JP2005114877A

JP2005114877A - Lens-barrel

Info

Publication number: JP2005114877A
Application number: JP2003346445A
Authority: JP
Inventors: Takuji Hamazaki; 拓司浜崎; Makoto Iikawa; 誠飯川
Original assignee: Pentax Corp
Current assignee: Pentax Corp
Priority date: 2003-10-06
Filing date: 2003-10-06
Publication date: 2005-04-28

Abstract

PROBLEM TO BE SOLVED: To provide a lens-barrel of which the torque of a distance adjusting ring rotated by a motor is not transmitted to a manual operation ring, but the torque when manually rotating the manual operation ring can surely be transmitted to the distance adjusting ring, and moreover the manual operation ring can be smoothly operated to rotate. SOLUTION: The lens-barrel, wherein it is provided with the distance adjusting ring 210 for moving a transfer lens forward and backward in the direction of the optical axis by rotation, a manual operation ring for rotating the distance operation ring by manual rotary operation, a motor for rotating the distance adjusting ring, and a 1st unidirectional input-output rotation transmission mechanism U1 which transmits the torque of the manual operation ring to the distance adjusting ring but does not transmits the torque of the distance adjusting ring rotated by the motor to the manual operation ring, and wherein a 1st circumferential direction unequal width space forming part 214 is formed in such a form as a 1st torque transmission member 224 rotated in the circumferential direction bites into the space between a 1st circumferential direction unequal width space forming part 216 and a 1st rotation transmission cylindrical surface 210C and transmits the torque of the manual operation ring to the distance adjusting ring. COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、レンズ鏡筒に関する。 The present invention relates to a lens barrel.

オートフォーカス（ＡＦ）とマニュアルフォーカス（ＭＦ）のいずれによってもフォーカシングを行えるレンズ鏡筒としては、固定環と、この固定環と同心をなし、フォーカスレンズを保持する、光軸方向に進退可能な移動環と、上記固定環と同心をなし、その軸心回りに回転することにより移動環を光軸方向に進退させる距離調節環と、この距離調節環を回転させるＡＦ用モータと、その軸心回りに回転することにより距離調節環を回転させるマニュアルフォーカス環とを具備するものがある。 As a lens barrel that can be focused by either autofocus (AF) or manual focus (MF), a fixed ring and a concentric movement with this fixed ring, holding the focus lens, can move forward and backward in the optical axis direction. A ring, a distance adjusting ring that is concentric with the fixed ring and rotates around the axis thereof to move the moving ring back and forth in the optical axis direction, an AF motor that rotates the distance adjusting ring, and an axis around the axis And a manual focus ring that rotates the distance adjustment ring by rotating the distance adjustment ring.

このようなレンズ鏡筒の従来技術としては、例えば特許文献１及び特許文献２がある。
特開平２−２５３２１４号公報特開平２−２５３２１０号公報 As conventional techniques of such a lens barrel, there are, for example, Patent Document 1 and Patent Document 2.
JP-A-2-253214 JP-A-2-253210

しかし、特許文献１のレンズ鏡筒は、ＡＦ時に、モータの駆動力がマニュアルフォーカス環に伝達されるため、マニュアルフォーカス環が回転してしまう。このため、ＡＦ撮影時に撮影者の手がマニュアルフォーカス環に接触すると、ＡＦ動作が不円滑になってしまう。
一方、特許文献２のレンズ鏡筒は、ＡＦ時のモータからの駆動力がマニュアルフォーカス環に伝達されても、マニュアルフォーカス環は回転しないようになっているが、マニュアルフォーカス環が回らないように、マニュアルフォーカス環には常時トルクが掛けられているため、マニュアルフォーカス環を回転操作（ＭＦ操作）しにくかった。 However, in the lens barrel of Patent Document 1, since the driving force of the motor is transmitted to the manual focus ring during AF, the manual focus ring rotates. For this reason, if the photographer's hand touches the manual focus ring during AF shooting, the AF operation becomes unsmooth.
On the other hand, in the lens barrel of Patent Document 2, the manual focus ring does not rotate even if the driving force from the motor during AF is transmitted to the manual focus ring, but the manual focus ring does not rotate. Since the manual focus ring is always subjected to torque, it is difficult to rotate the manual focus ring (MF operation).

本発明の目的は、移動レンズを移動させるための距離調節環を、モータによる駆動力だけでなく手動操作環によっても回転させられるレンズ鏡筒において、モータによって回転させられた距離調節環の回転力は手動操作環に伝達しないが、手動操作環を手動で回転させたときの回転力は距離調節環に確実に伝達することができ、しかも手動操作環の回転操作を円滑に行えるレンズ鏡筒を提供することにある。 An object of the present invention is to provide a rotational force of a distance adjusting ring rotated by a motor in a lens barrel in which a distance adjusting ring for moving a moving lens is rotated not only by a driving force by a motor but also by a manual operation ring. Is not transmitted to the manual operation ring, but the rotational force when the manual operation ring is manually rotated can be reliably transmitted to the distance adjustment ring, and a lens barrel that can smoothly rotate the manual operation ring is provided. It is to provide.

本発明のレンズ鏡筒は、その軸心回りに回転することにより移動レンズを光軸方向に進退させる距離調節環と、手動の回転操作で該距離操作環を回転させる手動操作環と、上記距離調節環を回転させるモータと、上記手動操作環の回転力は上記距離調節環に伝達する一方、上記モータによって回転させられた上記距離調節環の回転力は上記手動操作環に伝達しない第１の一方向入出力回転伝達機構と、を備えるレンズ鏡筒において、上記第１の一方向入出力回転伝達機構が、上記手動操作環に設けられた、上記距離調節環と径方向に重合する環状重合部、及び該手動操作環の軸線に対して直交する第１の軸方向直交面と、上記距離調節環の内周面または外周面に形成した、上記手動操作環の上記環状重合部と対向する第１の回転伝達円筒面と、上記手動操作環の上記環状重合部に形成した、該第１の回転伝達円筒面との間に周方向で不等幅の第１の周方向不等幅空間を形成する第１の周方向不等幅空間形成部と、上記第１の周方向不等幅空間に挿入され、第１の付勢手段によって、常に上記第１の軸方向直交面に当接させられ、上記手動操作環の回転に連動して、上記第１の周方向不等幅空間形成部内を、該手動操作環の軸心回りに、該手動操作環に遅れながら同方向に公転する第１の差動回転部材と、上記第１の周方向不等幅空間に挿入され、該第１の差動回転部材に押されることにより、該第１の差動回転部材と同方向に公転する第１の回転力伝達部材と、を備え、上記第１の周方向不等幅空間形成部は、周方向に回転した上記第１の回転力伝達部材が、上記第１の周方向不等幅空間形成部と上記第１の回転伝達円筒面の間に食い込み、上記手動操作環の回転力を上記距離調節環に伝達する形状をなしていることを特徴としている。 The lens barrel according to the present invention includes a distance adjusting ring that rotates the moving lens in the optical axis direction by rotating around its axis, a manual operation ring that rotates the distance operation ring by a manual rotation operation, and the distance described above. The motor for rotating the adjustment ring and the rotational force of the manual operation ring are transmitted to the distance adjustment ring, while the rotational force of the distance adjustment ring rotated by the motor is not transmitted to the manual operation ring. In a lens barrel including a one-way input / output rotation transmission mechanism, the first one-way input / output rotation transmission mechanism is provided in the manual operation ring, and is circularly polymerized in a radial direction with the distance adjusting ring. And a first axially orthogonal plane orthogonal to the axis of the manual operation ring, and the annular overlapping portion of the manual operation ring formed on the inner peripheral surface or the outer peripheral surface of the distance adjustment ring A first rotation transmitting cylindrical surface; A first circumferentially non-uniform width forming a first circumferentially unequal width space having an unequal width in the circumferential direction between the circular rotation portion of the manual operation ring and the first rotation transmission cylindrical surface. Inserted into the equal width space forming portion and the first circumferential unequal width space, and always brought into contact with the first axially orthogonal plane by the first biasing means, the rotation of the manual operation ring In conjunction with the first differential rotation member that revolves in the first circumferential direction unequal width space forming portion around the axis of the manual operation ring in the same direction while being delayed from the manual operation ring, A first rotational force transmitting member that is inserted into the first circumferentially unequal width space and revolves in the same direction as the first differential rotating member by being pushed by the first differential rotating member; The first circumferential direction unequal width space forming portion is configured such that the first rotational force transmitting member rotated in the circumferential direction is the first circumferential direction unequal. Bite between the space forming portion and the first rotation transmission cylindrical surface, and a rotational force of the manual operation ring is characterized in that a shape for transferring to the distance adjustment ring.

上記第１の周方向不等幅空間に、一対の上記第１の回転力伝達部材を、上記第１の差動回転部材を挟むようにして、上記周方向に並べて挿入するのが実際的である。 It is practical to insert a pair of the first rotational force transmitting members side by side in the circumferential direction so as to sandwich the first differential rotating member in the first circumferential unequal width space.

さらに、上記第１の周方向不等幅空間形成部の少なくとも一部を、上記手動操作環の軸線方向を向き、周方向位置によって径方向の深さが異なる第１の不等幅溝によって構成することが可能である。 Further, at least a part of the first circumferentially unequal width space forming portion is configured by a first unequal width groove that faces the axial direction of the manual operation ring and has a radial depth that varies depending on a circumferential position. Is possible.

また、上記第１の軸方向直交面と対向するとともに平行をなす第１の押圧面を有し、上記第１の付勢手段によって、常に上記第１の軸方向直交面側に付勢され、上記第１の軸方向直交面との間に、上記第１の差動回転部材を挟持する第１の押圧部材を備えるのが好ましい。 In addition, the first pressing surface is opposed to and parallel to the first axial orthogonal surface, and is always urged to the first axial orthogonal surface side by the first urging means, It is preferable to provide a first pressing member that sandwiches the first differential rotating member between the first axially orthogonal plane.

さらに、上記第１の周方向不等幅空間形成部を、上記距離調節環の上記第１の回転伝達円筒面との間に、上記第１の周方向不等幅空間を複数形成するものとし、各第１の周方向不等幅空間に上記第１の差動回転部材と上記第１の回転力伝達部材を挿入するのが好ましい。 Furthermore, a plurality of the first circumferential unequal width spaces are formed between the first circumferential unequal width space forming portion and the first rotation transmission cylindrical surface of the distance adjusting ring. Preferably, the first differential rotating member and the first rotational force transmitting member are inserted into each first circumferential unequal width space.

上記第１の回転力伝達部材は、上記手動操作環の軸線と平行な方向を向く円柱状部材とするのが好ましい。 The first rotational force transmission member is preferably a columnar member that faces in a direction parallel to the axis of the manual operation ring.

さらに、上記距離調節環と上記モータの間に、上記モータの駆動力は距離調節環に伝達するが、上記距離調節環の回転力は上記モータに伝達しない第２の一方向入出力回転伝達機構を設けるのが好ましい。 Further, a second one-way input / output rotation transmission mechanism that transmits the driving force of the motor to the distance adjustment ring but does not transmit the rotational force of the distance adjustment ring to the motor between the distance adjustment ring and the motor. Is preferably provided.

上記第２の一方向入出力回転伝達機構は、上記光軸と平行な軸線に対して直交する第２の軸方向直交面を有し、上記モータによって回転駆動される入力回転軸と、この入力回転軸が相対回転自在に挿通され、その回転運動と距離調節環の回転運動とが連動する筒状出力回転軸と、上記入力回転軸に形成した、上記筒状出力回転軸内側の第２の回転伝達円筒面との間に周方向で不等幅の第２の周方向不等幅空間を形成する第２の周方向不等幅空間形成部と、該第２の周方向不等幅空間に挿入され、かつ第２の付勢手段によって常に上記第２の軸方向直交面に当接させられ、上記入力回転軸の回転に連動して、該入力回転軸の軸心を中心に該入力回転軸に遅れながら同方向に公転する複数の第２の差動回転部材と、上記第２の周方向不等幅空間に移動自在に挿入され、該第２の差動回転部材に押されることにより、該第２の差動回転部材と同方向に公転する第２の回転力伝達部材と、を備え、上記第２の周方向不等幅空間形成部は、周方向に回転した上記第２の回転力伝達部材が、上記入力回転軸の外周面と上記筒状出力回転軸の上記第２の回転伝達円筒面の間に食い込み、上記入力回転軸の回転力を上記筒状出力回転軸に伝達する形状をなしているのが実際的である。 The second one-way input / output rotation transmission mechanism has a second axially orthogonal plane orthogonal to an axis parallel to the optical axis, and an input rotary shaft that is rotationally driven by the motor. A rotating shaft is inserted in a relatively rotatable manner, a cylindrical output rotating shaft in which the rotating motion and the rotating motion of the distance adjusting ring are interlocked, and a second inside the cylindrical output rotating shaft formed on the input rotating shaft. A second circumferential unequal width space forming portion for forming a second circumferential unequal width space having an unequal width in the circumferential direction between the rotation transmission cylindrical surface and the second circumferential unequal width space; And is always brought into contact with the second axially orthogonal plane by the second urging means, and in conjunction with the rotation of the input rotation shaft, the input centering on the axis of the input rotation shaft A plurality of second differential rotation members that revolve in the same direction while being delayed from the rotation axis; and the second circumferentially unequal width space A second rotational force transmitting member that is movably inserted and revolves in the same direction as the second differential rotating member by being pushed by the second differential rotating member; In the circumferentially unequal width space forming portion, the second rotational force transmitting member rotated in the circumferential direction is between the outer peripheral surface of the input rotating shaft and the second rotational transmitting cylindrical surface of the cylindrical output rotating shaft. It is practical to have a shape that bites into the cylinder and transmits the rotational force of the input rotary shaft to the cylindrical output rotary shaft.

この場合は、上記第２の周方向不等幅空間形成部を、上記入力回転軸の半径方向に直交する少なくとも一つの面を備えた断面非円形部とすることが可能である。 In this case, the second circumferential unequal width space forming portion can be a non-circular section having at least one surface orthogonal to the radial direction of the input rotation shaft.

また、上記第２の一方向入出力回転伝達機構を、上記光軸と平行な軸線に対して直交する第２の軸方向直交面を有し、上記モータによって回転駆動される筒状入力回転軸と、この筒状入力回転軸に相対回転自在に挿通され、その外周面が第２の回転伝達円筒面をなし、その回転運動と距離調節環の回転運動とが連動する出力回転軸と、上記筒状入力回転軸の内周面に形成した、上記出力回転軸の上記第２の回転伝達円筒面との間に周方向で不等幅の第２の周方向不等幅空間を形成する第２の周方向不等幅空間形成部と、該第２の周方向不等幅空間に挿入され、かつ第２の付勢手段によって常に上記第２の軸方向直交面に当接させられ、上記筒状入力回転軸の回転に連動して、該筒状入力回転軸の軸心を中心に該筒状入力回転軸に遅れながら同方向に公転する複数の第２の差動回転部材と、上記第２の周方向不等幅空間に移動自在に挿入され、該第２の差動回転部材に押されることにより、該第２の差動回転部材と同方向に公転する第２の回転力伝達部材と、を備え、上記第２の周方向不等幅空間形成部は、周方向に回転した上記第２の回転力伝達部材が、上記筒状入力回転軸の内周面と上記出力回転軸の第２の回転伝達円筒面の間に食い込み、上記筒状入力回転軸の回転力を上記出力回転軸に伝達する形状をなすようにしてもよい。 Further, the second one-way input / output rotation transmission mechanism has a second axially orthogonal plane orthogonal to an axis parallel to the optical axis, and is a cylindrical input rotary shaft that is driven to rotate by the motor. And an output rotary shaft that is inserted into the cylindrical input rotary shaft so as to be relatively rotatable, an outer peripheral surface thereof forms a second rotation transmission cylindrical surface, and the rotary motion and the rotary motion of the distance adjusting ring are interlocked with each other, A second circumferentially unequal width space having an unequal width in the circumferential direction is formed between the output rotation shaft and the second rotation transmission cylindrical surface formed on the inner circumferential surface of the cylindrical input rotation shaft. Two circumferentially unequal width space forming portions, and inserted into the second circumferentially unequal width space, and always brought into contact with the second axially orthogonal plane by the second biasing means, In synchronization with the rotation of the cylindrical input rotary shaft, the center of the axis of the cylindrical input rotary shaft is delayed while being delayed from the cylindrical input rotary shaft. A plurality of second differential rotating members that revolve in the direction and the second differential rotating member are movably inserted into the second circumferentially unequal width space and pushed by the second differential rotating member, A second rotational force transmission member that revolves in the same direction as the differential rotational member, and the second circumferential unequal width space forming portion includes the second rotational force transmission member rotated in the circumferential direction. And a shape that bites between the inner peripheral surface of the cylindrical input rotary shaft and the second rotation transmission cylindrical surface of the output rotary shaft, and transmits the rotational force of the cylindrical input rotary shaft to the output rotary shaft. It may be.

第２の一方向入出力回転伝達機構をこれらのような構造とする場合は、上記第２の周方向不等幅空間に、一対の上記第２の回転力伝達部材を、上記第２の差動回転部材を挟むようにして、上記周方向に並べて挿入するのが実際的である。 When the second one-way input / output rotation transmission mechanism has such a structure, a pair of the second rotational force transmission members are disposed in the second circumferential unequal width space with the second difference. It is practical to insert side by side in the circumferential direction so as to sandwich the dynamic rotation member.

さらに、上記第２の周方向不等幅空間形成部を、上記筒状出力回転軸または上記出力回転軸の上記第２の回転伝達円筒面との間に、上記第２の周方向不等幅空間を複数形成するものとし、各第２の周方向不等幅空間に上記第２の差動回転部材と上記第２の回転力伝達部材を挿入するのが好ましい。 Further, the second circumferential unequal width space forming portion is disposed between the cylindrical output rotation shaft or the second rotation transmission cylindrical surface of the output rotation shaft. It is preferable that a plurality of spaces be formed, and the second differential rotating member and the second rotational force transmitting member be inserted into each second circumferential unequal width space.

また、上記第２の一方向入出力回転伝達機構を、上記光軸と平行な軸線に対して直交する第２の軸方向直交面を有し、上記モータによって回転駆動される入力回転軸と、この入力回転軸が相対回転自在に挿通され、その内周面が、上記入力回転軸の外周円との間に環状空間を形成する第２の回転伝達円筒面をなし、かつ、その回転運動と距離調節環の回転運動とが連動する筒状出力回転軸と、上記入力回転軸に形成した、上記第２の回転伝達円筒面との間に、上記環状空間の一部をなす周方向で不等幅の第２の周方向不等幅空間を形成する第２の周方向不等幅空間形成部と、該第２の周方向不等幅空間に挿入され、かつ第２の付勢手段によって常に上記第２の軸方向直交面に当接させられ、上記入力回転軸の回転に連動して、該入力回転軸の軸心を中心に該入力回転軸に遅れながら同方向に公転する複数の第２の差動回転部材と、上記環状空間に挿入され、該第２の差動回転部材に押圧されることにより、該第２の差動回転部材と同方向に公転するリテーナと、該リテーナに保持され、上記第２の周方向不等幅空間内を該リテーナと一緒に回転する第２の回転力伝達部材と、を備え、上記第２の周方向不等幅空間形成部は、周方向に回転した上記第２の回転力伝達部材が、上記入力回転軸の外周面と上記筒状出力回転軸の上記第２の回転伝達円筒面の間に食い込み、上記入力回転軸の回転力を上記筒状出力回転軸に伝達する形状をなすようにすることも可能である。 Further, the second one-way input / output rotation transmission mechanism has a second axially orthogonal surface orthogonal to an axis parallel to the optical axis, and an input rotary shaft that is rotationally driven by the motor; The input rotary shaft is inserted in a relatively rotatable manner, and the inner peripheral surface thereof forms a second rotation transmission cylindrical surface that forms an annular space with the outer peripheral circle of the input rotary shaft, and the rotational motion thereof A circumferential output that forms part of the annular space is not formed between the cylindrical output rotary shaft that is linked to the rotational movement of the distance adjusting ring and the second rotation transmission cylindrical surface that is formed on the input rotary shaft. A second circumferentially unequal width space forming part that forms a second circumferentially unequal width space of equal width; and a second biasing means inserted into the second circumferentially unequal width space and It is always brought into contact with the second axially orthogonal plane, and in conjunction with the rotation of the input rotation shaft, A plurality of second differential rotation members that revolve in the same direction while being delayed from the input rotation axis around the center, and are inserted into the annular space and pressed by the second differential rotation member, A retainer that revolves in the same direction as the second differential rotation member; a second rotational force transmission member that is held by the retainer and rotates together with the retainer in the second circumferentially unequal width space; And the second circumferentially unequal width space forming portion is configured such that the second rotational force transmitting member rotated in the circumferential direction includes an outer peripheral surface of the input rotary shaft and the second of the cylindrical output rotary shaft. It is also possible to form a shape that bites between the rotation transmission cylindrical surfaces and transmits the rotational force of the input rotation shaft to the cylindrical output rotation shaft.

さらに、上記第２の一方向入出力回転伝達機構を、上記光軸と平行な軸線に対して直交する第２の軸方向直交面を有し、上記モータによって回転駆動される筒状入力回転軸と、この筒状入力回転軸に相対回転自在に挿通され、その外周面が、上記筒状入力回転軸の内周面との間に環状空間を形成する第２の回転伝達円筒面をなし、かつ、その回転運動と距離調節環の回転運動とが連動する出力回転軸と、上記筒状入力回転軸の内周面に形成した、上記第２の回転伝達円筒面との間に、上記環状空間の一部をなす周方向で不等幅の第２の周方向不等幅空間を形成する第２の周方向不等幅空間形成部と、該第２の周方向不等幅空間に挿入され、かつ第２の付勢手段によって常に上記第２の軸方向直交面に当接させられ、上記筒状入力回転軸の回転に連動して、該筒状入力回転軸の軸心を中心に該筒状入力回転軸に遅れながら同方向に公転する複数の第２の差動回転部材と、上記環状空間に挿入され、該第２の差動回転部材に押圧されることにより、該第２の差動回転部材と同方向に公転するリテーナと、該リテーナに保持され、上記第２の周方向不等幅空間内を該リテーナと一緒に回転する第２の回転力伝達部材と、を備え、上記第２の周方向不等幅空間形成部は、周方向に回転した上記第２の回転力伝達部材が、上記筒状入力回転軸の内周面と上記出力回転軸の上記第２の回転伝達円筒面の間に食い込み、上記筒状入力回転軸の回転力を上記出力回転軸に伝達する形状をなしていてもよい。 Further, the second one-way input / output rotation transmission mechanism has a second axially orthogonal plane orthogonal to an axis parallel to the optical axis, and is a cylindrical input rotary shaft that is driven to rotate by the motor. And a second rotation transmission cylindrical surface that forms an annular space between the outer peripheral surface of the cylindrical input rotary shaft and the inner peripheral surface of the cylindrical input rotary shaft. In addition, between the output rotary shaft in which the rotary motion and the rotary motion of the distance adjusting ring are linked, and the second rotation transmission cylindrical surface formed on the inner peripheral surface of the cylindrical input rotary shaft, A second circumferential unequal width space forming portion for forming a second circumferential unequal width space having an unequal width in the circumferential direction forming a part of the space, and being inserted into the second circumferential unequal width space And is always brought into contact with the second axially orthogonal plane by the second urging means, and the rotation of the cylindrical input rotary shaft In conjunction, a plurality of second differential rotating members that revolve in the same direction while being delayed from the cylindrical input rotating shaft around the axial center of the cylindrical input rotating shaft, and inserted into the annular space, The retainer revolves in the same direction as the second differential rotation member by being pressed by the two differential rotation members, and is held by the retainer, and the retainer passes through the second circumferentially unequal width space. A second rotational force transmission member that rotates together with the second circumferential force unequal width space forming portion, wherein the second rotational force transmission member that rotates in the circumferential direction is connected to the cylindrical input. A shape may be used in which the rotational force of the cylindrical input rotation shaft is transmitted to the output rotation shaft by biting between the inner peripheral surface of the rotation shaft and the second rotation transmission cylindrical surface of the output rotation shaft.

さらに、上記第２の周方向不等幅空間形成部を、上記筒状入力回転軸または上記入力回転軸の軸線方向を向き、周方向位置によって径方向の深さが異なる第２の不等幅溝とすることも可能である。 Further, the second circumferential width unequal width space forming portion is directed to the cylindrical input rotation shaft or the axial direction of the input rotation shaft, and the second unequal width is different in radial depth depending on the circumferential position. It can also be a groove.

第２の一方向入出力回転伝達機構をいずれの構成とする場合にも、上記入力回転軸または上記筒状入力回転軸に、上記モータの出力ギヤと噛合する入力ギヤを設け、上記筒状出力回転軸または上記出力回転軸の回転停止時に、該モータを、該回転停止時の直前における回転方向とは逆方向に、該入力ギヤと該出力ギヤのバックラッシュより小さい回転角だけ回転させて、上記筒状出力回転軸または上記出力回転軸を回転させることなく、上記入力回転軸または上記筒状入力回転軸を、上記回転停止時の直前における回転方向とは逆方向に回転させるのが好ましい。 Regardless of the configuration of the second one-way input / output rotation transmission mechanism, the input rotation shaft or the cylindrical input rotation shaft is provided with an input gear that meshes with the output gear of the motor, and the cylindrical output When the rotation of the rotation shaft or the output rotation shaft is stopped, the motor is rotated in a direction opposite to the rotation direction immediately before the rotation stop by a rotation angle smaller than the backlash of the input gear and the output gear, It is preferable to rotate the input rotation shaft or the cylindrical input rotation shaft in a direction opposite to the rotation direction immediately before the rotation stop without rotating the cylindrical output rotation shaft or the output rotation shaft.

さらに、いずれの態様でも、上記第２の回転力伝達部材が、上記入力回転軸または上記筒状入力回転軸の軸線と平行な方向を向く略円柱形状をなしているのが好ましい。 Furthermore, in any aspect, it is preferable that the second rotational force transmission member has a substantially cylindrical shape facing a direction parallel to the axis of the input rotation shaft or the cylindrical input rotation shaft.

上記移動レンズをフォーカスレンズとし、上記モータをＡＦ用モータとし、上記手動操作環をマニュアルフォーカス環とすることにより、上記レンズ鏡筒をフォーカスレンズ鏡筒とすることが可能である。 The lens barrel can be a focus lens barrel by using the movable lens as a focus lens, the motor as an AF motor, and the manual operation ring as a manual focus ring.

また、上記移動レンズをズームレンズとし、上記モータをズーム用モータとし、上記手動操作環をズーム環とすることにより、上記レンズ鏡筒をズームレンズ鏡筒とすることが可能である。 The lens barrel can be a zoom lens barrel by using the moving lens as a zoom lens, the motor as a zoom motor, and the manual operation ring as a zoom ring.

本発明によると、移動レンズを移動させるための距離調節環を、モータによる駆動力だけでなく手動操作環によっても回転させられるレンズ鏡筒において、モータによって回転させられた距離調節環の回転力は手動操作環に伝達しないが、手動操作環を手動で回転させたときの回転力は距離調節環に確実に伝達することができ、しかも手動操作環の回転操作を円滑に行えるようになる。 According to the present invention, in the lens barrel in which the distance adjusting ring for moving the moving lens is rotated not only by the driving force by the motor but also by the manual operation ring, the rotational force of the distance adjusting ring rotated by the motor is Although not transmitted to the manual operation ring, the rotational force when the manual operation ring is manually rotated can be reliably transmitted to the distance adjustment ring, and the rotation operation of the manual operation ring can be performed smoothly.

図１から図５は、本発明を、撮影状態をオートフォーカス（ＡＦ）とマニュアルフォーカス（ＭＦ）とに切り替え可能なレンズ鏡筒２００に適用した第１の実施形態を示している。
まず、レンズ鏡筒２００の全体構成について説明する。 FIGS. 1 to 5 show a first embodiment in which the present invention is applied to a lens barrel 200 in which the photographing state can be switched between auto focus (AF) and manual focus (MF).
First, the overall configuration of the lens barrel 200 will be described.

本実施形態のレンズ鏡筒２００は、その後端部（図１の左側を「前方」、右側を「後方」とする。）に、図示を省略したカメラ本体に接続されるバヨネット部２０１ａが形成された第１固定環２０１と、その内周側に位置する第２固定環２０２とを具備しており、第１固定環２０１と第２固定環２０２の後端部同士は固定ねじ２０３により固定されている。第２固定環２０２には前後方向を向く直進案内溝２０２ａが、周方向に等角度間隔で３本設けられており、第１固定環２０１と第２固定環２０２の間には正面視環状の配設空間Ｓが形成されている。
第１固定環２０１の後部壁２０１ｂにはモータＭが埋設されており、その回転軸Ｍ１とピニオン（出力ギヤ）Ｐが、配設空間Ｓ内に突出している。 In the lens barrel 200 of the present embodiment, a bayonet portion 201a connected to the camera body (not shown) is formed at the rear end portion (the left side in FIG. 1 is “front” and the right side is “rear”). The first fixed ring 201 and the second fixed ring 202 located on the inner peripheral side thereof are provided, and the rear ends of the first fixed ring 201 and the second fixed ring 202 are fixed by a fixing screw 203. ing. The second fixed ring 202 is provided with three rectilinear guide grooves 202a facing in the front-rear direction at equal angular intervals in the circumferential direction. Between the first fixed ring 201 and the second fixed ring 202, a circular shape in front view is provided. An arrangement space S is formed.
A motor M is embedded in the rear wall 201b of the first fixed ring 201, and the rotation shaft M1 and a pinion (output gear) P project into the arrangement space S.

第２固定環２０２の内周面の前端部には、固定レンズＬ１を保持するレンズ保持環２０４の後端部が、固定ねじ２０６により固定されている。
第１固定環２０１の前端部とレンズ保持環２０４の間に形成された環状空間には、第１固定環２０１と同心をなすマニュアルフォーカス環（手動操作環）２０８が、光軸Ｏ回りに回転自在かつ光軸Ｏ方向に移動不能として配設されている。
さらに配設空間Ｓには、距離調節環２１０が、光軸Ｏ回りに回転自在かつ光軸Ｏ方向に移動不能として配設されている。距離調節環２１０の後端部の内周面全体には、モータＭのピニオンＰと噛合する入力ギヤ２１０ａが形成されている。距離調節環２１０には、上記直進案内溝２０２ａに対して傾斜するカム溝２１０ｂが、周方向に等角度で３本設けられており、距離調節環２１０の前端部の内周面（第１の回転伝達円筒面）２１０ｃは正面視円形をなしている。
第２固定環２０２の内周側には、フォーカスレンズ（移動レンズ）Ｌ２を保持する移動環２１１が配設されており、移動環２１１の外周面には、周方向に等角度間隔で３本の径方向突起２１１ａが突設されている。各径方向突起２１１ａの先端面には、固定ねじ２１１ｃを介してローラ２１１ｄが取り付けられている。各ローラ２１１ｄは、対応する直進案内溝２０２ａとカム溝２１０ｂの重合部にそれぞれ嵌合しており、モータＭが回転して距離調節環２１０が正逆両方向に回転すると、フォーカスレンズＬ２（移動環２１１）は、直進案内溝２０２ａに沿って前後方向に進退する。 A rear end portion of the lens holding ring 204 that holds the fixed lens L 1 is fixed to a front end portion of the inner peripheral surface of the second fixed ring 202 by a fixing screw 206.
A manual focus ring (manual operation ring) 208 concentric with the first fixed ring 201 rotates around the optical axis O in an annular space formed between the front end portion of the first fixed ring 201 and the lens holding ring 204. It is arranged so as to be freely movable in the direction of the optical axis O.
Further, in the arrangement space S, a distance adjusting ring 210 is arranged so as to be rotatable around the optical axis O and not movable in the direction of the optical axis O. An input gear 210 a that meshes with the pinion P of the motor M is formed on the entire inner peripheral surface of the rear end portion of the distance adjusting ring 210. The distance adjusting ring 210 is provided with three cam grooves 210b inclined at an equal angle in the circumferential direction with respect to the linear guide groove 202a. (Rotation transmission cylindrical surface) 210c is circular in front view.
A moving ring 211 for holding a focus lens (moving lens) L2 is disposed on the inner peripheral side of the second fixed ring 202. Three moving rings 211 are arranged at equal angular intervals in the circumferential direction on the outer peripheral surface of the moving ring 211. The radial projection 211a is projected. A roller 211d is attached to the distal end surface of each radial protrusion 211a via a fixing screw 211c. Each roller 211d is fitted in the overlap portion of the corresponding straight guide groove 202a and cam groove 210b, and when the motor M rotates and the distance adjusting ring 210 rotates in both forward and reverse directions, the focus lens L2 (moving ring) 211) moves forward and backward along the straight guide groove 202a.

マニュアルフォーカス環２０８の内周面には径方向内向きの環状壁２０８ａが突設されており、この環状壁２０８ａの内周側端部の全体からは、後方を向く環状突条（環状重合部）２０８ｂが延出している。
図２に示すように、環状突条２０８ｂの外周面には、周方向に等角度間隔で４つの収納凹部２１２が形成されている。この収納凹部２１２の底面は、周方向位置によってその深さが異なる一対の不等幅溝（第１の周方向不等幅空間形成部）（第１の不等幅溝）２１４、２１４と、両不等幅溝２１４の間に形成された扁平部（第１の周方向不等幅空間形成部）２１６とによって構成されており、図３に示すように、その前面が、光軸Ｏに対して直交する軸方向直交面（第１の軸方向直交面）２１２ａとなっている。そして、両不等幅溝２１４及び扁平部２１６と、距離調節環２１０の内周面２１０ｃとの間には、周方向位置によって形状が異なる収納空間（第１の周方向不等幅空間）ＳＳが形成されている。
図２から図５に示すように、扁平部２１６と距離調節環２１０の内周面２１０ｃの間には、その中心軸（回転軸）ＣＡ１がマニュアルフォーカス環２０８の径方向を向く差動コロ（第１の差動回転部材）２１８が配設されている。そして、図３に示すように、第２固定環２０２の前端面と環状突条２０８ｂの後端部間に形成された環状の空間には、正面視で環状をなす環状部材（第１の押圧部材）２２０と、該環状部材２２０と第２固定環２０２の前端面との間に位置する正面視環状の板バネ（第１の付勢手段）２２２とが配設されている。この板バネ２２２の付勢力によって、環状部材２２０の押圧面（第１の押圧面）２２０ａは、常に各差動コロ２１８の後面に接触して各差動コロ２１８を前方に付勢しており、各差動コロ２１８の前面を収納凹部２１２の軸方向直交面２１２ａに当接させている。 A radially inward annular wall 208a protrudes from the inner peripheral surface of the manual focus ring 208. An annular ridge (annular overlapping portion) facing rearward is formed from the entire inner peripheral end of the annular wall 208a. ) 208b is extended.
As shown in FIG. 2, four storage recesses 212 are formed on the outer peripheral surface of the annular ridge 208b at equal angular intervals in the circumferential direction. The bottom surface of the storage recess 212 has a pair of unequal width grooves (first circumferential unequal width space forming portions) (first unequal width grooves) 214, 214 having different depths depending on circumferential positions. 3 and a flat portion (first circumferential unequal width space forming portion) 216 formed between the unequal width grooves 214, and the front surface thereof is on the optical axis O as shown in FIG. It is an axially orthogonal surface (first axially orthogonal surface) 212a that is orthogonal to the surface. A storage space (first circumferential unequal width space) SS having a different shape depending on the circumferential position between the unequal width grooves 214 and the flat portion 216 and the inner peripheral surface 210c of the distance adjusting ring 210 is provided. Is formed.
As shown in FIGS. 2 to 5, a differential roller (with a central axis (rotating axis) CA 1 facing the radial direction of the manual focus ring 208) is formed between the flat portion 216 and the inner peripheral surface 210 c of the distance adjusting ring 210. A first differential rotating member 218 is disposed. Then, as shown in FIG. 3, an annular space formed between the front end face of the second fixed ring 202 and the rear end portion of the annular protrusion 208b has an annular member (first pressing Member) 220 and an annular leaf spring (first urging means) 222 located between the annular member 220 and the front end face of the second fixed ring 202 in a front view. Due to the biasing force of the leaf spring 222, the pressing surface (first pressing surface) 220a of the annular member 220 is always in contact with the rear surface of each differential roller 218 and biases each differential roller 218 forward. The front surface of each differential roller 218 is in contact with the axially orthogonal surface 212a of the storage recess 212.

さらに、各収納凹部２１２（収納空間ＳＳ）には、差動コロ２１８を挟むようにして、その中心軸（回転軸）ＣＡ２（図３参照）が光軸Ｏと平行な方向を向く一対の食付コロ（第１の回転力伝達部材）２２４が配設されている。各食付コロ２２４の外周面は、各不等幅溝２１４と距離調節環２１０の内周面２１０ｃとに、回転自在に接触している。 Further, in each storage recess 212 (storage space SS), a pair of eating rollers whose center axis (rotation axis) CA2 (see FIG. 3) faces a direction parallel to the optical axis O with the differential roller 218 interposed therebetween. (First rotational force transmission member) 224 is provided. The outer peripheral surface of each eating roller 224 is in contact with each unequal width groove 214 and the inner peripheral surface 210c of the distance adjusting ring 210 so as to be freely rotatable.

図１に示すように、レンズ保持環２０４とマニュアルフォーカス環２０８の環状壁２０８ａの間に形成された、正面視で環状をなす空間には、環状保持部材２２６が光軸Ｏ回りに回転自在に配設されている。この環状保持部材２２６に周方向に並べて複数の保持孔２２６ａが穿設されており、各保持孔２２６ａにはベアリングボール２２８が回転自在に保持されており、各ベアリングボール２２８が、環状壁２０８ａの前面とレンズ保持環２０４とに回転可能に接触している。
そして、マニュアルフォーカス環２０８の環状突条２０８ｂ、距離調節環２１０の内周面２１０ｃ、収納凹部２１２（軸方向直交面２１２ａ、不等幅溝２１４、扁平部２１６）、差動コロ２１８、環状部材２２０、板バネ２２２、及び食付コロ２２４によって一方向入出力回転伝達機構（第１の一方向入出力回転伝達機構）Ｕ１が構成されている。
さらに、図示は省略してあるが、レンズ鏡筒２００には、ＡＦ撮影を可能または不能にするＡＦスイッチが設けられている。 As shown in FIG. 1, an annular holding member 226 is rotatable around the optical axis O in a space formed between the lens holding ring 204 and the annular wall 208a of the manual focus ring 208. It is arranged. A plurality of holding holes 226a are formed in the annular holding member 226 in the circumferential direction. Bearing balls 228 are rotatably held in the holding holes 226a, and each bearing ball 228 is attached to the annular wall 208a. The front surface and the lens holding ring 204 are rotatably contacted.
Then, the annular protrusion 208b of the manual focus ring 208, the inner peripheral surface 210c of the distance adjusting ring 210, the housing recess 212 (the axial orthogonal surface 212a, the unequal width groove 214, the flat portion 216), the differential roller 218, the annular member The one-way input / output rotation transmission mechanism (first one-way input / output rotation transmission mechanism) U1 is configured by 220, the leaf spring 222, and the eating roller 224.
Further, although not shown, the lens barrel 200 is provided with an AF switch that enables or disables AF shooting.

次に、以上のような構成からなるレンズ鏡筒２００の動作について説明する。
まず、ＭＦによりフォーカシングを行う場合のレンズ鏡筒２００の動作について説明する。 Next, the operation of the lens barrel 200 configured as described above will be described.
First, the operation of the lens barrel 200 when focusing by MF will be described.

先ず、上記ＡＦスイッチをＯＦＦにしておき、ＡＦ用モータＭが回転しないようにしておく。この状態で、撮影者が手でマニュアルフォーカス環２０８を正面視で反時計方向に回転させると、環状部材２２０の押圧面２２０ａと軸方向直交面２１２ａとによって挟持されている各差動コロ２１８が各収納凹部２１２内を、中心軸ＣＡ１回りに自転しながら光軸Ｏ回りにマニュアルフォーカス環２０８と同方向（反時計方向）に公転（回転）する。この際、各差動コロ２１８と、押圧面２２０ａ及び軸方向直交面２１２ａとの間に滑りが生じないとすると、各差動コロ２１８の回転速度はマニュアルフォーカス環２０８の１／２となる。その結果、図５に示すように、各差動コロ２１８はマニュアルフォーカス環２０８に対して正面視で時計方向に相対回転することになる。このため、各差動コロ２１８は、正面視で時計方向側に位置している食付コロ２２４に接触し、この食付コロ２２４に時計方向の回転力を与える。回転力を与えられた食付コロ２２４は、各収納空間ＳＳ内を時計方向に回転し、各収納空間ＳＳの径方向幅が狭くなっている時計方向側の端部において、不等幅溝２１４と距離調節環２１０の内周面２１０ｃとの間に強い力で食い込む。この結果、マニュアルフォーカス環２０８と距離調節環２１０が食付コロ２２４を介して周方向に一体となるので、マニュアルフォーカス環２０８の回転力が距離調節環２１０に伝わり、距離調節環２１０が反時計方向に回転する。距離調節環２１０が反時計方向に回転すると、フォーカスレンズＬ２が光軸Ｏに沿って前方に移動する。 First, the AF switch is turned off so that the AF motor M does not rotate. In this state, when the photographer manually rotates the manual focus ring 208 counterclockwise when viewed from the front, each differential roller 218 sandwiched between the pressing surface 220a of the annular member 220 and the axially orthogonal surface 212a is Each storage recess 212 revolves (rotates) around the optical axis O in the same direction (counterclockwise) as the manual focus ring 208 while rotating around the central axis CA1. At this time, if no slip occurs between each differential roller 218 and the pressing surface 220a and the axially orthogonal surface 212a, the rotational speed of each differential roller 218 is ½ of the manual focus ring 208. As a result, as shown in FIG. 5, each differential roller 218 rotates relative to the manual focus ring 208 in the clockwise direction in front view. For this reason, each differential roller 218 comes into contact with the biting roller 224 positioned in the clockwise direction when viewed from the front, and applies a clockwise rotational force to the biting roller 224. The eating roller 224 to which the rotational force is applied rotates clockwise in each storage space SS, and the unequal width groove 214 is formed at the end portion on the clockwise side where the radial width of each storage space SS is narrow. And the inner peripheral surface 210c of the distance adjusting ring 210 are bitten with a strong force. As a result, the manual focus ring 208 and the distance adjustment ring 210 are integrated in the circumferential direction via the eating roller 224, so that the rotational force of the manual focus ring 208 is transmitted to the distance adjustment ring 210, and the distance adjustment ring 210 is counterclockwise. Rotate in the direction. When the distance adjustment ring 210 rotates counterclockwise, the focus lens L2 moves forward along the optical axis O.

一方、マニュアルフォーカス環２０８を正面視で時計方向に回転させると、環状部材２２０の押圧面２２０ａと軸方向直交面２１２ａとによって挟持されている各差動コロ２１８が各収納凹部２１２内を、中心軸ＣＡ１回りに自転しながら光軸Ｏ回りにマニュアルフォーカス環２０８と同方向（時計方向）に公転（回転）する。この際、各差動コロ２１８と、押圧面２２０ａ及び軸方向直交面２１２ａとの間に滑りが生じないとすると、各差動コロ２１８の回転速度はマニュアルフォーカス環２０８の１／２となる。その結果、各差動コロ２１８はマニュアルフォーカス環２０８に対して正面視で反時計方向に相対回転することになる。このため、各差動コロ２１８は、正面視で反時計方向側に位置している食付コロ２２４に接触し、この食付コロ２２４に反時計方向の回転力を与える。回転力を与えられた食付コロ２２４は、各収納空間ＳＳ内を反時計方向に回転し、各収納空間ＳＳの径方向幅が狭くなっている反時計方向側の端部において、不等幅溝２１４と距離調節環２１０の内周面２１０ｃとの間に強い力で食い込む。この結果、マニュアルフォーカス環２０８と距離調節環２１０が食付コロ２２４を介して周方向に一体となり、距離調節環２１０が時計方向に回転する。距離調節環２１０が時計方向に回転すると、フォーカスレンズＬ２が光軸Ｏに沿って後方に移動する。 On the other hand, when the manual focus ring 208 is rotated clockwise in a front view, each differential roller 218 held between the pressing surface 220a of the annular member 220 and the axially orthogonal surface 212a is centered in each storage recess 212. While rotating around the axis CA1, it revolves (rotates) around the optical axis O in the same direction (clockwise) as the manual focus ring 208. At this time, if no slip occurs between each differential roller 218 and the pressing surface 220a and the axially orthogonal surface 212a, the rotational speed of each differential roller 218 is ½ of the manual focus ring 208. As a result, each differential roller 218 rotates relative to the manual focus ring 208 counterclockwise in front view. For this reason, each differential roller 218 comes into contact with the biting roller 224 located on the counterclockwise side when viewed from the front, and applies a counterclockwise rotational force to the biting roller 224. The eating roller 224 given the rotational force rotates counterclockwise in each storage space SS, and has an unequal width at the counterclockwise end where the radial width of each storage space SS is narrow. It bites in with a strong force between the groove 214 and the inner peripheral surface 210c of the distance adjusting ring 210. As a result, the manual focus ring 208 and the distance adjustment ring 210 are integrated in the circumferential direction via the eating roller 224, and the distance adjustment ring 210 rotates in the clockwise direction. When the distance adjusting ring 210 rotates in the clockwise direction, the focus lens L2 moves rearward along the optical axis O.

次に、ＡＦによりフォーカシングを行う場合の動作について説明する。
この場合は上記ＡＦスイッチをＯＮにして、ＡＦ撮影を可能な状態にしておく。
カメラ本体内に設けられた制御回路（図示略）がＡＦ用モータＭに正転信号を送り、ＡＦ用モータＭを正転させると、その回転力がピニオンＰ及び入力ギヤ２１０ａを介して距離調節環２１０に伝達され、距離調節環２１０が正面視で反時計方向に回転し、フォーカスレンズＬ２が光軸Ｏに沿って前方に移動する。
そして、このように距離調節環２１０が回転しても、距離調節環２１０の前端部の内周面２１０ｃは正面視円形をなしているので、距離調節環２１０から差動コロ２１８には回転力は伝達されず、図４に示すように、食付コロ２２４は周方向に移動しない。このため、マニュアルフォーカス環２０８は回転しない。 Next, the operation when focusing by AF will be described.
In this case, the AF switch is turned on to enable AF shooting.
When a control circuit (not shown) provided in the camera body sends a forward rotation signal to the AF motor M and causes the AF motor M to rotate forward, the rotational force is adjusted via the pinion P and the input gear 210a. The distance adjustment ring 210 is transmitted counterclockwise when viewed from the front, and the focus lens L2 moves forward along the optical axis O.
Even if the distance adjusting ring 210 rotates in this way, the inner peripheral surface 210c of the front end portion of the distance adjusting ring 210 is circular in front view, so that the rotational force is applied from the distance adjusting ring 210 to the differential roller 218. As shown in FIG. 4, the biting roller 224 does not move in the circumferential direction. For this reason, the manual focus ring 208 does not rotate.

一方、制御回路がＡＦ用モータＭに逆転信号を送ってＡＦ用モータＭを逆転させると、その回転力がピニオンＰ及び入力ギヤ２１０ａを介して距離調節環２１０に伝達され、距離調節環２１０が正面視で時計方向に回転し、フォーカスレンズＬ２が光軸Ｏに沿って後方に移動する。
この場合も、距離調節環２１０が回転しても、距離調節環２１０の前端部の内周面２１０ｃは正面視円形をなしているので、距離調節環２１０から差動コロ２１８には回転力は伝達されず、食付コロ２２４が周方向に移動しないので、マニュアルフォーカス環２０８は回転しない。
そして、このように、制御回路がＡＦ用モータＭを正逆両方向へ回転させて、フォーカスレンズＬ２を前後に移動させることによりＡＦが行われる。 On the other hand, when the control circuit sends a reverse rotation signal to the AF motor M to reverse the AF motor M, the rotational force is transmitted to the distance adjusting ring 210 via the pinion P and the input gear 210a, and the distance adjusting ring 210 is The lens rotates clockwise in front view, and the focus lens L2 moves rearward along the optical axis O.
In this case as well, even if the distance adjusting ring 210 rotates, the inner peripheral surface 210c of the front end portion of the distance adjusting ring 210 has a circular shape when viewed from the front, so that the rotational force is applied from the distance adjusting ring 210 to the differential roller 218. The manual focus ring 208 does not rotate because the biting roller 224 does not move in the circumferential direction.
Thus, AF is performed by the control circuit rotating the AF motor M in both forward and reverse directions and moving the focus lens L2 back and forth.

以上説明した本実施形態のレンズ鏡筒２００によれば、ＡＦスイッチをＯＦＦにすることによりＭＦを行うことでき、ＡＦスイッチをＯＮにすればＡＦ撮影ができ、しかもＡＦ撮影時にマニュアルフォーカス環２０８が回転しないので、撮影者の手がマニュアルフォーカス環２０８に触れていてもＡＦ操作を円滑に行なえる。しかも、マニュアルフォーカス環２０８には回転抵抗となるトルクが掛けられていないので、マニュアルフォーカス環２０８によるＭＦ操作を円滑に行える。 According to the lens barrel 200 of the present embodiment described above, MF can be performed by turning off the AF switch, AF shooting can be performed by turning on the AF switch, and the manual focus ring 208 can be used during AF shooting. Since it does not rotate, the AF operation can be performed smoothly even when the photographer's hand touches the manual focus ring 208. In addition, since the manual focus ring 208 is not applied with torque that serves as rotational resistance, the MF operation by the manual focus ring 208 can be performed smoothly.

さらに、第１の一方向入出力回転伝達機構Ｕ１が、マニュアルフォーカス環２０８に遅れながら差動コロ２１８を同方向に公転（回転）させ、この差動コロ２１８によって食付コロ２２４をマニュアルフォーカス環２０８と距離調節環２１０の間に強固に食い込ませ、この食付コロ２２４を回転力伝達部材として機能させる構造なので、マニュアルフォーカス環２０８から距離調節環２１０へのトルク伝達を確実に行うことができ、その結果、ＭＦ撮影を確実に行うことができる。 Further, the first one-way input / output rotation transmission mechanism U1 revolves (rotates) the differential roller 218 in the same direction while being delayed from the manual focus ring 208, and the differential roller 218 causes the eating roller 224 to move to the manual focus ring. Since the biting roller 224 functions as a rotational force transmitting member by firmly biting between 208 and the distance adjusting ring 210, torque transmission from the manual focus ring 208 to the distance adjusting ring 210 can be reliably performed. As a result, MF photography can be performed reliably.

しかも、第１の回転力伝達部材である食付コロ２２４は、光軸Ｏと平行な中心軸ＣＡ２を有する円柱状部材なので、第１の回転力伝達部材を球状部材とした場合に比べて、マニュアルフォーカス環２０８及び距離調節環２１０との接触面積が大きい。このため、本実施形態の一方向入出力回転伝達機構Ｕ１は、第１の回転力伝達部材を球状とした場合に比べて、マニュアルフォーカス環２０８から距離調節環２１０への回転トルクの伝達効率が良い。 Moreover, the eating roller 224, which is the first rotational force transmission member, is a cylindrical member having a central axis CA2 parallel to the optical axis O. Therefore, compared to the case where the first rotational force transmission member is a spherical member, The contact area with the manual focus ring 208 and the distance adjustment ring 210 is large. For this reason, the unidirectional input / output rotation transmission mechanism U1 of this embodiment has a rotational torque transmission efficiency from the manual focus ring 208 to the distance adjustment ring 210 as compared with the case where the first rotational force transmission member is spherical. good.

次に、本発明の第２の実施形態について、主に図６から図８を用いて説明する。なお、第１の実施形態と同じ部材には同じ符号を付すに止めて、その詳細な説明は省略する。
本実施形態のレンズ鏡筒３００の全体構成は第１の実施形態のレンズ鏡筒２００とほぼ同じであるが、距離調節環３０２の形状が第１の実施形態の距離調節環２１０とはやや異なり、さらに、配設空間Ｓには、ピニオンＰと距離調節環３０２とを連係するための一方向入出力回転伝達機構（第２の一方向入出力回転伝達機構）Ｕ２が配設されている。
以下、これらの相違点について詳細に説明する。 Next, a second embodiment of the present invention will be described mainly with reference to FIGS. The same members as those in the first embodiment are designated by the same reference numerals, and detailed description thereof is omitted.
The overall configuration of the lens barrel 300 of this embodiment is substantially the same as that of the lens barrel 200 of the first embodiment, but the shape of the distance adjustment ring 302 is slightly different from the distance adjustment ring 210 of the first embodiment. Furthermore, in the arrangement space S, a one-way input / output rotation transmission mechanism (second one-way input / output rotation transmission mechanism) U2 for linking the pinion P and the distance adjusting ring 302 is provided.
Hereinafter, these differences will be described in detail.

本実施形態の距離調節環３０２は第１の実施形態の距離調節環２１０より前後長が短く、その後端と第１固定環２０１の後部壁２０１ｂとの間の前後方向距離が第１の実施形態に比べて長くなっている。本実施形態の距離調節環３０２にも、距離調節環２１０と同様の入力ギヤ３０２ａ、カム溝３０２ｂが形成されており、その前端部の内周面（第１の回転伝達円筒面）３０２ｃは正面視円形をなしている。 The distance adjustment ring 302 of the present embodiment has a shorter front-rear length than the distance adjustment ring 210 of the first embodiment, and the distance in the front-rear direction between the rear end and the rear wall 201b of the first fixed ring 201 is the first embodiment. It is longer than The distance adjustment ring 302 of the present embodiment is also formed with the same input gear 302a and cam groove 302b as the distance adjustment ring 210, and the inner peripheral surface (first rotation transmission cylindrical surface) 302c at the front end thereof is the front surface. It has a circular shape.

次に、一方向入出力回転伝達機構Ｕ２の構造について、主に図７と図８を用いながら詳しく説明する。 Next, the structure of the one-way input / output rotation transmission mechanism U2 will be described in detail with reference mainly to FIGS.

前端が閉塞され、後端が開放された筒状のハウジング３は、その後端に環状フランジ３ａを具備しており、この環状フランジ３ａが、ねじ（図示略）によって第１固定環２０１に固定されている。ハウジング３の前壁３ｂの後面の中心部には、円形板３ｃが固着されており、この円形板３ｃの後面には、ハウジング３と同軸の回転軸５の前端面が固着されている。この回転軸５は、前部の小径部５ａと後部の大径部５ｂとからなる。回転軸５の軸線方向は光軸Ｏと平行をなしている。 The cylindrical housing 3 whose front end is closed and whose rear end is open has an annular flange 3a at the rear end, and this annular flange 3a is fixed to the first fixed ring 201 by a screw (not shown). ing. A circular plate 3c is fixed to the center of the rear surface of the front wall 3b of the housing 3, and a front end surface of the rotary shaft 5 coaxial with the housing 3 is fixed to the rear surface of the circular plate 3c. The rotary shaft 5 includes a front small diameter portion 5a and a rear large diameter portion 5b. The axial direction of the rotating shaft 5 is parallel to the optical axis O.

大径部５ｂには、筒状をなす入力回転軸７の中心孔７ａが回転自在に嵌合している。図７に示すように、この入力回転軸７は、後方に向かうにつれて、その径が３段階で大きくなっており、最も後方に位置する最大径部７ｂと、中間部に位置する中間径部７ｃと、最も前方に位置する最小径部（第２の周方向不等幅空間形成部）（断面非円形部）７ｄとを具備し、中間径部７ｃの前面は正面視（軸方向からみたとき）環状の軸方向直交面（第２の軸方向直交面）７ｃ１となっている。最大径部７ｂと中間径部７ｃの断面形状は円形であるが、図８に示すように、最小径部７ｄの断面形状は略正方形である。最大径部７ｂの外周には、入力ギヤ７ｅが形成されている。 A center hole 7a of a cylindrical input rotation shaft 7 is rotatably fitted to the large diameter portion 5b. As shown in FIG. 7, the diameter of the input rotation shaft 7 increases in three stages as it goes rearward. The maximum diameter portion 7b located at the rearmost position and the intermediate diameter portion 7c located at the middle position. And the smallest diameter portion (second circumferentially unequal width space forming portion) 7d (a non-circular cross-sectional portion) positioned forward, and the front surface of the intermediate diameter portion 7c is viewed from the front (when viewed from the axial direction). ) An annular axial orthogonal surface (second axial orthogonal surface) 7c1. Although the cross-sectional shapes of the maximum diameter portion 7b and the intermediate diameter portion 7c are circular, as shown in FIG. 8, the cross-sectional shape of the minimum diameter portion 7d is substantially square. An input gear 7e is formed on the outer periphery of the maximum diameter portion 7b.

この入力回転軸７は、入力ギヤ７ｅより前方に位置する部分がハウジング３の内部に収納されている。入力回転軸７の後端面の中心部には環状凹部７ｆが形成されており、この環状凹部７ｆには、複数の金属製のベアリングボール（スチールボール）９が周方向に並んだ状態で配設されている。回転軸５の後端面には、その径が環状凹部７ｆとほぼ同一の円形の抜け止め板１１が固定ねじ１３によって固着されており、各ベアリングボール９が抜け止め板１１に当接することにより、入力回転軸７のそれ以上の後方移動が規制されている。
さらに、ハウジング３の環状フランジ３ａには、上述したＡＦ用モータＭ取り付けられており、該ＡＦ用モータＭの回転軸Ｍ１に固着されたピニオンＰが、入力回転軸７の入力ギヤ７ｅと噛合している。 The input rotary shaft 7 is housed in the housing 3 at a portion positioned in front of the input gear 7e. An annular recess 7f is formed at the center of the rear end surface of the input rotary shaft 7, and a plurality of metal bearing balls (steel balls) 9 are arranged in the annular recess 7f in a circumferential direction. Has been. A circular retaining plate 11 having a diameter substantially the same as that of the annular recess 7f is fixed to the rear end surface of the rotary shaft 5 by a fixing screw 13, and each bearing ball 9 abuts against the retaining plate 11, Further rearward movement of the input rotating shaft 7 is restricted.
Further, the above-described AF motor M is attached to the annular flange 3a of the housing 3, and the pinion P fixed to the rotation shaft M1 of the AF motor M meshes with the input gear 7e of the input rotation shaft 7. ing.

