JP2007108460A

JP2007108460A - Lens shifting apparatus for optical mechanism

Info

Publication number: JP2007108460A
Application number: JP2005299688A
Authority: JP
Inventors: Hikari Maehashi; 光前橋
Original assignee: Cosina Co Ltd
Current assignee: Cosina Co Ltd
Priority date: 2005-10-14
Filing date: 2005-10-14
Publication date: 2007-04-26
Anticipated expiration: 2025-10-14
Also published as: JP4911944B2

Abstract

<P>PROBLEM TO BE SOLVED: To easily and accurately realize the shift position and home position of a projection lens by constituting a manual operation part so that clear and good clicking sense can be obtained. <P>SOLUTION: In transmission mechanism parts 6x and 6y, motion conversion mechanisms 7x and 7y are provided respectively, to shift one of mutually engaged nut members 7nx and 7ny and screw members 7sx and 7sy in an axial direction by rotating the other, and also, clicking mechanisms 8x and 8y having engagement recessed parts 8ux,... obtained by partly notching the screw thread 7smx,... in the prescribed axial position of the screw members 7sx and 7sy, and engagement bodies 8sx,... energized by elastic members 8dx,... so as to be engaged with the engagement recessed parts 8ux,... are provided, respectively. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、投射レンズの位置を水平方向及び／又は垂直方向へシフトさせる光学機構のレンズシフト装置に関する。 The present invention relates to a lens shift device of an optical mechanism that shifts a position of a projection lens in a horizontal direction and / or a vertical direction.

一般に、スクリーンに画像を投影するプロジェクタでは、スクリーンの正確な位置に画像を投影する必要がある。 Generally, in a projector that projects an image on a screen, it is necessary to project the image at an accurate position on the screen.

このため、投射レンズの位置を水平方向及び／又は垂直方向へシフトさせて画像位置を調整するレンズシフト装置を内蔵するプロジェクタも知られており、例えば、特開２００５−１７３４６０号公報には、投射レンズをレンズ台により支持するとともに、このレンズ台の一側に配したシフト用レールに、レンズ台の一方に設けた一対の離間した装填部をスライド自在に装填するとともに、レンズ台の他側に配したシフト用スクリュに、レンズ台の他方に設けた一対の離間した螺合部を螺合させ、シフト用スクリュをシフト駆動部で回転させてレンズ台をシフト用レールに沿って移動させるようにしたレンズシフト機能付プロジェクタが開示されている。
特開２００５−１７３４６０号 For this reason, a projector incorporating a lens shift device that adjusts the image position by shifting the position of the projection lens in the horizontal direction and / or the vertical direction is also known. For example, Japanese Patent Application Laid-Open No. 2005-173460 discloses a projector. The lens is supported by the lens base, and a pair of spaced mounting parts provided on one side of the lens base is slidably loaded on the shift rail disposed on one side of the lens base, and on the other side of the lens base. A pair of spaced-apart screwing portions provided on the other side of the lens base are screwed into the shift screw arranged, and the lens base is moved along the shift rail by rotating the shift screw by the shift driving portion. A projector with a lens shift function is disclosed.
JP-A-2005-173460

ところで、上述した従来のレンズシフト装置は、モータ等のシフト駆動部を利用して動力によりシストさせるものである。このため、手動により操作する手動タイプとして構成する場合には、次のような不具合を生じる問題があった。 By the way, the above-described conventional lens shift device uses a shift driving unit such as a motor to perform cysting by power. For this reason, in the case of configuring as a manual type operated manually, there is a problem that causes the following problems.

第一に、モータ等を利用した場合には、位置センサ等によりシフト位置或いはホームポジションに対する位置出しを容易に行うことができるが、手動タイプとした場合、位置出しを容易に行うことができない。即ち、手動タイプでは、通常、クリック機構を設け、クリック感を得ることにより所定の位置を知ることができるが、プロジェクタの場合、投射レンズの重量が比較的大きく、操作時にはダイヤルを複数回転させるなどの操作が必要になる。このため、ダイヤル側には、事実上、クリック機構を設けることができないとともに、他方、投射レンズ側にクリック機構を設けてもダイヤル側では明確なクリック感を得ることができず、結局、品質感のある良好なクリック機構を実現できない。 First, when a motor or the like is used, positioning with respect to a shift position or a home position can be easily performed by a position sensor or the like, but when using a manual type, positioning cannot be easily performed. That is, in the manual type, a click mechanism is usually provided and a predetermined position can be obtained by obtaining a click feeling. However, in the case of a projector, the weight of the projection lens is relatively large, and the dial is rotated several times during operation. Operation is required. For this reason, a click mechanism cannot be provided on the dial side, and on the other hand, even if a click mechanism is provided on the projection lens side, a clear click feeling cannot be obtained on the dial side. It is not possible to realize a good click mechanism with

第二に、ガイド機構は、レンズ台の一側に配したシフト用レールに一対の離間した軸受孔部をスライド自在に装填する構成のため全体の構成が複雑化し、大型化及びコストアップを招くとともに、レンズ台の軸平行方向に対して僅かに傾斜した応力が付加されてもレールと軸受孔部間の作動抵抗（摩擦抵抗等）が急激に大きくなり、スムーズなシフト移動を確保しにくい。 Second, since the guide mechanism is configured to slidably load a pair of spaced bearing holes on a shift rail disposed on one side of the lens base, the overall structure becomes complicated, leading to an increase in size and cost. At the same time, even if stress slightly inclined with respect to the axis parallel direction of the lens base is applied, the operating resistance (friction resistance, etc.) between the rail and the bearing hole portion increases rapidly, making it difficult to ensure smooth shift movement.

本発明は、このような背景技術に存在する課題を解決した光学機構のレンズシフト装置の提供を目的とするものである。 The object of the present invention is to provide a lens shift device of an optical mechanism that solves the problems existing in the background art.

本発明に係る光学機構（プロジェクタＰ）のレンズシフト装置１は、上述した課題を解決するため、投射レンズ２を支持するレンズ支持部３を水平方向及び／又は垂直方向へガイドするガイド機構４ｘ，４ｙを有する支持機構部４と、手動により操作する手動操作部５ｘ，５ｙと、この手動操作部５ｘ，５ｙの操作量を支持機構部４に伝達してレンズ支持部３を水平方向及び／又は垂直方向へシフトさせる伝達機構部６ｘ，６ｙを備えるレンズシフト装置であって、伝達機構部６ｘ，６ｙに、相螺合するスクリュ部材７ｓｘ，７ｓｙとナット部材７ｎｘ，７ｎｙの一方を回転させることにより他方を軸方向へ変位させる運動変換機構７ｘ，７ｙを設けるとともに、スクリュ部材７ｓｘ，７ｓｙの軸方向所定位置のネジ山部７ｓｍｘ…の一部を切欠いた係合凹部８ｕｘ…とこの係合凹部８ｕｘ…に係合する方向に弾性部材８ｄｘ…により付勢された係合体８ｓｘ…を有するクリック機構８ｘ，８ｙを設けたことを特徴とする。 In order to solve the above-described problem, the lens shift device 1 of the optical mechanism (projector P) according to the present invention guides the lens support portion 3 that supports the projection lens 2 in the horizontal direction and / or the vertical direction. The support mechanism unit 4 having 4y, the manual operation units 5x and 5y operated manually, and the operation amount of the manual operation units 5x and 5y are transmitted to the support mechanism unit 4 so that the lens support unit 3 is moved in the horizontal direction and / or A lens shift device including transmission mechanism portions 6x and 6y that shifts in the vertical direction by rotating one of screw members 7sx and 7sy and nut members 7nx and 7ny that are engaged with the transmission mechanism portions 6x and 6y. While providing the motion conversion mechanisms 7x and 7y for displacing the other in the axial direction, a part of the screw thread portions 7smx... At predetermined positions in the axial direction of the screw members 7sx and 7sy Lacking engagement recess 8Ux ... and the engaging recess 8Ux ... elastic member in a direction to engage the 8Dx ... by biased engagement body 8Sx ... click mechanism 8x having, characterized in that a 8y.

