TWI441418B - Voice coil motor assembling fixture - Google Patents

Description

Voice coil motor assembly fixture

The invention relates to a voice coil motor assembly jig.

The voice coil motor is often used as a driving structure for the focus adjustment of the camera module, and mainly includes a voice coil motor frame, a magnet, a coil, a shrapnel and the like. Magnets are often placed around the frame to provide a magnetic field in the direction of the magnetic field from the center of the frame that interacts with the electromagnetic field generated by the energized solenoid to drive the lens or barrel.

After the voice coil motor is assembled, it is generally necessary to dispense the components. When dispensing the components of the voice coil motor, it is necessary to position each component first. However, the elastic force of the shrapnel of the voice coil motor is large, and it is difficult to fix it with the fixed cylinder. If the pressure is too small, it is difficult to mount the elastic piece on the opening of the fixed cylinder. If the force is too large, it may cause internal stress on the shrapnel and cause the voice coil motor to have excessive hysteresis, thus affecting the quality of the voice coil motor.

In view of the above, it is necessary to provide a voice coil motor assembly jig with adjustable pressure when assembling a voice coil motor.

A voice coil motor assembly jig includes a base, a slider, a spring, a fixing member and a magnetizer. The base includes a base and a mounting bracket disposed on the base for carrying the voice coil motor. The holder has a first through hole. The slider, the spring and the fixing member are sequentially sleeved on the magnetizer, and the spring is The two ends respectively abut against the slider and the fixing member, and the expansion and contraction of the spring changes the force of the slider acting on the voice coil motor. The slider is for contacting a voice coil motor carried on the holder. The first end of the guiding magnet away from the fixing member passes through the first through hole of the fixing frame and abuts against the base.

Compared with the prior art, the magnet of the voice coil motor assembly fixture is fixed to the holder by the first through hole of the fixing frame. The slider, the spring and the fixing member are sleeved from the bottom to the side of the magnetizer away from the holder. The expansion of the spring can drive the slider to move and apply a force to the voice coil motor. At the same time, the magnitude of the force applied to the voice coil motor is directly dependent on the spring force of the spring, and the spring force of the spring depends on the pressure below the fixture. Therefore, the amount of expansion and contraction of the spring can be changed by appropriately adjusting the pressure under the fixing member, thereby changing the force applied to the voice coil motor, so that the components of the voice coil motor are well positioned for dispensing. The process is carried out.

100‧‧‧ voice coil motor assembly fixture

10‧‧‧Base

20‧‧‧Bolt magnet

30‧‧‧ Slider

40‧‧‧ Spring

50‧‧‧Fixed parts

11‧‧‧Base

12‧‧‧ Fixing frame

110, 51‧‧‧ first surface

111‧‧‧ Groove

13‧‧‧Magnetic body

121‧‧‧First through hole

21‧‧‧ Limit ring

31‧‧‧Second through hole

32‧‧‧ bumps

52‧‧‧ second surface

53‧‧‧ third through hole

531‧‧‧ receiving hole

532‧‧‧through holes

533‧‧‧ interface

60‧‧‧ voice coil motor

61‧‧‧Fixed loading

62‧‧‧Shrap

1 is a structural exploded view of a voice coil motor assembly jig provided by an embodiment of the present invention.

2 is a schematic cross-sectional view of the voice coil motor assembly jig of FIG. 1.

3 is a schematic cross-sectional view showing the state of use of the voice coil motor assembly jig of FIG. 1.

The embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

Referring to FIGS. 1 and 2, a voice coil motor assembly jig 100 according to an embodiment of the present invention includes a base 10, a magnetizer 20, a slider 30, a spring 40, and a fixture 50.

The base 10 includes a base 11 and a mounting bracket 12.

The base 11 has a first surface 110, and the first surface 110 has a recess 111 in which a magnetic member 13 is disposed. Of course, the magnetic member 13 can also be located at other positions of the substrate 11.

The holder 12 is disposed on the first surface 110 of the base 11 for supporting the holder 12 of the voice coil motor. The holder 12 has a first through hole 121. The first through hole 121 has a quadrangular cross section, and the first through hole 121 is opposite to the magnetic member 13 . In the embodiment, the first through hole 121 is opposite to the groove 111 and penetrates the groove 111. Preferably, the first through hole 121 extends in a direction perpendicular to the first surface 110 of the base 11 . The holder 12 can be integrally formed with the base 11. Of course, the fixing frame 12 and the base 11 can also be fixed by other means, such as riveting, bonding, and the like.

In the embodiment, the magnetizer 20 has an elongated shape and a cross section thereof is a quadrilateral matching the first through hole 121. And one end of the magnetizer 20 is attracted to the magnetic member 13 disposed in the recess 111 through the first through hole 121 of the base 12 to fix the magnetizer 20 to the base 10. A limiting ring 21 is formed on the side wall of the magnetizer 20, and the limiting ring 21 is integrally formed with the magnetizer 20. Of course, the limiting ring 21 and the magnetizer 20 can be fixed by other means, such as riveting. Bonding, threaded connection, etc. The magnetizer 20 is made of a magnetically permeable material, such as a magnet or a ferrite material.

It can be understood that the cross section of the first through hole 121 and the magnetizer 20 may be other polygons, or a circle or the like as long as the shape of the first through hole 121 and the magnetizer 20 are matched. When the first through hole 121 and the magnetizer 20 are matched to each other, the magnetizer 20 can be prevented from rotating about its central axis, thereby ensuring operational stability.

The slider 30 has a second through hole 31 having a projection 32 on its inner wall. In the embodiment, the protrusion 32 is formed into a quadrilateral through hole, and the fourth is formed. The through-holes are sized to closely match the magnetizer 20. The slider 30 is sleeved on one end of the magnetizer 20 away from the holder 12 by the second through hole 31. The protrusion 32 of the inner wall of the slider 30 abuts against the limiting ring 21 of the side wall of the magnetizer 20 to prevent the slider 30 from slipping off. The slider 30 is generally made of a non-magnetic material. Preferably, the surface of the slider 30 is flat and smooth.

Of course, the protrusion 32 of the inner wall of the slider 30 can also be combined with other shapes. Preferably, the shape and size of the surrounding through hole are matched with the magnetizer 20, so that the magnetizer 20 can be used for the slider. The inside 30 is free to slide and the magnetizer 20 is prevented from rotating about its central axis. The spring 40 is sleeved on one end of the magnetizer 20 away from the holder 12, and one end of the spring 40 abuts against the protrusion 32 of the slider 30. Preferably, the spring 40 and the protrusion 32 are fixed to each other by bonding or the like.

The fixing member 50 has a first surface 51, a second surface 52 opposite to the first surface 51, and a third through hole 53 extending through the first surface 51 and the second surface 52. The third through hole 53 includes a receiving hole 531 and a through hole 532 penetrating the receiving hole 531 . The receiving hole 531 is disposed on the first surface 51 of the fixing member 50 and extends into the fixing member 50 . The through hole 532 is disposed on the second surface 52 of the fixing member 50 and extends into the fixing member 50 . The aperture of the receiving hole 531 is larger than the aperture of the through hole 532, so that an interface 533 is formed at the interface between the receiving hole 531 and the through hole 532.

The fixing member 50 is sleeved on one end of the magnetizer 20 away from the magnetic member 13 by the third through hole 533. The spring 40 is away from the one end of the slider 30 and abuts against the interface 533 formed at the interface between the receiving hole 531 and the through hole 532. Preferably, the end of the spring 40 is adhered to the interface 533. The fixing member 50 is generally made of a non-magnetic material.

Pressing the fixing member 50 can change the amount of expansion and contraction of the spring 40, thereby driving the slider 30 along The magnetizer 20 moves, thereby changing the force of the slider 30 on the voice coil motor.

In this embodiment, the magnetizer 20 is slidable in the third through hole 53 , and the end of the magnetizer 20 can pass through the third through hole 53 of the fixing member 50 . Preferably, the through hole 531 is shaped and sized to match the magnetizer 20 so that the magnetizer 20 can freely slide within the through hole 531, and the magnetizer 20 can be prevented from rotating about its central axis.

Referring to FIG. 3, a schematic diagram of the use state of the voice coil motor assembly jig 100 is shown. When assembling the voice coil motor using the voice coil motor assembly jig 100, first, the fixed cylinder 61 of the assembled voice coil motor 60 is placed at the end of the holder 12 of the base 10, and the elastic piece 62 is placed on the fixed portion. The opening of the cartridge 61. The slider 30, the spring 40 and the fixing member 50 are sequentially sleeved on one end of the magnetizer 20 away from the base 10. Since the side wall of the magnetizer 20 is provided with the limit ring 21, the slider 30 does not fall off from the magnetizer 20.

Then, one end of the magnetizer 20 away from the fixing member 50 passes through the first through hole 121 and is then adsorbed to the magnetic body 13 so that the magnetizer 20 can be well positioned.

