CN201273952Y

CN201273952Y - Lens barrel and imaging device

Info

Publication number: CN201273952Y
Application number: CNU2008201371367U
Authority: CN
Inventors: 增泽智成
Original assignee: Fujinon Corp
Current assignee: Fujinon Corp
Priority date: 2007-12-05
Filing date: 2008-09-19
Publication date: 2009-07-15
Anticipated expiration: 2018-09-19
Also published as: TWM358306U; JP2009139573A

Abstract

The utility model provides a lens barrel and a camera device, which can truly reduce the resistance coming from a flexible printed base plate and can smoothly move an optical component along an optical axis. In a lens barrel (2) and a camera device (1), an FPC (32) is arranged on an optical shutter / zooming lens unit (12) which moves along an optical axis (L2) round the optical axis (L2) in a bending way, thus the bending radius of the FPC (32) becomes longer, and the elasticity of the FPC (32) can be weakened, and thereby, the resistance coming from the FPC (32) can be reliably decreased and the optical shutter / zooming lens unit (12) can be smoothly moved along the optical axis (L2).

Description

Lens barrel and camera head

Technical field

The utility model relates to a kind of for example applicable to the lens barrel and the camera head of the mobile phone etc. of band camera.

Background technology

As camera head in the past, known have being configured in coil on the optics (for example, zoom lens or condenser lens etc.) that moves along optical axis etc., connecting the camera head of the flexible printing substrate that is used to transmit electric signal.In this camera head, as the technology of the configuration space of downsizing flexible printing substrate, known have a warpage flexible printing substrate, the camera head (for example, with reference to patent documentation 1) that the remainder of flexing is kept out of the way between optics and shell.Yet, in this technology, exist flexible printing substrate to apply resistance, and hinder the anxiety that moves smoothly of optics towards the direction that moves that stops optics by warpage.

Have as the technology that reduces the resistance that produces by this flexible printing substrate, with respect to the optical axis of optics (for example towards the technology of vertical direction flexing flexible printing substrate, with reference to patent documentation 2), the flexible printing substrate is wound on the technology (for example, with reference to patent documentation 3) of the axis of guide of guided optical parts.

[patent documentation 1] spy opens flat 7-110422 communique

[patent documentation 2] spy opens the 2003-75708 communique

[patent documentation 3] spy opens the 2006-215521 communique

Yet, as above-mentioned technology in because the bending radius of flexible printing substrate is little, therefore, the elasticity of flexible printing substrate is strong, the effect that reduces the resistance that is produced by the flexible printing substrate hardly is abundant.

The utility model content

Thereby the utility model is referred from this situation and proposes, and it is a kind of that its purpose is to provide, and can positively reduce the resistance that is produced by the flexible printing substrate, makes optics successfully mobile lens barrel and camera head along optical axis.

In order to reach above-mentioned purpose, the lens barrel that the utility model is related is characterized in that, possesses:

Shell, it accommodates a plurality of lens;

Optics, it moves along optical axis in described shell;

The flexible printing substrate, it is around described optical axis bending, and an end is connected in described optics, and the other end is electrically connected on the control part of the described optics of control.

In this lens barrel, for the optics that moves along optical axis, the flexible printing substrate is bent installation in the mode that centers on optical axis.Thus, because of the bending radius change of flexible printing substrate is big, so can lower the elasticity of flexible printing substrate.Therefore, can positively reduce the resistance that produces by the flexible printing substrate, optics successfully be moved along optical axis.

Herein, in lens barrel, the flexible printing substrate is fit to the bent around along optics.By such formation, when the bending radius of flexible printing substrate is more strengthened, can effectively apply flexibly limited receiving space.

And the camera head that the utility model is related is characterized in that, possesses: above-mentioned lens barrel and, detect imaging apparatus by the light of lens imaging.

According to this camera head, because of possessing above-mentioned lens barrel is arranged, so can positively reduce resistance, optics is moved along optical axis by the flexible printing substrate.

According to the utility model, can positively reduce the resistance that produces by the flexible printing substrate, optics is successfully moved along optical axis.

