JPH08234290A - Single-lens reflex camera - Google Patents

Abstract

PURPOSE: To provide a single-lens reflex camera in which wasteful assembling work or the like is eliminated and man-hour is reduced to reduce the manufacturing cost by enabling the action of a mirror box unit as a single body to be confirmed. CONSTITUTION: This camera is provided with the mirror box unit 30A provided with a mirror means for guiding luminous flux transmitted through a photographing lens to a finder optical system and provided freely attachably and detachably to/from a camera main body unit 30 and an electric circuit board 74 disposed in the unit 30A and provided with a check land means 78 which can check the electrical function of the unit 30A as the single body.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a single-lens reflex camera, and more particularly to a single-lens reflex camera having mirror means for guiding a light beam passing through a taking lens to a finder optical system.

[0002]

2. Description of the Related Art In recent years, in a camera or the like, a large number of flexible printed boards or the like have been generally applied in order to arrange various electric parts for performing operations such as photometry and distance measurement in high density. ing.

For example, in an electric device equipped with a flexible printed circuit board disclosed in Japanese Utility Model Laid-Open No. 62-36587, an opening for exposing a film and a camera body having a film feeding device are provided. An electrical contact (terminal) for electrically connecting with an external device other than the camera body is provided.

Further, in the mounting structure of the flexible printed circuit board of the camera disclosed in Japanese Patent Application Laid-Open No. 62-141525, a plurality of flexible printed circuit boards are mounted on the camera body side. On the surface side of the outermost extension piece of this flexible printed circuit board, the circuit adjustment of each flexible printed circuit board,
The check parts are arranged centrally.

[0005]

However, according to the means disclosed in Japanese Utility Model Laid-Open No. 62-36587 and Japanese Patent Application Laid-Open No. 62-141525, the check contacts are arranged only on the camera body side. However, in a general single-lens reflex camera or the like, it is composed of a plurality of units having various functions such as a movable mirror device and a mirror box having a finder optical system. It is supposed to be done.

Therefore, according to the above-mentioned means, for example, AF
(Autofocus) In order to perform inspection (operation confirmation, quality inspection, etc.) on a mirror box unit including an electric device such as an optical system, it is necessary to perform the inspection with the mirror box unit incorporated in the camera body side. Further, although it is possible to perform the inspection of the camera body alone, it is not possible to check the electric function of the mirror box itself by the mirror box unit alone.

That is, in order to check the electrical functions and the like of the various functions inside the camera, it is necessary to perform the check with the camera assembled, and as a result, for example, a defect or the like may be found in the mirror box unit. In this case, this mirror box unit (defective product) must be removed from the camera body again. This leads to an increase in man-hours, is extremely inefficient, and causes an increase in manufacturing cost and a deterioration in quality.

An object of the present invention is to solve the above-mentioned problems of the prior art and to inspect the mirror box unit alone (operation check,
(EN) A single-lens reflex camera capable of performing quality inspection and the like, eliminating unnecessary assembling work, reducing man-hours, and contributing to reduction in manufacturing cost.

[0009]

A single-lens reflex camera according to the present invention has mirror means for guiding a light beam passing through a photographing lens to a finder optical system, and is detachably attached to a camera body unit. A mirror box unit; and an electric board provided in the mirror box unit and having a check land means capable of checking the electrical function of the mirror box unit as a single unit. .

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is an assembled front view of a camera to which an embodiment of the present invention is applied. In FIG. 1, a flexible printed circuit board (hereinafter abbreviated as FPC).
17 is fixed to the inner surface of the upper plate 11 by a fixing screw 10 via a reinforcing plate 15 and the like. Touch-type switch 19 for inputting information, liquid crystal display panel 12, anisotropic conductive rubber 1
3 and the like are attached to the FPC 17 by means of mechanical compression by pressure bonding with a copper foil portion that has been subjected to conductive plating.
An electric contact for strobe (hereinafter, abbreviated as strobe contact) 16 is penetrated through a hole provided in the FPC 17,
It is soldered to a copper foil portion provided around this hole. The liquid crystal driver I is installed on the FPC 17.
Electrical components 14 such as C, a clock, and a strobe control circuit are mounted. Further, the FPC 17 has a movable portion 18 which can freely move from the upper plate 11, and an end portion (hereinafter, referred to as a movable end portion) 18A of the movable portion 18 is provided with a board connecting portion 24 described later. ing.

