JPH0882828A - Film information reader - Google Patents

Abstract

PURPOSE: To stabilize the position and posture of a spring and to prevent the occurrence of operation failure by installing a projecting part passing through a hole made in the conductive land of a flexible printed board on a fixing member. CONSTITUTION: Six opening parts constituting a part of the wall part of a film cartridge chamber, opening to the film cartridge chamber and being engaged with six electrical contacts 10 one by one are formed in a cover 11. The six opening parts are made of electrical insulating material so as to mutually insulate six electrical contacts 10. The projecting part to be engaged the hole 15b is provided on the fixing board 15, and the projecting part constituted of elastic material is engaged by the elasticity. The circuit board 14 is firmly supported by the fixing board 15, and an outer part is formed of the fixing board 15 and the cover 11, and then, the fixing board 15 is screwed on the camera body. The projecting part 17 is provided on the fixing board 15 so as to be engaged with the coil spring core part of the spring 13. The projecting part 17 is formed into a tappered and columnar shape and provided on the main part of the fixing board 15 so as to be almost perpendicular to the board 15.

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 cartridge having an electric signal pattern on the outer surface for transmitting information about the film to the camera is loaded in the camera, the information is read and the information is transmitted to the read information analyzing means installed in the camera. It relates to the device.

[0002]

2. Description of the Related Art Recently, a film cartridge having an electric signal pattern for transmitting information about a film to a camera has been used, and when such a film cartridge is loaded into a camera, the information is read. A film information reading device has been developed which transmits the read information to a reading information analysis means installed in a camera. Examples of such a device include, for example, SAIkaihei 1-155031 and SAIkai Sho 63.
-162419. Actual Kaihei 1-1550
A conventional example according to No. 31 will be described with reference to FIGS. 6 and 7 are sectional views of a conventional example. The film information reading device is a film cartridge room 4 of the camera body 2.
Cover 11, electrical contact 10, spring 1 provided on the wall surface of
3, the circuit board 14 and the fixing plate 15.
The cover 11 forms a part of the wall portion of the film cartridge chamber 4, is opened to the film cartridge chamber 4, and is provided with six openings 11a into which six electric contacts 10 are fitted one by one. . It is made of an electrically insulating material and insulates 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 electrical contact 10 has a hat-like shape having a collar and is made of an electrically conductive material.
The hat-shaped head is fitted into the inside of the film cartridge chamber 4 through the opening 11a formed in the cover 11 so as to protrude, and the spring 13 is provided when the film cartridge 3 is not loaded.
The protrusion is restricted by the cover 11 at the flange portion. When the film cartridge 3 is loaded, the film cartridge 3 moves backward to decrease the protrusion amount. The backward movement is restricted in the direction of the fixed plate 15 by the bias of the spring 13. Spring 13
Is a coil spring and is made of a conductive material. The electric contact 10 is pressed at one end and the circuit board 14 fixed to the fixed plate 15 is pressed at the other end by urging. The circuit board 14 is a flexible printed circuit board fixed to the fixed plate 15. The circuit board 14 reads the film sensitivity and other film information according to a signal based on the presence or absence of conduction by the DX code when the electric contact 10 comes into contact therewith and transmits the film information to the CPU of the camera body. .

In Japanese Utility Model Laid-Open No. 63-162419, the spring 13 is a coil spring made of an electrically 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. The electric contact 10 at one end is penetrated through a hole provided in a holding member (not shown) supported by the fixed plate 15 at the other end and fitted into a side surface portion of this hole, so that the circuit board 14 on the fixed plate 15 is fixed. It is pressed by an urging force to make an electrical connection.

[0004]

The conventional technique of this type has the following problems. In the technique disclosed in Japanese Utility Model Laid-Open No. 1-155031, since the position and posture of the spring are only given by the engagement with the recess of the contact portion, the spring is not stable when the spring is bent or stretched due to the forward / backward movement of the electrical contact. There is a case where the position or posture deviates from the normal state, and a malfunction occurs due to an obstacle such as a part of the spring getting into a gap between the cover and the electric contact in the opening of the cover. Further, when the present apparatus is assembled into the camera body, the fixing work is not performed in order to arrange the fixed portion in a stable position and posture with respect to the camera body, and therefore the assembling work cannot be easily performed. Further, there is a drawback that the size of the device becomes large because the energized spring is housed.

In the technique disclosed in Japanese Utility Model Laid-Open No. 63-162419, the position and attitude of the electrical contacts that move forward and backward due to the biasing of the spring and the pressing of the film cartridge loaded from the normal state are changed due to the unstable position and attitude of the spring. There was a case where malfunction occurred due to 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 plate on the flexible printed board side may become unstable, or the spring may become disconnected and become non-conductive.

The present invention has been made in view of the above problems, and provides a device that stabilizes the position and posture of a spring to prevent malfunction, and at the same time, is inexpensive to be easily incorporated into a camera body. It is intended to provide a new device.

