JPH0821942A - Lens barrel - Google Patents
Lens barrelInfo
- Publication number
- JPH0821942A JPH0821942A JP6154779A JP15477994A JPH0821942A JP H0821942 A JPH0821942 A JP H0821942A JP 6154779 A JP6154779 A JP 6154779A JP 15477994 A JP15477994 A JP 15477994A JP H0821942 A JPH0821942 A JP H0821942A
- Authority
- JP
- Japan
- Prior art keywords
- optical axis
- rotation range
- annular groove
- operation ring
- peripheral surface
- 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.)
- Pending
Links
Landscapes
- Lens Barrels (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、操作環を固定筒に対し
て相対的に光軸回りに回転させてレンズを光軸に沿って
移動させるレンズ鏡筒に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lens barrel for moving a lens along an optical axis by rotating an operating ring around the optical axis relative to a fixed barrel.
【0002】[0002]
【従来の技術】従来のレンズ鏡筒としては、例えば、実
開平5−84907号公報に示すようなものがある。2. Description of the Related Art As a conventional lens barrel, for example, there is one disclosed in Japanese Utility Model Laid-Open No. 5-84907.
【0003】このレンズ鏡筒は、固定筒に対して操作環
をレンズ光軸回りに回転させて、レンズを光軸に沿って
移動させるものである。この操作環には、その外周面に
放射方向に突出した突起が形成されている。また、この
固定筒の内周面には、その外周面方向に凹み、光軸回り
方向に伸びて、操作環の突起が嵌まり込める環状溝が形
成されている。さらに、固定筒には、固定筒の光軸と平
行な方向における一方の端部から環状溝まで貫通する切
欠きが形成されている。操作環を固定筒に組み込む際に
は、操作環を固定筒に対して相対的に光軸と平行な方向
に移動させて、操作環の突起を固定筒の切欠きから環状
溝内に入れる。操作環が組み込まれた固定筒には、固定
筒に対する操作環の回転範囲を規制する回転範囲規制部
材が設けられている。この回転範囲規制部材は、ビス
と、ビスのねじ部が螺合する金属板と、操作環の突起と
当接した際の衝撃をやわらげるゴム板とで構成されてい
る。この回転規制部材を固定筒に設ける際には、ゴム板
及び金属板を固定筒の内周側に形成された環状溝内に入
れておき、ビスを外周側から固定筒に挿通させて、固定
筒の溝内の金属板に螺合させ、ゴム板及び金属板を溝内
に固定している。このゴム板及び金属板が、操作環の突
起に当接して、操作環の回転範囲を規制することにな
る。In this lens barrel, the operating ring is rotated around the optical axis of the lens with respect to the fixed barrel, and the lens is moved along the optical axis. The operation ring is formed with a protrusion protruding in the radial direction on the outer peripheral surface thereof. Further, on the inner peripheral surface of the fixed cylinder, an annular groove is formed which is recessed in the outer peripheral surface direction thereof, extends in the optical axis rotation direction, and into which the projection of the operation ring can be fitted. Further, the fixed barrel is formed with a notch that penetrates from one end in the direction parallel to the optical axis of the fixed barrel to the annular groove. When the operating ring is incorporated into the fixed barrel, the operating ring is moved relative to the fixed barrel in a direction parallel to the optical axis, and the protrusion of the operating ring is inserted into the annular groove through the notch of the fixed barrel. The fixed cylinder in which the operation ring is incorporated is provided with a rotation range restricting member that restricts a rotation range of the operation ring with respect to the fixed cylinder. The rotation range restricting member is composed of a screw, a metal plate with which the screw portion of the screw is screwed, and a rubber plate that relieves the impact when the screw contacts the protrusion of the operation ring. When the rotation restricting member is provided on the fixed cylinder, the rubber plate and the metal plate are put in the annular groove formed on the inner peripheral side of the fixed cylinder, and the screws are inserted into the fixed cylinder from the outer peripheral side to fix the fixed plate. The rubber plate and the metal plate are fixed in the groove by being screwed into the metal plate in the groove of the cylinder. The rubber plate and the metal plate come into contact with the projections of the operation ring to regulate the rotation range of the operation ring.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、このよ
うな従来技術では、回転範囲規制部材が、3つの部材か
ら構成されていることから、その取り付けが甚だ面倒で
ある上に、製造コストが嵩むという問題点がある。However, in such a conventional technique, since the rotation range restricting member is composed of three members, the mounting thereof is very troublesome and the manufacturing cost is high. There is a problem.
【0005】本発明は、このような従来の問題点につい
て着目してなされたもので、回転範囲規制部材を固定筒
に容易に取付けることができ、製造コストの低減を図る
ことができるレンズ鏡筒を提供することを目的とする。The present invention has been made by paying attention to such a conventional problem, and the rotation range regulating member can be easily attached to the fixed barrel, and the manufacturing cost can be reduced. The purpose is to provide.
【0006】[0006]
【課題を解決するための手段】前記目的を達成するため
のは、レンズを支持するレンズ支持枠と、該レンズの光
軸回りに回転可能な筒状の操作環と、該操作環の外周面
の一部を覆う固定筒と、該固定筒に対する前記操作環の
回転範囲を規制する回転範囲規制部材と、該操作環の光
軸回りの回転により、該レンズを支持している該レンズ
支持枠を光軸と平行な方向に移動させる移動機構とを備
え、前記操作環には、前記固定筒に覆われる部分の外周
面に放射方向に突出した突起が形成され、前記固定筒に
は、前記操作環の外周面を覆っている部分の内周面に、
その外周面方向に凹み、光軸回り方向に伸び、該操作環
の該固定筒に対する予め定められた光軸回り回転範囲よ
りその両方向に僅かに大きい範囲に、該操作環の前記突
起が嵌まり込んで摺動可能な環状溝が形成されていると
共に、前記操作環を前記固定筒に対して相対的に光軸と
平行な方向に移動させると、該操作環の前記突起を前記
固定筒の前記溝に嵌まり込めるよう、該固定筒の光軸と
平行な方向における端部から該環状溝の光軸回り方向の
一方の端につながり且つ該突起が丁度入り込める切欠き
が形成され、前記固定筒の外周面から前記環状溝に貫通
し、その光軸回り方向における一方の端が該環状溝の光
軸回りの一方の端と一致し、その光軸回り方向における
他方の端が前記回転範囲の一方の端に一致する第1貫通
孔が形成され、前記固定筒の外周面から前記環状溝に貫
通し、その光軸回り方向における他方の端が該環状溝の
光軸回りの他方の端と一致し、その光軸回り方向におけ
る一方の端が前記回転範囲の他方の端に一致する第2貫
通孔が形成され、前記回転範囲規制部材として、前記固
定筒の前記第1貫通孔及び前記第2貫通孔にそれぞれ嵌
まり込む第1回転範囲規制部材及び第2回転範囲規制部
材があり、それぞれの該回転範囲規制部材は、弾性を有
する一の部材で形成され、前記固定筒の前記貫通孔に丁
度嵌まり込んで前記環状溝内まで至る嵌入部と、該嵌入
部が該環状溝から前記光軸に近づく方向へ抜け出ぬよう
該嵌入部の放射方向の移動を規制するフランジ部とを有
していることを特徴とするものである。To achieve the above object, a lens support frame for supporting a lens, a cylindrical operating ring rotatable around the optical axis of the lens, and an outer peripheral surface of the operating ring are provided. , A rotation range regulating member that regulates a rotation range of the operation ring with respect to the fixed cylinder, and the lens support frame that supports the lens by rotation of the operation ring around the optical axis. A moving mechanism for moving in a direction parallel to the optical axis, the operation ring is formed with a projection protruding in a radial direction on an outer peripheral surface of a portion covered by the fixed cylinder, and the fixed cylinder has the On the inner peripheral surface of the part covering the outer peripheral surface of the operation ring,
