JPS6037224A - Contact spring and production method - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a contact spring and a method of manufacturing the same. More particularly, the present invention relates to a one-veneer contact spring that can be manufactured in strip configuration, has two opposing streaking legs, and can be used in pre-main technology. % in press-in technology, 2.54
A large number of contact springs in the form of strips with center distances such as - are required, and the contact springs are, for example, pre-installed in a circuit board.

PRIOR ART AND PROBLEMS TO BE SOLVED BY THE INVENTION West German Patent Publication No. 2631-107 discloses a one-veneer contact spring suitable for press-in technology, which has two springs extending in one direction from the leg joint. Opposed spring legs are provided with press-in bins extending in opposite directions from the leg coupling portions. This known substantially box-shaped contact spring has the disadvantage that a deployment greater than the center distance is required in order to obtain two contact legs facing each other.

U.S. Pat. No. 2,779,011 shows a contact spring for a thermionic bulb or discharge tube. This contact spring, which is not intended for the Zoremain technology and which is suitable for this purpose but has a one-piece design, has two opposing spring legs in its final form, which are made from a flat metal plate. are cut and stamped, each spring leg being cut and stamped in the same angular direction about its respective longitudinal axis in a parallel plane oblique to the direction of pressure application and the plane to be joined. It is manufactured by being twisted. Such a contact spring has the disadvantage that it requires a lot of space to obtain spring legs of the same width. The disadvantage of a small open space between the spring legs can only be obtained at the expense of the width of the spring legs.

Specifically, it is an object of the invention to provide a one-piece contact spring having opposed spring legs. This contact spring is particularly suitable for pre-main technology. Furthermore, the contact spring according to the invention can be manufactured in strip form with a center distance of, for example, 2.54 m+. Furthermore, the contact spring according to the invention can be manufactured in large numbers in a short time with low manufacturing costs and material consumption.

The problem addressed by the present invention is to overcome the disadvantages of the prior art and to provide a one-piece contact spring which can be manufactured in strip configuration and has two opposing spring legs.

Means for Solving the Problem According to the present invention, in order to solve this problem, in a one-piece contact spring of the kind described above, one spring leg is in one plane and the front side of the other spring leg is in one plane. facing the rear side of the spring legs, said one spring leg being movable, i.e. twisted from its original position.

According to a preferred embodiment of the invention, after stamping from the strip, one spring leg remains approximately in that position and the other spring leg is positioned in front or behind the one spring leg. The spring legs are preferably bent at an angle to form two fully wide spring legs. Bringing the other spring leg in front of or behind the one spring leg is preferably carried out by a two-speed diagonal bending of the other spring leg.

The invention further relates to a method for manufacturing a contact spring of the type mentioned above. To this end, the invention provides that, after stamping the contact spring to its original shape and, if possible, forming a rounded surface (crown) on the tip of the contact spring, one spring leg is connected to the spring of the other. Moved relative to the legs, the spring leg is positioned behind the other, thus forming the desired contact spring.

Other advantages and details of the invention will become clearer from the implementation with reference to the drawings.

Example The details are explained below with reference to the drawings.

In the figure, several contact spring elements 1 are shown arranged on a metal strip 2 . The contact spring element 1 shown in FIG. 1 is preferably stamped from a metal strip. Each contact spring element 1 has at its one end a contact spring in the contact spring region indicated by 3, which contact spring comprises two spring legs, namely a first and a second spring leg 9.8. There is. In the embodiment shown, the contact spring region 3 is joined to a press-in region 4, which serves to hold the contact spring element 1 on a circuit board or the like. A bonding area 5 adjacent to the press-in area 4
There is. In the embodiment shown, the connection area 5 is represented by a winding pin 6, each winding pin 6 being able to be electrically connected by means of the so-called winding technique after the stamping strip 2 has been broken.

Two spring legs 8, 9 diverge from the connecting part 10. As can be seen in FIG. 2, the thickness D of the contact spring element 1 in the press-in region 4 and the coupling region 5 is approximately twice the thickness d of the contact spring region 3. One part of the leg branch joint part 10 has a thickness D, and the other part has a thickness d.

After a contact nug ring element 1 of the type shown in FIG. 1 has been made with a crown on the end of the spring leg (FIG. 2), the first spring leg 9 is left in place according to the invention. , and the second spring leg 8 is brought into the position shown in FIG. 3 by bending the flange obliquely, preferably at an angle of 27 degrees. This produces two sufficiently wide spring legs, which by diagonally bending the two spring legs are brought into the desired opposing position.

