DE8803284U1 - Locking cylinder for a security lock - Google Patents

Description

PATENT ATTORNEYS HBMMßmCH · MOLUR ''(3ROSSE · POLLMEIER · MEV

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Ming Pa KAO, 4th Fl., MO« 4* Alley 1, Lane 531,
Yung Chi Road/ Taipei, Taiwan, ROC

■chiiefisylinder for a safety oahioB

$ _t The innovation concerns a locking cylinder for a security

Security lock, consisting of a cylinder housing, which can be fixed, for example, on or in the security lock, of a cylinder core which is rotatably mounted in the cylinder housing and which contains an insertion channel for a key which runs in its longitudinal direction and is open at least at one end, and of locking pins which are arranged and slidably guided in guide channels of the cylinder housing transversely to its axis and to the axis of the cylinder core and are supported in this cylinder housing in the radial direction against the cylinder core under pre-tension, whereby the locking pins, in a basic position of the cylinder core, extend over radial locking channels of the same from the cylinder housing, but from this release pins assigned to the key in the cylinder core can be reset with their ends against the pre-tension up to the outer surface of the cylinder by means of a suitable key inserted into the insertion channel of the cylinder core above the key in the cylinder core.

Locking cylinders of this type are already known in many different designs for creating security locks. Their security effect is mainly determined by the special design of the key, the insertion slot in the cylinder core used to hold it, and the way in which the key is effectively connected to the locking pins.

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PATENT ATTORNEYS HEMMERICH · MOLLER · GROSSE · POLLMEIER · MEY ~ ⁷

In practice, it has been shown that the security of the known locking cylinders is relatively low because they can be opened in a short time, for example in less than three minutes, because they can often be unlocked with a simple wire.

The reason for this weak security is that the structure and design of such locking cylinders are generally known and that thieves take advantage of this fact.

The innovation aims at an improved design of the locking cylinders of this type and is therefore based on the task of eliminating the problems, difficulties and disadvantages of the locking cylinders known to date.

The aim is achieved according to the invention in principle according to the characterizing features of claim 1 in that the introduction channel for the key in the cylinder core is helically delimited by a central bore and a threaded spindle received by this, that the release pins are held in contact with the core of the threaded spindle in the engagement channel by the pre-tension of the locking pins, that the key has a helically wound shaft which can be screwed into the free space of the cylinder core delimited on the one hand by the central bore of the cylinder core and on the other hand by the threaded spindle, that the free end of the shaft of the key has a wedge-shaped run-on surface for lifting the release pins from the core of the threaded spindle, and that the outer peripheral surface of the helically wound shaft on the key is provided with trough-like depressions for receiving the inner ends of the release pins.

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PATENT ATTORNEYS HEMMERICH - MOLLER · GROSSE · POLLMEIER · MEY ⁸

pins, each of which has a depth dimension, whereby the ends of the locking pins adjacent to the release pins are in line with the surface line of the cylinder core.

The essence of the innovation consists in the use of a key with a flat thread, which acts on a structural element in the cylinder core of the locking cylinder, which is also provided with a flat thread, and for this purpose must be inserted into a central hole in the cylinder core in order to be able to disengage the anti-pick mechanism of the locking cylinder.

This locking cylinder with flat thread advantageously ensures considerably increased security for doors compared to conventional locking cylinders.

According to claim 2, the innovation also provides a further development feature of the locking cylinder in that several locking pins with the associated release pins are arranged distributed in the longitudinal direction of the insertion channel for the key, wherein according to claim 3 it has proven to be particularly advantageous if the locking pins with the associated release pins are arranged one behind the other in at least one straight row.

Another important innovation feature according to claim 4 is that the threads in the threaded spindle have a profile width that is larger than the profile width of the threads on the helically wound shaft of the associated key.

PATENT ATTORNEYS HEMMERICH · MÖLLER · GROSSE - POLLMEIER · MEY ~ ⁹

Furthermore, according to the invention, the inner ends of the release pins should be designed as ball caps according to claim 5 and should be able to be engaged in the corresponding trough-like recesses on the outer circumference of the key shaft only when the threads of the key shaft are in axial contact with the threads of the threaded spindle, because this further increases the security effect for the locking cylinder.

