JPH0474694B2 - - 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 camera with a simple cartridge loading camera that is improved so that loading of a size film cartridge is easy.

In conventional cameras, when loading the cartridge into the camera, the entire back cover, which is provided on the camera body so as to be openable and closable, is opened wide, and the cartridge is housed in a cartridge storage chamber provided on the camera body, with the upper and lower portions separated. After this storage, the film leader, which has been pulled out by a predetermined amount (varies depending on the manufacturer) from the film outlet of the cartridge, is further pulled out or retracted in order to be wound around the winding shaft of the camera body. Insert the tip of the camera into the winding shaft slit, engage the film perforation with the film advance sprocket, gently operate the shutter button and winding lever, and then close the camera back after confirming that the film is winding. to complete loading the cartridge into the camera. Loading the cartridge into the camera is performed through the operations described above, so the camera operator is required to perform many operations after loading the cartridge into the film storage chamber of the camera body, and these operations are extremely troublesome. For some reason, only a few people were able to perform these operations. For this reason, many camera enthusiasts, such as elderly people, are not good at such operations.
Women and children cannot freely use cameras, and therefore many people have desired a camera that would make it easier to wind the film after the cartridge has been stored.

In order to satisfy the above-mentioned demands, the present applicant proposed, in a previous application, a cartridge storage chamber for storing a cartridge, and a film cartridge drawn out from the cartridge, inside a back cover provided on the camera body so as to be openable and closable. We have proposed a cartridge-loading camera equipped with a cartridge loading section consisting of a film leader guide path extending from the cartridge storage chamber along the back cover to guide the film reader.

However, this cartridge-loading camera works well when the length of the film leader that has been drawn out from the film outlet of the cartridge is appropriate, but the end of the film leader does not separate the back cover from the film guide path. If the film leader that has been pulled out in advance is so long that it jumps out over the winding shaft, there is a problem that the film leader cannot be wound around the winding shaft.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a camera for easily loading a cartridge in which film can be easily loaded into the camera without adjusting the length of the film leader being pulled out in advance.

The cartridge loading camera of the present invention includes a cartridge loading section into which a film cartridge is loaded with the leading end of the film exposed from the cartridge, a back cover which closes to form a dark box after loading the cartridge, and a back cover which closes to form a dark box after loading the cartridge. a film detecting means for detecting that the leading end of the film is exposed to the outside of the camera beyond a light-shielding part between the back cover and the camera body when the lid is closed; a winding means that winds the film into the camera when the film is detected until the film is no longer detected; and a film feeder that feeds the leading end of the film toward the film winding spool after winding is completed. The present invention is characterized by comprising a feeding means.

In this way, the cartridge camera of the present invention can detect if the leading edge of the film is exposed to the outside of the camera beyond the light-shielding part between the back cover and the camera body when the back cover is closed. After the film has been wound into the camera, the leading edge of the film is fed in the direction of the film take-up spool, so even if the leading edge of the film is exposed for a long time from the cartridge, it cannot be directly inserted into the camera. The cartridge can be loaded into the camera without worrying about whether or not the leading end of the film will be exposed to the outside of the camera when loaded.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the cartridge simple loading camera according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view showing a camera 1 for easily loading a cartridge according to the present invention with the back cover open.

In FIG. 1, the symbol P indicates a conventional 35m/m size cartridge loaded into the camera 1,
This cartridge P has a cylindrical cartridge main body P ₁ ,
It consists of a cartridge shaft P ₂ and a film outlet P ₃ that slightly protrudes tangentially or approximately tangentially from the cartridge main body P ₁ . From the outlet P ₃ of this cartridge P, a predetermined amount of film leader F is inserted (varies depending on the film manufacturer).
It's being pulled out.

A camera 1 includes a camera body 2 equipped with a lens L, a viewfinder W, and a central mechanism of the camera, and a hinge (not shown) that is pivotally attached to the center of the bottom surface of the camera body 2 so that it can be opened and closed in the direction of an arrow A. It extends from the back lid 3. A cartridge loading member 4 is provided on the inner surface of the back cover 3 and allows the cartridge P to be dropped and loaded like a cassette. This cartridge loading member 4 has a cylindrical space in the center, and this space forms a cartridge storage chamber 5. The cartridge loading member 4 also has a guide slit 6 for guiding the film leader F into the camera as the cartridge P is loaded into the storage chamber 5.

The camera body 2 has a cartridge loading chamber 7 on the right side in the figure, and a winding chamber 9 on the opposite side across the exposure opening 8. The arrangement of the cartridge loading chamber 7 and winding chamber 9 is as follows:
Although it is desirable that the cartridge P can be loaded and taken out while holding the cartridge _P2 , the loading chamber 7 and the winding chamber 9 do not necessarily have to have this relationship, but may have the opposite relationship. The winding chamber 9 has an automatic film winding mechanism and a film winding shaft (not shown) therein.

Patrone storage chamber 5 of cartridge loading member 4
has a notch 5a that extends parallel to the back cover 3 in the tangential direction of its cylindrical profile and is continuous with the guide slit 6, in order to regulate the direction in which the cartridge is loaded into the cartridge storage chamber 5. . In other words,
The cartridge can be loaded only when the recess formed by the film outlet P ₃ and the main body P ₁ of the cartridge P comes into engagement with the protrusion 5 b formed by the notch 5 a. It is possible and
Therefore, the loading direction of the cartridge P can be regulated, and thereby the cartridge P can be loaded into the storage chamber 5.
After being housed inside, that state is maintained.

