JP3939621B2 - Camera lens attachment attachment / detachment mechanism using a ring spring - Google Patents

Camera lens attachment attachment / detachment mechanism using a ring spring Download PDF

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Publication number
JP3939621B2
JP3939621B2 JP2002274262A JP2002274262A JP3939621B2 JP 3939621 B2 JP3939621 B2 JP 3939621B2 JP 2002274262 A JP2002274262 A JP 2002274262A JP 2002274262 A JP2002274262 A JP 2002274262A JP 3939621 B2 JP3939621 B2 JP 3939621B2
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Prior art keywords
ring
spring
filter
camera
attachment
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Expired - Fee Related
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JP2002274262A
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JP2004109719A (en
Inventor
和廣 佐藤
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マルミ光機 株式会社
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Description

【0001】
【発明の属する分野】
本発明はカメラのレンズアタッチメント着脱機構に関するものである。
本発明のカメラ等に於けるレンズアタッチメント着脱機構は、例えば、カメラの撮影レンズ前面に装着するレンズ表面の保護用フィルターや紫外線カット用フィルター、モノクロ用フィルター等、フィルターを撮影レンズ前面に装着するための着脱機構で、カメラのレンズ鏡筒最前部にフィルターを装着、または取り外しの際、該操作がワンタッチで行える着脱機構を提供するものである。
【0002】
【従来の技術】
カメラの撮影用レンズ鏡筒の最前部内径側には通常、フィルターやフードなど撮影用レンズのアタッチメントを装着するために雌ネジが螺設されており、他方装着されるフィルターやフードなどのアタッチメント側には雄ネジが螺設されており、フィルターやフードなどのアタッチメントをそのネジ部による螺合により着脱している。
【0003】
而して前記アタッチメントをネジ部により螺合する着脱機構は、フィルターの場合を例にすると次の欠点がある。即ち、カメラの撮影用レンズ鏡筒の最前部に螺設された雌ネジにフィルターの雄ネジを螺着する初めの嵌合操作は、意外と手間取るものであり、独特の勘と操作慣れが必要であり、且つ、ネジ部のネジピッチが細かいため装着するフィルターを何回も回転させて、所定位置に装着する必要がある。
【0004】
従って初めの雄ネジと雌ネジの嵌合操作を誤ると撮影用レンズとフィルターのネジ山を壊してしまうこともあり、また螺合操作であるため、所定位置での螺着の加減を間違えるとネジ部が圧着されてしまい取り外しに苦労するという不都合な着脱機構であった。
【0005】
【発明が解決しようとする課題】
本発明は、従来のカメラのフィルター着脱機構が上述の欠点を有し大きな問題点であったことに鑑みてなされたものであり、本発明に係るフィルター着脱機構は撮影現場にて、ワンタッチで簡単、且つ容易に着脱が可能で、又、フィルターの交換も素速く行えて、シャッターチャンスにも即対応できるフィルターの着脱機構を提供することを目的とする。
【0006】
また、本発明のフィルター着脱機構は、撮影用レンズ鏡筒の最前部内径側に通常的に螺設されたアタッチメント装着用の雌ネジ部に装着されるものであって、本発明のフィルターを装着するために特別なアダプターを特には必要としないので、フィルターのみならず、該フィルターと同一部位に装着されるフードやキャップ等、他のカメラのレンズアタッチメント着脱機構としても十分に利用可能である。
【0007】
【課題を解決するための手段】
本発明は上記の目的を達成するために、フィルターを挟持したフィルター外枠と一体化して形成された挿着部を設け、該挿着部はカメラの撮影用レンズ鏡筒の最前部内径側雌ネジ部に挿着可能な外径を持ち、該挿着部の外周部にスプリング嵌合溝を刻設し、該挿着部の外周部に刻設されたスプリング嵌合溝にリング形状で一カ所に切欠部を有するリング型スプリングを嵌着させ、該リング型スプリングが切欠部を介して前記スプリング嵌合溝内で円周方向のバネ作用をするのを利用して、前記フィルターの挿着部がカメラの撮影用レンズ鏡筒の最前部内径側に挿着されたときリング型スプリング働いて最前部内側に係着してフィルターが撮影用レンズ鏡筒最前部に装着され、該フィルターの取り外しは前記挿着部のリング型スプリングの押圧力に対向した力で抜脱するよう構成することにより、フィルターをカメラの撮影用レンズ鏡筒の最前部にワンタッチで着脱自在に装着可能にしたものである。
