JP2007206716A - Lens barrel for camera - Google Patents

Lens barrel for camera Download PDF

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JP2007206716A
JP2007206716A JP2007079362A JP2007079362A JP2007206716A JP 2007206716 A JP2007206716 A JP 2007206716A JP 2007079362 A JP2007079362 A JP 2007079362A JP 2007079362 A JP2007079362 A JP 2007079362A JP 2007206716 A JP2007206716 A JP 2007206716A
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guide shaft
moving frame
lens barrel
barrel
press
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JP4329834B2 (en
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Rie Kato
利恵 加藤
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Sony Corp
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Sony Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a lens barrel for a camera which is easily assembled and disassembled. <P>SOLUTION: The lens barrel for the camera is equipped with a Z-moving frame 121 (or F-moving frame 141) holding a lens; a Z-guide shaft 124 (or F guide shaft 144) supporting the Z-moving frame (or F-moving frame) movably in the optical axis direction of the lens; a lens-driving means for moving the Z-moving frame (or F-moving frame) along the Z-guide shaft (or F-guide shaft); an intermediate lens barrel 131 equipped with a space part having a predetermined area, where the Z-moving frame (F-moving frame) moves inside and having an aperture, and also having a first press-fit hole for fixedly supporting one end of the Z-guide shaft (F guide shaft); and a front lens barrel 111 (or rear lens barrel 151), attached to the intermediate lens barrel so as to cover the aperture of the space part and having a second press-fit hole for fixedly supporting the other end of the Z-guide shaft (or F-guide shaft). The fixed strength on the first press-fit hole side of the Z-guide shaft (or F-guide shaft) is made stronger than that on the second press-fit hole side thereof. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、ビデオカメラ等のカメラ用レンズ鏡筒に関するものである。   The present invention relates to a lens barrel for a camera such as a video camera.

従来より、４群のレンズから成るズームレンズ系及びＣＣＤ等の撮像素子を有するインナーフォーカス方式のカメラ用レンズ鏡筒が知られている。このカメラ用レンズ鏡筒は、前部鏡筒、Ｚ移動枠、中間鏡筒、Ｆ移動枠及び後部鏡筒を備えており、各群のレンズ及び撮像素子は、前部鏡筒、Ｚ移動枠、中間鏡筒、Ｆ移動枠及び後部鏡筒にそれぞれ配設されている。   2. Description of the Related Art Conventionally, an inner focus type camera lens barrel having a zoom lens system including four groups of lenses and an image sensor such as a CCD is known. The camera lens barrel includes a front lens barrel, a Z moving frame, an intermediate lens barrel, an F moving frame, and a rear lens barrel. The lens and the image pickup element of each group include a front lens barrel and a Z moving frame. , The intermediate lens barrel, the F moving frame, and the rear lens barrel.

前部鏡筒、中間鏡筒及び後部鏡筒は、この順で相互に接続固定されている。そして、Ｚ移動枠は、中間鏡筒の内部であって前部鏡筒と中間鏡筒との間で移動可能に配設され、Ｆ移動枠は、中間鏡筒の内部であって後部鏡筒と中間鏡筒との間で移動可能に配設されている。即ち、Ｚ移動枠は、前部鏡筒と中間鏡筒との間に架け渡されているＺガイド軸に係止され、ステッピングモータの駆動によりＺガイド軸に沿って移動制御される。また、Ｆ移動枠も、後部鏡筒と中間鏡筒との間に架け渡されているＦガイド軸に係止され、ステッピングモータの駆動によりＦガイド軸に沿って移動制御される。   The front barrel, the intermediate barrel, and the rear barrel are connected and fixed to each other in this order. The Z moving frame is disposed inside the intermediate lens barrel so as to be movable between the front lens barrel and the intermediate lens barrel, and the F moving frame is disposed inside the intermediate lens barrel and located in the rear lens barrel. And an intermediate lens barrel so as to be movable. In other words, the Z moving frame is locked to the Z guide shaft that is spanned between the front lens barrel and the intermediate lens barrel, and the movement is controlled along the Z guide shaft by driving the stepping motor. Further, the F moving frame is also locked to the F guide shaft spanned between the rear lens barrel and the intermediate lens barrel, and the movement is controlled along the F guide shaft by driving the stepping motor.

このような構成のカメラ用レンズ鏡筒の組立手順は、先ず、Ｚガイド軸の一端を中間鏡筒に設けられているＺガイド軸のＺ軸取付部に圧入すると共に、Ｆガイド軸の一端を中間鏡筒に設けられているＦガイド軸のＦ軸取付部に圧入する。次に、ステッピングモータとＺガイド軸とを連結するための連結ナットをＺ移動枠に係合させ、このＺ移動枠をＺガイド軸の他端から挿入係合させる。そして、Ｚガイド軸の他端を前部鏡筒に設けられているＺガイド軸のＺ軸取付部に圧入し、前部鏡筒と中間鏡筒をネジ止めする。   The assembly procedure of the camera lens barrel having such a configuration is as follows. First, one end of the Z guide shaft is press-fitted into the Z axis mounting portion of the Z guide shaft provided in the intermediate lens barrel, and one end of the F guide shaft is inserted. Press fit into the F-axis mounting portion of the F guide shaft provided in the intermediate lens barrel. Next, a connecting nut for connecting the stepping motor and the Z guide shaft is engaged with the Z moving frame, and the Z moving frame is inserted and engaged from the other end of the Z guide shaft. Then, the other end of the Z guide shaft is press-fitted into the Z-axis mounting portion of the Z guide shaft provided in the front barrel, and the front barrel and the intermediate barrel are screwed together.

