CN101144891A - Lens barrel and image pick-up device - Google Patents
Lens barrel and image pick-up device Download PDFInfo
- Publication number
- CN101144891A CN101144891A CNA2007101496979A CN200710149697A CN101144891A CN 101144891 A CN101144891 A CN 101144891A CN A2007101496979 A CNA2007101496979 A CN A2007101496979A CN 200710149697 A CN200710149697 A CN 200710149697A CN 101144891 A CN101144891 A CN 101144891A
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- optical axis
- revolving drum
- guide cylinder
- lens barrel
- lens
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Abstract
The invention relates to a lens barrel, comprising a lens group, a lens driving device and a fixing cylinder. The lens driving device is provided with at least one rotary drum (8) and at least one advance guiding cylinder (9) which rotates relative to the rotary drum and advances at the direction of optical axis along with rotary drum. The advance guiding cylinder has at least one key part (9b) with a surface orthogonal with the optical axis and a key groove (8a) is allocated in the inner face of the rotary drum to embed with the key part, in order to make the advance guiding cylinder and the rotary drum relatively rotate and move along the direction of optical axis in one body. A flange (9c) projecting towards the direction of optical axis is formed near the key part in the advance guiding cylinder, so that the surface orthogonal with the optical axis grips the rotary drum. The invention provides a lens barrel and a camera, which will not gnerate low intension due to thinning the wall thickness of the rotary drum and will not arose marco-scale and can increase the intension of load on the lens barrel from the outside such as impact.
Description
Technical field
The present invention relates to digital camera, video camera, the improvement of the lens barrel of equipping in the camera head that is provided with zoom mechanism of silver halide photography machine etc., and the camera head that this lens barrel is housed.
Background technology
As digital camera, video camera, the lens barrel of equipping in the camera head that is provided with zoom mechanism of silver halide photography machine etc., be provided with imaging apparatus, plural number lens and lens driver, known for people, described plural lens are used for relative imaging apparatus makes shot object image imaging, described lens driver be used to make plural lens advance and retreat to move to institute's allocation.
As the lens driver that is used for minicam in recent years, by an above revolving drum, directly advance guide cylinder and a formation such as above lens holding cylinder more than one, described revolving drum is a center steering with the central shaft parallel with optical axis, advance and retreat along optical axis direction, describedly directly advance guide cylinder and do not turn round, advance and retreat along optical axis direction, described lens holding cylinder does not keep lens pivotally, and along the optical axis direction advance and retreat, cripetura is taken in when not using, extend along optical axis direction during use, each lens is remained on institute's allocation, be made as the distance that focuses, this pattern is that people are known.
Along with the miniaturization of camera, the lens barrel miniaturization also obtains progress rapidly, and exploitation has the lens barrel of the multistage concertina type of two above revolving drums.For example, open among the 2006-039153, disclose following lens barrel: be provided with the lens combination of forefront, and the 1st lens mount that is used to keep lens combination, directly advance guide cylinder and a stationary magazine creel, keep the 1st lens mount advance and retreat by two revolving drums and two the spy.
The lens barrel of multistage concertina type that is used for miniaturization is for guaranteeing that lens displacement is extraordinary means, and along with hop count increases, from optical axis direction, the projected area of lens barrel (outside dimension) thickness increases.In order to reduce projected area, need attenuate to constitute the thickness of the cartridge unit of each section.But, if the thickness of each cartridge unit of attenuate,, easily destroy when because of falling etc. when causing impact.
