CZ2014214A3 - Lock and key - Google Patents

Abstract

A lock and key, wherein the lock has at least one lock cylinder (1) rotatably mounted in its housing (2), which at its inner end is provided with an outer radial groove (15) with an interlocking member for axially securing the cylinder insert ( 1) in the body of the lock housing (2), wherein the shank (4) of the flat key (7) for actuating the lock has cutouts on one of its edges for engaging and positioning the lock tumblers V in the area between the outer radial groove (15) and the face (12) the insert is a cylindrical insert (1) provided with a further radial groove (9) for the locking member (3) housed in the cylindrical insert body (1), which forms the inner stop of the shank (4) into the key lock (7), where the housing (2) The lock is provided with a recess (17) opposite the locking member (3), whose shape and depth correspond to the shape and thickness of the locking member (3). An integral part of the locking member (3) is at least one pin (14) which, depending on the position of the key lock (7), is freely seated in the opening (4) in the rotational lock position of the cylindrical insert (1) in the lock housing (2). 18) of the lock housing (2) over the dividing surface between the cylindrical insert (1) and the housing body (2), and extended from the opening (18) towards the cylindrical insert body (1) in the release position of the locked dividing surface by the movement of the locking member (3) when lifted by the leading edge of the key (7).

Description

It is an object of the present invention to provide a lock with at least one locking cylinder and keys to operate the lock.

BACKGROUND OF THE INVENTION

Known embodiments of the cylinder lock key are typically supported by a projection in the lower or side edge of the key shank in its transition portion facing the key head on the face of the rotatable lock cylinder, thereby defining the position of the closure formed at the lower edge of the key shank and tumbler bores; the locking pins in the insert and in the lock housing body. This arrangement requires relatively precise machining of the insert face, which may affect the function of the lock. In other embodiments, the protrusion in the region of the flat key tip rests on a fixed stop that is fixed in the recess of the lock cylinder at its inner end, see, for example, US Patents 3298211, 5176015/5507163 and 6079240, British Patents T81429, 2361505 and ^; 2413152 or European Pat.

European patent EP 0237172 (or analogous document DE3603687) describes a lock and key arrangement with an outer stop on the face of the cylinder insert, where a pin with a side projection is loosely inserted into the side opening of the insert. This protrusion extends into a longitudinal groove formed in the wide side of the key shaft and, depending on the position of the key shank being inserted, this pin extends from the lower part of the lock body into the insert body by releasing a separating surface between the lock body and the insert. that can rotate and operate the lock tumblers. The disadvantage is the reduced strength of the stressed front part of the key shank in which the grooves are formed on both lateral wider sides. Also, the production of such a key is more complicated, requiring special costly production equipment to create double-sided grooves.

CZ patent 303220 and utility model 21303 disclose lock systems and keys for its operation, wherein in the longitudinal axis of the insert there is a variable location of the inner or outer

- 2 key stop, which allows a higher level of control of key production and increased service life of the lock and key combination for its operation.

1 / of these two documents CZ303220 and CZ24303U, an arrangement of a lock and key assembly with a locking member inserted into the circumferential groove of the lock cylinder is described. This locking member serves only as a stop of the key shaft;

Known designs do not allow the stop member to be positioned at any point along the length of the lock cylinder and hence to control the lock with a different number of tumblers with a key where the distance between its stem and the tip of the key is constant for different numbers of tumbler slots. . This means that keys with the same trowel depth for tumblers can be operated with locks with a different number of tumblers. A weakened portion of the key shaft in its end region may also result in inaccurate key guidance in the insert, which, in prolonged use, may render the lock non-functional since the key does not have the desired vertical position. Another disadvantage is the reduced key lifetime, as the locking pins of the lock extend over the partition and mechanically abrade the insert, which may be the reason that these embodiments of the flat key and lock have not found wider application in the market.

It is an object of the present invention to make it difficult to use keys that are not authorized by the lock manufacturer and which in use can damage the lock cylinder. Another goal is to increase the level of security, distribution and combination capabilities of each key.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a lock and key system and a key to operate the lock. The lock has at least one locking cylinder rotatably mounted within its housing, which is provided at its inner end with an outer radial groove with an interlocking member therein for axially securing the position of the cylinder in the housing body, and wherein the shank of the flat

The keys for operating this lock have cut-outs on one of its edges to engage and align the lock tumblers. In the region between the outer radial groove and the face of the insert, the cylindrical insert is provided with another radial groove for the locking member, housed in the cylinder body, which forms the inner stop of the shank into the key lock. correspond to the shape and thickness of the segment of the locking member.

