JPH01316731A - Film controller for camera - Google Patents

Abstract

PURPOSE:To reduce loose winding and to improve the certainly of automatic loading by providing a control member for controlling the tip position of a film when the tip of the film is set. CONSTITUTION:The front end 9a of the control member 9 abuts on a spool 2 by being energized by a spring 10 associatively with the opening operation of a rear cover 12 and the tip of the leader part of the film is controlled inwardly by the control member 9. When the rear cover 12 is closed, a roller 15 which is supported by a guide member 13 abuts on the spool 2 across the film F by being energized by the spring 14 and the control member 9 has its rear end part 9b pressed against the rear cover 12, so that the front end part 9a moves away to the side wall of the spool chamber 1s of a camera main body 1 against the spring 10. Consequently, the certainty of the film automatic loading is improved.

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a device for regulating the position of the tip of a portion of a film leader when loading film into a camera having an autoloading mechanism.

<Conventional technology> Conventionally, in the autoloading of cameras, there have been two methods: (a) a spool drive system that transmits power only to the spool and hooks the spool claw onto the film to wind it up; and (b)
There is a sprocket drive method in which the film is fed by a sprocket and wound onto the spool, and (C) a method in which the first half is fed by a sprocket and the second half is wound using only the spool by switching the power transmission system from the sprocket to the spool using a clutch, etc. Three are known.

<Problems to be Solved by the Invention> By the way, in the spool drive method described in (a) above, if the length from the perforation hole of the film where the spool claw is caught to the tip is longer than the outer diameter of the spool, the bulge cannot be absorbed. Otherwise, there is a risk that curling may occur.

That is, when loading a cartridge and setting the leading end of a part of the film leader, this is affected by variations in the setting position, and this occurs when the setting position is deep to some extent.

Also, in the other methods (b) and (C), loose winding often occurs when the setting position is deep.

SUMMARY OF THE INVENTION In view of the problems of the prior art described above, it is an object of the present invention to provide a film regulating device for a camera that improves the reliability of automatic film loading.

Means for Solving the Problems> In order to achieve the above-mentioned object, the present invention provides a camera having an automatic film feed device, which includes a spool for winding a film in a spool chamber, a back cover, and a back cover of the back cover. It has a regulating member that regulates the position of the leading edge of the film in conjunction with the opening/closing operation, and the regulation member I11 is exposed in a direction in which it comes into contact with the spool when the back cover is opened, and is retracted when the back cover is opened. η゛.

Also, applicable regulations! It is effective that the 1J811 material forms part of the spool chamber when it is retracted.

Further, the regulating member preferably has a shape that smoothly guides the leading end of the film to the wall of the spool chamber when the regulating member is retracted.

Furthermore, it is preferable that the regulating member has a shape that avoids the claw of the spool when exposed.

<Function> The camera of the present invention configured as described above is provided with a regulating member that regulates the leading edge position of the film in conjunction with the opening/closing operation of the back cover, and when the back cover is opened during film loading, the regulating member By coming into contact with the spool, it is possible to limit the setting position of a part of the film leader and increase the success rate of autorope ink, and when the back cover is closed, the regulating member retreats from the spool surface. Film can be wound reliably.

In addition, when the back cover is closed and the regulating member is retracted from the spool surface, the regulating member forms a part of the spool chamber side wall and is shaped to be smoothly connected to the spool chamber side wall, so that the leading end of the film is It can be guided smoothly to the spool.

Furthermore, when the back cover is opened and the regulating member is exposed in the direction in which it contacts the spool, the abutting end of the regulating member does not come into contact with the film perforation locking claw on the spool.
The set position of a part of a film leader can be set reliably, and the claws are not damaged.

<Example> Embodiments of the present invention will be described below based on the drawings.

1 to 4, 1 is a camera body, and a spool 2 having a perforation locking pawl 2a for winding up a film F is rotatably supported in a spool chamber 1a on the side thereof.

Reference numeral 3 denotes a guide member for guiding the film F to the spool 2. The guide member 3 is pivoted near a part of the aperture in the spool chamber 1a and is biased toward the spool 2 by a spring 4. A roller 5 is attached to the tip of the guide member. is rotatably supported.

Reference numeral 6 denotes a pair of photointerrupters for optically detecting perforations in the film F. As shown in FIG. The slit light +11
The position of 6b is set to avoid the rounded corners of the perforations of the film F and to be closer to the outside. Reference numeral 8 denotes a cover that covers the photointerrupter 6 and the upper part of the spool chamber 1a, and as shown in FIG. The width of the leader part of film F is m
Compared to Pi! The length is generous, so
This will serve as a guide when setting the leader part of film F.
It is possible to limit the vertical deflection of a part of the leader of the film F. Further, each of the covers 7 and 8 has a convex portion 7 for guiding the notched end f of the film F so that it does not get caught in the groove portion 6a of the photointerrupter 6.
a and 8a are provided. Reference numeral 9 denotes a regulating member for regulating the set position of the film F toward the back side, which is pivotally supported near the hinge portion 12a of the back cover 12 of the spool chamber 1a, and is moved toward the spool 2 side (counterclockwise in FIG. 2) by a spring 10. When the back cover 112 is opened, the front end 9a comes into contact with the spool 2, and when the back cover 12 is closed, the rear end 9b is pushed by the back M12 and rotates clockwise, and the spool 2 is energized. Room 1a @LM
The shape is such that it smoothly connects to the 11
is an index that serves as a guide for the setting position of the leading end of the leader portion of the film F, and is pasted below the spool chamber 1a.

The back cover 12 is pivotally supported on the spool chamber 1a side of the camera body 1 so as to be openable and closable by a hinge part 12a, and a guide part 413 for guiding the film F to the spool 2 is pivotally supported on the inner surface of the back cover 12. 14, the guide member 13 is always urged toward the spool 2 when the guide member 13 is running, and a roller 15 is rotatably supported at the tip of the guide member 13. Note that 16 is a cartridge loaded on the other side of the camera body.

To explain the operation of this embodiment with the above configuration, first, open the back cover 12 and insert the batten 16 into the camera body 1.
and place the film F so that the leading end of the film F is aligned with the mark 11 (FIGS. 1 and 3). Here, the indicator 11 is affixed slightly to the right in the figure from where the roller 15 comes into contact with the spool 2 when the back cover is closed.

As shown in FIG.
a comes into contact with the spool 2, and the leading end of a portion of the leader of the film F is regulated by the regulating member 9 toward the back side. Therefore, the regulating member 9 is set at a position with enough margin so that the length of the film F from the perforation where the claw part 2a of the spool 2 is caught to the tip of the leader part is shorter than the outer diameter of the spool 2, and the claw part It has a shape that revolves around 2a.

Next, when the back cover 12 is turned as shown in FIG. The rear end 9b of 9 is pressed against the back cover 12, and the front end 9 is pushed against the spring 10 toward the side wall of the spool chamber 1a of the camera body 1.
a evacuates.

At this time, the regulating member 9 forms a part of the wall of the spool chamber 1alttll so as to smoothly guide the leading end of the film F.

Therefore, as shown in FIG. 6a, the spool 2 is rotated in the direction of the arrow from the power transmission system (not shown), and the claw PIS2 is rotated in the direction of the arrow.
a is engaged with the perforation of the film F near where the roller 15 comes into contact with the spool 2 and is fed, and as shown in FIG. It is guided to the guide member 3 by the spool chamber 1a (l!!) formed by the film, passes through the roller 5, and is guided to the spool 2 (FIG. 6C).Then, the perforation of the film F engaged with the claw portion 2a As it passes through the roller 5, the portion from 1 to the tip gets under the film F that is being wound up, and the bulge of the film F that is being wound up is absorbed (FIG. 6d).

Then, the perforations of the film F are counted by the photo interrupter 6, and the film stops when an appropriate amount has been wound, and the auto-loading ends.

Note that although the autoloading of the camera in this embodiment uses a spool drive method, it is effective to provide a similar regulating member in other drive methods as well.

<Effects of the Invention> As explained above, the present invention provides a regulating member for regulating the position of the leading edge of the film when setting the leading edge of the film, thereby making it possible to reduce the number of rolls by 1, thereby improving auto-loading. This has the effect of improving reliability. .

[Brief explanation of the drawing]

FIG. 1 shows a camera filter according to an embodiment of the present invention. Figure 2 is a front view of the main parts of the system control device, and Figure 2 is A-AIi in Figure 1.
lft side view, Figure 3 is a front view of the main part when the film is set, Figure 4 is a configuration diagram of the photointerrupter, (a) is a side view, (b) is a sectional view, and Figure 5 is a front view of the main part when setting the film. Cross-sectional views when setting the film, (a) with the back cover open, (b)
) shows the back lid closed state, and Fig. 6(a) and ~(
d) is a sectional view illustrating the film feeding state. 1...Camera body, 1a...Spool chamber, 2...
Spool, 2a...Perforage controller locking claw, 3゜13...Guide member, 4.10.14...Spring, 5
゜15, ... roller, 6 ... photo interrupter,
7゜8...Cover, 9...Regulating member, 11...Indicator, 12...Back cover, F...Film. Figure 3 Figure 4 Figure 5 (a) Figure 6 (a) (k)) (c) (d)

Claims (1)

[Claims] 1. In a camera having an automatic feed device, there is provided a spool for winding the film which is rotatably supported in a spool chamber, a back cover, and a position of the leading edge of the film that is linked to the opening/closing operation of the back cover. 1. A film regulating device for a camera, comprising a regulating member that is exposed in a direction that contacts the spool when the back cover is opened, and is retracted when the front cover is closed. 2. The film regulating device for a camera according to claim 1, wherein the regulating member forms a part of the spool chamber when retracted. 3. The film regulating device for a camera according to claim 1 or 2, wherein the regulating member has a shape that smoothly guides the leading end of the film to the side wall of the spool chamber when retracted. 4. The film regulating device for a camera according to claim 1, wherein the regulating member has a shape that avoids a claw of the spool when exposed in a direction in which it comes into contact with the spool.