CN2735643Y

CN2735643Y - A linear motor for image pick-up lens

Info

Publication number: CN2735643Y
Application number: CN 200420072303
Authority: CN
Inventors: 严松涛; 胡伟
Original assignee: WEIDALI INDUSTRY (SHENZHEN) Co Ltd
Current assignee: WEIDALI INDUSTRY (SHENZHEN) Co Ltd
Priority date: 2004-08-02
Filing date: 2004-08-02
Publication date: 2005-10-19
Anticipated expiration: 2014-08-02

Abstract

The utility model is a linear motor for imaging lens, comprising a stator, a rotor and a control circuit. The rotor and the stator are as tubular shape, and a lens combination is arranged in the rotor and provided in the stator; the lens combination can have relative linear motion with the stator; a sensitive component is arranged behind the lens combination; and the control circuit comprises a micro-processing chip which is used to drive and control the rotor. The product of the utility model saves the space of arranging a drive motor on the lens, thereby, making the volume of the whole lens reduce. The utility model realizes the automatic focusing function, and the utility model is in particular applied into mobile phone pick-up lens conveniently.

Description

A kind of linear electric motors that are used for pick-up lens

Technical field

The utility model relates to a kind of pick-up lens, relates in particular to a kind of improvement of Drive Structure of cell-phone camera camera lens.

Background technology

Along with the development of digital vedio recording technology, realize that a plurality of equipment of difference in functionality merge development to same equipment gradually, technically, it is fully possible that this multi-functional equipment occurs.For example the camera function of mobile phone because the volume requirement of mobile phone is little, makes the improvement of pick-up lens is carried out around volume that after the camera lens of small-volume and multifunctional developed out, the shooting that utilizes mobile phone to carry out digital photograph was possible fully.

But how the pick-up lens of the ordinary digital camera of prior art does not consider the volume problem, therefore, the focusing of its pick-up lens and zoom drive structure have adopted the camera lens side to increase the mode of drive motors mostly, lens construction as shown in Figure 1, generally be to be provided with sensitive component 120, carry out sensitization and read by 120 pairs of imagings of this sensitive component in the rear end of set of lenses 110; And in the pick-up lens evolution of mobile phone,, produce design manufacturer to rack one's brains, but in the so little volumetric spaces of mobile phone, still can't realize functions such as outstanding automatic focus, autozoom for realizing the reduced volume enhancement function.The automatic focus function of the pick-up lens of prior art generally is to adopt traditional electrical magneto, stepping motor to realize, so its volume is generally very big.

At present mobile phone focus module the common realization flow of imaging function as shown in Figure 2, idiographic flow is as follows:

The light signal that optical system will be caught from the external world, be imaged on the sensitive component, sensitive component 120 perception after the described optical system also are converted to the signal of telecommunication with light signal, and to digital signal processor (Digital Signal Processors, DSPs) send data, by this DSP (ISP) data are handled, and be presented on the LCD.

In the above-mentioned imaging process, owing to focal length is fixed, when subject is not in field depth, unintelligible two aspects of to sum up stating of image meeting, there is defective in prior art, and awaits improving and development.

The utility model content

The purpose of this utility model is to provide a kind of linear electric motors that are used for pick-up lens, by with the driving linear electric motors that are wholely set of optical lens, the AF camera lens volume that overcomes on the prior art camera is big, can't be applied to the little product of volume requirement as the defective on the pick-up lens of mobile phone.

The technical solution of the utility model is as follows:

A kind of linear electric motors that are used for pick-up lens, it comprises a stator and a rotor, wherein, described rotor and described stator are tubular, are provided with set of lenses in the described rotor, and are positioned at described stator, can with described stator linear relative movement; Be provided with sensitive component after the described set of lenses; And a control circuit, it comprises a little process chip, is used for the drive controlling to described rotor.

Described linear electric motors, wherein, described linear electric motors are supersonic motor.

Described linear electric motors, wherein, closely pressing between described stator and the described rotor is to produce precompression between described stator and described rotor.

Described linear electric motors wherein, are provided with a joint face and a connection assist between described stator and the described rotor, be used for producing precompression on described joint face.。

Described linear electric motors, wherein, described stator can be set to two parts vertically; Simultaneously described rotor includes former and later two parts, and each part is provided with a set of lenses, and respectively with the linear electric motors of two groups of the corresponding compositions of two parts of described stator; Described two groups of linear electric motors are subjected to the control of different control circuits, make together rectilinear motion or do linear relative movement of described two rotors.

A kind of linear electric motors that are used for pick-up lens provided by the utility model, owing to adopted the inside and outside tube that on pick-up lens, is provided with, this inside and outside tube is the lens barrel of camera lens, be the rotor and the stator of drive motors simultaneously, so just saved drive motors and on camera lens, the space has been set, thereby make whole pick-up lens volume-diminished, and realized automatic focus function.

Description of drawings

Fig. 1 is the structural principle schematic diagram of the digital vedio recording camera lens of prior art;

Fig. 2 is the image-forming principle schematic diagram that focuses pick-up lens of prior art;

Fig. 3 A and Fig. 3 B are the structural representation of first preferred embodiment of the linear electric motors that are used for pick-up lens of the present utility model;

Fig. 4 A and Fig. 4 B are second preferable for the linear electric motors that are used for pick-up lens of this utility model

The structural representation of embodiment;

Fig. 5 A and Fig. 5 B are the 3rd preferred embodiment that is used for the linear electric motors of pick-up lens of the present utility model;

Fig. 6 is the control flow schematic diagram of pick-up lens of the present utility model.

Embodiment

Below preferred embodiment of the present utility model is described in detail.

