CN102411188B - Lens Driving Device, Camera Capable Of Automatically Focusing And Mobile Terminal Having Photo Taking Function - Google Patents

Abstract

The invention provides a lens driving device, a camera capable of automatically focusing and a mobile terminal having a photo taking function. In the invention, the deformation of power supply terminals can be avoided and the devices can be assembled easily. In the lens driving device (1), after a coil (19) is supplied with power through a spring (11), a lens supporting body (5) moves back and forward along an optical axis direction of the lens by an electromagnetic force generated between the coil (19) and an opposite magnet (13). A pedestal (8) is made of insulation material and the outer periphery is provided with metal face parts (33, 35). A rear side spring (11) connects with the metal face parts (33, 35) through a material (23). The metal face parts (33, 35) work as the power supply terminals. The metal face part (33, 35) are formed by bonding metal adhesive tape coated with gold and metal films on the pedestal.

Description

Lens driver, auto-focus camera and the mobile terminal with camera function

Technical field

The present invention is the mobile terminal apparatus of relevant a kind of lens driver, auto-focus camera and subsidiary camera function.So-called end device refers to mobile phone, portable data assistance (PDA), notebook computer etc.

Background technology

In patent document 1 (the open JP2005-173431 communique of patent), having disclosed the lens supports body of coiling coil in periphery maintains movably by the leisure of spring energy, coil is connected on spring, from spring to coil, circulates into the situation of electric current.In the technology of this patent document 1, on spring, power supply terminal is integrally formed after, from base, make power supply terminal outstanding.

On patent document 2 (the open 2009-216878 communique of patent) and patent document 3 (the open 2010-61030 communique of patent), disclosed power supply terminal outstanding from base different with the material of spring and base, power supply terminal is connected in the situation on spring.

Summary of the invention

But, in the technology of patent document 1, in order to obtain certain elastic property, be necessary the thickness of spring to do thin, the thickness of power supply terminal integrally formed on spring also to certainly will be attenuated like this, so power supply terminal can easily produce the unfavorable condition of distortion.

To this, in the technology ofpatent document 2 and 3, power supply terminal is made and independently material of spring phase, so can set out the thickness a kind of and power supply terminal that thickness spring differentiates in addition.But, will cause like this component increase of counting, between terminal and spring, be necessary to be connected with each other, assembling also becomes difficulty.

Therefore, the present invention is that distortion, component for preventing power supply terminal counted less and assemble that to be easy to the mobile terminal of lens driver, auto-focus camera and subsidiary camera function be object.

For realizing the lens driver of described object, be included as the lens supports body of support of lens, the coil arranging in the periphery of lens supports body, magnetite with coil subtend, coil power on gas connect in, can keep lens supports body to make the spring moving freely, and the base of keep-spring, it is characterized in that: according to spring, to the electromagnetic force producing after coil power supply, lens supports body moves forward and backward along the optical axis direction of lens; Base is that insulating material is made and outer peripheral face has metal face, and spring is connected by following material with above-mentioned metal face, and above-mentioned metal face is as power supply terminal.

Base has metal face on outer peripheral face, so the base metal of keep-spring face and spring for example, just can then be fixed by the then material (solid) of electric conductivity, metal face can be used as power supply terminal, and assembling just becomes easy.Metal face is because same base is one, and becomes relatively stable, and the then Job Operations between spring can become easy.

Metal face is set on the outer peripheral face of base, is supported, so also can realize even if the thickness of metal face is thinner the distortion that prevents power supply terminal by base.

Metal face is integrated with base, so there is no need to increase other feeder terminal portion material, so can reduce component, counts again.

Described lens driver, its further feature is that above-mentioned metal face is after a plated film of base outer peripheral face, to form.A part for base is that metal-plated is film formed, so metal face can easily form.

Described lens driver, its further feature is that base loads spring in peripheral part, forms the then material reservoir of concavity in the mounting surface of spring.Then the material reservoir of concavity can prevent that then material overflows, and meanwhile, can improve the Bonding strength between metal face and spring.

Described lens driver, its further feature is that the connection of above-mentioned metal face is set in the then bottom surface of material reservoir.The connection of above-mentioned metal face is set in the then bottom surface of material reservoir can strengthen the fiduciary level that the electrical resistance between metal face and spring connects.