【0008】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて具体的に説明する。
図1はカメラの撮影用レンズ鏡筒の最前部に本発明のレンズアタッチメント着脱機構を具備したフィルターを装着した例を示す要部断面図、図2は図1に用いられるリング型スプリングの形状説明図をそれぞれ示している。
【0009】
図1乃至図2において、1はカメラの撮影用レンズ鏡筒、2は該レンズ鏡筒の最前部、3はレンズ鏡筒の最前部に螺設されたレンズアタッチメント装着用の雌ネジ部である。
【0010】
前記雌ネジ部3にはフィルター4を挟持したフィルター外枠5と一体化されて形成された挿着部6が設けられており、該挿着部6はカメラの撮影用レンズ鏡筒1の最前部2の内径側雌ネジ部3に挿着可能な外径を有し、該挿着部6の外周部7にはスプリング嵌合溝8刻設されている。
【0011】
而して、スプリング嵌合溝8には、リング形状で一カ所に切欠部9を有するリング型スプリング10が嵌着されており、該リング型スプリング10が切欠部9を介して前記スプリング嵌合溝8内で円周方向のバネ作用を利用して、前記フィルター4の挿着部6がカメラの撮影用レンズ鏡筒1の内径側雌ネジ部3に装着されたときリング型スプリング10が働いてフィルター4の挿着部6が内径側雌ネジ部3に係着される。
尚、図2は前述したリング型スプリング10と該リング型スプリング10の一カ所に設けられる切欠部9の形状を示しており、また、該リング型スプリング10の断面形状は、図1、及び図3に示されるように円形断面形状を持っている。
【0012】
斯くして、挿着部6に刻設された嵌合溝8に嵌着されたリング型スプリング10からなる着脱機構は、フィルター4の挿着部6がカメラの撮影用レンズ鏡筒2の最前部2の内径雌ネジ部3に挿着するときは前記リング型スプリング10がレンズ鏡筒2の内径雌ネジ部3端部に突き当たり、リング型スプリング10を圧縮してスプリング嵌合溝8内に埋没せしめ、該埋没した分の反発力にて内径ネジ部3内に係着してフィルター4をレンズ鏡筒1の最前部2に装着できる。そして該装着操作はワンタッチの嵌合操作となる。
【0013】
また、前記装着されたフィルター4の取り外しは、フィルター4の外枠5を抜脱することによりワンタッチで、簡単、且つ容易に行える。
【0014】
而して、本発明は他の実施様態として、カメラレンズの他のアタッチメントであるフードの着脱機構や、レンズキャップの着脱機構として実施しても有効であり、図3はその一例としてレンズフードの実施例に基づき説明する。
【0015】
図3において、11はフード本体、6は該フード本体11と一体化して設けられた挿着部、7は挿着部6に設けられた外周部で有り、該挿着部6の外周部7にはスプリング嵌合溝8が刻設されており、該スプリング嵌合溝8にはリング型スプリング10が嵌着されている。
【0016】
斯くして、図3の実施様態は、レンズ鏡筒1の最前部2にレンズアタッチメントのフード本体11を、装着した例を示し、その作用は図1乃至図2にて説明した実施様態と同様となり、該フード本体11の着脱はワンタッチでおこなえる。
また、上述の着脱機構は、レンズキャップの着脱機構としても利用でき、その利用範囲は、幅の広いものである。
【0017】
【発明の効果】
而して、本発明は従来の着脱機構が、雌ネジと雄ネジの螺合による装着操作で、雌ネジと雄ネジの初めの螺合操作が、意外と手間取るものであり、独特の勘と操作慣れが必要で、該初めの螺合操作を誤ると撮影用レンズとアタッチメントのネジ山を壊してしまうおそれがあったものを解消したと云える。
【0018】
また、従来の着脱機構が、ネジ部による螺着で、該ネジ部のネジピッチが細かいため装着するレンズアタッチメントを何回も回転させて所定位置に装着したり、所定位置での螺着の加減を間違えるとネジ部が圧着されてしまい取り外しに苦労するということも、なくすことができた 。
【0019】
そして、本発明によれば、撮影現場にあっても、ワンタッチで簡単、且つ容易にレンズアタッチメントを着脱可能なカメラのレンズアタッチメント着脱機構を提供することができたのであり、本発明実施による効果は大である。
【図面の簡単な説明】
【図1】カメラレンズに本発明の着脱機構を具備したフィルターを装着した例を示す要部切欠断面図である。
【図2】リング型スプリングの形状説明図である。
【図3】他の実施例を示す説明図である。
【符号の説明】
1 カメラの撮影用レンズ鏡筒
2 レンズ鏡筒の最前部
3 雌ネジ部
4 フィルター
5 フィルター外枠
6 挿着部
7 外周部
8 スプリング嵌合溝
9 切欠部
10 リング型スプリング
11 フード本体
[0001]
[Field of the Invention]
The present invention relates to a lens attachment / detachment mechanism for a camera.