ハウジング３の内部には、前端及び後端がともに開放された筒状の筒状出力回転軸１５が、回転軸５を中心に回転可能として配設されている。この筒状出力回転軸１５は、後方に向かうに連れて２段階にその径が拡大するものである。筒状出力回転軸１５の後部をなす大径筒状部１５ａの後端部は、ハウジング３の内周面と、入力回転軸７の中間径部７ｃとの間に回転可能として嵌合しており、筒状出力回転軸１５の前部をなす小径筒状部１５ｂの前端部は、円形板３ｃに回転可能として嵌合している。小径筒状部１５ｂの外周面全体には出力ギヤ１５ｃが設けられており、この出力ギヤ１５ｃは、ハウジング３の前端部に形成された窓孔３ｄを介してハウジング３の外部に露出しており、図６に示すように、この出力ギヤ１５ｃは距離調節環３０２の入力ギヤ３０２ａと噛合している。 Inside the housing 3, a cylindrical cylindrical output rotation shaft 15 having both the front end and the rear end opened is disposed so as to be rotatable about the rotation shaft 5. The cylindrical output rotating shaft 15 has a diameter that increases in two stages as it goes rearward. The rear end portion of the large-diameter cylindrical portion 15a that forms the rear portion of the cylindrical output rotation shaft 15 is fitted between the inner peripheral surface of the housing 3 and the intermediate diameter portion 7c of the input rotation shaft 7 so as to be rotatable. The front end portion of the small-diameter cylindrical portion 15b that forms the front portion of the cylindrical output rotating shaft 15 is fitted to the circular plate 3c so as to be rotatable. An output gear 15c is provided on the entire outer peripheral surface of the small diameter cylindrical portion 15b, and this output gear 15c is exposed to the outside of the housing 3 through a window hole 3d formed in the front end portion of the housing 3. As shown in FIG. 6, the output gear 15 c meshes with the input gear 302 a of the distance adjustment ring 302.

回転軸５の大径部５ｂには、入力回転軸７の前方に位置する環状部材（第２の押圧部材）１７が外嵌している。この環状部材１７の前面と円形板３ｃの後面との間には圧縮コイルばね（第２の付勢手段）１９が縮設されており、この圧縮コイルばね１９により、環状部材１７は常時後方に向けて付勢されている。 An annular member (second pressing member) 17 located in front of the input rotation shaft 7 is fitted on the large diameter portion 5 b of the rotation shaft 5. A compression coil spring (second urging means) 19 is provided between the front surface of the annular member 17 and the rear surface of the circular plate 3c. The compression coil spring 19 causes the annular member 17 to always move rearward. It is energized towards.

大径筒状部１５ａの正面視円形をなす内周面（第２の回転伝達円筒面）１５ａ１と略正方形断面の最小径部７ｄの各側面７ｄ１との間には、図８に示すように、周方向位置によってその径方向幅が異なる収納空間（第２の周方向不等幅空間）Ｓ１が形成されている。すなわち、最小径部７ｄと大径筒状部１５ａの内周面１５ａ１の間に形成された、正面視で環状をなす環状空間ＲＳは、４つの収納空間Ｓ１に区切られている。 As shown in FIG. 8, there is a space between an inner peripheral surface (second rotation transmission cylindrical surface) 15a1 forming a circular shape in front view of the large-diameter cylindrical portion 15a and each side surface 7d1 of the smallest diameter portion 7d having a substantially square cross section. A storage space (second circumferentially unequal width space) S1 having a different radial width depending on the circumferential position is formed. That is, the annular space RS formed between the minimum diameter portion 7d and the inner peripheral surface 15a1 of the large diameter cylindrical portion 15a and having an annular shape when viewed from the front is divided into four storage spaces S1.

各収納空間Ｓ１には、その中心軸（回転軸）Ｃ１が入力回転軸７の径方向を向く略円柱状の差動コロ（第２の差動回転部材）２１がそれぞれ配設されている。各差動コロ２１は、最小径部７ｄの各側面７ｄ１と筒状出力回転軸１５の大径筒状部１５ａの内周面１５ａ１との間に遊嵌しており、各差動コロ２１の周面には、環状部材１７の後面をなす押圧面（第２の押圧面）１７ａと軸方向直交面７ｃ１がそれぞれ当接している（押圧面１７ａと軸方向直交面７ｃ１とによって挟持されている）。 Each storage space S1 is provided with a substantially cylindrical differential roller (second differential rotating member) 21 whose central axis (rotating shaft) C1 faces the radial direction of the input rotating shaft 7. Each differential roller 21 is loosely fitted between each side surface 7d1 of the minimum diameter portion 7d and the inner peripheral surface 15a1 of the large diameter cylindrical portion 15a of the cylindrical output rotating shaft 15. On the peripheral surface, a pressing surface (second pressing surface) 17a forming the rear surface of the annular member 17 and an axially orthogonal surface 7c1 are in contact with each other (between the pressing surface 17a and the axially orthogonal surface 7c1). ).

さらに、各収納空間Ｓ１には、その中心軸（回転軸）Ｃ２が回転軸５の軸線と平行な方向を向く略円柱状の一対の食付コロ（第２の回転力伝達部材）２３が、正面視で各差動コロ２１を挟むようにして収納されている。各食付コロ２３は、各収納空間Ｓ１内を周方向に移動可能であり、さらに、これらの食付コロ２３の前後長は差動コロ２１の前後長より短く、食付コロ２３は環状部材１７から付勢力を受けないので、環状部材１７及び入力回転軸７に対して中心軸Ｃ２方向に相対移動可能である。
さらに、図示は省略してあるが、本レンズ鏡筒３００にも、ＡＦ撮影を可能または不能とするＡＦスイッチが設けられている。 Furthermore, in each storage space S1, a pair of substantially cylindrical food rollers (second rotational force transmission members) 23 whose central axis (rotating shaft) C2 faces in a direction parallel to the axis of the rotating shaft 5, The differential rollers 21 are stored so as to sandwich the differential rollers 21 when viewed from the front. Each eating roller 23 is movable in the circumferential direction in each storage space S1, and the front and rear lengths of these eating rollers 23 are shorter than the front and rear lengths of the differential rollers 21, and the eating rollers 23 are annular members. Since no urging force is received from 17, it can move relative to the annular member 17 and the input rotation shaft 7 in the direction of the central axis C 2.
Further, although not shown, the lens barrel 300 is also provided with an AF switch that enables or disables AF shooting.

次に、以上のような構成からなるレンズ鏡筒３００の動作について説明する。
まず、ＡＦによりフォーカシングを行う場合のレンズ鏡筒３００の動作について説明する。
最初に上記ＡＦスイッチをＯＮにして、ＡＦ撮影を可能な状態にしておく。
カメラ本体内に設けられた制御回路（図示略）がＡＦ用モータＭに正転信号を送り、ＡＦ用モータＭが正転すると、その回転力がピニオンＰ及び入力ギヤ７ｅを介して入力回転軸７に伝達され、入力回転軸７が図８の反時計方向に回転する。すると、環状部材１７の押圧面１７ａと軸方向直交面７ｃ１とによって挟持されている各差動コロ２１が各収納空間Ｓ１内を、中心軸Ｃ１回りに自転しながら、入力回転軸７の軸心回りに入力回転軸と同方向（反時計方向）に公転（回転）する。この際、各差動コロ２１と、押圧面１７ａ及び軸方向直交面７ｃ１との間に滑りが生じないとすると、各差動コロ２１の回転速度は入力回転軸７の１／２となる。その結果、各差動コロ２１は入力回転軸７に対して時計方向に相対回転することになる。このため、各差動コロ２１は、時計方向側に位置している食付コロ２３に接触し、この食付コロ２３に時計方向の回転力を与える。回転力を与えられた食付コロ２３は、各収納空間Ｓ１内を時計方向に回転し、各収納空間Ｓ１の径方向幅が狭くなっている時計方向側の端部において、最小径部７ｄの各側面７ｄ１と大径筒状部１５ａの内周面１５ａ１との間に強い力で食い込む。この結果、最小径部７ｄ（入力回転軸７）と筒状出力回転軸１５が食付コロ２３を介して周方向に一体となるので、最小径部７ｄの回転力が筒状出力回転軸１５に伝わり、筒状出力回転軸１５が反時計方向に回転する。筒状出力回転軸１５が回転すると、その筒状出力回転軸１５の回転力が出力ギヤ１５ｃから入力ギヤ３０２ａに伝わり、距離調節環３０２が正面視で反時計方向に回転し、移動環２１１とフォーカスレンズＬ２が光軸Ｏに沿って前方に移動する。
そして、このように距離調節環３０２が回転しても、距離調節環３０２の前端部の内周面３０２ｃは正面視円形をなしているので、第１の実施形態と同様に、距離調節環３０２から差動コロ２１８には回転力は伝達されず、マニュアルフォーカス環２０８は回転しない。 Next, the operation of the lens barrel 300 having the above configuration will be described.
First, the operation of the lens barrel 300 when performing focusing by AF will be described.
First, the AF switch is turned on so that AF shooting is possible.
When a control circuit (not shown) provided in the camera body sends a forward rotation signal to the AF motor M and the AF motor M rotates forward, the rotational force is input via the pinion P and the input gear 7e. 7 and the input rotary shaft 7 rotates counterclockwise in FIG. Then, each differential roller 21 sandwiched between the pressing surface 17a of the annular member 17 and the axially orthogonal surface 7c1 rotates around the central axis C1 in each storage space S1, and the axis of the input rotary shaft 7 is rotated. Revolves (rotates) in the same direction as the input rotation axis (counterclockwise). At this time, if no slip occurs between each differential roller 21 and the pressing surface 17 a and the axially orthogonal surface 7 c 1, the rotational speed of each differential roller 21 is ½ of the input rotation shaft 7. As a result, each differential roller 21 rotates relative to the input rotation shaft 7 in the clockwise direction. For this reason, each differential roller 21 comes into contact with the biting roller 23 located on the clockwise side, and gives a clockwise rotational force to the biting roller 23. The eating roller 23 to which the rotational force is applied rotates clockwise in each storage space S1, and at the end portion on the clockwise side where the radial width of each storage space S1 is narrow, the minimum diameter portion 7d. It bites with a strong force between each side surface 7d1 and the inner peripheral surface 15a1 of the large-diameter cylindrical portion 15a. As a result, since the minimum diameter portion 7d (input rotation shaft 7) and the cylindrical output rotation shaft 15 are integrated in the circumferential direction via the biting roller 23, the rotational force of the minimum diameter portion 7d is the cylindrical output rotation shaft 15. The cylindrical output rotating shaft 15 rotates counterclockwise. When the cylindrical output rotary shaft 15 rotates, the rotational force of the cylindrical output rotary shaft 15 is transmitted from the output gear 15c to the input gear 302a, and the distance adjusting ring 302 rotates counterclockwise when viewed from the front. The focus lens L2 moves forward along the optical axis O.
Even when the distance adjusting ring 302 rotates in this way, the inner peripheral surface 302c at the front end of the distance adjusting ring 302 has a circular shape when viewed from the front, so that the distance adjusting ring 302 is the same as in the first embodiment. Thus, no rotational force is transmitted to the differential roller 218, and the manual focus ring 208 does not rotate.

一方、制御回路がＡＦ用モータＭに逆転信号を送ってＡＦ用モータＭを逆転させると、その回転力がピニオンＰを介して入力回転軸７に伝達され、入力回転軸７が図８の時計方向に回転する。そして、各差動コロ２１が、その中心軸Ｃ１まわりに自転しつつ、入力回転軸７の１／２の回転速度で入力回転軸７と同方向に公転（回転）し、各差動コロ２１の反時計方向側に位置している食付コロ２３を反時計方向に回転付勢し、これらの食付コロ２３を各収納空間Ｓ１内を反時計方向に回転させ、各収納空間Ｓ１の径方向幅が狭くなっている反時計方向側の端部において、最小径部７ｄの各側面７ｄ１と大径筒状部１５ａの内周面１５ａ１との間に強い力で食い込ませる。この結果、最小径部７ｄ（入力回転軸７）と筒状出力回転軸１５が食付コロ２３を介して周方向に一体となり、筒状出力回転軸１５が時計方向に回転し、距離調節環３０２が正面視で時計方向に回転し、移動環２１１とフォーカスレンズＬ２が光軸Ｏに沿って後方に移動する。
この場合も、距離調節環３０２が回転しても、距離調節環３０２の内周面３０２ｃから差動コロ２１８には回転力は伝達されず、マニュアルフォーカス環２０８は回転しない。
そして、このように、制御回路がＡＦ用モータＭを正逆両方向へ回転させて、フォーカスレンズＬ２を前後に移動させることによりＡＦが行われる。 On the other hand, when the control circuit sends a reverse signal to the AF motor M to reversely rotate the AF motor M, the rotational force is transmitted to the input rotary shaft 7 through the pinion P, and the input rotary shaft 7 is transferred to the timepiece of FIG. Rotate in the direction. Each differential roller 21 revolves (rotates) in the same direction as the input rotation shaft 7 at a rotational speed that is 1/2 that of the input rotation shaft 7 while rotating around its central axis C 1. The counter rollers 23 are counterclockwise rotated and biased in the counterclockwise direction. The counter rollers 23 are rotated counterclockwise in the storage spaces S1, and the diameters of the storage spaces S1. At the end portion on the counterclockwise side where the direction width is narrow, a strong force is applied between each side surface 7d1 of the minimum diameter portion 7d and the inner peripheral surface 15a1 of the large diameter cylindrical portion 15a. As a result, the minimum diameter portion 7d (input rotation shaft 7) and the cylindrical output rotation shaft 15 are integrated in the circumferential direction via the biting roller 23, and the cylindrical output rotation shaft 15 rotates in the clockwise direction. 302 rotates clockwise in front view, and the moving ring 211 and the focus lens L2 move rearward along the optical axis O.
Also in this case, even if the distance adjusting ring 302 rotates, no rotational force is transmitted from the inner peripheral surface 302c of the distance adjusting ring 302 to the differential roller 218, and the manual focus ring 208 does not rotate.
Thus, AF is performed by the control circuit rotating the AF motor M in both forward and reverse directions and moving the focus lens L2 back and forth.

さらに、このようにＡＦによって合焦すると、制御回路からＡＦ用モータＭに信号が送られ、ＡＦ用モータＭは、ピニオンＰと入力ギヤ７ｅのバックラッシュより小さい回転角だけ、合焦直前の回転方向とは逆方向に回転する。すると、入力回転軸７が、筒状出力回転軸１５を回転させることなく、合焦直前の回転方向とは逆方向に回転し、食付コロ２３の最小径部７ｄ及び筒状出力回転軸１５に対する食い付き力が減少する。このため、この後にレンズ鏡筒３００のマニュアルフォーカス環２０８をスムーズに回転させられるようになる。 Further, when focusing is performed by AF in this way, a signal is sent from the control circuit to the AF motor M, and the AF motor M rotates immediately before focusing by a rotation angle smaller than the backlash of the pinion P and the input gear 7e. It rotates in the direction opposite to the direction. Then, the input rotation shaft 7 rotates in the direction opposite to the rotation direction immediately before focusing without rotating the cylindrical output rotation shaft 15, and the minimum diameter portion 7 d of the biting roller 23 and the cylindrical output rotation shaft 15. The biting force against is reduced. Therefore, after this, the manual focus ring 208 of the lens barrel 300 can be smoothly rotated.

次に、ＭＦによりフォーカシングを行う場合のレンズ鏡筒３００の動作について説明する。
ＡＦスイッチをＯＮにしたまま、ＡＦ用モータＭを駆動させずに、レンズ鏡筒３００のマニュアルフォーカス環２０８を正面視で時計方向または反時計方向に回転させると、この回転力は第１の実施形態と同様に距離調節環３０２に伝わり、移動環２１１とフォーカスレンズＬ２が前後方向に進退し、ＭＦが行われる。
さらに、距離調節環３０２が回転すると、この回転力が入力ギヤ３０２ａから筒状出力回転軸１５の出力ギヤ１５ｃに伝達される。すると、筒状出力回転軸１５が回転軸５回りに時計方向または反時計方向に回転するが、筒状出力回転軸１５の内周面（第２の回転伝達円筒面）１５ａ１は正面視円形をなしているので、筒状出力回転軸１５から食付コロ２３及び差動コロ２１には回転力は伝達されない。このため、筒状出力回転軸１５が回転しても最小径部７ｄ（入力回転軸７）は回転せず、ＡＦ用モータＭの回転軸Ｍ１が回転しないので、ＭＦ操作時にＡＦ用モータＭがマニュアルフォーカス環２０８にとって回転抵抗となることはなく、ＭＦ操作は円滑に行われる。 Next, the operation of the lens barrel 300 when focusing by MF will be described.
If the manual focus ring 208 of the lens barrel 300 is rotated clockwise or counterclockwise in front view without driving the AF motor M with the AF switch turned on, this rotational force is the first implementation. Similar to the embodiment, the signal is transmitted to the distance adjusting ring 302, and the moving ring 211 and the focus lens L2 advance and retract in the front-rear direction to perform MF.
Further, when the distance adjusting ring 302 rotates, this rotational force is transmitted from the input gear 302a to the output gear 15c of the cylindrical output rotating shaft 15. Then, the cylindrical output rotation shaft 15 rotates clockwise or counterclockwise around the rotation shaft 5, but the inner peripheral surface (second rotation transmission cylindrical surface) 15a1 of the cylindrical output rotation shaft 15 has a circular shape in front view. Therefore, the rotational force is not transmitted from the cylindrical output rotating shaft 15 to the eating roller 23 and the differential roller 21. For this reason, even if the cylindrical output rotation shaft 15 rotates, the minimum diameter portion 7d (input rotation shaft 7) does not rotate, and the rotation shaft M1 of the AF motor M does not rotate. There is no rotational resistance for the manual focus ring 208, and the MF operation is performed smoothly.

以上説明したように本実施形態のレンズ鏡筒３００によれば、第１の実施形態と同様の効果が得られるだけでなく、マニュアルフォーカス環２０８を回転させても、この回転力がＡＦ用モータＭに伝達されないので、ＯＮ状態にあるＡＦスイッチをＯＦＦ側に切り替えることなく、そのままＭＦ撮影を円滑に行うことができる。 As described above, according to the lens barrel 300 of the present embodiment, not only the same effects as in the first embodiment can be obtained, but even if the manual focus ring 208 is rotated, this rotational force is applied to the AF motor. Since it is not transmitted to M, MF shooting can be performed smoothly without switching the AF switch in the ON state to the OFF side.

さらに、一方向入出力回転伝達機構Ｕ２は、入力回転軸７に遅れながら差動コロ２１を同方向に公転（回転）させ、この差動コロ２１によって食付コロ２３を入力回転軸７と筒状出力回転軸１５の間に強固に食い込ませ、この食付コロ２３を回転力伝達部材として機能させているので、入力回転軸７から筒状出力回転軸１５へのトルク伝達を確実に行うことができ、その結果、ＡＦ動作を確実に行うことができる。 Further, the one-way input / output rotation transmission mechanism U2 revolves (rotates) the differential roller 21 in the same direction while being delayed from the input rotation shaft 7, and the differential roller 21 causes the biting roller 23 to move to the input rotation shaft 7 and the cylinder. Since the bite roller 23 functions as a rotational force transmission member, the torque output from the input rotary shaft 7 to the cylindrical output rotary shaft 15 is reliably performed. As a result, the AF operation can be performed reliably.

