JP3427225B2 - Shutter drive mechanism - Google Patents
Shutter drive mechanismInfo
- Publication number
- JP3427225B2 JP3427225B2 JP31703693A JP31703693A JP3427225B2 JP 3427225 B2 JP3427225 B2 JP 3427225B2 JP 31703693 A JP31703693 A JP 31703693A JP 31703693 A JP31703693 A JP 31703693A JP 3427225 B2 JP3427225 B2 JP 3427225B2
- Authority
- JP
- Japan
- Prior art keywords
- shutter
- drive
- fitting hole
- driving
- blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Shutters For Cameras (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はシャッタ、詳しくはフォ
ーカルプレーンシャッタの駆動機構に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter, and more particularly to a driving mechanism for a focal plane shutter.
【０００２】[0002]
【従来の技術】従来のシャッタ駆動機構の構造を図６に
基づいて説明する。図６は、シャッタ羽根７〜１０がシ
ャッタ基板（不図示）上に設けられた開口部１１を閉鎖
している状態を示している。駆動アーム１はシャッタ基
板に固設された軸２の回りに回転可能に設けられてい
る。駆動アーム１に従動する従動アーム３は、シャッタ
基板（不図示）に固設された軸４の回り回転可能に設け
られている。駆動アーム１を駆動する駆動レバー５は、
軸２の回りに回転可能に設けられている。駆動レバー５
は、駆動アーム１の穴１ａに嵌合するピン５ａと、係止
カギ（不図示）に係止される爪５ｂとを備えている。駆
動レバー５はバネ６によって反時計方向に付勢されてい
る。スリット形成羽根７、カバー羽根８〜１０は、それ
ぞれ駆動アーム１上の軸７ａ、８ａ、９ａ、１０ａに回
転可能に取り付けられている。また、スリット形成羽根
７、カバー羽根８〜１０は、それぞれ従動アーム３上の
軸７ｂ、８ｂ、９ｂ、１０ｂに回転可能に取り付けられ
ている。2. Description of the Related Art The structure of a conventional shutter drive mechanism will be described with reference to FIG. FIG. 6 shows a state in which the shutter blades 7 to 10 close the opening 11 provided on the shutter substrate (not shown). The drive arm 1 is rotatably provided around an axis 2 fixed to the shutter substrate. The driven arm 3 driven by the drive arm 1 is rotatably provided around a shaft 4 fixed to a shutter substrate (not shown). The drive lever 5 that drives the drive arm 1 is
It is rotatably provided around the shaft 2. Drive lever 5
Includes a pin 5a that fits in the hole 1a of the drive arm 1 and a claw 5b that is locked by a locking key (not shown). The drive lever 5 is biased counterclockwise by a spring 6. The slit forming blade 7 and the cover blades 8 to 10 are rotatably attached to the shafts 7a, 8a, 9a and 10a on the drive arm 1, respectively. Further, the slit forming blade 7 and the cover blades 8 to 10 are rotatably attached to the shafts 7b, 8b, 9b and 10b on the driven arm 3, respectively.
【０００３】次に動作（開口部１１を閉鎖する動作）を
説明する。所定のシャッタ時間が経過するまで羽根７〜
１０は、開口部１１の下側（図６中の開口部１１の左下
側）に折り畳まれて待機している。所定のシャッタ時間
が経過すると、係止カギ（不図示）に係止されていた爪
５ｂが解除され、ばね６の付勢力により駆動レバー５が
軸２の回りに反時計方向に回動する。この時、駆動アー
ム１もピン５ａの回動に応じて軸２の回りに反時計方向
に回動する。これによりシャッタ羽根７〜１０は開口部
１１を覆うように展開し、フィルムへの露光を完了す
る。Next, the operation (operation of closing the opening 11) will be described. The blades 7-
10 is folded under the opening 11 (lower left side of the opening 11 in FIG. 6) and stands by. When a predetermined shutter time elapses, the pawl 5b that is locked by the locking key (not shown) is released, and the drive lever 5 is rotated around the shaft 2 in the counterclockwise direction by the urging force of the spring 6. At this time, the drive arm 1 also rotates counterclockwise around the shaft 2 in response to the rotation of the pin 5a. As a result, the shutter blades 7 to 10 are developed so as to cover the opening 11, and the exposure of the film is completed.
