A vertical linear vibration motor

Abstract

The utility model discloses a perpendicular linear vibration motor, including shell, stator subassembly, rotor subassembly and the elastic piece of symmetry connection in the upper and lower two side surfaces of rotor subassembly, the shell includes upper end cover, cylindrical frame body and lower end cover, and the upper end cover and lower end cover buckle in the both ends of frame body form the containing space, stator subassembly includes the flexible circuit board of fixed in lower end cover and the coil of adaptation with frame body inner wall, rotor subassembly includes the cylindrical mass block of recessed circular mounting groove in the center and the permanent magnet of embedding in mounting groove, one end of elastic piece is fixedly connected in the upper and lower two side surfaces of rotor subassembly respectively, and the other end is fixedly connected with the inner wall of upper end cover and lower end cover respectively, and rotor subassembly is elastically supported in containing space through elastic piece and is evenly spaced in the coil, and elastic piece is spiral corrugated spring of integrated stamping coiling, so that the response speed of linear vibration motor is faster and the vibration feeling is stronger.

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 development of electronic communication technology, portable electronic products, such as mobile phones, handheld game consoles, or handheld multimedia entertainment devices, have entered people's lives. These portable electronic products typically use vibration exciters for system feedback, such as incoming call notifications on mobile phones and vibration feedback from game consoles.

[0003] Existing linear vibration exciters mostly vibrate at a fixed frequency in a single direction and have a slow response speed, weak vibration sensation, and poor tactile feedback.

[0004] Therefore, it is necessary to provide a linear vibration motor with fast response speed and stronger vibration. Summary of the Invention

[0005] The purpose of this invention is to provide a vertical linear vibration motor with faster response speed and stronger vibration sensation. The specific technical solution is as follows:

[0006] A vertical linear vibration motor includes a housing, a stator assembly, a mover assembly, and elastic elements symmetrically connected to the upper and lower surfaces of the mover assembly. The housing includes an upper cover, a cylindrical frame, and a lower cover, which are fastened to the two ends of the frame to form an accommodating space. The stator assembly includes a flexible circuit board fixed to the lower cover and a coil adapted to the inner wall of the frame. The mover assembly includes a cylindrical mass block with a centrally recessed circular mounting groove and a permanent magnet embedded in the mounting groove. The elastic elements are integrally stamped and rolled helical corrugated springs, one end of which is fixedly connected to the upper and lower surfaces of the mover assembly, and the other end is fixedly connected to the inner walls of the upper and lower covers. The mover assembly is elastically supported vertically within the accommodating space by the elastic elements and is evenly spaced within the coil.

[0007] Preferably, the elastic element includes a connecting portion arranged parallel at its upper and lower ends and a corrugated elastic portion located between the connecting portions.

[0008] Preferably, the connecting portion is provided with at least two connecting holes at even intervals.

[0009] Preferably, the inner wall surfaces of the upper and lower end caps are fitted with a first fixing platform corresponding to the connecting hole.

[0010] Preferably, the upper and lower end faces of the mass block are fitted with a second fixing platform corresponding to the connecting hole.

[0011] Preferably, the flexible circuit board includes an internal power terminal and an external power terminal. The internal power terminal is adapted to the coil in a ring-shaped arrangement. The lower end face of the coil is electrically connected to the internal power terminal. The external power terminal extends from the frame into the accommodating space.

[0012] Furthermore, the moving part assembly also includes pole pieces, and the mass block, mounting groove, permanent magnet and pole pieces are arranged concentrically.

[0013] Furthermore, the lower end cover includes a circular body adapted to the frame and a support plate extending from the body; the inner wall surface of the body is provided with an annular groove, and the first fixing platform is located in the groove; the groove is adapted to the connecting part.

[0014] Preferably, the body and the upper cover are symmetrically arranged, and the body and the upper cover are also respectively provided with welding holes.

[0015] Furthermore, the upper cover and the frame are integrally formed.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting a helical corrugated elastic element that combines periodic corrugation and helical topology characteristics, the elastic element achieves the best balance between axial stiffness and radial flexibility. Compared with traditional helical springs, in the vertical linear vibration motor structure of this utility model, the elastic element can efficiently convert the driving force of the electromagnetic coil into axial motion. At the same time, the elastic deformation of the elastic part of the multi-layered corrugated helical structure with peaks to valleys absorbs lateral disturbances, enabling the mover assembly to quickly start and stop. When the vibration motor is subjected to impact load, the elastic part dissipates energy through local buckling, greatly reducing the resonance peak value, which is especially suitable for the application of linear vibration motors in tactile feedback scenarios with high-frequency vibration and high-speed response. Attached Figure Description

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

[0018] Figure 2 This is an exploded view of the structure of a vertical linear vibration motor.

[0019] Figure 3 This is an exploded view of the stator assembly and the lower end cover.

[0020] Figure 4 This is a front view of the elastic element.

[0021] Figure 5 This is an exploded view of the moving part's structure.

