JPH06118475A - camera - Google Patents

Abstract

(57) [Summary] [Object] The present invention relates to a camera having a patrone chamber of a normal size, and an object thereof is to surely prohibit the operation of the camera when a small patrone is loaded. [Structure] The Patrone loaded inside the Patrone
A detecting means for detecting whether it is a normal cartridge or a small cartridge, and a detecting means for prohibiting the operation of the camera when the cartridge loaded in the cartridge chamber by this detecting means is a small cartridge. Be prepared and configured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera, and more particularly to a camera having a patrone chamber of a normal size.

[0002]

2. Description of the Related Art Generally, a 35 mm roll film has a structure shown in FIG.
As shown in (a) of (a), the cartridge is housed in a cartridge 11 having a diameter A (hereinafter referred to as a normal cartridge), and in this state, the cartridge is used by being loaded in the cartridge chamber.

However, since the patrone 11 is normally used even when the number of films is small, when the number of films is small, only the patrone becomes large compared to the number of films, which is inconvenient for carrying. There was a problem that it would occur.

Therefore, recently, as shown in FIG. 5 (b), when the number of films is small, the film is accommodated in a patrone 13 (hereinafter referred to as a small patrone) having a diameter B which is sufficiently smaller than the diameter A. Is being done.

Since the small-sized cartridge 13 has only the diameter B smaller than that of the normal cartridge 11, and the dimensions of the other parts are not changed, it can be loaded in the cartridge chamber of a normal camera.

[0006]

However, such a small patrone 13 is mistakenly or intentionally
If it is used by loading it in the cartridge chamber of a normal camera, the rattling of the small cartridge 13 in the cartridge chamber becomes extremely large, which may interfere with the film feeding operation and cause a camera failure. There was a problem.

The present invention has been made in order to solve such a conventional problem, and an object of the present invention is to provide a camera capable of reliably inhibiting the operation of the camera when a small cartridge is loaded.

[0008]

The camera of the present invention includes a detecting means (for example, push switch 27 in FIG. 1) for detecting whether the cartridge loaded in the cartridge compartment is a normal cartridge or a small cartridge. , The patrone loaded in the patrone chamber by this detection means
It has a control unit (for example, the control unit in FIG. 3) that prohibits the operation of the camera when it is determined that the device is a small-sized cartridge.

[0009]

In the camera of the present invention, when the detecting means determines that the patrone loaded in the patrone chamber is a small patrone, the control means prohibits the operation such as film feeding which causes the camera to malfunction. It

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings. FIG. 1 shows a cartridge chamber and its vicinity of an embodiment of the camera of the present invention. A camera body 21 forms a cartridge chamber 23.

A DX code detecting pin 25 is arranged on the side of the camera body 21 opposite to the cartridge chamber 23. The DX code detection pin 25 is composed of a leaf spring, a rear end portion 25a thereof is fixed to the camera body 21, is constantly urged toward the cartridge chamber 23 side, and a front end portion 25b thereof is the camera body 2.
1 is abutted.

A triangular contact portion 25c is formed on the tip end 25b side of the DX code detection pin 25, and this contact portion 25c extends from the opening 21a formed in the camera body 21 toward the cartridge chamber 23 side. It is projected.

The tip portion 2 of the DX code detection pin 25
A push switch 27 is fixed to a portion (not shown) of the camera body 21 on the opposite side of 5b from the cartridge chamber 23.

In the patrone chamber 23 described above, as shown in FIG. 2, when the normal patrone chamber 11 is loaded into the patrone chamber 23, the contact portion 25c of the DX code detecting pin 25 is pressed and the tip portion 25b becomes the patrone chamber 23. It is moved to the opposite side and the push switch 27 is turned on.

On the other hand, as shown in FIG. 1, when the small cartridge 13 is loaded in the cartridge chamber 23, since the diameter of the small cartridge 13 is small, the small cartridge 13 is small.
Does not come into contact with the contact portion 25c, and the push switch 27 is turned off.

This is the rotary hole 1 of the small cartridge 13.
This is because 3a (shown in FIG. 5) is fitted to a rewinding fork (not shown) located in the center of the cartridge chamber 23, and the small cartridge 13 is positioned in the center of the cartridge chamber 23.

In FIG. 1 and FIG. 2, reference numeral 29
Indicates a front cover, and reference numeral 31 indicates a back cover. Figure 3
It is a block diagram of the above-mentioned camera, the code | symbol 33 is CPU.
It shows a control unit consisting of.

The control unit 33 includes a push switch 2
7 and the DX code detection pin 25 are connected,
The release switch 35 and the motor drive unit 37 are connected.

FIG. 4 is a flowchart showing the operation of the camera described above. First, when the release button of the camera is pressed, the release switch 35 (half-press switch) is turned on (step S101), and it is determined whether a DX code signal is input from the DX code detection pin 25 (step S102). .

When a DX code signal is being input,
Since the normal cartridge 11 having the DX code is loaded in the cartridge chamber 23, the ISO sensitivity is set based on the DX code signal (step S103), and thereafter, the ISO sensitivity is set.
Easy loading is performed to wind up to the frame where the first image is captured (step S104).

On the other hand, when the DX code signal is not input in step S102, it is determined that the push switch 27 is turned on (step S105). When the push switch 27 is on, the normal cartridge 11 without the DX code is loaded in the cartridge chamber 23, so the ISO sensitivity is set to 100 (step S106), and then the easy loading is performed (step S106). S104).

On the other hand, when the push switch 27 is off, the operation of the camera is prohibited because either the small cartridge 13 is loaded in the cartridge chamber 23 or the cartridge is not loaded.

As described above, in the camera of the present invention, the push switch 27 for detecting whether the patrone loaded in the patrone chamber 23 is the normal patrone 11 or the small patrone 13, and the push switch 2
Since the control section 33 for prohibiting the operation of the camera when the patrone loaded in the patrone chamber 23 by 7 is the small patrone 13 is provided, when the small patrone 13 is loaded, The operation can be surely prohibited.

Therefore, the small cartridge 13 is erroneously
Alternatively, even when it is intentionally loaded and used in the cartridge chamber 23 of a normal camera, the operation such as the feeding of the film is not performed, and the possibility that the camera breaks can be reduced.

[0025]

As described above, in the camera of the present invention,
When the patrone loaded in the patrone chamber is a normal patrone or a small patrone, and the detecting device detects that the patrone loaded in the patrone chamber is a small patrone, the camera Since the control means for prohibiting the operation of
There is an advantage that the operation of the camera can be surely prohibited when the small-sized cartridge is loaded.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a cartridge chamber and its vicinity in an embodiment of a camera of the present invention.

FIG. 2 is a cross-sectional view showing a state in which a normal cartridge is loaded in the cartridge chamber of FIG.

FIG. 3 is a block diagram of the camera of FIG.

FIG. 4 is a flowchart showing an operation of the camera of FIG.

FIG. 5 is a perspective view showing a normal patrone and a small patrone in comparison.

[Explanation of symbols]

 11 normal patrone 13 small patrone 23 patrone chamber 27 push switch 33 controller

Claims (1)

[Claims] 1. A detection means for detecting whether the patrone loaded in the patrone chamber is a normal patrone or a small patrone, and the patrone loaded in the patrone chamber by the detection means is judged to be a small patrone. A control means for prohibiting the operation of the camera when the camera is operated.