【０００１】
【発明の属する技術分野】本発明はカメラのファインダ装置に関し、特にレンズの調節のできるファインダ装置に関する。
【０００２】
【従来の技術】従来、カメラ等の撮影装置では、構成する各部材の製造上の寸法誤差等により当初の設計中心から光学的なずれが生じ、これを補正するための調整が必要になることがある。例えば実装式のファインダでは、ファインダレンズの組立工程において、対物レンズを光軸と直交する方向に移動して視差の調整を行う視差調整や、ファインダ像のピント調整を行う視度調整を行っていた。
【０００３】
近年カメラの小型化によりファインダの光学レンズ及びその保持機構に求められる精度が厳しくなってきており、その調整も微妙かつ複雑な為、高度な熟練が必要であった。
【０００４】
そこで、特許文献１によれば対物レンズを上下調節ネジと左右調節ネジを用いることで特殊な工具や熟練作業を要求されることなく、視差調整を容易に行うことができる技術が提案されている。
【０００５】
【特許文献１】
特開２００２−６３６９号公報
【０００６】
【発明が解決しようとする課題】
しかしながら、上述したレンズの調整機構において視度調整を行う場合、調整ネジを回動しすぎて対物レンズを調整範囲以上に移動すると、対物レンズが他の部材に当たるとともに、調節ネジと対物レンズの接触部が破損する場合がある。
【０００７】
また、調節ネジを保持している枠体が変形し、レンズ位置を調整することができない場合もある。
【０００８】
したがって、本発明は叙上に鑑みて鋭意研究の結果なされたものであり、その目的は、調節ネジを回動しすぎても関係する部品の破損を防止し、簡単に視度調整や視差調整を行うことができるファインダ装置のレンズの調整機構を提供することにある。
【０００９】
【課題を解決するための手段】
本発明のファインダ装置によれば、光軸と略直交する方向及び略光軸方向に移動可能な少なくとも１枚のレンズと、前記レンズを光軸と略直交する方向及び略光軸方向に移動を行う少なくとも２以上のレンズ調整機構と、前記レンズに少なくとも２以上の支持部を設け、該支持部の少なくとも１つに貫通して光軸に略平行に延在する貫通部材と、該貫通部材の一方端を回動中心から外れた部位に配設可能な凹部を有する偏心部材と、該偏心部材と前記貫通部材の他方端を回動可能に保持する保持部材とを備えることを特徴とする。
【００１０】
本発明の他のファインダ装置によれば、光軸と略直交する方向及び略光軸方向に移動可能な少なくとも１枚のレンズと、前記レンズを光軸と略直交する方向及び略光軸方向に移動を行う少なくとも２以上のレンズ調整機構と、前記レンズを支持する少なくとも２以上の支持部と、該支持部の少なくとも１つに貫通して、かつ光軸に略平行に配設する貫通部材と、回動可能でかつ回動中心から外れた位置で前記貫通部材と一体となす偏心部材と、を備え、前記偏心部材と前記貫通部材の他方端を回動可能に保持する保持部材とを備えることを特徴とする。
【００１１】
本発明の他のファインダ装置によれば、前記支持部のうち少なくとも１つを付勢する弾性部材と、該弾性部材の付勢方向で、かつ前記保持部の少なくとも１つに螺合可能な調節部とを備え、前記調節部を回動して前記弾性部材の付勢方向と反対方向に前記支持部を押すことを特徴とする。
【００１２】
【発明の実施の形態】
以下、本発明のファインダ装置のレンズの調整機構について、図でもって説明する。図１は本発明のファインダ装置の斜視図であり、図２は図１に示すファインダ装置から枠体をはずした際の斜視図である。図３は本発明のファインダ装置の概要図であり、（ａ）はその正面図であり、（ｂ）はその断面図である。図４は偏心部材を回動したときのレンズの移動位置を示すファインダ装置の正面図であり、（ａ）〜（ｇ）はそれぞれ偏心部材の回動に対応した対物レンズの位置である。図５は、対物レンズ１を上方向に移動した際の図であり、（ａ）は正面図、（ｂ）は説明図、（ｃ）は断面図である。
【００１３】
本発明のファインダ装置は、図１及び図２に示す如く、対物レンズ１に支持部１０及び支持部１１を設け、ファインダ装置の光軸に略並行でかつ前記支持部１０を貫通して回動可能なレンズ軸２を設け、該レンズ軸２の一方端を回動可能に略コ字状の一方端側で保持する枠体８を設け、前記支持部１０と枠体８の一方端側との間に圧縮バネ５を設けて前記支持部１０を前記枠体８の略コ字状の他方端側に付勢し、枠体８の他方端側に回動可能でかつ回動の略中心部からずれた位置に凹部を設けた偏心部材３を配設するとともに、前記レンズ軸２の他方端を前記偏心部材３の凹部に配設し、さらに前記支持部１０を枠体８の一方端側に移動する調節ネジ部材７を螺合している。
【００１４】
また、一方の支持部１１は、枠体９に設けた捩りバネ部材４にて前記レンズ軸２の略直交方向に付勢されるとともに、前記枠体９に螺合する調節ネジ部材６に接触させている。この調節ネジ部材６は所要に回動させることで前記支持部１１を光軸に対して略垂直方向に移動させることができる。
【００１５】
なお、本例において偏心部材３の回動の中心部はファインダ装置の正面図（図３）に示された略円状の偏心部材３の略円の中心とし、レンズ軸２の他方端を偏心部材３の凹部に配設する位置は、偏心部材３の回動に伴い、略円の中心から一定の長さをもった位置で略円上に回動する。
また、前記レンズ軸２の他方端と前記偏心部材３の凹部とは、圧接またはポリ系の接着部材で接着して接合し、特に偏心部材３の凹部に対応してレンズ軸２の他方端の形状を決めて圧接することで、接着用の部材は必要なく組立ても容易にすることができる。
【００１６】
ここで、図４でもって、対物レンズ１の位置調整について説明すると、図４の（ａ）は対物レンズ１の基準位置であり、レンズ軸２の他方端を偏心部材３の凹部に配設する位置は、偏心部材３の回動中心から略最下端に位置している。
【００１７】