Fig. 5 represents that the spy opens the cross section of disclosed lens barrel among the 2006-039153 when shrinking (when stretching out and state).The outer peripheral edges of the 1st lens mount 1 are being kept by the 1st lens holding cylinder 5, the 1st lens holding cylinder 5 outer circumferential sides are kept by the 2nd revolving drum 6, simultaneously, interior all sides are directly advanced guide cylinder 7 by the 2nd and are kept, directly to advance the bung flange 9A of guide cylinder 9 internal diameters chimeric with being formed on the 1st for the 2nd revolving drum 6, the 2nd directly advances guide cylinder 7 allows the revolution of the 2nd revolving drum 6, and directly advances guide cylinder 9 by the 1st and keeping, and can directly advance mobile.The 1st revolving drum 8 is local chimeric with the bung flange 10a that is formed on stationary magazine creel 10 internal diameters, supports to turning round.The 1st directly advances the revolution that guide cylinder 9 is allowed the 1st revolving drum 8, and can directly advance mobile by stationary magazine creel 10.Internal diameter at the 1st revolving drum 8 is provided with revolution keyway 8a, it has the internal face with the optical axis direction orthogonal, be located at the 1st revolution key 9b that directly advances guide cylinder 9 outer peripheral faces and be entrenched in this revolution keyway 8a, the 1st revolving drum 8 and the 1st directly advances guide cylinder 9 relative revolutions, moves along optical axis direction.The 1st revolving drum 8 is connected by revolution drive pin (not diagram) with the 2nd revolving drum 6, is used to transmit the turning power of the 1st revolving drum 8, and is chimeric by bung flange respectively by making 8 revolutions of the 1st revolving drum, can advance and retreat along optical axis direction.The 1st lens holding cylinder 5 has the lens drive pin at its peripheral part, this lens drive pin is chimeric with the cam path that is located on the 2nd revolving drum 6 internal diameters, and it is chimeric that the 1st lens holding cylinder 5 directly advances guide cylinder 7 with the gathering sill and the 2nd that is located at optical axis direction, can make lens move to and the cam face consistent location.
In the above-described configuration, when the direction of arrow applied load F to the 1st lens holding cylinder 5 along figure from optical axis direction the place ahead, this power was delivered to the 2nd revolving drum 6, is applied to the 1st by bung flange 9A and directly advances on the guide cylinder 9.Impact the even load high field and close, the 1st directly advances guide cylinder 9 inboard distortion, and revolution key 9b departs from the revolution keyway 8a of the 1st revolving drum 8, and the 1st directly advances guide cylinder 9 falls into from the 1st revolving drum 8, and lens barrel destroys.
Open among the 2005-017418 the spy, thicken the 1st thickness that directly advances guide cylinder 9, prevent that the 1st directly advances the distortion of guide cylinder, strengthen shock-resistant etc. by the part.But in this mode, each revolving drum external diameter is certain, needs attenuate revolving drum wall thickness, has the problem of infringement revolving drum intensity.
Patent documentation 1: the spy opens the 2005-017418 communique
Summary of the invention
The present invention puts forward for solving above-mentioned existing in prior technology problem, the objective of the invention is to, lens barrel and camera head are provided, can not cause that intensity is low because of attenuate revolving drum wall thickness, maximization can be do not caused, the intensity that the load that relatively is applied to lens barrel from the outside is for example impacted etc. can be improved.
To achieve these goals, the present invention proposes following scheme:
(1) a kind of lens barrel comprises:
Lens combination makes shot object image be imaged on the shooting face;
Lens driver keeps at least one of described lens combination, makes it move to institute's allocation along optical axis direction;
Stationary magazine creel is used to keep described lens driver;
By the contraction state of at least a portion from take in described lens combination, make that at least a portion moves to object side in the described lens combination, become photography state; It is characterized in that:
Described lens driver is provided with at least one rotating revolving drum, and at least one directly advances guide cylinder, and this directly advances the described relatively revolving drum of guide cylinder and does revolution relatively, and directly advances mobile with described revolving drum one along optical axis direction;
Describedly directly advance guide cylinder and be provided with at least one key portion in its outside, described key portion has the face with the optical axis direction orthogonal, be provided with chimeric keyway at described revolving drum inner face, make and describedly directly advance guide cylinder and can turn round relatively, and can one move along optical axis direction with described revolving drum with described key portion;
Describedly directly advance guide cylinder and near described key portion, have towards the outstanding flange part of optical axis direction, so as with the described revolving drum of face clamping of optical axis direction orthogonal.
