ES2811901T3 - Cylinder lock - Google Patents

Abstract

A cylinder lock (10) comprising: - a first lock casing (12) having a substantially constant circumferential contour extending in an axial direction, while a first lock cylinder (14) is included in the lock casing lock; - a second lock casing (16) having a substantially constant circumferential contour extending in an axial direction, in which a second lock cylinder (18) or an operating knob assembly is included, the circumferential contour of corresponding the second lock housing (16) to the circumferential contour of the first lock housing (12), and the circumferential contours of the two lock housings (12, 16) are aligned with each other; - a carrier (20) that is provided with a carrier cam (22) and that is included between the first and second lock casings (12, 16), wherein the carrier (20) is rotatable with respect to the first and second lock housing (12, 16) and can be placed in a first position in which the carrier cam (22) is in a recess (24) between the first and second lock housing (12, 16) and in which further the carrier cam, seen in the axial direction of the lock (10), is within the circumferential contours, where the carrier (20) by rotation can be placed in a second position where the cam (22 ) of the carrier, viewed in the axial direction, extends outside the circumferential contours. - a bridge (26), connecting the first lock housing (12) with the second lock housing (16); - a hole guard that is included at least in the first lock housing (12) near an axial end (12a) of the first lock housing (12), the axial end (12a) of which is remote from the second housing ( 16) lock; - the hole protection is implemented as a ball (28) made of tempered steel, while the bridge (26), near an axial end of the same that is in a hole (30) of the bridge in the first casing (12) lock, is provided with a chamber (32) in which the ball (28) is received; characterized in that the bridge (26) comprises a substantially cylindrical central part (40) having a first diameter, wherein the central part (40) has a first and a second axial end (40a, 40b), wherein with the first end (40a) axially a first substantially cylindrical end portion (42) is connected, wherein a second substantially cylindrical end portion (44) is connected with the second axial end (40b), wherein the substantially cylindrical central portion (40) and the two end parts (42, 44) are coaxial with each other and have a common axis (Lb), wherein a first plane (V), in which the axis (Lb) extends, extends in use in one direction vertical and wherein a second plane (H), in which the axis (Lb) extends, extends in use in the horizontal direction; because - each end part (42, 44) has a cylindrical surface, wherein on the cylindrical surface of each end part (42, 44) a recess (46, 48) is provided having a, viewed in a perpendicular direction to the first plane (V), a substantially circular segment-shaped contour, where with each recess (46, 48) a substantially cylindrical transverse pin (50, 52) is associated, as well as a transverse hole (54, 56) in the lock housing (12, 16) associated with the respective end portion (42, 44).

Description

DESCRIPTION

Cylinder lock

Field

The invention relates to a cylinder lock with hole protection.

Background

From EP-1 209305 A1 a cylinder lock is known comprising:

a first lock housing having a substantially constant circumferential contour extending in an axial direction, while a first lock cylinder is included in the lock housing;

a second lock housing having a substantially constant circumferential contour extending in an axial direction, in which a second lock cylinder or operating knob assembly is included, the circumferential contour of the second lock housing corresponding to the contour circumferential of the first lock casing, and the circumferential contours of the two lock casings are aligned with each other;

a carrier which is provided with a carrier cam and which is included between the first and second lock casings, wherein the carrier is rotatable with respect to the first and second lock casings and can be placed in a first position in which the carrier cam is in a recess between the first and second lock casings and in which further the carrier cam, viewed in the axial direction of the lock, is within the circumferential contours, where the carrier by rotation it can be placed in a second position in which the carrier cam, viewed in the axial direction, extends outside the circumferential contours;

a bridge, connecting the first lock housing with the second lock housing; Y

a bore guard that is included in at least the first lock housing near an axial end of the first lock housing, the axial end of which is remote from the second lock housing;

The drill guard is implemented as a tempered steel ball, while the bridge, near an axial end thereof which is in a bridge hole in the first lock housing, is provided with a chamber in which the ball.

