JP3165002B2 - camera - Google Patents

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 in which a film cartridge having a movable light-shielding member for opening and closing a film feed opening so as to be light-shielded is mounted.

[0002]

2. Description of the Related Art A camera using a film cartridge having a movable light-shielding member is disclosed, for example, in Japanese Patent Laid-Open Publication No.
1836 and Japanese Patent Application Laid-Open No. 1-191837. These cameras include a lid detecting means for detecting that a lid member for opening and closing the cartridge chamber is closed, and a movable light-shielding member for a film cartridge loaded in the cartridge chamber after detecting the closed state of the lid member by the detecting means. And a light-shielding member driving means for engaging and opening the light-shielding member. After the movable light-blocking member is opened, the film feeding means on the camera side engaged with the cartridge shaft operates to rotate the cartridge shaft,
The film is driven for feeding.

However, when the film cartridge is loaded into the cartridge chamber, for example, the cartridge shaft and the film feeding means are engaged in a state where their rotation axes are not aligned, and the position of the film cartridge is shifted. In some cases, the cartridge shaft and the film feeding unit may be engaged without the movable light shielding member engaging with the light shielding member driving unit. In the former case, smooth rotation cannot be performed even if the film feeding means is operated to rotate, so that an excessive load may be applied to the film feeding means. On the other hand, in the latter case, even if the cover member is closed, the movable light-blocking member does not open, so that the film cannot be fed from the cartridge even if the film driving means is rotated, and the film feeding means is eventually overloaded. There is a risk of becoming a state.

In view of the above, the present applicant has proposed that, in addition to the lid detecting means for detecting that the lid member is closed, the cartridge is placed at a proper position in the cartridge chamber (when the cartridge shaft and the film feeding means are engaged, If the cartridge has a movable light-shielding member, cartridge detection means for detecting that the movable light-shielding member is loaded (at a position where the movable light-shielding member is engaged with the light-shielding member driving means) is provided, and the detection by both the detection means is performed. A configuration in which the film feeding means is operated only occasionally is proposed.

However, a limit switch is usually used for the cartridge detecting means, and even if the limit switch is set to output a detection signal only when the film cartridge is strictly loaded in a proper position, Due to the operation error of the limit switch or the like, a situation may occur in which the detection signal is not output even though the film cartridge is loaded at the proper position. For this reason, the limit switch is normally set so as to output a detection signal when the film cartridge approaches the normal position to some extent. Accordingly, if the film cartridge is initially loaded at least in a state where the detection signal is output from the cartridge detection means, the film cartridge is securely loaded at the proper position by being pressed by the closed lid member or the like. .

[0006]

By the way, even if the film cartridge is initially loaded in a state where no detection signal is output from the cartridge detecting means, the film cartridge is pushed into the proper position by closing the lid member. In some cases, the cartridge may be pushed to a position where the detection signal is output from the cartridge detection means, though the position is not the normal position. However, after the lid member is closed, the state of the film cartridge in the cartridge chamber cannot be seen. For this reason, if the detection signal is output from the cartridge detecting means after the lid member is closed, it cannot be confirmed whether or not the film cartridge is truly loaded in the proper position, and the film cartridge is not loaded in the proper position. Activating the feeding means cannot avoid overloading the film feeding means.

It is therefore an object of a first invention according to the present application to provide a camera capable of reliably detecting a film cartridge loading failure.

[0008] Further, an object of the second invention according to the present application is as follows.
It is an object of the present invention to provide a camera capable of clearly notifying a user when a film cartridge is not loaded in a proper position.

[0009]

According to a first aspect of the present invention, there is provided a cartridge chamber in which a film cartridge is loaded, a cover member for opening and closing a loading port of the cartridge chamber, and a film cartridge. In a camera having film feeding means for feeding a film after being loaded in the cartridge chamber, a cartridge detecting means for detecting that a film cartridge is loaded in the cartridge chamber, and a lid member are closed. a lid detection means for detecting that, after it is detected that the lid member is closed by a lid detecting means, the film cartridge is loaded in the cartridge chamber is detected from a state that is not detected by the cartridge detection means Status
When it becomes is provided with a judging means for performing loading defect determination of the film cartridge.

