JPH07225421A - Camera - Google Patents

Abstract

PURPOSE:To mount parts at a high density by securing a wide plane part on an FPC board at the time of connecting the FPC board to be installed along a sidewall surface in a camera to the package board through a connector. CONSTITUTION:The FPC board 2 arranged along the inclined sidewall surface 1a of a roof prism 1, etc., constituting a finder optical system and a rigid board 5 arranged so as to nearly orthogonally cross the board 2 are provided. On the part adjacent to the sidewall surface 1a on the board surface 5a, a horizontal electrical connector 6 is provided. One end part 2a of the FPC board connected to the connector 6 is bent to a roughly N-shape at least by the bending parts 10 and 11 of two places and connected to the connector in the state where one end part 2a is applied with the permanent deformation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera suitable for application to a single-lens reflex camera having a finder optical system having a roof prism, and more particularly to a flexible printed circuit board on which electric circuit components mounted in the camera are mounted. The present invention relates to a camera having an improved mechanical assembly structure that facilitates electrical connection to another rigid board (hereinafter referred to as an FPC board).

[0002]

2. Description of the Related Art Conventionally, in this kind of single-lens reflex camera,
When mounting an FPC board that is built-in and configured to mount an electric circuit component inside the camera and that constitutes an electric circuit, as a part of the side wall surface inside the camera body, for example, with a prism body that constitutes a finder optical system, The FPC board is arranged and provided along the roof surface at the top of a certain roof prism.

In addition to this, in a conventional single-lens reflex camera, an electric circuit is mounted in parallel with the outer wall surface of the mirror box portion in which the quick return mirror is arranged and also with the side surface portion of the roof prism. A rigid board is placed.

In such a conventional structure, F
In order to connect the PC board and the rigid board, a so-called solder bridge method has been used in which the exposed conductor portions are joined and connected by soldering or the like.

By the way, recent cameras are in the trend of high-density mounting due to multi-functionalization and miniaturization, and the number of connections at the connecting portions between boards as described above is increasing steadily.

For this reason, in recent cameras, so-called connectors are being adopted as connecting means at connection points between substrates, where the number of connections is enormous, which contributes to higher density and improved assembly.

In such a conventional single-lens reflex camera, a case where an FPC board and a rigid board are connector-connected in the camera body is illustrated in FIG.

That is, in FIG. 3, reference numeral 1 is a roof prism which is a prism body which constitutes a known finder optical system, and an FPC is provided above the roof surfaces 1a, 1a which are formed above the roof prism 1 and are inclined. The substrate 2 is provided so as to extend. The FPC board 2 forms an electric circuit (not shown) by mounting and arranging electric circuit components for performing various controls in the camera.

Numeral 3 is a quick return mirror which, as is well known, has a function of guiding the light from the taking lens to the finder optical system. The quick return mirror 3 is rotatably supported in a mirror box portion 4 which is a dark box by shaft portions 3a fixed to the left and right end surface portions.

A side portion 1 of the roof prism 1 is provided on a side portion of the mirror box portion 4 in parallel with an outer wall surface 4a thereof.
A rigid board 5 forming an electric circuit is also arranged in parallel with b. Further, a horizontal electric connector 6 is fixedly provided on the rigid substrate 5 at a portion close to the extension line of the roof surface 1a of the roof prism 1.

Then, one end portion 2a of the FPC board 2 is inserted into the connector 6 on the rigid board 5 for electrical connection. Note that reference numerals 7 and 8 in the figure denote electric circuit components mounted on the FPC board 2.

[0012]

However, according to the conventional structure as described above, one end 2a of the FPC board 2 is formed.
Is inserted into the connector 6, due to the physical properties of the FPC board 2,
It is inevitable that the elasticity causes the slack portion 2b. Due to the presence of the slack portion 2b, the flat surface portion 2c of the FPC board 2 provided so as to extend on the roof surfaces 2a and 2a has a small area, and the flat surface area on which the electric circuit components 7 and 8 can be mounted is limited. Will be done.

Particularly, in the above-mentioned slack portion 2b, when the electric circuit components 7 and 8 are mounted, a load is applied to the connection portions thereof, which causes problems of insulation and dropout. As a result, the slack portion 2b cannot be used, and as a result, there is a problem that high density mounting on the FPC board 2 is hindered.

Further, in such a conventional structure, due to the restoring force generated from the elastic characteristics of the slack portion 2b described above,
There is also a problem that stress is constantly applied to the connection part with the connector 6 and the reliability of electrical connection is reduced, and it is desired to take some measures to eliminate these problems.

