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, a vibrator assembly, a stator assembly and an elastic piece, and is characterized in that the shell comprises a shell with an opening at one end and a cover body, the shell and the cover body are buckled to form an accommodating space, and the shell comprises a bottom wall and an annular side wall; the joint of the side wall and the cover body is coated with sealant; a first notch is formed in the free end edge of the side wall; the cover body comprises a circular body and a square supporting body extending from the body in parallel, the supporting body corresponds to the first notch and extends out of the side wall, and the periphery of the body and the edges of the two sides of the supporting body are bent in the same direction to form an integrated flange; the depth of the first notch is matched with the height of the flange; the height of the shell is set to be 1.35 + / -0.5 mm, and the diameter of the shell is set to be 4.0 + / -1 mm. The vertical linear vibration motor is high in structural stability, good in sealing performance and good in vibration performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to vibration motor technical field, especially a kind of vertical linear vibration motor. BACKGROUND

[0002] With the development of electronic technology, portable consumer electronics has gradually occupied global consumer market, such as mobile phone, palm game machine, multimedia entertainment equipment, etc., these electronic products generally use linear vibration motor to do tactile feedback, such as mobile phone incoming call prompt, game machine vibration feedback, etc. If to meet such extensive application, the miniaturization and vibration performance requirement of linear vibration motor is higher and higher.

[0003] The existing linear vibration motor generally includes shell, cover, vibrator, stator and spring, the shell and the cover are buckled and welded to form a containing space, the vibrator, the stator and the spring are placed in the containing space, the vibrator includes mass block and magnet, the stator assembly includes coil and circuit board of power supply coil, the existing linear vibration motor converts electric energy into linear motion mechanical energy, which makes the magnet move by repulsion or attraction of the coil to the magnet, thereby forming vibrator vibration, but the structure of the existing shell and cover buckling and welding leads to poor waterproof performance of linear vibration motor. Therefore, a vertical linear vibration motor with good sealing performance and high vibration performance is needed to solve the technical problems of the existing vibration motor. SUMMARY

[0004] The utility model aims at providing a kind of linear vibration motor with simple structure, good sealing performance and high vibration performance, and its specific technical scheme is as follows:

[0005] A vertical linear vibration motor includes a cylindrical shell, a vibrator assembly, a stator assembly and an elastic member. The shell includes a shell body with an open end and a cover. The shell body and the cover are buckled to form a containing space. The shell body includes a bottom wall and an annular side wall. The junction of the side wall and the cover is coated with sealing glue. A first notch is provided at the free end of the side wall. The cover includes a circular body and a square support body extending parallel from the body. The support body is correspondingly arranged with the first notch and protrudes outside the side wall. The periphery of the body and the two side edges of the support body are bent in the same direction to form an integral flange. The depth of the first notch is adapted to the height of the flange. The height of the shell is set to 1.35±0.5mm, and the diameter of the shell is set to 4.0±1mm.

[0006] Preferably, the stator assembly includes a coil and a flexible circuit board. The flexible circuit board includes an internal power terminal and an external power terminal. The internal power terminal is fixed on the body, and the external power terminal protrudes from the first notch and is fixed on the support body.

[0007] Preferably, the external power connection end is electrically connected with an external power supply line, and the first notch, the external power connection end and the external power supply line are fully covered by sealant.

[0008] Preferably, the free end inner wall surface of the side wall is concavely provided with a step portion, and the flange of the body is embedded in the step portion and fixed by welding.

[0009] Preferably, the joint between the flange and the step portion is coated with sealant.

[0010] Preferably, the free end edge of the side wall is further provided with a second notch, and the flange is correspondingly provided with a protrusion.

[0011] Preferably, the flange of the body is embedded in the side wall and fixed by welding; and the protrusion is embedded in the second notch and fixed by welding.

[0012] Preferably, the flange of the body is vertically bent to extend to form a ring-shaped connecting portion, and the free end of the side wall is embedded in the connecting portion and fixed by welding.

[0013] Preferably, the joint between the connecting portion and the side wall is coated with sealant.

