A horizontal linear vibration motor
Patent Information
- Application Number
- CN202522004231.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-18
- Publication Date
- 2026-09-18
- Estimated Expiration
- 2035-09-18
AI Technical Summary
[0003]现有水平线性振动电机通常为单线圈，其振动量的增强都是采用增加线圈厚度和加大磁钢等级来实现，但是这种方式会降低线圈的占空比，同时也对水平线性马达超薄型空间不利，所以在振动量要求较高的情况下，现有水平线性振动电机已经不能满足日益提高的要求
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: the upper and lower double coil structure works together with the two main driving force magnets in the middle to form a symmetrical magnetic field, which generates a linear thrust when energized. This structural design effectively reduces the stress load on the elastic element by enhancing the magnetic field strength and distribution uniformity, while improving the reliability and efficiency of the vibration system. In particular, the energizing current of the two coils is in the same direction, which can make full use of the magnetic fields on both sides of the two magnets, increasing the vibration amount of the motor and increasing the driving force without increasing the mass of the vibration part. The upper and lower surfaces of the mass block of the mover assembly are equipped with relief grooves to fully accommodate the stator assembly in its vibration direction, making the structure of the vibration motor compact, thereby effectively meeting the space requirements of the thin design of electronic products.
Smart Images
Figure CN224774781U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of vibration motor technology, and in particular to a horizontal linear vibration motor. Background Technology
[0002] With the development of communication technology, portable consumer electronics products have gradually occupied the global consumer market, such as mobile phones, smart wearables, handheld game consoles, and multimedia entertainment devices. These electronic products generally use vibration motors for haptic feedback, such as incoming call notifications on mobile phones and vibration feedback on game consoles. As consumer electronics products gradually develop towards ultra-thin designs and the demand for increasingly higher vibration sensitivity increases, this poses a severe challenge to the vibration design of existing vibration motors.
[0003] Existing horizontal linear vibration motors are usually single-coil motors. The increase in vibration intensity is achieved by increasing the coil thickness and the grade of magnets. However, this method reduces the duty cycle of the coil and is also detrimental to the ultra-thin design of horizontal linear motors. Therefore, existing horizontal linear vibration motors can no longer meet the increasingly demanding requirements when the vibration intensity is high.
[0004] Therefore, it is necessary to provide a new type of horizontal linear vibration motor that effectively utilizes the design space of electronic products to meet the requirements of consumer electronics for high driving force and compact structure of vibration motors. Utility Model Content
[0005] The purpose of this utility model is to provide a horizontal linear vibration motor with a large driving force and a compact structure. The specific technical solution is as follows:
[0006] A horizontal linear vibration motor includes a housing with a accommodating space, a stator assembly, a mover assembly, an elastic element, and a damping element located between the mover assembly and the elastic element. The stator assembly is fixed to the housing, and the mover assembly is elastically supported within the accommodating space by the elastic elements at both ends of the mover assembly connected to the housing. The stator assembly includes a first flexible circuit board, a second flexible circuit board, and a first coil and a second coil respectively fixed parallel to the opposite surfaces of the first and second flexible circuit boards. The mover assembly is parallel to and spaced between the first and second coils. The mover assembly includes a cuboid mass block and a permanent magnet. The upper and lower surfaces of the mass block are recessed with clearance grooves along the vibration direction of the mover assembly to avoid the stator assembly.
[0007] Preferably, the first and second flexible circuit boards each include first and second internal electrical terminals spaced apart and parallel to each other, and first and second connecting terminals formed by being integrally bent vertically from the same side of the first and second internal electrical terminals. The first and second internal electrical terminals each include first and second pads arranged in opposite directions. The first and second coils are respectively electrically connected to the first and second internal electrical terminals. The second flexible circuit board also includes an external electrical terminal extending out of the accommodating space. The external electrical terminal extends horizontally integrally from the second pad and extends out of the accommodating space.
[0008] Preferably, the clearance groove includes a first clearance groove symmetrically recessed at the center of the upper and lower surfaces of the mass block to avoid the first and second coils, a second clearance groove connected to the first clearance groove diagonally on both sides to avoid the first and second pads, and a third clearance groove connected to the second clearance groove on the side surface of the mass block facing the external power terminal to avoid the external power terminal.