A kind of linear electric motors that are used for pick-up lens of the present utility model, shown in Fig. 3 A and Fig. 3 B, only show the pattern diagram of pick-up lens among the figure, it comprises a stator 210 and a rotor 220, described rotor 220 and described stator 210 all are tubular, be provided with set of lenses 230 in the described rotor 220, and described rotor 220 is positioned at described stator 210, can with described stator 210 linear relative movements; Be provided with sensitive component 240 after the described set of lenses 230; And a control circuit, it comprises a little process chip, is used for the drive controlling to described rotor 220.Above-mentioned design of the present utility model be with inside and outside lens barrel respectively with the rotor or the stator integrated setting of drive motors, can utilize mutual actuating force between the inside and outside lens barrel to realize the linear relative movement of inside and outside lens barrel.Be preferably, described drive motors can adopt ultrasonic linear motor, because the control precision of supersonic motor is bigger, controls sensitivity, obviously has the unexistent beneficial effect of common electric machine.

Because supersonic motor need produce a precompression on the plane that actuating force produces when work, therefore, described linear electric motors of the present utility model, between described stator 210 and described rotor 220, can carry out tight pressing, and at contact-making surface coating one deck high-abrasive material, shown in Fig. 5 A and Fig. 5 B; Also can be with described rotor 220 to a side of described stator against forming joint face, opposite side increases and drives connector 260, to produce precompression on joint face; A plurality of connectors perhaps are set, wherein section connecting element is for to make with stator one material, produce joint face with described rotor, the connector of relative position produces auxiliary precompression, can on described joint face, can produce actuating force like this with the axially parallel of described stator and rotor, thereby make the straight-line displacement on the barrelshift direction of described set of lenses, drop on imaging definition on the described sensitive component in order to adjustment, the position of imaging surface and described sensitive component is matched, and whole camera lens is because the rotor of drive motors and stator and lens barrel unite two into one, volume dwindles greatly, can be applied on the camera of mobile phone.

As shown in Figure 6, the control flow of described pick-up lens of the present utility model is: at first after opening camera lens, optical system imaging is on described sensitive component 240, this sensitive component 240 is according to the imaging situation of camera lens over against scenery, send the scenery signal that is read to digital signal processor DSP, one AF (Auto Focus) judging unit at first is set in described digital signal processor, the definition of scenery is judged; If it is unintelligible then send signal to the little process chip of the described pick-up lens drive motors of control, described little process chip is sent the control command of the flexible fine setting of this pick-up lens of control, being that rotor is to correct direction rectilinear motion adjustment with inner core, and then judge by the AF judging unit of described DSP, the circulation aforesaid operations until make lens at current scenery can be on described sensitive component imaging clear.Then, under the situation of the AF of described DSP judgment unit judges imaging satisfaction, the scenery signal is handled data to digital signal processor DSP (ISP), and be presented on the LCD.So realize auto-focus process.

The linear electric motors that are used for pick-up lens described in the utility model, its another embodiment is shown in Fig. 4 A and Fig. 4 B, can also realize simultaneously focusing the automatically function of AF and zoom, described stator 210 is set to two parts 211,212 vertically, and this two-part size can have difference; Simultaneously 220 of described rotors include former and later two

parts

221 and 222, and each part of this rotor all is provided with a set of lenses, and respectively with the linear electric motors of two groups of the corresponding compositions of two parts of described stator; Described two groups of linear electric motors are subjected to the control of different control circuits simultaneously, like this, in control procedure, can control described front and back two parts rotor drive set of lenses relative motion separately, adjust zoom this moment; Also can control described front and back two parts rotor drive set of lenses separately and do as a whole moving, keep the relative distance between two parts rotor constant this moment, is the realization of focusing AF function automatically.Precompression producing method between concrete every group of linear electric motors in the present embodiment can not repeat them here with reference to the explanation of previous embodiment.

Need to prove, above-mentioned linear electric motors have carried out changing significantly to the rotor of motor and the structure of stator when utilizing ultrasonic motor, though used the principle of prior art ultrasonic motor, the structure of motor especially with pick-up lens inside and outside the design feature that is wholely set of lens barrel have the meaning of starting.

It should be noted that simultaneously, when the common structrual description of drive motors, stator refers to such an extent that be standing part, and rotor often refers to such an extent that be a moveable part that rotates around this stator, and we are referred to as " stator " at standing part described in the described linear electric motors of the present utility model, and the moveable part that straight line moves on this standing part we be referred to as " rotor ".

Should be understood that, for those of ordinary skills, can be improved according to the above description or conversion, and all these improvement and conversion all should belong to the protection range of the utility model claims.

Claims

1, a kind of linear electric motors that are used for pick-up lens, it comprises a stator and a rotor, it is characterized in that, described rotor and described stator are tubular, are provided with set of lenses in the described rotor, and are positioned at described stator, can with described stator linear relative movement; Be provided with sensitive component after the described set of lenses; And a control circuit, it comprises a little process chip, is used for the drive controlling to described rotor.

2, linear electric motors according to claim 1 is characterized in that, described linear electric motors are supersonic motor.

3, linear electric motors according to claim 2 is characterized in that, closely pressing between described stator and the described rotor is to produce precompression between described stator and described rotor.

4, linear electric motors according to claim 2 is characterized in that, are provided with a joint face and a connection assist between described stator and the described rotor, are used for producing precompression on described joint face.

5, according to the described linear electric motors of the arbitrary claim of claim 1～4, it is characterized in that described stator can be set to two parts vertically; Simultaneously described rotor includes former and later two parts, and each part is provided with a set of lenses, and respectively with the linear electric motors of two groups of the corresponding compositions of two parts of described stator; Described two groups of linear electric motors are subjected to the control of different control circuits, make together rectilinear motion or do linear relative movement of described two rotors.