さらに、ステッピングモータとＦガイド軸とを連結するための連結ナットをＦ移動枠に係合させ、このＦ移動枠をＦガイド軸の他端から挿入係合させる。そして、Ｆガイド軸の他端を後部鏡筒に設けられているＦガイド軸のＦ軸取付部に圧入し、後部鏡筒と中間鏡筒をネジ止めする。最後に、各ステッピングモータと各連結ナットを係合させて、各ステッピングモータを中間鏡筒にネジ止めし、アイリス等を中間鏡筒にネジ止めする。
特開平４−３１０９０５号公報 特開平３−２２３８０５号公報 Further, a connecting nut for connecting the stepping motor and the F guide shaft is engaged with the F moving frame, and the F moving frame is inserted and engaged from the other end of the F guide shaft. Then, the other end of the F guide shaft is press-fitted into the F axis mounting portion of the F guide shaft provided in the rear barrel, and the rear barrel and the intermediate barrel are screwed. Finally, each stepping motor and each connecting nut are engaged, and each stepping motor is screwed to the intermediate lens barrel, and an iris or the like is screwed to the intermediate lens barrel.
JP-A-4-310905 JP-A-3-223805

上述した従来のカメラ用レンズ鏡筒を修理等により分解する場合、上述した組立手順とは逆手順で行う必要がある。ところが、前部鏡筒と中間鏡筒及び後部鏡筒と中間鏡筒を外したときに、Ｚガイド軸及びＦガイド軸の各一端と中間鏡筒のＺ軸取付部及びＦ軸取付部との圧入度合が、Ｚガイド軸及びＦガイド軸の各他端と前部鏡筒及び後部鏡筒のＺ軸取付部及びＦ軸取付部との圧入度合よりも小さいと、Ｚガイド軸及びＦガイド軸が、前部鏡筒側及び後部鏡筒側にそれぞれ付いた状態で、前部鏡筒及び後部鏡筒が外れる場合がある。   When disassembling the above-described conventional camera lens barrel by repair or the like, it is necessary to carry out the reverse procedure to the above-described assembly procedure. However, when the front lens barrel and the intermediate lens barrel, and the rear lens barrel and the intermediate lens barrel are removed, the one end of each of the Z guide shaft and the F guide shaft and the Z axis mounting portion and the F axis mounting portion of the intermediate lens barrel If the press-fit degree is smaller than the press-fit degree between the other ends of the Z guide shaft and the F guide shaft and the Z axis mounting portion and the F shaft mounting portion of the front barrel and the rear barrel, the Z guide shaft and the F guide shaft However, the front lens barrel and the rear lens barrel may come off in a state where they are attached to the front lens barrel side and the rear lens barrel side, respectively.

このような場合、Ｚ移動枠及びＦ移動枠は、中間鏡筒の内部に取り残されることになり、Ｚ移動枠及びＦ移動枠を中間鏡筒の内部から取出すときに、Ｚ移動枠及びＦ移動枠が中間鏡筒の内壁と干渉して他の部材に損傷を与えるおそれがあった。さらに、再組立時にＺガイド軸及びＦガイド軸を前部鏡筒及び後部鏡筒のＺ軸取付部及びＦ軸取付部から一旦引き抜いて、中間鏡筒のＺ軸取付部及びＦ軸取付部に圧入しなければならず、組立工数が掛るという問題があった。また、Ｚガイド軸及びＦガイド軸がＺ移動枠及びＦ移動枠と共に、前部鏡筒側及び後部鏡筒側にそれぞれ付いた状態で、前部鏡筒及び後部鏡筒が外れた場合は、上記損傷の問題は回避されるが、上記組立工数の問題は依然残ることになる。   In such a case, the Z moving frame and the F moving frame are left behind inside the intermediate lens barrel, and the Z moving frame and the F moving frame are removed when the Z moving frame and the F moving frame are taken out from the inside of the intermediate lens barrel. There is a possibility that the frame interferes with the inner wall of the intermediate lens barrel and damages other members. Further, when reassembling, the Z guide shaft and the F guide shaft are once pulled out from the Z axis mounting portion and the F axis mounting portion of the front lens barrel and the rear lens barrel, and are then moved to the Z axis mounting portion and the F axis mounting portion of the intermediate lens barrel. There was a problem that assembly work was required because it had to be press-fitted. Also, when the front and rear lens barrels are detached with the Z guide shaft and the F guide shaft attached to the front lens barrel side and the rear lens barrel side together with the Z moving frame and the F moving frame, While the damage problem is avoided, the assembly man-hour problem remains.

本発明は、上述した事情から成されたものであり、分解・組立が容易なカメラ用レンズ鏡筒を提供することを目的とする。   The present invention has been made under the circumstances described above, and an object thereof is to provide a camera lens barrel that can be easily disassembled and assembled.

上記目的は、本発明にあっては、レンズを保持した移動枠と、前記移動枠を前記レンズの光軸方向へ移動可能に支持するガイド軸と、前記移動枠を前記ガイド軸に沿って移動させるレンズ駆動手段と、前記移動枠が移動するための所定の領域を内部に有する空間部であって、開口を有する空間部を具えると共に、前記ガイド軸の一端を固定支持する第１の圧入穴を有する第１の鏡筒構成部と、前記空間部の前記開口を閉じるように前記第１の鏡筒構成部に装着されると共に、前記ガイド軸の他端を固定支持する第２の圧入穴を有する第２の鏡筒構成部と、を備え、前記ガイド軸の前記第１の圧入穴側の固定強さを前記第２の圧入穴側の固定強さよりも強くしたことにより達成される。   In the present invention, the object is to provide a moving frame that holds a lens, a guide shaft that supports the moving frame so as to be movable in the optical axis direction of the lens, and moves the moving frame along the guide axis. And a first press-fitting for fixing and supporting one end of the guide shaft, and a space portion having a predetermined region for moving the moving frame therein, and having a space portion having an opening. A first lens barrel component having a hole; and a second press-fit for fixing and supporting the other end of the guide shaft while being attached to the first lens barrel component so as to close the opening of the space. And a second lens barrel component having a hole, and the fixing strength of the guide shaft on the first press-fitting hole side is made stronger than the fixing strength on the second press-fitting hole side. .

上記構成によれば、前部鏡筒や後部鏡筒の第２の鏡筒構成部を中間鏡筒の第１の鏡筒構成部から外したときに、各ガイド軸が中間鏡筒側に残るように構成しているので、各移動枠を中間鏡筒の空間部の内部から取出すときに、各移動枠が中間鏡筒の内壁と干渉するようなことはなく、他の部材に損傷を与えることを防止することができる。さらに、再組立時に各ガイド軸を中間鏡筒の各取付部の圧入穴に圧入する必要もないので、組立工数を低減することができる。   According to the above configuration, each guide shaft remains on the intermediate lens barrel side when the second lens barrel component of the front lens barrel and the rear lens barrel is removed from the first lens barrel component of the intermediate lens barrel. Since each moving frame is taken out from the space part of the intermediate lens barrel, each moving frame does not interfere with the inner wall of the intermediate lens barrel and damages other members. This can be prevented. Furthermore, since it is not necessary to press-fit each guide shaft into the press-fitting hole of each mounting portion of the intermediate lens barrel at the time of reassembly, the number of assembling steps can be reduced.

以下、本発明の好適な実施形態を添付図面に基づいて詳細に説明する。なお、以下に述べる実施形態は、本発明の好適な具体例であるから、技術的に好ましい種々の限定が付されているが、本発明の範囲は、以下の説明において、特に本発明を限定する旨の記載がない限り、これらの形態に限られるものではない。   DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. The embodiments described below are preferable specific examples of the present invention, and thus various technically preferable limitations are given. However, the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these forms.

図１は、本発明のカメラ用レンズ鏡筒の実施形態を示す分解斜視図、図２は、その断面側面図である。このカメラ用レンズ鏡筒１００は、４群のレンズから成るズームレンズ系を有するインナーフォーカス方式のカメラ用レンズ鏡筒であり、光軸Ｉに沿って被写体側より順に正、負、正、正の屈折力の第１群レンズ１１０、第２群レンズ１２０、第３群レンズ１３０、第４群レンズ１４０が配設されており、第４群レンズ１４０の焦点位置に図示しないＣＣＤ等の撮像素子が配置される。   FIG. 1 is an exploded perspective view showing an embodiment of a camera lens barrel of the present invention, and FIG. 2 is a sectional side view thereof. This camera lens barrel 100 is an inner focus type camera lens barrel having a zoom lens system composed of four groups of lenses, and is positive, negative, positive, positive in order from the subject side along the optical axis I. A first lens group 110 having a refractive power, a second lens group 120, a third lens group 130, and a fourth lens group 140 are disposed. An imaging device such as a CCD (not shown) is provided at the focal position of the fourth lens group 140. Be placed.

第１群レンズ１１０は、鏡筒内に固定されて被写体の像を合焦する合焦用レンズ群であり、図示の場合は３枚のレンズで構成されている。第２群レンズ１２０は、鏡筒内で光軸Ｉに沿って像面側に移動してワイド端からテレ端への変倍を行うズーム（変倍）用レンズ群であり、図示の場合は３枚のレンズで構成されている。第３群レンズ１３０は、鏡筒内に固定されて変倍に伴う像面変動を補正する補正用レンズ群であり、図示の場合は１枚のレンズで構成されている。第４群レンズ１４０は、鏡筒内で光軸Ｉに沿って移動してピント合わせ（フォーカシング）を行うフォーカス用レンズ群であり、図示の場合は２枚のレンズで構成されている。   The first group lens 110 is a focusing lens group that is fixed in the lens barrel and focuses an image of a subject. In the illustrated case, the first group lens 110 includes three lenses. The second lens group 120 is a zoom (magnification) lens group that moves toward the image plane along the optical axis I in the lens barrel and performs magnification from the wide end to the tele end. It consists of three lenses. The third group lens 130 is a correction lens group that is fixed in the lens barrel and corrects image plane fluctuations caused by zooming. In the illustrated case, the third group lens 130 is composed of a single lens. The fourth group lens 140 is a focusing lens group that moves along the optical axis I in the lens barrel and performs focusing (focusing). In the illustrated case, the fourth group lens 140 includes two lenses.

このカメラ用レンズ鏡筒１００は、第２の鏡筒構成部の第１の例を示す前部鏡筒１１１、移動枠の第１の例を示すＺ移動枠１２１、第１の鏡筒構成部である中間鏡筒１３１、移動枠の第２の例を示すＦ移動枠１４１及び第２の鏡筒構成部の第２の例を示す後部鏡筒１５１を備えている。前部鏡筒１１１には、第１群レンズ１１０がカシメ等により固定支持されており、この前部鏡筒１１１は、タッピンビス１１２により中間鏡筒１３１の一端面に固定されている。後部鏡筒１５１には、撮像素子を取り付けるための素子取付部１５２が設けられており、タッピンビス１５３により中間鏡筒１３１の他端面に固定されている。   The camera lens barrel 100 includes a front barrel 111 that shows a first example of the second barrel constituent part, a Z moving frame 121 that shows a first example of the moving frame, and a first barrel constituent part. An intermediate barrel 131, an F moving frame 141 showing a second example of the moving frame, and a rear barrel 151 showing a second example of the second barrel constituting part. A first lens group 110 is fixedly supported on the front lens barrel 111 by caulking or the like, and the front lens barrel 111 is fixed to one end surface of the intermediate lens barrel 131 by a tapping screw 112. The rear barrel 151 is provided with an element attachment portion 152 for attaching an imaging element, and is fixed to the other end surface of the intermediate barrel 131 by a tapping screw 153.