(2) in the lens barrel of (1) record, it is characterized in that:
Dispose two flange parts, from the above-mentioned key of one of circumferential sandwich portion.
(3) in the lens barrel of (1) or (2) record, it is characterized in that:
Described revolving drum is provided with drive division at its outer diameter part and is used to accept turning power transmission revolution from the outside, and described flange part external diameter is set at littler than the minimum diameter of described drive division.
(4) in the lens barrel of any record of (1)-(3), it is characterized in that:
Directly advance guide cylinder with about 120 ° circumferential interval described, dispose described key portion at three places, described flange part disposes at six places.
(5) a kind of camera head is characterized in that:
Be provided with the lens barrel of any record in above-mentioned (1)-(4).
The following describes effect of the present invention
In lens barrel of the present invention, directly advance near the first key portion of guide cylinder first, be provided with 2 towards the outstanding flange part of optical axis direction, so that with two face clamping first revolving drums of optical axis direction orthogonal, even brute force such as impacted when lens barrel stretches out from the lens barrel front, also can prevent that first directly advances the distortion of guide cylinder, prevent lens barrel and destroy by flange part.
In lens barrel of the present invention, be the center with the centre of gyration of first revolving drum, at two flange parts of gyratory directions configuration, lens barrel intensity can improve in the clamping first key portion, simultaneously, when making the first key portion with resin material, can make that metal pattern is simple in structure.
In lens barrel of the present invention, the profile portion of first revolving drum has gear part, transmits rotating drive division as accepting from the turning power of outside, and the external diameter of flange part is set at littler than the minimum diameter of gear part, can keep under the lens barrel diameter state, strengthen lens barrel.
Directly advance on the guide cylinder first, first 9b of key portion with roughly at interval 120 ° be arranged on three places, first flange part is configured in six places, therefore, power that can lens barrel is suffered is distributed to each flange part equably, can improve the intensity as lens barrel.
By lens barrel of the present invention is applicable to digital camera, video camera, the silver halide photography machine, other are provided with the camera head of zoom mechanism lens barrel, can provide anti-impulse force power strong camera head.
Description of drawings
Fig. 1 (a) is the longitudinal section of the lens barrel that relates to of one embodiment of the invention, and Fig. 1 (b) is the major part enlarged drawing of epimere.
Fig. 2 is that the 1st revolving drum and the 1st directly advances the exploded perspective view that guide cylinder constitutes.
Fig. 3 is the outboard profile that the 1st revolving drum and the 1st directly advances the guide cylinder assembled state.
Fig. 4 the 1st directly advances the front view (FV) of guide cylinder.
Fig. 5 is the longitudinal section of the lens barrel that relates to of conventional art.
Embodiment
Below, with reference to accompanying drawing, describe embodiments of the invention in detail.
Fig. 1 (a) is the longitudinal section of the lens barrel that relates to of one embodiment of the invention, Fig. 1 (b) is the major part enlarged drawing of epimere, Fig. 2 is that the 1st revolving drum and the 1st directly advances the exploded perspective view that guide cylinder constitutes, Fig. 3 is the outboard profile that the 1st revolving drum and the 1st directly advances the guide cylinder assembled state, and Fig. 4 the 1st directly advances the front view (FV) of guide cylinder.
The lens barrel that one embodiment of the invention relates to roughly comprises first lens combination 1, second lens combination 2, the 3rd lens combination 3, the 4th lens combination 4, be used to keep first lens holding cylinder 5 of first lens combination 1, be configured in second revolving drum 6 of first lens holding cylinder, 5 outside diameters, be positioned at second of first lens holding cylinder, 5 internal side diameters and directly advance guide cylinder 7, be configured in first revolving drum 8 of second revolving drum, 6 outside diameters, be configured in first between first revolving drum 8 and second revolving drum 6 and directly advance guide cylinder 9, support the stationary magazine creel 10 that first revolving drum 8 and first directly advances guide cylinder 9 with inner peripheral surface, imaging apparatus (CCD) 11.
First revolving drum 8, second revolving drum 6, first directly advance guide cylinder 9 and second and directly advance guide cylinder 7 and constitute lens driver D, described directly advance guide cylinder relatively each revolving drum can turn round relatively, and become one and can directly advance mobile along optical axis direction with each revolving drum.
First lens holding cylinder 5 is provided with lens drive pin 5a at the suitable place of its peripheral part, and this lens drive pin 5a is chimeric with the spiral helicine cam path 6a that is located at second revolving drum, 6 internal diameters, remains on second revolving drum 6.Therefore, by 6 revolutions of second revolving drum, first lens holding cylinder 5 can move along the optical axis direction straight line.Second directly advances guide cylinder 7 grooves is entrenched on first lens holding cylinder, 5 internal diameters, and it can be done relative to directly advancing to move.
Directly advance the prominent 7a of key portion that establishes on the rear end outer peripheral face of guide cylinder 7 second, the 7a of this key portion is chimeric with the spiral helicine cam path 6b that is located at the second revolving drum inner peripheral surface, and second directly advances guide cylinder 7 and the 6 relative revolutions of second revolving drum, and moves along the optical axis direction one.That is, with the face of optical axis direction orthogonal, it is chimeric that the keyway 6b and second of second revolving drum 6 directly advances the 7a of key portion of guide cylinder 7.
Directly to advance helicoid (helicoid) 9A of guide cylinder 9 internal diameters chimeric with being located at first for second revolving drum 6, second directly advance guide cylinder 7 directly advance the 7b of key portion be located at first directly advance guide cylinder 9 internal diameters directly to advance gathering sill 9a chimeric so that make second directly to advance guide cylinder 7 and first and directly advance guide cylinder 9 and can directly advance mobile at optical axis direction.
First revolving drum 8 and second revolving drum 6 are by chimeric can one revolution of chimeric pin (not diagram), the spiral fashion of first revolving drum 8 is the first keyway 8a, and directly to advance first 9b of key portion of guide cylinder 9 chimeric with internal face and the first optical axis direction orthogonal, make the revolving drum 8 and first of winning directly advance guide cylinder 9 and can one move, and can turn round relatively along optical axis direction.Like this, by the revolution of first revolving drum 8, second revolving drum 6 is advanced and retreat while turn round along being located at the first helicoid 9A that directly advances guide cylinder 9 internal diameters, and second directly advances guide cylinder 7 directly advances along optical axis direction.
First revolving drum 8 is chimeric with helicoid with stationary magazine creel 10 internal diameters that keep CCD11, first directly advance guide cylinder 9 be located at stationary magazine creel 10 internal diameters along optical axis direction directly to advance gathering sill 10a chimeric.On stationary magazine creel 10, be provided with the motor and the plural gear that are used to drive first revolving drum 8, chimeric with first revolving drum 8.Like this, obtain turning power, make revolving drum 8 revolutions of winning, directly advance guide cylinder 9, the second revolving drums 6, the second by first again and directly advance guide cylinder 7, the lens holding cylinder 5 of winning is advanced and retreat along optical axis direction by gear from motor.
Then, as Fig. 2,3, shown in 4, with 120 ° of intervals roughly first 9b of key portion is set at first outer peripheral face that directly advances guide cylinder 9, near this first key 9b of portion, be provided with 2 towards the outstanding flange part 9c of optical axis direction, be located at three places respectively, add up to 6 flange part 9c, with the end of face clamping first revolving drum 8 of optical axis direction orthogonal.That is, 9d be from the outer peripheral face at the rear of first 9b of key portion to the outstanding projection of external diameter direction, flange part 9c is suitable for the optical axis direction projection outstanding towards the place ahead from the front of described projection 9d, be configured to push first revolving drum 8 end edge above.As shown in Figure 4, two flange part 9c are set,, during resin forming, can make that metal pattern simplifies the structure from circumferencial direction sandwich first 9b of key portion.
In the above-described configuration, powerful occasion such as impacted from optical axis the place ahead of first lens holding cylinder 5, its Stress Transfer is applied on second revolving drum 6 that is configured in outside diameter to lens drive pin 5a.The impulsive force that is delivered to second revolving drum 6 is delivered to first by helicoid 9A and directly advances guide cylinder 9.First directly advances guide cylinder 9 desires to move towards the rear because of this impulsive force, but because first 8a of key portion and first 9b of key portion of first revolving drum 8 are chimeric, can not move vertically.But, apply the large impact field of force and close, first directly advances guide cylinder 9 internal side diameters begins distortion, and desire is removed the chimeric of first 8a of key portion and first 9b of key portion.At this moment, the outer peripheral face of the internal diameter of the first flange part 9c and first revolving drum 8 is interfered, and suppresses first and directly advances the distortion of guide cylinder 9 internal side diameters.Under this state, not only first directly advances guide cylinder 9 monomer intensity, and add the intensity of first revolving drum 8, can performance directly advance the identical stiffening effect of guide cylinder 9 wall thickness with increase by first, can prevent that first directly advances the internal side diameter distortion of guide cylinder 9, as lens barrel integral body, the intensity that fast light direction of principal axis impacts is enhanced.
The external diameter that makes the flange part 9c that wins is littler than the path (bottom) of the gear part that is located at first revolving drum, 8 peripheries (be subjected to from the turning power of outside and rotating drive division) 8b and spire, first revolving drum 8 can turn round without let or hindrance, there is no need the wall thickness of attenuate first revolving drum 8, also there is no need to increase.
Be located at first first 9b of key portion that directly advances guide cylinder 9 outer peripheral faces with roughly 120 ° of settings at interval, can disperse to be applied to the power of the first flange part 9c equably, can reduce to make the power of flange part 9c distortion of winning, can improve impact resistance as lens barrel.
According to the present invention, can provide small-sized, and can improve the lens barrel that the load of lens barrel is for example impacted etc.
Promptly, in lens barrel of the present invention, directly advance near first 9b of key portion of guide cylinder 9 first, be provided with 2 towards the outstanding flange part 9c of optical axis direction, so that with the rearward end of two face clamping first revolving drums 8 of optical axis direction orthogonal, even brute force such as impacted when lens barrel stretches out from the lens barrel front, also can prevent that first directly advances the distortion of guide cylinder by flange part, prevent lens barrel and destroy.
In lens barrel of the present invention, be the center with the centre of gyration of first revolving drum 8, at two flange part 9c of gyratory directions configuration, clamping first 9b of key portion can improve lens barrel intensity, simultaneously, when making the first key portion, can make that metal pattern is simple in structure with resin material.
In lens barrel of the present invention, the profile portion of first revolving drum 8 has gear part 8b, transmits rotating drive division as accepting from the turning power of outside, and the external diameter of flange part 9c is littler than the minimum diameter of gear part 8b, can keep under the lens barrel diameter state, strengthen lens barrel.
Directly advance on the guide cylinder 9 first, first 9b of key portion with roughly at interval 120 ° be arranged on three places, the first flange part 9c is configured in six places, therefore, power that can lens barrel is suffered is distributed to each flange part equably, can improve the intensity as lens barrel.
By lens barrel of the present invention is applicable to digital camera, video camera, the silver halide photography machine, other are provided with the camera head of zoom mechanism lens barrel, can provide anti-impulse force power strong camera head.
Above with reference to description of drawings embodiments of the invention, but the present invention is not limited to the foregoing description.Can do all changes in the technology of the present invention thought range, they all belong to protection scope of the present invention.
Claims (5)
1. lens barrel comprises:
Lens combination makes shot object image be imaged on the shooting face;
Lens driver keeps at least one of described lens combination, makes it move to institute's allocation along optical axis direction;
Stationary magazine creel is used to keep described lens driver;
By the contraction state of at least a portion from take in described lens combination, make that at least a portion moves to object side in the described lens combination, become photography state; It is characterized in that:
Described lens driver is provided with at least one rotating revolving drum, and at least one directly advances guide cylinder, and this directly advances the described relatively revolving drum of guide cylinder and does revolution relatively, and directly advances mobile with described revolving drum one along optical axis direction;
Describedly directly advance guide cylinder and be provided with at least one key portion in its outside, described key portion has the face with the optical axis direction orthogonal, be provided with chimeric keyway at described revolving drum inner face, make and describedly directly advance guide cylinder and can turn round relatively, and can one move along optical axis direction with described revolving drum with described key portion;
Describedly directly advance guide cylinder and near described key portion, have towards the outstanding flange part of optical axis direction, so as with the described revolving drum of face clamping of optical axis direction orthogonal.
2. according to the lens barrel of record in the claim 1, it is characterized in that:
Dispose two flange parts, from the above-mentioned key of one of circumferential sandwich portion.
3. according to the lens barrel of record in claim 1 or 2, it is characterized in that:
Described revolving drum is provided with drive division at its outer diameter part and is used to accept turning power transmission revolution from the outside, and described flange part external diameter is set at littler than the minimum diameter of described drive division.
4. according to the lens barrel of any record among the claim 1-3, it is characterized in that:
Directly advance guide cylinder with about 120 ° circumferential interval described, dispose described key portion at three places, described flange part disposes at six places.
5. camera head is characterized in that:
Be provided with the lens barrel of record among any of claim 1-4.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP251945/06 | 2006-09-15 | ||
| JP2006251945A JP4966615B2 (en) | 2006-09-15 | 2006-09-15 | Lens barrel and imaging device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101144891A true CN101144891A (en) | 2008-03-19 |
| CN101144891B CN101144891B (en) | 2010-06-02 |
Family
ID=39207504
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2007101496979A Expired - Fee Related CN101144891B (en) | 2006-09-15 | 2007-09-13 | Lens barrel and image pick-up device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4966615B2 (en) |
| CN (1) | CN101144891B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104067156A (en) * | 2012-01-30 | 2014-09-24 | 富士胶片株式会社 | Lens device |
| CN110418046A (en) * | 2019-08-05 | 2019-11-05 | Oppo广东移动通信有限公司 | Terminal device and image pickup method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6478199B2 (en) * | 2014-02-28 | 2019-03-06 | 三星電子株式会社Ｓａｍｓｕｎｇ Ｅｌｅｃｔｒｏｎｉｃｓ Ｃｏ．，Ｌｔｄ． | Lens barrel and optical equipment |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3402391B2 (en) * | 1993-02-17 | 2003-05-06 | オリンパス光学工業株式会社 | Lens barrel |
| JP4599676B2 (en) * | 2000-07-13 | 2010-12-15 | 株式会社ニコン | Lens barrel |
| JP3949979B2 (en) * | 2002-02-27 | 2007-07-25 | オリンパス株式会社 | Lens barrel |
| JP2003090947A (en) * | 2001-09-18 | 2003-03-28 | Olympus Optical Co Ltd | Zoom lens barrel |
| JP4181896B2 (en) * | 2003-02-26 | 2008-11-19 | キヤノン株式会社 | Lens barrel and imaging device |
| JP4387702B2 (en) * | 2003-06-24 | 2009-12-24 | キヤノン株式会社 | Lens barrel |
-
2006
- 2006-09-15 JP JP2006251945A patent/JP4966615B2/en not_active Expired - Fee Related
-
2007
- 2007-09-13 CN CN2007101496979A patent/CN101144891B/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104067156A (en) * | 2012-01-30 | 2014-09-24 | 富士胶片株式会社 | Lens device |
| CN104067156B (en) * | 2012-01-30 | 2015-09-09 | 富士胶片株式会社 | Lens devices |
| CN110418046A (en) * | 2019-08-05 | 2019-11-05 | Oppo广东移动通信有限公司 | Terminal device and image pickup method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4966615B2 (en) | 2012-07-04 |
| CN101144891B (en) | 2010-06-02 |
| JP2008070846A (en) | 2008-03-27 |
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Granted publication date: 20100602 Termination date: 20190913 |