Vertical linear vibration motor

Abstract

The utility model relates to the technical field of vibration motors, and discloses a vertical linear vibration motor, which comprises a cylindrical shell with an opening at one end and a plate-shaped cover body, the shell and the cover body are buckled to form an accommodating space, the shell comprises a side wall, and the free end of the side wall is provided with a first notch; the side wall is vertical to the cover body; the cover body comprises a circular body, a supporting part extending from the body in parallel and an annular protruding part protruding from the inner surface, close to the periphery, of the body, the protruding part is provided with second notches corresponding to the first notches, the first notches are located on the outer sides of the second notches at intervals, the supporting part corresponds to the second notches, and the side wall is fixedly connected between the protruding part and the edge of the body. The maximum outer diameter of the side wall is equal to the outer diameter of the body, a gap is formed between the side wall and the convex part, and a first sealant part is coated in the gap. The vertical linear vibration motor is high in structural stability, good in sealing performance and good in vibration performance.

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 technology, portable consumer electronics products have gradually occupied the global consumer market, such as mobile phones, handheld game consoles, and multimedia entertainment devices. These electronic products generally use linear vibration motors for tactile feedback, such as incoming call notifications on mobile phones and vibration feedback on game consoles.

[0003] Existing vibration motors include a housing with a receiving space, the housing having an opening on one side and a cover plate covering the opening of the housing. The size of the cover plate coincides with the orthographic projection of the housing. The vibration motor is sealed by pressing and welding. However, the welding operation for sealing the vibration motor results in a weld seam between the cover plate and the housing, leading to poor sealing performance.

[0004] Therefore, there is an urgent need for a vertical linear vibration motor with good sealing performance and high vibration performance to solve the technical problems of existing vertical linear vibration motors. Summary of the Invention

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

[0006] A vertical linear vibration motor includes a cylindrical outer shell with one open end and a plate-shaped cover. The outer shell and the cover are fastened together to form an accommodating space. The outer shell includes a side wall, and a first notch is provided at the free end of the side wall. The side wall is perpendicular to the cover. The cover includes a circular main body, a support portion extending parallel to the main body, and an annular protrusion protruding from the inner surface of the main body near its periphery. A second notch is provided corresponding to the first notch, and the first notch is spaced outside the second notch. The support portion is provided corresponding to the second notch. The side wall is connected and fixed between the protrusion and the edge of the main body. The maximum outer diameter of the side wall is equal to the outer diameter of the main body. There is a gap between the side wall and the protrusion, and a first sealant portion is coated in the gap.

[0007] Preferably, the outer shell and the cover are integrally stamped.

[0008] Preferably, it also includes a stator assembly, which includes a flexible circuit board and a coil, the flexible circuit board including an internal power terminal and an external power terminal.

[0009] Preferably, the internal power terminal is fixed inside the ring of the protrusion, and the external power terminal extends from the first notch and the second notch and is fixed on the support.

[0010] Preferably, the height of the first notch is adapted to the thickness of the flexible circuit board.

[0011] Preferably, the first notch, the external electrical terminal, and the support portion fully cover the second sealant portion.

[0012] Preferably, the sidewall includes a first sidewall and a second sidewall that extends from the free end of the first sidewall.

[0013] Preferably, the first sidewall and the second sidewall are arranged in parallel; the outer diameter of the second sidewall is greater than the outer diameter of the first sidewall; the height of the second sidewall is greater than the height of the protrusion; and the outer diameter of the second sidewall is equal to the outer diameter of the main part.

[0014] Preferably, there is a gap between the second sidewall and the protrusion.

[0015] Preferably, the outer shell and the cover are integrally injection molded.

[0016] Compared with the prior art, this utility model provides a vertical linear vibration motor with a simple structure. The vertical linear vibration motor adapts the cover and the outer shell to ensure the welding stability of the outer shell and the cover. The sealant is applied at the joint between the outer shell and the cover. At the same time, by forming a gap between the annular protrusion on the inner surface of the cover and the side wall of the outer shell to accommodate the sealant, not only can the amount of sealant be increased, but also the sealant overflow can be prevented, thereby improving the overall sealing performance of the vertical linear vibration motor and thus improving the vibration performance of the vertical linear vibration motor. Attached Figure Description

[0017] Figure 1 This is an exploded structural diagram of the outer shell, cover, flexible circuit board, and sealant of the first embodiment.

