CN100514108C

CN100514108C - Focusing lens module

Info

Publication number: CN100514108C
Application number: CNB2006101256449A
Authority: CN
Inventors: 张谷源; 陈柏瑜
Original assignee: Asia Optical Co Inc
Current assignee: Asia Optical Co Inc
Priority date: 2006-08-25
Filing date: 2006-08-25
Publication date: 2009-07-15
Anticipated expiration: 2026-08-25
Also published as: CN101131459A

Abstract

The invention discloses a focusing lens die set including the seat body, the driving unit, the decelerating unit, the external canister and the lens room unit. The driving unit has a driving element; the decelerating unit can be driven by the driving unit. The external canister is set in the seat body and has a ring body enclosing with the axis and a holding room enclosed by the ring body; also it has the inner spiral tooth part formed in the inner cycle side of the ring body. The lens room unit is connected with the inner spiral tooth part, which includes a lens canister enclosed a room and the lens set in the lens room along the axis. The lens canister has an external spiral tooth part connected with the inner spiral tooth part and a driven part driven by the decelerating unit.

Description

The camera lens module that can focus

[technical field]

The present invention relates to a kind of camera lens module, refer in particular to a kind of camera lens module of focusing.

[background technology]

Consult shown in Fig. 1,2, be the existing disclosed a kind of zoom lens module of TOHKEMY 2005-215539 patent, it can be installed in one has on the mobile phone of camera function.Fig. 1 is the three-dimensional combination figure of existing zoom lens module, and Fig. 2 is the existing zoom lens module shown in Fig. 1, the schematic perspective view when removing CD-ROM drive motor and shell.The camera lens module includes base 11, shell 12, CD-ROM drive motor 13, is engaged with each other and can be driven reducing gear train 14 that motor 13 drives, be arranged on and can be decelerated on the base 11 that gear train 14 drives and the druum cam 15 that rotates synchronously, first lens unit 16, second lens unit 17 that be arranged in parallel with first lens unit 16 by several reduction gearing, and colludes the extension spring of being located between first and second lens unit 16,17 (not shown).

Druum cam 15 includes right cylinder 151 and is formed at the spiral fashion body 152 on right cylinder 151 surfaces, and this spiral fashion body 152 has last spiral sliding surface 153 and reaches spiral sliding surface 154 down.

First lens unit 16 have a linearity be slidingly installed in first framework 161 on the base 11, one be installed in first eyeglass 162 on first framework 161, one can with the first cam catch junctor 163 of last spiral sliding surface 153 butts.Second lens unit 17 have a linearity be slidingly installed in second framework 171 on the base 11, one be installed in second eyeglass 172 on second framework 171, one can with the second cam catch junctor 173 of following spiral sliding surface 154 butts.

Because the upper and lower spiral sliding surface the 153, the 154th of spiral fashion body 152 respectively with first and second cam catch junctor 163,173 butts, makes that the spiral fashion body 152 of druum cam 15 is to be folded between first and second cam catch junctor 163,173.When druum cam 15 when the axis of himself rotates, first and second cam catch junctor 163,173 can slide along with the cambered surface of upper and lower spiral sliding surface 153,154 on upper and lower spiral sliding surface 153,154 respectively, make first and second framework 161,171 relatively near with away from, and then make this first and second eyeglass 162,172 also simultaneously relatively near with away from.

Focus when action, CD-ROM drive motor 13 can be suitable, rotate counterclockwise, and these reduction gearing that drive simultaneously in the reducing gear train 14 are rotated synchronously, and druum cam 15 also is decelerated gear train 14 driven rotary simultaneously.Druum cam 15 in the rotation, will order about first and second eyeglass 162,172 simultaneously relatively near with away from and reach the purpose of focusing.

Though above-mentioned camera lens module can be finished the focusing purpose, and following shortcoming is arranged:

The first, reducing gear train 14 drive first and second framework 161,171 close to each other with away from the time, need to see through druum cam 15 and transmit kinetic energy, and can't directly drive first and second framework 161,171 by reducing gear train 14.Therefore, the member of camera lens module is various and can't effectively dwindle the volume of mobile phone, is difficult for reaching the light and handy requirement of mobile phone.