前記対物レンズの位置を左又は右側に移動する場合は、同図の（ｄ）及び（ｅ）に示す如く、偏心部材３を時計方向に９０度又は反時計方向に９０度回動することで、レンズ軸２の他方端を偏心部材３の凹部に配設する位置は、偏心部材３の回動中心から略最左端又は略右端に位置し、これに対応して対物レンズ１も左側または右側に移動される。
【００１８】
また、レンズ軸２の他方端を偏心部材３の凹部に配設する位置は、基準位置より図から上方向に移動することに伴い、対物レンズの中心部も微小に上方向に移動しているので、前記枠体９に螺合する調節ネジ部材６を回動して、偏心部材３の回動により上方向に対物レンズ１が移動した分だけ下方向に調節することで、支持部材２を下方向に移動して、対物レンズ１も下方向に移動し、対物レンズ１の中心部を基準位置から平行に左側又は右側に移動することができる。
【００１９】
次に、対物レンズ１の基準位置より下方向に移動したい場合は、図の（ｂ）又は（ｃ）に示す如く、調節ネジ部材６をさらに回動して、該調節ネジ部材６を下方向に捩じ込むことで、調節ネジ部材６に接触している支持部材２が下方向に移動し、対応して対物レンズ１も下方向に移動できる。
【００２０】
一方、対物レンズ１を上方向に移動する場合は、図の（ｆ）又は（ｇ）に示す如く、該調節ネジ部材６を下方向に捩じ込む場合と反対方向に回動させ上方向に引き出すことで、調節ネジ部材６に接触している支持部材２が上方向に移動し、対応して対物レンズ１を上方向に移動できる。
【００２１】
また、図５に示す如く、偏心部材３を１８０度回動して偏心部材３の凹部とレンズ軸２との配設部の位置をこの移動範囲の最上端に移動することで、支持部１０も最上端になり、これに対応して調整ネジ部材６を回動して上方向に移動することで、対物レンズ１の中心部の位置を略垂直に上方向に移動できる。
【００２２】
したがって、支持部材２は捩りバネ４によって、調節ネジ部材６に付勢されているので、調節ネジ部材６を回動しすぎても、他の部材を破損させることはない。
【００２３】
また、偏し部材３を回動して、対物レンズ１を移動しているので、回動しすぎたとしても、１回動すれば元の位置に戻るので、これによっても他の部材を破損する心配がない。
【００２４】
次に、対物レンズ１を光軸方向と略並行に移動する場合は、調節ネジ部材７を回動し、該回動によって調節ネジ部材７と前記支持部１０とが接触している部位を光軸方向と略並行方向に移動して行う。
【００２５】
かくして、本発明のファインダ装置の調整機構によれば、対物レンズ１を偏心部材３にて、上下左右方向に移動することができることで、対物レンズ１を破損させることなく、調整することができる。
【００２６】
また、偏心部材３のよって対物レンズの上下方向の調整を行うこともできるが、調節ネジ部材６を用いることで、対物レンズの上下方向を大きく調整することができるとともに、対物レンズの光軸方向の調節も調節ネジ部材７で行うことができることで、簡便に視差調節及び視度調節が行える。
【００２７】
なお、本発明は上記実施の形態例に限定されるものではなく、本発明の要旨を逸脱しない範囲内で種々の変更や改良等は何ら指し支えない。
【００２８】
例えば、対物レンズ１の移動に、調節ネジ部材６，７を用いたが、これに限定されず、モータ等の駆動部材を用いて、対物レンズ１の支持部１０，２を押す仕組みとし、調整を行うことができる。
【００２９】
また、圧縮バネ５や捩りバネ部材４を用いたがこれに限定されず、ゴム等の弾性部材を用いても、同様の効果が得られる。
【００３０】
さらに、レンズ軸２の他方端を偏心部材３の凹部を溶接やその他の方法で接合又は一体部品としてもよい。こうすることで部品点数を減らすことができる。
【００３１】
【発明の効果】
かくして、本発明のファインダ装置のレンズ調節機構によれば、調節ネジを回動しすぎても関係する部品の破損を防止し、簡単に視度調整や視差調整を行うことができた。
【図面の簡単な説明】
【図１】本発明のファインダ装置の斜視図である。
【図２】図１に示すファインダ装置から枠体をはずした際の斜視図である。
【図３】本発明のファインダ装置の概要図であり、（ａ）はその正面図であり、（ｂ）はその断面図である。
【図４】偏心部材を回動したときの対物レンズの移動位置を示すファインダ装置の正面図であり、（ａ）〜（ｇ）はそれぞれ偏心部材を回動に対応したレンズ位置である。
【図５】対物レンズ１を上方向に移動した際の図であり、（ａ）は正面図、（ｂ）は説明図、（ｃ）は断面図である。
【符号の説明】
１・・・対物レンズ
２・・・レンズ軸
３・・・偏心部材
４・・・捩りバネ
５・・・圧縮バネ
６・・・調節ネジ部材
７・・・調節ネジ部材
８・・・枠体
９・・・枠体[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a finder device for a camera, and more particularly to a finder device capable of adjusting a lens.
[0002]
2. Description of the Related Art Conventionally, in a photographing apparatus such as a camera, an optical deviation from an initial design center occurs due to a dimensional error in manufacture of each constituent member, and an adjustment for correcting the optical deviation is required. There is. For example, in the mountable viewfinder, in the assembly process of the viewfinder lens, the parallax adjustment for adjusting the parallax by moving the objective lens in a direction orthogonal to the optical axis and the diopter adjustment for adjusting the focus of the viewfinder image were performed. .
