JPS6321104Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a structure of a terminal for a circuit board that facilitates attachment of a terminal for supporting and fixing a circuit board carrying an electronic circuit to a case or the like.

It is generally common practice to provide input/output terminals for electronic circuits on printed circuit boards mounted with electronic circuits, but conventional printed circuit board terminals 1 are rod-shaped terminals as shown in Figure 1 A and B. A collar 1a is formed on the printed circuit board 2, and the collar 1a is inserted into the insertion hole 3 having approximately the same diameter as the terminal, and the terminal head is bent and temporarily fixed, or a rod-shaped A flange portion 1b larger than the diameter of the insertion hole 3 of the printed circuit board 2 is formed on the terminal head, and the diameter of the rod-shaped terminal is approximately the same as that of the insertion hole 3, and the tip is tapered for easier insertion. After inserting and temporarily fixing the flange 1b so that it locks into the insertion hole 3,
It was fixed using solder. Further, as shown in FIGS. 2A and 2B, a collar 1a is formed on the terminal 1 of the plate-shaped body, which is longer than the rectangular insertion hole 3 formed in the printed circuit board 2, and the insertion hole 3 is formed on the head of the terminal 1. A locking portion 1b is formed shorter than the insertion hole 3, and the locking portion 1b is inserted into the printed circuit board 2 and the collar 1a is locked so that the locking portion 1b protrudes beyond the insertion hole 3. After temporarily fixing it by twisting it as shown, it was permanently fixed using solder.

However, these methods require work to deform the head after insertion, and in order to prevent sagging, it is necessary to make the terminal diameter approximately the same as that of the insertion hole 3. This is troublesome, and conversely, if the terminal diameter is made small, there is a risk that it will rattle and fall out easily, and as a result, it is difficult to insert and temporarily secure the terminal before soldering, making it unsuitable for mass production. The quality was unfavorable. Further, it has various drawbacks in that it cannot be inserted using an automatic terminal insertion machine.

This invention eliminates the above-mentioned drawbacks of the conventional circuit board, does not require deformation work after insertion, makes it extremely easy to insert and temporarily fix terminals before fixing with solder, and has improved reliability. This provides the structure of the terminal for use.

This invention will be explained below with reference to drawings of one embodiment.

In FIG. 3, reference numeral 4 designates a cylindrical or prismatic rod-shaped terminal of this invention, and the surface of the terminal base is plated with tin to improve soldering. The terminal forms a cylindrical or prismatic body portion 4a having a diameter somewhat larger than the diameter of the terminal insertion hole 6 of a printed circuit board 5 on which an electronic circuit is mounted, and a length equivalent to the thickness of the printed circuit board. One end thereof has a cylindrical or prismatic leg portion 4b with a diameter smaller than the diameter of the printed circuit board insertion hole 6, and the other end has a cylindrical or prismatic collar portion 4c with a diameter larger than the diameter of the body. However, these are integrally formed.

That is, the terminal 4 configured as described above is inserted into the insertion hole 6 of the printed circuit board 5 from above, and the
When the body 4a reaches the flange 4c, tap the flange 4c with a jig or the like to fit the body 4a tightly into the insertion hole 6, and securely hold the terminal 4 in place by the flange 4c. It will be fixed.

As described above, this invention provides a terminal for supporting a circuit board, in which the terminal is made into a rod-shaped body, and the body has a cylindrical or prismatic body with a diameter somewhat larger than the diameter of the insertion hole of the printed circuit board, and the insertion hole A cylindrical or prismatic foot portion formed at one end of the body and having a diameter smaller than the diameter of the body, and a cylindrical or prismatic collar portion having a diameter larger than the diameter of the body and formed at one end of the body. When inserting it, you only need to insert a leg part with a smaller diameter than the insertion hole, so it is easier to insert it than when inserting a leg part with approximately the same diameter. Furthermore, when temporarily fixing the terminal, the body tightly fits into the insertion hole, so the terminal will not rattle or fall out even if it is carried before being soldered.

Further, by forming the cylindrical or prismatic flange, the tensile strength in the terminal insertion direction is improved, and reliability is improved. Furthermore, since no complicated work is required for insertion as described above, it is also possible to automate the attachment of the terminal.

Therefore, its workability is significantly improved, making it suitable for mass production and of great practical value.

[Brief explanation of drawings]

1 and 2 are sectional views showing a conventional printed circuit board terminal, FIGS. 3A and 3B are sectional views showing an embodiment of the invention, and FIG. 3C is a perspective view thereof. 4...terminal, 4a...body, 4b...leg, 4
c...Flame, 5...Printed circuit board, 6...Insertion hole.

Claims (1)

[Scope of utility model registration request] In a terminal for supporting a circuit board, the terminal is a rod-shaped body, and has a cylindrical or prismatic body portion with a diameter somewhat larger than the diameter of the insertion hole of the printed circuit board, and a body portion with a diameter smaller than the diameter of the insertion hole. It is formed from a cylindrical or prismatic foot portion formed at one end and a cylindrical or prismatic collar portion having a diameter larger than the diameter of the body portion and formed at the other end of the body portion. A structure of a circuit board terminal characterized by: