Vibration motor

Abstract

The present invention provides a vibration motor. [Solution] The motor includes a housing, a stator and a vibrator mounted in the housing, and an elastic connecting member that suspends the vibrator in the housing, the stator includes a circuit board that is fixed to the housing and has a bonding pad, and a coil that is fixedly connected to the circuit board, the coil includes a coil body and a lead wire that extends from the coil body and is welded to the bonding pad, the circuit board is provided with a retreat section that retreats the connection position between the lead wire and the coil body, and a backside adhesive is provided at the retreat section to isolate the lead wire and the housing. The vibration motor of the present invention isolates the coil lead wire and the housing by adding a backside adhesive at the retreat section, and can prevent the coil from being damaged by pressure or impact force, causing electrical conduction between the coil lead wire and the housing, causing adverse effects.

Description

[Technical field]

[0001] The present invention relates to the field of vibration motors, and in particular to vibration motors with a coil as a stator structure. [Background technology]

[0002] A vibration motor is a transmission device that directly converts electrical energy into mechanical energy of linear motion, without requiring any intermediate conversion mechanism.

[0003] A conventional vibration motor includes a housing, a vibrator, and a stator, the stator having a coil, the vibrator being supported in the housing via a spring holder, and the coil being welded and fixed to a circuit board. The circuit board is usually provided with a notched through groove to accommodate the coil lead wire. However, it is difficult to ensure close contact between the coil lead wire and the coil, and the coil lead wire may come into contact with the cover plate of the housing. If the coil is damaged by pressure or impact force, the coil lead wire will become conductive to the cover plate, causing adverse effects.

[0004] Therefore, there is a need to provide a new type of vibration motor to solve the above technical problems. Summary of the Invention [Problem to be solved by the invention]

[0005] An object of the present invention is to provide a vibration motor having a stable structure. [Means for solving the problem]

[0006] In order to achieve the above objectives, the technical ideas of the present invention are as follows:

[0007] A vibration motor comprising: a housing; a stator and a vibrator mounted within the housing; and an elastic connecting member that suspends the vibrator within the housing, wherein the stator comprises a circuit board fixed to the housing and having a bonding pad, and a coil fixedly connected to the circuit board, wherein the coil comprises a coil body and a lead wire extending from the coil body and welded to the bonding pad, wherein the circuit board is provided with a retreat portion for retreating a connection position between the lead wire and the coil body, and a back adhesive is provided at the retreat portion to isolate the lead wire from the housing.

[0008] Preferably, the backside adhesive is provided between the housing and the circuit board.

[0009] Preferably, the back surface adhesive fills the recessed portion.

[0010] Preferably, the leads include an in-lead and an out-lead, the in-lead and the out-lead being located on the same side of the coil.

[0011] Preferably, the backside adhesive covers the entire projection of the circuit board on the housing.

[0012] Preferably, the housing is made from a metallic material.

[0013] Preferably, the housing includes a case and a cover plate provided to cover the case, and the stator is fixed to the cover plate. Effect of the Invention

[0014] Compared with the prior art, the vibration motor provided by the present invention includes a housing, a stator and a vibrator attached to the housing, and an elastic connecting member that suspends the vibrator in the housing, the stator includes a circuit board fixed to the housing and having a bonding pad, and a coil fixedly connected to the circuit board, the coil includes a coil body and a lead wire extending from the coil body and welded to the bonding pad, the circuit board is provided with a retreat section for retreating the connection position between the lead wire and the coil body, and the retreat section is provided with a back adhesive for isolating the lead wire and the housing. The vibration motor of the present invention can isolate the lead wire of the coil from the housing by adding a back adhesive at the retreat section, and can prevent the coil from being damaged by pressure or impact force, which causes the lead wire of the coil to be conductive with the housing, causing adverse effects. [Brief description of the drawings]

[0015] [Figure 1] FIG. 1 is a perspective view of a vibration motor according to the present invention. [Diagram 2] FIG. 2 is a partial exploded view of the vibration motor shown in FIG. [Diagram 3] FIG. 3 is a perspective view of the cover plate and the stator in the vibration motor shown in FIG. [Figure 4] FIG. 4 is a partial exploded view of a cover plate and a stator in the vibration motor shown in FIG. [Diagram 5] FIG. 5 is an exploded view of a cover plate and a stator in the vibration motor shown in FIG. [Figure 6] FIG. 6 is a cross-sectional view taken along the line AA in FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The technical ideas in the embodiments of the present invention will be described below clearly and completely with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by those skilled in the art without making inventive efforts based on the embodiments of the present invention shall be included in the protection scope of the present invention.

[0017] As shown in Figures 1 to 6, the present invention provides a vibration motor 100 comprising a housing 1, a stator 2 mounted within the housing 1, a vibrator 3 that provides a vibration sensation, an elastic connecting member 4 that suspends the vibrator 3 within the housing 1, and a back surface adhesive 5 provided between the housing 1 and the stator 2.

[0018] The housing 1 is made of a metal material and includes a case 11 and a cover plate 12 provided to cover the case 11, and the stator 2 is fixed to the cover plate 12. The case 11 and the cover plate 12 are fixed together to form a space surrounding the stator 2 and the vibrator 3.

[0019] The stator 2 includes a circuit board 21 that is fixed to the cover plate 12 and has bonding pads 211, and a coil 22 that is fixedly connected to the circuit board 21, with a portion of the circuit board 21 extending outside the housing 1. The coil 22 is fixed to the circuit board 21 and electrically connected to the circuit board 21, causing an AC current to flow through the coil 22.

[0020] The coil 22 includes a coil body 221 and a lead wire 222 extending from the coil body 221 and welded to the bonding pad 211. The circuit board 21 is provided with a retreat portion 212 for retreating a connection position between the lead wire 222 and the coil body 221. The retreat portion 212 penetrates the circuit board 21. A back adhesive 5 is provided at the retreat portion 212 for isolating the lead wire 222 from the cover plate 12. Specifically, the back adhesive 5 is provided between the cover plate 12 and the circuit board 21, and the back adhesive 5 covers the entire projection of the circuit board 21 on the cover plate 12, that is, the area of ​​the back adhesive 5 is larger than the area of ​​the circuit board 21. Of course, the back adhesive 5 between the cover plate 12 and the circuit board 21 may further extend into the retreat portion 212. In another embodiment, the back adhesive 5 may be provided only in the retreat portion 212. The lead wire 222 includes an introduction lead wire 223 and an extraction lead wire 224, and preferably, the introduction lead wire 223 and the extraction lead wire 224 are located on the same side of the coil 22 and are provided on the side of the coil 22 closer to the bonding pad 211 of the circuit board 21, so that the distance between the introduction lead wire 223 and the extraction lead wire 224 is close, and the size and number of the evacuation portions 212 can be limited, and preferably, for convenience of manufacture, only one small-sized evacuation portion 212 is required.

[0021] Because it is difficult to ensure close contact between the lead wire 222 of the coil 22 and the coil body 221, the lead wire 222 of the coil 22 may come into contact with the cover plate 12, and at the same time, the coil 22 is easily damaged by pressure or impact force, and the lead wire 222 of the coil and the cover plate 12 become conductive, which is likely to cause adverse effects. The presence of the back adhesive 5 completely isolates the metallic cover plate 12 and the lead wire 222 of the coil 22, eliminating this risk.

[0022] The vibrator 3 is suspended in the housing 1 via the elastic connecting member 4, and the vibrator 3 vibrates left and right along the horizontal direction, so that the vibration motor 100 gives a vibration sensation. The vibrator 3 includes a mass block 31 and a magnet steel assembly 32 fixed in the mass block 31. The magnet steel assembly 32 is installed corresponding to the coil 22.

[0023] When an AC current is applied to the coil 22, the magnetic flux lines of the magnet steel assembly 32 are cut, generating an induced electromotive force, causing the magnet steel assembly 32 and the mass block 31 fixed thereto to vibrate back and forth from side to side, giving the sensation of motor vibration.

[0024] The elastic connection member 4 elastically supports the vibrator 3, and one end of the elastic connection member 4 is connected to the mass block 31 and the other end is connected to the case 11 via a soldering lug 61, thereby providing an elastic restoring force to the vibrator 3. The elastic connection member 4 is a V-shaped elastic sheet, and includes at least two plate-shaped elastic sheets 41 arranged opposite to each other, and stoppers 62 are provided on the opposite surface ends of the two elastic sheets 41. In this embodiment, the number of the elastic connection members 4 is two.

[0025] Compared with the prior art, the vibration motor provided by the present invention includes a housing, a stator and a vibrator attached to the housing, and an elastic connecting member that suspends the vibrator in the housing, the stator includes a circuit board fixed to the housing and having a bonding pad, and a coil fixedly connected to the circuit board, the coil includes a coil body and a lead wire extending from the coil body and welded to the bonding pad, the circuit board is provided with a retreat section for retreating the connection position between the lead wire and the coil body, and the retreat section is provided with a back adhesive for isolating the lead wire and the housing. The vibration motor of the present invention can isolate the lead wire of the coil from the housing by adding a back adhesive at the retreat section, and can prevent the coil from being damaged by pressure or impact force, which causes the lead wire of the coil to be conductive with the housing, causing adverse effects.

[0026] The above is merely an embodiment of the present invention, and it should be noted here that those skilled in the art may make modifications without departing from the creative idea of ​​the present invention, and all such modifications are within the scope of protection of the present invention.

Claims

1. A vibration motor including a housing, a stator and a vibrator mounted within the housing, and an elastic connecting member for suspending the vibrator within the housing, the stator including a circuit board fixed to the housing and having bonding pads, and a coil fixedly connected to the circuit board, the coil including a coil body and a lead wire extending from the coil body and welded to the bonding pad, The circuit board is provided with a retreat portion for retreating a connection position between the lead wire and the coil body, and a back surface adhesive is provided at the retreat portion to separate the lead wire from the housing. A vibration motor comprising:

2. The backside adhesive is provided between the housing and the circuit board.

2. The vibration motor according to claim 1 .

3. The back surface adhesive fills the recessed portion.

3. The vibration motor according to claim 1 or 2.

4. The lead wire includes an inlet lead wire and an outlet lead wire, the inlet lead wire and the outlet lead wire being located on the same side of the coil.

2. The vibration motor according to claim 1 .

5. The backside adhesive covers the entire projection of the circuit board on the housing.

2. The vibration motor according to claim 1 .

6. The housing is made of a metal material.

2. The vibration motor according to claim 1 .

7. The housing includes a case and a cover plate provided to cover the case, and the stator is fixed to the cover plate.

4. The vibration motor according to claim 3.

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