[0009] Preferably, the first clearance groove extends through the width of the mass block, and the third clearance groove extends to the short sidewall of one diagonal side of the mass block; the depth of the first clearance groove is greater than the depth of the second clearance groove, and the depth of the second clearance groove is greater than the depth of the third clearance groove.
[0010] Preferably, the first clearance groove has an installation groove that penetrates the thickness of the mass block at its center; the upper and lower surfaces of the short sidewall on the opposite side of the mass block are symmetrically recessed with welding portions; and the surface of the short sidewall of the mass block adjacent to the welding portion is symmetrically recessed with grooves.
[0011] Preferably, the permanent magnet is embedded in the mounting groove; the spacing of the permanent magnet corresponds to that between the first and second coils.
[0012] Preferably, the moving part assembly further includes a magnetic guide sheet, which is fixed to the upper surface of the periphery of the first clearance groove and covers the permanent magnet.
[0013] Preferably, the housing includes an upper cover, a middle frame, and a lower cover. The moving part assembly is elastically supported within the accommodating space by elastic elements at both ends of it being connected to the inner wall of the middle frame. The first internal electrical terminal is fixed to the inner wall of the upper cover. The second internal electrical terminal is fixed to the lower cover. The first and second internal electrical terminals overlap and are fixed to the middle frame and electrically connected.
[0014] Preferably, the first and second connecting ends extend from the first and second internal electrical terminals into the accommodating space and are fixed to the outer wall of the middle frame.
[0015] Preferably, the lower cover is integrally provided with a horizontally extending support plate; the external power terminal is fixed on the support plate.
[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: the upper and lower double coil structure works together with the two main driving force magnets in the middle to form a symmetrical magnetic field, which generates a linear thrust when energized. This structural design effectively reduces the stress load on the elastic element by enhancing the magnetic field strength and distribution uniformity, while improving the reliability and efficiency of the vibration system. In particular, the energizing current of the two coils is in the same direction, which can make full use of the magnetic fields on both sides of the two magnets, increasing the vibration amount of the motor and increasing the driving force without increasing the mass of the vibration part. The upper and lower surfaces of the mass block of the mover assembly are equipped with relief grooves to fully accommodate the stator assembly in its vibration direction, making the structure of the vibration motor compact, thereby effectively meeting the space requirements of the thin design of electronic products. Attached Figure Description
[0017] Figure 1 This is a three-dimensional view of the motor assembly of this utility model.
[0018] Figure 2 This is an exploded view of the motor structure of this utility model.
[0019] Figure 3 It is a 3D view of the motor assembly with the casing removed.
[0020] Figure 4 This is an exploded view of the moving part component.
[0021] Figure 5 It is a 3D diagram of a mass block.
[0022] Figure 6 This is an exploded view of the stator assembly.
[0023] in:
[0024] 1-Housing; 10-Upper cover; 11-Lower cover; 12-Middle frame; 2-Stator assembly; 200-First flexible circuit board; 201-First internal power terminal; 202-First connection terminal; 203-First solder pad; 210-First flexible circuit board; 211-First internal power terminal; 212-First connection terminal; 213-First solder pad; 214-External power terminal; 21a-First coil; 21b-Second coil; 3-Motor assembly; 30-; 300-First clearance groove; 301-Mounting groove; 302-Second clearance groove; 303-Third clearance groove; 304-Groove; 305-Welding groove; 31-Permanent magnet; 31-Magnetic conductive sheet; 4-Elastic element; 5-Damping element. Detailed Implementation
[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0026] A horizontal linear vibration motor, such as Figures 1 to 6 As shown, the overall shape is cuboid, including a housing 1 with an accommodating space, a stator assembly 2, a mover assembly 3, an elastic element 4, and a damping element 6 located between the mover assembly and the elastic element. The stator assembly 2 is fixed to the housing 1, and the mover assembly 3 is elastically supported within the accommodating space by the elastic elements 4 connecting its two ends to the inner wall of the housing 1. The upper and lower surfaces of the mover assembly 3 are recessed along its vibration direction with clearance grooves (not shown) to avoid the stator assembly 2. This invention's horizontal linear vibration motor is mainly based on electromagnetic induction and magnetic field interaction. The stator assembly, when energized, generates a magnetic field that interacts with the mover assembly, producing a Lorentz force that propels the mover assembly to move linearly along its vibration direction.
