JPS62141524A - Package structure of flexible printed board on camera - Google Patents

Abstract

PURPOSE:To make a mutual circuit connections among plural divided flexes by one connector part by providing divided bodies with protruding extension piece parts which are flexible toward a common camera body surface part. CONSTITUTION:The 1st - the 3rd divided flexes 1-3 are provided with the protruding extension piece parts 1c-3c which are flexible toward a surface part nearby a lens mount part in front of a camera body. The protruding extension piece parts 1c-3c of the 1st - the 3rd divided flexes 1-3 mounted on the corresponding surface part of the camera body are bent toward the front surface part of the camera body and circuit terminals of terminal parts of 1c-3c are connected and fixed at one position on the camera body front surface part by a proper means, thereby connecting the circuits of the 1st - the 3rd flexes 1-3 together on the whole.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a mounting structure of a flexible printed circuit board for a camera.

[Conventional technology]

Conventionally, in cameras, especially eye-reflex cameras, electrical circuit wiring has been mounted on flexible printed circuit boards (hereinafter abbreviated as flexible) in order to effectively utilize the narrow space inside the camera.
was placed on the top surface of the camera body base plate (aluminum die-cast body, etc., hereinafter referred to as the camera body).

However, as cameras in recent years have become highly electronic and multi-functional, the scale of circuit implementation has become larger, and various switches and
As sensors and other devices have become distributed throughout the camera, flexible wiring for wiring mounting is no longer sufficient to cover only the top surface of the camera body; It is spreading.

(Problem to be Solved by the Invention) In this case, a large deployable flexible board with a series of flexible parts mounted on the top side of the camera body, etc., is mounted on the top side of the camera body.・Inserting the parts while bending them to the bottom and sides was inefficient and placed major constraints on the process and costs.

Therefore, we configured the flexible cable as multiple split pieces for each flexible mounting surface such as the top, bottom, and side surfaces of the camera body, assembled them onto the corresponding surfaces of the camera body, and interconnected each split flexible cable to form a whole. A method of connecting a series of wires is often adopted.

Figure 7 shows an example of this, in which the flexible cable is divided into: (1) a first split flexible cable placed on the top surface of the camera body (not shown) across the pentagonal prism part, and (2) a second split flexible cable placed on the bottom surface of the camera body (not shown). With Flexi 2.

■With the third split flexible cable 3 placed on the same side.

It is constructed as a three-piece divided body, and each of these divided flexible plates
・Attach parts 2 and 3 to the corresponding surfaces of the camera body, and
The circuit terminal parts la and 3a of the split flexible boards 1 and 3 are connected to each other on the top side of the camera body, and the circuit terminal parts 2a and 3b of the second and third split flexible boards 2 and 3 are connected to each other on the bottom side of the camera body. The circuits of the first to third divided flexible cables 1-2-3 are connected in series.

However, in this method, the number of connection processing points between the divided flexible boards is two, 1a*3a, 2a*3b, or more, as in the above example, and an independent connection structure is required for each. Whether the connection is made by soldering or by using a rubber connector, a positioning and fixing structure for the split flexible terminals to be connected to each other is formed at the two connection points 1a/3a, 2a/3b, or more. workability/
Problems remain in terms of cost, etc. In addition, in the case of the above example, a part of the circuit on the first split flexible board 1 side and a part of the circuit on the first split flexible board 2 are attached to the third split flexible board 3 disposed on the side surface of the camera body.
It is also necessary to form and provide a relay wiring pattern that directly connects a part of the circuit on the side, which reduces the packaging density of the circuit that should originally be provided in the third divided 7-layer 3. It will also be a result.

The present invention similarly configures the flexible cable as a plurality of divided pieces for each surface such as the top, bottom, and side surfaces of the camera body, and mounts them on the camera, but all of the above-mentioned problems can be solved. Reasonable and flexible pudding for the camera that has been resolved! The purpose is to provide a board mounting structure.

1. Structure of the Invention [Means for Solving Problems] The present invention provides a flexible printed circuit board to be mounted on the surface of the camera body into a plurality of divided pieces for each mounting surface portion such as the top surface, bottom surface, and side surface of the camera body. , and each of the above-mentioned flexible prints is configured such that the six-divided body is provided with an overhanging extension piece that can be bent toward a common camera body surface where the six-divided body is not mounted, and is mounted on the corresponding surface of the camera body. Each of the protruding extension pieces of the divided board is bent toward the common camera body surface, and the circuit terminals provided on each of the protruding extension pieces are connected to the camera by 1 k-pu Llψ. The circuits of the divided printed circuit boards of Tatami-Muru 1jiL Shiku 11-Nanaichi Noihiko 11 were connected in a series as a whole. The gist of this paper is a mounting structure of a flexible printed circuit board for a camera, which is characterized by the following.

[For production]

By doing the above, the connection between the plurality of split flexible boards mounted on multiple surfaces such as the upper and lower middle surfaces of the camera body can be made using the minimum overhanging extension piece provided in each of the 7 split boards. This can be done using the one connection space and member on the surface of the camera body with a minimum number of bends, and it is possible to improve workability and reduce costs for mounting the flexible cable on the camera. In addition, the circuit connection between each split flexible cable is made directly through the phase 1L connection circuit terminal fl& (connection part) of the protruding extension piece of each split flexible cable that is concentrated at the above-mentioned one place on the surface of the camera body. , there is no need to include a relay wiring pattern as described in the prior art in any of the divided flexible boards, and the circuit packaging density of the extra divided flexible boards can be increased accordingly.

〔Example〕

FIG. 1 is a layout diagram of an example of a flexible mounting structure for a camera according to the present invention.

1 is a first split flexible cable disposed on the top surface of the camera body across the pentaprism part, 2 is a second split flexible cable disposed on the bottom surface of the same, and 3 is disposed on the same side surface. Third
It is a split flexible cable. The base material of the flexible cable is an insulating film (or sheet) such as polyimide, and the required conductive pattern circuit (copper pattern) is formed on the front, back, or both sides, and the required electrical circuit parts are attached. However, they are omitted from the figure.

Furthermore, each of the first to third split flexible cables 1, 2, and 3 has projecting extension pieces 1c, 2Cφ3 that are bent toward the surface near the side of the lens mount on the front of the camera body, respectively.
It is equipped with c.

Each of the above-mentioned first to third split flexible cables L, 2, and 3 is mounted on the corresponding surface of the camera body.
2c and 3c are bent toward the front of the camera body, and the circuit terminals of the terminals of 1c, 2C, and 3C are connected to each other at one place on the front of the camera body using appropriate means.
It is fixed and the circuits of the first to third divided flexible cables 1, 2, and 3 are connected in series.

Figures 2 to 4 show each of the above split flexible projecting extension pieces 1c.
This figure shows an example of a structure (connection part) for connecting and fixing the terminal parts of 2c and 3c on the front surface of the camera body.

In Fig. 2, 4 is the camera body, 5 and 5 are a pair of positioning pins installed vertically at predetermined positions on the front surface of the camera body, and 6 and 6 are located at the outer positions 2 of the pair of upper and lower positioning pins 5 and 5. A pair of dowels with screw holes are provided, 7 is a metal fitting for holding down a rigid cylinder such as an iron plate, 8 and 8 are set screws for the metal fittings, and 9 and 1O are two rubber connectors, first and second.

The above-mentioned pair of positioning pins 5 are attached to each of the protruding extension pieces 1c, 2c, and 3c of each of the first to third split flexible cables 1 and 2 fists 3, and the above-mentioned first and second rubber connectors 9 and 1O1 presser fittings 7, respectively. - A small positioning hole a is formed to fit corresponding to 5.

ld@le (FIG. 3) is a group of conductive pattern terminals provided on both sides of the terminal portion of the first divided flexible projecting extension piece 1c, on the front side and the back side, respectively.

2d is a group of conductive pattern terminals provided on the back side of the end portion of the second split flexible overhang extension piece 2c, and a conductive pattern terminal group provided on the front side of the end portion of the first split flexible overhang extension piece 1C. It has a corresponding relationship with the electron group 1d.