In such a camera, when the film cartridge is initially loaded at a position where detection is not performed by the cartridge detecting means, and is moved to a position where detection is performed by the cartridge detecting means after closing the lid member, It is determined that the loading is defective. In other words, any state where there is a possibility that the film cartridge is not loaded at the proper position is determined to be a loading failure. For this reason, by providing a control means for stopping the operation of the film feeding means when it is determined that the loading is defective, the overload operation of the film feeding means can be reliably prevented.

In the first invention of the present application, the film cartridge has a movable light shielding member for opening and closing the film feed port of the cartridge, and the lid is engaged with the movable light shielding member of the film cartridge loaded in the cartridge chamber. It is preferable to apply the present invention to a camera provided with a light shielding member driving unit that opens the movable light shielding member when the member is closed.

According to this, the film feeding means operates only in a state where the film cartridge is located at the regular position and the movable light shielding member is securely opened, so that the film is smoothly fed, and the film is fed. Overload operation of the means can be prevented.

In the second invention of the present application, a camera is provided with a warning unit for giving a warning when a loading failure of a film cartridge is determined.

According to this, when the film driving means does not operate due to the operation of the first invention even though the film cartridge is loaded in the cartridge chamber and the lid member is closed, the cause, that is, the film It is possible to clearly inform the user that the cartridge may not be loaded at the proper position.

If the warning means gives a warning by displaying a mark or the like, the user can immediately know that the film driving means will not operate due to a defective loading of the film cartridge simply by looking at the display. .

Further, if the warning means issues a warning by a sound such as a buzzer sound, the user can know the improper loading of the film cartridge without looking at the warning display.

[0017]

【Example】

(First Embodiment) FIG. 1 shows a film cartridge used in the camera system of the present invention. Reference numeral 110 denotes a film cartridge that stores and winds a film. The film cartridge 110 is provided with the following parts. Reference numeral 120 denotes a movable light blocking member for opening and closing the film feed port 115 through which the film enters and leaves. 1
Reference numeral 21 denotes a light-shielding member opening / closing engagement portion that drives the movable light-shielding member 120. The engaging portion 121 has a hole 1 with a key groove.
22 are formed. Further, 130 is a cartridge shaft around which the film is wound. A hole 131 with a key groove is also formed at the end of the cartridge shaft 130.

Next, a configuration around a cartridge chamber of a camera using the present film cartridge will be described with reference to FIGS. 2 and 3, reference numeral 200 denotes a body of the camera, and reference numeral 201 denotes a lock member engaging portion with which a member for locking the cartridge chamber lid is engaged. 210 is
A cartridge chamber in which the film cartridge 110 is loaded. A light-shielding member drive mechanism 220 for opening and closing the movable light-shielding member 120 of the film cartridge 110 is provided below the cartridge chamber 210.
From the engaging member 2 that engages with the light-shielding member opening / closing engaging portion 121
21 is extended. The engaging member 221 is formed in a keyed shaft shape that can be engaged with the key grooved hole 122 of the light shielding member opening / closing engaging portion 121. For this reason, when the phase of the key of the engagement portion 121 and the key groove of the hole 122 are shifted,
It is impossible to load the film cartridge 110 into a proper position in the cartridge chamber 210. Further, when the engagement member 221 is engaged with the light-shielding member opening / closing engagement portion 121, a fixing mechanism (not shown) of the movable light-shielding member 120 is provided.
Is released, and the movable light shielding member 120 is turned.

Reference numeral 230 denotes a film drive motor of a film feeding mechanism for driving the cartridge shaft 130 to feed a film from the film cartridge 110 or rewind the film into the film cartridge 110.
A power transmission shaft extends from the film drive motor 230 into the cartridge chamber and engages with the cartridge shaft 130. The power transmission shaft 231 is connected to the cartridge shaft 130.
When the key of the power transmission shaft 231 is out of phase with the key groove of the hole 131, the film cartridge 110 is inserted into the cartridge chamber 210. It is not possible to load in the normal position inside.

