JPS6396992A - Board with hole for holding lead wire - Google Patents

Abstract

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

Description

[Detailed Description of the Invention] <Industrial Application Field> This invention is useful when temporarily fixing an electronic component with a lead wire to a printed circuit board, for example, using a lead wire, or simply fixing an electronic component with a lead wire in the middle of a lead wire and a predetermined position. The present invention relates to a board with a lead wire holding hole that is used when holding the lead wire on the board.

<Conventional technology> When assembling a specified electrical product using electronic components with lead wires, even if the electronic components are eventually fixed securely, they are temporarily fixed until a certain step. There are cases where the process is moved between processes. For example, when assembling each component as shown in FIG. As, lead +
! This is a case where the electronic component 4 is securely fixed by going through another process such as connecting the end of the electronic component 3 to a predetermined connection position, and finally assembling the case component 5.6 and the printed circuit board 1. In such cases, the electronic part number has been temporarily fixed by adhering it to the printed circuit board 1 with an adhesive, or by soldering the lead wire to the printed circuit board 1 at the shortest distance.

<Problems to be solved by the invention> When parts with conventional IJ-F wires are temporarily fixed using adhesive, it takes time for the adhesive to dry, and if vibration etc. are applied before the adhesive is sufficiently dried, the adhesion may occur. There was a problem with the position changing or coming off. In addition, if temporarily soldering the lead wire to the printed circuit board at the shortest distance, it is necessary to use another lead wire when the lead wire needs to be connected to other parts or locations. There have been problems such as an increase in the number of connection parts and the fact that it is not always easy to position electronic components and solder short lead wires. In either case, assembly takes time and effort.

Another problem with electronic components having relatively long lead wires is that even if the electronic components can be temporarily fastened well, if the lead wires are free, they may interfere with work in other processes.

Means for Solving the Problems> The means of the present invention is such that two or four circular holes, which are slightly larger than the cross-sectional dimension of the coated wire with a predetermined outer diameter, are continuous in a gourd shape. In the case of the gourd-shaped hole, the distance between protrusions that are continuously drilled in a predetermined substrate in a quatrefoil shape and that face each other on the inner periphery of the hole is equal to the predetermined outer diameter and The leaf-shaped hole is characterized in that it is enlarged to be approximately twice the predetermined outer diameter.

In the invention, one lead wire is bent in half at a desired holding position into a gourd-shaped hole, the bent part is inserted, and the lead wire is led to the opposite side of the board. The lead wire is held in a state of being held by protruding the lead wire by about 2 to 3 times the diameter of the wire. In addition, align the two lead wires parallel to the quatrefoil-shaped hole, bend them in half at the desired holding position, insert the bent part, and insert the bent part into the opposite side of the board. By making the lead wire protrude by about three times as much, the lead wire is held in a state. The lead wires in this held state are relatively easy to wave if all of them, that is, two or four of them are pulled at the same time, but they do not easily come off when one of the series of lead wires is pulled.

This means that when one side is about to be pulled out, the bent part that was folded in half during insertion is pulled into the hole, but in this case, the bent part is extended and the other part is folded. By being able to bend, the reaction forces from both sides will act to prevent it from being pulled out. The reason why the distance between the protrusions is set to be approximately equal to the outer diameter of the lead wire or twice the outer diameter is to enable insertion of the bent portion and to make it as difficult as possible to remove the lead wire after insertion. Note that if the lead wire has a relatively soft covering, it is preferable to take this into consideration and make the distance between the protrusions slightly short enough to not interfere with insertion of the bent portion.

<Example> A first example will be described using FIGS. 1 to 3. This embodiment is implemented in the same electrical product as described using FIG. 5, and the same parts and portions are indicated by the same reference numerals in the figure. In the figure, reference numeral 1 denotes a substrate, in which a hole 10 for holding a lead wire 3 is bored.

