JPH10213837A - Cartridge information detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily read the information of the film of a loaded film cartridge by detecting the information of the film cartridge based on the position of an abutting member. SOLUTION: When the unexposed film cartridge 1 is loaded, the tip part 21a of the movable contact piece 21 of a detection switch 2 is brought into contact with a data disk 12 through the aperture 15 of the cartridge 1 and the piece 21 is pushed upward. When one part or the whole part of the cartridge 1 is exposed, the notch of the disk 12 is set at a position where it is opposed to the aperture 15 and the tip part 21a of the piece 21 is housed at the notched part so that it is not brought into contact with the disk 12. By detecting the position of the piece 21, the information of the cartridge 1 is detected. When a driver 31 interlocking with a light shielding door 13 is rotated, a follower member 41 is turned and the piece 21 is retreated from the disk 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cartridge information detecting device for reading information of a film cartridge loaded in a camera.

[0002]

2. Description of the Related Art In a so-called 135 film cartridge, there is known a technique of providing a metal pattern corresponding to the exposure sensitivity on a substantially cylindrical outer peripheral portion of a film cartridge in order to determine the exposure sensitivity of a film loaded in a camera. ing. When a film cartridge is loaded into a camera, the combination of continuity between a plurality of brushes provided so as to contact the film cartridge changes in accordance with the metal pattern.By detecting this combination, the exposure sensitivity of the film cartridge is increased. Can be determined.

On the other hand, the IX24 film (a so-called film for an advanced photo system) is provided with a claw for indicating whether or not development has been completed, and the development is already performed by detecting the presence or absence of the claw. You can judge whether or not it is. The film has a data disk that rotates integrally with the film reel, and records information such as film sensitivity using a barcode pattern formed on the surface of the data disk. The exposure, developed, or partially photographed state is shown.

When using an IX24 film, the presence or absence of claws of a loaded film cartridge is read or
Alternatively, the bar code of the data disk rotated by the photo reflector is scanned to read the information of the initial direction of the data disk and the bar code, thereby obtaining the information of the film.

[0005]

However, when an IX24 film is used, a photoreflector is required to read a barcode on a data disc. However, the photoreflector and the electronic circuit connected thereto are expensive. As a result, the cost of the camera increases. On the other hand, a relatively inexpensive camera does not need the information recorded in the barcode of the data disc, and it is sufficient to determine whether the cartridge has not been photographed or has been photographed to prevent double exposure. There is a need for an apparatus that determines whether or not a film has not been photographed while avoiding an increase in camera cost.

Although it is possible to determine whether the film has been developed based on the presence or absence of the nail, it is not possible to determine whether the film has been exposed or not. No information can be obtained.

An object of the present invention is to provide a cartridge information detecting device capable of easily reading information on a film in a film cartridge loaded in a camera.

[0008]

FIG. 1 shows an embodiment of the present invention.
Explaining in connection with No. 5, the invention according to claim 1 is:
The film cartridge 1 based on the position of the contact member 21 contacting the film cartridge 1 loaded in the camera.
The above-mentioned object is achieved by providing the detecting means 2 for detecting the above information and the retracting means 41 for retracting the contact member 21 from the film cartridge 1 after detecting the information. According to a second aspect of the present invention, in the cartridge information detecting device according to the first aspect, the retracting means 41 retracts the contact member 21 in conjunction with the opening and closing operation of the light shielding door 13 of the film cartridge 1. According to a third aspect of the present invention, in the cartridge information detecting device according to the first or second aspect, the detecting means 2 detects double exposure prevention information of the film cartridge 1. According to a fourth aspect of the present invention, in the cartridge information detecting device according to the third aspect, the contact member 21 is in contact with the data disk 12 of the film cartridge 1.

In the meantime, in the section of the means for solving the above-mentioned problem which explains the constitution of the present invention, the drawings of the embodiments of the present invention are used in order to make the present invention easy to understand. However, the present invention is not limited to this.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a cartridge information detecting device according to the present invention will be described below with reference to FIGS.

In FIG. 1, 1 is a film cartridge (IX24 film), 2 is a detection switch for detecting the loading of the film cartridge 1, and 3 is a cartridge chamber for storing the film cartridge 1 (a part for storing the film cartridge 1 in FIG. 1). ) Is a cartridge lid that opens and closes from the bottom side of the camera.

As shown in FIGS. 1 to 4, a film cartridge 1 has a film reel 11 for winding a film.
A bar code pattern (not shown) indicating film information is formed. The data disk 12 rotates integrally with the film reel 11, and a film entrance 1A (FIG. 4).
), And a joint portion 14 that rotates in conjunction with the opening and closing operation of the light shielding door 13 is provided.

The data disk 12 is partially cut out. In FIG. 2, the film cartridge 1
Although the data disk 12 is exposed from the opening 15 formed in FIG. 3, the exposed area of the data disk 12 is smaller than that of FIG. In the state of FIG. 3, it can be seen that the notch of the data disk 12 faces the opening 15. Similarly, paying attention to the opening 16 formed on the opposite side to the opening 15, the exposed area of the data disk 12 is smaller in the state of FIG. 2 than in the state of FIG.
In this state, it can be seen that the notch of the data disk 12 faces the opening 16.

The direction of rotation of the data disk 12 indicates double exposure prevention information, that is, whether or not the film is unexposed. In the cartridge information detecting device according to the present embodiment, as described later, the loaded film Cartridge 1
By detecting the rotation direction of the data disk 12, the state of the film is detected.

As shown in FIG. 1, the detection switch 2 is provided with a movable contact piece 21 for urging the distal end portion 21a downward by its own spring force and a movable contact piece 21 opposed thereto. A contact piece 22 for urging the contact portion 22a downward.
And a stopper pin 23 for restricting the downward movement of the contact portion 22a against the spring force of the contact piece 22. The movable contact piece 21 is pulled out by the terminal 21b, and the contact piece 22 is pulled out by the terminal 22b.

As shown in FIGS. 1 and 4, the cartridge lid 3 is mounted so as to be rotatable around a rotation shaft 3a provided along the bottom surface of the camera. A locking hole 3b is formed in the cartridge lid 3, and the opening of the cartridge lid 3 is prohibited by inserting a locking member 4 slidably attached into the locking hole 3b. 1 and 4, the cartridge lid 3 is in the closed position.

In FIG. 1, reference numeral 31 denotes a joint 14
(See FIGS. 2 and 3), which is a substantially cylindrical driver which is fitted and rotated. A conductor pattern 31a is provided on the outer periphery of the driver 31, and a cam 31b is provided on the lower portion of the driver 31 (the side closer to the joint portion 14). Are formed respectively. 3
Reference numeral 2 denotes a direction detection switch that detects the direction of the joint 14 by contacting the conductor pattern 31a of the driver 31.

In FIG. 1, 41 is a follower member provided so as to be able to contact the cam 31b of the driver 31, 42 is a shaft member joined to the follower member 41 at one end, and 43 is a shaft member at the other end of the shaft member 42. The joined rotary arm 44 is rotatably provided in contact with the rotary arm 43 and is a lock lever that locks the cartridge lid 3.
The follower member 41 has a cam follower 41a at an end portion which comes into contact with the cam 31, and a cam follower 41a.
Lift cams 41b each having an inclined surface acting as a cam surface are formed at the other end portion opposite to a.

The lock lever 44 is urged clockwise by a spring (not shown), and the urging force is transmitted through the rotating arm 43 and the shaft member 42. Therefore, the follower member 41 is counterclockwise urged. An urging force is acting. For this reason, the cam follower 4 of the follower member 41
1a is always in contact with the cam 31b of the driver 31.
The follower member 41, the shaft member 42, the lock lever rotating arm 43, and the lock lever 44 constitute an interlocking mechanism 40. The interlocking mechanism 40 controls the locking of the cartridge lid 3 in conjunction with the rotation of the driver 31.

The operation of the cartridge information detecting device according to the present embodiment configured as described above will now be described.

FIG. 2 shows an unphotographed film cartridge 1.
Has been loaded into the camera C. As described above, it is possible to determine whether or not the film cartridge 1 is unexposed based on the direction of the rotation direction of the data disk 12, and as shown in FIG. When the data disk 12 is facing, the film cartridge 1 has not been exposed.

When the unexposed film cartridge 1 is loaded from the bottom of the camera C, the tip 21a of the movable contact piece 21 of the detection switch 2 is moved through the opening 15 of the film cartridge 1 as shown in FIG. 12, and the movable contact piece 21 is pushed upward in FIG. 2 against its spring force. As a result, the movable contact piece 21 comes into contact with the contact portion 22a of the contact piece 22, so that the movable contact piece 21 and the contact piece 22 are electrically connected to each other. 2), a contact state is detected. The loaded film cartridge 1 is fixed at a predetermined position by closing the cartridge lid 3.

As described above, when the unexposed film cartridge 1 is loaded, the data disk 1 is inserted into the opening 15.
The fact that the two notches do not face each other is recognized through the position of the movable contact piece 21, and it can be determined that the loaded film cartridge is unexposed. The determination result is stored in a storage device (not shown), and the information is used for controlling the operation of the camera.

Next, the loaded film cartridge 1
In the case where is a film cartridge other than an unexposed film cartridge (partially exposed and fully exposed), the operation will be described with reference to FIG.

In this case, as shown in FIG. 3, the notch of the data disk 12 is located at a position facing the opening 15, and the tip of the movable contact piece 21 is housed in the notch and does not contact the data disk 12. Therefore, the movable contact piece 21 is not pushed up as shown in FIG. 2, and the movable contact piece 21 and the contact piece 22 do not come into contact with each other. The control unit of the camera C detects that the movable contact piece 21 and the contact piece 22 are not in contact with each other.
Are not unexposed.

Regardless of whether the loaded film cartridge 1 is unexposed or exposed, the film is fed while the tip of the movable contact piece 21 enters the inside of the film cartridge 1 through the opening 15. And the rotating data disk 12 comes into contact with the movable contact piece 21,
In the apparatus of the present embodiment, the movable contact piece 21 is pushed upward before the film is fed. Hereinafter, the operation of retracting the movable contact piece 21 will be described.

