DE7239547U - Lock for locking block screws - Google Patents

Description

"Security for locking block screws"

The innovation relates to a fuse for locking block screws of eyeglass frames, whereby the screw seat is surrounded by a thin-walled pipe socket, which acts as a plastically deformable securing part is engageable with the truncated pyramidal head of the locking block screw.

It is known for securing locking block screws, for example from DBGm 1.851.813, ^{to surround the seat for the square head of the screw located on a locking block N} .eil with a pipe socket, which is used to secure the screw with the help of pliers from two sides is pressed to the head. This operation requires the presence of special pliers, as well as an undesirable change of tools after tightening the screw.

The task of the innovation is to secure locking block screws to create, in which the bending of the pipe socket on the screw head without using a special tool can be carried out.

This object is achieved according to the innovation in that a gap is provided between this pipe socket and a fixed part of the closing block or the socket is, the width of which corresponds approximately to the thickness of the screwdriver assigned to the locking block screw.

Said pipe socket can be non-cutting or cutting on the closing block part forming the screw seat be molded.

In the case of the new security, after tightening the locking block screw, a screwdriver is inserted into the Space between the pipe socket and a fixed part of the closing block or preferably the outer contour of the adjacent glass ring is inserted and an area of the pipe socket is opened by swiveling the screwdriver bent towards the frusto-pyramidal head of the lock block screw. Through the formschtissige Installation of the bend of the pipe socket on a flat of the screw head, it is secured against rotation. The iadig-Iich the screwdriver used to tighten the screw anyway.

In the drawing, an embodiment of the innovation is described.

Here show:

1 shows a view of the arrangement according to the innovation seen towards the head of the lock block screw and

Fig. 2 is a section to Flg.1 in the direction of Screw axis.

In the drawings, the lens ring 1 is shown in detail, to which the lower part 3 of the closing block, which forms the screw seat 2, is connected in the usual way by soldering or welding. The upper part 4 of the closing block is firmly connected to the upper arch of the lens ring 1. The locking block screw 5 has a truncated pyramid-shaped head 6 which is surrounded by the pipe socket 7, which forms part of the lower locking block part 3. The space 8 between the glass ring 1 and the pipe socket 7 is dimensioned so that the pipe socket 7 can be pressed against one of the flats of the screw head 6 by pivoting the screwdriver 9 associated with the locking block screw 5.

Shot claims o

Claims (2)

Protection claims 1. Fuse for locking block screws, the screw _{seat is surrounded by a central thin-walled pipe socket P} which can be brought into engagement as a plastically deformable locking part with the truncated pyramidal head of the locking block screw, characterized in that between this pipe socket (7) and a fixed part of the locking block or of the glass ring (1) an intermediate space (8) is provided, the width of which corresponds approximately to the thickness of the screwdriver (9) assigned to the locking block screw (5). 2. Fuse according to claim 1, characterized in that the pipe socket (7) on which the screw seat (2) forms Closing block part (3) is formed. Munich, January 26th, 1972
Fr./L. 723J5A7-s.4.n