JPH0430588Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a film winding device for a self-winding type camera using a double cartridge.

In the conventional camera described above, the shutter is released after the first frame, regardless of whether there is film or not, when the shutter winding is completed, so when using film that is shorter than the specified number of shots, the shutter is released after the first frame. This may cause the screen to cut out. Various cameras have already been proposed that detect the trailing edge of the film and use the signal to prevent the shutter from being released. The next winding could not be done, and the rear end of the film had not yet been wound into the cartridge, so I had to open the rear cover to change the film.
It had some drawbacks, such as the last frame becoming curly and unusable.

SUMMARY OF THE INVENTION An object of the present invention is to provide a device which can prevent the above-mentioned drawbacks by detecting the trailing edge of the film and regulating the operation of the shutter release and take-up lever stopper based on a signal from the trailing edge of the film.

The film winding device for a camera according to the present invention is a self-winding type camera using a double cartridge, and includes a film winding interlocking member having an engaging portion interlocking with a film winding means, and a film winding device for winding one frame of film. a film winding amount regulating means that engages with an engaging portion of the film winding interlocking member in the raised position to make the film winding interlocking member immovable and regulating the film winding amount to one frame; Interlocking with the engaging operation of the film winding amount regulating means, the movement of the shutter release button is restricted so that the release operation cannot be performed when the film winding amount regulating means is not engaged with the engaging portion of the film winding interlocking member. a shutter release regulating means, a film trailing edge detecting means provided on the film feeding side of the cartridge and moving as the trailing edge of the film passes; and a film trailing edge detecting means interlocked with the movement of the film trailing edge as the trailing edge of the film passes. and a lifting amount restriction release means for restricting the lifting amount regulating means to be inoperable.

The present invention will be described below based on an embodiment of the accompanying drawings.

The hoisting gear 1 is integrally supported coaxially with a hoisting lever (not shown), and the hoisting ratchet wheel 2 is integrated with the hoisting lever (not shown),
The hoisting ratchet wheel 2 has notches 2a at positions corresponding to both ends of the hoisting angle. The gear 3 is coaxially connected to the gear 4 by a well-known clutch, and transmits only the rotation of the hoisting gear 1 in one direction (counterclockwise) to the gear 4. The hoisting fork gear 5 is coaxially connected to a hoisting fork 6 that engages with a patrone shaft (not shown) and a fork ratchet wheel 7, and is connected by a well-known friction spring using an expandable friction spring (not shown). The detection lever 8 is rotatably supported around a shaft 9 on the film supply side (left side in the figure) near the film transport path with respect to the aperture (not shown), and has a detection pin 10 at one end, and a detection pin 10 at one end. An interlocking lever 11 is rotatably supported at the end by a shaft 12, and is biased clockwise by a spring 13. The interlocking lever 11 is slidably supported by a guide pin 14, and has an interlocking lever pin 1 at the other end.
5, the interlocking lever pin 15 has a control lever 1
8 turning area. The film holder 16 is fixed to the rear cover of the camera (not shown), and receives the film 17 having a free rear end 17a from the rear and presses the film 17 against the detection pin 10 to move the detection lever 8 and the interlocking lever 11. Regulate location. The control lever 18 is rotatably supported on the camera body and has a tongue portion 18a, and is biased counterclockwise by a spring 19 having a weaker force than the spring 13 of the detection lever 8. Rotation is restricted by the position of the lever pin 15. The index plate 20 has a notch 20a into which the tongue portion 18a of the control lever 18 can fit, and is integrated with a coaxial index plate gear 21 and rotatably supported by the camera body. The sprocket gear 22 is integrated with a well-known sprocket 23, and the index plate gear 2
1, and the gear ratio of the two is set so that the index plate 20 rotates once when the film is wound one frame. The ratchet pawl 24 has a pawl portion 24a at one end, and a vertically bent portion 24b at the other end within the operating range of the control lever 18, and is biased clockwise by a spring 25 and pivotably supported on the camera body. However, control lever 1 is always
Rotation is restricted by contacting one end of the vertically bent portion 24b with the vertically bent portion 24b. The release limiting plate A26, which is rotatably supported by a shaft, can rotate up to the small diameter part of the step of the stepped shutter release button 27, and the release limiting plate B ( (not shown) cooperates with each other to regulate the vertical movement of the shutter release button 27.

