DE8902774U1 - Core pull lock - Google Patents

Description

The innovation concerns a core pulling lock for a cylinder core arranged in a lock cylinder housing.

With such locking cylinders it may be possible to pull the cylinder core out of the locking cylinder housing using special tools, which then makes it possible to operate the lock.

A device is known from US-PS 17 &1 092, in which the core is secured against axial withdrawal by a locking plate, whereby this locking plate engages in an annular groove in the cylinder core. This position, i.e. the engagement position of the locking plate in the groove in the cylinder core, is constant and this results in disadvantages when assembling and disassembling the cylinder core.

The aim of the innovation is therefore to create a core puller which, on the one hand, prevents the core from being pulled out using a special tool in a simple manner and, on the other hand, does not cause any interference when disassembling or assembling the cylinder core.

This problem is solved according to the innovation with the features in the characterising part of claim 1.

Preferred embodiments emerge from the subclaims.

The main idea of the innovation is that the core puller lock is not in its locking or locking position in the usual position of the cylinder core, but only starts its function

fulfilled if, for example, an attempt has been made to pull the cylinder core out of the lock cylinder housing using a special tool, and this by a very specific distance. Only with this movement, which can be 0.5 mm, does the segment used according to the invention elongate under the spring pressure .

;-' into the recess in the lock cylinder housing so that

V then further pulling out the cylinder core from

H the lock cylinder housing is prevented.

The special advantage of this innovative training is that the dismantling of the

U cylinder core by turning the core without further

can be done because the core puller lock only works in the extraction

Y> position, i.e. effective when the cylinder core is pulled out

|, would become.

The innovation will be explained below using the drawings, whereby the

Figure 1 shows schematically and partly in section the recess in the cylinder,

Figure 2 the formation of the segment and

Figure 3 shows a partial section through the 7y1indar housing with the recess in the housing.

In detail, it can be seen from the figures that the cylinder core 1 has a recess 2 into which a segment 5 is inserted, which is spring-loaded, in such a way that it can be pressed radially outwards. It is easily possible to provide several segments of this type in corresponding axially successive recesses or, if necessary,

If also distributed over the circumference of the cylinder core. Assigned to this segment ^r > int a recess 4 in the
SchiieOzy1indergeheime 3. Hei several segments, wi
v/r) r &eegr; t ehnnd specified, &rgr;.&rgr;&Pgr;&igr;&eegr;&Igr; vnrnl !null icli more such recesses must be provided in the cylinder housing. The axial arrangement rinn Seyrnentes 5 or the
Recess 2 in the cylinder core 1 is offset from recess 4 in the cylinder housing 3, and two such that (in the normal position of the cylinder core j relative to the cylinder housing) the segment b is at the
Inner wall of the cylinder housing slides smoothly
can. If you try with a spray tool
If the cylinder core 1 is to be pulled out of the cylinder housing 3, the sequence b &ogr;&igr; ·· r accordingly, the segments snap into the recess 4 or the corresponding recesses, so that then the further
This prevents roughening of the cylinder core.

Claims (3)

5 c h &ugr; t 7 a &eegr; s &rgr; r ü el &igr; e : 1. Core pulling lock for a cylinder core arranged in a locking cylinder, characterized in that a spring element (') which can be pushed radially into a recess (') in the cylinder core (3) is provided in a recess (2) of the cylinder core (1) , and which, in its retracted position, is flush with the circumference of the cylinder core (1). ke riifis (1) and whose axial position in the cylinder core (1) is arranged axially offset to the recess (4) in the closing cylinder housing (5), this distance being dimensioned such that the segment (5) only engages after an initial withdrawal (axial &eegr; movement) of the cylinder core (1) from the closing cylinder housing (5), thus preventing further withdrawal of the cylinder core (1). 2. Core pulling lock according to claim 1, characterized in that several such segments (5) are axially arranged one behind the other and optionally distributed over the circumference of the cylinder core (1) and corresponding recesses are provided in the locking cylinder housing (3). 3. Core pulling lock according to one of claims 1 or 2, characterized in that the locking of the segment(s) takes place after the cylinder core has been pulled out by 0.5 mm.