[0027] The housing 1 includes an upper cover 10, a lower cover 11, and a middle frame 12. The lower cover 11 has a support plate (not shown) extending horizontally as an integral part. The upper cover 10, the lower cover 11, and the middle frame 12 are interlocked and welded together to form the accommodating space of the housing 1. Preferably, the upper cover 10, the lower cover 11, and the middle frame 12 are all integrally stamped. The middle frame 12 is formed by joining two symmetrical L-shaped frames to save costs and facilitate motor assembly.
[0028] The stator assembly 2 includes a first flexible circuit board 200, a second flexible circuit board 210, a first coil 21a, and a second coil 21b. The first flexible circuit board 200 and the second flexible circuit board 210 each include a first internal power terminal 201 and a second internal power terminal 211, as well as a first connecting terminal 202 and a second connecting terminal 212. The second flexible circuit board 210 also includes an external power terminal 214 extending into an accommodating space. The first internal power terminal 201 and the second internal power terminal 211 each include a first solder pad 203 and a second solder pad 213 arranged in opposite directions. Specifically, the first connecting terminal 202 and the second connecting terminal 212 are integrally and vertically bent from the first internal power terminal 201 and the second internal power terminal 211, respectively. The first solder pad 203 and the second solder pad 213 are integrally and horizontally extended from the first internal power terminal 201 and the second internal power terminal 211, respectively. Pad 203 and second pad 213 are used to solder the leads (not shown) of the first coil 21a and the second coil 21b to form an electrical connection; the external power terminal 214 extends horizontally integrally from the second pad 213 and provides an accommodating space. The external power terminal 214 is fixed on the support plate, thereby forming a first internal power terminal 201 and a second internal power terminal 211 that are arranged in parallel and spaced apart. The first internal power terminal 201 is fixed on the inner wall of the upper cover 10; the second internal power terminal 211 is fixed on the inner wall of the lower cover 11; the first connecting end 202 and the second connecting end 212 are overlapped and fixed on the middle frame 12 and electrically connected. The cross-section of the stator assembly 2 along the plane containing the short side of the mover assembly 3 is shaped like a "Π". The first coil 21a and the second coil 21b are electrically connected to the first internal power terminal 201 and the second internal power terminal 211, respectively; the mover assembly 3 is spaced between the first coil 21a and the second coil 21b. Preferably, the first connecting end 202 and the second connecting end 212 extend from the first internal power receiving end 201 and the second internal power receiving end 211 into the accommodating space and are fixed to the outer wall of the middle frame 12, which facilitates motor assembly.
[0029] The mover assembly 3 includes a cuboid mass block 30 and a permanent magnet 31. The upper and lower surfaces of the mass block 30 are recessed along the vibration direction of the mover assembly 3, providing clearance grooves (not shown) to accommodate the stator assembly 2. This ensures sufficient clearance for the stator assembly 2, resulting in a compact structure for the vibration motor and effectively meeting the space requirements of thin electronic product designs. The clearance grooves include a first clearance groove 300 symmetrically recessed at the center of the upper and lower surfaces of the mass block 30 to accommodate the first coil 21a and the second coil 21b; and a second clearance groove 302 recessed diagonally on both sides of the first clearance groove 300 to accommodate the soldering height of the leads of the first and second coils 21a and 21b on the first solder pad 203 and the second solder pad 213. A third clearance groove 303 is recessed on both sides of the second clearance groove 302 on the side of the mass block 30 facing the external power terminal 214 to accommodate the external power terminal 214. The first clearance groove 300 extends through the width of the mass block 30, and its width in the vibration direction is greater than [missing information]. The widths of the upper and lower first and second coils 21a and 21b are designed to adequately avoid collisions with the upper and lower first and second coils 21a and 21b during the reciprocating motion of the mover assembly 3. The second clearance groove 302 is used to avoid the lead welding heights of the first and second pads 203 and 213 to the corresponding first and second coils 21a and 21b. The welding height of the leads on the pads is less than the thickness of the coils; therefore, the depth of the second clearance groove 302 is less than the depth of the first clearance groove 300. Simultaneously, the width projection between the two second clearance grooves 302 on the same side of the mass block 30 is greater than that of the first and second coils 21a and 21b. The width projections of pads 203 and 213 are designed to fully avoid the lead welding positions of the first and second pads 203 and 213 with the first and second coils 21a and 21b, respectively, preventing the mass block 30 from impacting the welded leads during the reciprocating motion of the mover assembly 3 and affecting the electrical connection performance of the vibration motor. The third clearance groove 303 is used to avoid the external electrical connection terminal 214. Since the lead welding height on the first and second pads 203 and 213 is greater than the thickness of the second flexible circuit board 210, the depth of the second clearance groove 302 is greater than the depth of the third clearance groove 303. At the same time, the third clearance groove 303 extends to the short sidewall of the mass block 30 on one side to facilitate external connection. Electrical terminal 214 extends out of housing 1; under the premise of achieving optimal avoidance of stator assembly 2, the first clearance groove 300, the second clearance groove 302 and the third clearance groove 303 are arranged in a stepped manner to ensure that the mass of mass block 30 is not significantly reduced, thereby ensuring the vibration of mover assembly 3; the upper and lower surfaces of the short sidewall on the opposite side of mass block 30 are symmetrically recessed with welding parts 305 for welding and fixing to one end of elastic member 4. The recessed welding parts 305 can accommodate solder to prevent excessive solder from touching housing 1 and generating noise, thus affecting vibration performance; the surface of the short sidewall of mass block 30 adjacent to the welding part is symmetrically recessed with grooves 304 for installing damping member 5;A mounting groove 301 penetrating the thickness of the mass block 30 is provided at the center of the first clearance groove 300. The permanent magnet 31 is embedded in the mounting groove 301. The permanent magnets 31 are spaced between the first coil 21a and the second coil 21b. Specifically, there are two permanent magnets 31. This utility model uses the two middle main driving force permanent magnets 31 and the upper and lower first and second coils 21a and 21b to work together to form a symmetrical magnetic field. When energized, a linear thrust is generated. This structural design can enhance the magnetic field strength and distribution uniformity, effectively reduce the stress load on the elastic element, and improve the reliability and efficiency of the vibration system. In particular, the energizing current of the two coils is in the same direction, which can make full use of the magnetic fields on both sides of the two magnets. Without increasing the mass of the vibrating part, the vibration of the motor is increased and the driving force is increased. Preferably, the mover assembly 3 further includes a magnetic guide sheet 32. In this invention, the magnetic guide sheet 32 can be one or two pieces. The magnetic guide sheet 32 is fixed to the upper surface of the periphery of the first clearance groove 300 and covers the permanent magnet 31 to concentrate magnetic field energy and optimize the magnetic circuit, thereby improving the efficiency and stability of the vibration motor.
[0030] The elastic element 4 is V-shaped, and the openings (not shown) of the elastic elements 4 on both sides of the moving part 3 are arranged oppositely to ensure the stability of vibration. One free end of the elastic element 4 is welded and fixed to the welding part 305 of the mass block 30, and the other free end is welded and fixed to the middle frame 12, thereby elastically supporting the moving part 3 in the accommodating space and providing the rebound force for the vibration component 3 to reset.
[0031] The damping element 5 is bonded and fixed in the groove 304, located between the mass block 30 and the elastic element 4. The shapes of the two sides of the damping element 5 are adapted to the groove 304 and the elastic element 4, respectively. By absorbing the mechanical vibration energy generated during the operation of the moving part assembly 3, the vibration amplitude is reduced, thereby reducing noise pollution caused by vibration, preventing the elastic element 4 from undergoing inelastic deformation under high-frequency vibration, and avoiding the elastic element 4 from breaking or degrading due to long-term vibration. At the same time, the damping element 5 can suppress resonance peaks and adjust the vibration energy dissipation rate, preventing the motor from becoming unbalanced due to over-resonance or instantaneous impact, thereby ensuring the stability of vibration.
[0032] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "horizontal direction", "vertical direction", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.
[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A horizontal linear vibration motor, comprising a housing having a receiving space, a stator assembly, a mover assembly, an elastic element, and a damping element located between the mover assembly and the elastic element, wherein the stator assembly is fixed to the housing, and the mover assembly is elastically supported within the receiving space by elastic elements at both ends thereof connected to the housing, characterized in that, The stator assembly includes a first flexible circuit board, a second flexible circuit board, and a first coil and a second coil respectively fixed in parallel to the opposite surfaces of the first and second flexible circuit boards. The mover assembly is located parallel to and spaced between the first and second coils. The mover assembly includes a cuboid mass block and a permanent magnet embedded in the mass block. The upper and lower surfaces of the mass block are recessed with clearance grooves along the vibration direction of the mover assembly to avoid the stator assembly.
2. The horizontal linear vibration motor according to claim 1, characterized in that, The first and second flexible circuit boards each include first and second internal electrical terminals spaced apart and parallel to each other, and first and second connecting terminals formed by being integrally bent vertically from the same side of the first and second internal electrical terminals. The first and second internal electrical terminals each include first and second pads arranged in opposite directions. The first and second coils are respectively electrically connected to the first and second internal electrical terminals. The second flexible circuit board also includes an external electrical terminal extending out of the accommodating space. The external electrical terminal extends horizontally integrally from the second pad and extends out of the accommodating space.
3. The horizontal linear vibration motor according to claim 2, characterized in that, The clearance groove includes a first clearance groove symmetrically recessed at the center of the upper and lower surfaces of the mass block to avoid the first and second coils, a second clearance groove connected to the first clearance groove diagonally on both sides to avoid the first and second pads, and a third clearance groove connected to the second clearance groove on the side surface of the mass block facing the external power terminal to avoid the external power terminal.
4. The horizontal linear vibration motor according to claim 3, characterized in that, The first clearance groove extends through the width of the mass block, and the third clearance groove extends to the short sidewall of one diagonal side of the mass block; the depth of the first clearance groove is greater than the depth of the second clearance groove, and the depth of the second clearance groove is greater than the depth of the third clearance groove.
5. The horizontal linear vibration motor according to claim 4, characterized in that, The first clearance groove has an installation groove that penetrates the thickness of the mass block at its center; the upper and lower surfaces of the short sidewall on the opposite side of the mass block are symmetrically recessed with welding parts; and the surface of the short sidewall of the mass block adjacent to the welding part is symmetrically recessed with grooves.
6. The horizontal linear vibration motor according to claim 5, characterized in that, The permanent magnet is embedded in the mounting slot; the spacing of the permanent magnet corresponds to that between the first and second coils.
7. The horizontal linear vibration motor according to claim 6, characterized in that, The moving part assembly also includes a magnetic sheet, which is fixed to the upper surface of the periphery of the first clearance groove and covers the permanent magnet.
8. The horizontal linear vibration motor according to claim 6, characterized in that, The housing includes an upper cover, a middle frame, and a lower cover. The moving part assembly is elastically supported within the accommodating space by elastic elements at both ends of it being connected to the inner wall of the middle frame. The first internal power terminal is fixed to the inner wall of the upper cover. The second internal power terminal is fixed to the lower cover. The first and second internal power terminals overlap and are fixed to the middle frame and electrically connected.
9. The horizontal linear vibration motor according to claim 8, characterized in that, The first and second connecting ends extend from the first and second internal electrical terminals into the accommodating space and are fixed to the outer wall of the middle frame.
10. The horizontal linear vibration motor according to claim 8, characterized in that, The lower cover is integrally and horizontally extended with a support plate; the external power terminal is fixed on the support plate.