[0003]
In recent years, the precision required for the optical lens of the viewfinder and its holding mechanism has become strict due to the miniaturization of the camera, and the adjustment thereof is delicate and complicated, requiring a high degree of skill.
[0004]
Therefore, according to Patent Literature 1, there is proposed a technique in which parallax adjustment can be easily performed by using an up / down adjustment screw and a left / right adjustment screw as an objective lens without requiring special tools or skilled work. .
[0005]
[Patent Document 1]
JP-A-2002-6369
[Problems to be solved by the invention]
However, when the diopter adjustment is performed by the above-described lens adjustment mechanism, if the adjustment screw is rotated too much and the objective lens is moved beyond the adjustment range, the objective lens hits another member, and the adjustment screw contacts the objective lens. The part may be damaged.
[0007]
In some cases, the frame holding the adjustment screw is deformed and the lens position cannot be adjusted.
[0008]
Therefore, the present invention has been made as a result of intensive studies in view of the above description, and its purpose is to prevent damage to related components even if the adjusting screw is turned excessively, and to easily adjust diopter or parallax. It is an object of the present invention to provide a lens adjustment mechanism of a finder device capable of performing the following.
[0009]
[Means for Solving the Problems]
According to the finder device of the present invention, at least one lens movable in a direction substantially orthogonal to the optical axis and in the optical axis direction, and moving the lens in a direction substantially orthogonal to the optical axis and in the optical axis direction. At least two or more lens adjustment mechanisms for performing, at least two or more support portions provided on the lens, a penetrating member penetrating at least one of the support portions and extending substantially parallel to the optical axis; An eccentric member having a concave portion that can be disposed at a position where one end is deviated from the center of rotation, and a holding member that rotatably holds the eccentric member and the other end of the penetrating member are provided.
[0010]
According to another finder device of the present invention, at least one lens movable in a direction substantially perpendicular to the optical axis and in a substantially optical axis direction, and the lens is moved in a direction substantially perpendicular to the optical axis and in a substantially optical axis direction. At least two or more lens adjustment mechanisms for performing movement, at least two or more support portions for supporting the lens, and a penetrating member that penetrates at least one of the support portions and is disposed substantially parallel to the optical axis. An eccentric member that is rotatable and integrated with the penetrating member at a position off the center of rotation, and a holding member that rotatably holds the other end of the eccentric member and the penetrating member. It is characterized by the following.
[0011]
According to another finder device of the present invention, an elastic member for urging at least one of the support portions, and an adjustment member capable of being screwed to at least one of the holding portions in the urging direction of the elastic member. Wherein the adjusting section is rotated to push the support section in a direction opposite to a biasing direction of the elastic member.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the lens adjusting mechanism of the finder device of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of the finder device of the present invention, and FIG. 2 is a perspective view of the finder device with the frame removed from the finder device shown in FIG. 3A and 3B are schematic views of the finder device of the present invention, in which FIG. 3A is a front view and FIG. 3B is a cross-sectional view. FIG. 4 is a front view of the finder device showing the movement position of the lens when the eccentric member is rotated. FIGS. 4A to 4G show the positions of the objective lens corresponding to the rotation of the eccentric member. 5A and 5B are views when the objective lens 1 is moved upward, FIG. 5A is a front view, FIG. 5B is an explanatory view, and FIG. 5C is a cross-sectional view.
[0013]
In the finder device of the present invention, as shown in FIGS. 1 and 2, the objective lens 1 is provided with a support portion 10 and a support portion 11, and is rotated substantially parallel to the optical axis of the finder device and through the support portion 10. A frame 8 is provided, which is provided with a possible lens shaft 2 and one end of the lens shaft 2 is rotatably held at one end of a substantially U-shape. A compression spring 5 is provided therebetween to urge the support portion 10 toward the other substantially U-shaped end of the frame 8 so as to be rotatable toward the other end of the frame 8 and substantially at the center of rotation. An eccentric member 3 having a concave portion provided at a position deviated from the portion is disposed, the other end of the lens shaft 2 is disposed in a concave portion of the eccentric member 3, and the support portion 10 is connected to one end of a frame 8. The adjustment screw member 7 that moves to the side is screwed.
[0014]
The one support portion 11 is urged by a torsion spring member 4 provided on the frame 9 in a direction substantially orthogonal to the lens shaft 2, and comes into contact with the adjusting screw member 6 screwed to the frame 9. Let me. By rotating the adjusting screw member 6 as required, the support portion 11 can be moved in a direction substantially perpendicular to the optical axis.
[0015]
In this example, the center of rotation of the eccentric member 3 is the center of the substantially circular eccentric member 3 shown in the front view of the finder device (FIG. 3), and the other end of the lens shaft 2 is eccentric. The position provided in the concave portion of the member 3 rotates substantially on the circle at a position having a certain length from the center of the substantially circle with the rotation of the eccentric member 3.
Further, the other end of the lens shaft 2 and the concave portion of the eccentric member 3 are joined by pressing or bonding with a poly-based adhesive member. By determining the shape and pressing, it is possible to easily assemble the components without the need for a bonding member.
[0016]
Here, the position adjustment of the objective lens 1 will be described with reference to FIG. 4. FIG. 4A shows a reference position of the objective lens 1, and the other end of the lens shaft 2 is disposed in a concave portion of the eccentric member 3. The position is located at the lowermost end from the center of rotation of the eccentric member 3.
[0017]
When the position of the objective lens is moved left or right, the eccentric member 3 is rotated clockwise by 90 degrees or counterclockwise by 90 degrees as shown in (d) and (e) of FIG. The position where the other end of the lens shaft 2 is disposed in the concave portion of the eccentric member 3 is located substantially at the leftmost or rightmost position from the center of rotation of the eccentric member 3, and the objective lens 1 is also left or right correspondingly. Moved to
[0018]
In addition, the position where the other end of the lens shaft 2 is disposed in the concave portion of the eccentric member 3 moves upward from the reference position in the figure, and the center of the objective lens also moves slightly upward. Therefore, the support screw 2 is adjusted by moving the objective lens 1 upward by the rotation of the eccentric member 3 by turning the adjustment screw member 6 screwed to the frame body 9, thereby allowing the support member 2 to move. Moving downward, the objective lens 1 also moves downward, and the center of the objective lens 1 can be moved to the left or right in parallel from the reference position.
