DE7011611U - FORK-SHAPED CONTACT SPRING. - Google Patents

Description

H 2069

H. Grende - 3

W. WOODS ft CO. KG, 7758 Meersburg / Bodensee

Fork-shaped contact spring

The innovation concerns a fork-shaped contact spring, especially for printed circuit boards, for viewing to electrical conductors and with Eontaktfingern made of double material thickness, which through A substantially symmetrical stamped part is put together.

Fork-shaped contact springs whose material thickness is achieved by putting together essentially symmetrical ones Stamped parts are known. For example, in the DT-Gbm 1 998 543 a contact spring strip is used suggested that the individual Eontaktfedern in one piece from one of the two respective Eontaktelemente in a mirror-inverted arrangement representing single metal part, in particular Stamped part, are produced along the plane of symmetry reflecting the contact elements

PT-Bri / Oe

March 26, 1970 - 2 -

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is folded up. A disadvantage of the individual contact springs of the spring strip is that the two resilient arms, which generate the contact-making spring pressure, each consist of two individual parts. There are already other contact springs known, which are made from a single stamped part will. The parts placed one on top of the other during the manufacturing process, however, adjust the following manufacturing steps back up and repel at the manufacturing facilities, so that

the entire spring can break off from the strip-shaped starting material. Furthermore, these are known Contact springs have the disadvantage that they - used as individual contacts - as soon as they are on a conductor plate are attached, tend to tilt, since they are practically only punctiform on the conductor tracks rest.

It is the task of the innovation to create a fork-shaped contact spring that can be used in Contact housings, e.g. of contact strips, are suitable, light and with as little production scrap as possible can be produced and also has great stability; the contact spring should be able to do this be able to carry large currents, such as those switched in electrical household appliances. Farther the contact spring should be constructed so that it - used as a single spring - securely sits on a circuit board and cannot tilt. Cables should be attached to the contact spring with the help of

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a simple crimp connection can be attached both electrically and mechanically. According to the innovation, the mentioned objects are achieved in that each of the opposite or side by side CLs Contact fingers in the opposite direction of rotation by 90 ° around their longitudinal axis with respect to the Flat material are bent.

After a training the innovation will be two s independent contact parts that are part of the symmetrical The punched part is held together by a tongue in the folded state.

According to a further embodiment of the innovation, the tongue also serves to lock the contact spring in a housing, e.g. a connector block.

According to an expedient embodiment of the innovation, the tongue is provided with lugs on one contact part are attached, prevented from bending back.

Eil.3 further development of the innovation provides that the fastening tab for the cable is attached in the plug-in direction.

According to another development of the innovation, the fastening tab closes with the plug-in direction Angle.

The innovation points towards known Eontakt springs

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various advantages. By merging two, belonging to a single stamped part, Independent contact parts and by twisting the contact fingers result in four support points on the circuit board. This ensures a very secure fit, so that any tilting of the Contact spring is excluded. After the punched part has been cut free and the two contact parts is achieved by correspondingly bending a tongue that the two Contact parts placed on top of each other cannot be removed from each other again. This is reliable avoided that no parts of the contact spring are essential in the following manufacturing processes ü'o protrude beyond the plane determined by the bending and be able to attach to the production facilities. Furthermore, it is an advantage of the innovation, that the holding together tongue also acts as a lock for the contact spring In a contact housing is used.

The innovation is based on an exemplary embodiment explained with the help of a drawing. In the drawing show:

Fig. 1 is a plan view of the stamped part, Fig. 2 is a plan view of the stamped part

during the blanking from a strip-shaped starting material,

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Pig, 3 a ready-made, ^1- shaped contact spring, in a perspective view.

From Pig. 1 shows that a stamped part is used to produce the fork-shaped Eontakt spring according to the invention, which - if one disregards a tab 6 - consists essentially of two independent Eontakt parts 10, 11 which together form an almost symmetrical stamped part. One contact part is additionally provided with a tongue 8 and the front contact part with extensions 9. In the next production step, both contact parts are folded together on a bending line 5 to form a single contact spring. The second contact part 10 * could also be attached to the first contact part 11 in such a way that it can be placed on the contact part 11 ^{at a bending line 5 1.}

As soon as, for example, the two contact parts 11 and 10 are placed on top of one another, a tongue 8 is bent over so that that it holds the contact part 10 on the contact part 11 and can no longer go back. To the Securing the tongue 8 lugs 9 can be provided on the second contact part 10, between which a space remains free which is smaller than the width of the tongue 8. As soon as the tongue 8 is the contact part 10 on the contact part 11 holds, can

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Approaches 9 to be bent again in the direction of the plane given by the glass material, until they hit tongue 8. From now on the tongue 8 is clearly fixed.

Before the two contact parts 10 and 11 are placed on top of one another, the contact fingers 1, 2, 3 and 4 bent by 90 ° about its longitudinal axis in such a way that each Eontaktteile folded together opposite or adjacent Eontaktfinger are bent in opposite directions of rotation. This results in a wide area for both sides of a flat contact, e.g. a printed circuit board Support surfaces (Fig. 3).

The free end of the tongue 8 (Fig. 3) is bent out of the plane determined by the flat material and thereby serves as a locking mechanism for those inserted into a contact housing, e.g. a socket strip Contact spring. The contact spring is thereby protected against falling out of the contact housing.

The tab 6 (FIG. 1) attached to the essentially symmetrical stamped part is used in a manner known per se Way of electrical and mechanical fastening of cables. As can be seen from Fig. 2, the tab 6 can also be attached to the symmetrical stamped part in the plugging direction. Of course is in all embodiments of the tab 6 part of the stamped part. In Fig. 2 is

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It also shows how the stamped parts are made from a [Flat starting material 7 can be punched out

can. Of course, it would also be possible that the stamped parts shown in FIG Layer rotated by about 90 ° on the strip-shaped starting material take in.

6 claims for protection

1 sheet of drawings with 3 figures

Claims (6)

1 · 2069 protection claims 1. Fork-shaped Eontaktfeder, in particular for printed circuit boards, to Anquet see on electrical conductors and with Zontaktfingern made of twice the material thickness, which is created by putting together a substantially symmetrical stamped part, characterized in that each opposite or adjacent Eontaktfinger (1, 2, 3, 4 ) are bent in the opposite direction of rotation by 90 ° around their longitudinal axis with respect to the flat material (7). 2. The bifurcated Eontaktfeder according to claim 1, characterized in that two be independent per se Eontaktteile (10, 11), dis are part of the symmetrical stamped part, held together in folded condition by a tongue (8). 3. Fork-shaped Eontaktfeder according to claim 1 and 2, characterized in that the tongue (8) is used at the same time to lock the Eontaktfeder in a housing, for example a plug block. 4. Fork-shaped Eontaktfeder according to claim 2 or 3, characterized geke ^ yizelc ^^ ett that the tongue (8) by lugs (9) which are attached to the one Eontaktteil (10, 10 * - Fig. 1), on bending back Gehindeä are. PT-ßri / Oe March 26, 1970 - 2 - H 2069 - 2 - 5. Fork-shaped contact spring according to one of the
Claims 2 to 4i dadwrch geke *** ^{1 ψ} · eic ^ ** ¹ et.
that the fastening tab (6) for the cable is attached in the plug-in direction. 6. Fork-shaped contact spring according to one of claims 2 to 4 » characterized. that the fastening tab (6) forms an angle with the direction of insertion.