JP2648159B2 - Camera and cartridge loading device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera and a cartridge loading device that can use a film cartridge whose film outlet can be opened and closed.

[Prior Art] In a conventional patrone as a film cartridge for a 35 mm film, a cloth light-shielding material called a brushed telem is fixed at a film outlet portion so as to sandwich the film. Due to the light-shielding material, the pull-out force of the film piece from the film container is heavy, which in the electric hoisting camera increases the power consumption of the hoisting motor,
There is also a problem of increasing the winding sound.

To solve the above problem, U.S. Pat.
There is a film magazine as described in 4221479. This is a patrone like a bivalve with a built-in film spool. After loading into the camera, the patrone like the above-mentioned bivalve opens the film outlet by closing the camera back lid. The film piece can be easily pulled out.

[Problems to be Solved by the Invention] However, in the case described in the above-mentioned U.S. Patent or when the film outlet of the above-mentioned patrone is opened and closed by a motor or an electric circuit,
If the film outlet of the patrone is not closed due to some accident, light rays will enter the patrone from the film outlet when the back cover is opened, and the film in the patrone will be ruined due to light fog There was such a problem.

A first object of the present invention is to provide a camera capable of using a film cartridge whose film outlet is opened and closed, wherein a lid of the cartridge chamber is opened while the film outlet of the film cartridge loaded in the cartridge chamber is open. This is intended to surely prevent the inconvenience that the light beam is opened and the light beam enters the film cartridge.

A second object of the present invention is to provide a cartridge loading device applicable to a photographic film cartridge in which a film outlet is opened and closed, wherein the film outlet of the photographic film cartridge loaded in the cartridge chamber is open. An object of the present invention is to surely prevent the inconvenience that the cartridge loading chamber is opened and light rays enter the photographic film cartridge.

[Means and Actions for Solving the Problems] In order to achieve the first object, the present invention relates to a cartridge chamber in which a film cartridge is loaded in a camera capable of using a film cartridge whose film outlet is opened and closed. Actuating means for opening a film outlet of a film cartridge loaded in the cartridge chamber;
The actuating means comprises a lid for the cartridge chamber which is held closed by a member which moves by opening the film outlet of the film cartridge, and wherein the film outlet of the film cartridge loaded in the cartridge chamber is open. In this state, the camera prevents the lid of the cartridge chamber from being opened.

In order to achieve the second object, the present invention provides a cartridge loading device to which a photographic film cartridge whose film outlet is opened and closed is applied, wherein a cartridge chamber in which a photographic film cartridge is loaded, and a cartridge chamber loaded in the cartridge chamber. Operating means for opening a film outlet of the photographic film cartridge, and a lid of the cartridge chamber held in a closed state by a member which moves by opening the film outlet of the photographic film cartridge, the cartridge A cartridge loading device for preventing the lid of the cartridge chamber from opening when the film outlet of the photographic film cartridge loaded in the chamber is open.

Embodiment FIG. 1 to FIG. 5 relate to a first embodiment of the present invention.

FIG. 1 is a perspective view of a cartridge loading chamber portion of a camera according to a first embodiment of the present invention, and FIG. 2 is a view showing a state in which a back cover opening knob and a patrone cover of the camera of FIG. 1 are disengaged. FIG. 3 is an exploded perspective view of a film cartridge used in the camera of the first embodiment of the present invention, FIG. 4 is a bottom view of the camera of FIG. 1, and FIG. 5 is a camera of FIG. FIG.

1 to 5, reference numeral 103 denotes a patrone as a film cartridge for opening and closing a film outlet as proposed in the above-mentioned U.S. Patent, 101 denotes a camera main body, and 102 denotes a rotatable with respect to the camera main body 101. A camera back lid that is pivotally supported by the camera body 101 and that can close and open the take-out opening of the patrone 103 of the camera body 101, engages with the back cover hook 104a of the back cover opening knob 104, and holds the back cover 102 in the closed position. It has a hook portion 102a for making it work. The back cover opening knob 104 is slidably attached to the camera body 101 by screws 106 that fit into the elongated holes 104c and 104c ′.
A knob 104b for sliding operation from outside and one side of the main body
It has a spring hook portion 104d for hooking a tension spring 105 attached to the dowel 101a on 101. The back cover opening knob 104 is urged leftward by a spring 105 in FIG.

Reference numeral 104e denotes an elastic portion having flexibility and a lock portion having an engaging portion.
When it is pushed down to the right in FIG. 1 against 5, it overcomes the convex portion 101 b on the camera body 101 due to elastic deformation.
To hold the back cover opening knob 104 against the tension spring 105 at that position. Reference numeral 104f denotes an opening knob lock lever, and when the patrone cover 107 that opens and closes the outlet of the film piece of the patrone 103 is opened, the cover 1 is opened.
As shown in FIG. 1, the back cover release knob 104 is brought into contact with the protruding portion 107a of the back cover 107 by the extension spring 105 to release the back cover 102 from the state where the back cover 102 is locked in the closed state. The knob 104b does not move even if it is moved in the direction of the arrow in FIG.

Reference numeral 108 denotes a substrate closing detection switch, which is closed by the end 104g of the knob 104 when the back cover opening knob 104 completely locks the back cover 102 in the closed state.

109 is a leaf spring that locks the patrone lid 107 in a closed position, and one piece is attached to the patrone 103,
At its free end, a convex portion 109 which engages with the concave portion 107b of the cartridge lid 107.
have a. And this leaf spring 109 is the patrone 10
As shown in FIG. 2, when the camera 3 is loaded into the camera, it is bent by the convex portion 101c on the camera body 101, the engagement between the concave portion 107b and the convex portion 109a is released, and the patrone lid 107 is rotatable. It is what becomes.

110 is a patrone opening detection switch, and a patrone lid 1
This switch is closed when 07 is opened.

111 is a light-shielding cloth made of brushed cloth, and a patrone cover 1
It is attached to the chin 107f of 07. In addition, jaw part 10
Two projections 107d are provided on 7f, and the patrone 103 has holes at positions corresponding to the projections 107d. The projection 107d is formed so that the patrone lid 107 is
When the film is rotated around 3c to close the film outlet on the patrone 103, the film enters the perforation hole of the film and fixes the film.

Reference numeral 112 denotes a light-shielding cloth provided on the patrone 103 at a position facing the light-shielding cloth 111.

Reference numeral 121 denotes a motor for opening and closing the patrone cover 107. The output of the motor 121 is connected to a gear 107g of the patrone cover 107 via a reduction gear train 120. The meshing between the reduction gear train 120 and the gear portion 107g is performed by the patrone 103.
Is inserted into the camera body 101, and the patrone 103 is disengaged by removing the patrone 103 from the camera body 101. The cartridge lid 107 opens and closes depending on the rotation direction of the motor 121.

Reference numeral 107h denotes an opening / closing mark of the patrone cover 107, which is distinguished from the other portions of the patrone cover 107 by a conspicuous paint such as red or the like, and as shown in FIG. When this color can be seen through the window 122, the fact that the patrone 103 is open is confirmed and displayed outside.

In FIG. 5, reference numeral 113 denotes a film counter which counts a predetermined number of frames in which film is idle, and generates an H level output until a predetermined number of empty frames are obtained. 115 is a motor for winding and rewinding the film, 114 is a motor control circuit for controlling the motor 115, and 116 is an AND gate.

The power supply voltage + V _CC is applied to the secondary side of the back cover closing detection switch 108, and the power supply voltage + V _CC gives the logic level H of the logic circuit. Primary side is logic level L
The resistor R1 and the AND gate 116 connected to the ground are connected. Also, the patrone open detection switch 11
Similarly, the primary side is connected to the resistor R2 and the AND gate 116 on the primary side and to the power supply voltage + V _CC on the secondary side.

Reference numeral 117 denotes a film presence / absence switch, which is attached to the film running surface of the camera as shown in FIG. 1 and is closed by the thickness of the film and the tension of the film itself when there is a film on the running surface. The primary side is connected to the resistor R3 and the AND gate 116, and the secondary side is connected to the power supply voltage + V _CC .

That is, the AND gate 116 includes three switches 108 and 11
0, 117 are closed and the output of the film counter 113 is H
When H is reached, H is sent to the motor control circuit 114.

The motor control circuit 114 has a control function of driving the motor 115 to rotate in the film winding direction in response to an H level idle feed control signal output from the AND gate 116. Further, the control circuit 114 controls the film feeding at the time of shooting in addition to the idle feeding of the film.
Each control function such as frame advance and rewind control after photographing is completed is also provided.

123 is a motor control circuit of the motor 121, and
When the output of 4 becomes H, the motor 121 is driven so as to open the patrone cover 107. That is, when the patrone 103 is loaded and the back cover 102 is closed, the film presence / absence switch 117 is closed by the film, and the back cover closing detection switch 108 is closed by the back cover opening knob 104, while the patrone 103 is closed. Is closed, the patrone open detection switch 110 remains open, H is output from the inverter 125, and is output to the AND gate 124 via the delay circuit 126. Therefore, all inputs of the AND gate 124 are H. The output becomes H, and the motor control circuit 123 supplies power to the motor 121 so as to open the patrone cover 107.

When the patrone cover 107 is opened and the patrone open detection switch 110 is closed, the output of the inverter 125 becomes L. Then, in order to completely open the patrone cover 107, the delay circuit 126 slightly delays the time when the input to the AND gate 124 becomes L, and then inputs L to the AND gate 124. And And Gate 1
When the output of 24 becomes L, the motor 121 stops,
The opening of the patrone cover 107 is completed. On the other hand, when the patrone open detection switch 110 is closed, the output of the AND gate 116 becomes H, and the idle feeding is started.

After the idle feeding, shooting is performed, and when the film from the cartridge 103 runs out, the film is rewound. When the leading end of the film detects that the film presence / absence switch 117 is opened, the motor control circuit 114 rewinds to the motor 115. At the same time, the H signal is sent to the AND gate 128, and since the patrone cover 107 is open, the H signal of the patrone open detection switch 110 is input via the delay circuit 127. The output of the gate 128 becomes H.

The signal of the AND gate 128 allows the motor control circuit 1
23 supplies power to the motor 121 for closing the cartridge lid 107. Then, by this power supply, the motor 121
When the patrone cover 107 is closed and the patrone open detection switch 110 is opened, the patrone cover
After the signal has been delayed for a time sufficient for 107 to completely close, the L signal is sent to AND gate 128, and the output of AND gate 128 becomes L, so that motor control circuit 123 supplies power to motor 121. Stop, the closing of the patrone cover 107 is completed. Along with this, the protruding portion 107a of the patrone cover 107 retreats from the movement trajectory of the opening knob lock lever 104f of the back cover opening knob 104 as shown in FIG. It is possible to move in the direction, and by performing such an operation, the back cover hook portion 104a is detached from the hook portion 102a, and the back cover 102 can be opened,
Since the opening / closing mark 107h cannot be seen from the window 122, it is possible to confirm that even if the patrone cover 107 is closed and the back cover 102 is opened, no light is cast on the film in the patrone 103.

Next, the operation of the first embodiment of the present invention shown in FIGS. 1 to 5 will be described.

By loading the patrone 103 into the camera, the second
As shown in the figure, the projection 101c of the camera body 101 presses the projection 109a of the leaf spring 109, so that the lock that closed and locked the patrone cover 107 is released.

By closing the back cover 102, the back cover 102
When it is almost completely closed with respect to 1, the hook part of the back cover 102
102a pushes the tip of the lock 104e of the back cover release knob 4. Due to this pressing operation, the lock portion 104e bends and the lock portion 104e
The latch between the camera and the convex portion 101b of the camera body 101 is released, the back cover opening knob 104 runs with the force of the extension spring 105, and the back cover hook portion 104a completely locks the back cover 102 in the closed state and the back cover. The lid closing detection switch 108 is closed. As a result, the patrone cover 1 is driven by the motor 121 as described above.
07 is opened, the protrusion 107a of the patrone cover 107 prohibits the operation of opening the back cover 102 of the back cover opening knob 104 to the right in FIG.
0 is closed, and the film is started to be skipped.

