JP2000029114A - Film cartridge loading mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a film cartridge loading mechanism small in size and low in cost. SOLUTION: This film cartridge loading mechanism having a cartridge chamber 5 for housing a film cartridge 10 and a cartridge chamber cover 2 for opening/closing the opening part of the cartridge chamber is provided with a lever 7 for locking the cartridge chamber cover 2 in a closed state and pushing out the film cartridge 10 housed in the cartridge chamber 5, when the locking is released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a new photographic system A.
The present invention relates to a film cartridge loading mechanism for a camera based on an advanced photo system (PS), and more particularly to a film cartridge loading mechanism for a camera that performs a locking operation and an unlocking operation when opening and closing a lid of a cartridge chamber.

[0002]

2. Description of the Related Art In such a film cartridge of an APS camera, a cartridge lock LLD (light lock door) for shielding the film is conventionally provided, and an LLD driver for opening and closing the cartridge door is provided on the camera body side. Is provided. Here, in a state where the film cartridge is loaded in the cartridge chamber of the camera main body, the LLD driver engages with the door engaging portion provided at the shaft end of the LLD, and the LLD driver rotates, so that the LLD is rotated. It is a configuration that opens and closes.

On the other hand, needless to say, a cartridge chamber cover for covering the opening of the cartridge chamber is provided for fixing or shielding light from the film cartridge loaded in the cartridge chamber. In order to prevent the chamber lid from being opened, a cartridge chamber lid lock mechanism for holding the cartridge chamber lid in a closed state is also required, and this is also conventionally provided.

[0004]

However, the LLD is closed, for example, after the photographing is completed and before the film cartridge is taken out of the camera body. At this time, the door engaging portion of the LLD receives a side pressure by an LLD driver. However, the LLD driver may not come off from the door engaging portion with the force of the weight of the film cartridge, and it may be difficult to remove the film cartridge even when the cartridge chamber lid is opened. Therefore, in order to easily take out the film cartridge, at least L
A so-called eject mechanism for pushing out the film cartridge until the LLD driver comes out of the door engagement portion of the LD is required.

Therefore, if the eject mechanism and the cartridge chamber lid locking mechanism are integrally formed, a small-sized and low-cost lock / ejection mechanism can be obtained. The present invention is based on such a viewpoint, and a cartridge ejecting member that pushes a film cartridge out of a cartridge chamber, and a cartridge that engages with a part of a cartridge chamber lid and holds the cartridge chamber lid in a closed state An object of the present invention is to provide a small-sized and low-cost film cartridge loading mechanism in which a chamber lid locking member is integrally formed.

[0006]

According to the present invention, there is provided a cartridge chamber for accommodating a film cartridge and a cartridge chamber lid for opening and closing the cartridge chamber opening. And a lock / ejection member for pushing out the film cartridge housed in the cartridge chamber when the lock is released when the lock is released.

Further, the lock / ejection member has a guide means for slidably guiding the lock / ejection member from a lock position to a position where the film cartridge is pushed out through an unlock position.

Further, first urging means for urging the lock / ejection member from the unlock position to the lock position, and second urging means for urging the film cartridge from the unlock position to a position for pushing out the film cartridge. And a biasing means. Further, the first urging means and the second urging means are configured to be shared by one urging means.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1A and 1B are diagrams schematically showing a basic configuration of the present invention, wherein FIG. 1A is a diagram showing the inside of the camera, for example, on the left side when viewed from the back, and FIG. It is. As shown in FIG. 1A, a cartridge chamber cover 2 is provided on the lower surface of the camera body 1 and is rotatable about a shaft 2a. Frames 3 and 4 are formed inside the camera body 1, and a space surrounded by these and the cartridge chamber lid 2 forms a cartridge chamber 5. The lower part of the cartridge chamber 5 is an opening, and is opened and closed by the cartridge chamber lid 2. The film cartridge 10 is loaded into the cartridge chamber 5 from the opening.

A cartridge spool driver 11 and an LLD driver 12 project from the upper portion of the frame 3 toward the lower cartridge chamber 5. These engage with a cartridge spool (not shown) of the film cartridge 10 and a door engaging portion of the LLD, respectively, in a state where the film cartridge 10 is loaded in the cartridge chamber 5. In this state, the LLD driver 12 rotates to open and close the LLD. And
With the LLD open, the cartridge spool driver 11 rotates to load and wind a film (not shown) wound around the cartridge spool.
Rewinding is performed.

On the side surface of the frame 4, guide pins 6a and 6b are arranged one by one at the top and bottom, respectively, and project sideways. Then, as shown in FIG. 3B, guide pins 6a and 6b slidably penetrate into an elongated hole 7a and an L-shaped hole 7b provided in the lever 7 which function as a lock and an eject to be described later. Then, the lever 7 is held.
The upper part of the lever 7 is bent in an L-shape, and the bent part becomes an ejecting part 7d. As will be described later, when the film cartridge 10 is taken out of the cartridge chamber 5, when the lever 7 is pulled down, the film cartridge 10 is pushed out.

Further, as shown in FIG.
An arm 7e extends to the left from near a, and a tension coil spring 8 is mounted between the arm 7e and a hook pin 9 provided on the frame 4 (not shown here). Thereby, the lever 7 receives the moment of the force pulled down in the figure and the force of the counterclockwise rotation. It should be noted that these operations may be performed by separate urging means. A hook 7c is provided at the lower end of the lever 7, and the hook 7b of the cartridge chamber lid 2 is engaged with the hook 7c, so that the cartridge chamber lid 2 is fixed to the camera body 1 in a closed state. Hereinafter, the operation of the film cartridge loading mechanism of the present invention will be described.

