FI92345B - Lock cylinder combination and key for it - Google Patents

Description

92345

Lock cylinder assembly and key for it -Läscylinderkombination och nyckel för den

The present invention relates to key-operated locks. Conventional locks comprise a lock cylinder mounted rotatably inside the lock body and provided with spring-loaded pins. The lock can be operated by a key that includes a key blade that works in conjunction with spring-loaded pins. Some lock cylinders include locking or side bars that can move radially inward when the pins are positioned correctly, allowing the cylinder to rotate to the unlocked position.

These conventional locks are prone to burglary and can be relatively easily "tipped" open. In addition, the number of possible combinations in connection with them is limited. The locksmith cylinder is complex in construction and thus expensive to manufacture, repair or modify, requiring locksmiths to keep a large number of parts in stock.

20

It is an object of the present invention to obviate or at least substantially alleviate some of the above disadvantages.

The present invention thus provides, according to one of its features, a lock cylinder assembly which operates by means of a key and is intended to be inserted inside a hollow lock body, said lock cylinder assembly comprising a hollow base having a longitudinal axis, at least one disc plate supported on this base and extending y-30 perpendicular to said axis, the disc plate or each of them including an opening for a key, a key fixing means adjacent to said opening that secures the key so as to be able to locate the disc plate or each of them in a predetermined position around the longitudinal axis without rotating at least one key, and 2 923 the locking bar operatively connected to the disc plate or to each of them and set to move radially with respect to the longitudinal axis from the external position to the internal position only in its j after the disc plate or each of them has been placed in a predetermined position by means of a key, the invention being characterized in that the disc plate or each of them includes a protrusion or pin for insertion into a slot, groove, hole or the like in the locking bar or in each of them .

According to another aspect of the present invention, there is provided a key for use in a lock cylinder assembly, said key comprising at least one longitudinal angular groove which receives the key fixing means.

The hollow lock body in which the lock cylinder assembly according to the invention can be placed can be selected from a wide range, whereby the combined lock cylinder assembly and the hollow lock body can be used as a cylinder lock, an eccentric lock, a furniture lock or an egg lock, among others. By means of the lock cylinder combination according to the invention, several different locking functions can be performed by simply changing the selection of the hollow lock body.

The lock cylinder assembly according to the invention is preferably intended to be rotatably inserted inside the hollow lock body in an unlocked state, whereby the locking rod SO or the movement of each of them to the inner position allows the lock cylinder assembly to rotate.

The number of disc discs in a combination can determine the range of possible combinations. It is most preferred to use two or 35 plates. For the sake of simplicity, an embodiment comprising several disc plates is described in this connection 11 92345 3. However, it is clear that only one disc can be used in connection with the invention.

5 The opening for setting the key is preferably placed centrally on each disc plate.

The key fixing means may be of any shape, preferably comprising one or two protrusions extending into the opening 10 of the disc plate.

For reasons of economy, it is desirable that only one locking bar be used in the combination according to the invention.

In a particularly preferred embodiment, both the locking bar and the key are cut according to the same "code" obtained from the computer program. However, for security reasons, the physical shapes of the locking bar and the key should be significantly different, so that they have no similarity even when placed side by side. This lack of physical similarity is possible due to the fact that the disc plates comprise a transfer or shaping means connecting the locking bar and the key. When the key is inserted inside the lock cylinder assembly and the key 23 arranges the disk plates in their predetermined position, these disk plates take a "code" from the key. This "code" is transferred unchanged to the locking bar, although the physical shape of the locking bar is different from that of the key.

3J0 Alternatively, a disc-shaped washer may be included in the lock cylinder assembly of the invention. Unlike the disc plates, which are rotatably supported inside the hollow base, this washer can remain in place until the locking pin is moved to the unlocked position, whereby the washer can be rotated together with the entire assembly.

The washer includes an opening which is preferably the same as the opening in the α-only profile, whereby the washer can act as a guide for the key and transfer the key rotation function to the whole combination. If desired, several washers can be included in the combination. The washers may also include small holes to prevent "tipping", as described below.

10

As mentioned above, the disc plates are supported by a rotatable base. Particularly when using washers, the support angle of the arc of rotation of the disc plates can be limited.

15

In a particularly preferred embodiment, the combination according to the invention comprises ten disc plates arranged in five pairs. A washer with a key profile hole is placed between each pair. The combination of the disc plate and the washer 20 is preferably held in place by a surface-hardened plug containing a key profile opening. (This plug can also prevent drilling of the lock cylinder assembly). This embodiment provides a lock combination that has good durability and includes 2 * 5 a large number of combination possibilities, as described below.

