EP1377720B1 - Tumbler lock - Google Patents

Tumbler lock Download PDF

Info

Publication number
EP1377720B1
EP1377720B1 EP02708388A EP02708388A EP1377720B1 EP 1377720 B1 EP1377720 B1 EP 1377720B1 EP 02708388 A EP02708388 A EP 02708388A EP 02708388 A EP02708388 A EP 02708388A EP 1377720 B1 EP1377720 B1 EP 1377720B1
Authority
EP
European Patent Office
Prior art keywords
lock
lock bolt
tumbler
movement
force transmitting
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.)
Expired - Lifetime
Application number
EP02708388A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1377720A1 (en
Inventor
Marko Lindström
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.)
Bjorkboda Las Oy AB
Original Assignee
Bjorkboda Las Oy AB
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 Bjorkboda Las Oy AB filed Critical Bjorkboda Las Oy AB
Publication of EP1377720A1 publication Critical patent/EP1377720A1/en
Application granted granted Critical
Publication of EP1377720B1 publication Critical patent/EP1377720B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B21/00—Locks with lamelliform tumblers which are not set by the insertion of the key and in which the tumblers do not follow the movement of the bolt e.g. Chubb-locks

Definitions

  • the invention relates to a tumbler lock in accordance with the preamble of claim 1.
  • Tumbler locks according to the present invention are used for instance as security locks in doors. While the security requirements are getting more stringent, a great number of additional key alternatives of various kinds are needed. In principle this can be achieved e.g. by adding the number of tumbler discs or stepping alternatives for combination surface millings, i.e. the number of combination values. Both the size of the key and the lock must, however, be kept reasonable and the decreased stepping of millings might, for its part, cause malfunctions and erroneous openings.
  • the picking of locks should also be as difficult as possible.
  • the locking channel of the tumbler discs utilized in these locks conventionally includes a straight branch interconnecting the locking branches and extending in the direction of the transfer movements of the lock bolt.
  • it is sufficient for picking the lock to arrange the tumbler discs so that the connecting branches for their respective locking channels coincide with the position of the locking pin.
  • the lock bolt can be pressed to its opening position while the locking pin moves directly through the locking channel branch in question.
  • the key blade comprises a guide member, which affects the lock bolt at the final stage of the selecting movement of the tumbler disc so that it guides the locking pin into the branch interconnecting the locking branches of the locking channel.
  • the third branch of the locking channel comprises at least one guiding member to guide the locking pin at the same time with the transfer movement of the lock bolt and the selecting movement of the tumbler disc.
  • FR 2663072 A discloses a tumbler lock according to the preamble of claim 1.
  • US 1544389 A1 describes a lock in which a bolt includes a latch tumably journalled thereto and provided with a gravity catch cooperating with a set of tumbler discs each provided with a slot.
  • the tumbler discs provide the opening combination for the lock and also pull the bolt into the lock casing when actuated by the key.
  • a stop member on the inner side of lock casing prevents inward movement of the bolt.
  • US 1935225 A1 describes a lock having a plurality of tumbler discs provided with slots, and an abutment member carried on a lever pivoted to the lock casing for engaging one of the slots to block the tumbler disc and the bolt.
  • the object of the present invention is to provide a tumbler lock, the picking of which can be prevented more reliably than before.
  • a tumbler lock according to the present invention comprises a lock casing or similar including a plurality of tumbler discs provided with locking channels, a lock bolt and a locking pin or similar, arranged in force transmitting connection with the lock bolt and in interaction with the locking channels of the tumbler discs.
  • the tumbler lock also comprises a separate force transmitting member for providing force transmitting connection between the lock bolt and the locking pin or similar.
  • the force transmitting member is movably mounted in the lock bolt so that it has a determined freedom of movement and the locking pin is arranged in the force transmitting member.
  • the force transmitting member is preferably arranged in operative communication with the lock bolt so that their lateral surfaces face each other and a mechanical guide system is provided for guiding their reciprocal movement.
  • This guide system determines the limits for and/or the direction of the movement between the lock bolt and said force transmitting member.
  • the mechanical guide system comprises at least one pin and guide groove combination or similar arranged to guide the force transmitting member in a direction deviating from the direction of movement of the lock bolt.
  • Blocking members are arranged in the lock casing, in the vicinity of the lock bolt, and the force transmitting member comprises a detent or similar members arranged by means of the movement between the force transmitting member and the lock bolt to interact with the blocking members so that the force exerted on the lock bolt and parallel with its direction of movement can be transmitted to the lock casing by means of said members.
