Patent EA-000360-B1 (EA)
Title: A case for electrical switchgear
Inventor: LOIDICE ROBERT
IPC: H01R13/506
Filed: 1998-02-13
Abstract: 1. A case for electrical switchgear comprising: - a first half shell (1) comprising a first side wall (3) and first circumferential walls (4) arranged appreciably perpendicularly to the edge of the first side wall, - a second half shell (2) comprising a second side wall (5) and second circumferential walls (6) arranged appreciably perpendicularly to the edge of the second side wall, and - means for securing the first and second half shells face to face, the first and second circumferential walls being in contact. a case characterized in that the means for securing comprise at least one junction block (10, 11) arranged on an external part of the case to join an external face of the first side wall (3) to an external face of the second side wall (5), said junction block comprising a first part (12) arranged outside the circumferential walls and two securing walls (13, 14) perpendicular to said first part and arranged on the external faces of the first and second side walls. 2. The case according to Claim 1 characterized in that the securing walls of the junction block comprise first latching means (15, 16) cooperating with suitable forms (17) of the side walls to fix said junction block onto the case. 3. The case according to Claim 2 characterized in that the first latching means of the securing walls of the junction block are tabs (15) comprising latching splines (16) designed to cooperate with notches (17) situated in the side walls of the case. 4. The case according to Claim 2 or 3 characterized in that the first and second side walls comprise projections (18) comprising second latching means (19) to fix said side walls onto the first part of the junction block. 5. The case according to any one of the Claims 1 to 4 characterized in that the half shells comprise third latching means (22a-22d, 23a-23d, 24a-24d) arranged on the internal faces of the walls to hold the half shells in their respective positions. 6. The case according to Claim 5 characterized in that the third latching means comprise flexible tabs (22a-22d) provided with latching splines (23a-23d) at their ends and arranged in the extension of circumferential walls, and notches (24a-24d) situated in circumferential walls opposite the tabs to receive the latching splines. 7. The case according to one of the Claims 5 or 6 characterized in that the third latching means comprise at least three points for fixing to the circumferential walls, a first fixing point (22c, 22d, 23c, 23d, 24c, 24d) being situated towards the back plate of the case, a second fixing point (22b, 23b, 24b) being situated towards an up-line side of the case, and a third fixing point (22a, 23a, 24a) being situated towards a down-line side of the case. 8. The case according to any one of the Claims 5 to 7 characterized in that the third latching means are arranged in a manner hardly accessible from the outside of the walls to prevent the case from being opened without the half shells being deformed. 9. The case according to any one of the Claims 1 to 8 characterized in that it comprises a cover (21) forming the front face of said case and fixed by means for fixing by latching onto walls of the half shells, said means for fixing by latching not being able to be plied with from the outside of the case, and the circumferential walls having an opening situated towards the front face of the case 10. The case according to any one of the Claims 1 to 9 characterized in that the junction block comprises recesses designed to receive means for electrical connection (26) cooperating with conductors (27) arranged between the inside and the outside of the case. 11. The case according to Claim 10 characterized in that the junction block comprises means for dielectric separation (29) comprising an edge (30) so as to increase an isolation distance between two terminals (26) of the means for electrical connection, the dielectric separations being in contact with the circumferential walls of the case. 12. An electrical switchgear apparatus characterized in that it comprises a case according to any one of the Claims 1 to 11, an electrical circuit (25) arranged inside said case, and electrical conductors (27) connected to said circuit and passing through the circumferential walls to cooperate with terminals of the means for electrical connection of a junction block 13. The electrical switchgear apparatus according to Claim 12 characterized in that the electrical conductors (27) are made of preformed flat copper connected to a printed circuit (25) arranged in the case, the form of the conductors having a first part (31) connected perpendicularly to the plane of the printed circuit, a second part (32) folded with respect to the first part and a third part (33) extending outside the circumferential wall. 14. The electrical switchgear apparatus according to Claim 13 characterized in that the first part of the conductors comprises two ends able to be connected to the circuit, the second part of the connector being closer to a first end to make the connecting conductor reversible.