JP2001188274A - Film information reader and camera equipped with same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a film information reader which has simple constitution, consists of the small number of components, and is assembled with small man- hours. SOLUTION: Plural DX segments 46 which are energized and pressed against the DX code provided on the external wall of a film cartridge 100 are clamped together with a screw 47 to a flexible printed board 42 where electric wiring patterns for the respective DC segments are arranged; went the film cartridge 100 is not loaded, abutting parts 49 provided at the DX segments 46 abut against a grounding pattern 44 arranged on the flexible printed board 42 with the elastic force of the DC segment itself and when the film cartridge 100 is loaded, the abutting parts 49 leave the grounding pattern 44.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a film information reader for reading the above film information from a film cartridge having a film information code, and a camera provided with such a film information reader.

[0002]

2. Description of the Related Art Conventionally, a film cartridge (patrone) provided with a film information code (DX code) recording various information of a film stored therein has been widely used.

Various types of film information reading apparatuses for reading such film information have been proposed in the past. For example, Japanese Patent Application Laid-Open No. 186609/1994 discloses that film information can be read and the presence or absence of a film cartridge can be detected. The disclosed film information reading device is disclosed.

The film information reading device disclosed in this publication has a plurality of sections urged in a direction abutting against a film information code provided on an outer wall of a film cartridge and contacts a ground pattern of the film information code. A lead wire is connected to each of the film information reading sections except for the grounding section that comes in contact with the film information reading section, and when the film cartridge is not loaded and the plurality of sections protrude from the inner wall surface, the film information reading section When the film cartridge is loaded and the plurality of sections are all pushed into the inner wall surface side by the film cartridge, the film information reading section and the grounding section are connected. A short bar is provided to cut off the conduction between the short bar. Then, the film information is read by detecting the potential of the lead wire, and the presence or absence of the film cartridge is detected.

[0005]

In the film information reading device disclosed in the above-mentioned publication, a plurality of electric segments are brought into contact with the short bar as a ground member as described above. However, such a method not only requires a grounding member, but also increases the number of assembling steps such as the necessity of soldering the grounding member to the electric board via a lead wire.

The present invention has been made in view of the above points, and provides a film information reading apparatus having a simple configuration, a small number of parts, and a small number of assembling steps.
It is an object to provide a camera equipped with such a film information reading device.

[0007]

In order to achieve the above object, a film information reading apparatus according to the present invention comprises a plurality of sections urged in a direction of pressing against a film information code provided on an outer wall of a film cartridge. And a plurality of input terminals respectively connected to the film information reading section excluding the grounding section that abuts on the ground pattern of the film information code among the plurality of sections. A film information reading device for detecting and reading film information, wherein the film information reading section is electrically connected to the grounding section when the film cartridge is not loaded, and the film cartridge is loaded. In the state, grounding means for cutting off conduction between the film information reading section and the grounding section, and the film information Respectively provided in the reading sections comprises a said grounding means and resiliently abutting contact portion, said grounding means is characterized in that provided on the circuit board.

That is, according to the film information reading apparatus of the present invention, the grounding means is provided on the electric board, and the contact portions elastically contacting the grounding means are provided on each of the film information reading sections. Further, since the soldering of the lead wires and the grounding member are not required, it is possible to provide a film information reading apparatus having a simple configuration, a small number of parts, and a small number of assembly steps.

Preferably, the input terminal is provided on an electric board on which the grounding means is provided.

According to another aspect of the present invention, there is provided a camera including a film information reading apparatus according to the present invention, comprising a plurality of sections biased in a direction of pressing against a film information code provided on an outer wall of a film cartridge. And a plurality of input terminals respectively connected to the film information reading section excluding the grounding section that abuts on the ground pattern of the film information code among the plurality of sections. A camera provided with a film information reading device for detecting and reading film information, wherein the film information reading section is electrically connected to the grounding section when the film cartridge is not loaded, and the film cartridge Is loaded,
Grounding means provided on an electric board for interrupting conduction between the film information reading section and the grounding section, and elastically contact with the grounding means provided on each of the film information reading sections. A film information reading device comprising: a contact portion that comes into contact with the film information reading device.

That is, according to the camera provided with the film information reading device of the present invention, the grounding means is provided on the electric board, and the contact portions elastically contacting the grounding means are respectively provided with the film information reading sections. By eliminating the need for soldering lead wires and grounding members, it is possible to provide a camera having a film information reader with a simple configuration, a reduced number of components, and a reduced number of assembly steps. Become.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment] FIG. 3 is a block diagram showing the internal structure of a camera to which the film information reading apparatus according to the first embodiment is applied.