  • a tumbler lock according to the invention comprises members on the other side of the lock bolt for transforming the turning movement of the key to a linear movement of the lock bolt, whereby the detent or similar members of the force transmitting member are preferably arranged on the opposite side of the lock bolt with respect to said members of the lock bolt.
  • the reference number 1 indicates a tumbler lock comprising a lock casing 2 or similar, where several tumbler discs 3 equipped with locking channels 4 are provided.
  • the lock comprises a lock bolt 5 movably mounted in the direction of its longitudinal axis in the lock casing 2.
  • the tumbler lock comprises further a locking pin 6 or similar arranged in force transmitting connection with the lock bolt 5 so that the force exerted on the lock bolt and parallel with its direction of movement can be transmitted to the tumbler discs 3 via the locking pin 6.
  • the locking pin 6 is arranged to interact with the locking channels 4 of the tumbler discs.
  • the tumbler discs are arranged in the lock casing 2 in a way known per se by means of elongated guide openings 3' to be moved in a transversal direction with respect to the lock bolt's direction of movement and against the pressure of spring means.
  • Fig. 1 depicts the initial position of the tumbler lock 1 according to the invention in locked position.
  • the lock comprises a separate force transmitting member 7 for providing force transmitting connection between the lock bolt 5 and the locking pin 6.
  • the force transmitting member is called a detent plate.
  • the detent plate 7 is arranged in force transmitting connection with the lock bolt 5 allowing a specific reciprocal movement between them.
  • the elements are located so that their lateral surfaces face each other.
  • a mechanical guide system 8 is provided for guiding their reciprocal movement comprising pairs of pins and guide grooves or similar and determining the limits for and/or the direction of movement between the lock bolt 5 and the detent plate 7.
  • two pins 8' are arranged in the lock bolt 5 and correspondingly, two grooves or elongated holes 8" in the detent plate 7.
  • the direction of the grooves 8" is such that the movement between the lock bolt 5 and the detent plate 7 deviates from the direction of movement of the lock bolt.
  • the detent plate 7 comprises a detent 10 or similar members, which can be arranged by means of the movement between the detent plate 7 and the lock bolt 5 to interact in a picking situation.
  • the lower edge of the lock bolt 5 is provided with a guide surface 11 for a key for transforming the turning movement of the key to a linear movement of the lock bolt, and the detent 10 of the detent plate 7 is arranged on the opposite side of the lock bolt with respect to the guide surface 11 for the key.
  • the locking pin 6 is arranged on the detent plate 7, whereby the pressing force exerted on the lock bolt 5 from outside makes the detent plate 7 actuated by the guide system 8 to move in such a way that the detent 10 hits the blocking members 9 and the movement of the lock bolt is prevented (cf. Fig. 2).
  • the force exerted on the lock bolt by the interaction of the detent 10 and the blocking members 9 and being parallel with the lock bolt's direction of movement can be transmitted to the lock casing and the force exerted on the tumbler discs 3 via the dead-locking pin 6 will cease.
  • the arrangement according to the invention is applicable in all necessary opening phases of the lock.
  • the number of blocking members is preferably one less than the number of locking channel branches parallel with the direction of movement of the tumbler discs.
  • the picking of the lock can be impeded efficiently.
  • the lock bolt is exposed to a load that presses the lock bolt inwards, whereby the locking pin is pressed against the edge of the locking channel of the tumbler disc that prevents the movement of the lock bolt.
  • Fig. 2 depicts the situation while a picking attempt is in progress.
  • the essential element in the present solution is the detent plate 7 attached to the lock bolt 5 or in association therewith, which plate is loaded by a spring 12 against the lock bolt in such a way that the spring urges the detent plate 7 away from the end of the lock bolt 5 protruding from the lock. Since the locking pin 6 is arranged in the detent plate 7, the external pressing force exerted on the lock bolt is transmitted at the first stage to the tumbler discs 3 via the detent plate 7. When the lock bolt is exposed to a load for instance through the keyhole pushing the lock bolt backwards, the locking pin 6 is pressed against one or more tumbler discs 3. This is also the case if a wrong key inserted through the keyhole causes the load.
  • the tumbler discs would have risen even before the movement of the lock bolt to a position allowing free movement of the lock bolt.
  • the detent plate 7 always remains immobile with respect to the lock bolt, when the right key is used.
  • Fig. 3 also depicts a picklock or similar 13, by which the probing of the tumbler discs is attempted.
  • the present invention makes it impossible to determine by probing the position of the branch 4 parallel with the movement of the lock bolt in the locking channel of the tumbler discs 3, since the tumbler disc is at this stage moving without any load by the lock pin 6.
  • This can be made even more efficient by designing locking channels 4 in the tumbler discs and the locking pin 6 so that the contact of the locking pin 6 with the tumbler disc 3 is easily released, when the tumbler disc is probed, i.e. lifted.