3d is a group of conductive pattern terminals provided on the front side of the end portion of the third split flexible overhang extension piece 3c, and a conductive pattern terminal group provided on the back side of the end portion of the first split flexible overhang extension piece 1C. It has a corresponding relationship with the terminal group 1e.

The rubber connector 9 (10) has elasticity in the thickness direction.

When a pressing force is applied in the thickness direction, the member has conductivity only in the thickness direction and maintains insulation in other directions, as shown in Figure 4 (a).
) is a type constructed by embedding conductive fibers M9b such as metal wires or carbon wires in the thickness direction of an elastic insulator base 9a made of silicone rubber 7, and (b) in the same figure is a type composed of an elastic insulator base 9a such as silicone rubber. A portion of the paste 9a and a conductive layer 9b containing carbon.
1 shows an enlarged perspective view of a portion of a type constructed of alternating sections; FIG.

First, the terminal portion of the third split flexible projecting extension piece 3c is formed in the pair of upper and lower positioning pins 5, 5 on the front surface of the camera body, and a small positioning hole aea is formed therein.
The first
Rubber connector 9 → first split flexible projecting extension piece 1c
terminal part → second rubber connector lO → terminal part of second split flexible overhanging extension piece 2c → presser metal fittings 7 are formed thereon, and positioning small holes a and a are inserted into the above-mentioned positioning pins 5 and 5.
Fit the above member 3cm9・ice to
・Place the entire parts 2c and 7 together to position and lock them.

Next, insert the screws 8@8 into the upper and lower screw insertion holes 7a, 7a of the presser metal fitting 7, respectively, and screw them into the screw holes of the screw hole dowels 6, 6 on the front side of the camera body to attach the presser metal fitting 7 to the front side of the camera body. By sufficiently tightening the overlapping members 3C, 9, and 9 between the presser fitting 7 and the front part of the camera body,
1cm 1O*2C are held pressed together.

In the case of this example, the protruding height dimension α (Fig. 3) of the dowels 6 and 6 with screw holes is set to be more appropriate than the overall thickness dimension of the overlapping members 3C, 9, IC, 1O, and 2c in an uncompressed state. By sufficiently screwing in the screws 8 and 8 until the back side of the presser metal fitting is secured to the protruding end surface of the dowels with screw holes 6 and 6, the overlapping member 3C and 9 fists 1cφ are set.
1O-2C is held between the presser metal fitting 7 and the front part of the camera body in a mutually sufficiently suppressed state.

FIG. 3 shows an enlarged longitudinal cross-sectional view of the above-mentioned connecting portion with the screws 8 and 8 fully screwed in. However, for convenience, the thickness of the conductive pattern terminal groups 1deleφ2d and 3d is greatly exaggerated.

In this state, the third split flexible projecting extension piece 3
The conductive pattern terminal group 3d, which is provided on the front side of the terminal part of C, and the conductive pattern terminal group 1e, which is provided on the back side of the terminal part of the first split flexible projecting extension piece IC, are the first rubber. They are aligned through the connector 9, and also based on the compressed state of the first rubber connector 9 (by making conductivity only in the thickness direction, the individual corresponding terminals of the conductive pattern terminal group 3C and the conductive pattern terminal group 1e) They become electrically connected to each other. Similarly, a group of conductive pattern terminals 2d is provided on the back side of the terminal end of the second split flexible extending extension piece 2c.
The conductive pattern terminal group 1d, which is provided on the surface side of the terminal portion of the first divided flexible projecting extension piece IC, is the second
The second rubber connector 10 which is aligned and corresponds to each other through the rubber connector 10, and the respective corresponding terminals of both terminal groups 2d-1d become conductive in the thickness direction under pressure and G, becomes conductive.

That is, the electric circuits of the first to third divided flexible boards 1-2-3 are connected directly to each other in series at the one connection portion.

The first and second rubber connectors 9 and 10 are omitted, and the fifth
As shown in the figure, a group of conductive pattern terminals 1d on the third split flexible cable 3 side, a same terminal group 1e on the first split flexible cable 1 side, and a second
Press the conductive pattern terminal group 2d on the split flexible board 2 side and the same terminal group 1d on the first split flexible board J+1 side directly with a presser metal fitting 7 with an elastic pressing material 7b such as silicone rubber or sponge interposed on the back side. Alternatively, the contact may be brought into a conductive state.

Note that the positioning pins 5 on the camera body side of each of the protruding extension pieces 1c*2c and 3c of the first to third split flexible cables 1, 2, and 3
・The fitting/locking stacking order for 5 is 3c→l in the above example.
The order of stacking is not limited to c→2c, but may be designed and set in an appropriate stacking order depending on the process and the destination of the connected wiring.

FIG. 6 is a layout diagram of the other side of the flexible mounting structure.

In this example, the first split flexible cable 1 is arranged on the upper surface of the camera body across the pentagonal prism part, the second split flexible cable 2 is arranged on the lower surface of the camera body, and the lens mount is mounted on the front surface of the camera body. The third portion is placed on the surface near the side of the part.
1,1 flexible key, and the above first to third divided flexible key 2.3'Lψノ+41shi:1-)1/F%ln
MrGtrjlrer! -t--v・flea-mu number Ctl+
ll+r-1+-projection extension piece IC・2C・3
C is provided, and the three protruding extension pieces 1c, 2C, and 3'c are folded toward the side surface of the camera body, respectively, and the parts shown in the example in Figures 1 and 2 or the example in Figure 3 are bent. The connection structure similar to the one shown in FIG. In this example, the maps are overlapped in the order of 2c+IC→3C.

C. Effects of the Invention As described above, according to the present invention, a plurality of sheets (three sheets in the example)
The circuit 118 connection between the split flexible cables can be made at only one connector part, which improves workability and saves mounting space.

Furthermore, the overhanging extension pieces from a plurality of divided flexible sheets only need to be bent at least once from each flexible sheet, and only a limited amount of extension is required, which makes it advantageous to take out materials for the flexible sheet, leading to cost reductions.

Furthermore, as in the prior art example (FIG. 7), the wiring spanning the first divided flexible sheet and the second divided flexible sheet 2 makes the third divided flexible sheet 3 have a width a5. Since there is no need for wiring, unnecessary wiring becomes unnecessary, which is advantageous both in terms of efficiency and in terms of high-density circuit packaging.

[Brief explanation of drawings]

FIG. 1 is a layout diagram of an example of a mounting structure of a plurality of split flexible boards for a camera according to the present invention, FIG. 2 is an exploded perspective view of a connecting portion, FIG. Figures a) and (b) are structural model diagrams of rubber connectors, Figure 5 is an enlarged vertical sectional view of another connection configuration, Figure 6 is a layout diagram of another split flexible mounting structure, and Figure 7 is a conventional one. FIG. 2 is a layout diagram of an example of a split flexible mounting structure. 1, 2, and 3 are the first, second, and third split flexible cables. LC fists 2c and 3C are projecting extension pieces provided on each split flexible cable, 4 is the camera body, 5 and 5 are positioning pins, and 7
is the presser metal fitting, 9 and 10 are the first and second rubber connectors, l
d, 1e, 2d, and 3d are conductive pattern terminal groups. Figure 1 Figure 6 Figure 7 Jo z (a) (b)

Claims (1)

[Claims] (1) The flexible printed circuit board to be mounted on the surface of the camera body is divided into multiple pieces for each mounting surface such as the top, bottom, and side surfaces of the camera body, and each divided body has a common board on which each divided body is not mounted. The structure includes projecting extension pieces that can be bent toward the camera body surface, and each projecting extension piece of each flexible printed circuit board segment mounted on the corresponding surface of the camera body is attached to the common camera body surface. The circuit terminals provided on each of the protruding extension pieces by bending them toward each other are connected to each other on the surface of the camera body, so that the circuits of each of the flexible printed circuit board segments are connected in a series as a whole. A mounting structure of a flexible printed circuit board for a camera characterized by: