JP2003066308A - Zoom lens barrel - Google Patents
Zoom lens barrelInfo
- Publication number
- JP2003066308A JP2003066308A JP2001254577A JP2001254577A JP2003066308A JP 2003066308 A JP2003066308 A JP 2003066308A JP 2001254577 A JP2001254577 A JP 2001254577A JP 2001254577 A JP2001254577 A JP 2001254577A JP 2003066308 A JP2003066308 A JP 2003066308A
- Authority
- JP
- Japan
- Prior art keywords
- barrel
- optical axis
- axis direction
- cam
- straight
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Lens Barrels (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ズームレンズ鏡胴
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a zoom lens barrel.
【０００２】[0002]
【従来の技術】従来、例えば、撮影時にはカメラ本体か
ら繰り出し、不使用時にはカメラ本体内に沈胴するズー
ムレンズ鏡胴が種々提供されている。この種のズームレ
ンズ鏡胴は、一般に、複数の筒で構成され、沈胴状態か
ら筒が繰り出すようになっている。2. Description of the Related Art Conventionally, for example, various zoom lens barrels have been provided which are extended from a camera body during photographing and retracted inside the camera body when not in use. This type of zoom lens barrel is generally composed of a plurality of barrels, and the barrels are extended from the retracted state.
【０００３】例えば、２つの筒からなる中間筒ユニット
について、移動量が小さい２つのカムを同一筒の同一面
に形成したズームレンズ鏡胴が提供されている。For example, for an intermediate cylinder unit consisting of two cylinders, there is provided a zoom lens barrel in which two cams having a small movement amount are formed on the same surface of the same cylinder.
【０００４】また、１段繰り出し鏡胴で、内側固定筒と
外側固定筒とに挟まれたカム環の外面と内面とにカムを
配置したズームレンズ鏡胴が提供されている。このズー
ムレンズ鏡胴では、カム環は、内側固定筒又は外側固定
筒に光軸方向一体かつ回転自在に保持されており、内側
固定筒及び外側固定筒はカメラ本体に固着されるように
なっている。Further, there is provided a zoom lens barrel in which a cam is arranged on the outer surface and the inner surface of a cam ring sandwiched between an inner fixed barrel and an outer fixed barrel in a one-stage extension barrel. In this zoom lens barrel, the cam ring is integrally and rotatably held in the inner fixed barrel or the outer fixed barrel in the optical axis direction, and the inner fixed barrel and the outer fixed barrel are fixed to the camera body. There is.
【０００５】[0005]
【発明が解決しようとする課題】ところで、沈胴時のズ
ームレンズ鏡胴の寸法を小さくするには、各筒の光軸方
向の寸法を小さく、多段構造とすればよい。しかし、光
軸方向の寸法を小さくすると、２つのレンズ群を駆動す
るためのカム同士が交差するため、同一筒の同一面にそ
れらのカムを構成できない。これを避けるために２つの
レンズそれぞれにカム筒と直進筒を設けると、それだけ
スペースが必要となり、ズームレンズ鏡胴の小型化に反
する。By the way, in order to reduce the size of the zoom lens barrel when retracted, the size of each tube in the direction of the optical axis may be reduced and a multi-stage structure may be adopted. However, when the size in the optical axis direction is reduced, the cams for driving the two lens groups intersect with each other, and therefore the cams cannot be formed on the same surface of the same cylinder. If a cam barrel and a rectilinear barrel are provided for each of the two lenses in order to avoid this, a space is required accordingly, which is against the downsizing of the zoom lens barrel.
【０００６】したがって、本発明が解決しようとする技
術的課題は、光軸方向により小型化することができるズ
ームレンズ鏡胴を提供することである。Therefore, a technical problem to be solved by the present invention is to provide a zoom lens barrel which can be downsized in the optical axis direction.
【０００７】[0007]
【課題を解決するための手段】本発明は、上記技術的課
題を解決するために、以下の構成のズームレンズ鏡胴を
提供する。In order to solve the above technical problems, the present invention provides a zoom lens barrel having the following configuration.
【０００８】ズームレンズ鏡胴は、それぞれ光軸方向に
移動する少なくとも２つの第１及び第２のレンズ群と、
固定筒と、該固定筒に対して光軸方向に進退する中間筒
ユニットと、該中間筒ユニットに対して光軸方向に進退
し、上記第１のレンズ群を保持する前進筒と、上記中間
筒ユニットに対して光軸方向に進退し、上記第２のレン
ズ群を保持する移動筒とを備える。上記中間筒ユニット
は、回転筒と、第１及び第２の直進筒とからなる。上記
回転筒は、光軸中心に回転し、外面と内面にそれぞれ第
１及び第２のカムが形成される。上記第１の直進筒は、
光軸方向に直進し、上記回転筒の外側に配置される。上
記第２の直進筒は、光軸方向に直進し、上記回転筒の内
側に配置される。上記前進筒は、上記回転筒の第１のカ
ムに係合する第１のカムフォロアを有する。上記移動筒
は、上記回転筒の第２のカムに係合する第２のカムフォ
ロアを有する。The zoom lens barrel includes at least two first and second lens groups that move in the optical axis direction, respectively.
A fixed barrel, an intermediate barrel unit that moves forward and backward with respect to the fixed barrel in the optical axis direction, a forward barrel that moves forward and backward with respect to the intermediate barrel unit and holds the first lens group, and the intermediate barrel And a movable barrel that moves back and forth in the optical axis direction with respect to the barrel unit and holds the second lens group. The intermediate cylinder unit includes a rotary cylinder and first and second straight advancing cylinders. The rotary cylinder rotates about the optical axis, and first and second cams are formed on the outer surface and the inner surface, respectively. The first straight advance cylinder is
It goes straight in the optical axis direction and is arranged outside the rotary cylinder. The second straight-moving barrel moves straight in the optical axis direction and is arranged inside the rotating barrel. The forward cylinder has a first cam follower that engages with the first cam of the rotary cylinder. The moving barrel has a second cam follower that engages with the second cam of the rotating barrel.
【０００９】上記構成において、回転筒と第１の直進筒
との相対回転により、前進筒が中間筒ユニットに対して
光軸方向に進退し、回転筒と第２の直進筒との相対回転
により、移動筒が中間筒に対して光軸方向に進退するよ
うにすることができる。In the above construction, the forward rotation of the rotary cylinder and the first rectilinear cylinder advances and retracts in the optical axis direction relative to the intermediate cylinder unit, and the relative rotation of the rotary cylinder and the second rectilinear cylinder. The moving barrel can be moved back and forth with respect to the intermediate barrel in the optical axis direction.
【００１０】上記構成によれば、回転筒の外面と内面
に、それぞれ第１及び第２のカムが形成されているの
で、光軸直角方向から見たときに第１及び第２のカムが
交差しても、第１及び第２のレンズ群を支障なく、光軸
方向に移動することができる。According to the above construction, since the first and second cams are formed on the outer surface and the inner surface of the rotary cylinder, respectively, the first and second cams intersect when viewed from the direction perpendicular to the optical axis. Even in this case, the first and second lens groups can be moved in the optical axis direction without any trouble.
【００１１】したがって、筒の個数を増やすことなく、
光軸方向の寸法を小さくすることができ、ズームレンズ
鏡胴を光軸方向により小型化することができる。Therefore, without increasing the number of cylinders,
The size in the optical axis direction can be reduced, and the zoom lens barrel can be downsized in the optical axis direction.
【００１２】好ましくは、上記第１及び第２の直進筒
は、それぞれ、上記回転筒に、光軸方向一体かつ回転自
在に保持される。上記第１及び第２の直進筒は、それぞ
れ別々に、他の部材により、光軸方向に直進案内され
る。Preferably, the first and second rectilinear barrels are respectively held by the rotary barrel so as to be integrally rotatable in the optical axis direction. The first and second rectilinear barrels are separately guided by the other members in the optical axis direction.
