CZ300731B6 - Cylinder-type lock and key? - Google Patents

Abstract

In the present invention, there is disclosed a cylinder-type lock comprising a cylinder lock body (2), a cylinder (6), which can be rotated by the key (9), tumblers (4) and (15), first blocking pin (3) and blocking pins (14) and springs (8), in which cylinder-type lock at least in one, advantageously in the first hole (1) performed in the cylinder lock body (2) there is arranged the first blocking pin (3) contacting the tumbler (4) placed in the hole (5) of the cylinder (6), whereas the sum of length of the blocking pin (3) and tumbler (4) length is such that during overcoming the spring (8) resistance and during contact of the first blocking pin (3) with the hole (1) bottom, a frontal cone of the tumbler (4) reaches up to a key hole (7) in the cylinder (6) in such a way, that the width of the key hole (7) is restricted thereby at the spot of the tumbler (4) frontal cone. The key (9) has its own individual codes (10) at a level of its contact surfaces (11) interconnected by a path (12) and a leading surface (13) of the key (9) has a width that allows reciprocal movement of the key (9) to the key hole (7) along the frontal cone of the tumbler (4).

Description

Lock cylinder and key

Technical field

The invention relates to the field of lock technology, in particular lock cylinders operated by flat keys, whose codes on the side surfaces form a series of dimples and the codes on the edges form a series of cut-outs.

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BACKGROUND OF THE INVENTION

Known and most widespread lock cylinders are made up of a lock cylinder body, a key-rotated cylinder and tumblers, locking pins, eventually pedestals and springs.

The cylinder is controlled by a flat key, whose codes are formed as a series of dimples on the side surfaces of the key or as a series of cutouts on the edges of the key, or as a combination of both. The disadvantage of such assembled cylindrical lock cylinders is that they are easily overcome by using the dynamic impact unlocking method. This method, known as the SG effect, consists of first creating a tool such that codes - notches or pits - are created in the key blank or in a similar key in the number of tumblers and at their pitch. The codes on the tool have the same shape and depth as the deepest for a given cylinder lock type. The tool thus adjusted is pushed into the cylinder as far as it will go, brought back by at least one code pitch and is pushed back to the stop by a direct blow to the tool. The inclined surface of the cut-outs or dents of the tool strikes the tumbler's front cones against the locking pins and against the springs. When the tumblers and locking pins are reversed, a gap is created between the tumblers and pins due to differentially distributed forces and different weights of the tumblers and pins, which allow the cylinder to rotate at the same time in the shear plane.

SUMMARY OF THE INVENTION

The known drawbacks of the lock cylinders are eliminated by the lock cylinder according to the invention, consisting of a lock cylinder body in which the holes accommodate spring-loaded locking pins and a cylinder in the holes of which the tumblers adjoin the locking pins and extend laterally into the key hole in the cylinder. . The principle of the invention consists in that in at least one, preferably in the first opening formed in the lock cylinder body for the locking pin, a first locking pin is arranged, adjoining the tumbler located in the tumbler hole in the cylinder of the lock cylinder. The first locking pin together with the tumbler adjoining it has a length equal to the sum of the depth of the first opening in the lock cylinder body with the length of the adjacent tumbler opening in the lock cylinder and the difference between the width of the key hole and the width of the key.

The key for operating the lock cylinder has codes on its side work surface designed to abut the tumbler faces. The codes have their contact surfaces interconnected by a track. The codes having the basic shape of the pits are modified by way of the path such that part of the inner conical faces of the codes is removed. The width of the key leading surface is equal to the sum of the depth of the first hole in the lock cylinder body, the length of the adjacent tumbler hole in the lock cylinder and the width of the key hole after subtracting the sum of the lengths of the first locking pin in the first hole in the lock cylinder body and its tumbler.

An advantage of the invention is that when the key is inserted into the key hole in the cylinder, the spring resistance is overcome, the tumbler in the cylinder lock cylinder is depressed and the first locking pin in the first hole in the cylinder lock body is pressed all the way. The key can be inserted into the keyhole because the lead-in surface of the key is smaller than the transverse dimension of the keyhole, allowing the key to slide into the keyhole along the taper head cone and the track formed between the codes at any of its points does not exceed the lead-in plane. The contact surface between the first locking pin and the tumbler is positioned exactly between the cylinder and the cylinder lock body.

Upon complete insertion of the key, the variation curve of the key, i.e. the bearing surfaces of the key codes associated with the track, adjusts the relative position of the other tumblers and locking pins so that their contact surfaces are exactly in line between the cylinder and the cylinder lock body.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 shows the lock cylinder in the basic position, with the key inserted and the separation plane between the cylinder and the lock cylinder body released. The removed inner conical faces of the codes are represented by a thin line.

