JPH0231369B2 - FUIRUMUATSUBANKAIRYOGATAKANISOTENKAMERA - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a camera, and more particularly to a 35m/m
This invention relates to a simple loading camera that has been improved to facilitate the loading of size film cartridges.In particular, the cartridge is loaded in the axial direction, and a film pressure plate guides the film leader to the correct position when loading the cartridge. This relates to a simple loading camera that functions as a camera.

In the present invention, when the cartridge is loaded into the cartridge loading chamber in the longitudinal direction, the film leader pulled out from the cartridge is set in the feeding position along the back surface of the camera body by the action of the film leader guide member. It is preferable to implement this method in the camera described in Japanese Patent Application No. 55-186577. The above-mentioned camera is provided with a known film feeding means that engages with the perforation of the film leader set in the feeding attitude, and further includes a film winding shaft and a known automatic film winding mechanism in the winding chamber. If this is provided, when the film winding operation is performed after loading the cartridge, the film will be fed in the correct orientation and automatically wound around the film winding shaft. In such a camera, the cartridge is loaded along its axial direction, so the film leader is moved in the width direction of the leader itself when loading the cartridge. Therefore, when the film leader is loaded from outside the camera to a position facing the exposure aperture,
Its side edges tend to get caught on parts near the exposure opening, such as a film pressure plate. In view of the above circumstances, the present applicant proposed in Japanese Patent Application No. 55-186575 a simple loading camera in which the film leader is smoothly moved when loading and unloading a cartridge. However, even in the camera of this patent application No. 55-186575, when loading the cartridge, a step occurs between the film pressure plate facing the back of the film and the film leader guide member, so the film leader gets caught on this step. It tends to be.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a simple loading camera in which a film leader can be moved extremely smoothly when loading and unloading a cartridge.

The simple loading camera of the present invention has a cartridge loading chamber which is disposed on one side of the exposure opening of the camera body and has a shape that allows a cartridge with a slightly protruding film leader to be inserted along its axial direction. , a guide means for guiding the film leader to a film feeding path provided between an exposure opening and a pressure plate located on the back side of the opening as the cartridge is dropped into the cartridge loading chamber; In a camera having an engaging means that feeds the film by engaging with a feed hole, the film leader guide means includes an inner guide member on the camera body side and a support member supported on the camera body at a distance from the inner guide member. and an outer guide member, on which the pressure plate is elastically supported so as to be movable between an operating position close to the exposure aperture and a rest position farther away from the operating position. The pressure plate is configured to form a guide surface that is substantially flush with the outer guide member when in the rest position, and a pressure plate pressing member is formed in a portion of the back cover corresponding to the pressure plate, so that the pressure plate When the lid is opened, the pressing action of the pressure plate is released and the pressure plate functions as an outer guide surface, and when the back cover is closed, the pressure plate is pressed and biased, and the pressure displacement of this pressure plate causes the above-mentioned This is a simple loading camera with an improved film pressure plate, characterized in that the film feeding hole and the engaging means can be engaged with each other.

In the film pressure plate improved simple loading camera of the present invention having the above structure, the film pressure plate functions as a normal film pressure plate when the camera is in use, and when the back cover is opened to load or remove the cartridge, the film pressure plate functions as a normal film pressure plate. Since the film leader can be smoothly moved in alignment with the leader guide member, loading and unloading of cartridges can be easily performed.

Furthermore, in the above structure, the film feed hole and the film feeding engagement means can be engaged by the pressing displacement of the pressure plate when the back cover is closed, so a special operation is required for this engagement after loading the film. There is no need to do this, and the film can be fed immediately by simply closing the back cover.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view showing a film pressure plate improved type simple loading camera 1 according to an embodiment of the present invention, viewed from the bottom side of the camera with the back cover open, and FIG. 2 shows the same simple loading camera 1. The camera is partially cut away to show the back of the camera body near the exposure opening in detail. In Figure 1, the symbol P
shows a conventional 35m/m size cartridge loaded into the camera 1. This patrone P
is the cylindrical cartridge body P ₁ , the cartridge shaft
P ₂ , and a film outlet P ₃ slightly protruding tangentially or approximately tangentially from the cartridge main body P ₁ . From the drawer _P3 of Patrone P,
The film leader F is drawn out in advance by a predetermined amount (which varies depending on the film manufacturer). camera 1
The camera body 2 includes a lens L, a camera body 2 equipped with a central mechanism of the camera, and a back cover 4 which is pivoted near the top surface of the camera body 2 by a hinge 3 so as to be openable and closable in the direction of arrow A. camera body 2
A cartridge loading chamber 5 having a generally cylindrical space is provided on the right side in the figure, that is, at a position on the photographer's left hand side when the camera 1 is supported in a shooting posture. This cartridge loading chamber 5 is open to the bottom surface 6 of the camera body 2. Further, its circumferential surface is not completely closed, and a slit 8 is provided that is open toward the rear surface of the camera body 2 in 7 directions. An exposure opening 9 is provided on the back surface 7 of the camera body 2, and a winding chamber 10 is formed on the opposite side of the exposure opening 9 from the cartridge loading chamber. Inside the winding chamber 10 is a film winding shaft 1 equipped with a known automatic film winding mechanism (not shown).
1 is provided. Further, a fixed blade 12 extending over the entire height of the winding chamber 10 is provided at a position covering the winding chamber 10, and the fixed blade 12 is provided on the inner surface of the back cover 4 when the back cover 4 is closed. A movable blade 13 that rubs against the blade 12 to form a cutter is fixed.
A portion of the back surface 7 of the camera body 2 that is continuous with the bottom surface 6 is an inner guide member 14 whose upper and lower portions are chamfered as shown in the cross-sectional shape in FIG. At a position covering the periphery of the exposure aperture 9 with a slight gap between the inner guide member 14 and the outer guide member 14, an outer guide whose end surface 15a on the camera bottom side is substantially aligned with the edge 14a of the inner guide member 14 is provided. A member 15 is provided. This outer guide member 15 has an opening 15b in the center, and in this opening 15b are supported by three resilient support pieces 16a, 16b, 16c integrally formed with the outer guide member 15. A film pressure plate 17 is provided. This film pressure plate 17 has a recess 17a in the center of the upper side of the camera (lower in the figure), and a protrusion 18 provided at the lower part in the figure of the exposure opening 9 on the back surface 7 of the camera body 2 is inserted into this recess 17a. I'm getting into it. A film feeding device 19 having a perforation engaging claw 19a is provided on the upper right side of the exposure opening 9 in the drawing. At a position close to the cartridge loading chamber 5 on the back surface 7, near the center in the vertical direction, there is a tongue upper edge defining member 20, and below the tongue upper edge defining member 20 in the figure, a position regulating release member 21 is located on the outside. It protrudes in the direction of the guide member 15. The functions of these members will be explained in detail later.

In addition to the movable blade 13 mentioned above, the inner surface of the back cover 4 has
When the back cover 4 is closed, the film pressure plate 1
A pressure plate pressing member 22 made of an elastic member such as spring steel is provided at a position in contact with the position regulation release member 21, and a protrusion 23 is provided in a position in contact with the position regulation release member 21. Further, an arm-shaped film leader lower edge defining member 24 made of a rigid material is fixed at a position closer to the bottom surface of the camera than the protrusion 23 is. The back cover 4 is secured to the rear surface of the camera body 2 by an engaging portion (not shown) engaging a lock claw 26 operated by a slide button 25 provided on the bottom surface 6 of the camera body 2. Maintain the closed state covering the

The operation of the simple loading camera of this embodiment having the above structure will be described in detail. The slit 8 of the cartridge loading chamber 5 extends substantially tangentially to the cylindrical profile of the loading chamber and is provided so as to be continuous with the gap between the inner guide member 14 and the outer guide member 15. A protrusion 5b is formed on the peripheral wall forming the loading chamber 5. Therefore, only when the recess formed by the film outlet P ₃ of the cartridge P and the main body P ₁ engages with the protrusion 5 b formed by the slit 8 . It is possible to load a cartridge, and therefore the loading direction of the cartridge P can be regulated, and thereby, after the cartridge P is stored in the cartridge loading chamber 5, that state is maintained.

An inner guide member 14 extending parallel to the focal plane of the film during photographing extends toward the winding chamber 10 from the protruding portion 5b. extends in the direction and forms a gap. When the cartridge P is loaded, even if the film leader F is wrapped around the outer peripheral surface of the cartridge P due to its curling property, the cartridge P remains in a state in which its recessed portion is engaged with the protrusion 5b. Since the film leader F is inserted into the cartridge loading chamber 5, the lower edge of the film leader F pulled out from the cartridge P hits the edge 14a of the inner guide member 14, and the film leader F is pulled out one after another along this surface. It is extended in the longitudinal direction of the camera and dropped into the gap between the two guide members. Thus,
The cartridge P can be easily loaded.

Here, as shown in the figure, the bottom surface 6 of the portion forming the protrusion 5b is formed to be gradually higher toward the tip side of the protrusion 5b, and the slit 8 of the protrusion 5b is side edge 5
The edge 14a of the inner guide member 14 that is continuous with the edge 14a of the inner guide member 14 is formed almost horizontally or gradually becomes lower toward the left in the figure. It can be stretched smoothly. Moreover, this edge 14a is the third
As the cross-sectional shape is shown in the figure, it is chamfered and rounded, so the upper edge f ₁ of the film leader F (it is on the lower side in the figure, but it is located on the upper side when the camera is in use). ) and perforation (film perforation)
p is never caught. Furthermore, the inner guide member 1
Since the lower side edge 14b in Figure 4 is also rounded, the lower edge _f2 of the film leader F and the perforation p may get caught on the side edge 14b when the film is pulled out after shooting. do not have. As shown in FIG. 3, the chamfering process as described below is also performed on the perforation engaging claw 19a of the film feeding device 19, and the perforation engaging claw 19a is connected to the film leader F. It is designed to prevent it from getting caught. Such chamfering is effective if it is applied not only to the inner guide member 14 and the perforation engaging claw 19a described above, but also to all the edge portions facing the film leader F when loading and unloading the cartridge. In addition to rounding as described above, this chamfering process may also be a straight chamfering process in which the edges are scraped off.

Further, the film feeding device 19 has a perforation engaging claw 19a that is connected to the inner guide member 1.
The perforation p, upper edge f ₁ , and lower side of the film leader F are formed so as not to protrude toward the rear of the camera beyond the outer surface of the film leader F (α plane in Fig. 3) when loading or unloading the cartridge. The edge _f2 is not caught by the perforation engaging claw 19a.

On the other hand, the outer guide member 1 on the back side of the film leader
Since the inner surface of the film pressure plate 17 disposed in the outer guide member 5 is aligned with the inner surface of the outer guide member 15, the film leader F will not be caught on the outer guide member 15 side.

The lower surface 18a (upper surface in the figure) of the protrusion 18 that has entered the recess 17a of the film pressure plate 17 is
The film leader _F inserted between the inner guide member 14 and the outer guide member 15 is placed in a position where it comes into contact with the upper edge side f1 of the film to keep the film in the correct feeding position. Even if the protrusion 18 is pulled out from the outlet _P3 at an angle downward in the figure, the protrusion 18 will not fall above the lower surface 18a of the camera. Note that this protrusion 18
The front side surface 18b facing the outer guide member 15
is extended beyond the inner surface of the film pressure plate 17 or to a position where it is aligned with the inner surface of the film pressure plate 17, so that the film leader F will not pass between the protrusion 18 and the film pressure plate 17. The upper edge _f1 of the film leader F, which is inserted from above in the figure while being tilted as described above, always comes into contact with the lower surface 18a and its posture is corrected. As described above, the protrusion 18 functions as a defining member that defines the position of the film leader F on the upper side of the camera.
For example, it can also be formed from a pin implanted on the back surface 7 of the camera body 2.

After the cartridge P is loaded into the cartridge loading chamber 5 as described above and the film leader F is extended, the back cover 4 is closed. Here, in the film leader F of a general film, the tip is the inner guide member 1.
Since the film leader F is pulled out from the cartridge P to such an extent that it is positioned between the film leader F and the outer guide member 15, when the film is fed as will be explained later, the leading end of the film leader F will curl into the winding chamber 10 due to its own curling tendency.
The film enters the film winding shaft 11 and is wound around the film winding shaft 11 by an automatic film winding mechanism. However, as mentioned above, in the case of one film manufacturer's film, the film leader F is pulled out quite long, so the tip of the film leader F is not in the winding chamber 10.
Exceeds outward. However, the tip of the film leader F that has passed beyond the winding chamber 10 is cut by the fixed blade 12 and the movable blade 13 that rub against each other when the back cover 4 is closed. The leading end of the film enters the winding chamber 10 in the same manner as in a general film, and can be captured by the automatic winding mechanism described above. Of course, the fixed blade 12 and movable blade 13 that move in this manner do not cut the film leader F when a general film is used. In the present embodiment, the fixed blade 12 and the movable blade 13 are fixed completely independently of each other, but they may be pivoted to each other like scissors, for example, so that they also function as support means for the back cover 4. It may be something.

