JPH02139989A - Printed wiring board - Google Patents

Abstract

PURPOSE:To press a lead wire against a through-hole by its elasticity to obtain electrical continuity and eliminate necessity of temporary soldering by a method wherein the lead wire is bent after it is inserted into the through-hole and then inserted into another through-hole. CONSTITUTION:In order to provide temporary connection of an electronic component 2, after a lead wire 2a is inserted into a first through-hole 1a-1 first, the tip of the lead wire 2a is bent to form a U-shape toward a direction of an arrow A and inserted into a second through-hole 1a-2 and the lead wire 2a is lightly pulled up toward a direction of an arrow B. With this procedure, the lead wire 2a is laid across the through-holes 1a-1 and 1a-2 and, as if it sews the two through-holes 1a-1 and 1a-2, presses itself against both the through- holes by its elasticity to obtain electrical continuity. Therefore, test data can be obtained temporarily without temporary soldering of the lead wire. After a specification is determined, the lead wire is connected to the first through-hole by soldering permanently.

Description

[Detailed Description of the Invention] [Summary] This invention relates to a printed wiring board, and more specifically, to a printed wiring board equipped with through holes for temporarily connecting electronic components with lead wires, and which allows electronic components to be connected without soldering lead wires. For the purpose of temporary connection, it is provided with a first through hole through which a lead wire of an electronic component with a lead wire is inserted, and a second through hole through which the inserted lead wire is inserted with a folded back spring property, or the above-mentioned one is provided. 1st. The second through holes are configured to be connected.

[Industrial application field]

The present invention relates to a printed wiring board, and more particularly to a printed wiring board provided with through holes for temporarily connecting electronic components with lead wires.

In an electronic circuit, if the circuit constants have not been determined, some of the electronic components mounted on the printed wiring board, such as fixed resistors and capacitors with lead wires, can be temporarily connected to the actual electronic circuit on a trial basis. After determining the resistance, capacitance, etc., formal soldering is used to connect the parts. then,
There is a need for a printed wiring board that can temporarily connect electronic components with lead wires without soldering.

[Conventional technology]

Conventional printed wiring boards contain electronic components with lead wires such as fixed resistors and capacitors (hereinafter abbreviated as electronic components).
If you form a through hole to connect the through hole and temporarily solder (temporary connect) electronic components to the through hole, or if the number of temporary connections increases, there is a risk of thermal damage to the through hole and the board around it. After soldering a connection terminal to the through hole (main connection Vt), circuit constants are determined by temporarily soldering an electronic component to the connection terminal on a trial basis. Thereafter, electronic components of a predetermined value are formally connected to the through holes or connection terminals by soldering.

[Problem to be solved by the invention]

However, according to the above-mentioned printed wiring board, temporary soldering is required for temporary connection, and when performing formal soldering, workability is poor because the temporary solder must be removed cleanly. There was a problem in that the use of was not economical.

In view of the above problems, an object of the present invention is to provide a printed wiring board to which electronic components can be temporarily connected without soldering lead wires.

[Means to solve the problem]

In order to achieve the above object, the printed wiring board of the present invention has a first through-hole through which a lead wire of the electronic component is inserted, in order to easily temporarily connect the electronic component.
or a second through hole through which the inserted lead wire is inserted with a folded back spring property, or Second
The structure is such that the through-holes of the two are connected.

[Effect]

By folding the lead wire with spring properties and inserting it through the through hole, the lead wire can come into elastic contact with the through hole and be electrically connected, eliminating the need for temporary soldering.

〔Example〕

The gist of the present invention will be explained in detail below based on embodiments shown in the drawings.

FIG. 1 is a plan view of the main parts of the printed wiring board, and FIG. 2 is a side sectional view showing a temporarily connected state of electronic components.

As shown in FIG. 1, a printed wiring board 1 has a first hole having a diameter slightly larger than the diameter of a lead wire 2a through which a lead wire 2a of an electronic component 2 such as a fixed resistor or a capacitor is inserted.
a through hole 1a-1, and a second through hole 1a-2 having a hole diameter slightly larger than the diameter of the lead wire 2a through which the inserted lead wire 2a is inserted with a folded back spring property. First through hole 1a-1 and second through hole 1
A-2 should be slightly spaced apart to improve wiring efficiency.

To temporarily connect the electronic component 2, first insert the lead wire 2a into the first through hole 1a-1 as shown in Fig. 2, then bend the tip of the lead wire 2a into a U-shape in the direction of arrow A, and insert the second through hole 1a-1. Insert the lead wire 2a into the through hole 1a-2 and lightly pull up the lead wire 2a in the upward direction of arrow B. Then, Reed & I
2a is the first. It straddles between the second through holes 1a-1 and 1a-2, and has a spring property in a manner that stitches both the through holes 1a-1 and 1a-2, so that they can be elastically contacted and electrically connected. Therefore, test data can be temporarily collected without temporarily soldering the lead wires. Once the specifications (numbers of resistance or capacitance, etc.) are determined, the lead wires are formally connected to the first through-hole by soldering.

FIG. 3 shows a plan view of essential parts of a printed wiring board according to another embodiment. As shown in the figure, the printed wiring board 1° is located at the first. Second
A gourd-shaped through hole is provided by connecting the through holes 1a-1' and 1a-2''.Therefore, it does not take up much space and the wiring efficiency is even better than in the above embodiment.Electronic component 2
As shown in the side sectional view of Fig. 4, the temporary connection is made by connecting the lead wire 2.
After inserting the lead wire 2a into the first through hole 1a-1, the lead wire 2a is bent into a V shape in the direction of arrow C and inserted into the second through hole. By simply pulling the lead wire 2a upward in the direction of the arrow, the constriction bites into the inside of the bent part and expands the V-shape.
1'.

1a-2°, and more reliable conduction can be obtained.

In this way, the first
．． By providing a second through hole, after inserting the lead wire into the first through hole, fold it back into a U-shape or 7-shape, and then insert it into the second through hole and pull up the lead wire, eliminating the need for temporary soldering. can be electrically connected to the terminal, eliminating the need for conventional connection terminals.

〔Effect of the invention〕

As detailed above, according to the present invention, it is possible to temporarily connect electronic components without temporarily soldering the lead wires, improving work efficiency, and eliminating the need for connection terminals, which is economical. It exhibits extremely useful effects in industry, such as improving the

3 is a plan view of essential parts of a printed wiring board according to another embodiment of the present invention, and FIG. 4 is a side sectional view showing a temporary connection state of electronic components using FIG. 3. .

In the figure, 1 is a printed wiring board, 1a-1 and 1a-2 are 1st. Second throughhole, 1a-
1', 1a-2' is the first. The second through hole, 2 is an electronic component (with a lead wire), and 2a is a lead wire.

[Brief explanation of the drawing]

FIG. 1 is a plan view of essential parts of a printed wiring board according to an embodiment of the present invention, and FIG. 2 is a temporary connection state of electronic components using FIG. 1.
figure

Claims (1)

[Claims] [1] Lead wire (2a) of electronic component with lead wire (2)
A printed wiring characterized by comprising a first through hole (1a-1) through which the lead wire (2a) is inserted, and a second through hole (1a-2) through which the inserted lead wire (2a) is inserted with a folded back spring property. Board. [2] The first and second throughholes (1a-1, 1a-
2) The printed wiring board according to claim 1, wherein the printed wiring board is connected to the printed wiring board.