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 particularly to a vibration motor having a coil as a stator structure.

Background Art

[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] Conventional vibration motors include a housing, a rotor, and a stator. The stator has a coil, the rotor is supported in the housing via a spring holder, the coil is welded and fixed to a circuit board, and the circuit board is usually provided with a notch through groove for retracting the lead wire of the coil. However, it is difficult to ensure the adhesion between the lead wire of the coil and the coil, and the lead wire of the coil may contact the cover plate of the housing. When the coil is damaged by pressure or impact force, the lead wire of the coil and the cover plate will be electrically connected, causing adverse effects.

[0004] Therefore, in order to solve the above technical problems, it is necessary to provide a new type of vibration motor.

Summary of the Invention

Problems to be Solved by the Invention

[0005] An object of the present invention is to provide a vibration motor with a stable structure.

Means for Solving the Problems

[0006] In order to achieve the above object, the technical concept of the present invention is as follows.

[0007] A vibrating motor, comprising a housing, a stator and a rotor mounted in the housing, and an elastic connecting member for suspending the rotor in the housing, wherein the stator comprises a circuit board fixed to the housing and having bonding pads, and a coil fixedly connected to the circuit board, the coil comprising a coil body and a lead wire extending from the coil body and welded and fixed to the bonding pad, the circuit board being provided with a recess for retracting the connection position between the lead wire and the coil body, and a back adhesive for isolating the lead wire from the housing being provided at the location of the recess.

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

[0009] Preferably, the back adhesive fills the recess.

[0010] Preferably, the lead wire includes an introducing lead wire and a leading-out lead wire, and the introducing lead wire and the leading-out lead wire are located on the same side of the coil.

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

[0012] Preferably, the housing is made of a metal material.

[0013] Preferably, the housing comprises a case and a cover plate provided to cover the case, and the stator is fixed to the cover plate.

Advantages of the Invention

[0014] Compared with the prior art, the vibration motor provided by the present invention includes a housing, a stator and a rotor attached to the housing, and an elastic connection member for suspending the rotor in the housing. The stator includes a circuit board fixed to the housing and having bonding pads, 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 and fixed to the bonding pad. The circuit board is provided with a recess for retreating the connection position between the lead wire and the coil body, and a back adhesive for isolating the lead wire from the housing is provided at the location of the recess. 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 recess location, prevent the coil from being damaged by pressure or impact force, and prevent the lead wire of the coil from being electrically connected to the housing, thereby preventing adverse effects.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Embodiments for Carrying out the Invention

[0016] Hereinafter, with reference to the drawings in the embodiments of the present invention, the technical concept in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained on the premise that those skilled in the art do not make creative efforts based on the embodiments of the present invention shall be included in the protection scope of the present invention.

[0017] As shown in FIGS. 1 to 6, the present invention provides a vibration motor 100 including a housing 1, a stator 2 mounted in the housing 1, a vibrator 3 for providing a vibration sensation, an elastic connection member 4 for suspending the vibrator 3 in the housing 1, and a back 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 formed to be fixed to surround a space for accommodating the stator 2 and the vibrator 3.

[0019] The stator 2 is fixed to the cover plate 12 and includes a circuit board 21 having bonding pads 211 and a coil 22 fixedly connected to the circuit board 21. A part of the circuit board 21 extends outside the housing 1. The coil 22 is fixed to the circuit board 21 and electrically connected to the circuit board 21 to pass an alternating current 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 and fixed to the bonding pad 211. The circuit board 21 is provided with a recessed portion 212 for retracting the connection position between the lead wire 222 and the coil body 221. The recessed portion 212 penetrates the circuit board 21, and a back adhesive 5 for isolating the lead wire 222 from the cover plate 12 is provided at the location of the recessed portion 212. Specifically, the back adhesive 5 is provided between the cover plate 12 and the circuit board 21. 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 recessed portion 212. In other embodiments, the back adhesive 5 may be provided only in the recessed portion 212. The lead wire 222 includes an introduction lead wire 223 and a lead-out lead wire 224. Preferably, the introduction lead wire 223 and the lead-out lead wire 224 are located on the same side of the coil 22 and are provided on the side close to the bonding pad 211 of the circuit board 21 of the coil 22. Thereby, the distance between the introduction lead wire 223 and the lead-out lead wire 224 is close, and the size and number of the recessed portions 212 can be limited. Preferably, for the convenience of manufacturing, only one recessed portion 212 with a small size needs to be provided.

[0021] Since it is difficult to ensure the adhesion between the lead wire 222 and the coil body 221 of the coil 22, the lead wire 222 of the coil 22 may contact the cover plate 12. At the same time, due to pressure or impact force, the coil 22 is likely to be damaged, and the lead wire 222 of the coil and the cover plate 12 may be electrically connected, which is likely to cause an adverse effect. The presence of the back adhesive 5 can completely isolate the cover plate 12 made of a metal material from the lead wire 222 of the coil 22 and eliminate this risk.

[0022] The vibrator 3 is suspended in the housing 1 via the elastic connection member 4. 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 alternating current is passed through the coil 22, an induced electromotive force is generated by cutting the magnetic flux lines of the magnet steel assembly 32, so that the magnet steel assembly 32 and the mass block 31 fixed thereto vibrate back and forth left and right, giving a motor vibration sensation.

[0024] The elastic connection member 4 elastically supports the vibrator 3. 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 applying 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 installed opposite to each other. Stoppers 62 are provided at 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 rotor attached to the housing, and an elastic connection member for suspending the rotor in the housing. The stator includes a circuit board fixed to the housing and having bonding pads, 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 and fixed to the bonding pad. A recessed portion for retracting the connection position between the lead wire and the coil body is provided on the circuit board, and a back adhesive for isolating the lead wire from the housing is provided at the location of the recessed portion. By adding the back adhesive at the recessed portion, the vibration motor of the present invention can isolate the lead wire of the coil from the housing, prevent the coil from being damaged by pressure or impact force, and prevent the lead wire of the coil from being electrically connected to the housing, thereby preventing adverse effects from occurring.

[0026] The above are only embodiments of the present invention. It should be pointed out here that those skilled in the art can also make improvements without departing from the creative idea of the present invention, and all these improvements are included in the protection scope of the present invention.

Claims

1. A vibrating motor comprising a housing, a stator and a vibrator mounted in the housing, and an elastic connection member for suspending the vibrator in the housing, wherein the stator includes a circuit board fixed to the housing and having bonding pads, and a coil fixedly connected to the circuit board, and the coil includes a coil body and a lead wire extending from the coil body and welded and fixed to the bonding pad. A back surface adhesive for bonding the circuit board and the housing is provided between the lower surface of the circuit board and the opposing surface of the housing opposing the lower surface of the circuit board. The circuit board is provided with a recess for retracting the connection position between the lead wire and the coil body, and a back surface adhesive for isolating the lead wire from the housing is provided at the location of the recess. In a plan view, the recess is a recess for exposing a part of the back surface adhesive, and the lead wire is provided directly above the exposed part of the back surface adhesive. A vibrating motor characterized by the above.

2. The lead wire includes an introducing lead wire and a leading-out lead wire, and the introducing lead wire and the leading-out lead wire are located on the same side of the coil. The vibrating motor according to claim 1, characterized by the above.

3. The back surface adhesive covers the entire projection of the circuit board on the housing. The vibrating motor according to claim 1, characterized by the above.

4. The housing is made of a metal material. The vibrating motor according to claim 1, characterized by the above.

5. The housing includes a case and a cover plate provided to cover the case, and the stator is fixed to the cover plate. The vibrating motor according to claim 1, characterized by the above.

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