[0007]

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides a film cartridge having a plurality of electric signal patterns on the outer surface for transmitting information relating to the film, when the electric signal patterns are provided. 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 to the inside of the film cartridge room, and a retracted position retracted toward the outside of the film cartridge room. A plurality of electric contact members which are displaceable between the electric contact members and which come into contact with the electric signal pattern of the film cartridge when the film cartridge is loaded in the film cartridge chamber, and the electric signal obtained at the electric contact member End portions of the flexible printed circuit board electrically transmitting to the electric circuit, the plurality of electric contact members, and the conductive lands of the flexible printed circuit board are electrically connected to each other to electrically connect the electric contact member and the flexible printed circuit board. The electrical contact member and urge the electrical contact member toward the protruding position. Urging means, the electric contact member, the urging means, and the flexible printed circuit board are integrally incorporated to form a unit case, and a fixing member and a lid member thereof are provided. A protrusion is provided so as to support the contact member in the protruding direction of the electric contact member, and to penetrate the hole formed in the conductive land of the flexible printed circuit board so as to fix the flexible printed circuit board at a predetermined position. A film information reading device characterized by the above is constructed.

[0008]

[Function] The protrusion 17 is provided so as to protrude from the fixing member 15.
Engages and fixes the circuit board 14 to the fixing member 15 at a predetermined position. A protruding portion 17 provided so as to project on the fixing member 15 engages the biasing means 13 with the fixing member 15 at a predetermined position, and is stable and normal even when the biasing means 13 bends and extends with respect to the fixing member 15. Is movably held in the position and 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]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A camera equipped with an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a conceptual configuration diagram as seen from the rear of the camera installed in this embodiment. The camera 1 is provided with a film cartridge chamber 4 in which a camera body 2 is loaded with a film cartridge 3 and housed therein, an exposure opening 5 and a spool 9. In addition, the film rewind shaft 7, sprocket 8,
A spool 9 and a plurality of electric contacts 10 are installed and configured. A plurality of electric contacts 10 are provided in the film cartridge chamber 4
Projects from the opening 11a provided in the. Normal D
In the X code, the number of electrical contacts 10 is 6,
Therefore, the number of openings 11a is also six. For the film sensitivity and other film information, a plurality of electric contacts 10 are brought into contact with the DX code formed by printing 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 plurality of electrical contacts 10 are contacted to the DX code. The film sensitivity and other film information are read by a signal based on the presence / absence of electrical continuity due to, and transmitted to the CPU of the camera body.

An embodiment of the present invention will be described with reference to FIGS. 2 and 3 are cross-sectional views of this embodiment.
4 and 5 are cross-sectional views of another surface of this embodiment.
The film information reading device is provided with a cover 11 provided on the wall surface of the film cartridge chamber 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 portion of the film cartridge chamber 4 and opens in the film cartridge chamber 4,
6 openings 1 into which 1 electrical contact 10 is fitted, 1 each
1a is provided. Made of electrically insulating material 6
The individual electric contacts 10 are insulated from each other. The fixing plate 15 is provided with a protrusion 11b that engages with the hole 15b, is made of an elastic material, and engages with the elasticity. The fixing plate 15 firmly 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 protrusion 17 that engages with the coil spring core of the spring 13.

The protrusion 17 has a cylindrical shape with a thin tip, and is provided substantially perpendicular to the main portion of the fixed plate 15. Its thickness is such that it can be engaged with the coil spring core of the spring 13. The length is such that when the electrical contact 10 is retracted and its head 10c contacts the film cartridge 3 in the wall of the film cartridge chamber 4, it contacts the inside of the head 10c and the collar portion 10d does not contact the fixing plate 15. Is the length of. The root portion of the cylinder penetrates a hole (not shown) formed in the circuit board 14, and therefore one end of the spring 13 is stably brought into contact with the circuit board 14 and electrically connected thereto at the root portion. The tip of the cylinder is slightly thin,
The spring 13 can be easily assembled and attached. However, since it is not extremely sharp, the head 1 of the electrical contact 10
It does not damage 0c.

The electric contact 10 has a hat-like shape having a brim and is made of an electrically conductive material. The hat-shaped head is fitted into the inside of the cartridge chamber 4 through the opening 11a formed in the cover 11 so as to project, and when the film cartridge 3 is not loaded, it is urged by the spring 13 to project and the cover at the collar portion. The protrusion is limited by 11. When the film cartridge 3 is loaded, the film cartridge 3 moves backward to decrease the protrusion amount. In the direction of the fixed plate 15 or at the collar portion, the fixed plate 15
The retreat is limited by the protrusion 17 provided on the.
The spring 13 is a coil spring and is made of a conductive material. The electric contact 10 is pressed at one end and the circuit board 14 is pressed against the fixed plate 15 at the other end by urging. Protrusions 17 provided on the fixing plate 15 in the hollow core of the coil spring
Is loosely fitted. The circuit board 14 is a flexible board pressed against the fixed plate 15, and transmits the 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 with the electric contact 10.