For realizing the focusing automat of described object, be characterized in possessing the lens driver described in any one, on the power supply terminal being set on circuit substrate, connect the metal face of base.It can obtain the technique effect identical with aforementioned lens driver.

For realizing the mobile terminal of subsidiary camera function of described object, be characterized in, be equipped with aforesaid auto-focus camera.It can obtain the technique effect identical with aforementioned focusing automat.

Accompanying drawing explanation

[Fig. 1]: (a) be the axle survey view of an extraction lens driver part for relevant the 1st example.(b) be C-C sectional view in (a).

[Fig. 2]: (a) be the axle survey view of the base of the extraction lens driver of relevant the 1st example.(b) be B-B sectional view in (a).

On the base that [Fig. 3]: Fig. 2 shows, coat the axle of the state after solid and survey view.

[Fig. 4]: the exploded isometric view of the lens driver of relevant the 1st example.

The A-A sectional view that [Fig. 5]: Fig. 6 shows.

[Fig. 6]: the schematic axle that shows the lens driver of the 1st example is surveyed view.

[Fig. 7]: the datum axle that shows the lens driver of the 2nd example is surveyed view.

[Fig. 8]: the schematic cross-section of coupling part between the metal face in the lens driver of demonstration the 2nd example and spring.

1 lens driver

3 collar extensions

5 lens supports bodies

8 bases

11 rear side springs

13 magnetites

19 coils

Then material of 23 conductions

33,35 metal faces

37 follow material accumulates

Embodiment

Below, with reference to annex map 1～Fig. 6, the 1st example of the present invention is described in detail.The lens driver 1 that this example is relevant is a kind of lens driver that is assembled into the auto-focus camera in mobile phone.

This lens driver 1 is as shown in Figure 4, have ring-type collar extension 3, lens supportsbody 5, be configured in front side spring 9 on the optical axis direction front side ofcollar extension 3, be configured in the front side of front side spring 9framework 7, be configured inbase 8 and rear side spring 11 on the rear side of collar extension 3.Rearside pad 15 is configured between rear side spring 11 andcollar extension 3.

Collar extension 3 sees that from front side its periphery is planar square.Interior all planes are seen as circle.It consists of outerperipheral sidewall 3a, innercircumferential side wall 3b, outerperipheral sidewall 3a and the connectingwall 3c that innercircumferential side wall 3b is connected separately.Outerperipheral sidewall 3a, innercircumferential side wall 3b, its cross section of connectingwall 3c are コ shape.On thewall 3b of inner circumferential side, from rear side end face forward, be formed with cut portion 12.Cut portion 12, in the first-class arranged spaced of Zhou Fangxiang, in this example, in the outerperipheral sidewall 3a of planar square, is arranged on corresponding adjacent corners 14(limit part) position on.

In each bight 14 ofcollar extension 3, on the inner peripheral surface of outerperipheral sidewall 3a, be fixed with magnetite 13.Magnetite 13 is arranged in bight 14, on the corresponding position of cut portion 12 not forming atinternal perisporium side 3b.

Slightly drum of lens supportsbody 5, in it, perimembranous is being unkitted lens (without diagram), in the inner circumferential side ofcollar extension 3, along optical axis direction, is arranged to move freely.In the periphery of lens supportsbody 5, fix thecoil 19 of ring-type.

As shown in Figure 5,coil 19 is configured between the outerperipheral sidewall 3a and innercircumferential side wall 3b ofcollar extension 3, andmagnetite 13 is in bight 14, betweenmagnetite 13 and inner circumferential side wall 3b.With lens supportsbody 5 together, at the interior fore-and-aft direction ofcollar extension 3, move.

As shown in Figure 4, front side spring 9 is ring-type leaf spring.Be provided with the 9a of inner circumferential side portion and periphery sidepiece 9b, the 9a of inner circumferential side portion is fixed on lens supportsbody 5, and periphery sidepiece 9b is clamped and fastened betweencollar extension 3 and framework 7.The 9a of inner circumferential side portion is connected by the elastically-deformable wrist 9c of energy with periphery sidepiece 9b.