On the other hand, in addition to the above-mentioned upper plate unit 20, there is a main body unit 30 in which an FPC 32 is arranged on a camera main body 31. Electrical components such as a CPU (Central Processing Unit) 34 and an IC 35 are mounted on the FPC 32. The FPC 32 of the main body unit 30 is also provided with a board connecting portion 39 described later at one end 32A thereof. A control circuit for transmitting and receiving a signal from the upper plate unit 20 and performing power supply and control on the main body unit 30 side is provided in the camera main body 31. This control circuit includes a power supply device (not shown), a DC-DC converter, a control IC,
The signal line, which is composed of an EEPROM or the like, for transmitting and receiving a control signal to and from the upper plate unit 20 is the FPC.
The connection is made at the board connecting portion 39 at the end portion 32A of 32.

The upper plate unit 20 and the main body unit 3
A connection device 40 is used to connect 0 and 0 during the camera assembly process. As shown in an enlarged view in FIG. 2, the connecting device 40 sandwiches the movable end portion 18A of the FPC 17 and the end portion 32A of the FPC 32, and electrically and mechanically connects the board connecting portions 24 and 39 to each other. Connected, pedestal 41, elastic member 42, pressing plate 43 and screw 4
It consists of 4.

The pedestal 41 is fixed to the camera body 31 with screws 45 (see FIG. 1). A disk-shaped convex portion 41 a is formed on the upper surface of the pedestal 41, and the convex portion 41 a
A boss 41b having a screw hole 41bb is formed at the center of a. A positioning boss 41c is provided near the convex portion 41a.
Are formed. The elastic member 42 is a ring fitted to the boss 41b of the pedestal 41, and the holding plate 43 is fitted to the hole 43a fitted to the boss 41b similar to the elastic member 42 and the positioning boss 41c. Hole 4
3b and.

Ends 18A, 32 of the FPCs 17, 32
As for the structure of each of the board connecting portions 24 and 39 of A, as shown in FIG. 2, a hole 21 into which the boss 41b is fitted and a hole 22 into which the positioning boss 41c is fitted are provided in the movable end portion 18A. Also, similar holes 36 and 37 are formed in the end portion 32A. Then, in order to electrically connect the FPCs 17 and 32, the respective insulating films are peeled off in advance in an annular shape around the holes 21 and 36 on the mutually facing surfaces of the end portions 18A and 32A to form a copper foil. Expose the section,
The exposed copper foil portion (hatched portion) is plated with gold to form electric contact patterns 23 and 38.

Therefore, the FPCs 17 and 32 are connected to the end 1
When electrically connecting with 8A and 32A, the electric contact patterns 23 and 38 are brought into contact with each other to form the end portions 18A and 32.
A is overlaid, and in this state, the boss 41b is inserted into the holes 21 and 36.
And the bosses 41c are fitted into the holes 22 and 37, respectively, and the ends 18A and 32A are positioned on the pedestal 41. Then, the hole 43a of the pressing plate 43 is fitted to the boss 41b protruding from the hole 21 via the elastic member 42, and the hole 22a
The hole 43b of the pressing plate 43 is fitted into the more protruding boss 41c. Finally, the screw 44 is screwed into and fixed to the screw hole 41bb at the upper end of the boss 41b which is fitted and positioned in the hole 43a of the pressing plate 43. The head of screw 44 is boss 41
By being fixed to the upper end surface of b, the end portions 18A, 32
A, the elastic member 42, and the pressing plate 43 are in close contact with each other while being prevented from coming off from the boss 41b.
3 and 38 are securely connected electrically. Since the elastic member 42 is interposed, uniform pressing force can be obtained between the both end portions 18A and 32A, so that the electric contact patterns 23, 3
A very stable conduction state can be obtained between 8 times.

When another end of another FPC is superposed on the movable end 18A of the FPC 17 for electrical connection with each other, electrical contacts are provided on both sides of the movable end 18A. A pattern may be formed. With this configuration, even when a plurality of FPCs are connected to each other, the electrical connection between them is stably performed, and the number of contacts of the electrical contact pattern formed on one surface is, for example, that of the electrical contact pattern having a diameter of 6 mm. In that case, about 12 contacts are possible (Fig. 2
The electrical contact patterns 23 and 38 shown in Figure 6 have 6 contacts.) When three FPCs are stacked, one connection will produce 24
Allows electrical connection of contacts. Therefore, in such a case, conventionally, 24 lead wires are connected by soldering at 48 positions on both ends thereof, but since such soldering is not necessary in the present embodiment, many electric signal lines are provided. It is obvious that the effect is great. Also in this embodiment, in practice, as described later, the end portion 32 is
Another electric contact pattern is formed on the back surface of the surface on which the electric contact pattern 38 of A is formed.
Connected to the electrical contact pattern of the PC, 3 FPCs
It has a structure in which it is connected at several locations.

The end portions 18A and 32A electrically and mechanically connected by the connecting device 40 are arranged at predetermined positions of the camera body 31 to which the pedestal 41 is fixed, as shown in FIG. An opening 26 is provided in the upper plate 11 at a portion facing this position, and a detachable lid member 27 that normally covers and closes the opening 26 is attached to the opening 26. Therefore, by removing the lid member 27, the portion of the connection device 40 in which all the signal lines are concentrated is exposed at the opening 26, so that the lid member 27 can be removed without removing the upper plate 11 even after the assembly of the camera is completed. The connection device 40 can be repaired and inspected simply by removing it.

In FIG. 1, the F of the main body unit 30 is
The PC 32 is the FPC1 of the upper plate unit 20 at the end 32A.
The movable end portion 18A of No. 7 and the connecting device 40 are connected to each other. In this embodiment, the function of the FPC 32 is further decomposed and divided into several modules, so that an input / output device and a power feeding device are provided. The efficiency of the function has been improved. This will be described next with reference to FIG.

As shown in FIG. 3, the body unit 30 is
Central processing module 51 including the CPU 34, AF control module 52, aperture control module 53, shutter control module 54, power supply module 55 and DX
The code reading module 56 is disassembled into each module. The central processing module 51 is the CPU 3 described above.
4 and the FPC 32 and the like. And the central processing module 51 and each module 5
2, 53, 54, 55 and 56 are connection devices 57 to 6 shown in FIG. 3 and having the same configuration as the connection device 40.
Connected by 1. Outputs of the input / output device, the arithmetic storage device, the information display device, etc. configured in the upper plate unit 20 are sent to the main body unit 30 as control input data through the connection device 62 and processed by the respective modules 51 to 56. The control output data of each module is sent to the upper plate unit 20 through the connecting device 63. In this embodiment, the connecting devices 62 and 63 are composed of one connecting device 40 as described in FIGS. 1 and 2 above.
Of course, two connection devices may be used. Further, the main body unit 30 and the upper plate unit 20 can be connected to the external systems 66 and 67, respectively, but the connection device described above can also be used when connecting to these external systems.

Since the camera to which the present invention is applied is constructed in this manner, it goes without saying that it is desirable that the above-mentioned modules are independent as electrical mounting parts.

Therefore, a more specific structure of the main body unit 30 will be described with reference to FIGS.

FIGS. 4 and 5 are views of a portion of the camera body 31 having the mirror box portion and the front plate portion as seen from the rear and the front, respectively, and FIG. 6 is shown in FIG.
It is the figure which looked at the part which has a shutter unit part of 1 and a film feeding part from the front. That is, the main body unit 30 shown in FIG. 1 includes a first unit portion 30A (mirror box unit) shown in FIGS. 4 and 5 and a second unit portion shown in FIG.
It is divided into two units 30B.

In FIG. 4, the first unit section 30A passes through at least a mirror means for guiding the light flux that has passed through the taking lens to the finder optical system, and a semi-transmissive mirror section provided substantially in the center of the mirror means. A mirror box unit is provided in which a mirror box 70 having an auxiliary mirror for guiding a part of the photographing light flux to the AF means is arranged.

