JP2979168B2 - Film information reader - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film information reading device. More specifically, when a film patrone having an electric signal pattern for transmitting information about the film to the camera is mounted on the camera, the information is transmitted to read information analysis means provided in the camera. It concerns the device.

[0002]

2. Description of the Related Art In recent years, a film cartridge having an electric signal pattern on an outer surface for transmitting information about a film to a camera has been used. When such a film cartridge is loaded in a camera, information is read. A film information reading device for transmitting the information to a reading information analyzing unit installed in a camera has been developed. Such devices include, for example, Japanese Utility Model Laid-Open No. 1-155031 and
162419. 1-1-1550
A conventional example 31 will be described with reference to FIGS. 6 and 7 are cross-sectional views of a conventional example. The film information reading device is a film cartridge room 4 of the camera body 2.
Cover 11, electric contact 10, spring 1 provided on the wall
3, the circuit board 14 and the fixing plate 15.
The cover 11 forms a part of the wall of the film cartridge chamber 4 and is open to the film cartridge chamber 4, and is provided with six openings 11a into which the six electrical contacts 10 are fitted one by one. . The six electrical contacts 10 are made of an electrically insulating material and insulate the six electrical contacts 10 from each other. The fixing plate 15 is the circuit board 1
4 is supported, forms an outer shell with the cover 11, and is fixed to the camera body 2 with screws 16. The electric contact 10 has a hat-like shape having a flange, and is formed of a conductive material.
The hat-shaped head is inserted into and protrudes from the opening 11a formed in the cover 11 into the film cartridge chamber 4, and when the film cartridge 3 is not loaded, the spring 13 is used.
The projection is restricted by the cover 11 at the flange portion. When the film cartridge 3 is loaded, it retreats and the amount of protrusion decreases. Retraction is restricted in the direction of the fixed plate 15 by the bias of the spring 13. Spring 13
Is a coil spring, which is formed of a conductive material. One end presses the electric contact 10 and the other end presses the circuit board 14 fixed to the fixing plate 15 by urging. The circuit board 14 is a flexible printed circuit board fixed to a fixing plate 15, and contacts the electrical contacts 10 to read film sensitivity and other film information by a signal based on the presence or absence of conduction by the DX code and transmit it to the CPU of the camera body. .

According to Japanese Utility Model Laid-Open Publication No. 63-162419, the spring 13 is a coil spring formed of a conductive material, and a plurality of springs are used for one electrical contact 10 to stabilize the holding and electrical connection. It is trying to make it. At one end, the electrical contact 10 penetrates a hole provided in a holding member (not shown) supported by the fixed plate 15 at the other end, and fits into a side surface of the hole, and the circuit board 14 on the fixed plate 15 is attached. Pressing is performed by urging, and electrical connection is established.

[0004]

The prior art of this type has the following problems. In the technique disclosed in Japanese Utility Model Laid-Open Publication No. 1-155031, since the position and orientation of the spring are only given by engagement with the concave portion of the contact portion, the spring is not stabilized when the spring bends and expands due to advance and retreat of the electrical contact. May deviate from the normal state in position or posture, and malfunction may occur due to an obstacle such as a part of a spring entering a gap between the cover and the electrical contact at the opening of the cover. Further, when assembling the apparatus into the camera body, the fixing operation is not easily performed due to lack of positioning for disposing the fixing portion at a stable position and posture with respect to the camera body. Further, there is a disadvantage that the size of the device becomes large to accommodate the biased spring.

In the technique disclosed in Japanese Utility Model Laid-Open Publication No. 63-162419, the position and posture of the electrical contact which advances and retreats by the urging of the spring and the pressing of the loaded film cartridge are changed from the normal state due to the instability of the position and posture of the spring. In some cases, malfunctions were caused by obstacles such as separation and inclination at the opening. Further, when the spring buckles, the connection between the spring and the circuit board electrical connection board on the flexible printed circuit board side may become unstable, or the spring may be disconnected and become non-conductive.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and provides an apparatus which stabilizes the position and attitude of a spring so that malfunction does not occur, and which can be easily incorporated into a camera body at a low cost. It is intended to provide a simple device.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, according to the present invention, when a film cartridge having a plurality of electric signal patterns for transmitting information about a film on an outer surface thereof is loaded, the electric signal pattern is formed. reading,
In the camera film information reading device provided on the wall surface of the film cartridge room of the camera, a projecting position protruding from the wall surface of the film cartridge room of the camera toward the film cartridge room side, and a retracted position retracted in the film cartridge room outside direction. A plurality of electrical contact members which can be displaced between the film cartridges and which come into contact with an electrical signal pattern of the film cartridge when the film cartridge is loaded into the film cartridge, and an electrical signal obtained at the electrical contact members is taken by a camera. A flexible printed circuit board for electrically transmitting the electric circuit to the plurality of electric contact members and the conductive lands of the flexible printed circuit board. And electrically urges the electrical contact member toward the protruding position. And an electric contact member, the electric contact member, the urging means and the flexible printed circuit board are integrally incorporated, and a fixing member constituting a unit case and a lid member thereof are provided. A projection is provided to project in a direction in which the electrical contact member projects to support the contact member, and penetrate a hole formed in a conductive land of the flexible printed board so as to fix the flexible printed board in a predetermined position. Thus, a film information reading apparatus is constituted.

[0008]

The projection 17 is provided on the fixing member 15 by projection.
Engages and fixes the circuit board 14 to the fixing member 15 at a predetermined position. The projection 17 provided on the fixing member 15 engages the urging means 13 with the fixing member 15 at a predetermined position, and is stable even if the urging means 13 bends and stretches with respect to the fixing member 15. Is movably held at the position and the posture. The protrusion 17 can be formed integrally with the fixing member 15 without increasing the size of the device. The lid member 11 has elasticity and fits with the fixing member 15.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A camera provided with an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a conceptual configuration diagram viewed from the rear of the camera installed in this embodiment. The camera 1 has a film cartridge chamber 4 for loading and storing a film cartridge 3 in a camera body 2, an exposure opening 5, and a spool 9. Also, a film rewinding shaft 7, a sprocket 8,
A spool 9 and a plurality of electrical contacts 10 are installed and configured. The plurality of electrical contacts 10 are in the film cartridge room 4.
Protruding from the opening 11a provided in the opening. Normal D
In the X code, the number of electrical contacts 10 is six,
Therefore, the number of openings 11a is also six. A plurality of electrical contacts 10 contact the DX code formed by printing the film information reading device on the outer peripheral surface of the film cartridge 3 loaded and stored in the film cartridge chamber 4 by the film information reading device, and the DX code The film sensitivity and other film information are read by a signal based on the presence / absence of conduction by the camera and transmitted to the CPU of the camera body.

One embodiment of the present invention will be described with reference to FIGS. 2 and 3 are sectional views of the present embodiment.
4 and 5 are sectional views of another embodiment of the present invention.
The film information reading device includes a cover 11 provided on a wall of a film patrone room 4 of the camera body 2 and an electric contact 1.
0, a spring 13, a circuit board 14, and a fixing plate 15. The cover 11 forms a part of the wall of the film patrone chamber 4 and opens into the film patrone chamber 4.
Openings 1 into which the electrical contacts 10 fit one by one
1a is provided. It is composed of electric insulating material 6
The electrical contacts 10 are insulated from each other. The fixing plate 15 is provided with a projection 11b that engages with the hole 15b, and is made of an elastic material and engages with the elasticity. The fixing plate 15 holds the circuit board 14, forms an outer shell with the cover 11, and is fixed to the camera body 2 with screws 16. The fixed plate 15 is provided with a projection 17 that engages with the coil spring core of the spring 13.