【０００４】上述のような従来のシャッタ駆動機構で
は、シャッタ羽根７〜１０自体の走行速度を速めること
により、高速シャッタ秒時（１／８０００秒以上）を達
成していた。In the conventional shutter driving mechanism as described above, the high-speed shutter time (1/8000 seconds or more) is achieved by increasing the traveling speed of the shutter blades 7 to 10 themselves.
【０００５】[0005]
【発明が解決しようとする問題点】しかしながら、シャ
ッタ羽根自体の走行速度を速くすると、駆動アーム１の
穴１ａとピン５ａの嵌合部に作用する力が大きくなる。
この結果、穴１ａが摩耗や面の潰れによって穴１ａ（接
触部１ｂ）が広がったり（図４参照）、穴１ａ部分に割
れ１ｃが生じたり（図５参照）することがあった。However, when the traveling speed of the shutter blade itself is increased, the force acting on the fitting portion between the hole 1a of the drive arm 1 and the pin 5a becomes large.
As a result, the hole 1a (contact portion 1b) may spread (see FIG. 4) or the crack 1c may occur in the hole 1a portion (see FIG. 5) due to wear of the hole 1a or crushing of the surface.
【０００６】穴１ａが広がるとピン５ａとの嵌合ガタが
大きくなり、羽根の走行が不安定になる。このためシャ
ッタの秒時精度は不良となる。また、穴１ａ部に割れが
生じると、羽根は正常に作動しなくなる。本発明はこの
様な問題点を解決するためになされたものであり、駆動
アームの強度を向上させることを目的とする。When the hole 1a is widened, the amount of looseness in fitting with the pin 5a becomes large, and the traveling of the blade becomes unstable. Therefore, the accuracy of the shutter speed per second becomes poor. If the hole 1a is cracked, the blade will not operate normally. The present invention has been made to solve such problems, and an object thereof is to improve the strength of a drive arm.
【０００７】[0007]
【問題点を解決する為の手段】上記問題点の解決のため
に本発明では、第２駆動部材(1) の 嵌合穴(1a)周辺
に、嵌合穴(12a) を持つ補強用の板(12)を固設するとと
もに、この板を第２駆動部材のシャッタ羽根に対向する
面の側に配置した。あるいは、補強用の板が有する嵌合
穴（12a）の直径を第２駆動部材の嵌合穴（1a）の直径
より小さくすることとした。[Means for Solving the Problems] In order to solve the above problems, the present invention provides a reinforcing member having a fitting hole (12a) around the fitting hole (1a) of the second drive member (1). The plate (12) was fixed, and this plate was arranged on the side of the surface of the second drive member which faced the shutter blades. Alternatively, the diameter of the fitting hole (12a) having a plate for reinforcement and a diameter smaller than to Turkey the fitting hole of the second drive member (1a).
【０００８】[0008]
【作用】本発明では、第２駆動部材の嵌合穴の周辺に補
強用の板を固設したので、第２駆動部材の強度を高める
ことができ、第２駆動部材の損傷を低下せしめることが
できる。また、補強用の板を第２駆動部材のシャッタ羽
根に対向する面の側に配置したことにより、シャッタ羽
根全体の板厚を薄くすることができ、補強用の板が有す
る嵌合穴（12a）の直径を第２駆動部材の嵌合穴（1a）
の直径より小さくすることにより、第２駆動部材の穴の
破損防止の効果が増す。 In the present invention, since the reinforcing plate is fixed around the fitting hole of the second driving member, the strength of the second driving member can be increased and the damage of the second driving member can be reduced. You can Further, by disposing the reinforcing plate on the side of the surface of the second drive member that faces the shutter blade, the plate thickness of the entire shutter blade can be reduced, and the fitting hole (12a ) Diameter of the second drive member fitting hole (1a)
By smaller than the diameter, to increase the damage preventing effect of the hole of the second drive member.
【０００９】[0009]
【実施例】図１、図２、図３は本発明を用いた駆動アー
ムの実施例を示す。図１において、駆動アーム１の嵌合
穴１ａ周辺部には、補強用の板１２がピン１３、１４に
よって固設されている。補強用板１２にも嵌合穴１ａと
同一径を持つ嵌合穴１２ａが設けられている。なお、前
述したピン５ａの径は嵌合穴１ａ、１２ａの径と略同一
（機構上、ピン５ａの径の方が若干小さい）である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1, 2 and 3 show an embodiment of a drive arm according to the present invention. In FIG. 1, a reinforcing plate 12 is fixed by pins 13 and 14 around the fitting hole 1 a of the drive arm 1. The reinforcing plate 12 is also provided with a fitting hole 12a having the same diameter as the fitting hole 1a. The diameter of the pin 5a described above is approximately the same as the diameter of the fitting holes 1a and 12a (the diameter of the pin 5a is slightly smaller on the mechanism).
【００１０】また補強用板１２の板厚Ａは、駆動アーム
１の厚みＢよりも厚くなっている。補強用板１２の板厚
Ａを駆動アームのそれより厚くすることで、ピン５ａと
該ピンが嵌合する嵌合穴（実施例では穴１ａと穴１２
ａ、或いは穴１ａの方が穴１２ａよりも径が大きければ
１２ａ）との接触面積を、従来の補強部材を持たないも
のよりも大きくすることができ、接触面圧力も低下せし
めることができる。このため接触部の磨耗や面の潰れ等
の発生を抑えることができる。The plate thickness A of the reinforcing plate 12 is larger than the thickness B of the drive arm 1. By making the plate thickness A of the reinforcing plate 12 thicker than that of the drive arm, the pin 5a and the fitting hole (in the embodiment, the hole 1a and the hole 12) into which the pin is fitted.
If the diameter of a or the hole 1a is larger than that of the hole 12a, the contact area with 12a) can be made larger than that of the conventional one having no reinforcing member, and the contact surface pressure can be reduced. For this reason, wear of contact parts and crushing of surfaces, etc.
It is possible to suppress the occurrence.
【００１１】板１２は、例えばチタン、鉄、アルミニウ
ム等の金属板である。なお駆動アーム１は炭素繊維複合
材、チタン、アルミ等から成る部材である。図２（ａ）
は図１のＡ−Ａ矢視断面図である。図から分かる通り補
強用の板１２は、駆動アーム１の、カバー羽根１０の取
り付けられている側とは反対側に固設されている。この
ような位置に補強用の板１２を設けると、補強用板１２
と前記カバー羽根１０とが衝突しないように注意を払っ
て羽根を設計（特にシャッタ基板に平行な方向の羽根幅
の設計）する必要がないため、羽根の設計の自由度を大
きくできる。The plate 12 is a metal plate made of, for example, titanium, iron, aluminum or the like. The drive arm 1 is a member made of carbon fiber composite material, titanium, aluminum or the like. Figure 2 (a)
FIG. 2 is a sectional view taken along the line AA of FIG. As can be seen from the figure, the reinforcing plate 12 is fixed to the side of the drive arm 1 opposite to the side where the cover blades 10 are attached. When the reinforcing plate 12 is provided at such a position, the reinforcing plate 12
Since it is not necessary to design the blade (in particular, design the blade width in the direction parallel to the shutter substrate) so as not to collide with the cover blade 10, the degree of freedom in the blade design can be increased.
【００１２】図２（ｂ）は補強用の板１２を、駆動アー
ム１の、カバー羽根１０の取り付けられている側と同じ
側に固設した場合の実施例である。一般に軸７ａの頭部
厚さｔ3 よりシャッタ羽根７〜１０が重なったときの厚
さｔ2 のほうが厚いので、このような位置関係に補強用
の板１２を設けると、図２（ａ）の場合のシャッタ羽根
全体の厚さｔ1 よりも、図２ｂの場合の厚さｔ4 の方が
薄くできる。FIG. 2B shows an embodiment in which the reinforcing plate 12 is fixed to the same side of the drive arm 1 as the side where the cover blade 10 is attached. Generally, since the thickness t 2 when the shutter blades 7 to 10 overlap each other is thicker than the head thickness t 3 of the shaft 7a, when the reinforcing plate 12 is provided in such a positional relationship, FIG. The thickness t 4 in the case of FIG. 2b can be made thinner than the thickness t 1 of the entire shutter blade in the case of.
【００１３】図２（ｃ）は補強用板１２にテーパを設け
た実施例である。図２（ｃ）の如く板１２の端部にテー
パ１２ｂ、１２ｃを設けることにより、シャッタ羽根７
〜１０と板１２との接触を回避できるとともに、図２
（ｂ）のものよりも羽根設計の自由度を大きくすること
ができる。また、板１２の設置スペースも少なくするこ
とができる。FIG. 2C shows an embodiment in which the reinforcing plate 12 is provided with a taper. By providing the taper 12b, 12c at the end of the plate 12 as shown in FIG.
10 can be avoided from contacting the plate 12 and
The degree of freedom of the blade design can be made larger than that of (b). Moreover, the installation space for the plate 12 can be reduced.
