CN102540637A

CN102540637A - Voice coil motor, camera module with voice coil motor and portable electronic device

Info

Publication number: CN102540637A
Application number: CN2010106044715A
Authority: CN
Inventors: 黄建峰
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2010-12-24
Filing date: 2010-12-24
Publication date: 2012-07-04

Abstract

The invention relates to a voice coil motor, which comprises a movable outfitting tube and an elastic piece. The movable outfitting tube is provided with at least two positioning parts. The elastic piece is provided with an upper surface, a lower surface, a light through hole and an inner frame provided at least two positioning holes matched with at least two positioning parts for use. The positioning parts are provided with positioning columns and blocking portions arranged on the positioning columns which are matched with the positioning holes to position the movable outfitting tube and the elastic piece. The blocking portions are used for blocking movement of the inner frame of the elastic piece relative to the movable outfitting tube. At least two gaps distributed at intervals are arranged on the inner surface of at least one positioning hole, and each gap is communicated with the corresponding positioning hole and penetrates through the upper surface and the lower surface of the elastic piece. The invention further relates to a camera module with the voice coil motor and a portable electronic device with the camera module.

Description

Voice coil motor, adopt the camera module and the portable electron device of this voice coil motor

Technical field

The present invention relates to a kind of voice coil motor, have the camera module of this voice coil motor and use the portable electron device of this camera module.

Background technology

(Voice Coil Motor VCM) is suitable as actuator in the electronic product (like digital camera, mobile phone, DV etc.) to the voice coil motor that have that volume is little, power consumption reaches advantage such as cheap less.

Traditional voice coil motor is in assembling; For guaranteeing assembly precision, the mode that adopts reference column and corresponding pilot hole to match is carried out pre-determined bit to movable accommodating cylinder in the voice coil motor and shell fragment more, after pre-determined bit finishes; In being equipped with the pilot hole of this reference column, put glue, thus fixing corresponding assembly.

Usually, the voice coil motor that assembles need pass through drops test, and the voice coil motor of test passes just can come into the market.In this test process, the glue at some glue position is prone to come off, and then causes the property quietly of this voice coil motor relatively poor.

Summary of the invention

In view of this, be necessary the voice coil motor that provides a kind of stability preferable, camera module and the portable electron device that uses this camera module with this voice coil motor.

A kind of voice coil motor comprises a movable accommodating cylinder and a shell fragment that is connected in this movable accommodating cylinder one end.The end that this movable accommodating cylinder links to each other with this shell fragment is provided with at least two keepers.This shell fragment has lower surface that a upper surface, one and this upper surface deviate from mutually, light hole that runs through this upper surface and lower surface, and inside casing around this light hole.This inside casing is provided with at least two pilot holes that match and use with these at least two keepers.This keeper has a reference column, reaches an end stop of being located at this reference column away from this movable accommodating cylinder.This reference column matches with this pilot hole this movable accommodating cylinder and this shell fragment location.This stopper section is used to stop the inside casing of this shell fragment to move relative to this movable accommodating cylinder.The inside surface of at least one pilot hole in these at least two pilot holes is provided with at least two slits spaced apart, and its corresponding pilot hole in each slit is connected and runs through the upper and lower surfaces of this shell fragment.

A kind of camera module comprises lens barrel and above-mentioned voice coil motor.This voice coil motor is used to drive this lens barrel and moves to realize focusing.The movable accommodating cylinder of this voice coil motor is used to accommodate this lens barrel.

A kind of portable electron device comprises electronics and is arranged at the above-mentioned camera module on this electronics.

Compared with prior art; The pilot hole of the voice coil motor of the embodiment of the invention matches with reference column; So that the inside casing of this shell fragment and this movable accommodating cylinder location, and this stopper section is used to stop the inside casing of this shell fragment to move relative to this movable accommodating cylinder, not only omitted the some glue process between this inside casing and movable accommodating cylinder; Also make stable preferable between this movable accommodating cylinder and the inside casing, have voice coil motor stable preferable of this movable accommodating cylinder and shell fragment.In addition, each slit makes when reference column passes pilot hole that pilot hole can have deformation space slightly, and assembling process is more prone to.

Description of drawings

Fig. 1 is the schematic perspective view of the portable electron device that provides of the embodiment of the invention.

Fig. 2 is the decomposing schematic representation of the camera module of the portable electron device among Fig. 1.

Fig. 3 is the decomposing schematic representation of the voice coil motor of the camera module among Fig. 2.

Fig. 4 is the partial enlarged drawing in the IV zone among Fig. 3.

Fig. 5 is the synoptic diagram of the shell fragment of the voice coil motor among Fig. 3.

Fig. 6 is the partial enlarged drawing in the IV zone among Fig. 5.

Fig. 7 is the signal that the shell fragment of the voice coil motor among Fig. 3 combines with movable accommodating cylinder.

The main element symbol description

Portable electron device 100

Electronics 10

Camera module 30

Voice coil motor 31

Lens barrel 33

Circuit board 35

Sensor 36

Shell 37

Actuation body 38

Top board 371

First side plate 373

Second side plate 375

Light hole

377,3874,3895

Fixation kit 381

Movable component 385

Shell fragment 387

Supporting body 389

Fixed body 3811

Magnet 3812

Fixed mount 3813

Upper end

3814,3853

Lower end

3815,3854

First host cavity 3816

Sidewall 3817

Host cavity 3818

First location structure 3819

Second location structure 3820

Movable accommodating cylinder 3851

Coil 3852

Second host cavity 3855

Last keeper 3856

Reference column 3857

Stopper section 3858

Link 3859

Top 3860

Dull and stereotyped 3871

Upper surface

3872,3891

Lower surface

3873,3893

Housing 3875

Inside casing 3876

Elasticity arm 3877

Pilot hole

3878,3879

Slit 3880

The 4th location structure 3897

Embodiment

To combine accompanying drawing that the embodiment of the invention is done further explain below.

See also Fig. 1, the portable electron device 100 that the embodiment of the invention provides comprises an electronics 10 and a camera module 30 of being located on the electronics 10.

See also Fig. 2, camera module 30 comprises that a voice coil motor 31, one contain the lens barrel 33 of eyeglass (figure does not show), one and be located at circuit board 35 on the electronics 10, and sensor 36 of being located on the circuit board 35.Sensor 36 is oppositely arranged with lens barrel 33.Eyeglass in the extraneous light irradiation lens barrel 33, and then this eyeglass of process incides on the sensor 36.

Please consult Fig. 3 in the lump, voice coil motor 31 comprises a shell 37 and an actuation body 38 that is contained in the shell 37.

Shell 37 is used for protecting other assembly of voice coil motor 31 to avoid outside contamination and damage, and it has a top board 371, two first side plates 373 and two second side plates 375.The central authorities of top board 371 are provided with light hole 377, so that light passes top board 371.Two first side plates 373 are arranged at the relative both sides of top board 371.Two second side plates 375 are arranged at the in addition relative both sides of top board 371.Top board 371, two first side plates 373 and two second side plates 375 form receiving spaces (figure does not show), so that actuation body 38 is contained in this shell 37.

Preferably, in the present embodiment, shell 37 is processed through Rhometal, to eliminate external electromagnetic field to the interference of voice coil motor 31 and prevent the work of its external electronic components of electromagnetic field effects of voice coil motor 31.Certainly, shell 37 also can be processed through other magnetic shielding materials such as conductive plastics, surface conduction material, electro-conductive glass.

Actuation body 38 comprises movable component 385, and two shell fragments 387 that lay respectively at movable component 385 two ends, and supporting body 389 of being located at fixed mount 3813 away from the end of top board 371 of the fixation kit 381 of a both ends open, a both ends open.

Fixation kit 381 comprises a fixed body 3811 and four magnet 3812 of being located at fixed body 3811.

Fixed body 3811 comprises a fixed mount 3813.

Fixed mount 3813 has lower end 3815 that a upper end 3814, one and upper end 3814 deviate from mutually, and first host cavity 3816 that runs through upper end 3814 and lower end 3815.

In the present embodiment; Fixed mount 3813 support body for roughly being square, it has end to end four sidewalls 3817, four and is located at the host cavity 3818 that is used to accommodate magnet 3812 of four sidewalls 3817, four respectively and is located at first location structure 3819 of upper end 3814 end faces, and four second location structures 3820 of being located at lower end 3815 end faces.Host cavity 3818 runs through corresponding sidewall 3817, and is connected with first host cavity 3816.First location structure 3819 and second location structure 3820 are reference column.

Certainly, fixed mount 3813 also can be for the support body that is column type, be triangular prism shaped support body, be the support body of other shapes such as support body of pentagonal prism shape.Certainly, host cavity 3818 also can be substituted to the groove that the outside surface of sidewall 3817 is recessed to form by the inside surface of sidewall 3817.Certainly, host cavity 3818 also can be substituted to the groove that the inside surface of sidewall 3817 is recessed to form by the outside surface of sidewall 3817.Certainly, also can omit host cavity 3818, directly magnet 3812 is located at the inside surface of sidewall 3817.Certainly, first location structure 3819 also can be detent or pilot hole.

Movable component 385 comprises a movable accommodating cylinder 3851 and a coil 3852 of being located at movable accommodating cylinder 3851 outer walls.

Movable accommodating cylinder 3851 is contained in first host cavity 3816 versatilely, it comprise lower end that a upper end 3853, one and upper end 3853 deviate from mutually 3854, one run through circle second host cavity 3855 of upper end 3853 and lower end 3854, four compartment of terrains be located at the last keeper 3856 of upper end 3853 end faces, and four compartment of terrains be located at the following keeper (scheming not show) of lower end 3854 end faces.In the present embodiment, the cylindrical body of movable accommodating cylinder 3851 for roughly being square.

Certainly, movable accommodating cylinder 3851 also can be for being triangular prism shaped cylindrical body, being the cylindrical body of pentagonal prism shape or being the support body of other shapes such as cylindrical body of hexagon.

Keeper 3856 has a reference column 3857, reaches a stopper section 3858 of being located at reference column 3857 away from the end of upper end 3853 on each.

In the present embodiment, reference column 3857 is cylindrical, perpendicular to upper end 3853 end faces, and one-body molded with stopper section 3858.

Certainly, reference column 3857 also can triangular prism, the prism of other shape such as quadrangular or pentagonal prism.Certainly, the angle between reference column 3857 and upper end 3853 end faces also can be less than 90 degree.Certainly, reference column 3857 and also moulding separately of stopper section 3858 fix as one through gluing together other consolidation method such as bond, be spirally connected again.

Please consult Fig. 4 in the lump, stopper section 3858 is up-thin-low-thick truncated cone, and it has a link 3859 that links to each other with reference column 3857, reaches a top 3860 that deviates from mutually with link 3859.Top 3860 and reference column 3857 all fall in the projection of link 3859 on 3853 end faces of upper end in the projection on 3853 end faces of upper end, so that stopper section 3858 can stop shell fragment 387 inside to be moved relative to movable accommodating cylinder 3851.

Preferably, in the present embodiment, the distance between upper end 3853 and the link 3859 equals the thickness of shell fragment 387, can more closely be located between upper end 3853 and the stopper section 3858 so that glue need not be put in shell fragment 387 inside.

Following keeper is identical with the structure of last keeper 3856, repeats no more at this.

Certainly, movable accommodating cylinder 3851 also can be the cylindrical body of other shapes such as cylindrical body of columniform cylindrical body, triangular prism shaped cylindrical body, pentagonal prism shape.

Please consult Fig. 5 and Fig. 6 in the lump, shell fragment 387 has a flat board 3871.Dull and stereotyped 3871 have light hole 3874, one that lower surface that a upper surface 3872, one and upper surface 3872 deviate from mutually 3873, one run through upper surface 3872 and lower surface 3873 around light hole 3874 and away from the housing of light hole 3,874 3875, one around light hole 3874 and near the inside casing 3876 of light hole 3874, reach four elasticity arms 3877 between housing 3875 and inside casing 3876.Light hole 3874 makes the light that passes this eyeglass can pass shell fragment 387.Certainly, also can establish two, three, five or more a plurality of elasticity arm 3877 between housing 3875 and the inside casing 3876.

Housing 3875 is a square structure, and it has four pilot holes 3878 that are used with first location structure 3819.Pilot hole 3878 matches with first location structure 3819 shell fragment 387 and fixed mount 3813 location.In order to make the housing 3875 of shell fragment 387 more firm regularly, also can between the pilot hole 3878 and first location structure 3819, put glue with fixed mount 3813.

Certainly, the shape of housing 3875 also can be other geometric configuratioies such as circle, triangle, quadrilateral, pentagon or six side shapes.

Inside casing 3876 offers four pilot holes 3879 that are used respectively with four reference columns 3857.Pilot hole 3879 matches with reference column 3857, so that the inside casing 3876 of shell fragment 387 and movable accommodating cylinder 3851 location, and stopper section 3858 can prevent that inside casing 3876 from moving relative to movable accommodating cylinder 3851.

Preferably, the inside surface of each pilot hole 3879 is provided with four spare time at a distance from the slit 3880 that distributes, so that when going up keeper 3856 and passing pilot hole 3879, pilot hole 3879 can have deformation space slightly, assembling process is more prone to.Each slit 3880 is connected with positioning hole corresponding 3879 and runs through dull and stereotyped 3871 upper surface 3872 and lower surface 3873.Certainly, also can only there be the inside surface of, two or three pilot holes 3879 to be provided with slit 3880.Certainly, the number in slit 3880 also can be one, two, three or more a plurality of.

Please consult Fig. 7 in the lump; Pilot hole 3879 matches with reference column 3857; So that the inside casing 3876 of shell fragment 387 and movable accommodating cylinder 3851 location; And that the inside casing 3876 of shell fragment 387 closely is located in stopper section 3858 and movable accommodating cylinder 3851 and shell fragment 387 is at a distance of between the nearest end face; Not only omit the some glue process between inside casing 3876 and movable accommodating cylinder 3851, also made stable preferable between movable accommodating cylinder 3851 and the inside casing 3876, had voice coil motor 31 stable preferable of movable accommodating cylinder 3851 and shell fragment 387.

Supporting body 389 has light hole 3895, and four the 4th location structures 3897 that match with four second location structures 3820 respectively and use that lower surface that a upper surface 3891, one and upper surface 3891 deviate from mutually 3893, run through upper surface 3891 and lower surface 3893.

Supporting body 389 is fixed as one through four second location structures 3820 and cooperatively interacting of four the 4th location structures 3897 with the fixed mount 3813 that is connected with housing 3875.In the present embodiment, the 4th location structure 3897 is a through hole.

Certainly, the number of shell fragment 387 also can be one.

Be appreciated that in the present invention the type of lens barrel 33 and sensor 36 and packaged type can be occur in the middle of the prior art any.

Certainly, portable electron device 100 also can be other electronic installations such as video recorder, digital camera.

In addition, those skilled in the art can also do other variation in spirit of the present invention, and certainly, these all should be included within the present invention's scope required for protection according to the variation that the present invention's spirit is done.

Claims

1. voice coil motor; It comprises a movable accommodating cylinder and a shell fragment that is connected in this movable accommodating cylinder one end; The end that this movable accommodating cylinder links to each other with this shell fragment is provided with at least two keepers; This shell fragment has lower surface that a upper surface, one and this upper surface deviate from mutually, light hole that runs through this upper surface and lower surface, and inside casing around this light hole; This inside casing is provided with at least two pilot holes that match and use with these at least two keepers, it is characterized in that this keeper has a reference column and a stopper section of being located at this reference column away from the end of this movable accommodating cylinder; This reference column matches with this pilot hole this movable accommodating cylinder and this shell fragment location; This stopper section is used to stop the inside casing of this shell fragment to move relative to this movable accommodating cylinder, and the inside surface of at least one pilot hole in these at least two pilot holes is provided with at least two slits spaced apart, and its corresponding pilot hole in each slit is connected and runs through the upper and lower surfaces of this shell fragment.

2. voice coil motor as claimed in claim 1 is characterized in that, this stopper section is a truncated cone.

3. voice coil motor as claimed in claim 2; It is characterized in that; This stopper section has a link that links to each other with this reference column, reaches a top that deviates from mutually with this link, and this top and this reference column all fall in the projection of this link on the end face of the end that this movable accommodating cylinder links to each other with this shell fragment in the projection on the end face of the end that this movable accommodating cylinder links to each other with this shell fragment.

4. voice coil motor as claimed in claim 1 is characterized in that, this reference column is a right cylinder, this pilot hole be shaped as circle.

5. voice coil motor as claimed in claim 1 is characterized in that, this reference column is a square cylinder, and being shaped as of this pilot hole is square.

6. voice coil motor as claimed in claim 1 is characterized in that, the end face of the end that this reference column links to each other with this shell fragment perpendicular to this movable accommodating cylinder.

7. voice coil motor as claimed in claim 1 is characterized in that, this voice coil motor further comprises a shell, and this movable accommodating cylinder and this shell fragment all are contained in this shell.

8. camera module; It comprises lens barrel, it is characterized in that, this camera module further comprises like arbitrary described voice coil motor in the claim 1 to 7; This voice coil motor is used to drive this lens barrel and moves to realize focusing, and the movable accommodating cylinder of this voice coil motor is used to accommodate this lens barrel.

9. portable electron device, it comprises an electronics and a camera module as claimed in claim 8 that is arranged on this electronics.