Finally, according to the actual needs, the fixing member 50 is pressed by an appropriate amount of force to change the expansion and contraction amount of the spring 40 to adjust the elastic force of the spring 40, and the slider 30 is moved along the magnetizer 20 by the elastic force. The elastic piece 62 of the voice coil motor 60 is aligned and matched with the fixed barrel 61 under the force of the slider 30 to ensure the subsequent steps such as dispensing. The voice coil motor assembly jig 100 can effectively prevent the fixing cylinder 61 and the elastic piece 62 from being poorly positioned due to the excessive force applied to the elastic piece 62, or the excessive force of the voice coil motor 60 causes excessive hysteresis of the voice coil motor 60. And so on.

In the embodiment, the voice coil motor assembly jig 100 passes through the groove 111 of the base 10 The attraction of the magnetic body 13 to the magnetizer 20 allows the magnetizer 20 to be accurately and quickly positioned. The setting of the limiting ring 21 can position the slider 30 to prevent the slider 30 from falling off the magnetizer 20. At the same time, the magnitude of the force applied to the voice coil motor 60 is directly dependent on the amount of spring force of the spring 40, and the amount of spring force of the spring 40 depends on the pressure below the fixture 50. Therefore, the force applied to the elastic piece 62 of the voice coil motor 60 can be changed by appropriately adjusting the pressure under the fixing member 50, so that the elastic piece 62 is aligned with the fixed barrel 61 by an appropriate amount of force. And cooperated to ensure that the subsequent processes such as dispensing are performed, so that the force applied to the elastic piece 62 can be effectively prevented from being too small, and the fixed charging cylinder 61 and the elastic piece 62 are not positioned poorly, or the voice coil motor is excessively applied. 60 hysteresis is too large and so on.

It can be understood that the position of the limiting ring 21 on the side wall of the magnetizer 20 can be preset according to the voice coil motor 60 to be assembled.

In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the spirit of the invention are intended to be included within the scope of the following claims.

100‧‧‧ voice coil motor assembly fixture

10‧‧‧Base

20‧‧‧Bolt magnet

30‧‧‧ Slider

40‧‧‧ Spring

50‧‧‧Fixed parts

11‧‧‧Base

12‧‧‧ Fixing frame

110, 51‧‧‧ first surface

13‧‧‧Magnetic body

121‧‧‧First through hole

21‧‧‧ Limit ring

52‧‧‧ second surface

Claims (11)

A voice coil motor assembly jig includes a base, the base including a base and a fixing bracket disposed on the base for carrying the voice coil motor, wherein the fixing frame has a first through hole The voice coil motor assembly jig further includes: a slider, a spring, a fixing member and a magnetizer; the slider, the spring and the fixing member are sequentially sleeved on the magnetizer, and the two ends of the spring respectively abut against The slider and the fixing member, the expansion and contraction of the spring changes the force of the slider acting on the voice coil motor; the slider is in contact with the voice coil motor carried on the fixing frame; the guiding magnet is away from the fixing member One end of the holder passes through the first through hole of the holder and abuts against the base. The voice coil motor assembly jig according to claim 1, wherein a magnetic member is disposed in the base, and the magnetic member is opposite to the first through hole. The voice coil motor assembly jig according to claim 2, wherein the base has a first surface, the first surface has a groove opposite to the first through hole, and the magnetic member is disposed In the groove. The voice coil motor assembly jig according to claim 1, wherein the slider has a second through hole, the inner wall of the second through hole has a protrusion, and one end of the spring abuts against the protrusion . The voice coil motor assembly jig according to claim 1, wherein the magnetizer sidewall is provided with a limiting ring, and the limiting ring is located between the sliding block and the fixing frame, and the limiting ring is used. The slider that is sleeved on the side wall of the magnetizer is prevented from falling off. The voice coil motor assembly jig according to claim 1, wherein the fixing member has a first surface and a second surface opposite to the first surface, and the fixing member has a first through a third through hole of the surface and the second surface, the magnet can move freely through the third through hole and can pass through the third through hole. The voice coil motor assembly jig according to claim 6, wherein the third through hole includes a receiving hole disposed on the first surface and extending toward the fixing member, and a through hole extending through the receiving hole The through hole has a hole diameter larger than an aperture of the through hole, and an interface is formed between the receiving hole and the through hole, and the spring end is received at the receiving hole and abuts against the interface. The voice coil motor assembly jig according to claim 1 or 7, wherein the magnetizer has a polygonal cross section. The voice coil motor assembly jig according to claim 8, wherein the convex shape of the inner wall of the slider is matched with the shape and size of the magnetizer so that the magnetizer can be used for the slider. The inside slides freely and prevents the magnetizer from rotating about its central axis. The voice coil motor assembly jig according to claim 1, wherein the shape and size of the through hole are matched with the magnetic conductor so that the magnet can slide freely in the through hole and can be prevented. The magnetizer rotates about its central axis. The voice coil motor assembly jig according to claim 1, wherein the slider is made of a non-magnetic material.