Reference numeral 240 denotes the cartridge chamber 2 in the closed state.
10 is a cartridge chamber lid for shielding the light 10 and fixing the cartridge 110. The lid 240 is connected to the hinge 2
60 is attached to the camera body so that it can be opened and closed freely. The following members are attached to the cartridge chamber lid 240. 241 is a cartridge chamber lid 2
An operation member that is operated to lock the door 40 after the door 40 is closed, and is provided to protrude from the outer surface side of the lid 242. Reference numeral 242 denotes a cartridge positioning member.
Of the cover 242, and can be protruded and retracted in the thickness direction of the lid 242. The positioning member 242 is urged by a spring in a direction in which the film cartridge 110 loaded in the cartridge chamber 210 is pressed against the power transmission shaft 231 and the engaging member 221 with the cartridge chamber lid 240 closed. . Reference numeral 243 denotes a cartridge chamber lid locking member.
It is housed so as to be able to protrude and retract with respect to the end face of 40.
The lock member 243 operates the operation member 241 in a state where the lid 240 is closed, so that the cartridge chamber lid 240
From the cover 240 by engaging with the engaging portion 201.
To lock.

Reference numeral 250 denotes a transmission member for transmitting the operation of the operation member 241 to the light shielding member drive mechanism 220 by the operation of the lock member 243. In the present embodiment, the transmission member 250 mechanically transmits the operation of the operation member 241 to the light shielding member driving member 220. However, the operation of the operation member 241 and the light shielding member driving member 220 are electrically linked to each other. Is also good.

Here, a procedure for loading the film cartridge 110 into the cartridge chamber 210 in the camera will be described.

1) The film cartridge 110 is inserted into the cartridge chamber 210 in the axial direction of the cartridge shaft 130.

2) The light blocking member opening / closing engaging portion 121 and the light blocking member driving portion 220 engaging member 221 are securely engaged with the film cartridge 110 and the cartridge shaft 1
30 to a position where the power transmission shaft 231 of the film drive motor 230 is securely engaged (hereinafter referred to as a normal position).

3) Close the cartridge chamber lid 240.
Thus, the film cartridge 110 is held at the regular position by the cartridge positioning member 242.

4) The operation member 241 is operated to the lock side. As a result, the lock member 243 engages with the lock member engaging portion 201, and the cartridge chamber lid 240 is locked in the closed state. At this time, the operation of the lock member 243 is transmitted to the light shielding member drive mechanism 220 via the transmission member 250, and the engagement member 221 rotates. As a result, the light shielding member opening / closing engagement portion 121 is driven to rotate, and the movable light shielding member 12
0 is opened, and the film feed port 115 is opened. At the same time as the movable light blocking member 120 is opened, the cartridge shaft 13
The zero rotation stop (not shown) is released.

5) The film drive motor 230 rotates the power transmission shaft 231 and the cartridge shaft 130 is driven to rotate. Thus, the automatic feeding of the film through the film feed port 115, that is, the auto loading operation is started.

Next, FIG. 4 shows a block diagram of an electric circuit of the camera configured as described above. Reference numeral 301 denotes a lid detection switch for detecting that the cartridge chamber lid 240 is locked in the closed state. The lid detection switch corresponds to a limit switch and the like, and is provided adjacent to the lock member engaging portion 201 in the camera body as shown in FIGS. The lid detection switch 301 is turned on by being pushed by the lock member 243 protruding into the lock member engaging portion 201, and outputs a detection signal (hereinafter, referred to as a FILMCL signal).

Reference numeral 302 denotes a cartridge detection switch for detecting that the film cartridge 110 is loaded in the cartridge chamber 210. The cartridge detection switch 302 corresponds to a limit switch and the like, and as shown in FIGS.
0 is provided at the bottom. The cartridge detection switch 302 is pressed by an axial end face (lower end face) of the film cartridge 110 loaded in the cartridge chamber 210 to be turned on, and outputs a detection signal (hereinafter referred to as a FILMIN signal).

Reference numeral 303 denotes a controller composed of a microcomputer or the like. This controller 30
In step 3, a failure in loading the film cartridge 110 is determined in accordance with the flowchart shown in FIG.

First, in step S101, FI
It is determined whether the LMCL signal has been input (ON). If the FILMCL signal is ON, it is determined that the cartridge chamber cover 240 is closed, and the process proceeds to step S105. If the FILMCL signal is off, it is determined that the cartridge chamber cover 240 is open, and the process proceeds to step S102.
Proceed to.