That is, the camera is provided with a control circuit (hereinafter referred to as a CPU) 10 provided in the camera body for controlling the entire camera.
The CPU 10 includes a DX code input circuit 11, a film feeding circuit 12, a film feeding state detecting circuit 13, a distance measuring circuit 14, an ambient light measuring circuit 15, a shutter control circuit 1
6. Sector position detection switch 17, motor drive circuit 1
8, lens movement state detection circuit 19, strobe circuit 20,
First (1st.) Release detection switch 21 and second
(2nd.) Various circuits such as a release detection switch 22, a mode setting circuit 23, and a display circuit 24 are electrically connected to each other.

Here, the DX code input circuit 11
A film cartridge (hereinafter referred to as “patrone”) 100 in which a roll film 101 is wound and stored.
Film information code (hereinafter referred to as DX code) 1
From 02, for example, film information such as film ISO sensitivity is read.

The film feeding circuit 12 controls the driving of a film feeding mechanism 25 via a film feeding motor 26 so that the film 10 sent from the patrone 100 is controlled.
Feed one. The film feeding state detecting circuit 13 detects the perforation or the like of the film 101 during the film feeding operation by the film feeding circuit 12,
The movement amount is detected.

The distance measuring circuit 14 is a distance measuring means for measuring the distance to the main subject 27 located substantially at the center of the photographing screen. The distance measuring circuit 14 includes, for example, a light emitting diode (L
A light beam emitted by a light projecting element 28 such as an ED) is projected toward a subject 27 through a light projecting lens 29, and the reflected signal light is condensed by a light receiving lens 30. The light is received by a light receiving element 31 composed of a detection element (PSD) or the like, and the subject 2 is
The distance to 7 is measured. The data (digital value) such as the subject distance information obtained here is transmitted to the CPU 10.

The ambient light measuring circuit 15 is formed by a photometric sensor 32 for measuring the brightness of the field including the subject 27 and the like.

The shutter control circuit 16 includes a sector shutter 34 having aperture / shutter blades for opening and closing the exposure aperture.
Plunger 33 as a drive mechanism for opening and closing the
Is performed. The sector position detection switch 17
The position of the sector shutter 34 is detected. Here, the sector shutter 34 is a diaphragm / shutter having a triangular aperture characteristic. That is, the sector shutter 34
When the drive of the plunger 33 is controlled by the shutter control circuit 16, the sector opening (exposure opening) is gradually opened by an on signal from the plunger 33, while an off signal from the plunger 33 is opened by an off signal from the plunger 33. The sector opening (exposure opening) is rapidly closed, and the start of the opening operation of the sector opening (exposure opening) is detected by the sector position detection switch 17. I have.

The motor driving circuit 18 includes the distance measuring circuit 14
To move the focus adjustment lens 36 of the photographing optical system held in a lens barrel (not shown) along the optical axis direction via the focus drive mechanism 37 based on subject distance information and the like obtained by the The drive of the motor 35 is controlled. The lens moving state detecting circuit 19 detects the moving state of the focusing lens 36 from the reference position.

The strobe circuit 20 performs light emission control and charging of a strobe unit including a light emitting portion 38 formed by a reflector, a xenon (Xe) tube or the like.

The first release detection switch 21 is a release button 3 disposed at a predetermined position on the upper part of the camera body.
9 is a switch that responds to the ON state (half-pressed state) of the first stage, and the second release detection switch 22 is the ON state of the release button 39 (the fully-pressed state).
The switch responds to

The mode setting circuit 23 is for setting the operation mode of the camera. The display circuit 24
The operation mode of the camera, shooting conditions, and the like set by the mode setting circuit 23 are displayed, for example, on a liquid crystal display (LCD; not shown) provided on the exterior part of the camera body, or on a display unit ( (Not shown) or the like.

FIGS. 1 and 2 are a sectional view and a plan view, respectively, showing the structure of a film information reading apparatus according to a first embodiment of the present invention.

A flexible printed circuit board 42 is adhered to an outer wall of a patrone chamber 41 provided in the camera body 40 accommodating the patrone 100 by, for example, a double-sided tape. In this case, the patrone room exterior wall
The two flexible positioning protrusions 43 are provided, and the flexible printed circuit board 42 is arranged so that the flexible positioning protrusions 43 are inserted into the positioning holes formed in the flexible printed circuit board 42, thereby providing a flexible structure. The positioning of the printed circuit board 42 is performed.

On the flexible printed circuit board 42, an electric wiring pattern (not shown) is provided.
In the vicinity of the front end of A, it is connected to a main flexible printed board (not shown) on which the CPU 10 and the like are mounted. Also, as shown by hatching in FIG.
A ground pattern 44 is provided along one side of the flexible printed circuit board 42.

On the other hand, on the outer wall of the patrone room 41,
When the patrone 100 is loaded into the patrone chamber 41, the DX code 102 is located at the position where the DX code 102 is located.
A plurality of (four in the present embodiment) openings 45 are provided.

A conductive DX section 46 is attached to each of the openings 45 by screws 47 as fixing means. In this case, the screw 47 is used to fasten the flexible printed board 42 and the DX section 46 together at a position corresponding to an electric wiring pattern position (not shown) on the flexible printed board 42. Conduction with the electric wiring pattern on the printed board 42 is obtained.

Here, each DX section 46 is connected to the opening 4
At the rear end opposite to the direction 5, the movement in the X and Y directions is regulated by a section positioning projection 48 provided on the camera body 40, and is fixed by the screw 47.

The opening 45 of each DX section 46
As shown in FIG. 1, the extending portion in the direction is bent twice into a “U-shape” in the middle, and in a state where the patrone 100 is not loaded, the contact portion 46 </ b> A provided at the tip thereof is provided.
Is inserted into the cartridge chamber 41 through the opening 45. Also, in each DX section 46,
At a position corresponding to the ground pattern 44 on the flexible printed board 42, a convex contact portion 49 protruding toward the ground pattern 44 is provided,
In a state where the patrone 100 is not loaded, the contact portion 49 comes into contact with the grounding pattern 44 and DX
The section 46 and the ground pattern 44 are electrically connected. That is, the DX is bent by the above-mentioned two places.
Each of the DX sections 46 is shaped such that the contact section 46A is urged toward the inside of the patrone chamber 41 when the section 46 is assembled, and when the patrone 100 is not loaded, the contact section 49A is surely formed. Are in contact with the ground pattern 44.

Then, when the patrone 100 is loaded into the patrone chamber 41, the D
The contact section 46A is pushed in a direction opposite to the urging direction of the X section 46, and the DX section 46 retreats to a position shown by a two-dot chain line in FIG. Thereby, the contact portion 49 is connected to the ground pattern 4 on the flexible printed circuit board 42.
4 and the conduction between the DX section 46 and the ground pattern 44 is cut off. At this time, the contact portion 46A of each DX section 46 is in contact with the area 103 of the DX code 102 of the patrone, and the DX code 102 can be read. The DX code 102 is composed of a plurality of areas 103, and the surface of each of the areas 103 becomes conductive or non-conductive depending on the ISO sensitivity, the number of shots, and the like of the film stored in the patrone 100. I have.

When the patrone 100 is loaded, the opening 4 provided on the outer wall of the patrone chamber 41 is opened.
5 is closed by the patrone 100 itself, so that there is little possibility that external light leaks into the patrone chamber 41.
After assembling the section 46, the front plate 50 is attached to the camera body 40, so that more reliable light shielding is performed.

FIG. 4 is a circuit diagram showing the electrical configuration of the DX code input circuit 11 in such a film information reading device.

That is, the DX section 46 (46-1 to 46-
4) is that the contact portion 46A (46A-1 to 46A-4)
The unillustrated electricity on the flexible printed circuit board 42 connected to the ground pattern 44 on the flexible printed circuit board 42 via the contact portions 49 (49-1 to 49-4) and contacted by the screws 47. It is connected to the CPU 10 on the main flexible printed board via a wiring pattern.

The four DX sections 46-1 to 46-4
Among them, 46-1 is connected to the ground line of the circuit, and constitutes a grounding section arranged at a position corresponding to the grounding area (ground pattern) on the patrone 100. The remaining three DX sections (46-2 to 46-4) constitute a section for reading film information, and are arranged on the cartridge 100 at positions corresponding to the film information code.

Here, the four DX sections 46-1 to 46-
4 is electrically connected to the grounding pattern 44 when the patrone 100 is not loaded in the patrone chamber 41. Therefore, even if static electricity is generated for some reason, the static electricity is dropped to the ground here, so that other electric circuits such as the CPU 10 are not affected. In other words, Patrone 10
In a state where 0 is not loaded, the ground pattern 44 is grounded because it is electrically connected to the DX section 46-1, and the other DX sections 46-2 to 46-4 are also electrically connected to the ground pattern. It is because it has fallen to the ground.