Description of drawings

Fig. 1 is the stereographic map of an embodiment of the related camera head of the utility model.

Fig. 2 is the exploded perspective view of the camera head of Fig. 1.

Fig. 3 is the cut-away view of the camera head of Fig. 1.

Fig. 4 is the stereographic map of driver element of the camera head of Fig. 1.

Fig. 5 is the shutter/Zoom lens unit of camera head of Fig. 1 and the stereographic map of flexible printing substrate.

Among the figure: 1-camera head, 2-lens barrel, 3-imaging apparatus, 4-shell, 11-fixed lens, 12-shutter/Zoom lens unit, 13-zoom condenser lens unit, 21,24-step motor (CD-ROM drive motor), 32-flexible printing substrate.

Embodiment

Below, describe preferred forms of the present utility model in detail with reference to accompanying drawing.In addition, in each figure same or considerable part are enclosed prosign, the repetitive description thereof will be omitted.

At Fig. 1 is the stereographic map of an embodiment of the related camera head of the utility model.As shown in Figure 1, camera head 1 possesses: opposed bottom surface is an oblong-shaped, and imaging apparatuss 3 such as the lens barrel 2 of the also short rectangular shape in each limit of aspect ratio bottom surface and CMOS.Lens barrel 2 is suitable for the flexing optical system.Thus, in camera head 1, along with the short transverse of lens barrel 2 (below, only claim " short transverse ") parallel optical axis L 1 from the light of object side incident by 90 ° of lens barrel 2 flexings, and along with the long side direction of the bottom surface of lens barrel 2 (below, single claim " long side direction ") parallel optical axis L 2, and by imaging apparatus 3 detections.

Fig. 2 is the exploded perspective view of the camera head of Fig. 1, and Fig. 3 is the cut-away view of the camera head of Fig. 1.Shown in Fig. 2,3, lens barrel 2 possesses case shape shell 4 is arranged.Shell 4 has: be formed with peristome 5a towards imaging apparatus 3 side openings, and be formed with towards the body 5 of the peristome 5b of side's side opening and the cap 6 that covers the peristome 5a of body 5 with the long side direction quadrature and with the direction of short transverse quadrature at long side direction.Body 5 and cap 6 are for example formed by the glass fibre polycarbonate respectively, and integrally formed by injection molding.

At the table wall of body 5 (promptly, the wall of bottom surface with object side of lens barrel 2) is formed with to make from object side and advances and the light that comes enters light in the body 5 by hole 5c, be equipped with at the table wall of body 5 and cover the light transmission plate 7 of light by hole 5c along optical axis L 1.In addition, also can use lens to replace light transmission plate 7.In shell 4, dispose and on optical axis L 1, be positioned at the rear side of light by hole 5c, make 90 ° of light flexings so that along the prism 8 of optical axis L 2 along optical axis L 1 from subject incident.And, in shell 4, dispose the fixed lens 11 of the front side that on optical axis L 2, is positioned at imaging apparatus 3.Prism 8 is kept by body 5, and fixed lens 11 is kept by cap 6.

In addition, on long side direction, the end of the body 5 of imaging apparatus 3 opposition sides since the inwall of body 5 (promptly, have wall with the bottom surface of the subject opposition side of lens barrel 2) become crank-like and form notch 5d by flexing, therefore, compare by slimming (downsizing) with other parts of body 5.So, but on long side direction the end of the body 5 of thin type photographing element 3 opposition sides, be because taken into full account the amount of thickness of prism 8 of the inside of the end that is disposed at body 5.

Further, in shell 4, dispose: be positioned at the shutter/Zoom lens unit (optics) 12 of the rear side of prism 8 on the optical axis L 2, reaching in the zoom condenser lens unit 13 between shutter/Zoom lens unit 12 and fixed lens 11 on the optical axis L 2.