[0019]
Next, when it is desired to move the objective lens 1 downward from the reference position, the adjusting screw member 6 is further rotated as shown in FIG. The support member 2 that is in contact with the adjusting screw member 6 moves downward, and the objective lens 1 can move correspondingly downward.
[0020]
On the other hand, when the objective lens 1 is moved upward, as shown in (f) or (g) of the drawing, the adjustment screw member 6 is turned in the opposite direction to the case where the adjustment screw member 6 is screwed downward, and is turned upward. By pulling out, the support member 2 in contact with the adjusting screw member 6 moves upward, and the objective lens 1 can correspondingly move upward.
[0021]
Further, as shown in FIG. 5, by rotating the eccentric member 3 by 180 degrees, the position of the portion where the concave portion of the eccentric member 3 and the lens shaft 2 are disposed is moved to the uppermost end of this moving range, so that the supporting portion 10 Is also at the top end, and the position of the center of the objective lens 1 can be moved substantially vertically upward by rotating the adjustment screw member 6 and moving it upward accordingly.
[0022]
Therefore, since the support member 2 is urged by the torsion spring 4 to the adjusting screw member 6, even if the adjusting screw member 6 is rotated too much, the other members will not be damaged.
[0023]
In addition, since the biasing member 3 is rotated to move the objective lens 1, even if it rotates excessively, it returns to the original position if it rotates once, so that other members may be damaged. Don't worry.
[0024]
Next, when the objective lens 1 is moved substantially in parallel with the optical axis direction, the adjusting screw member 7 is rotated, and the portion where the adjusting screw member 7 and the supporting portion 10 are in contact with each other is lighted. It is performed by moving in a direction substantially parallel to the axial direction.
[0025]
Thus, according to the adjustment mechanism of the finder device of the present invention, the objective lens 1 can be moved in the up, down, left, and right directions by the eccentric member 3, so that the adjustment can be performed without damaging the objective lens 1.
[0026]
Although the eccentric member 3 can be used to adjust the vertical direction of the objective lens, the adjustment screw member 6 can be used to greatly adjust the vertical direction of the objective lens, and can also adjust the optical axis direction of the objective lens. Can be adjusted by the adjusting screw member 7, so that parallax adjustment and diopter adjustment can be easily performed.
[0027]
It should be noted that the present invention is not limited to the above embodiment, and various changes and improvements may be made without departing from the spirit of the present invention.
[0028]
For example, although the adjusting screw members 6 and 7 are used for moving the objective lens 1, the present invention is not limited to this, and a mechanism for pushing the support portions 10 and 2 of the objective lens 1 using a driving member such as a motor is used. It can be performed.
[0029]
Further, although the compression spring 5 and the torsion spring member 4 are used, the present invention is not limited to this, and similar effects can be obtained by using an elastic member such as rubber.
[0030]
Further, the other end of the lens shaft 2 may be joined to the concave portion of the eccentric member 3 by welding or other methods, or may be formed as an integral part. By doing so, the number of parts can be reduced.
[0031]
【The invention's effect】
Thus, according to the lens adjusting mechanism of the finder device of the present invention, even if the adjusting screw is excessively rotated, damage of related components can be prevented, and diopter adjustment and parallax adjustment can be easily performed.
[Brief description of the drawings]
FIG. 1 is a perspective view of a finder device of the present invention.
FIG. 2 is a perspective view when a frame is removed from the finder device shown in FIG. 1;
3A and 3B are schematic views of a finder device of the present invention, in which FIG. 3A is a front view and FIG. 3B is a cross-sectional view thereof.
FIG. 4 is a front view of the finder device showing a moving position of the objective lens when the eccentric member is rotated, and FIGS. 4A to 4G are lens positions corresponding to the rotation of the eccentric member.
FIGS. 5A and 5B are views when the objective lens 1 is moved upward, FIG. 5A is a front view, FIG. 5B is an explanatory view, and FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Objective lens 2 ... Lens axis 3 ... Eccentric member 4 ... Torsion spring 5 ... Compression spring 6 ... Adjustment screw member 7 ... Adjustment screw member 8 ... Frame 9 ... frame
