CN203811881U - Voice coil motor for integratedly assembled lens - Google Patents

Abstract

The utility model provides a voice coil motor for an integratedly assembled lens. The voice coil motor comprises a top cover, a top flat spring, a yoke, a permanent magnet, a coil, a bottom flat spring, a terminal plate and a terminal pin; a photosensitive chip is disposed on the terminal plate; a lens assembly part is also disposed in the coil; and optic series are disposed in the lens assembly part. According to the voice coil motor, a carrier, a lens and an infrared optical filter which are presently separated are integratedly assembled, an optics focus surface of a lens integrated assembly part is disposed under a photosensitive surface of the photosensitive chip, so that auto focus is achieved; and due to the integrated assembly without threads, the locking and matching torsional force problem of the lens and the voice coil motor is prevented, dust pollution generated by threads locking and matching friction is reduced, assembly tilt of the lens and the voice coil motor is alleviated, the lens is prevented from getting out of focus, and finished product height of a module is reduced. The voice coil motor is applied to an auto adjust (AA for short) camera producing process so as to improve production yield and efficiency.

Description

A kind of voice coil motor of integrated assembling camera lens

Technical field

The utility model relates to the technical field of the package assembly of voice coil motor and camera lens, particularly a kind of voice coil motor of integrated assembling camera lens.

Background technology

(Voice Coil Motor, is called for short: VCM) product structure is made up of the member of following several parts: top layer cover plate 1. (TOP COVER) existing voice coil motor; 2. top spring leaf (TOP FLAT SPRING); 3. carrier base (YOKE); 4. permanent magnet (MAGNET); 5. coil (COIL); 6. camera lens load (CARRIER); 7. bottom spring leaf (BOT FLAT SPRING); 8. end base plate (TERMINAL PLATE); 9.PIN terminal pin (TERMINAL PIN).As shown in Figure 1, voice coil motor (VCM) is mainly to power up under the acting force producing at magnet by spring leaf and coil, realizes the level and smooth and continuous movement of camera lens 21; Camera lens load 6 (CARRIER) part can be mated the camera lens that different manufacturers is produced.

Existing voice coil motor (VCM) 100 is the parts that separate with camera lens 21, and camera lens and voice coil motor VCM are fitted together by Luo tooth lock combo.Fig. 2-1st, the assembling completion status structural representation of existing voice coil motor and camera lens; Fig. 2-2nd, the assembling process schematic diagram of existing voice coil motor and camera lens.

Voice coil motor (Voice Coil Motor, is called for short: principle of work VCM) as shown in Figure 3, is applied Hooke's law and Ampère force rule, by spring leaf control shift position, wherein:

Hooke's law formula f=Kx; K is the coefficient of stiffiness of spring leaf, and x is elongation or the shortening amount (stroke) of spring leaf;

Ampère force formula F=n.BIL; N is for by the bundle number of magnetic field institute coil; B is magnetic field size, the size that I is electric current, the length of the coil of L;

Press Ampère force rule, work as n, B, L value is determined, can control the F power of the size generation of I value drive current, produces equilibrant, thereby control camera motion and position with the pulling force of this spring leaf.The figure in Fig. 3 left side is the schematic diagram before lens moving; The figure on Fig. 3 right side is the schematic diagram after lens moving.

The shortcoming of the package assembly of existing voice coil motor and camera lens is:

(1) camera lens mates with voice coil motor (VCM) the torsion problem that need pay close attention between the two; The large fragile voice coil motor of torsion (VCM), torsion tiny lens easily runs Jiao;

(2) the PC material of camera lens and voice coil motor (VCM) lock timing camera lens (LENS) itself and camera lens load (CARRIER) the PC material Luo tooth of voice coil motor (VCM); Easily produce lock and join dust, thereby pollute whole module;

(3) taking 1,300 ten thousand pixels as example; Voice coil motor (VCM) in order to reduce the value of assembling rear-inclined (TILT), is designed to 0.25Pitch (common 1,300 ten thousand pictures following be 0.3pitch) by Luo tooth size with camera lens (LENS) factory; But also easily produce inclination (TILT) value of voice coil motor (VCM) and camera lens (LENS) in the timing of reality lock, thereby affect the image quality of camera.Fig. 4-1,4-2 are the heeling condition schematic diagram of voice coil motor and lens lock timing; Fig. 4-1st, nonangular schematic diagram when voice coil motor (VCM) assembles with camera lens (LENS); Fig. 4-2nd, voice coil motor (VCM) has the schematic diagram of inclination while assembling with camera lens (LENS).

