JPH10339904A - Mounting structure for camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide mounting structure for a camera being excellent in assemblability by preventing a failure in press-contact and the increase of the cost. SOLUTION: The mounting structure for the camera is constituted to provide a first flexible printed board 3 having first connecting patterns (3a and 3b), a second flexible printed board 4 having second connecting patterns (4a and 4b) which can be electrically connected to the first connecting patterns, press- contact members 5, 6 and 7 for bringing the first connecting patterns into press- contact with the second connecting patterns and a mirror box 1 for turnably supporting a main mirror 11 for guiding a photographing luminous flux to a finder optical system. In such a case, the first and second connecting patterns come into press-contact with each other in the plane surface part 15 of the mirror box 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a structure for mounting a flexible printed circuit board on a camera.

[0002]

2. Description of the Related Art In recent years, as the functions of cameras have become more sophisticated, the number of electric parts inside the camera and the substrates on which these electric parts are mounted have been increasing. At the same time, there is a demand for smaller layers of cameras, and how to efficiently arrange these electrical components and the boards on which the electrical components are mounted inside the camera is important for miniaturization of cameras. It is becoming a point. For this reason, a flexible printed circuit board which is excellent in flexibility and easy to bend is often used for the board.

[0003] As an electrical connection between flexible printed circuit boards, a method called pressure welding is often used. This is a method in which the connection patterns provided on the respective flexible printed boards are overlapped, and the connection patterns are made conductive by pressing the connection patterns with screws via elastic members such as rubber.

Further, a method has been proposed in which the flexibility of the flexible printed circuit board is used to bend the flexible printed circuit board by 180 ° in a limited space to substantially double the mounting area.

[0005]

However, when a flat portion is formed of a plastic material, there is a problem that even a slight swell generated at the time of molding adversely affects the pressure welding, resulting in poor pressure welding. In addition, there is a problem in that if the desired flatness is to be achieved, the molding conditions are extremely severe, and the productivity is deteriorated. The use of a metal plate provides flatness, but not only increases the number of components but also reduces the mounting space inside the camera.

In addition, the flexible printed circuit board bent at 180 ° has a strong warp, and the more patterns that pass through the bent portion, the stronger the warp becomes, and the assemblability deteriorates. In addition, when the bending grease is forcibly applied, the pattern may be disconnected.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to provide a camera mounting structure which prevents pressure contact failure, prevents cost increase, and is excellent in assemblability.

[0008]

According to a first aspect of the present invention, there is provided a first flexible printed circuit board (3) provided with first connection patterns (3a, 3b).
A second flexible printed circuit board (4) provided with a second connection pattern (4a, 4b) electrically connectable to the connection pattern; and a pressure contact member (5, 4) for pressing the first connection pattern and the second connection pattern. 6, 7) and a mirror box (1) rotatably supporting a main mirror (11) for guiding a photographing light beam to a finder optical system, and a first connection pattern (3a, 3b) and a second connection pattern. (4a, 4
b) is characterized in that it is pressed against the flat part (15) of the mirror box.

According to a second aspect of the present invention, in the first aspect, the second flexible printed board (4) has a folded portion (4f) of approximately 180 °, and the first connection pattern (4a, 4b).
Is a folded portion (4f) of approximately 180 °, or approximately 180
At least the end opposite to the folded part (4f)
It is characterized in that it is provided on one side.

According to a third aspect of the present invention, in the first aspect, the flat portion (15) is an outer surface of a side wall portion of the mirror box (1).

According to a fourth aspect of the present invention, in the first aspect, the mirror box (1) is characterized in that at least the flat portion (15) is a metal plate.

According to a fifth aspect of the present invention, in the third aspect, the first connection pattern and the second connection pattern are mirror boxes (1).
A flat portion (15) of a metal plate for supporting a rotation restricting member (13) of a main mirror disposed on the outer surface of the side wall portion
Characterized by being pressed against.