[0014] Compared with the prior art, the vertical linear vibration motor has a simple structure, the edge of the cover body is matched with the shape of the shell, the welding stability of the shell and the cover body is ensured, sealant is coated at the joint between the shell and the cover body, the sealing performance of the whole vibration motor is improved, the vibration motor has good waterproof and dustproof functions, meanwhile, the flange designed at the periphery of the cover body can prevent the sealant from overflowing, and thus the vibration performance of the vibration motor is improved. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a perspective view of a vertical linear vibration motor of the first embodiment.

[0016] Figure 2 is a vertical sectional view of the first embodiment along the sealant and the center of the external power supply line. Figure 1

[0017] is an exploded view of the first embodiment. Figure 3 Figure 1 is a perspective view of a shell of the first embodiment.

[0018] Figure 4 is an assembled perspective view of the shell of the first embodiment.

[0019] Figure 5 is a perspective view of a cover body of the second embodiment.

[0020] Figure 6

[0021] ​​Figure 7 This is a perspective view of the outer casing assembly according to the second embodiment.

[0022] Figure 8 This is a perspective view of the cover in the third embodiment.

[0023] Figure 9 This is a perspective view of the assembly of the outer casing and the flexible circuit board according to the third embodiment.

[0024] in:

[0025] 1-Shell; 10-Bottom wall; 11-Side wall; 110-Step portion; 111-First notch; 112-Second notch;

[0026] 2-Cover; 20-Body; 21-Support; 22-Flange; 23-Protrusion; 24-Connecting part;

[0027] 3-Stator assembly; 30-Flexible circuit board; 31-Coil; 32-External power supply line; 301-Internal connection terminal;

[0028] 302 - External Connection Terminal;

[0029] 4-Oscillator assembly; 40-Mass block; 41-Pole plate; 42-Magnet; 43-Damper component;

[0030] 5-Elastic component;

[0031] 6,6'-Sealant. Detailed Implementation

[0032] 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.

[0033] The structure of a vertical linear vibration motor according to the first embodiment of this utility model is as follows: Figures 1 to 5As shown, including the shell of the cylinder (for mark), stator assembly 3, vibrator assembly 4 and elastic piece 5, the height of the shell is set to 1.35±0.5mm, the diameter of the shell is set to 4.0±1mm, the shell includes a shell 1 and cover 2 with one end opening (for mark), shell 1 and cover 2 buckle to form a containing space stator assembly fixed in the inner surface of the cover, the vibrator assembly 4 is connected to the inner wall of the shell through the elastic piece 5 and elastically suspended in the containing space, the stator assembly 3 is fixed on the inner surface of the cover 2, the vibrator assembly 4 and the stator assembly 3 are arranged in the upper and lower interval, wherein the elastic piece 5 is in the shape of a whole cone structure, including at least three spiral elastic arms (not marked), to realize the elastic piece 5 of the elastic reset function.

[0034] The shell 1 includes a circular bottom wall 10 and a ring-shaped side wall 11 vertically bent from the edge of the bottom wall 10, the free end inner wall surface of the side wall 11 is concave stepped portion 110, the free end edge of the side wall 11 is provided with a first notch 111, the joint of the side wall 11 and the cover 2 is coated with sealant 6'; the cover 2 includes a circular body 20 and a square support 21 extending parallel to the body 20, the support 21 is provided corresponding to the first notch 111 and protrudes outside the side wall 11, the periphery of the body 20 and the two side edges of the support 21 are bent in the same direction to form an integral flange 22, the flange 22 is bent towards the side of the shell 1 and is adapted to the side wall 11, that is, the outer diameter of the flange 22 is adapted to the inner diameter of the stepped portion 110, the flange 22 part of the body 20 is embedded in the stepped portion 110 and is welded and fixed, so as to realize the circumferential and vertical positioning of the cover 2 on the shell 1, which is conducive to the welding and fixing of the shell 1 and the cover 2 to form the shell, after the shell 1 and the cover 2 are welded and fixed, the joint of the flange 22 and the stepped portion 110 is coated with sealant 6', so as to ensure the sealing of the shell, so as to realize the waterproof and dustproof purpose of the vibration motor; the depth of the first notch 111 and the stepped portion 110 is consistent, the depth of the first notch 111 is adapted to the height of the flange 22, so as to ensure the stability of the adaptation of the shell 1 and the cover 2 in the circumferential and vertical directions.

[0035] The stator assembly 3 includes a flexible circuit board 30, a coil 31 and an external power line 32, the thickness of the flexible circuit board 30 is less than or equal to the height of the flange 22, the flexible circuit board 30 includes an internal electrical connection end 301 and an external electrical connection end 302, the internal electrical connection end 301 is fixed on the inner surface of the body 20, the coil 31 is fixed on the internal electrical connection end 301 and located in the containing space, the external electrical connection end 302 protrudes from the first notch 111 and is fixed on the support 21, the external electrical connection end 302 is electrically connected to the external power line 32, the external electrical connection end 302 and the external power line 32 are welded on the support 21, the positions of the first notch 110, the external electrical connection end 302 and the external power line 32 are covered with sealant 6, so as to prevent impurities from entering the containing space of the vibration motor through the first notch 110, so as to ensure the sealing between the shell 1 and the cover 2, so as to realize the waterproof and dustproof purpose of the vibration motor.

[0036] The vibrator assembly 4 is connected to the inner surface of the bottom wall 10 by the elastic member 5 and elastically suspended in the accommodating space, comprising a ring-shaped mass 40 with a circular through hole (not marked), a pole piece 41 arranged on the upper surface of the mass 40 and fully covering the through hole, and a magnet 42 fixed at the central position of the lower surface of the pole piece 41, the magnet 42 is located in the center of the through hole, the gap between the magnet 42 and the through hole is equal, the elastic member 5 is fixedly connected to the central position of the upper surface of the pole piece 41, so as to guarantee the balance of the vibrator assembly 3 during vibration, and the upper surface of the pole piece 42 is further provided with a damping member 43, so as to prevent the vibrator assembly 3 from colliding with the shell 1 and generating noise during vertical vibration, thereby guaranteeing the performance of the vibration motor. The vertical projection of the coil 31 is located in the gap between the magnet 42 and the through hole, the mass 40, the pole piece 41, the magnet 42 and the coil 31 are arranged in concentric circles, based on electromagnetic induction and magnetic field interaction, a uniform magnetic field is formed in the coil 31 by passing through direct current, the magnet 42 moves by the force induced by the magnetic field, when the magnet 42 is above the coil 31, the current direction is the same as the magnetic field direction, the magnet 42 will be subjected to a downward force; when the magnet 42 is below the coil 31, the current direction is opposite to the magnetic field direction, the magnet 42 will be subjected to an upward force, so that the mass 40 fixed with the magnet 42 moves up and down, the elastic force of the elastic member 5 is used for resetting the vibrator assembly 4, so as to make the vibrator assembly 3 generate vibration in the vertical direction.

[0037] The structure of a vertical linear vibration motor of the second embodiment of the utility model is as shown in Figure 6 and Figure 7As shown, as an alternative to the first embodiment, the outer diameter of the flange 22 is adapted to the inner diameter of the side wall 11, to achieve the circumferential and vertical positioning of the cover 2 on the shell 1, to ensure the stability of the shell welding fixation, the free end edge of the side wall 11 is further provided with a second notch 112, the corresponding peripheral edge of the flange 22 is provided with a protrusion 23, the second notch 112 is spaced apart from the first notch 111, the flange 22 of the body 20 is embedded in the side wall 11 and welded and fixed, the protrusion 23 is embedded in the second notch 112 and welded and fixed, the flange 22 of the support body 21 is adapted to the first notch 111, after the shell 1 and the cover 2 are welded and fixed, the joint between the flange 22 and the side wall 11 is coated with sealing glue (not shown), the joint between the protrusion 23 and the side wall 11 is coated with sealing glue (not shown), the positions of the first notch 110, the external power connection end 302 and the external power supply line 32 are all covered with sealing glue 6, to prevent impurities from entering the accommodation space of the vibration motor from the first notch 110 or the second notch 112, thereby ensuring the overall sealing of the shell, to achieve the purpose of waterproof and dustproof of the vibration motor. In the first embodiment and the second embodiment of the utility model, the flange 22 is recessed in the side wall 11, which can be used to accommodate the sealing glue at the joint between the flange 22 and the side wall 11 and prevent it from spreading and overflowing, wherein the sealing glue in the utility model can be a thermosetting glue or a UV glue.

[0038] The structure of the vertical linear vibration motor of the third embodiment of the utility model is shown in Figure 8 and Figure 9 As a third alternative, to achieve the circumferential and vertical positioning of the shell 1 and the cover 2, to ensure the stability of the shell welding fixation, the flange 22 of the body 20 is vertically bent and extended to form an annular connecting part 24, the inner diameter of the connecting part 24 is adapted to the outer diameter of the side wall 11, the free end of the side wall 11 is embedded in the connecting part 24 and welded and fixed, after the shell 1 and the cover 2 are welded and fixed, the joint between the free end edge of the connecting part 24 and the side wall 11 is coated with sealing glue (not shown), to ensure the sealing of the shell, the positions of the first notch 110, the external power connection end 302 and the external power supply line 32 are all covered with sealing glue 6, to prevent impurities from entering the accommodation space of the vibration motor from the first notch 110, thereby ensuring the overall sealing of the shell, to achieve the purpose of waterproof and dustproof of the vibration motor.

[0039] It should be noted that in the description of the utility model, the terms "upper", "lower", "front", "rear", "left", "horizontal direction", "vertical direction" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the devices or components referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.

[0040] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vertical linear vibration motor comprising a housing in the shape of a cylinder, a vibrator assembly, a stator assembly, and an elastic member, the housing comprising a casing having an open end and a cover, the casing and the cover being fastened to form a receiving space, the casing comprising a bottom wall and an annular side wall, characterized in that, The joint of the side wall and the cover is coated with sealant; the free end of the side wall is provided with a first notch; the cover comprises a circular body and a square support body extending from the body in parallel, the support body is provided corresponding to the first notch and protrudes outside the side wall, the periphery of the body and the two side edges of the support body are bent in the same direction to form an integral flange; the depth of the first notch is matched with the height of the flange; the height of the shell is set to 1.35±0.5mm, and the diameter of the shell is set to 4.0±1mm.

2. The vertical linear vibration motor according to claim 1, characterized by The stator assembly comprises a coil and a flexible circuit board, the flexible circuit board comprises an internal power connection end and an external power connection end, the internal power connection end is fixed on the body, and the external power connection end protrudes from the first notch and is fixed on the support body.

3. The vertical linear vibration motor according to claim 2, characterized by The external power connection end is electrically connected to an external power supply line, the first notch, the external power connection end and the external power supply line are fully covered with sealant.

4. The vertical linear vibration motor according to claim 3, characterized by The inner wall surface of the free end of the side wall is recessed with a step portion, the flange of the body is embedded in the step portion and is welded and fixed.

5. The vertical linear vibration motor according to claim 4, characterized by The joint of the flange and the step portion is coated with sealant.

6. The vertical linear vibration motor according to claim 3, wherein The free end of the side wall is further provided with a second notch, and the flange is adaptively provided with a protrusion corresponding to the second notch.

7. The vertical linear vibration motor according to claim 6, characterized by The flange of the body is embedded in the side wall and is welded and fixed.

8. The vertical linear vibration motor according to claim 3, characterized by The flange of the body is vertically bent and extended to form an annular connecting portion, and the free end of the side wall is embedded in the connecting portion and is welded and fixed.

9. The vertical linear vibration motor according to claim 8, characterized by The joint of the connecting portion and the side wall is coated with sealant. The joint of the connecting portion and the side wall is coated with sealant.

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