Vibration apparatus and electronic device

Abstract

Disclosed are a vibration apparatus and an electronic device. The vibration apparatus comprises a vibrator assembly and a stator assembly. The vibrator assembly comprises a moving magnetic portion. The stator assembly comprises an iron core and a coil wound on the iron core. The vibrator assembly and the stator assembly are spaced apart in 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 provided with a fixed magnetic portion. The fixed magnetic portion and the moving magnetic portion form a magnetic circuit. The moving magnetic portion comprises moving magnets, and each moving magnet has two magnetic regions along the third direction, the two magnetic regions having opposite magnetization directions. The moving magnetic portion uses multi-pole magnetized magnets, thereby achieving a simple structure and optimizing production and manufacturing processes. The moving magnets and the fixed magnetic portion form four closed magnetic circuits passing through the coil, and the four closed magnetic circuits are located at four positions around the coil, thereby effectively reducing magnetic leakage of the product, improving the utilization rate of the magnetic field, and enhancing 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 cause 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: 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.

[0006] The moving magnet part comprises moving magnets located on both sides of the stator assembly, respectively, the moving magnets being of an integral structure and having two magnetic zones along the third direction, the two magnetic zones having opposite magnetization directions parallel to the third direction.

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

[0008] Optionally, the iron core is provided with one fixed magnet part at each end along the third direction.

[0009] Optionally, the magnet fixing part comprises a magnet fixing iron, the magnet fixing iron is magnetized in the third direction, and the magnet fixing iron and the magnetic area of the adjacent moving magnet form a closed magnetic circuit.

[0010] Optionally, the magnet fixing part comprises a magnet fixing iron, the magnet fixing iron is an integral structure and comprises two magnetic areas distributed along the second direction, the magnet fixing iron is magnetized in the second direction, and the magnet fixing iron and the magnetic area of the adjacent moving magnet form a closed magnetic circuit.

[0011] Optionally, the length of the moving magnet along the third direction is greater than the distance between the ends of the magnet fixing part away from the core.

[0012] Optionally, the vibrator assembly further comprises a mass block, the mass block has a vibrator cavity penetrating along the first direction perpendicular to the second direction and the third direction, the moving magnets are fixed in the vibrator cavity, and the stator assembly and the magnet fixing part are arranged in the vibrator cavity and between the moving magnets.

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

[0014] Optionally, the core comprises a core column for winding the coil, the core column is provided with a pole shoe at each end along the third direction, and the magnet fixing part is fixed to the side of the pole shoe away from the core column.

[0015] The application has the following beneficial effects:

[0016] The vibrator device 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 along the second direction, the vibrator assembly vibrates along the third direction perpendicular to the second direction, the axial direction of the core is parallel to the third direction, the magnet fixing part is arranged at least at one end of the core along the third direction, and the moving magnet part and the magnet fixing part form a magnetic circuit; the moving magnet part comprises a moving magnet, the moving magnet is an integral structure and has two magnetic areas along the third direction, and the two magnetic areas are magnetized in opposite directions; the moving magnet part adopts a multi-pole magnetized magnet, the structure is simple, and the production and manufacturing process is optimized; the moving magnet and the magnet fixing part form four closed magnetic circuits penetrating the coil, the four closed magnetic circuits are located at four positions of the coil, the magnetic flux leakage of the product is effectively reduced, the utilization rate of the magnetic field is improved, and the driving force of the product is improved.

[0017] The application solves the technical problem of providing an electronic device.

[0018] To solve the above technical problems, the technical scheme of the present application is: an electronic device comprising the vibration device as described above.

[0019] The vibration device is applied to the 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

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

[0021] Fig. 1 is an exploded view of the embodiment one of the present application;

[0022] Fig. 2 is a cross-sectional view one of the embodiment one of the present application;

[0023] Fig. 3 is a magnetic flux distribution diagram of the embodiment one of the present application;

[0024] Fig. 4 is a cross-sectional view two of the embodiment one of the present application;

[0025] Fig. 5 is a cross-sectional view one of the embodiment two of the present application;

[0026] Fig. 6 is a cross-sectional view two of the embodiment two of the present application;

[0027] Fig. 7 is a cross-sectional view one of the embodiment three of the present application;

[0028] Fig. 8 is a cross-sectional view two of the embodiment three of the present application;

[0029] Fig. 9 is a cross-sectional view one of the embodiment four of the present application;

[0030] Fig. 10 is a cross-sectional view two of the embodiment four of the present application.

