JP2000029113A - Film cartridge loading mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a film cartridge loading mechanism capable of surely holding a locking member for keeping a cartridge chamber cover in a closed state in a locking releasing position when the cartridge chamber cover is opened. SOLUTION: This film cartridge loading mechanism having a cartridge chamber 5 for housing a film cartridge 10, the cartridge chamber cover 2 for opening/ closing the opening part of the cartridge chamber 5 and a locking lever 13 for locking the cartridge chamber cover 2 in the closed state is provided with an extension coil spring 15 for energizing the locking lever 13 to a locking position from the locking releasing position and an extension coil spring 14 for indirectly energizing the locking lever 13 to the locking releasing position from the locking position through a locking linkage lever 12. The locking lever 13 is held in the locking releasing position by the energizing force of the coil spring 14, at the time of releasing locking.

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 Such an APS camera has conventionally been provided with a cartridge chamber cover for covering a cartridge chamber opening for fixing a film cartridge loaded in a cartridge chamber of a camera body or for shielding light. However, a cartridge chamber lid locking mechanism for holding the cartridge chamber lid closed is also required, and this is also conventionally provided. And as part of this mechanism,
Conventionally, as a method for holding a lock member that is engaged with a part of the cartridge chamber lid and holds the cartridge chamber lid in a closed state at an unlocked position, the lock member is integrally or separately formed with the lock member. A mechanism for locking by a locking member has been adopted.

Here, when the locking of the lock member by the locking member is released by the operation of closing the cartridge chamber lid by the camera user, the lock member moves from the unlocked position to the locked position, and the cartridge chamber lid is moved. This is the mechanism that engages. Conversely, when releasing the lock, the lock member moves to the unlock position manually or electrically, and is locked by the locking member.

[0004]

However, in the above configuration, the movement of the lock member and the lock member is not smooth due to the influence of friction and the like, and the operation of closing the cartridge chamber lid is insufficient. Occasionally, the lock member may be unlocked and be in the locked position even though the cartridge chamber lid is open. Then, even if the user attempts to close the cartridge chamber lid in this state, there have been problems such that the lock member interferes with the cartridge chamber lid and cannot be closed, or each member is damaged.

Further, some camera models have a system for detecting the position of the lock member to determine the open / closed state of the cartridge chamber lid. In such a case, the cartridge chamber lid is opened in the above state. Since the operation is performed by recognizing that the cartridge is closed, there has been a problem that the initial loading operation of the film cartridge is performed while the cartridge chamber lid is open.

The present invention has been made in view of the above problems, and when the cartridge chamber lid is open, it is possible to reliably hold the lock member for holding the cartridge chamber lid closed at the unlocked position. It is an object of the present invention to provide a film cartridge loading mechanism capable of performing the above.

[0007]

In order to achieve the above object, according to the present invention, a cartridge chamber for accommodating a film cartridge, a cartridge chamber lid for opening and closing an opening of the cartridge chamber, and the cartridge chamber lid are closed. A first urging means for urging the lock member from the unlocked position to the lock position, and a second urging means for urging the lock member from the locked position to the unlocked position. The lock member is held at the unlocked position by the urging force of the second urging means when the lock is released.

Further, the lock member is held at the lock position by the urging force of the first urging means during locking.

[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 8 and an LLD driver 9 project from the upper part of the frame 3 toward the lower cartridge chamber 5. They are,
When the film cartridge 10 is loaded in the cartridge chamber 5, it engages with a cartridge spool (not shown) of the film cartridge 10 and a door engaging portion of the LLD, respectively. In this state, the LLD driver 9 rotates to open and close the LLD. And LLD
When the cartridge spool driver 8 rotates in the state in which the film is opened, loading, winding, and rewinding of a film (not shown) wound on the cartridge spool are 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. 2B, elongated holes 12a and 12b provided in a lock interlocking lever 12 which is a part of a lock member 7 described later and which is a vertically elongated substantially rectangular plate.
The guide pins 6a and 6b respectively penetrate and hold the lock interlocking lever 12 slidably in the vertical direction. Further, a lock lever 13 is attached rotatably around the guide pin 6b. On the other hand, the lock release lever 11 is attached rotatably around a shaft 12c provided above the lock interlocking lever 12. In addition, FIG.
Here, the lock member 7 is drawn in an omitted form.

Further, as shown in FIG. 1B, an arm 12d extends from the vicinity of the center of the lock interlocking lever 12 to the left, and is provided between the arm 12d and a hook 13a provided on the left portion of the lock lever 13. , A tension coil spring 15 is mounted. Thereby, the lock lever 13 receives the moment of the force rotating clockwise in the drawing. A hook 11a provided on the left side of the lock release lever 11 and a hook pin 1 provided on the frame 4 (not shown here)
6, a tension coil spring 14 is mounted. As a result, the lock release lever 11 receives the moment of the force that rotates counterclockwise in the figure, and the lock interlocking lever 12 receives the force that is pulled down.

The hook 11a of the lock release lever 11
The contact portion 11d in the vicinity is the slot 1 of the lock interlocking lever 12.
By contacting the contact portion 12g provided near 2a, the lock release lever 11 is prevented from rotating further to the left. A hook 13b is provided at the lower end of the lock lever 13, and the hook 2b of the cartridge chamber lid 2 is engaged with the hook 13b, whereby the cartridge chamber lid 2 is fixed to the camera body 1 in a closed state. When the lock is released, the hook 13a of the lock lever 13 is used as described later.
The boss 13d provided near the lock interlock lever 12
By contacting the contact portion 12e provided near the long hole 12b, the lock lever 13 holds the unlocked state.