A guide member 10 extending parallel to the focal plane of the film during photographing extends toward the winding chamber 9 from the protruding portion 5b, and this guide member 10 forms the guide slit 6 between it and the back cover 3. do. 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 it is inserted into the storage chamber 5, this patrone P
The lower side of the film leader F that has been pulled out from the guide member 10 touches the upper surface of the guide member 10, and is successively extended in the direction of the cartridge half-way along the guide member 10 and dropped into the slit 6. In this way, the cartridge P can be easily loaded.

The guide member 10 has a length that exceeds the exposure aperture 8, and its tip 10a is curved downward. The guide member 1 is placed around the exposure aperture 8.
A groove 11 for accommodating 0 is formed, and this groove 1
The shape of the guide member 1 is the same as the outline shape of the guide member 10. A film feeding device 12 is provided between the right end of the groove 11 and the right side of the exposure opening 8, which engages with the perforation of the film to automatically feed or wind the film. The film feeding device 12 is driven by a motor (not shown).

With the above structure, when the cartridge P is loaded in the state shown in FIG. 1, the film leader F is guided by the guide member 10 into the slit 6 and supported in an extended state. When the back cover 3 is closed, the cartridge loading member 4 and guide member 10 provided on the back cover 3 are accommodated in the cartridge loading chamber 7 and the groove 11 of the camera body 2, respectively, and from then on there is no need for film travel. has no effect on At the same time, the film leader F is pressed by a film pressure plate provided on the back cover (not shown) against the traveling rail surface provided above and below the exposure aperture 8 of the camera body 2, so that the perforation of the film leader is It engages with the claw 12a of the feeding device 12. In this state, the film feeding device 12 is activated by turning on the power switch of the camera or pressing the shutter button to feed the film.

The cartridge is loaded and the film is fed as described above, but if the length of the film leader is so long that the tip of the film leader exceeds the film guide slit 6 and protrudes out of the camera when loading the cartridge, the above-mentioned automatic Loading cannot be performed properly.

Therefore, in the camera of the present invention, it is detected that the film leader F has protruded out of the camera, and upon this detection, the film feeding device 12
The film is rotated in the opposite direction to rewind the film into the cartridge until the film leader fits inside the camera, thereby allowing the cartridge to be completely loaded.

An example of the detection device 20 for detecting that the film leader F has protruded out of the camera will be described with reference to FIG.

A groove 22 extending in the vertical direction is provided near the side 21 of the back cover 3 opposite to the side on which the cartridge loading member 4 is provided. The lever 23 is the pivot 24
It is pivoted by. This lever 23 is biased clockwise in the figure by a spring (not shown), and in a normal state, the first arm 23a engages with the groove 22 and the lever 23 rotates counterclockwise. Second arm 23 that closes the time switch 25
It has b. The switch 25 is a switch for reversing the feeding device 12. Note that in FIG. 2, reference numeral 26 is a winding shaft.

In the above configuration, if the film leader F protrudes outside the camera, as shown in Figure 3,
Due to the action of the film leader F, the first arm 23a of the lever 23 cannot engage the groove 22, so the lever 23 rotates counterclockwise, and the second arm 23b closes the switch 25. By closing the switch 25, the feeding device 12 is reversed, so that the film is rewound into the cartridge P. When this film is rewound and the end of the film leader F is fed into the camera beyond the position of the first arm 23a, the action of the film is lost and the lever 23 is moved so that the first arm 23a engages with the groove 22. As a result, the switch 25 is opened as shown in FIG.
2 is stopped. At the same time, if the feeding device 12 is rotated in the forward direction, feeding of the film is started.

In the configuration described above, when the back cover 3 is closed, the film leader protruding outside can be drawn into the camera, and after the film leader is completely drawn into the camera, the back cover and camera body are removed. It is necessary to ensure that there is sufficient light shielding between the In order to achieve sufficient light shielding, for example, the area where the camera body 2 and back cover 3 overlap can be shielded from light by using a telescope or a light shielding moltoprene, or by using a labyrinth seal as described in Japanese Patent Publication No. 1983-23785. Use to block light. Furthermore, the lever 23 can be made vertically elongated as shown in FIG. 4, and the lever itself can function similarly to a labyrinth seal to shield light.

In the embodiments described above, the end of the film leader protruding outside the camera is detected by mechanical means, but it may be detected by, for example, photoelectric detection means.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the cartridge simple loading camera of the present invention with the back cover open, FIG. 2 is a horizontal cross-sectional view showing the main parts of the camera of the present invention, and FIG. FIG. 4 is a horizontal sectional view showing the operating state of the film leader end detection device in the camera shown in FIG. 4, and FIG. 4 is a perspective view of a lever used in the film leader end detection device. 4... Patrone loading member, 20... Detection device, 22... Groove, 23... Lever.

Claims (1)

[Claims] 1. A cartridge loading section for loading a film-containing cartridge in which the leading end of the film is exposed from the cartridge, a back cover that closes after loading the cartridge to form a dark box, and when the back cover is closed, film detection means for detecting that the leading end of the film is exposed to the outside of the camera beyond a light-blocking portion between the back cover and the camera body;
a winding means for winding the film into the camera until the film is no longer detected when the film detecting means detects the film; and a winding means for winding the film into the camera until the film is no longer detected; 1. A camera for easily loading a cartridge, characterized by comprising a film feeding means for feeding the film to the camera.