この場合、発明の好適な態様により、クリック機構８ｘ，８ｙは、係合体８ｓｘ…及び弾性部材８ｄｘ…を、ナット部材７ｎｘ，７ｎｙの径方向に形成した収容孔１１ｘ…に収容し、収容孔１１ｘ…の外側開口を閉塞部材１２ｘ…で閉塞して構成できる。また、伝達機構部６ｘ，６ｙには、手動操作部５ｘ，５ｙの操作量をスクリュ部材７ｓｘ，７ｓｙに伝達するとともに、手動操作部５ｘ，５ｙの操作方向と投射レンズ２の変位方向を適合させる中間ギア機構１３ｘ，１３ｙを設けることができる。 In this case, according to a preferred aspect of the invention, the click mechanism 8x, 8y accommodates the engaging bodies 8sx ... and the elastic members 8dx ... in the accommodation holes 11x formed in the radial direction of the nut members 7nx, 7ny, and the accommodation holes 11x. The outer opening of... Can be closed with a closing member 12x. Further, the transmission mechanisms 6x and 6y transmit the operation amount of the manual operation units 5x and 5y to the screw members 7sx and 7sy, and the operation direction of the manual operation units 5x and 5y and the displacement direction of the projection lens 2 are adapted. Intermediate gear mechanisms 13x and 13y can be provided.

一方、本発明に係る光学機構（プロジェクタＰ）のレンズシフト装置１は、上述した課題を解決するため、投射レンズ２を支持するレンズ支持部３を水平方向及び／又は垂直方向へガイドするガイド機構４ｘ，４ｙを有する支持機構部４と、手動により操作する手動操作部５ｘ，５ｙと、この手動操作部５ｘ，５ｙの操作量を支持機構部４に伝達してレンズ支持部３を水平方向及び／又は垂直方向へシフトさせる伝達機構部６ｘ，６ｙを備えるレンズシフト装置であって、支持機構部４に、少なくともレンズ支持部３の前面に配した可動フレーム部２１を設けるとともに、レンズ支持部３と可動フレーム部２１の一方に、底部２２ｄが断面Ｖ形となる所定長さの凹溝部２２を形成し、かつ他方に、先端部２３ｓが断面Ｖ形となり、凹溝部２２に係合する所定長さの凸条部２３を形成することにより、レンズ支持部３を垂直方向（又は水平方向）にのみ変位を許容する第一ガイド機構４ｙを設けたことを特徴とする。 On the other hand, the lens shift device 1 of the optical mechanism (projector P) according to the present invention guides the lens support portion 3 that supports the projection lens 2 in the horizontal direction and / or the vertical direction in order to solve the above-described problem. The support mechanism unit 4 having 4x and 4y, the manual operation units 5x and 5y that are manually operated, and the operation amount of the manual operation units 5x and 5y are transmitted to the support mechanism unit 4 so that the lens support unit 3 is moved in the horizontal direction and The lens shift device includes transmission mechanism units 6x and 6y that shift in the vertical direction. The support mechanism unit 4 is provided with a movable frame unit 21 disposed at least on the front surface of the lens support unit 3 and the lens support unit 3 A groove 22 having a predetermined length with a bottom 22d having a V-shaped cross section is formed on one side of the movable frame 21, and a tip 23s has a V-shaped cross section on the other. By forming a predetermined length of the convex portion 23 to be engaged, characterized in that a first guide mechanism 4y only allows a displacement of the lens supporting portion 3 in the vertical direction (or horizontal direction).

この場合、発明の好適な態様により、支持機構部４には、可動フレーム部２１の前面に配した固定フレーム部２５を設けるとともに、可動フレーム部２１と固定フレーム部２５の一方に所定長さの凹溝部２６を形成し、かつ他方に凹溝部２６に係合する所定長さの凸条部２７を形成することにより、可動フレーム部２１を水平方向（又は垂直方向）にのみ変位を許容する第二ガイド機構４ｘを設けることができる。なお、第二ガイド機構４ｘには、可動フレーム部２１と固定フレーム部２５の一方に、底部２６ｄが断面Ｖ形となる所定長さの凹溝部２６を形成し、かつ他方に、先端部２７ｓが断面Ｖ形となり、凹溝部２６に係合する所定長さの凸条部２７を形成することができる。また、伝達機構部６ｘ，６ｙには、相螺合するスクリュ部材７ｓｘ，７ｓｙとナット部材７ｎｘ，７ｎｙの一方を回転させることにより他方を軸方向へ変位させる運動変換機構７ｘ，７ｙを設けるとともに、スクリュ部材７ｓｘ，７ｓｙの軸方向所定位置のネジ山部７ｓｍｘ…の一部を切欠いた係合凹部８ｕｘ…とこの係合凹部８ｕｘ…に係合する方向に弾性部材８ｄｘ…により付勢された係合体８ｓｘ…を有するクリック機構８ｘ，８ｙを設けることができる。 In this case, according to a preferred aspect of the invention, the support mechanism portion 4 is provided with a fixed frame portion 25 disposed on the front surface of the movable frame portion 21, and one of the movable frame portion 21 and the fixed frame portion 25 has a predetermined length. By forming the concave groove portion 26 and, on the other side, the convex ridge portion 27 having a predetermined length to be engaged with the concave groove portion 26, the movable frame portion 21 is allowed to be displaced only in the horizontal direction (or the vertical direction). A two-guide mechanism 4x can be provided. In the second guide mechanism 4x, a concave groove portion 26 having a predetermined length with a bottom portion 26d having a V-shaped cross section is formed in one of the movable frame portion 21 and the fixed frame portion 25, and the tip portion 27s is formed on the other side. The ridge 27 having a predetermined length that is V-shaped in cross section and engages with the groove 26 can be formed. In addition, the transmission mechanism portions 6x and 6y are provided with motion conversion mechanisms 7x and 7y that rotate one of the screw members 7sx and 7sy and the nut members 7nx and 7ny that are engaged with each other to displace the other in the axial direction. The engagement recesses 8ux ... notched in a part of the screw thread portions 7smx ... at predetermined positions in the axial direction of the screw members 7sx, 7sy, and the engagement biased by the elastic members 8dx ... in a direction to engage with the engagement recesses 8ux ... Click mechanisms 8x, 8y having combined 8sx... Can be provided.

このような構成を有する本発明に係る光学機構のレンズシフト装置１によれば、次のような顕著な効果を奏する。 According to the lens shift device 1 of the optical mechanism according to the present invention having such a configuration, the following remarkable effects can be obtained.

（１）伝達機構部６ｘ…に、相螺合するスクリュ部材７ｓｘ…とナット部材７ｎｘ…の一方を回転させることにより他方を変位させる運動変換機構７ｘ…を設けるとともに、スクリュ部材７ｓｘ…の所定位置のネジ山部７ｓｍｘ…の一部を切欠いた係合凹部８ｕｘ…とこの係合凹部８ｕｘ…に係合する方向に弾性部材８ｄｘ…により付勢された係合体８ｓｘ…を有するクリック機構８ｘ…を設けたため、手動操作部５ｘ…側において、投射レンズ２のシフト位置或いはホームポジションＰｈにおける明確かつ良質のクリック感を得ることができ、投射レンズ２のシフト位置或いはホームポジションＰｈに対する容易かつ正確な位置出しを行うことができる。 (1) The transmission mechanism 6x ... is provided with a motion conversion mechanism 7x ... for displacing the other by rotating one of the screw members 7sx ... and the nut member 7nx ..., and a predetermined position of the screw member 7sx ... A click mechanism 8x having an engaging concave portion 8ux ... in which a part of the screw thread portion 7smx ... is cut out and an engaging body 8sx biased by an elastic member 8dx in a direction to engage with the engaging concave portion 8ux ... Since it is provided, a clear and high-quality click feeling at the shift position or home position Ph of the projection lens 2 can be obtained on the manual operation unit 5x..., And an easy and accurate position with respect to the shift position or home position Ph of the projection lens 2 can be obtained. Can be made.

（２）支持機構部４に、少なくともレンズ支持部３の前面に配した可動フレーム部２１を設けるとともに、レンズ支持部３と可動フレーム部２１の一方に、底部２２ｄが断面Ｖ形となる所定長さの凹溝部２２を形成し、かつ他方に、先端部２３ｓが断面Ｖ形となり、凹溝部２２に係合する所定長さの凸条部２３を形成することにより、レンズ支持部３を垂直方向（又は水平方向）にのみ変位を許容する第一ガイド機構４ｙを設けたため、構成の単純化による機構全体の小型化及びコストダウンを図れるという基本的メリットを享受できるとともに、断面Ｖ形に形成した底部２２ｄと先端部２３ｓが線接触するため、凹溝部２２と凸条部２３間の隙間によるガタつきを阻止して、高精密でスムーズなシフト移動を実現できる。 (2) The support mechanism unit 4 is provided with a movable frame portion 21 disposed at least on the front surface of the lens support portion 3, and a predetermined length with a bottom 22 d having a V-shaped cross section on one of the lens support portion 3 and the movable frame portion 21. A concave groove portion 22 is formed, and on the other side, the tip portion 23s has a V-shaped cross section, and a convex strip portion 23 having a predetermined length that engages with the concave groove portion 22 is formed. Since the first guide mechanism 4y that allows displacement only in (or in the horizontal direction) is provided, the basic merit that the overall mechanism can be reduced in size and the cost can be reduced by simplifying the configuration, and the V-shaped section is formed. Since the bottom portion 22d and the tip portion 23s are in line contact with each other, it is possible to prevent backlash due to the gap between the groove portion 22 and the ridge portion 23, thereby realizing a highly precise and smooth shift movement.

（３）好適な態様により、クリック機構８ｘ…を構成するに際して、係合体８ｓｘ…及び弾性部材８ｄｘ…を、ナット部材７ｎｘ…の径方向に形成した収容孔１１ｘ…に収容し、収容孔１１ｘ…の外側開口を閉塞部材１２ｘ…で閉塞すれば、クリック機構８ｘ…を容易かつコンパクトに構成することができる。 (3) When the click mechanism 8x is configured according to a preferred embodiment, the engaging bodies 8sx and the elastic members 8dx are accommodated in the accommodating holes 11x formed in the radial direction of the nut members 7nx, and the accommodating holes 11x are formed. If the outer opening is closed with the closing members 12x, the click mechanism 8x can be easily and compactly configured.

（４）好適な態様により、伝達機構部６ｘ…に、手動操作部５ｘ…の操作量をスクリュ部材７ｓｘ…に伝達するとともに、手動操作部５ｘ…の操作方向と投射レンズ２の変位方向を適合させる中間ギア機構１３ｘ…を設ければ、手動操作部５ｘ…の操作方向と投射レンズ２の変位方向が同方向となるため、操作時の違和感を無くすことができる。 (4) According to a preferred mode, the operation amount of the manual operation unit 5x is transmitted to the transmission mechanism 6x to the screw member 7sx, and the operation direction of the manual operation unit 5x and the displacement direction of the projection lens 2 are adapted. If the intermediate gear mechanism 13x to be provided is provided, the operation direction of the manual operation unit 5x and the displacement direction of the projection lens 2 are the same direction, so that it is possible to eliminate a sense of discomfort during operation.

（５）好適な態様により、支持機構部４に、可動フレーム部２１の前面に配した固定フレーム部２５を設けるとともに、可動フレーム部２１と固定フレーム部２５の一方に所定長さの凹溝部２６を形成し、かつ他方に凹溝部２６に係合する所定長さの凸条部２７を形成することにより、可動フレーム部２１を水平方向（又は垂直方向）にのみ変位を許容する第二ガイド機構４ｘを設ければ、水平方向と垂直方向の双方のシフト機構を容易かつコンパクトに実現できる。 (5) According to a preferred embodiment, the support mechanism portion 4 is provided with a fixed frame portion 25 disposed on the front surface of the movable frame portion 21, and a concave groove portion 26 having a predetermined length is provided on one of the movable frame portion 21 and the fixed frame portion 25. And a second guide mechanism that allows displacement of the movable frame portion 21 only in the horizontal direction (or vertical direction) by forming a convex strip portion 27 having a predetermined length that engages the concave groove portion 26 on the other side. If 4x is provided, both horizontal and vertical shift mechanisms can be realized easily and compactly.

（６）好適な態様により、第二ガイド機構４ｘに、可動フレーム部２１と固定フレーム部２５の一方に、底部２６ｄが断面Ｖ形となる所定長さの凹溝部２６を形成し、かつ他方に、先端部２７ｓが断面Ｖ形となり、凹溝部２６に係合する所定長さの凸条部２７を形成すれば、断面Ｖ形に形成した底部２６ｄと先端部２７ｓが線接触するため、凹溝部２６と凸条部２７間の隙間によるガタつきをより確実に阻止して、高精密でスムーズなシフト移動を実現できる。 (6) According to a preferred embodiment, the second guide mechanism 4x is formed with a concave groove portion 26 having a predetermined length with a bottom portion 26d having a V-shaped cross section on one side of the movable frame portion 21 and the fixed frame portion 25, and on the other side. When the tip 27s has a V-shaped cross section and the protrusion 27 having a predetermined length that engages with the groove 26 is formed, the bottom 26d formed in the V-shape and the tip 27s are in line contact with each other. It is possible to more surely prevent backlash due to the gap between the ridges 26 and the ridges 27 and realize a highly precise and smooth shift movement.

（７）好適な態様により、伝達機構部６ｘ…に、相螺合するスクリュ部材７ｓｘ…とナット部材７ｎｘ…の一方を回転させることにより他方を軸方向へ変位させる運動変換機構７ｘ…を設けるとともに、スクリュ部材７ｓｘ…の軸方向所定位置のネジ山部７ｓｍｘ…の一部を切欠いた係合凹部８ｕｘ…とこの係合凹部８ｕｘ…に係合する方向に弾性部材８ｄｘ…により付勢された係合体８ｓｘ…を有するクリック機構８ｘ…を設ければ、支持機構部４におけるガタつきのない高精密でスムーズなシフト移動に加え、投射レンズ２のシフト位置或いはホームポジションＰｈにおける明確かつ良質のクリック感を得れるという相乗効果により、シフト機構全体の操作フィーリング及び品質感をより高めることができる。 (7) According to a preferred embodiment, the transmission mechanism 6x... Is provided with a motion conversion mechanism 7x... That displaces the other in the axial direction by rotating one of the screw members 7sx. , And the engagement member 8sx in a predetermined position in the axial direction of the screw member 7sx... And the engagement member 8sx... If the click mechanism 8x ... having the combined 8sx ... is provided, in addition to the high-precision and smooth shift movement without backlash in the support mechanism section 4, a clear and high-quality click feeling at the shift position of the projection lens 2 or the home position Ph is obtained. Due to the synergistic effect that can be obtained, the operational feeling and quality of the entire shift mechanism can be further enhanced.

次に、本発明に係る最良の実施形態を挙げ、図面に基づき詳細に説明する。 Next, the best embodiment according to the present invention will be given and described in detail with reference to the drawings.

まず、本実施形態に係るレンズシフト装置１の構成について、図１〜図９を参照して説明する。 First, the configuration of the lens shift device 1 according to the present embodiment will be described with reference to FIGS.

図９は、本実施形態に係るレンズシフト装置１を備えるプロジェクタＰ（光学機構）を示す。プロジェクタＰは、キャビネット４１の正面パネル部４１ｆから投射レンズ２が露出し、この投射レンズ２の前方に設置したスクリーンに画像を投影することができる。４２はリモコン用受信部を示す。なお、プロジェクタＰのタイプは、液晶タイプやＤＬＰタイプなど、その種類は問わない。プロジェクタＰには、投射レンズ２を水平方向（Ｘ方向）及び垂直方向（Ｙ方向）にシフトさせる本実施形態に係るレンズシフト装置１を内蔵する。このレンズシフト装置１は、操作ダイヤル４３ｘ，４３ｙにより手動操作することができ、正面パネル部４１ｆに設けた窓孔部には、垂直方向シフト用の操作ダイヤル４３ｙが露出するとともに、天面パネル部４１ｕに設けた窓孔部には、水平方向シフト用の操作ダイヤル４３ｘが露出する。 FIG. 9 shows a projector P (optical mechanism) including the lens shift device 1 according to the present embodiment. In the projector P, the projection lens 2 is exposed from the front panel portion 41 f of the cabinet 41, and an image can be projected onto a screen installed in front of the projection lens 2. Reference numeral 42 denotes a remote control receiver. The projector P may be of any type, such as a liquid crystal type or a DLP type. The projector P incorporates the lens shift device 1 according to this embodiment that shifts the projection lens 2 in the horizontal direction (X direction) and the vertical direction (Y direction). The lens shift device 1 can be manually operated by the operation dials 43x and 43y. The vertical shift operation dial 43y is exposed in the window hole provided in the front panel portion 41f, and the top panel portion. The operation dial 43x for horizontal shift is exposed in the window hole provided in 41u.

次に、レンズシフト装置１の具体的構成について、図１〜図８を参照して説明する。図１はレンズシフト装置１の平面図、図２はレンズシフト装置１の正面図をそれぞれ示す。レンズシフト装置１は、大別して、レンズ支持部３を含む支持機構部４，手動操作部５ｘ，５ｙ及び伝達機構部６ｘ，６ｙを備える。なお、上述した操作ダイヤル４３ｘは、手動により操作する手動操作部５ｘを構成するとともに、操作ダイヤル４３ｙは、手動により操作する手動操作部５ｙを構成する。 Next, a specific configuration of the lens shift device 1 will be described with reference to FIGS. FIG. 1 is a plan view of the lens shift device 1, and FIG. 2 is a front view of the lens shift device 1. The lens shift device 1 roughly includes a support mechanism unit 4 including a lens support unit 3, manual operation units 5x and 5y, and transmission mechanism units 6x and 6y. The operation dial 43x described above constitutes the manual operation unit 5x operated manually, and the operation dial 43y constitutes the manual operation unit 5y operated manually.

図６は、支持機構部４の分解斜視図を示す。レンズ支持部３は、後端にレンズ取付部５１ｃ（図７）を形成した支持筒部５１と、この支持筒部５１の前端に矩形フランジ状に形成したガイドフレーム部５２を有する。これにより、支持筒部５１に、投射レンズ２の後部を収容し、後端をレンズ取付部５１ｃにネジ止め等により取付固定することができる。図１及び図２に、投射レンズ２の一部を仮想線で示す。 FIG. 6 is an exploded perspective view of the support mechanism unit 4. The lens support portion 3 includes a support cylinder portion 51 in which a lens mounting portion 51c (FIG. 7) is formed at the rear end, and a guide frame portion 52 formed in a rectangular flange shape at the front end of the support cylinder portion 51. Thereby, the rear part of the projection lens 2 can be accommodated in the support cylinder part 51, and a rear end can be attached and fixed to the lens attaching part 51c by screwing or the like. In FIG.1 and FIG.2, some projection lenses 2 are shown with a virtual line.

また、支持機構部４は、可動フレーム部２１と固定フレーム部２５を備える。可動フレーム部２１は、ガイドフレーム部５２の前面に重ねて配する。可動フレーム部２１は、全体を矩形状に形成し、中心に投射レンズ２のシフトを許容する開口を有する。一方、固定フレーム部２５は、可動フレーム部２１の前面に重ねて配する。固定フレーム部２５は、全体を矩形状に形成し、中心に投射レンズ２のシフトを許容する開口を有する。５３はハウジングであり、このハウジング５３の前端を固定フレーム部２５に取付けることにより、このハウジング５３と固定フレーム部２５間に、レンズ支持部３のガイドフレーム部５２と可動フレーム部２１を挟み込む。この場合、可動フレーム部２１は、少なくとも固定フレーム部２５の水平方向（Ｘ方向）に対する変位（シフト）が所定範囲にわたって許容されるとともに、レンズ支持部３は、少なくとも可動フレーム部２１の垂直方向（Ｙ方向）に対する変位（シフト）が所定範囲にわたって許容されるように構成する。なお、ハウジング５３は、前述したキャビネット４１の内部に設置され、後端には、図１に仮想線で示すプリズム５４等の光学系が取付けられる。 The support mechanism unit 4 includes a movable frame unit 21 and a fixed frame unit 25. The movable frame portion 21 is disposed so as to overlap the front surface of the guide frame portion 52. The movable frame portion 21 is formed in a rectangular shape as a whole, and has an opening that allows the projection lens 2 to shift at the center. On the other hand, the fixed frame portion 25 is disposed so as to overlap the front surface of the movable frame portion 21. The fixed frame portion 25 is formed in a rectangular shape as a whole, and has an opening that allows the projection lens 2 to shift at the center. Reference numeral 53 denotes a housing. By attaching the front end of the housing 53 to the fixed frame portion 25, the guide frame portion 52 and the movable frame portion 21 of the lens support portion 3 are sandwiched between the housing 53 and the fixed frame portion 25. In this case, the movable frame portion 21 is allowed to displace (shift) at least in the horizontal direction (X direction) of the fixed frame portion 25 over a predetermined range, and the lens support portion 3 is at least the vertical direction of the movable frame portion 21 ( A displacement (shift) with respect to (Y direction) is allowed over a predetermined range. The housing 53 is installed inside the cabinet 41 described above, and an optical system such as a prism 54 indicated by a virtual line in FIG. 1 is attached to the rear end.

さらに、支持機構部４には、レンズ支持部３を垂直方向へガイドする第一ガイド機構４ｙと水平方向へガイドする第二ガイド機構４ｘを備える。この場合、第一ガイド機構４ｙは、可動フレーム部２１とレンズ支持部３間に設けるとともに、第二ガイド機構４ｘは、可動フレーム部２１と固定フレーム部２５間に設ける。 Further, the support mechanism unit 4 includes a first guide mechanism 4y for guiding the lens support unit 3 in the vertical direction and a second guide mechanism 4x for guiding in the horizontal direction. In this case, the first guide mechanism 4 y is provided between the movable frame portion 21 and the lens support portion 3, and the second guide mechanism 4 x is provided between the movable frame portion 21 and the fixed frame portion 25.

一方の第一ガイド機構４ｙは、図６及び図７に示すように、レンズ支持部３のガイドフレーム部５２における可動フレーム部２１に対向する面であって、正面から見て右端辺付近に形成した凸条部２３と、可動フレーム部２１の右端辺付近に形成し、かつ凸条部２３に係合する凹溝部２２を備える。この場合、凸条部２３の先端部２３ｓは断面Ｖ形に形成するとともに、凹溝部２２の底部２２ｄは断面Ｖ形に形成し、特に、先端部２３ｓと底部２２ｄが当接するように凸条部２３の高さ等を選定する。凸条部２３及び凹溝部２２は、それぞれ垂直方向（Ｙ方向）へ所定長さとなるように形成し、凸条部２３の長さは、凹溝部２２の長さよりも短く選定する。これにより、レンズ支持部３は、可動フレーム部２１に対して垂直方向にのみ変位が許容され、その許容される変位量は、凹溝部２２の長さと凸条部２３の長さの差となる。このような第一ガイド機構４ｙを設けることにより、別途の独立したガイド機構が不要になるため、構成の単純化による機構全体の小型化及びコストダウンを図れるという基本的なメリットに加え、断面Ｖ形の底部２２ｄと先端部２３ｓは線接触するため、凹溝部２２と凸条部２３間の隙間によるガタつきを阻止して、高精密でスムーズなシフト移動を実現できる。 As shown in FIGS. 6 and 7, one first guide mechanism 4 y is a surface facing the movable frame portion 21 in the guide frame portion 52 of the lens support portion 3 and is formed in the vicinity of the right end when viewed from the front. And a concave groove portion 22 formed near the right end side of the movable frame portion 21 and engaged with the convex strip portion 23. In this case, the tip 23s of the ridge 23 is formed in a V-shaped cross section, and the bottom 22d of the groove 22 is formed in a V-shaped cross-section, and in particular, the ridge so that the tip 23s and the bottom 22d are in contact with each other. Select a height of 23. The ridge 23 and the groove 22 are formed so as to have a predetermined length in the vertical direction (Y direction), and the length of the ridge 23 is selected to be shorter than the length of the groove 22. Accordingly, the lens support portion 3 is allowed to be displaced only in the vertical direction with respect to the movable frame portion 21, and the allowable displacement amount is a difference between the length of the groove portion 22 and the length of the ridge portion 23. . Providing such a first guide mechanism 4y eliminates the need for a separate independent guide mechanism. Therefore, in addition to the basic merit of reducing the overall mechanism size and reducing the cost by simplifying the configuration, the cross-section V Since the bottom portion 22d and the tip portion 23s of the shape are in line contact with each other, it is possible to prevent backlash due to the gap between the concave groove portion 22 and the ridge portion 23, and to realize a highly precise and smooth shift movement.

他方の第二ガイド機構４ｘは、図６及び図８に示すように、可動フレーム部２１における固定フレーム部２５に対向する面であって、上端辺付近に形成した凸条部２７と、固定フレーム部２５における上端辺付近に形成した凹溝部２６を備える。この場合、凸条部２７の先端部２７ｓは平坦面に形成するとともに、凹溝部２６の底部２６ｄも平坦面に形成する。したがって、凸条部２７と凹溝部２６の断面形状は矩形となる。凸条部２７及び凹溝部２６は、それぞれ水平方向（Ｘ方向）へ所定長さとなるように形成し、凸条部２７の長さは、凹溝部２６の長さよりも短く選定する。これにより、可動フレーム部２１（レンズ支持部３）は、固定フレーム部２５に対して水平方向にのみ変位が許容され、その許容される変位量は、凹溝部２６の長さと凸条部２７の長さの差となる。このような第二ガイド機構４ｘを設けることにより、別途の独立したガイド機構が不要になるため、構成の単純化による機構全体の小型化及びコストダウンを図れる。 As shown in FIGS. 6 and 8, the other second guide mechanism 4 x is a surface facing the fixed frame portion 25 in the movable frame portion 21, and has a ridge portion 27 formed near the upper end side, and a fixed frame. A concave groove portion 26 formed near the upper end side of the portion 25 is provided. In this case, the leading end 27s of the ridge 27 is formed on a flat surface, and the bottom 26d of the concave groove 26 is also formed on a flat surface. Therefore, the cross-sectional shape of the protruding line part 27 and the recessed groove part 26 is a rectangle. The ridge 27 and the groove 26 are formed to have a predetermined length in the horizontal direction (X direction), and the length of the ridge 27 is selected to be shorter than the length of the groove 26. As a result, the movable frame portion 21 (lens support portion 3) is allowed to be displaced only in the horizontal direction with respect to the fixed frame portion 25. The allowable displacement amount depends on the length of the concave groove portion 26 and the protrusion 27. It becomes a difference in length. Providing such a second guide mechanism 4x eliminates the need for a separate and independent guide mechanism, thereby reducing the size of the entire mechanism and reducing costs by simplifying the configuration.

なお、第二ガイド機構４ｘでは、可動フレーム部２１に対して、投射レンズ２等により下方への加重が付加されるため、凸条部２７と凹溝部２６間に隙間が存在していてもガタつきを生じることはない。このため、例示した第二ガイド機構４ｘは、凸条部２７の先端部２７ｓと凹溝部２６の底部２６ｄをそれぞれ平坦面に形成したが、第一ガイド機構４ｙと同様に、底部２６ｄ及び先端部２７ｓをそれぞれ断面Ｖ形に形成してもよい。これにより、断面Ｖ形の底部２６ｄと先端部２７ｓは線接触するため、凹溝部２６と凸条部２７間の隙間によるガタつきをより確実に阻止して、高精密でスムーズなシフト移動を実現できる。 In the second guide mechanism 4x, a downward load is applied to the movable frame portion 21 by the projection lens 2 or the like, so that even if there is a gap between the ridge portion 27 and the groove portion 26, there is a backlash. There will be no spoil. For this reason, in the illustrated second guide mechanism 4x, the tip 27s of the ridge 27 and the bottom 26d of the groove 26 are formed on flat surfaces, respectively, but the bottom 26d and the tip are similar to the first guide mechanism 4y. 27s may be formed in a V-shaped cross section. As a result, the bottom portion 26d and the tip portion 27s having a V-shaped cross section are in line contact with each other. it can.

さらに、支持機構部４と一方の操作ダイヤル４３ｘ間には、伝達機構部６ｘを配設するとともに、支持機構部４と他方の操作ダイヤル４３ｙ間には、伝達機構部６ｙを配設する。伝達機構部６ｘは、操作ダイヤル４３ｘの操作量を支持機構部４における可動フレーム部２１に伝達し、レンズ支持部３を水平方向へ変位（シフト）させる機能を備えるとともに、伝達機構部６ｙは、操作ダイヤル４３ｙの操作量を支持機構部４におけるレンズ支持部３に伝達し、レンズ支持部３を垂直方向へ変位（シフト）させる機能を備える。 Further, a transmission mechanism 6x is disposed between the support mechanism 4 and the one operation dial 43x, and a transmission mechanism 6y is disposed between the support mechanism 4 and the other operation dial 43y. The transmission mechanism unit 6x transmits the operation amount of the operation dial 43x to the movable frame unit 21 in the support mechanism unit 4 and has a function of displacing (shifting) the lens support unit 3 in the horizontal direction. An operation amount of the operation dial 43y is transmitted to the lens support unit 3 in the support mechanism unit 4 so that the lens support unit 3 is displaced (shifted) in the vertical direction.

一方の伝達機構部６ｘは、図１及び図２に示すように、スクリュ部材７ｓｘとナット部材７ｎｘが相螺合する運動変換機構７ｘを備える。この場合、ナット部材７ｎｘは、固定フレーム部２５の上端辺に当接させ、回転方向変位が規制された状態で軸方向への変位のみが許容されるように配し、一端を可動フレーム部２１の上端に係合（接続）する。また、スクリュ部材７ｓｘの両端は、固定フレーム部２５の上端辺に固定した一対の軸受部により回動自在に支持する。さらに、操作ダイヤル４３ｘの操作量をスクリュ部材７ｓｘに伝達するとともに、操作ダイヤル４３ｘの操作方向と投射レンズ２の変位方向を適合させる中間ギア機構１３ｘを配設する。中間ギア機構１３ｘは、操作ダイヤル４３ｘの軸部に設けた第一平歯車５５と、この第一平歯車５５に噛合する第二平歯車５６と、この第二平歯車５６の軸部に設けた第一斜歯歯車５７と、この第一斜歯歯車５７に噛合する第二斜歯歯車５８を備え、この第二斜歯歯車５８をスクリュ部材７ｓｘの軸部に設ける。なお、操作ダイヤル４３ｘは、正面から見て、固定フレーム部２５の上部右側の位置に軸部により回動自在に取付ける。このような中間ギア機構１３ｘを設ければ、操作ダイヤル４３ｘの操作方向と投射レンズ２の変位方向を適合させることができるため、操作時の違和感を排除できる利点がある。 As shown in FIGS. 1 and 2, one transmission mechanism 6x includes a motion conversion mechanism 7x in which a screw member 7sx and a nut member 7nx are screwed together. In this case, the nut member 7nx is brought into contact with the upper end side of the fixed frame portion 25 and arranged so that only the displacement in the axial direction is allowed in a state where the displacement in the rotational direction is restricted, and one end thereof is movable frame portion 21. Engage (connect) to the upper end of Further, both ends of the screw member 7sx are rotatably supported by a pair of bearing portions fixed to the upper end side of the fixed frame portion 25. Further, an intermediate gear mechanism 13x that transmits the operation amount of the operation dial 43x to the screw member 7sx and adapts the operation direction of the operation dial 43x and the displacement direction of the projection lens 2 is provided. The intermediate gear mechanism 13x is provided on the first spur gear 55 provided on the shaft portion of the operation dial 43x, the second spur gear 56 meshing with the first spur gear 55, and the shaft portion of the second spur gear 56. A first bevel gear 57 and a second bevel gear 58 meshing with the first bevel gear 57 are provided, and the second bevel gear 58 is provided on the shaft portion of the screw member 7sx. The operation dial 43x is pivotally attached to the position on the upper right side of the fixed frame portion 25 by a shaft portion when viewed from the front. If such an intermediate gear mechanism 13x is provided, the operation direction of the operation dial 43x and the displacement direction of the projection lens 2 can be adapted, so that there is an advantage that a sense of incongruity during operation can be eliminated.