The second, the fabricator of camera lens module need be at druum cam 15 design in addition, die sinking and manufacturing when producing camera lens.When assembling this camera lens, the operator of production line also needs many one number of assembling steps: druum cam 15 is assembled in this camera lens module.Therefore, the part of this camera lens module and manufacturing cost all can't reduce.

[summary of the invention]

The object of the present invention is to provide a kind of camera lens module of focusing, it can be so that assembly simplification and reduced volume, and then reduces material cost and manufacturing cost.

According to above-mentioned purpose of the present invention, the invention provides a kind of camera lens module of focusing, but it mainly includes pedestal, be assembled in driver element in the pedestal, be assembled in the pedestal and the deceleration unit of drived unit transmission, be installed on the urceolus in the pedestal, and with the unit, mirror cell of urceolus bolt, wherein driver element has an actuator at least; Urceolus have one around the ring body of an axis, one by the internal screw thread portion of ring body on the accommodation space that defines and the inner peripheral surface that is formed at ring body; The unit, mirror cell is to be spirally connected with the internal screw thread portion of urceolus rotationally, and this unit, mirror cell includes lens barrel that an encirclement defines a room, at least one is arranged on external screw teeth portion that the internal screw thread portion of eyeglass in the room, and urceolus is spirally connected and one along axis and can be decelerated the direct drive portion that is driven in unit.The camera lens module also includes one and is positioned at the accommodation space of urceolus and corresponding to the image sensor of eyeglass.Deceleration unit is the reducing gear train that is assembled by several reduction gearing engagements.The camera lens module also is provided with a control architecture.This control architecture includes the image processor that is connected with the image sensor signal, the position that is connected in deceleration unit detects the unit, and detects the microprocessing unit that unit and driver element are connected with image processor, position.The position detect that the unit has on the deceleration unit of being arranged on and can with these reduction gearing rotating vane of rotation synchronously, and can this rotating vane of sensing and the location aware device that is connected with the microprocessing unit signal.

Above-mentioned pedestal has base and covers shell wall on the base, and driver element, deceleration unit and urceolus all are arranged on the base.The camera lens module also includes back clearance and eliminates the unit, and back clearance is eliminated the unit and had the ring segment that is fixed in shell wall and several and be connected in ring segment at interval and be resisted against compression shell fragment on the lens barrel.

Above-mentioned deceleration unit is the reducing gear train that is assembled by several reduction gearing engagements, lens barrel also has a front side wall along radial outward extension, reach a ring wall that is connected and extends with front side wall along axis towards urceolus, the periphery of front side wall is defined as being driven portion and is the commutating tooth colyliform, and external screw teeth portion is formed on the outer ring surface of ring wall.

Compared to prior art, the camera lens module that the present invention can focus is the portion that is driven that directly drives lens barrel by deceleration unit, and being internal screw thread portion with urceolus, the external screw teeth portion of lens barrel is spirally connected, make that lens barrel can advance with respect to the urceolus spiral shell, spiral shell moves back and the action of focusing, this simple drive structure can make the assembly simplification, thereby effectively dwindle the volume of camera lens module, and reduce component count.

[description of drawings]

Fig. 1 is the three-dimensional combination figure of the existing disclosed a kind of zoom lens module of TOHKEMY 2005-215539 patent.

Fig. 2 is the existing zoom lens module shown in Fig. 1, the schematic perspective view when removing CD-ROM drive motor and shell.

Fig. 3 is the solid combination partial schematic sectional view of a preferred embodiment of the camera lens module that can focus of the present invention.

Fig. 4 is the control architecture synoptic diagram in this preferred embodiment.

Fig. 5 is the schematic top view after the back clearance in this preferred embodiment is eliminated unit and shell wall and removed, and it mainly is that the gap position of rotating vane will be described when reception position.

Fig. 6 is the schematic side view of this preferred embodiment, and the relative position of lens barrel and urceolus is described when reception position.