FIG. 2 shows the lock cylinder, with the key partially inserted, with the leading surface of the key passing along the taper of the tumbler. The separation plane between the cylinder and the lock cylinder body is blocked.

FIG. 3 shows the key of the lock cylinder. The key has codes on its side work surface designed for contacting tumbler faces. The codes have their contact surfaces interconnected by a track. Removed inner conical faces of the codes are represented by a thin line. Compared to the transverse dimension of the key hole, the dimension of the key is reduced, which is also shown by a thinner solid water line 25.

Exemplary embodiment

An embodiment of the invention can be seen from FIGS. 1 to 3. In the first opening 6 formed in the lock body 2, there is a first spring pin 8 spring-loaded. The tumbler 4 is located in the first hole 5 in the cylinder 6. In the other holes formed in one plane in the cylinder 6, the tumblers 15 are arranged in the same number and at the same spacing as the locking pins 4. The sum of the length of the first locking pin 3 and the length of the tumbler 4 adjacent to it exceeds the sum of the depth of the first bore 1 and the length of the connecting bore 5 by 0.3 mm. the dimension of the key 9, i.e. the width of its leading surface £ 3.

The cylinder 6 is actuated by a flat key 9 with linearly formed codes 90, on the side surface of the key 9. The codes 10 are formed as dimples by the same rotary cutting tool as the tracks 12 that connect the abutment surfaces 90, codes 90. This removes the inner conical faces of the codes 40 shown in FIG. 1 and FIG. 3 in a thin line. The width of the leading surface 43 of the key 9 is smaller than the width of the key hole 7, allowing the key 9 to slide into the key hole 7 along the front cone of the tumbler 4. The track 72 does not exceed the plane of the leading surface £ 3. it does not prevent the key 9 from being inserted into the keyhole 7 along the front cone of the tumbler 4. Throughout the entire working path of the key 9, from the first code 10 to the end of the lead-in surface 13, the key 9 dimension is reduced. Shown in thinner solid line in Fig. 3.

Fig. 2 shows the insertion of the key 9 into the key hole 7 in the cylinder 6 to a position where the leading surface 13, by being dimensionally adapted, allows a tight sliding movement of the key 9 into the key hole 7. The resistance of the spring 8 is overcome and the first locking pin 3 to the bottom of the first opening 1. As the key 9 is further moved, the tumblers 15 are pushed against the locking pins 44 and the springs 8 until the codes 10 are positioned against the tumbler 4 and the corresponding tumblers.

-2GB ÓUU / ÓI BÓ and all tumblers touch the contact surfaces JJ. The contact surface between the tumbler 4 and the locking pin 3 and the contact surfaces between the tumbler 15 and the locking pins 14 at this time coincide with the dividing plane between the lock cylinder body 2 and the cylinder 6 can be rotated. This is illustrated in Fig. 1.

When attempting to rotate the cylinder 6 described by the SG method, the effect occurs as follows. If a tool of the same type of key of the same size as the key hole 7 is used to make the tool, the tool will not pass into the key hole 7 through the taper of the tumbler 4. The tool must therefore be further machined to a dimension permitting this passage. This reduces the lead-in surfaces for all tool codes and the SG effect can no longer be achieved. If a tool of the same type with the codes already created should be used to produce the tool, so that the codes should be deepened to the deepest code, it cannot be done - keys of the same type no longer have material to create lead-in surfaces of the tool codes, which could bounce tumblers 4 and 15 on impact.

Claims (1)

PATENT CLAIMS Lock cylinder comprising a lock cylinder body (2) in which holes (1) are received and springs (8) spring-loaded first locking pin (3) and locking pins (14) and a cylinder (6) in which holes (5) a tumbler (4) and tumblers (15) are disposed following the first locking pin (3) and the locking pins (14), wherein the tumbler (4) and the tumblers (15) extend into the 25 of a key hole (7) in a cylinder (6), characterized in that the first locking pin (3) has a tumbler (4) adjacent thereto at least in one, preferably a first hole (1) in the body (2) a length equal to the sum of the depth of the first bore (1), the length of the adjacent bore (5), and the difference between the width of the keyhole (7) and the width of the leading surface (13) of the key (9). 2. A key (9) having codes (10) formed on its side work surface for engaging the tumbler faces (4), characterized in that the codes (10) have their bearing surfaces (11) connected by a track (12), wherein the width of the leading surface (13) of the key (9) is equal to the difference between the sum of the depth of the first hole (1), the length of the adjacent hole (5), the width of the key hole (7) and the sum of the length of the first locking pin (3) in the first hole ) and the length of the adjacent tumbler (4).