【００１３】上記構成によれば、第１及び第２の直進筒
は、他の部材（例えば、固定筒）により、それぞれ独立
して直進案内されるので、互いに直接係合させる必要は
なく、構成を簡素化することができる。According to the above construction, since the first and second straight-moving barrels are independently guided straight by other members (for example, fixed barrels), it is not necessary to directly engage with each other. Can be simplified.
【００１４】[0014]
【発明の実施の形態】以下、本発明の実施の形態として
一実施例を図１〜図５に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.
【００１５】図１及び図２は、撮影時（繰り出し状態）
のズームレンズ鏡胴１０の断面図であり、図１は広角
端、図２は望遠端である。図３は、非撮影時（沈胴状
態）の断面図である。図４は回転筒２５の展開図、図５
は固定筒２２の展開図である。矢印８０は、被写体側を
示す。1 and 2 are at the time of photographing (extended state)
2 is a sectional view of the zoom lens barrel 10 of FIG. 1, in which FIG. 1 is a wide-angle end and FIG. 2 is a telephoto end. FIG. 3 is a cross-sectional view at the time of non-imaging (collapsed state). 4 is a development view of the rotary cylinder 25, and FIG.
FIG. 4 is a development view of the fixed cylinder 22. The arrow 80 indicates the subject side.
【００１６】図１〜図３に示したように、ズームレンズ
鏡胴１０は、固定筒２２の内側に、中間筒ユニット３０
及び前進筒２６が配置され、長ギヤ１９の回転により、
固定筒２２から中間ユニット３０及び前進筒２６が出没
し、これにより、第１レンズ群１１、第２レンズ群１
２、第３レンズ群１３及び第４レンズ群１４が光軸方向
に移動するようになっている。As shown in FIGS. 1 to 3, the zoom lens barrel 10 includes the intermediate barrel unit 30 inside the fixed barrel 22.
And the forward cylinder 26 is arranged, and by the rotation of the long gear 19,
The intermediate unit 30 and the advancing barrel 26 appear and disappear from the fixed barrel 22, whereby the first lens group 11 and the second lens group 1
The second, third lens group 13 and the fourth lens group 14 move in the optical axis direction.
【００１７】図５の展開図に示すように、固定筒２２の
内周面には、螺旋状のヘリコイド２２ａが形成されてい
る。また、光軸方向に延在する３本のガイド溝２２ｐ，
２２ｑ，２２ｒが形成されている。一つのガイド溝２２
ｑは、他のガイド溝２２ｐ，２２ｒよりも幅が広く、長
ギヤ１９が入り込むようになっている。As shown in the developed view of FIG. 5, a spiral helicoid 22a is formed on the inner peripheral surface of the fixed barrel 22. In addition, the three guide grooves 22p extending in the optical axis direction,
22q and 22r are formed. One guide groove 22
The width q is wider than the other guide grooves 22p and 22r, and the long gear 19 is inserted therein.
【００１８】中間筒ユニット３０は、内直進筒２３、外
直進筒２４及び回転筒２５からなり、光軸方向に一体的
に移動する。The intermediate barrel unit 30 is composed of an inner straight barrel 23, an outer straight barrel 24, and a rotary barrel 25, and moves integrally in the optical axis direction.
【００１９】内直進筒２３は、その後端に、固定筒２２
のガイド溝２２ｐ，２２ｑ，２２ｒに係合する係合片２
３ａが設けられ、回転が規制されながら、光軸方向に案
内されるようになっている。The inner straight-moving barrel 23 has a fixed barrel 22 at its rear end.
Engaging piece 2 that engages with the guide grooves 22p, 22q, 22r of
3a is provided so as to be guided in the optical axis direction while being restricted in rotation.
【００２０】回転筒２５は、固定筒２２と第２の直進筒
２３との間に配置され、第２の直進筒２３と相対回転自
在、かつ軸方向移動不自在に結合している。回転筒２５
の後端側には、固定筒２２のヘリコイド２２ａに係合す
るヘリコイド２５ｄが、全周に設けられている。ヘリコ
イド２５ｄには、長ギヤ１９と噛合する歯車が形成され
ている。The rotary cylinder 25 is arranged between the fixed cylinder 22 and the second straight advance cylinder 23, and is connected to the second straight advance cylinder 23 so as to be rotatable relative to the second straight advance cylinder 23 and immovable in the axial direction. Rotating cylinder 25
On the rear end side, a helicoid 25d that engages with the helicoid 22a of the fixed barrel 22 is provided all around. A gear that meshes with the long gear 19 is formed on the helicoid 25d.
【００２１】図４に示すように、回転筒２５は、その外
周面に第１カム溝２５ａが形成され、その内周面に第２
及び第３カム溝２５ｂ，２５ｃが形成されている。As shown in FIG. 4, the rotary cylinder 25 has a first cam groove 25a formed on its outer peripheral surface and a second cam groove 25a formed on its inner peripheral surface.
And third cam grooves 25b and 25c are formed.
【００２２】外直進筒２４は、固定筒２２と回転筒２５
との間に配置される。外直進筒２４は、その後端に、固
定筒２２のガイド溝２２ｐ，２２ｑ，２２ｒに係合する
係合片２４ａが設けられ、回転が規制されながら、軸方
向に案内されるようになっている。The outer rectilinear barrel 24 is composed of a fixed barrel 22 and a rotary barrel 25.
It is placed between and. The outer rectilinear cylinder 24 is provided at its rear end with an engagement piece 24a that engages with the guide grooves 22p, 22q, 22r of the fixed cylinder 22, and is guided in the axial direction while being restricted in rotation. .
【００２３】前進筒２６は、回転筒２５と外直進筒２４
との間に配置される。前進筒２６の後端側は、外直進筒
２４と係合し、回転が規制され、軸方向に案内されるよ
うになっている。また、前進筒２６の後端側内周面に
は、回転筒２５の第１カム溝２５ａに係合するピン２６
ａが、径方向内向きに突設されている。前進筒２６の前
端側には、レンズバリア２８と第１レンズ群１１とが固
定される。The forward cylinder 26 is composed of a rotary cylinder 25 and an outer rectilinear cylinder 24.
It is placed between and. The rear end side of the forward movement barrel 26 is engaged with the outer straight advancement barrel 24, its rotation is restricted, and it is guided in the axial direction. In addition, a pin 26 that engages with the first cam groove 25 a of the rotary cylinder 25 is provided on the inner peripheral surface on the rear end side of the forward cylinder 26.
a is projected inward in the radial direction. The lens barrier 28 and the first lens group 11 are fixed to the front end side of the advancing barrel 26.
【００２４】第２レンズ群１２は、第１移動筒２０に保
持される。第１移動筒２０には、絞りユニット１７とシ
ャッターユニット１８とが配置されている。第１移動筒
２０は、内直進筒２３と係合し、回転が規制され、軸方
向に案内されるようになっている。第１移動筒２０に
は、径方向外向きにピン２０ａが突設され、回転筒２５
の第２カム溝２５ｂに係合するようになっている。The second lens group 12 is held by the first moving barrel 20. A diaphragm unit 17 and a shutter unit 18 are arranged in the first moving barrel 20. The first moving barrel 20 is engaged with the inner straight-moving barrel 23, its rotation is restricted, and it is guided in the axial direction. A pin 20 a is provided on the first moving barrel 20 so as to project outward in the radial direction.
It engages with the second cam groove 25b.
【００２５】第３レンズ群１３は、第２移動筒２１によ
り、光軸方向移動可能に保持される。第２移動筒２１に
は、第３レンズ群１３を光軸方向に移動するフォーカス
駆動ユニット（不図示）が配置されている。第２移動筒
２１は、内直進筒２３と係合し、回転が規制され、軸方
向に案内されるようになっている。第２移動筒２１に
は、径方向外向きにピン２１ａが突設され、回転筒２５
の第３カム溝２５ｃに係合するようになっている。The third lens group 13 is held by the second moving barrel 21 so as to be movable in the optical axis direction. A focus drive unit (not shown) that moves the third lens group 13 in the optical axis direction is arranged in the second moving barrel 21. The second moving barrel 21 is engaged with the inner straight-moving barrel 23, its rotation is restricted, and it is guided in the axial direction. A pin 21a is provided on the second moving barrel 21 so as to project outward in the radial direction.
It engages with the third cam groove 25c.
【００２６】第４レンズ群１４は、固定筒２２の後端に
固定される。固定筒２２の後端には、ローパスフィルタ
１５とＣＣＤ撮像素子１６とを配置することができる。The fourth lens group 14 is fixed to the rear end of the fixed barrel 22. At the rear end of the fixed barrel 22, the low pass filter 15 and the CCD image pickup device 16 can be arranged.
【００２７】次に、動作について説明する。Next, the operation will be described.
【００２８】ズームレンズ鏡胴１０は、非撮影時には、
図３に示したように、各レンズ群１１，１２，１３，１
４が互いに接近し、全長が最も短い沈胴状態となる。The zoom lens barrel 10 is used when not photographing.
As shown in FIG. 3, each lens group 11, 12, 13, 1
4 come close to each other and are in a collapsed state where the total length is the shortest.
【００２９】この状態から、不図示のズーム駆動アクチ
ュエータにより、長ギヤ１９が回転すると、回転筒２５
が回転する。回転筒２５は、固定筒２２とのヘリコイド
結合により、軸方向に繰り出す。From this state, when the long gear 19 is rotated by a zoom drive actuator (not shown), the rotary cylinder 25
Rotates. The rotary cylinder 25 is extended in the axial direction by the helicoid coupling with the fixed cylinder 22.
【００３０】このとき、図４において矢印９０で示すよ
うに、前進筒２６のピン２６ａは回転筒２５の第１カム
溝２５ａに沿って前方（矢印８０で示す被写体側）へ移
動するので、前進筒２６は回転筒２５から繰り出す。一
方、第１及び第２移動筒２０，２１のピン２０ａ，２１
ａは、図４において矢印９２，９４で示すように、それ
ぞれ回転筒２５の第２及び第３カム溝２５ｂ，２５ｃに
沿って移動するので、第１及び第２移動筒２０，２１
は、回転筒２５に対して後方（ＣＣＤ撮像素子１６側）
へ移動する。At this time, as shown by the arrow 90 in FIG. 4, the pin 26a of the advancing cylinder 26 moves forward (toward the object shown by the arrow 80) along the first cam groove 25a of the rotating cylinder 25. The cylinder 26 is extended from the rotary cylinder 25. On the other hand, the pins 20a, 21 of the first and second moving barrels 20, 21
Since a moves along the second and third cam grooves 25b and 25c of the rotary cylinder 25, as indicated by arrows 92 and 94 in FIG. 4, respectively, the first and second movable cylinders 20 and 21
Is behind the rotary cylinder 25 (on the CCD image pickup device 16 side)
Move to.
【００３１】そして、図１に示すように、ズームレンズ
鏡胴１０が最も繰り出されると、使用可能状態となる。
このとき、ズームレンズ鏡胴１０の焦点距離は最短、す
なわち広角端となる。Then, as shown in FIG. 1, when the zoom lens barrel 10 is extended most, it becomes ready for use.
At this time, the focal length of the zoom lens barrel 10 is the shortest, that is, the wide-angle end.
【００３２】さらに、駆動すると、回転筒２５は、固定
筒２２とのヘリコイド結合により、さらに前方へ繰り出
す。このとき、図４において矢印９１で示すように、前
進筒２６のピン２６ａは回転筒２５の第１カム溝２５ａ
に沿って後方へ移動するので、前進筒２６は回転筒２５
側に繰り込む。一方、第１及び第２移動筒２０，２１の
ピン２０ａ，２１ａは、図４において矢印９３，９５で
示すように、それぞれ回転筒２５の第２及び第３カム溝
２５ｂ，２５ｃに沿って前方へ移動するので、第１及び
第２移動筒２０，２１は、回転筒２５に対して前方へ移
動する。Further, when driven, the rotary cylinder 25 is further extended forward by the helicoid coupling with the fixed cylinder 22. At this time, as indicated by an arrow 91 in FIG. 4, the pin 26 a of the forward movement barrel 26 is connected to the first cam groove 25 a of the rotation barrel 25.