As mentioned above, the upper edge _f1 of the film leader F is defined by the protruding portion 18, so even if the film leader F is tilted downward in the figure from the outlet _P3 of the cartridge P, the film leader F will be placed in the normal feed position. However, if the film leader F is tilted upward in the figure from the outlet _P3 ,
The film leader lower edge defining member 24, which is fixed to the inner surface of the back cover 4 and passes through the gap 27 when the back cover 4 is closed, hits the lower edge _f2 of the film leader F and moves the film leader F downward in the figure. Push down to set the feeding position. The film leader lower edge defining member 24 is provided in such a position that it abuts the lower edge _f2 of the film leader F near the outlet _P3 of the cartridge P, so that the waist of the film leader F is not bent. The film leader F is reliably pushed down without any problems. Further, since the film leader lower edge defining member 24 is formed into a long arm shape as shown in the figure, before the film leader F is pressed by the film pressure plate 17 (described later) or before it is pinched by the aforementioned cutter, Still film leader F
When it is in a state where it can move freely, it comes into contact with the film leader F, and the film leader F can be easily moved.

Among the films currently available on the market, there are some films in which the amount by which the film leader is pulled out is so small that almost only the tongue at the tip of the film leader is pulled out from the cartridge. When such a film is used, the upper edge f ₁ of the film leader F does not reach the above-mentioned protrusion 18 . Therefore, when the film leader F is tilted downward in the figure, this tilt cannot be corrected by the protrusion 18. However, in this embodiment, the above-mentioned tongue upper edge defining member 20 corrects the downward inclination of the short film leader F in the figure. Hereinafter, this tongue upper edge defining member 20
and its surrounding mechanisms will be explained. FIG. 4 shows the mechanism around the tongue upper edge defining member 20. The tongue upper edge defining member 20 and the position defining release member 21 are provided on one L-shaped movable arm 28. The movable arm 28 has a slide hole 29 extending in the left-right direction in the figure, and is supported by two pins 30 passed through the slide hole 29 so as to be movable in the left-right direction in the figure. A protrusion 31 is provided on the upper part of the movable arm 28, and a spring 32 is hung on the protrusion 31 to bias the movable arm 28 to the right in the figure, that is, toward the back of the camera. A contact portion 35 provided at the upper end of the cartridge position detection member 34 can abut on the right side in the drawing of the downward protrusion 33 provided at the left end in the drawing of the movable arm 28 . The cartridge position detection member 34 is pin 3
6 to be rotatable about the pin 36, and the pin 3 at the base of the abutting portion 35
The pin 36 is biased counterclockwise in the figure by a spring 38 attached to the pin 7. The biasing force of this spring 38 is set to be larger than the biasing force of the spring 32, and when the spring 33 is in contact with the contact portion 35, the movable arm 28 moves to the right in the figure. I don't get it. The lower part of the cartridge position detection member 34 is obliquely inserted into the cartridge loading chamber 5 as shown in the figure. When a cartridge is loaded into the cartridge loading chamber 5, the cartridge position detection member 34 is pushed by the end of the cartridge and rotates clockwise in the figure against the biasing force of the spring 38. Then, this cartridge position detection member 3
Since the contact portion 35 of No. 4 moves away from the projection 33 to the right in the figure, the movable arm 28 moves to the right in the figure by the biasing force of the spring 32. Therefore, the tongue upper edge defining member 20 comes to protrude between the back surface 7 of the camera body 2 and the outer guide member 15, as shown by the two-dot chain line in the figure. This tongue upper edge defining member 20 is set in such a position that its upper end surface 20a is aligned with the cutout side edge f ₃ (see FIG. 1) of the tongue at the tip of the film leader F in the normal feeding position. If the short film leader extended through the slit 8 is tilted downward in the figure from the outlet _P3 , the upper end surface 20a will come into contact with the cutout side edge _f3 to correct this tilt. do. When the back cover 4 of the camera is then closed, the protrusion 23 provided on the inner surface of the back cover 4 pushes the position regulation release member 21 to the left in FIG. Therefore, the movable arm 28 is connected to the spring 3
The tongue upper edge defining member 20 moves leftward in the figure against the biasing force 2, and the tongue upper edge defining member 20 also retreats from the position where it contacts the tongue of the film leader. Therefore, from this point on, the film leader will not be caught by the tongue upper edge defining member 20, and the film can be fed. As shown in FIG. 4, the cartridge position detection member 34 is located at the upper end surface 20a of the tongue upper edge defining member 20.
The tongue upper edge defining member 20 is formed so as to be in contact with the cartridge at a position slightly lower than that (i.e., on the top side of the camera), and when a cartridge with a long film leader pulled out is loaded, the tongue upper edge defining member 20
comes to protrude from the back surface 7 after the upper edge f ₁ of the film leader F has passed. Therefore, in such a case, the upper edge _f1 of the film leader F will not come into contact with the upper end surface 20a of the tongue upper edge defining member 20, thereby making it impossible to load the cartridge.

The film leader F is set in the normal feeding position by the various position regulating means explained above.
When the back cover 4 is closed, the film pressure plate 17, which is pressed by the pressure plate pressing member 22 fixed to the inner surface of the back cover 4, is pressed against the upper and lower running rails 39 of the exposure opening 9. Become. Therefore, the perforation p of the film leader engages with the perforation engaging pawl 19a of the film feeding device 19. In this state, when the film feeding device 19 is activated by turning on the power switch of the camera or pressing the shutter button,
The film is fed. When the back cover 4 is opened, the film pressure plate 17 is moved to the resilient support piece 1.
6a, 16b, 16c, the outer guide member 1
Return to the position where the inner surface is aligned with 5.

In the configuration described above, when the back cover 4 is closed, if the film leader F is long and its tip protrudes outside the camera, the cut tip of the film leader F can be inserted into the camera. Pull out from body 2, then remove camera body 2
It is necessary to sufficiently block light between the camera and back cover 4. In order to achieve sufficient light shielding, for example, the area where the camera body 2 and back cover 4 overlap may be shielded from light by using a telescope or a light shielding moltoprene, or a labyrinth seal such as that described in Japanese Patent Publication No. 1983-23785. Use to block light.

Note that the opening/closing direction of the back cover is not limited to that in the above embodiment, and for example, a back cover that swings around an axis in the vertical direction of the camera may be used, as is widely adopted in general cameras.

As explained in detail above, in the film pressure plate improved simple loading camera of the present invention, the film leader can be smoothly inserted and removed when loading and unloading the cartridge.
Alternatively, the film can be taken out, and the film feeding hole of the film leader can be easily engaged with the film feeding engaging means, so that the film pressure plate improved type simple loading camera of the present invention is extremely convenient in practice.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a camera according to one embodiment of the present invention, FIG. 2 is a partially cutaway perspective view of FIG. 1, and FIG. 3 is a side cross-section showing a part of the camera in FIG. 4 are side sectional views showing a part of the camera of FIG. 1. 1...Simple loading camera, 2...Camera body,
4... Back cover, 5... Patrone loading chamber, 6... Bottom, 7... Back, 8... Slit, 9... Exposure opening, 12... Fixed blade, 13... Movable blade, 14...
...Inner guide member, 15...Outer guide member, 17...
...Film pressure plate, 16a, 16b, 16c...Support piece, 19...Film feeding device, 19a...Perflation engaging claw, 22...Press plate pressing member, F...Film leader, P...Patrone,
p...perflation.

Claims (1)

[Scope of Claims] 1. A cartridge loading chamber disposed on one side of the exposure opening of the camera body, the cartridge loading chamber having a shape that allows a cartridge with a slightly protruding film leader to be inserted along its axial direction; guiding means for guiding the film leader to a film feeding path provided between an exposure aperture and a pressure plate located on the back side of the aperture as the cartridge is dropped into the cartridge loading chamber; In a camera having an engaging means that feeds the film by engaging with a feed hole, the film leader guide means includes an inner guide member on the camera body side and a member supported on the camera body at a distance from the inner guide member. and an outer guide member, on which the pressure plate is elastically supported so as to be movable between an operating position close to the exposure aperture and a rest position farther away. The pressure plate is configured to form a guide surface that is substantially flush with the outer guide member in the rest position, and a pressure plate pressing member is formed in a portion of the back cover corresponding to the pressure plate, and the back cover is When opened, the pressing action of the pressure plate is released and the pressure plate functions as an outer guide surface, and when the back cover is closed, the pressure plate is pressed and biased, and the pressure displacement of this pressure plate causes the pressure plate to function as an outer guide surface. A simple loading camera with an improved film pressure plate, characterized in that a film feed hole and an engaging means can be engaged with each other.