JP2562323Y2 - Tab terminal - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tab terminal mounted on a printed circuit board.

[0002]

2. Description of the Related Art FIG. 4 shows a through-hole type tab terminal having a large current capacity mounted on a printed circuit board. The tab terminal 1 includes leads 1b and 1c formed on both lower ends of a connecting portion 1a and these terminals. A lower end (hereinafter, referred to as an “extended portion”) 1 d of the connecting portion 1 a extending between the leads 1 b and 1 c is inserted into a long hole 2 a formed in the printed circuit board 2 and protrudes to the rear surface side. It is soldered to a land formed around the long hole 2a. The tab terminal 1 having such a large current capacity is formed by folding a thin plate having a predetermined thickness (t = 0.4 mm) into two to form a connecting portion 1a having a thickness of 2t and an extending portion 1d. The thickness of the leads 1b and 1c is t.

The tab terminal 1 having such a shape is formed by punching a brass plate having a thickness t having tin plating on both sides by a press and then folding the connection portion in two.
For this reason, the surface of the material (brass) is exposed at each end face cut by the press, and the surface is oxidized when the storage period from manufacture to mounting on a printed circuit board is prolonged, and soldering is poor. Problem.

Therefore, as shown in FIG. 5, a material having a thickness of 2t is used, and a lower half portion for forming a lead is shaved to a half thickness t, cut into a predetermined shape by press working, and then plated. The so-called post-plating process is performed. Thereby, the entire surface of the material is plated. The connecting portion 3e between the connecting portion 3a and the leads 3b, 3c is a tapered surface whose thickness gradually decreases from the connecting portion 3a toward the leads 3b, 3c. Therefore, the extension 3d between the leads 3b and 3b has the same plate thickness t as those of the leads 3b and 3c.

The tab terminal 3 is connected to a lead 3 as shown in FIG.
b, 3c and the extension 3d are inserted into the long hole 2a of the substrate 2, and the leads 3b, 3c protruding from the back surface 2b are cut to a predetermined length, clinched and temporarily fixed, and then the leads 3b, 3c The entire extension 3d is soldered to the land 2c. Thereby, the cross-sectional area of the tab terminal 3 connected to the land 2c becomes the same as the cross-sectional area of the connection portion 3a, and the current capacity is secured. The tab terminal 3 has advantages such as no need for bending, a narrow material width, and a rigid feeling.

[0006]

However, in the tab terminal 3, since the connecting portion 3e between the connecting portion 3a and the leads 3b and 3c has a tapered surface, the plate thickness of the extending portion 3d is reduced. When inserted into the long hole 2a of the printed circuit board 2,
Even if it is temporarily fixed by clinch, there is a problem that it is easy to fall as shown by a solid line and a two-dot chain line in FIG. When the tab terminal 3 is soldered and fixed to the land 2c in such a state that the tab terminal 3 is largely collapsed, not only the appearance is poor but also the connection with the other party becomes difficult. Also,
After the mounting, it is difficult to correct the tab terminals 3 so as to be perpendicular to the substrate 2, and in some cases, there is a problem that the lands 2c may be damaged.

The present invention has been made in view of the above points, and has been made to reduce the angle of inclination when mounting a tab terminal of a type in which the thickness of a lead is reduced to a connecting portion on a printed circuit board. It is an object of the present invention to provide a tab terminal that has been made.

[0008]

According to the present invention, in order to achieve the above object, according to the present invention, the connecting portion is formed of a material in which the thickness of the lead portion is reduced to be thin, and at least both sides of the lower end of the connecting portion. And the connecting portion has a lower end of the connecting portion and an extending portion extending between the leads. Each of the leads and the extending portion is inserted into a long hole of the printed circuit board. In the tab terminal of the type to be mounted by mounting, the extension portion is formed in a shape in which the extension portion is bent toward the side having the reduced thickness by the reduced thickness.

[0009]

The tab terminal is mounted by inserting each lead and an extension at a lower end of a connection portion extending between these leads into a long hole of a printed circuit board. In the tab terminal, since the extension between the leads is warped by the thickness of the side where the thickness has been cut off, the fall in the elongated hole is restricted. As a result, the inclination of the tab terminal after mounting on the printed circuit board is significantly reduced, and the backlash is reduced.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings. In FIG. 1, the tab terminal 5 has three leads 5b to 5d formed on the left and right sides and the center of the lower end of the connecting portion 5a. The connecting portion 5a has a predetermined thickness 2t (= 0.8 mm).
), And the thickness of the leads 5b to 5d is half the thickness t (= 0.4 mm) of the connection portion 5a. The connecting portion 5e of the connecting portion 5a and the leads 5b to 5d is connected to the connecting portion 5e.
It is a tapered surface whose thickness gradually decreases from the a side to the leads 5b to 5d side. That is, the tab terminal 5 is made of a material (a brass plate) in which the lower half of one side surface (hereinafter referred to as “surface”) of the plate thickness 2t is shaved to have a plate thickness t, and the upper and lower connecting portions are tapered. ).

