JPH023272B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for attaching terminals for external connections to a printed wiring board, and particularly to a method for attaching terminals to a printed wiring board in which a plurality of terminals and an insulating terminal block are combined and attached to the printed wiring board. It is related to.

The conventional method for attaching terminals to a printed wiring board is to insert an arbitrary number of terminals that have been integrally bonded in advance to a terminal block made of an insulating material into the mounting holes of the printed wiring board, and then insert each tip of the terminal into the mounting hole of the printed wiring board. This is done by soldering to a conductor pattern.

In this conventional method of attaching terminals to printed wiring boards, when the terminal is soldered, the terminal block that is integrated with the terminal gets heated and causes thermal deformation. The problem is that the terminal block has to be made of a material that has properties that are extremely expensive and difficult to mold.

This invention was made in order to solve the above-mentioned problems, and by providing a method for attaching terminals on a printed wiring board in which the terminal blocks are not affected by heat during soldering of the terminals, it is possible to solve the problems described above. It is an object of the present invention to enable the block to be easily formed using an inexpensive material with low heat resistance.

In order to achieve the above object, the present invention has a plurality of terminals separated from the terminal block soldered to predetermined positions on a printed wiring board, and then the terminal block is inserted into the engagement hole provided in the terminal. The engaging protrusion provided on the terminal block is plunged into engagement, and the terminal block is then attached and fixed to the soldered terminal.

According to this invention, since the terminal block is attached to the terminal after the terminal is soldered to the printed wiring board, the terminal block is not affected by any heat when the terminal is soldered. The terminal block can be made of a material with low heat resistance that is inexpensive and easy to mold. Furthermore, the terminal block can be easily and reliably attached by simply pushing and engaging the engaging protrusion provided on the terminal block into the engaging hole of the terminal.

Hereinafter, one embodiment of the present invention will be described based on the drawings.

In FIG. 1, 1 is a plurality of terminals, 2 is a printed wiring board to which these terminals 1 are soldered and fixed in a row, and 3 is a printed wiring board to which each terminal 1 is soldered after being soldered to this printed wiring board 2. This is an insulating terminal block 3 to be attached.

Therefore, the terminal 1 and the terminal block 3 are formed separately, and their illustrated configuration will be described below.

First, as shown in FIG. 2, each of the terminals 1 is integrally bent into a substantially U-shape consisting of a horizontal portion 11 and a pair of vertical portions 12 extending perpendicularly from both edges thereof.

In such a terminal 1, each vertical section 12
Forms a connecting portion 12a that is inserted into the parts insertion hole of the printed wiring board 2 using, for example, an automatic insertion machine, and this connecting portion 12a is inserted into the parts insertion hole of the printed wiring board 2
It is designed to be soldered to the conductor pattern. An engagement hole 12 is provided in the vertical portion 12.
b is formed. Further, the horizontal portion 11 is provided with a screw 1 for connecting an external connection lead wire.
An attachment hole 14 for attaching 3 is formed. Here, if the length of the vertical portion 12 excluding the connecting portion 12a, that is, the length of the portion protruding from the surface of the printed wiring board 2 is made longer than the length of the threaded portion of the screw 13, the screw 13 It is possible to attach and fix the terminal 1 to the printed wiring board 2 while the terminal 1 remains attached, and automation of this work becomes easier.

On the other hand, the terminal block 3 is attached to the terminal 1 after soldering to the printed wiring board 2 as described above, and is shown in FIGS. 3 and 4.
As shown in the figure, a pair of parallel vertical members 31,
It has a plurality of horizontal members 32 that are horizontally suspended from these vertical members 31 and are parallel to each other.

The terminal block 3 consists entirely of a one-piece molded piece of a suitable plastic material, for example polycarbonate. Here, the mutual spacing between the vertical members 31 and the mutual spacing between the horizontal members 32 are such that the space surrounded by these is the terminal 1.
The shape and dimensions are set to be approximately the same as the horizontal portion 11 of . Engagement protrusions 33 that protrude inward are provided on opposing side surfaces of each of the vertical members 31, respectively. These engaging protrusions 33
is capable of being thrust into and engaged with the engagement hole 12b of each terminal 1 in a state in which the protruding portion of each terminal 1 is accommodated in the space surrounded by each of the vertical members 31 and each horizontal member 32. ing. As shown in FIG. 4, each of the engaging protrusions 33 forms an inclined surface whose upper end stands up substantially perpendicularly to the side surface of the vertical member 31 and which gradually becomes lower toward the lower end. It is preferable that

Next, a so-called printed wiring board terminal mounting method in which the terminal 1 and the terminal block 3 are mounted on the printed wiring board 2 will be described.

First, the vertical portion 12 of the terminal 1 is inserted into the parts insertion hole at a predetermined position of the printed wiring board 2, and in this state, the connecting portion 12a of each terminal 1 is soldered to the conductor pattern of the printed wiring board 2. .

Next, the terminal block 3 is attached and fixed to the soldered terminal 1.

In this case, when the space surrounded by each vertical member 31 and each horizontal member 32 of the terminal block 3 is fitted into the protruding portion of the terminal 1 protruding from the surface of the printed wiring board 2, the terminal 1
The engaging protrusion 33 of the terminal block 3 inevitably comes into engagement with the engaging hole 12b of the terminal block 3, and by firmly connecting the two, the terminal block 3 can be easily and reliably installed and fixed. It will be done.

As described above, according to the present invention, first, a plurality of terminals separate from the terminal block are soldered to predetermined positions on the printed wiring board, and the terminal block is attached to the soldered terminals. Therefore, there is no risk that the terminal block will be affected by heat during soldering of the terminal, and for this reason, the terminal block can be formed from a material with low heat resistance that is inexpensive and easy to mold. This has the effect of reducing costs. Furthermore, the terminal block can be easily and reliably installed by causing the engaging protrusion of the terminal block to engage with the engaging hole of the terminal, and the number of terminals used can be increased to a predetermined number. Even if the number of terminals used is smaller, the terminal block can be reliably and firmly attached to the terminal by the engagement of the engagement protrusion and the engagement hole as described above, making it easy to change the number of terminals used. It also has the effect of being able to respond.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway front view showing a terminal installed according to an embodiment of the present invention, FIG. 2 is a side view of the terminal, and FIG. 3 is a partial plan view of the terminal block of the same terminal. Figure 4 is A- in Figure 3.
It is an A-line sectional view. 1...terminal, 11...horizontal part, 12...
...Vertical portion, 12a... Connection portion, 12b... Engagement hole, 13... Screw, 14... Mounting hole, 2... Printed wiring board, 3... Terminal block, 31...
... Vertical member, 32 ... Horizontal member, 33 ... Engagement protrusion.

Claims (1)

[Claims] 1. After soldering a plurality of terminals separate from a terminal block to predetermined positions on a printed wiring board, a plurality of terminals provided in the terminal block are inserted into engagement holes provided in the terminals. A method for attaching a terminal to a printed wiring board, characterized in that the terminal block is attached and fixed to the terminal after soldering by engaging the engaging protrusion in a protruding manner. 2. The terminal has a horizontal portion, a vertical portion continuous to both edges of the horizontal portion, and a screw attached to the horizontal portion, and the horizontal portion has a screw into which the screw is screwed up to its base end. 2. The method of attaching a terminal to a printed wiring board according to claim 1, wherein the terminal end thereof is held in a position where it does not come into contact with the printed wiring board.