The protrusion of the operating ring fits into the outer peripheral surface of the operating ring, extends in the direction around the optical axis, and is slightly larger in both directions than the predetermined range of rotation of the operating ring around the optical axis with respect to the fixed barrel. When the operating ring is moved in the direction parallel to the optical axis relative to the fixed barrel, the protrusion of the operating ring is moved to the fixed barrel. In order to fit in the groove, a notch is formed from the end of the fixed barrel in the direction parallel to the optical axis to one end of the annular groove in the direction around the optical axis, and the projection can be just inserted thereinto. It penetrates from the outer peripheral surface of the cylinder to the annular groove, one end in the direction around the optical axis thereof coincides with one end around the optical axis of the annular groove, and the other end in the direction around the optical axis is the rotation range. A first through hole is formed which coincides with one end of the It penetrates from the outer peripheral surface of the fixed barrel to the annular groove, the other end in the direction around the optical axis coincides with the other end around the optical axis in the annular groove, and the one end in the direction around the optical axis rotates. A second through hole that coincides with the other end of the range is formed, and as the rotation range restricting member, a first rotation range restricting member that fits into the first through hole and the second through hole of the fixed cylinder, respectively, There is a second rotation range restricting member, and each of the rotation range restricting members is formed of one elastic member, and is fitted into the through hole of the fixed cylinder and fits into the annular groove. A flange portion that restricts the radial movement of the fitting portion so that the fitting portion does not come out of the annular groove in a direction approaching the optical axis.
【0007】[0007]
【作用】操作環を固定筒に組み込む際には、操作環を固
定筒に対して光軸と平行な方向に移動し、操作環の突起
を固定筒の切欠きから環状溝に入れる。この結果、操作
環は、その突起が固定筒の環状溝を摺動することで、固
定筒に対して相対的に光軸回りに回転することができ
る。When the operating ring is incorporated in the fixed barrel, the operating ring is moved in the direction parallel to the optical axis with respect to the fixed barrel, and the projection of the operating ring is inserted into the annular groove from the notch of the fixed barrel. As a result, the operation ring can be rotated about the optical axis relative to the fixed barrel by the protrusion sliding on the annular groove of the fixed barrel.
【0008】操作環を固定筒に組み込んだ後に、第1回
転範囲規制部材及び第2回転範囲規制部材を固定筒の外
周側からそれぞれ第1貫通孔及び第2貫通孔に嵌め込
む。各回転範囲規制部材を各貫通孔に嵌め込む際には、
各回転範囲規制部材が固定筒の中心軸(光軸と一致して
いる。)から遠ざかる方向に抜けないよう、各回転範囲
規制部材の外周面に接着剤を施しておく。なお、各回転
範囲規制部材は、そのフランジ部により、固定筒の中心
軸に近づく方向へは、接着剤を施さなくても抜けない。After the operating ring is assembled in the fixed barrel, the first rotation range regulating member and the second rotation range regulating member are fitted into the first through hole and the second through hole from the outer peripheral side of the fixed barrel, respectively. When fitting each rotation range regulating member into each through hole,
An adhesive agent is applied to the outer peripheral surface of each rotation range regulating member so that each rotation range regulating member does not come off in the direction away from the central axis (which coincides with the optical axis) of the fixed cylinder. In addition, the flange portion of each rotation range regulating member does not come off in the direction approaching the central axis of the fixed cylinder without applying an adhesive.
【0009】ところで、第1貫通孔は、その光軸回り方
向における一方の端が環状溝の光軸回りの一方の端と一
致し、その光軸回り方向における他方の端が操作環の回
転範囲の一方の端に一致している。このため、第1貫通
孔に丁度嵌まり込む第1回転規制部材は、第1回転範囲
規制部材の光軸回り方向における他方の端面は回転範囲
の一方の端と一致し、第2回転範囲規制部材の光軸回り
方向における一方の端面は回転範囲の他方の端と一致す
ることになる。従って、突起の回転範囲は、第1回転範
囲規制部材の光軸回り方向における他方の端面と、第2
回転範囲規制部材の光軸回り方向の一方の端面との間に
限定され、目的の回転範囲に規制される。また、本実施
例の回転範囲規制部材は、弾性を有しているため、これ
に操作環の突起が当接しても、その衝撃を柔らげること
ができる。By the way, one end of the first through hole in the direction around the optical axis coincides with one end of the annular groove around the optical axis, and the other end in the direction around the optical axis is the rotation range of the operating ring. Match one end. Therefore, in the first rotation restricting member that is just fitted in the first through hole, the other end surface of the first rotation range restricting member in the optical axis rotation direction coincides with one end of the rotation range, and the second rotation range restricting member. One end surface of the member in the direction around the optical axis coincides with the other end of the rotation range. Therefore, the rotation range of the protrusion is the second end surface of the first rotation range regulating member in the direction around the optical axis and the second rotation range regulating member.
The rotation range restriction member is limited to the one end surface in the direction around the optical axis, and is restricted to the target rotation range. Further, since the rotation range restricting member of this embodiment has elasticity, even if the projection of the operation ring comes into contact with this, the impact can be softened.
【0010】このように、本発明では、回転範囲規制部
材を弾性を有する一の部材で形成しているため、これの
固定筒への装着に関しては、単に、これを固定筒の貫通
孔に嵌め込むだけで済むので、この取り付け作業を非常
に簡略化することができる。また、部品点数が少なくな
ることから、製造コストの削減を図ることもできる。ま
た、本発明では、環状溝の一方の端につながるよう切欠
きが形成され、この切欠きから環状溝内に突起を入れた
後、切欠きのある環状溝の一方の端に第1回転範囲規制
部材を配しているので、操作環の突起が切欠きのある部
分まで至らず、操作環が固定筒から外れることはない。As described above, according to the present invention, since the rotation range restricting member is formed of one member having elasticity, the mounting of the rotating range restricting member to the fixed cylinder is simply performed by fitting it into the through hole of the fixed cylinder. This installation work can be greatly simplified because it only needs to be inserted. Moreover, since the number of parts is reduced, it is possible to reduce the manufacturing cost. Further, in the present invention, a notch is formed so as to be connected to one end of the annular groove, and after the protrusion is inserted from the notch into the annular groove, the first rotation range is provided at one end of the annular groove having the notch. Since the restriction member is provided, the protrusion of the operation ring does not reach the notched portion, and the operation ring does not come off from the fixed cylinder.