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

[0032] The present application will be further described below in conjunction with the drawings and examples. In the following detailed description, only certain exemplary embodiments of the present application are described by way of illustration. It is self-evident that those skilled in the art can make modifications to the described embodiments 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.

[0033] Example one:

[0034] As shown in Fig. 1, Fig. 2, Fig. 3 and Fig. 4, a vibrating device 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 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 in the third direction is provided with a fixed magnet part, the fixed magnet part and the moving magnet part form a magnetic circuit; the moving magnet part comprises two moving magnets 1, the two moving magnets 1 are respectively located on the two sides of the stator assembly, and a gap is left between the stator assembly and the moving magnet 1. The moving magnet 1 is a multi-pole magnetized magnet, the moving magnet 1 is an integral structure and has two magnetic regions in the third direction, the magnetization directions of the two magnetic regions are opposite and parallel to the third direction.

[0035] As a preferred mode, the core is provided with one fixed magnet part at each end in the third direction. The two fixed magnet parts can form a magnetic circuit with the moving magnet part at both ends.

[0036] The end of the two moving magnets 1 in the third direction extends to the two sides of the corresponding fixed magnet part, each fixed magnet part comprises one 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 in the third direction is greater than the distance between the ends of the two fixed magnet parts away from the core. There are two specific embodiments, in 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] Further, the fixed magnet part comprises one fixed magnet 2, the magnetization direction of the fixed magnet 2 is parallel to the third direction, the fixed magnet 2 and one magnetic region 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 region.

[0038] Further, as shown in Fig. 2 and Fig. 3, the magnetization directions of the two fixed magnets 2 are parallel to the third direction and point to the outside of the core, the magnetization directions of the two fixed magnets 2 are opposite, the moving magnet 1 is a multi-pole magnetized magnet, the magnetization directions of the moving magnet 1 point to the middle from both ends, one fixed magnet 2 corresponds to one magnetic region of one moving magnet 1, the magnetization directions of the two are opposite, one magnetic region of one moving magnet 1 and the corresponding adjacent fixed magnet 2 form a closed magnetic circuit, the magnetic field line distribution of the embodiment is shown in Fig. 3, 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 magnetic field line utilization rate, reduce the magnetic flux leakage, and improve the driving force of the product.

[0039] Further, as shown in FIG. 4, the magnetization directions of the two permanent 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 permanent magnets 2 are opposite, the moving magnet 1 is a multi-pole magnetization magnet, the magnetization direction of which points from the middle to the two ends, one magnetic zone of the moving magnet 1 corresponds to one permanent magnet 2, the magnetization directions of the two are opposite, one magnetic zone of the moving magnet 1 and the corresponding adjacent permanent magnet 2 form a closed magnetic loop, four closed magnetic loops passing through the coil 42 are formed between the two moving magnets 1 and the two permanent magnets 2, the structure can improve the utilization rate of magnetic induction lines, reduce magnetic leakage, and improve the driving force of the product.

[0040] Optionally, as shown in FIGS. 1-4, the vibrator assembly further comprises a mass 31 having a vibrator cavity 32 penetrating in the first direction, the two moving magnets 1 are fixed in the vibrator cavity 32, and the stator assembly and the permanent magnet part extend into the vibrator cavity 32 and are located between the two moving magnets 1. There is a gap between the inner wall of the vibrator cavity 32 along the third direction and the adjacent permanent magnet part, that is, one side of the permanent magnet 2 is bonded to the core, and the other side of the permanent magnet 2 is away from the inner wall of the vibrator cavity 32, and the permanent 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 permanent magnet part.

