EP4115036A1 - Cylinder lock and key thereof - Google Patents

Cylinder lock and key thereof

Info

Publication number
EP4115036A1
EP4115036A1 EP20730336.3A EP20730336A EP4115036A1 EP 4115036 A1 EP4115036 A1 EP 4115036A1 EP 20730336 A EP20730336 A EP 20730336A EP 4115036 A1 EP4115036 A1 EP 4115036A1
Authority
EP
European Patent Office
Prior art keywords
bushing
key
diameter
cylinder lock
primary
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20730336.3A
Other languages
German (de)
French (fr)
Inventor
Matteo Fabbri
Giovanni Ferri
Enzo Talamonti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CISA SpA
Original Assignee
CISA SpA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CISA SpA filed Critical CISA SpA
Publication of EP4115036A1 publication Critical patent/EP4115036A1/en
Pending legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B35/00—Locks for use with special keys or a plurality of keys ; keys therefor
    • E05B35/003—Locks for use with special keys or a plurality of keys ; keys therefor for keys with movable bits
    • E05B35/004—Locks for use with special keys or a plurality of keys ; keys therefor for keys with movable bits pivoting about an axis perpendicular to the main key axis
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B27/00—Cylinder locks or other locks with tumbler pins or balls that are set by pushing the key in
    • E05B27/0003—Details
    • E05B27/0017—Tumblers or pins
    • E05B27/0021—Tumblers or pins having movable parts