On the other hand, the film is rewound after the photographing is completed, and when the rewound is completed, the operation for opening the back cover 102 of the back cover opening knob 104 becomes possible with the completion of the closing of the patrone cover 107 as described above.

 FIG. 6 shows a second embodiment of the present invention.

FIG. 6 shows a circuit obtained by adding a warning device to the circuit of FIG.

That is, FIG. 5 shows a display example in which the patrone cover 107 is opened and a display window is displayed outside when the patrone cover 107 is open. In the event of an accident, etc., a warning is issued by sound or light at the same time as the end of rewinding.
A warning is issued when the output of 3 is H.

The input of AND gate 133 is the output of AND gate 128,
That is, the patrone closing signal is passed through the delay circuit 132, and the delay time is set to be slightly longer than the time for closing the outlet of the patrone 103, and is also a result of both signals from the patrone opening detection switch 110. It is. That is, if there is a signal to close the patrone 103 and the outlet of the patrone 103 is open after a while, the output of the AND gate 133 becomes H, and a warning is issued.

[Correspondence between Invention and Embodiment] In the above embodiment, the camera body 101 is provided in the cartridge chamber of the present invention (camera and cartridge loading device), and the reduction gear train 120, the motor 121, and the motor control circuit 123 are provided in the present invention ( The camera back cover 102 corresponds to the operation means of the camera and the cartridge loading device, and corresponds to the back cover of the present invention (camera and cartridge loading device).

[Effects of the Invention] As described above, according to the camera of the present invention, in a camera that can use a film cartridge whose film outlet is opened and closed, the cartridge loading chamber is opened with the opening and closing cover of the cartridge open. As a result, it is possible to reliably prevent light rays from entering the film cartridge.

Further, according to the cartridge loading device of the present invention, in a cartridge loading device applicable to a photographic film cartridge whose film outlet is opened and closed, the cartridge loading chamber is opened with the opening and closing cover of the cartridge open, It is possible to reliably prevent light rays from entering the photographic film cartridge.

[Brief description of the drawings]

FIG. 1 is a perspective view of a cartridge loading chamber portion of a camera according to a first embodiment of the present invention, and FIG. 2 is a view showing a state in which a back cover opening knob and a patrone cover of the camera of FIG. 1 are disengaged. FIG. 3 is a perspective view of the patrone portion of the apparatus of FIG. 1, FIG. 4 is a bottom view of the camera of FIG. 1, FIG. 5 is a circuit diagram of the camera of FIG. 1, and FIG. FIG. 4 is a circuit diagram of a camera according to a second embodiment of the present invention. 101 camera body, 102 back cover 103 patrone, 104 back cover open knob 107 patrone cover, 108 back cover close detection switch 110 patrone open detection switch, 114 motor control Circuit 115: Motor, 116: AND gate 117: Film presence / absence switch, 121: Motor 123: Motor control circuit, 124: AND gate 131: Warning device

Claims (2)

(57) [Claims] 1. A camera which can use a film cartridge whose film outlet is openable and closable, wherein: a cartridge chamber in which the film cartridge is loaded; operating means for opening a film outlet of the film cartridge loaded in the cartridge chamber; A camera, wherein the actuating means has a lid of the cartridge chamber which is held closed by a member which moves by opening a film outlet of the film cartridge. 2. A cartridge loading apparatus applied to a photographic film cartridge whose film outlet is opened and closed, wherein a cartridge chamber in which the photographic film cartridge is loaded and a film outlet of the photographic film cartridge loaded in the cartridge chamber are arranged. A cartridge loading device, comprising: an opening operation means; and a lid of the cartridge chamber which is held closed by a member which moves by opening the film outlet of the photographic film cartridge.