JPH0644038U - Metal elastic terminal - Google Patents

Abstract

(57) [Abstract] [Purpose] A metal elastic terminal that is inserted into a through hole of a printed circuit board and conducts to a conductive portion of the peripheral wall of the through hole can obtain appropriate insertion load and contact load even though it has a two-dimensional shape. To obtain a metal elastic terminal having elasticity. A pair of substantially parallel contact legs that should come into contact with the through holes are provided, and a maximum width of the pair of contact legs in a free state is set to be larger than an inner diameter of the through hole. A metal elastic terminal in which at least one connecting leg having an inclined portion that is not orthogonal to the contact leg is connected. 【Constitution】

Description

[Detailed description of the device]

[0001]

【Technical field】

 The present invention relates to a metal elastic terminal used by being inserted into a through hole of a printed circuit board.

[0002]

[Prior art and its problems]

 This type of metal elastic terminal is required to have elasticity that expands in the radial direction of the through hole because it is electrically connected simply by inserting it into the through hole. This radial elasticity is preferably such that the insertion load is small and the contact load is large, and various structures have been proposed in the past. As a typical one, it is known that a contact portion with a through hole is given a three-dimensional shape to obtain elasticity in the radial direction, and a well-balanced insertion load and contact load can be obtained. It has inevitable drawbacks such as poor workability and high cost.

Therefore, a metal elastic terminal having a two-dimensional shape that is inexpensive to manufacture, that is, a metal elastic terminal having a uniform shape in the thickness direction has been proposed. However, a conventional two-dimensional shape terminal has an appropriate diameter. It was difficult to obtain directional elasticity. In other words, it is difficult to obtain a well-balanced insertion load and contact load. For example, if insertion into a through hole is easy, the contact load will be small, and conversely if the contact load is increased, the insertion load will also be increased. Will end up.

[0004]

[The purpose of the device]

 The present invention has an object to obtain a metal elastic terminal capable of obtaining good radial elasticity even though it has a secondary shape, based on the awareness of the problems of the conventional metal elastic terminal. In other words, the purpose is to obtain a metal elastic terminal that has a small insertion load and a large contact load even though it has a two-dimensional shape.

[0005]

SUMMARY OF THE INVENTION The present invention is a two-dimensional metal elastic terminal which is inserted into a through hole of a printed circuit board and conducts to a conductive portion of the peripheral wall of the through hole. The contact legs are provided, the maximum width of the pair of contact legs in the free state is set larger than the inner diameter of the through hole, and the pair of contact legs are not orthogonal to the contact legs. It is characterized in that they are connected by at least one connecting leg having an inclined inclined portion.

According to this metal elastic terminal, since the pair of contact legs are connected by the connection leg having the inclined portion, it is possible to obtain appropriate radial elasticity. In other words, if the connecting legs do not exist, both contact legs are easily set, so both the insertion load and the contact load are small.On the other hand, if this connecting leg is orthogonal to both contact legs, both contact legs are deformed. Since it is difficult, the insertion load will increase. On the other hand, according to the connecting leg having the inclined portion, both the insertion load and the contact load can be obtained with good balance.

[0007] The connecting leg may be one in which the whole is simply tilted, but in particular, a pair of reverse tilt portions that are substantially symmetrical with respect to the center of the pair of contact legs and tilt in opposite directions. More preferable results can be obtained by constructing from the above.

[0008]

【Example】

 The present invention will be described below with reference to illustrated embodiments. The metal elastic terminal 10 of the present invention is inserted into the through hole 22 of the printed board 21. A conductive portion 23 is formed on the peripheral wall of the through hole 22 and the conductive portion 23 is electrically connected to a wiring pattern (not shown).

The metal elastic terminal 10 has a two-dimensional shape that can be formed by press forming. The metal elastic terminal 10 has a shunt portion 11 having a diameter sufficiently smaller than that of the through hole 22, followed by a contact portion 12 with the through hole 22 and a through hole 22. It has a boss portion 13 that is sufficiently wider than the inner diameter of the through hole 22 and regulates an insertion end into the through hole 22, and a back surface extension portion 14 continuing from the boss portion 13. The feature of the present invention lies in the shape of the contact portion 12.

The contact portion 12 has a pair of parallel contact legs 15, and the pair of contact legs 15 are connected by a connecting leg 16. The maximum width s between the outer surfaces of the pair of contact legs 15 is set to be slightly larger than the inner diameter p of the through hole 22. On the other hand, the connecting leg 16 has a substantially V shape. That is, the connecting leg 16 has a pair of reverse sloping portions 17 that are substantially symmetrical with respect to the center of the pair of contact legs 15 and are inclined in opposite directions. The reverse sloping portion 17 of the connecting leg 16 is not orthogonal to the contact leg 15 and is inclined at an appropriate angle. The pair of contact legs 15 and the shunt portion 11 are connected by a V-shaped portion 18.

The metal elastic terminal 10 having the above structure is inserted into the through hole 22 of the printed board 21 from the shunt portion 11 side. Then, since the maximum width s of the pair of contact legs 15 of the contact portion 12 is larger than the inner diameter p of the through hole 22, the V-shaped portion 18 between the shunt portion 11 and the contact portion 12 contacts the through hole 22. When an insertion load is applied in this state, the contact portion 12 and the connecting leg 16 are elastically deformed and inserted into the through hole 22, and the outer surface of the contact portion 12 and the conductive portion 23 are mechanically and electrically sufficient. Contact with a contact load.

When the contact portion 12 is elastically deformed, the pair of reverse inclined portions 17 of the connection leg 16 play a main role. Since the pair of reverse-direction inclined portions 17 are inclined with respect to the contact legs 15 without being orthogonal to each other, they are easily elastically deformed. On the other hand, the contact portion 12 is less likely to be deformed than when the connection leg 16 is not present. Therefore, by appropriately setting the width and the length of the reverse sloping portion 17, it is possible to obtain appropriate insertion load and contact load. Further, since the pair of reverse inclined portions 17 of the connecting leg 16 do not buckle as in the case of being orthogonal to the contact leg 15, for example, a proper contact load can be maintained for a long time even after the insertion. can do. Further, the metal elastic terminal 10 once inserted can be pulled out and then reused.

Since the metal elastic terminal 10 of the present invention has a two-dimensional shape and a uniform shape in the thickness direction, it can be manufactured at low cost by press molding. FIG. 5 shows an example of punching in the case of press molding, in which one metal elastic terminal 10 is formed for each positioning hole 25 of the continuous strip 24. The continuous strip 24 and the metal elastic terminal 10 are thin portions 26. It is connected. In use, it cuts at the thin portion 26.

FIG. 6 shows another embodiment of the present invention. This embodiment is an example in which the connection leg 16A connecting the pair of contact legs 15 of the contact portion 12 is simply inclined in one direction. That is, the entire connecting leg 16A is the simple inclined portion 17A. Also in this embodiment, the same operational effect as that of the first embodiment can be expected.

[0015]

[Effect of device]

 As described above, according to the metal elastic terminal of the present invention, it is possible to obtain a balanced insertion load and contact load with respect to the through hole of the printed circuit board while having a simple two-dimensional uniform shape in the thickness direction. You can That is, an adaptive contact load can be obtained while the insertion load is relatively small.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a metal elastic terminal of the present invention before being inserted into a through hole of a printed circuit board.

FIG. 2 is a plan view of the main part.

3 is a sectional view taken along the line AA of FIG.

4 is a cross-sectional view taken along the line BB of FIG.

5 is a plan view showing a press punching state of the entire metal elastic terminal of FIG. 2. FIG.

FIG. 6 is a plan view corresponding to FIG. 2, showing another embodiment of the present invention.

[Explanation of symbols]

 10 metal elastic terminal 11 shunt part 12 contact part 13 boss part 15 contact leg 16 16A connecting leg 17 reverse tilted part 17A simple tilted part 21 printed circuit board 22 through hole 23 conductive part s maximum width of contact leg p through hole inner diameter

Claims (2)

[Scope of utility model registration request] 1. A metal elastic terminal which is inserted into a through hole of a printed circuit board and is electrically connected to a conductive portion of a peripheral wall of the through hole, has a uniform shape in a thickness direction; and is substantially parallel to be in contact with the through hole. A pair of contact legs, and the maximum width of the pair of contact legs in the free state is larger than the inner diameter of the through hole; and the pair of contact legs are not orthogonal to the contact legs. Connected by at least one connecting leg having an inclined bevel; a metal elastic terminal. 2. The metal elastic terminal according to claim 1, wherein the connection leg has a pair of reverse-direction inclined portions that are substantially symmetrical with respect to the center of the pair of contact legs and are inclined in opposite directions.