Definitions

  • the present invention relates to a cylinder lock and to the key thereof.
  • the primary pins are associated with respective complementary pins which can translate elastically from a configuration of total accommodation within the stator to at least one configuration of simultaneous accommodation in the stator and in the rotor with consequent integral coupling of these two parts.
  • the key has a lever, which is accommodated so that it can rotate within a respective seat and which, when the key is inserted in the channel, actuates the primary pins, arranging them so that the complementary pins are in the configuration of total accommodation within the stator, allowing an optional movement of the rotor following a rotation of said key.
  • the aim of the present invention is to solve the problems described above, proposing a cylinder lock and the key thereof that have higher security standards against break-ins than those ensured by known technical solutions.
  • an object of the invention is to provide a cylinder lock and the key thereof that are compatible with locks and keys thereof of the known type.
  • Another object of the invention is to provide a cylinder lock that is constituted by a limited number of components that can be assembled in the assembly configuration in a substantially simple manner.
  • a further object of the present invention is to provide a cylinder lock and the key thereof that have low costs, are relatively simple to provide in practice and are safe in application.
  • a cylinder lock and a key thereof of the type comprising a stator within which a rotor can rotate which is provided with a longitudinal channel inside which respective primary pins are arranged substantially mutually opposite, said channel being adapted for the insertion of a key provided with a seat for the accommodation of a respective lever which can be oriented freely and is adapted to actuate said primary pins, characterized in that at least one of said primary pins is constituted by a bushing and a contoured grub which has at least one segment of its contour whose shape and dimensions are complementary to those of the internal cavity of said bushing; axially acting elastic means are interposed between said bushing and said grub for their respective mutual spacing without external forces applied to said bushing toward said grub; said stator comprises a recess whose shape and dimensions are complementary to those of the terminal front, in the radial direction, of said primary pin for the temporary accommodation of said front, said reces
  • Figure 1 is a schematic longitudinal sectional side view of a cylinder lock in which the key thereof is inserted according to the invention
  • Figure 2 is a sectional view, taken along the plane A-A of Figure 1, of the cylinder lock and of the key thereof of Figure 1;
  • Figure 3 is a sectional view, taken along the plane A-A of Figure 1, of the cylinder lock and of the key thereof of Figure 1 in a first opening step;
  • Figure 4 is a sectional view, taken along the plane A-A of Figure 1, of the cylinder lock and of the key thereof of Figure 1 in a second opening step;
  • Figure 5 is a schematic longitudinal sectional side view of a cylinder lock according to the invention in which a perforated false key is inserted
  • Figure 6 is a sectional view, taken along the plane B-B outlined in Figure 5, of the cylinder lock according to the invention in which a perforated false key is inserted;
  • Figure 7 is a sectional view, taken along the plane B-B of Figure 5, of the cylinder lock according to the invention in which a perforated false key is inserted in the locking configuration that is a consequence of a forced opening attempt;
  • Figure 8 is an enlarged-scale view of a detail of Figure 7;
  • Figure 9 is a schematic longitudinal sectional side view of a cylinder lock according to the invention in which a solid false key is inserted;
  • Figure 10 is a sectional view, taken along the plane C-C of Figure 9, of the cylinder lock according to the invention in which a solid false key is inserted;
  • Figure 11 is a sectional view, taken along the plane C-C of Figure 9, of the cylinder lock according to the invention in which a solid false key is inserted in the locking configuration that is a consequence of a forced opening attempt;
  • Figure 12 is a sectional view, taken along a transverse plane that passes through the axes of the primary pins, of a first cylinder lock according to the invention with a coded primary pin and a respective first key according to the invention with coded lever;
  • Figure 13 is a sectional view, taken along a transverse plane that passes through the axes of the primary pins, of a second cylinder lock according to the invention with a coded primary pin and a respective second key according to the invention with coded lever;
  • Figure 14 is a sectional view, taken along a transverse plane that passes through the axes of the primary pins, of a third cylinder lock according to the invention with a coded primary pin and a respective third key according to the invention with coded lever;
  • Figure 15 is a schematic longitudinal sectional side view of a cylinder lock in which a key according to the invention with incorrect lever coding is inserted;
  • Figure 16 is a sectional view, taken along the plane D-D of Figure 15, of the cylindrical lock according to the invention in which a key with incorrect coding of the lever is inserted;
  • Figure 17 is a sectional view, taken along the plane D-D of Figure 15, of the cylindrical lock according to the invention in which a key with incorrect coding of the lever is inserted in the locking configuration that is a consequence of a forced opening attempt;
  • Figure 18 is an enlarged-scale view of a detail of Figure 17.
  • the reference numeral 1 generally designates a cylinder lock and the reference numeral 2 designates the key thereof.
  • the cylinder lock 1 comprises a stator 3 within which a rotor 4 can rotate which is provided with a longitudinal channel 5 within which respective primary pins 6, 7 are substantially mutually opposite.
  • Both primary pins 6, 7 can slide transversely with respect to the channel 5 between respective configurations of different interference (even up to the elimination thereof) with said channel 5.
  • the channel 5 is adapted to receive a key 2 (inserted from the outside) provided with a seat 8 for the accommodation of a respective freely orientable lever 9.
  • the lever 9 is designed for the correct alignment of the primary pins 6, 7, since they are actuated by the lever 9 (on which they abut when the key 2 is inserted correctly in the channel 5) and are arranged in a specific coding configuration by it.
  • At least one of the primary pins 6 can conveniently be constituted by a bushing 10 and a contoured grub 11, which has at least one segment 12a, 12b of its contour whose shape and dimensions are complementary to those of the internal cavity 13 of the bushing 10.
  • the grub 11 and the bushing 10 can behave like a cylindrical pair in which the grub 11 can slide freely within the cavity 13 along a direction that is defined by the common axis of symmetry.
  • the stator 3 in turn, comprises a recess 15 whose shape and dimensions are complementary to those of the terminal front, in a radial direction, of the primary pin 6 for the temporary accommodation of said front.
  • the recess 15 is advantageously aligned with the hole 16 of the rotor 4 within which the bushing 10 and the grub 11 are arranged.
