JPH0360179A - Printed circuit board - Google Patents

Abstract

PURPOSE:To make a connector insertable into a printed circuit board from both sides of the board provided with rows of through holes by adding a through hole or a hole to the end of the through hole rows. CONSTITUTION:A through hole 4 is added to the left end of the lower row of through holes 3 of a printed circuit board(PCB) 2. Therefore, connectors provided with pins arranged in zigzag can be inserted into the PCB 2 from both sides. Moreover, The through hole 328 is connected with the through hole 4 by means of a conductor pattern 5 and no obstacle exists in the connection between the wiring pattern terminals of the PCB 2 and connector pins. Users can freely select either the surface or rear of the PCB 2 as the surface from which the connector pins are inserted in connection with such an object to be mounted as a liquid crystal display module and manufacturers can accede to various demands by manufacturing one kind of products only.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printed wiring board into which a connector is inserted.

[Conventional technology]

There are various electrical products and modules that include printed wiring boards (hereinafter referred to as PCBs), but a liquid crystal display module will be described as an example.

The liquid crystal display module consists of two thin shield cases (upper and lower), and liquid crystal display panels attached to the windows of both cases.
It mainly consists of a PCB etc. on which TAB (Tape Automated Bonding) tape, etc., which implements the motion IC of the liquid crystal display panel is mounted.

A portion of the PCB is provided with a through hole to which a plurality of pins of a connector for inputting external signals are connected. The plurality of pins of the connector are arranged in two rows in a staggered manner to make the pitch fine.

Note that a liquid crystal display device using TPT (thin film transistor) as a switching element was developed, for example, in September 1984.
It is described on page 21 of "Nikkei Electronics" published on the 10th of May.

[Problem to be solved by the invention]

The through holes provided in the PCB are naturally arranged in a staggered manner to match the arrangement of the pins of the connector.

However, in the staggered arrangement, the connectors can only be inserted into one of the front and back sides of the PCB. The user's desire to insert the connector on the opposite side of the PCB, due to other implementations, required the PCB to be redesigned.

An object of the present invention is to provide a PCB in which connectors can be inserted from both the front and back sides of the PCB.

[Means to solve the problem]

In order to solve the above problems, the present invention provides a PCB having through holes into which each pin of a connector having a plurality of pins staggered in a plurality of rows is inserted. It is characterized by the addition of holes.

[Effect]

In the present invention, through holes or holes are added to the ends of the row of through holes on the PCB, so that connectors having staggered pins can be inserted from both the front and back sides of the PCB.

〔Example〕

FIG. 1(A) is an overall plan view of a PCB for a liquid crystal display module according to an embodiment of the present invention, and FIG. 1(B) is a 1!1i
This is a partially enlarged view of iI(A), showing a planar part of a part of the PCB in which through holes are formed.

In the figure (A), 1 is a PCB, 2 is a connector insertion portion of the PCB, and 3 is a through hole into which a pin of the connector is inserted. The wiring pattern on the PCB is not shown because it is complicated.

(B) In the figure, 4 is a through hole added to the left end of the bottom row of through holes 3 (the through holes are hatched for clarity), 32 is the 28th through hole, and 5 is a through hole. 4 and through hole 32e
This is the wiring pattern that connects the The difference from the conventional technology is that through holes 4 are added at the same pitch as other through holes, and that a wiring pattern 5 is provided.

FIGS. 2(A) to 2(D) are views each showing a connector to be inserted into a PCB, and FIG. 2(A) is a top view.

(B) is a front view, (C) is a bottom view, and (D) is a side view.

6 is a connector, 7 is 28 pins staggered in two rows as shown in the figure (C), and 8 is an FPC (flexible wiring board) that sends signals from the outside.

(not shown).

3A to 3C are a plan view, a front view, and a side view of the liquid crystal display module, respectively, showing a state in which the connector is inserted into the PCB of the liquid crystal display module from the back side.

9 is a liquid crystal display module; 10 is a liquid crystal display module 9
11 is a window opened in the shield case 10, and 12 is a liquid crystal display panel attached to the window 11 of the shield case 10.

In this case, the connector 6 is inserted into the PCB 2 from the back side of the liquid crystal display module 9, and a plurality of pins 7 are exposed to the front side.

FIGS. 4A to 4C are a plan view and a front view of the liquid crystal display module, respectively, showing a state in which the connector is inserted into the PCB of the liquid crystal display module from the surface.

FIG.

In this case, the connector 6 is inserted into the PCB 2 from the front surface of the liquid crystal display module 9, and a plurality of pins 7 are exposed on the back surface.

In this embodiment, as shown in FIG. 1(B), an additional through hole 4 is provided at the left end of the lower row of through holes 3 (28 through holes corresponding to the 28 pins 7 of the connector 6) of the PCB 2. Therefore, the connector 6 having the pins 7 arranged in a staggered manner can be inserted from both the front and back sides of the PCB 2. Also, since the through holes 3□ and through holes 4 are connected by the wiring pattern 5, there is no problem in connecting the wiring pattern terminals of the PCBl and the pins 7 of the connector 6. FP to be fitted
The wiring pattern on the C side can be freely designed according to the user's convenience.

Therefore, the user can freely select the front or back insertion surface of the connector depending on the relationship with other mounted components of the liquid crystal display module, and the manufacturer can meet the above requirements of the user by manufacturing only one type of product. be able to.

The present invention has been specifically explained above based on the above embodiments, but 1
It goes without saying that the present invention is not limited to the above embodiments, and can be modified in various ways without departing from the spirit thereof.

For example, in FIG. 1(B), the through hole 32# is not connected to the wiring pattern of the PCBl (
That is, in the case of a dummy hole), the wiring pattern 5 for connecting to the through hole 4 is not necessary. Further, in the case of a dummy hole, it may be a simple hole without a conductive film provided on the side wall of the hole.

Further, in FIG. 1(B), it is also possible to provide an additional through hole 4 at the right end of the upper row. In this case, the additional through hole 4 corresponds to the first through hole.

Further, in the above embodiment, the through holes 3 and pins 7 are arranged in two rows, one above the other, but the present invention is also applicable to a case where the through holes 3 and pins 7 are arranged in three or more rows.

Furthermore, although the above embodiments have been described using a liquid crystal display module as an example, the present invention can be applied to various electrical products and modules in which connectors are mounted in a staggered arrangement.

〔Effect of the invention〕

As described above, according to the present invention, using the same PCB and the same connector, the connector can be inserted from both the front and back sides of the PCB, and the degree of freedom in mounting the connector can be increased.

[Brief explanation of drawings]

FIG. 1(A) is an overall plan view of a PCB for a liquid crystal display module according to an embodiment of the present invention, and FIG. 1(B) is a partially enlarged view of FIG. 1(A), showing the connector insertion portion of the PCB. Plane part, second
Figures (A) to (D) are a top view, front view, bottom view, side view, and Figures 3 (A) to (C) of the connector inserted into the PCB, respectively.
) are a plan view, front view, and side view of the LCD module, respectively, showing the connector inserted into the PCB of the LCD module from the back side, and Figures 4 (A) to (C) are the connectors inserted into the PCB of the LCD module, respectively. A top view, a front view, and a front view of the liquid crystal display module shown inserted from the surface.
FIG. l...PCB 2...PCB connector insertion part 3...Through hole 3□1...28th through hole 4...Additional through hole 5...Wiring pattern 6...
... Connector 7 ... Pin 8 ... FPC insertion part 9 ... Liquid crystal display module 10 ... Shield case 11 ... Liquid crystal display panel window 12 ... Liquid crystal display panel 2nd Figure 6- ---Connec 9 7------FPC Sakakiiri 3rd Figure 9--1 Sacrificial Display Panel Procedure Amendment Heisei December 228

Claims (1)

[Claims] 1. A printed wiring board having a plurality of through holes arranged corresponding to the arrangement of a plurality of pins staggered in a plurality of rows of a connector and into which the respective pins are inserted,
A printed wiring board characterized in that through holes or holes are added at the ends of the row of through holes so that pins of the connector can be inserted into the through holes from both the front and back sides of the printed wiring board.