JPH0430136A - Film easy loading camera - Google Patents

Abstract

PURPOSE:To load a film just by dropping a film cartridge by providing an opening for loading the film and an closing cover on one surface of a camera main body and making a film pressure plate movable so that a film leader part is easily introduced. CONSTITUTION:When a slide button 8 is operated in a state where a cover 5 is closed, the cover 5 opens the opening parts 3a and 3b for inserting the cartridge 2 and the film leader part 4. While the cover 5 opening position, the film pressure plate 15 turns with a pressure plate receiving surface 16 on a lower side as a fulcrum. In the case of loading the cartridge 2 form the open ing part 3b, the film leader part 4 also passes through the opening part 3a and is surely inserted between the pressure plate 15 and an exposing frame 11. By pressing the cover 5 in a closing direction, the pressure plate 15 is returned to the exposing frame 11 side and it is moved to a photographing position abutting on the surface 16 when the cover 5 is locked in the camera main body 1. Furthermore, a film feeding mechanism is actuated when the cover 5 is locked at a closing position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a camera using the currently used 35 mm cartridge film.

[Conventional technology]

A part of the leader of the 35mm film cartridge is drawn out long in advance. Therefore, in current cameras that use such cartridge films, the camera body is provided with a large opening/closing lid in order to insert the film cartridge and film leader into the camera body when loading the film.

In order to make the film loading operation easier for such cameras, the present applicant has put into practical use a drop-in loading (DIL) method.

In this DIL method, by slightly opening the back cover of the camera, an opening is created in the bottom of the camera body for inserting the film cartridge from the axial direction, and a slit for entering the film leader section from one side edge. form,
When loading the film cartridge from the axial direction, the film leader section is also designed to fit into a predetermined position within the camera body. Therefore, when loading the film, the film can be loaded reliably without having to pay special attention to the resistance of the film pressure plate, exposure frame, etc. to the film leader section.

[Problem to be solved by the invention]

Even with a DIL-type simple loading camera with improved film loading, the camera still needs an opening to load the long drawn-out film leader, and the camera has a structure that leaves the bottom and back of the camera wide open. It has become.

This makes it easier for dirt and foreign matter to enter the interior, and
The light-shielding structure of the opening becomes complicated, which is one reason why it is difficult to miniaturize the camera.

Furthermore, when the back cover is opened, the internal mechanisms on the back side of the camera body are easily visible, which can be confusing, especially for beginners, when loading film.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned problems and provide a simple film loading camera in which the number of open parts of the camera itself is greatly reduced.

[Means to solve the problem]

In order to achieve the above object, in the first aspect of the present invention, the camera body is provided with an opening into which the film cartridge from which the film leader section has been pulled out is inserted from the axial direction, and an opening/closing lid for opening and closing this opening. At the same time, the film pressure plate is interlocked with the opening/closing lid, so that when the opening/closing lid is opened, the film pressure plate is separated from the exposure frame, and when the lid is closed, the film pressure plate is pressed against the exposure frame.

Further, in the second invention, an opening similar to the first invention is provided in the camera body, and cartridge insertion detection means is provided which is displaced when a film cartridge is inserted into the opening, and the displacement of the cartridge insertion detection means is In response to this, the film pressure plate is pressed toward or released from the exposure frame.

[Effect]

In the first invention, when the film cartridge is inserted into the opening from the axial direction, by opening the opening/closing lid, the film pressure plate is retracted from the position where it is pressed against the exposure frame, and the film leader section to be loaded is exposed. Insert a receiver between the frame and the frame. When you insert the film cartridge and close the opening/closing lid,
The film pressure plate is now pressed against the exposure frame, and the film leader portion is brought into close contact with the exposure frame, completing the loading of the film.

In the second invention, the film pressure plate retreats from the exposure frame during the process of inserting the film cartridge into the opening from the axial direction, and when the film cartridge insertion is completed, the film pressure plate is pressed against the exposure frame. .

Hereinafter, the present invention will be explained in detail based on the illustrated embodiments.

〔Example〕

In FIG. 1, which shows a camera using the present invention from the bottom side, an opening 3 is formed in the bottom of the camera body l, and a cartridge 2 is loaded into this opening 3 from the axial direction. The opening 3 receives the film leader section 4 that has been gently pulled out from the cartridge 2.
a, and an opening 3b into which the cartridge 2 is inserted. This opening 3 is covered by an M5 attached to the bottom of the main body.

M5 is mounted on a shaft 6 provided parallel to the film feeding direction, and is biased in the opening direction by springs 6a (FIG. 2). The lid 5 is provided with a claw 7, and when the lid 5 is closed, the claw 7 engages with the camera body 1 and is locked in the closed position. Further, the camera body 1 can be opened by operating a slide button 8 provided on the side surface of the camera body 1.

2 and 3 schematically show the A-A cross section in FIG. 1, and FIG. 2 shows the lid 5 in a closed state and FIG. 3 shows the lid 5 in an open state. .

A shutter 10 is provided behind the photographic lens 9, and a film 12 positioned in an exposure frame 11 is exposed by opening and closing the shutter 10. A film pressure plate 15 is provided behind the exposure frame 11. Film pressure plate 15
is biased toward the exposure frame 11 by a pressure plate spring 13 interposed between the front wall 14 and the front wall 14 . In the photographing state, the pressure plate holder is pressed against the surface 16 and holds the film 4 between it and the exposure frame 11.

A tongue piece 15a bent forward is formed at the end of the film pressure plate 15 on the side closer to the opening 3, and
An L-shaped pressing piece 15b is fixed to the back side. When the tongue piece 15a is closed, the pressure holder fits into a light-shielding groove 16a provided along the green side of the surface 16.

The shaft 6 to which the lid 5 is attached is located inside the pressing piece 15b, and the pressing piece 15b abuts against a curved portion 5a formed integrally with the lid 5 under the bias of a pressure plate spring 13. When the lid 5 moves to the open position shown in FIG. 3 by the bias of the spring, the pressing portion 15b is pushed rearward by the curved portion 5a. For this reason, li5
The biasing force of the spring that biases the opening direction is the pressure plate spring 13.
is set larger than the urging force of. A light-shielding sheet 17, such as a bellows, is attached between the back surface of the pressing portion 15b and the back wall 14 to prevent light from the opening 3 from entering the camera body 1. Further, as shown in FIG. 3, the outer side of the light shielding groove 16a facing the opening 3a is a rounded guide surface, and when the film leader section 4 is inserted from above in the figure, the edge of the light shielding groove 16a is rounded. is smoothly introduced into the camera body 1.

The effect of the above configuration will be explained.

To load a film, when the slide button 8 is operated with the M5 closed as shown in Figure 2, the lock against the claw 7 is released and the M5 is biased by the spring 6a as shown in Figure 3. The openings 3a and 3b for inserting the cartridge 2 and the film leader section 4 are opened. While the lid 5 is moving to the open position, the curved portion 5
The pressing piece 15b is pushed toward the back side by the button a. As a result, as shown in FIG. 3, the film pressure plate 15 rotates against the bias of the pressure plate spring 13, with the pressure support on the lower side in the figure using the surface 16 as a fulcrum.

By retracting the film pressure plate 15 to a position away from the exposure frame 11 in this manner, when loading the cartridge 2 from the opening 3b, the film leader section 4 also passes through the opening 3a, and the space between the film pressure plate 15 and the exposure frame 11 is will be inserted reliably. Note that since the film pressure plate 15 is inclined so that the distance from the exposure frame 11 becomes wider on the opening 3 side, the film pressure plate 15 itself functions as an insertion guide for the film leader section 4.

After that, when the lid 5 is pushed in the closing direction, the film pressure plate 15 is returned to the exposure frame 11 side by the bias of the pressure plate spring 13, and when the claw 7 of the lid 5 is locked to the camera body 1, The film pressure plate 15 is moved to the photographing position where the pressure plate holder is in contact with the surface 16 as shown in FIG. Furthermore, once the lid 5 is locked in the closed position, a known film feeding mechanism is activated to begin transporting the film. Then, the first frame is sent behind the exposure frame 11 (then the film feeding is stopped and a shadow standby state is entered).

FIG. 4 schematically shows another embodiment of the present invention, in which the same reference numerals are given to the same members as in the previously described embodiment, and the illustration of the rear wall 14 is omitted.

In this embodiment, an opening/closing mechanism for opening and closing the M5 is used to tilt the film pressure plate 15 so that the film leader section 4 can be easily inserted when the M5 is opened.

In FIG. 4, the film pressure Fi 15 biased by the pressure plate spring 13 is hinged to the camera body 1 at the lower end in the figure, and is rotatable with the upper end in the figure as a free end.

A slide plate 21 is integrally fixed to the slide button 8 and is biased upward by a spring 21a.The slide plate 21 is provided with an arm 23, the tip of which extends through a notch formed on the side surface of the camera body 1. Street, film pressure plate 15
It engages with an inclined surface 15c integrally formed on one side of the. As shown in the figure, the inclined surface 15c is inclined so that the side closer to the opening 3 is away from the exposure frame 11.

When the lid 5 is open, the slide plate 21 abuts one end of the stop lever 24 and is held in the illustrated position. The stop lever 24 is rotatable via a shaft 24a,
The other end protrudes from the bottom of the camera body 1. and,
When the lid 5 is closed, the lid 5 is rotated clockwise against the bias of the spring 25 by the pressure of the protrusion 5c formed on the lid 5. A pin 26 is further implanted in the slide plate 21, and a long hole 27a provided at one end of the locking lever 27
is engaged in. The locking lever 27 is fixed by a shaft 27a, and a locking pawl 28 for locking the pawl 7 of the lid 5 is provided at the other end.

In the illustrated state, the slide plate 21 is at the lowest position, and the film pressure plate 15 is tilted by the arm 23 against the pressure plate spring 13.

Therefore, a gap is formed between the exposure frame 11 and the exposure frame 11. When the cartridge 2 with the film leader section 4 pulled out is loaded in this state, the film leader section 4 is moved to the inclined film pressure plate 15 as in the above-described embodiment.
is inserted between the exposure frame 11 and the exposure frame 11.

After this insertion operation, when the lid 5 is closed, the stop lever 24 is pushed by the protrusion 5c, and the stop lever 24
rotates clockwise. Then, when I5 is moved to the closed position, when one end of the stop lever 24 comes off the upper edge of the slide plate 21, the slide plate 21 is moved by the spring 2.
It rises due to the bias of 1a. When the arm 23 rises together with the slide plate 21, the film pressure plate 15, which had been tilted by the arm 23 and the inclined surface 15c, is pressed toward the exposure frame 11, and the film leader section 14 is moved toward the exposure frame 1.
Position between 1 and 1.

The slide plate 21 is further raised by the pin 26. Long hole 27b
The locking lever 27 is rotated clockwise through the . Then, the lock pawl 28 of the locking lever 27 locks the pawl 7 of the lid 5, and the lid 5 is locked in the closed position. 15 is locked, the film is fed and the first frame is automatically set in the exposure frame 11.

When opening the lid 5, the slide button 8 is pushed down and the slide plate 21 is slid downward against the spring 21a. As a result, the arm 23 comes to push the inclined surface 15c, and the film pressure plate 15 is separated from the exposure frame 11 while being inclined so as to open the opening 3 side. At the same time, the locking lever 27 is rotated counterclockwise via the pin 26° elongated hole 27b. When the slide plate 21 reaches the lowest position, the lock pawl 28 releases the lock from the pawl 7, and the lid 5 is opened by the force of the spring.

When the lid 5 is opened, the stop lever 24 rotates counterclockwise under the bias of the spring 25, rotates to the position shown in FIG. come into contact with Therefore, after that, even if you release your finger from the slide button 8, the slide plate 21 will not rise.
The camera is now ready to load film.

FIGS. 5 and 6 show essential parts of still another embodiment of the present invention. In this embodiment, the film pressure plate 15 is moved in conjunction with the insertion operation of the cartridge 2. As in the embodiment shown in FIG. 4, the film pressure plate 15 is hinged at its lower end in the figure, and is rotatable with the side closer to the film pressure plate 15 as a free end. As shown in FIG. 5, a dendrite 15d having a raised end is fixed to one side edge of the film pressure plate 15. As shown in FIG.

The slope 31a at the tip of the arm 31, which enters from the side surface of the camera body l, is engaged with the dendrite 15d. This slope 31a has an inclination corresponding to the inclination of the dendrite 15d. In the illustrated position, the film pressure plate 15
is tilted, but when the arm 31 is moved leftward from the illustrated position by the bias of the spring 32, the film pressure plate 15 is moved toward the exposure frame 11 by the bias of the pressure plate spring 13.

A pin 33 is implanted at the other end of the arm 31, and projects into the cartridge loading chamber 35 from a through hole 34 formed in the side surface of the camera body 1, as shown in FIG. The pin 33 has a slope in the direction in which the cartridge 2 is loaded, and when the cartridge 2 is loaded, the pin 33
It is moved in the direction of escaping from the cartridge loading chamber 35 in response to the pressure of a. At the same time, the arm 31 is also moved to the right against the bias of the spring 32.

The through hole 34 is provided near the opening side of the cartridge loading chamber 35, and when the cartridge 2 is inserted to the normal loading position, the pin 33 comes off from the body portion 2a, and the spring 32 is biased. It moves to the left together with the arm 31. Note that the reference numeral 35a indicates a spring for patronage ejection.

A locking lever 37 integrated with the slide button 8 is further attached to the side surface of the camera body 1. This locking lever 37 is movable in the front-rear direction of the camera body 1, and is biased forward by a spring 38. The locking lever 37 has an inclined protrusion 39. A lock pawl 40 is provided. Then, press the slide button 8 with the spring 38.
When the arm 31 is moved backward against the force, the inclined protrusion 39 enters the lower end of the arm 31 and moves the arm 31 to the right.

The upper end of the lock pawl 40 is sloped.

As a result, when the upper end of the lock pawl 40 is pushed by the pawl 7 as the lid 5 is being closed, the locking lever 39 once moves backward against the spring 38, and the pawl 7 further descends and locks. When it gets over the upper end of the pawl 40, it moves forward again and locks M5 in the closed position.

According to the above, the cartridge 2 is stored in the cartridge loading chamber 35.
When attempting to load the cartridge, the pin 33 is first pushed by the body portion 2a of the cartridge 2, and the arm 31 is moved to the right as shown in FIGS. 5 and 6. Arm 31
When it moves to the right, the slope 31a formed at its tip pushes against the dendrite 15d. As a result, the film pressure plate 15 resists the pressure plate spring 13, and the upper end side in the figure is opened to form a gap with the exposure frame 11. therefore,
Similar to the embodiments described so far, when loading the cartridge 2, the entrance path of the film leader section 4 is secured, so that reliable film loading can be performed.

When the cartridge 2 is inserted to the proper position, the cartridge body 2a passes through the through hole 34, and a rewinding fork 40 engages with a keyway at one end of the spool 2b. Therefore, the pin 33 that had been pressed against the body portion 2a until then is pushed into the cartridge loading chamber 3 by the bias of the spring 32.
5, and the arm 31 moves to the left along with this.

When the arm 31 moves to the left in this way, the slope 31a,
Due to the relationship with the dendrites 15d, the film pressure plate 15 moves toward the exposure frame 11 under the bias of the pressure plate spring 13, and the pressure plate holder is positioned at the photographing position in contact with the surface. In this state, the pin 33 determines whether or not to remove the cartridge 2, so that the cartridge 2 is held at the normal insertion position 1 against the bias of the spring 35a.

After loading the cartridge 2, when the I5 is closed, the lock pawl 40 locks the pawl 7 and the lid 5 is locked in the closed position. Then, the first frame of the film is fed to the exposure frame 11, and the camera enters a photography standby state.

When opening the lid 5, slide the slide button 8 toward the back. As a result, the lock pawl 40 is released from the pawl 7, and the lid 5 is opened by the force of the spring. Further, since the locking lever 37 moves backward with the movement of the slide button 8, the arm 31 is lifted by the slope 39, and as a result, the arm 31
moves to the right. At the same time, the pin 33 is pulled out from the cartridge loading chamber 35.

When the pin 33 is removed from the cartridge loading chamber 35, the cartridge 2 is pumped from the opening 3b by the bias of the ejecting spring 35a.

Therefore, the used cartridge 2 can be easily taken out. Further, after the cartridge 2 is popped up, the operation of the slide button 8 may be released. After taking out the cartridge 2, the bottle 33 protrudes into the cartridge loading chamber 35 again, and the film pressure plate 15 is also pressed toward the exposure frame 11.
When loading the film, the film pressure plate 15 can be released from the exposure frame 11 according to the action already described.

〔Effect of the invention〕

As described in detail above, according to the film simple loading camera of the present invention, an opening for loading film and an opening/closing lid are provided on one side of the camera body, and the film pressure plate is movable so as to easily introduce the film leader section. This makes it possible to simplify the appearance by reducing the number of open parts on the camera body, and it becomes possible to load the film cartridge by simply dropping it in. Furthermore, the present invention eliminates the need for a light-shielding structure between the bottom of the back cover and the bottom of the camera body in the current system where the back cover covers two sides, the back and the bottom, thereby simplifying and downsizing the camera structure. I can do it.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the present invention. FIG. 2 is a cross-sectional view of the main part taken along line AA in FIG. 1 with the lid closed. FIG. 3 is a cross-sectional view of the main part taken along line A-A in FIG. 1 with the lid open. FIG. 4 is a schematic diagram of main parts showing another embodiment of the present invention. FIG. 5 is a schematic diagram of main parts showing still another embodiment of the present invention. FIG. 6 is an explanatory diagram during the film cartridge insertion operation.・Patrone・Opening・Lid・Exposure frame・Press plate spring 5・・Film pressure plate 15b・・Press piece 15c・・Slanted surface 15d・・Steel protrusion 21・・Slide plate 23・・Arm 24・・・Stop lever 27・・・Locking lever 31... Arm 33... Pin 39... Locking lever Fig. 2

Claims (2)

[Claims] (1) A single opening provided in the camera body into which the film cartridge is inserted from the axial direction together with the pulled-out film leader section, an opening/closing lid that opens and closes the opening, and photography in which the film is pressed toward the exposure frame. a film pressure plate that is movable between a position and a retracted position away from the exposure frame, and an operation of opening the opening/closing lid moves the film pressing plate to the retracting position, and an operation of closing the opening/closing lid moves the film pressure plate to a photographing position. A simple film loading camera characterized by being equipped with an interlocking mechanism. (2) a single opening provided in the camera body into which the film cartridge is inserted from the axial direction together with the pulled-out film leader section, and cartridge insertion detection means that is displaced by inserting the film cartridge into the opening; A film pressing plate is movable between a shooting position where the film is pressed toward the exposure frame and a retracted position away from the exposure frame, and the film pressing plate is moved to the retracted position during insertion of the film cartridge in response to displacement of the cartridge detection means. and an interlocking mechanism for moving the film pressure plate to the photographing position when insertion of the film cartridge is completed.