Next, the operation of the electric contact 10 and the spring 13 when the film cartridge 3 is loaded and unloaded will be described. When the film cartridge 3 is not loaded in the film cartridge chamber 4, the head portion 10a of the cap of the electric 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 collar portion. ing. The one shown in FIG. 3 is in a normal protruding state, and there is no problem that it is caught in a gap. Further, the connection with the circuit board 14 is smoothly performed. However, unless the protrusion 17 that engages with the coil spring core of the spring 13 is provided on the fixed plate 15, the spring does not move forward and backward smoothly and does not project into a normal state, and the connection with the circuit board 14 is performed smoothly. May not be.

When the film cartridge 3 is loaded, the head portion 10b of the hat of the electrical contact 10 is buckled while being biased by the spring 13, and retracts to decrease the protrusion amount. At this time, the spring is the protrusion 1 provided on the fixed plate 15.
Since it is buckled into a normal state while engaging with 7, no problems such as abnormal bending or being caught in a gap occur, and the connection with the circuit board 14 is smoothly performed.

Next, when assembling the device of this embodiment, the holes of the circuit board 14 are engaged with the protrusions 17 provided on the fixing plate 15, and then the core of the spring 13 is engaged, and then the electric Cover the tip of the protrusion 17 and the other end of the spring 13 with the contact 10,
Six electrical contacts 10 and six openings 11a in the cover 11
And the projection 11b of the cover 11 and the fixed plate 1
5, the cover 11 is engaged with the fixing plate 15 by the elasticity of the cover 11.

Next, when the apparatus according to the present embodiment is assembled and mounted on the camera body 2, it is screwed and fixed to the screw threaded on the camera body 2 with the screw 16.

[0017]

According to the present invention, the projecting portion 17 provided so as to project on the fixing member 15 has the connecting means 14 and the urging means 1.
3, the connecting means 14 is fixed in a normal position, and the biasing means 13 is movably held in a stable normal position and posture even when the urging means 13 bends and extends with respect to the fixing member 15. The biasing means 13 smoothly and stably bends and stretches as the member 10 moves back and forth, the biasing means 13 moves away from the normal position or posture, and the lid member 11 at the opening of the lid member 11, for example.
There is no obstacle such as a part of the urging means 13 entering the gap between the electric contact member 10 and the electric contact member 10, and therefore no malfunction occurs due to this, and the urging means 13 urges when buckling. The means 13 will not be disconnected from the connection means 14 and become non-conductive. Further, although the electric contact member 10 and the urging means 13 are urged and the film cartridge 3 loaded is pressed, the electric contact member 10 moves forward and backward. There is no obstacle such as tilting in the opening away from the state, and thus malfunction does not occur.
Further, the projection 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 fitting portions that fit with each other, the assembling work can be easily performed.

[Brief description of drawings]

FIG. 1 is a conceptual configuration diagram seen from the rear of a camera in which an apparatus according to an embodiment of the present invention is installed.

FIG. 2 is a sectional view of the present embodiment.

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

FIG. 4 is a cross-sectional view of another surface of this embodiment.

FIG. 5 is a cross-sectional view of another surface of the present embodiment.

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

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

[Explanation of symbols]

1 ... Camera, 2 ... Camera body, 3 ... Film cartridge, 4 ... Film cartridge room, 5.
..Exposure opening, 7 ... film rewinding shaft, 8 ... sprocket, 9 ... spool, 10 ... electric contact,
11 ... Cover, 13 ... Spring, 14 ... Circuit board, 15 ... Fixing plate, 16 ... Screw, 17 ... Projection

Claims (1)

[Claims] 1. A film patrone having a plurality of electric signal patterns for transmitting information about the film on the outer surface, the electric signal pattern is read when the film patrone is loaded, and a camera mounted on a wall surface of a film patrone chamber of the camera. In the film information reading device, the film patrone chamber is displaceable between a projecting position projecting from the wall surface of the film patrone chamber of the camera to the inside of the film patrone chamber and a retracted position retracted in the outward direction of the film patrone chamber. A plurality of electric contact members that come into contact with the electric signal pattern of the film cartridge when the film cartridge is loaded into the film; and a flexible printed circuit board that electrically transfers the electric signals obtained at the electric contact members to the electric circuit of the camera. , The plurality of electrical contact members and the flexible End contacting the conductive land of the printed circuit board to electrically connect the electric contact member and the flexible printed circuit board,
A biasing unit that biases the electric contact member in the protruding position direction, the electric contact member, the biasing unit, and the flexible printed circuit board are integrally incorporated to form a unit case, and a fixing member and a lid member thereof. And the fixing member,
A protrusion protruding in a protruding direction of the electric contact member so as to support the electric 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 reader characterized by being provided.