JPH061324B2 - Film information reader - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a film cartridge having an electric contact for transmitting information such as the number of shots of a film and sensitivity on the outer surface of the patrone, when the camera is loaded with the information by the electric contact. The present invention relates to a film information reading device for reading.

2. Description of the Related Art When a film is loaded in a conventional camera, it is necessary to set an exposure meter and an automatic exposure device of the camera according to the sensitivity of the film, and to store the number of shots of the film. However, in recent years, as shown in Fig. 1 from the Eastman Kodak Company of the United States, the outer surface of the film cartridge (1) has 12
A film has been put on the market, which has one electric contact (1a) (camera auto-sensing code, hereafter referred to as CAS code) and can transmit information on the film sensitivity, the number of shots, and the allowable exposure range to the camera. The use of the film eliminates the above-mentioned trouble. In order to read the film information with this CAS code, it is necessary to install a reading device having a contact corresponding to the CAS code in the camera's cartridge room. By the way, as shown in FIG. 1 (B), the film cartridge has a lid (1
b) has a larger diameter than the portion of the CAS code to which the contact (1a) is attached, and the contact on the camera side needs to protrude from the wall of the Patrone chamber by at least this difference (h) in diameter.

On the other hand, looking at the camera's film cartridge room,
As shown in FIG. 2, a rewinding fork (13) is installed. This fork (13) protrudes into the film cartridge chamber to engage with the key formed on the shaft of the loaded cartridge, so that it will not interfere with the removal of the film together with the rewind knob (14). Many are configured to be retracted upwards. However, to retract the fork (13) upwards, the camera body (1
Since an extra space is required in the upper part (11a) of 1) to accommodate the retracted fork (13), there is also a structure in which the fork does not retract in order to effectively use this space. . Also, many automatic rewind cameras do not retract their forks. In that case, the film cartridge is loaded with the movement of the cartridge shaft in the extension direction. That is, as shown by the arrow A in the figure, the cartridge moves from the rear lower part to the diagonal upper part.

If the information reading device for the CAS code is installed in such a camera, the corner of the tip of the film cartridge inserted at an angle is caught by the contact point of the reading device (protruding as described above), and the loading cannot be performed smoothly. Will end up. In order to eliminate this inconvenience, it is conceivable that the contacts can be moved so that when the corners of the cartridge come into contact with each other, they retract. However, such a configuration is possible only when the protrusion amount of the contact is extremely small, and when the protrusion amount becomes large to some extent, the corner of the cartridge comes into contact with the contact from the lateral direction, and the contact is retracted. Can't do it. Actually, the amount of protrusion of the contact is required to be about 1.5 mm to 2 mm in order to ensure the electrical connection, and the structure as described above cannot prevent the cartridge from being caught.

Aim of the present invention is to provide an electric contact for information transmission on the outer surface of a camera which must be accompanied by movement of the film cartridge in the extension direction when the film cartridge is loaded due to the fact that the film rewinding fork does not retract. A contact for reading information is provided by contacting this electric contact when the film cartridge is loaded, and this contact is configured to be surely connected to the contact of the film cartridge and configured not to hinder the loading of the film cartridge. The purpose is to obtain a film information reader.

In summary, in the present invention, an opening is formed on the wall of the film cartridge chamber of the camera so as to open toward the film cartridge chamber, and a table member is arranged in the opening portion, and the table member has a protrusion amount into the film cartridge chamber. It is movable to change.

Further, an opening portion that opens toward the inside of the patrone chamber is also formed in this base member, and an electric contact member for transmitting an electric signal to the camera via the transmission member is movably installed in the patrone chamber. It is designed to be movable so that the amount of protrusion to is changed.

Further, a biasing means for urging the electric contact member and the base member in a direction in which the electric contact member and the base member are projected into the chamber is provided, and the film patrone is caught on the electric contact member by reducing the amount of projection from the base member to the electric contact member. It also enables reliable signal transmission.

