CZ294916B6 - Cylinder lock with a cylinder housing and a flat key to such a cylinder lock - Google Patents

Abstract

The invention relates to a cylinder lock with cylinder housing (1) and a cylinder core (2) that is rotatable mounted therein. Said cylinder core (2) comprising a key channel (4) for a flat key (5) and scanning elements (25) for control surfaces of the key (4), in addition to locking elements, which block the cylinder core (2) and prevent it from rotating or which release said cylinder core (2). According to the invention, a displaceable safety shackle (26) is arranged in the cylinder core (2) in a plane, which is perpendicular to the median longitudinal plane (7) of the cylinder lock and overlaps the key channel (4) on a narrow side by means of its locking limb (27). The locking limb (27) can be moved between a locking position and a released position by means of control surfaces of the flat key (5) and by the force of a lifting spring (35). When the flat key (5) is not fully inserted in closing position, the key is held in the cylinder housing (1) locking recess (28) by its locking block (30). Disclosed is also a flat key (5) for the above-described cylinder lock, which key (5) is provided with variation elements such as slots and/or longitudinal profiled grooves and lateral profiled recesses wherein said key (5) is provided on its back (38) with a release recess (29) being followed up with a locking block (30) directing toward the flat key (5) tip.

Description

Cylinder lock with cylindrical bed and flat key for cylinder lock

Technical field

BACKGROUND OF THE INVENTION The invention relates to a cylindrical lock having a cylindrical seat and a cylindrical core rotatably supported therein, provided with a key channel and sensing elements for the flat key control pads and blocking elements to prevent or allow the cylindrical core to rotate. a sliding catch is provided on the tapered side, with its stop extending beyond the key channel, and the movement of the stop is controlled by the flat key control surfaces and the lifting spring force between the closing and unlocking positions; in the ratchet recess of the cylindrical seat, and a flat key for the cylindrical lock.

BACKGROUND OF THE INVENTION

In cylindrical locks, the inserted spanner should only be retracted in the so-called zero position. Care must be taken to prevent the flat key from being pulled out in any other twisted position, particularly in the 180 ° cylindrical core position. The known design measures do not prevent this in many cases.

However, when the cylindrical core is in the zero position, it should be possible to remove the flat key from the lock even if a tensile force has been exerted upon it when it is rotated. This is the case, for example, when the door is pulled into the locking position by means of a rotated flat key, and the user attempts to pull it out while maintaining the pulling force. In cylinder locks, it is possible for the locking elements arranged in the interior of the cylinder lock to become locked as a result of the pulling force when turning the flat key, so that these elements can no longer reach the release position or only if the flat key has been released and then pulled out. This fact is considered by many users of cylinder locks and flat keys to be a drawback of the cylinder lock design.

SUMMARY OF THE INVENTION

SUMMARY OF THE INVENTION It is an object of the present invention to overcome these drawbacks and to solve the problem in such a way that the key is removable from the cylinder lock only in the specified zero position and that in the otherwise rotated position the locking elements arranged in the cylinder lock are relieved of the traction force. the flat key is exerted by a tractive force.

This object accomplishes and eliminates the disadvantages of a cylindrical lock with a cylindrical bed and a cylindrical core rotatably supported therein, provided with a key channel and sensing elements for the flat key control pads and blocking elements to prevent or allow the cylindrical core to rotate. with respect to the longitudinal median plane of the cylinder lock, a sliding catch is provided, which on the tapered side extends beyond the key channel with its stop, and the movement of the stop is controlled by the flat key control surfaces and the spring force between the closing and unlocking positions; it is held by its closing flank in the ratchet recess of the cylindrical seat according to the invention, the essence of which is that the sliding catch consists of a guide mandrel slidably arranged in a channel in the cylindrical core and provided with at the free end with a laterally arranged stop.

-1 CZ 294916 B6

Advantageously, the sliding catch is arranged in a plane whose distance from the inner end of the cylinder lock is variable, in particular formed in a plane arranged in front of the first core pin of the cylinder core.

It is further preferred that the cylindrical core is provided with a transverse groove for guiding and moving the sliding catch.

According to the invention, the stop may be arranged at an oblique angle with respect to the perpendicular to the longitudinal median plane, the oblique angle being substantially 30 °.

The stop may be perpendicular to the longitudinal center plane and may additionally be provided with an inclined rib extending into the inclined recess of the flat key.

The essence of the flat key for the cylinder lock, which is provided with variation elements such as notches and / or longitudinal profile grooves and side profile recesses, is that the flat key is provided on its spine with a release recess followed by a closing flank facing the tip of the flat key.

The release recess away from the back of the flat key may have a depth corresponding to the height of the stop and the release recess away from the closing flank of the flat key may have a height value that is less than the depth of the release recess.

According to the invention, the release recess is formed in a direction away from the tip of the flat key at a distance that is variable, in particular formed before the first key cut.

The release recess can be provided in an inclined direction on the back of the flat key.

The advantage of relieving the cylinder lock when subjected to tensile stress applies to all cylinder lock structures of this kind.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a cross-sectional view of a cylinder lock of a randomly selected structure as an example; Fig. 2 shows a schematic longitudinal section of a cylindrical core part with a flat key inserted in the zero position of the cylindrical core; Fig. 4 is a cross-sectional view of the cylinder lock taken along the line IV-IV in Fig. 2; Fig. 5 is a top view of the cylindrical core in longitudinal section of the cylindrical seat, the parts not for the invention; 6 is a top view of a cylindrical core in longitudinal section of a cylindrical seat according to a second exemplary embodiment of a cylinder lock; and FIG. 7 is a top view of a dorsal portion of one of the exemplary embodiments of a flat key.

DETAILED DESCRIPTION OF THE INVENTION

According to FIG. 1, a cylindrical core 2 is rotatably mounted in a cylindrical seat 1, rotatable along a cylindrical pivot surface 3. In the cylindrical core 2 is a key channel 4 in which a flat key 5 with a toothed portion 6 provided with known key notches 6 is inserted. It is arranged in the longitudinal center plane 7 of the cylinder lock together with the bore 8. The bore 8 accommodates a core pin 9, which is brought into position by the key notches 36 of the flat key 5 on its toothed part 6.

-2GB 294916 B6

A guide channel 10 extends parallel to the core pin hole 8 in the cylindrical core 2 and extends through the cylindrical core 2. In the guide channel 10 there is a guide body 11 abutting the side of the core pin 9. The guide body 11 is on its opposite side On the side 12 facing away from the key channel 4, a release groove 13 is provided. A transverse recess 16 is disposed perpendicularly to the guide channel 10, in which a closure element 17 is slidably mounted, which is pressed against the bearing recess 19 formed in the cylindrical seat 1 by means of a compression spring 18. In the zero position of the cylindrical core 2 shown in FIG. 1, the end portion of the locking element 17 formed by the locking pin 20 is inserted into the bearing recess 19.

The closure element 17 is provided at its inner end opposite to each guide body 11 with a pivot pin 21 which, by its size, allows insertion into the release groove 13.

The operation of the cylinder lock according to the invention is as follows.

Upon insertion of the flat key 5, the core pin 9 is compressed by the toothed part 6 of the flat key 5 against the force of the compression spring 15 down into the assigned position. The guide body 11 moves together in such a way that, using the correct flat key 5, the release groove 13 comes into the position shown, so that the locking pin 20 of the locking element 17 lies in the opposite position. Thus, when the cylindrical core 2 is rotated, the locking element 17 with its snap-in pin 20 can be pushed out of the bearing recess 19, the sensor pin 21 being inserted into the release groove 13. The cylindrical core 2 can then be freely rotated.

When using a plurality of core pins 9 and guide bodies 11, all of these components must assume a predetermined position so that the closure element 17 can reach the release position.

When using the wrong flat key, the core pin 9 of the cylindrical core 2 and the associated guide body 11 assume a different position, so that the pick-up pin 21 hits the side 12 of the guide body 11, thereby locking the cylinder lock.