しかも、第２の回転力伝達部材である食付コロ２３は、回転軸５の軸線と平行な中心軸Ｃ２を有する円柱状部材なので、第２の回転力伝達部材を球状部材とした場合に比べて、入力回転軸７及び筒状出力回転軸１５との接触面積が大きい。このため、本実施形態の一方向入出力回転伝達機構Ｕ２は、第２の回転力伝達部材を球状とした場合に比べて、入力回転軸７から筒状出力回転軸１５への回転トルクの伝達効率が良い。 Moreover, the biting roller 23 as the second rotational force transmission member is a cylindrical member having a central axis C2 parallel to the axis of the rotational shaft 5, and therefore, compared to a case where the second rotational force transmission member is a spherical member. The contact area between the input rotary shaft 7 and the cylindrical output rotary shaft 15 is large. For this reason, the one-way input / output rotation transmission mechanism U2 of this embodiment transmits rotational torque from the input rotary shaft 7 to the cylindrical output rotary shaft 15 as compared with the case where the second rotational force transmission member is spherical. Efficiency is good.

なお、最小径部７ｄの断面形状を、正三角形や正五角形等、正方形以外の正多角形や、入力回転軸７の半径方向に直交する少なくとも一つの面を備えた非円形に変更することにより、各収納空間Ｓ１に配設する差動コロ２１及び食付コロ２３の数を変更することができ、このような変更を行うことにより、入力回転軸７から筒状出力回転軸１５への回転トルクの伝達効率を調整可能となる。 In addition, by changing the cross-sectional shape of the minimum diameter portion 7d to a regular polygon other than a square, such as a regular triangle or a regular pentagon, or a non-circular shape having at least one surface orthogonal to the radial direction of the input rotation shaft 7. The number of differential rollers 21 and biting rollers 23 arranged in each storage space S1 can be changed. By making such a change, the rotation from the input rotating shaft 7 to the cylindrical output rotating shaft 15 can be performed. The torque transmission efficiency can be adjusted.

さらに、上述した第２の実施形態のレンズ鏡筒３００に用いられている一方向入出力回転伝達機構Ｕ２は、以下のような構成とすることも可能である。 Furthermore, the one-way input / output rotation transmission mechanism U2 used in the lens barrel 300 of the second embodiment described above can be configured as follows.

図９は、一方向入出力回転伝達機構Ｕ２とは入力回転軸と出力回転軸の内外関係を逆にした、第１の変形例を示している（一方向入出力回転伝達機構Ｕ２と同じ部材には同じ符号を付している）。
この一方向入出力回転伝達機構Ｕ２ａは、回転軸５の大径部５ｂに、円筒状の出力回転軸２５を回転可能に外嵌し、その外側に筒状の筒状入力回転軸２７を回転可能に配置させたものである。筒状入力回転軸２７の内周面には、周方向位置によって径方向の深さが異なる４つの不等幅溝（第２の周方向不等幅空間形成部）（第２の不等幅溝）２７ａが、周方向に等角度間隔で並べて形成されている。各不等幅溝２７ａと出力回転軸２５の外周面（第２の回転伝達円筒面）２５ａの間には、周方向位置によってその径方向幅が異なる収納空間（第２の周方向不等幅空間）Ｓ２が形成されており、出力回転軸２５と筒状入力回転軸２７の間の環状空間ＲＳは、４つの収納空間Ｓ２に仕切られている。 FIG. 9 shows a first modification in which the internal / external relationship between the input rotation shaft and the output rotation shaft is reversed from that of the one-way input / output rotation transmission mechanism U2 (the same member as the one-way input / output rotation transmission mechanism U2). Are given the same reference).
The one-way input / output rotation transmission mechanism U2a has a cylindrical output rotary shaft 25 rotatably fitted on the large-diameter portion 5b of the rotary shaft 5, and a cylindrical cylindrical input rotary shaft 27 is rotated on the outside thereof. It is arranged as possible. On the inner peripheral surface of the cylindrical input rotary shaft 27, four unequal width grooves (second circumferential direction unequal width space forming portions) (second unequal width) having different radial depths depending on the circumferential position. Grooves) 27a are formed side by side at equal angular intervals in the circumferential direction. A storage space (second circumferential unequal width) between each unequal width groove 27a and the outer peripheral surface (second rotational transmission cylindrical surface) 25a of the output rotary shaft 25 varies in radial width depending on the circumferential position. Space S2 is formed, and the annular space RS between the output rotation shaft 25 and the cylindrical input rotation shaft 27 is partitioned into four storage spaces S2.

筒状入力回転軸２７は、回転軸５の軸線と直交する軸方向直交面（第２の軸方向直交面）２７ｂを備えており、各収納空間Ｓ２の前方には、一方向入出力回転伝達機構Ｕ２と同様に、圧縮コイルばね１９によって後方に付勢された環状部材１７（図９ではいずれも図示略）が配設されている。図示するように、各収納空間Ｓ２には差動コロ２１が配設されており、この差動コロ２１は、環状部材１７の押圧面１７ａと軸方向直交面２７ｂの間で常に挟持されている。さらに、各収納空間Ｓ２には、一対の食付コロ２３が、差動コロ２１を挟むようにして、各収納空間Ｓ２内を周方向に移動可能として配設されている。
図示は省略してあるが、筒状入力回転軸２７には入力ギヤが設けられており、この入力ギヤはＡＦ用モータＭのピニオンＰと噛合している。さらに、出力回転軸２５には出力ギヤが設けられており、この出力ギヤは、距離調節環３０２の入力ギヤ３０２ａと噛合している。 The cylindrical input rotating shaft 27 includes an axially orthogonal surface (second axially orthogonal surface) 27b orthogonal to the axis of the rotating shaft 5, and a unidirectional input / output rotation transmission is provided in front of each storage space S2. Similar to the mechanism U2, an annular member 17 (not shown in FIG. 9) urged rearward by the compression coil spring 19 is disposed. As shown in the figure, a differential roller 21 is disposed in each storage space S2, and this differential roller 21 is always held between the pressing surface 17a of the annular member 17 and the axially orthogonal surface 27b. . Furthermore, in each storage space S2, a pair of eating rollers 23 are arranged so as to be movable in the circumferential direction in each storage space S2 with the differential roller 21 interposed therebetween.
Although not shown, the cylindrical input rotation shaft 27 is provided with an input gear, and this input gear meshes with the pinion P of the AF motor M. Further, the output rotation shaft 25 is provided with an output gear, and this output gear meshes with the input gear 302 a of the distance adjusting ring 302.

ＡＦ用モータＭを正転または逆転させると、筒状入力回転軸２７が図９の時計方向または反時計方向に回転し、各差動コロ２１が各収納空間Ｓ２内を、中心軸Ｃ１回りに自転しつつ、筒状入力回転軸２７の１／２の回転速度で、筒状入力回転軸２７の軸心回りに筒状入力回転軸２７と同方向に公転（回転）し、筒状入力回転軸２７の回転方向とは逆方向に位置する食付コロ２３を時計方向または反時計方向に押圧する。押圧された食付コロ２３は各収納空間Ｓ２内を径方向幅が狭くなっている端部側に移動し、筒状入力回転軸２７の不等幅溝２７ａと出力回転軸２５の外周面２５ａの間に強い力で食い込む。この結果、筒状入力回転軸２７の回転力が各食付コロ２３を介して出力回転軸２５に伝達され、出力回転軸２５が筒状入力回転軸２７と同方向に回転し、ＡＦ動作が実行される。 When the AF motor M is rotated forward or backward, the cylindrical input rotary shaft 27 rotates clockwise or counterclockwise in FIG. 9, and each differential roller 21 moves around the central axis C1 in each storage space S2. While rotating, at a rotational speed that is 1/2 that of the cylindrical input rotary shaft 27, it revolves (rotates) around the axis of the cylindrical input rotary shaft 27 in the same direction as the cylindrical input rotary shaft 27, and the cylindrical input rotation. The biting roller 23 positioned in the direction opposite to the rotation direction of the shaft 27 is pressed clockwise or counterclockwise. The pressed bite roller 23 moves in each storage space S 2 to the end portion where the radial width is narrow, and the unequal width groove 27 a of the cylindrical input rotation shaft 27 and the outer peripheral surface 25 a of the output rotation shaft 25. I bite with a strong force in between. As a result, the rotational force of the cylindrical input rotary shaft 27 is transmitted to the output rotary shaft 25 via each biting roller 23, the output rotary shaft 25 rotates in the same direction as the cylindrical input rotary shaft 27, and the AF operation is performed. Executed.

この変形例でも、ＡＦによって合焦すると、制御回路からＡＦ用モータＭに信号が送られ、ＡＦ用モータＭは、ピニオンＰと筒状入力回転軸２７に設けられた入力ギヤのバックラッシュより小さい回転角だけ、合焦直前の回転方向とは逆方向に回転し、筒状入力回転軸２７が、出力回転軸２５を回転させることなく、合焦直前の回転方向とは逆方向に回転し、食付コロ２３の筒状入力回転軸２７及び出力回転軸２５に対する食い付き力を減少させる。この結果、この後にレンズ鏡筒３００のマニュアルフォーカス環２０８をスムーズに回転させられる。 Even in this modified example, when focusing is performed by AF, a signal is sent from the control circuit to the AF motor M, and the AF motor M is smaller than the backlash of the input gear provided on the pinion P and the cylindrical input rotating shaft 27. Only the rotation angle rotates in the direction opposite to the rotation direction immediately before focusing, and the cylindrical input rotation shaft 27 rotates in the direction opposite to the rotation direction immediately before focusing without rotating the output rotation shaft 25, The biting force of the biting roller 23 against the cylindrical input rotary shaft 27 and the output rotary shaft 25 is reduced. As a result, the manual focus ring 208 of the lens barrel 300 can be smoothly rotated thereafter.

図９の状態において、レンズ鏡筒３００のマニュアルフォーカス環２０８を回転させると、出力回転軸２５が時計方向または反時計方向に回転してＭＦが行われるが、出力回転軸２５の外周面２５ａは正面視円形なので、出力回転軸２５の回転力は食付コロ２３には伝わらない。そのため、筒状入力回転軸２７は回転せず、ＡＦ用モータＭの回転軸Ｍ１は回転しない。
このような一方向入出力回転伝達機構Ｕ２ａを採用しても、一方向入出力回転伝達機構Ｕ２を採用した場合と同様の効果が得られる。 In the state of FIG. 9, when the manual focus ring 208 of the lens barrel 300 is rotated, the output rotation shaft 25 rotates clockwise or counterclockwise, and MF is performed. However, the outer peripheral surface 25a of the output rotation shaft 25 is Since the front view is circular, the rotational force of the output rotary shaft 25 is not transmitted to the eating roller 23. Therefore, the cylindrical input rotating shaft 27 does not rotate, and the rotating shaft M1 of the AF motor M does not rotate.
Even if such a one-way input / output rotation transmission mechanism U2a is employed, the same effect as that obtained when the one-way input / output rotation transmission mechanism U2 is employed can be obtained.

図１０から図１２は、一方向入出力回転伝達機構Ｕ２の第２の変形例を示している。
この一方向入出力回転伝達機構Ｕ２ｂの入力回転軸３２は、その前部をなす小径部３２ａと、その後部をなす大径部３２ｂとを具備しており、大径部３２ｂの後端面には環状凹部３２ｃが形成されている。さらに、大径部３２ｂの環状をなす前面には、正面視環状の嵌合凹部３２ｄが形成されている。
大径部３２ｂの断面形状は円形であり、図１２に示すように、小径部３２ａの周面には、回転軸５の軸線と平行で、周方向位置によって深さが異なる６本の不等幅溝（第２の周方向不等幅空間形成部）（第２の不等幅溝）３２ｅが、周方向に等角度間隔で形成されている。そして、各不等幅溝３２ｅと大径筒状部１５ａの内周面（第２の回転伝達円筒面）１５ａ１の間には、周方向位置によってその径方向幅が異なる収納空間（第２の周方向不等幅空間）Ｓ３が形成されている。大径部３２ｂの外周面には、ピニオンＰと噛合する入力ギヤ３２ｆが設けられている。 10 to 12 show a second modification of the one-way input / output rotation transmission mechanism U2.
The input rotation shaft 32 of the one-way input / output rotation transmission mechanism U2b includes a small-diameter portion 32a that forms the front portion thereof and a large-diameter portion 32b that forms the rear portion thereof. An annular recess 32c is formed. Further, an annular fitting recess 32d is formed on the front surface of the large-diameter portion 32b which is annular.
The cross-sectional shape of the large-diameter portion 32b is circular, and as shown in FIG. 12, the circumferential surface of the small-diameter portion 32a is parallel to the axis of the rotating shaft 5 and has six unequal depths that vary in depth depending on the circumferential position. Width grooves (second circumferential direction unequal width space forming portions) (second unequal width grooves) 32e are formed at equal angular intervals in the circumferential direction. And between each non-equal width groove | channel 32e and the internal peripheral surface (2nd rotation transmission cylindrical surface) 15a1 of the large diameter cylindrical part 15a, the storage space (2nd in the radial direction) from which the radial direction position changes with circumferential positions. A circumferential unequal width space) S3 is formed. An input gear 32f that meshes with the pinion P is provided on the outer peripheral surface of the large diameter portion 32b.

筒状出力回転軸１５の内部には、後端が開放され、その前壁３４ａの中心部に回転軸５を通すための挿入孔３４ｂが穿設された筒状のリテーナ３４が配設されている。図１１に示すように、このリテーナ３４の前壁３４ａには、３個の嵌合孔３４ｃが周方向に等角度間隔で並べて穿設されており、各嵌合孔３４ｃには、その中心軸（回転軸）Ｃ３が筒状出力回転軸１５の径方向を向く略円柱形状の差動コロ（第２の差動回転部材）３６が、中心軸Ｃ３回りに回転自在として嵌合している。この差動コロ３６の前端は前壁３４ａの前方に突出しており、その後端部は前壁３４ａの後方に突出している。図１０に示すように、差動コロ３６の周面の前部は環状部材１７の押圧面１７ａに当接しており、周面の後部は、入力回転軸３２の小径部３２ａの前面に形成された光軸Ｏに対して直交する軸方向直交面（第２の軸方向直交面）３２ａ１に当接しているので、差動コロ３６は環状部材１７と軸方向直交面３２ａ１によって常に挟持されている。
図１２に示すように、リテーナ３４の筒状部３４ｄは、小径部３２ａと大径筒状部１５ａの間に形成された環状空間ＲＳに位置している。この筒状部３４ｄには、周方向に等角度間隔で並べて６個の取付孔３４ｅが穿設されており、各取付孔３４ｅには、その中心軸（回転軸）Ｃ４が回転軸５の軸線と平行な食付コロ（第２の回転力伝達部材）３８が、その中心軸Ｃ４回りに回転自在かつ中心軸Ｃ４方向に移動自在として嵌合されている。 Inside the cylindrical output rotating shaft 15, a cylindrical retainer 34 having a rear end opened and having an insertion hole 34b through which the rotating shaft 5 passes is provided at the center of the front wall 34a. Yes. As shown in FIG. 11, in the front wall 34a of the retainer 34, three fitting holes 34c are bored side by side at equal angular intervals in the circumferential direction, and each fitting hole 34c has a central axis thereof. A substantially cylindrical differential roller (second differential rotating member) 36 (rotating shaft) C3 facing the radial direction of the cylindrical output rotating shaft 15 is fitted so as to be rotatable around the central axis C3. The front end of the differential roller 36 protrudes forward of the front wall 34a, and the rear end portion protrudes rearward of the front wall 34a. As shown in FIG. 10, the front portion of the circumferential surface of the differential roller 36 is in contact with the pressing surface 17 a of the annular member 17, and the rear portion of the circumferential surface is formed on the front surface of the small diameter portion 32 a of the input rotation shaft 32. Further, the differential roller 36 is always held between the annular member 17 and the axially orthogonal surface 32a1 because it is in contact with the axially orthogonal surface (second axially orthogonal surface) 32a1 orthogonal to the optical axis O. .
As shown in FIG. 12, the cylindrical portion 34d of the retainer 34 is located in an annular space RS formed between the small diameter portion 32a and the large diameter cylindrical portion 15a. The cylindrical portion 34d is formed with six mounting holes 34e arranged at equal angular intervals in the circumferential direction, and the central axis (rotating shaft) C4 of each mounting hole 34e is the axis of the rotating shaft 5. And a corrugated roller (second rotational force transmitting member) 38 that is parallel to the central axis C4 is fitted so as to be rotatable about the central axis C4 and movable in the direction of the central axis C4.

上記ＡＦスイッチをＯＮにして、カメラ本体内に設けられた制御回路からＡＦ用モータＭに正転信号を送り、ＡＦ用モータＭを正転させると、その回転力がピニオンＰ及び入力ギヤ３２ｆを介して入力回転軸３２に伝達され、入力回転軸３２が図１２の反時計方向に回転する。すると、環状部材１７の押圧面１７ａと軸方向直交面３２ａ１とによって挟持されている各差動コロ３６が、中心軸Ｃ３回りに自転しつつ、入力回転軸３２の１／２の回転速度で、入力回転軸３２の軸心回りに入力回転軸３２と同方向に公転（回転）する。この結果、回転軸５回りに差動コロ３６と一緒に回転するリテーナ３４と各食付コロ３８は、入力回転軸３２に対して時計方向に相対回転する。すると、食付コロ３８は、各収納空間Ｓ３の径方向幅が狭くなっている時計方向側の端部において、不等幅部３２ｅの時計方向側の端部と大径筒状部１５ａの内周面１５ａ１との間に強い力で食い込む。この結果、小径部３２ａ（入力回転軸３２）と筒状出力回転軸１５が、食付コロ３８、リテーナ３４、及び差動コロ３６を介して周方向に一体となるので、小径部３２ａの回転力が筒状出力回転軸１５に伝わり、筒状出力回転軸１５が反時計方向に回転する。すると、筒状出力回転軸１５に形成された出力ギヤ１５ｃが回転し、この回転力が、レンズ鏡筒２００、３００の距離調節環２１０、３０２の入力ギヤ２１０ａ、３０２ａに伝達され、フォーカスレンズＬ２が光軸Ｏに沿って前方に移動する。 When the AF switch is turned on, a forward rotation signal is sent from the control circuit provided in the camera body to the AF motor M, and the AF motor M is rotated forward, the rotational force is applied to the pinion P and the input gear 32f. Is transmitted to the input rotary shaft 32, and the input rotary shaft 32 rotates counterclockwise in FIG. Then, each differential roller 36 sandwiched between the pressing surface 17a of the annular member 17 and the axially orthogonal surface 32a1 rotates around the central axis C3, and at a rotational speed that is 1/2 of the input rotational shaft 32, It revolves (rotates) around the axis of the input rotation shaft 32 in the same direction as the input rotation shaft 32. As a result, the retainer 34 and the biting rollers 38 that rotate together with the differential roller 36 around the rotation shaft 5 rotate relative to the input rotation shaft 32 in the clockwise direction. Then, the bite roller 38 has an end portion on the clockwise side of the unequal width portion 32e and an inner portion of the large-diameter cylindrical portion 15a at the end portion on the clockwise side where the radial width of each storage space S3 is narrow. It bites in with strong force between the peripheral surface 15a1. As a result, the small diameter portion 32a (input rotation shaft 32) and the cylindrical output rotation shaft 15 are integrated in the circumferential direction via the biting roller 38, the retainer 34, and the differential roller 36, so that the rotation of the small diameter portion 32a. The force is transmitted to the cylindrical output rotating shaft 15, and the cylindrical output rotating shaft 15 rotates counterclockwise. Then, the output gear 15c formed on the cylindrical output rotating shaft 15 rotates, and this rotational force is transmitted to the input gears 210a and 302a of the distance adjusting rings 210 and 302 of the lens barrels 200 and 300, and the focus lens L2 Moves forward along the optical axis O.

一方、制御回路からＡＦ用モータＭに逆転信号を送ってＡＦ用モータＭを逆転させると、その回転力がピニオンＰ及び入力ギヤ３２ｆを介して入力回転軸３２に伝達され、入力回転軸３２が図１２の時計方向に回転する。そして、各差動コロ３６が、入力回転軸３２の１／２の回転速度で時計方向に公転（回転）し、リテーナ３４と各食付コロ３８が、入力回転軸３２に対して反時計方向に相対回転する。その結果、各食付コロ３８が、各収納空間Ｓ３内を反時計方向に回転し、各収納空間Ｓ３の径方向幅が狭くなっている反時計方向側の端部において、不等幅溝３２ｅの反時計方向側の端部と大径筒状部１５ａの内周面１５ａ１との間に強い力で食い込む。すると、小径部３２ａ（入力回転軸３２）と筒状出力回転軸１５が食付コロ３８、リテーナ３４、及び差動コロ３６を介して周方向に一体となり、筒状出力回転軸１５が時計方向に回転し、フォーカスレンズＬ２は光軸Ｏに沿って後方に移動する。
このように、制御回路がＡＦ用モータＭを正逆両方向へ回転させることによりＡＦが行われる。 On the other hand, when a reverse signal is sent from the control circuit to the AF motor M to reverse the AF motor M, the rotational force is transmitted to the input rotary shaft 32 via the pinion P and the input gear 32f, and the input rotary shaft 32 is It rotates clockwise in FIG. Then, each differential roller 36 revolves (rotates) in the clockwise direction at a rotational speed that is 1/2 of the input rotation shaft 32, and the retainer 34 and each biting roller 38 counterclockwise with respect to the input rotation shaft 32. Rotate relative to As a result, each eating roller 38 rotates counterclockwise in each storage space S3, and the non-equal width groove 32e is formed at the counterclockwise end where the radial width of each storage space S3 is narrow. Between the end portion on the counterclockwise direction and the inner peripheral surface 15a1 of the large-diameter cylindrical portion 15a with a strong force. Then, the small-diameter portion 32a (input rotation shaft 32) and the cylindrical output rotation shaft 15 are integrated in the circumferential direction via the biting roller 38, the retainer 34, and the differential roller 36, and the cylindrical output rotation shaft 15 is clockwise. The focus lens L2 moves backward along the optical axis O.
Thus, AF is performed by the control circuit rotating the AF motor M in both forward and reverse directions.

さらに本変形例を適用したレンズ鏡筒３００でも、ＡＦによって合焦すると、制御回路からＡＦ用モータＭに信号が送られ、ＡＦ用モータＭは、ピニオンＰと入力ギヤ３２ｆのバックラッシュより小さい回転角だけ、合焦直前の回転方向とは逆方向に回転する。すると、入力回転軸３２が、筒状出力回転軸１５を回転させることなく、合焦直前の回転方向とは逆方向に回転し、食付コロ３８の筒状出力回転軸１５及び入力回転軸３２に対する食い付き力が減少するので、この後にマニュアルフォーカス環２０８をスムーズに回転させられる。 Further, even in the lens barrel 300 to which this modification is applied, when focusing is performed by AF, a signal is sent from the control circuit to the AF motor M, and the AF motor M rotates less than the backlash of the pinion P and the input gear 32f. Only the corner rotates in the opposite direction to the rotation direction just before focusing. Then, the input rotation shaft 32 rotates in the direction opposite to the rotation direction immediately before focusing without rotating the cylindrical output rotation shaft 15, and the cylindrical output rotation shaft 15 and the input rotation shaft 32 of the biting roller 38. Therefore, the manual focus ring 208 can be smoothly rotated thereafter.

図１２の状態において、レンズ鏡筒３００のマニュアルフォーカス環２０８を回転させると、筒状出力回転軸１５が時計方向または反時計方向に回転するが、筒状出力回転軸１５の大径筒状部１５ａの内周面１５ａ１は正面視円形なので、筒状出力回転軸１５の回転力は食付コロ３８には伝わらず、入力回転軸３２は回転しない。このため、ＡＦ用モータＭの回転軸Ｍ１は回転しない。 In the state of FIG. 12, when the manual focus ring 208 of the lens barrel 300 is rotated, the cylindrical output rotation shaft 15 rotates clockwise or counterclockwise, but the large-diameter cylindrical portion of the cylindrical output rotation shaft 15 is rotated. Since the inner peripheral surface 15a1 of 15a is circular when viewed from the front, the rotational force of the cylindrical output rotary shaft 15 is not transmitted to the biting roller 38, and the input rotary shaft 32 does not rotate. For this reason, the rotation shaft M1 of the AF motor M does not rotate.

このような一方向入出力回転伝達機構Ｕ２ｂを採用しても、一方向入出力回転伝達機構Ｕ２を採用した場合と同様の効果が得られる。
さらに、リテーナ３４を用いたことにより、入力回転軸３２の小径部３２ａと筒状出力回転軸１５の間に形成された環状空間ＲＳをスペース的に有効利用できる。その結果、食付コロ３８の数を増やすことが可能となり、食付コロ３８の数を増やせば、入力回転軸３２から筒状出力回転軸１５への回転トルクの伝達効率を向上させることが可能となる。 Even if such a one-way input / output rotation transmission mechanism U2b is employed, the same effect as that obtained when the one-way input / output rotation transmission mechanism U2 is employed can be obtained.
Furthermore, by using the retainer 34, the annular space RS formed between the small-diameter portion 32a of the input rotation shaft 32 and the cylindrical output rotation shaft 15 can be effectively used in terms of space. As a result, it is possible to increase the number of biting rollers 38. If the number of biting rollers 38 is increased, it is possible to improve the transmission efficiency of rotational torque from the input rotary shaft 32 to the cylindrical output rotary shaft 15. It becomes.

図１３は、第２の変形例とは入力回転軸と出力回転軸の内外関係を逆にした、一方向入出力回転伝達機構Ｕ２の第３の変形例を示している（一方向入出力回転伝達機構Ｕ２ｂと同じ部材には同じ符号を付している）。
この一方向入出力回転伝達機構Ｕ２ｃは、回転軸５の大径部５ｂに、円筒状の出力回転軸４０を回転可能に外嵌し、その外側に筒状入力回転軸４２を回転可能に配置させたものである。筒状入力回転軸４２の内周面には、周方向位置によって径方向の深さが異なる６つの不等幅溝（第２の周方向不等幅空間形成部）（第２の不等幅溝）４２ａが、周方向に等角度間隔で並べて形成されている。各不等幅溝４２ａと出力回転軸４０の外周面（第２の回転伝達円筒面）４０ａの間には、周方向位置によってその径方向幅が異なる収納空間（第２の周方向不等幅空間）Ｓ４が形成されている。 FIG. 13 shows a third modification of the one-way input / output rotation transmission mechanism U2 in which the internal / external relationship between the input rotation shaft and the output rotation shaft is reversed from the second modification (one-way input / output rotation). The same members as those of the transmission mechanism U2b are assigned the same reference numerals)
In this one-way input / output rotation transmission mechanism U2c, a cylindrical output rotary shaft 40 is rotatably fitted on the large-diameter portion 5b of the rotary shaft 5 and a cylindrical input rotary shaft 42 is rotatably arranged on the outside thereof. It has been made. On the inner peripheral surface of the cylindrical input rotating shaft 42, there are six unequal width grooves (second circumferential direction unequal width space forming portions) (second unequal width widths) whose radial depth varies depending on the circumferential position. Grooves) 42a are formed side by side at equal angular intervals in the circumferential direction. Between each unequal width groove 42a and the outer peripheral surface (second rotation transmission cylindrical surface) 40a of the output rotating shaft 40, a storage space (second circumferential unequal width) having a different radial width depending on a circumferential position. Space) S4 is formed.

筒状入力回転軸４２と出力回転軸４０の間に形成されている環状空間ＲＳ（収納空間Ｓ４）の前方には、一方向入出力回転伝達機構Ｕ２ｂと同様に、圧縮コイルばね１９によって後方に付勢されている環状部材１７（図１３ではいずれも図示略）が配設されており、該環状空間ＲＳにはリテーナ３４の筒状部３４ｄが回転可能として配設されている。図１３では図示を省略しているが、リテーナ３４の前壁３４ａに設けられた嵌合孔３４ｃには差動コロ３６が中心軸Ｃ３回りに回転自在として嵌合している。各差動コロ３６は、圧縮コイルばね１９の付勢力によって、環状部材１７の押圧面１７ａと、筒状入力回転軸４２に形成された、筒状入力回転軸４２の軸線と直交する軸方向直交面（第２の軸方向直交面）（図１３では図示略）との間で常に挟持されている。さらに、リテーナ３４の筒状部３４ｄには周方向に並べて６個の取付孔３４ｅが穿設され、各取付孔３４ｅには、その中心軸Ｃ４が回転軸５の軸線と平行をなす食付コロ３８が、中心軸Ｃ４回りに回転自在かつ、中心軸Ｃ４方向に移動可能に支持されており、各食付コロ３８は各収納空間Ｓ４内に位置している。
図示は省略してあるが、筒状入力回転軸４２には入力ギヤが設けられており、この入力ギヤはＡＦ用モータＭのピニオンＰと噛合している。さらに、出力回転軸４０には出力ギヤが設けられており、この出力ギヤは、距離調節環３０２の入力ギヤ３０２ａと噛合している。 Similar to the one-way input / output rotation transmission mechanism U2b, in front of the annular space RS (housing space S4) formed between the cylindrical input rotating shaft 42 and the output rotating shaft 40, it is moved rearward by the compression coil spring 19. A biased annular member 17 (none of which is shown in FIG. 13) is disposed, and a cylindrical portion 34d of the retainer 34 is rotatably disposed in the annular space RS. Although not shown in FIG. 13, a differential roller 36 is fitted in a fitting hole 34c provided in the front wall 34a of the retainer 34 so as to be rotatable about the central axis C3. Each differential roller 36 is axially orthogonal to the pressing surface 17a of the annular member 17 and the axial line of the cylindrical input rotary shaft 42 formed on the cylindrical input rotary shaft 42 by the urging force of the compression coil spring 19. It is always held between a surface (second axially orthogonal surface) (not shown in FIG. 13). Furthermore, six mounting holes 34e are formed in the cylindrical portion 34d of the retainer 34 so as to be arranged in the circumferential direction, and the central axis C4 of each mounting hole 34e is parallel to the axis of the rotary shaft 5. 38 is supported so as to be rotatable around the central axis C4 and movable in the direction of the central axis C4, and each eating roller 38 is located in each storage space S4.
Although not shown, the cylindrical input rotary shaft 42 is provided with an input gear, and this input gear meshes with the pinion P of the AF motor M. Further, the output rotation shaft 40 is provided with an output gear, and this output gear meshes with the input gear 302 a of the distance adjustment ring 302.

ＡＦ用モータＭを正転または逆転させると、筒状入力回転軸４２が図１３の時計方向または反時計方向に回転し、各差動コロ３６、リテーナ３４、及び食付コロ３８が、筒状入力回転軸４２の１／２の回転速度で筒状入力回転軸４２と同方向に公転（回転）する。すると、各食付コロ３８は、各収納空間Ｓ４内を筒状入力回転軸４２に対して反対方向に相対回転し、各収納空間Ｓ４の径方向幅が狭くなっている端部側に移動し、筒状入力回転軸４２の不等幅溝４２ａと出力回転軸４０の外周面４０ａの間に強い力で食い込む。この結果、筒状入力回転軸４２の回転力が各食付コロ３８を介して出力回転軸４０に伝達され、出力回転軸４０が筒状入力回転軸４２と同方向に回転し合焦する。 When the AF motor M is rotated forward or backward, the cylindrical input rotary shaft 42 rotates clockwise or counterclockwise in FIG. 13, and each differential roller 36, the retainer 34, and the eating roller 38 are cylindrical. It revolves (rotates) in the same direction as the cylindrical input rotary shaft 42 at a rotational speed ½ that of the input rotary shaft 42. Then, each eating roller 38 relatively rotates in the opposite direction with respect to the cylindrical input rotation shaft 42 in each storage space S4 and moves to the end side where the radial width of each storage space S4 is narrow. In addition, it bites in between the unequal width groove 42a of the cylindrical input rotating shaft 42 and the outer peripheral surface 40a of the output rotating shaft 40 with a strong force. As a result, the rotational force of the cylindrical input rotating shaft 42 is transmitted to the output rotating shaft 40 via each biting roller 38, and the output rotating shaft 40 rotates in the same direction as the cylindrical input rotating shaft 42 and is focused.

この変形例でも、ＡＦによって合焦すると、制御回路からＡＦ用モータＭに信号が送られ、ＡＦ用モータＭは、ピニオンＰと筒状入力回転軸４２の入力ギヤのバックラッシュより小さい回転角だけ、合焦直前の回転方向とは逆方向に回転し、筒状入力回転軸４２が、出力回転軸４０を回転させることなく、合焦直前の回転方向とは逆方向に回転し、食付コロ３８の出力回転軸４０及び筒状入力回転軸４２に対する食い付き力を減少させる。この結果、この後にレンズ鏡筒３００のマニュアルフォーカス環２０８をスムーズに回転させられる。 Even in this modified example, when focusing is performed by AF, a signal is sent from the control circuit to the AF motor M, and the AF motor M has a rotation angle smaller than the backlash of the input gear of the pinion P and the cylindrical input rotating shaft 42. The cylindrical input rotary shaft 42 rotates in the opposite direction to the rotational direction immediately before the focusing without rotating the output rotary shaft 40, and the eating roller is rotated. The biting force on the output rotating shaft 40 and the cylindrical input rotating shaft 42 of 38 is reduced. As a result, the manual focus ring 208 of the lens barrel 300 can be smoothly rotated thereafter.

図１３の状態において、レンズ鏡筒３００のマニュアルフォーカス環２０８を回転させると、出力回転軸４０が時計方向または反時計方向に回転するが、出力回転軸４０の外周面４０ａは正面視円形なので、出力回転軸４０の回転力は食付コロ３８には伝わらず、筒状入力回転軸４２は回転しない。
このような変形例によっても、第２の変形例と同様の効果が得られる。 In the state of FIG. 13, when the manual focus ring 208 of the lens barrel 300 is rotated, the output rotation shaft 40 rotates clockwise or counterclockwise, but the outer peripheral surface 40a of the output rotation shaft 40 is circular when viewed from the front. The rotational force of the output rotating shaft 40 is not transmitted to the biting roller 38, and the cylindrical input rotating shaft 42 does not rotate.
Also by such a modification, the same effect as the second modification can be obtained.

なお、第２の実施形態及びその変形例の一方向入出力回転伝達機構Ｕ２、Ｕ２ａ、Ｕ２ｂ、Ｕ２ｃにおいて、入力回転軸７、３２、筒状入力回転軸２７、４２から筒状出力回転軸１５、出力回転軸２５、４０への回転トルクの伝達効率を無視すれば、差動コロ２１、３６や食付コロ２３、３８を単なる球状部材に代える事も可能である。
また、差動コロ２１、３６の代わりに、図１４に示すような差動コロ５０を用いることも可能である。この差動コロ５０は、その中心軸（回転軸）Ｃ５が入力回転軸７、３２または筒状入力回転軸２７、４２の径方向を向いており、中心軸Ｃ５に直交する方向の断面形状が、中心軸Ｃ５のいずれの位置においても図１４に示す形状となっている。この場合は、一対の円弧部５０ａ、５０ｂが環状部材１７の押圧面１７ａ及び軸方向直交面７ｃ１、３２ａ１と当接関係を維持する範囲で入力回転軸７、３２、筒状入力回転軸２７、４２を回転させ、この回転範囲内で食付コロ２３、３８を、入力回転軸７、３２と筒状出力回転軸１５の間、または、筒状入力回転軸２７、４２と出力回転軸２５、４０の間に食い込ませるようにする。
さらに、回転トルクの伝達効率の低下を無視すれば、一つの収納空間Ｓ１、Ｓ２、Ｓ３、Ｓ４にのみ差動コロ２１、３６、５０及び食付コロ２３、３８を配設して実施することも可能である。 In the unidirectional input / output rotation transmission mechanism U2, U2a, U2b, U2c of the second embodiment and its modifications, the input output shafts 7, 32, the cylindrical input rotation shafts 27, 42 to the cylindrical output rotation shaft 15 If the transmission efficiency of the rotational torque to the output rotary shafts 25 and 40 is ignored, the differential rollers 21 and 36 and the eating rollers 23 and 38 can be replaced with simple spherical members.
Further, instead of the differential rollers 21 and 36, it is possible to use a differential roller 50 as shown in FIG. The differential roller 50 has a central axis (rotary axis) C5 that faces the radial direction of the input rotary shafts 7 and 32 or the cylindrical input rotary shafts 27 and 42, and has a cross-sectional shape perpendicular to the central axis C5. The shape shown in FIG. 14 is obtained at any position on the central axis C5. In this case, the input rotation shafts 7 and 32, the cylindrical input rotation shaft 27, and the like so long as the pair of arc portions 50a and 50b maintain a contact relationship with the pressing surface 17a of the annular member 17 and the axially orthogonal surfaces 7c1 and 32a1. 42, and within this rotation range, the eating rollers 23 and 38 are moved between the input rotary shafts 7 and 32 and the cylindrical output rotary shaft 15, or the cylindrical input rotary shafts 27 and 42 and the output rotary shaft 25, Invite between 40.
Furthermore, if the reduction in rotational torque transmission efficiency is ignored, the differential rollers 21, 36, 50 and the eating rollers 23, 38 are arranged only in one storage space S 1, S 2, S 3, S 4. Is also possible.

また、大径筒状部１５ａの内周面１５ａ１と各側面７ｄ１または各不等幅溝３２ｅの端部とで形成される楔状の空間の楔角、出力回転軸２５、４０の外周面２５ａ、４０ａと筒状入力回転軸２７、４２の不等幅溝２７ａ、４２ａとで形成される楔状の空間の楔角、圧縮コイルばね１９の強さ、軸方向直交面７ｃ１、２７ｂ、３２ａ１及び環状部材１７の押圧面１７ａの面粗さを変えることによって、入力回転軸７、３２、筒状入力回転軸２７、４２から筒状出力回転軸１５、出力回転軸２５、４０への回転トルクの伝達効率を変えることが可能である。 Further, the wedge angle of the wedge-shaped space formed by the inner peripheral surface 15a1 of the large-diameter cylindrical portion 15a and the end portions of the side surfaces 7d1 or the unequal width grooves 32e, the outer peripheral surfaces 25a of the output rotary shafts 25 and 40, 40a and the wedge angle of the wedge-shaped space formed by the unequal width grooves 27a and 42a of the cylindrical input rotary shafts 27 and 42, the strength of the compression coil spring 19, the axial orthogonal surfaces 7c1, 27b, 32a1 and the annular member Rotational torque transmission efficiency from the input rotary shafts 7 and 32 and the cylindrical input rotary shafts 27 and 42 to the cylindrical output rotary shaft 15 and the output rotary shafts 25 and 40 by changing the surface roughness of the 17 pressing surfaces 17a. Can be changed.