[0013]

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

FIGS. 1 to 3 are a perspective view, a central vertical section and a horizontal section showing an embodiment of a camera mounting structure according to the present invention. The chain dot gland in FIG. 2 represents the outline of the appearance of the camera.

In FIG. 1, a front body 1 includes a support 1a of a mount on which a photographing lens is mounted and a mirror box 1b.
It is composed of Inside the mirror box 1b, a main mirror 11 for guiding a photographing light beam to a finder optical system is rotatably supported, and a sub mirror 12 is rotatably supported by the main mirror 11. The sub mirror 12 is a mirror for guiding a light beam to the auto focus module 3d. As shown in FIG. 2, the rotation of the main mirror 11 is restricted by the rotation restricting member 13. The rotation of the sub-mirror 12 is restricted by the rotation restricting member 14. The rotation restricting members 13 and 14 are configured by eccentric pins so that the positions can be adjusted, and are caulked to the metal plate 15. Note that the rotation limiting members 13 and 14 cannot be made into a mirror box 1b so that the position can be adjusted, and a metal plate 15 for caulking is required.

On the left side of the front body 1 (FIGS. 1 and 3), a flexible printed circuit board 3 is arranged, and an autofocus module 3d provided below the front body 1 is mounted (FIG. 1). ). The flexible printed circuit board 3 is located outside the optical axis center L (left side in FIG. 1).
And two connection patterns 3a and a connection pattern 3b (not shown) having a similar pattern shape on the back surface (the right side in FIG. 1).
In the center of the connection pattern 3a (3b),
Each has a boss hole 3c.

Above the front body 1 (FIG. 1), a flexible printed circuit board 4 that extends so as to straddle the front body 1 is arranged. The flexible printed circuit board 4 has a 180 ° folded portion 4f so as to sandwich the flexible printed circuit board 3 on the left side of the front body (FIGS. 1 and 3). (Left side in FIG. 1).
On the left side (FIG. 1) of the front body 1, a main microcomputer 4d is mounted on the opposite side. Two connection patterns 4a (shown by broken lines) are provided inside the 180 ° folded portion 4f of the flexible printed circuit board 4, and a portion of the flexible printed circuit board 4 opposed to the two connection patterns 4a is provided. Two connection patterns 4b having the same shape are provided on the inner surface (the right side in FIG. 1). Two boss holes 4c1 and 4c2 are provided at the centers of the connection patterns 4a and 4b, respectively.

The two boss holes 3c provided in the flexible printed board 3 and the two boss holes 4c1 and 4c2 provided in the flexible printed board are
5 are respectively fitted to two bosses 16. In the fitted state, the connection pattern 3a provided on the flexible printed circuit board 3 and the connection pattern 4a provided on the flexible printed circuit board 4 are in contact with each other. Similarly, the connection patterns 3b and 4b are designed to be in contact with each other.

With the flexible printed circuit board 3 and the flexible printed circuit board 4 fitted to the boss 16, the pressing rubber 5 and the pressing plate 6 are sequentially fitted to the boss 16,
Finally, the screw 7 is inserted into the screw hole 16 provided in the center of the boss 16.
Screw into a. By screwing the screw 7, the pressing plate 6 elastically deforms the pressing rubber 5 between the pressing rubber 5 and the flat drawing portion of the metal plate 15. The connection pattern 3a and the connection pattern 4a are pressed against each other by the elastic compression force generated as a result. The connection pattern 3b and the connection pattern 4b are pressed. Thereby, the flexible printed board 3 and the flexible printed board 4 can be electrically connected.
At the time of pressing, the screw 7 is connected to the flexible printed circuit board 4.
Since the warp of the 180 ° folded portion 4f is suppressed, the assembling becomes easy.

Generally, the flexible printed circuit board 3 is assembled with the auto focus module 3d (FIG. 1) mounted thereon. This is to facilitate the inspection of the autofocus module 3d and the assembling to the front body. In addition, the autofocus module 3d and the main microcomputer 4d require many connection lines. Therefore, the flexible printed circuit board 3 on which the autofocus module 3d is mounted and the main microcomputer 4
The flexible printed circuit board 4 on which d is mounted has to be separated and needs to be connected by some kind of electrical connection means.