As it moves rearward along the forward cylinder 26,
Fold to the side. On the other hand, the pins 20a and 21a of the first and second moving barrels 20 and 21 move forward along the second and third cam grooves 25b and 25c of the rotary barrel 25, respectively, as shown by arrows 93 and 95 in FIG. Therefore, the first and second moving barrels 20 and 21 move forward with respect to the rotary barrel 25.
【００３３】そして、図２に示すように、駆動された時
ズームレンズ鏡胴１０は焦点距離が最大、すなわち望遠
端となる。As shown in FIG. 2, when driven, the zoom lens barrel 10 has the maximum focal length, that is, the telephoto end.
【００３４】以上説明したように、ズームレンズ鏡胴１
０は、コンパクト化に有利な多段鏡胴である。第１レン
ズ群１１を駆動するための第１カム溝２５ａと、第２及
び第３レンズ群１２，１３を駆動するための第２及び第
３カム溝２５ｂ，２５ｃとは、図４に示したように、光
軸直角方向から見たときに重なるが、各カム溝２５ａ，
２５ｂ及び２５ｃは、回転筒２５の外面と内面とに交差
しないように形成されているので、各々レンズ群専用の
カム筒としなくとも、一つの短い回転筒２４で、各レン
ズ群１１，１２，１３を支障なく、光軸方向に移動する
ことができる。また、直進筒２３，２４も、それぞれ固
定筒２２により独立して直進案内されるため、互いに係
合する必要がなく、構成が簡素化されている。したがっ
て、ズームレンズ鏡胴をより小型化することができる。As described above, the zoom lens barrel 1
Reference numeral 0 is a multi-stage lens barrel that is advantageous for compactness. The first cam groove 25a for driving the first lens group 11 and the second and third cam grooves 25b, 25c for driving the second and third lens groups 12 and 13 are shown in FIG. As seen from the direction perpendicular to the optical axis, the cam grooves 25a,
Since 25b and 25c are formed so as not to intersect the outer surface and the inner surface of the rotary barrel 25, one short rotary barrel 24 can be used for each lens group 11, 12, 13 can be moved in the optical axis direction without any trouble. Further, since the straight-moving cylinders 23 and 24 are also guided straight by the fixed cylinder 22 independently of each other, there is no need to engage with each other, and the structure is simplified. Therefore, the zoom lens barrel can be made smaller.
【００３５】なお、本発明は上記実施形態に限定される
ものではなく、その他種々の態様で実施可能である。The present invention is not limited to the above embodiment, but can be implemented in various other modes.
【００３６】例えば、本発明は、撮影用のズームレンズ
鏡胴に限らず、例えば投影用のズームレンズ鏡胴にも適
用可能である。For example, the present invention can be applied not only to the zoom lens barrel for photographing but also to the zoom lens barrel for projection, for example.
【図１】 本発明の一実施例のズームレンズ鏡胴の断面
図である。広角端を示す。FIG. 1 is a sectional view of a zoom lens barrel according to an embodiment of the present invention. Shows wide-angle end.
【図２】 図１のズームレンズ鏡胴の断面図である。望
遠端を示す。FIG. 2 is a sectional view of the zoom lens barrel of FIG. Shows the telephoto end.
【図３】 図１のズームレンズ鏡胴の断面図である。沈
胴状態を示す。3 is a sectional view of the zoom lens barrel of FIG. Indicates the collapsed state.
【図４】 回転筒の展開図である。FIG. 4 is a development view of a rotary cylinder.
【図５】 固定筒の展開図である。FIG. 5 is a development view of a fixed barrel.