  • At least one elastic element 17 is efficiently interposed between the stator 3 and the at least one additional primary pin 7 in order to force it within the longitudinal channel 5.
  • the elastic means 14 and the elastic element 17 apply such an elastic action as to force the protrusion of the terminal end of the primary pins 6 and 7 into the longitudinal channel 5.
  • the hole 16 of the rotor 4 designed to accommodate the primary pin 6 can conveniently comprise consecutive portions of different diameter.
  • the grub 11 can validly comprise a head segment 12b which has a diameter that is substantially similar to the diameter of the internal cavity 13 of the bushing 10 (as already shown earlier), at least one intermediate recessed portion 22 whose diameter is smaller than the diameter of the internal cavity 13 of the bushing 10, at least one intermediate segment 12a whose diameter is substantially similar to the diameter of the internal cavity 13 of the bushing 10 (also already shown earlier), and at least one terminal portion 23 whose diameter is smaller than the diameter of the internal cavity 13 of the bushing 10.
  • a region with a smaller diameter can be formed between the segment 12a and the segment 12b.
  • the bushing 10 can in turn usefully comprise a substantially frustum-like terminal annular portion 24 whose diameter is complementary to the diameter of the at least one second extent 20 of the hole 16, a central cylindrical part 25 having a smaller diameter, and a terminal head 18 in turn provided with a cylindrical part 26 and a tapered end tab 27.
  • the smaller-diameter region formed between the segment 12a and the segment 12b of the grub 11 and the smaller-diameter central cylindrical part 25 of the bushing 10 have the function of facilitating the jamming of the primary pin 6 (of its components) upon an attempt to break into the lock 1.
  • the reduction in diameter allows the grub 11 to tilt with respect to the bushing 10 and allows the bushing 10 to tilt with respect to the hole 16, defining configurations for locking rotation if said rotation is imposed from the outside without using the appropriate key 2 according to the invention.
  • the elastic means 14 are interposed usefully between the bottom of the cavity 13 of the bushing 10 and the at least one intermediate segment 12a having a diameter that is substantially similar to the diameter of the internal cavity 13, so as to form an abutment shoulder for said elastic means 14.
  • the recess 15 of the stator 3 is delimited between two intersecting inclined planes 28 and 29, which are mutually blended at the bottom of said recess 15 and blended with the surface of the duct 30 of the stator 3 designed for the rotary accommodation of the rotor 4.
  • the recess 15 can be provided by milling (or in general by chip-forming machining) of the internal surface of the duct 30 of the stator 3: the milling can be localized exclusively at an area that is aligned with the hole 16 of the rotor 4 in the assembly configuration or, more probably, extend from the terminal face of the stator 3 up to said area.
  • the lever 9 can advantageously have a thickness that is variable, even locally and with discontinuity, according to a substantially coded shape, which depends on the geometry and arrangement of the end of the primary pins 6 and 7 which are substantially aligned therewith and abut against it.
  • the particular shape of the lever 9 conveniently defines a particular configuration for the resting of the ends of the primary pins 6 and 7 on its surface: in practice, the ends of the primary pins 6, 7 can be shaped appropriately in order to engage in corresponding complementarity shaped regions provided on the lever 9, allowing the overall arrangement of the lock 1 and of the key 2 thereof in the open configuration only upon the correct abutment of each shaped region in the corresponding complementarily shaped region.
  • the bushings 10 of the primary pins 6 can have a specific shape at their head 18, so as to allow correct coupling with the shaped regions (codes) provided on the lever 9.
  • the primary pin 7 can slide advantageously within a contoured channel 31 that is present in the rotor 4 and in the stator 3 (i.e., the channel 31 is extended in a radial direction from the stator 3 into the rotor 4 until it leads into the longitudinal channel 5).
  • the channel 31 comprises an external rotor portion 32 and an external stator portion 33; both portions 32, 33 have a diameter that is suitable to accommodate slidingly a base plate 34 of the primary pin 7.
  • the channel 31 furthermore comprises an internal portion 35 (of the rotor 4 and formed between the portion 32 and the longitudinal channel 5) that has a smaller diameter and is suitable to accommodate slidingly an elongated stem 36 of the primary pin 7.
  • the at least one elastic element 17 can be conveniently interposed between the bottom of the channel 31 and the base plate 33.
  • the elastic means 14 and the elastic element 17 can be constituted by helical springs having a shape, size and elastic constant that depend on the specific mechanical behavior that one seeks to assign to the lock 1.
  • the plate 33 constitutes in practice an abutment complementary pin for the primary pin 7.
  • the lever 9 can have a substantially flattened shape and can be pivoted within a seat 8 which is complementary to the contour of the lever 9, at a perimetric edge thereof.
  • the opposite edge of the lever 9 is the one that oscillates freely between extreme configurations of protrusion from the profile of the key 2.
  • the present invention solves the problems described earlier, proposing a cylinder lock 1 and the key 2 thereof that have security standards against break-ins that are higher than those ensured by known technical solutions.
  • the cylinder lock 1 and the key 2 thereof are compatible with the locks and associated keys of the known type that belong to the same product category.
  • the cylinder lock 1 is constituted by a limited number of components that can be assembled in the assembly configuration in a substantially simple manner.
  • the cylinder lock 1 and the key 2 thereof are relatively simple to provide in practice and substantially modest in cost: these characteristics make the lock 1 and the key 2 according to the invention innovations of assured application.
  • the invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the accompanying claims; all the details may furthermore be replaced with other technically equivalent elements.
  • the materials used, as well as the dimensions, may be any according to the requirements and the state of the art.
  • a cylinder lock and a key thereof of the type comprising a stator (3) within which a rotor (4) can rotate which is provided with a longitudinal channel (5) inside which respective primary pins (6, 7) are arranged substantially mutually opposite, said channel (5) being adapted for the insertion of a key (2) provided with a seat (8) for the accommodation of a respective lever (9) which can be oriented freely and is adapted to actuate said primary pins (6, 7), characterized in that at least one of said primary pins (6) is constituted by a bushing (10) and a contoured grub (11) which has at least one segment (12a, 12b) of its contour whose shape and dimensions are complementary to those of the internal cavity (13) of said bushing (10); axially acting elastic means (14) are interposed between said bushing (10) and said grub (11) for their respective mutual spacing in conditions of absence of external forces applied to said bushing (10) toward said grub (11); said stator (3) comprises a recess (15) whose shape and dimensions are complementary

Abstract

A cylinder lock (1) and a key (2) thereof, the lock (1) comprising a stator (3) within which a rotor (4) can rotate which is provided with a longitudinal channel (5) inside which respective primary pins (6, 7) are arranged substantially mutually opposite. The channel (5) is adapted for the insertion of a key (2) provided with a seat (8) for the accommodation of a respective lever (9) which can be oriented freely and is adapted to actuate the primary pins (6, 7). At least one of the primary pins (6) is constituted by a bushing (10) and a contoured grub (11) which has at least one segment (12a, 12b) of its contour whose shape and dimensions are complementary to those of the internal cavity (13) of the bushing (10). Axially acting elastic means (14) are interposed between the bushing (10) and the grub (11) for their respective mutual spacing in conditions of absence of external forces applied to the bushing (10) toward the grub (11). The stator (3) comprises a recess (15) whose shape and dimensions are complementary to those of the terminal front, in a radial direction, of the primary pin (6) for the temporary accommodation of the front; the recess (15) is aligned with the hole (16) of the rotor (4) within which the bushing (10) and the grub (11) are arranged. At least one elastic element (17) is interposed between the stator (3) and the at least one additional primary pin (7) for the forcing thereof within the longitudinal channel (5). Following the insertion of the key (2) in the longitudinal channel (5), the end of the primary pin (7) and a head (18) of the bushing (10) abut against the lever (9), with consequent partial inclination thereof with respect to the key (2) in the configuration for free translation of the primary pin (6) within the hole (16), without protrusion of the front of the primary pin (6) within the recess (15) of the stator (3).

Description

CYLINDER LOCK AND KEY THEREOF
The present invention relates to a cylinder lock and to the key thereof.
Currently there is a cylinder lock which can be operated by means of a respective key, the characteristics of which are described in IT 1235586 dated September 6, 1989 and in EP1728944 with priority date June 1, 2005, both in the name of the same Applicant. These documents describe a cylinder lock the code of which cannot be deciphered immediately from the outside in order to hinder its tampering.
This result is obtained by arranging at least two primary pins so that they are mutually opposite, with respect to the key insertion channel, in the rotor of the cylinder, said primary pins having a respective end that protrudes into said channel.
The primary pins are associated with respective complementary pins which can translate elastically from a configuration of total accommodation within the stator to at least one configuration of simultaneous accommodation in the stator and in the rotor with consequent integral coupling of these two parts.
The key has a lever, which is accommodated so that it can rotate within a respective seat and which, when the key is inserted in the channel, actuates the primary pins, arranging them so that the complementary pins are in the configuration of total accommodation within the stator, allowing an optional movement of the rotor following a rotation of said key.
The presence of the lever in the key, associated with the at least two primary pins, ensures greater security of the lock against break-in actions generally termed picking (mechanical tampering).
In order to prevent that an ill-intentioned individual can open said cylinder lock by using an appropriate break-in tool suitable to faithfully reproduce the orientable lever at the primary pins, using mechanical tampering tools and methods of a traditional type, the possibility to code the portion of lever on which the mutually opposite pins of the lock abut has been introduced (by means of the content of EP1728944).
However, there is the need to increase security against break-ins, since the locks described so far in any case still have a tampering risk (albeit an extremely reduced one).
The aim of the present invention is to solve the problems described above, proposing a cylinder lock and the key thereof that have higher security standards against break-ins than those ensured by known technical solutions.
Within the scope of this aim, an object of the invention is to provide a cylinder lock and the key thereof that are compatible with locks and keys thereof of the known type.
Another object of the invention is to provide a cylinder lock that is constituted by a limited number of components that can be assembled in the assembly configuration in a substantially simple manner.
A further object of the present invention is to provide a cylinder lock and the key thereof that have low costs, are relatively simple to provide in practice and are safe in application.
This aim, as well as these and other objects which will become better apparent hereinafter, are achieved by a cylinder lock and a key thereof of the type comprising a stator within which a rotor can rotate which is provided with a longitudinal channel inside which respective primary pins are arranged substantially mutually opposite, said channel being adapted for the insertion of a key provided with a seat for the accommodation of a respective lever which can be oriented freely and is adapted to actuate said primary pins, characterized in that at least one of said primary pins is constituted by a bushing and a contoured grub which has at least one segment of its contour whose shape and dimensions are complementary to those of the internal cavity of said bushing; axially acting elastic means are interposed between said bushing and said grub for their respective mutual spacing without external forces applied to said bushing toward said grub; said stator comprises a recess whose shape and dimensions are complementary to those of the terminal front, in the radial direction, of said primary pin for the temporary accommodation of said front, said recess being aligned with the hole of said rotor within which said bushing and said grub are arranged; at least one elastic element is interposed between said stator and said at least one additional primary pin for the forcing thereof within said longitudinal channel; following the insertion of said key in said longitudinal channel, the end of said primary pin and a head of said bushing abut against said lever, with consequent partial inclination thereof with respect to said key in the configuration for free translation of said primary pin within said hole of said rotor, without protrusion of the front of said primary pin within said recess of said stator.
Further characteristics and advantages of the invention will become better apparent from the description of a preferred but not exclusive embodiment of the cylinder lock and of the key thereof according to the invention, illustrated by way of nonlimiting example in the accompanying drawings, wherein:
Figure 1 is a schematic longitudinal sectional side view of a cylinder lock in which the key thereof is inserted according to the invention;
Figure 2 is a sectional view, taken along the plane A-A of Figure 1, of the cylinder lock and of the key thereof of Figure 1;
Figure 3 is a sectional view, taken along the plane A-A of Figure 1, of the cylinder lock and of the key thereof of Figure 1 in a first opening step;
Figure 4 is a sectional view, taken along the plane A-A of Figure 1, of the cylinder lock and of the key thereof of Figure 1 in a second opening step;
Figure 5 is a schematic longitudinal sectional side view of a cylinder lock according to the invention in which a perforated false key is inserted; Figure 6 is a sectional view, taken along the plane B-B outlined in Figure 5, of the cylinder lock according to the invention in which a perforated false key is inserted;
Figure 7 is a sectional view, taken along the plane B-B of Figure 5, of the cylinder lock according to the invention in which a perforated false key is inserted in the locking configuration that is a consequence of a forced opening attempt;
Figure 8 is an enlarged-scale view of a detail of Figure 7;
Figure 9 is a schematic longitudinal sectional side view of a cylinder lock according to the invention in which a solid false key is inserted;
Figure 10 is a sectional view, taken along the plane C-C of Figure 9, of the cylinder lock according to the invention in which a solid false key is inserted;
Figure 11 is a sectional view, taken along the plane C-C of Figure 9, of the cylinder lock according to the invention in which a solid false key is inserted in the locking configuration that is a consequence of a forced opening attempt;
Figure 12 is a sectional view, taken along a transverse plane that passes through the axes of the primary pins, of a first cylinder lock according to the invention with a coded primary pin and a respective first key according to the invention with coded lever;
Figure 13 is a sectional view, taken along a transverse plane that passes through the axes of the primary pins, of a second cylinder lock according to the invention with a coded primary pin and a respective second key according to the invention with coded lever;
Figure 14 is a sectional view, taken along a transverse plane that passes through the axes of the primary pins, of a third cylinder lock according to the invention with a coded primary pin and a respective third key according to the invention with coded lever;
