JPH10177203A - Electrical parts mount structure for camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently assemble and mount hard printed circuit boards with electrical parts mounted in a camera in a desired state, also, to reduce the cost and to improve the assemblage. SOLUTION: In a gap space between a film traveling path 6 formed inside the rear part of the camera 1 and an outer packaging member 12 for forming the camera rear part, the 1st hard printed circuit board 20 with main electrical parts of the camera mounted is arranged. In the grip part 11a of the camera, a 2nd hard printed circuit board 21 with a camera strobe circuit and a DC/DC converter circuit, etc., mounted is arranged so as to be nearly vertical to the 1st hard printed circuit board. In a state where the 1st and 2nd hard printed circuit boards are separately fixed on the camera body 4, the 1st and 2nd hard printed circuit boards are made to abut in the nearly vertical state, and both hard printed circuit boards are electrically connected by soldering the abut part while mutually positioning the circuit boards.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure of an electric component comprising a printed circuit board on which various electric components are mounted in a camera.

[0002]

2. Description of the Related Art In recent years, the size of cameras has been further reduced, and in order to use the space inside the camera as effectively as possible, various types of electric components and printed circuit boards having these electric components mounted thereon have been developed. Ingenuity has been taken in placement.

For example, Japanese Utility Model Laid-Open Publication No. 63-88836 discloses that an electric component thinner than a battery (battery) is arranged in a space formed behind a battery chamber on a side surface of a grip portion of the camera. The mounting components can be arranged without increasing the width.

In general, the space near the side surface of such a grip portion is close to a battery or a capacitor, so that a strobe circuit and a DC / DC converter circuit are often arranged. These circuits are connected to a microcomputer (a so-called microcomputer). Since such a strobe circuit and a DC / DC converter circuit carry a large current, they are mounted alone on a hard printed circuit board in order to reduce the influence of noise on other circuits. It is common to place it near.

On the other hand, Japanese Patent Application Laid-Open No. Hei 6-258701 discloses a rigid printed circuit board in a clearance space on the back side of a film passage inside a camera and inside an exterior member forming a back surface of the camera, substantially in parallel with the film passage. Are arranged. With such a structure, a relatively large space inside the back of the camera is effectively used, and by mounting a large number of mounted electrical components on this board,
The use and area of a flexible printed circuit board (hereinafter, referred to as FPC) can be reduced, and the bent portion of the FPC can be reduced.

[0006]

In the latter Japanese Patent Application Laid-Open No. 6-258701, the rigid printed circuit board provided inside the camera back has no flexibility. It was necessary to use an FPC as a relay means for electrical connection with a hard printed circuit board arranged at a position separated from the hard printed circuit board.
Therefore, there is a problem that the cost is increased and the assemblability is reduced as compared with the case where the relay FPC is not used.

In particular, when mounting various electric components in a camera, it is desirable to use a large number of rigid printed circuit boards. However, FPCs are also used because of space problems and electric connection means. Therefore, it is necessary to take some measure that can solve the above-mentioned problem.

The present invention has been made in view of such circumstances, and various electric components can be mounted on a hard printed circuit board, and can be compactly mounted in a camera in a required state in a required state. It is an object of the present invention to obtain a camera electric component mounting structure which is inexpensive and has excellent assemblability.

Further, in the present invention, when arranging a strobe circuit or a DC / DC converter circuit which is likely to be a noise source due to a large current flowing, the influence of noise and the like on other circuit components can be minimized. An object of the present invention is to obtain an electronic component mounting structure of a camera.

[0010]

SUMMARY OF THE INVENTION In order to meet such an object, an electronic component mounting structure for a camera according to the present invention comprises a film traveling passage formed inside a rear portion of the camera and an exterior member forming a rear portion of the camera. A first rigid printed circuit board disposed in a gap space between the first rigid printed circuit board and a main electric component of the camera mounted thereon, and a second rigid printed circuit board disposed substantially perpendicular to the first rigid printed circuit board in a grip portion of the camera A printed circuit board; and a camera body for fixing the first and second rigid printed boards. The first and second rigid printed boards are fixed with the first and second hard printed boards fixed to the camera body. By contacting in a substantially vertical state,
The first and second rigid printed circuit boards are electrically connected to each other by an electrical connection portion in a state where they are positioned relative to each other at the contact portion.

In the electronic component mounting structure for a camera according to the present invention, the electrical connection at the contact portions of the first and second rigid printed circuit boards is constituted by a solder connection portion, and the solder connection portion is formed on the back surface of the grip portion of the camera. It is provided on the inner portion corresponding to the side bulge. Further, in the electrical component mounting structure of the camera according to the present invention, the electrical connection at the contact portion between the first and second rigid printed circuit boards is configured by the connector connection portion. Here, the strobe circuit of the camera and the DC / D
A circuit including at least one of the C converter circuits is mounted.

According to the present invention, the first rigid printed circuit board on which the main electric components of the camera are mounted is disposed inside the rear part of the camera and on the back side of the film path, and the second rigid printed circuit board is disposed inside the side part of the grip part. Along with placing a hard printed circuit board,
These rigid printed circuit boards are fixed to the camera body and are brought into substantially vertical contact with each other, and electrical connection portions such as solder connection portions for making electrical connection at the contact portions are provided. The cost can be reduced by the amount that no FPC is required.

Further, according to the present invention, when the electrical connection is formed by the solder connection portion, the connection portion by the solder is reduced to half compared with the case where the relay FPC is used, and the both substrates are fixed to the body. Since the positioning of the solder connection portion can be performed at the time of assembly, the assemblability can be improved.

[0014]

1 to 3 show a first embodiment of an electric component mounting structure for a camera according to the present invention. In these figures, reference numeral 1 denotes a single-lens reflex type still camera using a film cartridge 2 by, for example, an advanced photo system.

As is widely known, the camera 1 has a lens barrel (not shown) mounted at a substantially central portion of a front portion. A mirror box 3 containing a 45 ° quick return mirror (not shown) for guiding the optical path of the lens of the lens barrel to the finder optical system is provided at the center. On the left side of the figure, a film cartridge chamber 4a for loading the film cartridge 2 is provided near one side of the camera body 4. Reference numeral 5 denotes a lid which is configured to open and close one side of the back of the camera 1 corresponding to the chamber 4a. By opening the lid 5, the film cartridge 2 can be loaded into the cartridge chamber 3.

Reference numeral 4b denotes a spool chamber provided by the camera body 4 provided on the opposite side (right side in the figure) of the mirror box 3 corresponding to the film cartridge chamber 4a. Reference numeral 6 denotes a film traveling path. 4a
It is formed between a spool 4b1 having a spool 4b1 for winding up a film 2a which is fed from the film cartridge 2 loaded in the cartridge and runs. The film running passage 6 is formed between the film rail surface 4c and the pressure plate 7 facing the film rail surface 4c with a predetermined gap.

Reference numeral 8 denotes a film pressing member for pressing the film 2a against the spool 4b1 in the spool chamber 4b, and reference numeral 9 denotes a spool chamber cover for supporting the film pressing member 8. Then, the film 2a is sent out from the cartridge 2, passes through the passage 6, and enters the spool chamber 4b.
The rotation of the spool 4b1 causes the spool 4b1 to be sequentially wound around the outer periphery. It should be noted that the rotation of the shaft 4 for sending out the film 2a from the cartridge 2 and the spool 4b
The rotation of 1 is performed automatically by the camera.

The exterior member of the camera 1 is shown by an imaginary line in FIG. 1 and has a widely known shape. That is,
On the right side in the figure, a grip portion 11 swelling to the front of the camera 1.
a is formed by the grip portion cover 11a.
The camera 1 includes a camera front cover 10 that forms a front part and left and right side parts of the camera 1, and a camera rear cover 12 that forms a part of the rear part of the camera 1 excluding the lid 5. In FIG. 2, reference numeral 13 denotes a shutter blade storage unit for storing shutter blades, and reference numeral 13a denotes a shutter driving unit.

Inside the grip portion 11a of the camera 1, a main capacitor 15 for storing electricity for light emission of a built-in strobe (not shown) attached to the camera 1 is widely known, for example, as shown in FIG. Two batteries 16 such as a CR123A type lithium battery are provided inside by utilizing the internal space of this portion.

A single hard printed circuit board 20 is arranged along the width direction of the camera 1 between the rear side of the film running path 6, that is, between the pressure plate 7 and the back cover 12 which is the back portion of the camera 1. I have. In particular, in such a configuration, it is not necessary to open the cover 5 except for the lid 5 for loading the film cartridge 2, so that a relatively large space on the rear side of the camera 1 is used for the rigid printed circuit board 20 for mounting electric components. It can be secured as a mounting space.

A main microcomputer 20a, a connector 20b, and a number of main electric components 20c are mounted on the surface of the hard printed circuit board 20 on the back surface (back cover 12) side. The main electric component 20c is also mounted on the substrate surface opposite to this surface.

A portion of the camera 1 near the side of the grip portion 11a is provided with the rigid printed circuit board 20 on the rear side.
A second hard printed circuit board 21 different from the above is disposed so as to contact the first substrate 20 substantially vertically. The second rigid printed circuit board 21 is connected to the grip 11a.
Of the capacitor 15 and the battery 1
It is arranged in a position avoiding 6,16. These first and second rigid printed circuit boards 20 and 21 are respectively fixed to a part of the camera body 4 by fastening parts such as screws (see 25 in FIG. 3), and are in substantially vertical contact in this state. .

Here, on the first rigid printed circuit board 20, a main microcomputer 20a, a connector 20b, and many other main electric components 20c are mounted. The second hard printed circuit board 21 has a strobe circuit and a D
A transformer 21a, a coil 21b, and other electric components 21c necessary for the C / DC converter circuit are mounted.
In the figure, reference numeral 23 denotes an external connection terminal formed at an end of the substrate 21.

The above-described strobe circuit is a circuit for controlling light emission of a strobe (not shown) built in the camera 1, and the DC / DC converter circuit is a circuit for supplying a stable power supply to the camera 1. . In addition, 10a in FIG.
Is a warship section containing a pentaprism and the like of the camera 1, and the strobe is often attached to this section.

In the present invention, the first and second rigid printed circuit boards 20 and 21 of the camera 1 having the above-described configuration are arranged so as to abut substantially vertically as shown in FIGS. 1, 2 and 3. At the same time, a solder connection portion 22 is provided as an electrical connection portion for ensuring an electrical connection state between the substrates 20 and 21 at the contact portion.

Therefore, these rigid printed circuit boards 2
According to 0 and 21, the relay FPC conventionally used for the electrical connection between the two substrates 20 and 21 can be omitted, and the cost can be reduced. Further, when the above-described relay FPC is used, an electrical connection between the FPC and each of the boards 20 and 21 is required. This is achieved by a direct electrical connection between the boards 20 and 21. One time is sufficient, and for example, the number of connections by soldering can be reduced to half that in the case where the relay FPC is used.

That is, as shown in FIG. 3, a solder connection for electrically connecting the first rigid printed circuit board 20 and the second rigid printed circuit board 21 to an abutting portion thereof. A part 22 is provided. In this example, the number of connections is thirteen.

For example, when a relay FPC is used, the number of solder connections between the relay FPC and the first rigid printed circuit board 20 is 13, and similarly, the number of solder connections between the relay FPC and the second rigid printed circuit board 21 is 13. , A total of 26 solder connections are required. However, in this example, both substrates 20, 21
Can be directly and electrically connected, so that the number of connections by soldering is only thirteen. In addition, the solder connection operation is facilitated by previously positioning the solder connection portions 22 of the both boards 20 and 21 in a state where both the boards 20 and 21 are fixed to the camera body 4. Also, for the reasons described above, a significant improvement in assemblability can be achieved.

In the above-described configuration, the circuit component 21 serving as a strobe circuit and a DC / DC converter circuit
a to 21c are mounted on the second rigid printed circuit board 21.
It will be described below that it is appropriate to arrange in a space closer to the rear surface of the side surface portion of the grip portion 11a and thinner than the width of the battery 16 behind the battery 16.

