CN2765222Y

CN2765222Y - Manual focusing mechanism of digital camera

Info

Publication number: CN2765222Y
Application number: CN200420084788.0U
Authority: CN
Inventors: 胡立清
Original assignee: Premier Image Technology Corp
Current assignee: Premier Image Technology Corp
Priority date: 2004-08-24
Filing date: 2004-08-24
Publication date: 2006-03-15
Anticipated expiration: 2014-08-24

Abstract

A manual focusing mechanism of a digital camera comprises a lens mount, a lens unit and a focusing mechanism; the lens seat and the lens unit form a telescopic sleeve by utilizing the sleeving of the sliding seat and the guide post, so that the lens in the telescopic sleeve can move back and forth along the axial direction to change the focal length; the focusing mechanism is a focus-changing deflector rod containing a cam, the deflector rod comprises a cam, the cam is provided with a shaft hole and a cam surface, the cam surface is provided with a plurality of surfaces with different heights to be contacted with the lens unit, the focus-changing deflector rod is pivoted on the lens base, and a screw rod is used for setting the initial focal length; when the lens unit is shifted, the focus-changing shift lever pushes the lens unit to extend and retract by the cam surface, so that the multi-stage, precise and reliable far and near focus switching effect is generated. According to the above scheme, the present invention abandons the traditional structure design of screwing the lens and the rotary ring, which not only makes the processing of the components simple, the assembly of the production line fast, but also makes the adjustment of the initial focal length easier.

Description

The manual focusing mechanism of digital camera

Technical field

The utility model is about the manual focusing mechanism of a digital camera, and You Zhike utilizes slide guiding camera lens to endwisely slip along it, and utilizes a cam surface to promote and energy segmentation switching burnt structure far away, near.

Background technology

Because camera lens is after assembling, each and every one focal length is difference nearly all to some extent.So the initial focal length of camera lens must give indivedual adjustment, image can clearly be incident upon on the magazine image sensor after passing lens.For this reason, adopt a kind of change between general camera lens and the lens mount, the threaded adjusting in the mat change is apart from seeking focal length.Finishing after the setting of initial focal length the means of mat point glue is fixed again.

Said structure, the accuracy requirement height of its production mould, not only the element cost expensive and make up time-consuming, demand urgently the improvement.

Summary of the invention

In view of this, the purpose of this utility model is for improving volume production speed, the initial focal length of convenient adjustment is accurate and stable with the height that guarantees far and near focal length, and provide a kind of manual focusing mechanism of digital camera, it is by replacing the threaded engagement design of traditional camera lens and change, cooperate focusing screw to set reference position with directly flexible camera lens, and promote camera lens, to switch far away, near focal length like clockwork by the cam surface that changes burnt driving lever.

The utility model is the technological means that achieves the above object: a kind of manual focusing mechanism of digital camera, the mechanism of its enforcement can comprise a lens mount, a lens unit and a focus adjusting mechanism; Utilize the fit of slide and guidepost between lens mount and the lens unit, form a flexible external member, make the lens of the inside can be vertically to and fro telescopic moving change focal length; Focus adjusting mechanism is one to have the burnt driving lever of changing of camming action, this driving lever includes a cam, and this cam is provided with an axis hole and a cam surface, the face that this cam surface is provided with a plurality of differing heights contacts with this lens unit, change burnt driving lever and be articulated on the lens mount, and utilize a screw rod to set initial focal length; When stirring, change burnt driving lever and make it flexible, can produce multistage, the accurate and reliable eager effect of changing far away, near by this by cam surface promotion lens unit.

The invention also discloses the manual focusing mechanism of another kind of digital camera, comprising: a flexible external member, provide the strength of its elongation by a spring, install a lens combination at an end of this flexible external member, at other end one charge coupled cell is housed; One cam, this cam comprises the face of a plurality of differing heights, the distance between this lens combination and this charge coupled cell is the fine setting thereupon in order to the compresses in length of this flexible external member being made different distance during by cam rotation.

