CN103312232A

CN103312232A - Magnetic suspension motor

Info

Publication number: CN103312232A
Application number: CN2012100639815A
Authority: CN
Inventors: 吴尚峰
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Scienbizip Consulting Shenzhen Co Ltd
Priority date: 2012-03-13
Filing date: 2012-03-13
Publication date: 2013-09-18
Anticipated expiration: 2032-03-13
Also published as: CN103312232B

Abstract

A magnetic suspension motor, which is used for driving a lens module, comprises a fixation unit and a movement unit. The fixation unit comprises a fixation support and first magnetic field generation assemblies, wherein the first magnetic field generation assemblies are fixed on the fixation support and the fixation support is provided with guide pillars. The movement unit, which is movably arranged in the fixation unit, comprises a movement support and second magnetic field generation assemblies, wherein the second magnetic field generation assemblies are fixed on the movement support; the movement support, which is for accommodating the lens module, is provided with notches corresponding to the guide pillars. At least one group of a group of the first magnetic field generation assemblies and a group of the second magnetic field generation assemblies is an electromagnet which contains a coil and an iron core. The movement unit, under the action of the magnetic field produced by the first magnetic field generation assemblies and the second magnetic field generation assemblies, moves along the guide pillars towards the direction of an optical axis in the fixation unit.

Description

Magnetic suspension motor

Technical field

The present invention relates to a kind of magnetic suspension motor.

Background technology

Voice coil motor (voice coil motor, VCM) cardinal principle is in permanent-magnetic field, by changing the size of current of voice coil motor interior loop, so that coil is received different magnetic field force effects, since the stretch position of control shell fragment, thereby drive that camera lens moves up and down and the locomotive function of reaching camera lens.

Because coil is along with camera lens moves up and down, coil is damaged sometimes, has distortion phenomenon thereby make when focusing or zoom, causes the voice coil motor reliability lower; In addition, shell fragment forever can produce elastic fatigue, also can have distortion phenomenon.

Summary of the invention

In view of this, be necessary the magnetic suspension motor that provides a kind of reliability higher.

A kind of magnetic suspension motor, be used for driving camera lens module, described magnetic suspension motor comprises fixed cell and active unit, described active unit arranges in the described fixed cell actively, described fixed cell comprises fixed mount and the first magnetic field generation component, described the first magnetic field generation component is fixed on the described fixed mount, has guide pillar on the described fixed mount, described active unit comprises adjustable shelf and the second magnetic field generation component, described the second magnetic field generation component is fixed on the described adjustable shelf, described adjustable shelf is used for holding described camera lens module, corresponding described guide pillar has breach on the described adjustable shelf, described guide pillar is fastened in the described breach, among described the first magnetic field generation component and the second magnetic field generation component at least one is the electromagnet that is that comprises coil and iron core, and described active unit moves along described optical axis direction in described fixed cell along described guide pillar under the effect in described the first magnetic field generation component and generation component generation magnetic field, the second magnetic field.

Compared to prior art, the magnetic suspension motor of the embodiment of the invention adopts magnetic field force to drive the active unit motion, owing to omitting shell fragment, elastic fatigue can not occur, thereby so that the reliability of magnetic suspension motor is higher again.

Description of drawings

Fig. 1 is the schematic diagram of embodiment of the invention magnetic suspension motor.

Fig. 2 is the decomposing schematic representation of Fig. 1.

Fig. 3 is the decomposing schematic representation of another angle of Fig. 2.

The main element symbol description

Magnetic suspension motor	100
		Housing	10
Fixed cell	20
		Fixed mount	21
The first magnetic field generation component	22
		The first spatial accommodation	200
Base plate	210
		Guide pillar	211
Blind hole	212
		Active unit	30
Adjustable shelf	31
		The second magnetic field generation component	32
The second spatial accommodation	300
		Groove	310
Breach	311
		Projection	312
Shell fragment	40
		Light hole	400
The first through hole	41
		The second through hole	42
Elastic part	43
		Supporting body	50
Projection	51

Following embodiment further specifies the present invention in connection with above-mentioned accompanying drawing.

Embodiment

See also Fig. 1, Fig. 2 and Fig. 3, the magnetic suspension motor 100 that the embodiment of the invention provides is used for driving the camera lens module (not shown) to realize focusing or zoom function, and camera lens module has optical axis.