The lens attachment attachment / detachment mechanism in the camera or the like of the present invention is for attaching a filter to the front surface of the photographing lens, such as a protective filter for the lens surface attached to the front surface of the photographing lens of the camera, an ultraviolet cut filter, a monochrome filter or the like. This attachment / detachment mechanism provides an attachment / detachment mechanism in which the operation can be performed with one touch when a filter is attached to or removed from the foremost lens barrel of the camera.
[0002]
[Prior art]
The inner diameter of the front lens barrel of the camera is usually threaded with a female screw to attach the attachment of the photographic lens, such as a filter or hood, and the other attachment side of the filter or hood to be attached A male screw is screwed, and attachments such as a filter and a hood are attached and detached by screwing with the screw portion.
[0003]
Thus, the attachment / detachment mechanism for screwing the attachment with the screw portion has the following drawbacks when the filter is taken as an example. In other words, the initial fitting operation of screwing the filter male screw into the female screw screwed at the forefront of the camera lens barrel is surprisingly troublesome and requires a unique intuition and operational familiarity. In addition, since the thread pitch of the thread portion is fine, it is necessary to rotate the filter to be mounted many times to mount it at a predetermined position.
[0004]
Therefore, if the fitting operation of the first male screw and female screw is mistaken, the photographing lens and the thread of the filter may be broken, and it is a screwing operation. It was an inconvenient attachment / detachment mechanism in which the screw part was crimped and it was difficult to remove.
[0005]
[Problems to be solved by the invention]
The present invention has been made in view of the fact that the conventional filter attaching / detaching mechanism of the camera has the above-mentioned drawbacks and has been a big problem, and the filter attaching / detaching mechanism according to the present invention is simple and one-touch at the shooting site. Another object of the present invention is to provide a filter attachment / detachment mechanism that can be easily attached / detached, can be quickly replaced, and can respond immediately to a photo opportunity.
[0006]
Further, the filter attaching / detaching mechanism of the present invention is attached to a female thread portion for attachment mounting usually screwed on the foremost inner diameter side of the photographing lens barrel, and is equipped with the filter of the present invention. In order to do so, a special adapter is not particularly required, so that it can be used not only as a filter but also as a lens attachment attaching / detaching mechanism for other cameras such as a hood and a cap attached to the same part as the filter.
[0007]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an insertion portion formed integrally with a filter outer frame sandwiching a filter, and the insertion portion is a frontmost inner diameter side female of a photographing lens barrel of a camera. It has an outer diameter that can be inserted into the screw part, and a spring fitting groove is formed on the outer peripheral part of the insertion part, and the spring fitting groove formed on the outer peripheral part of the insertion part has a ring shape. A ring-type spring having a notch portion is fitted at a place, and the ring-type spring is inserted into the spring fitting groove by using a circumferential spring action through the notch portion. When the part is inserted into the front inner diameter side of the camera lens barrel for the camera, a ring-type spring works to engage with the inner front part, and the filter is attached to the front lens lens barrel. Is the pressure of the ring-shaped spring of the insertion part A By configured to pull-out by opposing force is obtained by a detachably mounted by one-touch at the forefront of the imaging lens barrel of the camera filters.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be specifically described below with reference to the drawings.
FIG. 1 is a cross-sectional view of an essential part showing an example in which a filter equipped with a lens attachment attaching / detaching mechanism of the present invention is attached to the foremost part of a photographing lens barrel of a camera, and FIG. 2 is an explanation of the shape of a ring-type spring used in FIG. Each figure is shown.
[0009]
1 and 2, reference numeral 1 denotes a camera lens barrel, 2 denotes a frontmost portion of the lens barrel, and 3 denotes a female thread portion for mounting a lens attachment screwed to the frontmost portion of the lens barrel. .
[0010]
The female screw portion 3 is provided with an insertion portion 6 formed integrally with a filter outer frame 5 sandwiching a filter 4, and the insertion portion 6 is provided at the forefront of the photographing lens barrel 1 of the camera. It has an outer diameter that can be inserted into the inner diameter side female screw portion 3 of the portion 2, and a spring fitting groove 8 is formed in the outer peripheral portion 7 of the insertion portion 6.
[0011]
Thus, a ring-type spring 10 having a ring shape and having a notch portion 9 is fitted in the spring fitting groove 8, and the ring-type spring 10 is inserted into the spring fitting via the notch portion 9. A ring-shaped spring 10 works when the insertion portion 6 of the filter 4 is attached to the inner diameter side female screw portion 3 of the photographing lens barrel 1 of the camera by utilizing the circumferential spring action in the groove 8. Thus, the insertion portion 6 of the filter 4 is engaged with the inner diameter side female screw portion 3.
FIG. 2 shows the shape of the ring-type spring 10 and the notch 9 provided at one location of the ring-type spring 10. The cross-sectional shape of the ring-type spring 10 is shown in FIGS. 3 has a circular cross-sectional shape.
[0012]
Thus, the attachment / detachment mechanism comprising the ring-shaped spring 10 fitted in the fitting groove 8 engraved in the insertion portion 6 is such that the insertion portion 6 of the filter 4 is at the forefront of the photographing lens barrel 2 of the camera. When the ring-shaped spring 10 is attached to the inner diameter female thread portion 3 of the portion 2, the ring-shaped spring 10 hits the end of the inner diameter female thread portion 3 of the lens barrel 2, and the ring-type spring 10 is compressed into the spring fitting groove 8. The filter 4 can be attached to the frontmost portion 2 of the lens barrel 1 by being buried and engaged with the inner diameter screw portion 3 by the repulsive force of the buried portion. The mounting operation is a one-touch fitting operation.
[0013]
The attached filter 4 can be easily and easily removed with one touch by removing the outer frame 5 of the filter 4.
[0014]
Thus, the present invention is also effective as another embodiment of the present invention even when implemented as a hood attaching / detaching mechanism or a lens cap attaching / detaching mechanism, which is another attachment of the camera lens. FIG. This will be described based on examples.
[0015]
In FIG. 3, reference numeral 11 denotes a hood main body, 6 denotes an insertion portion provided integrally with the hood main body 11, and 7 denotes an outer peripheral portion provided on the insertion portion 6, and an outer peripheral portion 7 of the insertion portion 6. A spring fitting groove 8 is formed in the ring, and a ring spring 10 is fitted in the spring fitting groove 8.
[0016]
Thus, the embodiment of FIG. 3 shows an example in which the hood body 11 of the lens attachment is mounted on the foremost portion 2 of the lens barrel 1, and the operation thereof is the same as that of the embodiment described with reference to FIGS. Thus, the hood body 11 can be attached and detached with one touch.
Moreover, the above-mentioned attachment / detachment mechanism can also be used as a lens cap attachment / detachment mechanism, and the range of use is wide.
[0017]
【The invention's effect】
Thus, according to the present invention, the conventional attaching / detaching mechanism is a mounting operation by screwing of the female screw and the male screw, and the first screwing operation of the female screw and the male screw is surprisingly troublesome. Familiarity is necessary, and it can be said that the problem that the screw thread of the photographing lens and the attachment may be broken if the initial screwing operation is mistaken is solved.
[0018]
In addition, the conventional attachment / detachment mechanism is screwed by a screw part, and since the screw pitch of the screw part is fine, the lens attachment to be attached is rotated many times to be attached at a predetermined position, and screwing at a predetermined position is adjusted. If you make a mistake, the screw part will be crimped and it will be difficult to remove.
[0019]
According to the present invention, it is possible to provide a lens attachment attaching / detaching mechanism for a camera that can be attached and detached easily and easily with a single touch even at a shooting site. It ’s big.
[Brief description of the drawings]
FIG. 1 is a cutaway cross-sectional view of an essential part showing an example in which a filter equipped with an attachment / detachment mechanism of the present invention is attached to a camera lens.
FIG. 2 is an explanatory diagram of the shape of a ring spring.