Fig. 7 be one with the similar view of Fig. 5, the gap position of rotating vane is described when the focal position.

Fig. 8 be one with the similar view of Fig. 6, the relative position of lens barrel and urceolus is described when the focal position.

[embodiment]

Relevant for aforementioned and other technology contents, characteristics and effect of the present invention, will cooperate with reference to graphic and preferred embodiment and make detailed description below.

Shown in Fig. 3,4,6, be respectively three-dimensional combination partial schematic sectional view, control architecture synoptic diagram and schematic side view of the present invention, the preferred embodiment of the camera lens module that the present invention can focus is can be installed on the camera cell phone with automatic focus function.The camera lens module that can focus comprises pedestal 20, driver element 30, deceleration unit 40, urceolus 50, unit, mirror cell 60, image sensor 70, control architecture 80, and back clearance is eliminated unit 90.

Pedestal 20 has base 21 and covers shell wall 22 on the base 21.

Driver element 30 is arranged on the base 21, and it includes actuator 31 and driving circuit 32, and driving circuit 32 is used for driving actuator 31.In the present embodiment, actuator 31 is step motor.

Deceleration unit 40 is the reducing gear trains that assembled by several reduction gearing 41 engagements, and these reduction gearing 41 are arranged on the base 21, and can be driven part 31 by a transmission gear transmission.

Urceolus 50 is to be installed on the base 21, and have one around the ring body 51 of axis L, by body 51 around the accommodation space 52 and the internal screw thread portion 53 that define.Body 51 has an inner peripheral surface 54, and internal screw thread portion 53 is formed on the inner peripheral surface 54.

Unit, mirror cell 60 is to be spirally connected with internal screw thread portion 53 rotationally, and includes a lens barrel 61 and three eyeglasses 62.Lens barrel 61 has the front side wall 611 that radially extends outwardly, be connected with front side wall 611 and along this axis L towards urceolus 50 ring walls 612 that extend, surround the room 613 that defines, be formed on the front side wall 611 and be communicated with perforate 614, and the external screw teeth portion 615 that is spirally connected of internal screw thread portion 53 of room 613 by front side wall 611 and ring wall 612, and can be decelerated the portion that is driven 616 of unit 40 transmissions.

Ring wall 612 has outer ring surface 617, these eyeglasses 62 are to be disposed in the room 613 and corresponding to perforate 614 along axis L, external screw teeth portion 615 is formed on the outer ring surface 617, the periphery of front side wall 611 is defined as the portion of being driven 616, and being driven portion 616 is to be the commutating tooth colyliform, thereby can mesh with the reduction gearing 41 of deceleration unit 40.

Image sensor 70 is to be installed on the base 21 and to be positioned at accommodation space 52, and corresponding to these eyeglasses 62.Image sensor 70 can sense the image that penetrates these eyeglasses 62 through perforate 614, and video conversion is become the signal of video signal that can supply subsequent treatment.

Control architecture 80 includes the image processor 81 that is connected with image sensor 70 signals, the position that is connected in deceleration unit 40 detects unit 82, and detect the microprocessor 83 that unit 82, driving circuit 32 are electrically connected, and the internal memory 84 that stores data with image processor 81, position.

Consult Fig. 4,5,6, wherein Fig. 5 is that the present invention eliminates unit 90 with back clearance and shell wall 22 removes schematic top view afterwards, the position detect unit 82 have one be arranged on the deceleration unit 40 and can with these reduction gearing 41 rotating vanes 821 of rotation synchronously, but and a sensing rotation blade 821 and the location aware device 822 that is connected with microprocessor 83 signals.Rotating vane 821 has a breach 823, when rotating vane 821 rotates along with these reduction gearing 41, breach 823 also changes direction thereupon rotating, when breach 823 turned to location aware device 822, location aware device 822 can be exported a rz signal to microprocessor 83.

