JP2014123156A - Imaging device - Google Patents
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- JP2014123156A JP2014123156A JP2014068636A JP2014068636A JP2014123156A JP 2014123156 A JP2014123156 A JP 2014123156A JP 2014068636 A JP2014068636 A JP 2014068636A JP 2014068636 A JP2014068636 A JP 2014068636A JP 2014123156 A JP2014123156 A JP 2014123156A
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Abstract
Description
本発明は、例えばデジタルカメラなどの撮像装置に関し、特にレンズ鏡筒周りを回転する操作リングを有する撮像装置に関する。 The present invention relates to an imaging apparatus such as a digital camera, and more particularly to an imaging apparatus having an operation ring that rotates around a lens barrel.
従来、ビデオカメラの操作リングを操作することにより、フォーカスを調整する機構が提案されている（特許文献１）。 Conventionally, a mechanism for adjusting the focus by operating an operation ring of a video camera has been proposed (Patent Document 1).
この提案では、レンズ鏡筒の外周部に操作リングが回転可能に配置され、操作リングの一端には、円周方向に複数の切欠きを有するパタンリングが操作リングと一体回転可能に取り付けられている。 In this proposal, an operation ring is rotatably arranged on the outer periphery of the lens barrel, and a pattern ring having a plurality of notches in the circumferential direction is attached to one end of the operation ring so as to be rotatable together with the operation ring. Yes.
そして、操作リングの回転操作時に、レンズ鏡筒側に取り付けられたフォトインタラプタでパタンリングの切欠きを検出することで、操作リングの回転方向及び回転角度を識別してレンズ鏡筒を駆動するモータの駆動方向及び駆動量を決定するようにしている。 A motor that drives the lens barrel by identifying the rotation direction and the rotation angle of the operation ring by detecting the notch of the pattern ring with a photo interrupter attached to the lens barrel side during the rotation operation of the operation ring. The driving direction and the driving amount are determined.
しかし、上記特許文献１では、操作リングの回転方向及び回転角度を検出するためのパタンリングが操作リングに光軸方向に一体に設けられているので、撮像装置の光軸方向の寸法が増し、薄型化を妨げる原因になる。 However, in Patent Document 1, since the pattern ring for detecting the rotation direction and the rotation angle of the operation ring is provided integrally with the operation ring in the optical axis direction, the size in the optical axis direction of the imaging device increases. It becomes the cause which prevents thinning.
そこで、本発明は、操作リングを備える撮像装置の光軸方向の長さを短くして薄型化を達成することを目的とする。 Accordingly, an object of the present invention is to achieve a reduction in thickness by shortening the length in the optical axis direction of an imaging apparatus including an operation ring.
上記目的を達成するために、本発明の撮像装置は、レンズ鏡筒に外挿され、回転操作が可能な回転操作部材と、前記回転操作部材の回転方向と回転量を検出する検出手段と、前記回転操作部材が回転操作されたときに、クリック感を発生させるクリック機構と、を備え、前記回転操作部材には、複数の開口部が周方向に等間隔で形成されており、前記クリック機構は、前記複数の開口部の何れかに係合可能なボール部材と、前記ボール部材を前記回転操作部材に向けて付勢する付勢部材と、を有し、前記検出手段および前記クリック機構は、前記レンズ鏡筒の光軸方向にて、互いに重なり合わないように配置されており、前記検出手段は、前記ボール部材から前記回転操作部材の周方向の９０°以内の領域に配置されることを特徴とする。 In order to achieve the above object, an imaging apparatus of the present invention includes a rotation operation member that is extrapolated to a lens barrel and capable of rotation operation, and a detection unit that detects a rotation direction and a rotation amount of the rotation operation member, A click mechanism that generates a click feeling when the rotation operation member is rotated, and the rotation operation member has a plurality of openings formed at equal intervals in the circumferential direction. Includes a ball member that can be engaged with any of the plurality of openings, and a biasing member that biases the ball member toward the rotation operation member, and the detection unit and the click mechanism include In the optical axis direction of the lens barrel, they are arranged so as not to overlap each other, and the detection means is arranged in a region within 90 ° from the ball member in the circumferential direction of the rotation operation member. It is characterized by.
本発明によれば、レンズ鏡筒に回転操作が可能な回転操作部材を設けたとしても、撮像装置の光軸方向の長さを短くして薄型化を達成することができる。 According to the present invention, even if a rotation operation member capable of rotation operation is provided on the lens barrel, it is possible to reduce the length of the imaging device in the optical axis direction and achieve a reduction in thickness.
以下、本発明の実施形態の一例を図面を参照して説明する。 Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.
図１は本発明の撮像装置の実施形態の一例であるデジタルカメラを正面側から見た斜視図、図２は図１に示すデジタルカメラを背面側から見た斜視図である。 FIG. 1 is a perspective view of a digital camera as an example of an embodiment of an imaging apparatus according to the present invention as seen from the front side, and FIG. 2 is a perspective view of the digital camera shown in FIG.
図１及び図２において、本実施形態のデジタルカメラ１は、装置本体１Ａの正面側に、操作リング２、レンズ鏡筒３及び補助光窓９が配置され、背面側に、液晶表示部１１及び十字キー１２等が配置される。また、装置本体１Ａの上面には、モードダイアル５、レリーズボタン６、切り替えボタン７、パワーボタン８、ポップアップストロボ１０、ズームダイアル１３が配置される。 1 and 2, in the digital camera 1 of the present embodiment, an operation ring 2, a lens barrel 3 and an auxiliary light window 9 are arranged on the front side of the apparatus main body 1A, and a liquid crystal display unit 11 and A cross key 12 or the like is arranged. A mode dial 5, a release button 6, a switching button 7, a power button 8, a pop-up strobe 10, and a zoom dial 13 are disposed on the upper surface of the apparatus main body 1A.
パワーボタン８を押下してデジタルカメラ１を起動すると、レンズ鏡筒３がワイド位置まで繰り出される。次に、モードダイアル５を操作して、例えばＴｖ：シャッタスピード優先ＡＥモードに合わせる。 When the digital camera 1 is activated by pressing the power button 8, the lens barrel 3 is extended to the wide position. Next, the mode dial 5 is operated to adjust, for example, Tv: shutter speed priority AE mode.
このとき、シャッタスピードの設定値が１／６０であったとする。この状態で、レンズ鏡筒３に回転可能に外挿される操作リング２を後述するクリック機構４１を介して装置本体１Ａの背面側から見て時計回り方向に１クリック回転させると、シャッタスピードは、あらかじめ設定されている隣の値、例えば１／５０に設定される。逆に、操作リング２を装置本体１Ａの背面側から見て反時計回り方向に１クリック回転させると、シャッタスピードは、逆側の隣の値、例えば１／８０に設定される。 At this time, it is assumed that the set value of the shutter speed is 1/60. In this state, when the operation ring 2 rotatably attached to the lens barrel 3 is rotated by one click in the clockwise direction when viewed from the back side of the apparatus main body 1A via a click mechanism 41 described later, the shutter speed is The adjacent value set in advance, for example, 1/50 is set. Conversely, when the operation ring 2 is rotated by one click in the counterclockwise direction when viewed from the back side of the apparatus main body 1A, the shutter speed is set to a value adjacent to the opposite side, for example, 1/80.
操作リング２の回転量に応じてシャッタスピードの設定値は変更され、操作リング２を装置本体１Ａの背面側から見て時計回り方向に３クリック回転させたときは、シャッタスピードは、１／５０、１／４０、１／３０と遷移して１／３０に設定される。なお、シャッタスピードの設定値は、撮影時のスルー画像と合わせて液晶表示部１１により確認することができる。なお、操作リング２にクリック感を発生させるクリック機構４１及び操作リング２の回転方向と回転量の検出方法についての詳細は後述する。 The set value of the shutter speed is changed according to the rotation amount of the operation ring 2, and when the operation ring 2 is rotated three clicks clockwise when viewed from the back side of the apparatus main body 1A, the shutter speed is 1/50. , 1/40, 1/30, and 1/30. The set value of the shutter speed can be confirmed by the liquid crystal display unit 11 together with the through image at the time of shooting. The details of the click mechanism 41 that generates a click feeling in the operation ring 2 and the detection method of the rotation direction and the rotation amount of the operation ring 2 will be described later.
また、モードがＴｖ：シャッタスピード優先ＡＥモードのときでも、切り替えボタン７により、様々なパラメータを操作リング２を回転操作して変更することができる。例えば、切り替えボタン７を一度押すと、設定パラメータがシャッタスピードからＩＳＯ感度に変更される。 Further, even when the mode is Tv: shutter speed priority AE mode, various parameters can be changed by rotating the operation ring 2 by the switching button 7. For example, when the switching button 7 is pressed once, the setting parameter is changed from the shutter speed to the ISO sensitivity.
このとき、操作リング２を装置本体１Ａの背面側から見て時計回り方向に３クリック回転させると、ＩＳＯ感度の設定値は、初期値を４００とした場合、５００、６４０、８００と遷移し、ＩＳＯ感度が８００に設定される。逆に、操作リング２を装置本体１Ａの背面側から見て反時計回り方向に３クリック回転させると、ＩＳＯ感度の設定値は、初期値を４００とした場合、３２０、２５０、２００と遷移する。 At this time, when the operation ring 2 is rotated by three clicks in the clockwise direction when viewed from the back side of the apparatus main body 1A, the ISO sensitivity setting value transitions to 500, 640, 800 when the initial value is 400, The ISO sensitivity is set to 800. Conversely, when the operation ring 2 is rotated three clicks counterclockwise when viewed from the back side of the apparatus main body 1A, the ISO sensitivity setting value transitions to 320, 250, and 200 when the initial value is 400. .
なお、設定できるパラメータは、シャッタスピード、ＩＳＯ感度の他に露出値、絞り値、ホワイトバランス、レンズ鏡筒３のズームポジション、マニュアルフォーカスモード時のピント位置などを例示することができる。 The parameters that can be set include, for example, the exposure value, aperture value, white balance, zoom position of the lens barrel 3, focus position in the manual focus mode, in addition to the shutter speed and ISO sensitivity.
また、シャッタスピード優先ＡＥモード以外のモードのときも、設定できるパラメータが変わるだけで、操作リング２の操作で上記とほぼ同様の設定をすることができる。モードをマニュアルモードにし、操作リング２でシャッタスピード変更、十字キー１２で絞り値変更といった操作も可能である。再生モード時においては、操作リング２の回転操作で画像の送りや拡大・縮小などを行うことも可能である。 Also, in modes other than the shutter speed priority AE mode, the same setting as described above can be performed by operating the operation ring 2 only by changing the parameters that can be set. It is also possible to change the mode to the manual mode, change the shutter speed with the operation ring 2, and change the aperture value with the cross key 12. In the reproduction mode, it is also possible to perform image forwarding, enlargement / reduction, and the like by rotating the operation ring 2.
次に、図３及び図４を用いて、操作リング２が組み付けられる前面カバーユニットの構成例について説明する。図３は前面カバーユニットの背面図、図４は前面カバーユニットの分解斜視図である。 Next, a configuration example of the front cover unit to which the operation ring 2 is assembled will be described with reference to FIGS. 3 and 4. 3 is a rear view of the front cover unit, and FIG. 4 is an exploded perspective view of the front cover unit.
図３及び図４に示すように、前面カバーユニットは、操作リング２、前面カバー４、補助光窓９、樹脂ベース２１、環状部材２２、クリック機構４１、検出手段４２を備える。 As shown in FIGS. 3 and 4, the front cover unit includes an operation ring 2, a front cover 4, an auxiliary light window 9, a resin base 21, an annular member 22, a click mechanism 41, and detection means 42.
本発明のベース部材の一例である樹脂ベース２１には、クリック機構４１及び検出手段４２の保持部材２５，２７や補助光窓９が位置決め固定され、また、操作リング２及び環状部材２２が回転可能に取り付けられる。なお、本実施形態では、前面カバー４を金属製としているため前面カバー４と樹脂ベース２１とを別体としているが、前面カバー４を樹脂製とした場合は、前面カバー４と樹脂ベース２１とを樹脂の一体成形品とすることができる。 On the resin base 21 which is an example of the base member of the present invention, the holding members 25 and 27 of the click mechanism 41 and the detection means 42 and the auxiliary light window 9 are positioned and fixed, and the operation ring 2 and the annular member 22 are rotatable. Attached to. In this embodiment, since the front cover 4 is made of metal, the front cover 4 and the resin base 21 are separated. However, when the front cover 4 is made of resin, the front cover 4 and the resin base 21 Can be formed as an integral molded product of resin.
クリック機構４１は、本発明のボール部材の一例としての鋼球２３、付勢部材としてのばね２４、保持部材２５及び導電性部材２６を備え、環状部材２２を間に挟んでビス２９ａ等により樹脂ベース２１に締結される。導電性部材２６により、操作リング２は、環状部材２２、鋼球２３、ばね２４を介して不図示のグランド電位を持つ部材と電気的に導通される。なお、本実施形態では、操作リング２を金属製としているため導電性部材２６を備える構成としているが、操作リング２が樹脂などの非導電性部材であれば、導電性部材２６を省略することができる。 The click mechanism 41 includes a steel ball 23 as an example of a ball member of the present invention, a spring 24 as an urging member, a holding member 25 and a conductive member 26, and a resin with screws 29a and the like with the annular member 22 interposed therebetween. Fastened to the base 21. The operation ring 2 is electrically connected to a member having a ground potential (not shown) through the annular member 22, the steel ball 23, and the spring 24 by the conductive member 26. In this embodiment, since the operation ring 2 is made of metal, the conductive member 26 is provided. However, if the operation ring 2 is a non-conductive member such as resin, the conductive member 26 is omitted. Can do.
検出手段４２は、保持部材２７及び検出用フレキ２８を備え、環状部材２２を間に挟んでビス２９ｂ等により樹脂ベース２１に締結される。検出用フレキ２８には、２つのフォトリフレクタ３１ａ，３１ｂ（図６参照）が実装されている。検出用フレキ２８は、不図示の本体側コネクタに接続されるが、組み立て易いように、図のように長尺に形成している。 The detecting means 42 includes a holding member 27 and a detecting flexible 28, and is fastened to the resin base 21 with screws 29 b or the like with the annular member 22 interposed therebetween. Two photo reflectors 31a and 31b (see FIG. 6) are mounted on the detection flex 28. The detection flex 28 is connected to a main body side connector (not shown), but is formed in a long shape as shown in the figure for easy assembly.
ここで、クリック機構４１は、図３に示すように、レンズ鏡筒３と装置本体１Ａの底面との間に形成される略三角形のスペース５１ａに配置される。また、検出手段４２についても、スペース５１ａと対称位置でレンズ鏡筒３と装置本体１Ａの底面との間に形成される略三角形のスペース５１ｂに配置される。 Here, the click mechanism 41 is disposed in a substantially triangular space 51a formed between the lens barrel 3 and the bottom surface of the apparatus main body 1A, as shown in FIG. The detection means 42 is also disposed in a substantially triangular space 51b formed between the lens barrel 3 and the bottom surface of the apparatus main body 1A at a position symmetrical to the space 51a.
このように、レンズ鏡筒３と装置本体１Ａの底面との間に形成される空きスペースを有効に利用することにより、デジタルカメラ１を光軸方向に大型化させることなくクリック機構４１と検出手段４２を配置することができる。なお、本実施形態では、クリック機構４１と検出手段４２を別々のスペースに配置しているが、両方を一つのスペースに配置してもよい。 In this way, by effectively utilizing the empty space formed between the lens barrel 3 and the bottom surface of the apparatus main body 1A, the click mechanism 41 and the detection means can be obtained without increasing the size of the digital camera 1 in the optical axis direction. 42 can be arranged. In the present embodiment, the click mechanism 41 and the detection means 42 are arranged in separate spaces, but both may be arranged in one space.
樹脂ベース２１は、両面テープもしくは接着剤等の固定手段により前面カバー４に固定される。操作リング２は、前面カバー４及び樹脂ベース２１を間に挟んだ状態で、環状部材２２に係合することにより、光軸方向の抜け止めがなされ、かかる係合状態では、操作リング２は、環状部材２２と一体に回転可能に前面カバー４に取り付けられる。 The resin base 21 is fixed to the front cover 4 by fixing means such as double-sided tape or adhesive. The operation ring 2 is prevented from coming off in the optical axis direction by engaging with the annular member 22 with the front cover 4 and the resin base 21 sandwiched therebetween. Attached to the front cover 4 so as to be rotatable integrally with the annular member 22.
ここで、本実施形態では、装置本体１Ａの小型化を図るため、操作リング２の周方向に互いに１２０°離間して形成された３箇所の凸部２ａを該凸部２ａに対応して環状部材２２に形成された３箇所の穴２２ａに係合するようにしている。ただし、必ずしもこのようにする必要はなく、操作リング２を環状部材２２にビス等により固定してもよい。 Here, in the present embodiment, in order to reduce the size of the apparatus main body 1A, three convex portions 2a formed at 120 ° apart from each other in the circumferential direction of the operation ring 2 are annularly formed corresponding to the convex portions 2a. It engages with three holes 22 a formed in the member 22. However, this is not always necessary, and the operation ring 2 may be fixed to the annular member 22 with screws or the like.
次に、クリック機構４１、及び操作リング２の回転方向と回転量を検出する方法について説明する。 Next, a method for detecting the rotation direction and the rotation amount of the click mechanism 41 and the operation ring 2 will be described.
図５は、環状部材２２の周方向の一部を拡大した図である。 FIG. 5 is an enlarged view of a part of the annular member 22 in the circumferential direction.
図５に示すように、操作リング２と一体に回転する環状部材２２には、デジタルカメラ１の光軸方向と直交する面上に、開口部２２ｂが周方向に等間隔で複数形成されている（図では周方向に１０°間隔で３６箇所形成されている）。 As shown in FIG. 5, the annular member 22 that rotates integrally with the operation ring 2 has a plurality of openings 22 b formed at equal intervals in the circumferential direction on a surface orthogonal to the optical axis direction of the digital camera 1. (In the figure, 36 places are formed at intervals of 10 ° in the circumferential direction).
開口部２２ｂは、環状部材２２の外周側に位置し周方向の寸法が長い幅広部２２ｙと、幅広部２２ｙの径方向内側に配置されて、幅広部２２ｙより周方向の長さが短い幅狭部２２ｘとを有する。開口部２２ｂのうち、幅狭部２２ｘがクリック機構４１に利用され、幅広部２２ｙが操作リング２の回転方向及び回転量の検出に利用される。 The opening 22b is located on the outer peripheral side of the annular member 22 and has a wide circumferential portion 22y having a long circumferential dimension and a radially inner side of the wide portion 22y. The opening 22b has a narrower circumferential length than the wide portion 22y. Part 22x. Of the opening 22b, the narrow portion 22x is used for the click mechanism 41, and the wide portion 22y is used for detecting the rotation direction and the rotation amount of the operation ring 2.
複数の開口部２２ｂの幅狭部２２ｘのうち、一つの幅狭部２２ｘには、鋼球２３がばね２４により環状部材２２側に付勢された状態で配置される。このとき、鋼球２３は、その中心が幅狭部２２ｘの周方向中央に位置するように配置される。 Among the narrow portions 22x of the plurality of openings 22b, the steel balls 23 are disposed in one narrow portion 22x in a state of being biased toward the annular member 22 by the spring 24. At this time, the steel ball 23 is disposed so that the center thereof is located at the center in the circumferential direction of the narrow portion 22x.
そして、操作リング２が回転操作されると、環状部材２２が操作リング２と一体的に回転し、開口部２２ｂに係合可能な鋼球２３が環状部材２２の幅狭部２２ｘに係合したり、環状部材２２の各開口部２２ｂ間の面上を摺動したりすることで、クリック感が発生する。なお、開口部２２ｂの幅狭部２２ｘの周方向の幅寸法Ｘを鋼球２３の直径に合わせて調整したり、ばね２４の付勢力を調整したりすることにより、所望のクリック力を得ることができる。 When the operation ring 2 is rotated, the annular member 22 rotates integrally with the operation ring 2, and the steel ball 23 that can be engaged with the opening 22b is engaged with the narrow portion 22x of the annular member 22. Or by sliding on the surface between the openings 22b of the annular member 22, a click feeling is generated. In addition, a desired click force can be obtained by adjusting the circumferential width dimension X of the narrow portion 22x of the opening 22b according to the diameter of the steel ball 23 or adjusting the biasing force of the spring 24. Can do.