Utility model content

The utility model provides a kind of voice coil motor of integrated assembling camera lens, the technical matters solving is: existing camera lens load, camera lens and the infrared fileter separating carried out to integrated assembling, the optical focusing face of lens integrated assembling parts is arranged on to the below of the light-sensitive surface of described sensitive chip, realizes focusing automatically; Without the integrated assembling of Luo tooth, avoid the lock of camera lens and voice coil motor to join torsion problem, reduce when Luo tooth lock is joined friction and produce dust pollution, the assembling that alleviates camera lens and voice coil motor is tilted, and avoids camera lens to run burnt, reduces the finished product height of module.

In order to solve the problems of the technologies described above, technical solution adopted in the utility model is:

A kind of voice coil motor of integrated assembling camera lens is provided, described voice coil motor comprises top layer cover plate, top spring leaf, carrier base, permanent magnet, coil, bottom spring leaf, end base plate, terminal pin, on base plate, be provided with sensitive chip endways, in described coil, be also provided with lens assembling parts, in described lens assembling parts, be provided with lens imaging lens set.

Further, the optical focusing face of described lens imaging lens set is arranged on the below of the light-sensitive surface of described sensitive chip.

Further, be provided with light hole at the top of described lens assembling parts, its bottom is fixed with infrared fileter.

Further, described lens assembling parts are black dumb light framework.

The technique effect that the voice coil motor of the integrated assembling camera lens that the utility model provides obtains is:

(1) integrated lens assembling parts adopts without the design of Luo tooth, can avoid the lock of camera lens and voice coil motor (VCM) to join torsion problem, joins without carrying out torsion lock; There is not the phenomenon of turning round bad camera lens or voice coil motor (VCM);

(2) can not produce and while joining friction because of voice coil motor (VCM) and camera lens (LENS) Luo tooth lock, produce dust; Reduce pollution source, thereby improve the yield of whole module product;

(3) inclination (TILT) producing while reducing camera lens (LENS) with voice coil motor (VCM) assembling; Alleviate one of factor that tilts to produce, thereby improve the image quality of product;

(4) there will not be camera lens to mix up Jiao and run burnt phenomenon afterwards, effectively improve the yield of finished product;

(5) effectively reduce the finished product height of module, meet client and pursue the demand of ultra thin handset or other electronic products;

(6) can coordinate automatic adjustment (Auto adjust, be called for short: AA) camera procedure for producing does the preliminary work in early stage, so just not be used in camera lens factory and go to measure inclination (TILT) value after camera lens (LENS) is assembled with voice coil motor (VCM), and obtain camera lens (LENS) height and position (HOME POSITION) accurately after assembling, thereby improve efficiency and the yield of automatically adjusting (AA) processing procedure.

Brief description of the drawings

Fig. 1 is the structural representation of existing voice coil motor;

Fig. 2-1st, the assembling completion status structural representation of existing voice coil motor and camera lens;

Fig. 2-2nd, the assembling process schematic diagram of existing voice coil motor and camera lens;

Fig. 3 is the principle of work schematic diagram of existing voice coil motor;

Fig. 4-1st, nonangular schematic diagram when voice coil motor (VCM) assembles with camera lens (LENS);

Fig. 4-2nd, voice coil motor (VCM) has the schematic diagram of inclination while assembling with camera lens (LENS);

Fig. 5 is the structural representation of the voice coil motor of integrated assembling camera lens of the present utility model;

Fig. 6-1, Fig. 6-2 are respectively the lens assembling parts of released state and the structural representation of voice coil motor;

Fig. 7-1st, the front view of described lens assembling parts of the present utility model;

Fig. 7-2nd, the side view of described lens assembling parts of the present utility model;

Fig. 7-3rd, the rear view of described lens assembling parts of the present utility model;

Fig. 8 is the initialization schematic diagram of the voice coil motor of the integrated assembling camera lens of the utility model;

Fig. 9 is the lens focusing schematic diagram of the voice coil motor of the integrated assembling camera lens of the utility model;

Figure 10-1st, the view before lens assembling parts move;

Figure 10-2nd, the view after lens assembling parts move.

Embodiment

Specifically illustrate embodiment of the present utility model below in conjunction with accompanying drawing, accompanying drawing is only for reference and use is described, does not form the restriction to the utility model scope of patent protection.

As shown in Figure 5, embodiment of the present utility model relates to a kind of voice coil motor of integrated assembling camera lens, described voice coil motor comprises top layer cover plate 1, top spring leaf 2, carrier base 3, permanent magnet 4, coil 5, bottom spring leaf 7, end base plate 8, terminal pin 9, on base plate 8, be provided with sensitive chip endways, in described coil 5, be also provided with lens assembling parts 6, in described lens assembling parts 6, be provided with lens imaging lens set (optic series) 61.In Fig. 5, also indicate field angle A.

Fig. 6-1, Fig. 6-2 are respectively the lens assembling parts of released state and the structural representation of voice coil motor; Be provided with light hole 63 at the top of described lens assembling parts 6, light hole 63 is for by the light of incident; Its bottom is fixed with infrared fileter 62.Fig. 7-1 shows the structure at described lens assembling parts 6 tops, is the front view of described lens assembling parts 6, is also provided with activity orientation hole 64 at described lens assembling parts 6 tops four jiaos; Fig. 7-2nd, the side view of described lens assembling parts 6; Fig. 7-3 show the structure of described lens assembling parts 6 bottoms, are the rear views of described lens assembling parts 6.In the present embodiment, described lens assembling parts 6 (barrel) are black dumb light framework.

In structural design, existing voice coil motor VCM IR (Infrared Radiation) infrared fileter used is arranged on support (HOLDER), the IR infrared fileter of integrated assembling is directly with focusing (Auto Focus) automatically, be called for short: the camera lens of AF movable part is integrated, aspect space, can save the size of support (HOLDER) dress IR infrared fileter part, at camera lens effective focal length (Effective Focal Length, EFL) with back focal length (Back Focal Length, BFL) in scope, can design more Bao Jingtou overall length (Total Track Length, be called for short: camera lens LENS TTL) joins ultra-thin integrated voice coil motor VCM product.

The design of opticator be with the parts 6 of camera lens (LENS) one assembling in, as shown in Figure 8, at reference position (HOME POSITION, in diagram, be HP) initial bit of design VCM spring leaf, before namely voice coil motor VCM100 work, be assemblied in 0 fixing original position.In Fig. 8, indicate focusing direction of motion FD.

Before voice coil motor VCM100 work, as shown in Figure 9, the below of the sensitization DIE face (the sensitization wafer face of chip) 101 that the focusing 60 of the best distant view of camera lens designs at sensitive chip SENSOR.Therefore,, in embodiment of the present utility model, the optical focusing face of described lens imaging lens set 61 is arranged on the below of the light-sensitive surface 101 of described sensitive chip.

As shown in Figure 10-1,10-2, by voice coil motor VCM is added to current work, can be correct camera lens LENS focusing be focused on the sensitization DIE face of sensitive chip SENSOR accurately, thus realize the automatic focusing function of the voice coil motor of the integrated assembling camera lens of the utility model.Figure 10-1st, the view before lens assembling parts 6 move; Figure 10-2nd, the view after lens assembling parts 6 move.

Wherein F indicates driving force, and f indicates spring force.

Above disclosed is only preferred embodiment of the present utility model, can not limit rights protection scope of the present utility model with this, and the equivalent variations of therefore doing according to the utility model claim, still belongs to the scope that the utility model is contained.

Claims (4)

1. the voice coil motor of an integrated assembling camera lens, described voice coil motor comprises top layer cover plate (1), top spring leaf (2), carrier base (3), permanent magnet (4), coil (5), bottom spring leaf (7), end base plate (8), terminal pin (9), on base plate (8), be provided with sensitive chip endways, it is characterized in that: in described coil (5), be also provided with lens assembling parts (6), in described lens assembling parts (6), be provided with lens imaging lens set (61).

2. the voice coil motor of integrated assembling camera lens according to claim 1, is characterized in that:

The optical focusing face of described lens imaging lens set (61) is arranged on the below of the light-sensitive surface (101) of described sensitive chip.

3. the voice coil motor of integrated assembling camera lens according to claim 1, is characterized in that:

Be provided with light hole (63) at the top of described lens assembling parts (6), its bottom is fixed with infrared fileter (62).

4. the voice coil motor of integrated assembling camera lens according to claim 1 and 2, is characterized in that:

Described lens assembling parts (6) are black dumb light framework.