Rear side spring 11 entirety are the leaf spring of ring-type.But in this example, by a sidepiece 20 and the other side 22 of left and right separation shape, formed.Eachperiphery sidepiece 11b of rear side spring 11 is clamped betweenbase 5 andcollar extension 3 with therear side pad 15 of insulator simultaneously.Rearside pad 15 has played the electrical resistance insulating effect between rear side spring 11 and collar extension 3.Each inner circumferential side 11a of portion is fixed on the rear end of lens supports body 5.Each inner circumferential side 11a of portion of rear side spring 11 is connected by thewrist 11c of elastically deformable withperiphery sidepiece 11b.

Base 8 peripheries see that from optical axis direction plane is square.Interior week is the insulative resin material that toroidal forms.In the periphery ofbase 8, the 8a of foot erects on each bight, and the 7a of foot offramework 7 is chimeric fixing.On the square outer peripheral face ofbase 8, on one side, adjacent 2 the metal faces 33,35. that are formed with

In addition, though do not illustrate, a sidepiece 20 of rear side spring 11 is connected oncoil 19, and the other side 22 of rear side spring 11 is connected to the other end ofcoil 19.

As shown in Figure 1, ametal face 33 is being followedmaterial 23 containing filling electric conductivity on thespring mounting surface 8b of each metal anterior end.In electric conductivity, follow onmaterial 23, be placed with theperiphery sidepiece 11b of a sidepiece 20 of rear side spring 11, ametal face 33 is connected with theperiphery sidepiece 11b of the other side 20.Equally, according to electric conductivity, followmaterial 23, theperiphery sidepiece 11b of the other side 22 is connected in the anterior end of anothermetal face 35.

Therefore,, in this example,metal face 33 and anothermetal face 35, has the function to coil 19 circulating currents as power supply terminal.

Next, assembling, effect and the effect of the associated lens drive unit 1 to the 1st example describe.

Being assembled into of lens driver 1, first, in a part for the outer peripheral face of thebase 8 of resin forming, carry out copper gold-plated after, form the gold-platedmetal face 33,35 of copper as shown in Figure 2.Next, as shown in Figure 3, in the front side end ofmetal face 33,35, contain into electric conductivity and followmaterial 23.

As shown in Figure 1, in the assembling ofbase 8 and rear side spring 11, theperiphery sidepiece 11b of front side spring 11 is given as security to connect to be fixed on and onbase 8 outer peripheral faces, contained electric conductivity and follow (front side) onmaterial 23.

Specifically, be on ametal face 33, theperiphery sidepiece 11b of a sidepiece 20 that forms rear side spring 11 is followed.On anothermetal face 35, theperiphery sidepiece 11b of the other side 22 that forms rear side spring 11 is followed fixing.

Next, on thebase 8 ofperiphery sidepiece 11b of having fixed rear side spring 11, as shown in Figure 4, successively the fixingrear side spring 15 of assembling,coil 19 is fixed on to lens supportsbody 5 on outer peripheral face,magnetite 13 is fixed on tocollar extension 3, front side spring 9 and theframework 7 on the face of inner circumferential side.

Then, by one end ofcoil 19 by solid or be welded to connect on the 11a of inner circumferential side portion of a sidepiece 20 that forms rear side spring 11.The other end ofcoil 19 is by solid or be welded to connect on the 11b of inner circumferential side portion of the other side 22 that forms rear side spring 11.

The lens driver 1 of relevant this example is equipped on mobile phone, and ametal face 33 and anothermetal face 35 are as power supply terminal, and its rear side end is for example connected on the power supply terminal (without diagram) of circuit substrate (without diagram) by modes such as welding.

Lens driver 1 is when driving, its DC current is flowed through successively and to be started from themetal face 33 being connected to the power supply terminal of substrate, later the other side 22 of a sidepiece 20 of side spring 11,coil 19, rear side spring 11, be connected to anothermetal face 35 on the power supply terminal of circuit substrate.Now,base 8 is insulator, becausemetal face 33 is with configured separate betweenmetal face 35, so, betweenmetal face 33 andmetal face 35, to get involved afterbase 8, electric current is missed and cannot be circulated.

So, to coil 19, be electrified stream, by the electromagnetic force acting on to coil 19, lens supportsbody 5 will resist mutually after the precompression of front side spring 9 and rear side spring 11 and moves, and the power between same front side spring 9 and rear side spring 11 stops while reaching phase equilibrium locations point.

According to the 1st example of the present invention,base 8 hasmetal face 33,35 on outer peripheral face, so follow only thenmetal face 33,35 and the rear side spring 11 offirm banking 8 ofmaterial 23 according to electric conductivity, just can realize usingmetal face 33,35 as power supply terminal use, assemble simple.

Metal face 33,35 is because withbase 8 one, so very stable.With the then operation between rear side spring 11, can easily carry out.

Because each back side entirety ofmetal face 33,35 all obtains the support ofbase 8, so, even if the thinner distortion that also can prevent power supply terminal of the thickness ofmetal face 33,35.

Metal face 33,35, because withbase 8 one, there is no need to want other feeder terminal portion material again, so component is counted, has reduced.

Metal face the 33, the 35th, gold-plated formation on one ofbase 8, so that the formation of metal face just becomes is easy.

According to this example, theperiphery sidepiece 11b of rear side spring 11 loads in the front side end of the periphery edge ofbase 8, is connected on each metal covering 33,35, connects operation and easily realizes.

Next, other state of the present invention is described, in the enforcement state of following explanation, is playing the part of same function effect with the 1st above-mentioned example, by prosign, omit the detailed description of its part, below explanation is mainly to implement the difference of state with the 1st.

With reference to Fig. 7 and Fig. 8, the 2nd example of the present invention is described.As shown in Figure 7, in the lens driver 1 of relevant the 2nd example, at the peripheral part ofbase 8, it is upper that correspondingmetal face 33,35 is formed with ground part, is formed with separately respectively the thenmaterial reservoir 37 of concavity.Outer circumferential side andspring mounting surface 8b side that respectively then themetal face 33,35 ofmaterial reservoir 37 forms are carried out opening, andmetal face 33,35 is connected to form in following on the bottom surface ofmaterial reservoir 37.

According to this 2nd example, onbase 8, be formed with then material reservoir 37.When preventing that then material overflows, can improve the Bonding strength betweenmetal face 33,35 and rear side spring 11.

33,35 connections of metal face are set on the bottom surface of followingmaterial 37, so can strengthen the fiduciary level that the electrical resistance betweenmetal face 33,35 and rear side spring 11 connects.

Portion of the present invention is defined in above-mentioned example, only otherwise depart from main idea of the present invention, can do all distortion.For example, in above-mentioned example, metal face the 33, the 35th, adjacent setting, be not limited to this, mutually mutually from setting, on periphery is polygon-shaped base, to set different limits also passable.

Metal face 33,35 is not limited to gold-plated, and metal film, the film formed adhesive tape of metal are also passable.In addition,metal face 33,35 also can arrange with printing type.

In addition,metal face 33,35 can be set for and extend to spring mountingsurface 8b above, also can set the ground that extends tobase 8 for.Particularly, in the 1st example,metal face 33,35 and the conduction then contact area betweenmaterial 23 can increase, and can guarantee stable electric conductivity.

Onbase 8, the partial shape that metal face is formed is made the same the same shape of power supply terminal in the past.Now, in lens driver 1, terminal part can be used as power supply terminal as in the past and processes.

Claims (6)

1. lens driver, be included as the lens supports body of support of lens, the coil arranging in the periphery of lens supports body, magnetite with coil subtend, coil power on gas connect in, can keep lens supports body to make the spring moving freely, and the base of keep-spring, it is characterized in that: according to spring, to the electromagnetic force producing after coil power supply, lens supports body moves forward and backward along the optical axis direction of lens; Base is that insulating material is made and outer peripheral face has metal face, and spring is connected by the then material of electric conductivity with above-mentioned metal face, and above-mentioned metal face is as power supply terminal.

2. lens driver as claimed in claim 1, is characterized in that, above-mentioned metal face is after a part of plated film of base outer peripheral face, to form.

3. lens driver as claimed in claim 2, is characterized in that, base loads spring in peripheral part, forms the then material reservoir of concavity in the mounting surface of spring.

4. lens driver as claimed in claim 3, is characterized in that, the connection of above-mentioned metal face is set in the then bottom surface of material reservoir.

5. focusing automat, is characterized in that, possesses the lens driver that any one in claim 1～claim 4 is recorded, and connects the metal face of base on the power supply terminal being set on circuit substrate.

6. the mobile terminal of subsidiary camera function, is characterized in that, is equipped with the auto-focus camera that claim 5 is recorded.

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