JPH01176824U - - Google Patents
Info
- Publication number
- JPH01176824U JPH01176824U JP7305488U JP7305488U JPH01176824U JP H01176824 U JPH01176824 U JP H01176824U JP 7305488 U JP7305488 U JP 7305488U JP 7305488 U JP7305488 U JP 7305488U JP H01176824 U JPH01176824 U JP H01176824U
- Authority
- JP
- Japan
- Prior art keywords
- diaphragm
- step motor
- switch
- rotating member
- switch piece
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
Landscapes
- Diaphragms For Cameras (AREA)
Description
第１図は本考案実施例の電磁駆動絞り装置の組
立図、第２図ａ，ｂは本考案実施例の絞り開放状
態検出スイツチの作動図、第３図は従来の電磁駆
動絞り装置の斜視図、第４図は従来の電磁駆動絞
り装置の組立図、第５図ａ〜ｅは従来の絞り開放
状態検出スイツチの作動図、第６図は本考案の他
の実施例の絞り開放状態検出スイツチの拡大図。
１は地板、２はステツピングモーター、３はピ
ニオンギヤ、５はスイツチ取付台、６はバネ、７
はスイツチピン、１０は回転部材、１０ｃはギヤ
、１０ｄは突起部、１０ｅは突起、１０ｆは凹部
。
Figure 1 is an assembly diagram of the electromagnetically driven diaphragm device according to the embodiment of the present invention, Figures 2a and b are operational diagrams of the aperture open state detection switch according to the embodiment of the present invention, and Figure 3 is a perspective view of the conventional electromagnetically driven diaphragm device. 4 are assembly diagrams of a conventional electromagnetically driven diaphragm device, FIGS. 5 a to 5 e are operational diagrams of a conventional aperture open state detection switch, and FIG. 6 is an aperture open state detection according to another embodiment of the present invention. Enlarged view of the switch. 1 is the main plate, 2 is the stepping motor, 3 is the pinion gear, 5 is the switch mount, 6 is the spring, 7
10 is a switch pin, 10 is a rotating member, 10c is a gear, 10d is a projection, 10e is a projection, and 10f is a recess.
Claims (1)
よつて開閉される光路孔を中心部に有した環状の
回転部材と、該回転部材の中心線に対して偏心し
た中心軸線を有すると共に該光路孔より外側の位
置に配置された該回転部材の回転駆動用のステツ
プ・モーターと、該ステツプ・モーターの駆動軸
の出力回転を前記回転部材に伝達する歯車機構と
、前記光路孔が前記遮光羽根によつて変化し、絞
りが開放状態になつた際に、前記回転部材、前記
歯車機構等の前記ステツプ・モーターの出力回転
にて回転する部材により、弾性付勢されるスイツ
チ片を該弾性付勢に抗して当接移動させて、前記
絞りの開放状態位相を検知するスイツチ機構を設
け、この前記スイツチ機構は絞りが開放状態へ移
行している状態にて前記部材が絞り込み方向へ回
転した際に、前記スイツチ片による弾性負荷が高
くなるように形状設定したことを特徴とする電動
式露光調整装置。 An annular rotating member that supports a plurality of light shielding blades and has an optical path hole in the center that is opened and closed by the light shielding blades, and has a central axis eccentric to the center line of the rotating member and the optical path hole a step motor for rotationally driving the rotary member disposed at an outer position; a gear mechanism for transmitting the output rotation of the drive shaft of the step motor to the rotary member; Therefore, when the aperture changes and the diaphragm becomes open, the switch piece, which is elastically biased, is elastically biased by a member that rotates with the output rotation of the step motor, such as the rotating member or the gear mechanism. A switch mechanism is provided that detects the opening state phase of the diaphragm by moving it into contact with the diaphragm against the diaphragm, and the switch mechanism detects the opening state of the diaphragm when the member rotates in the diaphragm direction while the diaphragm is transitioning to the open state. An electric exposure adjustment device characterized in that the shape of the switch piece is set so that the elastic load exerted by the switch piece is high.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7305488U JPH01176824U (en) | 1988-05-31 | 1988-05-31 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7305488U JPH01176824U (en) | 1988-05-31 | 1988-05-31 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01176824U true JPH01176824U (en) | 1989-12-18 |
Family
ID=31298204
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7305488U Pending JPH01176824U (en) | 1988-05-31 | 1988-05-31 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01176824U (en) |
-
1988
- 1988-05-31 JP JP7305488U patent/JPH01176824U/ja active Pending
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