JPS581513B2 - solder terminal - Google Patents

Description

[Detailed Description of the Invention] The present invention provides a soldered terminal clip for attaching to a connection pad of a substrate.
erbearing terminal clip)
Regarding.

The solder is mechanically engaged with the clip at the location where it is welded to join the clip to the connection pad.

When a clip is placed on a connecting pad (usually a metal surface of a base that is introduced into the clip's occlusion) and the assembly is heated, the molten solder will, upon cooling, bond to the solder between the clip and the pad. Various means have been proposed for encasing the adjacent surfaces of the clip and pad to form a bonded metallurgical bond.

This conventional type of clip is known from Cox et al., U.S. Pat. Landman (La
U.S. Pat. No. 3,750,252 to M. ndman) and in which individual solder clumps extend across one or both arms to the adjacent connecting surface...a clip on the side opposite the connecting surface with a droplet of solder. It is shown in U.S. Pat. No. 4,019,803 to Schell, which is characterized in that it is soldered to the arm.

It is an object of the present invention to provide a means for securely attaching a solder mass to a terminal clip solely by mechanical means.

Another object of the invention is to provide soldering clips in which each clip has its own supply of solder in place for welding to form a bond with a pad.

Another object of the present invention is to provide a solder and clip assembly that can be made by very simple and efficient stamping steps.

Still another object of the present invention is to provide reliable improvements in the shape, structure, and combination of parts, thereby effectively achieving the above and other objects.

Practical embodiments of the present invention will be described with reference to the drawings.

With reference to the drawings, and with particular reference to FIGS. 1-4,
Solder terminal strip
strip) comprises a continuous support strip 11.

Each interlock clip has a strip 1 attached to it by legs 13.
1.

The support strip is provided with guide holes 14 at regular intervals, as is customary.

Each clip has a flat body portion 15 bent to extend upwardly and laterally from the planar end of the clip body portion and laterally at a location spaced apart from and substantially parallel to fingers 16. Medial digitorum 17 that extends to
A pair of barbed fingers 16 are provided which are spaced apart by zero width and define a gap 21 adapted to receive the ends of a substrate (not shown).

Fingers 16 and 17 are formed from a material as shown in FIG. 4 with parallel cuts 18 terminating in distal portion 18'.

An additional gripping finger 19 is provided by a U-shaped cut 20 whose sides are parallel to the cut 18 and whose closed end 20' is below the line of the distal end 18'; ,
It is thus partially formed from the members in the central finger 17.

The free ends of the fingers 17 are arched away from the fingers 16 and the gripping fingers 19 are shaped like short cylindrical nodules, as clearly shown in FIGS. 1, 2 and 3. solder 22
The finger 17 is arched towards the curved end in such a position that it firmly grips the finger 17 .

Such a terminal clip, or rows of such terminal clips, may include one or several contact pads in a reversed orientation as shown.
At the end of the base having a pad (t pad), fingers 17 are adapted to lock onto the pad, and when heated to melt the solder, it flows into the turns of fingers 17 and 19. The clip is then firmly coupled to the base with a good electrical connection.

In this clip and each clip described below, the solder is retained on the side of the gap closer to the body.

5-8, a flat body 25, a pair of striated fingers 26 (similar to fingers 16) and a central striated finger 27 (similar to fingers 17) are shown. ), the fingers being formed from the material shown in FIG. 7 by means of parallel cuts 28.

At a central location below the end of the cutting section 28, the body is provided with an aperture 29 and a cylindrical nodule of solder 30 is inserted onto a slightly recessed anvil face or similar feature. a punch having a suitably shaped tapered end (e.g. a conical end) adapted to force a portion of the solder member through the aperture so that the tip collapses into the contour shown at 31 in FIG. The screws are then riveted into the openings.

The terminal clip or row of terminal clips in this variant has a base end with one or several connection pads, receiving the base end in the gap between the fingers 26 and 27 and receiving the base end in the gap between the fingers 26 and 27. 27 is fitted in a locking configuration to the pad at the base end, and when heated to melt the solder 30, the solder flows into the grooves of both fingers 26 and 27 and makes a good electrical connection. This firmly connects the clip to the base.

A second modification of the clip shown in FIGS. 9-12 has a central striated finger formed by a main body portion 35, a pair of striated fingers 36, and a parallel cut portion 38 in the material shown in FIG. portion 37 (similar to fingers 26 and 27, respectively).

).

Near the lower end of the cut section, the main body has a notch 4 at each end.
0 is provided and a strip of solder 41 is provided at the 9th and 12th
As shown, it is tightly wound around the swivel of the body portion at a location that can be accommodated at least partially within the cutout.

The deformation and inelastic properties of lead solder are such that the strip 41 connects the fingers 36 and/or the base pad to the base pad.
This is because it remains in place until it is melted to join 37 and introduced between the fingers.

The strip of solder should be sufficient to wrap at least one end of the base portion within each notch, and may completely surround the base portion as shown.

The application of the terminal clip or row of terminal clips to the connection pads of the base in this variant is substantially similar to that described in the first variant above, between the fingers 36 and 37 at the base end. The solder 41 is heated and melted and flows into the grooves of the fingers 36 and 37, thereby securing the terminal clip and the base with a good electrical connection. This is accomplished by combining.

A third variant of the clip, as shown in FIGS. 13-15, comprises a main body portion 45, a pair of striated finger portions 46 and a central striated finger portion 47, the latter finger having a narrow extension. Part 4
It has 8.

When fingers 46 and 47 are bent into their corresponding positions in fingers 16 and 17, for example to define gap 51 (similar to gap 21), extension 48 has a short cylindrical shape. It can be bent into an arcuate shape to enclose the solder blob 52 (similar to solder 22) and cooperate with the fingers 47.

To form the fingers 47 and the extensions 48, the material is shaped as shown in FIG. Cut at 490 points, these pads enhance the clip's strength, stability, and conductive properties.

In each of the above-described examples of clips, the solder blobs, in rod-like or strip-like configuration, are attached to the clip fingers in such a position that they are melted for the formation of a bond between the fingers and the terminal pad or the like. to create a firm mechanical connection with the part or body part.

Each clip can also be made with a simple die cutting and assembly process with minimal wastage of parts.

[Brief explanation of the drawing]

1 is a front view showing a pair of clips on the support strip; FIG. 2 is a side view of the clip shown in FIG. 1; FIG. 3 is a partially enlarged perspective view showing the clip fingers; FIG. ~3
5 is a front view showing a first variant of the clip; FIG. 6 is a side view of the clip shown in FIG. 5; FIG.
The figure is a plan view showing the material stamped to make the clip according to figures 5 and 6, figure 8 is a partial sectional view taken along the line 1 - 1 in figure 5, and figure 9 is a second modification of the clip. Figure 10 is a side view of the clip shown in Figure 9; Figure 11 is a section showing the material stamped to make the clips of Figures 9 and 10; A plan view, FIG. 12 is a cross-sectional view taken along line 1 in FIG. 9, FIG. 13 is a side view showing the head of the third modified example of the clip, and FIG. , FIG. 15 is a plan view showing the blank as stamped to make the clip according to FIGS. 13 and 14. 12...Terminal clip, 15, 25, 35, 45...
・Main body part, 16, 26, 36, 46... (separated) finger part, 17, 27, 37, 47... (center) finger part,
19... (additional) fingers, 22, 30, 41, 52
...Solder, 29...Opening part, 40...Notch part,
48...extension part.

Claims (1)

Claims: 1. a clip body, a plurality of connecting fingers projecting from an end of the body and bent to define a gap adapted to receive a base end; and means for retaining a lump of solder on the side of the clip body adjacent to the clip body. A terminal clip that attaches to the connection pad on the base. 2. The fingers include a pair of laterally spaced fingers disposed at a distal portion of the clip and a central finger having a width substantially corresponding to the spacing between the spaced apart fingers. The terminal clip according to claim 1, characterized in that: 3. The solder retaining means includes an additional finger which is partially die-cut from the central finger and is bent into the central finger in a position so as to grip the solder therebetween. The terminal clip according to claim 1, characterized in that the terminal clip includes a portion. 4. The terminal clip according to claim 3, wherein the solder is in the form of a small cylindrical lump. 5. The terminal clip according to claim 1, wherein the front body portion has a hole in the vicinity of the base of the finger portion, and the solder is riveted into the hole. 6. The terminal clip according to claim 2, wherein the main body portion has a hole in the vicinity of the base of the finger portion, and the solder is riveted into the hole. 7. The device according to claim 1, wherein the body portion is provided with a cut-out portion at the end near the base of the finger-like portion, and the solder is mechanically engaged with the cut-out portion. terminal clip. 8. The device according to claim 2, wherein the body portion is provided with a cut-off portion at the end near the base of the finger-like portion, and the solder is mechanically engaged with the cut-off portion. terminal clip. 9. The terminal clip according to claim 7, wherein the solder is in a band-like shape having a length sufficient to wrap at least a turn at the end of the base portion within each of the notches. . 10. The terminal clip of claim 9, wherein said solder strip substantially completely surrounds said base portion. 11. A terminal clip according to claim 2, characterized in that the central finger has an extension at the end thereof, the extension being bent around the solder mass. 12. The terminal clip of claim 11, wherein the extensions are narrower than the central fingers and the spaced apart fingers include wide pads proximate the free ends.