Locking element for locking of a panel cover on a module rail

1. A locking element configured for locking of a panel cover on a module rail, the locking element comprising:

a bearing block with a mounting surface and having fasteners configured for mounting on the inside of the panel cover;

a slide lock movably mounted on the bearing block and having a locking tab;

an actuating screw passing through the slide lock, the actuating screw being actuable in the installed locking element, the actuating screw configured to be accessible through a hole in the panel cover; and

a slide nut screwed onto the lower end of the actuating screw;

wherein, turning the actuating screw causes the slide nut to engage and move the slide lock from a locked position in which the locking tab is configured to engage beneath the module rail to a release position, and vice versa.

2. The locking element of claim 1 , further comprising threaded holes disposed in the mounting surface of the bearing block adapted to receive fastening screws.

3. The locking element of claim 2 , wherein the threaded holes have countersinks.

4. The locking element of claim 1 , wherein:

the actuating screw is configured to rotate in the bearing block around a rotational axis perpendicular to the mounting surface; and

an oblique sliding surface is arranged on the slide lock, on which the slide nut slides so that tightening of the actuating screw relative to the slide nut produces movement of the slide lock transverse to the rotational axis of the actuating screw.

5. The locking element of claim 4 , wherein:

the slide nut has two wedge surfaces oriented at an oblique angle to the rotational axis of the actuating screw;

the slide lock has two corresponding sliding surfaces which extend parallel to the wedge surfaces and on which the wedge surfaces slide so that during tightening of the actuating screw the slide lock is forced in one direction and during loosening of the actuating screw the slide lock is forced in the opposite direction.

6. The locking element of claim 4 , wherein the slide lock is locked by the completely tightened actuating screw in the locked position.

7. The locking element of claim 4 , wherein the head of the actuating screw is closed off flush with the mounting surface of bearing block.

8. The locking element of claim 4 , wherein the head of the actuating screw has an actuator for a screwdriver.

9. The locking element of claim 4 , further comprising a stop on the slide lock, the stop traveling against the actuating screw before it is loosened entirely from the slide nut.

10. The locking element of claim 4 , wherein the actuating screw sits in an elongated hole of the slide lock.

11. A housing to accommodate electronic components, comprising:

front and rear module rails;

at least one panel cover with holes arranged in a grid pattern and having a flanging which engages in a groove of a module rail; and

at least one locking element according to claim 1 fastened on the inside of the panel cover so that the locking tab engages beneath the module rail in the locked position.

12. The housing of claim 11 , further comprising threaded holes disposed in the mounting service of the bearing block adapted to receive fastening screws, wherein the threaded holes are arranged in the mounting surface of the bearing block of the hole pattern in the panel cover.

13. The housing of claim 12 , wherein the threaded holes have countersinks, wherein the rotational axis of the actuating screw is concentric to a hole of the panel cover.

14. The housing of claim 13 , wherein the head of the actuating screw has a larger diameter than the corresponding hole in the panel cover.

15. The housing of claim 12 , further comprising positioning pins formed on the mounting surface of the bearing block, the positioning pins engaging in the holes of the panel cover.