(1) Main capacitor 15 and battery 16
Since is a cylindrical shape, it is advantageous to dispose it inside the arc-shaped grip portion 11a in order to effectively use the space in the camera 1. In the strobe circuit and the DC / DC converter circuit which need to be electrically connected to the main capacitor 15 and the battery 16, a large current flows through the connection line, so that noise may be generated. Therefore, such a strobe circuit or D
It is desirable that the C / DC converter circuit is disposed inside the grip portion 11a as close as possible to the main capacitor 15 and the battery 16.

(2) The strobe circuit and the DC / DC converter circuit on the second rigid printed board 2
a, height of parts such as coil 21b is about 10mm
The electric parts of the front and rear cameras are constituted by relatively tall parts. On the other hand, since the diameter of the battery 16 is about 17 mm, the space formed behind the battery 16 at the side of the grip portion 11a near the rear surface of the side of the grip portion 11a is for mounting electric components thinner than 17 mm. Suitable as space.

FIGS. 4 to 6 show a second embodiment of the electrical component mounting structure of the camera according to the present invention. In these drawings, the same or corresponding portions as those in the above-described embodiment are denoted by the same reference numerals, and description thereof will be omitted. Only the differences will be described below. That is, as shown in FIG. 4, in the rear cover 12 which is an exterior member of the camera 1, the upper part of the rear side corresponding to the grip part 11 a is provided with a hook part of a thumb for increasing the stability when the camera 1 is held. Some bulges 30 are provided.

In the camera 1 having such a bulge 30, as shown in FIG. 5, an extension 31 of the second rigid printed circuit board 21 is provided in a space inside the bulge 30,
A notch 32 is provided in the first rigid printed circuit board so that the extension 31 does not interfere. In addition, extension 3
As shown in FIG. 6, a solder connection portion 22 for making an electrical connection between the two substrates 20 and 21 is provided at a contact portion between the first and the first hard printed circuit boards 21.

According to such a configuration, when the mounting area of the second hard printed circuit board 21 is insufficient in the first embodiment, it is possible to secure a sufficient mounting area while realizing good holding. There is an advantage that you can.

FIGS. 7 to 9 show a third embodiment of the present invention. In this embodiment, a bulging portion 4 which is a portion to be hooked by a thumb from the upper end to the lower end is provided on the rear side portion of the grip portion 11a in the rear cover 12 of the camera 1.
0 is formed. In this embodiment, the bulge 4
The extended portion 41 is provided on the second rigid printed circuit board 21 by utilizing the inner space by 0. And both substrates 2
Solder connecting portions 22 for electrically connecting the substrates to each other are provided at the contact portions 0 and 21.

According to such a configuration, the mounting area of the second rigid printed circuit board 21 can be further increased as compared with the above-described second embodiment.

FIGS. 10 and 11 show a fourth embodiment of the present invention. In the first embodiment, first and second rigid printed circuit boards 20 and
This is an example in which a connector 50 is employed in a contact portion 21. It is needless to say that such a configuration also improves the assemblability and provides the same operation and effect as those of the above-described embodiment.

The present invention is not limited to the structure described in the above embodiment, and it goes without saying that the shape, structure, etc. of each part can be appropriately modified or changed. For example, in the above-described embodiment, a part of the back of the camera 1
Is opened and the film cartridge 2 is loaded and unloaded, but if the film cartridge 2 is loaded and unloaded from the upper or lower surface of the camera 1, the first rigid printed circuit board 20 Can be arranged. By doing so, the mounting area of the first rigid printed circuit board 20 can be further increased.

Further, in the above-described embodiment, the description has been made using the single-lens reflex camera 1 using the film cartridge by the advanced photo system. However, the present invention is not limited to this. It is also applicable.

[0040]

As described above, according to the electric component mounting structure of the camera according to the present invention, the first hard print in which the main electric components of the camera are mounted inside the rear portion of the camera and on the back side of the film path. The substrate is disposed, the second hard printed circuit board is disposed in the grip portion, and both of the rigid printed circuit boards are fixed to the camera body, and are brought into substantially vertical contact with each other. Since the components are electrically connected, the cost can be reduced by the amount that the conventional FPC for relay is not required.