In the above embodiment, the rotation of the release limiting plate A26 is prevented by changing the position of the control lever 18, thereby making it impossible to press the shutter release button 27 mechanically. In the case of a camera, a switch is provided in the pivot area of the lever 18, and a tongue portion 18a of the control lever 18 is provided.
When the switch enters the notch 20a of the index plate 20, the switch is activated by one end of the control lever 18.
It may be configured such that the shutter is not electrically released by turning ON or OFF.

The release limiting plate A26 has a limiting pin 28 at one end that abuts the control lever 18, and the other end is a seesaw lever that is rotatably supported coaxially with the indexing plate 20 and the indexing plate gear 21. It extends into the operating range of 29. The anti-reversal lever 30 has a spring 31
It is biased counterclockwise and pivoted on the camera body for free rotation, with one end extending into the operating range of the hoisting gear stopper 32, and the other end extending into the operating range of the seesaw lever 2.
9, and its rotational movement is regulated by the position of the release limiting plate A26 via the seesaw lever 29. The hoisting gear stopper 32 is located in the notch 2a of the hoisting ratchet wheel 2 described above.
A well-known reversing stopper is biased by a self-returning spring (not shown) so as to reverse at one end 32a
controls the rotation and rotation direction of a hoisting lever (not shown) integrated with the hoisting ratchet wheel 2, and the other end 32b is locked by the position of the reversal prevention lever 30 to restrict reversing operation. be done. The reset lever 33 is interlocked with the shutter mechanism, and when the shutter mechanism returns after the shutter is operated, the control lever 18 is actuated clockwise against the spring 19, and the tongue portion 18a of the control lever 18 and the above-mentioned index The plate 20 is disengaged from the notch 20a, and the disengaged state is maintained until the tongue portion 18a rotates to a position where it cannot enter the notch 20a due to the next winding, and thereafter. is retracted out of the operating range of the control lever 18.

Next, the operation of the above embodiment will be explained.

When the film 17 has a sufficient length for photographing, that is, when the rear end 17a of the film after winding is located on the film supply side from the film holder 16, it is ready for winding as shown in FIG. By the hoisting operation of the hoisting lever (not shown), the gear 3 meshed with the hoisting gear 1 integrated with the hoisting lever, and the gear 3
The gear 4, which is clutched coaxially with the film, rotates, and the rotational force causes the winding fork gear 5 and the winding fork 6, which is frictionally connected to the winding fork gear 5, to rotate counterclockwise, thereby winding the film. Sprocket gear 2 integrated with well-known sprocket 23 by movement of film 17
2 rotates, and the index plate 20, which is integral with the index plate gear 21 engaged therewith, rotates clockwise. When the film is wound up by one frame, the tongue portion 1 of the control lever 18
8a enters the notch 20a of the index plate 20,
The control lever 18 turns to the left. At the same time, the restriction on rotation of the ratchet pawl 24 is released, and when the ratchet pawl 24 is rotated clockwise by the force of the spring 25 and the pawl portion 24a locks the fork ratchet wheel 7, the hoisting fork 6 is frictionally coupled to the hoisting fork gear 5. Unraveled,
Even if a subsequent hoisting operation is performed, the fork gear 5
The winding fork 6 stops rotating, and winding of the film is completed. Also, release limit plate A
At the same time as the control lever 18 is turned to the left, the counterclockwise rotation of the lever 26 is released and becomes free to rotate. The seesaw lever 29 is also free to rotate clockwise, and the reversal prevention lever 30 is similarly free to rotate counterclockwise, but its rotation is restricted by the end 32a of the hoisting gear stopper 32. Next, charging of the shutter mechanism (not shown) is completed, and immediately after that, the notch 2a of the hoisting ratchet wheel 2 integrated with the hoisting lever (not shown) reaches the reversible position of the hoisting gear stopper 32, and the notch 2a of the hoisting gear stopper 32 (not shown) The winding lever can be restored. The hoisting gear stopper 32 is reversed by the restoring operation of the hoisting lever (not shown), and the rotation prevention lever 30 is released from the above-mentioned rotational restriction and rotated counterclockwise by the force of the spring 31, causing the seesaw lever 29 to rotate. The release restriction plate A26 is rotated counterclockwise through the shutter release button 27, thereby releasing the restriction on the up and down movement of the shutter release button 27 in one direction. At the same time, the end portion 32a of the hoisting gear stopper 32 is locked to prevent the reversal operation before shutter release, thereby preventing double hoisting operation of the hoisting lever (not shown).
When the winding lever fully returns, the release restriction plate B (not shown) linked to it releases the remaining restriction on the vertical movement of the shutter release button 27, completing the winding operation and leaving the camera ready for shooting (see FIG. 2). becomes.

Next, by pressing down the shutter release button 27, the shutter mechanism (not shown) is unlocked and an exposure operation is performed. After the exposure operation is completed, the control lever 18 is reset by the interlocking operation of the reset lever 33, and the control lever 18 is brought into the pre-winding state (FIG. 1).

Next, if the length of the film 17 is not long enough to be used for photography, in other words, the rear end 17 of the film
The case where a passes through the film holder 16 section will be explained. When the winding lever (not shown) is used to wind the film in the same way as in the previous case, the film is
The rear end 17a of the film passes the position of the detection pin 10 before the film is wound up by the frame, and the detection lever 8 is rotated clockwise by the force of the spring 13 due to the resistance exerted on the detection pin 10 by the film 17, and is connected. The interlocking lever 11 moves to the left in the figure, and the interlocking pin 15 fixed to the interlocking lever 11 moves to the left in the figure.
comes into contact with the control lever 18 and prevents the control lever 18 from rotating counterclockwise (the state shown in FIG. 3).
Therefore, from then on, the film is wound up, and when the film is wound up by one frame, the notch 20a of the indexing plate 20 touches the tongue portion 1 of the control lever 18, as described above.
Even if the control lever 18 is rotated to a position where it can be inserted, the control lever 18 is prevented from rotating counterclockwise, and the interlocking release restriction plate A26 does not release the restriction on the vertical movement of the shutter release button 27, so that the shutter is not released. Further, since the rotation of the reversal prevention lever 30 is restricted by the seesaw lever 29, the hoisting gear stopper 32 can be reversed.
A hoisting lever (not shown) can be hoisted up again. On the other hand, the ratchet pawl 24 is connected to the control lever 1.
8, the clockwise rotation remains restricted, so the fork ratchet wheel 7 is not locked, and the hoisting fork gear 5 and the hoisting fork 6 are integrally connected by friction, and the hoisting Film 1 is lifted by rewinding the lever (not shown).
7 can be wound up until the rear end portion 17a is wound up into a cartridge (not shown).

As described above with respect to the embodiments, according to the present invention, after the rear end portion 17a of the film passes the detection lever 8 and is wound up, the shutter release is not allowed and further winding is possible. This has an excellent effect of preventing screen cut-off or fogging of the last frame, which was a drawback of the conventional method.

[Brief explanation of the drawing]

Figure 1 shows the state before winding when the film is long enough for photography, Figure 2 shows the completed winding state in the same case as Figure 1, and Figure 3 shows the rear end of the film. FIG. 4 is a plan view of the embodiment of the present invention showing the state after winding up after passing through the detection section. DESCRIPTION OF SYMBOLS 1... Winding gear, 8... Detection lever (film trailing end detection means), 10... Detection pin, 11... Interlocking lever (winding amount restriction release means), 17... Film, 17a... Film Rear end, 18... Control lever (film winding amount regulating means), 20... Index plate (film winding interlocking member), 20a... Notch (engaging part), 24... Ratchet claw, 26 …
...Release restriction plate A (shutter release regulating means), 27...Shutter release button, 29...
Seesaw lever, 30... Reversal prevention lever, 32
... Winding stopper, 33 ... Reset lever.

Claims (1)

[Scope of Claim for Utility Model Registration] In a self-winding type camera using a double cartridge, a film winding interlocking member having an engaging portion that interlocks with a film winding means, and a position where the film has been wound for one frame. a film winding amount regulating means that engages with an engaging portion of the film winding interlocking member to make the film winding interlocking member immovable and regulating the film winding amount to one frame; A shutter that is interlocked with the engagement operation of the film winding amount regulating means and restricts movement of the shutter release button so that the shutter release button cannot be operated when the film winding amount regulating means is not engaged with the engaging portion of the film winding interlocking member. a tar release regulating means; a film rear end detecting means provided on the film feeding side of the cartridge and moving as the rear end of the film passes; and a film rear end detecting means interlocked with movement of the film rear end detecting means as the rear end of the film passes. A film winding device for a camera, comprising: a winding amount restriction release means for restricting the winding amount regulating means to be inoperable.