[0041] Further, as shown in FIGS. 1-4, the core includes 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 permanent magnet part is fixed to the side of the pole shoe 43 away from the core column 41; generally, the permanent magnet 2 of the permanent magnet part is bonded to the pole shoe 43.

[0042] Embodiment Two:

[0043] The difference between this embodiment and Embodiment One is that, as shown in FIGS. 5 and 6, the moving magnet part further comprises a reinforcing magnet 5 arranged on the side of the moving magnet 1 away from the stator assembly, the magnetization 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 is a multi-pole magnetization magnet, and there is a magnetic-free zone in the middle region of the moving magnet along the sprint direction. The reinforcing magnet 5 is located outside the magnetic-free zone of the moving magnet, which is used to supplement the magnetic force at the position of the magnetic-free zone.

[0045] In the embodiment, the magnetization of each magnet has two specific implementations. The first one is shown in Fig. 5. The magnetization directions of the two permanent magnets 2 are parallel to the third direction and point outward from the core. The magnetization directions of the two permanent magnets 2 are opposite. The moving magnet 1 is a multi-pole magnetization magnet, and the magnetization direction thereof points from both ends to the middle. One magnetic region of the moving magnet 1 corresponds to one permanent magnet 2, and the magnetization directions thereof are opposite. The magnetization direction of the strengthening magnet 5 points from the outside to the moving magnet 1. One magnetic region of the moving magnet 1 forms a closed magnetic loop with the corresponding adjacent permanent magnet 2. Four closed magnetic loops pass through the coil 42 between the two moving magnets 1 and the two permanent magnets 2. The strengthening magnet 5 enhances the magnetic field strength between the two adjacent closed magnetic loops along the third direction. The structure can improve the magnetic flux utilization, reduce the magnetic flux leakage, and improve the driving force of the product.

[0046] The second one is shown in Fig. 6. The difference between the magnetization and the first one is that the magnetization directions of all the magnets are changed by 180°. The magnetization directions of the two permanent magnets 2 are parallel to the third direction and point outward from the core, which are opposite to the magnetization directions in Fig. 5. The magnetization directions of the two permanent magnets 2 are opposite. The moving magnet 1 is a multi-pole magnetization magnet, and the magnetization direction thereof points from the middle to both ends. One magnetic region of the moving magnet 1 corresponds to one permanent magnet 2, and the magnetization directions thereof are opposite. One magnetic region of the moving magnet 1 forms a closed magnetic loop with the corresponding adjacent permanent magnet 2. Four closed magnetic loops pass through the coil 42 between the two moving magnets 1 and the two permanent magnets 2. The strengthening magnet 5 enhances the magnetic field strength between the two adjacent closed magnetic loops along the third direction. After adjusting the magnetization direction, the magnetic field strength in the whole area is equivalent to that of the first magnetization, and the advantages of improving the magnetic flux utilization, reducing the magnetic flux leakage, and improving the driving force of the product are also achieved.

[0047] Embodiment three

[0048] The embodiment is different from the first embodiment in that, as shown in Figs. 7 and 8, the permanent magnet part includes one permanent magnet 2. The permanent magnet 2 is a multi-pole magnetization magnet. The permanent magnet 2 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 permanent magnet 2 along the second direction is opposite to the end polarity of the moving magnet 1 along the third direction.

[0049] Specifically, as shown in FIG. 7, the permanent magnet 2 is a multi-pole magnetization magnet, the magnetization direction of the permanent magnet 2 is parallel to the second direction, and the magnetization direction of the permanent magnet 2 points from the middle to both sides of the moving magnet 1, the moving magnet 1 is a multi-pole magnetization magnet, the magnetization direction of the moving magnet 1 points from both ends to the middle, one magnetic area of the moving magnet 1 and the magnetic area of the adjacent permanent magnet 2 form a closed magnetic loop, and four magnetic areas of the two moving magnets 1 and four magnetic areas of the two permanent magnets 2 form four closed magnetic loops. The structure can improve the magnetic flux utilization rate, reduce magnetic flux leakage, and improve the driving force of the product.

