JPS6289030A - Half size feeding device for 110 camera - Google Patents

Abstract

PURPOSE:To make half-size photographing possible with an inexpensive mechani cal device by providing a pair of detecting levers at a pitch of a half of perfora tion and stopping a winding mechanism every time when the levers are rotated fitting to the perforation of a film. CONSTITUTION:When a film F is fed in the direction of arrow mark, a pawl 15a at the tip of left side film detecting lever 15 enters the first perforation P. Then, the layer 15 is turned around a fixed pin 17 by the film F, and thereby, a linkage plate 19 is shifted to the right. A pressure coupling face 19a pushes a detection lever adjusting pin 21 and turns a releasing lever stopping plate 20 counterclockwise. Then, the coupling of a locking step part 20a and a locking pawl is released, and a winding releasing lever 25 is turned counterclockwise by force of a tension spring 29. Then, the lever 15 comes off from perforation P, and a winding lever 26 is turned clockwise, and its winding stopping arm 26b couples with a winding gear 28, and stops film winding. Thus, the photographing of the first frame becomes possible.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD The present invention relates to a camera using 110 film, and more particularly to a half-size feeding device that allows film feeding at half-size pitches.

"Prior Art and its Problems" As is well known, the 110 film has perforations with a pitch of 2511+m, and the screen recess of a typical 110 camera corresponds to this 25 mm. Also, the conventional 1
10 film had emulsion applied only to the area corresponding to the screen, and the middle part of the screen could not be photographed.

On the other hand, this 110 camera is also used as a special camera that is attached to the eyepiece of an endoscope to take images of the endoscope. The endoscopic image is imprinted. Figure 5 is 11
0 This shows the relationship between the perforation P of the film F, the full-size photographing screen G, and the endoscopic image Z.
is smaller than the photographing screen G, and is only captured in the center thereof. Therefore, if the entire surface of the film F is coated with emulsion, the endoscopic image Z can also be imprinted on the middle part of the photographic screen G as shown by the broken line. Based on this idea, 110 film exclusively for endoscopic photography, whose entire surface is coated with emulsion, was released.

In order to imprint the endoscopic image Z between the normal (full-size) shooting screen G using this emulsion-coated 110 film, the film advance pitch on the camera side must be half that of the full-size film. Therefore, a 110 camera exclusively for half-frame has already been put into practical use. However, in this conventional device, in order to set the film advance amount from the position of one perforation per frame on a full-size screen, a pair of optical sensors are arranged at half the pitch of the perforations, and the perforation detection signal from this optical sensor is The signal is processed through a signal processing circuit to operate the film transport mechanism. For this reason, the signal processing circuit in particular became complicated and expensive, and there were problems of light leakage and power consumption due to the optical sensor. The object of the present invention is to obtain a half-size device with 110 cameras that can be set up using a simple mechanical device.

"Summary of the Invention" The present invention has a film detection lever installed on the film feeding surface that can be inserted into the perforations of the 110 film.
A pair of film detection levers are arranged at half the pitch of the A perforation pitch, and the film winding stop mechanism is linked with the pair of film detection levers, so that each time the pair of film detection levers fits into the perforations of the film and the film is fed. Each of these features is characterized in that the film winding mechanism is stopped.

If one of the pair of film detection levers can be held at a position where it does not protrude into the film feeding surface by a full-size/half-size switching lever, full-size feeding becomes possible.

"Embodiments of the Invention" The present invention will be described below with reference to illustrated embodiments. FIG. 4 is a rear view of the llO camera of the present invention, in which a recess hole 14.1 is formed in the camera body 13 on the film feeding surface near the guide rail 12 above the full-size screen opening 11.
A pair of film detection levers 15 that can be protruded from 4 are provided.

The installation interval of the film detection lever 15 is determined by the pitch of the perforation P of the film F (see Figure 5, 25m).
+a) is set to 1/2 (12.5m+a), which is half of that. The tip claw portion 15a of this film detection lever 15
jf, can move forward and backward into perforation P of film F.

The rear end (lens side) of this pair of film detection levers 15
As shown in FIG. 1, an elongated hole 15b is formed in the elongated hole 15b, and a fixing pin 17 on a mechanism stand 16 fixed to the camera body 13 side is fitted into this elongated hole 15b. Therefore, when the film is detected and t<-15, it can move according to the elongated hole 15b, and its tip claw 15a is attached to the recessed hole 1.
4 and is movable within the length of the retraction hole 14.

The pair of film detection levers 15 are connected at their intermediate portions to the interlocking plate 19 by pivot dowels 18, and rotate together around the left and right fixing pins 17 at all times.

The interlocking plate 19 is provided with a suppressing engagement surface 19a that pushes the detection lever adjustment pin 21 provided upright on the release lever locking plate 20 from one side.

This release lever locking plate 20 is pivotally mounted on the mechanism stand 16 by a pivot pin 22. Also on the mechanism stand 16 are
Positioned on the left and right sides of the release lever locking plate 20, a winding 1F release lever 25 and a winding stop lever 26 are pivotally connected by pivot pins 23 and 24, respectively. The winding release lever 25 and the winding stop lever 26 are such that an interlocking bent portion 25a formed on one arm of the first winding release lever 25 fits into an interlocking groove 26a formed at the tip of one arm of the first winding stop lever 26. Waiting,
When the winding release lever 25 rotates clockwise (counterclockwise) in FIG. 1, the winding stop lever 26 swings counterclockwise (clockwise). Then, the winding is stopped with this winding release lever 25, and <-26 is the tension spring 29.
As a result, the winding release lever 25 is urged to rotate counterclockwise and the winding stop lever 26 is urged to rotate clockwise.

The winding release lever 25 and the winding stop lever 26 operate a film winding stop mechanism in conjunction with the winding operation of the shutter. Therefore, the interlocking arm 25 of the hoisting release lever 25
b can be engaged with a rear curtain pin 27 of a shutter (not shown), and two winding stop arms 26b of the winding lever 26 can be engaged with a winding gear 28 of a winding mechanism. It has become. When the shutter winding is completed, the trailing curtain pin 27 is moved to the first position.
As shown in the figure, when the shutter escapes to the left and does not engage with the interlocking arm 25b, and when the shutter completes its travel, it moves to the position shown by the chain line in FIGS. 1 and 3, pushes the interlocking arm 25b, and releases the tension spring 29.
Unwind it against the force of , and rotate 8-25 clockwise as shown in the figure.

On the side of the interlocking bent portion 25a of the hoisting release lever 25, there is also a locking pawl 25c that engages and disengages from the locking stepped portion 20a of the plate 20, and a pressing surface 19b of the interlocking plate 19. A pressing surface 25d for pressing is formed. When the shutter is set and the trailing bin 27 escapes from the interlocking arm 25b, the engaging 1F pawl 25c engages the engaging stepped portion 20 by the force of the tension spring 29.
a, and its counterclockwise rotation is restricted. Further, when the locking pawl 25c and the locking stepped portion 20a are disengaged and the winding release lever 25 is rotated counterclockwise, the pressing surface 25d pushes the pressing surface 19b of the interlocking plate 19 and presses the pair of film detection levers. 15 and retract this. That is, the tip claw portion 15a is retreated into the recessed hole 14.

A torsion coil spring 3 is attached to the fixing pin 17 on the left side of the figure.
0 is applied, and one leg 30a of this torsion coil spring 30 is attached to the release lever locking plate 20, and the other leg 30a is attached to the release lever locking plate 20.
0b, a spring hook installed on the interlocking plate 19 is hung on a pin 31. This torsion coil spring 30 rotates and urges the release lever locking plate 20 in the clockwise direction in the figure to hold the locking step portion 20a at the engagement position 8 with the locking pawl 25c of the winding release lever 25. At the same time, in a direction in which the pair of film detection levers 15 are projected from the recessed hole 14 via the interlocking plate 19,
Moreover, it is rotationally biased in the direction opposite to the film feeding direction.

Of the pair of film detection levers 15, a full size/half size switching lever 32 is provided on the left side of the detection lever 15 in the figure.

This full-size/half-size switching lever 32 pushes the interlocking arm 15C of the film detection lever 15 to
A is prevented from protruding from the recessed hole 14, and when the tip claw portion 15a does not protrude, full-size feed is performed, and when it can protrude, half-size feed is performed. This full-size/half-size switching lever 32 is operated by an operating lever outside or inside the camera.

The water bag configured as described above can be fed half size if it is in the state shown in FIGS. 1 and 2 in which the full size/half size switching lever 32 does not restrict the protrusion of the film detection lever 15 from the ejection hole 14. The shutter has now completed its travel, and the trailing curtain pin 27 is connected to the interlocking arm 25b of the winding release lever 25.
Think of a situation where you are running away from something. At this time, the locking pawl 25c is engaged with the release lever locking plate 20 and the stepped portion 20a. When the film F is loaded in this state, the distal end claw portion 15a of the film detection lever 15 protruding from the retraction hole 14 is pushed back by the film F due to the force of the torsion coil spring 30. As the film F advances in the direction of the arrow, the tip claw 15a of the film detection lever 15 on the left side of the figure eventually enters the first perforation P (Fig. 2). 15
The fixing pin 17 is fixed by the film F, which continues to be wound up.
As a result, the interlocking plate 19, which is pivotally connected to the film detection lever 15 by a pivot dowel 18, moves to the right in the figure. When the interlocking plate 19 moves to the right, its suppressing engagement surface 19a pushes the detection lever adjustment pin 21, and the pivot pin 2
When the release lever holder and the plate 20 are rotated counterclockwise around 2, the engagement between the locking step 20a and the locking pawl 25c is disengaged, and the hoisting release lever 25 is rebounded by the force of the tension spring 29. The film detection lever 15 rotates clockwise, its suppressing surface 25d pushes the interlocking plate 19, and is coupled to the interlocking plate 19.
is retreated from the appearance hole 14. Therefore, the film detection lever 15 is disengaged from the perforation P and returned to its initial state by the force of the torsion coil spring 30.

Furthermore, when the winding release lever 25 rotates counterclockwise, the winding stop lever 26 rotates clockwise as described above.
As shown in FIG. 3, the hoisting stop arm 26b is connected to the hoisting gear 2.
8 to stop film winding. Therefore, it becomes possible to photograph the negative frame.

When the shutter is released, the VK curtain bin 27 as shown in FIG.
3, and press the interlocking arm 25b to rotate the winding release lever 25 clockwise, so that the winding stop arm 26b of the winding stop lever 26 separates from the winding gear 28 and the film is wound. The above is possible again.

Next, the shutter is set (the rear curtain pin 27 is
5b), the tip claw portion 15a of the film detection lever 15 on the right side of the figure enters the first perforation P this time. Then, as the film F advances, this film detection lever 15
rotates around the fixing pin 17, and the interlocking plate 19, which is pivotally attached to the detection lever 15 by the pivot dowel 18, moves to the right in the figure, so that the suppression and retention surface 19a aligns with the detection lever adjustment pin 21. The following operation is exactly the same as when the left film detection lever 15 enters the perforation P and rotates. Therefore, film winding is stopped twice per perforation P. Since the pair of film detection levers 15 are arranged at the pitch of the perforations P, that is, half the pitch of the full-size screen, half-size feeding is performed.

Next, in order to carry out full-size feeding, the film detection lever 15 on the left side of the figure is held in the retracted position by the full-size/half-size switching lever 32, as shown by the chain line in FIG. Then, only the film detection lever 15 on the right side in FIG. 1 performs the above operation, so that the winding of the film is stopped once per perforation P. Therefore, full-size feeding can be performed.

In the above explanation, the screen opening 11 itself is assumed to be full size, and as a special case for endoscopic imaging, a half-size screen can be photographed on this full-size screen. The present invention can also be applied to a general 110 camera if its size can be switched between full size and half size.

"Effects of the Invention" As described above, the 110 camera of the present invention is provided with a pair of film detection levers that fit into the perforations of the 110 film at a pitch that is half the pitch of the perforations. Each time the film is rotated by the film, the film winding mechanism is stopped, so the pitch is half that of the perforation.
In other words, it is possible to stop the film advance every half size and take pictures. Therefore, half-size photography of 110 film is possible with only an inexpensive mechanical configuration without requiring a pair of optical sensors or their signal processing circuits, making it possible to perform half-size photography with 110 film, especially for endoscopy using emulsion-coated 110 film. A 110 camera for mirror photography can be provided at low cost.

[Brief explanation of drawings]

Figures 1 to 4 show an embodiment of the half-size feed device for a 110 camera according to the present invention, in which Figure 1 is a cross-sectional view of a state in which no film is loaded and the shutter has been set, and Figure 2 is a cross-sectional view of the same film. Figure 3 is a cross-sectional view of the main part with the film loaded and one film detection lever has entered the film perforation, Figure 3 is a cross-sectional view of the main part with the film winding operation stopped, and Figure 4 is a pair of 5 is a rear view of the camera showing the arrangement position of the film detection lever, and FIG. 5 is a top view showing the relationship between the screen, perforations, and endoscopic image of 110 film. 11...Screen opening, 12...Guide rail, 13.
...Camera body, 14...Emerging hole, 15...Film detection lever, 15a...Tip claw part, 15b...
Long hole 16...Mechanism stand, 17...Fixed bin, I8...
- Pivot dowel, 19... Interlocking plate, 20... Release lever locking plate, 20a... Locking step, 21... Detection lever adjustment pin, 22.23.24... Pivoting Bottle, 25...
・Hoisting release lever, 25a... interlocking bending part, 25b・
... Interlocking arm, 25c... Connection 1): Claw, 25d... Pressing surface, 26... Winding stop lever, 26a... Interlocking groove, 2
6b... Winding stop arm, 27... Rear curtain pin, 28...
- Winding gear, 29... tension spring, 30... torsion coil spring, 32... full size half size switching lever. Patent Applicant: Asahi Optical Industry Co., Ltd. Agents: Kunio Miura and Matsui, Figure 1, Figure 2, Figure 3

Claims (2)

[Claims] (1) In a camera using 110 film having one perforation per screen, a pair of film detection levers that can be fitted into the perforations are arranged on the film feeding surface at a pitch half the perforation pitch. A pair of film detection levers and a film winding stop mechanism are linked to each other so that each time the pair of film detection levers is fitted into a perforation of the film and the film is fed, the film winding mechanism is stopped. 110 characterized by
Camera half size feeder. (2) In claim 1, one of the pair of film detection levers is a half-size feeding device for a 110 camera that can be held at a position where it does not protrude from the film feeding surface by a full-size/half-size switching lever. .