Ｚ移動枠１２１には、第２群レンズ１２０がカシメ等により固定支持されており、このＺ移動枠１２１は、中間鏡筒１３１の一端面側に設けた第１の空間部１３１Ａの内部に移動可能に収納されている。Ｆ移動枠１４１には、第４群レンズ１４０がカシメ等により固定支持されており、このＦ移動枠１４１は、中間鏡筒１３１の他端面側に設けた第２の空間部１３１Ｂの内部に移動可能に収納されている。   The second moving lens 120 is fixedly supported on the Z moving frame 121 by caulking or the like, and this Z moving frame 121 moves inside the first space 131A provided on one end surface side of the intermediate lens barrel 131. It is stored as possible. The F group frame 140 is fixedly supported on the F moving frame 141 by caulking or the like, and the F moving frame 141 moves inside the second space 131B provided on the other end surface side of the intermediate lens barrel 131. It is stored as possible.

即ち、Ｚ移動枠１２１は、前部鏡筒１１１と中間鏡筒１３１にそれぞれ設けられている図３に示すＺ軸取付部１１３、１３３間に平行に架け渡されているガイド軸の第１の例を示す２本のＺガイド軸（第１案内軸）１２４に係止され、第１の例のレンズ駆動手段のステッピングモータ１２２の駆動により連結ナット１２３を介してＺガイド軸１２４に沿って移動制御可能に構成されている。また、Ｆ移動枠１４１も、後部鏡筒１５１と中間鏡筒１３１にそれぞれ設けられている図３に示すＦ軸取付部１５４、１３４間に平行に架け渡されているガイド軸の第２の例を示す２本のＦガイド軸（第２案内軸）１４４に係止され、第２の例のレンズ駆動手段のステッピングモータ１４２の駆動により連結ナット１４３を介してＦガイド軸１４４に沿って移動制御可能に構成されている。   That is, the Z moving frame 121 is a first guide shaft that extends in parallel between the Z axis mounting portions 113 and 133 shown in FIG. 3 provided in the front barrel 111 and the intermediate barrel 131, respectively. Locked by two example Z guide shafts (first guide shafts) 124 and moved along the Z guide shaft 124 via the connecting nut 123 by driving the stepping motor 122 of the lens driving means of the first example. It is configured to be controllable. Further, the F moving frame 141 is also a second example of the guide shaft that is provided in parallel between the F axis attaching portions 154 and 134 shown in FIG. 3 provided in the rear barrel 151 and the intermediate barrel 131, respectively. And is controlled by the driving of the stepping motor 142 of the lens driving means of the second example along the F guide shaft 144 via the connecting nut 143. It is configured to be possible.

ここで、Ｚガイド軸１２４の両端は、前部鏡筒１１１のＺ軸取付部１１３に設けた第２の圧入穴１１３ａと中間鏡筒１３１のＺ軸取付部１３３に設けた第１の圧入穴１３３ａにそれぞれ圧入されており、Ｆガイド軸１４４の両端も、後部鏡筒１５１のＦ軸取付部１５４に設けた第２の圧入穴１５４ａと中間鏡筒１３１のＦ軸取付部１３４に設けた第１の圧入穴１３４ａにそれぞれ圧入されているが、本発明の特徴的な構成は、Ｚガイド軸１２４の一端と中間鏡筒１３１のＺ軸取付部１３３の第１の圧入穴１３３ａとの圧入度合が、Ｚガイド軸１２４の他端と前部鏡筒１１１のＺ軸取付部１１３の第２の圧入穴１１３ａとの圧入度合より大きくなるように構成されていると共に、Ｆガイド軸１４４の一端と中間鏡筒１３１のＦ軸取付部１３４の第１の圧入穴１３４ａとの圧入度合が、Ｆガイド軸１４４の他端と後部鏡筒１５１のＦ軸取付部１５４の第２の圧入穴１５４ａとの圧入度合より大きくなるように構成されている。   Here, both ends of the Z guide shaft 124 are provided with a second press-fitting hole 113 a provided in the Z-axis mounting part 113 of the front barrel 111 and a first press-fitting hole provided in the Z-axis mounting part 133 of the intermediate barrel 131. Each of the F guide shafts 144 is also press-fitted into the second press-fitting hole 154a provided in the F-axis mounting portion 154 of the rear barrel 151 and the F-axis mounting portion 134 provided in the F-axis mounting portion 134 of the intermediate barrel 131. Each of the press-fit holes 134a is press-fitted, but the characteristic configuration of the present invention is that the degree of press-fit between one end of the Z guide shaft 124 and the first press-fit hole 133a of the Z-axis mounting portion 133 of the intermediate barrel 131 is as follows. Is configured to be larger than the press-fit degree between the other end of the Z guide shaft 124 and the second press-fit hole 113a of the Z-axis mounting portion 113 of the front barrel 111, and one end of the F guide shaft 144, Of the F-axis mounting portion 134 of the intermediate barrel 131 Press-fitting degree of the first press-fitting hole 134a is configured to be larger than the press-fitting degree of the second press-fitting hole 154a of the F shaft attachment portion 154 of the other end and the rear barrel 151 of the F guide shaft 144.