In the plane of rotation of the guide body 11, the cylindrical seat 1 is provided with an annular groove 22 open towards the cylindrical core 2. The width of the annular groove 22 is the same as the width of the guide body 11, but may be greater. The circular groove 22 releases the ends of the guide body 11 and the core pin 9, thereby increasing both the stroke and the two components can be made elongated, thereby improving their guidance in the guide channel 10 and in the core pin hole 8. In addition, the upper end of the guide body 11 engages in the annular groove 22 when the flat key 5 is not inserted, thereby providing protection against withdrawal of the cylindrical core 2. Thus, the cylindrical core 2 cannot be broken by the known extraction method. Thus, for the aforementioned features of the cylinder locks, the flat key 5 may correspond to any suitable conventional flat key shape suitable for split retaining pins. In the exemplary embodiment herein, the flat key 5 is provided with longitudinal profile grooves 23 and side profile recesses 24, which are removable in a known manner by means of additional sensor elements 25 transversely mounted in the cylindrical core 2. These additional sensor elements 25 provide various variation possibilities.

In Fig. 1 there is a cylindrical seat 1 of conventional shape with a bridge 32. As can be seen from Fig. 1, no cylinder lock elements are arranged in this bridge 32. Therefore, the bridge 32 can either be removed as would be desirable with the cylinder locks, or it can also be used to arrange additional lock and fastening elements (not shown). The arrangement of the circular grooves 22 is shown by way of example only and is also not necessary.

Giant. 2 shows a section in the longitudinal median plane 7 through the inner end section of the cylindrical core 2 and the cylindrical seat 1. The flat key 5 is fully retracted so that all the core pins 9 not shown here associated with the individual key slots 36 are adjusted so that the cylindrical core 2 it could be rotated with respect to the cylindrical seat 1. In the plane transverse to the longitudinal axis, it was rolled

In the cylindrical core 2, a sliding catch 26 is provided in the cylindrical core 2, extending on the tapered side of the key channel 4 with its stop 27

As can be seen in particular from FIG. 4, the upper end of the sliding catch 26 abuts with its stop 27 in the latch recess 28 in the cylindrical receptacle 1. The flat key 5 has a release recess 29 in the direction opposite to the stop 27. it is free to rotate the cylindrical core 2, since by turning it, the stop 27 is pushed out of the latch recess 28 and released by sliding it downwards into the release recess 29. However, this possibility of moving the sliding catch 26 is possible only when the spanner 5 fully inserted in the cylinder lock. If the flat key 5 is not fully inserted, the closing flank 30 of the flat key 5 will fall below the stop 27 so that the stop 27 cannot be moved downwards and consequently cannot be rotated by the cylindrical core 2.

In terms of dimensions, the possibilities are, for example, that the overall depth of the release recess 29 is equal to the overall height of the stop 27. The depth X of the latch recess 28 in the cylindrical seat 1 corresponds approximately to the depth value X 'of the release recess 29 against the closing flank 30 towards the flat tip. The depth Y of the release recess 29 away from the back 38 of the flat key 5 corresponds to the height Ύ 'of the stop 27.

As shown in FIG. 2, the position of the closing flank 30 relative to the back 38 of the flat key 5 is lowered. This reduction allows the tip of the flat key 5 to be inserted under the stop 27. The reduction also affects the further locking function of the flat key 5, since conventional flat keys that do not have this reduction cannot be fully inserted into the key channel 4.

The effect of the solution is that the closing flank 30 is shortly before the flat key 5 is fully inserted into the key channel 4 below the stop 27, thus preventing premature rotation of the cylindrical core 2. As a result, the lateral loading of the cylindrical core pins 2 is eliminated. They are relieved from any rotary movement, since rotation is only possible if the key 5 has been fully inserted.

In the rotated position of FIG. 3, with the flat key 5 fully retracted, this stop 27 holds it firmly in position so that it can no longer be pulled out.

As can be seen from FIG. 4, the sliding catch 26 consists of a guide mandrel 33 slidably mounted under the pressure of the lifting spring 35 in the guide channel 34 formed in the cylindrical core 2.

The outer surface 39 of the stop 27 abutting in the latching recess 28 is so wide that the stop 27 cannot be inserted into another of the abutting recesses 19 to prevent movement restriction when the cylindrical core 2 is rotated.

As can also be seen from FIG. 2, the sliding catch 26 is preferably located before the first notch 36 of the flat key 5 from its tip.

The axis of the sliding catch 26 from the tip of the spanner 5 has a distance Z, which is, however, practically variable, so that the sliding catch 26 can be arranged at a greater distance from the tip of the spanner 5.

Since the distance Z is variable, the number of variations of the flat key 5 and the cylinder lock also increases, which represents a further advantage of the present invention.

2 to 5, in the cylinder lock, a stop 27 and a release recess 29 on the back 38 of the flat key 5 are shown transversely so that they are vertical with respect to the longitudinal median plane 7. However, the arrangement can advantageously also be inclined, as 6 and 7.

-4GB 294916 B6

FIG. 5 shows the arrangement of the slide 26 in a top view of the cylindrical core 2. The holes 8 for the core pins 9 are shown here only schematically, the core pins 9 not being shown therein. A transverse groove 37 is formed in the cylindrical core 2 to provide the necessary space for movement of the stopper 27 of the sliding catch 26, which is also evident from FIG. 4.

The arrangement of the sliding catch 26 and the design of the flat key 5 are largely independent of the rest of the cylinder lock structure.

Referring to FIG. 6, the cylinder lock can also be varied such that the stop 27 of the sliding catch 26 can be arranged obliquely with respect to the longitudinal center plane 7 of the cylinder lock. As a result of this arrangement, the transverse groove 37 of the cylindrical core 2 is also inclined. The angle to the perpendicular is plotted somewhat enlarged and in practice is approximately 30 °. This corresponds to the angled arrangement of the release recess 29 shown in FIG. 7, which contributes to increasing the number of variations and to securing the cylinder lock against unauthorized unlocking.

Alternatively, in the cylindrical lock, the vertical arrangement of the stop 27 shown in FIG. 2 may also be combined with the inclined arrangement of the release recess 29 on the back 38 of the flat key 5 so that an inclined notch is formed on the stop 27.

Claims (10)

PATENT CLAIMS A cylinder lock with a cylindrical seat (1) and a cylindrical core (2) rotatably supported therein, provided with a key channel (4) and sensing elements (25) for the flat key control pads (5) and locking elements to prevent or allow rotation of the cylindrical core (2), wherein in the cylindrical core (2) a transverse plane with respect to the longitudinal median plane (7) of the cylinder lock is disposed in the cylindrical core (2), which protrudes on the tapered side with its stop (27) the stop (27) is operable by the flat key (5) and lift spring force (35) between the closing and unlocking positions, and when the flat key (5) is not fully retracted in its closing position, it is held in its latch by its closing flank (30) (28) cylindrical seat (1), characterized in that the sliding catch (26) consists of a guide mandrel (33) slidably disposed in the cylinder (34) a core (2) and provided at its free end with a laterally arranged stop (27). Cylinder lock according to claim 1, characterized in that the sliding catch (26) is arranged in a plane whose distance (Z) from the inner end of the cylinder lock is variable, in particular formed in a plane arranged in front of the first cylindrical core pin (9) cores (2) · A cylinder lock according to claims 1 and 2, characterized in that the cylindrical core (2) is provided with a transverse groove (37) for guiding and moving the sliding catch (26). Cylinder lock according to one of Claims 1 to 3, characterized in that the stop (27) is arranged at an oblique angle with respect to the perpendicular to the longitudinal median plane (7). A cylinder lock according to claim 4, characterized in that the inclined angle is substantially 30 °. -5GB 294916 B6 A cylinder lock according to any one of claims 1 to 3, characterized in that the stop (27) is perpendicular to the longitudinal center plane (7) and is additionally provided with an inclined rib extending into the inclined release recess (29) of the flat key (5). . The cylinder lock key according to any one of claims 1 to 6, which is provided with variation elements such as notches and / or longitudinal profile grooves and side profile recesses, characterized in that the key (5) is on its back (38). ) is provided with a release recess (29) adjoining the closing flank (30) facing the tip of the flat key (5). A flat key according to claim 7, characterized in that the release recess (29) away from the back (38) of the flat key (5) has a depth (Y) corresponding to the height (Y ') of the stop (27), the release recess (29). ) from the closing flank (30) of the flat key (5) has a height value (X ') that is less than a depth (Y). A flat key according to claim 7 or 8, characterized in that the release recess (29) is formed in a direction away from the tip of the flat key (5) at a distance (Z) that is variable, in particular formed before the first key cut (36). ). A flat key according to any one of claims 7 to 9, characterized in that the release recess (29) is provided in an oblique direction on the back (38) of the flat key (5).