;

[0026] Figure 6 is a cross-sectional view of the second embodiment of the present invention Figure 2 ;

[0027] Figure 7 is a cross-sectional view of the third embodiment of the present invention Figure 1 ;

[0028] Figure 8 is a cross-sectional view of the third embodiment of the present invention Figure 2 ;

[0029] Fig. 9 is a cross-sectional view of a fourth embodiment of the present invention Figure 1 ;

[0030] Fig.10 is a cross-sectional view of a fourth embodiment of the present invention Figure 2 .

[0031] In the figure: 1-moving magnet; 2-fixed magnet; 31-mass block; 32-oscillator cavity; 41-core column; 42-coil; 43-pole shoe; 5-reinforcement magnet. DETAILED DESCRIPTION

[0032] 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.

[0033] Embodiment 1:

[0034] like Figure 1 , Figure 2 , Figure 3 and Figure 4 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 the 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 the fixed magnetic part is installed at least at one end of the iron core along the third direction, and the fixed magnetic part and the moving magnetic part form a magnetic circuit; the moving magnetic part includes two moving magnets 1, and the two moving magnets 1 are 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 magnet 1 adopts a multi-pole magnetized magnet, the moving magnet 1 is an integrated structure and 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.

[0035] As a preferred embodiment, one fixed magnetic part is provided at each of the two ends of the iron core along the third direction. The two fixed magnetic parts can form a magnetic circuit with the moving magnetic part at both ends.

[0036] The ends of the two moving magnets 1 along the third direction extend to both sides of the corresponding fixed magnet parts, and each 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, that is, the length of the two moving magnets 1 along the third direction is greater than the distance between the ends of the two fixed magnet parts away from the iron core. 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.

[0037] Furthermore, 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 a magnetic zone of the adjacent moving magnet 1 form a closed magnetic circuit, and the magnetization direction of the fixed magnet 2 is opposite to the magnetization direction of the adjacent magnetic zone.

[0038] Furthermore, if Figure 2 and Figure 3As 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. The distribution of the magnetic flux lines in this embodiment is shown in FIG. Figure 3 As shown, 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 magnetic leakage, and enhance the driving force of the product.

[0039] Furthermore, if Figure 4 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.

[0040] Alternatively, if Figures 1 to 4 As shown, the vibrator assembly also includes a mass block 31, and the mass block 31 has a vibrator cavity 32 penetrating along the first 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.

[0041] Furthermore, if Figures 1 to 4 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.

[0042] Embodiment 2:

[0043] The difference between this embodiment and the first embodiment is that: Figure 5 and Figure 6As shown, the moving magnet part also includes a reinforcing magnet 5 arranged on the side of the moving magnet 1 away from the stator assembly, the magnetizing direction of the reinforcing magnet 5 is parallel to the second direction, and the polarity of the end of the reinforcing magnet 5 close to the moving magnet 1 is opposite to the polarity of the end of the moving magnet 1 along the third direction.

[0044] The moving magnet adopts a multi-pole magnet. Along the sprinting direction, there is a non-magnetic area in the middle area of ​​the moving magnet. The reinforcing magnet 5 is located outside the non-magnetic area of ​​the moving magnet, which is just used to supplement the magnetic force at the non-magnetic area.

[0045] In this embodiment, there are two specific implementation methods for magnetizing each magnet. The first one is as follows: Figure 5 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 zone of one moving magnet 1, and the magnetizing directions of the two are opposite, and the magnetizing direction of the reinforcing magnet 5 points from the outside to the moving magnet 1; one magnetic zone 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, and the reinforcing magnet 5 enhances the magnetic field strength between the two adjacent closed magnetic circuits along the third direction. This structure can improve the utilization rate of magnetic flux lines, reduce leakage magnetism, and enhance the driving force of the product.

[0046] The second type Figure 6 As shown, the difference between this magnetization method and the first magnetization method is that the magnetization directions of all magnets are changed by 180°, and the magnetization directions of the two fixed magnets 2 are parallel to the third direction and both point from the outside to the iron core, which is the same as Figure 5 The magnetization directions are opposite, and the magnetization directions of the two fixed magnets 2 are opposite. The moving magnet 1 adopts a multi-pole magnetization magnet, and its magnetization direction points from the middle to the two ends. One fixed magnet 2 corresponds to one magnetic zone of a moving magnet 1, and the magnetization directions of the two are opposite. One magnetic zone of a 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 reinforcing magnet 5 enhances the magnetic field strength between the two adjacent closed magnetic circuits along the third direction. After the magnetization direction is adjusted, the magnetic field strength in the entire area is equivalent to that of the first magnetization method, and it also has the advantages of improving the utilization rate of magnetic flux lines, reducing leakage magnetic field, and enhancing the driving force of the product.