操作リング２の回転方向及び回転量の検出には、開口部２２ｂを光学的に検出する検出手段４２の検出用フレキ２８に実装された２つのフォトリフレクタ３１ａ，３１ｂを用いる。 For detection of the rotation direction and amount of rotation of the operation ring 2, two photo reflectors 31a and 31b mounted on the detection flex 28 of the detection means 42 for optically detecting the opening 22b are used.
フォトリフレクタ３１ａ，３１ｂは、環状部材２２の開口部２２ｂの幅広部２２ｙの径方向の中心を通るピッチ円上で、クリック動作の停止時、幅広部２２ｙの周方向の角度５°の１／４（５／４°）の位置に光線反射位置が一致するように配置される。図５では、２つのフォトリフレクタ３１ａ，３１ｂの光線反射位置は、互いに周方向に５５／４°離間して配置されている。 The photo reflectors 31a and 31b are on a pitch circle passing through the radial center of the wide portion 22y of the opening 22b of the annular member 22, and when the click operation is stopped, 1/4 of the circumferential angle of the wide portion 22y is 5 °. It is arranged so that the light reflection position coincides with the position of (5/4 °). In FIG. 5, the light reflection positions of the two photo reflectors 31 a and 31 b are spaced from each other by 55/4 ° in the circumferential direction.
ここで、フォトリフレクタ３１ａ，３１ｂの光線反射位置とは、図６に示すように、フォトリフレクタ３１ａ，３１ｂの発光部から射出された光線が環状部材２２のデジタルカメラ１の光軸方向と直交する面に当たる位置である。クリック動作の停止時には、２つのフォトリフレクタ３１ａ，３１ｂの発光部から射出された光線は、いずれも環状部材２２の面には当たらずに反射しないため、出力信号はともにＬｏｗとなる。２つのフォトリフレクタ３１ａ，３１ｂの発光部から射出された環状部材２２の面で反射して受光部で受光すれば、出力信号はＨｉｇｈとなる。 Here, the light beam reflection positions of the photo reflectors 31a and 31b are, as shown in FIG. The position that hits the surface. When the click operation is stopped, the light beams emitted from the light emitting portions of the two photo reflectors 31a and 31b do not hit the surface of the annular member 22 and are not reflected, so both output signals are Low. When the light is reflected by the surface of the annular member 22 emitted from the light emitting portions of the two photo reflectors 31a and 31b and received by the light receiving portion, the output signal becomes High.
図７は、２つのフォトリフレクタ３１ａ，３１ｂの出力信号のタイミングチャート図である。図中のＬはＬｏｗ、ＨはＨｉｇｈを表している。 FIG. 7 is a timing chart of output signals from the two photo reflectors 31a and 31b. In the figure, L represents Low and H represents High.
上述したように、クリック動作停止時の２つのフォトリフレクタ３１ａ，３１ｂの出力はともにＬｏｗであり、クリックポジションは、２つのフォトリフレクタ３１ａ，３１ｂの出力がともにＬｏｗとなる区間の中央としている。これは、クリック動作停止時の２つのフォトリフレクタ３１ａ，３１ｂの出力信号を安定させるためである。 As described above, when the click operation is stopped, the outputs of the two photo reflectors 31a and 31b are both low, and the click position is at the center of a section where the outputs of the two photo reflectors 31a and 31b are both low. This is to stabilize the output signals of the two photo reflectors 31a and 31b when the click operation is stopped.
また、操作リング２の回転方向を検出するために、２つのフォトリフレクタ３１ａ，３１ｂは、一方の出力信号に対して他方の出力信号が、１／４周期ずれるように配置される。本実施形態では、検出用フレキ２８の小型化のため、クリック動作停止時に、互いに隣り合う（隣接する）開口部２２ｂの幅広部２２ｙに２つのフォトリフレクタ３１ａ，３１ｂを配置しているが、出力信号が１／４周期ずれることを条件に、開口部２２ｂ以外に配置してもよい。 Further, in order to detect the rotation direction of the operation ring 2, the two photo reflectors 31a and 31b are arranged such that the other output signal is shifted by a quarter period with respect to the one output signal. In this embodiment, in order to reduce the size of the detection flex 28, when the click operation is stopped, the two photo reflectors 31a and 31b are arranged in the wide portion 22y of the opening 22b adjacent to each other (adjacent). You may arrange | position other than the opening part 22b on the condition that a signal shift | displaces 1/4 period.