FIG. 2 is an explanatory view of the operation of the film cartridge loading mechanism of the present invention. First, the unlocking operation will be described. First, FIG.
0 is loaded and the cartridge chamber lid 2 (not shown here) is closed and locked. In this state,
An operation member 13 for unlocking the camera body 1 to be described later.
Is operated, the upper end of the lever 7 is pushed rightward as shown by the arrow A, and the lever 7 rotates rightward about the guide pin 6a. At this time, the L-shaped hole 7b is moved to the left while sliding with respect to the guide pin 6b, and the hook 7c at the lower end of the lever 7 is disengaged from the claw 2b of the cartridge chamber lid 2, thereby unlocking. The state shown in FIG.

Next, the lever 7 is pulled down by the tension coil spring 8 provided between the arm 7e and the hook pin 9. At this time, the long hole 7a and the L-shaped hole 7b move downward while sliding with respect to the guide pins 6a and 6b, respectively. The film cartridge 10 is pushed down by the upper ejection section 7d, and the state shown in FIG. The lever 7 is further lowered, and L
FIG. 4D shows a state in which the upper end of the character hole 7b is in contact with the guide pin 6b. In some cases, the upper end of the elongated hole 7a may be designed so as to contact the guide pin 6a for positioning. Here, the film cartridge 10 is further pushed out, and the claw 2b of the cartridge chamber lid 2 is further pushed down.

Conversely, when the operation of closing the cartridge chamber lid 2 is performed as a locking operation from the state shown in FIG. 3D in which the film cartridge 10 is loaded, the claw 2 b pushes up the lever 7 as shown by the arrow B. At the same time, the cartridge chamber lid 2 pushes up the film cartridge 10, and the state shown in FIG. FIG. 6B shows a state in which the lever 7 is further pushed up, and the lower ends of the elongated holes 7a and the L-shaped holes 7b reach the positions of the guide pins 6a and 6b, respectively. Here, the film cartridge 10 is completely loaded, and the cartridge chamber lid 2 is also closed.

Finally, from this state, the lever 7 rotates counterclockwise about the guide pin 6a by the moment of the counterclockwise rotation force received from the tension coil spring 8. At this time, the L-shaped hole 7b moves to the right while sliding with respect to the guide pin 6b, the hook 7c at the lower end of the lever 7 engages with the claw 2b of the cartridge chamber lid 2, and the left end of the L-shaped hole 7b Comes into contact with the guide pin 6b, and the state shown in FIG. still,
The frame 4 to which the guide pins 6a and 6b and the hook pins 9 are attached is not shown in FIG.

FIG. 3 is a front view showing the overall structure of the camera according to the present invention. As shown in the figure, the unlocking operation member 13 described above is located near the center of the lower surface of the camera body 1 here. Further, the cartridge chamber lid 2, the cartridge chamber 5, and the film cartridge 10 are as described in FIG. Hereinafter, although not directly related to the present invention, the names of the respective parts are described as 1
4 is a battery mounted on the camera body 1 from below, 15 is its battery cover, 16 is a lens barrel provided near the center of the front, 18 is a viewfinder provided thereon, 19 is a distance measuring device, and 20 is a distance measuring device. A flash 21 is a release button located near the left end of the upper surface of the camera body 1, and 22 is a spool chamber.

The lock / ejection member referred to in the claims corresponds to the lever 7 in the present embodiment, and the guide means penetrates the slot 7a and the L-shaped hole 7b and slidably through these. Guide pins 6a, 6b
The urging means corresponds to the tension coil spring 8.

[0019]

As described above, according to the present invention,
A lock unit integrally formed with a cartridge ejecting member for pushing out the film cartridge to the outside of the cartridge chamber, and a cartridge chamber lid locking member engaging with a part of the cartridge chamber lid and holding the cartridge chamber lid in a closed state. The ejecting member can provide a small and low-cost film cartridge loading mechanism.

Further, according to the fourth aspect, it is possible to further reduce the size and cost.

[Brief description of the drawings]

FIG. 1 is a diagram schematically showing a basic configuration of the present invention.

FIG. 2 is an explanatory view of the operation of the film cartridge loading mechanism of the present invention.

FIG. 3 is a front view showing the overall configuration of a camera according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Camera main body 2 Cartridge chamber lid 3, 4 Frame 5 Cartridge chamber 6a, 6b Guide pin 7 Lever 8 Tension coil spring 9 Hook pin 10 Film cartridge 11 Cartridge spool driver 12 LLD driver 13 Operation member

Claims (4)

[Claims] A cartridge chamber for accommodating a film cartridge; and a cartridge chamber lid for opening and closing the cartridge chamber opening. The cartridge chamber is locked with the lid closed, and the cartridge chamber is unlocked when the lock is released. And a lock eject member for pushing out the film cartridge stored in the cartridge. 2. The apparatus according to claim 1, further comprising guide means for slidably guiding the lock / ejection member from a lock position to a position where the film cartridge is pushed out through an unlock position. A film cartridge loading mechanism as described in the above. 3. A first urging means for urging the lock / ejection member from the unlock position to the lock position, and a second urging means for urging the film cartridge from the unlock position to a position for pushing the film cartridge. 3. The film cartridge loading mechanism according to claim 2, further comprising a biasing means. 4. A film cartridge loading mechanism according to claim 3, wherein said first urging means and said second urging means are shared by one urging means.