Shutter/Zoom lens unit 12 includes: optionally carry out advancing and pass through and the shutter of blocking, reach zoom lens of the light that comes along optical axis L 2.Shutter/Zoom lens unit 12 has: with in shell 4 with respect to optical axis L 2 be located at for thirty years of age the axis of guide 14 engagings of peristome 5b side holding section 12a cylindraceous, and be located at the U word ditch shape holding section 12b that the only turning axle 15 of peristome 5b opposition side engages for thirty years of age with relative optical axis L in shell 42.Thus, shutter/Zoom lens unit 12 can move along optical axis L 2 with the state of restriction around optical axis L 2 rotations.

Zoom condenser lens unit 13 includes the zoom condenser lens.Zoom condenser lens unit 13 has: with in shell 4, be located at the holding section 13a cylindraceous that the axis of guide 16 of peristome 5b side engages for thirty years of age and be sticked in the only holding section 13b of the U word ditch shape of turning axle 15 with respect to optical axis L 2.Thus, zoom condenser lens unit 13 can move along optical axis L 2 with the state of restriction around optical axis L 2 rotations.In addition, the axis of guide 14 and the axis of guide 16 are set up in parallel on short transverse.

In the peristome 5b of body 5, dispose driver element 17.Fig. 4 is the stereographic map of driver element of the camera head of Fig. 1.As shown in Figure 4, driver element 17 has the laminal installation portion 18a of rectangle and comprises the upright laminal support portion 18b of rectangle at the two ends of its long side direction, the support component 18 of 18c be located at.Support component 18 is by crooked stainless sheet steel and integrally formed.

Step motor (CD-ROM drive motor) 21 is installed in the outside of support portion 18b.The both ends of the leading screw 22 of step motor 21 are supported by axle by

support portion

18b, 18c, and the part between the support portion of leading screw 22 18b, 18c screws togather the transmission nut 23 with protuberance 23a.In addition, step motor (CD-ROM drive motor) 24 is installed in the outside of support portion 18c.The both ends of the leading screw 25 of step motor 24 are supported by

support portion

18b, 18c axle, and the part between the support portion of leading screw 25 18b, 18c screws togather the transmission nut 26 with protuberance 26a.In addition, leading screw 22 and leading screw 25 are set up in parallel the upright set direction at

support portion

18b, 18c.

Shown in Fig. 2,3, driver element 17 is so that the upright set direction mode consistent with short transverse of

support portion

18b, 18c is disposed in the peristome 5b of body 5, and installation portion 18a is fixed at the table wall of body 5 and is installed in body 5.Like this, in driver element 17, differently dispose step motor 21 and step motor 24 mutually, and approachingization that can seek leading screw 22 and leading screw 25.Thus, driver element 17 helps the slimming of body 5 and even lens barrel 2.

The protuberance 23a that is screwed together in the transmission nut 23 of leading screw 22 is embedded in the recess of the holding section 12c that shutter/Zoom lens unit 12 had.Thus, if by step motor 21 rotating threaded shafts 22, then shutter/Zoom lens unit 12 moves along optical axis L 2.On the other hand, the protuberance 26a that is screwed together in the transmission nut 26 of leading screw 25 is embedded in the recess of the holding section 13c that zoom condenser lens unit 13 has.Thus, if by step motor 24 rotating threaded shafts 25, then zoom condenser lens unit 13 moves along optical axis L 2.

Cap 6 at shell 4 is equipped with circuit substrate 27, and this circuit substrate 27 is provided with the imaging apparatus 3 of the rear side that is positioned at fixed lens 11 on optical axis L 2 at inner face.Inner face at circuit substrate 27 also is provided with fast gate drive circuit (control part) or motor drive circuit etc., is provided with the connector connectivity port 28 that is used for circuit substrate 27 output input electrical signals in the outside of circuit substrate 27.Flexible printed board by being disposed at sidewall outer relative with peristome 5a in body 5 and the sidewall outer relative of each

step motor

21,24 of driver element 17 and motor drive circuit (below, be called " FPC ") 31 and being electrically connected with peristome 5b.The FPC32 of the shutter of shutter/Zoom lens unit 12 and the fast gate drive circuit outside by in body 5, extending to the sidewall relative and the FPC31 that is electrically connected with FPC32 and be electrically connected with peristome 5b.

