JPS63107426U

JPS63107426U -

Info

Publication number: JPS63107426U
Application number: JP20168886U
Authority: JP
Priority date: 1986-12-27
Filing date: 1986-12-27
Publication date: 1988-07-11

Description

[Brief explanation of drawings]

第１図から第５図は本考案を実施したフオーカ
ルプレーンシヤツターのチヤージ機構部の動作説
明図で、第１図はシヤツター走行完了後の状態、
第２図はシヤツターチヤージ途中の先羽根駆動レ
バーが先羽根緊定レバーに係止した直後の状態、
第３図はシヤツターチヤージ途中の後羽根駆動レ
バーが後羽根緊定レバーに係止した直後の状態、
第４図はシヤツターチヤージが完了してオーバー
チヤージの状態、第５図はシヤツターチヤージレ
バーシヤツター走行直前の所定位置への復帰行程
の途中で先羽根駆動レバーが、先羽根緊定レバー
に係止した状態、第６図はチヤージレバーのスト
ロークとその戻し力の関係についての説明図。１……チヤージレバー、２……先羽根駆動レバ
ー、３……後羽根駆動レバー、４……先羽根緊定
レバー、５……後羽根緊定レバー、６……シヤツ
ター地板、７……チヤージレバー戻しバネ、８…
…チヤージレバー戻し補助バネ。 Figures 1 to 5 are explanatory diagrams of the operation of the charge mechanism of the focal plane shutter embodying the present invention, and Figure 1 shows the state after the shutter has completed running;
Figure 2 shows the state immediately after the leading blade drive lever locks with the leading blade locking lever during shutter charging.
Figure 3 shows the state immediately after the rear blade drive lever locks with the rear blade tension lever during shutter charge.
Figure 4 shows the overcharge state after the shutter charge has been completed, and Figure 5 shows the shutter charge lever in the state of overcharging when the leading blade drive lever is in the middle of the return process to the predetermined position just before the shutter runs. FIG. 6 is an explanatory diagram of the relationship between the stroke of the charge lever and its return force when the charge lever is locked in the fixed state. 1... Charge lever, 2... Leading blade drive lever, 3... Trailing blade driving lever, 4... Leading blade tensioning lever, 5... Trailing blade tensioning lever, 6... Shutter base plate, 7... Charge lever return Spring, 8...
...Charge lever return auxiliary spring.

Claims

[Scope of utility model registration request]

A shutter comprising: a blade drive lever to which a spring urging force for urging the shutter blades to travel; and a charge lever for charging the blade drive lever from a travel position to a travel preparation position against the spring bias force. , a first spring configuration that applies a biasing force for the entire return stroke in the movement of the charge lever in the charge release direction, and a second spring configuration that applies a biasing force only for the first stroke of the charge lever in the charge release direction. A shutter characterized by having a spring configuration.