The present invention has been made in view of the above circumstances, and is provided along the side wall surface in the camera body, for example, along the top inclined surface portion of the prism body and adjacent to the side portion thereof. The flat area of the FPC board to be connected to the horizontal electrical connection connector provided on the rigid board is secured over a wide area, enabling high-density mounting of electric circuit components, and the connection area with the connector. It is an object of the present invention to obtain a camera that adopts an inexpensive FPC board built-in structure that can also improve the reliability of the electrical connection.

[0016]

In order to meet such a demand, a camera according to the present invention is provided with a slanted surface, a slanted surface, and a curved surface, such as an outer wall surface of a built-in component and an inner wall surface of an external component, in a camera body. An FPC board which is arranged along a side wall surface by any of the above and constitutes an electric circuit, a rigid board which is arranged at a side thereof substantially orthogonally and constitutes an electric circuit, and a wall surface for disposing the FPC board of this rigid board. And a horizontal electrical connector which is provided in a portion close to the extension line of the FPC board and can be inserted from a direction parallel to the board surface of the rigid board, and at least two end portions of the FPC board on the rigid board side are provided. It is connected to the electrical connection connector in a state of being bent so as to have a substantially N-shape by the bent portion.

In the camera according to the present invention, a prism body such as a roof prism which constitutes a finder optical system, an FPC board which is arranged along a top inclined surface portion thereof and constitutes an electric circuit, and a side surface portion of the prism body are parallel to each other. And a rigid substrate that constitutes an electric circuit and is provided on a portion of the prism-side substrate surface that is close to the extension line of the top inclined surface portion and that can be inserted from a direction parallel to the substrate surface of the rigid substrate. And a connector for electrical connection of the FPC board, and one end of the FPC board on the rigid board side is bent to have a substantially N shape by two bent portions in the left and right direction of the camera. It is configured to connect.

Further, the camera according to the present invention is such that two bent portions which are bent into a substantially N-shape at one end portion of the FPC board forming the electric circuit are formed in a permanently deformed state.

[0019]

According to the present invention, the slack portion is formed on the flat surface portion of the flexible printed circuit board constituting the electric circuit arranged along the side wall surface in the camera body, for example, the top inclined surface portion of the prism body such as the roof surface of the roof prism. Since it does not occur, a wide mounting area can be secured and high-density mounting can be realized.

Further, according to the present invention, the connector connecting portion is formed by the permanent deformation of the bent portion forming the substantially N-shaped bend adjacent to the connector connecting portion on the rigid board. It is possible to improve the reliability of the electrical connection state without applying a load to the.

[0021]

1 and 2 show an embodiment of a single-lens reflex camera to which a camera according to the present invention is applied. In these figures, the same or corresponding parts as those in FIG. Is attached and detailed description is omitted.

According to the present invention, in the single-lens reflex camera having the above-described structure, the FPCs arranged along the roof surfaces 1a, 1a which are the top inclined surfaces of the roof prism 1 which is the prism body which constitutes the finder optical system. Board 2
And a rigid substrate 5 arranged in parallel to the side surface portion 1b of the roof prism 1, and a roof surface 1 on this side (on the left side in the drawing) on the roof prism 1 side substrate surface 5a of the rigid substrate 5.
a horizontal electrical connector 6 provided in a portion close to the extension line of a and insertable in a direction parallel to the board surface 5a of the rigid board 5, and one end of the FPC board 2 on the rigid board 5 side. It is characterized in that the portion 2a is configured to be connected to the electrical connection connector 6 in a state in which the portion 2a is bent to have a substantially N-shape by the two bent portions 10 and 11 in the left-right direction of the camera. There is.

More specifically, in the FPC board 2, a flat portion 12 is formed in the vicinity of the end portion 2a connected to the horizontal electrical connector 6, and the flat portion 12 is the flat surface 1a of the roof prism 1. 2 to the end portion (corner portion 1c in FIG. 2; actually, the ridge line portion where the roof surface 1a and the side surface portion 1b intersect), a sufficient flat area for mounting the electric component is secured.

On the side of the end portion 2a for connecting to the connector 6 on the extension of the flat portion 12, the above-mentioned bent portion 10,
11 is formed, and thereby a bent portion having a substantially N shape is formed. These bent portions 10 and 11 are bent on a line parallel to the direction of the arrow indicating the finder optical axis direction, and the end portion of the bent portion 10 is connected to the flat connecting end portion 2a connected to the connector 6. Has become. It goes without saying that the connection end portion 2a has a surface parallel to the insertion direction of the horizontal electrical connection connector 6 into the insertion opening (not shown).

The above-mentioned rigid substrate 5 is located in the vicinity of the side surface portion 1b of the roof prism 1, and is arranged in parallel with the optical axis direction of the finder optical system as indicated by the arrow in FIG. Further, various components that constitute an electric control circuit of the camera are mounted on the FPC board 2 and the rigid board 5 described above, but detailed illustrations thereof are omitted.

According to the above structure, the FPC board 2 constituting the electric circuit arranged along the roof surfaces 1a, 1a at the top of the roof prism 1 is bent into an N-shape by the bent portions 10, 11 described above. The flat portion 12 is secured over a wide area by the N-shaped bent portion.
The urging force that presses the FPC board 2 against a acts, and the mountability of mounting is improved.

As described above, since there is no slack in the flat surface portion 12 as in the conventional case, a wide mounting area can be secured and high-density mounting can be realized.

In particular, according to the present invention, the FPC board 2 arranged along the roof surfaces 1a and 1a of the roof prism 1 is connected to the horizontal electrical connector 6 provided on the rigid board 5 adjacent to the roof prism 1. Despite being a simple structure with an improved built-in structure for connection, F
The flat surface portion 12 of the PC board 2 is secured as an area of a wide area, which enables high-density mounting of the electric circuit components 7, 8 and the like on the flat surface portion 12.

Further, according to the present invention, due to the existence of the bent portions 10 and 11 at the substantially N-shaped bent portion of the FPC board 2, an unreasonable force acts on the connecting portion with the connector 6. Therefore, the reliability of electrical connection at the connector connecting portion can be improved.

Further, according to the present invention, in the two bent portions 10 and 11 which are bent into a substantially N-shape at one end of the FPC board constituting the electric circuit, for example, at the respective ridge lines, By adding a little bending habit,
As described above, there is an advantage that the flat area and the biasing force can be secured in the flat portion 12 more stably.

The bending tendency of the bending portions 10 and 11 as described above,
Other permanent deformations similar to these are easily obtained by taking conventionally known methods. Then, when such bending portions 10 and 11 are permanently deformed,
The stress transmitted from the flat surface portion 12 to the horizontal electrical connection connector 6 can be reduced, and the reliability of the electrical connection is further increased.

However, such permanent deformation of the bent portions 10 and 11 is not always necessary, and the point is that along the roof surface 1a of the roof prism 1, the slack portion as shown in FIG. 3 does not occur. It is sufficient that the FPC board 2 can be arranged and the plane portion 12 can be sufficiently secured.

It is needless to say that the present invention is not limited to the structure of the embodiment described above, and the shape, structure, etc. of each part of the camera can be appropriately modified or changed. For example, in the above-described embodiment, as the prism body that constitutes the finder optical system,
The case where the FPC board 2 is arranged along the inclined roof surfaces 1a, 1a at the top of the roof prism 1 (petagonal roof prism) has been described, but the present invention is not limited to this, and the well-known penta It goes without saying that the present invention can be effectively applied when the FPC board is arranged along the prism bodies forming various finder optical systems such as a prism.

Further, in the above-mentioned embodiment, the case where the FPC board 2 is arranged along the roof surface 1a of the roof prism 1 which is a prism body and the portion near the one end 2a is bent into a substantially N-shape. Although described, the present invention is not limited to this, and is provided along the side wall surface forming an inclined surface, a sloped surface, or a curved surface, which is an outer wall surface of a component part built in the camera body or an inner wall surface of a camera appearance part. Even an FPC board can be applied and exert its effect.

Further, in the above-mentioned embodiment, the FPC board 2
When forming the bent part of the with permanently deformed,
Although a method of giving a bending tendency is taken, it goes without saying that the method is not limited to this.

For example, the amount of permanent deformation applied to the bent portions 10 and 11 due to the N-shaped bending of the FPC board 2 does not need to be as large as the bent shape in the assembled state. The effect of the present invention can be exhibited even if the degree of deformation is excessive.

Further, the present invention is not limited to the single-lens reflex camera as in the above-described embodiment, but can be applied to various cameras when incorporating the FPC board, and can exert effects.

[0038]

As described above, according to the camera of the present invention, the side wall surface is formed by an inclined surface, an inclined surface, or a curved surface formed by the outer wall surface of the internal built-in component or the inner wall surface of the external component in the camera body. For example, an FPC board that is arranged along the top inclined surface of a prism body such as a roof prism that forms a finder optical system and that forms an electric circuit, and a side of the location where the FPC board is arranged is arranged in the direction in which the FPC board is arranged. Rigid boards arranged orthogonally to each other to form an electric circuit, and provided on a portion of the rigid board adjacent to the extension line of the side wall surface for disposing the FPC board, and can be inserted from a direction parallel to the board surface of the rigid board. A horizontal type electrical connector, and one end of the FPC board on the rigid board side is formed by at least two bent portions in the arrangement direction of the FPC board. In a state where the bent to exhibit a substantially N-shaped, so connected to the electrical connector, in spite of the simple and inexpensive structure, exhibits various excellent effects listed below.

That is, according to the present invention, the flat portion of the FPC board forming the electric circuit arranged along the side wall surface such as the top inclined surface portion of the prism body such as the roof prism does not have a slack portion and a wide area can be obtained. The mounting area can be secured, and high-density mounting can be realized.

In particular, according to the present invention, when connecting the FPC board arranged along the top inclined surface portion of the prism body to the horizontal type electrical connector provided on the rigid board adjacent to the prism body. Since the built-in structure has been improved, the flat part of the FPC board can be secured as an area of a wide area despite the simple structure, which allows high-density mounting of electric circuit components on this flat part. Can be made possible.

Further, according to the present invention, due to the existence of the bent portion formed by bending the FPC board in a substantially N-shape, it is possible to prevent an unreasonable force from acting on the connecting portion with the connector and to prevent the connector connecting portion from having an excessive force. Not only can the reliability of the electrical connection be improved, but due to the elastic characteristics of the FPC board, a force that urges the FPC board in the direction of making close contact with the top inclined surface of the prism body acts, so that the mounting space within the mounting space is reduced. There is no dead space generated between the prism body and the inclined surface of the top of the prism body, and the camera can be downsized.

According to the camera of the present invention, the flexible printed circuit board forming the electric circuit is permanently bent by imparting a bending habit to the two bent portions which are bent into an N-shape at one end. Since it is formed in a deformed state, no restoring force acts on the FPC board itself and no load is applied to the connector connecting portion, so that the connecting portion is disconnected, insulated, and
There is no rupture of the C substrate, no electrical disconnection between the connector and the rigid substrate, and as a result, an excellent effect that the reliability of the electrical connection state can be further enhanced is achieved.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an embodiment of a single-lens reflex camera to which a camera according to the present invention is applied and showing a partially enlarged view of the inside of the camera.

FIG. 2 is a longitudinal sectional view of a main part showing an embodiment of a single-lens reflex camera to which the camera according to the present invention is applied.

FIG. 3 is an enlarged vertical sectional view showing only an essential part of an example of a conventional single-lens reflex camera.

[Explanation of symbols]

1 roof prism as a prism body (camera body internal part) 1a roof surface (top inclined surface portion; side wall surface) 1b side surface portion 1c corner portion between roof surface and side surface portion 2 FPC board (flexible printed circuit board) 2a one end portion (connection end) Part) 2c plane part 3 quick return mirror 4 mirror box part 5 rigid board 6 electrical connection connector 7 electric circuit part 8 electric circuit part 10 bent part 11 bent part 12 flat part

Claims (6)

[Claims] 1. A flexible printed circuit board that is arranged along a side wall surface to form an electric circuit in a camera body, a rigid board that is arranged substantially orthogonal to the side wall surface side and forms an electric circuit, and the rigid board. A camera provided with a horizontal electrical connection connector which is provided in a portion close to an extension of a wall surface for disposing the flexible printed circuit board and which can be inserted from a direction parallel to the board surface of the rigid board, A camera, wherein one end of the flexible printed circuit board on the rigid board side is connected to the electrical connector in a state of being bent by at least two bent parts so as to have a substantially N-shape. . 2. The camera according to claim 1, wherein the side wall surface on which the flexible printed circuit board constituting the electric circuit is arranged is an outer wall surface of a component incorporated in the camera body or an inner wall surface of an external component of the camera body. A camera characterized by being either one. 3. The camera according to claim 1, wherein the side wall surface on which the flexible printed circuit board forming the electric circuit is arranged is any one of an inclined surface, an inclined surface and a curved surface. . 4. A prism body constituting a finder optical system, a flexible printed circuit board arranged along a top inclined surface portion of the prism body to form an electric circuit, and an electric circuit arranged parallel to a side surface portion of the prism body. A rigid substrate that constitutes a circuit, and a horizontal plate that is provided on a portion of the rigid substrate that is close to the extension line of the top inclined surface portion on the prism-side substrate surface and that can be inserted from a direction parallel to the substrate surface of the rigid substrate. In a camera provided with a connector for electrical connection of a mold, one end of the flexible printed board on the rigid board side is bent to have a substantially N-shape by two bent portions in the left-right direction of the camera. And a camera connected to the electrical connector. 5. The camera according to claim 1, claim 2, claim 3 or claim 4, wherein the flexible printed circuit board forming the electric circuit is bent at one end into a substantially N shape. The camera is characterized in that the part is formed in a permanently deformed state. 6. The camera according to claim 4 or 5, wherein a roof prism is used as a prism body forming the finder optical system, and a flexible printed circuit board is arranged along the roof surface of the top of the roof prism. Characteristic camera.