JPH0143701Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a camera, and in particular to an improvement in the cartridge loading format for a camera.

In the past, loading a cartridge with a built-in 35m/m film into the camera and winding the film leader around the take-up shaft was extremely troublesome, so in order to simplify this operation, various automatic film leaders have been developed. Cameras with built-in mechanisms have been proposed. However, even with this type of camera, there are some that require the film leader to be pulled out near the take-up chamber, and that the film does not rise from the running surface due to its own curling properties until the back cover is closed. In most cases, it is necessary to hold the film in place by hand, and in the case of cameras with a special winding chamber, it is necessary to insert the film leader into the insertion slit in the winding chamber. Therefore, it has not been possible to completely eliminate the need for manual work for winding the film.

In view of such drawbacks of the conventional method, the applicant first proposed the following:
In Japanese Patent Application No. 55-186574, we proposed a camera that was an improved version of the cartridge-loading type, which had a simple structure and did not require manual work to wind the film. The structure of such application is that a cartridge loading member is provided between the camera body and the back cover, and is exposed from the camera body side when the back cover is opened, and the cartridge loading member is separated from the film winding chamber for exposure. On the opposite side of the cartridge opening, there is a cartridge loading chamber configured to allow loading only from the axial direction of the cartridge and to hold the cartridge when the cartridge is loaded;
The present invention is characterized by having a guide member for guiding the film leader section drawn out in advance from the film outlet of the cartridge into the camera, and the present invention improves the guide member of the above-mentioned application. This further improves the way the cartridge is loaded.

Hereinafter, the present invention will be explained with reference to the drawings.

Fig. 1 shows the camera of the present invention, and is a perspective view with the camera back cover removed to clearly show the inside of the camera and the mechanism of the back cover.
- A sectional view taken along the X-line, and FIG. 3 is a perspective view showing a state in which the guide member and the film leader portion are in contact with each other.

P indicates a cartridge to be loaded, which is composed of a winding shaft 1, a body plate 2, and a film outlet 3. F
indicates the film leader portion which has been drawn out from the draw-out port 3 in advance. 4 is a camera body, 5 is a back cover, and has a cartridge loading member 9 at a position corresponding to a cartridge storage chamber 6 of the camera body 4. A film leader guide member 12 is provided at the left end of the loading member 9, and has a first guide portion 12 extending in the film running direction and a second guide portion 16 extending in the film width direction at the tip of the guide portion 12. Reference numeral 13 denotes an exposure frame, and 14 and 15 denote film running rails.The rails 15 and 15 protrude further toward the film surface than the rails 14 and 14, and restrict movement of the film in the width direction. 7 is a film winding chamber in which a winding shaft and a known automatic film winding mechanism (not shown) are installed.
is built-in, and 8 indicates the cover of the mechanism.
8a is a slit for guiding the film leader to the take-up shaft, 22 is a sprocket provided between the cartridge loading chamber 6 and the exposure frame 13, and 21 is for housing the film guide member 12 when the back cover is closed. a recess with a contour corresponding to the projected image of the guide member,
Numerals 20 and 20 are protrusions having inclined surfaces, and are provided between the upper traveling rail 15 and the lower part of the military book section with an appropriate interval.

This guides the film reader, which will be described later. Reference numeral 18 denotes a groove in which the winding shaft 1 is housed when loading the cartridge, and both ends of the groove 18 have inclined surfaces 19, 19 shown in FIG. This controls the height direction position when the cartridge is loaded into the storage chamber. Next, to explain the back cover 5 and the loading member in detail, the bottom of the back cover 5 is connected to point C on the bottom of the camera body, and rotates around point C as shown by the arrow A-A line. It is configured to rotate by a predetermined angle and stop at a position where the cartridge loading member 9 is exposed. The cartridge loading member 9 may be fixed to the back cover as shown in the figure, or may be configured to interlock so that it projects independently of the back cover when the back cover is opened. 10 has a chamber in which the cartridge is placed, with a contour line 10 approximating the cross section of the cartridge P;
A film outlet is located between the protrusion 11 and the back cover 5. The above-mentioned guide member 12 is provided on the opposite surface of the protrusion 11, and curves slightly downward at the middle 12a of the first guide part. This results in
Since the sprocket 22 is provided in the camera body, the upper teeth of the sprocket 22 and the guide member do not come into contact with each other. Reference numeral 17 denotes an inclined surface provided at the intersection of the first guide 12 and the second guide 16. When a cartridge having a short film leader is loaded and the film leader is pulled out toward the take-up chamber, the tip of the leader is placed at the intersection of the first guide 12 and the second guide 16. This makes it easier to climb over the two guide members 16.

Next, a method of loading a cartridge into the camera according to the present invention will be described.

First, when the cartridge is dropped into the cartridge loading member from the axial direction with the winding shaft 1 facing upward, the protrusion 11 engages with the depression 3a formed between the film outlet 3 and the body plate 2, and the film is loaded. Even if the tip of the leader is curled, it is later extended away from the cartridge by the protrusion 11 and the film guide member 12, and the film leader is inserted into the slit formed between the back cover 5 and the guide member 12. guided inward. Figure 3 shows the state when the cartridge is dropped, with the camera back omitted. However, since the length of the film leader section varies depending on the type of film, it may be necessary to draw it out for a long time beforehand. In the case of a film that is
Conversely, if it is short, it has not reached the second guide member 16. If the reader is pulled out for a long time,
The upper side of the film leader comes in contact with the guide member 12 and its position is regulated, but the lower end has a habit of trying to get inside (camera lens side), so the second
If there is no guide member, there is a risk that the bottom end of the leader will bend when the back cover is closed, making it impossible to transfer the leader, but with the presence of the second guide member, the bottom end of the leader will be displaced inward. can be regulated and prevent any hindrance to transportation. On the other hand, even if the film leader is short, the upper side of the film leader contacts the guide member 12 and its position is regulated as described above, and the lower end curls and is located inside the guide member 12. In this case, if you close the back cover and feed the film leader through the sprocket, the tip of the film leader will be guided by the inclined surface 17 provided at the tip of the first guide member. 2. Can go over the guide member. In particular, in consideration of the case of a film with strong curling, one end (winding chamber side) of the exposure frame 23 may be displaced by a spring. (It is omitted as it is written in .)

Furthermore, when the back cover is closed, the height of the top surface of the cartridge is regulated by the sloped surface on the camera side.
On the other hand, the film leader section also has running rails 15, 1.
5, but even if the tip of the film leader is displaced upward, it will be displaced downward by the inclined surfaces 20, 20 when the camera back is closed, so that it will be securely guided to the rail. It can be placed between. A spring may be used to restrict the upper end of the cartridge. In order to simplify the loading of cartridges, it is necessary that the film leader be placed in a correct and prescribed position, but in the present invention, the leader position can be easily regulated using the above-described structure. When the back cover is closed, a film pressure plate (not shown) presses the film against the running rail, and driving starts with the perforation and sprocket 21 engaged, moving the film leader into the take-up chamber slit 8.
a and can be wound around the winding shaft. By employing a known electric hoisting mechanism for driving the hoisting shaft and sprocket 21, the operation can be made simpler than a manual method. Further, the automatic winding mechanism does not need to have a structure having the slit cover described above.

When you have finished shooting, you rewind the film into the cartridge and take it out, but in reality,
Rewinding is stopped with the leader portion slightly protruding.

Even in this case, the protruding leader part is
Since it is supported in an extended state by the guide member 12, the cartridge can be taken out smoothly.

If necessary, the first guide member may also have guide means 12' directly below the upper sprocket 22.

From the above-described structure, according to the present invention, since the film guide member is improved, even if the film leader section curls, the leader section can be correctly positioned, so that the cartridge can be loaded. , there is no need for manual work to automatically wind the winding around the winding shaft, and this can be done reliably.

Note that the second guide member does not necessarily need to be provided at the tip of the first guide member, but may be provided on the first guide so as to be located between the exposure frame and the take-up chamber.

[Brief explanation of drawings]

Fig. 1 is a perspective view of the camera according to the present invention with the back cover removed, Fig. 2 is a sectional view of Fig. 1 taken along the line X-X, and Fig. 3 shows the camera with the cartridge loaded. The perspective view and FIG. 4 each show a schematic diagram showing a modified example of the guide member. 5... Back cover, 9... Patrone loading member, 12
...Film guide member, 16...Second guide member.

Claims (1)

[Scope of utility model registration request] In a camera equipped with a cartridge loading member between the camera body and the back cover, when loading the cartridge into the cartridge loading member, a guide member is provided to restrict the insertion position of the film leader section protruding from the cartridge into the camera. The guide member is provided on the exposure frame side of the cartridge loading member, and the guide member has a length exceeding the exposure frame and protrudes toward the exposure frame, and the first guide means holds the film at a position beyond the exposure frame. A camera characterized in that a second guide means extending in the width direction is provided, and a notch is formed in the film running surface of the camera body to accommodate the guide member when the back cover is closed.