JPS5932150Y2 - Through hole bin for printed wiring board - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a through-hole pin for penetrating a printed wiring board and providing electrical continuity between its upper and lower surfaces.

Conventionally, this type of through-hole pin was made by rolling a single springy metal plate into a cylindrical shape with both ends facing each other with a slight gap, so that the outer diameter could expand or contract. Are known.

Such through-hole pins have a complicated manufacturing process and are relatively expensive for this type of pin, resulting in an increase in cost.In addition, when attaching to a printed wiring board, the outer diameter must be reduced or the amount of insertion into the printed wiring board must be reduced. A special jig is required to adjust this, which also causes an increase in costs.

The present invention was developed to eliminate the above-mentioned drawbacks of conventional products.It is significantly cheaper than conventional products, and can be easily installed on printed wiring boards without using any special jigs. The purpose is to provide a through-hole pin that can connect the upper and lower surfaces of the printed wiring board accurately and without expensive plating on the inner wall surface of the through-hole. Printed wiring that electrically connects the upper and lower surfaces of a printed wiring board by inserting a pin body into a through hole drilled in a printed wiring board having wiring and individually soldering the land portions on the upper and lower surfaces of the through hole. It is a through-hole pin of a plate, and a locking plate having a diameter larger than that of the pin body is provided at one end of the pin body, and the above-mentioned method is used so that a larger amount of solder can adhere when the locking plate side is soldered to a printed wiring board. A protrusion with a smaller diameter than the locking plate is provided at the center of the upper surface of the locking plate, and a bulge portion having a diameter slightly larger than the outer diameter of the pin body is partially protruded from the through hole near the other end of the pin body. The invention relates to a through-hole pin of a printed wiring board, which is characterized in that it is provided in a position such that it can be obtained.

The drawings will be explained in detail below.

Figures 1 to 4 show one embodiment of the present invention, and in the figures, 1 is a pin body made of a conductive material, for example, mild steel, and its length is slightly larger than the thickness of the printed wiring board, which will be described later. The outer periphery is tin-plated.

A disc-shaped locking part 2 having a diameter larger than the outer diameter of the main body 1 is formed at one end of the pin body 1, and a cylindrical projection 3 having a smaller diameter than the outer diameter of the locking part 2 is formed at the center of the upper surface. It is installed protrudingly.

On the other hand, at the other end of the pin body 1, slightly above the lower end, there is a pair of bulges 4 having a diameter slightly larger than the outer diameter of the pin body 1.
is provided in a protruding position such that a portion thereof can protrude from the through hole of the printed wiring board, which will be described later.

Manufacturing such a through-hole pin is extremely simple.

For example, a single raw material wire is cut into a predetermined length to form the pin body 1, and the upper end thereof is press-fitted into a mold with an inner diameter smaller than the outer diameter of the wire to form the locking part 2. The bulging portion 4 may be formed by pressing the other rear end.

Next, the fourth method of using the through-hole pin having the above structure is explained.
This will be explained using figures.

In FIG. 4, 10 is a printed wiring board, with 10a being the top surface and 10b being the bottom surface.

Reference numeral 11 indicates a through hole drilled in the printed wiring board 10 in advance.

First, the lower end of the pin body 1 is inserted into the through hole 11 from the upper surface 10a side of the printed wiring board with the locking portion 2 facing upward.

At this time, the diameter of the bulging portion 4 of the pin body 1 is the same as that of the through hole 11.
Since it is slightly larger than the inner diameter of the inner diameter, it will act as a resistance, but if you continue to forcefully fit it against this resistance,
Eventually, the locking portion 2 comes into contact with the upper surface 10a of the printed wiring board 10, thereby preventing the insertion.

After the fitting operation is completed in this manner, the joining point between the upper end side of the pin body 1 and the wound portion on the upper surface 10a side of the printed wiring board 10 is soldered.

By this soldering, solder 12 and 13 are attached to the outer periphery of the locking portion 2 and the protrusion 3 as shown in the figure.

Next, after the lead terminals of the other electric elements 14, 15 are inserted into predetermined locations on the printed wiring board 10, the lower surface 10b side of the printed wiring board 10 is soldered.

This soldering operation involves sequentially and continuously connecting a large number of bonding points using a method such as tip soldering.

At this time, high heat is conducted from the lower end side of the pin body 1 to the upper end side due to the high temperature heating of the lower surface 10b side of the printed wiring board 10.
Since the solder 12, 13 is sufficiently adhered and absorbs heat, cracking, peeling, etc. due to rapid heating of the solder 12, 13 can be prevented.

Incidentally, the protrusion 3 can also function as a knob during the above-mentioned insertion work, storage, storage, and organization.

As explained above, according to the through-hole pin for removing printed wiring according to the present invention, a locking plate having a diameter larger than that of the group pin body is provided at one end of the pin body, and when the locking plate side is soldered to the printed wiring board. Since a protrusion with a smaller diameter than the locking plate is provided at the center of the upper surface of the locking plate so that a large amount of solder can adhere to the plate, the protrusion can be used as a grip when inserting into the flint wiring board, and the print The soldering to the land part of the wiring board can be made stronger, and the soldering between the other end of the pin body and the land part on the first side of the printed wiring board prevents high heat from being conducted to the locking plate side during soldering work. However, the heat can be sufficiently absorbed without causing cracking or peeling, and furthermore, the bulging part with a diameter slightly larger than the outer diameter of the pin body can be inserted through the through hole near the end of the pin body. Since it is provided in such a position that a part of the pin can protrude, the area for soldering on the bottom side of the printed wiring board can be larger, and stronger soldering can be achieved. It has the advantage of being able to provide reliable electrical connection between the top and bottom surfaces of a printed wiring board, which is cheaper and more reliable than conventional through-holes, which are made by applying conductive plating to the inner wall surface. have.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a front view of a through-hole pin according to the present invention, FIG. 2 is a plan view of the same, and FIG.
The figures are an enlarged sectional view taken along the line III-II in FIG. 1, and FIG. 4 is an installation sectional view for explaining the usage method. 1... Pin body, 2... Locking plate, 3.
...Protrusion, 4...Bulge.

Claims (1)

[Scope of utility model registration request] The upper and lower surfaces of the printed wiring board are electrically connected by inserting the pin body into a through hole drilled in a printed wiring board that has wiring on the upper and lower surfaces and individually soldering to the lands on the upper and lower surfaces of the through hole. This is a through-hole pin for a printed wiring board, in which a locking plate having a larger diameter than the pin body is provided at one end of the pin body, and a larger amount of solder adheres when the locking plate side is soldered to the printed wiring board. As shown in FIG. A through-hole pin for a printed wiring board, characterized in that the pin is provided at a position such that the part can protrude.