JPS62109391A - Printed wiring circuit device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] ($1! Required) In a printed wiring board circuit device in which components are mounted on a printed wiring board, there is a circuit between the printed wiring board and the component, which connects to the terminal of the component and connects to the outside of the component. By interposing a flexible printed wiring board with lead-out wiring, jumper wires can be easily connected on the component mounting side.
Moreover, the mounting density of components is not reduced.

[Industrial application field]

The present invention relates to a wiring configuration of a printed wiring board circuit device in which components are mounted on a printed wiring board.

The printed wiring board circuit device described above is widely used in various devices using electronic circuits.

If the circuit is complex, wiring changes may be required after manufacturing. If it is difficult to change the wiring pattern of the printed wiring board, for example because it is in the prototype stage or the production quantity is small, connect jumper wires (jump conduction wires) on the printed wiring board. Generally, it is handled by

This jumper wire connection is easy to perform, and it is usually desirable to connect the jumper wires on the component mounting surface side.

[Prior art and problems to be solved by the invention] Fig. 3 is a side sectional view showing the main parts of the first conventional example, which is a general printed wiring board circuit device, and Fig. 4 shows the mounted components. A perspective view of an example (al (bl).

In Fig. 3, 1 is a printed wiring board, A and B are parts mounted on the wiring board 1, and 2 is a fixed connection by soldering by volatilizing terminals Ta or Tb of parts A or B provided on the wiring board 1. Reference numeral 3 denotes a through-hole-shaped component hole 3 that is provided in the wiring board 1 and is a through-hole-shaped pie hole that connects the wirings in the wiring board 1.

As shown in FIG. 4(a), component A is a component in which a terminal Ta is implanted on the bottom surface, and is used, for example, in a pin grid array type package LSI or a similar hybrid IC1IC.
This corresponds to a socket, etc., and when mounted on the wiring board 1, the terminal Ta is located inside the mounting area.

Component B is a component in which the terminal Tb is led out from the side, as shown in FIG. 4(1)), and is, for example, a molded IC,
This applies to resistors, capacitors, etc. whose lead wires are led out in both directions, and when mounted on the wiring board 1, the terminal Tb is located outside the mounting area of the main body.

When connecting a jumper wire between components A and B in a printed wiring board circuit device having such a configuration, it is difficult to connect the component A side on the component mounting surface side (example of the surface). As shown in FIG. 3, the jumper wire J1 will be connected to the component A on the back side through the pipe hole 3 near the component.

This is quite a difficult task and requires a large amount of man-hours. Moreover, the jumper 11 J 1 turned to the back side may get caught and break when it is attached to or detached from an automatic testing machine.

FIG. 5 is a side sectional view of a second conventional example in which the above problem can be avoided (jumper wires can be connected on the front side).

This figure corresponds to FIG. 3, and the printed wiring board 1a used in the printed wiring board circuit device shown in the same figure has a through-hole-shaped extraction hole 4 outside the mounting area of the component A. be. The draw-out holes 4 are provided corresponding to the respective component holes 2 for fixed connection of the terminals Ta to the component, as indicated by broken line arrows, and are connected to the respective corresponding component holes 2 within the wiring board 1a.

With this configuration, when connecting a jumper wire between parts A and B, the jumper wire J to be connected
2 is connected to the drawer hole 4 on the front side so that there is no need to turn it to the back side, which facilitates the connection work and eliminates the risk of disconnection.

However, this configuration has a problem in that since the pull-out hole 4 is provided, the area occupied by the components becomes large, and the mounting density of the components decreases. Furthermore, in the wiring board la, the wiring connecting the lead-out hole 4 and the component hole 2 may make it difficult to draw other wiring patterns.

[Means for solving problems]

FIG. 1 is a side sectional view showing essential parts of an embodiment of the present invention.

The above problem is as shown in FIG. A second printed wiring board 1 having flexibility and having wiring led out to the outside of the area
This problem is solved by the printed wiring board circuit device of the present invention, which includes the following.

According to the present invention, the component A is preferably one in which the terminals are arranged inside the mounting area, as explained in FIG. 4 (al).

[Effect]

When connecting a jumper wire to component A, the jumper wire is connected to the wiring on the second printed wiring board 11.
Unlike the first conventional example shown in FIG. 3, it is no longer necessary to route the wire to the back side of the printed wiring board 1, making the connection work easier and eliminating the risk of wire breakage.