[0047] Embodiment three:

[0048] The difference between this embodiment and the first embodiment is that: Figure 7 and Figure 8As shown, the fixed magnet part includes a fixed magnet 2, and the fixed magnet 2 adopts a multi-pole magnetized magnet. The fixed magnet 2 is an integral structure and includes two magnetic regions distributed along the second direction. The magnetization directions of the two magnetic regions are opposite and parallel to the second direction, and the end polarity of the fixed magnet 2 along the second direction is opposite to the end polarity of the moving magnet 1 along the third direction.

[0049] Specifically, Figure 7 As shown, the fixed magnet 2 adopts a multi-pole magnetized magnet, the magnetizing direction of the fixed magnet 2 is parallel to the second direction, and the magnetizing direction of the fixed magnet 2 points from the middle to the moving magnets 1 on both sides. The moving magnet 1 adopts a multi-pole magnetized magnet, and its magnetizing direction points from both ends to the middle. A magnetic zone of the moving magnet 1 and the magnetic zone of the adjacent fixed magnet 2 form a closed magnetic loop, and the four magnetic zones of the two moving magnets 1 and the four magnetic zones of the two fixed magnets 2 form four closed magnetic loops in total. This structure can improve the utilization rate of magnetic flux lines, reduce leakage magnetism, and enhance the driving force of the product.

[0050] like Figure 8 As shown, the fixed magnet 2 adopts a multi-pole magnetized magnet, the magnetizing direction of the fixed magnet 2 is parallel to the second direction, and the magnetizing direction of the fixed magnet 2 points from both sides to the middle, and the moving magnet 1 adopts a multi-pole magnetized magnet, and its magnetizing direction points from the middle to both ends. A magnetic zone of the moving magnet 1 and the magnetic zone of the adjacent fixed magnet 2 form a closed magnetic loop, and the four magnetic zones of the two moving magnets 1 and the four magnetic zones of the two fixed magnets 2 form four closed magnetic loops in total. This structure can improve the utilization rate of magnetic flux lines, reduce leakage magnetism, and enhance product driving force.

[0051] Embodiment 4:

[0052] The difference between this embodiment and the third embodiment is that: Fig. 9 and Fig.10 As shown, a reinforcing magnet 5 is arranged outside the moving magnet 1, the magnetizing direction of the reinforcing magnet 5 is parallel to the second direction, and the polarity of the end of the reinforcing magnet 5 close to the moving magnet 1 is opposite to the polarity of the end of the moving magnet along the third direction.

[0053] The magnetizing direction of the reinforcing magnet 5 changes with the magnetizing directions of the moving magnet 1 and the fixed magnet 2. Fig. 9 In the embodiment, the magnetization direction of the reinforcing magnet 5 is from the outside to the moving magnet 1; Fig.10 In the embodiment, the magnetizing direction of the reinforcing magnet 5 is directed outward from the magnet 1 side; no matter which magnetizing method is used, the function of the reinforcing magnet 5 is to strengthen the magnetic field strength along the direction of the magnetic field.

[0054] As an application embodiment of the vibration device, an electronic device includes the vibration device described above.

[0055] 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.

[0056] 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.

[0057] exist Figures 2 to 10 In FIG. 4 , a specific implementation of the current direction of the coil 42 is shown, and the marking The symbol ⊙ represents the direction of current is perpendicular to the figure and inward, and the symbol ⊙ represents the direction of current is perpendicular to the figure and outward.

[0058] 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, and a fixed magnetic part is installed at at least one end of the iron core along the third direction, and the fixed magnetic part and the dynamic magnetic part form a magnetic circuit; The moving magnet part includes moving magnets respectively located on both sides of the stator assembly. The moving magnet is an integral structure 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.

2. The vibration device according to claim 1, characterized in that: The moving magnet part also includes a reinforcing magnet arranged on the side of the moving magnet away from the stator assembly, the magnetizing direction of the reinforcing magnet is parallel to the second direction, and the polarity of the end of the reinforcing magnet close to the moving magnet is opposite to the polarity of the end of the moving magnet along the third direction.

3. The vibration device according to claim 1 or 2, characterized in that: One fixed magnetic part is respectively provided at two ends of the iron core along the third direction.

4. The vibration device according to claim 3, characterized in that: The fixed magnet part includes a fixed magnet, the magnetizing direction of the fixed magnet is parallel to the third direction, the fixed magnet and a magnetic region of the adjacent moving magnet form a closed magnetic circuit, and the magnetizing direction of the fixed magnet is opposite to the magnetizing direction of the adjacent magnetic region.

5. The vibration device according to claim 3, characterized in that: The fixed magnet part includes a fixed magnet, which is an integrated structure and includes two magnetic regions distributed along the second direction. The magnetization directions of the two magnetic regions are opposite and parallel to the second direction. The end polarity of the fixed magnet along the second direction is opposite to the end polarity of the moving magnet along the third direction.

6. The vibration device according to claim 3, characterized in that: The length of the two moving magnets 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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