即ち、例えばＺガイド軸１２４の一端と中間鏡筒１３１のＺ軸取付部１３３の第１の圧入穴１３３ａとの圧入度合がしまりばめであって、Ｚガイド軸１２４の他端と前部鏡筒１１１のＺ軸取付部１１３の第２の圧入穴１１３ａとの圧入度合が中間ばめとなるように構成され、Ｆガイド軸１４４の一端と中間鏡筒１３１のＦ軸取付部１３４の第１の圧入穴１３４ａとの圧入度合がしまりばめであって、Ｆガイド軸１４４の他端と後部鏡筒１５１のＦ軸取付部１５４の第２の圧入穴１５４ａとの圧入度合が中間ばめとなるように構成されている。   That is, for example, the degree of press-fitting between one end of the Z guide shaft 124 and the first press-fitting hole 133a of the Z-axis mounting portion 133 of the intermediate barrel 131 is an interference fit, and the other end of the Z guide shaft 124 and the front barrel 111 is configured such that the degree of press-fitting with the second press-fitting hole 113 a of the Z-axis attachment portion 113 of the Z-axis is an intermediate fit, and one end of the F guide shaft 144 and the first of the F-axis attachment portion 134 of the intermediate barrel 131. The press-fit degree with the press-fit hole 134a is an interference fit, and the press-fit degree between the other end of the F guide shaft 144 and the second press-fit hole 154a of the F-axis mounting portion 154 of the rear barrel 151 is an intermediate fit. It is configured.

中間鏡筒１３１には、略中央部に第３群レンズ１３０がカシメ等により固定支持されていると共に、側面にＺ移動枠１２１及びＦ移動枠１４１を移動させるレンズ駆動手段のステッピングモータ１２２、１４２を取り付けるためのモータ取付部１３２ａ、１３２ｂと、アイリス１６０を取り付けるためのアイリス取付部１３２ｃが設けられている。ステッピングモータ１２２、１４２は、モータ取付部１３２ａ、１３２ｂに挿入されてタッピンビス１２５、１４５により固定されている。アイリス１６０は、光軸Ｉと交差するようにアイリス取付部１３２ｃから挿入されてタッピンビス１６１により固定されている。   A third lens group 130 is fixedly supported by caulking or the like on the intermediate barrel 131 by caulking or the like, and stepping motors 122 and 142 as lens driving means for moving the Z moving frame 121 and the F moving frame 141 on the side surfaces. Motor mounting portions 132a and 132b for mounting the iris and an iris mounting portion 132c for mounting the iris 160 are provided. The stepping motors 122 and 142 are inserted into the motor mounting portions 132a and 132b and fixed by tapping screws 125 and 145. The iris 160 is inserted from the iris mounting portion 132 c so as to intersect the optical axis I, and is fixed by a tapping screw 161.

図４は、Ｚ移動枠１２１とステッピングモータ１２２の連結状態を説明するためのＺ移動枠１２１及び連結ナット１２３の詳細を示す分解斜視図である。このＺ移動枠１２１は、第２群レンズ１２０がはめ込まれるレンズ枠１２１ａの一端に、光軸Ｉ方向に延びるスリーブ部１２１ｂが一体的に設けられ、このスリーブ部１２１ｂから略１８０°隔てたレンズ枠１２１ａの一端に、Ｕ溝部１２１ｃが設けられている。スリーブ部１２１ｂには、Ｚ移動枠１２１とステッピングモータ１２２とを連結するための連結ナット１２３が挿入される溝部１２１ｄが形成されており、さらに溝部１２１ｄの光軸Ｉ方向の両端には、Ｚガイド軸１２４が挿入される一対の軸受部１２１ｅが形成され、溝部１２１ｄの中央には、連結ナット１２３が嵌合されるナット嵌合部１２１ｆが形成されている。   FIG. 4 is an exploded perspective view showing details of the Z moving frame 121 and the connecting nut 123 for explaining the connecting state of the Z moving frame 121 and the stepping motor 122. In the Z moving frame 121, a lens frame 121a extending in the direction of the optical axis I is integrally provided at one end of a lens frame 121a in which the second group lens 120 is fitted, and the lens frame is separated by approximately 180 ° from the sleeve portion 121b. A U groove 121c is provided at one end of 121a. The sleeve portion 121b is formed with a groove portion 121d into which a connecting nut 123 for connecting the Z moving frame 121 and the stepping motor 122 is inserted, and at both ends of the groove portion 121d in the optical axis I direction, a Z guide. A pair of bearing portions 121e into which the shaft 124 is inserted is formed, and a nut fitting portion 121f into which the connecting nut 123 is fitted is formed at the center of the groove portion 121d.

連結ナット１２３は、溝部１２１ｄ内に収納されてＺガイド軸１２４が挿入されるパイプ部１２３ａと、その側面に一体的に形成され、ナット嵌合部１２１ｆに嵌合される突起部１２３ｂ及び図５に示すステッピングモータ１２２のリードスクリュー１２２ａとかみ合って支持するラック部１２３ｃ、ストッパ部１２３ｄ、クランプバネ部１２３ｅを備えている。尚、以上の構成は、Ｆ移動枠１４１及び連結ナット１４３も同一である。   The connecting nut 123 is housed in the groove 121d and inserted into the pipe portion 123a into which the Z guide shaft 124 is inserted. The connecting nut 123 is integrally formed on the side surface thereof, and the protruding portion 123b fitted into the nut fitting portion 121f and FIG. The rack part 123c which meshes | engages and supports the lead screw 122a of the stepping motor 122 shown in FIG. 1, the stopper part 123d, and the clamp spring part 123e are provided. In the above configuration, the F moving frame 141 and the connecting nut 143 are the same.

このような構成のカメラ用レンズ鏡筒１００の組立手順は、先ず、２本のＺガイド軸１２４の一端を中間鏡筒１３１に設けられているＺ軸取付部１３３の第１の圧入穴１３３ａに圧入すると共に、２本のＦガイド軸１４４の一端を中間鏡筒１３１に設けられているＦ軸取付部１３４の第１の圧入穴１３４ａに圧入する。次に、連結ナット１２３をＺ移動枠１２１に係合させる。即ち、連結ナット１２３のパイプ部１２３ａをＺ移動枠１２１の溝部１２１ｄ内に挿入し、連結ナット１２３の突起部１２３ｂをＺ移動枠１２１のナット嵌合部１２１ｆに嵌合する。   The assembly procedure of the camera lens barrel 100 having such a configuration is as follows. First, one end of the two Z guide shafts 124 is inserted into the first press-fitting hole 133a of the Z-axis mounting portion 133 provided in the intermediate barrel 131. While press-fitting, one end of the two F guide shafts 144 is press-fitted into the first press-fitting hole 134 a of the F-axis mounting portion 134 provided in the intermediate barrel 131. Next, the connecting nut 123 is engaged with the Z moving frame 121. That is, the pipe portion 123 a of the connecting nut 123 is inserted into the groove portion 121 d of the Z moving frame 121, and the protruding portion 123 b of the connecting nut 123 is fitted to the nut fitting portion 121 f of the Z moving frame 121.

このＺ移動枠１２１の軸受部１２１ｅ内及び連結ナット１２３のパイプ部１２３ａ内に一方のＺガイド軸１２４の他端を挿入・貫通させると共に、Ｚ移動枠１２１のＵ溝部１２１ｃ内に他方のＺガイド軸１２４の他端を挿入・貫通させ、Ｚ移動枠１２１を中間鏡筒１３１の一端面側の第１の空間部１３１Ａの内部に収納する。そして、各Ｚガイド軸１２４の他端を前部鏡筒１１１に設けられているＺ軸取付部１１３の第２の圧入穴１１３ａに圧入し、前部鏡筒１１１と中間鏡筒１３１をタッピンビス１１２によりネジ止めする。これにより、Ｚ移動枠１２１は、中間鏡筒１３１の一端面側の第１の空間部１３１Ａの内部にて、各Ｚガイド軸１２４をガイドにして光軸Ｉ方向に移動可能となる。   The other end of one Z guide shaft 124 is inserted and penetrated into the bearing portion 121e of the Z moving frame 121 and the pipe portion 123a of the connecting nut 123, and the other Z guide is inserted into the U groove portion 121c of the Z moving frame 121. The other end of the shaft 124 is inserted and penetrated, and the Z moving frame 121 is accommodated in the first space 131 </ b> A on the one end surface side of the intermediate barrel 131. Then, the other end of each Z guide shaft 124 is press-fitted into a second press-fitting hole 113 a of the Z-axis mounting portion 113 provided in the front barrel 111, and the front barrel 111 and the intermediate barrel 131 are tapped by screws 112. Secure with screws. As a result, the Z moving frame 121 can move in the direction of the optical axis I with the Z guide shafts 124 as guides in the first space 131A on the one end surface side of the intermediate barrel 131.

同様に、連結ナット１４３をＦ移動枠１４１に係合させ、このＦ移動枠１４１にＦガイド軸１４４の他端を挿入・貫通させ、Ｆ移動枠１４１を中間鏡筒１３１の他端面側の第２の空間部１３１Ｂの内部に収納する。そして、各Ｆガイド軸１４４の他端を後部鏡筒１５１に設けられているＦ軸取付部１５４の第２の圧入穴１５４ａに圧入し、後部鏡筒１５１と中間鏡筒１３１をタッピンビス１５３によりネジ止めする。これにより、Ｆガイド軸１４４は、中間鏡筒１３１の他端面側の第２の空間部１３１Ｂの内部にて、各Ｆガイド軸１４４をガイドにして光軸Ｉ方向に移動可能となる。   Similarly, the connecting nut 143 is engaged with the F moving frame 141, the other end of the F guide shaft 144 is inserted and penetrated into the F moving frame 141, and the F moving frame 141 is inserted into the second end surface side of the intermediate barrel 131. 2 is housed in the space 131B. Then, the other end of each F guide shaft 144 is press-fitted into the second press-fitting hole 154 a of the F-axis mounting portion 154 provided in the rear barrel 151, and the rear barrel 151 and the intermediate barrel 131 are screwed with the tapping screws 153. Stop. As a result, the F guide shaft 144 can move in the optical axis I direction with the F guide shafts 144 as guides in the second space 131B on the other end surface side of the intermediate barrel 131.

次に、ステッピングモータ１２２を中間鏡筒１３１のモータ取付部１３２ａに収納して、ステッピングモータ１２２のリードスクリュー１２２ａを連結ナット１２３のラック部１２３ｃとストッパ部１２３ｄ及びクランプバネ部１２３ｅとの間に形成される溝内にはめ込み、ステッピングモータ１２２をタッピンビス１２５により中間鏡筒１３１にネジ止めする。これにより、ステッピングモータ１２２のリードスクリュー１２２ａは、連結ナット１２３のクランプバネ部１２３ｅにより付勢されてラック部１２３ｃとかみ合うことになる。   Next, the stepping motor 122 is housed in the motor mounting portion 132a of the intermediate barrel 131, and the lead screw 122a of the stepping motor 122 is formed between the rack portion 123c of the connecting nut 123, the stopper portion 123d, and the clamp spring portion 123e. The stepping motor 122 is screwed to the intermediate lens barrel 131 with a tapping screw 125. Thereby, the lead screw 122a of the stepping motor 122 is urged by the clamp spring portion 123e of the connecting nut 123 and meshes with the rack portion 123c.