【0011】[0011]
【実施例】以下、本発明に係る一実施例のレンズ鏡筒に
ついて、図面を用いて説明する。本実施例のレンズ鏡筒
は、図1に示すように、前群レンズ2及び後群レンズ3
をそれぞれ光軸6に沿って移動させて、ズーミングを行
うと共に、手動及び自動で合焦するものである。DESCRIPTION OF THE PREFERRED EMBODIMENTS A lens barrel according to an embodiment of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the lens barrel of this embodiment includes a front lens group 2 and a rear lens group 3.
Are moved along the optical axis 6 to perform zooming, and to focus manually and automatically.
【0012】このレンズ鏡筒は、カメラボディに対して
相対回転及び相対移動不能に取付けられる円筒状の固定
筒4と、前群レンズ2を支持する前群レンズ支持枠13
と、後群レンズ3を支持する後群レンズ支持枠8と、光
軸回りに回転可能に配されている円筒状のズーム操作環
11と、光軸回りにスパイラル状のカム溝5a,5bが
形成されズーム操作環11の回転に伴って光軸回りに回
転するズームカム環5と、ズームカム環5のカム溝5
a,5bに嵌まり込みその端部がレンズ支持枠8等に固
定されているカムピン9,10と、光軸回りに回転して
前群レンズ2と共に前群レンズ支持枠13を光軸6にそ
って移動させる合焦操作環12と、合焦操作環12の回
転範囲を規制する回転範囲規制部材21,21’とを有
して構成されている。This lens barrel has a cylindrical fixed barrel 4 mounted so as not to rotate and move relative to the camera body, and a front lens group support frame 13 for supporting the front lens group 2.
A rear lens group support frame 8 for supporting the rear lens group 3, a cylindrical zoom operation ring 11 rotatably arranged around the optical axis, and spiral cam grooves 5a, 5b around the optical axis. A zoom cam ring 5 that is formed and rotates around the optical axis as the zoom operation ring 11 rotates, and a cam groove 5 of the zoom cam ring 5.
The cam pins 9 and 10 which are fitted in the a and 5b and whose end portions are fixed to the lens support frame 8 and the like, and the front group lens support frame 13 together with the front group lens 2 on the optical axis 6 by rotating around the optical axis. The focusing operation ring 12 is moved along with the focusing operation ring 12, and the rotation range restricting members 21 and 21 ′ that restrict the rotation range of the focusing operation ring 12 are configured.
【0013】固定筒4は、光軸6を中心軸とする内周側
円筒部4Bと外周側円筒部4Aとを有して、互いに一体
形成されて構成されている。内周側円筒部4Bのカメラ
ボディ側には、カメラボディに取付けるための突起4a
が形成されている。また、内周側円筒部4Bには、その
外周側から内周側へ貫通し光軸6と平行な方向に伸びて
いる直進溝4b,4cが形成されている。外周側円筒部
4Aの被写体側端部には、その内周面に、その外周側方
向に凹み光軸回り方向に伸びている環状溝4f,4f’
が形成されていると共に、その被写体側端から環状溝4
f,4f’までつながる切欠き4h,4iが形成されて
いる。さらに、外周側円筒部4Aには、そのカメラボデ
ィ側に、その外周側から内周側へ貫通し光軸回り方向に
伸びている環状貫通孔4jが形成されている。The fixed barrel 4 has an inner peripheral side cylindrical portion 4B and an outer peripheral side cylindrical portion 4A having an optical axis 6 as a central axis, and is integrally formed with each other. A protrusion 4a for attaching to the camera body is provided on the camera body side of the inner peripheral side cylindrical portion 4B.
Are formed. Further, the inner peripheral side cylindrical portion 4B is formed with rectilinear grooves 4b and 4c penetrating from the outer peripheral side to the inner peripheral side and extending in a direction parallel to the optical axis 6. At the subject side end of the outer peripheral side cylindrical portion 4A, annular grooves 4f, 4f 'which are recessed in the outer peripheral side direction on the inner peripheral surface and extend in the optical axis rotation direction.
Is formed, and the annular groove 4 is formed from the end on the subject side.
Notches 4h and 4i are formed to connect up to f and 4f '. Furthermore, on the camera body side of the outer peripheral side cylindrical portion 4A, an annular through hole 4j penetrating from the outer peripheral side to the inner peripheral side and extending in the optical axis rotation direction is formed.
【0014】ズーム操作環11は、固定筒4の外周側円
筒部4Aの外周側に光軸回りに回転可能に配されている
ズーム操作環本体11Aと、この本体11Aの内周面か
ら光軸に近づく方向に伸びているアーム部11Bとを有
している。このアーム部11Bが、前述した、固定筒4
の外周側円筒部4Aの環状貫通孔4jを通り、固定筒4
の外周側円筒部4Aと内周側円筒部4Bとの間に臨んで
いる。The zoom operating ring 11 includes a zoom operating ring main body 11A which is rotatably arranged around the optical axis on the outer peripheral side of the outer peripheral side cylindrical portion 4A of the fixed barrel 4, and an optical axis from the inner peripheral surface of the main body 11A. And an arm portion 11B extending in a direction approaching. This arm portion 11B corresponds to the fixed cylinder 4 described above.
Through the annular through hole 4j of the outer peripheral side cylindrical portion 4A of the fixed cylinder 4
Between the outer peripheral side cylindrical portion 4A and the inner peripheral side cylindrical portion 4B.
【0015】カム環5は、固定筒4の内周側円筒部4B
の外周側に光軸回りに回転可能に配されている。このカ
ム環5のカメラボディ側端部5cには、ズーム操作環1
1のアーム部11Bの端部が嵌まり込んでいる。このた
め、カム環5は、ズーム操作環11を回転させると、こ
の回転に伴って光軸回りに回転する。カム環5に形成さ
れているカム溝5a,5bとしては、前群レンズ用5a
と後群レンズ用5bとがある。また、固定筒4の内周側
円筒部4Bに形成されている直進溝4b,4cも、前群
レンズ用4bと後群レンズ用4cとがある。前群レンズ
用カム溝5a及び前群レンズ用直進溝4bには、前群レ
ンズ用カムピン9が挿通され、その内側端が後述する前
群レンズ螺合環7に埋め込まれている。また、後群レン
ズ用カム溝5b及び後群レンズ用直進溝4cには、後群
レンズ用カムピン10が挿通され、その内側端が後レン
ズ支持枠8に埋め込まれ入ている。The cam ring 5 is a cylindrical portion 4B on the inner peripheral side of the fixed barrel 4.
Is arranged on the outer peripheral side of the so as to be rotatable around the optical axis. At the end 5c of the cam ring 5 on the camera body side, the zoom operation ring 1
The end portion of the first arm portion 11B is fitted. Therefore, when the zoom operation ring 11 is rotated, the cam ring 5 rotates around the optical axis along with this rotation. The cam grooves 5a and 5b formed in the cam ring 5 are the front lens group 5a.
And 5b for the rear lens group. Further, the rectilinear grooves 4b and 4c formed on the inner peripheral side cylindrical portion 4B of the fixed barrel 4 also have a front lens group 4b and a rear lens group 4c. A cam pin 9 for the front lens group is inserted into the cam groove 5a for the front lens group and the rectilinear groove 4b for the front lens group, and the inner end of the cam pin 9 is embedded in a front lens group screw ring 7 described later. A rear group lens cam pin 5 is inserted into the rear group lens cam groove 5b and the rear group lens rectilinear groove 4c, and the inner end of the cam pin 10 is embedded in the rear lens support frame 8.
【0016】合焦操作環12は、固定筒4の外周側円筒
部4Aの外径とほぼ同じ外径で外周側円筒部4Aの被写
体側に位置している円筒状の操作部12Aと、外周側円
筒部4Aの内径よりも僅かに小さい外径で外周側円筒部
4Aと内周側円筒部4Bとの間に入り込んでいる円筒状
の***作部12Bとを有し、互いに一体形成されて構成
されている。円筒状の操作部12Aは、その内周面に外
周方向へ凹み光軸6と平行な方向に伸びている直進凹部
12bが形成されている。また、円筒状の***作部12
Bには、その被写体側の外周面に、放射方向に突出して
固定筒4の外周側円筒部4Aに形成されている環状溝4
f,4f’に嵌まり込む突起12f,12f’が形成さ
れ、そのカメラボディ側の内周面に、光軸回りに伸びて
いる内歯12cが形成されている。この内歯12cに
は、固定筒4の外周側円筒部4Aと内周側円筒部4Bに
配されているピニオン14と係合しており、このピニオ
ン14を回転させることで合焦操作環12を光軸回りに
回転させることができる。なお、このピニオン14は、
図示されていないモータにより回転させられる。The focusing operation ring 12 has a cylindrical operation portion 12A positioned on the object side of the outer peripheral side cylindrical portion 4A with an outer diameter substantially the same as the outer diameter of the outer peripheral side cylindrical portion 4A of the fixed barrel 4, and the outer periphery. An outer diameter slightly smaller than the inner diameter of the side cylindrical portion 4A, and a cylindrical operated portion 12B that is inserted between the outer peripheral side cylindrical portion 4A and the inner peripheral side cylindrical portion 4B, and are integrally formed with each other. It is configured. The cylindrical operation portion 12A has a straight-moving recess 12b formed on the inner peripheral surface thereof so as to be recessed in the outer peripheral direction and extend in a direction parallel to the optical axis 6. In addition, the cylindrical operated portion 12
B is an annular groove 4 formed on an outer peripheral side cylindrical portion 4A of the fixed barrel 4 projecting in the radial direction on the outer peripheral surface of the subject side.
Protrusions 12f and 12f 'that fit into f and 4f' are formed, and inner teeth 12c extending around the optical axis are formed on the inner peripheral surface of the camera body side. The inner teeth 12c are engaged with the pinions 14 arranged on the outer peripheral side cylindrical portion 4A and the inner peripheral side cylindrical portion 4B of the fixed barrel 4, and the focusing operation ring 12 is rotated by rotating the pinion 14. Can be rotated around the optical axis. In addition, this pinion 14
It is rotated by a motor (not shown).
【0017】前群レンズ支持枠13は、前群レンズ2が
支持される円筒状のレンズ支持部13Aと、その外周側
に位置している円筒状の操作環連結部13Bとを有し、
互いに一体形成されて構成されている。レンズ支持部1
3Aの外周面には、光軸を中心としてスパイラル状の雄
ネジ13aが形成されている。前述した前群レンズ螺合
環7の内周面には、光軸を中心としてスパイラル状でこ
の雄ネジ13aに螺合する雌ネジ7aが形成されてい
る。操作環連結部13Bには、放射方向に突出し、合焦
操作環12の直進凹部12bに嵌まり込む突起13bが
形成されている。The front lens group supporting frame 13 has a cylindrical lens supporting portion 13A for supporting the front lens group 2 and a cylindrical operating ring connecting portion 13B located on the outer peripheral side thereof.
They are formed integrally with each other. Lens support 1
On the outer peripheral surface of 3A, a spiral male screw 13a is formed around the optical axis. On the inner peripheral surface of the above-mentioned front group lens screw ring 7, a female screw 7a which is spirally fitted around the optical axis and is screwed to the male screw 13a is formed. The operation ring connecting portion 13B is formed with a projection 13b which projects in the radial direction and is fitted into the rectilinear recess 12b of the focusing operation ring 12.
【0018】回転範囲規制部材21,21’は、図3に
示すように、弾性を有する一の部材で形成され、固定筒
4の外周側からその内周面に形成されている環状溝4f
へ貫通して、環状溝4fの一部を塞ぐ嵌入部21a,2
1a’と、嵌入部21a,21a’が環状溝4fから光
軸に近づく方向へ抜け出ぬよう嵌入部21a,21a’
の放射方向の移動を規制するフランジ部21b,21
b’とを有している。弾性を有する回転範囲規制部材2
1,21’は、具体的には、ゴムで形成されている。な
お、本実施例において、合焦操作環12の光軸回りの回
転により、前群レンズ支持枠13を光軸6と平行な方向
に移動させる移動機構は、合焦操作環12に形成されて
いる直進凹部12bと、前群レンズ支持枠13の突起1
3bと、前群レンズ支持枠13が螺合している前群レン
ズ螺合環7とを有して構成されている。As shown in FIG. 3, the rotation range restricting members 21, 21 'are formed of one member having elasticity, and the annular groove 4f is formed from the outer peripheral side of the fixed cylinder 4 to the inner peripheral surface thereof.
The fitting portions 21a, 2 penetrating into the annular groove 4f and blocking a part of the annular groove 4f.
1a 'and the fitting portions 21a, 21a' do not come out from the annular groove 4f in the direction approaching the optical axis.
21b, 21 for restricting the radial movement of the
b '. Rotation range regulating member 2 having elasticity
1, 21 'are specifically formed of rubber. In the present embodiment, a moving mechanism that moves the front lens group support frame 13 in the direction parallel to the optical axis 6 by rotating the focusing operation ring 12 around the optical axis is formed in the focusing operation ring 12. The straight-moving concave portion 12b and the projection 1 of the front lens group supporting frame 13
3b and the front lens group screwing ring 7 with which the front lens group supporting frame 13 is screwed.
【0019】ここで、固定筒4の環状溝4f,4f’、
この環状溝4f,4f’に嵌まり込む合焦操作環12の
突起12f,12f’、合焦操作環12の回転範囲θを
規制する回転範囲規制部材21,21’の関係につい
て、詳細に説明する。合焦操作環12の突起12f,1
2f’は、図2に示すように、光軸を中心として互いに
対称な位置に2つある。また、固定筒4の環状溝4f,
4f’も、合焦操作環12の2つの突起12f,12
f’がそれぞれ嵌まり込めるよう、2つある。これら環
状溝4f,4f’のうち一方の環状溝4fは、その光軸
回り方向の形成領域が合焦操作環12の予め定められた
回転範囲θよりもその両方向に僅かに大きくなってい
る。すなわち、この環状溝4fの光軸回り方向の両端に
それぞれ回転範囲規制部材21,21’の嵌入部21
a,21a’を埋め込むと、それぞれの回転範囲規制部
材21,21’の端面21c,21c’相互の幅が合焦
操作環12の回転範囲θに一致するするよう、この環状
溝4fは形成されている。これらの回転範囲規制部材2
1,21’を固定筒4に嵌め込むために、固定筒4に
は、固定筒4の外周面から環状溝4fに貫通する第1貫
通孔4p及び第2貫通孔4p’が形成されている。第1
貫通孔4pは、その光軸回り方向における一方の端面が
環状溝4fの光軸回りの一方の端4f1と一致し、その
光軸回り方向における他方の端面が回転範囲θの一方の
端θ1に一致するよう形成され、第2貫通孔4p’は、
その光軸回り方向における他方の端面が環状溝4fの光
軸回りの他方の端4f2と一致し、その光軸回り方向に
おける一方の端面が回転範囲θの他方の端θ2に一致す
るよう形成されている。固定筒4の外周面で各貫通孔4
p,4p’の周囲には、各回転範囲規制部材21,2
1’のフランジ部21b,21bが納まるフランジ用凹
部4q,4q’が形成されている。このフランジ用凹部
4q,4q’は、光軸回り方向において、貫通孔4p,
4p’を中心として環状溝4fが形成されていない方向
に伸びている。つまり、このフランジ用凹部4q,4
q’は、環状溝4fが形成されている箇所の外周面上に
は形成されていない。これは、光軸回り方向において、
環状溝4fとフランジ用凹部4q,4q’との位置が一
致していると、内周側と外周側とから凹部形成するにあ
たり、凹部相互がつながらないよう、固定筒4の放射方
向の厚みを厚くする必要が生じるためである。このた
め、回転範囲規制部材21,21’のフランジ部21
b,21b’は、その嵌入部21a,21’を中心とし
て一方の方向にしか伸びていない。固定筒4に形成され
ている切欠き4hは、固定筒4の被写体側端から、光軸
6と平行な方向に伸びて、環状溝4fの光軸回り方向の
一方の端部4f1につながり且つ操作環12の突起12
fが丁度入り込めるよう形成されている。Here, the annular grooves 4f, 4f 'of the fixed barrel 4,
The relationship between the projections 12f and 12f ′ of the focusing operation ring 12 fitted in the annular grooves 4f and 4f ′ and the rotation range regulating members 21 and 21 ′ that regulate the rotation range θ of the focusing operation ring 12 will be described in detail. To do. Protrusions 12f, 1 of the focusing operation ring 12
As shown in FIG. 2, there are two 2f 'at positions symmetrical to each other about the optical axis. In addition, the annular groove 4f of the fixed cylinder 4,
4f ′ also includes two protrusions 12f, 12 of the focusing operation ring 12.
There are two so that f'can be fitted respectively. One of the annular grooves 4f and 4f 'has a formation region in the direction around the optical axis that is slightly larger in both directions than the predetermined rotation range θ of the focusing operation ring 12. That is, the fitting portions 21 of the rotation range restricting members 21, 21 'are respectively provided at both ends of the annular groove 4f in the optical axis direction.
When the a and 21a 'are embedded, the annular groove 4f is formed so that the mutual widths of the end faces 21c and 21c' of the respective rotation range restricting members 21 and 21 'coincide with the rotation range θ of the focusing operation ring 12. ing. These rotation range regulating members 2
In order to fit 1, 2 ′ into the fixed cylinder 4, the fixed cylinder 4 is formed with a first through hole 4p and a second through hole 4p ′ that penetrate the outer peripheral surface of the fixed cylinder 4 into the annular groove 4f. . First
One end surface of the through hole 4p in the optical axis rotation direction coincides with one end 4f 1 of the annular groove 4f around the optical axis, and the other end surface in the optical axis rotation direction has one end θ of the rotation range θ. The second through hole 4p 'is formed so as to correspond to 1 ,
The other end face in the direction around the optical axis coincides with the other end 4f 2 around the optical axis in the annular groove 4f, and the one end face in the direction around the optical axis coincides with the other end θ 2 in the rotation range θ. Has been formed. Each through hole 4 is formed on the outer peripheral surface of the fixed cylinder 4.
The rotation range restriction members 21 and 2 are provided around p and 4p '.
Flange recesses 4q and 4q 'in which the 1'flange portions 21b and 21b are housed are formed. The flange recesses 4q and 4q 'are formed in the through-holes 4p and 4p in the direction around the optical axis.
It extends in the direction in which the annular groove 4f is not formed with 4p 'as the center. That is, the flange recesses 4q, 4
q'is not formed on the outer peripheral surface of the portion where the annular groove 4f is formed. This is in the direction around the optical axis,
If the positions of the annular groove 4f and the flange recesses 4q and 4q 'are aligned, the radial thickness of the fixed cylinder 4 is increased so that the recesses are not connected to each other when forming the recesses from the inner peripheral side and the outer peripheral side. It is necessary to do so. Therefore, the flange portion 21 of the rotation range restricting member 21, 21 '
The b and 21b 'extend only in one direction around the fitting portions 21a and 21'. The cutout 4h formed in the fixed barrel 4 extends from the subject side end of the fixed barrel 4 in a direction parallel to the optical axis 6 and is connected to one end 4f 1 of the annular groove 4f in the optical axis rotation direction. And the projection 12 of the operating ring 12
It is formed so that f can enter exactly.
【0020】また、他方の環状溝4f’も、一方の環状
溝4fと同様に、その光軸回り方向の形成領域が合焦操
作環12の予め定められた回転範囲θよりもその両方向
に僅かに大きくなっている。この環状溝4f’に対して
も、固定筒4の被写体側端から、光軸と平行な方向に伸
びて、この環状溝4f’の光軸回り方向の一方の端部4
f1’につながる切欠き4iが形成されている。なお、
この環状溝4f’に嵌まり込む突起12f’に対して
は、回転範囲規制部材21,21’を設けていない。こ
れは、一方の環状溝4fに嵌まり込む突起12fに対し
て、回転範囲規制部材21,21’を設けるのみで、固
定筒4に対する合焦操作環12の回転範囲θを規制でき
るからである。Similarly to the one annular groove 4f, the other annular groove 4f 'has a formation region in the direction around the optical axis which is slightly smaller than the predetermined rotation range θ of the focusing ring 12 in both directions. Is getting bigger. Also with respect to this annular groove 4f ′, it extends from the subject side end of the fixed barrel 4 in a direction parallel to the optical axis, and one end 4 of this annular groove 4f ′ in the optical axis rotation direction.
A notch 4i connected to f 1 'is formed. In addition,
The rotation range restricting members 21 and 21 'are not provided for the projection 12f' that fits in the annular groove 4f '. This is because the rotation range θ of the focusing operation ring 12 with respect to the fixed barrel 4 can be restricted only by providing the rotation range restriction members 21 and 21 ′ with respect to the projection 12f fitted in the one annular groove 4f. .
【0021】操作環12を固定筒4に組み込む際には、
操作環12を固定筒4に対して光軸と平行な方向に移動
し、操作環12の各突起12f,12f’を固定筒4の
各切欠き4h,4iから環状溝4f,4f’に入れる。
この結果、合焦操作環12は、その突起12f,12
f’が固定筒4の環状溝4f,4f’内を摺動すること
で、固定筒4に対して相対的に光軸回りに回転すること
ができる。When incorporating the operating ring 12 into the fixed barrel 4,
The operating ring 12 is moved in a direction parallel to the optical axis with respect to the fixed barrel 4, and the protrusions 12f and 12f 'of the operating ring 12 are inserted into the annular grooves 4f and 4f' from the notches 4h and 4i of the fixed barrel 4. .
As a result, the focusing operation ring 12 has its projections 12f, 12
By sliding f'in the annular grooves 4f, 4f 'of the fixed barrel 4, it is possible to rotate relatively to the fixed barrel 4 around the optical axis.
【0022】このように、操作環12を固定筒4に組み
込んだ後に、第1回転範囲規制部材21及び第2回転範
囲規制部材21’をそれぞれ第1貫通孔4p及び第2貫
通孔4p’に嵌め込む。各回転範囲規制部材21,2
1’を各貫通孔4p,4p’に嵌め込む際には、各回転
範囲規制部材21,21’が固定筒4の中心軸(光軸と
一致している。)から遠ざかる方向に抜けないよう、各
回転範囲規制部材21,21’の外周面に接着剤を施し
ておく。なお、各回転範囲規制部材21,21’は、そ
のフランジ部21b,21b’により、固定筒4の中心
軸に近づく方向へは、接着剤を施さなくても抜けない。
前述したように、第1回転範囲規制部材21の他方の端
面21cは回転範囲θの一方の端θ1と一致し、第2回
転範囲規制部材21’の一方の端面21c’は回転範囲
θの他方の端θ2と一致しているため、これら二つの回
転範囲規制部材21,21’により、突起12fの回転
範囲は目的の回転範囲θに規制される。また、本実施例
の回転範囲規制部材21,21’は、弾性を有している
ため、これに操作環12の突起12fが当接しても、そ
の衝撃を柔らげることができる。In this way, after the operation ring 12 is assembled in the fixed barrel 4, the first rotation range regulating member 21 and the second rotation range regulating member 21 'are respectively placed in the first through hole 4p and the second through hole 4p'. Fit in. Each rotation range regulation member 21,2
When fitting 1'into each through hole 4p, 4p ', each rotation range regulating member 21, 21' is prevented from coming off in a direction away from the central axis of the fixed barrel 4 (which coincides with the optical axis). An adhesive is applied to the outer peripheral surface of each rotation range regulating member 21, 21 '. Note that the respective rotation range regulating members 21, 21 'cannot be pulled out in the direction approaching the central axis of the fixed barrel 4 by the flange portions 21b, 21b' without applying an adhesive.
As described above, the other end surface 21c of the first rotation range restriction member 21 coincides with one end θ 1 of the rotation range θ, and the one end surface 21c ′ of the second rotation range restriction member 21 ′ has the rotation range θ. Since it coincides with the other end θ 2 , the rotation range of the projection 12f is restricted to the target rotation range θ by these two rotation range restriction members 21 and 21 ′. Further, since the rotation range regulating members 21 and 21 'of this embodiment have elasticity, even if the projection 12f of the operation ring 12 comes into contact with this, the impact can be softened.
【0023】以上のように、本実施例では、回転範囲規
制部材21,21’を弾性を有する一の部材で形成して
いるため、これの固定筒4への装着に関しては、単に、
これを固定筒4の貫通孔4p,4p’に嵌め込むだけで
済むので、この取り付け作業を非常に簡略化することが
できる。また、部品点数が少なくなることから、製造コ
ストの削減を図ることもできる。As described above, in this embodiment, since the rotation range restricting members 21 and 21 'are formed of one member having elasticity, the mounting of the rotating range restricting members 21 and 21' on the fixed cylinder 4 is simply performed.
Since this need only be fitted into the through holes 4p and 4p 'of the fixed cylinder 4, this mounting work can be greatly simplified. Moreover, since the number of parts is reduced, it is possible to reduce the manufacturing cost.
【0024】ところで、撮影者が、合焦操作環12を操
作中に、合焦操作環12を固定筒4に対して相対的に光
軸6と平行な方向に移動させてしまうことがある。この
時、合焦操作環12の突起12f,12f’が切欠き4
h,4iのある環状溝4f,4f’の端部に位置してい
ると、合焦操作環12は、固定筒4から外れてしまう。
このため、本実施例では、環状溝4fの端部4f1につ
ながるよう切欠き4hを形成し、この切欠き4hのある
環状溝4fの端部4f1に回転範囲規制部材21を配し
て、操作環12の突起12fが切欠き4hのある部分ま
で至らないようにしている。By the way, the photographer may move the focusing operation ring 12 relative to the fixed barrel 4 in a direction parallel to the optical axis 6 while operating the focusing operation ring 12. At this time, the projections 12f and 12f ′ of the focusing operation ring 12 are notched 4
When located at the ends of the annular grooves 4f and 4f ′ having h and 4i, the focusing operation ring 12 is disengaged from the fixed barrel 4.
Therefore, in this embodiment, the notch 4h is formed so as to be connected to the end 4f 1 of the annular groove 4f, and the rotation range restricting member 21 is arranged at the end 4f 1 of the annular groove 4f having the notch 4h. The projection 12f of the operation ring 12 is prevented from reaching the portion having the notch 4h.