In the cylinder lock known from EP-1 209305, each lock housing is provided at the bottom with a downwardly open rectangular slot in which the bridge can be received. The drill guard is made up of a loose part which in that publication is designated by the reference number 11. A drill guard is especially important to protect the lock against thieves trying to drill into the lower area of the lock with a drill. so that the connection of the bridge with the lock housing is damaged, and then the lock housing can be pulled out of the bridge with force.

Other examples are NL 6711 284 A (NL'284) and FR 2689558 A1 (FR'558).

Document NL'284 discloses a cylinder lock with hole protection. The lock includes a first lock housing and a second lock housing, as well as a bridge that are integrally formed in one piece. The drill guard comprises steel balls that are placed inside the lock pin springs.

FR'558 discloses a barrel lock in two sections, each with a stator and a rotor, linked by a bridge. At the distal ends of the bridge, chambers are provided in which pins of hard material, eg, tungsten carbide, are accommodated, which form protection against tampering.

A second form of unauthorized keyless opening of a lock involves so-called tampering. This has even become a sport, for which there are also clubs and tools for sale. A description of a lock picking tool is given, for example, in US-5956 984 B1.

A lock pin with improved protection against tampering is described in DE 1122 866 B1. The known lock pin comprises a stem, a head that widens relative to the stem and forms a first end of the lock pin, at least one loose ring that extends around the stem with clearance, and a retaining ring that is fixedly connected to the stem and forms a second end of the lock pin.

Summary of the invention

A drawback of the drill guard known from EP '305 is that mounting the drill guard together with the bridge and the lock housing is difficult because it is necessary to put three loose parts together simultaneously. Therefore, the part that forms the drill guard is a special part that has a special shape. Such a part is expensive to manufacture, in particular also because the material must be hardened and is therefore difficult to machine.

The invention contemplates a cylinder lock having the properties described above without the disadvantages just described. More particularly, the invention contemplates a cylinder lock whose hole protection can be implemented more economically and whose assembly is simpler.

To this end, the invention provides a cylinder lock according to claim 1. More particularly, the lock described in the background section is characterized according to the invention in that

the bridge comprises a substantially cylindrical central part having a first diameter, wherein the central part has a first and a second axial end, wherein a substantially cylindrical first end part is connected with the first axial end, wherein with the second axial end connects a second, substantially cylindrical end portion, wherein the substantially cylindrical central portion and the two end portions are coaxial with each other and have a common axis, wherein a first plane, in which the axis extends, extends extends in use in a vertical direction and wherein a second plane, in which the axis extends, extends in use in a horizontal direction; because

each end part has a cylindrical surface, wherein on the cylindrical surface of each end part a recess is provided having, viewed in a direction perpendicular to the first plane, an outline in the form of substantially circular segments, wherein with each recess there is an associated substantially cylindrical cross pin, as well as a cross hole in the lock housing associated with the respective end portion.

Hardened steel balls are a commercially available standard product. They are produced in large quantities for ball bearings and for that reason they are available at a relatively low price. As the bridge is provided with a chamber to collect the ball, the assembly of a lock is simpler than in the case of the prior art lock with hole protection. This is because the balls are placed in the bridge chambers first. The axial end parts of the bridge can then be moved to the two lock housings. After this, it is only necessary to fix the bridge with respect to the lock housings, which will be described in more detail below with reference to an example embodiment. The cross pins provide a very strong connection between the bridge and the lock housings. Certainly, when the cross pins are also made of tempered steel, it is practically impossible to sabotage the cylinder lock using a drill. The drill guard provided with balls and cross pins provides a particularly secure cylinder lock that meets the highest safety standards.

The invention will be clarified hereinafter on the basis of a number of embodiments, with reference to examples of such embodiments represented in the drawings.