そして、伝達機構部６ｘには、図３〜図５に示すように、スクリュ部材７ｓｘの軸方向所定位置のネジ山部７ｓｍｘの一部を切欠いた係合凹部８ｕｘ（図５参照）とこの係合凹部８ｕｘに係合する方向に弾性部材（クリックバネ）８ｄｘにより付勢された係合体（クリックボール）８ｓｘを有するクリック機構８ｘを設ける。クリック機構８ｘは、図３に示すように、係合体８ｓｘ及び弾性部材８ｄｘを、ナット部材７ｎｘの径方向に形成した収容孔１１ｘに収容し、収容孔１１ｘの外側開口を閉塞部材（閉塞ネジ）１２ｘにより閉塞して構成する。クリック機構８ｘをこのように構成すれば、クリック機構８ｘを容易かつコンパクトにできる利点がある。また、係合凹部８ｕｘは、ネジ山部７ｓｍｘの一部を切欠くことにより、深さがＤｄ（図３参照）となり、かつ係合体８ｓｘに対してクリック係合可能な大きさ及び形状を選定する。係合凹部８ｕｘを設ける位置は、スクリュ部材７ｓｘにおける軸方向所定位置を選定することができ、例示は、スクリュ部材７ｓｘのほぼ中央となるホームポジションＰｈを選定した場合を示す。 As shown in FIGS. 3 to 5, the transmission mechanism 6x includes an engagement recess 8ux (see FIG. 5) in which a part of the screw thread 7smx at a predetermined position in the axial direction of the screw member 7sx is cut out. A click mechanism 8x having an engagement body (click ball) 8sx biased by an elastic member (click spring) 8dx in a direction to engage with the mating recess 8ux is provided. As shown in FIG. 3, the click mechanism 8x accommodates the engaging body 8sx and the elastic member 8dx in the accommodation hole 11x formed in the radial direction of the nut member 7nx, and the outer opening of the accommodation hole 11x is a closing member (blocking screw). It is configured by closing with 12x. If the click mechanism 8x is configured in this manner, there is an advantage that the click mechanism 8x can be easily and compactly formed. Further, the engagement recess 8ux has a depth of Dd (see FIG. 3) by cutting out a part of the screw thread portion 7smx, and a size and shape that can be click-engaged with the engagement body 8sx are selected. To do. As the position at which the engagement recess 8ux is provided, a predetermined position in the axial direction of the screw member 7sx can be selected, and the example shows a case where the home position Ph that is substantially the center of the screw member 7sx is selected.

他方の伝達機構部６ｙも、伝達機構部６ｘにおける運動変換機構７ｘと同様の構成及び機能を有する運動変換機構７ｙを備え、ナット部材７ｎｙの一端を、レンズ支持部３の右端に係合（接続）する。したがって、伝達機構部６ｙにも、伝達機構部６ｘにおけるクリック機構８ｘと同様の構成及び機能を有するクリック機構８ｙを備えている。また、操作ダイヤル４３ｙの操作量をスクリュ部材７ｓｙに伝達するとともに、操作ダイヤル４３ｙの操作方向と投射レンズ２の変位方向を適合させる中間ギア機構１３ｙを配設する。中間ギア機構１３ｙは、操作ダイヤル４３ｙの軸部に設けた第一斜歯歯車５９と、この第一斜歯歯車５９に噛合する第二斜歯歯車６０を備え、この第二斜歯歯車６０をスクリュ部材７ｓｙの軸部に設ける。この場合、操作ダイヤル４３ｙは、正面から見て、固定フレーム部２５の右側の位置に軸部により回動自在に取付ける。このような中間ギア機構１３ｙを設ければ、前述した中間ギア機構１３ｘと同様に、操作ダイヤル４３ｙの操作方向と投射レンズ２の変位方向を適合させることができるため、操作時の違和感を排除できる利点がある。 The other transmission mechanism portion 6y also includes a motion conversion mechanism 7y having the same configuration and function as the motion conversion mechanism 7x in the transmission mechanism portion 6x, and one end of the nut member 7ny is engaged (connected) to the right end of the lens support portion 3. ) Therefore, the transmission mechanism 6y also includes a click mechanism 8y having the same configuration and function as the click mechanism 8x in the transmission mechanism 6x. In addition, an intermediate gear mechanism 13y that transmits the operation amount of the operation dial 43y to the screw member 7sy and that matches the operation direction of the operation dial 43y and the displacement direction of the projection lens 2 is provided. The intermediate gear mechanism 13y includes a first inclined gear 59 provided on the shaft portion of the operation dial 43y, and a second inclined gear 60 that meshes with the first inclined gear 59. It is provided at the shaft portion of the screw member 7sy. In this case, the operation dial 43y is rotatably attached to the right position of the fixed frame portion 25 by the shaft portion when viewed from the front. If such an intermediate gear mechanism 13y is provided, the operation direction of the operation dial 43y and the displacement direction of the projection lens 2 can be matched as in the above-described intermediate gear mechanism 13x, so that a sense of incongruity during operation can be eliminated. There are advantages.

次に、本実施形態に係るレンズシフト装置１の機能（作用）について、各図を参照して説明する。 Next, the function (action) of the lens shift device 1 according to the present embodiment will be described with reference to each drawing.

まず、ユーザが、操作ダイヤル４３ｘを回動操作すれば、この回動操作量は、第一平歯車５５，第二平歯車５６，第一斜歯歯車５７，第二斜歯歯車５８を介してスクリュ部材７ｓｘに伝達され、スクリュ部材７ｓｘは当該回動操作量に応じて回動する。これにより、ナット部材７ｎｘは軸方向に変位するとともに、可動フレーム部２１はナット部材７ｎｘの変位に追従し、第二ガイド機構４ｘに沿って水平方向（Ｘ方向）にシフトする。この際、レンズ支持部３は可動フレーム部２１に対して第一ガイド機構４ｙにより水平方向への変位が規制されるため、レンズ支持部３は可動フレーム部２１と一体に変位する。即ち、投射レンズ２は、操作ダイヤル４３ｘの操作量に対応して水平方向にシフトする。 First, if the user turns the operation dial 43x, the amount of turning operation is transmitted via the first spur gear 55, the second spur gear 56, the first inclined gear 57, and the second inclined gear 58. The screw member 7sx is transmitted to the screw member 7sx, and the screw member 7sx rotates according to the rotation operation amount. As a result, the nut member 7nx is displaced in the axial direction, and the movable frame portion 21 follows the displacement of the nut member 7nx and shifts in the horizontal direction (X direction) along the second guide mechanism 4x. At this time, the lens support portion 3 is displaced with respect to the movable frame portion 21 in the horizontal direction by the first guide mechanism 4 y, so that the lens support portion 3 is displaced integrally with the movable frame portion 21. That is, the projection lens 2 shifts in the horizontal direction corresponding to the operation amount of the operation dial 43x.

一方、ユーザが、操作ダイヤル４３ｙを回動操作すれば、この回動操作量は、第一斜歯歯車５９，第二斜歯歯車６０を介してスクリュ部材７ｓｙに伝達され、スクリュ部材７ｓｙは当該回動操作量に応じて回動する。これにより、ナット部材７ｎｙは軸方向に変位するとともに、レンズ支持部３はナット部材７ｎｙの変位に追従し、第一ガイド機構４ｙに沿って垂直方向（Ｙ方向）にシフトする。この際、可動フレーム部２１は固定フレーム部２５に対して第二ガイド機構４ｘにより垂直方向への変位が規制されるため、レンズ支持部３は可動フレーム部２１上を相対変位する。即ち、投射レンズ２は、操作ダイヤル４３ｙの操作量に対応して垂直方向にシフトする。 On the other hand, if the user rotates the operation dial 43y, the rotation operation amount is transmitted to the screw member 7sy via the first inclined gear 59 and the second inclined gear 60, and the screw member 7sy is It rotates according to the amount of rotation operation. Thus, the nut member 7ny is displaced in the axial direction, and the lens support portion 3 follows the displacement of the nut member 7ny and shifts in the vertical direction (Y direction) along the first guide mechanism 4y. At this time, since the displacement of the movable frame portion 21 in the vertical direction is restricted by the second guide mechanism 4 x with respect to the fixed frame portion 25, the lens support portion 3 is relatively displaced on the movable frame portion 21. That is, the projection lens 2 shifts in the vertical direction corresponding to the operation amount of the operation dial 43y.

この場合、第一ガイド機構４ｙでは、断面Ｖ形に形成した凹溝部２２の底部２２ｄと断面Ｖ形に形成した凸条部２３の先端部２３ｓが線接触するため、凹溝部２２と凸条部２３間の隙間によるガタつきが阻止され、高精密でスムーズなシフト移動が実現される。しかも、構成の単純化による機構全体の小型化及びコストダウンを図れるという基本的なメリットも享受できる。 In this case, in the first guide mechanism 4y, the bottom portion 22d of the groove portion 22 formed in the V-shaped section and the tip portion 23s of the protrusion portion 23 formed in the V-shaped section are in line contact with each other. The play between the gaps 23 is prevented and high-precision and smooth shift movement is realized. In addition, it is possible to enjoy the basic advantage that the overall mechanism can be reduced in size and cost can be reduced by simplifying the configuration.

ところで、伝達機構部６ｘ…には、スクリュ部材７ｓｘ…とナット部材７ｎｘ…を相螺合させた運動変換機構７ｘ…を備えるとともに、スクリュ部材７ｓｘ…の所定位置のネジ山部７ｓｍｘ…の一部を切欠いた係合凹部８ｕｘ…とこの係合凹部８ｕｘ…に係合する方向に弾性部材８ｄｘ…により付勢された係合体８ｓｘ…を有するクリック機構８ｘ…を備えるため、操作ダイヤル４３ｘ…の回動操作時に、係合凹部８ｕｘ…が係合体８ｓｘ…の位置に達すれば、係合凹部８ｕｘ…に係合体８ｓｘ…がクリック的に係止する。これにより、手動操作部５ｘ…側では、投射レンズ２のシフト位置或いはホームポジションＰｈにおける明確かつ良質のクリック感を得ることができ、投射レンズ２のシフト位置或いはホームポジションＰｈに対する容易かつ正確な位置出しを行うことができる。 By the way, the transmission mechanism section 6x is provided with a motion conversion mechanism 7x that is screwed together with a screw member 7sx and a nut member 7nx, and a part of a thread portion 7smx at a predetermined position of the screw member 7sx. Is provided with a click mechanism 8x having an engaging recess 8ux ... and an engaging body 8sx biased by an elastic member 8dx in a direction to engage with the engaging recess 8ux. When the engaging recesses 8ux... Reach the position of the engaging bodies 8sx during the movement operation, the engaging bodies 8sx. As a result, a clear and high-quality click feeling at the shift position or home position Ph of the projection lens 2 can be obtained on the manual operation section 5x..., And an easy and accurate position with respect to the shift position or home position Ph of the projection lens 2 can be obtained. Can be made.

特に、本実施形態に係るレンズシフト装置１では、このような第一ガイド機構４ｙ及び第二ガイド機構４ｘを有する支持機構部４を備えると共に、伝達機構部６ｘ…に、運動変換機構７ｘ…及びクリック機構８ｘ…を備えて構成するため、支持機構部４におけるガタつきのない高精密でスムーズなシフト移動に加え、投射レンズ２のシフト位置或いはホームポジションＰｈにおける明確かつ良質のクリック感を得れるという相乗効果により、シフト機構全体の操作フィーリング及び品質感をより高めることができる。 In particular, the lens shift device 1 according to the present embodiment includes the support mechanism unit 4 including the first guide mechanism 4y and the second guide mechanism 4x as described above, and the motion conversion mechanism 7x. Since the click mechanism 8x is configured, it is possible to obtain a clear and high-quality click feeling at the shift position or the home position Ph of the projection lens 2 in addition to the high-precision and smooth shift movement without backlash in the support mechanism section 4. Due to the synergistic effect, the operational feeling and quality of the entire shift mechanism can be further enhanced.

以上、最良の実施形態について詳細に説明したが、本発明は、このような実施形態に限定されるものではなく、細部の構成，形状，材料，数量等において、本発明の要旨を逸脱しない範囲で任意に変更，追加，削除することができる。 The best embodiment has been described in detail above, but the present invention is not limited to such an embodiment, and the scope of the present invention is not limited in the configuration, shape, material, quantity, etc. of the details. You can change, add, or delete at will.

例えば、実施形態では、投射レンズ２を水平方向及び垂直方向の双方へシフトさせる場合を示したが、いずれか一方（水平方向又は垂直方向）へのみシフトさせる場合を排除するものではない。また、クリック機構８ｘ…において、係合凹部８ｕｘ…をスクリュ部材７ｓｘ…の中央（ホームポジションＰｈ）に設けた場合を例示したが、他のシフト位置（シフト限界位置等）にも追加して設けてもよい。したがって、係合凹部８ｕｘ…は、各クリック機構８ｘ…において一又は二以上設けることができる。さらに、スクリュ部材７ｓｘ…を回転させてナット部材７ｎｘ…を軸方向変位させる運動変換機構７ｘ…を例示したが、ナット部材７ｎｘ…を回転させてスクリュ部材７ｓｘ…を軸方向変位させてもよい。一方、凹溝部２２を可動フレーム部２１に設け、凸条部２３をレンズ支持部３に設けた場合を例示したが、凹溝部２２をレンズ支持部３に設け、凸条部２３を可動フレーム部２１に設けてもよい。なお、この点は、可動フレーム部２１と固定フレーム部２５間における凹溝部２６と凸条部２７においても同様である。他方、支持機構部４、ガイド機構４ｘ，４ｙ、手動操作部５ｘ，５ｙ、伝達機構部６ｘ，６ｙの各構成は、必要により同様の機能を発揮する他の構成により置換できる。また、光学機構としてプロジェクタＰを例示したが、プロジェクタＰは業務用であってもよいし家庭用であってもよく、各種用途のプロジェクタに適用できるとともに、映写機，スライド投射機，ＯＨＰ等の各種光学機構に適用できる。 For example, in the embodiment, the case where the projection lens 2 is shifted in both the horizontal direction and the vertical direction has been described. However, the case where the projection lens 2 is shifted only in one direction (the horizontal direction or the vertical direction) is not excluded. Also, in the click mechanism 8x, the case where the engaging recess 8ux is provided at the center (home position Ph) of the screw member 7sx is illustrated, but it is additionally provided at other shift positions (shift limit position, etc.). May be. Therefore, one or more engagement recesses 8ux can be provided in each click mechanism 8x. Furthermore, although the motion conversion mechanism 7x ... which rotates the screw members 7sx ... and axially displaces the nut members 7nx ... is illustrated, the screw members 7sx ... may be axially displaced by rotating the nut members 7nx .... On the other hand, the case where the concave groove portion 22 is provided in the movable frame portion 21 and the convex stripe portion 23 is provided in the lens support portion 3 is illustrated, but the concave groove portion 22 is provided in the lens support portion 3 and the convex stripe portion 23 is provided as the movable frame portion. 21 may be provided. This also applies to the groove 26 and the ridge 27 between the movable frame 21 and the fixed frame 25. On the other hand, the configurations of the support mechanism unit 4, the guide mechanisms 4x and 4y, the manual operation units 5x and 5y, and the transmission mechanism units 6x and 6y can be replaced with other configurations that exhibit similar functions as necessary. Further, although the projector P is exemplified as the optical mechanism, the projector P may be for business use or home use, and can be applied to projectors for various uses, and various projectors, slide projectors, OHP, and the like. Applicable to optical mechanism.

本発明の最良の実施形態に係るレンズシフト装置の平面図、The top view of the lens shift device concerning the best embodiment of the present invention, 同レンズシフト装置の正面図、Front view of the lens shift device, 同レンズシフト装置における運動変換機構及びクリック機構の一部抽出拡大図を含む断面正面図、Sectional front view including a partially extracted enlarged view of the motion conversion mechanism and click mechanism in the lens shift device, 同レンズシフト装置における運動変換機構及びクリック機構の一部を分解して示す外観斜視図、An exploded perspective view showing a part of the motion conversion mechanism and the click mechanism in the lens shift device, 同レンズシフト装置における運動変換機構及びクリック機構に用いるスクリュ部材の斜視図、A perspective view of a screw member used for a motion conversion mechanism and a click mechanism in the lens shift device, 同レンズシフト装置におけるレンズ支持部を含む細部を省略した支持機構部の分解斜視図、The exploded perspective view of the support mechanism part which omitted details including the lens support part in the lens shift device, 同レンズシフト装置における第一ガイド機構の一部抽出拡大図を含む支持機構部の一部断面底面図、A partial cross-sectional bottom view of the support mechanism including a partially extracted enlarged view of the first guide mechanism in the lens shift device; 同レンズシフト装置における第二ガイド機構の一部抽出拡大図を含む支持機構部の一部断面側面図、A partial cross-sectional side view of the support mechanism including a partially extracted enlarged view of the second guide mechanism in the lens shift device; 同レンズシフト装置を備えるプロジェクタの外観斜視図、External perspective view of a projector equipped with the lens shift device,

符号の説明Explanation of symbols

１レンズシフト装置
２投射レンズ
３レンズ支持部
４支持機構部
４ｘ第二ガイド機構
４ｙ第一ガイド機構
５ｘ手動操作部
５ｙ手動操作部
６ｘ伝達機構部
６ｙ伝達機構部
７ｘ運動変換機構
７ｙ運動変換機構
７ｓｘスクリュ部材
７ｓｙスクリュ部材
７ｎｘナット部材
７ｎｙナット部材
７ｓｍｘ… ネジ山部
８ｘクリック機構
８ｙクリック機構
８ｕｘ… 係合凹部
８ｄｘ… 弾性部材
８ｓｘ… 係合体
１１ｘ… 収容孔
１２ｘ… 閉塞部材
１３ｘ中間ギア機構
１３ｙ中間ギア機構
２１可動フレーム部
２２凹溝部
２２ｄ凹溝部の底部
２３凸条部
２３ｓ凸条部の先端部
２５固定フレーム部
２６凹溝部
２６ｄ凹溝部の底部
２７凸条部
２７ｓ凸条部の先端部
Ｐプロジェクタ（光学機構） DESCRIPTION OF SYMBOLS 1 Lens shift apparatus 2 Projection lens 3 Lens support part 4 Support mechanism part 4x 2nd guide mechanism 4y 1st guide mechanism 5x Manual operation part 5y Manual operation part 6x Transmission mechanism part 6y Transmission mechanism part 7x Motion conversion mechanism 7y Motion conversion mechanism 7sx Screw member 7sy Screw member 7nx Nut member 7ny Nut member 7smx ... Threaded portion 8x Click mechanism 8y Click mechanism 8ux ... Engaging recess 8dx ... Elastic member 8sx ... Engaging body 11x ... Housing hole 12x ... Closing member 13x Intermediate gear mechanism 13y Mechanism 21 Movable frame part 22 Concave groove part 22d Concave groove part bottom 23 Convex part 23s Convex part tip part 25 Fixed frame part 26 Concave groove part 26d Concave part bottom part 27 Convex part 27s Convex part tip part P Projector ( Optical mechanism)

Claims

投射レンズを支持するレンズ支持部を水平方向及び／又は垂直方向へガイドするガイド機構を有する支持機構部と、手動により操作する手動操作部と、この手動操作部の操作量を前記支持機構部に伝達して前記レンズ支持部を水平方向及び／又は垂直方向へシフトさせる伝達機構部を備える光学機構のレンズシフト装置において、前記伝達機構部に、相螺合するスクリュ部材とナット部材の一方を回転させることにより他方を軸方向へ変位させる運動変換機構を設けるとともに、前記スクリュ部材の軸方向所定位置のネジ山部の一部を切欠いた係合凹部とこの係合凹部に係合する方向に弾性部材により付勢された係合体を有するクリック機構を設けたことを特徴とする光学機構のレンズシフト装置。 A support mechanism unit having a guide mechanism for guiding a lens support unit for supporting the projection lens in the horizontal direction and / or the vertical direction, a manual operation unit operated manually, and an operation amount of the manual operation unit to the support mechanism unit In a lens shift device of an optical mechanism that includes a transmission mechanism that transmits and shifts the lens support portion in a horizontal direction and / or a vertical direction, one of a screw member and a nut member that are engaged with the transmission mechanism portion is rotated. By providing a motion conversion mechanism that displaces the other in the axial direction, the screw member at the predetermined position in the axial direction of the screw member is notched and an engagement recess is elastic in a direction to engage with the engagement recess. A lens shift device for an optical mechanism, comprising a click mechanism having an engagement body biased by a member.

前記クリック機構は、前記係合体及び前記弾性部材を、前記ナット部材の径方向に形成した収容孔に収容し、前記収容孔の外側開口を閉塞部材で閉塞して構成することを特徴とする請求項１記載の光学機構のレンズシフト装置。 The click mechanism is configured to house the engaging body and the elastic member in a housing hole formed in a radial direction of the nut member, and close an outer opening of the housing hole with a closing member. Item 4. A lens shift device for an optical mechanism according to Item 1.

前記伝達機構部は、前記手動操作部の操作量を前記スクリュ部材に伝達するとともに、前記手動操作部の操作方向と前記投射レンズの変位方向を適合させる中間ギア機構を備えることを特徴とする請求項１記載の光学機構のレンズシフト装置。 The transmission mechanism unit includes an intermediate gear mechanism that transmits an operation amount of the manual operation unit to the screw member and adapts an operation direction of the manual operation unit and a displacement direction of the projection lens. Item 4. A lens shift device for an optical mechanism according to Item 1.

投射レンズを支持するレンズ支持部を水平方向及び／又は垂直方向へガイドするガイド機構を有する支持機構部と、手動により操作する手動操作部と、この手動操作部の操作量を前記支持機構部に伝達して前記レンズ支持部を水平方向及び／又は垂直方向へシフトさせる伝達機構部を備える光学機構のレンズシフト装置において、前記支持機構部に、少なくとも前記レンズ支持部の前面に配した可動フレーム部を設けるとともに、前記レンズ支持部と前記可動フレーム部の一方に、底部が断面Ｖ形となる所定長さの凹溝部を形成し、かつ他方に、先端部が断面Ｖ形となり、前記凹溝部に係合する所定長さの凸条部を形成することにより、前記レンズ支持部を垂直方向（又は水平方向）にのみ変位を許容する第一ガイド機構を設けたことを特徴とする光学機構のレンズシフト装置。 A support mechanism unit having a guide mechanism for guiding a lens support unit for supporting the projection lens in the horizontal direction and / or the vertical direction, a manual operation unit operated manually, and an operation amount of the manual operation unit to the support mechanism unit In the lens shift device of an optical mechanism that includes a transmission mechanism that transmits and shifts the lens support in the horizontal direction and / or vertical direction, the movable frame disposed at least in front of the lens support in the support mechanism A concave groove portion having a predetermined length with a bottom portion having a V-shaped cross section is formed on one of the lens support portion and the movable frame portion, and a distal end portion has a V-shaped cross section on the other side. A first guide mechanism that allows displacement of the lens support portion only in a vertical direction (or a horizontal direction) by forming a projecting ridge portion having a predetermined length to be engaged is provided. Lens shift device of the optical mechanism.

前記支持機構部に、前記可動フレーム部の前面に配した固定フレーム部を設けるとともに、前記可動フレーム部と前記固定フレーム部の一方に所定長さの凹溝部を形成し、かつ他方に前記凹溝部に係合する所定長さの凸条部を形成することにより、前記可動フレーム部を水平方向（又は垂直方向）にのみ変位を許容する第二ガイド機構を設けたことを特徴とする請求項４記載の光学機構のレンズシフト装置。 The support mechanism portion is provided with a fixed frame portion disposed on the front surface of the movable frame portion, and a concave groove portion having a predetermined length is formed in one of the movable frame portion and the fixed frame portion, and the concave groove portion is formed in the other. 5. A second guide mechanism is provided which allows a displacement of the movable frame portion only in a horizontal direction (or a vertical direction) by forming a convex strip portion having a predetermined length to be engaged with the movable frame portion. A lens shift device of the optical mechanism described.

前記第二ガイド機構は、前記可動フレーム部と前記固定フレーム部の一方に、底部が断面Ｖ形となる所定長さの凹溝部を形成し、かつ他方に、先端部が断面Ｖ形となり、前記凹溝部に係合する所定長さの凸条部を形成することを特徴とする請求項５記載の光学機構のレンズシフト装置。 The second guide mechanism has a groove having a predetermined length with a bottom having a V-shaped cross section at one of the movable frame portion and the fixed frame portion, and the tip has a V-shaped cross section at the other end. 6. The lens shift device for an optical mechanism according to claim 5, wherein a convex strip having a predetermined length that engages with the concave groove is formed.

前記伝達機構部に、相螺合するスクリュ部材とナット部材の一方を回転させることにより他方を軸方向へ変位させる運動変換機構を設けるとともに、前記スクリュ部材の軸方向所定位置のネジ山部の一部を切欠いた係合凹部とこの係合凹部に係合する方向に弾性部材により付勢された係合体を有するクリック機構を設けたことを特徴とする請求項４記載の光学機構のレンズシフト装置。 The transmission mechanism is provided with a motion conversion mechanism that rotates one of the screw member and the nut member that are engaged with each other to displace the other in the axial direction, and one screw thread portion at a predetermined axial position of the screw member. 5. A lens shift device for an optical mechanism according to claim 4, further comprising: a click mechanism having an engaging recess with a cut-out portion and an engaging member biased by an elastic member in a direction to engage with the engaging recess. .