Back clearance is eliminated unit 90 and is had the ring segment 91 that is fixed on shell wall 22, and four uniformly-spaced are connected in ring segment 91 and the compression shell fragment 92 of contact on lens barrel 61 front side walls 611.In the present embodiment, to eliminate the back clearance (Back lash) that 90 desires in unit eliminate be because the thread gap that the internal screw thread portion 53 of the external screw teeth portion 615 of lens barrel 61 and urceolus 50 produces when being spirally connected to back clearance.

When the user Activated Phone camera function, lens barrel 61 can move to focal position (shown in Fig. 7,8) via auto-focus process from reception position (shown in Fig. 5,6), takes pictures for the user.When focusing action automatically, at first, processor 83 outputs one steering order makes driving circuit 32 outputs one control signal give actuator 31 to driving circuit 32, orders about actuator 31 and rotates, and drive several reduction gearing 41 rotations of deceleration unit 40.

Because the portion that is driven 616 of lens barrel 61 is and these reduction gearing 41 engagements that therefore, the portion that is driven 616 that is the commutating tooth colyliform can drive lens barrel 61 and rotate around axis L by the transmission of these reduction gearing 41.

In addition, the external screw teeth portion 615 of lens barrel 61 is that the internal screw thread portion 53 with urceolus 50 is spirally connected, therefore the lens barrel 61 that rotates can fall along axis L spiral shell liter, spiral shell with respect to urceolus 50, and these eyeglasses 62 that are positioned at unit, mirror cell 60 also move and rotate along with synchronous ascending, descending falls in spiral shell liter, the spiral shell of lens barrel 61.The distance of these eyeglasses 62 and image sensor 70 also moves along with the ascending, descending of these eyeglasses 62 and changes.

Actuator 31 continues to rotate, the rotating vane 821 that is arranged on these reduction gearing 41 tops is driven to rotate simultaneously, when the opening 823 of rotating vane 821 rotates to location aware device 822, location aware device 822 output rz signals are given microprocessor 83, by this rz signal, microprocessor 83 promptly can be known the relative position of unit, mirror cell 60 and urceolus 50, and this position is made as the reference position that controlling and driving part 31 rotates.

These eyeglasses 62 towards approaching, when moving away from image sensor 70, this image sensor 70 can be obtained most signal of video signal continuously.These signal of video signal can convert most evaluations of estimate to and are stored in this microprocessor 83 via image processor 81, these evaluations of estimate are to utilize modulation transfer function (Modulation Transfer Function, MTF) do calculating, general industry is commonly referred to as mtf value, the black and white contrast of the high more representative image of this mtf value is big more, i.e. focusing is clear more, on the contrary, the black and white contrast of the low more representative image of this mtf value is more little, and promptly focusing is fuzzy more.

Actuator 31 continue to drive these eyeglasses 62 relatively near or process away from image sensor 70 in, microprocessor 83 continues relatively to be calculated by image processor 81 these evaluations of estimate of gained, and take out a maximal value, and obtain the position of these eyeglasses 62 of maximum evaluation of estimate, be exactly a focal position.

Through above-mentioned explanation, the process of carrying out of focusing as can be known is to be spirally connected each other by the external screw teeth portion 615 of lens barrel 61 and the internal screw thread portion 53 of urceolus 50, lens barrel 61 relative urceolus 50 spiral shell liters, spiral shell are fallen, so make these eyeglasses 62 with respect to image sensor 70 near or away from, thereby finish focusing.

The wherein end perseverance that back clearance is eliminated the compression shell fragment 92 of unit 90 is resisted against the front side wall 611 of lens barrel 61, and these compression shell fragments 92 by compression make lens barrel 61 perseverances be subjected to the elastic restoring force pushing tow of tube 50 outward.Therefore, though inside and outside spiro tooth part 53,615 has back clearance and produces when being spirally connected, but this elastic restoring force can fixed a side with this back clearance pushing tow, makes lens barrel 61 in each round trip that falls with respect to urceolus 50 spiral shell liters, spiral shell, and the influence of this back clearance can drop to minimum.