さらに、一方向入出力回転伝達機構Ｕ１を、マニュアルフォーカス環２０８の環状突条２０８ｂを距離調節環２１０、３０２の前端部の外周側に位置させ、環状突条２０８ｂの内周面に収納凹部２１２を形成し、距離調節環２１０、３０２の前端部の外周面を、正面視で円形をなす第１の回転伝達円筒面とし、収納凹部２１２に形成した不等幅溝２１４及び扁平部２１６と第１の回転伝達円筒面との間に、第１の周方向不等幅空間を形成し、収納凹部と第１の回転伝達円筒面の間に差動コロ２１８と食付コロ２２４を配置させて構成してもよい。 Further, in the one-way input / output rotation transmission mechanism U1, the annular protrusion 208b of the manual focus ring 208 is positioned on the outer peripheral side of the front end portions of the distance adjustment rings 210 and 302, and the housing recess 212 is formed on the inner peripheral surface of the annular protrusion 208b. The outer peripheral surface of the front end portion of the distance adjustment rings 210 and 302 is a first rotation transmission cylindrical surface that is circular in a front view, and the unequal width groove 214 and the flat portion 216 formed in the storage recess 212 are A first circumferentially unequal width space is formed between the rotation transmission cylindrical surface and the differential roller 218 and the eating roller 224 are disposed between the storage recess and the first rotation transmission cylindrical surface. It may be configured.

また、第２の実施形態及びその変形例では、一方向入出力回転伝達機構Ｕ２、Ｕ２ａ、Ｕ２ｂ、Ｕ２ｃをフォーカスレンズ鏡筒に適用したが、ズームレンズ鏡筒に適用してもよい。即ち、レンズ鏡筒３００を、ズームレンズを保持する移動環を光軸方向に移動させるための距離調節環を、パワーズームスイッチがＯＦＦのときはズーム環（手動操作環）によって、パワーズームスイッチがＯＮのときはズーム環の回転に連動して駆動するズーム用モータ（モータ）によって回転させるように構成し、かつ、上記ズーム用モータと距離調節環との間に一方向入出力回転伝達機構Ｕ２、Ｕ２ａ、Ｕ２ｂ、Ｕ２ｃを設ける。
レンズ鏡筒３００をこのような構成にすれば、パワーズームスイッチをＯＮにした上でズーム環を回転させれば、ズーム用モータの駆動力により距離調節環が回転してズーミングが行われる。一方、パワーズームスイッチをＯＦＦにしてズーム環を回転させればマニュアルズームが行われるが、この際、一方向入出力回転伝達機構Ｕ２、Ｕ２ａ、Ｕ２ｂ、Ｕ２ｃが、ズーム環によって回転させられた距離調節環の回転力をズーム用モータに伝達しないので、マニュアルズーム操作を、ズーム用モータから抵抗を受けることなく円滑に行える。 In the second embodiment and its modifications, the unidirectional input / output rotation transmission mechanisms U2, U2a, U2b, and U2c are applied to the focus lens barrel, but may be applied to a zoom lens barrel. That is, the power zoom switch is moved by a distance adjusting ring for moving the lens barrel 300 in the direction of the optical axis of the moving ring that holds the zoom lens, and the zoom ring (manual operation ring) when the power zoom switch is OFF. When ON, it is configured to be rotated by a zoom motor (motor) that is driven in conjunction with the rotation of the zoom ring, and a one-way input / output rotation transmission mechanism U2 is provided between the zoom motor and the distance adjustment ring. , U2a, U2b, U2c are provided.
When the lens barrel 300 has such a configuration, when the zoom ring is rotated with the power zoom switch turned on, the distance adjusting ring is rotated by the driving force of the zoom motor, and zooming is performed. On the other hand, if the zoom ring is rotated with the power zoom switch turned off, manual zoom is performed. At this time, the distance that the one-way input / output rotation transmission mechanism U2, U2a, U2b, U2c is rotated by the zoom ring. Since the rotating force of the adjusting ring is not transmitted to the zoom motor, the manual zoom operation can be performed smoothly without receiving resistance from the zoom motor.

本発明の第１の実施形態のレンズ鏡筒の上半部の縦断側面図である。It is a vertical side view of the upper half part of the lens barrel of the first embodiment of the present invention. 図１のII−II線に沿う、レンズ保持環、移動環、及びフォーカスレンズを省略した図である。It is the figure which abbreviate | omitted the lens holding ring, the moving ring, and the focus lens along the II-II line | wire of FIG. 第１の一方向入出力回転伝達機構を、環状突条の外周側から見た拡大図である。It is the enlarged view which looked at the 1st one way input / output rotation transmission mechanism from the perimeter side of an annular ridge. 第１の一方向入出力回転伝達機構の拡大縦断正面図である。It is an enlarged vertical front view of a first one-way input / output rotation transmission mechanism. マニュアルフォーカス環を回転させた時の、第１の一方向入出力回転伝達機構の拡大縦断正面図である。It is an enlarged vertical front view of the first one-way input / output rotation transmission mechanism when the manual focus ring is rotated. 本発明の第２の実施形態のレンズ鏡筒の上半部の縦断側面図である。It is a vertical side view of the upper half part of the lens barrel of the second embodiment of the present invention. 第２の一方向入出力回転伝達機構の縦断側面図である。It is a vertical side view of the 2nd one way input / output rotation transmission mechanism. 図７のＶIII−ＶIII線に沿う縦断正面図である。It is a vertical front view which follows the VIII-VIII line of FIG. 第２の一方向入出力回転伝達機構の第１の変形例の拡大縦断正面図である。It is an expansion vertical front view of the 1st modification of the 2nd one way input / output rotation transmission mechanism. 第２の一方向入出力回転伝達機構の第２の変形例の縦断側面図である。It is a vertical side view of the 2nd modification of the 2nd one way input / output rotation transmission mechanism. 図１０のＸI−ＸI線に沿う縦断正面図である。It is a vertical front view which follows the XI-XI line of FIG. 図１０のＸII−ＸII線に沿う縦断正面図である。It is a vertical front view which follows the XII-XII line | wire of FIG. 第２の一方向入出力回転伝達機構の第３の変形例の縦断正面図である。It is a vertical front view of the 3rd modification of the 2nd one way input / output rotation transmission mechanism. 差動コロの変形例の、その中心軸に直交する断面図である。It is sectional drawing orthogonal to the center axis | shaft of the modification of a differential roller.

符号の説明Explanation of symbols

３ハウジング
３ａ環状フランジ
３ｂ前壁
３ｃ円形板
３ｄ窓孔
５回転軸
５ａ小径部
５ｂ大径部
７入力回転軸
７ａ中心孔
７ｂ最大径部
７ｃ中間径部
７ｃ１軸方向直交面
７ｄ最小径部（断面非円形部）
７ｄ１側面（第２の周方向不等幅空間形成部）
７ｅ入力ギヤ
７ｆ環状凹部
９ベアリングボール
１１抜け止め板
１３固定ねじ
１５筒状出力回転軸
１５ａ大径筒状部
１５ａ１内周面（第２の回転伝達円筒面）
１５ｂ小径筒状部
１５ｃ出力ギヤ
１７環状部材（第２の押圧部材）
１７ａ押圧面（第２の押圧面）
１９圧縮コイルばね（第２の付勢手段）
２１差動コロ（第２の差動回転部材）
２３食付コロ（第２の回転力伝達部材）
２５出力回転軸
２５ａ外周面（第２の回転伝達円筒面）
２７筒状入力回転軸
２７ａ不等幅溝（第２の周方向不等幅空間形成部）（第２の不等幅溝）
２７ｂ軸方向直交面（第２の軸方向直交面）
３２入力回転軸
３２ａ小径部
３２ａ１軸方向直交面（第２の軸方向直交面）
３２ｂ大径部
３２ｃ環状凹部
３２ｄ嵌合凹部
３２ｅ不等幅溝（第２の周方向不等幅空間形成部）（第２の不等幅溝）
３２ｆ入力ギヤ
３４リテーナ
３４ａ前壁
３４ｂ挿入孔
３４ｃ嵌合孔
３４ｄ筒状部
３４ｅ取付孔
３６差動コロ（第２の差動回転部材）
３８食付コロ（第２の回転力伝達部材）
４０出力回転軸
４０ａ外周面（第２の回転伝達円筒面）
４２筒状入力回転軸
４２ａ不等幅溝（第２の周方向不等幅空間形成部）（第２の不等幅溝）
５０差動コロ（第２の差動回転部材）
５０ａ５０ｂ円弧部
２００レンズ鏡筒
２０１第１固定環
２０１ａバヨネット部
２０２第２固定環
２０２ａ直進案内溝
２０３固定ねじ
２０４レンズ保持環
２０６固定ねじ
２０８マニュアルフォーカス環（手動操作環）
２０８ａ環状壁
２０８ｂ環状突条（環状重合部）（第１の一方向入出力回転伝達機構）
２１０距離調節環
２１０ａ入力ギヤ
２１０ｂカム溝
２１０ｃ内周面（第１の回転伝達円筒面）（第１の一方向入出力回転伝達機構）
２１１移動環
２１１ａ径方向突起
２１１ｃ取付用ねじ
２１１ｄローラ
２１２収納凹部（第１の一方向入出力回転伝達機構）
２１２ａ軸方向直交面（第１の軸方向直交面）（第１の一方向入出力回転伝達機構）
２１４不等幅溝（第１の周方向不等幅空間形成部）（第１の不等幅溝）（第１の一方向入出力回転伝達機構）
２１６扁平部（第１の周方向不等幅空間形成部）
２１８差動コロ（第１の差動回転部材）（第１の一方向入出力回転伝達機構）
２２０環状部材（第１の押圧部材）（第１の一方向入出力回転伝達機構）
２２０ａ押圧面（第１の押圧面）
２２２板バネ（第１の付勢手段）（第１の一方向入出力回転伝達機構）
２２４食付コロ（第１の回転力伝達部材）（第１の一方向入出力回転伝達機構）
２２６環状保持部材
２２８ベアリングボール
３００レンズ鏡筒
３０２距離調節環
３０２ａ入力ギヤ
３０２ｂカム溝
３０２ｃ内周面（第１の回転伝達円筒面）
ＣＡ１ＣＡ２Ｃ１Ｃ２Ｃ３Ｃ４Ｃ５中心軸
Ｌ１固定レンズ
Ｌ２フォーカスレンズ（移動レンズ）
ＭＡＦ用モータ（モータ）
Ｍ１回転軸
Ｐピニオン（出力ギヤ）
ＲＳ環状空間
Ｓ配設空間
Ｓ１Ｓ２Ｓ３Ｓ４収納空間（第２の周方向不等幅空間）
ＳＳ収納空間（第１の周方向不等幅空間）
Ｕ１一方向入出力回転伝達機構（第１の一方向入出力回転伝達機構）
Ｕ２Ｕ２ａＵ２ｂＵ２ｃ一方向入出力回転伝達機構（第２の一方向入出力回転伝達機構）

3 housing 3a annular flange 3b front wall 3c circular plate 3d window hole 5 rotation shaft 5a small diameter portion 5b large diameter portion 7 input rotation shaft 7a center hole 7b maximum diameter portion 7c intermediate diameter portion 7c1 axially orthogonal surface 7d minimum diameter portion (cross section) Non-circular part)
7d1 side surface (second circumferentially unequal width space forming portion)
7e Input gear 7f Annular recess 9 Bearing ball 11 Retaining plate 13 Fixing screw 15 Cylindrical output rotary shaft 15a Large diameter cylindrical portion 15a1 Inner peripheral surface (second rotational transmission cylindrical surface)
15b Small diameter cylindrical portion 15c Output gear 17 Annular member (second pressing member)
17a Press surface (second press surface)
19 Compression coil spring (second biasing means)
21 Differential roller (second differential rotating member)
23 Eating roller (second rotational force transmission member)
25 Output rotating shaft 25a Outer peripheral surface (second rotational transmission cylindrical surface)
27 Cylindrical input rotation shaft 27a Unequal width groove (second circumferential direction unequal width space forming portion) (second unequal width groove)
27b Axial orthogonal plane (second axial orthogonal plane)
32 Input rotation shaft 32a Small diameter portion 32a1 Axial direction orthogonal surface (second axial direction orthogonal surface)
32b Large diameter portion 32c Annular recess 32d Fitting recess 32e Unequal width groove (second circumferential direction unequal width space forming portion) (second unequal width groove)
32f Input gear 34 Retainer 34a Front wall 34b Insertion hole 34c Fitting hole 34d Cylindrical portion 34e Mounting hole 36 Differential roller (second differential rotation member)
38 Eating roller (second rotational force transmission member)
40 Output rotating shaft 40a Outer peripheral surface (second rotational transmission cylindrical surface)
42 cylindrical input rotation shaft 42a unequal width groove (second circumferential direction unequal width space forming portion) (second unequal width groove)
50 Differential roller (second differential rotating member)
50a 50b Arc portion 200 Lens barrel 201 First fixed ring 201a Bayonet portion 202 Second fixed ring 202a Straight guide groove 203 Fixing screw 204 Lens holding ring 206 Fixing screw 208 Manual focus ring (manual operation ring)
208a Annular wall 208b Annular ridge (annular overlapping part) (first one-way input / output rotation transmission mechanism)
210 Distance adjustment ring 210a Input gear 210b Cam groove 210c Inner peripheral surface (first rotation transmission cylindrical surface) (first one-way input / output rotation transmission mechanism)
211 Moving ring 211a Radial protrusion 211c Mounting screw 211d Roller 212 Storage recess (first one-way input / output rotation transmission mechanism)
212a Axial orthogonal plane (first axial orthogonal plane) (first unidirectional input / output rotation transmission mechanism)
214 Unequal width groove (first circumferential width unequal space forming portion) (first uneven width groove) (first one-way input / output rotation transmission mechanism)
216 flat portion (first circumferential unequal width space forming portion)
218 Differential roller (first differential rotation member) (first one-way input / output rotation transmission mechanism)
220 annular member (first pressing member) (first one-way input / output rotation transmission mechanism)
220a pressing surface (first pressing surface)
222 Leaf spring (first urging means) (first one-way input / output rotation transmission mechanism)
224 Eating roller (first rotational force transmission member) (first one-way input / output rotational transmission mechanism)
226 Annular holding member 228 Bearing ball 300 Lens barrel 302 Distance adjusting ring 302a Input gear 302b Cam groove 302c Inner peripheral surface (first rotation transmission cylindrical surface)
CA1 CA2 C1 C2 C3 C4 C5 Center axis L1 Fixed lens L2 Focus lens (moving lens)
M AF motor (motor)
M1 Rotating shaft P Pinion (Output gear)
RS annular space S installation space S1, S2, S3, S4 storage space (second circumferentially unequal width space)
SS storage space (first circumferential non-uniform width space)
U1 one-way input / output rotation transmission mechanism (first one-way input / output rotation transmission mechanism)
U2 U2a U2b U2c One-way input / output rotation transmission mechanism (second one-way input / output rotation transmission mechanism)

Claims

その軸心回りに回転することにより、移動レンズを光軸方向に進退させる距離調節環と、
手動の回転操作で該距離操作環を回転させる手動操作環と、
上記距離調節環を回転させるモータと、
上記手動操作環の回転力は上記距離調節環に伝達する一方、上記モータによって回転させられた上記距離調節環の回転力は上記手動操作環に伝達しない第１の一方向入出力回転伝達機構と、
を備えるレンズ鏡筒において、
上記第１の一方向入出力回転伝達機構が、
上記手動操作環に設けられた、上記距離調節環と径方向に重合する環状重合部、及び該手動操作環の軸線に対して直交する第１の軸方向直交面と、
上記距離調節環の内周面または外周面に形成した、上記手動操作環の上記環状重合部と対向する第１の回転伝達円筒面と、
上記手動操作環の上記環状重合部に形成した、該第１の回転伝達円筒面との間に周方向で不等幅の第１の周方向不等幅空間を形成する第１の周方向不等幅空間形成部と、
上記第１の周方向不等幅空間に挿入され、第１の付勢手段によって、常に上記第１の軸方向直交面に当接させられ、上記手動操作環の回転に連動して、上記第１の周方向不等幅空間形成部内を、該手動操作環の軸心回りに、該手動操作環に遅れながら同方向に公転する第１の差動回転部材と、
上記第１の周方向不等幅空間に挿入され、該第１の差動回転部材に押されることにより、該第１の差動回転部材と同方向に公転する第１の回転力伝達部材と、を備え、
上記第１の周方向不等幅空間形成部は、周方向に回転した上記第１の回転力伝達部材が、上記第１の周方向不等幅空間形成部と上記第１の回転伝達円筒面の間に食い込み、上記手動操作環の回転力を上記距離調節環に伝達する形状をなしているレンズ鏡筒。 A distance adjustment ring that moves the moving lens back and forth in the direction of the optical axis by rotating around its axis,
A manual operation ring for rotating the distance operation ring by a manual rotation operation;
A motor for rotating the distance adjusting ring;
A rotational force of the manual operation ring is transmitted to the distance adjustment ring, while a rotational force of the distance adjustment ring rotated by the motor is not transmitted to the manual operation ring; ,
In a lens barrel comprising:
The first one-way input / output rotation transmission mechanism is
A ring-shaped overlapping portion that is provided in the manually operated ring and that is polymerized in a radial direction with the distance adjusting ring; and a first axially orthogonal plane that is orthogonal to the axis of the manually operated ring;
A first rotation transmission cylindrical surface that is formed on an inner peripheral surface or an outer peripheral surface of the distance adjusting ring and that faces the annular overlapping portion of the manually operated ring;
A first circumferentially non-uniform width forming a first circumferentially unequal width space having an unequal width in the circumferential direction between the circular rotation portion of the manual operation ring and the first rotation transmission cylindrical surface. An equal width space forming section;
It is inserted into the first circumferential unequal width space, is always brought into contact with the first axially orthogonal plane by the first biasing means, and in conjunction with the rotation of the manual operation ring, the first A first differential rotating member that revolves in the same direction while being delayed from the manual operation ring around the axial center of the manual operation ring in the circumferential direction unequal width space forming portion of 1;
A first rotational force transmitting member that is inserted into the first circumferentially unequal width space and revolves in the same direction as the first differential rotating member by being pushed by the first differential rotating member; With
In the first circumferential direction unequal width space forming portion, the first rotational force transmitting member rotated in the circumferential direction is formed by the first circumferential direction unequal width space forming portion and the first rotation transmitting cylindrical surface. A lens barrel having a shape that bites in between and transmits the rotational force of the manual operation ring to the distance adjustment ring.

請求項１記載のレンズ鏡筒において、
上記第１の周方向不等幅空間に、一対の上記第１の回転力伝達部材を、上記第１の差動回転部材を挟むようにして、上記周方向に並べて挿入したレンズ鏡筒。 The lens barrel according to claim 1,
A lens barrel in which a pair of the first rotational force transmission members are inserted side by side in the circumferential direction so as to sandwich the first differential rotation member in the first circumferential unequal width space.

請求項１または２記載のレンズ鏡筒において、
上記第１の周方向不等幅空間形成部の少なくとも一部が、上記手動操作環の軸線方向を向き、周方向位置によって径方向の深さが異なる第１の不等幅溝によって構成されているレンズ鏡筒。 The lens barrel according to claim 1 or 2,
At least a part of the first circumferentially unequal width space forming portion is configured by a first unequal width groove that faces the axial direction of the manual operation ring and has a radial depth that varies depending on a circumferential position. Lens barrel.

請求項１から３のいずれか１項記載のレンズ鏡筒において、
上記第１の軸方向直交面と対向するとともに平行をなす第１の押圧面を有し、上記第１の付勢手段によって、常に上記第１の軸方向直交面側に付勢され、上記第１の軸方向直交面との間に、上記第１の差動回転部材を挟持する第１の押圧部材を備えるレンズ鏡筒。 In the lens barrel according to any one of claims 1 to 3,
A first pressing surface facing and parallel to the first axially orthogonal surface, and constantly urged toward the first axially orthogonal surface by the first urging means; A lens barrel including a first pressing member that sandwiches the first differential rotating member between the first axially orthogonal plane and the first differential rotating member.

請求項１から４のいずれか１項記載のレンズ鏡筒において、
上記第１の周方向不等幅空間形成部が、上記距離調節環の上記第１の回転伝達円筒面との間に、上記第１の周方向不等幅空間を複数形成するものであり、
各第１の周方向不等幅空間に上記第１の差動回転部材と上記第１の回転力伝達部材を挿入したレンズ鏡筒。 In the lens barrel according to any one of claims 1 to 4,
The first circumferential unequal width space forming portion forms a plurality of the first circumferential unequal width spaces between the first rotation transmission cylindrical surface of the distance adjusting ring,
A lens barrel in which the first differential rotating member and the first rotational force transmitting member are inserted into each first circumferentially unequal width space.

請求項１から５のいずれか１項記載のレンズ鏡筒において、
上記第１の回転力伝達部材が、上記手動操作環の軸線と平行な方向を向く円柱状部材であるレンズ鏡筒。 In the lens barrel according to any one of claims 1 to 5,
A lens barrel in which the first rotational force transmitting member is a columnar member facing in a direction parallel to the axis of the manual operation ring.

請求項１から６のいずれか１項記載のレンズ鏡筒において、
上記距離調節環と上記モータの間に、上記モータの駆動力は距離調節環に伝達するが、上記距離調節環の回転力は上記モータに伝達しない第２の一方向入出力回転伝達機構を備えるレンズ鏡筒。 The lens barrel according to any one of claims 1 to 6,
A second one-way input / output rotation transmission mechanism is provided between the distance adjustment ring and the motor, wherein the driving force of the motor is transmitted to the distance adjustment ring, but the rotational force of the distance adjustment ring is not transmitted to the motor. Lens barrel.

請求項７項記載のレンズ鏡筒において、
上記第２の一方向入出力回転伝達機構が、
上記光軸と平行な軸線に対して直交する第２の軸方向直交面を有し、上記モータによって回転駆動される入力回転軸と、
この入力回転軸が相対回転自在に挿通され、その回転運動と上記距離調節環の回転運動とが連動する筒状出力回転軸と、
上記入力回転軸に形成した、上記筒状出力回転軸内側の第２の回転伝達円筒面との間に周方向で不等幅の第２の周方向不等幅空間を形成する第２の周方向不等幅空間形成部と、
該第２の周方向不等幅空間に挿入され、かつ第２の付勢手段によって常に上記第２の軸方向直交面に当接させられ、上記入力回転軸の回転に連動して、該入力回転軸の軸心を中心に該入力回転軸に遅れながら同方向に公転する複数の第２の差動回転部材と、
上記第２の周方向不等幅空間に移動自在に挿入され、該第２の差動回転部材に押されることにより、該第２の差動回転部材と同方向に公転する第２の回転力伝達部材と、を備え、
上記第２の周方向不等幅空間形成部は、周方向に回転した上記第２の回転力伝達部材が、上記入力回転軸の外周面と上記筒状出力回転軸の上記第２の回転伝達円筒面の間に食い込み、上記入力回転軸の回転力を上記筒状出力回転軸に伝達する形状をなしているレンズ鏡筒。 The lens barrel according to claim 7, wherein
The second one-way input / output rotation transmission mechanism is
An input rotary shaft having a second axially orthogonal plane orthogonal to an axis parallel to the optical axis and rotated by the motor;
A cylindrical output rotary shaft in which the input rotary shaft is inserted so as to be relatively rotatable, and the rotary motion and the rotary motion of the distance adjusting ring are interlocked,
A second circumference that forms a second circumferentially unequal width space having an unequal width in the circumferential direction between the input rotation shaft and the second rotation transmission cylindrical surface inside the cylindrical output rotation shaft. Direction unequal width space forming part,
Inserted into the second circumferentially unequal width space and always brought into contact with the second axially orthogonal plane by the second urging means, and in conjunction with the rotation of the input rotary shaft, the input A plurality of second differential rotating members that revolve in the same direction while being delayed from the input rotating shaft around the axis of the rotating shaft;
A second rotational force that is movably inserted into the second circumferentially unequal width space and revolves in the same direction as the second differential rotating member by being pushed by the second differential rotating member. A transmission member;
In the second circumferential unequal width space forming portion, the second rotational force transmitting member rotated in the circumferential direction is configured such that the second rotational transmission of the outer peripheral surface of the input rotary shaft and the cylindrical output rotary shaft is performed. A lens barrel having a shape that bites between cylindrical surfaces and transmits the rotational force of the input rotation shaft to the cylindrical output rotation shaft.

請求項８記載のレンズ鏡筒において、
上記第２の周方向不等幅空間形成部が、上記入力回転軸の半径方向に直交する少なくとも一つの面を備えた断面非円形部からなっているレンズ鏡筒。 The lens barrel according to claim 8, wherein
The lens barrel in which the second circumferentially unequal width space forming portion is formed of a non-circular cross section having at least one surface orthogonal to the radial direction of the input rotation shaft.

請求項７項記載のレンズ鏡筒において、
上記第２の一方向入出力回転伝達機構が、
上記光軸と平行な軸線に対して直交する第２の軸方向直交面を有し、上記モータによって回転駆動される筒状入力回転軸と、
この筒状入力回転軸に相対回転自在に挿通され、その外周面が第２の回転伝達円筒面をなし、その回転運動と上記距離調節環の回転運動とが連動する出力回転軸と、
上記筒状入力回転軸の内周面に形成した、上記出力回転軸の上記第２の回転伝達円筒面との間に周方向で不等幅の第２の周方向不等幅空間を形成する第２の周方向不等幅空間形成部と、
該第２の周方向不等幅空間に挿入され、かつ第２の付勢手段によって常に上記第２の軸方向直交面に当接させられ、上記筒状入力回転軸の回転に連動して、該筒状入力回転軸の軸心を中心に該筒状入力回転軸に遅れながら同方向に公転する複数の第２の差動回転部材と、
上記第２の周方向不等幅空間に移動自在に挿入され、該第２の差動回転部材に押されることにより、該第２の差動回転部材と同方向に公転する第２の回転力伝達部材と、を備え、
上記第２の周方向不等幅空間形成部は、周方向に回転した上記第２の回転力伝達部材が、上記筒状入力回転軸の内周面と上記出力回転軸の第２の回転伝達円筒面の間に食い込み、上記筒状入力回転軸の回転力を上記出力回転軸に伝達する形状をなしているレンズ鏡筒。 The lens barrel according to claim 7, wherein
The second one-way input / output rotation transmission mechanism is
A cylindrical input rotating shaft that has a second axially orthogonal plane orthogonal to an axis parallel to the optical axis and is rotated by the motor;
An output rotary shaft that is inserted into the cylindrical input rotary shaft so as to be relatively rotatable, an outer peripheral surface thereof forms a second rotation transmission cylindrical surface, and the rotary motion and the rotary motion of the distance adjusting ring are linked to each other;
A second circumferentially unequal width space having an unequal width in the circumferential direction is formed between the output rotational shaft and the second rotation transmission cylindrical surface formed on the inner peripheral surface of the cylindrical input rotational shaft. A second circumferentially unequal width space forming part;
Inserted into the second circumferentially unequal width space, and always brought into contact with the second axially orthogonal plane by the second biasing means, in conjunction with the rotation of the cylindrical input rotary shaft, A plurality of second differential rotation members that revolve in the same direction while being delayed from the cylindrical input rotation shaft about the axis of the cylindrical input rotation shaft;
A second rotational force that is movably inserted into the second circumferentially unequal width space and revolves in the same direction as the second differential rotating member by being pushed by the second differential rotating member. A transmission member;
In the second circumferential unequal width space forming part, the second rotational force transmitting member rotated in the circumferential direction is configured such that the second rotational transmission of the inner peripheral surface of the cylindrical input rotary shaft and the output rotary shaft is performed. A lens barrel that has a shape that bites between cylindrical surfaces and transmits the rotational force of the cylindrical input rotary shaft to the output rotary shaft.

請求項８から１０記載のレンズ鏡筒において、
上記第２の周方向不等幅空間に、一対の上記第２の回転力伝達部材を、上記第２の差動回転部材を挟むようにして、上記周方向に並べて挿入したレンズ鏡筒。 The lens barrel according to claim 8, wherein
A lens barrel in which a pair of the second rotational force transmitting members are inserted side by side in the circumferential direction so as to sandwich the second differential rotating member in the second circumferentially unequal width space.

請求項８から１１のいずれか１項記載のレンズ鏡筒において、
上記第２の周方向不等幅空間形成部が、上記筒状出力回転軸または上記出力回転軸の上記第２の回転伝達円筒面との間に、上記第２の周方向不等幅空間を複数形成するものであり、
各第２の周方向不等幅空間に上記第２の差動回転部材と上記第２の回転力伝達部材を挿入したレンズ鏡筒。 The lens barrel according to any one of claims 8 to 11,
The second circumferential unequal width space forming portion forms the second circumferential unequal width space between the cylindrical output rotation shaft or the second rotation transmission cylindrical surface of the output rotation shaft. To form multiple,
A lens barrel in which the second differential rotating member and the second rotational force transmitting member are inserted into each second circumferentially unequal width space.

請求項７項記載のレンズ鏡筒において、
上記第２の一方向入出力回転伝達機構が、
上記光軸と平行な軸線に対して直交する第２の軸方向直交面を有し、上記モータによって回転駆動される入力回転軸と、
この入力回転軸が相対回転自在に挿通され、その内周面が、上記入力回転軸の外周円との間に環状空間を形成する第２の回転伝達円筒面をなし、かつ、その回転運動と上記距離調節環の回転運動とが連動する筒状出力回転軸と、
上記入力回転軸に形成した、上記第２の回転伝達円筒面との間に、上記環状空間の一部をなす周方向で不等幅の第２の周方向不等幅空間を形成する第２の周方向不等幅空間形成部と、
該第２の周方向不等幅空間に挿入され、かつ第２の付勢手段によって常に上記第２の軸方向直交面に当接させられ、上記入力回転軸の回転に連動して、該入力回転軸の軸心を中心に該入力回転軸に遅れながら同方向に公転する複数の第２の差動回転部材と、
上記環状空間に挿入され、該第２の差動回転部材に押圧されることにより、該第２の差動回転部材と同方向に公転するリテーナと、
該リテーナに保持され、上記第２の周方向不等幅空間内を該リテーナと一緒に回転する第２の回転力伝達部材と、を備え、
上記第２の周方向不等幅空間形成部は、周方向に回転した上記第２の回転力伝達部材が、上記入力回転軸の外周面と上記筒状出力回転軸の上記第２の回転伝達円筒面の間に食い込み、上記入力回転軸の回転力を上記筒状出力回転軸に伝達する形状をなしているレンズ鏡筒。 The lens barrel according to claim 7, wherein
The second one-way input / output rotation transmission mechanism is
An input rotary shaft having a second axially orthogonal plane orthogonal to an axis parallel to the optical axis and rotated by the motor;
The input rotary shaft is inserted in a relatively rotatable manner, and the inner peripheral surface thereof forms a second rotation transmission cylindrical surface that forms an annular space with the outer peripheral circle of the input rotary shaft, and the rotational motion thereof A cylindrical output rotating shaft in conjunction with the rotational movement of the distance adjusting ring;
A second circumferentially unequal width space having a non-uniform width in the circumferential direction forming a part of the annular space is formed between the input rotation shaft and the second rotation transmission cylindrical surface. A circumferentially unequal width space forming part,
Inserted into the second circumferentially unequal width space and always brought into contact with the second axially orthogonal plane by the second urging means, and in conjunction with the rotation of the input rotary shaft, the input A plurality of second differential rotating members that revolve in the same direction while being delayed from the input rotating shaft around the axis of the rotating shaft;
A retainer that is inserted into the annular space and revolves in the same direction as the second differential rotation member by being pressed by the second differential rotation member;
A second rotational force transmission member held by the retainer and rotating together with the retainer in the second circumferential unequal width space;
In the second circumferential unequal width space forming portion, the second rotational force transmitting member rotated in the circumferential direction is configured such that the second rotational transmission of the outer peripheral surface of the input rotary shaft and the cylindrical output rotary shaft is performed. A lens barrel having a shape that bites between cylindrical surfaces and transmits the rotational force of the input rotation shaft to the cylindrical output rotation shaft.

請求項７項記載のレンズ鏡筒において、
上記第２の一方向入出力回転伝達機構が、
上記光軸と平行な軸線に対して直交する第２の軸方向直交面を有し、上記モータによって回転駆動される筒状入力回転軸と、
この筒状入力回転軸に相対回転自在に挿通され、その外周面が、上記筒状入力回転軸の内周面との間に環状空間を形成する第２の回転伝達円筒面をなし、かつ、その回転運動と上記距離調節環の回転運動とが連動する出力回転軸と、
上記筒状入力回転軸の内周面に形成した、上記第２の回転伝達円筒面との間に、上記環状空間の一部をなす周方向で不等幅の第２の周方向不等幅空間を形成する第２の周方向不等幅空間形成部と、
該第２の周方向不等幅空間に挿入され、かつ第２の付勢手段によって常に上記第２の軸方向直交面に当接させられ、上記筒状入力回転軸の回転に連動して、該筒状入力回転軸の軸心を中心に該筒状入力回転軸に遅れながら同方向に公転する複数の第２の差動回転部材と、
上記環状空間に挿入され、該第２の差動回転部材に押圧されることにより、該第２の差動回転部材と同方向に公転するリテーナと、
該リテーナに保持され、上記第２の周方向不等幅空間内を該リテーナと一緒に回転する第２の回転力伝達部材と、を備え、
上記第２の周方向不等幅空間形成部は、周方向に回転した上記第２の回転力伝達部材が、上記筒状入力回転軸の内周面と上記出力回転軸の上記第２の回転伝達円筒面の間に食い込み、上記筒状入力回転軸の回転力を上記出力回転軸に伝達する形状をなしているレンズ鏡筒。 The lens barrel according to claim 7, wherein
The second one-way input / output rotation transmission mechanism is
A cylindrical input rotating shaft that has a second axially orthogonal plane orthogonal to an axis parallel to the optical axis and is rotated by the motor;
The cylindrical input rotary shaft is inserted in a relatively rotatable manner, and the outer peripheral surface forms a second rotation transmission cylindrical surface that forms an annular space with the inner peripheral surface of the cylindrical input rotary shaft, and An output rotation axis in which the rotational movement and the rotational movement of the distance adjusting ring are linked,
A second circumferential unequal width in the circumferential direction that forms a part of the annular space between the second rotation transmission cylindrical surface formed on the inner circumferential surface of the cylindrical input rotation shaft. A second circumferentially unequal width space forming portion that forms a space;
Inserted into the second circumferentially unequal width space, and always brought into contact with the second axially orthogonal plane by the second biasing means, in conjunction with the rotation of the cylindrical input rotary shaft, A plurality of second differential rotation members that revolve in the same direction while being delayed from the cylindrical input rotation shaft about the axis of the cylindrical input rotation shaft;
A retainer that is inserted into the annular space and revolves in the same direction as the second differential rotation member by being pressed by the second differential rotation member;
A second rotational force transmission member held by the retainer and rotating together with the retainer in the second circumferential unequal width space;
In the second circumferentially unequal width space forming portion, the second rotational force transmitting member rotated in the circumferential direction is configured such that the second rotation of the cylindrical input rotary shaft and the output rotary shaft is the second rotation. A lens barrel having a shape that bites between transmission cylindrical surfaces and transmits the rotational force of the cylindrical input rotation shaft to the output rotation shaft.

請求項８から１４のいずれか１項記載のレンズ鏡筒において、
上記第２の軸方向直交面と対向するとともに平行をなす第２の押圧面を有し、上記第２の付勢手段によって、常に上記第２の軸方向直交面側に付勢され、上記第２の軸方向直交面との間に、上記第２の差動回転部材を挟持する第２の押圧部材を備えるレンズ鏡筒。 The lens barrel according to any one of claims 8 to 14,
The second pressing surface is opposite to and parallel to the second axially orthogonal surface, and is always urged toward the second axially orthogonal surface by the second urging means, A lens barrel comprising a second pressing member that sandwiches the second differential rotating member between two axially orthogonal surfaces.

請求項１３から１５のいずれか１項記載のレンズ鏡筒において、
上記第２の周方向不等幅空間形成部が、上記筒状出力回転軸または上記出力回転軸の上記第２の回転伝達円筒面との間に、上記第２の周方向不等幅空間を複数形成するものであり、
各第２の周方向不等幅空間に上記第２の回転力伝達部材を挿入したレンズ鏡筒。 The lens barrel according to any one of claims 13 to 15,
The second circumferential unequal width space forming portion forms the second circumferential unequal width space between the cylindrical output rotation shaft or the second rotation transmission cylindrical surface of the output rotation shaft. To form multiple,
A lens barrel in which the second rotational force transmitting member is inserted into each second circumferentially unequal width space.

請求項１０から１６のいずれか１項記載のレンズ鏡筒において、
上記第２の周方向不等幅空間形成部が、上記筒状入力回転軸または上記入力回転軸の軸線方向を向き、周方向位置によって径方向の深さが異なる第２の不等幅溝であるレンズ鏡筒。 The lens barrel according to any one of claims 10 to 16,
The second circumferential unequal width space forming portion is a second unequal width groove that faces the axial direction of the cylindrical input rotary shaft or the input rotary shaft and has a radial depth that varies depending on a circumferential position. A lens barrel.

請求項８から１７のいずれか１項記載のレンズ鏡筒において、
上記入力回転軸または上記筒状入力回転軸に、上記モータの出力ギヤと噛合する入力ギヤを設け、上記筒状出力回転軸または上記出力回転軸の回転停止時に、該モータを、該回転停止時の直前における回転方向とは逆方向に、該入力ギヤと該出力ギヤのバックラッシュより小さい回転角だけ回転させて、上記筒状出力回転軸または上記出力回転軸を回転させることなく、上記入力回転軸または上記筒状入力回転軸を、上記回転停止時の直前における回転方向とは逆方向に回転させるレンズ鏡筒。 The lens barrel according to any one of claims 8 to 17,
The input rotary shaft or the cylindrical input rotary shaft is provided with an input gear that meshes with the output gear of the motor, and the motor is turned off when the cylindrical output rotary shaft or the output rotary shaft is stopped. The input rotation without rotating the cylindrical output rotation shaft or the output rotation shaft by rotating the input gear and the output gear by a rotation angle smaller than the backlash of the input gear in a direction opposite to the rotation direction immediately before the rotation. A lens barrel that rotates the shaft or the cylindrical input rotation shaft in a direction opposite to the rotation direction immediately before the rotation is stopped.

請求項８から１８のいずれか１項記載のレンズ鏡筒において、
上記第２の回転力伝達部材が、上記入力回転軸または上記筒状入力回転軸の軸線と平行な方向を向く円柱状部材であるレンズ鏡筒。 The lens barrel according to any one of claims 8 to 18,
A lens barrel in which the second rotational force transmitting member is a cylindrical member that faces in a direction parallel to the input rotation shaft or the axis of the cylindrical input rotation shaft.

請求項１から１９のいずれか１項記載のレンズ鏡筒において、
上記移動レンズがフォーカスレンズであり、
上記モータがＡＦ用モータであり、
上記手動操作環がマニュアルフォーカス環であるレンズ鏡筒。 The lens barrel according to any one of claims 1 to 19,
The moving lens is a focus lens,
The motor is an AF motor,
A lens barrel in which the manual operation ring is a manual focus ring.

請求項１から１９のいずれか１項記載のレンズ鏡筒において、
上記移動レンズがズームレンズであり、
上記モータがズーム用モータであり、
上記手動操作環がズーム環であるレンズ鏡筒。

The lens barrel according to any one of claims 1 to 19,
The moving lens is a zoom lens,
The motor is a zoom motor,
A lens barrel in which the manual operation ring is a zoom ring.