FIG. 1 shows a state immediately after the film cartridge 1 is loaded in the camera, and the light-shielding door 13 is in a closed position. At this time, since the cam follower 41a of the follower member 41 is in contact with the lower position of the cam 31b of the driver 31, the follower member 41 is in a state rotated counterclockwise, and the lift cam 41b is is seperated.

FIG. 4 shows a state in which the locking member 4 is inserted into the locking hole 3b of the cartridge lid 3, and the light shielding door 13 is further opened. From the state of FIG. 1, the driver 31 fitted to the joint 14 interlocking with the light shielding door 13 is rotated clockwise, whereby the light shielding door 13 reaches the open position. The determination as to whether the film has not been exposed is made immediately after the cartridge cover 3 is locked by operating the locking member 4 from the state shown in FIG.

As shown in FIGS. 1 and 4, the driver 3
When 1 is rotated, the cam follower 41a is pushed by the cam 31b, and the follower member 41 rotates clockwise. The rotation of the follower member 41 is transmitted to the rotation arm 43 via the shaft member 42, and the lock lever 44 rotates counterclockwise with the rotation of the rotation arm 43 in the clockwise direction. As shown in FIG. 4, the lock lever 44 enters the notch 4a of the locking member 4, so that the sliding of the locking member 4 is prohibited. Therefore, there is no possibility that the cartridge lid 3 is opened carelessly.

1 and 4, the rotation of the follower member 41 causes the lift cam 41b to move below the movable contact piece 21 of the detection switch 2. At this time, with the rotation of the follower member 41, the movable contact piece 21 (and the contact piece 2
2) is pushed upward, so that the movable contact piece 21 is retracted from the data disk 12. Therefore, the movable contact piece 21 does not hinder the rotation of the data disk 12 when the film is fed, and the film cartridge 1 opened by the light shielding door
The film can be smoothly fed (thrusted) from the opening 1A.

In the apparatus of this embodiment, the movable contact 21 is brought into contact with the data disk 12 and the movable contact 2
Since the information of the film cartridge 1 is detected by detecting the position of the information No. 1, the information can be easily detected.

In this embodiment, the detection switch 2 having the two contact pieces 21 and 22 is used. However, a micro switch or the like may be used to retract the contact.

In the present embodiment, the retreat of the movable contact piece 21 is performed in conjunction with the opening operation of the light shielding door 13.
May be evacuated without interlocking with the operation of.

In this embodiment, the cartridge lid 3 is locked in conjunction with the opening operation of the light shielding door 13 and the movable contact piece 21 is retracted at the same time, but the contact member (movable contact piece) is not necessarily required. It is not necessary to link the evacuation with the locking of the cartridge lid 3. For example, a configuration as shown in FIG. 5 can be adopted.

In FIG. 5, the cartridge lid 103 is attached so as to be rotatable around a rotation shaft 103a provided along the bottom surface of the camera C. A locking hole 103b is formed in the cartridge lid 103, and opening of the cartridge lid 103 is prohibited by inserting a slidably mounted locking member 104 into the locking hole 103b. 105
Is an urging spring for urging the locking member 104 in the direction of the cartridge lid 103. Although a mechanism for retracting the contact piece 21 is omitted in FIG. 5, a mechanism including, for example, the driver 31 and the follower member 41 in FIG. 1 may be provided.

In the description of the embodiment and the claims, the movable contact piece 21 corresponds to the contact member, the detection switch 2 corresponds to the detecting means, and the follower member 41 corresponds to the retracting means.

[0037]

According to the present invention, since the information of the film cartridge is detected based on the position of the contact member, the information of the film cartridge can be easily detected. In addition, since the retracting means for retracting the contact member from the film cartridge is provided, the operation of the camera is not hindered.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a cartridge information detecting device according to the present invention.

FIG. 2 is a perspective view showing a state of the cartridge information detecting device of the present embodiment when an unexposed film cartridge is loaded.

FIG. 3 is a perspective view showing a state of the cartridge information detecting device of the present embodiment when an exposed film cartridge is loaded.

FIG. 4 is a perspective view showing a state of the cartridge information detecting device according to the present embodiment after a light shielding door is opened.

FIG. 5 is a diagram showing another example of the cartridge lid.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Film cartridge 2 Detection switch 13 Light shielding door 21 Movable contact piece 41 Follower member

Claims (4)

[Claims] A detecting means for detecting information on the film cartridge based on a position of a contact member which is in contact with a film cartridge loaded in a camera; and detecting the information on the film cartridge after detecting the information. A cartridge information detecting device, comprising: a retracting unit for retracting the cartridge information from the cartridge. 2. The cartridge information detecting device according to claim 1, wherein said retracting means retracts said contact member in conjunction with an opening and closing operation of a light shielding door of said film cartridge. 3. The cartridge information detecting device according to claim 1, wherein said detecting means detects double exposure prevention information of said film cartridge. 4. The cartridge information detecting device according to claim 3, wherein said contact member comes into contact with a data disk of said film cartridge.