Embodiments Embodiments of the present invention will be described with reference to the accompanying drawings.
3 to 7 show a first embodiment of the present invention,
As the film cartridge, the one with the CAS code shown in FIG. 1 (A) is used. FIG. 3 is a rear view of the camera with the back cover removed. Camera body (11)
A film cartridge chamber (12) is provided on the left side, a sprocket (17) and a spool (18) are provided on the right side, and an exposure opening (16) is formed between them. Film Patrone Room (12)
The film pulled out from the film cartridge loaded in is passed along the guide rail (15) in front of the exposure opening (rear of the camera), and is wound up by the sprocket (17) and wound up on the peripheral body of the spool (18). It is configured. A fork (13) is installed in the film cartridge room (12). The fork (13) is for rewinding the loaded film after the photographing is finished, and is engaged with a key formed on the shaft of the film cartridge. Fork base
(13a) and claws (13b), the claws (13b) are urged downward and can be retracted into the base (13a) against the urging force. Since the automatic rewinding device, the electric circuit board and the like are installed above and there is no space for the fork to enter, the base portion (13a) cannot be retracted into the camera body (11). Claw (13
The reason b) is movable is that the key and the claw portion (13b) are not always correctly engaged at the beginning of loading the film cartridge, and in that case, the claw portion (13b) is retracted, and slightly. When the film is fed and the key and the claw portion (13b) face each other accurately, the key and the claw portion (13b) engage with each other. The base of the fork
Since (13a) does not retreat, the film cartridge cannot be loaded at a right angle to the axis of the cartridge, i.e., from the rear of the camera to the front, and it must be loaded from the lower rear of the camera to the upper diagonal front. I won't. In order to facilitate this loading operation, the lower part (11
b) is U-shaped as shown in FIG.

In the film cartridge chamber (12), a frame body (21) which itself constitutes a part of the wall of the cartridge chamber, a base material (22) which slides in an opening (21a) formed in the frame body, and A contact pin (23) that slides in an opening (22a) formed in the base material (22) is installed. These will be described in detail with reference to FIGS. 4 and 6. 4 and 5 are cross-sectional views of the camera taken along a horizontal plane. FIG. 4 is a state in which the back cover is closed without the film cartridge being loaded, and FIG. 5 is a partially enlarged view when the film cartridge is loaded. . Further, FIG. 6 shows a state in which the camera is cut in the vertical direction and the film cartridge is not loaded.

The camera body (11) is formed by integrally molding plastic and metal, and the periphery of the exposure opening (16), which requires strength, is made of metal, and the other part is made of plastic material. The wall of the cartridge chamber forming the film cartridge chamber (12) is a front wall and the left end side wall of the camera is a plastic wall (11c), and the center side wall of the camera is a metal wall (11d). A rectangular opening (11e) that is long in the vertical direction of the camera is formed at a position near the center of the camera on the front side of the camera on the wall of the cartridge chamber. Inside the opening (11e), a frame body (21) which itself constitutes a part of the wall of the Patrone chamber is fixed. The frame (2
In 1), the rectangular opening (21
a) has been formed. The opening (21a) has a narrow width on the inner side of the film cartridge and a wide width on the outer side of the film cartridge, and a step surface (21b) is formed between them.

In the narrow part of the opening (21a), a base material (2
2) is fitted so as to be slidable in the extension direction of the opening (21a). The base material (22) has a long shape in the vertical direction, that is, along the longitudinal direction of the cartridge chamber, and has a plurality of circular openings (22a) extending along the sliding direction of itself. Base material
The film patrone (22) has a brim portion (22b) that spreads laterally outward at the outdoor side end portion, and a second brim portion (22c) that expands radially inward of the opening (22a) at the lateral end portion of the film cartridge interior side.
Are formed. The openings (22a) are formed at six places along the vertical direction of the camera as shown in FIG.

A contact pin (23) made of a conductive material is slidably fitted in each opening (22a) of the base material (22). The contact pin (23)
The film patrone is thicker on the outside of the film and thinner on the inside of the patrone, with a step (23b) between them.
Are formed. Of the contact pins (23), the leading end of the film cartridge inside the room has a gentle and smooth convex curved surface.

The base material (22) and the contact pin (23) are fitted into the openings (21a) and (22a) from the outside of the film cartridge to the inside, respectively,
Holding member (26) by sandwiching the spring (24) and flexible substrate (25)
It is held irremovably by. The spring (24) has a contact pin (2
3) is urged toward the inside of the cartridge, and the contact pin (2
The base material (22) is urged via 3). In the assembled state, the base material (22) from the frame body (21), the contact pins (23) project from the base material (22) to the inside of the patrone, and the step surface (21b) of the frame body (21). ) And the brim portion (22b) of the base material (22) and the second brim portion (22c) of the base material (22) and the contact pin (23)
The protrusion amount is restricted by the engagement with the step surface (23b). The protrusion of the contact pin (23) from the base material (22) is slight. The spring (24) is made of a conductive material, one end of which is a contact pin (23) and the other end of which is a flexible substrate (25).
The two are connected by being in contact with the conductive pattern formed above. One contact pin (23) is provided in each opening (22a), and six contact pins (23) are installed as a whole.

