JPH03108209U

JPH03108209U -

Info

Publication number: JPH03108209U
Application number: JP1696790U
Authority: JP
Priority date: 1990-02-22
Filing date: 1990-02-22
Publication date: 1991-11-07

Description

[Brief explanation of the drawing]

第１図は本考案によるカメラ用シヤツターの第
一実施例を示す分解斜視図、第２図は第一実施例
の要部断面図、第３図はシヤツター羽根の略平面
図、第４図はヨーク端部と永久磁石との関係を示
す図であつて、Ａは初期位置、Ｂは全開位置、Ｃ
は全閉位置を夫々示す図、第５図はパルス波形と
開口波形を示す図、第６図は第一実施例の変形例
を示す連係ピンとカム溝の平面図、第７図は本考
案の第二実施例を示す連係ピンとカム面の平面図
、第８図は第二実施例の変形例を示す第７図と同
様な図、第９図乃至第１１図は本考案の第三実施
例を示すものであり、第９図は連係ピンとカム溝
を示す平面図、第１０図は小絞り時のシヤツター
羽根の開口位置を示す平面図、第１１図は開口波
形を示す図、第１２図は第三実施例の変形例を示
す図、第１３図及び第１４図は第三実施例につい
て夫々カム溝をカム面に変更した実施例を示す図
、第１５図は従来のシヤツターの要部平面図であ
る。１０，１１……シヤツター羽根、１４……永久
磁石、１５，１５′……連係ピン、１６，１６′
，２５，２５′……カム溝、１６″，１６，２
５″，２５……カム面。 Fig. 1 is an exploded perspective view showing a first embodiment of a camera shutter according to the present invention, Fig. 2 is a sectional view of essential parts of the first embodiment, Fig. 3 is a schematic plan view of the shutter blade, and Fig. 4 is a It is a diagram showing the relationship between the yoke end and the permanent magnet, where A is the initial position, B is the fully open position, and C is the fully open position.
5 is a diagram showing the fully closed position, FIG. 5 is a diagram showing a pulse waveform and an opening waveform, FIG. 6 is a plan view of a linking pin and a cam groove showing a modification of the first embodiment, and FIG. 7 is a diagram showing a variation of the first embodiment. A plan view of a linking pin and a cam surface showing a second embodiment, FIG. 8 is a view similar to FIG. 7 showing a modification of the second embodiment, and FIGS. 9 to 11 are a plan view of a third embodiment of the present invention. Fig. 9 is a plan view showing the linking pin and cam groove, Fig. 10 is a plan view showing the aperture position of the shutter blade when the aperture is small, Fig. 11 is a view showing the aperture waveform, and Fig. 12. 13 and 14 are diagrams showing a modification of the third embodiment, respectively, in which the cam grooves are changed to cam surfaces, and FIG. 15 is a diagram showing the main parts of a conventional shutter. FIG. 10, 11... Shutter blade, 14... Permanent magnet, 15, 15'... Linking pin, 16, 16'
, 25, 25'...cam groove, 16'', 16, 2
5″, 25…Cam surface.

Claims

[Scope of utility model registration request]

The first shutter blade is linked to a drive source that is driven by energization or de-energization from the shutter control circuit, and the second shutter blade is linked to the operation of the first shutter blade to open and close the shutter. 1. A camera shutter adapted to be operated, characterized in that one shutter blade is provided with a linking pin, and the other shutter blade is provided with a cam that engages the linking pin.