As will be described later, the upper end 11b of the unlocking lever 11 is connected to a crank lever tip 17 to be described later.
The lower end 11 of the lock release lever 11
c pushes on the upper end 13c of the lock lever 13, and as a result,
An unlock operation is performed. Further, the lower end 12f of the lock interlocking lever 12 and the claw 2b of the cartridge chamber lid 2 are
During the lock operation and the lock release operation, they are in contact with each other and push each other.

In FIG. 1B and FIG. 2 below, portions of the lock release lever 11 and the lock lever 13 which are hidden by the lock interlocking lever 12 should be indicated by broken lines, but are simplified. Therefore, it is displayed as a solid line. The mechanism of the lock member 7 is the lock release lever 1.
Alternatively, the lock interlocking lever 12 may be directly urged by the pulling coil spring 14, and the upper end 13 c of the lock lever 13 may be directly pushed by the crank lever tip 17. Hereinafter, the operation of the film cartridge loading mechanism of the present invention will be described.

FIG. 2 is a view for explaining the operation of the film cartridge loading mechanism of the present invention.
Is shown. First, the unlocking operation will be described. First, FIG. 1A shows a state in which the cartridge chamber lid 2 (not shown here) is closed and locked. In this state, the camera body 1 side will be described later. When the unlocking operation member 23 is operated, as shown by an arrow A in FIG.
1 is pushed rightward, and the lock release lever 11 rotates clockwise around the shaft 12c of the lock interlocking lever 12.

At this time, the lower end 1 of the lock release lever 11
1c pushes the upper end 13c of the lock lever 13 to the left to rotate the lock lever 13 counterclockwise. Then, the hook 13b provided at the lower end of the lock lever 13
Then, the engagement with the claw 2b of the cartridge chamber lid 2 is released, and the lock interlocking lever 12 is pulled down by the tension coil spring 14 as shown in FIG. At this time, the elongated holes 12a and 12b move downward while sliding with respect to the guide pins 6a and 6b, respectively, and the lower end 12f pushes down the claw 2b to open the cartridge chamber lid 2.

When the lock interlocking lever 12 is further lowered, as shown in FIG.
Abuts against the boss 13d of the lock lever 13 to urge the lock lever 13 counterclockwise to maintain the unlocked state. At this time, the crank lever tip 1
7 is separated from the upper end 11b of the lock release lever 11, the lock release lever 11 is rotated counterclockwise by the tension coil spring 14, and the contact portion 11d contacts the contact portion 12g to return to the original posture.

Conversely, when the operation of closing the cartridge chamber cover 2 is performed as a locking operation from the state shown in FIG. 3D, that is, the state shown in FIG. Abuts on the lower end 12 f of the lock interlocking lever 12 to push up the lock interlocking lever 12. At this time, the contact portion 12e of the lock interlocking lever 12 is
d, the lock lever 13 is pulled by the tension coil spring 1
5, the hook 13b is rotated clockwise, and the hook 13b is pressed against the claw 2b.

When the lock interlocking lever 12 is further pushed up, the pawl 2b enters the lock position, the lock lever 13 rotates to the lock position, and the pawl 2b and the hook 13b engage as shown in FIG. In this case, a locked state as shown in FIG. Here, the urging force of the tension coil spring 14 has been canceled between the lock interlocking lever 12 and the lock lever 13. Finally, the crank lever 17 returns to the original state, and FIG.
State.

FIG. 3 is a front view showing the overall structure of the camera according to the present invention. As shown in the figure, the above-described unlocking operation member 23 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 2
4 is a battery mounted on the camera body 1 from below, 25 is a battery cover thereof, 26 is a lens barrel provided near the center of the front, 18 is a finder 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.

Incidentally, the lock member referred to in the claims is
The first and second urging means correspond to the lock lever 13 in the embodiment, and correspond to the tension coil springs 15 and 14, respectively.

[0023]

As described above, according to the present invention,
When the cartridge chamber lid is open, it is possible to provide a film cartridge loading mechanism that can reliably hold the lock member that holds the cartridge chamber lid in the closed position at the unlocked position.

According to the present invention, the lock member can be securely held at the lock position during locking.

[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 entire configuration of the 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 Lock member 8 Cartridge spool driver 9 LLD driver 10 Film cartridge 11 Lock release lever 12 Lock interlocking lever 13 Lock lever 14, 15 Tension coil spring 16 Hook pin 17 Crank lever tip 23 Operating member

Claims (2)

[Claims] 1. A film cartridge loading mechanism comprising: a cartridge chamber for accommodating a film cartridge; a cartridge chamber lid for opening and closing the cartridge chamber opening; and a lock member for locking the cartridge chamber lid in a closed state. A first urging means for urging the lock member from the unlock position to the lock position; and a second urging means for urging the lock member from the lock position to the unlock position. A film cartridge loading mechanism, wherein the lock member is held at the unlocked position by a biasing force of a biasing means. 2. The film cartridge loading mechanism according to claim 1, wherein said lock member is held at said lock position by a biasing force of said first biasing means during locking.