A part of the flexible substrate (25) and the pressing member (26) are extended to form a metal wall (11d) of the film cartridge chamber wall.
It is fastened with screws (27). The circuit pattern on the flexible board (25) includes a grounding conductive pattern.This grounding conductive pattern is extended to the fixing part with the screw (27) and pressed against the metal wall (11d) with the screw (27). And is electrically connected. This is due to the following reasons.

In other words, in a camera body made of a hybrid of plastic and metal, if the metal part is not electrically connected to other parts at all, various kinds of electrical noise will occur in the vicinity of the camera. The potential of the metal portion fluctuates, which adversely affects the operation of the circuit inside the camera, which may cause the circuit to stop working or malfunction. If the metal portion is connected to the ground wire or the low impedance wire of the circuit installed in the vicinity of the metal portion as in the present embodiment, the potential of the metal portion does not fluctuate and is always electrically stable. The above-mentioned inconvenience does not occur.

The ground conductive pattern of the flexible substrate (25) and the metal wall (11d) may be electrically connected by soldering instead of screwing, or may be connected via a lead wire. Also,
The flexible board (25) may be caulked and fixed to the metal wall (11d) to be electrically connected.

In this embodiment, the film information reading device has a metal wall (1
Since it is installed very close to 1d), the ground conductive pattern can be made extremely long for the above ground connection,
Also, there is no need to connect with long lead wires. Therefore, the advantages such as the ease of assembling which are caused by the unitization of the film information reading device are not impaired.

Next, the operation when the film cartridge is loaded in this embodiment will be described. FIG. 6 shows a state in which the film cartridge chamber is not loaded, and shows a main part of a surface obtained by cutting the film cartridge chamber in the vertical direction. At this time, both the base material (22) and the contact pin (23) are located at the most projecting position toward the inside of the film cartridge. From this state, the film cartridge (1) is loaded. The corner of the tip of the film patrone (1) is the base material (22) first.
Contacting the base plate (22) and contact pin (23) against the biasing force of the spring (24) by pushing the film cartridge.
Are pushed together. After that, the corner of the film cartridge slides on the base material (22) and the contact pin (23) as shown in FIG.
Abut. The amount of protrusion of the contact pin (23) with respect to the base material (23) is small as already described, and since the tip of the contact pin (23) is formed into a gentle convex curved surface, the film cartridge (1) The tip smoothly rides on the contact pin (23), and the contact pin (23) is pushed into the base material (22). When the tip angle of the film cartridge (1) first contacts the contact pin (23), the contact pin (23) is pushed against the biasing force of the spring (24), and then the base material (22) is It is pushed in by the tip angle of the film cartridge.

As the film cartridge (1) was pushed in, the tip angle successively pushed over the contact pins (23) while pushing them over, and the key (1) formed on the film cartridge (1) as shown in FIG. 8 was pressed.
The c) and the fork (13) in the film cartridge chamber can be engaged with each other, and the film cartridge (1) is completely loaded in the film cartridge chamber. 5th in this state
As shown in Fig. 8 and Fig. 8, the base material (22) is almost in contact with the peripheral surface of the film cartridge (1), and the contact pin (23) is connected to the spring (2
Due to the urging force of 4), the tip is C on the film cartridge (1).
It is pressed into the AS cord contact (1a) and electrically connected. At this time, since the film patrone (1) may have some warpage or unevenness on the peripheral surface, the base material does not always completely adhere to the film patrone, but each contact pin (23) is attached to each spring. Energizing force of (24) ensures contact of CAS cord (1a)
Press against. According to the contact pattern on the film cartridge, each contact pin transmits, for example, the film sensitivity to the circuit on the flexible board (25) via the spring (24) which also functions as a transmission member, and the information is used for automatic exposure of the camera. To be done.

When taking out the film cartridge (1), first of all, the brim-shaped protruding part of the lid (1b) of the film cartridge (1) rides on the base material (22), and then climbs on the tips of the contact pins (23) one after another. Yuki, the removal is completed. Note that the base (22) is largely pushed in at the time of removal, and the corners of the base are formed into smooth curved surfaces, so the lid (1b)
The operation of the protruding portion of the vehicle running on the base material (22) is smoothly performed.

FIG. 9 and FIG. 10 show another embodiment of the present invention. Among the six contact pins (23) installed as in the first embodiment, only three of the contact pins near the top of the camera have the same structure as in the first embodiment. The three near the bottom are installed directly on the wall of the film cartridge, not on the base material. In this embodiment, as shown in FIG. 10, the contact pins (23 ') in the lower half are largely projected, but the tip corners of the film cartridge come into contact with each other when the film cartridge is inserted and removed as shown in FIG. In general, the pins are installed near the upper part of the film cartridge chamber, and there is substantially no problem even if the present invention is not applied to the lower pins.

FIG. 11 shows still another embodiment, in which the contact pins (23) are installed in two rows with six rows in each row. In this embodiment, all the contact points of the CAS cord formed at 12 places in total. Electrically connected with. Therefore, all the information such as the film sensitivity information, the number of shots information, and the exposure allowable range information can be read.

Although the embodiment of the present invention has been described above, the number of contact pins is arbitrarily determined according to the information to be read. Also,
The transmission member may be provided separately without being combined with the urging means. Further, the electric contact member may have a ball-like shape instead of a pin.

Effect As described above, in the present invention, an opening extending in the radial direction of the cartridge is formed in the film cartridge chamber wall of the camera, and a base member is installed in the opening so that the base member projects into the film cartridge chamber. Between the projecting position and the retracted position, an opening is also formed in the base member, and an electric contact member is installed in the opening so that the electric contact member is provided between the projecting position and the retracted position. A urging means for urging the base member and the electric contact in the projecting direction is provided so as to be displaceable between them. As a result, the film rewinding fork provided in the film patrone chamber does not retreat, and the film patrone loading operation is accompanied by movement in the patrone axis extension direction. When a contact for reading information from a film cartridge attached with a contact for transmitting information such as the allowable range is provided, the protrusion amount of the electric contact itself is reduced to prevent the film cartridge from being caught, and the base member is It is possible to obtain a film information reading device capable of surely connecting by increasing the entire protruding amount including the film information and reading the film information surely through the transmission member.

[Brief description of drawings]

FIG. 1 (A) is a perspective view of a film cartridge having contacts on its outer surface, FIG. 1 (B) is a side view of the same film cartridge, and FIG. 2 is a partial rear view showing a conventional camera, FIG. Is a rear view showing the first embodiment of the present invention, FIGS. 4 and 5 are lateral cross-sectional views of the essential part of the same embodiment, and FIGS. 6 to 8 are operation explanatory views of the same embodiment, and FIG. Is a rear view showing a second embodiment of the present invention, FIG. 10 is a longitudinal sectional view of an essential part of the same embodiment, and FIG. 11 is a rear view showing a third embodiment of the present invention. 1 ………… Film cartridge, 1a ………… Electric contact, 11
……… Camera, 11c, 11d, 21… Film patrone room wall,
12 ……… Film cartridge room, 21a ……… opening, 22…
…… Base member, 22a ……… Opening, 23 ……… Electrical contact member, 2
4 ………… Biasing means, 24 ………… Transmission member.

Claims (5)

[Claims] Claims: 1. A film patrone having an electric contact for transmitting information of a film on an outer surface thereof, has a contact electrically connected to the electric contact when the film patrone is loaded, and an extension direction of a patrone shaft in a loading operation of the film patrone. In a camera involving movement of a film cartridge to a film cartridge, a first opening formed in a wall of the film cartridge chamber and opening toward the film cartridge chamber, and a movably installed inside the first opening, the film cartridge A base member that is movable so that the amount of protrusion into the room changes and that has a second opening that opens toward the interior of the cartridge, and a movably installed inside the second opening that protrudes into the interior of the cartridge. An electric contact member that is movable so that the amount changes, and a direction in which the electric contact member and the base member project into the cartridge chamber A film information reading apparatus, comprising: a biasing means for biasing the electric contact means and a transmission member for electrically connecting the electrical contact means and the electrical means of the camera. 2. The film information reading device according to claim 1, wherein the electric contact member has a convex curved surface at a protruding portion when the electric contact member is most protruded from the base member. 3. The film information reading apparatus according to claim 1, wherein the urging means is made of a conductive material and doubles as a transmission member. 4. The second opening and the electric contact members are provided in the same number as the electric contacts formed on the film cartridge.
The film information reading device according to any one of items. 5. The second opening and the number of electric contact members are smaller than the number of electric contacts formed on the film cartridge, and the electric contact members are provided so as to contact only a part of the electric contacts. The film information reader according to any one of claims 1 to 3.