JPH05290908A - Structure for connecting terminal board to printed circuit board - Google Patents

Abstract

PURPOSE:To facilitate the working process by pinching to hold a printed pattern, which is provided in the edge of a printed board, with pinching pieces provided in a terminal board, and inserting one end of a terminal extended from the terminal board into a through hole for connection, and thereafter, solder-connecting the one end of the terminal with electronic parts loaded on the board with the re-flowing. CONSTITUTION:In the case where a terminal board 13 is fitted to the edge of a printed board 10, the board 10 is inclined, and the edge of the board is inserted a little into the open side of pinching pieces 17, and the board 10 is turned in the arrow direction around of the board edge, which abuts on the pinching pieces 17. After keeping the board in the horizontal posture, the board is pushed in the arrow direction more so that the board edge is tightly fitted inside of the pinching pieces 17. The board can be moved in the arrow direction by the length of a through hole. Under this condition, a circuit pattern and a through hole on the printed board are automatically coated with cream solder, and thereafter, parts 18 are mounted on the printed board, and finally, the cream solder is fused by the re-flowing to be solidified. Electrical and mechanical connection is thereby secured.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a connecting structure between a printed board and a terminal board.

[0002]

2. Description of the Related Art In order to electrically connect a printed circuit board having various circuits and electronic parts to the outside, a terminal board is fixed to the printed circuit board, and the printed circuit board is provided with terminals extending through the terminal board. A circuit unit in which the above circuit patterns and through holes are connected to the outside is often used. As such a circuit unit, for example, a memory IC
A module, a high frequency circuit unit, an audio circuit amplifier unit, a frequency oscillator unit, or the like may be exemplified as a unit that constitutes a specific functional block.

In a conventional circuit unit, when a terminal board is connected to a printed board, the surface of the terminal board 2 is orthogonal to one end edge of the printed board 1 as shown in FIGS. 3 (a) and 3 (b). The L-shaped metal fittings 3 are screwed and fixed in a state of being brought into contact with each other, and then the terminals 5 penetrating the hermetic portion 4 of the terminal board 2 and the through holes 6 on the substrate are connected to the lead wires 7.
Was connected by.

In this conventional connection structure, the terminal board 2
Since it is difficult to automate the work of fixing the lead wire 7 to the wire and the work of inserting the lead wire 7 into the through hole 6 and then fixing the lead wire 7 by soldering or the like, all of the work is performed manually. For this reason, there is a limit to the improvement of productivity under the current conditions, and it has been impossible to reduce the cost.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and is a simple assembly without using L metal fittings, screws, etc. in a circuit unit fixed in a state where the terminal board surface intersects the edge of the printed board. It is an object of the present invention to provide a connection structure of a terminal board to a printed circuit board, which can be assembled only by a mounting operation and soldering.

[0006]

SUMMARY OF THE INVENTION To achieve the above object, the present invention fixes a front surface of a terminal board in a state of abutting it so as to intersect an edge of a printed circuit board on which a circuit pattern is formed, and penetrates the terminal board. In a circuit unit formed by electrically connecting a front end portion of a terminal to a through hole on the printed board, the through hole on the printed board is an elongated hole formed along the edge, A printed pattern is formed on the terminal board, and a bifurcated clamping piece for clamping and holding the substrate edge including the printed pattern is provided on the front surface of the terminal board, and the front end portion of the terminal projected from the terminal board is It is bent so that it can be inserted into the through hole of the printed circuit board, and further, the connection between the front end portion of the terminal and the through hole is performed by reflow. To have.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. FIG. 1 is a perspective view showing a configuration of a printed circuit board and a terminal board according to an embodiment of the present invention, and FIGS.
And (c) are diagrams showing an assembling procedure, in which a plurality of long hole-shaped through holes 11 are arranged along one edge of the printed circuit board 10 on which a circuit pattern is formed (not shown). Multiple print patterns 1 in appropriate places
Form 2. The terminal plate 13 includes a metal plate 14, a terminal 16 penetrating the metal plate 14 via an insulating material 15 such as a hermetic material, and a bifurcated clamping piece 17 for clamping and holding the board edge including the print pattern 12 on the printed board. Have and.