SUMMARY OF THE INVENTION An integral part of the locking member is at least one pin which, depending on the position of the key inserted, is in the operative position of blocking the rotation of the cylinder in the lock housing body loosely received in the lock housing opening over the partition and the housing body, and slid out of the opening into the cylinder body in the operative position of releasing the locked partition by actuating the locking member when lifted by the leading surface of the front of the key.

Compared to the prior art, the present solution according to the invention is simpler to manufacture, it is not necessary to create a special groove in the key shank (reducing its strength in the stressed part) to control the additional locking elements. The locking member is at the same time a stop member and it is thus possible to eliminate the outer stop at the bottom of the key head.

The locking member pin may have a circular or angular cross-section that extends from 4 'straight to a rounded portion adapted to be inserted into a radial groove of the cylindrical insert.

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The lower end of the locking pin member may be in the functional position of its insertion into _the opening of the lock housing over the dividing surface between the cylinder liner and the housing body / 1 advantageously at a distance of 0.74 to 1.44 mm from the parting surface and the contact stroke at front The side of the key with the locking member may be from 1.92 to 3.62 mm.

The front side of the flat shaft of the key may have at least one shaped notch or recess with a stop surface on the dorsal edge opposite the edge with the slots for engaging and aligning the tumblers of the lock. the tip of the key shank has a contoured angled or rounded lead-in surface to lift the locking member with the pin when in contact with the key inserted to unlock the separating surface between the cylindrical insert and the housing body.

The key is provided with at least one stop on the lock member selected from the group comprising an outer stop face of the insert head and / or bushing, a locking member, a liner retaining ring, a spacer ring, a control tooth, a clutch, a clutch pin and an extension. The key stop from the axis of any of the lock tumblers is a controlled variable. This means that several variants of the key stop from the axis of one of the lock tumblers can be used.

Clarification of drawings

BRIEF DESCRIPTION OF THE DRAWINGS Exemplary embodiments of the invention are shown in the accompanying drawings. FIG. 1 shows an embodiment of a flat key for a cylinder with a cylinder lock, wherein the keyhole has slots at one of its edges to engage and align the tumblers of the lock, and its opposite ridge has an upwardly open slot with a substantially perpendicular stop surface The front side of the shaped notch opens obliquely towards the tip of the key shank.

FIG. 2 is an axonometric view of a cylindrical insert with a flat key inserted according to the present invention, wherein the stop surface of the key at the upper edge of its shaft is supported by a locking member formed by a pin that passes into a rounded upper portion; located in the opening of the cylinder and the lock case with the possibility of extending towards the cylinder body in the functional position of releasing the partition that is blocked by it.

Fig. 3 is a detail of the front part of the key with a stop surface at the upper edge of its shank supported by the locking member. FIG. 4 shows the locking member in the cylindrical insert in the operative position, blocking the partition between the cylindrical insert and the lock housing. In Fig. 5, the locking member is in a position where it does not block the partition and the cylinder can rotate in the lock housing. Fig. 6 is a view of the cylinder lock secured against axial ejection from the lock housing; Fig. 7 is a rear view of the lock cylinder lock. FIG. 8 is a cross-sectional view of a lock with a locking member, wherein the locking member is in a functional position blocking the partition

FIG. 9 is a cross-sectional view of FIG. 8, with the locking member extended, without blocking the partition. FIG. 10 shows a cylindrical insert with radial grooves intended to receive a snap ring and a locking member. FIG. 11 illustrates, in cross-section and rear view, the stroke of the locking member shown in both the top and bottom positions. Figures 12 and 13 show two different embodiments of a lock according to the invention, wherein Figure 12 shows a lock with a short cylinder liner and Figure 13 with an extended cylinder liner.

FIG. 14 shows examples of different shapes of a locking member which in this embodiment of the invention simultaneously serves as a stop member.

FIG. 15 shows the outer face of a lock cylinder with a partially inserted key according to the present invention. A pin is pressed into the face of the insert with some play, which locks the first locking pin / tumbler lock when an unauthorized key hits a conventional key stop using the so-called dynamic bumping method and thus disables the lock function.

FIG. 16 shows examples of several embodiments of a key for operating the aforementioned lock; the tip of the key shank has a contoured angled or rounded lead-in surface to lift the locking member with the pin when in contact with the key inserted to unlock the partition between the cylinder liner and the housing body.

