CN109581617A - A driving structure and a periscope camera module - Google Patents

本发明涉及摄像头驱动装置技术领域，具体涉及一种驱动结构及潜望镜式摄像模组。驱动结构包括座体、载体、第一定子和第一动子，座体用于安装沿光轴设置，且相互对应的第一镜头和液态镜头；载体可朝向或远离第一镜头移动的设置在座体内，载体在移动时可与液态镜头的移动板抵接，驱动移动板移动以调节液态镜头的曲率；第一定子位于载体沿光轴方向的左右两侧的固定设置在座体内；第一动子位于载体沿光轴方向的左右两侧的固定设置在载体上，与第一定子对应设置，第一定子驱动第一动子运动，第一动子包括位于载体上部的两个第一上动子，和位于载体下部的两个第一下动子。本发明的驱动结构具有防抖效果好，厚度较小的优点。

The present invention relates to the technical field of camera driving devices, and in particular to a driving structure and a periscope camera module. The driving structure includes a seat, a carrier, a first stator and a first mover. The seat is used to install a first lens and a liquid lens that are arranged along the optical axis and correspond to each other; the carrier is arranged in the seat so as to be movable toward or away from the first lens, and the carrier can abut against the movable plate of the liquid lens when moving, driving the movable plate to move to adjust the curvature of the liquid lens; the first stator is located on the left and right sides of the carrier along the optical axis and is fixedly arranged in the seat; the first mover is located on the left and right sides of the carrier along the optical axis and is fixedly arranged on the carrier, and is arranged corresponding to the first stator. The first stator drives the first mover to move, and the first mover includes two first upper movers located on the upper part of the carrier, and two first lower movers located on the lower part of the carrier. The driving structure of the present invention has the advantages of good anti-shake effect and small thickness.

A kind of driving structure and periscopic camera module

Technical field

The present invention relates to webcam driver engineering device technique fields, and in particular to a kind of driving structure and periscopic image mould Group.

Background technique

Mobile phone camera is the pith of mobile phone, consumer when using mobile phone to the auto-focusing of mobile phone camera, The functional requirements such as optical anti-vibration are higher and higher, for the beautiful of mobile phone and are convenient for carrying, it is also desirable to which the size of mobile phone camera is got over Come smaller.The curvature that liquid lens mainly change the interface of the body of liquid and applying pressure to the chamber for accommodating the liquid becomes Change, liquid lens can realize the focusing of super close distance, not will cause Optical Resolution when carrying out optical anti-vibration compensation Decline, and it is light-weight, it is suitble to miniaturization imaging device, therefore, be more and more used for mobile phone camera in recent years.

The prior art such as Chinese patent literature CN107783243A, discloses a kind of periscopic camera module comprising light Steering mechanism, lens mechanism and sensitive chip, light steering mechanism are installed on the incident side of lens mechanism, sensitive chip installation In the light emission side of lens mechanism, light steering mechanism includes prism, prism table, support shaft and pedestal, wherein prism table is set to In pedestal, prism table has the bearing surface opposite with prism, and prism table is additionally provided with axle bed, axle bed setting on the bearing surface with prism On opposite another side, axle bed is equipped with the axis hole of perforation, and support shaft is rotatablely arranged in axis hole, support shaft and camera lens machine The optical axis of optical lens is vertical in structure；Bearing surface has two side walls, and bearing surface and side wall intersection are equipped with away from bearing The supporting station that the direction in face is raised, extends along the intersection of bearing surface and side wall.The periscopic camera module of above patent document It is the effect that stabilization is realized by rotary prism, the rotation of prism is to rotate in a plane, is unable to various dimensions Rotation, so that the anti-shake effect of the periscopic camera module is poor；Moreover, the thickness of the periscopic camera module compared with Greatly, it is arranged when on mobile phone, equally influences whether the beauty of mobile phone.

Summary of the invention

Therefore, the present invention a kind of anti-shake effect is provided good, the lesser driving structure of thickness, and it is provided with the driving structure Periscopic camera module with auto-focusing, optical anti-vibration and optical zoom function.

