JPS626731U

JPS626731U -

Info

Publication number: JPS626731U
Application number: JP9964485U
Authority: JP
Priority date: 1985-06-28
Filing date: 1985-06-28
Publication date: 1987-01-16

Description

[Brief explanation of the drawing]

第１図は本考案の一実施例にかかるカメラのフ
イルム位置決め機構の要部を示す分解斜視図、第
２，３，４図は夫々最大巻き上げ位置、最大オー
バーラン位置及び最大逆転位置における上記フイ
ルム位置決め機構の平面図である。１……巻取アイドルギア、２……巻き止め制御
カム、３……逆転防止カム、３ａ……係合面、４
……第１レバー、４ａ……折曲部、４ｂ……切欠
部、４ｃ……一端端面、４ｄ……切欠部端面、５
……第２レバー、５ａ……一端端面、５ｂ……切
欠部、５ｃ……切欠部端面、５ｄ……折曲部、６
……第２偏心ピン、７……オーバーラン防止レバ
ー、７ａ……折曲部、８……第１偏心ピン、９…
…抜け止めリング、１０……オーバーラン防止カ
ム、１１……スプロケツトギア、１２……ねじり
ばね、１３……ばね。 Fig. 1 is an exploded perspective view showing the main parts of the film positioning mechanism of a camera according to an embodiment of the present invention, and Figs. 2, 3, and 4 show the film at the maximum winding position, maximum overrun position, and maximum reverse position, respectively. FIG. 3 is a plan view of the positioning mechanism. DESCRIPTION OF SYMBOLS 1... Winding idle gear, 2... Winding stop control cam, 3... Reversal prevention cam, 3a... Engaging surface, 4
...First lever, 4a...Bending portion, 4b...Notch, 4c...One end end surface, 4d...Notch end surface, 5
...Second lever, 5a...One end surface, 5b...Notch portion, 5c...Notch end surface, 5d...Bending portion, 6
...Second eccentric pin, 7...Overrun prevention lever, 7a...Bending portion, 8...First eccentric pin, 9...
...Keeping ring, 10...Overrun prevention cam, 11...Sprocket gear, 12...Torsion spring, 13...Spring.

Claims

[Claims for Utility Model Registration] A film reversal prevention cam 3 that is rotatable in conjunction with a film winding shaft, and an engaging surface 4c of one end engages with an engaging surface 3a of the reversal prevention cam 3, a first lever 4 for overrun positioning that determines the maximum overrun amount of the reversal prevention cam 3; an overrun prevention cam 10 that rotates integrally with a sprocket gear 11 rotatable together with the winding shaft; an overrun prevention lever 7 whose one end engagement surface 7a engages with the engagement surface 10a of the overrun prevention cam 10 to prevent overrun at the maximum overrun position of the prevention cam 3; The first eccentric pin 8 moves the cam toward and away from the overrun prevention cam 10, and the first engagement surface 5a or the second engagement surface 5c at one end engages with the engagement surface 3a of the reverse prevention cam 3. At the same time, a second lever 5 for preventing film reversal, which positions the normal winding position or maximum reversal position of the reversal prevention cam 3, and the first lever 4 and the second lever 5 for preventing reversal are coaxially arranged. a second eccentric pin 6 that supports and integrally moves one end of the first lever 4 and one end of the second lever 5 toward and away from the reverse rotation prevention cam 3; When adjusting the position of 3, the above-mentioned reversal prevention cam 3 when the film winding is completed.
The engaging surface 4c of the first lever 4 or the first and second engaging surfaces 5a of the second lever 5,
5c is sequentially engaged to perform film overrun prevention adjustment and reverse rotation prevention adjustment such that the reverse rotation prevention cam 3 is positioned within a predetermined angle range.