JPH0737662A - Electric apparatus - Google Patents

Abstract

PURPOSE:To connect two objects having the different connecting surface direction to each other at low cost in a small space by using an FPC plate. CONSTITUTION:In this CD player, at least one end part is formed in an inverse L shape, and connecting terminal groups 4 and 5 arranged on the side surfaces of a light pickup part 2 and an electronic circuit part arranged in the other, are connected to each other by a flexible printed circuit board 7 whose wiring pattern is formed of a single layer. The inversed-L shaped one end part is divided almost in the same width into parts 7a and 7b, and the part 7a is bent once, and the part 7b is bent twice, and in an almost superposed condition, solder connecting land groups formed in the respective parts 7a and 7b are connected to the connecting terminal groups 4 and 5 of the optical pickup part 2 corresponding to respective ones.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric device such as a CD player using a flexible printed board.

[0002]

2. Description of the Related Art Conventionally, in an electronic device such as a CD player, a flexible printed circuit board has been used for connecting a movable part such as an optical pickup part and a fixed part such as an electronic circuit. There are height restrictions and cost restrictions, and it is desired to use the flexible printed circuit board efficiently.

Here, conventional electric equipment will be described with reference to FIGS. 3 and 4. FIG.

In a conventional electric device such as a CD player, as shown in FIG. 3, a shaft 31 is provided with an optical pickup section 32 which is movable (direction of arrow Y). An optical system 33 is provided on the plane portion of the optical pickup section 32, and a plurality of connection terminal groups 34, 35 for sending a signal from the optical system 33 to another are
They are distributed along the perimeter of the narrow side surface.

An electronic circuit portion having a connector (not shown) is mounted in the CD player. The electronic circuit and the optical pickup section 32 are connected by a flexible printed circuit board (hereinafter referred to as an FPC board) 36, and the FPC board 36 is screw 37 at a predetermined position.
It is fixed to the base material 38 by the above. This FPC board 3
The outer shape of 6 is formed into a crank shape, and a connecting portion 39 that can be inserted into the connector is provided at one end thereof.

The FPC board 36 is used for the optical pickup unit 3
Since the surface to be connected to 2 and the fixing surface of the base material 38 are orthogonal to each other, after being bent and erected at the tip 40 of the portion fixed by the screw 37, the connection terminal groups 34 and 35 are It is connected. Generally, the FPC board 36 has better durability and assembling workability than lead wires, and is therefore often used for connecting a movable portion such as the optical pickup portion 32 and a fixed portion.

By the way, since the standing portion 36a of the FPC board 36 has a large number of connection terminals of the optical pickup portion 32, if the wiring pattern is formed according to the number, the width W2 becomes very wide. This cannot be used for CD players, which have tended to be thin in recent years.

Further, the FPC board 36 is usually tape-shaped and has a narrow width, but the component cost is higher than that of the lead wire, and the cost increases further as the width W2 or the laminated structure increases. In particular, a multi-layer wiring structure capable of narrowing the width W2 is expensive and cannot be used for connection unless otherwise specified.

Therefore, as shown in FIG. 4, two FPCs each having a width W1 which is about ½ of the width W2 of the FPC board 36.
It is conceivable to use the plates 41 and 42, but in this case,
Not only does it require a large fixing space for the base material 38, but also two fixing screws 37 and corresponding connectors are required, resulting in an increase in the number of man-hours required for the mounting work, resulting in a decrease in reliability such as contact failure. It is not good to increase the number of parts, such as inviting.

[0010]

As described above, in the above-described conventional electric equipment, in the case of connecting between planes having different connection plane directions, a flexible printed circuit board having a single-layer wiring pattern is formed in consideration of component cost. Although it is best to bend and connect the wires, in this case, if the number of connection terminals is large, there is a problem in that the height of the flexible printed board increases after the flexible printed board is bent, which hinders reduction in thickness.

The present invention has been made to solve such a problem, and an object of the present invention is to provide an electric device capable of connecting, at low cost, between planes having different connection plane directions in a small space. There is.

[0012]

In order to achieve the above-mentioned object, the electric equipment of the present invention has an outer shape in which at least one end is bent at a predetermined angle, and a plurality of wiring patterns are formed along the outer shape. In an electric device in which different planes are electrically connected by a flexible printed circuit board, the one end is divided into a plurality of parts having substantially the same width along the wiring pattern, and each of the divided parts is bent so as to substantially overlap with each other. The connecting portion groups formed in the divided portions are connected to the corresponding terminal groups on the plane.

Further, this electric device has a bent outer shape having a linear portion at least at one end, and electrically connects different planes by a flexible printed board having a plurality of wiring patterns formed in a single layer along the shape. In the electric device, a slit is formed from the one end side along the wiring pattern to divide one end side of the flexible printed board into a plurality of conductor groups, and an end conductor on the other end side of the flexible printed board. Is connected to a terminal group provided on a plane, and the conductor groups on the side provided with the slits are arranged in parallel so that the linear portions on the end side overlap each other, and in this state, the end conductors of each conductor group are Is connected to another terminal group provided on the plane.

[0014]

According to the present invention, one end of a single-layer flexible printed circuit board bent at a predetermined angle is divided into a plurality of parts each having substantially the same width, and the respective divided parts are bent and substantially overlapped, and then the connection formed in each divided part. The groups are connected to the corresponding terminals on the plane.

As a result, it is possible to realize electrical connection of planes in different directions at a height that is almost half that of the prior art and at low cost.

[0016]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a diagram showing a configuration of a main part of a CD player as an electric device of an embodiment according to the present invention, and FIG. 2 is shown in FIG.
It is a figure which shows the flexible printed circuit board used for this CD player.

In the figure, 1 is the shaft of this CD player. Both ends of the shaft 1 are fixed to a chassis (not shown). An optical pickup unit 2 is provided on the shaft 1 so as to be movable in the arrow Y direction (radial direction of the optical disc). An objective lens 3 is provided on the upper surface of the optical pickup unit 2, and a laser diode, a light receiving element, an optical lens, an actuator for moving the objective lens 3 and the like are built in the interior of the objective lens 3. A plurality of connection terminal groups 4 and 5 for signal input / output are provided on the side surface of the optical pickup section 2. The total number of terminals of the connection terminal groups 4 and 5 is 11, for example. Here, the signal is an optical signal sent from the light receiving element, a control signal input from another, or the like. Since these connecting terminal groups 4 and 5 have thin side surfaces of the optical pickup section 2, the connecting terminal groups 4 and 5 are arranged in two planes along the periphery thereof.

On the other hand, a base material 6 and another substrate (not shown) at a position different from the base material 6 are fixed to the bottom of the CD player. An electronic circuit section for controlling the optical pickup section 2 and a connector are mounted on another board. A flexible printed circuit board (hereinafter referred to as an FPC board) 7 is fixed to the base material 6 with screws 9 at the fixing holes 8. The electronic circuit section and the optical pickup section 2 are connected via the FPC board 7 and the connector.

As shown in FIG. 2, the FPC board 7 has a plurality of, for example, 11 pieces, etc., on a base film of an organic insulating material, such as a polyamide film, which is formed to have a crank-like outer shape. A metal pattern (wiring pattern) is formed in parallel, and an insulating process is performed on it. At one end of the FPC board 7, connecting portions 10 to be inserted into the connector are provided at a predetermined pitch. At the other end, solder connection land groups 11 and 1 respectively corresponding to the plurality of connection terminal groups 4 and 5 of the optical pickup unit 2 are provided.
2 is formed.

On the FPC board 7, the widths W1 of the solder connection land groups 11 and 12 are made substantially the same from the side where the solder connection land groups 11 and 12 are formed to the portion where the screws are fixed (to the position of the shaded portion). The wiring pattern is divided into a fourth line and a fifth line and slits are provided, and the FPC board 7 is divided into two portions 7a and 7b along the wiring pattern. As a result, four wiring patterns are provided on the part 7a and on the part 7b.
7 wiring patterns are divided. Each part 7
Looking at a and 7b from the solder connection land group 11 and 12 side to the portion where the screws are fixed (to the position of the shaded portion), they are bent at right angles from the middle of the straight line portion and become substantially inverted L-shaped. I understand.

In the case of this CD player, since the side surface of the optical pickup portion 2 and the fixing surface of the base material 6 are substantially orthogonal to each other, the FPC board 7 has one portion 7a at the first position (dotted line portion). It is bent at A) and stands substantially vertically, and then the solder connection lands 11 are soldered to the connection terminal group 4 for connection.

On the other hand, the other portion 7b of the FPC board 7 is the first
At a second position (dotted line portion B) apart from the position (dotted line portion A) by a predetermined distance so as to almost overlap itself, and then at the third position (dotted line portion C). The solder connection lands 12 are soldered and connected to the connection terminal group 5 after being bent in the opposite direction and standing substantially vertically and arranged in parallel so as to substantially overlap one portion 7a.

As described above, according to the electric equipment of this embodiment,
In a state where the side surface of the optical pickup section 2 and the fixing surface of the base material 6 are substantially orthogonal to each other, the low-cost FPC plate 7 having a single-layer wiring is formed into a substantially crank shape, and the solder connecting land group 1 is formed.
A slit is provided from one end side where 1 and 12 are formed, and it is divided into two portions 7a and 7b so that each width W1 is almost the same, and the portion 7a is bent once and the portion 7b is bent twice to be substantially vertical. Since they are placed on top of each other and are almost overlapped with each other, and are connected to the corresponding connection terminal groups 4 and 5 of the optical pickup unit 2, the height can be reduced to about half that of the conventional optical pickup unit. 2 and other electric circuit parts can be connected at low cost.

In the above embodiment, the FPC board 7 having an inverted L-shape at one end is used. However, if the flexible printed circuit board is divided into a plurality of parts, and the bent parts are substantially overlapped with each other, the outer shape is obtained. May have a slope and the invention is not so limited.

[0026]

As described above, according to the electric device of the present invention, the bent one end of the flexible printed circuit board is divided into a plurality of parts having substantially the same width, and the respective divided parts are bent and substantially overlapped before connection. Therefore, the height of the portion where the flexible printed circuit boards are overlapped is almost halved as compared with the conventional one, and it becomes possible to realize electrical connection of planes in different directions at low cost.

[Brief description of drawings]

FIG. 1 is a perspective view showing a main configuration of a CD player according to an embodiment of the present invention.

FIG. 2 is a plan view showing an FPC board used in the CD player of FIG.

FIG. 3 is a perspective view showing an FPC board used in a conventional CD player.

FIG. 4 is a perspective view of a conventional CD player using two FPC boards.

[Explanation of symbols]

1 ... Shaft, 2 ... Optical pickup part, 3 ... Objective lens, 4, 5 ... Connection terminal group, 6 ... Base material, 7 ... FPC board, 8
... fixing holes, 9 ... screws, 10 ... connecting parts, 11, 12 ...
Land group for solder connection.

Claims (2)

[Claims] 1. An electric device in which at least one end portion has an outer shape bent at a predetermined angle and a plurality of wiring patterns are formed along the shape to electrically connect different planes to each other. One end is divided into a plurality of parts having substantially the same width along the wiring pattern, and the divided parts are bent so as to substantially overlap each other.
An electric device comprising a group of connecting portions formed on each of the divided portions and a corresponding group of terminals on the plane corresponding to the connecting portion group. 2. An electrical system in which at least one end has a bent outer shape having a linear portion, and a plurality of wiring patterns are electrically connected to different planes by a flexible printed board formed in a single layer along the shape. In the device, a slit is formed from the one end side along the wiring pattern to divide one end side of the flexible printed board into a plurality of conductor groups, and the end conductor on the other end side of the flexible printed board is made flat. Connected to the provided terminal group, the respective conductor groups on the side provided with the slits are arranged in parallel so that the straight portions on the end side overlap each other, and in this state, the end conductors of each conductor group are placed on another plane. An electric device characterized by being connected to another terminal group provided.