同様に、ステッピングモータ１４２も中間鏡筒１３１のモータ取付部１３２ｂに収納してタッピンビス１４５により中間鏡筒１３１にネジ止めする。これにより、ステッピングモータ１４２のリードスクリュー１４２ａも、連結ナット１４３のラック部１４３ｃとかみ合うことになる。そして、アイリス１６０を光軸Ｉと交差するように中間鏡筒１３１のアイリス取付部１３２ｃから挿入してタッピンビス１６１により中間鏡筒１３１にネジ止めする。   Similarly, the stepping motor 142 is also housed in the motor mounting portion 132b of the intermediate barrel 131 and is screwed to the intermediate barrel 131 with a tapping screw 145. As a result, the lead screw 142 a of the stepping motor 142 is also engaged with the rack portion 143 c of the connection nut 143. Then, the iris 160 is inserted from the iris mounting portion 132 c of the intermediate barrel 131 so as to intersect the optical axis I, and is screwed to the intermediate barrel 131 with a tapping screw 161.

以上のようにして組立てられたカメラ用レンズ鏡筒１００の図５に示す各ステッピングモータ１２２、１４２の端子部１２２ｂ、１４２ｂに図示しない駆動回路から駆動電流が通電されると、各ステッピングモータ１２２、１４２のリードスクリュー１２２ａ、１２２ａが回転する。この回転運動は、連結ナット１２３、１４３のラック部１２３ｃ、１４３ｃで直線運動に変換されてＺ移動枠１２１、Ｆ移動枠１４１に伝達される。従って、Ｚ移動枠１２１及びＦ移動枠１４１は、中間鏡筒１３１の一端面側の第１の空間部１３１Ａの内部及び他端面側の第２の空間部１３１Ｂの内部にて、Ｚガイド軸１２４及びＦガイド軸１４４に沿って光軸Ｉ方向に移動する。   When a drive current is supplied from a drive circuit (not shown) to the terminal portions 122b and 142b of the stepping motors 122 and 142 shown in FIG. 5 of the camera lens barrel 100 assembled as described above, the stepping motors 122 and 142 lead screws 122a and 122a rotate. This rotational motion is converted into a linear motion by the rack portions 123c and 143c of the connecting nuts 123 and 143 and transmitted to the Z moving frame 121 and the F moving frame 141. Therefore, the Z moving frame 121 and the F moving frame 141 are arranged inside the first space 131A on the one end surface side of the intermediate barrel 131 and inside the second space 131B on the other end surface side. And moves along the F guide axis 144 in the direction of the optical axis I.

そして、カメラ用レンズ鏡筒１００を修理等により分解する場合、前部鏡筒１１１と中間鏡筒１３１及び後部鏡筒１５１と中間鏡筒１３１を外したときに、Ｚガイド軸１２４及びＦガイド軸１４４の各一端と中間鏡筒１３１のＺ軸取付部１３３の第１の圧入穴１３３ａ及びＦ軸取付部１３４の第１の圧入穴１３４ａとの圧入度合が、Ｚガイド軸１２４及びＦガイド軸１４４の各他端と前部鏡筒１１１及び後部鏡筒１５１のＺ軸取付部１１３の第２の圧入穴１１３ａ及びＦ軸取付部１５４の第２の圧入穴１５４ａとの圧入度合よりも大きいので、Ｚガイド軸１２４及びＦガイド軸１４４はＺ移動枠１２１及びＦ移動枠１４１と共に、常に中間鏡筒１３１側にそれぞれ付いた状態で、前部鏡筒１１１及び後部鏡筒１５１が外れることになる。   When the camera lens barrel 100 is disassembled for repair or the like, the Z guide shaft 124 and the F guide shaft are removed when the front barrel 111 and the intermediate barrel 131 and the rear barrel 151 and the intermediate barrel 131 are removed. The degree of press-fitting between each end of 144 and the first press-fitting hole 133a of the Z-axis mounting part 133 of the intermediate barrel 131 and the first press-fitting hole 134a of the F-axis mounting part 134 is determined by the Z guide shaft 124 and the F guide shaft 144. Is larger than the press-fitting degree of each other end of the second press-fitting hole 113a of the Z-axis mounting portion 113 of the front barrel 111 and the rear barrel 151 and the second press-fitting hole 154a of the F-axis mounting portion 154. With the Z guide shaft 124 and the F guide shaft 144 always attached to the intermediate barrel 131 side together with the Z moving frame 121 and the F moving frame 141, the front barrel 111 and the rear barrel 151 are detached.

従って、上述した組立手順とは逆手順で行うことができるので、Ｚ移動枠１２１及びＦ移動枠１４１を中間鏡筒１３１の第１の空間部１３１Ａの内部及び第２の空間部１３１Ｂの内部から取出すときに、Ｚ移動枠１２１及びＦ移動枠１４１が中間鏡筒１３１の内壁と干渉するようなことはなく、他の部材に損傷を与えることを防止することができる。さらに、再組立時にＺガイド軸１２４及びＦガイド軸１４４を前部鏡筒１１１及び後部鏡筒１５１のＺ軸取付部１１３及びＦ軸取付部１５４から一旦引き抜く必要もなくなるので、組立工数を大幅に低減させることができる。   Therefore, the Z moving frame 121 and the F moving frame 141 can be moved from the inside of the first space portion 131A and the inside of the second space portion 131B of the intermediate lens barrel 131, since it can be performed in the reverse order to the above assembling procedure. When taking out, the Z moving frame 121 and the F moving frame 141 do not interfere with the inner wall of the intermediate barrel 131, and damage to other members can be prevented. Furthermore, it is not necessary to pull out the Z guide shaft 124 and the F guide shaft 144 from the Z-axis mounting portion 113 and the F-axis mounting portion 154 of the front lens barrel 111 and the rear lens barrel 151 at the time of reassembly. Can be reduced.