Magnetic suspension motor 100 comprises housing 10, fixed cell 20, active unit 30, shell fragment 40 and supporting body 50.

Housing 10 is used for holding fixed cell 20, active unit 30, shell fragment 40 and supporting body 50 to be used for preventing that the interference of outer bound pair said modules also can have the function of anti-electromagnetic interference.

Fixed cell 20 comprises fixed mount 21 and four the first magnetic field generation components 22.Fixed mount 21 comprises the square floor 210 of a hollow, and four corners of base plate 210 are respectively arranged with the guide pillar 211 of equal height in the same way, the bearing of trend parallel optical axis of guide pillar 211.Base plate 210 deviates from the one side of guide pillar 211 and has four blind holes 212.Guide pillar 211 and base plate 210 define first spatial accommodation 200 and are used for accommodating active unit 30.On the base plate 210 between the fixing adjacent guide pillars 211 of the first magnetic field generation component 22 and and guide pillar 211 between have certain interval.The first magnetic field generation component 22 can be permanent magnet or electromagnet (generally comprising coil and iron core and coil winding on iron core), if be permanent magnet, then the first magnetic field generation component 22 produces constant magnetic field (being permanent magnetic field), if be electromagnet, then can produce variable magnetic field.

Active unit 30 comprises adjustable shelf 31 and four the second magnetic field generation components 32.Adjustable shelf 31 has second spatial accommodation 300 and is used for accommodating camera lens module, having four grooves, 310, the second magnetic field generation components 32 on the adjustable shelf 31 is separately fixed in the groove 310 and the second magnetic field generation component 32 corresponding first magnetic field generation components 22.Corresponding guide pillar 211 has breach 311 on the adjustable shelf 31, and guide pillar 211 is fastened in the breach 311.Have four projections 312 on the one side of adjustable shelf 31 away from breach 311.The second magnetic field generation component 32 can be permanent magnet or electromagnet, if be permanent magnet, then the second magnetic field generation component 32 produces constant magnetic field, if be electromagnet, then can produce variable magnetic field.

One of the first magnetic field generation component 22 and second magnetic field generation component 32 need to be electromagnet, and namely when the first magnetic field generation component 22 was permanent magnet, the second magnetic field generation component 32 need to be electromagnet, and vice versa.

The shape of shell fragment 40 is identical with adjustable shelf 31 with fixed mount 21, shell fragment 40 has a light hole 400, ask that having between the first through hole 41 and the second through hole 42, the first through holes 41 and the second through hole 42 around light hole 400 is that elastic part 43 and the first through hole 41 are away from light hole 400.Shell fragment 40 is by the projection 312 on the second through hole 42 and the adjustable shelf 31 and utilize gluing process to be fixed on the adjustable shelf 31.

The shape of supporting body 50 is identical with adjustable shelf 31 with fixed mount 21, four corners of supporting body 50 have respectively a projection 51, projection 51 passes the first through hole 41 of shell fragment 40 and then stretches in the blind hole 212 of fixed mount 21, and by gluing process fixed mount 21, shell fragment 40 are fixed on the supporting body 50, thereby the effect that makes adjustable shelf 31 mats live elastic part 43 is suspended in the first spatial accommodation 200 of fixed mount 21.

Certainly, shell fragment 40 can omit.When omitting shell fragment 40, the projection 51 of supporting body 50 directly is fixed in the blind hole 212 of fixed mount 21, and adjustable shelf 31 is suspended in the first spatial accommodation 200 by the frictional force between guide pillar 211 and the breach 311.In addition, the structure of corresponding shell fragment 40 can be omitted equally on the adjustable shelf 31.