According to such scheme, the utility model has been given up the structural design that traditional known camera lens and change screw togather, make not only that element processing is simple, the production line assembling fast, the adjustment of its initial focal length also becomes and is more prone to.

Description of drawings

Fig. 1 is the three-dimensional exploded view of the utility model embodiment.

Fig. 2 is the synoptic diagram that changes burnt driving lever cam surface of the utility model embodiment.

Fig. 3 is that the element of the utility model embodiment assembled state concerns synoptic diagram.

The component symbol explanation

10 lens units, 11 slides

12 spacing column base 13 lug bosses (circular salient point)

14 lens combination

20 lens mounts, 21 supports

22 screw rods, 23 guideposts

24 limited posts, 25 screws

30 focus adjusting mechanisms 31 change burnt driving lever

32 cam surfaces, 33 axis holes

40 filter plates, 50 dust-proof cushions

60CCD (charge coupled cell) S1 spring

S2 spring S3 shell fragment

Embodiment

At first, see also Fig. 1 to shown in Figure 3, the manual focusing mechanism according to preferred embodiment of the present utility model is made up of lens unit 10, lens mount 20 and focus adjusting mechanism 30.Utilize the fit of slide 11 and guidepost 23 between lens mount 20 and the lens unit 10, and constitute a flexible external member, make lens unit 10 lens combination 14 can along lens direction back and forth telescopic moving change focal length.Aforementioned focus adjusting mechanism 30 is provided with and changes burnt driving lever 31, and this changes burnt driving lever 31 and is articulated on the lens mount 20, and utilizes a screw rod 22 to set its initial focal length.Change burnt driving lever 31 and be provided with the flexible distance that cam surface can be used the controls lens unit, produce multistage, far, closely change burnt effect accurately, reliably.

As shown in Figure 1, wherein lens mount 20 is provided with a screw 25 and can vertically locks for screw rod 22, and becomes the pivot joint axle center when changing burnt driving lever 31 and being articulated in lens mount 20.Focus adjusting mechanism 30 is one to have the burnt driving lever 31 of changing of camming action.Change burnt driving lever 31 and be provided with axis hole 33 and run through for focusing screw 22, mat spring S1 produces a strength of repelling each other with lens mount 20, idle motion when setting initial focal length to eliminate or mobile back clearance (back lash).

The preferably can establish support 21 on lens mount 20, guarantee the standing upright of focusing screw 22, the whole focus adjusting mechanism 30 of protection of holding concurrently.

Establish guidepost 23 and limited post 24 on the lens mount 20, lens unit 10 establishes slide 11 and spacing column base 12 is inserted in slip for it, use guiding lens unit 10 stably to be in axial sliding, and use the telescopic movable between smooth and easy this lens mount and this lens unit with respect to lens mount 20.During combination, guidepost 23 can be inserted in spring S2, and using provides the elongation strength of repelling each other between lens unit 10 and the lens mount 20; Certainly, spring S2 also can be sheathed on outside this slide, so that the permanent strength of upholding vertically that keeps between this lens mount and this lens unit.Illustrate as Fig. 3, when screw rod 22 is locked screw 25, will move and change burnt driving lever 31 and lens unit 10.Move by this, can set an initial focal length.When arriving initial focal length, just can be in the screw thread position gluing of focusing screw 22, for example point is gone up the commercially available anti-glue 34 (product of Nylok company that falls, interesting person can consult the description of product of the website www.nylok.com of the said firm voluntarily), so that the elimination tolerance clearance, the high precision that keeps the focusing result is with stable.

See also Fig. 2, change burnt driving lever 31 and can establish a cam surface 32 according to what the utility model was implemented.Cam surface 32 contains the face of differing heights for driving lens unit 10.Stir and change burnt driving lever 31 and lens unit 10 will be moved and conversion focal length accurately according to cam surface 32.For lowering frictional resistance with accurately mobile, lens unit 10 can be established a lug boss 13 (for example being spherical salient point) and the sliding contact of cam surface 32 dos than facet.