[0018] Figure 2 This is a cross-sectional view of the vertical linear vibration motor according to the first embodiment.

[0019] Figure 3 This is an exploded structural diagram of the outer shell, cover, flexible circuit board, and sealant of the second embodiment.

[0020] Figure 4 This is a cross-sectional view of the vertical linear vibration motor according to the second embodiment.

[0021] in:

[0022] 1-Outer shell; 10-Side wall; 11-Notch; 100-Gap; 101-First side wall; 102-Second side wall; 2-Cover; 20-Main body; 21-Support part; 22-Protrusion; 30-Flexible circuit board; 31-Coil; 40-Mass block; 41-Electrode; 42-Magnet; 43-Damping element; 5-Elastic element; 6-First sealant part; 6'-Second sealant part. Detailed Implementation

[0023] 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.

[0024] The structure of a vertical linear vibration motor according to the first embodiment of this utility model is as follows: Figure 1 and Figure 2 As shown, the device includes a cylindrical outer shell 1 with one end open, a plate-shaped cover 2, a stator assembly, an oscillator assembly, and an elastic element 5. The outer shell 1 and the cover 2 are made of metal. The outer shell 1 and the cover 2 are fastened together to form an accommodating space. The stator assembly (not shown) is fixed to the inner surface of the cover. The oscillator assembly is connected to the inner wall of the outer shell through the elastic element 5 and is elastically suspended in the accommodating space. The oscillator assembly and the stator assembly are arranged at intervals. The elastic element 5 has a cone-shaped structure and includes at least three spiral elastic arms (not shown) to better realize the rebound and reset function of the elastic element 5 on the oscillator assembly.

[0025] The outer casing 1 includes a side wall 10, and a first notch 12 is provided at the free end of the side wall 10; the cover 2 includes a circular body 20, a support portion 21 extending parallel to the body 20, and an annular protrusion 22 protruding from the inner surface of the body 20 near the periphery. The protrusion 22 is provided with a second notch 23 corresponding to the first notch 12. The first notch 12 is located at a distance outside the second notch 23. The support portion 21 is provided with a corresponding second notch 23 to support the flexible circuit board 30 of the stator assembly for external power supply; the side wall 10 is connected and fixed between the protrusion 22 and the edge of the body 20. The maximum outer diameter of the side wall 10 is equal to the outer diameter of the body 20, which facilitates the fitting and fastening of the outer casing 1 and the cover 2. There is a gap 100 between the side wall 10 and the protrusion 22. The gap 100 is coated with a first sealant portion 6.

[0026] The stator assembly (not shown) includes a flexible circuit board 30 and a coil 31. The flexible circuit board 30 includes an internal power terminal (not shown) and an external power terminal (not shown). The internal power terminal is fixed within the ring of the protrusion 22, and the external power terminal extends from the second notch 23 and the first notch 12 and is fixed to the support portion 21. The height of the first notch 12 is adapted to the thickness of the flexible circuit board. The positions of the first notch 12, the external power terminal, and the support portion 21 completely cover the second sealant portion 6'.

[0027] The oscillator assembly (not shown) includes an annular mass block 40 with a circular perforation (not shown) in the center, an electrode plate 41 covering and fixed to the perforation, a magnet 42 fixed to the center of the lower surface of the electrode plate 41, and a damping element 43 fixed to the center of the upper surface of the electrode plate 41. The magnet 42 is cylindrical and is evenly spaced in the perforation. The coil 31 is located in the gap (not shown) between the magnet 42 and the inner wall of the perforation. The thickness of the coil 31 is less than the width of the gap, so that during the reciprocating motion of the oscillator assembly, the magnet 42 moves up and down in the inner ring of the coil 31, and the gap serves to allow the coil 31 to move. One end of the elastic element 5 is connected and fixed to the bottom surface of the inner wall of the outer shell 1, and the other end is connected and fixed to the electrode plate 41, thereby suspending the oscillator assembly in the accommodating space.