On the lower surface of the mirror box 70, an AF sensor base 71, which supports an unillustrated light receiving element for autofocus (hereinafter referred to as an AF sensor), has a hexagonal head and a cross-shaped recess at the center. Adjusting screw 7
It is attached so as to be adjustable by means of 2, and the tilt of the AF sensor and the position in the optical axis direction are adjusted by the rotation of the adjusting screw 72. From the bottom surface of the mirror box 70 including the AF sensor base 71, the mirror box 70
The FPC 74 is attached to one side surface and the back surface of the front plate 73. The FPC 74 constitutes the AF control module 52 (see FIG. 3).
An AF CPU 75, an analog IC 76, an adjustment semi-fixed resistor 77, etc. are arranged on the 74. A large number of check patterns 78 (check land means) made of a copper foil portion are formed on the front and back sides of the end of the FPC 74 located on the side of the front plate 73. As a result, the check can be performed by the mirror box 70 alone,
Furthermore, even after the first unit portion 30A shown in FIGS. 4 and 5 is assembled to the second unit portion 30B shown in FIG.
This check pattern 78 enables checking. At the upper position of the portion of the FPC 74 attached to the front plate 73, the board connecting portion 39 (including the electric contact pattern 38 (23) and the holes 36 (21) and 37 (22) shown in FIG. 2 is formed. 24), which has the same structure as that of 24), and includes a board connecting portion 82 including an electric contact pattern 79 and holes 80 and 81
Are formed. Bosses 83, 8 fixed to the front plate 73
The board connecting portion 82 is positioned by fitting 4 into the holes 80 and 81. This board connecting portion 82
Is a board connecting portion 85 of a bent end portion 32B that is formed by bending to the front side adjacent to the end portion 32A of the FPC 32.
Connected to The board connecting portion 85 also has a similar structure including an electric contact pattern 86 and holes 87 and 88.
Therefore, the board connecting portions 82, 8 of the FPCs 74, 32 are mutually connected.
5 is a state in which both electric contact patterns 79 and 86 are overlapped,
The elastic member 89, the pressing plate 90, and the screw 91 of the connecting device 57 are attached to the bosses 83 and 84 to be connected.

Further, as shown in FIG. 5, the aperture control module 53 is provided on the side of the mount 73a on the front surface of the front plate 73.
An FPC 93 that constitutes (see FIG. 3) is arranged.
A board connecting portion similar to the above is also formed on the upper end portion of the FPC 93, and a similar board connecting portion formed on an end portion 32C extending from a part of the FPC 32 to the front side, and FIG.
Connection is made by the connection device 58 by the connection method shown in FIG. A lead wire 95 is connected to the lower end of the FPC 93 by soldering, and the lead wire 95 is connected to a diaphragm mechanism (not shown).

Further, there is another FPC 33 below the FPC 32, and one end of the FPC 33 extends along one side surface of the mirror box 70 and is arranged on the same side surface, as shown in FIG. It is connected to the lead terminal of the light receiving element 96 for direct photometry. The same board connecting portions 97 and 98 as shown in FIG. 2 are also formed on the bent end portion 33A that is bent toward the front surface at the other end of the FPC 33. The board connecting portion 97 includes the shutter control module 54 (see FIG.
FP in the second unit section 30B, which constitutes the
The FPC 101 is a portion that is connected to the board connecting portion 100 formed at the extended end portion of C99 (see FIG. 6), and the board connecting portion 98 constitutes the power supply module 55 (see FIG. 3).
(See FIG. 6) Substrate connecting portion 102 formed at the extended end portion
It is the part that connects with. The board connecting portions 100 and 102 are mounted side by side on the front surface of the winding portion 103 of the second unit portion 30B, and are connected to the board connecting portions 97 and 98 and the method shown in FIG. 3)). It should be noted that the FPC 99 is the shutter control unit 10 on the front side of the shutter unit 104.
It is connected to the shutter control board 106 attached to the No. 5 by soldering. The FPC 101 is connected to the power supply device at a portion not shown in FIG.