The lower ends 5f and 5g of the connecting portion 5a between the leads 5b to 5d are extended downward in the form of tongues to form extensions. These extending portions 5f and 5g are a part of the continuous portion 5e and have a tapered surface, and the lower portion has the same plate thickness as the leads 5b to 5d. And these extension parts 5f,
5g, as shown in FIG. 2, each lower end 5f ', 5g' is warped by the shaved surface of the leads 5b to 5d, that is, the surface side, and by the shaved thickness t. As a result, the overall plate thickness in the vicinity of the connecting portion 5e between the connecting portion 5a and the leads 5b to 5d becomes the plate thickness t of the leads 5b to 5d and the lower end 5e.
f and 5g, which are the sum 2t of the warped portions t of the tips 5f 'and 5g'.

The connecting portion 5a has ears 5h on the left and right sides of the lower part,
5h is formed, a hole 5i is formed substantially in the center, and both upper surfaces and both left and right sides are chamfered in a tapered shape. The lower ends of the leads 5b to 5d are connected to the base 5j. The base 5j is provided with a positioning hole 5k. The tab terminal 5 is formed into such a shape by press working, and then tin-plated. Therefore, the tab terminals 5 are plated with tin on the entire surface. The tab terminal 5 formed in this manner is a taping tab terminal in which the base 5j is sequentially adhered to a belt-shaped mount with a belting tape (both not shown) at predetermined intervals.

The operation will be described below. When the taped tab terminal 5 is mounted on a printed circuit board, the leads 5b to 5d are cut off to a predetermined length from the base 5j by the supply device, and these leads 5b to 5d and the lower ends 5f and 5g of the connecting portion 5a are connected as shown. As shown in FIG. 3, the printed circuit board 2 is inserted substantially vertically into the elongated hole 2a from the upper surface side. And the connection part 5
The ears 5h, 5h on both the left and right sides of the lower part of a are locked to the periphery of the opening end of the elongated hole 2a, and the lower ends 5f, 5g of the leads 5b to 5d and the connecting part 5a are positioned. After the leads 5b to 5d and the extensions 5f and 5g are inserted into the elongated holes 2a, the tab terminals 5 are cut into predetermined lengths from the back surface of the printed circuit board 2 and clinched, and are temporarily fixed. Is done.

The tab terminals 5 are formed by bending the lower ends 5f 'and 5g of the lower ends 5f and 5g in a state where the lower ends 5f and 5g of the leads 5b to 5d and the connecting portion 5a are inserted into the elongated holes 2a.
g ′ faces the inner surface near the opening end of the long hole 2a on the land 2c side together with the lower portion of the connecting portion 5a with a slight gap. That is, the tab terminal 5 has a thickness of 2t in the elongated hole 2a. As a result, the inclination angle of the tab terminal 5 is significantly reduced when the leads 5b to 5d and the lower ends 5f and 5g of the extending portions are inserted into the elongated holes 2a. As a result, the play of the tab terminals 5 in the state where the tab terminals 5 are temporarily fixed to the printed circuit board 2 is extremely reduced.

In the above embodiment, the tab terminals 5
Has been described in connection with the case where three leads 5b to 5d are provided. However, the present invention is not limited to this, and it is needless to say that the same can be applied to a case where two leads are provided on both sides.

[0016]

[Effect of the Invention] As described above, according to the present invention, the inclination angle when the tab terminal is mounted in the long hole of the printed circuit board can be made very small, and as a result, the backlash is reduced, and the mounting is reduced. The appearance of the printed circuit board can be improved later, and the connection with the terminal of the other party can be made smooth. In addition, there is an effect that it is not necessary to correct the tab terminal from falling after mounting.

[Brief description of the drawings]

FIG. 1 is a front view showing one embodiment of a tab terminal according to the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view of a main part showing a state where the tab terminal of FIG. 1 is mounted on a printed circuit board.

FIG. 4 is a partially cutaway perspective view of a conventional tab terminal.

FIG. 5 is a perspective view of a conventional tab terminal.

6 is a cross-sectional view of a main part showing a state where the tab terminal of FIG. 5 is mounted on a printed circuit board.

FIG. 7 is a diagram showing a state in which the tab terminal of FIG. 6 is tilted.

[Explanation of symbols]

 2 Printed circuit board 2a Slot 2c Land 5 Tab terminal 5a Connecting part 5b-5d Lead 5e Connecting part 5f, 5g Extension part

Claims (1)

(57) [Scope of request for utility model registration] 1. A connecting portion formed of a material in which the thickness of a lead portion is reduced by reducing the thickness of the connecting portion, two leads formed on at least both sides of a lower end of the connecting portion, and a lower end of the connecting portion. An extension portion extending between the leads of the tab terminal of a type in which each of the leads and the extension portion is inserted and mounted in a long hole of a printed circuit board, wherein the extension portion is A tab terminal characterized in that the tab terminal has a shape that is warped to the side where the plate thickness has been cut by the cut thickness.