[0022] Figure 6 This is a cross-sectional view of a vertical linear vibration motor.

[0023] in:

[0024] 10-Frame; 11-Upper end cover; 12-Lower end cover; 100-First fixing platform; 120-Body body; 121-Groove; 122-Support part; 123-Welding hole; 2-Stator assembly; 20-Flexible circuit board; 21-Coil; 200-Internal power terminal; 201-External power terminal; 3-Motor assembly; 30-Mass block; 300-Second fixing platform; 301-Mounting groove; 31-Permanent magnet; 32-Pole sheet; 4-Elastic element; 40-Connecting part; 41-Elastic part; 400-Connecting hole. 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, not all embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not intended to limit the present utility model. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0026] The vertical linear vibration motor of the first embodiment of this utility model includes a housing (not shown) with an internal accommodating space, a stator assembly 2, a mover assembly 3, and elastic members 4 symmetrically connected to the upper and lower surfaces of the mover assembly 3. The housing includes an upper end cover 11, a cylindrical frame 10, and a lower end cover 12. The lower end cover 12 includes a circular body 120 adapted to the frame 10 and a support plate 122 extending from the body 120. The upper end cover 11 and the body 120 are symmetrically arranged and are fastened to both ends of the frame 10 to form an accommodating space. One end of the elastic member 4 is fixedly connected to the upper and lower surfaces of the mover assembly 3, and the other end is fixedly connected to the inner walls of the upper end cover 11 and the lower end cover 12, respectively. The mover assembly 3 is elastically supported in the accommodating space by the elastic members 4.

[0027] The stator assembly 2 includes a flexible circuit board 20 fixed on the lower end cover 12 and a coil 21 adapted to the inner wall of the frame 10. The flexible circuit board 20 includes an internal power terminal 200 and an external power terminal 201. The internal power terminal 200 is adapted to the coil 21 in a ring arrangement. The coil 21 is electrically connected to the internal power terminal 200. The external power terminal 201 extends from the frame 10 to accommodate an external power source (not shown). The internal power terminal 200 is fixed to the inner surface of the body 120 of the lower end cover 12, and the external power terminal 201 is fixed to the support plate 122 to ensure a stable external power supply.

[0028] The mover assembly 3 includes a cylindrical mass block 30 with a centrally recessed circular mounting groove 301 and a permanent magnet 31 embedded in the mounting groove 310. The mass block 30 is integrally die-cast. The mass block 30, the mounting groove 301, and the permanent magnet 31 are concentrically arranged, which effectively reduces the polarization of the mover assembly 3 during movement and ensures the stability of the vibration motor. In this embodiment, the coil 21 generates a magnetic field after being energized. This magnetic field interacts with the permanent magnet 31 to generate an electromagnetic force. The linear vibration motor drives the mover assembly 3 to reciprocate linearly within the vibration space between the upper end cover 11 and the lower end cover 12 through the electromagnetic force, and transmits vibration energy through the mass block 30. Preferably, the height of the coil 21 in the vibration direction is greater than the thickness of the permanent magnet 31, which enhances the magnetic field utilization efficiency, improves the electromagnetic force output and response speed, and significantly improves the vibration performance.

[0029] Elastic element 4 is a one-piece stamped and rolled spiral corrugated spring, such as Figure 4 As shown, the structure includes a connecting portion 40 arranged parallel at its upper and lower ends and a multi-layered corrugated elastic portion 41 located between the connecting portions 40. The connecting portion 40 is an annular flat plate with at least two connecting holes 400 evenly spaced circumferentially. Specifically, the inner walls of the upper end cover 11 and the lower end cover 12 are fitted with protruding first fixing platforms 100 corresponding to the connecting holes 400, and the upper and lower end faces of the mass block 30 are fitted with protruding second fixing platforms 300 corresponding to the connecting holes 400. The mover assembly 3, connected and fixed by the upper and lower elastic members 4, is evenly spaced within the annular coil 21. In this embodiment of the motor structure, the connecting portion 40 on one side, which is fixedly connected to the upper end cover 11 and the lower end cover 12 respectively, achieves pre-positioning of the two before welding by connecting the first fixing platform 100 through the connecting holes 400; the connecting portion 40 on the other side, which is fixedly connected to the mover assembly 3 respectively, achieves pre-positioning of the two before welding by connecting the second fixing platform 400 of the mass block 40 through the connecting holes 400.

[0030] The vertical linear vibration motor of the second embodiment of this utility model, such as Figure 3 As shown, based on the first embodiment, the mover assembly 3 also includes a pole piece 32, which is made of a high magnetic permeability material to concentrate the magnetic field lines, thereby effectively increasing the magnetic field strength and enhancing the vibration. The mass block 30, the mounting groove 301, the permanent magnet 31 and the pole piece 31 are concentrically arranged to ensure the vibration performance of the vibration motor.

[0031] The vertical linear vibration motor of the third embodiment of this utility model, such as Figure 5As shown, based on the first embodiment, the inner wall surfaces of the upper end cover 11 and the body 120 are respectively provided with annular grooves 121, and the first fixing platform 100 is located in the grooves 121. Specifically, the upper end cover 11 and the lower end cover 12 are integrally stamped. The grooves 121 are adapted to the connecting part 40 of the elastic member 4, further enhancing the positioning of the connecting part 4 with the upper end cover 11 and the lower end cover 12 respectively. At the same time, the setting of the grooves 121 effectively improves the space utilization rate of the vibration motor in the vibration direction.

[0032] The vertical linear vibration motor of the fourth embodiment of this utility model, such as Figure 1 and Figure 2 As shown, based on the first embodiment, the upper end cover 11 and the body 120 are also respectively provided with welding holes 123, and the elastic member 4 is welded and fixed to the upper end cover 11 and the lower end cover 12 through the welding holes 123.

[0033] The vertical linear vibration motor of the fifth embodiment of this utility model, such as Figure 1 and Figure 2 As shown, based on the first embodiment, the upper cover 11 and the frame 10 are integrally formed to reduce the welding process of the outer shell. The upper cover 11 and the frame 10 are integrally stamped to improve the stability of the vibration motor.

[0034] In the vertical linear vibration motor of this invention, the peak-to-valley superimposed elastic part 41 in the vibration direction space of its preset vibration amount is more conducive to space utilization. At the same time, by adjusting the peak height, width and number of superimposed layers of the elastic part 41, the spring stiffness can be flexibly controlled to adapt to the load requirements of different vibration motors, thereby realizing the preset load-bearing capacity of the elastic element 4. Compared with traditional helical springs, this invention, through the setting of the helical corrugated elastic part 41 with both periodic corrugation and helical topology characteristics, achieves the best balance between axial stiffness and radial flexibility of the elastic element 4. The elastic element 4 absorbs lateral disturbances through the elastic deformation of the multi-layer superimposed corrugated helical elastic part 41, while efficiently converting the electromagnetic driving force of the coil 21 into the axial driving force of the mover assembly 3, enabling the mover assembly 3 to quickly complete the start and stop, improving the response speed. When the vibration motor is subjected to impact load, the elastic part 41 dissipates energy through local buckling, greatly reducing the resonance peak value, effectively absorbing vibration and impact energy, reducing noise, especially meeting the application of linear vibration motors in high-frequency vibration tactile feedback scenarios, giving consumers a stronger vibration experience.

[0035] 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.

[0036] 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, a stator assembly, a mover assembly, and elastic members symmetrically connected to the upper and lower surfaces of the mover assembly, characterized in that, The outer casing includes an upper cover, a cylindrical frame, and a lower cover, which are fastened to the two ends of the frame to form an accommodating space. The stator assembly includes a flexible circuit board fixed on the lower cover and a coil adapted to the inner wall of the frame. The mover assembly includes a cylindrical mass block with a centrally recessed circular mounting groove and a permanent magnet embedded in the mounting groove. The elastic element is an integrally stamped and rolled helical corrugated spring, one end of which is fixedly connected to the upper and lower surfaces of the mover assembly, and the other end is fixedly connected to the inner walls of the upper and lower covers. The mover assembly is elastically supported vertically within the accommodating space by the elastic element and is evenly spaced within the coil.

2. The vertical linear vibration motor according to claim 1, characterized in that, The elastic element includes a connecting portion arranged parallel at both the upper and lower ends and a wave-shaped elastic portion located between the connecting portions.

3. The vertical linear vibration motor according to claim 2, characterized in that, The connecting part is provided with at least two connecting holes at even intervals.

4. The vertical linear vibration motor according to claim 3, characterized in that, The inner walls of the upper and lower end caps are fitted with a first fixing platform corresponding to the connecting hole.

5. The vertical linear vibration motor according to claim 3, characterized in that, The upper and lower end faces of the mass block are fitted with a second fixing platform corresponding to the connecting hole.

6. The vertical linear vibration motor according to claim 3, characterized in that, The flexible circuit board includes an internal power terminal and an external power terminal. The internal power terminal is adapted to the coil in a ring configuration. The lower end face of the coil is electrically connected to the internal power terminal. The external power terminal extends from the frame into the accommodating space.

7. The vertical linear vibration motor according to claim 1, characterized in that, The moving part assembly also includes pole pieces, and the mass block, mounting groove, permanent magnet and pole pieces are arranged concentrically.

8. The vertical linear vibration motor according to claim 4, characterized in that, The lower end cover includes a circular body adapted to the frame and a support plate extending from the body; the inner wall of the body is provided with an annular groove, and the first fixing platform is located in the groove; the groove is adapted to the connecting part.

9. The vertical linear vibration motor according to claim 8, characterized in that, The main body and the upper end cover are symmetrically arranged, and welding holes are also provided through the main body and the upper end cover respectively.

10. The vertical linear vibration motor according to claim 9, characterized in that, The upper cover and the frame are integrated into one piece.

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