To solve the above problems, a kind of driving structure of the invention, including pedestal, carrier, the first stator and the first mover, Pedestal is arranged for installing along optical axis, and mutual corresponding first camera lens and liquid lens；Carrier can be towards or away from described In the pedestal, the carrier can abut the mobile setting of one camera lens with the movable plate of the liquid lens when moving, drive Move the mobile curvature to adjust the liquid lens of the movable plate；First stator is located at the carrier along the left and right of optical axis direction Two sides are fixed in the pedestal；First mover is located at the carrier along the fixed setting of the left and right sides of optical axis direction On the carrier, it is correspondingly arranged with first stator, the movement of the first mover described in first stator driving, described first Mover includes mover on at least two first of the portion that is located on the carrier, and positioned at at least two first of the carrier lower part Lower mover；When auto-focusing, first described in first stator driving on mover and the first lower mover towards or away from institute It is mobile to state the first camera lens, drives the carrier that the movable plate is driven to move relative to the liquid lens along optical axis direction；With/ Or, when optical anti-vibration, first described in first stator driving on mover and first lower relatively described first camera lens of mover Deflection movement drives the carrier that the movable plate is driven to deviate the optical axis direction movement relative to the liquid lens.

The outside of first stator is arranged in first mover, is additionally provided on the inside of first stator and institute At least two second movers that the first stator is correspondingly arranged are stated, second mover is fixedly mounted on the carrier along optical axis direction The left and right sides；When auto-focusing, the second mover described in first stator driving is mobile towards or away from first camera lens, Drive the carrier that the movable plate is driven to move relative to the liquid lens along optical axis direction.

First stator is two the first magnet for being parallel to the short transverse and optical axis direction setting, described The side of the direction of first magnet and/or the separate carrier has different magnetism at the both ends along optical axis direction；Described Mover is two first coils in the portion that is located on the carrier on one, and the described first lower mover is positioned at the carrier lower part The relatively described carrier is symmetrically set respectively for two the first lower coils, two first coils and two first lower coils It sets, a wherein half-coil for first coil and first lower coil is located at one of magnetic pole of first magnet In range, wherein another half-coil of first coil and first lower coil is located at the wherein another of first magnet Within the scope of one magnetic pole；Second mover is two the second coils being correspondingly arranged with first magnet, two described The relatively described carrier of two coil is symmetrical arranged, and a wherein half-coil for second coil is located at wherein the one of first magnet Within the scope of a magnetic pole, wherein another half-coil of second coil is located at the another one magnetic pole range of first magnet It is interior.

Driving structure further includes the first coil for first coil (321) and the first lower coil (322) to be arranged Circuit board, the first coil circuit board installation is on the carrier.

The first coil circuit board includes the first coil circuit board that first coil is arranged, and described in setting First lower coil circuit board of the first lower coil, the first coil circuit board are fixedly connected with the upper side wall of the carrier, The first lower coil circuit board is fixedly connected with the lower wall of the carrier.

Gasket is provided in the two lateral walls of the pedestal, the both ends along optical axis direction of first magnet are pacified On the gasket.

Driving structure further include further include the bracket being fixedly connected with the movable plate, described in the bracket has and stretches out The distal end of liquid lens, the distal end are fixedly connected with the carrier；The movable plate has when mobile relative to the liquid lens Have the tendency that restoring to initial position, trend effect, which provides on the carrier for the carrier, restores answering to initial position Position power.

Driving structure further includes mounting rack, third stator and third mover, and mounting rack is removably set in the pedestal, For first camera lens to be fixedly mounted；Third stator is located at the mounting rack along the fixed setting of the left and right sides of optical axis direction In the pedestal；Third mover is located at the mounting rack and is fixed at the mounting rack along the left and right sides of optical axis direction On, it is correspondingly arranged with the third stator, the movement of the first mover described in first stator driving；Auto-focusing and/or optics When zoom, third mover described in the third stator driving is mobile towards or away from the liquid lens, drives the mounting rack Interior first camera lens is mobile towards or away from the liquid lens.

The third stator is two third magnet for being parallel to the short transverse and optical axis direction setting, described The side of the direction of third magnet and/or the separate mounting rack has different magnetism at the both ends along optical axis direction；It is described Third mover is two tertiary coils of the corresponding third magnet setting, the relatively described mounting rack pair of two tertiary coils Claiming setting, a wherein half-coil for the tertiary coil is located within the scope of one of magnetic pole of the third magnet, and described the Wherein another half-coil of three-winding is located within the scope of the another one magnetic pole of the third magnet.

Driving structure further includes the return unit being arranged between institute's mounting rack and the pedestal, and the return unit is the peace The reset force for providing and restoring to initial position is provided.

The return unit is fixedly connected with the upper surface of the mounting rack and/or lower end surface, is suspended on the mounting rack In the pedestal.

A kind of periscopic camera module of the invention, including above-mentioned driving structure；First camera lens and liquid lens edge Optical axis direction is fixed in the pedestal；The upper side wall of pedestal is arranged in dust-proof mirror, and light is entered by the dust-proof mirror Into the pedestal；Reflecting mirror is corresponding with the dust-proof mirror to be arranged in the pedestal, and first camera lens and described is located at The side of the optical axis direction of liquid lens, for will be entered by the dust-proof mirror the intracorporal light of the seat be reflected into it is described Optical axis direction is parallel；Imaging sensor is arranged in the pedestal, positioned at the optical axis of first camera lens and the liquid lens The light being transmitted in described image sensor is imaged in the other side in direction.

Light sequentially passes through the liquid lens and first camera lens, in described image after reflecting mirror reflection It is imaged on sensor.

The liquid lens are fixed on first camera lens.

Technical solution of the present invention has the advantages that

1. driving structure of the invention, first stator can drive first mover towards or away from described first Camera lens is mobile, and mobile relative to first deflection lens, is able to drive the carrier and drives the relatively described liquid of movable plate State camera lens moves and/or is deviateed along optical axis direction the optical axis direction and moves, and the change shape of the liquid lens curvature is more, So that the auto-focusing and optical anti-vibration functional effect realized are more preferable.Because first stator and first mover are flat Row is fixed in the two lateral walls of the pedestal in the pedestal short transverse and the optical axis direction, in the seat It is not provided with first stator and first mover at the close upper side wall and lower wall of body, the driving knot can be reduced The height of structure is more agreed with mobile phone and is wanted to thickness so that being equipped with the thinner of the periscopic camera module of the driving structure It asks.

2. driving structure of the invention, the bracket is fixedly connected with the carrier, the relatively described liquid of the movable plate Trend with recovery to initial position when camera lens is mobile, trend effect provide recovery extremely for the carrier on the carrier The reset force of initial position, the reset force can save the time of the carrier recovery to initial position, so that driving structure Regulatory function is more sensitive, and is reduced to the power consumption provided when the carrier resets, more energy saving；Simultaneously, it is possible to reduce The amount of parts of driving structure, so that the internal structure of driving structure is more simple, ease of assembly, and save the cost.

3. driving structure of the invention, the Curvature varying of the liquid lens can generate the variation of focal length, described in cooperation When first camera lens is mobile towards or away from the liquid lens, optical zoom function may be implemented, so that being equipped with the driving knot The function that the periscopic camera module of structure has is more.

4. driving structure of the invention, the setting of the return unit provide recovery to initial position for the mounting rack Biasing force is saved the mounting rack and is restored to the time of initial position, so that the driving function of driving structure is sensitiveer；And not Third stator driving third mover is needed to restore mounting rack to initial position, more saving power consumption.

5. periscopic camera module of the invention, liquid lens are fixed on the first camera lens, liquid lens and The distance between one camera lens is fixed value, and avoids influence of other components to distance between the first camera lens and liquid lens, So that the effect of the auto-focusing of periscopic camera module, optical anti-vibration and optical zoom function is more preferable.

Detailed description of the invention

It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor It puts, is also possible to obtain other drawings based on these drawings.

Fig. 1 is the decomposition diagram of periscopic camera module of the invention；

Fig. 2 is the schematic diagram that periscopic camera module of the invention removes decomposed after upper housing；

Fig. 3 is periscopic camera module of the invention using plane where crossing short transverse and axis direction as cutting plane Sectional view；

Fig. 4 is periscopic camera module of the invention using plane where crossing width direction and axis direction as cutting plane Sectional view；

Description of symbols:

1- pedestal；11- upper housing；12- lower case；13- procapsid；14- back casing；2- carrier；31- first Magnet；The first coil of 321-；The first lower coil of 322-；The second coil of 33-；34- third magnet；35- tertiary coil； 41- the first coil circuit board；42- the first lower coil circuit board；6- gasket；61- gasket frame；62- gasket groove；7- Mounting rack；8- return unit；The first camera lens of 91-；92- liquid lens；921- bracket；The dust-proof mirror of 101-；102- reflecting mirror； 103- imaging sensor；104- sensor stand.

Specific embodiment

Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.

Embodiment one:

The driving structure of the present embodiment, refering to fig. 1-Fig. 4, including pedestal 1, carrier 2, driving assembly, mounting rack 7, reset Part 8 and gasket 6.

Pedestal 1 is arranged for installing along optical axis, and mutual corresponding first camera lens 91 and liquid lens 92.Pedestal 1 includes Upper housing 11, lower case 12, procapsid 13 and back casing 14, carrier 2, driving assembly, mounting rack 7, return unit 8 and gasket 6 are set It sets and is surrounded in installation cavity in upper housing 11, lower case 12, procapsid 13 and back casing 14.

Carrier 2 can be towards or away from the mobile setting of first camera lens 91 in the pedestal 1, and the carrier 2 is moving It can be abutted with the movable plate of the liquid lens 92 when dynamic, drive the mobile song to adjust the liquid lens 92 of the movable plate Rate.In the present embodiment, bracket 921 is fixedly connected with the movable plate, and the bracket 921, which has, extends radially the liquid The distal end of camera lens 92, the distal end are fixedly connected with the carrier 2.The carrier 2 is mobile to drive the bracket 921 to drive institute It is mobile relative to the liquid lens 92 to state movable plate, so that the curvature of the liquid lens 92 changes；And the movable plate Trend with recovery to initial position when mobile relative to the liquid lens 92, the trend act on the carrier 2 as institute It states carrier 2 and the reset force restored to initial position is provided, the carrier 2 can be saved and restored to the time of initial position, so that The regulatory function of driving structure is more sensitive.

Mounting rack 7 is removably set in the pedestal 1, positioned at the side of the optical axis direction of the carrier 2, for fixing First camera lens 91 is installed.In this example, the mounting rack 7 and the carrier 2 are located at the liquid lens 92 along light The two sides of axis direction.

Driving assembly is used to drive the movement of the carrier 2 and the mounting rack 7, so that the liquid connecting with the carrier 2 State camera lens 92, and be arranged between first camera lens 91 on the mounting rack 7 and relative displacement occurs, it is automatic right to realize Coke, optical anti-vibration and optical zoom function.Driving assembly includes the first stator, the first mover, the second mover, third stator and the Three movers.

First stator is located at the carrier 2 being fixed in the pedestal 1 along the left and right sides of optical axis direction.

First mover is located at the carrier 2 being fixed on the carrier 2 along the left and right sides of optical axis direction, with First stator is correspondingly arranged, and the movement of the first mover described in first stator driving, first mover includes being located at institute State mover on at least two first of 2 top of carrier, and at least two first lower movers positioned at 2 lower part of carrier, two Mover and two first lower movers are symmetrically arranged at the two sides of the width direction of the carrier 2 on first.Described first is fixed Son drives the first mover movement.

There are two second mover tools, and the carrier 2 that is fixedly mounted on corresponding with first stator is along optical axis side To the left and right sides, positioned at the inside of first stator.The movement of second mover described in first stator driving.

Third stator is parallel to the pedestal 1 that is fixed at of 1 short transverse of pedestal and the optical axis direction In two lateral walls, in Fig. 2, to be arranged in parallel with first stator in the two side walls of inboard and outside.

There are two third mover tools, corresponding with the third stator to be arranged on the mounting rack 7, is located at the third The inside of stator, the movement of third mover described in the third stator driving.

Return unit 8 is arranged between the mounting rack 7 and the pedestal 1, and in the present embodiment, return unit 8 is provided with two It is a, it is fixedly connected respectively with upper surface of the mounting rack 7 on optical axis direction and lower end surface, the mounting rack 7 passes through described Return unit 8 is suspended in the pedestal 1, provides the reset force restored to initial position for the mounting rack 7.