[0028] The assembled vertical linear vibration motor, based on electromagnetic induction and Lorentz's law, powers the coil 31 via an external power supply connected to the flexible circuit board 30, generating a magnetic field. This magnetic field interacts with the magnet 42 of the oscillator assembly, producing a force vector that drives the oscillator assembly in a reciprocating linear motion in the vertical direction. The mass block 40 oscillates during this reciprocating motion, allowing the user to experience vibration. In this embodiment, the outer shell 1 and the cover 2 are made of metal and are integrally stamped. The outer shell 1 and the cover 2 are first fixed by laser welding. The first sealant portion 6, located in the gap 100 between the side wall 10 and the protrusion 22, provides a seal. Simultaneously, the first sealant portion 6 and the second sealant portion 6 are integrally potted or coated, forming a fully enclosed state for the vertical linear vibration motor in this embodiment. This prevents impurities, water, or water vapor from entering the accommodating space of the vertical linear vibration motor from the joint between the outer shell 1 and the cover 2. Furthermore, this eliminates the need for a separate coating process, saving costs.

[0029] The structure of a vertical linear vibration motor according to the second embodiment of this utility model is as follows: Figure 3 He Ru Figure 4As shown, as an alternative to the first embodiment, the sidewall 10 includes a first sidewall 101 and a second sidewall 102 formed by bending and extending from the free end of the first sidewall 101. The second sidewall 102 is perpendicular to the cover 2, and the first sidewall 101 and the second sidewall 102 are arranged parallel to each other. The outer diameter of the second sidewall 102 is larger than the outer diameter of the first sidewall 101. The height of the second sidewall 102 is greater than the height of the protrusion 22. The outer diameter of the second sidewall 102 is equal to the outer diameter of the main body 20. There is a gap 100 between the second sidewall 102 and the protrusion 22. This embodiment can adapt to the installation space requirements of the terminal product and achieve miniaturization of the vertical linear vibration motor without reducing the amount of sealant. In this embodiment, the outer shell 1 and the cover 2 are made of plastic and are integrally injection molded. The outer shell 1 and the cover 2 are first fixed by ultrasonic welding.

[0030] The sealant in this invention can be thermosetting adhesive or UV adhesive, etc. If the end customer does not have high requirements for the stability of the vertical linear vibration motor in the end application of this invention, the outer shell 1 and the cover 2 can be directly connected and fixed by integral adhesive application, so as to save the assembly process of the vertical linear vibration motor and save costs.

[0031] 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.

[0032] 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 cylindrical housing with one open end and a plate-shaped cover, wherein the housing and cover are fastened together to form an accommodating space, characterized in that, The outer casing includes a sidewall, the free end of which has a first notch; the sidewall is perpendicular to the cover; the cover includes a circular main body, a support portion extending parallel to the main body, and an annular protrusion protruding from the inner surface of the main body near its periphery; the protrusion has a second notch corresponding to the first notch, the first notch being spaced outside the second notch; the support portion is correspondingly disposed to the second notch; the sidewall is connected and fixed between the protrusion and the edge of the main body; the maximum outer diameter of the sidewall is equal to the outer diameter of the main body; there is a gap between the sidewall and the protrusion; a first sealant portion is coated in the gap.

2. The vertical linear vibration motor according to claim 1, characterized in that, The outer shell and the cover are integrally stamped.

3. The vertical linear vibration motor according to claim 1, characterized in that, It also includes a stator assembly, which includes a flexible circuit board and coils, the flexible circuit board including internal power terminals and external power terminals.

4. The vertical linear vibration motor according to claim 3, characterized in that, The internal power terminal is fixed inside the ring of the protrusion, and the external power terminal extends from the first notch and the second notch and is fixed on the support.

5. The vertical linear vibration motor according to claim 4, characterized in that, The height of the first notch is adapted to the thickness of the flexible circuit board.

6. The vertical linear vibration motor according to claim 5, characterized in that, The first notch, the external power terminal, and the support portion completely cover the second sealant portion.

7. The vertical linear vibration motor according to claim 1, characterized in that, The sidewall includes a first sidewall and a second sidewall that extends from the free end of the first sidewall.

8. The vertical linear vibration motor according to claim 7, characterized in that, The first sidewall and the second sidewall are arranged in parallel; the outer diameter of the second sidewall is greater than the outer diameter of the first sidewall; the height of the second sidewall is greater than the height of the protrusion; the outer diameter of the second sidewall is equal to the outer diameter of the main part.

9. The vertical linear vibration motor according to claim 7, characterized in that, There is a gap between the second sidewall and the protrusion.

10. The vertical linear vibration motor according to claim 7, characterized in that, The outer shell and the cover are integrally injection molded.

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