Then, the patrone 1 is placed in the patrone chamber 41.
00, the DX sections 46-1 to 46-4
The conduction between the ground pattern 44 is cut off. Then, based on the potential of the ground pattern 44, it can be determined whether or not the cartridge 100 is loaded. That is, the loaded state of the cartridge 100 can be determined based on whether or not the ground pattern 44 is dropped to the ground.

On the other hand, DX code 1 on patrone 100
Reference numeral 02 denotes a configuration in which a part of the film 101 is electrically connected according to the ISO sensitivity and the number of recordable images of the film 101 stored in the patrone 100, and a part is configured as a ground area (ground pattern). Have been.
For details of the DX code, see, for example,
Since it is disclosed in JP-A-86609, its description is omitted here.

Thus, the patrone 1 is placed in the patrone chamber 41.
00 is loaded, the above four DX sections 46-1 to 46-1
One of the wires 46-4 (for example, the DX piece 46-1) is a ground piece, and the contact portion 46A-1 contacts the ground area of the DX cord 102. As a result, the electrical wiring pattern (input terminal) (not shown) on the flexible printed circuit board 42 electrically connected to the DX section 46-1 and the screw 47 by the joint fastening becomes a ground pattern. On the other hand, the remaining three DX sections 46-2 to 46-4 function as sections for reading film information, and the respective contact portions 46A-2 to 46A-4 serve as the ISO sensitivity information of the DX code 102. Touch detection area. Therefore, these D
By detecting each potential of an electric wiring pattern (input terminal) (not shown) on the flexible printed circuit board 42 electrically connected to the X-sections 46-2 to 46-4 and the screws 47 together, the CPU 10 , Loaded patrone 10
The ISO sensitivity of the film 101 within 0 can be read.

In this embodiment, since four DX sections are used, only the ISO sensitivity can be read. However, by further increasing the number of DX sections, other film information such as the number of photographable images can be obtained. Of course, it is also possible to read.

As described above, according to the first embodiment, the number of ground members can be reduced by eliminating the conventional short bar and forming the ground pattern 44 on the flexible printed circuit board 42. In addition, each DX section 46 is C
To connect to the main flexible printed circuit board on which the PU 10 is mounted, the electric wiring pattern on the flexible printed circuit board 42 connected to the main flexible printed circuit board and the DX section 46 are fastened together with screws 47 without using lead wires. By doing so, these lead wires become unnecessary, and the number of soldering steps can be reduced.

[Second Embodiment] Next, a second embodiment of the present invention will be described.
An embodiment will be described.

FIG. 5 is a sectional view showing the structure of a film information reading apparatus according to a second embodiment of the present invention.

In the second embodiment, one rigid printed circuit board 51 is attached to the outer wall of the patrone chamber 41 with screws 47 instead of the flexible printed circuit board in the first embodiment. is there. In this case, the ground pattern 44 is provided on the rigid printed circuit board 51.
And the electric wiring pattern 52 for each DX section 46 are routed. Each DX section 46 is provided with a contact portion 49 at a position corresponding to the ground pattern 44, and a contact portion 46 B corresponding to the position of the corresponding electric wiring pattern 52. In order to ensure the contact between the contact portion 46B and the electric wiring pattern 52, the DX section 46 is, as shown by a broken line in FIG.
The screw 47 is bent toward the cartridge chamber 41 side.
Is regulated by the rigid printed circuit board 51 and comes into contact with the electric wiring pattern 52 with a sufficient urging force.

As described above, even when the rigid printed circuit board 51 is used, the number of grounding members can be reduced as in the first embodiment, and no lead wire is required, and the number of soldering steps is reduced. Will be able to do it.

Although the present invention has been described based on the above embodiments, the present invention is not limited to the above embodiments, and various modifications and applications are possible within the scope of the present invention. . Here, the summary of the present invention is as follows.

(1) A plurality of sections urged in a direction of pressing against the film information code provided on the outer wall of the film cartridge, and of the plurality of sections, a grounding section abutting on the ground pattern of the information code. And a plurality of input terminals respectively connected to the film information reading sections except for the film information reading device, wherein the film information reading device reads the film information by detecting the potential of the input terminals, wherein the film cartridge is loaded. In the absence state, the film information reading section is electrically connected to the grounding section, and in a state where the film cartridge is loaded,
Grounding means for interrupting conduction between the film information reading section and the grounding section, and a contact portion elastically contacting the grounding means provided on the film information reading section,
Wherein the input terminal and the grounding means comprise a contact pattern provided on an electric board.

