CN102035344A - Linear vibration motor and manufacturing method thereof - Google Patents

Abstract

The invention provides a linear vibrating motor, which includes a spring, a vibrator connected with the spring and a base for accommodating the spring and the vibrator, the spring is provided with a fixing part connected with the vibrator, and extends along the fixing part. The elastic arm and the joint part extending along the elastic arm and jointed to the base, the joint part is provided with a first surface close to the vibrator and a second surface opposite to the first surface, the second surface and the base The linear vibration motor further includes a blocking piece connected to the joint portion, and the blocking piece is placed on the first surface. The invention also includes a manufacturing method of the linear vibration motor. The linear vibrating motor of the present invention can make the product more reliable.

Description

Linear vibration motor and manufacturing method thereof

【Technical field】

The invention relates to a vibration motor, in particular to a flat linear vibration motor used in portable consumer electronic products.

【Background technique】

With the development of electronic technology, portable consumer electronic products are becoming more and more popular, such as mobile phones, handheld game consoles, navigation devices or handheld multimedia entertainment equipment, etc., generally use vibration motors for system feedback, such as mobile phone Incoming call prompts, information prompts, navigation prompts, vibration feedback of game consoles, etc. Such a wide range of applications requires high performance and long service life of the vibration motor.

At present, the vibration motor with more applications and better performance is a flat linear vibration motor. The linear vibration motor related to the utility model mainly includes a base with accommodating space, a coil on the base, and a coil connected to the base. The elastic support member, the vibrator composed of a counterweight and a permanent magnet suspended in the accommodation space by the elastic support member, the coil is located in the center below the permanent magnet, and both are accommodated in the accommodation space of the base. The end of the elastic support is fixed to the base by laser spot welding to support the reciprocating movement of the vibrator in the horizontal direction during operation. From a mechanical point of view, during the movement of the vibrator, stress concentration will occur at the spot welded part of the elastic support with the base, and the spot welding will cause certain damage to the raw material properties and structure of the elastic support, so it is very It is easy to break and cause the motor to fail.

Therefore, it is necessary to provide a new linear vibration motor.

【Content of invention】

The object of the present invention is to solve the problem of the stress concentration of the welding spot of the above structure, and provide a linear vibration motor that makes the product more reliable.

The technical solution of the present invention is as follows: a linear vibration motor, which includes a spring member, a vibrator connected with the spring member, and a base for accommodating the spring member and the vibrator, the spring member is provided with a fixing part connected with the vibrator, along The elastic arm extending from the fixing part and the joint part extending along the elastic arm and jointed to the base, the joint part is provided with a first surface close to the vibrator and a second surface opposite to the first surface, the second The surface is connected to the base, and the linear vibration motor further includes a blocking piece connected to the joint portion, and the blocking piece is placed on the first surface.

Preferably, the fixing part includes a first fixing part and a second fixing part, and the first fixing part and the second fixing part are perpendicular to each other.

Preferably, the joint portion is parallel to the second fixing portion.

Preferably, the elastic arm is provided with a middle part and a support part extending to both ends of the middle part in the same direction.

Preferably, the support part is provided with a hollow pattern.

Preferably, the base is provided with a protruding portion extending along the vibrator direction to fix the coil.

A method for manufacturing a linear vibration motor, comprising the following steps: providing a base; providing a circuit board, fixing the circuit board on the bottom of the base; providing a coil, storing the coil in the accommodation space of the base and electrically connecting the circuit board; Provide a baffle; provide a spring piece, the spring piece is provided with a fixed part, an elastic arm extending along the fixed part, and a joint part extending along the elastic arm; welding the baffle and the joint together by laser spot welding , form a whole; provide the vibrator; connect the vibrator with the fixed part of the spring part; weld the joint part of the spring part and the base together by laser spot welding; assemble the upper cover with the base.

Preferably, a spring member is provided with a first fixing portion and a second fixing portion extending along the first fixing portion, the first fixing portion and the second fixing portion are respectively connected to two adjacent side surfaces of the vibrator.

The beneficial effect of the present invention is that: firstly, a separate baffle and the spring part are welded together by laser spot welding to form a whole, and then the spring part with the baffle is welded to the base by laser spot welding. seat. When the motor vibrator is moving, the stress of the junction of the spring parts will be dispersed by the spot welding, thus protecting the solder joints, avoiding the impact of spot welding on the performance of the raw materials of the spring parts and the damage of the structure, making the motor more reliable during operation.

【Description of drawings】

Fig. 1 is a three-dimensional exploded view of an embodiment of a linear vibration motor of the present invention;

Fig. 2 is a partial structural perspective view of an embodiment of the linear vibration motor of the present invention;

Fig. 3 is a sectional view of an embodiment of the linear vibration motor of the present invention.

【Detailed ways】

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 1 to 3, it is a linear vibration motor according to an embodiment of the present invention, which includes a base 16, an upper cover 11 assembled with the base 16 to form an accommodation space, a coil 15 accommodated in the accommodation space, and a connecting The spring element 13 on the base 16 and the vibrator 12 suspended in the accommodation space by the spring element 13 . The vibration motor also includes a circuit board 17 fixed on the bottom of the base 16 , and the circuit board 17 is provided with a pad 170 electrically connected to the coil 15 .

The base 16 has a side wall 161 and a bottom wall 160 perpendicular to the side wall 161 . The bottom wall 160 is provided with a first through hole 162 at a central position. The coil 15 is fixed in the through hole 162 of the bottom wall 160 . The sidewall 161 is provided with a first welding point 610 for laser spot welding. The base 16 is also provided with a protruding portion 163 extending along the direction of the vibrator 12 , and the protruding portion 163 can limit the position of the coil 15 .

The vibrator 12 includes a counterweight 121 and a permanent magnet 120 , and the counterweight 121 is provided with a second through hole 201 so that the permanent magnet 141 is connected to the spring member 13 through the counterweight 121 and is suspended in the accommodation space by it. The coil 15 is located at the lower center of the permanent magnet 120 . There is a gap between the coil 15 and the permanent magnet 120 .

The spring member 13 is provided with a fixing part 130 connected with the vibrator 12, the fixing part 130 is divided into a first fixing part 301 and a second fixing part 302 extending along the first fixing part 301, the first fixing part 301 and the second fixing part 301 The two fixing portions 302 are perpendicular to each other, and are respectively connected to two adjacent side surfaces of the vibrator 12 . The spring member 13 further includes a U-shaped elastic arm 131 extending from the second fixing portion 302 , and a joint portion 132 extending from the end of the elastic arm 131 facing the second fixing portion 302 and parallel to the second fixing portion 302 , The engaging portion 132 is engaged with the base 16 . The elastic arm 131 has a U-shaped structure, which includes a middle part 1312 and a supporting part 1311 extending in the same direction to both ends of the middle part 1312. The supporting part 1311 is provided with a hollow pattern, and the U-shaped structure and the hollow pattern can increase spring strength. 13. Elasticity of the piece. The joint portion 132 is provided with a second welding spot 320 for laser spot welding corresponding to the first welding spot 610 on the side wall 161 of the base 16 .

In the linear vibration motor of the present utility model, it also includes a baffle 14 connected to the junction 132 of the spring member 13, and the baffle 14 can be larger than the junction 132, or smaller than the junction 132, or the same size as the junction 132 Equally, the blocking piece 14 can be square, also can be circular, or other shapes. The joint part 132 is provided with a first surface (not marked) close to the vibrator 12 and a second surface (not marked) opposite to the first surface, and the blocking piece 14 can be laser spot welded together with the first surface first, To form a whole, the spring element 13 with the blocking piece 14 is laser spot welded to the side wall 161 of the base 16 .