In this embodiment, the key fixing means comprises a protrusion or pin in each disc plate, the rotation of which SO is limited to 36 degrees. The predetermined position that the protrusion on each disc plate can assume can be selected from seven possible positions located at six-degree intervals in an arc of 36 degrees. With ten disc discs in use, there are more than 280 to 35 million combination options available. Disc discs can be

II

92345 5 The scissor loads so that the protrusion of the first disc plate (closest to the plug) can be located either to the right or to the left. This arrangement doubles the number of combinations in use.

5

The key according to the invention may have a circular cross-section or may contain removed parts to give it the required shape, for example a keyway. One desirable material for the key is nickel silver. The key may comprise a key blade using a lock combination and a key gripping head. The rest of this description refers to the key leaf as a key usage part.

When the key is cut from the cylinder with the parts removed, the cross-section of the key blade resembling a keyway, the upper part of this cross-sectional profile is preferably between 140 and 160 degrees, the diameter of the key blade being 7 to 8 mm. The beginning of the key blade may be sharp and extend at another leading angle to the point where all cuts begin or end.

A groove or slit can be machined in the key blade, preferably at an angle according to the computer program.

In this embodiment, cutting the key includes machining a groove or slit in the cylindrical portion. This groove can be cut with a specially made disposable slotted drill with a beveled cutting edge. The groove is cut longitudinally inside the key blade as it changes its radial direction radially as the cutting operation progresses. The cutting unit must always »be pointed towards the center of the key blade.

A cut key magazine can contain more than one career. For example, two grooves may be used, each groove 35 being set to align half of the disc plates. The first 6 92345 groove begins at the tip of the key and changes direction Tenth time before arriving at the end of the key leaf near the tip of the key. The groove may end there or continue over the tip of the key blade to form a second groove that returns to the end of the 5 keys, again changing direction up to twelve times before entering the end of the key.

When the key blade is inserted into the lock assembly roll according to the invention, the key fixing means (e.g. a protrusion piercing the hole of each disc plate 10) is subjected to programmed gradual changes of direction in the groove and the disc plates rotate accordingly. The position of the groove in the key blade, the number and direction of changes in direction and the number of grooves per key plate can be varied, resulting in a very large number of possible key profiles.

It should be noted that the key of the present invention can be made so that it does not contain sharp points or protrusions, and thus does not scratch or tear clothing, as is the case with many of the keys currently in use.

As mentioned above, the locking bar has two positions. In the first, i.e. external, position, the locking is preferably held-2Γ5 in the groove in the hollow lock body, and when the locking bar is in this position, the lock cannot be opened. The locking bar is held in this position by external projections or pins on the disc plates.

3.0 When the correct key is inserted into the lock cylinder assembly, the disc plates shall be rotated so that these external protrusions or pins are aligned with the slots, grooves, holes or the like in the locking bar. By turning the key, the locking bar is pushed into the groove-35 in the hollow lock body and comes into contact with these protrusions or pins <·

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92345 with 7. In this way, the lock cylinder assembly can be rotated to allow it to be opened.

When the protrusions or pins come into contact with the slots, grooves or grooves of the locking bars 5, the key cannot be withdrawn from the lock cylinder assembly until the locking bar has returned to its groove in the hollow lock body. The spring moves the locking bar to the external position, whereby the continuous rotation of the key is interrupted by the fall of the spring-loaded locking bar back into the groove when the bar is in line with it, which indicates a position in which the key can be pulled out. When the key is pulled out, it "modifies" the disc plates as they gradually move at certain angles in the groove or grooves.

15

The locking bar is preferably made of brass or nickel skin and may include slots or grooves extending longitudinally as well as radially. Alternatively, as described above, the holes may be drilled in the locking bar.

20 Holes are preferably drilled as blind holes. It is even more desirable to drill additional lower holes - usually per 3 or 4 locking bars - to prevent tipping. GRAD These shallow holes are not able to come into contact with the protrusions on the disc plates.

25

If desired, the locking bar can be provided with a combination of slots, grooves and / or holes.

In the case of a main locking system, the locking bar may include a large number of usable slots, grooves and / or holes.

It is clear that the locking bar is an important feature of the present invention. It gives the lock 35 according to the invention a very high degree of flexibility and security. In addition, the use of a locking bar instead of the wedge pins used in previously known locks allows a quick and economical change to be made. In this case, all that is required is to form a new key / locking bar combination and replace the old locking bar with a new one. When a skilled locksmith is needed to change a combination of previously known locks, an ordinary convenient person will be able to change the locking bar in connection with the lock cylinder assembly of the present invention.

10

If desired, the cover plate can be included in the lock cylinder assembly for each locking bar, so that the "code" of the grooves, slots or holes cannot be detected, for example by means of an internal hyster.