【００１４】動作については従来のシャッタ駆動機構の
動作と同様であるので、ここでの説明は省略する。な
お、図３は従来のシャッタ駆動機構に本発明の補強用板
１２を設けた外観図（図２（ａ）の場合の外観図）であ
るが、図６との相違点は補強用板１２を設けていること
で、その他の部分は従来例と同じであるためここでの説
明を省略する。上述したような補強用の板１２は、駆動
アーム１のみに限らず露光を開始させるためのシャッタ
羽根や、その他の接触部、嵌合部を持つ部材にも設ける
ことができる。The operation is the same as the operation of the conventional shutter drive mechanism, and the description thereof is omitted here. 3 is an external view of the conventional shutter drive mechanism provided with the reinforcing plate 12 of the present invention (an external view in the case of FIG. 2A), the difference from FIG. 6 is the reinforcing plate 12 Since the other parts are the same as those of the conventional example, the description thereof will be omitted here. The reinforcing plate 12 as described above can be provided not only on the drive arm 1 but also on a shutter blade for starting exposure and other members having a contact portion and a fitting portion.
【００１５】本実施例では板１２をピン１３、１４によ
り駆動アーム１に固設しているが、本発明はこれに限ら
ず、スポット溶接により板１２を駆動アーム１に接合し
てもよい。また本実施例では駆動アーム１の片方の面に
補強用の板１２を接合しているが、本発明はこれに限ら
ず、板１２を駆動アームの両面に設けてより強度を高め
るよう構成しても良い。In the present embodiment, the plate 12 is fixed to the drive arm 1 by the pins 13 and 14, but the present invention is not limited to this, and the plate 12 may be joined to the drive arm 1 by spot welding. Further, in the present embodiment, the reinforcing plate 12 is joined to one surface of the drive arm 1. However, the present invention is not limited to this, and the plate 12 is provided on both surfaces of the drive arm to increase the strength. May be.
【００１６】さらに本実施例では、駆動アーム１の嵌合
穴１ａと補強用板１２の嵌合穴１２ａとの径が同一であ
るとしているが、本発明はこれに限らず、嵌合穴１ａの
径が嵌合穴１２ａの径以上であれば良い。但し、嵌合穴
１ａの径が嵌合穴１２ａの径よりも大きい場合には、駆
動レバー５のピン５ａが嵌合穴１ａのみと接触しないよ
うに補強用板１２を駆動アームに設ける（少なくともピ
ン５ａと嵌合穴１２ａとを接触せしめるようにする）こ
とが必要となる。Further, in this embodiment, the fitting hole 1a of the drive arm 1 and the fitting hole 12a of the reinforcing plate 12 have the same diameter, but the present invention is not limited to this, and the fitting hole 1a is not limited to this. The diameter may be equal to or larger than the diameter of the fitting hole 12a. However, when the diameter of the fitting hole 1a is larger than the diameter of the fitting hole 12a, the reinforcing plate 12 is provided on the drive arm so that the pin 5a of the drive lever 5 does not contact only the fitting hole 1a (at least. It is necessary to bring the pin 5a and the fitting hole 12a into contact with each other.
【００１７】[0017]
【効果】以上のように本発明によれば、第２駆動部材の
嵌合穴の周辺に補強用の板を固設したので、第２駆動部
材の強度を高めることができ、第２駆動部材の損傷を低
下せしめることができる。また、特に請求項１に係る本
発明によれば、シャッタ羽根全体の板厚を薄くすること
ができ、さらに、請求項２に係る発明によれば、割れ１
ｃの発生も防止できるから信頼性の高いシャッタが得ら
れる。As described above, according to the present invention, since the reinforcing plate is fixedly provided around the fitting hole of the second driving member, the strength of the second driving member can be increased and the second driving member can be improved. Can reduce the damage of. Further , particularly according to the present invention according to claim 1, the plate thickness of the entire shutter blade is reduced.
According to the invention of claim 2, the crack 1
Since the occurrence of c can be prevented, a highly reliable shutter can be obtained.
【００１８】[0018]
【図１】図１は本発明を用いた実施例である。FIG. 1 is an embodiment using the present invention.
【図２】図２ａは図１のＡ−Ａ矢視断面図であり、図２
ｂは駆動アームのシャッタ羽根側に補強用板を設けた場
合の断面図であり、図２ｃは補強用板の端部にテーパを
設けた場合の断面図である。2a is a sectional view taken along the line AA of FIG.
