CZ20023336A3 - Cylindrical lock with cylindrical bed and flat key for such cylindrical lock - Google Patents

Abstract

The invention relates to a cylinder lock with a cylinder housing (1) and a cylinder core (2) which is rotatable therein, said cylinder core 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 (25) which block the cylinder core and prevent it from rotating or which release said cylinder core. According to the invention, a displaceable safety shackle (26) is arranged on a plane which is perpendicular to the median longitudinal plane (7) of the cylinder lock and overlaps with the key channel (4) on a narrow side by means of a locking limb (27). The locking limb can be moved between a locking position and a released position by means of control surfaces of the key (5) and by an elastic force (35). When the flange key is fully inserted, said locking limb is placed opposite to a release recess (29) of the key .When the key is not fully inserted, said locking limb is held n a locking position by a locking flank (30) of the key in a locking recess (28) of the cylinder housing.

Description

Technical field

BACKGROUND OF THE INVENTION The present invention relates to a cylindrical lock with 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 locking elements to prevent or allow rotation of the cylindrical core and the flat key to the cylinder lock.

BACKGROUND OF THE INVENTION

In cylindrical locks, the inserted key should only be withdrawn in the so-called zero position. Care should be taken to prevent the 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 key from the lock even if a tensile force has been exerted on the key during its rotation. This is the case, for example, when the door is pulled to the locking position by means of a rotated key and then the user attempts to remove the key while maintaining traction. In the case of locks, it is possible for the locking elements arranged in the interior of the lock to become locked as a result of the pulling force when the key is turned so that these elements can no longer reach the release position or only if the key has been released briefly and then withdrawn. This is considered by many users of locks and keys to be a drawback of the 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.

The above object accomplishes and removes the above-mentioned disadvantages of a cylinder lock with a cylindrical bed and a cylindrical core rotatably mounted therein, provided with a key channel and sensing elements for the flat key control pads and blocking elements to prevent or allow rotation of the cylindrical core. that in the cylindrical core, a sliding tab is provided in a plane transverse to the longitudinal median plane of the cylinder lock, which on its tapered side extends beyond the key channel with the stop, the movement of the stop being controlled by the flat key control surfaces and the spring force between the closing and unlocking positions; If the flat key is not fully inserted in the closing position, it is held in the latching recess of the cylindrical seat by its closing flank.

It is advantageous if the sliding catch consists of a guide darkly slidably arranged in the channel in the cylindrical core and provided with a laterally arranged stop at the free end.

Furthermore, it is advantageous if the sliding catch is arranged in a plane whose distance from the inner end of the cylinder lock is variable, it being preferred that this plane is in front of the first core pin of the cylinder core.

According to the invention, it is advantageous if the cylindrical core is provided with a transverse groove for guiding and moving the sliding catch.

According to the invention, the stop can be arranged at an oblique angle with respect to the perpendicular represented by the longitudinal median plane, the oblique angle preferably being 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.

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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 may have a height that is less than the depth of the release recess.

According to the invention, the release recess is at a distance from the tip of the flat key at a distance that is variable, preferably 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 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 part 6 provided with known key notches 36 is inserted. arranged in the longitudinal central plane 7 of the cylinder lock together with the bore 8. The bore 8 accommodates a core pin 9, which is a key.

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By means of the notches 36 of the flat key 5 on its toothed part 6, it is brought into position.

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 on its side a core pin 9. Guide body Π. On its opposite side 12 facing away from the key channel 4, a release groove 13 is provided. At the upper end of the guide body 11, a detent tab 14 is provided, supported by a compression spring 15. A transverse recess 16 is arranged perpendicular to the guide channel 10. wherein the locking element 17 is slidably mounted and is pressed by the pressure spring 18 to the bearing recess 19 formed in the cylindrical seat 1. In the zero position of the cylindrical core 2 shown in FIG. 1, the end portion of the locking element 17 is formed by the locking pin 20, inserted into the bearing recess 19.

The closure element 17 is provided at its inner end opposite each guide body 11 with a detachment 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 element Π is moved together in such a way that by using the correct flat wrench 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 elements must assume a predetermined position so that the closure element 17 can reach the release position.

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When using the wrong flat key, the core pin 9 of the cylindrical core 2 and the associated guide body 11 take a different position, so that the pickup pin 21 stops against 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 the core pin hole 8. In addition, the upper end of the guide body 11 engages in the annular groove 22 in the absence of a flat key 5, 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 shown here, 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 offer 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 the space 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 associated with the individual key slots 36 are aligned so that the cylindrical core 2 For example, in the cylindrical core 2, a sliding catch 26 extending beyond the tapered side of the key channel 4 by its stop 27 is arranged in the cylindrical core 2.

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 seat 1. The flat key 5 has a release recess 29 in the direction opposite to the stop 27. the core 2 is freely rotated, since by rotating 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 only possible when the flat key 5 is completely 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 the same as the overall height of the stop 27. The depth X of the latch recess 28 corresponds approximately to the depth of the release recess 29 opposite the closing flank 30 towards the tip of the spanner 5.

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.

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

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 T7 is formed in the cylindrical core 2 to provide the necessary space for movement of the stopper 27 of the slide tab 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 it is also oblique to save 9 9 99 99 • 9 ·· ·· · · ·

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99 999 999 99 9999 the transverse groove 37 of the cylindrical core 2 is given. 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 lock against unauthorized unlocking.

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

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Claims (11)

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), characterized in that in the cylindrical core (2) a sliding catch (26) is provided in a plane transverse to the longitudinal central plane (7) of the cylinder lock, which overlaps the key channel (4) on its tapered side ), the movement of the stop (27) being 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 the closing position, it is its closing flank (30) maintained in the ratchet recess (28) of the cylindrical seat (1). A cylinder lock according to claim 1, characterized in that the sliding catch (26) consists of a guide darkness (33) slidably arranged in a channel (34) in the cylindrical core (2) and provided with a laterally arranged stop (27) at its free end. Cylinder lock according to claims 1 and 2, 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, it being advantageous if this plane is in front of the first a core pin (9) of the cylindrical core (2). A cylinder lock according to claims 1 to 3, characterized in that the cylindrical core (2) is provided with a transverse groove (37) for guiding and shifting the sliding catch (26). -10 · toto toto to to to to A cylinder lock according to any one of claims 1 to 4, characterized in that the stop (27) is arranged at an oblique angle with respect to the perpendicular represented by the longitudinal center plane (7). The cylinder lock of claim 5, wherein the oblique angle is approximately 30 °. A cylinder lock according to any one of claims 1 to 4, 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 7, 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 8, 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) and the release recess (29). from the closing flank (30) has a height (X) that is less than a depth (Y). The flat key according to claim 8 or 9, characterized in that the release recess (29) is in a direction away from the tip of the flat key (5) at a distance (Z) that is variable, preferably before the first key cut (36). The flat key according to any one of claims 8 to 10, characterized in that the release recess (29) is designed in an oblique direction on the back (38) of the flat key (5). Giant. 1