Brief description of the figures

FIG. 1 shows a perspective of an example of a lock in which different embodiments are made;

FIG. 2 shows a perspective similar to FIG. 1, in exploded view;

FIG. 3 shows a perspective similar to FIG. 1, without the left side lock housing;

FIG. 4 shows a front view of the example of FIG. 1;

FIG. 5 shows a partial sectional view taken along line V-V of FIG. 4;

FIG. 6 shows a perspective of the bridge of the example of FIG. 1;

FIG. 7 shows a top plan view of the bridge represented in FIG. 6;

FIG. 8 shows a perspective of an alternative embodiment of the bridge;

FIG 9 shows a top plan view of the bridge depicted in FIG. 8;

FIG. 10 shows a side view of an example of a lock pin; Y

FIG. 11 shows a sectional view taken along line XI-XI of FIG. 10.

Detailed description

Figures 1-5 show an example of a cylinder lock in which various embodiments are made as described in the sub-claims. It is noted that the embodiments can also be applied independently of each other and that the invention is not limited to the examples shown in the figures. Following, Various embodiments will be described, with reference to the figures with the aid of reference numerals. Reference numerals are used for clarity, but do not have any limiting effect. An embodiment can also be implemented in a way other than that represented in the example shown in the figures.

In the most general terms, the invention provides a cylinder lock 10 comprising a first lock housing 12 having a substantially constant circumferential contour extending in an axial direction, with a lock cylinder 14 included in the lock housing 12 . Furthermore, the cylinder lock 10 comprises a second lock housing 16 having a substantially constant circumferential contour extending in an axial direction, in which a second lock cylinder (not shown) or an operating knob assembly is included. . A description of an example of such an operating knob assembly is provided in the Netherlands patent application NL-2012477. The circumferential contour of the second lock housing 16 corresponds to the circumferential contour of the first lock housing 12 and the circumferential contours of the two lock housings 12, 16 extend in line with each other. The cylinder lock 10 is further provided with a carrier 20 which is provided with a carrier cam 22 and which is included between the first and second lock casings 12, 16. The carrier 20 is rotatable with respect to the first and second lock casings 12, 16 and can be placed in a first position in which the carrier cam 22 is in a recess 24 between the first and second casings 12, 16 lock. In that first position, moreover, the carrier cam 22, viewed in the axial direction of the lock 10, is within the circumferential contours of the two lock housings 12, 16. By rotation, the carrier 20 can be placed in a second position in which the carrier cam 22, viewed in the axial direction, extends outside the circumferential contours. The cylinder lock 10 is further provided with a bridge 26, which connects the first lock housing 12 with the second lock housing 16. To avoid sabotage whereby the connection between the bridge 26 and the lock housing 12 is broken when drilling, the cylinder lock 10 is provided with a hole protection that is included at least in the first lock housing 12 near an axial end 12a of the first lock housing 12, this axial end 12a being remote from the second lock housing 16. In themselves, all the general characteristics mentioned above are known from the European patent application EP-1209305 A1 mentioned above.

The cylinder lock 10 is characterized in that the bore guard is implemented as a tempered steel ball 28, while the bridge 26, near an axial end thereof, is located in a bridge hole 30 in the first housing 12 of lock, is provided with a chamber 32 in which the ball 28 is received.

Such a drill guard is easy to assemble and can be implemented inexpensively because hard steel balls can be obtained at low cost and the assembly is simple.

In one embodiment, an example of which is shown in the figures, also the second lock housing 16 may be provided with a hole guard. This bore guard can also be implemented as a tempered steel ball 34, while the bridge 26, near an axial end thereof which is in a bridge hole 36 in the second lock housing 16, is provided with a chamber. 38 in which the ball is received 34

Bridge 26 comprises a substantially cylindrical central portion 40 of a first diameter. The central part 40 has a first and a second axial end 40a, 40b. With the first axial end 40a, a substantially cylindrical first end portion 42 is connected. With the second axial end 40b, a second substantially cylindrical end portion 44 is connected. In the example shown, the end portions 42, 44 and the center portion 40 are implemented as a single integral component. The substantially cylindrical central part 40 and the two end parts 42, 44 are positioned coaxially with each other and therefore have a common axis Lb. A first plane V including the axis Lb extends in use in a vertical direction. A second plane H including the axis Lb extends in use in a horizontal direction.

