LT5893B - Lock and key - Google Patents

Abstract

Lock and key, where the lock has two coaxial locking cylinders (1), each cylinder pivoted in its own housing (2), between which is the axially pivoted operating cam (5) of the lock. The arched radial grooves (12), arranged lengthwise along the cylindrical body of the cylinder (1), contain at least one row of spring-loaded crescent-shaped discs (11), which are slide-guided in these radial grooves(12) by means of their protrusions (13) located on the outer side of each lamella (11) and reaching into the inner radial grooves (20) in the housing (2), where these protrusions (13) are angularly set off from each other and cooperate with the axial grooves (14) in the inner cylindrical surface of the housing (2). The number and angular offset of the axial grooves (14) corresponds to the angularoffset of the protrusions (13); the shift of the protrusions (13) of individual discs (11) into the corresponding axial groove (14) is operated by the first coding (15), created on one side of the ridge or in the corresponding lateral side of the flat key (7) of the lock, into which the lamella (11) is flexibly pushed after the insertion of the key (7) into the lock. To prevent the turning of thecylinder (1) after the insertion of an authorised flat key (7), a limiting pin is inserted in the cylinder (1) in the area of the inner end of this cylinder (1); the outer protruding part of the limiting pin (21) is arranged to slide in the longitudinal groove (22), created in the housing (2), which, in the direction towards the operating cam (5), passes into the radial groove (23) of the housing(2). In the functional position after the insertion of an authorised flat key (7), in which all discs (11) are turned so that their outer protrusions (13) match the longitudinal axial grooves (14), and then after pushing the cylinder (1) into the lock by the effect of the stop part (26) of the shank of the flat key (7), the limiting pin (21) of the axial shift of the cylinder (1) is situated.

Description

TECHNICAL FIELD

The present invention relates to a lock construction with two coaxial locking cylinders and a key for operating the lock.

TECHNICAL LEVEL

Currently, designs of cylindrical locks with flat keys are known (see EP 0211602), in which the first combination on the narrower side of the key controls the adjusting pins which are arranged in a longitudinal plane of the key channel in the rotating cylinder. This channel works in conjunction with the spring-loaded locking pins located in the lock body. At the same time, the second combination on the other side of the key controls the crescent-shaped discs that slide against the return spring force into the curved grooves on the circumference of the rotating cylinder. These discs operate in conjunction with a longitudinal locking bar, formed radially and retracted into the barrel, and in an extended locking position that engages with a longitudinal locking groove within the cylinder housing of the lock body. While such designs provide a relatively high number of combinations, they do not eliminate the possibility of unlocking the lock illegally by using the dynamic method (cylindrical core punching method), whereby pins and locking pins are shaken by key applicator blows to create a dividing plane and rotate cylinder. An improved cylindrical lock arrangement, more robust dynamic locking, is described in the CZ utility model 20509. Improvement has been achieved due to certain crescent-shaped discs (pins) and their interaction with the cylinder and housing walls including the longitudinal locking bar. However, reliable operation of the lock coupling is adversely affected by increased wear on the key end. The key end, after it is inserted into the cylinder, rests directly on the stop surface of the coupling body and pushes the coupling into the lock cam.

THE SUBSTANCE OF THE INVENTION

The present invention relates to a lock and a key in which the lock comprises two coaxial locking cylinders, each of which rotates about its axis in its housing. There is a control cam mounted on the axle between the cylinders, both housings interconnected

-2 at the bottom of the connector. Also, both cylinders are connected by safety links and each lock has a sleeve which is mounted at the same time on the axis of rotation of the master cam housing, whereby the body slides but does not rotate against the master cam. It is an object of the present invention that the curved radial grooves disposed along a cylindrical cylindrical body have at least one row of spring-shaped crescent discs which slide into these radial grooves with protrusions located on the outside of each plate and extending into the inner radial grooves in the housing. In the housing, these projections are inclined at an angle to each other and cooperate with axial grooves on the inner cylindrical surface of the housing. The number of axial grooves and the angular deviation correspond to the number of protrusions and angular deviation. The displacement of the protrusions of the individual discs into the respective axial groove is controlled by the first combination, which is created on one side or on the respective side of the lock flat key, into which the plate is flexibly inserted after the key is inserted into the lock. To prevent the cylinder from rotating after inserting a legitimate flat key, a stopper pin is inserted into the cylinder, into the inner end region; the outer protruding portion of the limiting pin being disposed so as to fit into a longitudinal groove formed in the housing which intersects the radial housing groove in the direction of the guide cam. In the functional position, by inserting a legal flat wrench where all discs are rotated so that their outward projections correspond to longitudinal axial grooves, and after the cylinder is pushed into the lock by the flat key stem retaining part, the cylinder axial displacement limiting pin will appear position and this will allow further rotation of the cylinder in the housing.

The design of the lock according to the present invention helps to eliminate the problem of unauthorized lock unlocking using the dynamic method (core punching) described above. Contrary to the classic cylinder design, where the coupling is activated (coupling coupling with lock control cam) by sliding the key here, the coupling is only activated after a lateral axial displacement of the lock when the lock is actuated by the right-hand brake stop. Thus, contrary to, for example, motor vehicle switch locks, reliable coupling performance is not affected by key tip wear.

-3In an alternative design of this lock, the radial grooves of the cylindrical body of the cylindrical body have two rows of sliding spring-loaded discs. The projections are disposed opposite to each other and act in conjunction with the axial grooves on the inner cylindrical surface of the housing; the disks in each row are controlled by an appropriate first or second key combination, which is also created on either side of the key edge or on the side of the key. This increases the number of combinations and the reliability of the lock.

The axial displacement of the cylinder in the lock acts against the pressure of the spring of the cylinder against the other end of the cylinder against the edge of the cam of the lock. This facilitates cylinder operation.

In one of the possible lock designs, the inner end surface of the cylinder has a transverse recess which has a sliding, plate-like sleeve body continuously sliding into the leading cam edge. rear axial position.

In another embodiment of this lock, the upper ends of the radial shafts arranged in a row lead to a key channel in the cylinder. The radial shafts have sliding adjusting pins, the upper ends of which work in combination with the third combination, which is created on the lower narrow side of the flat key, and the upper surfaces of the locking pins descend to the lower ends of the pins. The locking pins with springs are located in the housing holes, in the same axis with the corresponding cylinder shafts, in the cylinder locked position.

This classic lock accessory enhances the number and combination of combinations.

The present invention also encompasses a flat key comprising a head, a widened transition member, and a stalk, wherein at least one and both lateral surfaces, or both sides of the stalk, are provided with a first or second combination and a lower underside of the key of which the locks for controlling structures are described above. This key

The braking portion comprises a plurality of selected surfaces acting individually or in combination, the lower surface of the transverse extension portion, at least one laterally extending lateral protrusion located at or at the surface of the extended transition portion.

The lock cylinder is unlocked in three steps: key insertion; additional movement for insertion of the entire cylinder when the key is inserted into the housing; turning the cylinder by turning the inserted key.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings (Fig.) Illustrate embodiments of the invention. Figure 1 is an axonometric view of a disassembled lock, showing two coaxial locking cylinders disposed in the respective housings, which are provided with the cam controlling the lock. The cam is controlled by the action of the key on the coupling.

Figure 1 is an enlarged, sectional view of one of the lock cylinders. The cylinder shown is in the inactive position before inserting the key with the second combination edge groove, with axial grooves spaced angularly apart on the cylindrical inner surface of the lock body. Here, in the lock body, the protrusions of the crescent-shaped discs are pushed from the axial groove area to the cylindrical inner surface.

the drawing shows a vertical cross-section of one of the lock cylinders. According to Figure 2, after inserting a key with a groove groove for the second combination, with axial grooves spaced angularly apart on the cylindrical inner surface of the lock body. Here, in the lock body, the protrusions of one row of crescent-shaped discs are pushed by springs into these axial grooves. Figure 4 shows an arrangement according to Figure 3, after inserting a key with a groove groove and a side groove for a second / third combination in which protruding protrusions of two rows of crescent-shaped discs are pushed against the inner cylindrical surfaces of the lock body . In Figure 5 and Figure 6

Figure -5 shows a 3D view of the lock cylinder from the front outer side and the opposite inner side.

Figure 3A shows a key for operating this lock having a side groove corresponding to the design shown in Figure 3. Figure 8 shows a wrench with ribs and side grooves corresponding to the design shown in Figure 4.

the drawing is a vertical longitudinal section of the lock portion with the rear active cylinder region. Active cylinder with key inserted in functional position before cylinder displacement, when coupling is not yet engaged with active cam. Figure 10 is a horizontal sectional view of the lock section in the plane leading to the cylinder axis according to Figure 9.

Figure 9 is a plan view of the layout (functional position before the cylinder is pushed into the lock) of Figure 9 and Figure 10. Figure 12 corresponds to Figure 11 and depicts the position of the lock in a functional position with a cylinder retracted into the lock body when the lock sleeve is in a recess of the lock guide cam to which it is engaged. Figure 13 is a rotational view of the part according to Figure 12, Figure 14 is a vertical sectional view of the lock area according to Figure 13. Figure 15 shows the lock in a vertical longitudinal section.

Figures 2 and 17 show two examples of the design of the key stop part. The key-stop part is designed to transfer axial force to the lock cylinder. Also transfer torque after the cylinder is pushed to the end position of the lock body and the coupling is engaged with the operating cam.

and Fig. 19 are 3D views of the disassembled lock portion. The example shows a row of discs whose offset is controlled by the combination created in the flat key side cut.

-6MOST IMPLEMENTING OPTIONS

According to the invention, the lock comprises two coaxial locking cylinders i with a key channel 6 for a flat key 7 and each cylinder rotates about its axis in its housing 2, both housings being connected by a connecting part 3 at the bottom. in order for the lock to function, they have a coupling 4 which slides but does not rotate in the axis of rotation of the body of the control cam 5, which is provided between the two cylinders. the upper end of the radial shafts arranged in a row in which the adjusting pins 8 are sliding leads to the key channel 6. The upper ends of the adjusting pins 8 cooperate with the third combination 9, which is formed on the lower narrow side of the flat key 7, and the upper surfaces of the locking pins 10 descend to the lower ends of the pins 8. The locking pins 10 with the springs are provided in the holes 2 of the housing 2, in the common axis with the corresponding shafts of the cylinder 1, in the functional locked position of the cylinder 1.

To increase the number of combinations, the lower row of pins (adjusting pins 8) and the locking pins 10 are supplemented by the 11th row of discs. The discs U. individually slide into the curved radial grooves 12 of the cylindrical body 12. The discs are crescent-shaped and always have two angular projections 13 on their outer side which cooperate with the axial grooves 14 on the inner cylindrical surface 2 of the body (Figures 2 and 3). The angular deviation of these axial grooves 14 coincides with that of the crescent-shaped discs. the angular deviation of the external projections 13. The outer curved sides of the discs 11 rest against the wall of the cylindrical cavity of the housing 2, the inner curved side of each plate H being guided through the bottom of the respective curved radial groove 12. The plate displacement JM is controlled by the first combination 15, which is created on the side of the flat key stem 7. one end of the crescent-shaped plate U is pushed into the flat key 7 by the plate spring 16 (one of the outer projections 13 appears at its opposite end). This spring 16 is provided in the recess 17 of the cylinder 1 and its outer end is supported by a projection 18 on the inner circumference of the plate U.

In order to increase the number of lock combinations (plate closures), said row of discs 11, whose discs slide separately into the curved radial grooves 12 in the cylindrical body 12 of the cylinder 1, can be formed in both cylinders 1.

-7 sides (Figure 4). The displacement JI of the discs on the other side of the cylinder 1 is controlled by a second combination 19 formed on the side of the flat wrench 7 (on the opposite side of the wrench 7 of the flat wrench).

If the unlocking of a conventional cylinder takes place in two steps, for example, by inserting a key and turning the cylinder when a torque is applied to the inserted key, the design of the present invention requires additional movement by which the entire cylinder is inserted into the housing. When a legal key is inserted and a dividing plane is created between the pins (adjusting pins 8) and the locking pins 10 (radial shafts) in all the holes, the cylinder is displaced (by axial force on the stop part of the key 7) to a position in the housing 2 for the inserted key 7, the cylinder i could be rotated. In this position, individual disks JJ. rotates in respective curved radial grooves 12 to a position where, when the key shank edges or side projections (first or second combination 15, 19) are engaged, their outer projections 13 fall into respective axial grooves J4 located on the inner cylindrical surface 2 of the housing. The cylinder 1 is then pushed with the brake part of the key 7 in action. It is only when the cylinder 1 is inserted into the lock that the sleeve 4 is pushed into the guide cam 5 (into its rib groove) and, with the subsequent rotation of the cylinder 1, the master cam 5 also rotates.

Thus, in order to make axial movement of the cylinder i with the key inserted towards the guide cam 5, it is necessary to move the pins to a position where all the locking pins JI are fully inserted into the housing 2 of the cylinder I (creating a dividing plane). , all the crescent-shaped discs JI are rotated such that their outer projections J3, which reach the inner radial grooves 20 of the housing 2, correspond to the axial grooves J4 on the inner cylindrical surface of the housing 2. The inner radial grooves 20 in the housing 2 are twice as large as the almost curved radial grooves J2 in the cylindrical housing J.

In order to prevent the cylinder 2 from turning when the legal key 7 is inserted, the cylinder i has a limiting pin 2J, the outwardly projecting portion of which slides in a longitudinal groove 22 in the housing 2.

-81 with key inserted 7 in the direction of axial movement of the cam 7. In the direction of the control cam 7, it enters the radial groove 23 of the housing 2, which allows the cylinder 1 to rotate the cylinder 1 after being pushed into the lock into a precisely defined axial position. In order to facilitate the operation of the lock, the cylinder 1_ may have a spring in its axial direction (the axial movement of the cylinder will act against the pressure of the cylinder spring 27 and the other end will rest on the edge of the locking cam 5). The inner end surface of the cylinder i has a transverse recess 24 which has a sliding, plate-like sleeve body 4, which is pushed continuously by the two sleeve body springs 28 into the edge of the locking cam 5. The lock has a notch for moving the sleeve 4 when it engages the guide cam 5. The cylinder opening in the region of the inner end of the cylinder 1 has an extension stopper pin 25 of the sleeve 4. The plate-like sleeve body 4 has a longitudinal slot open in the rib direction. the coupling 4 extension stop pin 25 delimiting the end axial position of the coupling reaches this notch.

As described above, the lock cylinder 1 is unlocked in three steps: key insertion; additional movement for insertion of the entire cylinder 1 with the key inserted into the housing 2; turning the cylinder by turning the inserted key. The axial force exerted upon insertion of the cylinder 1 with the key inserted into the housing 2 is exerted by the retaining portion 26 of the stem 7 of the key 7, which may consist of a lower surface of a widened transition portion at least one laterally extended lateral protrusion on the surface of the transition part, or a combination thereof.

The lock according to the present invention has a large number of possible combinations and is significantly more resistant to unauthorized unlocking when using the dynamic method (cylindrical core punching method).

List of links

... cylinder

... casing

... the connecting part

-94 ... coupling

... the ruling fist

... the key channel

... the key

... adjusting pins

... the third combination

... locking pins

... discs

... curved radial grooves

... external discs protrusions

... axial grooves on the inner cylindrical surface of the housing

... the first combination

... plate spring

... a notch

... protrusion

... the second combination

... internal radial grooves in the housing

... limiting pin

... longitudinal groove in housing

... radial groove in housing

... cylinder cross-cut

... coupling limiter pin

... the locking part of the key

... cylinder spring

... coupling body spring

Claims (7)

DEFINITION OF INVENTION 1. A lock and a key having a lock having two coaxial locking cylinders (1), each cylinder rotating about its axis in its housing (2), the lower part being joined by a connecting part (3), the two cylinders (1) being held together the joints and each cylinder having a customized sleeve (4) for controlling the lock which slides but does not rotate about an axis opposite the guide cam (5) in the axis of rotation of the body of this guide cam (5), characterized by curved radial grooves (12). arranged along the cylindrical body of the barrel (1), have at least one row of spring-shaped crescent discs (11) which slide into these radial grooves (20) due to protrusions (13) on the outer surface of each plate (11) the grooves (20) in the housing (2), where these projections (13) are angled with respect to each other and cooperate with axial grooves (14) on the inner cylindrical surface of the housing (2), wherein in the housing (2) a certain number of axial grooves and angular displacement correspond to a certain number of protrusions (13) and displacements (13) of the individual discs (11) is guided into the respective axial groove by a first combination (15) formed on one side or the corresponding side of the flat key (7) into which the plate (11) is flexibly pushed after inserting the key (7) to prevented from rotating the cylinder (1) after inserting the legal flat key (7), inserting the stop pin (21) into the cylinder (1), the outer protruding portion of the stop pin (21) slides in the longitudinal groove (21). 22), which is formed in the housing (2), which, in the direction of the guide cam (5), enters the radial groove (23) of the housing (2), and where in the functional position, and inserting a legal flat key (7) in which all discs (11) are turned so that their outer projections (13) correspond to longitudinal axial grooves (14), and then after the action of the flat key (7) for the braking part, the cylinder (1) is pushed into the lock, the stop pin (21) of the cylinder shaft shims in the axial position set in the radial groove (23) of the housing (2) and the cylinder (1) in the housing (2) can be rotated. 2. The lock and key according to claim 1, characterized in that the radial grooves (12) of the cylindrical body of the cylinder (1) have two rows. - 11 sliding spring discs (11) with protrusions (13) disposed opposite to each other and cooperating with axial grooves (14) on the inner cylindrical surface of the housing (2), the disks (12) in each row being controlled by the first or second respectively; a combination (1519) of the inserted key (7), which is also provided on both sides of the key (7) or on the sides of the key. 3. The lock and key according to claim 1 or 2, characterized in that the axial displacement of the cylinder (1) acts against the pressure of the spring (27) on the cylinder where the other side of the cylinder is supported by the edge of the cam. Lock and key according to one of Claims 1 to 3, characterized in that the inner end surface of the barrel (1) has a transverse recess (24) which has a sliding, plate-like sleeve (4) body continuously pushed against the guide cam (5). ) having a longitudinal recess open in the direction of the edge of the guide cam (5), where the extension stop stopper pin (25) of the sleeve (4) reaches this notch and delimits the end axial position of the sleeve (4). 5. The lock and key according to one of claims 1 to 4, characterized in that the key channel (6) in the cylinder (1) is guided by the upper ends of the radial shafts arranged in a row with sliding adjusting pins (8) having upper ends. cooperates with a third combination (9) formed on the lower underside of the flat key (7) and lowering the upper surfaces of the locking pins (10) to the lower ends of the pins, where the locking pins (10) with springs are provided in the in the axle with the corresponding shafts of the cylinder (1) in the function locked position of the cylinder (1). A flat key comprising a head, an extended passage, and a stalk, wherein at least one of the lateral surfaces of either side of the stalk or both sides is adapted for the first or second combination (15,19) to operate the lock according to one of the claims. from 1 to 4, characterized in that its stopping part (26) is formed by a group of selected means acting individually or in combination, the lower surface of the transverse extension portion, at least one of -12 lateral extended lateral protrusion at or at the surface of this extended transition. A flat key comprising a head, an extended passage, and a stalk, wherein at least one of the lateral surfaces of either side of the stalk or both sides is adapted for the first or second combination (15, 19) and the lower north side of the key is adapted for the third combination. ) for controlling the lock according to one of claims 1 to 5, characterized in that its locking part (26) consists of a lower surface of the transitional extension part of the selected means acting individually or in combination, at least one laterally extended lateral protrusion , located on the surface of this extended transition or on the surface of the extended transition.