【0025】次に、本実施例のレンズ鏡筒の動作につい
て簡単に説明する。ズーミングを行う際には、ズーム操
作環11を光軸回りに回転させる。ズーム操作環11
は、そのアーム部11Bの端部がカム環5に嵌まり込ん
でいるため、このズーム操作環11の回転に伴って、カ
ム環5も光軸回りに回転する。このカム環5のカム溝5
a,5bに嵌まり込んでいる各カムピン9,10は、カ
ム環5の回転に伴って、各カム溝5a,5bに沿って移
動する。このカム溝5a,5bは、光軸を中心としてス
パイラル状に形成されているため、カムピン9,10
は、光軸と平行な方向と光軸回り方向との合成方向に移
動しようとする。しかし、カムピン9,10は、固定筒
4に形成されている光軸6と平行な直進溝4b,4cに
も嵌まり込んでいるため、光軸回り方向へは移動でき
ず、光軸6と平行な方向にのみ移動する。この結果、前
群レンズ用カムピン9の端部が固定されている前群レン
ズ螺合環7、これに螺合している前群レンズ支持枠1
3、及びこれに支持されている前群レンズ2は、光軸6
と平行な方向へ移動する。また、後群レンズ用カムピン
の端部が固定されている後レンズ支持枠8、及びこれに
支持されている後群レンズ3も、光軸6と平行な方向へ
移動する。Next, the operation of the lens barrel of this embodiment will be briefly described. When performing zooming, the zoom operation ring 11 is rotated around the optical axis. Zoom operation ring 11
Since the end of the arm portion 11B is fitted into the cam ring 5, the cam ring 5 also rotates around the optical axis as the zoom operation ring 11 rotates. Cam groove 5 of this cam ring 5
The cam pins 9 and 10 fitted in the a and 5b move along the cam grooves 5a and 5b as the cam ring 5 rotates. Since the cam grooves 5a, 5b are formed in a spiral shape around the optical axis, the cam pins 9, 10
Tries to move in a direction in which the direction parallel to the optical axis and the direction around the optical axis are combined. However, since the cam pins 9 and 10 are also fitted in the rectilinear grooves 4b and 4c formed in the fixed barrel 4 and parallel to the optical axis 6, the cam pins 9 and 10 cannot move in the direction around the optical axis, and cannot be moved to the optical axis 6. Move only in parallel directions. As a result, the front group lens screw ring 7 to which the end of the front group lens cam pin 9 is fixed, and the front group lens support frame 1 screwed to the front group lens screw ring 7.
3 and the front lens group 2 supported by the optical axis 6
Move in a direction parallel to. Further, the rear lens support frame 8 to which the end portion of the rear group lens cam pin is fixed and the rear group lens 3 supported by this also move in a direction parallel to the optical axis 6.
【0026】ズーム操作環11を操作して、目的の倍率
が得られると、今度は、焦点を合わせるために、合焦操
作環12を光軸回りに回転させる。合焦操作環12を回
転させると、合焦操作環12の直進凹部12bに前群レ
ンズ支持枠13の突起13bが嵌まり込んでいるため、
この前群レンズ支持枠13は、光軸回りに回転する。と
ころで、この前群レンズ支持枠13は、前群レンズ螺合
環7のスパイラル状に形成されている雌ネジ7aに螺合
しているため、光軸回りに回転しつつ光軸と平行な方向
へ移動する。この結果、前群レンズ2は、光軸と平行な
方向へ移動して、被写体に対する焦点が合う。なお、ズ
ーム操作環11は、手動で回転させることも可能である
が、前述したように、図示されていないモータを駆動さ
せて回転させることも可能である。When the desired magnification is obtained by operating the zoom operation ring 11, this time, the focusing operation ring 12 is rotated around the optical axis in order to focus. When the focusing operation ring 12 is rotated, the projection 13b of the front lens group support frame 13 is fitted into the rectilinear recess 12b of the focusing operation ring 12,
The front lens group support frame 13 rotates around the optical axis. By the way, since the front lens group supporting frame 13 is screwed into the female screw 7a formed in the spiral shape of the front lens group screw ring 7, the front lens group supporting frame 13 rotates in the direction parallel to the optical axis while rotating around the optical axis. Move to. As a result, the front lens group 2 moves in a direction parallel to the optical axis to bring the subject into focus. The zoom operation ring 11 can be manually rotated, but can also be rotated by driving a motor (not shown) as described above.
【0027】なお、以上の実施例においては、合焦操作
環12と固定筒4との関係において、本発明を適用した
ものであるが、本発明は、これに限定されるものではな
く、2つの筒を有し、一方の筒が他方の筒に対して相対
的に回転できるように取付けられているものであれば、
本発明を適用してもよいことは言うまでもない。Although the present invention is applied to the relationship between the focusing ring 12 and the fixed barrel 4 in the above embodiment, the present invention is not limited to this. If it has two cylinders and one cylinder is attached so that it can rotate relative to the other cylinder,
It goes without saying that the present invention may be applied.
【0028】[0028]
【発明の効果】本発明によれば、一の部材で形成された
回転範囲規制部材で操作環の回転範囲を規制しているの
で、その取付作業を容易に行うことができる。さらに、
部品点数が少なくなるので、製造コストの削減も図るこ
とができる。According to the present invention, since the rotation range of the operating ring is restricted by the rotation range restricting member formed of one member, the mounting work thereof can be easily performed. further,
Since the number of parts is reduced, the manufacturing cost can be reduced.
【図1】本発明に係る一実施例のレンズ鏡筒の断面図で
ある。FIG. 1 is a sectional view of a lens barrel of an embodiment according to the present invention.
【図2】図1におけるB矢視図である。FIG. 2 is a view on arrow B in FIG.
【図3】本発明に係る一実施例の固定筒及び操作環の要
部斜視図である。FIG. 3 is a perspective view of a main part of a fixed cylinder and an operation ring according to an embodiment of the present invention.
2…前群レンズ、3…後群レンズ、4…固定筒、4b…
前群レンズ用直進溝、4c…後群レンズ用直進溝、4
h,4i…切欠き、4f,4f’…環状溝、4f1…環
状溝の一方の端、4f2…環状溝の他方の端、4p…第
1貫通孔、4p’…第2貫通孔、4q,4q’…フラン
ジ用凹部、5…カム環、5a…前群レンズ用カム溝、5
b…後群レンズ用カム溝、6…光軸、7…前群レンズ螺
合環、8…後群レンズ支持枠、9…前群レンズ用カムピ
ン、10…後群レンズ用カムピン、11…ズーム操作
環、12…合焦操作環、12b…直進凹部、12c…内
歯、12f,12f’…合焦操作環の突起、13…前群
レンズ支持枠、13a…雄ネジ、13b…前群レンズ支
持枠の突起、14…ピニオン、21,21’…回転範囲
規制部材、21a,21a’…嵌入部、21b,21
b’…フランジ部、21c,21c’…端面。2 ... front lens group, 3 ... rear lens group, 4 ... fixed barrel, 4b ...
Straight groove for front lens group, 4c ... Straight groove for rear lens group, 4
h, 4i ... notch, 4f, 4f '... annular groove, 4f 1 ... one end of the annular groove, 4f 2 ... the other end of the annular groove, 4p ... first through hole, 4p' ... second through hole, 4q, 4q '... Flange recess, 5 ... Cam ring, 5a ... Front group lens cam groove, 5
b ... Rear lens group cam groove, 6 ... Optical axis, 7 ... Front group lens screw ring, 8 ... Rear group lens support frame, 9 ... Front group lens cam pin, 10 ... Rear group lens cam pin, 11 ... Zoom Operating ring, 12 ... Focusing operating ring, 12b ... Straight recess, 12c ... Inner teeth, 12f, 12f '... Focusing operating ring projection, 13 ... Front lens group support frame, 13a ... Male screw, 13b ... Front group lens Support frame projections, 14 ... Pinions, 21, 21 '... Rotation range restricting members, 21a, 21a' ... Fitting portions, 21b, 21
b '... flange part, 21c, 21c' ... end face.
Claims (1)
しているレンズ鏡筒において、 前記レンズを支持するレンズ支持枠と、 前記レンズの光軸回りに回転可能な筒状の操作環と、 前記操作環の外周面の一部を覆う固定筒と、 前記固定筒に対する前記操作環の回転範囲を規制する回
転範囲規制部材と、 前記操作環の光軸回りの回転により、前記レンズを支持
している前記レンズ支持枠を光軸と平行な方向に移動さ
せる移動機構とを備え、 前記操作環には、前記固定筒に覆われる部分の外周面に
放射方向に突出した突起が形成され、 前記固定筒には、 前記操作環の外周面を覆っている部分の内周面に、その
外周面方向に凹み、光軸回り方向に伸び、該操作環の該
固定筒に対する予め定められた光軸回り回転範囲よりそ
の両方向に僅かに大きい範囲に、該操作環の前記突起が
嵌まり込んで摺動可能な環状溝が形成されていると共
に、 前記操作環を前記固定筒に対して相対的に光軸と平行な
方向に移動させると、該操作環の前記突起を前記固定筒
の前記溝に嵌まり込めるよう、該固定筒の光軸と平行な
方向における端部から該環状溝の光軸回り方向の一方の
端につながり且つ該突起が丁度入り込める切欠きが形成
され、 前記固定筒の外周面から前記環状溝に貫通し、その光軸
回り方向における一方の端が該環状溝の光軸回りの一方
の端と一致し、その光軸回り方向における他方の端が前
記回転範囲の一方の端に一致する第1貫通孔が形成さ
れ、 前記固定筒の外周面から前記環状溝に貫通し、その光軸
回り方向における他方の端が該環状溝の光軸回りの他方
の端と一致し、その光軸回り方向における一方の端が前
記回転範囲の他方の端に一致する第2貫通孔が形成さ
れ、 前記回転範囲規制部材として、前記固定筒の前記第1貫
通孔及び前記第2貫通孔にそれぞれ嵌まり込む第1回転
範囲規制部材及び第2回転範囲規制部材があり、それぞ
れの該回転範囲規制部材は、弾性を有する一の部材で形
成され、前記固定筒の前記貫通孔に丁度嵌まり込んで前
記環状溝内まで至る嵌入部と、該嵌入部が該環状溝から
前記光軸に近づく方向へ抜け出ぬよう該嵌入部の放射方
向の移動を規制するフランジ部とを有していることを特
徴とするレンズ鏡筒。1. A lens barrel that houses a lens movably along its optical axis, and a lens support frame that supports the lens, and a tubular operation ring that is rotatable around the optical axis of the lens. A fixed cylinder that covers a part of the outer peripheral surface of the operation ring; a rotation range restriction member that restricts a rotation range of the operation ring with respect to the fixed cylinder; A moving mechanism that moves the supported lens support frame in a direction parallel to the optical axis, and the operation ring has a protrusion protruding in a radial direction on an outer peripheral surface of a portion covered by the fixed cylinder. The fixed cylinder is provided with a predetermined portion with respect to the fixed cylinder of the operation ring that is recessed in the outer peripheral surface direction of the portion covering the outer peripheral surface of the operation ring and extends in the direction of the outer peripheral surface of the operation ring. Slightly larger than the rotation range around the optical axis in both directions An annular groove in which the projection of the operating ring is fitted and slidable is formed in a certain range, and the operating ring is moved in a direction parallel to the optical axis relative to the fixed barrel. And so that the protrusion of the operation ring fits into the groove of the fixed barrel, the end of the fixed barrel in the direction parallel to the optical axis is connected to one end of the annular groove in the optical axis rotation direction. A notch is formed in which the projection can be just inserted, and penetrates the annular groove from the outer peripheral surface of the fixed cylinder, and one end in the optical axis rotation direction thereof coincides with one end around the optical axis of the annular groove, A first through hole is formed such that the other end in the direction around the optical axis matches one end of the rotation range, and penetrates the annular groove from the outer peripheral surface of the fixed cylinder, and the other end in the direction around the optical axis is formed. The end is aligned with the other end around the optical axis of the annular groove, A second through hole whose one end in the vertical direction coincides with the other end of the rotation range is formed, and is fitted into the first through hole and the second through hole of the fixed cylinder as the rotation range restricting member, respectively. There are a first rotation range regulating member and a second rotation range regulating member which are fitted into each other, and each of the rotation range regulating members is formed of one member having elasticity, and is just fitted into the through hole of the fixed cylinder. It has a fitting portion that extends into the annular groove, and a flange portion that restricts radial movement of the fitting portion so that the fitting portion does not slip out of the annular groove in a direction approaching the optical axis. And lens barrel.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6154779A JPH0821942A (en) | 1994-07-06 | 1994-07-06 | Lens barrel |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6154779A JPH0821942A (en) | 1994-07-06 | 1994-07-06 | Lens barrel |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0821942A true JPH0821942A (en) | 1996-01-23 |
Family
ID=15591719
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6154779A Pending JPH0821942A (en) | 1994-07-06 | 1994-07-06 | Lens barrel |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0821942A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007101853A (en) * | 2005-10-04 | 2007-04-19 | Matsushita Electric Ind Co Ltd | Lens barrel |
WO2018163754A1 (en) * | 2017-03-08 | 2018-09-13 | 株式会社ツーソー | Filter frame for camera and filter unit for camera |
US20220187693A1 (en) * | 2020-12-16 | 2022-06-16 | Iview Displays (Shenzhen) Company Ltd. | Lens focus adjustment assembly and projector |
WO2023103163A1 (en) * | 2021-12-08 | 2023-06-15 | 深圳市东正光学技术有限公司 | Lens rotation structure |
-
1994
- 1994-07-06 JP JP6154779A patent/JPH0821942A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007101853A (en) * | 2005-10-04 | 2007-04-19 | Matsushita Electric Ind Co Ltd | Lens barrel |
WO2018163754A1 (en) * | 2017-03-08 | 2018-09-13 | 株式会社ツーソー | Filter frame for camera and filter unit for camera |
US20220187693A1 (en) * | 2020-12-16 | 2022-06-16 | Iview Displays (Shenzhen) Company Ltd. | Lens focus adjustment assembly and projector |
WO2023103163A1 (en) * | 2021-12-08 | 2023-06-15 | 深圳市东正光学技术有限公司 | Lens rotation structure |
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