In one embodiment, an example of which is shown in Figures 1-5, the central portion 40 may be provided, on opposite sides of the center thereof, with a hole 84, 86. A hole 84 may be associated with a threaded hole 88 in the first lock housing 12. The other hole 86 may be associated with a threaded hole (not shown) in the second lock housing. The cylinder lock 10 in this embodiment may be provided with two bolts 80, 82. A first 80 of the two bolts 80, 82, in the assembled condition of the cylinder lock 10, extends through a hole 84 and is fixed in the threaded hole 88 in the first lock housing 12. The other 82 of the two bolts 80, 82, in the assembled state of the cylinder lock 10, extends through the other hole 86 and is fixed in the threaded hole in the second lock housing 16.

With such bolts 80, 82 the bridge 26 and the lock housings 12,16 can be connected to each other in a simple manner. Assembly and disassembly are therefore feasible with a reduced number of operations.

Each end portion 42, 44 has a cylindrical surface or surfaces. On the cylindrical surface of each end portion 42, 44 a recess 46, 48 is provided, which has, viewed in a direction perpendicular to the first plane V, a substantially circular segment-shaped contour. Furthermore, associated with each recess 46, 48 is a substantially cylindrical transverse pin 50, 52, as well as a transverse hole 54, 56 in the lock housing 12, 16 associated with the respective end portion 42, 44.

The cross pins 50, 52 provide for a very strong connection between the bridge 26 and the lock housings 12,16. Certainly, when the cross pins 50, 52 are also made of hardened steel, it is practically impossible to sabotage the cylinder lock 10 by means of a drill. The drill guard provided with balls 28, 34 and the cross pins 50, 52 provide a particularly secure cylinder lock 10 that meets the highest security class standard.

In one embodiment, two examples of which are shown in Figures 1-9, in each recess 46, 48 in the surface of the end portion 42, 44 a central flange 58, 60 may be provided which is on the side of the recess 46, 48 proximal to central portion 40. The substantially cylindrical transverse pin 50, 52 may then be provided with a central slot 62, 64 in which in the assembled state of the cylinder lock 10 the central flange 58, 60 is received.

This central flange 58, 60 prevents the transverse pin 50, 52 from possibly falling out of the lock housing 12,16 when the bridge 26 has taken its final position in the lock housings 12,16.

The assembly proceeds as follows: first, an end portion 42, 44 is partially slid into the bridge hole 30, 36 of the lock housing 12, 16 associated with the end portion 42, 44. Next, the transverse pin 50, 52 is slid into the transverse hole 54, 56. After this, the end portions 42, 44 slide deeper into the holes 30, 36 of the bridge, so that the central flange 58, 60 is received in the central groove 62, 64 of the corresponding transverse pin 50, 52. Finally, with the help of the bolts 80, 82, the bridge 26 and the lock housings 12,16 are connected to each other. When a thief tries to break the lock housing 12 and release it from the bridge 26 with brute force, he must break not only the bolt 80 but also the transverse pin 50. Since the cross pin 50 can be made of high quality tempered material, this is virtually impossible and the thief's attempts will fail.

In one embodiment, an example of which is shown in Figures 1-9, each end portion 42, 44 may include a chamber 32, 38 mentioned above for receiving a ball 28, 34 mentioned above. By including the chamber 32, 38 in an end portion 42, 44, the ball 28, 34 in an assembled condition of the cylinder lock 10 is always confined in the chamber 32, 38 because the access opening of the chamber 32, 38 is closed by the associated lock housing 12,16.

In one embodiment, an example of which is shown in Figures 8 and 9, the chamber 32, 38 in an end portion 42, 44 may be located below the recess 46, 48 in the cylindrical surface of the portion 42, 44 extreme.

In such an implementation, the location of the ball 28, 34 in the chamber 32, 38 is somewhat smaller, so that the possibilities of movement of the ball 28, 34 are somewhat more limited. This makes the chances of successfully executing a drill attack even slimmer.