Again with reference to figure 3, the manual focusing mechanism of the digital camera of implementing according to the utility model establishes CCD 60 (charge coupled cell) within lens mount 20, utilize a shell fragment S3 to press on a reference field.The preferably between the lens combination of CCD 60 and lens unit 10, can add general known filter plate 40.In addition, can add still that between filter plate 40 and CCD 60 dust-proof cushion 50 is invaded by micronic dust and polluted with the sensitive surface that prevents CCD 60.

Focus adjusting mechanism of the present utility model includes cam, in order to this flexible external member is made the compresses in length of different distance, the distance between this lens combination and this CCD is finely tuned thereupon during by this cam rotation.Wherein, cam comprises the face of a plurality of differing heights, and this cam utilize a screw rod adjust itself and should flexible external member between initial distance, thereby obtain the initial focal length of this digital camera.

The above, only in order to convenient explanation preferred embodiment of the present utility model, all equalizations of being done according to this case claims change and modify, and all should belong to the scope that its patent contains.

Claims

1, a kind of manual focusing mechanism of digital camera is characterized in that, comprising:

One lens mount, inside are provided with a charge coupled cell, and a vertically affixed guidepost, and are provided with a screw for vertically locking a screw rod;

One lens unit is provided with lens and a slide, and this lens unit is by this slide and this guidepost fit and along an axially telescopic moving back and forth;

One focus adjusting mechanism, comprise a driving lever, this driving lever includes a cam, and this cam is provided with an axis hole and a cam surface, the face that this cam surface is provided with a plurality of differing heights contacts with this lens unit, and be articulated on this lens mount by aforementioned screw rod, and it is flexible to promote this lens unit by this cam surface when being stirred.

2, the manual focusing mechanism of digital camera as claimed in claim 1 is characterized in that, the degree of depth of locking this screw by screw rod is adjusted the initial focal length of this digital camera.

3, the manual focusing mechanism of digital camera as claimed in claim 1 is characterized in that, is provided with one between this lens mount and this lens unit and makes and keep a spring of upholding strength vertically between the two.

4, the manual focusing mechanism of digital camera as claimed in claim 1 is characterized in that, this slide multiple sheathed one makes the permanent spring of upholding strength vertically that keeps between this lens mount and this lens unit outward.

5, the manual focusing mechanism of digital camera as claimed in claim 1 is characterized in that, this guidepost multiple sheathed one makes the permanent spring of upholding strength vertically that keeps between this lens mount and this lens unit outward.

6, the manual focusing mechanism of digital camera as claimed in claim 1 is characterized in that, this lens mount is vertically fixed a limited post, and this lens unit is also established a spacing column base accordingly.

7, the manual focusing mechanism of digital camera as claimed in claim 1 is characterized in that, this lens unit is established a lug boss and contacted with this cam surface.

8, the manual focusing mechanism of digital camera as claimed in claim 1 is characterized in that, this lens unit is established a circular salient point and contacted with this cam surface.

9, the manual focusing mechanism of digital camera as claimed in claim 1 is characterized in that, is provided with one between this driving lever and this lens mount and makes between the two the permanent spring that repels each other strength that keeps.

10, a kind of manual focusing mechanism of digital camera is characterized in that, comprising:

One flexible external member provides the strength of its elongation by a spring, installs a lens combination at an end of this flexible external member, at other end one charge coupled cell is housed;

One cam, this cam comprises the face of a plurality of differing heights, the distance between this lens combination and this charge coupled cell is the fine setting thereupon in order to the compresses in length of this flexible external member being made different distance during by cam rotation.

11, the manual focusing mechanism of digital camera as claimed in claim 10 is characterized in that, this cam is adjusted it and is somebody's turn to do the initial distance of stretching between the external member by a screw rod.

12, the manual focusing mechanism of digital camera as claimed in claim 10 is characterized in that, this screw rod is fixed by the anti-glue that falls in adjusting the back.