(2) The film information reading device according to (1), wherein the contact portion has a convex shape protruding toward the grounding means.

(3) The film information reading device according to (1), wherein the electric substrate is a flexible printed circuit board.

(4) It further comprises a fixing means for fixing and holding the plurality of pieces, and a grounding pattern provided on the electric board which is electrically connected to the grounding piece. By overlapping and fixing a plurality of sections and the electric board, conduction between the film information reading section and the input terminal and conduction between the grounding section and the grounding pattern are obtained. The film information reading device according to (1), wherein:

(5) A plurality of sections urged in a direction of pressing against the film information code provided on the outer wall of the film cartridge, and of the plurality of sections, a grounding section abutting on the ground pattern of the information code. A plurality of input terminals respectively connected to the film information reading sections except for the film cartridge, and a camera provided with a film information reading apparatus for detecting film potential by detecting the potential of the input terminals, wherein the film cartridge When the cartridge chamber is loaded with the film cartridge and the film cartridge is not loaded in the cartridge chamber, the film information reading section is electrically connected to the grounding section, and the film cartridge is loaded in the cartridge chamber. In this state, the conduction between the film information reading section and the grounding section is cut off. A first electrical board provided with a grounding means, a contact portion provided on each of the film information reading sections and elastically in contact with the grounding means, and a control means for controlling the entire camera; A second electrical board connected to the first electrical board and disposed in the vicinity of the cartridge chamber, wherein the input terminal and the grounding means are provided on a contact provided on the second electrical board. A camera comprising a film information reading device comprising a pattern.

[0052]

As described in detail above, according to the present invention,
With a simple configuration, it is possible to provide a film information reading device with a small number of parts and a small number of assembling steps, and a camera provided with such a film information reading device.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a configuration of a film information reading device according to a first embodiment of the present invention.

FIG. 2 is a plan view showing the configuration of the film information reading device according to the first embodiment.

FIG. 3 is a block diagram showing an internal configuration of a camera to which the film information reading device according to the first embodiment is applied;

FIG. 4 is a circuit diagram showing an electrical configuration of a DX code input circuit in the film information reading device according to the first embodiment.

FIG. 5 is a cross-sectional view illustrating a configuration of a film information reading device according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 CPU 11 Code input circuit 40 Camera main body 41 Patrone room 42 Flexible printed circuit board 42A Extension part 43 Flexible positioning convex part 44 Grounding pattern 45 Opening 46, 46-1 to 46-4 Section 46A, 46A-1 to 46A -4 contact part 46B contact part 47 screw 48 section positioning convex part 49, 49-1 to 49-4 contact part 50 front plate 51 rigid printed board 52 electric wiring pattern 100 patrone 101 film 102 DX code 103 DX code area

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Keita Takahashi 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Industrial Co., Ltd. F-term (reference) 2H002 FB10

Claims (3)

[Claims] 1. A plurality of sections urged in a direction of pressing against a film information code provided on an outer wall of a film cartridge, and a grounding section of the plurality of sections abutting on a ground pattern of the film information code. A plurality of input terminals respectively connected to the film information reading sections except for the film information reading device, wherein the film information reading device reads the film information by detecting the potential of the input terminal, wherein the film cartridge is loaded. In the absence state, the film information reading section is electrically connected to the grounding section, and when the film cartridge is loaded, the film information reading section is disconnected from the grounding section. Means, and a contact portion provided on each of the film information reading sections and elastically in contact with the grounding means. The film information reading device, wherein the grounding means is provided on an electric board. 2. The film information reading device according to claim 1, wherein the input terminal is provided on an electric board provided with the grounding means. 3. A plurality of sections urged in a direction of pressing against a film information code provided on an outer wall of a film cartridge, and a grounding section of the plurality of sections abutting on a ground pattern of the film information code. A camera having a plurality of input terminals respectively connected to the pieces for reading film information except for a film information reading device for detecting film potential by detecting the potential of the input terminals. When the film cartridge is not loaded, the film information reading section is electrically connected to the grounding section. When the film cartridge is loaded, the film information reading section is electrically connected to the grounding section. Grounding means provided on the electric board for blocking the connection, and the contact means provided on each of the film information reading sections. Camera comprising the film information reading apparatus comprising: means and resiliently abutting contact portion.