DETAILED DESCRIPTION OF THE INVENTION

The lock according to the invention has two coaxial locking cylinders 1 with a key channel for a flat key 7, each of which is rotatably mounted in its housing 2. Both of these housings 2 are connected to each other by a bridge (not shown). In addition, the cylinders 1 are further held together by locking rings 8 (Figs. 6 and 7) which prevent their axial ejection from the housing 2 and are fitted with a clutch 21 which is slidably but non-rotatably mounted relative to the lock cylinders 1. in the axis of rotation of the control tooth body 19 situated in the gap between the two inserts 1 (Figs. 12 and 13). The upper end of the radial manholes of the lock, arranged in succession, opens into the key channel of each insert. in which the tumblers 26 are slidably mounted, the upper ends of which cooperate with the coding provided on

The lower ends of the flat wrench 7, and whose lower ends abut the upper faces of the locking pins 27, which are supported spring-loaded in the bores of the sleeve 2, coaxial with the corresponding shafts in the insert 1 in the functional locked position of the insert 1 (Figs. 12 and 13).

Each cylindrical insert 1 is provided with an outer radial groove 15 (Fig. 10) on its end inner side, into which a locking ring 8 (Figs. 6 and 7) is inserted and secured against sliding, to axially secure the position of the cylindrical insert 1 in the body. lock housing 2. The projections 6 at both ends of the locking ring 8 engage (after insertion into the outer radial groove 15) in the transverse groove 5 in the inner end region of the cylindrical insert L (FIGS. 6 and 7).

The cylindrical insert 1 is further provided with a radial groove 9 with a rounded or flat bottom for receiving a blocking member 3, which is formed, for example, by a steel rounded or eye-closed piece which passes from below into a pin 14 (see FIG. 3). This pin 14, depending on the position of the key inserted 7, is in the functional position of blocking the rotation of the cylinder 1 in the body of the lock housing 2 loosely in the opening 18 of the lock housing 2 (Figs. 8, 9,11). a partition between the cylinder 1 and the housing body 2, and extended from the opening 18 towards the cylinder body 1 in the operative position of releasing the locked partition by moving the locking member 3 as it is lifted by the leading face 16 of the front key 7. the locking member 3 is shown in both its operative positions when the partition is locked and released. The pin 14 of the locking member 3 may have a circular or angular cross-section that extends from a straight to an upper rounded portion adapted to be inserted into a radial groove 9 of the cylinder liner 1 (Figs. 10 and 14). The lower end of the pin 14 of the locking member 3 is in the operative position of inserting it into the opening 18 of the lock housing 2 over the separating surface between the cylinder 1 and the housing 2 at a distance of preferably 0.74 to 1.44 mm from the separating surface. the contact of the front side of the key 7 with the locking member 3 is from 1.92 to 3.62 mm.

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The key shank 4 of the key Z is provided with a shaped notch or recess with a stop surface 11 on the front side of its upper dorsal edge opposite the notch edge for engaging and aligning the lock tumblers 26 (FIG. 1). If the key Z is not inserted into the lock, then the locking member 3 extends with its pin 14 into the opening 18 in the lock housing 2 (e.g. Figs. 4 and 8) and blocks the cylinder 1 against rotation (pin 14 of the locking member 3 engages in the opening 18 in the lock housing 2). After insertion of the key Z, the locking member 3 is raised by its inclined or rounded leading surface 16 in the front part of the key Z, thereby exposing the separating surface between the cylinder 1 and the lock housing 2 and turning the cylinder 1.

When the key Z is inserted into the lock cylinder 1, its inclined or rounded leading surface 16 on the tip slides over the lower surface of the upper part of the locking member 3, lifts it and then pushes it into the recesses 17 in the housing 2 (FIGS. 5 and 9). As soon as the key shank 4 is retracted to the position in which the notch in the key shank 4 is below the ring of the upper part of the locking member 3, the ring 4, respectively. the rounded upper part of the locking member 3 fits into this notch and the stop surface 11 in the upper edge of the key Z abuts against it (in this particular example, the locking member 3 simultaneously serves as a stop member). When pulling the key Z from the lock cylinder 1, the notch angled open towards the tip of the key shank (Fig. 1) acts to push the ring of the locking member 3 into the recess in the housing 2 and subsequently the key Z slides over the bottom surface of the locking member 3 until removed. keys from the insert. Fig. 16 shows examples of different shapes of leading surfaces 16 on the front parts of keys The locking member 3, housed in the cylinder insert body, forms the inner stop of the shaft into the lock of the inserted key. In contrast to the prior art, described e.g.

in DE3603687, CZ303220 and CZ24303, an integral part of the locking member 3 is a pin 14, which, depending on its position in the lock of the inserted key Z, is in the operative position of locking the cylinder 1 in the lock housing 2; between the cylindrical insert 1 and the housing body 2, and slid out of this opening toward the cylindrical body 9 of the insert 1 in the operative position of releasing the locked partition by moving the locking member 3 while lifting it with the front face of the key. The solution according to the invention is simpler to manufacture, it is not necessary to create a special groove in the key shank (reducing its strength in the stressed part) to control the additional locking elements. The locking member is at the same time a stop member and it is thus possible to eliminate the outer stop at the bottom of the key head.

The key 7 may be provided with at least one stop on the lock component selected from the group comprising the outer stop face of the face 12 of the cylinder head 24 and / or the housing 2, the locking member 3, the locking ring 8 of the cylinder 1, the spacer ring 20, the control tooth 19 21, the clutch pin 23, the clutch pad 22 (FIG. 12) and the extension piece 25. The distance of this stop from the axis of one of the lock tumblers 26 is a controlled variable. This means that several variant distances of the key stop Z from the axis of one of the tumblers 26 can be used.

FIG. 15 shows the outer face 12 of the lock cylinder 1 with the key partially retracted according to the present invention. A pin is pressed into the face 12 of the insert 1 with some play

13, which locks the first locking pin / tumbler lock when an unauthorized key hits a conventional key stop by the so-called dynamic bumping method and thus disables the lock function. This increases the mechanical resistance of the lock against its misuse, i.e., against its drilling and against the use of an unauthorized key with a conventionally shaped stop as a bumping applicator.

Industrial applicability

The present invention is applicable to locks with a cylindrical insert and a flat key.

-9List of Reference Marks

... cylindrical insert

... case

... locking member

... the keyhole

5vzv r | r knows

... transverse groove

... locking ring lugs

...key

... retaining ring

... groove for inserting the locking member

... an opening in the insert for receiving and guiding the locking member

11 ... stop surface on top of key shank

... the front of the insert

... pin

... locking member pin

... outer radial groove for snap ring insertion

... the leading surface of the key for operating the locking member

... a recess in the lock housing for the locking member

... a hole in the lock housing for the locking member pin

... control tooth

... spacer ring

21 ... clutch

... clutch pad

... pin under the clutch

24 ... insert head

... extension

... tumblers

... locking pins

Claims (5)

PATENT CLAIMS A lock and key, the lock having at least one locking cylinder (1) rotatably mounted in its housing (2), which is provided at its inner end with an outer radial groove (15) with an interlocking member for axially securing the position of the cylinder (1) in the body of the lock (2), wherein the shank (4) of the flat key (7) for operating the lock has cut-outs at one of its edges to engage and align the tumblers of the lock, and wherein in the region between the outer radial groove (15) and the cylinder face (12) is provided with a further radial groove (9) for the locking member (3) housed in the cylinder body (1), which forms the internal stop of the stem (4) into the lock of the inserted key (7), wherein the lock housing (2) has a recess (17) opposite the locking member (3), the shape and depth of which correspond to the shape and thickness of the locking member (3), characterized in that an integral part of the locking member (3) ) is at least one pin (14) which, depending on its position in the lock of the inserted key (7), is in the functional position of blocking the rotation of the cylinder (1) in the body of the lock housing (2) lock over the separating surface between the cylindrical liner (1) and the housing body (2), and slid out of the opening (18) towards the cylindrical liner body (1) in the operative position of releasing the locked separating surface by moving the locking member (3) the front face of the key (7). Lock and key according to claim 1, characterized in that the pin (14) of the locking member (3) has a circular or angular cross-section that extends from a straight to a rounded part adapted to be inserted into a radial groove (9) of the cylindrical insert (1). ). Lock and key according to claim 1 or 2, characterized in that the lower end of the pin (14) of the locking member (3) is in the operative position of its insertion into the opening (18) of the lock housing (2) over the separating surface between the cylinder. 1) and the housing body (2) at a distance of 0.74 to 1.44 mm from the partition and its stroke at contact of the front side of the key (7) with the locking member (3) is from 1.92 to 3.62 mm. Lock and key according to claim 1, characterized in that the front side of the flat shank (4) of the key (7) has at least one shaped notch or recess on the dorsal edge opposite the edge with the slots for engaging and aligning the tumblers. the front face respectively. the tip of the shank (4) of the key (7) has a contoured angled or rounded ramp (16) for lifting the locking member (3) with the pin (14) when it contacts the inserted key (7) to unlock the partition between the cylinder liner (1) and a housing body (2). Lock and key according to one of claims 1 to 4, characterized in that the key (7) is provided with at least one stop on the lock part selected from the group comprising the outer stop face of the face (12) of the head (24) of the insert (1). and / or bushings (2), locking member (3), locking ring (8) of cylinder liner (1), spacer ring (20), operating tooth (19), clutch (21), pin (23) under clutch, washer (22) below the coupling and extension piece (25), wherein the distance of this key stop (7) from the axis of any one of the lock tumblers (26) is a controlled variable.