Further, according to the present invention, by forming the electric connection portion with the solder connection portion, the electric connection between the two rigid printed circuit boards can be more electrically connected than the case where the relay FPC is used. Halves the number of connections, and the positioning of the solder connection portion can be performed when the two substrates are fixed to the body, so that the assemblability can be improved. When a connector connection portion is used instead of such a solder connection portion, the number of components increases, but the assemblability also improves.

Further, according to the present invention, the first rigid printed circuit board on which the main electric components of the camera are mounted is arranged inside the rear surface of the camera to secure an area where various electric components can be mounted. Connected approximately perpendicularly to the second
By mounting a circuit including at least one of a camera strobe circuit and a DC / DC converter circuit on which a large current easily flows and becomes a noise source on a rigid printed circuit board, the influence of noise and the like on other circuit components is minimized. be able to. In addition, although such a strobe circuit or a DC / DC converter circuit has relatively large components, it is possible to effectively use the space inside the side surface of the grip portion of the camera, and to provide electric components to the camera. It is effective in incorporating.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part showing a first embodiment of an electric component mounting structure of a camera according to the present invention.

FIG. 2 is a cross-sectional view of a main part of FIG.

FIG. 3 is a side view of FIG. 1 as viewed from the side.

FIG. 4 is a perspective view showing a second embodiment of the electric component mounting structure of the camera according to the present invention, and showing an external appearance of the camera to which the present invention is applied;

FIG. 5 is a perspective view corresponding to FIG. 1 in a second embodiment of the present invention.

FIG. 6 is a cross-sectional view of FIG.

FIG. 7 is a perspective view showing a third embodiment of an electric component mounting structure of a camera according to the present invention, and showing an external appearance of a camera to which the present invention is applied;

FIG. 8 is a perspective view corresponding to FIGS. 1 and 5 in a third embodiment of the present invention.

FIG. 9 is a cross-sectional view of FIG.

FIG. 10 is an essential part enlarged sectional view showing a fourth embodiment of the electric component mounting structure of the camera according to the present invention.

FIG. 11 shows a fourth embodiment according to FIG. 10;
It is a side view corresponding to FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Camera, 2 ... Film cartridge, 2a ... Film, 3 ... Mirror box, 4 ... Camera body, 4a ... Film cartridge room, 4b ... Spool room, 5 ... Lid,
Reference numeral 6: film traveling path, 7: pressure plate, 10: camera front cover, 11: grip part cover, 11a: grip part,
12: camera back cover (rear part), 15: capacitor, 16: battery, 20: first rigid printed circuit board,
Reference numerals 20a to 20c: electric parts, 21: second rigid printed circuit board, 21a to 21c: electric parts, 22: solder connection part (electric connection part), 30: bulging part, 31: extension part, 32 ...
Notch, 40 ... bulge, 41 ... extension, 50 ... connector (electrical connection).

Claims (4)

[Claims] 1. A first hard print which is disposed in a gap between a film running path formed inside a rear portion of a camera and an exterior member forming a rear portion of the camera, and on which main electric components of the camera are mounted. A substrate, a second rigid printed circuit board disposed substantially perpendicular to the first rigid printed circuit board within a grip portion of the camera, and a camera body for fixing the first and second rigid printed circuit boards; The first and second rigid printed circuit boards are brought into contact with each other in a substantially vertical state with the first and second rigid printed circuit boards fixed to the camera body. An electrical component mounting structure for a camera, wherein the two rigid printed circuit boards are electrically connected to each other by an electrical connecting portion while being positioned with respect to each other. 2. The electronic component mounting structure for a camera according to claim 1, wherein a solder connection portion is provided at a contact portion between the first and second hard printed circuit boards, and the solder connection portion is provided on a back side of a grip portion of the camera. An electrical component mounting structure for a camera, wherein the electrical component mounting structure is provided inside a bulging portion. 3. The camera according to claim 1, wherein the electrical connection at the contact portions of the first and second hard printed circuit boards is constituted by a connector connection portion. Component mounting structure. 4. The electronic component mounting structure for a camera according to claim 1, 2 or 3, wherein a strobe circuit of the camera, D
An electrical component mounting structure for a camera, comprising a circuit including at least one of a C / DC converter circuit.