１０ ズームレンズ鏡胴 １１ 第１レンズ群（第１のレンズ群） １２ 第２レンズ群（第２のレンズ群） １３ 第３レンズ群（第２のレンズ群） １４ 第４レンズ群 ２０ 第１移動筒 ２０ａ ピン（第２のカムフォロア） ２１ 第２移動筒 ２１ａ ピン（第２のカムフォロア） ２２ 固定筒 ２３ 内直進筒（第２の直進筒） ２４ 外直進筒（第１の直進筒） ２５ 回転筒 ２５ａ 第１カム溝（第１のカム） ２５ｂ 第２カム溝（第２のカム） ２５ｃ 第３カム溝（第２のカム） ２６ 前進筒 ２６ａ ピン（第１のカムフォロア） ３０ 中間筒ユニット 10 Zoom lens barrel 11 First Lens Group (First Lens Group) 12 Second lens group (second lens group) 13 third lens group (second lens group) 14 4th lens group 20 First moving cylinder 20a pin (second cam follower) 21 Second moving cylinder 21a pin (second cam follower) 22 Fixed tube 23 Inside straight advancing cylinder (second straight advancing cylinder) 24 Outer straight barrel (first straight barrel) 25 rotating cylinder 25a First cam groove (first cam) 25b Second cam groove (second cam) 25c Third cam groove (second cam) 26 Forward cylinder 26a pin (first cam follower) 30 Intermediate tube unit
Claims (2)
２つの第１及び第２のレンズ群と、 固定筒と、 該固定筒に対して光軸方向に進退する中間筒ユニット
と、 該中間筒ユニットに対して光軸方向に進退し、上記第１
のレンズ群を保持する前進筒と、 上記中間筒ユニットに対して光軸方向に進退し、上記第
２のレンズ群を保持する移動筒とを備え、 上記中間筒ユニットは、光軸中心に回転し、外面と内面
にそれぞれ第１及び第２のカムが形成された回転筒と、
光軸方向に直進し、上記回転筒の外側に配置された第１
の直進筒と、光軸方向に直進し、上記回転筒の内側に配
置された第２の直進筒とからなり、 上記前進筒は、上記回転筒の第１のカムに係合する第１
のカムフォロアを有し、 上記移動筒は、上記回転筒の第２のカムに係合する第２
のカムフォロアを有することを特徴とする、ズームレン
ズ鏡胴。1. At least two first and second lens groups that move in the optical axis direction, a fixed barrel, an intermediate barrel unit that advances and retracts in the optical axis direction with respect to the fixed barrel, and the intermediate barrel unit. With respect to the optical axis,
And a moving barrel that moves back and forth in the optical axis direction with respect to the intermediate barrel unit and holds the second lens group, and the intermediate barrel unit rotates about the optical axis. A rotary cylinder having first and second cams formed on the outer surface and the inner surface, respectively,
A first unit which is arranged on the outer side of the above-mentioned rotary cylinder and goes straight in the optical axis direction.
And a second straight-moving barrel that moves straight in the optical axis direction and is arranged inside the rotating barrel. The forward-moving barrel engages the first cam of the rotating barrel.
A cam follower, wherein the movable barrel is a second cam engaged with the second cam of the rotary barrel.
A zoom lens barrel characterized by having a cam follower.