However, according to the innovation, it is also important that the cylinder core according to claim 6 has a driver recess on its free front side, into which a driver projection of the key is engaged in a rotationally fixed manner when the threads of the key shaft are axially aligned with the threads of the threaded spindle. The rotary coupling between the key and the cylinder core is thereby further improved; and the operating safety of the locking cylinder is thereby significantly increased.

However, it is also important in accordance with the innovation that, according to claim 7, the basic position of the cylinder core in the cylinder housing can be fixed by a snap-locking device and that, according to claim 8, the locking pins and also the snap-locking device are held under pre-tension by helical compression springs.

A further innovation feature according to claim 9 is that the screw-shaped insertion channel for the key and the associated key shaft have a parallelepiped, in particular a parallelogram-shaped, profile. The profiles on the insertion channel in the cylinder core and on the key are coordinated with one another in such a way that there is a predetermined movement play between them essentially only in the axial direction of the cylinder core.

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PATENT ATTORNEYS HEMMERICH · MÖLLER · GROSSE · POLLMEIER · MEY ¹⁰

According to claim 10, the innovation concerns a flat thread locking cylinder

- consisting of a key, a threaded spindle, a cylinder core, a cylinder housing and a C-shaped locking ring that holds the cylinder core in the cylinder housing so that it cannot move axially but can rotate,

,. - with a series of recesses or depressions and

Bores which are machined longitudinally into the cylinder core and the cylinder housing,

- with several release pins and locking pins designed for reciprocating movement and with coil springs within the recesses and holes,

- with a mounting hole in the cylinder housing,

• - and with a ball socket that is in the cylinder core so

It is designed to accommodate a spring-loaded ball emerging from the bore of the cylinder housing as a snap-locking device.

Such a flat thread lock is characterized by the fact that

- the key has a helically wound shaft as a flat thread section,

- there is a ramp or a tip attachment on the shaft, which or its sloped surface is designed to initiate a back and forth movement of the release pins and the locking pins.

- the key has recesses or depressions of varying depths on the outer circumference of its screw-like shaft, which can be brought into active connection with the release pins supporting the locking pins,

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- *m«3 the width of the thread profile on the screw-like shaft of the key is smaller than the distance between the threads of the threaded spindle located in the central bore of the cylinder core.

The innovation is explained in more detail below using an example shown in the drawing.

Figure 1 shows an exploded view of a locking cylinder,

Figure 2 shows a longitudinal section through the assembled locking cylinder and

Figure 3 shows a longitudinal section through the locking cylinder with the key inserted into the cylinder core.

The locking cylinder shown in Fig. 1 of the drawing includes a key 1. This locking cylinder consists of a cylinder housing 4, a cylinder core 3 held axially immovable but rotatable by a C-shaped locking ring 5, and a threaded spindle 2 inserted into the cylinder core 3. A locking and closing system corresponding to the state of the art is arranged between the cylinder housing 4 and the cylinder core 3. It consists of the locking pins 45 and the associated release pins 44, which are accommodated in bores 43 of the cylinder housing serving as guide channels and in recesses or depressions 33 of the cylinder core serving as locking channels in such a way that they can move smoothly therein.

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The threaded spindle 2 is mounted in the cylinder core 3, to whose thread the thread of the helically wound shaft 11 of the key is adapted. When locking and unlocking the locking cylinder, the threaded spindle 2 and the helically wound shaft 11 of the key 1 therefore work together.

The cylinder housing 4 is provided with a cylindrical longitudinal bore 41 below its central axis for receiving the cylinder core 3, so that the cylinder core 3 can be arranged and mounted in the cylinder housing 4. The outer end of the longitudinal bore 41 is provided with a larger diameter, stepped recess 48, which can be used to support a support collar arranged at the free end of the cylinder core 3.

The holes 43 serving as guide channels for the locking pins 45 and a hole 49 for accommodating the snap-locking device are machined radially into the cylinder housing 4.

In addition to a locking pin 45, each of the bores 43 also accommodates an associated helical spring 46 and a support plate serving as an abutment.

The cylinder core 3 is provided with a central bore 31. A bore 32 of smaller diameter is machined into the free end face of the cylinder core 3, radially offset from the central bore 31, as a driver recess, while the other end of the cylinder core 3 has a coaxial projection 37.