Four holes 10 are provided, two on each side of the notch 2 in which the electronic part number is located. The hole 10 is calabash-shaped, and as shown in the enlarged view in FIG. In other words, the distance between the opposing protrusions 11 and 11 on the inner circumferential surface is expanded to be equal to the outer diameter dimension of the lead wire 3. To explain the dimensions a, b, and c shown in the figure, dimension a is equal to the diameter of the lead wire, and the dimension is 1.1 of dimension a.
The dimension C is 2.2 times the dimension a. This dimensional relationship is that dimension S is 1.05 to 1.2 times a, and dimension C is 2.1 times a.
The hole 10 is preferably set within a range of about 2.4 times. If the hole 10 is provided and an electronic part number is temporarily attached to the board 1, the result will be as shown in FIG. That is, each lead wire 3 may be folded in half at an appropriate position and then pushed into the hole 10.

Since each lead wire 3 is held on the board 1 at a position close to the electronic component 4, the electronic component number is temporarily fixed at that position.

A second embodiment will be explained using FIG. 4. The figure shows lead wire 3
A hole 20 for holding two pieces together is shown. This hole 20 is formed by combining the two holes 10 on both sides in the first embodiment into one, and has a monolobal shape. This shape has four circles slightly larger than the outer diameter of the lead wire 3 arranged on the same circumference and overlapping each other with a slight distance t, between the opposing protrusions 21X and 21. The dimension d is twice the outer diameter of the Riet wire 3. In the figure, the protrusion 22.2
The space between the two parts is shown enlarged in the same way, but since it is possible to insert a lead wire by enlarging one part, the other part can be omitted.

If this hole 20 is provided in place of the two holes O on each side in Fig. 1, and the two lead wires 3. Each book is held, and electronic part numbers are temporarily attached in substantially the same manner as in the first embodiment.

All of the above embodiments are for holding lead wires for temporarily fixing electronic components, but in some cases, the lead wires may be held in the middle of a relatively long lead wire to restrain it in a predetermined position. .

Although the substrate in the above embodiment is a printed circuit board, it may also be a simple plate of plastic or metal, and the holding effect of the lead wires will hardly change.

Effects of the Invention According to the present invention, since lead wire holding holes are provided in the board and the lead wires are held by simply pushing them in, no adhesive or solder is required, and no bonding work or soldering is required. Electronic components can be temporarily attached to a board with a simple process that requires less effort and time than mounting. It can also be used to restrain the slack portion of the lead wire in a proper position on the board, in which case no separate restraining part is required.

[Brief explanation of the drawing]

FIG. 1 is a partial enlarged plan view of a board according to a first embodiment of the present invention, FIG. 2 is a partial front view showing a state in which electronic components are temporarily fixed to the board of the same embodiment, and FIG. 3 is a partial front view of a board of the same embodiment. FIG. 4 is an enlarged plan view of the hole 10, and FIG. 4 is an enlarged plan view of the hole 20 of the second embodiment.
The figure is an exploded view of only the main parts of a conventional electrical product (a
) is a case part, (b) is an electronic component with lead wire, (C) is
FIG. 3 is a perspective view showing a board, and FIG. 3(d) is a perspective view showing a case component. 1... Board, 3... Lead wire, 4... Electronic component,
10... Hole (gourd shape), 20... Hole (
quatrefoil). Age/I¥1/U Age 2 Figure Age 3 Figure Age 4

Claims (1)

[Claims] (1) Two circular holes that are slightly larger than the cross-sectional dimension of the covered lead wire with a predetermined outer diameter are connected in a gourd shape, or four holes are connected in a quatrefoil shape on a predetermined board. The distance between the protrusions that are bored and facing each other on the inner periphery of the hole is set to the predetermined outer diameter in the case of the gourd-shaped hole, and the distance outside the predetermined diameter in the case of the quatrefoil-shaped hole. A board with a lead wire holding hole that is enlarged to be approximately twice the diameter.