CN102810968A

CN102810968A - Voice coil motor actuator and picture taking device

Info

Publication number: CN102810968A
Application number: CN2011101418020A
Authority: CN
Inventors: 柯朝元
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Scienbizip Consulting Shenzhen Co Ltd
Priority date: 2011-05-30
Filing date: 2011-05-30
Publication date: 2012-12-05
Anticipated expiration: 2031-05-30
Also published as: CN102810968B

Abstract

The invention relates to a voice coil motor actuator, comprising a moving piece, a coil, a plurality of magnets, an upper elastic sheet and a shell. The coil is wound on the outer wall of the moving piece; the shell comprises a plurality of side plates; and the plurality of side plates are sequentially connected end to end. Each magnet is fixed on two inner surfaces of two adjacent side plates; and the moving piece and the coil can be movably arranged in the shell. The upper elastic sheet is arranged on the moving piece and held in the shell. The plurality of magnets are arranged at the periphery of the coil, so that the moving piece moves along the central axis direction of the moving piece under the interactions between the magnets and the coil when the coil is electrified. The invention further relates to a picture taking device comprising the voice coil motor actuator.

Description

Voice coil motor actuator and image-taking device

Technical field

The present invention relates to a kind of voice coil motor actuator and a kind of image-taking device with this voice coil motor actuator.

Background technology

Voice coil motor actuator generally all includes fixedly fitted tube and that shell, is positioned at this shell and is installed in this fixedly movable part of fitted tube movably.This movable part outer periphery is equipped with coil, this fixedly fitted tube be provided with magnet.Under the situation of energising, this voice coil motor actuator drives this movable part through the interaction force between magnet and the hot-wire coil and moves reciprocatingly.But the complex structure and the volume of above-mentioned voice coil motor actuator are bigger, are unfavorable for the miniaturization of voice coil motor actuator and the raising of packaging efficiency.

Summary of the invention

In view of this, be necessary to provide a kind of simple in structure and compact voice coil motor actuator and a kind of image-taking device with this voice coil motor actuator.

A kind of voice coil motor actuator, it comprises movable part, coil, a plurality of magnet, goes up shell fragment and shell.This coil is wound in the outer wall of this movable part, and this shell comprises a plurality of side plates, and these a plurality of side plates are end to end successively.The both sides of each magnet are separately fixed on two inner surfaces of two adjacent side plates, and this movable part and this coil can be installed in this shell versatilely.Upward shell fragment is arranged on this movable part and is contained in this shell.These a plurality of magnet this coil periphery is set so that at this coil in galvanization, this movable part central axis direction moves this movable part in the interaction lower edge of this magnet and coil.

A kind of image-taking device, it comprises lens unit, image sensor and above-mentioned voice coil motor actuator.This lens unit is fixed in this movable part, and this image sensor is arranged on the picture side of this lens unit.The central shaft of this movable part and the light shaft coaxle of this lens unit, under the interaction of this magnet and this coil, this this lens unit of movable part drive moves along the central axis direction of movable part.

Compare prior art; Voice coil motor actuator provided by the present invention and image-taking device are through being fixed in magnet on the inwall of shell; Thereby can omit fixedly fitted tube; And then simplified the structure of whole voice coil motor actuator and image-taking device, and make the structure of voice coil motor actuator and image-taking device compact more, packaging efficiency promotes greatly.

Description of drawings

Fig. 1 is the schematic perspective view of the voice coil motor actuator that first embodiment of the invention provided.

Fig. 2 be Fig. 1 the decomposing schematic representation of voice coil motor actuator.

Fig. 3 is the generalized section along the III-III line of Fig. 1.

Fig. 4 is the part assembly drawing of the voice coil motor actuator of Fig. 2.

The generalized section of a kind of image-taking device that Fig. 5 provides for second embodiment of the invention.

The main element symbol description

Voice coil motor actuator	100
		Shell	10
Top board	15
		Side plate	11，12，13，14
First light hole	16
		Guidance part	17
Inner surface	111，121
		Fixture block	110
Last shell fragment	30
		Fixed part	31
Movable part	32
		Second light hole	33
Magnet	40
		Lateral surface	41，42
Movable part	60
		Center through hole	611
Coil	62
		Following shell fragment	70
First burst	71
		Second burst	72
First pin	711
		Second pin	721
Location hole	73
		Load bearing seat	80
Through hole	81
		Reference column	82
Side	83
		Draw-in groove	84
Distance piece	90
		Image-taking device	200
Lens unit	210
		Set of lenses	220
Lens barrel	230
		Image sensor	240

Following embodiment will combine above-mentioned accompanying drawing to further specify the present invention.

Embodiment

To combine accompanying drawing that execution mode provided by the present invention is done further explain below.

Please consult Fig. 1 to Fig. 4 in the lump, the voice coil motor actuator 100 that first embodiment of the invention provides, this voice coil motor actuator 100 are used for driving lens unit 210 (ginseng Fig. 5) motion.

This voice coil motor actuator 100 comprises shell 10, last 30,4 magnet 40 of shell fragment, movable part 60, coil 62, following shell fragment 70, load bearing seat 80 and distance piece 90.

Shell 10 roughly is square; It can be processed by electromagnetic shielding materials such as dilval, conductive plastics, surface conductance material, electro-conductive glass, thereby makes this shell 10 have to eliminate external electromagnetic to the interference of this voice coil motor actuator 100 and prevent the function of its exterior electrical components of electromagnetic effect of this voice coil motor actuator 100.

This shell 10 includes a square top board 15, first side plate 11, second side plate 12, the 3rd side plate 13 and the 4th side plate 14.This first side plate 11 and the 3rd side plate 13 are oppositely arranged and connect this second side plate 12 and the 4th side plate 14, and this second side plate 12 and the 4th side plate 14 are oppositely arranged and connect this first side plate 11 and the 3rd side plate 13.This first side plate 11, second side plate 12, the 3rd side plate 13 and the 4th side plate 14 are arranged at square top board 15 4 limits, and this square top board 15 and four

side plates

11,12,13 and 14 surround in order to accommodate this movable part 60, this coil 62, to go up the shell fragment 30 and the receiving space 300 of shell fragment 70 down.The geometric center of this square top board 15 offers one first light hole 16 so that ambient light enters in this shell 10 thus.This first light hole 16 communicates with receiving space 300.The lower limb of first side plate 11 and the 3rd side plate 13 all has fixture block 110.

Magnet 40 is used in this shell 10, producing magnetic field.Each magnet 40 roughly is directly triangular prism shaped, and it is two roughly rectangular triangles in bottom surface up and down.Each magnet 40 is fixed on two inner surfaces of the biside plate that is connected.Please combine the develop simultaneously fixed form of an example shows magnet 40 of Fig. 4.Magnet 40 comprises two interconnective

lateral surfaces

41 and 42; First side plate 11 comprises first inner surface 111; Second side plate 12 comprises second inner surface 121; Lateral surface 41 adheres on first inner surface 111, and lateral surface 42 adheres on second inner surface 121, thereby on two inner surfaces 111,121 of the

biside plate

11,12 that magnet 40 is fixed on be connected.

Last shell fragment 30 roughly is square, and the heart offers one and these first light hole, 16 corresponding second light holes 33 therein.Last shell fragment 30 also includes fixed part 31 and movable part 32, and this fixed part 31 and movable part 32 all are provided with around this second light hole 33, and wherein this movable part 32 is near this second light hole 33, and this fixed part 31 is away from this second light hole 33.Distance piece 90 is arranged between this fixed part 31 and this top board 15 of shell fragment 30 on this, and this fixed part 31 that this magnet 40 will be gone up shell fragment 30 is resisted against on this distance piece 90 so that shell fragment on this 30 is fixed (ginseng Fig. 4).

For the convenience of assembling, this shell 10 comprises a plurality of guidance parts 17.This guidance part 17 extends and is arranged in this movable part 32 of shell fragment 30 on this in this shell 10 from these top board 15 edges that surround this first light hole 16.

Understandable, shell fragment 30 also can be fixed on through other mode on this distance piece 90 on this, for example through set screw or put the fixed part 31 that modes such as glue is fixing will go up shell fragment 30 and be fixed on this distance piece 90.The setting of distance piece 90 makes the movable part 32 of shell fragment 30 have enough spaces to move/deformation.Certainly; In other embodiments; Voice coil motor actuator 100 can omit this distance piece 90, and the thickness that will go up the fixed part 31 of shell fragment 30 becomes bigger than the thickness of movable part 32, as the movable part 32 of last shell fragment 30 required deformation/mobile space is provided; Or it is after 90s to omit this distance piece, reduces the deformation/moving disorder of the movable part 32 of going up shell fragment 30 etc. through the area that increases first light hole 16.

This movable part 60 roughly is tubular; It offers the center through hole 611 with internal thread; This center through hole 611 is used for accommodating lens unit 210 (ginseng Fig. 5), and the external thread bolt connection of this internal thread and lens unit 210 is to fix as one this lens unit 210 with this movable part 60.This coil 62 is wrapped in this movable part 60 outer walls.

The structural similarity of the structure of following shell fragment 70 and last shell fragment 30; Movable part and fixed part that it also has light hole and is provided with around this light hole; Its difference is: this time shell fragment 70 is split-type design, and it comprises first burst 71 and second burst, 72 first bursts of space.This voice coil motor actuator 100 comprises first pin 711 and second pin 721.This first pin 711, this first burst 71, this coil 62, this second burst 72 are connected with this second pin 721 successively, therefore, join through the both positive and negative polarity with first pin 711 and second pin 721 and power supply, just can electric current be provided to coil 62.Be appreciated that in other embodiments the structure of this time shell fragment 70 can be identical with the structure of last shell fragment 30, and first pin 711, coil 62 and second pin 721 are connected successively.

This movable part 60 by shell fragment on this 30 and down shell fragment about in the of 70 clamping and be contained in this shell 10; Wherein the two ends of this movable part 60 respectively with this on the shell fragment 30 and movable part of shell fragment 70 is affixed each other down, thereby make this movable part 60 movable being contained in this shell 10.

During use; First pin 711, second pin 721 through as current input terminal are carried electric currents to coil 62; This moment, alive coil 62 received the effect of power in the magnetic field that forms around four magnet of its setting 40, moved along the central axis L direction of movable part 60 thereby drive movable part 60.

Load bearing seat 80 cooperates with this shell 10 to accommodate shell fragment 30, a plurality of magnet 40, movable part 60 and following shell fragment 70.The center of load bearing seat 80 has through hole 81, and its size is suitable with the center through hole 611 of this movable part 60.On four jiaos of this load bearing seat 80, also be provided with a plurality of reference columns 82.Corresponding with this a plurality of reference column 82, be provided with a plurality of location holes 73 in the relevant position at four angles of this time shell fragment 70, this load bearing seat 80 and this time shell fragment 70 are through this reference column 82 and location hole 73 location and to put glue affixed each other.The load bearing seat 80 and first side plate 11 and the 3rd side plate 13 corresponding dual-sides 83 offer draw-in groove 84, and when load bearing seat 80 cooperated with this shell 10, fixture block 110 was sticked in the corresponding draw-in groove 84 so that load bearing seat 80 and this shell 10 are interfixed.

Please join Fig. 5, a kind of image-taking device 200 that second embodiment of the invention provides comprises lens unit 210, image sensor 240 and above-mentioned voice coil motor actuator 100.

The optical axis O of this lens unit 210 is coaxial with the central axis L of movable part 60.This lens unit 210 is fixed in this movable part 60.Particularly, this lens unit 210 comprises set of lenses 220 and lens barrel 230, and this set of lenses 220 is contained in this lens barrel 230, and this lens barrel 230 is contained in this movable part 60 and with this movable part 60 and screws togather each other.

Understandable, in other embodiments, lens unit 210 can omit lens barrel 230 and directly set of lenses 220 is screwed togather or is glued in this movable part 60.

This image sensor 240 be positioned at lens unit 210 as side and be contained in this load bearing seat 80.

During use; Coil 62 to being wrapped on this movable part 60 is carried electric current; Under the effect of magnet 40 and coil 62, this movable part 60 drives the lens unit 210 that is contained in wherein and takes place to move along optical axis O (central axis L of the movable part 60) direction of this lens unit 210.

Understandable, in other embodiments, this image sensor 240 can not be housed in this load bearing seat 80, and this image-taking device 200 can include a microscope base that cooperatively interacts with this lens barrel 230, and wherein this microscope base is used for accommodating this image sensor 240.In addition, shell 10 cooperates the shape that forms to be not limited to roughly be in this execution mode hexahedral shape with 80 of load bearing seats, can also be other polyhedral shape.The quantity of magnet 40 is not limited to 4, also can be other quantity, only needs to produce uniform actuating force to coil 62 and gets final product.

Above-mentioned voice coil motor actuator 100 and image-taking device 200 are through being fixed in magnet 40 on the inwall of shell 10; Thereby can omit fixedly fitted tube; And then simplified the structure of whole voice coil motor actuator 100 and image-taking device 200, and make the structure of voice coil motor actuator 100 and image-taking device 200 compact more, packaging efficiency promotes greatly.

In addition, those skilled in the art can also do other variation in spirit of the present invention.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 actuator; It comprises movable part, coil, a plurality of magnet, goes up shell fragment and shell, and this coil is wound in the outer wall of this movable part, and this shell comprises a plurality of side plates; These a plurality of side plates are end to end successively; The both sides of each magnet are separately fixed on two inner surfaces of two adjacent side plates, and this movable part and this coil can be installed in this shell versatilely, and shell fragment is arranged on this movable part and is contained in this shell on this; These a plurality of magnet this coil periphery is set so that at this coil in galvanization, this movable part central axis direction moves this movable part in the interaction lower edge of this magnet and coil.

2. voice coil motor actuator as claimed in claim 1; It is characterized in that; This shell comprises the top board that is connected to these a plurality of side plates, and this top board and this a plurality of side plates surround in order to accommodate the receiving space of this movable part and this coil, and this top board offers the light hole that communicates with this receiving space.

3. voice coil motor actuator as claimed in claim 2; It is characterized in that this voice coil motor actuator comprises shell fragment down, this time shell fragment is contained in this shell; Should go up shell fragment and this time shell fragment with the clamping up and down of this movable part; Upward shell fragment and this time shell fragment all have fixed part and movable part, and this fixed part and this shell are affixed each other, and this movable part and this movable part are affixed each other.

4. voice coil motor actuator as claimed in claim 3; It is characterized in that; This voice coil motor actuator comprises distance piece; This distance piece is arranged between this fixed part and this top board of shell fragment on this, and this fixed part that this magnet will be gone up shell fragment is resisted against on this distance piece so that shell fragment on this is fixed.

5. voice coil motor actuator as claimed in claim 4 is characterized in that this shell comprises guidance part, and this guidance part extends and be arranged in this movable part of shell fragment on this in this shell from this top board edge that surrounds this light hole.

6. like each described voice coil motor actuator of claim 3 to 5; It is characterized in that; This time shell fragment comprises first burst and second burst of space; This voice coil motor actuator comprises first pin and second pin, and this first pin, this first burst, this coil, this second burst are connected with this second pin successively.

7. voice coil motor actuator as claimed in claim 6 is characterized in that this voice coil motor actuator comprises the load bearing seat that matches with this shell, and this load bearing seat matches with this shell to accommodate shell fragment on this, these a plurality of magnet, this movable part and following shell fragment.

8. image-taking device; It comprises lens unit, image sensor and voice coil motor actuator as claimed in claim 1; This lens unit is fixed in this movable part, and this image sensor is arranged on the picture side of this lens unit, the central shaft of this movable part and the light shaft coaxle of this lens unit; Under the interaction of this magnet and this coil, this this lens unit of movable part drive moves along the central axis direction of this movable part.

9. image-taking device as claimed in claim 8 is characterized in that this lens unit comprises set of lenses and lens barrel, and this set of lenses is contained in this lens barrel, and this lens barrel is contained in this movable part and with this movable part and screws togather each other.

10. image-taking device as claimed in claim 8; It is characterized in that; This shell comprises the top board that is connected to these a plurality of side plates, and this top board and this a plurality of side plates surround in order to accommodate the receiving space of this movable part and this coil, and this top board offers the light hole that communicates with this receiving space.