[0050] As shown in FIG. 8, the permanent magnet 2 is a multi-pole magnetization magnet, the magnetization direction of the permanent magnet 2 is parallel to the second direction, and the magnetization direction of the permanent magnet 2 points from both sides to the middle of the moving magnet 1, the moving magnet 1 is a multi-pole magnetization magnet, the magnetization direction of the moving magnet 1 points from the middle to both ends, one magnetic area of the moving magnet 1 and the magnetic area of the adjacent permanent magnet 2 form a closed magnetic loop, and four magnetic areas of the two moving magnets 1 and four magnetic areas of the two permanent magnets 2 form four closed magnetic loops. The structure can improve the magnetic flux utilization rate, reduce magnetic flux leakage, and improve the driving force of the product.

[0051] Embodiment four:

[0052] The difference between this embodiment and embodiment three is that, as shown in FIG. 9 and FIG. 10, a reinforcing magnet 5 is arranged on the outside of the moving magnet 1, the magnetization 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 magnetization direction of the reinforcing magnet 5 changes with the magnetization direction of the moving magnet 1 and the permanent magnet 2, in FIG. 9, the magnetization direction of the reinforcing magnet 5 points from the outside to the moving magnet 1, in FIG. 10, the magnetization direction of the reinforcing magnet 5 points from the moving magnet 1 side to the outside, no matter which magnetization mode, 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 comprises the vibration device described above.

[0055] The vibration device is applied to the 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 magnetic flux leakage, the driving force of the product of the electronic device is greatly improved, the performance of the electronic device is more excellent, 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 shown in the upper right corner of FIG. 1.

[0057] In Figs. 2 to 10, one embodiment of the current direction of the coil 42 is shown, indicated by The current direction is represented by a vertical plane inward, indicated by

[0058] 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-described embodiments, which are merely illustrative of the principles of the present application. Without departing from the spirit and scope of the present application, various changes and modifications can be made to the present application, and these changes and modifications fall within the scope of the present application claimed. The scope 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: the core has an axis 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; the moving magnet part comprises two moving magnets respectively located on two sides of the stator assembly, the moving magnets are of an integral structure and have two magnetic zones along the third direction, the two magnetic zones have opposite magnetization directions parallel to the third direction. The moving magnet part further comprises a reinforcing magnet arranged on a side of the moving magnets away from the stator assembly, the reinforcing magnet has a magnetization direction parallel to the second direction, an end of the reinforcing magnet close to the moving magnets has an opposite polarity to an end of the moving magnets along the third direction. The core has two ends along the third direction, each of which is provided with one fixed magnet part.

2. The vibration apparatus of claim 1, wherein: The fixed magnet part comprises one fixed magnet, the fixed magnet has a magnetization direction parallel to the third direction, the fixed magnet and one magnetic zone of the adjacent moving magnet form a closed magnetic circuit, the magnetization direction of the fixed magnet is opposite to that of the adjacent magnetic zone.

3. A vibration apparatus according to claim 1 or 2, characterised in that: The fixed magnet part comprises one fixed magnet, the fixed magnet is of an integral structure and comprises two magnetic zones distributed along the second direction, the two magnetic zones have opposite magnetization directions parallel to the second direction, an end of the fixed magnet along the second direction has an opposite polarity to an end of the moving magnet along the third direction.

4. The vibration apparatus of claim 3, wherein: The lengths of the two moving magnets along the third direction are greater than the distance between the ends of the two fixed magnet parts away from the core.

5. 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, the stator assembly and the fixed magnet part extend into the vibrator cavity and are located between the two moving magnets.

6. The vibration apparatus of claim 3, wherein: The inner wall of the vibrator cavity along the third direction has a groove opposite to the fixed magnet part.

7. The vibration apparatus of claim 1, wherein: The core comprises a core column for winding the coil, the core column has two pole pieces at two ends along the third direction, the fixed magnet part is fixed to the side of the pole piece away from the core column.

8. The vibration apparatus of claim 7, wherein: The vibration device comprises any one of claims 1-9.

9. The vibration apparatus of claim 1, wherein: ​ 10. An electronic device, comprising: ​

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