A method for manufacturing a linear vibration motor, comprising the following steps: providing a base 16; providing a circuit board 17, fixing the circuit board 17 on the bottom of the base 16; providing a coil 15, and accommodating the coil 15 in the accommodation space of the base 16 And be electrically connected with the circuit board 17; provide the blocking plate 14;

A spring member 13 is provided, and the spring member is provided with a fixing portion 130, an elastic arm 131 extending along the fixing portion 130, and an engaging portion 132 extending along the elastic arm 131, and the fixing portion 130 includes a first fixing portion 301 and a The second fixed part 302 extending from the first fixed part 301; the blocking plate 14 and the joint part 132 are welded together by laser spot welding to form a whole; the vibrator 12 is provided; the first fixed part 301 and the second fixed part 301 are respectively connected to two adjacent side surfaces of the vibrator 12; the joint portion 132 of the spring member 13 and the base 16 are welded together by laser spot welding; the upper cover 11 and the base 16 are assembled.

Firstly, the blocking piece 14 and the spring piece 13 are laser spot welded together to form a whole, and then the spring piece 13 with the blocking piece 14 is laser spot welded to the side wall 161 of the base 16 . When the motor vibrator is in motion, the stress of the junction 132 of the spring member 13 will be dispersed by the spot welding, thereby protecting the solder joints, avoiding the influence of spot welding on the performance of the raw material of the spring member 13 and the destruction of the structure, so that the motor is more reliable in operation.

What has been described above is only the embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, improvements can be made without departing from the creative concept of the present invention, but these all belong to the present invention. scope of protection.

Claims (8)

1. linear vibration electric motor, it comprises spring part, the oscillator that is connected with spring part and the pedestal of accommodating described spring part and oscillator, described spring part is provided with the fixed part that is connected with oscillator, along the extended elasticity arm of fixed part and extended and be engaged in the junction surface of pedestal along elasticity arm, described junction surface be provided with near the first surface of oscillator and with the first surface opposing second surface, described second surface is connected with pedestal, it is characterized in that: described linear vibration electric motor also comprises the catch that is connected with described junction surface, and described catch places on the first surface.

2. linear vibration electric motor according to claim 1, it is characterized in that: described fixed part comprises first fixed part and second fixed part that extends along first fixed part, described first fixed part is vertical mutually with second fixed part, and is connected to two adjacent sides of oscillator respectively.

3. linear vibration electric motor according to claim 2 is characterized in that: described junction surface is parallel with second fixed part.

4. linear vibration electric motor according to claim 1 is characterized in that: the support sector that described elasticity arm is provided with pars intermedia and extends in the same way to described pars intermedia two ends.

5. linear vibration electric motor according to claim 4 is characterized in that: described support sector is provided with the pattern of hollow out.

6. linear vibration electric motor according to claim 1 is characterized in that: described pedestal is provided with along the protuberance of the fixed coil of oscillator direction extension.

7. method of making linear vibration electric motor as claimed in claim 1 is characterized in that this method may further comprise the steps:

Pedestal is provided;

Wiring board is provided, wiring board is fixed on base bottom;

Coil is provided, coil is contained in the spatial accommodation of pedestal and and is electrically connected with wiring board;

Catch is provided;

Spring part is provided, and described spring part is provided with fixed part, along the extended elasticity arm of fixed part and along the extended junction surface of elasticity arm;

Utilize the method for laser spot welding to weld together catch and junction surface, form an integral body;

Oscillator is provided;

Oscillator is connected with the fixed part of spring part;

The method that the junction surface and the pedestal of spring part utilized laser spot welding welds together;

With loam cake and pedestal winding.

8. the method for manufacturing linear vibration electric motor according to claim 2, it is characterized in that: the spring part of second fixed part that is provided with first fixed part and extends along first fixed part is provided, and first fixed part is connected with two adjacent sides of oscillator respectively with second fixed part.

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