This will be explained in more detail with reference to FIGS. 1 to 7.

As shown in FIG. 2, the first spring leg 9 extends in the same plane as the membrane coupling part 10 and projects upwardly from the membrane coupling part 10. This also applies to the second spring leg 8 in FIG. 1, but after the modification according to the invention the second spring leg is no longer in its position, but in the position shown in FIG. become.

That is, the second spring leg 8 has a front side 88 and a rear side 9, the front side 88 of which faces the rear side 99 of the first spring leg 9. The first spring leg 9 also has a front side 98. That is, the front side 88 of the second spring leg 8 is arranged opposite the rear side 99 of the first spring leg 9.

It can be seen that the membrane binding portion 10 is divided into two regions by lines 13 and 19. The line 13 forms the upper defining line of the membrane binding part 10, and the line 19 is the boundary of the part of the membrane binding part 10 having a thickness D.

The membrane binding part 10 therefore has a flexible part 101 adjacent to the spring leg 8.9 and a non-flexible part 102 adjacent to the plenum region 4. Furthermore, the connecting portion 7 between the individual contact ring elements 1
are removed, resulting in the configuration of FIG. 3, leaving only the shoulders of each element 1, indicated by the reference numerals in FIG. 3, for pre-main use. As shown in FIG. 4, a diagonal transition is preferably provided between the press-in region 4 and the contact nupling region 3.

Immediately after stamping, the second spring leg 8 is under some more force than the first spring leg 9 (FIG. 1). Furthermore, the first spring leg 9 (FIG. 7) is formed by substantially vertically extending side edges 91,92.

The first spring leg 8 has one side edge 83 extending obliquely upward, and near its upper end, one side edge 84 is connected to a vertical side edge 84.
The other side edge 81 is formed such that it first extends obliquely upward and then straightens to become a vertical side edge 82.

As shown in FIG. 7, the first spring leg 8 and the membrane connection part 10 are provided with a shift zone 15, which brings the first spring leg 8 into the position shown in FIG. can be brought about. Bending line 16.1
7 defines a bending region 15. The first spring leg 8 is preferably bent in two steps along bend lines 16 and 17 to reach the position shown in FIGS. 3 and 4.

However, from the force, preferably a continuous force bending region can be provided between lines 16, 17 in passing from the configuration of FIG. 1 to the configuration of FIG.

It is also pointed out that the bending region 15 is provided only on the first spring leg 8.

Preferably, the first and second spring legs 9.8 have at their respective upper ends contact tabs 11, 12 in the form of crowns as shown in FIG. Furthermore, before the bending process according to the invention, the contact tabs 11, 12 are mated or opaque to each other. That is, contact tab 1
1 extends above the contact tab 12 (further to the left in FIG. 7), and the contact tab 12 extends below the contact tab 1 towards the spring leg 8. Preferably, a V-bulge (open cut) 14 is provided between the two nuzo ring legs 8, 9.

As previously mentioned, the spring legs 8 were slightly longer or taller before the bending process was carried out, but when bent according to the invention they are in the final position shown in FIG. In this case, both spring legs 8 and 9 are exerting almost the same force. Although FIGS. 1 to 7 show preferred embodiments of the invention, it is the diagonal bending of the second spring leg 8 that makes the invention possible; other variations are conceivable. I can do it.

For example, if the contact tabs 11, 12 overlap sufficiently, the degree of obliqueness of the bend can be further reduced, and the extreme force field table has a bend line 16, 17 as shown in FIG. force so that it can be set almost horizontally. However, the bending with oblique movement is possible even though the contact silling has a large spring leg width in the finished state (the spring leg width above the connecting part 10 is shown in FIGS. 1 and 3). (compare)) The required mechanics for contact scissoring offers the advantage of low forces.

As stated at the outset, the contact shilling design according to the invention has the advantage of making it possible to create a contact shilling with two spring legs and a center-to-center grid of, for example, 2.54 pus.

Even if the center-to-center distance is specified and difficult, the invention results in less material wastage.

It should be noted that, as clearly seen in Figure 3, the contact scissoring legs in the area of contours (11. It has the advantage of being able to be slightly widened.This widening allows for a defined spring position in the chamber and thereby an easy insertion of the contact tab that cooperates with the contact sealing ring. .

The contact spring according to the present invention has a connecting region such as a winding pin 6 and a prenuine region 4 therebetween.
It can be preferably formed as a one-piece design. However, a connecting member such as a winding pin (not shown and requiring special operations) can be welded or otherwise connected to the contact seal ring at the connecting part 10.

The contact spring or contact element 1 according to the invention is stamped from strip material to obtain the structure shown in FIG. It has a unique shape and strength.

If possible, stamping can be followed by a surface treatment operation to coat the contact areas of the contact tabs with gold.

The stamped contact element 1 is then deformed in the contact spring region 3 in the manner described above so as to obtain the position shown in FIGS. 3 and 4 relative to the ring leg 8.

[Brief explanation of the drawing]

FIG. 1 is a plan view of the one-piece contact silling element after stamping, FIG. 2 is a side view of the contact silling element of FIG. FIG. 4 is a side view of FIG. 3, FIG. 5 is a partial view taken from arrow A in FIG. 3, and FIG. 6 is taken along line B-- of FIG. 4. A sectional view taken along line B, and FIG. 7 is an enlarged view of the contact silling portion. DESCRIPTION OF SYMBOLS 1... Contact scissoring element, 3... Contact spring area, 4... Prenuin area, 5...
Bonding region, 8, 9... Spring leg, 10... Membrane bonding region, 15... Bending region. Fig, I Fig, 2 Fig, 3 Fig, 1

Claims (1)

[Claims] 1. A single contact spring particularly suitable for the Renuin technology and manufactured in large numbers from metal strips, comprising first and second opposed contact springs extending in one direction from the leg coupling portion. With spring legs and a pre-main area in the opposite direction from the leg coupling part, the first two-knolling legs (9) are substantially coplanar with the leg coupling part (10) and the second spring leg A contact scissor ring characterized in that the front side (88) of the leg (8) faces the rear side of the first spring leg (9). 2. With first and second oriented spring legs extending in one direction from the leg coupling part, the first spring leg (9) being substantially coplanar with the leg coupling part (10); Note that the second spring leg (8) is offset with respect to the first spring leg (9) such that its front side (88) faces the rear side (99) of the first spring leg (9). Features a contact spring. 3. A first spring leg (9), which can be manufactured in strip form and comprises first and second opposing spring legs extending in one direction from a leg coupling part with a coupling area; is left in substantially its stamped position, and the second spring leg (8) is bent into position opposite the first spring leg (9), preferably by a single diagonal bending operation. A contact spring that is characterized by: 4. characterized in that a bending region (15) is provided for obtaining a configuration in which the front side (88) of the second spring leg (8) faces the rear side (99) of the first spring leg (9); Contact shilling as described in any of the patents. 5. Contact spring according to claim 4, characterized in that the bending region is provided on the second spring leg (8). 6. The contact spring according to claim 4, wherein the bending region is provided at the leg connecting part (10). 7. Said bending region (15) is a second spring leg (8)
5. The contact spring according to claim 4, wherein the contact spring is provided in the leg connecting portion (10) (FIG. 7). 8. In the area of the contact spring or contact spring legs, the thickness of the material is equal to the press-in area (4)
and the contact spring according to any of the patents, characterized in that the thickness of the coupling region (5) is smaller than D). 9. The first spring leg (9) is parallel to the 4 side edges (9).
1.92) and the second spring leg (8
) has a substantially straight side edge (83), and the opposite side edge (8], 82) extends towards or adjacent to the bending region ( ]5) a second spring leg ( 8) The contact spring according to claim 1, wherein the contact spring is formed to be wide. 10. Contact spring according to any of the preceding claims, characterized in that contact tabs (11.12) are formed at the free ends of the spring legs (8, 9). 11. Contact spring according to any of the preceding claims, characterized in that the second spring leg (8) is bent in a two-speed diagonal along the bending line (16, 17). 12. A contact spring according to any of the preceding claims, characterized in that in the bending region there is a continuous fishing force transition from the curvature at the bending line (16) K to the curvature at the bending line (17). 13. If the contact tabs (11.12) overlap sufficiently, the degree of oblique bending can be reduced, and in the case of extreme 9s, the bending line (16. 17) is set almost horizontally. A contact spring according to any one of the preceding claims, characterized in that the contact spring is adapted to be able to. 14. Contact element according to any of the preceding claims, having a connecting region (5) and a contact spring connected thereto. 15. Contact element according to any of the preceding claims, characterized in that the coupling area is a winding bin (6). 16. Contact element according to any of the preceding claims, characterized in that a press-in area (4) is provided between the winding pin (6) and the contact spring. 17. The contact legs joined by the connecting part (10) are stamped with a material strip, and in the next operation the second contact leg (8) is bent behind the first contact leg (9). on the rear side (99) of the first contact leg (9)
) is faced to the front side (88) of the first contact leg (8).