FR2578688A3 - DEVICE FOR CONNECTING A FLEXIBLE CONDUCTOR SHEET - Google Patents

Abstract

IN A CONNECTION DEVICE OF A FLEXIBLE SHEET OF CONDUCTORS, THE CONNECTION SURFACES 4 OF THE CONDUCTIVE PATHS 2, ATTACHED TO THE CONTACT PARTS 7, MUST ALSO BE LASTINGLY PROTECTED AGAINST CHEMICAL AND PHYSICAL DAMAGE. TO THIS END, AN INSULATING LAYER 5 COVERS THE CONDUCTIVE PATHS 2, THE CONNECTION SURFACES 4 AND THE INTERMEDIATE REGIONS 6. THE INSULATION LAYER 5 AND THE CONNECTION SURFACE 4 TIGHTLY SURROUND THE STUDS 11 OF THE CONTACT PART 7, WHICH PASS THROUGH.

Description

The invention relates to a connection device

  of a flexible conductor sheet whose paths

  conductors are covered with an elastic insulating layer, connection surfaces being formed at the edge of the conductor sheet at the end of conductive paths

  and being covered with a protective layer and cram-

  pons, formed on a support part of a piece of con-

  tact, piercing the conductive layer, the connection surfaces

  dement and the sheet and now the support part against

the protective layer.

  A connection device of this kind is

  known. The conductor paths are covered, for the pro-

  tection, of an insulating layer. This ends before the connection surfaces, since, moreover, the support parts cannot come into contact with the connection surfaces. To protect the conductive silver from the connection surfaces, the

  connection are covered with a protective layer

  conductive, for example a layer of graphite. Such a conductive protective layer must not bridge connection surfaces located side by side. It must therefore be provided individually over each connection surface.

  The graphite coating of the connection surfaces

  dement does not constitute protection against damage

  mechanics of conductive journeys in the sur-

  connection faces. The graphite coating cannot

  no longer prevent migration of conductive money.

  For the protection of the connection device, it would be possible, after fitting the contact parts, to cover the conductor sheet with an insulating layer which also extends over the support parts. However, this would be disadvantageous since, then, the conductor sheet is not protected before or during the positioning of the contact parts. In addition, the mass of insulating layer could arrive between the places of contact, this

  which can lead to contact disturbances.

  The problem of the invention is to indicate a connection device of the species indicated at the beginning J

  in which the connecting surfaces are also pro-

  permanently protected against chemical and physical damage without compromising the contact between the contact parts and the connection surfaces.

  According to the invention, the above problem is re-

  solu by the fact that the protective layer is formed by the insulating layer and that the insulating layer also covers the sheet between the connection surfaces and that the insulating layer and the connection surface surround

  tightly the studs which pierce.

  The insulating layer covers everything here

  of the conductor sheet, i.e. the conductive paths

  the connection surfaces and the regions between them. This insulating layer must be applied in a single operation. Separate covering of the connection surfaces is unnecessary. The insulating layer protects

  conductive journeys against chemical and physical damage

  ques. It prevents migration of money and prevents

  scratching of conductive paths and connection surfaces

  even before the contact parts are installed.

  The insulating layer also prevents corrosion of the contact points between the connection surfaces and the contact parts, since the contact points are in the regions of the studs which are enclosed by the contact surface.

  connection and that they are covered by the insulating layer

you.

  Advantageous arrangements of the invention appear

  will appear in the following description which refers to

  drawings in which: Figure 1 is an enlarged partial plan view

  a device for connecting a conductive sheet

  teurs, and Figure 2 is a sectional view along the line

II-II of Figure 1.

  On a flexible conductor sheet 1 are im-

  award winning 2 driver journeys in silver. At the edge 3 of the conductor sheet 1 is formed, at the end of a

  conductor path 2, a connection surface 4. This

  this, as well as the driver 2 path - and with it -

  is formed by printing conductive silver.

  On the sheet 1 is applied an insulating varnish which forms an elastic insulating layer 5. The insulating layer 5 extends everywhere over the conductive paths 2, the connection surfaces 4 and the regions 6 of the

  sheet 1 which lie between these.

  In the region of each connection surface 4, a metallic contact piece 7 is fixed to the conductor sheet 1. This piece has a support part 8 and an insertion part 9. The width B of the piece of

  contact 7 is about the order of magnitude of 2 mm.

  On the support part 8 are provided two openings

  pes 10 which each form, at their edges, four studs 11. The studs 11 end at a point. They pierce the insulating layer 5, the connection surface 4 and the sheet of conductors 1. On their side opposite the insulating layer, they are bent. As a result, the contact piece is firmly retained by its support part 8 against the sheet 1. The support part 8 bears firmly against the layer

  insulating elastic 5. No electrical contact occurs

  stick between the support part 8 itself and the surface of

connection 4.

  The insulating layer 5 surrounds the studs 11 in a sealed manner. Similarly, the connection surface 4 surrounds

  the studs 11 tightly. By circumferential contact

  of the connection surface 4 with the studs 11, the necessary contact places 12 are created. The

  contact points 12 are covered, vis-à-vis the

  environment, on the one hand, by the insulating layer 5 and, on the other hand, by the sheet of conductors:.: This is favored by

the conical shape of the studs 11.

  After the application and drying of the insulating layer 5, the conductive paths 2 and the surfaces of

  connection 4 are immediately protected against

  chemical and mechanical fluences. It is therefore avoided that there is already damage to the conductive paths 2 and to the

  connection surfaces 4 when fixing the connection parts

tact 7.

  For fixing the contact parts 7, press

  se the supporting parts 8 on the insulating layer 5. The studs 11 pierce the insulating layer 5, the connection surface 4 in question and the sheet of conductors 1. The ends of the studs 11 are bent which then exceed the conductor sheet 1. During and after the

  drilling, the connection surface 4 and the iso- layer

  lante 5 are placed right against the studs 11, so that, on the one hand, a secure electrical contact is obtained and

  that, on the other hand, there are no perforations or-

  green. Surprisingly, it appeared that the places

  contact 12 give a secure contact.

Claims (3)

-R E V E N D I C A T I ON S-   1. Device for connecting a sheet of   flexible conductors with conductive paths   covered with an elastic insulating layer, connecting surfaces being formed at the edge of the sheet   conductors at the end of conductive paths and being re-   covered with a protective layer and crampons,   killed on a support part of a contact piece, piercing the conductive layer, the connection surfaces and the sheet and holding the support part against the layer   protective, device characterized in that the protective layer   cover is formed by the insulating layer (5), in that the insulating layer (5) also covers the sheet (1) between the connecting surfaces (4), and in that the insulating layer (5) and the surface of connection (4) surround with   sealingly the studs (11) which pierce.   2. Device according to claim 1, character-   in that the support part (8) is applied against the insulating layer (5).   3. Device according to any one of the claims.   cations 1 and 2, characterized in that the studs (11) are end conically.