15

Preferred embodiments of the present invention will now be described, by way of example, with reference to the accompanying drawings, in which: Figure 1 is an exploded isometric view of a lock assembly according to the invention;

Fig. 2 shows a perspective view of a key blade that can be used in connection with the lock assembly of Fig. 1;

Figure 3 shows a longitudinal sectional view of the lock assembly of Figure 1 in an assembled form and including a hollow lock body; 30

Figures 4A to 4E show a cross-section (hollow lock body size) of the lock assembly of Figure 1 during use, with Figure 4A showing the locked position. Figure 4B shows the lock with the key inserted therein. In Fig. 4C 35 the lock is in the unlocked position, in Fig. 4D the blade of the lock cylinder 92345 9 is rotated to the initial position, and Fig. 4E again shows the locked position; and

Figure 5 prevents an alternative solution that prevents "tiering".

Referring to Figures 1, 2 and 3, there is shown a lock assembly 10 operated by a key containing a key blade 11.

The lock assembly 10 is intended to be inserted into a hollow lock body 15 (see Figures 3 and 4A to 4E). A longitudinal groove 14 is made in the inner surface of the lock body 15.

The assembly 10 is generally cylindrical in shape and includes a base portion 16 which is C-shaped in cross-section and the outer surface of which slidably engages the inner surface of the lock body 15. A locking rod 27 is placed between the arms of the base part 16. In the locked position, the locking rod 27 is placed in the groove 14. The spring 23 moves the locking rod 20 27 to the external position.

Five pairs of disc plates 17 are slidably placed in the base 16, separated by washers 18. Each disc plate 17 is thyroid-shaped to form a central passage 19.

The washer 18 is also thyroid-shaped and forms a passage 20. The disc plates 17 and washer 18 extend generally in a transverse direction with respect to the longitudinal axis 28 of the lock assembly. The shape of the bus 20 generally corresponds to the transverse shape of the key blade 11.

30

Extending inside each passage 19 is a mounting protrusion 21 for insertion into a slot or groove 22 in the key blade 11. The radially outer peripheral surface of each disc plate 17 is provided with a protrusion 24 for insertion 35 into holes 25 in the locking bar 17. The disc plates 17 92345 10 and washers 18 also have additional protrusions 26 for attachment to the respective surfaces of the base portion 16 to assist in the rotational movement of the assembly 10 as the key blade 11 is rotated. The plug 12 and the snap ring 13 secure the assembly 10 in place.

5

In connection with the operation of the lock described above, with the key blade 11 in place, the protrusions 21 of the disc plates 17 engage in the groove 22 and are oriented at a certain angle around the longitudinal axis 28 of the lock assembly 10 as the key blade 11 10 is punctured inside the lock cylinder assembly 13. When the key blade 11 is fully inserted, the protrusions 24 are radially aligned with the holes 25. This fact, together with the tapered sides of the groove 14 (see Figures 4A-4E), allows the locking rod 27 to move radially inwards.

Thus, when the key blade 11 is turned, the lock assembly 10 also rotates when the locking bar 27, which is allowed to move radially inwards, disengages from the groove 14.

20

If the key blade 11 does not have the correct shape according to the slot 22, the rod 27 is prevented from moving radially inwards because the protrusions 24 are not in line with the holes 25.

Thus, the protrusions 24 rest on the inner surface 25 of the locking bar 27, preventing its radial movement inwards. The rod 27 is thus retained in the groove 14 to prevent rotational movement of the lock cylinder assembly 10.

The key blade shown in Figure 2 is intended to be attached at the end 30 to the end of the key 30 (not shown) which is gripped by the user. The key blade 11 is in the shape of a "wedge groove" in cross section, as can be seen in connection with the head 30. The opposite end 32 is sharpened to facilitate the insertion of the key blade 11 into the lock cylinder assembly and to assist in the alignment of the protrusions 35 21 in the groove 22.

li 92345 11

As a security measure against unlawful interference with the lock cylinder assembly 10, the protective cover 29 (see Figures 1 and 3) is passed through the discs 19 and 20 of the disc plates 17 and washers 18 to cover the pattern of holes 5 25 in the locking bar 27 and prevent this pattern from "reading". when using the device.

Referring to Figures 4A-4E, in Figure 4A, the lock assembly is in the locked position 10 with the disc plates 17 "modified". The locking bar 27 is held in the groove 14 of the base part 16, the base part 16 again being placed inside the hollow lock body 15. The lock assembly cannot rotate inside the body 15 in connection with this embodiment.

15

In the case shown in Fig. 4B, the key blade 11 is placed in the bus 19. The disc plates 17 include protrusions 21 suitably aligned through the groove of the key plate 11 according to the drilling pattern of the locking bar 27.

20

Figure 4C shows the unlocked position. The key blade 11 is rotated to bring the locking bar 27 into contact with the disc plates 17. The locking bar 27 has moved radially inwards from its previous position in the groove 14, thus allowing the locking assembly 25 to rotate inside the body 15. The disc plates 17 are prevented from rotating by means of a locking bar 27, so that it is not possible to remove the key blade 11.