In step S102, FILMI
It is determined whether the N signal is input (ON). F
If the ILMIN signal is ON, it is determined that the film cartridge 110 is loaded in the cartridge chamber 210 of the camera, and the process proceeds to step S103. FILMIN
If the signal is off, it is determined that the film cartridge 110 is not loaded into the cartridge chamber 210 of the camera, or that the film cartridge 110 is loaded so that the cartridge detection switch 302 is not turned on. Return to the main routine.

In step S103, FILMC
It is determined whether the L signal is on. If the FILMCL signal is off, it is determined that the cartridge chamber cover 240 is open, and the process returns to the main routine of camera control. F
When the ILMCL signal is on, the cartridge chamber lid 2
It is determined that the shutter 40 is closed, it is determined that a normal film cartridge has been loaded, and the process proceeds to step S104.

In step S104, the process proceeds to a film auto-loading routine, in which an operation signal is sent to the film drive motor 230 to perform an auto-loading operation. In step S105, it is determined whether the FILMIN signal is on. When the FILMIN signal is on, the film cartridge 110 was initially loaded in a state where the FILMIN signal was not output from the cartridge detection switch 302, but was accidentally pushed into the normal position by closing the cartridge chamber lid 240, It is determined that it is not the normal position but it has been pushed to the position where the FILMIN signal is output, and the process proceeds to step S106. When the FILMIN signal is off,
It is determined that the film cartridge 110 is not loaded, and the process returns to the main routine of camera control.

In step S106, a warning signal is output, and the process returns to the camera control main routine. Here, the reason why the warning signal is output without performing auto-loading not only when the film cartridge 110 is not located at the regular position but also when the film cartridge 110 is located at the regular position after closing the cartridge chamber lid 240 is as follows. After the lid 240 is closed, the state of the film cartridge 110 in the cartridge chamber 210 cannot be seen from the outside, and there is no means for determining whether or not the film cartridge 110 is located at the proper position. This is because Thus, with a simple configuration using the two detection switches 301 and 302, it is possible to reliably prevent the automatic loading in a state where the cartridge 110 may not be located at the proper position. 305 shown in FIG. 4 is a warning indicator. Upon receiving a warning signal from the controller 303, the warning display 305 displays a warning display on a display unit or a viewfinder provided on the upper surface of the camera body or the like, which indicates that auto-loading is not possible due to improper loading of the film cartridge 110. Let it do. By looking at such a warning display, the user of the camera can know that the film cartridge 110 should be immediately reloaded.

Reference numeral 306 denotes a warning sound generator. Upon receiving a warning signal from the controller 303, the warning sound generator 306 generates a warning sound corresponding to the contents of the warning display from a sound generation unit provided in the camera. By hearing such a warning sound, the user of the camera can know the improper loading of the film cartridge 110 without looking at the display unit.

The present invention can be applied to a movable light-shielding door having a configuration other than the configuration described in the above embodiment or a configuration using a film cartridge having such a configuration. Further, the present invention can be applied to an image recording medium other than a film.

The present invention also relates to a cartridge of a type other than the film cartridge described in the above embodiment, a cartridge having an image recording medium other than film, and a cartridge other than a cartridge such as a cartridge or a battery. It can be applied to objects.

Further, the present invention may be used by combining the above embodiments and modified examples, or their technical elements as necessary.

Furthermore, the present invention relates to various types of cameras such as a single-lens reflex camera, a lens shutter camera, and a video camera, optical devices other than cameras, and other devices, and furthermore, these cameras, optical devices, and other devices. The present invention can also be applied to devices applied to the above or elements constituting them.

(Relationship Between Embodiments and Claims) The cartridge chamber cover 240 in this embodiment corresponds to a cover member in the claims. Further, the film drive motor 230 in the present embodiment constitutes a part of the film feeding means in the claims.

The lid detection switch 301 and the cartridge detection switch 302 in this embodiment correspond to a lid detection unit and a cartridge detection unit in the claims, respectively.

In this embodiment, the controller 303
It has a determination means and a control means in the claims.
Further, the warning display 305 and the warning sound generator 306 in the present embodiment correspond to warning means for issuing a warning in the claims.