以上、操作リング２の回転方向及び回転量の検出方法について説明したが、検出精度を高めるためには環状部材２２が検出手段４２に対してずれることなく、回転することが必要である。 Although the method for detecting the rotation direction and the amount of rotation of the operation ring 2 has been described above, the annular member 22 needs to be rotated without being deviated from the detection means 42 in order to increase the detection accuracy.
環状部材２２と樹脂ベース２１との嵌合の締め代を小さくすれば、環状部材２２の回転時のがたつきを抑えることはできるが、この場合、回転時の摺動抵抗が大きくなり、操作リング２の操作感を損ねる可能性がある。 If the tightness of the fitting between the annular member 22 and the resin base 21 is reduced, rattling during rotation of the annular member 22 can be suppressed. However, in this case, sliding resistance during rotation increases, and the operation There is a possibility of impairing the operational feeling of the ring 2.
したがって、環状部材２２にある程度のがたつきを持たせつつ、環状部材２２を検出手段４２に対してずれることなく回転させることが好ましい。 Therefore, it is preferable to rotate the annular member 22 without shifting with respect to the detection means 42 while giving the annular member 22 a certain amount of rattling.
本実施形態では、クリック機構４１に鋼球２３及びばね２４を用いることにより、環状部材２２に多少のがたつきがあってもばね２４の付勢力により環状部材２２を鋼球２３を中心とする正位置に付勢することができる。ただし、鋼球２３を中心とする環状部材２２の回転時のがたつきは抑えることができない。この場合、クリック機構４１を互いに環状部材２２の周方向に１８０°離間させて２箇所に配置することで、環状部材２２の回転バランスを良くすることができるが、コストが増加し、スペース的にも難しい。 In the present embodiment, by using the steel ball 23 and the spring 24 for the click mechanism 41, the annular member 22 is centered on the steel ball 23 by the biasing force of the spring 24 even if the annular member 22 has some backlash. It can be biased to the normal position. However, rattling during rotation of the annular member 22 around the steel ball 23 cannot be suppressed. In this case, the rotation mechanism of the annular member 22 can be improved by disposing the click mechanisms 41 at two positions apart from each other by 180 ° in the circumferential direction of the annular member 22, but the cost increases and the space is increased. It is also difficult.
図８は、環状部材２２を鋼球２３を中心に０．５°回転させた状態を示す図である。 FIG. 8 is a view showing a state in which the annular member 22 is rotated by 0.5 ° around the steel ball 23.
図８に示すように、鋼球２３の近傍では操作リング２の回転方向及び回転量の検出に利用する環状部材２２の開口部２２ｂのずれは小さく、鋼球２３から離れるほど、開口部２２ｂのずれが大きくなる。従って、検出精度を高めるには、鋼球２３の近傍に検出手段４２のフォトリフレクタ３１ａ，３１ｂを配置するのが好ましい。 As shown in FIG. 8, in the vicinity of the steel ball 23, the deviation of the opening 22 b of the annular member 22 used for detecting the rotation direction and the rotation amount of the operation ring 2 is small. Deviation increases. Therefore, in order to improve the detection accuracy, it is preferable to arrange the photo reflectors 31a and 31b of the detection means 42 in the vicinity of the steel ball 23.
本実施形態は、検出用フレキ２８の本体側コネクタへの接続と、検出手段４２を配置するスペースを考慮して、鋼球２３から環状部材２２の周方向に略９０°離れた位置に検出手段４２のフォトリフレクタ３１ａ，３１ｂを配置している。このように、鋼球２３から環状部材２２の周方向の略９０°以内の領域に検出手段４２のフォトリフレクタ３１ａ，３１ｂを配置することで、環状部材２２の回転時のがたつきが検出精度に与える影響を小さくすることができる。 In the present embodiment, in consideration of the connection of the detection flexible 28 to the main body side connector and the space for arranging the detection means 42, the detection means is located at a position approximately 90 ° away from the steel ball 23 in the circumferential direction of the annular member 22. 42 photo reflectors 31a and 31b are arranged. As described above, by arranging the photo reflectors 31a and 31b of the detecting means 42 in a region within about 90 ° in the circumferential direction of the annular member 22 from the steel ball 23, rattling during rotation of the annular member 22 is detected with accuracy. Can be reduced.