Moreover, the drawer hole 4 as shown in the second conventional example shown in FIG.
Since there is no need to provide a , there is no need to reduce the mounting density of components.

〔Example〕

Examples will be described below with reference to FIG. 1 and a plan view of FIG. 2 showing a second example of a printed wiring board used in the examples.

FIG. 1 is a diagram corresponding to FIG. 3, and the first printed wiring board 1 used in the printed wiring board circuit device shown in FIG. 1 is the printed wiring board 1 used in the first conventional example shown in FIG. 3. 1, and the mounted parts A and B are also the same.

Second printed wiring board 1 interposed between wiring board 1 and component A
1 is generally a flexible printed circuit (Flexib
It is a flexible printed circuit board known as a printed circuit board, and is constructed as shown in FIG. 2, for example.

The terminals 12, which are the inner ends of the wiring 15 of the wiring board 11, have through holes and are arranged so that the terminals Ta to the components can be passed through and connected by soldering. That is, this arrangement matches the arrangement of component holes 2 of wiring board 1 to which terminals Ta are fixedly connected.

Further, the terminals 14, which are the outer ends of the wiring 15, are appropriately arranged outside the mounting area of the component A (the area indicated by the broken line), and have through holes so that the jumper wire can be soldered and connected.

The wiring board 11 is mounted when the component A is mounted on the wiring board 1, and the terminal 12 is connected at the same time as the terminal Ta is fixedly connected to the component hole 2 by soldering. At this time, the wiring board 11 does not adversely affect adjacent components by bending its peripheral portion upward.

When connecting a jumper wire between parts A and B, the jumper wire J3 to be connected is connected to the wiring board 11 in the same way as the connection to the drawer hole 4 of the second conventional example shown in FIG.
It is only necessary to connect it to the terminal 14 of.

Therefore, the printed wiring board circuit device having this configuration can connect jumper wires only on the surface side of the wiring board 1 as in the second conventional example, and has the same component mounting density as the first conventional example. It can be secured.

Note that when the printed wiring board circuit device is in the prototype stage, the second printed wiring board 11 is attached to all parts A for which it is difficult to connect jumper wires on the front side, and when it becomes necessary to connect jumper wires, Once the connections are made using the relevant wiring board 11 and all the necessary jumper wires have been determined, it is desirable to change the wiring pattern of the wiring board 1 to make the wiring board 11 unnecessary.

However, if it is difficult to change the pattern because the production quantity of the device is small, or if a jumper wire is required due to the wiring pattern, the wiring board All you have to do is install the .

〔Effect of the invention〕

As explained above, according to the configuration of the present invention, in a printed wiring board circuit device in which components are mounted on a printed wiring board,
Jumper wires can be easily connected on the component mounting side.
Moreover, this has the effect of preventing the mounting density of components from decreasing.

[Brief explanation of drawings]

Fig. 1 is a side sectional view of an embodiment of the present invention without showing the main parts, Fig. 2 is a plan view of a second printed wiring board example used in the embodiment, and Fig. 3 is a plan view of the first conventional example. FIG. 4 is a perspective view (a) Tbl of an example of mounted parts, and FIG. 5 is a side sectional view showing the main parts of a second conventional example. In the figure, 1 is a printed wiring board (first printed wiring board), 1a is a printed wiring board, 2 is a component hole, 3 is a wire hole, 4 is a drawer hole, 11 is a second printed wiring board, 12.14 is the terminal of 15, 15 is the wiring of 11, AlB is the component, Ta is the terminal of A, Tb is the terminal of B, J1 to J3 are jumper wires, Su4waribγ'face'?ri Figure 3 'yf &Bin':!R517'k'91'44'
fLVJJ (0 -

Claims (1)

[Claims] 1) a first printed wiring board (1) and a first printed wiring board (1);
) mounted on the component (A), the second printing is flexible and has wiring connected to the terminal of the component (A) and led out to the outside of the mounting area of the component (A). Wiring board (11)
1. A printed wiring board circuit device characterized by comprising: 2) The printed wiring board circuit device according to claim 1, wherein the component (A) has a terminal arranged inside the mounting area.