Classifications

• • G—PHYSICS
  • G02—OPTICS
  • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
  • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
  • G02B27/62—Optical apparatus specially adapted for adjusting optical elements during the assembly of optical systems

Definitions

• the present invention relates to the field of micro-motors, and in particular to a method and an assembly method for tilting angle of a voice coil motor.
• the voice coil motor is a micro-motor widely used in camera modules of electronic equipment to drive the lens to focus.
• the voice coil motor inevitably has assembly errors, or errors in the design of each component, so that a certain inclination angle is generated between the carrier and the base, and the presence of the inclination angle may reduce the resolution of the edge of the camera module. That is, the camera module is not clearly shot.
• the present invention provides a tilt angle adjustment method and an assembly method for a voice coil motor.
• the tilt angle adjustment method can adjust the tilt angle caused by the assembly error and the design error in the manufacturing process of the ordinary voice coil motor, is simple and effective, and does not need to change the internal structure of the existing voice coil motor.
• a method for adjusting the inclination of a voice coil motor includes the following steps:
• step 1 Providing a reclining seat and a gasket, wherein the reclining seat includes a base and a spherical plunger disposed in the base and movable up and down relative to the base, the spherical plunger being hollow a structure having an opening at the top of the spherical surface; the spacer having a through hole;
• Step 2 adsorbing the gasket on the base of the reclining seat, and the spherical jack passes through the through hole thereof;
• Step 3 coating a layer of adhesive on the surface of the gasket
• Step 4 Adjusting the spherical ejector to a suitable height, and placing a voice coil motor on the spherical surface of the spherical ram to contact the voice coil motor with the glue;
• Step 5 Adjust the angle of the voice coil motor so that the optical axis of the voice coil motor is perpendicular to the spacer;
• Step 6 Curing the adhesive between the gasket and the voice coil motor.
• step 5 includes:
• Step 5.1 installing a mirror in the carrier of the voice coil motor, the reflecting surface of which faces the bottom of the voice coil motor;
• Step 5.2 a collimator is arranged at the bottom of the spherical ejector, the collimator emits light to the mirror, and the light is reflected by the mirror and returned to the collimator;
• Step 5.3 Adjust the angle of the voice coil motor so that the incident and reflected rays of the mirror coincide.
• step 3 includes:
• Step 3.1 applying a thermosetting glue to the periphery of the through hole of the gasket;
• Step 3.2 Apply a layer of photocurable adhesive to the periphery of the thermosetting adhesive.
• step 6 includes:
• Step 6.1 photocuring the photocurable adhesive
• Step 6.2 The heat curing adhesive is thermally cured.
• the adhesive in the step 3 is a photothermal curing dual-purpose adhesive.
• step 6 includes:
• Step 6.1 performing photocuring on a peripheral region of the photothermal curing dual-purpose adhesive
• Step 6.2 Thermally curing the inner region of the photothermal curing dual-purpose adhesive.
• the spacer is a non-magnetic material.
• a method for assembling a voice coil motor includes the following steps:
• Step 1 assembling the components of the voice coil motor to form a complete voice coil motor, wherein
• the voice coil motor includes a base and a carrier disposed on the base, a coil is wound on an outer side of the carrier, and upper and lower ends of the carrier are respectively provided with an upper elastic piece and a lower elastic piece, and the upper elastic piece 35
• the upper elastic cover is further disposed, the outer side of the coil is provided with a magnetic component, and the outer side of the magnetic component is provided with a yoke;
• Step 2 Adjust the inclination of the voice coil motor by using the above-described tilt adjustment method.
• the inclination adjustment method can adjust the inclination angle caused by the assembly error and the design error in the manufacturing process of the ordinary voice coil motor, is simple and effective, and does not change the internal structure of the existing voice coil motor.