When the first magnetic field generation component 22 is permanent magnet, when the second magnetic field generation component 32 is electromagnet, if do not have electric current in the second magnetic field generation component 32, then the second magnetic field generation component 32 just can not produce magnetic field, at this moment, can there be magnetic force in the permanent magnetic field that only exists the first magnetic field generation component 22 to produce in the magnetic suspension motor 100 between the first magnetic field generation component 22 and the second magnetic field generation component 32, therefore active unit 30 keeps initial position; If there is electric current to flow in the second magnetic field generation component 32, then the second magnetic field generation component 32 just can produce magnetic field, the permanent magnetic field that not only exists the first magnetic field generation component 22 to produce in the magnetic suspension motor 100, but also the variable magnetic field that exists the second magnetic field generation component 32 to produce, according to the difference that passes into the sense of current, the effect that has attracting each other between permanent magnetic field and the variable magnetic field and repel, active unit 30 is movable because fixed cell 20 is fixed on that supporting body 50 can not move, therefore, active unit 30 is just moved along guide pillar 211 in the effect of magnetic field force, thereby the motion of the Sports band index glass head module of active unit 30 has realized focusing or zoom function.

When focusing or after zoom finishes, can stop to input to the electric current of the second magnetic field generation component 32, active unit 30 can be got back to initial position under the effect of elastic part 43, perhaps input reverse current and make its magnetic field that produces opposite direction to the second magnetic field generation component 32, so that active unit 30 is got back to initial position.

When the first magnetic field generation component 22 is electromagnet, when the second magnetic field generation component 32 was permanent magnet, the operation principle of magnetic suspension motor 100 was same as above, therefore it will not go into details herein.

Because magnetic suspension motor 100 can omit shell fragment, therefore the phenomenon and the cost that do not have focusing or zoom distortion are lower; In addition, because magnet spool is wrapped on the iron core, therefore magnetic suspension motor 100 falls when realizing doing, and does not have the problem of coil damage.

Be understandable that, those skilled in the art also can do other variation etc. and be used in design of the present invention in spirit of the present invention, as long as it does not depart from technique effect of the present invention and all can.The variation that these are done according to spirit of the present invention all should be included within the present invention's scope required for protection.

Claims

1. magnetic suspension motor, be used for driving camera lens module, it is characterized in that, described magnetic suspension motor comprises fixed cell and active unit, described active unit arranges in the described fixed cell actively, described fixed cell comprises fixed mount and the first magnetic field generation component, described the first magnetic field generation component is fixed on the described fixed mount, described fixed mount has guide pillar, described active unit comprises adjustable shelf and the second magnetic field generation component, described the second magnetic field generation component is fixed on the described adjustable shelf, described adjustable shelf is used for holding described camera lens module, the breach that has corresponding described guide pillar on the described adjustable shelf, described guide pillar is fastened in the described breach, among described the first magnetic field generation component and the second magnetic field generation component at least one is the electromagnet that comprises coil and iron core, and described active unit moves along described optical axis direction in described fixed cell along described guide pillar under the effect in described the first magnetic field generation component and generation component generation magnetic field, the second magnetic field.

2. magnetic suspension motor as claimed in claim 1 is characterized in that, described the first magnetic field generation component is electromagnet, and described coil winding is on described iron core, and described the second magnetic field generation component is permanent magnet.

3. magnetic suspension motor as claimed in claim 1 is characterized in that, described the second magnetic field generation component is electromagnet, and described coil winding is permanent magnet at the above first magnetic field generation component of described iron core.

4. magnetic suspension motor as claimed in claim 1 is characterized in that, described guide pillar is four, and described fixed mount has a square base plate, and described guide pillar arranges four corners of described base plate.

5. magnetic suspension motor as claimed in claim 4 is characterized in that, described breach is four.

6. magnetic suspension motor as claimed in claim 4 is characterized in that, described magnetic suspension motor further comprises a shell fragment, and described shell fragment is fixed on the described base plate.

7. magnetic suspension motor as claimed in claim 6 is characterized in that, described magnetic suspension motor further comprises a supporting body, and described base plate is fixed on the described supporting body.

8. magnetic suspension motor as claimed in claim 7, it is characterized in that having projection on the described supporting body, have blind hole on the described base plate, have the first through hole on the described shell fragment, described projection passes described the first through hole and stretches into described blind hole so that described shell fragment is fixed on the described base plate.

9. magnetic suspension motor as claimed in claim 8 is characterized in that, described adjustable shelf has projection near an end of described base plate, and described shell fragment has the second through hole, and described projection stretches into described the second through hole so that described shell fragment is fixed on the described adjustable shelf.

10. such as the arbitrary described magnetic suspension motor of claim 1-9, it is characterized in that, described magnetic suspension motor comprises housing, is used for holding described fixed cell and active unit.