Figure 15 is a schematic longitudinal sectional side view of a cylinder lock in which a key according to the invention with incorrect lever coding is inserted;
Figure 16 is a sectional view, taken along the plane D-D of Figure 15, of the cylindrical lock according to the invention in which a key with incorrect coding of the lever is inserted;
Figure 17 is a sectional view, taken along the plane D-D of Figure 15, of the cylindrical lock according to the invention in which a key with incorrect coding of the lever is inserted in the locking configuration that is a consequence of a forced opening attempt;
Figure 18 is an enlarged-scale view of a detail of Figure 17.
With particular reference to the figures, the reference numeral 1 generally designates a cylinder lock and the reference numeral 2 designates the key thereof.
The cylinder lock 1 comprises a stator 3 within which a rotor 4 can rotate which is provided with a longitudinal channel 5 within which respective primary pins 6, 7 are substantially mutually opposite.
Both primary pins 6, 7 can slide transversely with respect to the channel 5 between respective configurations of different interference (even up to the elimination thereof) with said channel 5.
The channel 5 is adapted to receive a key 2 (inserted from the outside) provided with a seat 8 for the accommodation of a respective freely orientable lever 9.
The lever 9 is designed for the correct alignment of the primary pins 6, 7, since they are actuated by the lever 9 (on which they abut when the key 2 is inserted correctly in the channel 5) and are arranged in a specific coding configuration by it.
With particular reference to the more innovative aspects of the present invention, it is specified that at least one of the primary pins 6 can conveniently be constituted by a bushing 10 and a contoured grub 11, which has at least one segment 12a, 12b of its contour whose shape and dimensions are complementary to those of the internal cavity 13 of the bushing 10. By virtue of the presence of the segments 12a, 12b (which constitute regions with a larger diameter than the grub 11), the grub 11 and the bushing 10 can behave like a cylindrical pair in which the grub 11 can slide freely within the cavity 13 along a direction that is defined by the common axis of symmetry.
In order to ensure optimum mechanical behavior of the lock 1 according to the invention, it is specified that it is favorably possible to interpose, between the bushing 10 and the grub 11, axially acting elastic means 14 for mutual spacing in conditions of absence of external forces applied to the bushing 10 toward the grub 11.
The stator 3, in turn, comprises a recess 15 whose shape and dimensions are complementary to those of the terminal front, in a radial direction, of the primary pin 6 for the temporary accommodation of said front. The recess 15 is advantageously aligned with the hole 16 of the rotor 4 within which the bushing 10 and the grub 11 are arranged.
At least one elastic element 17 is efficiently interposed between the stator 3 and the at least one additional primary pin 7 in order to force it within the longitudinal channel 5.
When the key 2 is not inserted in the channel 5, the elastic means 14 and the elastic element 17 apply such an elastic action as to force the protrusion of the terminal end of the primary pins 6 and 7 into the longitudinal channel 5.
Following the insertion of the key 2 in the longitudinal channel 5, the end of the primary pin 7 and a head 18 of the bushing 10 abut against the lever 9, with consequent partial inclination thereof with respect to the key 2, in the configuration for free translation of the primary pin 6 within the hole 16 of the rotor 4, without protrusion of the front of the primary pin 6 (constituted by the terminal face of the grub 11 that is opposite the bushing 10) within the recess 15 of the stator 3.
Within the scope of an embodiment of unquestionable interest in practice and in application, it is specified that the hole 16 of the rotor 4 designed to accommodate the primary pin 6 can conveniently comprise consecutive portions of different diameter. In particular, it is possible to provide at least one first portion 19 that has a width that is greater than the maximum diameter of the bushing 10, at least one second portion 20 whose shape and dimensions are substantially complementary to those of the region with maximum diameter of the bushing 10, and at least one third portion 21 whose shape and dimensions are substantially complementary to those of the head 18 of the bushing 10, so as to form a cylindrical pair with it. The grub 11 can validly comprise a head segment 12b which has a diameter that is substantially similar to the diameter of the internal cavity 13 of the bushing 10 (as already shown earlier), at least one intermediate recessed portion 22 whose diameter is smaller than the diameter of the internal cavity 13 of the bushing 10, at least one intermediate segment 12a whose diameter is substantially similar to the diameter of the internal cavity 13 of the bushing 10 (also already shown earlier), and at least one terminal portion 23 whose diameter is smaller than the diameter of the internal cavity 13 of the bushing 10.
A region with a smaller diameter can be formed between the segment 12a and the segment 12b.
In this context, it is specified furthermore that the bushing 10 can in turn usefully comprise a substantially frustum-like terminal annular portion 24 whose diameter is complementary to the diameter of the at least one second extent 20 of the hole 16, a central cylindrical part 25 having a smaller diameter, and a terminal head 18 in turn provided with a cylindrical part 26 and a tapered end tab 27.
The smaller-diameter region formed between the segment 12a and the segment 12b of the grub 11 and the smaller-diameter central cylindrical part 25 of the bushing 10 have the function of facilitating the jamming of the primary pin 6 (of its components) upon an attempt to break into the lock 1. In fact, as can be seen in Figures 7, 8, 11, 17 and 18, the reduction in diameter allows the grub 11 to tilt with respect to the bushing 10 and allows the bushing 10 to tilt with respect to the hole 16, defining configurations for locking rotation if said rotation is imposed from the outside without using the appropriate key 2 according to the invention.
Furthermore, it is specified that the elastic means 14 are interposed usefully between the bottom of the cavity 13 of the bushing 10 and the at least one intermediate segment 12a having a diameter that is substantially similar to the diameter of the internal cavity 13, so as to form an abutment shoulder for said elastic means 14.
The correct and regular operation of the lock 1 according to the invention is ensured furthermore by the fact that the recess 15 of the stator 3 is delimited between two intersecting inclined planes 28 and 29, which are mutually blended at the bottom of said recess 15 and blended with the surface of the duct 30 of the stator 3 designed for the rotary accommodation of the rotor 4. From a constructive standpoint, the recess 15 can be provided by milling (or in general by chip-forming machining) of the internal surface of the duct 30 of the stator 3: the milling can be localized exclusively at an area that is aligned with the hole 16 of the rotor 4 in the assembly configuration or, more probably, extend from the terminal face of the stator 3 up to said area.
It is specified that in a particular embodiment which allows to obtain optimum security against break-ins, the lever 9 can advantageously have a thickness that is variable, even locally and with discontinuity, according to a substantially coded shape, which depends on the geometry and arrangement of the end of the primary pins 6 and 7 which are substantially aligned therewith and abut against it.
The particular shape of the lever 9 conveniently defines a particular configuration for the resting of the ends of the primary pins 6 and 7 on its surface: in practice, the ends of the primary pins 6, 7 can be shaped appropriately in order to engage in corresponding complementarity shaped regions provided on the lever 9, allowing the overall arrangement of the lock 1 and of the key 2 thereof in the open configuration only upon the correct abutment of each shaped region in the corresponding complementarily shaped region.
In this case, the bushings 10 of the primary pins 6 can have a specific shape at their head 18, so as to allow correct coupling with the shaped regions (codes) provided on the lever 9.
In particular, it is possible (as shown merely by way of nonlimiting example in Figures 12 to 18) to adopt specific bushings provided with different heads 18a, 18b and 18c, each of which is shaped specifically to mate with the shaped regions (codes) of the corresponding lever 9 of the key 2 associated with the specific lock 1.
Furthermore, it is specified that the primary pin 7 can slide advantageously within a contoured channel 31 that is present in the rotor 4 and in the stator 3 (i.e., the channel 31 is extended in a radial direction from the stator 3 into the rotor 4 until it leads into the longitudinal channel 5).
The channel 31 comprises an external rotor portion 32 and an external stator portion 33; both portions 32, 33 have a diameter that is suitable to accommodate slidingly a base plate 34 of the primary pin 7.
The channel 31 furthermore comprises an internal portion 35 (of the rotor 4 and formed between the portion 32 and the longitudinal channel 5) that has a smaller diameter and is suitable to accommodate slidingly an elongated stem 36 of the primary pin 7.
The at least one elastic element 17 can be conveniently interposed between the bottom of the channel 31 and the base plate 33.
The elastic means 14 and the elastic element 17 can be constituted by helical springs having a shape, size and elastic constant that depend on the specific mechanical behavior that one seeks to assign to the lock 1.
From a functional standpoint, it is specified that the plate 33 constitutes in practice an abutment complementary pin for the primary pin 7. Finally, it is specified that the lever 9 can have a substantially flattened shape and can be pivoted within a seat 8 which is complementary to the contour of the lever 9, at a perimetric edge thereof.
The opposite edge of the lever 9 is the one that oscillates freely between extreme configurations of protrusion from the profile of the key 2.
The operation of the invention is as follows. When the key 2 is inserted correctly and completely in the longitudinal channel 5 of the lock 1, the primary pins 6 and 7 can assume the correct arrangement, uncoupling the rotor 3 from the stator 4 and allowing opening (as shown in the accompanying Figures 2, 3, 4, 12, 13 and 14).
If instead a key X that does not correspond to the present invention (in particular provided with the seat 8 but not with the lever 9) is inserted in the channel 5, an attempt to turn the rotor 4 with respect to the stator 3 will lock the grub 11 in the bushing 10 (in accordance to what is shown by way of example in Figures 5, 6, 7 and 8), preventing the completion of the rotation.
Likewise, if one attempts to start the rotation of the rotor 4 by using a key X that does not correspond to the present invention (in particular lacking the seat 8, i.e., solid), the grub 11 jams in the bushing 10 (in accordance to what has been shown by way of example in the accompanying Figures 9, 10 and 11), preventing the completion of the rotation.
Advantageously, the present invention solves the problems described earlier, proposing a cylinder lock 1 and the key 2 thereof that have security standards against break-ins that are higher than those ensured by known technical solutions.
Conveniently, the cylinder lock 1 and the key 2 thereof are compatible with the locks and associated keys of the known type that belong to the same product category.
Positively, the cylinder lock 1 is constituted by a limited number of components that can be assembled in the assembly configuration in a substantially simple manner. Validly, the cylinder lock 1 and the key 2 thereof are relatively simple to provide in practice and substantially modest in cost: these characteristics make the lock 1 and the key 2 according to the invention innovations of assured application. The invention thus conceived is susceptible of numerous modifications and variations, all of which are within the scope of the accompanying claims; all the details may furthermore be replaced with other technically equivalent elements.
In the examples of embodiment shown, individual characteristics, given in relation to specific examples, may actually be interchanged with other different characteristics that exist in other examples of embodiment.
In practice, the materials used, as well as the dimensions, may be any according to the requirements and the state of the art.
Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.
1. A cylinder lock and a key thereof of the type comprising a stator (3) within which a rotor (4) can rotate which is provided with a longitudinal channel (5) inside which respective primary pins (6, 7) are arranged substantially mutually opposite, said channel (5) being adapted for the insertion of a key (2) provided with a seat (8) for the accommodation of a respective lever (9) which can be oriented freely and is adapted to actuate said primary pins (6, 7), characterized in that at least one of said primary pins (6) is constituted by a bushing (10) and a contoured grub (11) which has at least one segment (12a, 12b) of its contour whose shape and dimensions are complementary to those of the internal cavity (13) of said bushing (10); axially acting elastic means (14) are interposed between said bushing (10) and said grub (11) for their respective mutual spacing in conditions of absence of external forces applied to said bushing (10) toward said grub (11); said stator (3) comprises a recess (15) whose shape and dimensions are complementary to those of the terminal front, in a radial direction, of said primary pin (6) for the temporary accommodation of said front, said recess (15) being aligned with the hole (16) of said rotor (4) within which said bushing (10) and said grub (11) are arranged; at least one elastic element (17) is interposed between said stator (3) and said at least one additional primary pin (7) for the forcing thereof within said longitudinal channel (5); following the insertion of said key (2) in said longitudinal channel (5), the end of said primary pin (7) and a head (18) of said bushing (10) abutting against said lever (9), with consequent partial inclination thereof with respect to said key (2) in the configuration for free translation of said primary pin (6) within said hole (16) of said rotor (4), without protrusion of the front of said primary pin (6) within said recess (15) of said stator (3).
2. The cylinder lock and key thereof according to claim 1,