• FIG. 1 is a schematic view of a tilt adjustment seat of a voice coil motor provided by the present invention
• Figure 2 is a schematic view of a gasket provided by the present invention.
• FIG. 3 is a schematic view of a tilt adjusting device of a voice coil motor provided by the present invention.
• Figure 4 is a schematic view of a prior art voice coil motor
• FIG. 5 is a schematic diagram of a tilt angle adjustment method provided by the present invention.
• Figure 6 is a schematic view of a voice coil motor provided by the present invention.
• a tilt adjusting seat of a voice coil motor includes a base 11 and a base 11 disposed in the base 11
• a spherical ram 12 that moves up and down, the spherical ram 12 is a hollow structure having an opening at the top of the spherical surface.
• a gasket 2 having a through hole.
• a tilting angle adjusting device for a voice coil motor includes the reclining seat described in Embodiment 1 and The spacer 2 described in Embodiment 2 adsorbed on the base 11 of the reclining device, the spherical plunger 12 passes through the through hole, and the surface of the spacer 2 is coated with a layer of adhesive.
• the spacer 2 is a non-magnetic material to avoid affecting the magnetic field inside the voice coil motor.
• the adhesive includes a thermosetting adhesive located on the periphery of the through hole of the gasket and a photocurable adhesive located on the periphery of the heat curing adhesive, or preferably, the adhesive is a photothermal curing dual-purpose adhesive.
• a conventional voice coil motor of the prior art includes a base 31 and a carrier 32 disposed on the base 31.
• the outer side of the carrier 32 is wound with a coil 33.
• the upper and lower ends of the carrier 32 are respectively provided with a upper elastic piece 35 and a lower elastic piece 34, and the upper elastic piece 35 is further provided with an upper elastic piece cover 36.
• the outer side of the coil 33 is provided with a magnetic component (not shown), and the outer side of the magnetic component (not shown) is provided with a yoke 37.
• a method for adjusting the inclination of a voice coil motor includes the following steps:
• Step 1 providing the reclining seat described in Embodiment 1 and the spacer 2 described in Embodiment 2;
• Step 2 adsorbing the gasket 2 on the base 11 of the reclining seat, the spherical jack 12 passing through the through hole thereof;
• Step 3 coating a layer of adhesive 4 on the surface of the gasket 2 ;
• Step 4 Adjust the spherical ram 12 to a suitable height and place the voice coil motor on the spherical ram 12 The voice coil motor is in contact with the glue 4 on the spherical surface;
• Step 5 Adjust the angle of the voice coil motor so that the optical axis of the voice coil motor is perpendicular to the spacer 2;
• Step 6 Curing the adhesive 4 between the gasket 2 and the voice coil motor.
• the voice coil motor In the process of assembly, the voice coil motor inevitably has assembly errors, or errors in the design of each component, and the carrier 32 is not perpendicular to the base 31.
• the carrier 32 When the base 31 is placed on a horizontal plane, the carrier 32 There is a slight inclination angle ⁇ between the central axis and the vertical axis, resulting in an inclination angle ⁇ between the optical axis of the voice coil motor and the vertical axis.
• the present invention places the voice coil motor on the spherical surface of the spherical ejector 12, and the voice coil motor can be made on the spherical surface.
• step 5 includes:
• Step 5.1 Install a mirror 5 in the carrier 32 of the voice coil motor, the reflecting surface of which faces the bottom of the voice coil motor;
• Step 5.2 A collimator 6 is disposed at the bottom of the spherical ejector 12, and the collimator 6 is directed to the mirror 5 The light is emitted, and the light is reflected by the mirror 5 and returned to the collimator 6;
• Step 5.3 Adjust the angle of the voice coil motor so that the incident and reflected rays of the mirror 5 coincide.
• the voice coil motor In the assembly process, the voice coil motor inevitably produces a tilt angle ⁇ of its carrier 32, and the tilt angle ⁇ is small, generally not exceeding 30. In less than half a degree; in general, if the inclination angle ⁇ exceeds 20 points, it will be regarded as waste, and the meaning of adjustment will be lost.
• the inclination angle ⁇ is 20 minutes, after the correction, the height difference between the two ends of the base 31 is 0.05 mm, which is indistinguishable from the naked eye and the microscope. According to the prior art, only the collimator can be used. Accurate equipment can be detected.