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PATENT ATTORNEYS HEMMERICH · MÜLLER · GROSSE · POLLMEIER · MEY

The cylinder core 3 is provided with several radial recesses or depressions 33, which in a certain basic position of the cylinder core 3 are aligned with the bores 43 of the cylinder housing 4, which serve as guide channels. In addition, the cylinder core 3 also has a ball socket 34, which in the relevant basic position is aligned with the bore 49 in the cylinder housing 4 and then forms a receptacle for a ball 36 of the snap-locking device.

When the cylinder core 3 is inserted into the cylinder housing 4, an approximately C-shaped locking ring 5 can be inserted into an annular groove 35 arranged on the circumference of the cylinder core 3 in front of the projection 37, in such a way that the cylinder core 3 is held axially immovable but rotatable in the cylinder housing 4. The threaded spindle 2 engaging in the central bore 31 of the cylinder core 3 is equipped with a flat thread, the threads 21 of which protrude from a central, cylindrical core and reach up to the circumferential surface of the central bore 3, as can be clearly seen in the figures.

2 and 3. The key 1 has a screw-like wound shaft 11, such that it itself forms a flat thread, which has a ramp or a pointed projection 13 at its free end. In addition, the screw-like wound shaft 11 of the key is equipped with trough-like recesses or depressions 12 of different depths on its outer circumference. These trough-like recesses or depressions 12 fit with the inflection ends in the radial recesses or depressions 33 of the cylinder core.

3 guided release pins 44, whereby the inner ends of the release pins 44 are designed as ball caps.

PATENT ATTORNEYS HEMMgRICH · MÜLLER · QROSSE · POLLMEIBR < MEY * * ⁴

The screw-like wound shaft 11 of the key 1 has an ex» driver attachment 14 assigned to it, which can be used to engage with the bore 32 provided on the front surface of the cylinder core 3 and thus forms a rotationally fixed coupling between the key 1 and the cylinder core 3.

When assembling the locking cylinder, the threaded spindle 2 is first inserted into the central bore 31 of the cylinder core 3. The cylinder core 3 is then inserted into the cylindrical longitudinal bore 41 of the cylinder housing 4, in such a way that the recesses and depressions 33 serving as locking channels are aligned with the bores 43 of the cylinder housing 4 acting as guide channels. The receiving bore 49 for the snap-locking device is also aligned with the ball socket 34 of the cylinder core 3.

After the complete assembly of the locking cylinder, which can be seen in Fig. 2, the locking pins 45 are displaced by the associated helical springs 46 in the holes 43 serving as guide channels so that they penetrate into the recesses or depressions 33 of the cylinder core 3 forming the radial locking channels, and in fact so deeply that the associated release pins 44 are pushed radially inwards in the recesses 33 until their ball tips within the threads of the threaded spindle 2 abut against the core of the latter. The locking pins 45 then located both in the guide channels 43 of the cylinder housing 4 and in the recesses or depressions 33 of the cylinder core 3 effectively block the cylinder core 3 against relative rotation within the cylinder housing 4. The locking cylinder is therefore locked.

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PATENT ATTORNEYS HEMMERICH · MOLLER · GROSSE · POLLMEIER · MEY

To operate the locking cylinder, the key 1 is brought into engagement with its shaft 11 in the introduction channel of the cylinder core 3. To do this, the helically wound shaft is screwed into the central bore 31 of the cylinder core 3, gradually penetrating into the screw-like free space formed by the central bore 31 and the core and the threads 21 of the threaded spindle 2. As a result of this screwing movement of the key 1, the release pins 44 are then pushed up one after the other by the inclined starting surface or the pointed shoulder 13 out of the free space between the threads 21, and the locking pins 45 are also axially displaced in a corresponding manner - reciprocatingly.

However, if the release pins 44 and/or the locking pins 45 have different lengths, the rear ends of the release pins 44 or the adjacent front ends of the locking pins 45 can only be aligned in a very specific axial sliding position so that the separating or contact surfaces between the release pins 44 and the locking pins 45 are aligned with the circumferential surface of the cylinder core 3 or the circumferential surface of the bore 41 in the cylinder housing 4. This state is only achieved after the key 1 that fits the locking cylinder has been completely inserted and aligned.

To increase the locking capacity, it is intended that the thread profile of the helically wound shaft 11 on the key 1 has a width of less than the distance specified between the individual thread grooves 21 of the flat thread of the thread spindle 2.

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PATENT ATTORNEYS HEMMERICH · MOLLER · GROSSE · POLLMELER · MEY ¹⁶

After screwing in its screw-like shaft 11, the key 1 is then pulled into the insertion channel of the cylinder core 3 by the release pins 44, which are pre-tensioned by the coil springs 46 via the locking pins 45, until the effective support system is provided when the respective recesses or depressions 12 reach the effective range of the respective release pins 44. Only then do all the release pins 44 and locking pins 45 assume such a relative position between the cylinder core 3 and the cylinder housing 4 that the cylinder core 3 is unlocked or unlocked and can therefore be rotated in the cylinder housing 4. Since the rotation of the cylinder core 3 causes the outer ends of the release pins 44 to be adjacent to the dumbbell surface of the bore 41 of the cylinder housing 4, the engagement position of the release pins 44 in the trough-like recesses 12 on the screw-like wound shaft 11 of the key 1 is blocked, with the result that the key 1 is held in the locking cylinder.

The key 1 can only be removed from the lock cylinder again when the recesses or depressions 33 of the cylinder core 3, which also act as locking channels, have been aligned with the holes 43 of the cylinder housing 4, which act as guide channels. Only then is a joint axial displacement of the release pins 44 and locking pins 45 possible again against the effect of the coil springs 46, and thus the release pins 44 can be disengaged from the trough-like depressions 12 on the helically wound shaft 11 of the key. So that the basic position of the cylinder core 3 in the cylinder housing 4, which enables the insertion and removal of the key, can be reached easily and without any problems, the snap-in mechanism is designed to be used for the locking pins 45.

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PATENT ATTORNEYS HEMMERICK · MOLLER · GROSSE · POLLMEIER · MEY

The locking device is designed in such a way that its ball 36 moves from the bore 49 into the ball socket 34 of the empty cylinder ns 3 by means of a coil spring 46.

In order to be able to remove the key 1 in the basic position of the locking cylinder fixed by the snap-locking device, it must first be pulled axially out of the cylinder core 3 by the play existing between the thread profile of the key shaft 11 and the threads 21 of the threaded spindle 2, so that the driver projection 14 of the key knob 15 comes out of coupling engagement with the driver recess 32 of the cylinder core 3. Only then can the key 1 with its shaft 11 and the run-up saw or the pointed projection 13 be unscrewed from the central bore 31 of the cylinder core 3 and from the flat thread of the threaded spindle 2 and thus released or removed from the locking cylinder.

A locking cylinder of the type and design described above with a key 1 that has a screw-like wound shaft 11 offers significantly more design and variation options than a locking cylinder with a conventional flat key. Not only the thread profile of the elements that work together, but also the thread dimensions can be varied in many ways. In addition, the number and allocation of the locking pins and release pins between the cylinder housing and cylinder core can also be modified in many ways, so that locking cylinders with an extremely large number of locking variations can be created. The screw-like winding insertion channel for the key also makes it practically impossible to scan the anti-pick mechanism formed by the release pins and locking pins.

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Claims (1)

PATENT ATTORNEYS HEMMERICH · MÖLLER · GROSSE · POLLMEIER · MEY 10. &Mgr;&Ggr;.1338 +.ni 75 017 Hing Fa KAO, 4th Fl., No. 4, Alley I, Lane 531,
Yung Chi Road, Taipei, Taiwan, ROC Claims 1. Locking cylinder for a security lock, consisting of a cylinder housing, which can be fixed, for example, on or in the security lock, of a cylinder core which is rotatably mounted in the cylinder housing and which contains an insertion channel for a key which runs in its longitudinal direction and is open at least at one end, and of locking pins which are arranged and slidably guided in guide channels of the cylinder housing transversely to its axis and to the axis of the cylinder core and are supported in this cylinder housing in the radial direction against the cylinder core under prestress, whereby the locking pins, in a basic position of the cylinder core, extend over radial locking channels of the same from the cylinder housing, but from this release pins assigned to the key in the cylinder core can be reset with their ends against the prestress up to the outer surface of the cylinder core by means of a suitable key inserted into the insertion channel of the cylinder core,
characterized in that the insertion channel for the key (1) in the cylinder core (3) is delimited in a helical manner by a central bore (31) and a threaded spindle (2) received by this, PATENT ATTORNEYS HEMMERICH · MÖLLER · GROSSE * POLLMEIER * MEY that the release pins (44) are pre-tensioned by the Locking pins (45) are held in contact with the core of the threaded spindle (2) in the engagement channel (Fig. 2), that the key (1) has a helically wound shaft (11) which can be screwed into the free space of the cylinder core (3) which is delimited on the one hand by the central bore (31) of the cylinder core (3) and on the other hand by the threaded spindle (2) (Fig. 3), that the free end of the shaft (11) of the key (1) has a wedge-shaped run-on surface (13) for lifting the release pins (44) from the core of the threaded spindle (2), and that the outer circumferential surface of the helically wound shaft (11) on the key (1) is provided with trough-like depressions (12) for receiving the inner ends of the release pins (44), the depth of each of which has a dimension in which the ends of the locking pins (45) which are in contact with the release pins (44) are aligned with the surface line of the cylinder core (3) Coverage position (Fig. 3). 2. Locking cylinder according to claim 1,
characterized, that several locking pins (45) with associated release pins (44) are distributed in the longitudinal direction of the insertion channel (Fig. 1 to 3). 3. Locking cylinder according to one of claims 1 and 2,
characterized, that the locking pins (45) with the corresponding release pins (44) are arranged one behind the other in at least one straight row (Fig. 1 to 3). · · · · flit«· » · · < I ill· PATENT ATTORNEYS HEMMERIGH -"MÖLLER · QROSSE · POLLMEIER -MEY ³ 4. oil-filled glass according to one of claims 1 to 3,
characterized by that the threads (21) in the threaded spindle (2) have a profile width which is larger than the profile width of the threads on the screw-like wound shaft (11) of the associated key (1; Pig. 3). 5. Locking cylinder according to one of claims 1 to 4, characterized in that the inner ends of the release pins (44) are designed as ball caps and can be engaged in the corresponding trough-like recesses (12) on the outer circumference of the key shaft (11) only when the threads of the key shaft (11) are axially in contact with the threads (21) of the threaded spindle (2) (Fig. 3). 6. Locking cylinder according to one of claims 1 to 5,
characterized, that the cylinder core (3) has a driver recess (32) on its free front side, into which a driver projection (14) of the key (1) is engaged in a rotationally fixed manner when the threads of the key shaft (11) are axially in contact with the threads (21) of the threaded spindle (2) (Fig. 3). 7. Locking cylinder according to one of claims 1 to 6,
characterized, that the basic position of the cylinder core (3) in the cylinder housing (4) can be fixed by a snap-locking device. PATENT ATTORNEYS HEMMe'r'iCH ''mOLLER «'gROs'sE · POLLMEIER · MEY 8. Locking cylinder according to one of claims 1 to 7,
characterized, that the locking pins (45) and the snap-locking device are held under pre-tension by helical compression springs (46). 9. Locking cylinder according to one of claims 1 to 8,
characterized, that the screw-shaped insertion channel for the key (1) and also the associated key shaft (11) have a parallelepiped, in particular a parallelogram-shaped, profile. 10. Flat thread locking cylinder, - consisting of a key, a threaded spindle, a cylinder core, a cylinder housing and an approximately C-shaped locking ring that holds the cylinder core in the cylinder housing so that it cannot be moved axially but can rotate, - with a series of recesses or depressions and holes, each of which is machined lengthwise into the cylinder core and into the cylinder housing, - with several release pins and locking pins designed for reciprocating movement and with coil springs within the recesses and holes, - with a mounting hole in the cylinder housing, - and with a ball socket which is provided in the cylinder core in such a way that it can accommodate a spring-loaded ball emerging from the bore of the cylinder housing as a snap-locking device, characterized. ·■ ItIt ·' · · II I Il &diams; · a « · ■ &igr;&igr; < < · t PATENT ATTORNEYS HEMMEFHCH ' MÖLLER ' GROSSE · POLLMEIER < MEY that the key (1) has a shaft (11) wound in a screw-like manner as a flat thread section, that the shaft (11) has a ramp or a tip anatomy (13) which or its ramp surface is designed to initiate a back and forth movement of the release pins (44) and the locking pins (45), that the key (1) has recesses or depressions (12) of varying depths on the outer circumference of its screw-like wound shaft (11), which can be brought into operative connection with the release pins (44) supporting the locking pins (45), and that the width of the thread profile on the screw-like wound shaft (11) of the key (1) is smaller than the distance between the threads (21) of the threaded spindle (2) seated in the central bore (31) of the cylinder core (3).