In the present embodiment, when auto-focusing, first described in first stator driving on mover and the first lower mover It is mobile towards or away from first camera lens 91, drive the carrier 2 to drive relatively described 92 edge of liquid lens of the movable plate Optical axis direction is mobile；Second mover described in first stator driving is mobile towards or away from first camera lens 91, drives institute Stating carrier 2 drives the movable plate to move relative to the liquid lens 92 along optical axis direction；Described in the third stator driving Three movers are mobile towards or away from the liquid lens 92, drive first camera lens 91 in the mounting rack 7 towards or it is remote It is mobile from the liquid lens 92.When optical anti-vibration, first described in first stator driving on mover and described first lower dynamic Son is deflected relative to first camera lens 91 and is moved, and the carrier 2 is driven to drive the relatively described liquid lens 92 of the movable plate partially It is mobile from the optical axis direction.In auto-focusing, the first above-mentioned mover, the second mover and third mover can carry out simultaneously The movement of auto-focusing, can also the progress auto-focusing of one of those or two movement, certainly, in auto-focusing, energy Movement that is enough while carrying out optical anti-vibration, or individually carry out the movement of optical anti-vibration.And in the Curvature varying of liquid lens 92 While so that the focal length of liquid lens 92 changes, the auto-focusing of the first camera lens 91 of cooperation is mobile, and optics may be implemented The function of zoom.

In this embodiment, the setting quantity of the first mover, the second mover and third mover and the shape of coil can bases Use demand determines that such as the second mover is provided with 6 altogether, and 8 etc., the first mover and third mover are provided with 4,6 etc..

First stator can drive first mover mobile towards or away from first camera lens 91, and opposite institute The deflection movement of the first camera lens 91 is stated, the carrier 2 is able to drive and drives the movable plate liquid lens 92 relatively along optical axis Direction is mobile and/or deviates the optical axis direction movement, and the change shape of 92 curvature of liquid lens is more, so that realizing Auto-focusing and optical anti-vibration functional effect it is more preferable.Because first stator and first mover are described to be parallel to 1 short transverse of pedestal and the optical axis direction are fixed in the two lateral walls of the pedestal 1, in the pedestal 1 It is not provided with first stator and first mover at upper side wall and lower wall, the driving structure can be reduced Highly, so that being equipped with the thinner of the periscopic camera module of the driving structure, more agree with requirement of the mobile phone to thickness.

In the present embodiment, first stator is to be parallel to two of the short transverse and optical axis direction setting the The both ends along optical axis direction of one magnet 31, first magnet 31 have different magnetism.

First mover is the first coil being correspondingly arranged with the first magnet 31, and mover is on carrier 2 on described first Two first coils 321 in portion, the described first lower mover are two the first lower coils 322 positioned at 2 lower part of carrier, two The relatively described carrier 2 is symmetrical arranged respectively for a first coil 321 and two first lower coils 322, and described first A wherein half-coil for coil 321 and first lower coil 322 is located at one of magnetic pole model of first magnet 31 In enclosing, wherein another half-coil of first coil 321 and first lower coil 322 is located at first magnet 31 Another one magnetic pole within the scope of.

Second mover is two the second coils 33 being correspondingly arranged with first magnet 31, two second lines It encloses the 33 relatively described carriers 2 to be symmetrical arranged, a wherein half-coil for second coil 33 is located at its of first magnet 31 In within the scope of a magnetic pole, wherein another half-coil of second coil 33 is located at the another one of first magnet 31 Within the scope of magnetic pole.

The third stator is to be fixed at the pedestal along the left and right sides of optical axis direction positioned at the mounting rack 7 In 1, there are two the third magnet 34, the both ends along optical axis direction of the third magnet 34 to have different magnetism for tool.This In embodiment, first magnet 31 and third magnet 34 can be set for magnetic two different magnet along optical axis direction distribution It sets, or integrally formed magnet.

The third mover is located at the mounting rack 7 and is fixed at the mounting rack along the left and right sides of optical axis direction Two tertiary coils 35 on 7, the corresponding third magnet 34 are arranged, the relatively described mounting rack 7 of two tertiary coils 35 It being symmetrical arranged, a wherein half-coil for the tertiary coil 35 is located within the scope of one of magnetic pole of the third magnet 34, Wherein another half-coil of the tertiary coil 35 is located within the scope of the another one magnetic pole of the third magnet 34.

First coil and the second coil 33 are located at the inner side and outer side of the first magnet 31, in order to facilitate first coil It is arranged and reduces the component of driving structure, by first coil setting in first coil circuit board, the first coil circuit board peace On the carrier 2, the center line of first coil circuit board is parallel with the optical axis direction, in the present embodiment, is and optical axis It is overlapped.The first coil circuit board includes the first coil circuit board 41 that first coil 321 is arranged, and setting institute State the first lower coil circuit board 42 of the first lower coil 322, the upper side wall of the first coil circuit board 41 and the carrier 2 It is fixedly connected, the first lower coil circuit board 42 is fixedly connected with the lower wall of the carrier 2.First coil in the present embodiment The magnetic field inside and outside the first magnet 31 is taken full advantage of with the second coil 33, reduces the height of driving structure, simplifies driving knot The structure and amount of parts of structure, so that driving structure is more compact.

In progress auto-focusing, optical anti-vibration and optical zoom, according to use demand, to first coil, the second coil 33 and tertiary coil 35 in be passed through adaptable electric current.

It is provided with gasket 6 in the two lateral walls of the pedestal 1, in Fig. 2, for positioned at inboard two with outside Gasket 6 is provided in side wall, first coil is stretched out along optical axis direction in the both ends along optical axis direction of first magnet 31 respectively Both ends, the both ends along optical axis direction of first magnet 31 are mounted on the gasket 6, and the insertion of third magnet 34 is set It sets on the gasket 6.As shown in Figure 1, having on the inner wall of the first magnet 31 of direction on the gasket 6 convex to the first magnet 31 Gasket frame 61 out, the both ends along optical axis direction of first magnet 31 are fixed on the gasket frame 61.The pad The position of the corresponding third magnet 34 of piece 6 has gasket groove 62, and the insertion of third magnet 34 setting is recessed in the gasket In slot 62.

In order to facilitate the installation of return unit 8, return unit 8 is also disposed on the gasket 6, and third magnet 34 is located at two Between the return unit 8.

Embodiment two:

The periscopic camera module of the present embodiment, as shown in Figures 1 to 4, including in embodiment one driving structure, One camera lens 91, liquid lens 92, dust-proof mirror 101 and reflecting mirror 102.

First camera lens 91 and liquid lens 92 along optical axis direction setting in the pedestal 1, be described in the present embodiment Liquid lens 92 are fixed on first camera lens 91, i.e., described first camera lens 91 is suspended on institute by the return unit 8 It states in pedestal 1, the carrier 2, the first mover and the second mover are suspended in the pedestal 1 by bracket 921.

The upper side wall of pedestal 1 is arranged in dust-proof mirror 101, and light is entered in the pedestal 1 by the dust-proof mirror 101.

Reflecting mirror 102 is corresponding with the dust-proof mirror 101 to be arranged in the pedestal 1, and 91 He of the first camera lens is located at The side of the optical axis direction of the liquid lens 92, the light for will be entered in the pedestal 1 by the dust-proof mirror 101 are anti- It is parallel with the optical axis direction for penetrating.

Imaging sensor 103 is arranged in the pedestal 1, positioned at the light of first camera lens 91 and the liquid lens 92 The light being transmitted in described image sensor 103 is imaged in the other side of axis direction.In the present embodiment, light passes through After the reflecting mirror 102 reflects, the liquid lens 92 and first camera lens 91 are sequentially passed through, in described image sensor It is imaged on 103.

Of course for fixed imaging sensor 103, sensor stand 104, the sensor stand are provided in pedestal 1 104 are fixedly connected with upper housing 11 and back casing 14, and sensor circuit board is fixedly installed on back casing 14, and described image passes Sensor 103 is connect with sensor circuit partitioned signal.

Certainly, the first camera lens 91 and liquid lens 92 can be to be separately mounted in the pedestal 1 along optical axis direction.

Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or It changes still within the protection scope of the invention.