The through hole 11 is a long hole-shaped through hole extending in a direction orthogonal to the board edge connecting the front surface of the terminal plate 13, and is for receiving the lower end portion (front end portion) of the terminal 16 as described later. It is a hole. The print pattern 12 is
Although it is formed only on one surface of the printed circuit board 10 in FIG. 1, the pattern 12 is actually formed at the same position on the back surface of the substrate. This pattern 12 is for soldering the sandwiching piece 17 as described later, and by connecting this pattern 12 to a ground pattern or the like as necessary, the terminal plate is grounded to obtain a shield effect. May be.

The holding piece 17 may be formed by processing a metal plate material into a U-shape and welding it to the front surface of the metal plate 14 at a predetermined interval, or may be formed by punching the metal plate 14 itself at a proper position. Good. In any case, as shown in the drawing, when the front surface of the terminal board 13 intersects the edge of the printed board, each holding piece 17 holds and holds the board edge including the printed pattern 12 under pressure and dimensions. Etc. are set. The terminal 16 is formed by bending a portion of the terminal plate 13 projecting to the front side downward, and projecting a portion of the terminal plate projecting to the back surface (rear end) as shown in FIG. 2 (c).

The terminal board 1 is attached to the edge of the printed circuit board 10.
3 is assembled, first, as shown in FIG. 2 (a), with the substrate 10 tilted, the edge of the substrate is slightly inserted into the open side of the sandwiching piece 17, and then the substrate edge contacted with the sandwiching piece 17 is inserted. 2 (b)
After the horizontal posture as described above, the substrate edge is tightly fitted into the sandwiching piece 17 by further pushing in the direction of the arrow (b).
The substrate can be moved in the direction of the arrow by the length of the through hole 11. In the process of rotation shown in (a), the shape of the through hole 11, the size of the terminal 16 and the position where the terminal 16 is bent so that the bent end of the terminal 16 can be smoothly inserted into the through hole 11. Etc. are set appropriately beforehand.

Further, with the printed circuit board and the terminal board held in the posture of (b), cream solder is automatically applied to the circuit pattern, the printed pattern 12 and the through holes (not shown) on the printed circuit board, and then the component The type 18 is mounted, and finally, the cream solder is melted and solidified by the reflow method. As a result, the mechanical connection strength between the print pattern 12 and the sandwiching piece 17 is increased, and the terminal 1
Electrical and mechanical connection between the bent end of 6 and the through hole 11 can be realized.

The printed circuit board 1 thus assembled
0 and the terminal board 13 are handled as circuit unit parts, for example, by housing them in a case (not shown), and the ends of the terminals protruding from the back surface of the terminal board 13 are inserted into the through holes of another printed board (motherboard). It is used for various purposes such as being soldered and soldered.

[0013]

As described above, according to the present invention, the print pattern provided on the edge of the printed circuit board is clamped and held by the sandwiching piece provided on the terminal board, and one end of the terminal extending from the terminal board is attached to the printed board. After inserting into the through holes provided along the edge, all the electronic components mounted on the board were soldered together by reflow.
No screwing work using mounting brackets, no connecting work of terminals using lead wires, etc. is required, and many parts of the process can be automated.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a printed board and a terminal board according to an embodiment of the present invention.

2 (a), (b) and (c) are diagrams showing an assembling procedure.

3A and 3B are explanatory views of a conventional example.

[Explanation of symbols]

10 printed circuit boards, 11 through holes, 12 printed patterns, 13 terminal plates, 14 metal plates, 15 insulating materials, 16 terminals, 17 clamping pieces, 18 parts

Claims (2)

[Claims] 1. A printed circuit board on which a circuit pattern is formed is fixed in a state in which the front surface of the terminal board is in contact with the printed circuit board so that the front end portion of the terminal penetrates the terminal board. In a circuit unit electrically connected to a through hole, the through hole on the printed board is an elongated hole formed along the edge, and a printed pattern is formed on the edge, and the terminal is formed. On the front surface of the board, a bifurcated clamping piece for clamping and holding the edge of the board including the printed pattern is projected, and the front end of the terminal projected from the terminal board is inserted into the through hole of the printed board. A structure for connecting a terminal board to a printed circuit board, which is bent so that it can be attached. 2. The connection structure of a terminal board to a printed circuit board according to claim 1, wherein the connection between the front end portion of the terminal and the through hole is performed by reflow.