れ、上記回転筒に、光軸方向一体かつ回転自在に保持さ
れ、 上記第１及び第２の直進筒は、それぞれ別々に、他の部
材により、光軸方向に直進案内されることを特徴とす
る、請求項１記載のズームレンズ鏡胴。2. The first and second straight-moving barrels are rotatably held integrally with the rotary barrel in the optical axis direction, respectively, and the first and second straight-moving barrels are separately and separately attached to each other. The zoom lens barrel according to claim 1, wherein the member is linearly guided in the optical axis direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001254577A JP3842087B2 (en) | 2001-08-24 | 2001-08-24 | Zoom lens barrel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001254577A JP3842087B2 (en) | 2001-08-24 | 2001-08-24 | Zoom lens barrel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003066308A true JP2003066308A (en) | 2003-03-05 |
| JP3842087B2 JP3842087B2 (en) | 2006-11-08 |
Family
ID=19082721
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001254577A Expired - Fee Related JP3842087B2 (en) | 2001-08-24 | 2001-08-24 | Zoom lens barrel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3842087B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005234259A (en) * | 2004-02-20 | 2005-09-02 | Chinontec Kk | Optical lens-barrel |
| JP2006201395A (en) * | 2005-01-19 | 2006-08-03 | Canon Inc | Interlocking mechanism for zoom strobe device and zoom finder device, camera and assembly method for zoom strobe device and zoom finder device |
| CN100392466C (en) * | 2004-02-16 | 2008-06-04 | 宾得株式会社 | Cam mechanism of a lens barrel |
| US7746584B2 (en) | 2007-01-30 | 2010-06-29 | Panasonic Corporation | Lens barrel supporting frame, lens retaining structure, lens barrel and camera |
| US8493667B2 (en) | 2007-10-04 | 2013-07-23 | Canon Kabushiki Kaisha | Lens apparatus and imaging apparatus |
| US8508858B2 (en) | 2009-12-15 | 2013-08-13 | Panasonic Corporation | Lens barrel |
| JP2014160242A (en) * | 2013-01-24 | 2014-09-04 | Panasonic Corp | Lens barrel |
| US10495841B2 (en) | 2016-08-03 | 2019-12-03 | Ricoh Imaging Company, Ltd. | Lens barrel and imaging device |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4974833B2 (en) | 2007-10-04 | 2012-07-11 | キヤノン株式会社 | LENS DEVICE AND IMAGING DEVICE |
| JP5328181B2 (en) | 2008-03-11 | 2013-10-30 | キヤノン株式会社 | Lens barrel and photographing apparatus |
| JP5197218B2 (en) * | 2008-08-06 | 2013-05-15 | キヤノン株式会社 | Imaging device |
| JP2011043676A (en) | 2009-08-21 | 2011-03-03 | Fujifilm Corp | Lens barrel and photographing apparatus |
| JP6214379B2 (en) | 2013-12-17 | 2017-10-18 | キヤノン株式会社 | Optical equipment |
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2001
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100392466C (en) * | 2004-02-16 | 2008-06-04 | 宾得株式会社 | Cam mechanism of a lens barrel |
| JP2005234259A (en) * | 2004-02-20 | 2005-09-02 | Chinontec Kk | Optical lens-barrel |
| JP2006201395A (en) * | 2005-01-19 | 2006-08-03 | Canon Inc | Interlocking mechanism for zoom strobe device and zoom finder device, camera and assembly method for zoom strobe device and zoom finder device |
| JP4677238B2 (en) * | 2005-01-19 | 2011-04-27 | キヤノン株式会社 | Camera lens barrel and camera equipped with the same |
| US7746584B2 (en) | 2007-01-30 | 2010-06-29 | Panasonic Corporation | Lens barrel supporting frame, lens retaining structure, lens barrel and camera |
| US7920345B2 (en) | 2007-01-30 | 2011-04-05 | Panasonic Corporation | Lens barrel supporting frame, lens retaining structure, lens barrel and camera |
| US8493667B2 (en) | 2007-10-04 | 2013-07-23 | Canon Kabushiki Kaisha | Lens apparatus and imaging apparatus |
| US8508858B2 (en) | 2009-12-15 | 2013-08-13 | Panasonic Corporation | Lens barrel |
| JP2014160242A (en) * | 2013-01-24 | 2014-09-04 | Panasonic Corp | Lens barrel |
| US9063279B2 (en) | 2013-01-24 | 2015-06-23 | Panasonic Intellectual Property Management Co., Ltd. | Lens barrel |
| US10495841B2 (en) | 2016-08-03 | 2019-12-03 | Ricoh Imaging Company, Ltd. | Lens barrel and imaging device |
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| Publication number | Publication date |
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| JP3842087B2 (en) | 2006-11-08 |
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