以上のように、本発明によれば、分解・組立が容易となり、分解時における部品損傷や組立工数を低減してコストダウンを図ることが可能となる。   As described above, according to the present invention, disassembly and assembly are facilitated, and it is possible to reduce costs by reducing component damage and assembly man-hours during disassembly.

本発明のカメラ用レンズ鏡筒の実施形態を示す分解斜視図。1 is an exploded perspective view showing an embodiment of a camera lens barrel of the present invention. 図１のカメラ用レンズ鏡筒の断面側面図。FIG. 2 is a cross-sectional side view of the camera lens barrel of FIG. 1. 図１のカメラ用レンズ鏡筒の特徴的な部分を示す一部断面側面図。The partial cross section side view which shows the characteristic part of the lens-barrel for cameras of FIG. 図１のカメラ用レンズ鏡筒の移動枠の詳細を示す斜視図。The perspective view which shows the detail of the moving frame of the lens barrel for cameras of FIG. 図４のカメラ用レンズ鏡筒の移動枠に取り付けられるモータを示す斜視図。The perspective view which shows the motor attached to the moving frame of the lens barrel for cameras of FIG.

符号の説明Explanation of symbols

１００‥カメラ用レンズ鏡筒、 １１０‥第１群レンズ、 １１１‥前部鏡筒（第２の鏡筒構成部）、 １１３，１３３‥Ｚ軸取付部、 １１３ａ，１５４ａ‥第２の圧入穴、 １２０‥第２群レンズ、 １２１‥Ｚ移動枠（移動枠）、 １２２，１４５‥ステッピングモータ、 １２３，１４３‥連結ナット、 １２４‥Ｚガイド軸（ガイド軸）、 １３０‥第３群レンズ、 １３１‥中間鏡筒（第１の鏡筒構成部）、 １３１Ａ、１３１Ｂ‥空間部、 １３３ａ，１３４ａ‥第１の圧入穴、 １３４，１５４‥Ｆ軸取付部、 １４０‥第４群レンズ、 １４１‥Ｆ移動枠（移動枠）、 １４４‥Ｆガイド軸（ガイド軸）、 １５１‥後部鏡筒（第２の鏡筒構成部）、 １５２‥素子取付部、 １６０‥アイリス   DESCRIPTION OF SYMBOLS 100 ... Camera lens barrel, 110 ... 1st group lens, 111 ... Front lens barrel (2nd lens barrel structure part), 113,133 ... Z-axis attachment part, 113a, 154a ... 2nd press-fit hole, 120, second group lens, 121, Z moving frame (moving frame), 122, 145, stepping motor, 123, 143, connecting nut, 124, Z guide shaft (guide shaft), 130, third group lens, 131, etc. Intermediate lens barrel (first lens barrel component), 131A, 131B, space, 133a, 134a, first press-fitting hole, 134, 154, F-axis mounting portion, 140, fourth lens group, 141, F movement Frame (moving frame), 144... F guide shaft (guide shaft), 151... Rear barrel (second barrel component), 152.

Claims (1)

レンズを保持した移動枠と、
前記移動枠を前記レンズの光軸方向へ移動可能に支持するガイド軸と、
前記移動枠を前記ガイド軸に沿って移動させるレンズ駆動手段と、
前記移動枠が移動するための所定の領域を内部に有する空間部であって、開口を有する空間部を具えると共に、前記ガイド軸の一端を固定支持する第１の圧入穴を有する第１の鏡筒構成部と、
前記空間部の前記開口を閉じるように前記第１の鏡筒構成部に装着されると共に、前記ガイド軸の他端を固定支持する第２の圧入穴を有する第２の鏡筒構成部と、を備え、
前記ガイド軸の前記第１の圧入穴側の固定強さを前記第２の圧入穴側の固定強さよりも強くした
ことを特徴とするカメラ用レンズ鏡筒。 A moving frame holding the lens,
A guide shaft that supports the moving frame so as to be movable in the optical axis direction of the lens;
Lens driving means for moving the moving frame along the guide shaft;
A space portion having a predetermined region for moving the moving frame therein, the space portion having an opening, and a first press-fitting hole for fixing and supporting one end of the guide shaft. A lens barrel component;
A second lens barrel component that is mounted on the first lens barrel component so as to close the opening of the space and has a second press-fit hole for fixing and supporting the other end of the guide shaft; With
A camera lens barrel, wherein a fixing strength of the guide shaft on the first press-fitting hole side is made stronger than a fixing strength on the second press-fitting hole side.
JP2007079362A 2007-03-26 2007-03-26 Camera lens barrel Expired - Fee Related JP4329834B2 (en)

Priority Applications (1)

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JP2007079362A JP4329834B2 (en) 2007-03-26 2007-03-26 Camera lens barrel

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JP2007079362A JP4329834B2 (en) 2007-03-26 2007-03-26 Camera lens barrel

Related Parent Applications (1)

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JP10650998A Division JP4000665B2 (en) 1998-04-16 1998-04-16 Camera lens barrel

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009085997A (en) * 2007-09-27 2009-04-23 Canon Inc Lens barrel and optical equipment
US8411373B2 (en) 2010-08-19 2013-04-02 Canon Kabushiki Kaisha Zoom lens barrel capable of retracting into lens barrel body

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009085997A (en) * 2007-09-27 2009-04-23 Canon Inc Lens barrel and optical equipment
US8411373B2 (en) 2010-08-19 2013-04-02 Canon Kabushiki Kaisha Zoom lens barrel capable of retracting into lens barrel body

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JP4329834B2 (en) 2009-09-09

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