Through above explanation, advantage of the present invention can be summarized as follows:

The first, directly drive the portions 616 that are driven by these reduction gearing 41, make the lens barrel 61 that is spirally connected with urceolus 50 can spiral shell rise or spiral shell falls, these 62 whiles of eyeglasses that are positioned at lens barrel 61 with respect to image sensor 70 carry out away from or close, thereby finish focusing.Compared to prior art (with reference to shown in Figure 2), reducing gear train 14 needs to see through druum cam 15 and drives first and second eyeglass 162,172 upper and lower moving, and the present invention has omitted druum cam 15.Therefore, can effectively reduce the component count of camera lens module, make the volume-diminished of camera lens module.

The second,, can reduce the mould design and the manufacturing expense of assembly, and when assembling camera lens module, the package program of operator can be simplified also, makes production cost reduce, and increases the competitive power of product price by reducing the component count of camera lens module.

Conclude above-mentioned, the camera lens module that the present invention can focus, its deceleration unit is the portion that is driven that directly drives lens barrel, and being internal screw thread portion with urceolus, the external screw teeth portion of lens barrel is spirally connected, therefore the urceolus spiral shell advances lens barrel relatively, spiral shell moves back and the action of focusing, can dwindle the volume of camera lens module by these simple drive mechanisms, and reduce component count and reduce cost, therefore can reach goal of the invention really.

Claims

1. the camera lens module that can focus, it mainly includes pedestal, be assembled in driver element in the pedestal, be assembled in the pedestal and deceleration unit that can the drived unit transmission, and unit, mirror cell, wherein driver element has an actuator at least, and the unit, mirror cell includes an encirclement and defines the lens barrel of a room and at least one and be arranged on eyeglass in the room along axis; It is characterized in that: the camera lens module also has a urceolus, this urceolus is to be installed in the pedestal, and have one around the ring body of an axis, one by ring body around and internal screw thread portion on the accommodation space that defines and the inner peripheral surface that is formed at ring body; The unit, mirror cell that is positioned at pedestal has external screw teeth portion that an internal screw thread portion with urceolus is spirally connected and one can be decelerated the direct drive portion that is driven in unit, and this unit, mirror cell is to be spirally connected with the internal screw thread portion of urceolus rotationally; The camera lens module also includes one and is positioned at the accommodation space of urceolus and corresponding to the image sensor of eyeglass; Deceleration unit is the reducing gear train that is assembled by several reduction gearing engagements; The camera lens module also is provided with a control architecture, this control architecture includes the image processor that is connected with the image sensor signal, the position that is connected in deceleration unit detects the unit, and detects the microprocessing unit that unit and driver element are connected with image processor, position; Wherein the position detect that the unit has on the deceleration unit of being arranged on and can with these reduction gearing rotating vane of rotation synchronously, and can this rotating vane of sensing and the location aware device that is connected with the microprocessing unit signal.

2. camera lens module of focusing as claimed in claim 1 is characterized in that: actuator is a step motor, and driver element also is provided with the driving circuit that is used for driving this actuator.

3. camera lens module of focusing as claimed in claim 2 is characterized in that: the portion of being driven of lens barrel is the commutating tooth colyliform.

4. camera lens module of focusing as claimed in claim 1 is characterized in that: the quantity of eyeglass is three, and it is arranged in the lens barrel room corresponding to a perforate on the lens barrel.

5. camera lens module of focusing as claimed in claim 1 is characterized in that: pedestal has base and covers shell wall on the base, and driver element, deceleration unit and urceolus all are arranged on the base.

6. camera lens module of focusing as claimed in claim 5 is characterized in that: the camera lens module also includes back clearance and eliminates the unit, and back clearance is eliminated the unit and had the ring segment that is fixed in shell wall and several and be connected in ring segment at interval and be resisted against compression shell fragment on the lens barrel.

7. camera lens module of focusing as claimed in claim 1, it is characterized in that: deceleration unit is the reducing gear train that is assembled by several reduction gearing engagements, lens barrel also has a front side wall along radial outward extension, reach a ring wall that is connected and extends with front side wall along axis towards urceolus, the periphery of front side wall is defined as being driven portion and is the commutating tooth colyliform, and external screw teeth portion is formed on the outer ring surface of ring wall.