The focal plane shutter unit 8 is provided on the left side (FIG. 3) of the mirror box 1b. The rear body 9 includes a film chamber 9a, a film winding chamber 9b, and an aperture opening 9c. With the front body 1 and the rear body 9 docked, a gap 10 exists between the film chamber 9a and the mirror box 1b (see FIG. 3). Increasing the gap 10, that is, moving the film chamber 9 a to the outside (the left side in FIG. 3) increases the width of the camera.
It is desirable that the gap 10 is as narrow as possible. However, from the width required by the focal plane shutter 8, the position of the film chamber 9a on the inner side is determined.
There is a gap 10 having a certain width. Therefore, when it is desired to increase the mounting area in the gap 10, the flexible printed circuit board must be set at 180 ° as in the above-described embodiment.
It is effective to bend and insert into the gap 10.

In the above-described embodiment, the case where the metal plate 15 for caulking the rotation restricting members 13 and 14 has been described, but the metal plate 15 for caulking the rotation restricting members 13 and 14 is required. When there is no mirror box, or when the entire mirror box 1 is made of a metal plate, the connection patterns 3a and the connection patterns 4a can be pressed against each other on the outer surface (flat portion) of the side wall.

[0023]

As described above, according to the camera mounting structure of the present invention, the first connection pattern (3a, 3b) and the second connection pattern (4a, 4b) are connected to the plane portion (15) of the mirror box. In this case, the pressure contact is made, that is, the flatness of the flat portion (15) is utilized, so that it is possible to prevent poor press contact. Further, since no new parts are required, an increase in cost can be prevented.

According to the second aspect of the present invention, the warp of the 180 ° bent portion of the flexible printed circuit board is suppressed by using the press contact, so that the assemblability can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a camera mounting structure according to the present invention.

FIG. 2 is a central longitudinal sectional view showing one embodiment of a camera mounting structure according to the present invention.

FIG. 3 is a horizontal sectional view showing an embodiment of a camera mounting structure according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 front body 1a mount mounting portion 1b mirror box 3 flexible printed circuit board 3a connection pattern 3b connection pattern 3c boss hole 3d autofocus module 4 flexible printed circuit board 4a connection pattern 4b connection pattern 4c1 boss hole 4c2 boss hole 4d main microcomputer 4e electric component 4f 180 ° folded portion 5 press rubber 6 press plate 7 screw 8 focal plane shutter 9 rear body 9a film chamber 9b film take-up chamber 9c aperture opening 10 gap 11 main mirror 12 sub mirror 13 main mirror rotation restricting member 14 sub mirror rotation restricting member 15 Metal plate 16 Boss 16a Screw hole

Claims (5)

[Claims] A first flexible printed circuit board provided with a first connection pattern; a second flexible printed circuit board provided with a second connection pattern electrically connectable to the first connection pattern; A pressing member for pressing the connection pattern and the second connection pattern, and a mirror box rotatably supporting a main mirror for guiding a photographic light beam to a finder optical system, wherein the first connection pattern and the second connection are provided. The mounting structure of the camera, wherein the pattern is pressed against a flat portion of the mirror box. 2. The second flexible printed circuit board has a folded portion of approximately 180 °, and the first connection pattern is formed of the folded portion of approximately 180 ° or the folded portion of approximately 180 °.
The mounting structure of the camera according to claim 1, wherein the mounting structure is provided at least on the negative side of the end portion facing the turn-back portion of the camera. 3. The camera mounting structure according to claim 1, wherein the flat portion is an outer surface of a side wall portion of the mirror box. 4. The camera mounting structure according to claim 1, wherein the mirror box has at least the flat portion made of a metal plate. 5. The first connection pattern and the second connection pattern are pressed against a flat portion of a metal plate for supporting a rotation restricting member of the main mirror disposed on an outer surface of a side wall of the mirror box. The mounting structure of the camera according to claim 3, wherein: