DE7220915U - CONTACT DISC FOR VEHICLE ANTENNA - Google Patents

Description

DR. RUDOLF BAUER · DIPU-ING. HELMUT HUBBUCH PATENT LAWYERS T

753 PFORZHEIM.

WESTERN 3J (AM LEO »jLDPLAT» TEL (O7 231) 24290

April 28, 1972 I / K

Pirma Wilhelm Sun Jr. EG, 7532 iJ i e f e r η

Contact disc for vehicle antenna.

The innovation concerns a disc for the Ilasse connection a vehicle antenna with di.r body.

In the case of antennas that are fastened in the opening of a vehicle body are, the task is, at the same time with the mechanical fastening, a proper electrical connection with low Establish contact resistance between the parts of the antenna carrying ground potential and the body and ääfür to ensure that these electrical properties are retained over a long period of time.

It is known that the contact with the fastening at the same time to produce and thereby simplify that a contact part radially in the production of the hole in the body resulting metallic bright, ring-shaped zone of this body

72209153011.72

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breakthrough is pressed. It is such a bftkesnt * and to prevent rust at this point by introducing grease into the contact area. For this purpose it is also known a suitable ring, for example made of felt, foam or metal mesh, soaked in grease that "is squeezed out of this ring when the connecting nut is tightened ·

These known designs of grease rings have the disadvantage that they smear your fingers with grease * when you touch them, and the desired cleanliness when working on the body affect. You have the even more serious »disadvantage, that the leakage of the fat from the shim ring is completely uncontrolled is. So it happened that the fat was forced outwards instead of into the place for which it was intended.

The innovation eliminates this handicap by training a Contact disk, which is explained with reference to the drawing, which schematically and partially in section, an embodiment shows.

Fig. 1 is a section through the contact disk and

Fig. 2 is a section through the attachment of an antenna base on a body before the final tightening of the fastening nuts.

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• · · 111 '■ 111 I)

The contact disk consists of a stiff metal log 2 with a continuous neck 3> the spherical zone (4) is embossed, at the same time at the base of the neck at least three small teeth (5) are embossed to the outside.

A thin-walled disc 6 made of soft metal is crimped around the edge of the metal disc 2 so that an annular Cavity 7 and an annular opening 8 result. The cavity 7 is filled with fat

The fat is brought into the cavity by the contact washer is immersed in the liquefied fat. All excess grease runs off when the contact disc is removed while the \ located in the cavity 7 solidifies there. If necessary, the contact disc can be wiped from the outside, making it completely clean.

To attach the antenna base in the opening in the body, the contact disc (2,3,6,7) with the neck 3 from below into the Drill hole introduced into the body. The ball set 10 of the antenna base lies in the spherical zone 4 of the neck 3 and canoe in this be pivoted in a certain angular range. At the top of the body there is a bowl-shaped one Disk 11 made of elastic plastic, above a spherical cap 12 and a metal shell 13, flowie the nut 14 attached to a Attacks the thread attachment of the antenna base.

15 is the contact for the removable one, not in the drawing the antenna rod shown and 16 the cable connection of the antenna «

u'ig. 2 shows the state when assembling the fastening element Bg represents, with the mother 14 let only slightly attached. When the hatch 14 is tightened, the neck 3 becomes the contact billet ia the metallic blank inner ring surface of the checked sheet 9 drawn, the prongs 5 also cut into the body panel 9 and in this case both a contact improvement, as also provide anti-rotation protection.

The thin plate 6 of the contact disc is pressed under the Spaaakraft the cutter against the tletallscheibe 2, 'whereby the fat from the chamber 7 By J ¹ - is squeezed ien annular gap 8 in the bore of the Karosserieblechep 9 where it coats the metallically bright annular surface. Due to the design of the contact disk in accordance with the innovation, this can become fat. not leak anywhere else. This also ensures a coherent grease coating on the entire contact surface.

Claims (2)

DR. RUDOLF BAUER · DIFL.-ING. HELMUT HUBBUCH * 2 PATENT LAWYERS 753PFORZHEI1M. WESTlJCHE 31 CAM LfOPOLOPLATZ) TEL. (O7Z31J2429O May 2, 1972 ι / κ Claim for protection; Contact disk for the attachment of vehicle antennas to the body with contact on the bare metal ring surface of the neck opening, characterized by a grease-filled storage space (7) between a rigid disk part (2) with a neck that penetrates the body opening and an easily deformable neck attached to it by flanging Washer (6) with a fiing gap (8) in the area of the passage through the body, which is used to allow grease to escape under pressure. 722091530.11.72