A vertical linear vibration motor

Abstract

The utility model relates to vibration motor technical field discloses a kind of vertical linear vibration motors, including the casing with containing space, flat plate type cover, stator assembly, vibrator assembly, elastic member and damping bubble cotton, casing includes arc bottom wall, from bottom wall bending extension forms two pairs of edge mutually parallel long side wall and short side wall;Stator assembly includes coil of inner embedded core and flexible circuit board;Vibrator assembly includes mass block and the permanent magnet embedded in mass block;The upper and lower sides of mass block are connected between long side wall by elastic member and are elastically suspended in containing space in vibrator assembly, the side wall surface of mass block corresponding bottom wall is arc-shaped arrangement, the other side wall surface of mass block corresponding coil is recessed permanent magnet;Damping bubble cotton is bonded and fixed on the upper and lower sides of mass block through elastic member and is abutted with long side wall, optimizes the internal available containing space, effectively prevents polarization, improves the vibration performance of vibration motor.

Description

Technical Field

[0001] This utility model relates to the field of vibration motor technology, and in particular to a vertical linear vibration motor. Background Technology

[0002] With the gradual development of electronic product technology, vibration motors have become a common functional component in portable consumer electronics products, such as watches and wristbands, which generally use vibration motors for tactile feedback.

[0003] Existing vibration motors are mostly cylindrical or cuboid in shape, occupying a large space. They consist of a vibration component and a stator component. The vibration component is composed of a mass block, a permanent magnet, and a spring, while the stator component is composed of electrical connectors, damping, limit blocks, and coils. To enable the reciprocating motion of the vibration component, an electromagnetic interaction needs to be generated between the coil and the magnet. The changing electromagnetic field generated by the coil drives the vibration component to move. However, due to the structural limitations of electronic products such as watches or bracelets, the internal space utilization rate is low. Continuing to use the existing vibration motor shape would make assembly difficult. If the existing magnetic circuit structure is maintained, the internal space of the vibration motor will be insufficient, resulting in a reduction in magnetic field driving force and insufficient vibration.

[0004] Therefore, it is necessary to provide an overall shape and internal magnetic circuit structure for a vibration motor that can be adapted to the internal assembly space of a watch or bracelet, in order to improve the problems of space utilization and insufficient vibration in watches or bracelets. Summary of the Invention

[0005] The purpose of this utility model is to provide a vertical linear vibration motor with good space utilization and vibration performance. The specific technical solution is as follows:

[0006] A vertical linear vibration motor includes a housing with an accommodating space, a flat cover, a stator assembly, an oscillator assembly, an elastic element, and damping foam. The housing includes an arc-shaped bottom wall, and two parallel long and short side walls extending from the bottom wall. The stator assembly includes a coil with an embedded iron core and a flexible circuit board. The oscillator assembly includes a mass block and a permanent magnet embedded in the mass block. The upper and lower sides of the mass block are connected between the long side walls by the elastic element, and the oscillator assembly is elastically suspended within the accommodating space. One side wall surface of the mass block corresponding to the bottom wall is arc-shaped, and the permanent magnet is recessed on the other side wall surface of the mass block corresponding to the coil. The damping foam passes through the elastic element and is bonded and fixed to the upper and lower sides of the mass block and abuts against the long side wall.

[0007] Preferably, the mass block includes a first groove symmetrically recessed on its upper and lower surfaces, a first boss symmetrically protruding within the first groove, a second groove recessed at the center of the surface facing the cover, a third groove recessed at the center of the second groove, and a fourth groove symmetrically recessed at the two corners of the third groove; the first groove forms the second bosses on both sides of the short sidewall of the mass block; the second, third, and fourth grooves are connected; the permanent magnet is embedded in the third groove, and the upper and lower sides of the permanent magnet do not protrude from the first groove, and the long side of the permanent magnet facing the coil does not protrude from the second groove.

[0008] Preferably, the first boss extends along the long side wall and is disposed at the center of mass of the mass block, and the height of the first boss is greater than the height of the second boss.

[0009] Preferably, the protrusion heights of the mass blocks at both ends of the second groove along the long side are inconsistent.

[0010] Preferably, the damping foam is bonded and fixed to the first boss, and the area of ​​the damping foam is less than or equal to the area of ​​the first boss.

[0011] Preferably, the elastic element includes two inclined elastic arms and a fixing part connected to both ends of the elastic arms; a clearance groove is formed between the elastic arms and the fixing part; the upper and lower projected area of ​​the clearance groove is larger than the area of ​​the first boss; the damping foam is intermittently inserted through the clearance groove.

[0012] Preferably, the flexible circuit board includes an internal power terminal, an external power terminal, and a connecting portion bent and connected between the internal power terminal and the external power terminal; the internal power terminal, the iron core, and the coil are fixed on the cover; the connecting portion extends from the internal power terminal into the accommodating space and is simultaneously fixed to the outer surfaces of the long side wall and the short side wall.

[0013] Preferably, the housing is integrally stamped, and the first inner arc angle between the long side wall and the bottom wall on the side where the connecting part is bonded and fixed is smaller than the second inner arc angle between the long side wall and the bottom wall on the other side.

[0014] Preferably, the first outer arc angle and the second outer arc angle between the arc surface of the mass block and its upper and lower surfaces correspond to the first inner arc angle and the second inner arc angle of the shell, respectively.

[0015] Preferably, the gaps between the mass block and the bottom wall, the short side wall and the cover are equal and smaller than the gap between the mass block and the long side wall, and the gaps between the mass block and the long side wall are equal.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: the arc-shaped design of the shell optimizes the space utilization of the vibration motor; the upper and lower sides of the oscillator assembly are connected to elastic elements and damping foam bonded and fixed at the center of mass of the mass block, which can effectively prevent polarization; at the same time, the damping foam is located at the center of mass of the oscillator assembly and can pass through the elastic elements to abut against the shell, which makes the volume adjustment space of the damping foam large, which is more conducive to the adjustment of the motor vibration performance and ensures a stable vibration experience. Attached Figure Description

[0017] Figure 1 This is a 3D diagram of a vertical linear vibration motor.

[0018] Figure 2 yes Figure 1 Cross-sectional view of the YZ plane.

[0019] Figure 3 This is an exploded view of the structure of a vertical linear vibration motor.

[0020] Figure 4 It is a 3D view of the mass block.

[0021] Figure 5 This is a 3D view of the shell.

[0022] Figure 6 yes Figure 1 Cross-sectional view of the XY plane.

[0023] in:

[0024] 1-Shell; 10-Bottom wall; 11-Long side wall; 12-First connecting platform; 13-Second connecting platform; 14-Notch; R1'-First inner arc angle; R2'-Second inner arc angle; 2-Cover; 3-Stator assembly; 30-Flexible circuit board; 31-Coil; 32-Iron core; 300-External power terminal; 301-Internal power terminal; 302-Connecting part; 4-Vibrator assembly; 40-Mass block; 400-First groove; 401-First boss; 402-Second boss; 403-Second groove; 404-Third groove; 405-Fourth groove; 41-Permanent magnet; R1-First outer arc angle; R2-Second outer arc angle; 5-Elastic element; 50-Elastic arm; 51-Fixing part; 50-Allowing groove; 6-Damping foam. 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 vertical linear vibration motor, such as Figures 1 to 6 As shown, the device includes a housing 1 with a accommodating space (not shown), a flat cover 2, a stator assembly 3, a vibrator assembly 4, an elastic element 5, and damping foam 6. The housing 1 and cover 2 are fastened together to form a complete internal accommodating space for the vibration motor. The outer contour of the vibrator assembly 4 matches the outer contour of the housing 1. The vibrator assembly 4 is elastically supported within the accommodating space by the elastic element 5, which is fixedly connected at one end to the upper and lower sides of the vibrator assembly 4, and at the other end to the inner wall of the long side wall 11. The damping foam 6 is bonded and fixed to the upper and lower surfaces of the vibrator assembly 4 and passes through the elastic element 5 to abut against the housing 1. Preferably, in the accompanying drawings, the arrow direction X represents the horizontal long side direction, Y represents the horizontal short side direction, and Z represents the vertical direction, where Z represents the vibration direction of the vibration motor.

[0027] The housing 1 is formed by one-piece stamping, such as Figure 5 As shown, the housing includes an arc-shaped bottom wall 10, a long side wall 11 extending from the bottom wall 10 to form two parallel sides, and a short side wall (not shown). A first connecting platform 12 protrudes diagonally from the long side wall 11 toward the accommodating space. A second connecting platform 13 protrudes from the other end of the long side wall 11 of one side of the first connecting platform 12 toward the accommodating space. A notch 14 is provided at the free end of the long side wall 11 corresponding to the position of the second connecting platform 13. The bottom wall 10 and the long side wall 11 are formed by bending. The bending angle between the bottom wall 10 and the long side wall 11 on one side of the notch 14 is the second inner arc angle R2. The bending angle between the bottom wall 10 and the long side wall 11 on the other side is the first inner arc angle R1. The arc-shaped bottom wall 10 and the bending profile between the bottom wall 10 and the long side wall 11 on the XY and YZ planes of the housing 1 are adapted to the internal space of the electronic device, thereby improving the space utilization rate of the vibration motor in the electronic device.

[0028] The stator assembly 3 includes a coil 31 with an embedded iron core 32 and a flexible circuit board 30. The flexible circuit board 30 includes an external power terminal 300, an internal power terminal 301, and a connecting portion 302 bent between the internal power terminal 301 and the external power terminal 300. The iron core 32 is magnetized by the coil 31 after being energized, forming an excitation force with the poles of the permanent magnet 41, further ensuring the vibration performance of the motor. The internal power terminal 301 is electrically connected to the coil 31, and the external power terminal 300 extends into an accommodating space and is electrically connected to an external power source (not shown). The internal power terminal 301, the iron core 32, and the coil 31 are fixed to the inner surface of the cover 2. The connecting portion 302 extends from the internal power terminal 301 into an accommodating space and is simultaneously fixed to the outer surface of the long side wall 11 and the adjacent short side wall. The L-shaped connector 302 is bonded and fixed on both sides to ensure the stability of the connection between the flexible circuit board 30 and the housing 1 and to ensure good power connection performance of the vibration motor. Preferably, the first inner arc angle R1 between the long side wall 11 and the bottom wall 10 on the side where the connector 302 is bonded and fixed is smaller than the second inner arc angle R2 between the long side wall 11 and the bottom wall 10 on the other side, so as to adapt to the installation space of the electronic device and optimize the internal space utilization of the electronic device. The connector 302 extends from the internal power connection end 301, passes through the notch 14 to create an accommodating space, and is bent and bonded to the outer surface of the second connecting platform 13 to optimize the Z-axis installation space of the vibration motor in the electronic device. At the same time, the connector 302 is bent and bonded again to the outer surface of the adjacent short side wall of the second connecting platform 13 to adapt to the power connection requirements of the electronic device.

[0029] The oscillator assembly 4 includes a mass block 40 and a permanent magnet 41 embedded in the mass block 40. The upper and lower sides of the mass block 40 are connected between the long side walls 11 by elastic members 5, which elastically suspend the oscillator assembly 4 within the accommodating space. One side wall surface of the mass block 40 corresponding to the bottom wall 10 is set as an arc-shaped wall (not shown), and the permanent magnet 41 is recessed on the other side wall surface of the mass block 40 corresponding to the coil 31. The mass block 40 is as follows: Figure 4As shown, the device is integrally cast and includes a first groove 400 symmetrically recessed in the X direction on its upper and lower surfaces, a first boss 401 symmetrically protruding in the X direction within the first groove 400, a second boss 402 formed by the first groove 400 corresponding to the short sidewalls of the shell 1 on both sides of the mass block 40, a second groove 403 recessed in the X direction at the center of the surface facing the cover 2, a third groove 404 recessed in the center of the second groove 403, and a fourth groove 405 symmetrically recessed at the two corners of the third groove 404. The height of the first boss 401 is greater than the height of the second boss 402 to ensure or adjust the mass of the mass block 40. The first boss 401 extends along the long sidewall 11 and is located at the center of mass of the mass block 40, thereby ensuring the vibration amount required by the oscillator assembly 4. The second groove 403, the third groove 404, and the fourth groove 405 are connected to the coil 31. During the reciprocating motion of the oscillator assembly 4, the second groove 403 is used to make way for the stator assembly 3 and the permanent magnet 41. The permanent magnet 41 is embedded in the third groove 404 and spaced apart from the side of the coil 31. Specifically, the upper and lower sides of the permanent magnet 41 do not protrude from the first groove 400, and the long side of the permanent magnet 41 facing the coil 31 does not protrude from the second groove 403, so as to ensure that the permanent magnet 41 will not collide with the stator assembly 3 and the elastic element 5 during the reciprocating motion of the oscillator assembly 4. The fourth groove 405 is used to accommodate glue (not shown) to ensure that the permanent magnet 41 is more firmly bonded and fixed in the third groove 404. Preferably, the arc-shaped wall of the mass block 40 and its upper and lower surfaces are respectively set as the first inner arc R1 and the second inner arc angle R2 corresponding to the housing 1, which are set as the first outer arc angle R1' and the second outer arc angle R2', so as to ensure that the mass block 40 will not collide with the housing during the reciprocating motion of the oscillator assembly 4, thereby optimizing the vibration performance of the motor. At the same time, the protrusion height of the mass block 40 at both ends of the second groove 403 along the long side is not consistent, with one end facing the connecting part 302 being lower than the other end to make way for the internal electrical terminal 301. Figure 2 and Figure 6 As shown, the gaps between the mass block 40 and the bottom wall 10, the short side wall, and the cover 2 are equal and smaller than the gap between the mass block 40 and the long side wall 11. The gaps between the mass block 40 and the long side wall 11 are equal, that is, the gap between the circumferential outer contour of the mass block 40 in the XY plane and the shell 1 is equal, and the gaps between the upper and lower surfaces of the first protrusion 401 of the mass block 40 and the shell 1 in the Z direction are equal. The gap between the mass block 40 and the shell 1 in the Z direction is greater than the gap between the circumferential outer contour of the mass block 40 in the XY plane and the shell 1. The first outer arc angle R1' and the second outer arc angle R2' of the mass block 40 correspond to the first inner arc angle R1 and the second inner arc angle R2 of the shell 1, respectively. This ensures that the oscillator assembly 4 will not collide with the shell 1 while reciprocating in the Z direction, thereby improving the vibration performance of the motor.

[0030] The elastic element 5 includes two inclined elastic arms 50 and a fixed part 51 connected to both ends of the elastic arms 50 and arranged in parallel. A clearance groove 500 is formed between the elastic arms 50 and the fixed part 51. The elastic element 5, which is fixedly connected to the upper and lower sides of the vibrator assembly 4, is arranged in parallel. One end of the fixed part 51 is connected to the second boss 402 of the mass block 40, and the other end of the fixed part 51 is connected to the first connecting platform 12 of the housing 1. The upper and lower projected area of ​​the clearance groove 500 is larger than the area of ​​the first boss 401. When the vibrator assembly 4 reciprocates up and down in the Z direction, it avoids the elastic arms 50 from hitting the first boss 401 and generating noise. The first grooves 400 on both sides of the first boss 401 are also used to make way for the elastic arms 50, thereby avoiding the reduction of the service life of the vibration motor due to the impact between the elastic element 5 and the mass block 40, thus ensuring the vibration performance of the motor.

[0031] Damping foam 6 is bonded and fixed to the surface of the first protrusion 401 on the upper and lower sides of the mass block 40, and passes through the elastic member 4 to abut against the long side wall 11. The area of ​​damping foam 6 is less than or equal to the area of ​​the first protrusion 401, so that damping foam 6 can be intermittently inserted into the clearance groove 500 to prevent the elastic arm 50 from hitting the damping foam 6 when the oscillator assembly 4 reciprocates up and down in the Z direction. Damping foam 6 is bonded and fixed at the center of mass of mass block 40, which can effectively prevent polarization of oscillator assembly 4. At the same time, the damping foam 6 is located at the center of mass of oscillator assembly 4 and can pass through the clearance groove 500 of elastic member 5 to abut against the housing 1, so that the volume adjustment space of damping foam 6 is large, which is more conducive to the adjustment of motor vibration performance and ensures a stable vibration experience.

[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 vertical linear vibration motor, comprising a housing with accommodating space, a flat cover, a stator assembly, an oscillator assembly, an elastic element, and damping foam, characterized in that, The housing includes an arc-shaped bottom wall, and two parallel long and short side walls extending from the bottom wall. The stator assembly includes a coil with an embedded iron core and a flexible circuit board. The oscillator assembly includes a mass block and a permanent magnet embedded in the mass block. The upper and lower sides of the mass block are connected between the long side walls by the elastic element, and the oscillator assembly is elastically suspended in the accommodating space. The surface of one side wall of the mass block corresponding to the bottom wall is arc-shaped, and the permanent magnet is recessed on the other side wall of the mass block corresponding to the coil. The damping foam passes through the elastic element and is bonded and fixed to the upper and lower sides of the mass block and abuts against the long side wall.

2. The vertical linear vibration motor according to claim 1, characterized in that, The mass block includes a first groove symmetrically recessed on its upper and lower surfaces, a first boss symmetrically protruding within the first groove, a second groove recessed at the center of the surface facing the cover, a third groove recessed at the center of the second groove, and a fourth groove symmetrically recessed at the two corners of the third groove; the first groove forms the second bosses on both sides of the short sidewall of the mass block; the second, third, and fourth grooves are connected; the permanent magnet is embedded in the third groove, and the upper and lower sides of the permanent magnet do not protrude from the first groove, and the long side of the permanent magnet facing the coil does not protrude from the second groove.

3. The vertical linear vibration motor according to claim 2, characterized in that, The first boss extends along the long side wall and is located at the center of mass of the mass block, and the height of the first boss is greater than the height of the second boss.

4. The vertical linear vibration motor according to claim 2, characterized in that, The protrusion heights of the mass blocks at both ends of the second groove along the long side are inconsistent.

5. The vertical linear vibration motor according to claim 3, characterized in that, The damping foams are respectively bonded and fixed to the first boss, and the area of ​​the damping foams is less than or equal to the area of ​​the first boss.

6. The vertical linear vibration motor according to claim 5, characterized in that, The elastic element includes two inclined elastic arms and a fixing part connected to both ends of the elastic arms; a clearance groove is formed between the elastic arms and the fixing part; the upper and lower projected area of ​​the clearance groove is larger than the area of ​​the first boss; the damping foam is intermittently inserted through the clearance groove.

7. The vertical linear vibration motor according to claim 1, characterized in that, The flexible circuit board includes an internal power terminal, an external power terminal, and a connecting portion that is bent and connected between the internal power terminal and the external power terminal; the internal power terminal, the iron core, and the coil are fixed on the cover; the connecting portion extends from the internal power terminal into the accommodating space and is simultaneously fixed to the outer surfaces of the long side wall and the short side wall.

8. The vertical linear vibration motor according to claim 7, characterized in that, The shell is integrally stamped, and the first inner arc angle between the long side wall and the bottom wall on the side where the connecting part is bonded and fixed is smaller than the second inner arc angle between the long side wall and the bottom wall on the other side.

9. The vertical linear vibration motor according to claim 8, characterized in that, The first and second outer arc angles between the arcuate surface of the mass block and its upper and lower surfaces correspond to the first and second inner arc angles of the shell, respectively.

10. The vertical linear vibration motor according to claim 8, characterized in that, The gaps between the mass block and the bottom wall, the short side wall and the cover are equal and smaller than the gap between the mass block and the long side wall, and the gaps between the mass block and the long side wall are equal.

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