As shown in Fig. 4D, the continuous rotation of the key blade 11 is interrupted when the spring-loaded locking bar 27 falls back into the groove 14. The key blade 11 can then be pulled out.

Removal of the key blade 11 shapes the disc plates, keeping the locking bar 27 attached between the lock body 15 and the base portions 16 35, as shown in Fig. 4E.

92345 12

Figure 5 shows an alternative feature comprising means for preventing "locking" of the lock.

The disc plates 17 are provided with a friction surface 35 comprising a toothed surface in this particular embodiment.

The washers 18 are provided with small holes 36. A pin 37 is placed at the inner end of the lock cylinder-blade assembly 10, which can be moved in the longitudinal direction of the shaft 28. The plug 37 is moved by springs towards the disc plates 17. A brake rod 38 containing eccentric surfaces 39 is movably longitudinally movable therewith with the plug 37.

During use of the lock, the disc plates 17 cooperate with the locking bar 27 as described above. However, in this particular embodiment 15, the plug 37 prevents inward radial movement of the rod 27 prior to insertion of the key blade 11. When the key blade 11 penetrates having a given size and is pushed to the nojauskosketuksessa plug until 37 inside the border, it has the stopper 37 to move the arrow 40 direction by releasing 20 taen 27. However, when key blade 11 is fully inserted, the plug of the lock bar 37 to release the lock rod and the cam surface 39 attached to the small holes 36, whereby the brake rod 38 engages the surfaces 35 and prevents angular movement between the washers 18 and the disc plates 17.

25

The disc plates 17 are thus held in their correct angular position. If the plug 37 pushed in the direction of arrow 40 to release the locking bar 27 for picking, brake bar 38 prevents angular movement between washers 18 and the disc plates 17, 30 and the disk plates can be screwed connection-pick.

Il

Claims (13)

A reading cylinder combination (10), which operates by means of a key (11) and is intended to be mounted in a hollow weld body (15), comprising a hollow body (16), with a longitudinal shaft (28), at least one locking disc ( 17) supporting said body (16) and generally extending perpendicularly to said shaft (28), and this locking disc (17), or each of them, comprises an opening (19) for the key (11), a key fastener (21) adjacent the aperture (19) which secures the key (11) so that it can position the locking disc (17), or each, in a predetermined position around the longitudinal axis (28) without turning the key (11), and at least one latch bar (27) which is functionally connected to the latch plate (17), or each of them, and is arranged to move radially with respect to the longitudinal axis (28) from an outer position to the an internal position only after the locking disc (17), or each of them, is set in the previous position. in the closed position by means of the key (11), characterized in that the locking disc (17), or each of them, contains a protrusion or a pin (24) intended to be inserted into a slot, a lock, a shark or the like (25) in the latch bar (27) or each of them. 2. The cylinder cylinder combination (10) according to claim 1, characterized in that the hollow reading body (15) can be used as cylinder reading, eccentric reading, furniture reading or hanging. 20 The cylinder cylinder combination (10) according to claim 1 or 2, characterized in that it is intended to be used pivotally within the hollow reading body (15) in unread condition, wherein the reading cylinder combination (10) can be rotated where the locking bar (27) or any of the they are displaced in the inner position. 25 Reading cylinder combination (10) according to any of claims 1-3, characterized in that the fastening means (21) of the key (11) has one or more projections extending to the respective opening (19) in the locking disc. 30 Reading cylinder combination (10) according to any one of claims 1-3, characterized in that the locking bar (27) or each of them further comprises heels which cannot receive the projection or pin (24). The reading cylinder combination according to any of claims 1-5, characterized in that it contains at least one disc-shaped base plate (18). Reading cylinder combination (10) according to any one of claims 1-6, characterized in that it contains two or more locking discs (17). Il 17 92545 Reader cylinder combination according to any of claims 1-7, characterized in that it contains a single locking rod (27). 5 Reading cylinder combination (10) according to any of claims 1-8, characterized in that it contains ten locking discs (17) arranged as five pairs, each pair being separated from the others by the base plate (18) provided with a key profile opening (20). ). Reading cylinder combination (10) according to any of claims 6-9, characterized in that the locking discs (17) are prevented from turning with the means (35, 36, 37, 38, 39). Reading cylinder combination (10) as claimed in the preceding claim, characterized in that a protective cover (29) is used together with it to prevent access to the locking bar (37). 15 Key (11) to be used in the reading cylinder combination (10) according to which as claimed in claims 1-11, characterized in that this key (11) is provided with an edible memory tone a lock (22) extending at an angle in the longitudinal direction, and is cut into a curved surface, and this latch (22) receives the key member (21). 20 Key (11) according to claim 12, characterized in that it contains two latches (22).