Instead of, or in addition to, the bolts 80, 82, in one embodiment of the cylinder lock 10 each end pin 42, 44 may be provided with a circumferential groove 66, 68 which is associated with a clip. An example of this embodiment is shown in Figures 8 and 9. Next, each lock housing can be provided with a clip slot in which the clip can be received. In an assembled condition, the clip can be received in the clip slot in the lock housing 12, 16 and engages a circumferential groove 66, 68 of the associated end pin 42, 44 that is received in the lock housing 12, 16 respective. Clips and clip slots are not shown in the drawings. However, the use of such clips and clip slots is known, for example, from WO2006 / 042753 A1 and, for an example of the clips and clip slots, reference is made to that publication.

In an exemplary embodiment, an example of which is shown in Figures 1-9, the center portion 40 may be provided with a center hole 78 that extends perpendicular to the first plane V and is threaded.

With the help of this central hole, the cylinder lock can be attached to a door (not shown) by means of a bolt that engages in the central hole 78.

In one embodiment, the cylinder lock comprises a lock pin 200 which is intended in particular to prevent unauthorized opening of a cylinder lock 10 by forcing the lock, or at least to make this as difficult as possible.

An example of a lock pin 200 is shown in detail in Figures 10 and 11. Also in Figures 2 and 5, the example of the lock pin 200 of Figures 10 and 11 is shown. It should be noted that the new bridge 26 With the new hole protection it can also be applied to a cylinder lock 10 which is provided with conventional lock pins.

The anti-strain lock pin 200, of which, as mentioned, an example is shown in Figures 10 and 11, has in the most general terms a stem 206 and a head 208 that widens relative to the stem 206 and forms a second end 204 of the lock pin. In addition, the lock pin 200 is provided with at least one loose ring 210, 210 ', 210 "which extends around the shaft 206 with clearance. In addition, the lock pin 200 has a retaining ring 212 that is fixedly connected with the stem 206 and that forms a first lock pin end 202.

Loose rings 210, 210 ', 210 "make forcing the lock practically impossible, presumably because locking of said ring 210, 210', 210" during lock picking does not yet lead to axial locking of stem 206 and the head 208, connected to the same lock pin 200. In any case, it appears from practical tests that the lock pin 200 makes forcing the lock practically impossible.

In the example of Figure 2, lock pins 200 are shown, viewed from left to right, with respectively two, one, three, and a loose ring or rings 210, 210 ', 210 ".

In one embodiment, an example of which is shown in Figures 10 and 11, the stem 206 may be provided, near the first end 202 of the lock pin, with a reduced cylindrical portion 206 'whose length Lj substantially corresponds to the height H1 of retaining ring 212. At the first end 202, a central axial center hole 214 may be provided. The retaining ring 212 may be provided with a central hole 216 into which the reduced cylindrical portion 206 'is correctly received. One end of the center hole 216 of the retaining ring 212 that is remote from the head 208 may be provided with a chamfer 218. After the loose rings 210, 210 ', 210 "have been placed on the stem 206, and the ring 212 retainer has been placed in the reduced part 206 'of the stem 206, the free end of the reduced cylindrical part 206' can be widened by plastic deformation, so that the widened part 220 thereof is received in the bevel 218.

Thus, in a simple and efficient manner, a non-detachable connection is made between the stem 206 and the retaining ring 212, whereby the loose rings are also placed in a non-deformable manner, but with play, on the stem 206.

In one embodiment, an example of which is shown in the figures, the lock pin 200, depending on the desired length, may be provided with one to six loose rings 210, 210 ', 210 ", while the length Ls of the non-reduced portion of the stem 206 is somewhat greater than the sum of the heights H2 of the loose rings 210, 210 ', 210 "placed on the stem 206, so that the loose rings 210, 210', 210" are arranged in stem 206 with some play.

The presence of the game is important to obtain the desired effect, that is, to efficiently prevent the tampering of the lock.