Fig. 5 is the stereographic map that expression is installed in the FPC of shutter/Zoom lens unit.As shown in Figure 5, when FPC32 sees from optical axis L 2 directions, in being no more than the scope on every side of shutter/Zoom lens unit 12, around shutter/Zoom lens unit 12, be bent around optical axis L 2.That is, FPC32 is with around the mode of the shifting axle of shutter/Zoom lens unit 12 and by big macrobending.And the end 32b of FPC32 is connected in the shutter of shutter/Zoom lens unit 12, and on the other hand, the end 32c of FPC32 is fixed on shell 4, is electrically connected with the fast gate drive circuit of the outside that is located at circuit substrate 27.In addition, also can when optical axis L 2 directions are seen, surpass shutter/Zoom lens unit 12 around dispose FPC32.

The FPC31 that is disposed at the driver element 17 in the peristome 5b of body 5 and is disposed at the outside of the sidewall relative with peristome 5a at body 5 covers by being become the integrally formed outer dress lid 33 of L word shape by the thin plate bending that stainless steel forms.And the circuit substrate 27 that is disposed at the FPC31 of sidewall outer relative with peristome 5b in body 5 and is installed on the cap 6 of shell 4 covers by being become the integrally formed outer dress lid 34 of L word shape by the thin plate bending that stainless steel forms.

Outer dress cover 33 and adorn and cover 34 bights that removably are sticked in sidewall relative with peristome 5a in body 5 and the cross sidewalls relative with peristome 5b outward, sells the cap 6 that is fixed on shell 4 at body 5 with peristome 5a and the folded bight of peristome 5b.And outer casing 34 is electrically connected with the ground terminal of circuit substrate 27, further, each

outer dress cover

33,34 with the table wall that is formed on body 5 by evaporation etc. outside and metal film outside the inner face be electrically connected.Thus, each component parts of camera head 1 is covered by electromagnetic shielding film.In addition, dress covers in 34 connector connectivity port 28 corresponding parts with circuit substrate 27 by otch, so that connector can be connected with connector connectivity port 28 outside.

As described above, in the utility model related lens barrel 2 and camera head 1, FPC32 centers on optical axis L 2 and the crooked shutter/Zoom lens unit 12 that moves along optical axis L 2 that is installed in.Thus, it is big that the bending radius of FPC32 becomes, so can lower the elasticity of FPC32.Therefore, can positively reduce the resistance that produces by FPC32, shutter/Zoom lens unit 12 is successfully moved along optical axis L 2.Its result can alleviate the load that makes the step motor 21 that shutter/Zoom lens unit 12 moves.

And therefore lens barrel 2 and the camera head 1 related according to present embodiment, FPC32, when the bending radius of FPC32 is more strengthened, can effectively apply flexibly limited receiving space around shutter/Zoom lens unit 12 and be bent.

The utility model is not limited to above-mentioned embodiment.

For example, exemplify as optics shutter/Zoom lens unit 12 has been described, but also can be the aperture parts, main is, as long as the parts that move towards optical axis direction can.

And, in the above-described embodiment, the joint of FPC32 and shutter/Zoom lens unit 12 has been illustrated that the end 32b of FPC32 is directly connected in the situation of shutter/Zoom lens unit 12, but also can be situation about connecting indirectly, main is that being connected with the parts that move gets final product.

And, in the above-described embodiment, mode with rotation around shutter/Zoom lens unit 12 has been installed FPC32, even but for being mounted to spiral helicine situation around optical axis, because of bending radius becomes big, so can positively reduce the resistance that produces by FPC32, and can alleviate the load that makes the step motor 21 that shutter Zoom lens unit 12 moves.

And lens barrel 2 is not limited to be suitable for the flexing optical system, also can be suitable for collapsible optical system etc.

Claims

1. lens barrel is characterized in that possessing:

Shell, it accommodates a plurality of lens;

Optics, it moves along optical axis in described shell;

2. lens barrel according to claim 1 is characterized in that,

Described flexible printing substrate is along the bent around of described optics.

3. camera head is characterized in that possessing:

Claim 1 or 2 described lens barrels;

Detection is by the imaging apparatus of the light of described lens imaging.