FIG. 2b is a sectional view when a reinforcing plate is provided on the shutter blade side of the drive arm, and FIG. 2c is a sectional view when a taper is provided at the end of the reinforcing plate.
【図３】図３は、本発明を用いたシャッタ駆動機構の外
観図である。FIG. 3 is an external view of a shutter drive mechanism using the present invention.
【図４】図４は従来技術の欠点を説明する図である。FIG. 4 is a diagram illustrating a drawback of the conventional technique.
【図５】図５は従来技術の欠点を説明する図である。FIG. 5 is a diagram illustrating a drawback of the conventional technique.
【図６】従来のシャッタ駆動機構の外観図である。FIG. 6 is an external view of a conventional shutter drive mechanism.
１ 駆動アーム １ａ 嵌合穴 ５ 駆動レバー ５ａ ピン １２ 補強用板 １２ａ 嵌合穴 1 drive arm 1a Mating hole 5 Drive lever 5a pin 12 Reinforcing plate 12a Mating hole
Claims (4)
の回動に応じて回動することによりシャッタ羽根を駆動
する第２駆動部材とを有するシャッタ駆動機構におい
て、 前記軸部と嵌合可能な第２嵌合穴を備え、前記第２駆動
部材の前記第１嵌合穴近傍に固設された補強部材を、前
記第２駆動部材の前記シャッタ羽根に対向する面に設け
たことを特徴とするシャッタ駆動機構。1. A shutter provided with a first drive member having a shaft portion and being rotatable, and a first fitting hole capable of being fitted with the shaft portion, and being rotatable according to the rotation of the drive member. A shutter drive mechanism having a second drive member for driving a blade, comprising a second fitting hole capable of fitting with the shaft portion, and fixedly provided in the vicinity of the first fitting hole of the second driving member. A shutter driving mechanism, wherein a reinforcing member is provided on a surface of the second driving member facing the shutter blade.
の回動に応じて回動する第２駆動部材とを有するシャッ
タ駆動機構において、 前記軸部と嵌合可能であるとともに、前記第１嵌合穴の
直径よりも小さい直径を有する第２嵌合穴を備えた補強
部材を、前記第２駆動部材の前記第１嵌合穴近傍に固設
したことを特徴とするシャッタ駆動機構。2. A second drive having a shaft portion and a rotatable first driving member, and a first fitting hole capable of being fitted with the shaft portion, the second driving member rotating according to the rotation of the driving member. In a shutter drive mechanism having a member, a reinforcing member that can be fitted to the shaft portion and that has a second fitting hole having a diameter smaller than the diameter of the first fitting hole is provided to the second driving member. A shutter drive mechanism fixedly provided in the vicinity of the first fitting hole of the member.
ーパ部を備えていることを特徴とする請求項１または２
に記載のシャッタ駆動機構。3. The reinforcing member has a tapered portion at least at one end thereof.
The shutter drive mechanism as described in.
られた開口部を開閉可能なシャッタ羽根を駆動するシャ
ッタ羽根駆動アームであり、 前記第１駆動部材は、前記シャッタ羽根駆動アームを駆
動する駆動レバーであることを特徴とする請求項１また
は２に記載のシャッタ駆動装置。4. The second drive member is a shutter blade drive arm for driving a shutter blade capable of opening and closing an opening provided in a shutter substrate, and the first drive member drives the shutter blade drive arm. claim 1 also characterized in that it is a drive lever
Is a shutter driving device described in 2 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31703693A JP3427225B2 (en) | 1993-12-16 | 1993-12-16 | Shutter drive mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31703693A JP3427225B2 (en) | 1993-12-16 | 1993-12-16 | Shutter drive mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07168248A JPH07168248A (en) | 1995-07-04 |
| JP3427225B2 true JP3427225B2 (en) | 2003-07-14 |
Family
ID=18083709
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31703693A Expired - Lifetime JP3427225B2 (en) | 1993-12-16 | 1993-12-16 | Shutter drive mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3427225B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6009319B2 (en) * | 2012-11-01 | 2016-10-19 | セイコープレシジョン株式会社 | Blade driving device and optical apparatus |
| JP2017227735A (en) * | 2016-06-22 | 2017-12-28 | 日本電産コパル株式会社 | Shutter blade and imaging apparatus |
-
1993
- 1993-12-16 JP JP31703693A patent/JP3427225B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07168248A (en) | 1995-07-04 |
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