Further, the second unit portion 30B shown in FIG.
At the film feeding section 108 in which there is a cartridge chamber for accommodating the film cartridge 107 (see FIG. 7).
Is provided with an FPC 109 that constitutes a DX code reading module 56 (see FIG. 3), and the board connecting portion 11 is provided at a portion arranged on the upper surface of the film feeding portion 108.
0 is formed. The board connecting portion 110 is connected to the board connecting portion 111 (see FIG. 4) formed at the end portion 32A of the FPC 32 of the first unit portion 30A by the method shown in FIG. That is, the board connecting portion 39 for connecting to the upper plate unit 20 described in FIGS. 1 and 2 is formed on the upper surface of the end portion 32A of the FPC 32, but the lower surface of the end portion 32A. A board connecting portion 111 for reading the DX code is formed on the. Therefore, the electrical contact pattern 2 of the board connecting portions 24, 39
The electric contact pattern 113 of the board connecting part 111 and the electric contact pattern 112 of the board connecting part 110 are connected at the lower surface position of the surface where the parts 3, 38 are connected to each other. The connection device 40 (see FIGS. 1 and 2) is used to connect these board connecting portions. The pedestal 41 of the connection device 40 is fixed to the upper surface of the film feeding unit 108 of the camera body 31.

The film feeding section 10 of the FPC 109.
8, a plurality of gold-plated copper foil contact portions 115 are formed on the front surface side of the plate 8. These copper foil contact portions 115 are, as shown in FIG. Are crimped and connected to each other. Each leaf spring member 1
The other end of 16 is spherically drawn to form a protrusion 116a. The protrusion 116a is formed by the leaf spring member 11
The urging force of 6 presses the DX code conductive foil portion 107a provided on the surface of the film cartridge 107 to obtain an electrical conduction state. The DX code signal read by the copper foil contact portion 115 through the leaf spring member 116 is FPC1.
It is decoded by the IC 117 on 09 and sent to the electric contact pattern 112 of the board connecting portion 110.

If the main body unit 30 side is disassembled into each electric component module as described above, the upper plate unit 2
It is possible to easily perform a check, etc., when an abnormality occurs in signal transmission / reception between 0 and the main body unit 30, or a check utilizing signal transmission / reception with the upper plate unit 20 in the process of assembling each module. .

Further, it is possible to realize an electrical mounting unit having a great number of advantages such as a function guarantee in each module, repair and replacement, and a great reduction in lead wire connection.

[0031]

As described above, according to the present invention, inspection (operation confirmation, quality inspection, etc.) can be performed on the mirror box unit alone, eliminating unnecessary assembly work and reducing man-hours. It is possible to provide a single-lens reflex camera that can be realized and can contribute to a reduction in manufacturing cost.

[Brief description of drawings]

FIG. 1 is an assembled front view of a camera according to an embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a connecting portion of the two FPCs shown in FIG.

FIG. 3 is a block diagram showing a state in which the main body unit in the embodiment shown in FIG. 1 is disassembled into a plurality of electric component modules.

FIG. 4 is a perspective view of a first unit portion of the main body unit shown in FIG.

5 is a perspective view of a first unit portion of the main body unit shown in FIG. 1 which is divided into two, as viewed from the front side.

FIG. 6 is a perspective view of a second unit portion of the main body unit shown in FIG. 1 divided into two, as viewed from the front side.

FIG. 7 is a horizontal plan view of the film feeding unit in FIG.

[Explanation of symbols]

11: Upper plate 12: Liquid crystal display panel (information display device) 16: Strobe contact (input / output device) 17: FPC (upper plate side flexible printed circuit board) 19: Touch switch (input / output device) 20 ... Upper plate unit 23 ... Electrical contact pattern (electrical contact) 24, 39, 82, 85, 97, 98, 100, 10
2, 110, 111 ... Board connecting portion 26 ... Opening portion 27 ... Lid member 30 ... Main body unit 30A ... First unit portion (mirror box unit) 30B ... Second unit portion 31 ... Camera body 32 , 33, 93, 99, 101, 109 ... FPC
(Body side flexible printed circuit board) 34 ... CPU (control circuit) 40, 57-63 ... Connection device (connection member) 74 ... FPC (mirror box side flexible printed circuit board; electric circuit board) 78 ... Check pattern (check) Land means)

Claims (1)

[Claims] 1. A mirror box unit detachably attached to a camera body unit, the mirror box unit having mirror means for guiding a light flux passing through a taking lens to a finder optical system, and the mirror box unit. A single-lens reflex camera, comprising: an electric board having a check land means capable of checking the electric function of the mirror box unit alone.