以上に説明したように、本実施形態では、レンズ鏡筒３と装置本体１Ａの底面との間に形成されるスペースにクリック機構４１と検出手段４２を配置しているので、操作リング２を備えるデジタルカメラ１の光軸方向の長さを短くして薄型化を達成することができる。 As described above, in the present embodiment, since the click mechanism 41 and the detection means 42 are arranged in the space formed between the lens barrel 3 and the bottom surface of the apparatus main body 1A, the operation ring 2 is provided. A reduction in thickness can be achieved by shortening the length of the digital camera 1 in the optical axis direction.
また、クリック機構４１により操作リング２の回転操作時にクリック感を発生させることができるので、パラメータを所望の値に設定しやすくすることができる。 In addition, since the click mechanism 41 can generate a click feeling when the operation ring 2 is rotated, the parameter can be easily set to a desired value.
更に、鋼球２３から環状部材２２の周方向の略９０°以内の領域に検出手段４２のフォトリフレクタ３１ａ，３１ｂを配置して、環状部材２２の回転時のがたつきが検出精度に与える影響を小さくしているので、検出手段４２による検出精度を高めることができる。 Furthermore, the photoreflectors 31a and 31b of the detecting means 42 are arranged in a region within about 90 ° in the circumferential direction of the annular member 22 from the steel ball 23, and the influence of the rattling during rotation of the annular member 22 on the detection accuracy. Therefore, the detection accuracy by the detection means 42 can be increased.
なお、本発明の構成は、上記実施形態に例示したものに限定されるものではなく、材質、形状、寸法、形態、数、配置箇所等は、本発明の要旨を逸脱しない範囲において適宜変更可能である。 The configuration of the present invention is not limited to that exemplified in the above embodiment, and the material, shape, dimensions, form, number, arrangement location, and the like can be changed as appropriate without departing from the scope of the present invention. It is.
２ 操作リング
３ レンズ鏡筒
２１ 樹脂ベース
２２ 環状部材
２２ｂ 開口部
２３ 鋼球
４１ クリック機構
４２ 検出手段
2 Operation ring 3 Lens barrel 21 Resin base 22 Annular member 22b Opening 23 Steel ball 41 Click mechanism 42 Detection means
Claims (5)
前記回転操作部材の回転方向と回転量を検出する検出手段と、
前記回転操作部材が回転操作されたときに、クリック感を発生させるクリック機構と、を備え、
前記回転操作部材には、複数の開口部が周方向に等間隔で形成されており、
前記クリック機構は、前記複数の開口部の何れかに係合可能なボール部材と、前記ボール部材を前記回転操作部材に向けて付勢する付勢部材と、を有し、
前記検出手段および前記クリック機構は、前記レンズ鏡筒の光軸方向にて、互いに重なり合わないように配置されており、
前記検出手段は、前記ボール部材から前記回転操作部材の周方向の９０°以内の領域に配置されることを特徴とする撮像装置。 A rotation operation member extrapolated to the lens barrel and capable of rotation operation;
Detecting means for detecting a rotation direction and a rotation amount of the rotation operation member;
A click mechanism for generating a click feeling when the rotation operation member is rotated,
The rotational operation member has a plurality of openings formed at equal intervals in the circumferential direction,
The click mechanism includes a ball member that can be engaged with any of the plurality of openings, and a biasing member that biases the ball member toward the rotation operation member.
The detection means and the click mechanism are arranged so as not to overlap each other in the optical axis direction of the lens barrel,
The imaging device is characterized in that the detection means is arranged in a region within 90 ° of the circumferential direction of the rotation operation member from the ball member.
前記第２の領域が占める前記回転操作部材の周方向の寸法が、前記第１の領域が占める前記回転操作部材の周方向の寸法より大きいことを特徴とする請求項２に記載の撮像装置。 The opening has a first region with which the ball member engages, and a second region that is located on the outer peripheral side of the first region and is detected by the detection means,
The imaging apparatus according to claim 2, wherein a circumferential dimension of the rotational operation member occupied by the second region is larger than a circumferential dimension of the rotational operation member occupied by the first region.
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| JPS6074131U (en) * | 1983-10-26 | 1985-05-24 | 株式会社ニコン | Double click stop device for exposure adjustment control ring |
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