Landscapes

  • Lock And Its Accessories (AREA)
  • Measuring Or Testing Involving Enzymes Or Micro-Organisms (AREA)
  • Acyclic And Carbocyclic Compounds In Medicinal Compositions (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Preventing Unauthorised Actuation Of Valves (AREA)
  • Connection Of Plates (AREA)
  • Meat, Egg Or Seafood Products (AREA)
  • Casings For Electric Apparatus (AREA)
  • Lubricants (AREA)
  • Pens And Brushes (AREA)
EP02708388A 2001-04-10 2002-03-20 Tumbler lock Expired - Lifetime EP1377720B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FI20010743A FI109224B (sv) 2001-04-10 2001-04-10 Tillhållarlås
FI20010743 2001-04-10
PCT/FI2002/000232 WO2002084054A1 (en) 2001-04-10 2002-03-20 Tumbler lock

Publications (2)

Publication Number Publication Date
EP1377720A1 EP1377720A1 (en) 2004-01-07
EP1377720B1 true EP1377720B1 (en) 2006-11-22

Family

ID=8560957

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02708388A Expired - Lifetime EP1377720B1 (en) 2001-04-10 2002-03-20 Tumbler lock

Country Status (7)

Country Link
EP (1) EP1377720B1 (sv)
AT (1) ATE346207T1 (sv)
DE (1) DE60216252D1 (sv)
FI (1) FI109224B (sv)
NO (1) NO336607B1 (sv)
RU (1) RU2283934C2 (sv)
WO (1) WO2002084054A1 (sv)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013006044U1 (de) 2013-07-05 2013-08-05 Kfv Karl Fliether Gmbh & Co. Kg Zuhaltung oder Rückdrücksperre
RU2648626C1 (ru) * 2017-02-16 2018-03-26 Общество с ограниченной ответственностью "МЕТТЭМ-ПРОИЗВОДСТВО" Замок и устройство механизма замка

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
UA105079U (uk) * 2012-12-04 2016-03-10 Кале Кіліт Ве Каліп Санайі А.С. Механізм блокування для сувальдного замка

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1544893A (en) * 1924-05-22 1925-07-07 Charles J Diebold Lock
US1935225A (en) * 1933-05-20 1933-11-14 American Hardware Corp Lock
GB1480585A (en) * 1974-07-16 1977-07-20 Squire & Sons H Sliding bolt assemblies
IT221407Z2 (it) * 1990-06-08 1994-03-16 Conforti Spa Serratura a chiave cambiabile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202013006044U1 (de) 2013-07-05 2013-08-05 Kfv Karl Fliether Gmbh & Co. Kg Zuhaltung oder Rückdrücksperre
RU2648626C1 (ru) * 2017-02-16 2018-03-26 Общество с ограниченной ответственностью "МЕТТЭМ-ПРОИЗВОДСТВО" Замок и устройство механизма замка

Also Published As

Publication number Publication date
ATE346207T1 (de) 2006-12-15
RU2283934C2 (ru) 2006-09-20
FI20010743A0 (sv) 2001-04-10
EP1377720A1 (en) 2004-01-07
RU2003132551A (ru) 2005-01-10
FI109224B (sv) 2002-06-14
WO2002084054A1 (en) 2002-10-24
NO20034539L (no) 2003-12-10
NO20034539D0 (no) 2003-10-09
NO336607B1 (no) 2015-10-12
DE60216252D1 (de) 2007-01-04

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