• the base 31 has a height difference at both ends thereof, that is, the base 31 and the spacer 2 There is an angle ⁇ between them, but the height difference is extremely small. Since the adhesive 4 has fluidity before uncured, during the adjustment process, when the base 31 presses the gasket 2, the uncured adhesive 4 is enough to fill up. Base The gap between 31 and spacer 2 compensates for the difference in height between the ends of the base 31.
• step 3 includes:
• Step 3.1 coating a thermosetting adhesive on the periphery of the through hole of the gasket 2;
• Step 3.2 Apply a layer of photocurable adhesive to the periphery of the thermosetting adhesive.
• step 6 includes:
• Step 6.1 photocuring the photocurable adhesive
• Step 6.2 The heat curing adhesive is thermally cured.
• the spacer 2 and the base 31 are first used.
• the periphery between the 31 is shaped by photocuring, and the interior is finally fixed by thermal curing.
• the adhesive in step 3 is a photothermal curing dual-purpose adhesive
• step 6 includes:
• Step 6.1 performing photocuring on a peripheral region of the photothermal curing dual-purpose adhesive
• Step 6.2 Thermally curing the inner region of the photothermal curing dual-purpose adhesive.
• the spacer 2 is a non-magnetic material to avoid affecting the magnetic field inside the voice coil motor.
• a method for assembling a voice coil motor includes the following steps:
• Step 1 Assemble the components of the voice coil motor together to form a complete voice coil motor
• the voice coil motor is the voice coil motor described in Embodiment 4, and includes a base 31 and a carrier 32 disposed on the base 31.
• the outer side of the carrier 32 is wound with a coil 33.
• the upper and lower ends of the carrier 32 are respectively provided with a upper elastic piece 35 and a lower elastic piece 34, and the upper elastic piece 35 is further provided with an upper elastic piece cover 36.
• the outer side of the coil 33 is provided with a magnetic component (not shown), and the outer side of the magnetic component (not shown) is provided with a yoke
• Step 2 The inclination angle of the voice coil motor is adjusted by the inclination adjustment method described in Embodiment 5.
• a voice coil motor has a gasket 2 adhered to the bottom of the voice coil motor through the adhesive 4, and the gasket 2 There is a through hole, and the optical axis of the voice coil motor is perpendicular to the spacer 2.
• the specific structure of the voice coil motor includes a base 31 and a carrier 32 disposed on the base 31, the carrier 32
• the outer side of the carrier 32 is provided with a coil 33 and a lower elastic piece 34, and the upper elastic piece 35 is further provided with a spring cover 36, the coil 33
• a magnetic component (not shown) is provided on the outer side, and a yoke is provided on the outer side of the magnetic component (not shown).
• the adhesive 4 includes a thermosetting adhesive located on the periphery of the through hole of the spacer 2 and a photocurable adhesive located on the periphery of the thermosetting adhesive.
• the periphery between the gasket 2 and the base 31 is first set by photocuring, and then the interior is finally fixed by heat curing.
• the adhesive 4 for the photothermal curing dual-purpose adhesive the peripheral region of the photothermal curing dual-purpose adhesive is first photocured by ultraviolet light, and then the inner region of the photothermal curing dual-purpose adhesive is thermally cured.
• the spacer 2 is a non-magnetic material to avoid affecting the magnetic field inside the voice coil motor.

Landscapes

• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Optics & Photonics (AREA)
• Reciprocating, Oscillating Or Vibrating Motors (AREA)
• Manufacture Of Motors, Generators (AREA)
• Lens Barrels (AREA)

Priority Applications (2)

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Citations (8)

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• 2016
  • 2016-10-27 CN CN201610956653.6A patent/CN106291968B/zh active Active
• 2017
  • 2017-03-20 JP JP2017567781A patent/JP6553754B2/ja active Active
  • 2017-03-20 WO PCT/CN2017/077355 patent/WO2018076597A1/zh active Application Filing
  • 2017-03-20 KR KR1020187025558A patent/KR102124391B1/ko active IP Right Grant

Patent Citations (8)

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