DE8702013U1 - Box lock - Google Patents

Abstract

1. Box lock with a tongue of adjustable dimension, in which the particular dimension of the tongue is determined by the disposition of the drive element (2) moved by the cylinder or knob in or on an insert plate (3), characterised in that the insert plate (3) has two recesses (6) arranged in mirror symmetry with respect to the plane of symmetry (7) of the lock, for receiving the drive element (2), and is capable of being rotated through 180 degrees and fixed on the lock cover (4), the two fixing points (5) of the lock cover (4) being arranged relative to the recesses (6) in such a way that, in plan view of the lock, the centre (9) of the line (8) connecting the two fixing points (5) is located on the line of symmetry (7) of the recesses (6), at a spacing (x) from the point of intersection of the centre line (10) of the recesses (6) with the line of symmetry (7), which is half the size of the desired change in dimension of the tongue.

Description

Description

The innovation relates to a box lock with variable backset according to the preamble of ' claim 1.

W It is well known that box locks are

* to design a fixed backset, e.g.

of 60 mm, but there are also

si versions where the backset is adjustable, e.g. from 55 - 85 mm. To do this

:: the drive element connected to the

:■; External cylinder works together, offset in the lock itself

JJ, and this requires a reassembly of the H corresponding to the drive element

'. Holding elements, e.g. an insert plate, which is connected to the

\ Lock cover is connected. Since the setting of the

Backset usually before installing the lock

is carried out, efforts are made to make the adjustability as simple as possible so that it can be adapted to the desired dimension in a short time. In practice, however, it has been shown that the previous designs involve a considerable amount of time due to the corresponding folding of the insert plate, the re-fastening and the attachment of the individual parts, including the drive element.

&Lgr; It is therefore the task of the innovation to create a box lock with an adjustable backset, whereby the change of the backset can be carried out quickly and easily.

This task is solved in a new way by the fact that the insert plate has two mirror-symmetrically arranged recesses for accommodating the drive element

and can be rotated by 180° and fixed to the lock cover. It is important that the fixed points are arranged in relation to the recesses so that the center point of the connecting line of the fixed points is on the symmetry line of the recesses, at a distance from the intersection point of the center line of the recesses with the symmetry line, and this distance ultimately corresponds to the desired change in backset. In other words, this means that a change in backset from 60 to 70 mm or vice versa is possible if this distance is 5 mm, i.e. half the change in backset.

The newly designed insert plate means that it only needs to be turned by 180° and then the drive element can be installed with a different backset.

J> The innovation will be explained using the drawings, where Figure 1 shows a view from above into the box lock with a schematically indicated insert plate and Figure 2 shows a side view, partly in section.

Two fixed points 5 are provided on the lock cover 4, whereby in the example shown these lie on a connecting line that intersects the connecting line of the recesses 6 for the drive element 2 at an angle that differs from 90°. These recesses 6 are arranged mirror-symmetrically to the plane of symmetry, which is referred to below as the line of symmetry 7. As can be seen from Figure 1,

the connecting line θ of the fixed points 5 intersects the line of symmetry 7 at a distance X from the point of intersection of the center line 10 of the recesses 6, which is perpendicular to the line of symmetry 7. This distance X is essential for the innovative solution.
It is readily apparent that the arrangement of the fixed points themselves does not have to be as in the example shown, but they can, for example, also lie on the line of symmetry 7 or even mirror-symmetrically to this line of symmetry 7, provided that the center point 9 of the connecting line 8 of these fixed points lies on the line of symmetry 7 and at a distance X which is half the desired change in dimension. As can be seen from the drawing, the drive element 2 is connected to the insert plate 3 by means of a locking disk 1. The change in the backset from, for example, 60 to 70 mm is now carried out simply by removing this locking disk, pulling out the drive element and turning the insert plate 3 by 180° so that this plate then returns to the locking position determined by the fixed points 5. The pivot point is the center point 9. After this rotation by 180°, an arrangement is obtained which is indicated in Figure 1b, ie after inserting the drive element and securing it with the locking washer 1, the backset has changed from 60 to 70 mm.

Figure 2 shows, partially in section, the arrangement of the insert plate in the lock cover, whereby, to complete the illustration, the rotary knob 11 is also shown here, which interacts with the drive element 2.

Claims (1)

Box lock Claim: Case lock with adjustable backset, whereby the respective backset is determined by the arrangement of the drive element moved by the cylinder or knob in or on an insert plate, characterized,
that the insert plate (3) has two mirror-symmetrically arranged recesses (6) for receiving the drive element (2) and can be rotated by 180° and fixed on the lock cover (4), the fixed points (5) being arranged in relation to the recesses (6) such that the center point (9) of the connecting line (8) of the fixed points (5) lies on the line of symmetry (7) of the recesses (6), namely at a distance (x) from the intersection point of the center line (10) of the recesses (6) with the line of symmetry (7) which is half as large as the desired backset change.