The various embodiments described above can be applied independently of one another and can be combined with each other in different ways, as defined in the appended claims. Reference numerals in the detailed description and claims do not limit the description of the claims and serve for clarification only.

Claims (11)

1. A cylinder lock (10) comprising: • a first lock casing (12) having a substantially constant circumferential contour extending in an axial direction, while a first lock cylinder (14) is included in the lock casing; • a second lock housing (16) having a substantially constant circumferential contour extending in an axial direction, in which a second lock cylinder (18) or an operating knob assembly is included, the circumferential contour of the the second lock housing (16) to the circumferential contour of the first lock housing (12), and the circumferential contours of the two lock housings (12, 16) are aligned with each other; • a carrier (20) that is provided with a carrier cam (22) and that is included between the first and second lock casings (12, 16), wherein the carrier (20) is rotatable with respect to the first and second lock housing (12, 16) and can be placed in a first position in which the carrier cam (22) is in a recess (24) between the first and second lock housing (12, 16) and in which further the carrier cam, seen in the axial direction of the lock (10), is within the circumferential contours, where the carrier (20) by rotation can be placed in a second position where the cam (22 ) of the carrier, viewed in the axial direction, extends outside the circumferential contours. • a bridge (26), connecting the first lock housing (12) with the second lock housing (16); • a hole guard that is included in at least the first lock housing (12) near an axial end (12a) of the first lock housing (12), the axial end (12a) of which is remote from the second housing ( 16) lock; • the bore guard is implemented as a ball (28) of hardened steel, while the bridge (26), near an axial end thereof which is located in a hole (30) of the bridge in the first casing (12) lock, is provided with a chamber (32) in which the ball (28) is received; characterized because The bridge (26) comprises a substantially cylindrical central part (40) having a first diameter, wherein the central part (40) has a first and a second axial end (40a, 40b), wherein with the first end (40a axial) a substantially cylindrical first end part (42) is connected, wherein a substantially cylindrical second end part (44) is connected with the second axial end (40b), wherein the substantially cylindrical central part (40) and the two end parts (42, 44) are coaxial with each other and have a common axis (Lb), wherein a first plane (V), in which the axis (Lb) extends, extends in use in a vertical direction and wherein a second plane (H), in which the axis (Lb) extends, extends in use in the horizontal direction; because • Each end portion (42, 44) has a cylindrical surface, wherein on the cylindrical surface of each end portion (42, 44) a recess (46, 48) is provided having a, viewed in a direction perpendicular to the first plane (V), contour in the form of a substantially circular segment, where with each recess (46, 48) a substantially cylindrical transverse pin (50, 52) is associated, as well as a transverse hole (54, 56) in the housing (12, 16) lock associated with the respective end portion (42, 44). The cylinder lock according to claim 1, wherein also the second lock housing (16) is provided with a hole protection, wherein the hole protection in the second lock housing (16) is implemented as a ball (34) of tempered steel, while the bridge (26), near an axial end thereof which is in a bridge hole (36) in the second lock housing (16), is provided with a chamber ( 38) in which the ball (34) is received. The cylinder lock according to claim 1 or 2, wherein the central part (40), on opposite sides of the center itself, is provided with a hole (84, 86), in which a hole ( 84) is associated with a threaded hole (88) in the first lock housing (12) and wherein the other hole (86) is associated with a threaded hole in the second lock housing (16), wherein the lock ( 10) cylinder is provided with two bolts (80, 82), wherein a first (80) of the two bolts (80, 82) extends through a hole (84) and is fixed in the hole (88) threaded hole in the first lock housing (12), where the other (82) of the two bolts (80, 82) extends through the other hole (86) and is fixed in the threaded hole in the second housing (16 ) lock. The cylinder lock according to any one of claims 1-3, wherein in each recess (46, 48) in the surface of the end portion (42, 44) a flange (58, 60) is provided central that is on the side of the recess (46, 48) close to the central part (40), in which the substantially cylindrical transverse pin (50, 52) is provided with a central groove (62, 64) in which, In the assembled condition, the cylinder lock (10) is received by the central flange (58, 60). The cylinder lock according to any one of claims 1, 3 or 4 and including the features of claim 2, wherein each end portion (42, 44) includes said chamber (32, 38) for receiving said ball (28, 34). The cylinder lock according to any one of claims 1-4, wherein each end part (42, 44) includes said chamber (32, 38) for receiving said ball (28, 34), wherein the chamber (32, 38) in said end portion (42, 44) is below the recess (46, 48) in the cylindrical surface of said end portion (42, 44). The cylinder lock according to any one of claims 1-6, wherein each end portion (42, 44) is provided with a circumferential groove (66, 68) that is associated with a clip, wherein each Lock housing is provided with a clip slot in which the clip can be received, and where, in an assembled condition, the clip is received in the clip slot in the lock housing (12, 16) and engages with the circumferential groove (66, 68) in the end portion (42,44) that is received in the lock housing (12, 16). The cylinder lock according to any one of claims 1-7, wherein the central part (40) is provided with a central hole (78) which extends perpendicular to the first plane (V) and which is threaded. The cylinder lock according to any one of claims 1-8, wherein the first lock cylinder (14) that is included in the first lock casing (12) is rotatable with respect to the first casing (12 ) of the lock around a central axis (Lc) in an unlocked state, wherein the cylinder lock comprises: • at least one lock pin (200) having a first lock pin end (202) and a second lock pin end (204), wherein each lock pin (200) is included in the first housing ( 12) lockable and is provided with an axis (P) extending perpendicular to the central axis (Lc); • at least one lock pin spring (90) that engages a lock pin first end (202) of a lock pin (200) associated with that lock pin spring (90), which spring (90 ) of the lock pin pushes the associated lock pin (200) in the direction of the first lock cylinder (14); • at least one cylinder pin (92) having a first cylinder pin end (94) and a second cylinder pin end (96), wherein each cylinder pin (92) is included in the first cylinder ( 14) of lock and is provided with an axis (P ') that extends perpendicular to the central axis (Lc), where the first end (94) of the cylinder pin rests against the second end (204) of the lock pin of the lock pin (200) associated with the cylinder pin (92), wherein the at least one cylinder pin in use is engaged by a key, whereby the cylinder pin (92) moves, against the action of the spring, moving away from the central axis (Lc) of the first lock cylinder (14), so that the first end (94) of the cylinder pin and the second end of the lock pin (204) of each lock pin (92) cylinder and lock pin (200) are moved to a position where they are flush with the cylindrical surface of the c the lock cylinder (14) so that the lock cylinder (14) can rotate in the lock housing (12); wherein the at least one lock pin (200) comprises: a stem (206); a head (208) that widens with respect to the stem (206) and that forms the second end (204) of the lock pin; at least one loose ring (210, 210 ', 210 ") extending around the stem (206) with clearance; A retaining ring (212) that is fixedly connected to the stem (206) and forms the first end (202) of the lock pin. The cylinder lock according to claim 9, wherein the stem (206) near the first end (202) of the lock pin is provided with a reduced cylindrical portion (206 ') whose length corresponds substantially to the height of the retaining ring (212), wherein at the first end (202) a central axial central hole (214) is provided, wherein the retaining ring (212) is provided with a central hole (216) in which the part Reduced cylindrical (206 ') is correctly received, wherein one end of the central hole (216) of the retaining ring (212) that is remote from the head (208) is provided with a bevel (218), and wherein the free end of the reduced cylindrical part (206 ') is widened by plastic deformation, so that its widened part (220) is received in the bevel (218). The cylinder lock according to claim 9 or 10, wherein the lock pin (200), depending on the desired length, is provided with one to six loose rings (210, 210 ', 210 "), while that the length of the non-reduced portion (206 ") of the stem (206) is somewhat greater than the sum of the heights of the loose rings (210, 210 ', 210") placed on the stem, so that the rings ( 210, 210 ', 210 ") loose are arranged on the stem (206) with some play.