FIG. 3 is an explanatory diagram showing another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Camera lens barrel 2 Front lens part 3 Female thread part 4 Filter 5 Filter outer frame 6 Insertion part 7 Outer part 8 Spring fitting groove 9 Notch part 10 Ring type spring 11 Hood body

Claims (2)

フィルターを挟持したフィルター外枠と一体化して形成された挿着部を設け、
前記挿着部はカメラの撮影用レンズ鏡筒の最前部内径側に螺設されている雌ネジ部に挿着可能な外周部を持ち、
該挿着部の外周部にスプリング嵌合溝を刻設し、
該挿着部の外周部に刻設されたスプリング嵌合溝にリング形状で一カ所に切欠部を有し円形断面形状を持ったリング型スプリングを嵌着させ、
該リング型スプリングが該切欠部を介して前記スプリング嵌合溝内で円周方向のバネ作用をすることを利用して、前記フィルターの挿着部がカメラの撮影用レンズ鏡筒の最前部内径側に挿着されたときリング型スプリングが働いて最前部内径側に螺設された雌ネジ部内に係着し、該フィルターが前記レンズ鏡筒の最前部に装着され、
該フィルターの取り外しは前記挿着部のリング型スプリングの押圧力に対向した力で抜脱することを特徴とする、
リング型スプリングを用いたカメラのレンズアタッチメント着脱機構。
Provide an insertion part formed integrally with the filter outer frame sandwiching the filter,
The insertion portion has an outer peripheral portion that can be inserted into a female screw portion screwed on the foremost inner diameter side of the photographing lens barrel of the camera,
Engrave a spring fitting groove on the outer periphery of the insertion part,
A ring-shaped spring having a circular cross-sectional shape having a ring- shaped cutout at one location is fitted into a spring fitting groove carved on the outer peripheral portion of the insertion portion,
Utilizing the fact that the ring-shaped spring exerts a spring action in the circumferential direction in the spring fitting groove through the notch, the insertion portion of the filter is the inner diameter of the foremost portion of the camera lens barrel. When the ring-type spring is inserted into the side, the ring-type spring works and engages in the female screw part screwed on the foremost inner diameter side , and the filter is attached to the foremost part of the lens barrel,
The removal of the filter is characterized in that it is removed by a force opposed to the pressing force of the ring-shaped spring of the insertion part ,
Lens attachment / detachment mechanism for the camera using a ring spring.
前面にレンズのフード機能やレンズキャップ機能を持つカメラレンズのアタッチメント本体と一体化して形成された挿着部を設け、
前記挿着部はカメラの撮影用レンズ鏡筒の最前部内径側に螺設されている雌ネジ部内に挿着可能な外径を持ち、
該挿着部の外周部にスプリング嵌合溝を刻設し、
該挿着部の外周部に刻設されたスプリング嵌合溝にリング形状で一カ所に切欠部を有し円形断面形状を持ったリング型スプリングを嵌着させた構成とし、
前記カメラレンズアタッチメント本体の挿着部がレンズ鏡筒の最前部内径側に挿着されたときリング型スプリングが作用してレンズアタッチメントの係合部が該最前部内側に螺設された雌ネジ部内に係着するようにしたこと、
を特徴とした請求項1記載のリング型スプリングを用いたカメラのレンズアタッチメント着脱機構。
An insertion part formed integrally with the camera lens attachment body with the lens hood function and lens cap function is provided on the front,
The insertion portion has an outer diameter that can be inserted into a female screw portion screwed on the foremost inner diameter side of the photographing lens barrel of the camera,
Engrave a spring fitting groove on the outer periphery of the insertion part,
A ring-shaped spring having a circular cross-sectional shape with a ring- shaped cutout at one location in a spring fitting groove carved on the outer periphery of the insertion portion,
When the insertion portion of the camera lens attachment main body is inserted into the foremost inner diameter side of the lens barrel, a ring-type spring acts and the engagement portion of the lens attachment is screwed inside the foremost portion. To be engaged in,
The lens attachment / detachment mechanism for a camera using the ring spring according to claim 1.
JP2002274262A 2002-09-20 2002-09-20 Camera lens attachment attachment / detachment mechanism using a ring spring Expired - Fee Related JP3939621B2 (en)

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JP3939621B2 true JP3939621B2 (en) 2007-07-04

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JP2007086194A (en) * 2005-09-20 2007-04-05 Kenkoo:Kk Optical accessory fitting device
CN110146960A (en) * 2019-05-23 2019-08-20 江门市卡色光学有限公司 Connection structure, adapter ring, filter, lens cap and filter group

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