The correspondence between the components of the present invention and the components of the embodiments has been described above. However, the present invention is not limited to the configurations of the embodiments, and the present invention is not limited thereto. Any configuration that can achieve the function of the configuration may be used.

[0045]

As described above, according to the first aspect of the present invention, after the lid detecting means detects that the lid member is closed, the cartridge detecting means detects that the cartridge is loaded in the cartridge chamber. Not in a state
When it is detected that the film cartridge has been detected, it is configured to judge whether or not the film cartridge is loaded improperly. For this reason, when the film cartridge is initially loaded at a position where detection by the cartridge detection unit is not performed, and is moved to a position where the detection is performed (a normal position or a position close to the normal position) after the lid member is closed. That is, when there is a possibility that the film cartridge is not loaded at the regular position, the loading failure can be determined. Therefore, if the operation of the film feeding means is restricted when the improper loading is determined, the overload operation of the film feeding means can be reliably avoided. Moreover, the first invention of the present application has a simple configuration using only the above-described two detection means, and is thus effective for making the camera compact.

The first invention of the present application is particularly useful for a camera using a film cartridge having a movable light shielding member. That is, since the film driving means operates only when the film cartridge is loaded in the regular position and the movable light shielding member is opened by the light shielding member driving means of the camera, the film feeding drive is performed while the movable light shielding member is closed. Can be reliably prevented, and an overload operation of the film feeding means can be avoided.

Further, the second invention of the present application is configured to give a warning when the loading failure of the film cartridge is determined. Therefore, when a film cartridge is loaded in the cartridge chamber and the film driving means does not operate even though the lid member is closed, the user is clearly informed that the cause is a possibility that the film cartridge is not properly loaded. be able to.

If a warning is displayed by using a mark or the like, the user can immediately recognize the improper loading of the film cartridge just by looking at the display.

If a warning is given by voice, the user can be notified of the improper loading of the film cartridge without looking at the warning display.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a film cartridge used in a camera according to a first embodiment of the present invention.

FIG. 2 is a sectional view showing a configuration around a cartridge chamber of the camera.

FIG. 3 is a perspective view showing a configuration around the cartridge chamber.

FIG. 4 is a block diagram showing an electric circuit of the camera.

FIG. 5 is a flowchart for determining a mounting failure of the camera.

[Explanation of symbols]

 Reference Signs List 110 film cartridge 120 movable light shielding member 121 light shielding member opening / closing engagement portion 130 cartridge shaft 200 camera 201 lock member engagement portion 202 lid detection switch 203 cartridge detection switch 210 cartridge chamber 220 light shielding member drive member 221 engagement member 230 film drive motor 231 Power transmission shaft 240 Cartridge chamber lid 241 Operation member 242 Cartridge positioning member 243 Lock member 250 Transmission member 260 Hinge shaft

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G03B 17/00-17/28

Claims (6)

(57) [Claims] 1. A cartridge chamber in which a film cartridge is loaded, a lid member for opening and closing a loading port of the cartridge chamber, and a film feeding device for driving a film after the film cartridge is loaded in the cartridge chamber. A cartridge detecting means for detecting that the film cartridge is loaded in the cartridge chamber; a lid detecting means for detecting that the lid member is closed; and After detecting that the lid member has been closed, when the cartridge detecting means changes from a state in which the loading of the film cartridge to the cartridge chamber is not detected, the state in which the film cartridge is detected. Determining means for determining a defective loading of the vehicle. Mela. 2. The film cartridge has a movable light-shielding member that opens and closes a film feed port of the cartridge so as to be able to shield light. The movable light-shielding member of the film cartridge loaded in the cartridge chamber is mounted on a camera body. 2. The camera according to claim 1, further comprising a light shielding member driving unit that opens the member. 3. The camera according to claim 1, further comprising control means for stopping the operation of the film feeding means when the judgment of the loading failure of the film cartridge is made by the judgment means. . 4. The camera according to claim 1, further comprising a warning unit that issues a warning when the determination unit determines that the film cartridge is loaded improperly. 5. The camera according to claim 4, wherein the warning unit issues a warning by displaying. 6. The camera according to claim 4, wherein the warning unit issues a warning by voice.