The protruding portion 17 has a columnar shape with a thin tip, and is provided substantially perpendicular to the main portion of the fixed plate 15. The thickness is a thickness that can be engaged in the coil spring core of the spring 13. The length is such that when the electrical contact 10 retreats and its head 10c comes into contact with the film patrone 3 at the wall of the film patrone chamber 4, it comes into contact with the inside of the head 10c and the flange 10d does not contact the fixing plate 15. Is the length of The root of the cylinder penetrates a hole (not shown) formed in the circuit board 14, so that one end of the spring 13 is stably brought into contact with and electrically connected to the circuit board 14 at the root. The tip of the cylinder is slightly thinner,
The spring 13 can be easily assembled and mounted. However, the head 1 of the electrical contact 10 is not sharp and sharp.
No damage to 0c.

The electric contact 10 has a hat-like shape having a flange and is formed of a conductive material. A hat-shaped head is fitted into and protrudes from the opening 11a formed in the cover 11 into the patrone chamber 4, and when the film patrone 3 is not loaded, the head is urged by the spring 13 to protrude. 11, the protrusion is limited. When the film cartridge 3 is loaded, it retreats and the amount of protrusion decreases. In the direction of the fixing plate 15 at the flange or the fixing plate 15
Is restricted from retreating by a projection 17 provided on the front side.
The spring 13 is a coil spring and is formed of a conductive material. One end presses the electrical contact 10 and the other end presses the circuit board 14 against the fixed plate 15 by urging. Projection portion 17 provided on fixed plate 15 at the hollow core of the coil spring
Are loosely fitted. The circuit board 14 forms a flexible board pressed by the fixing plate 15, and contacts the spring 13 on the surface of the flexible board on the side of the electrical contact 10 to electrically connect the electrical contact 10 and the circuit board 14. The conductive land (not shown) has a hole (not shown) through which the projection member 17 passes. The circuit board 14 further transmits film sensitivity and other film information to the CPU of the camera body by a signal based on the presence or absence of conduction by the DX code read by the contact of the electrical contact 10.

Next, the operation of the electrical contact 10 and the spring 13 when the film cartridge 3 is loaded and unloaded will be described. When the film patrone 3 is not loaded in the film patrone chamber 4, the head 10a of the hat of the electrical contact 10 is urged by the spring 13 in the extended state and protrudes, and the protrusion is restricted by the cover 11 at the flange. ing. The one shown in FIG. 3 is in a normal protruding state, and no trouble such as being sandwiched by a gap has occurred. The connection with the circuit board 14 is made smoothly. However, if the projection 17 that engages with the coil spring core of the spring 13 is not provided on the fixing plate 15, it does not smoothly advance and retreat, does not project in a normal state, and is smoothly connected to the circuit board 14. May not be.

When the film cartridge 3 is loaded, the head 10b of the hat of the electric contact 10 is buckled while being urged by the spring 13, and retreats to reduce the amount of protrusion. At this time, the spring is provided on the projection 1 provided on the fixed plate 15.
Since it buckles to a normal state while engaging with the connector 7, no trouble such as abnormal bending or being caught in a gap occurs, and the connection with the circuit board 14 is performed smoothly.

Next, when assembling the apparatus of the present embodiment, the holes of the circuit board 14 are engaged with the projections 17 provided on the fixing plate 15, and then the core of the spring 13 is engaged. Put the contact 10 on the tip of the projection 17 and the other end of the spring 13,
Six electrical contacts 10 and six openings 11a of cover 11
And the projection 11b of the cover 11 and the fixing plate 1
The cover 11 is engaged with the fixing plate 15 by the elasticity of the cover 11 so as to correspond to the holes 15b of the fifth.

Next, when assembling and mounting the apparatus of this embodiment on the camera body 2, the device is screwed into the screw threaded on the camera body 2 with screws 16 and fixed.