Claims

characterized in that said hole (16) of said rotor (4) that accommodates said primary pin (6) comprises consecutive portions of different diameter, at least one first portion (19) having a width that is greater than the maximum diameter of said bushing (10), at least one second portion (20) having a shape and dimensions that are substantially complementary to those of the maximum-diameter region of said bushing (10) and at least one third portion (21) having a shape and dimensions that are substantially complementary to those of said head (18) of said bushing (10) so as to define a cylindrical pair with it. 3. The cylinder lock and key thereof according to claim 1, characterized in that said grub (11) comprises a head segment (12b) having a diameter that is substantially similar to the diameter of the internal cavity (13) of said bushing (10), at least one intermediate recessed portion (22) whose diameter is smaller than the diameter of the internal cavity (13) of said bushing (10), at least one intermediate segment (12a) whose diameter is substantially similar to the diameter of the internal cavity (13) of said bushing (10), and at least one terminal portion (23) whose diameter is smaller than the diameter of the internal cavity (13) of said bushing (10).
4. The cylinder lock and key thereof according to claim 3, characterized in that said bushing (10) comprises a substantially frustum- shaped terminal annular portion (24) whose diameter is complementary to the diameter of the at least one second extent (20) of said hole (16), a central cylindrical extent (25) having a smaller diameter, and said terminal head (18) in turn provided with a cylindrical part (26) and a tapered terminal tab (27). 5. The cylinder lock and key thereof according to claim 4, characterized in that said elastic means (14) are interposed between the bottom of the cavity (13) of the bushing (10) and the at least one intermediate segment (12a) having a diameter that is substantially similar to the diameter of the internal cavity (13) of said bushing (10), which forms an abutment shoulder for said elastic means (14).
6. The cylinder lock and key thereof according to claim 1, characterized in that said recess (15) of said stator is delimited between two intersecting inclined planes (28, 29) which are mutually blended at the bottom of said recess (15) and are blended with the surface of the duct (30) of said stator (3) that is designed for the rotatable accommodation of said rotor (4).
7. The cylinder lock and key thereof according to one or more of the preceding claims, characterized in that said lever (9) has a thickness that is variable, even locally and with discontinuity, according to a substantially coded shape, which depends on the geometry and arrangement of the end of said primary pins (6, 7) which are substantially aligned with it and abut against it, defining a particular resting configuration of the ends of said primary pins (6, 7) on the surface of the lever (9).
8. The cylinder lock and key thereof according to one or more of the preceding claims, characterized in that said primary pin (7) can slide within a contoured channel (31) of said rotor (4) and said stator (3), said channel (31) comprises an external rotor extent (32) and an external stator extent (33), having a diameter suitable to accommodate slidingly a base plate (34) of said primary pin (7), and an internal extent (35), which has a smaller diameter and is suitable to accommodate slidingly an elongated stem (36) of said primary pin (7), said at least one elastic element (17) being interposed between the bottom of said channel (31) and said base plate (33).
9. The cylinder lock and key thereof according to one or more of the preceding claims, characterized in that said plate (33) constitutes an abutment complementary pin for said primary pin (7).
10. The cylinder lock and key thereof according to one or more of the preceding claims, characterized in that said lever (9) has a substantially flattened shape and is pivoted within a seat (8) which is complementary to the contour of the lever (9) at a perimetric edge thereof, the opposite edge of said lever (9) oscillating freely between extreme configurations for protrusion from the profile of the key (2).
EP20730336.3A 2020-03-05 2020-03-05 Cylinder lock and key thereof Pending EP4115036A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2020/000031 WO2021176484A1 (en) 2020-03-05 2020-03-05 Cylinder lock and key thereof

Publications (1)

Publication Number Publication Date
EP4115036A1 true EP4115036A1 (en) 2023-01-11

Family

ID=70975906

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20730336.3A Pending EP4115036A1 (en) 2020-03-05 2020-03-05 Cylinder lock and key thereof

Country Status (5)

Country Link
EP (1) EP4115036A1 (en)
CN (1) CN115315562A (en)
TW (1) TW202140905A (en)
WO (1) WO2021176484A1 (en)
ZA (1) ZA202210256B (en)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITBO20050381A1 (en) * 2005-06-01 2006-12-02 Cisa Spa CYLINDOR LOCK AND RELATIVE KEY
EP3234285A1 (en) * 2014-12-15 2017-10-25 Cisa S.p.a. Cylinder lock and associated key
IT201700028885A1 (en) * 2017-03-15 2018-09-15 Iseo Serrature Spa KEY FOR LOCK

Also Published As

Publication number Publication date
ZA202210256B (en) 2023-06-28
TW202140905A (en) 2021-11-01
CN115315562A (en) 2022-11-08
WO2021176484A1 (en) 2021-09-10

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