[0017]

According to the present invention, according to the present invention, the projecting portion 17 protruding from the fixing member 15 is provided with the connecting means 14 and the urging means 1.
3, the connecting means 14 is fixed at a normal position, and the urging means 13 is movably held at a stable normal position and posture even if the urging means 13 bends and stretches with respect to the fixing member 15. The urging means 13 smoothly and stably bends and expands due to the advance and retreat of the member 10, and the urging means 13 moves away from a normal position or posture, for example, the lid member 11 at the opening of the lid member 11.
There is no obstacle such as a part of the urging means 13 entering the gap between the urging means 13 and the electric contact member 10, so that no malfunction occurs due to this, and the urging means 13 There is no possibility that the means 13 is disconnected from the connection means 14 and becomes non-conductive. Further, the electric contact member 10 and the urging means 13 are moved forward and backward by the urging of the urging means 13 and the loaded film cartridge 3, but the position and the posture of the electric contact member 10 are normal due to the instability of the position and the posture of the urging means 13. There is no trouble such as tilting at the opening away from the state, so that malfunction does not occur.
Further, the protrusion can be formed integrally with the fixing member 15 without increasing the size of the device, and can be installed without increasing the manufacturing cost. Since the lid member 11 and the fixing member 15 each have a fitting portion that fits with each other, the assembling operation can be easily performed.

[Brief description of the drawings]

FIG. 1 is a conceptual configuration diagram of a camera on which an apparatus according to an embodiment of the present invention is installed, as viewed from behind a camera.

FIG. 2 is a sectional view of the embodiment.

FIG. 3 is a sectional view of the present embodiment.

FIG. 4 is a cross-sectional view of another embodiment of the present invention.

FIG. 5 is a sectional view of another embodiment of the present invention.

FIG. 6 is a sectional view of a conventional example.

FIG. 7 is a sectional view of a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Camera, 2 ... Camera body, 3 ... Film patrone, 4 ... Film patrone room, 5 ...
..Exposure aperture, 7 ... film rewind shaft, 8 ... sprocket, 9 ... spool, 10 ... electric contact,
11: cover, 13: spring, 14: circuit board, 15: fixing plate, 16: screw, 17: protrusion

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-59-219731 (JP, A) JP-A-60-158424 (JP, A) JP-A-61-20932 (JP, A) JP-A-62 153842 (JP, A) Fully open 1986-88123 (JP, U) Fully open 1987-41132 (JP, U) Fully open 1987-140525 (JP, U) Fully open 1987-188742 (JP, U) Japanese Utility Model Application No. Sho 64-9226 (JP, U) Japanese Utility Model Application No. Hei 1-130119 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) G03B 7/00-7/28

Claims (1)

(57) [Claims] When a film cartridge having a plurality of electric signal patterns for transmitting information about a film is mounted on an outer surface of the film cartridge, the electric signal pattern is read, and the camera is mounted on a wall of a film cartridge room of the camera. In the film information reading device, the film cartridge can be displaced between a projecting position protruding from a wall surface of the film cartridge chamber of the camera toward the film cartridge inside and a retreating position retreating in the film cartridge outside direction. A plurality of electrical contact members that come into contact with the electrical signal pattern of the film cartridge when a film cartridge is loaded into the film cartridge; and a flexible printed circuit board that electrically transmits an electrical signal obtained at the electrical contact member to an electrical circuit of the camera. The plurality of electrical contact members and the flexible End portions respectively contact the conductive lands of the printed circuit board, and electrically connect the electrical contact member and the flexible printed circuit board,
A biasing means for biasing the electrical contact member in the direction of the protruding position; a fixing member which integrally incorporates the electrical contact member, the biasing means and the flexible printed circuit board to form a unit case, and a lid member thereof And the fixing member includes:
A projection projecting in a direction in which the electrical contact member protrudes to support the electrical contact member, and penetrating a hole formed in a conductive land of the flexible printed board so as to fix the flexible printed board at a predetermined position. A film information reading device provided.