EP0488787B1 - Zylinderschloss - Google Patents

Zylinderschloss Download PDF

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Publication number
EP0488787B1
EP0488787B1 EP19910311119 EP91311119A EP0488787B1 EP 0488787 B1 EP0488787 B1 EP 0488787B1 EP 19910311119 EP19910311119 EP 19910311119 EP 91311119 A EP91311119 A EP 91311119A EP 0488787 B1 EP0488787 B1 EP 0488787B1
Authority
EP
European Patent Office
Prior art keywords
sleeve
key cylinder
cylinder
key
pin
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
EP19910311119
Other languages
English (en)
French (fr)
Other versions
EP0488787A1 (de
Inventor
Takeshi C/O Technical Center Of Fukusawa
Junji C/O Technical Center Of Ohkawara
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.)
Alpha Corp
Original Assignee
Alpha Corp
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 Alpha Corp filed Critical Alpha Corp
Publication of EP0488787A1 publication Critical patent/EP0488787A1/de
Application granted granted Critical
Publication of EP0488787B1 publication Critical patent/EP0488787B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05BLOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00Accessories in connection with locks
    • E05B17/04Devices for coupling the turning cylinder of a single or a double cylinder lock with the bolt operating member

Definitions

  • the present invention relates, in general, to lock devices, and more particularly, to a cylinder lock that provides significant resistance to damage or tampering.
  • a key cylinder is rotatably mounted within a casing of the lock and a proper key may be inserted into and rotated with the key cylinder from locked to unlocked position.
  • Tumblers are slidably disposed within slits formed in the key cylinder to engage with or disengage from a groove formed in a casing of the lock.
  • the tumblers engage with the groove in the casing to prevent unauthorized rotation of the key cylinder. Therefore, these locks might involve a risk of unallowed attempts to unlock or tamper by damaging the tumblers.
  • a free-turn type cylinder lock wherein the key cylinder is designed to freely rotate against unallowed attempt to unlock when rotational force is applied to the key cylinder.
  • a cylinder lock includes a sleeve rotatably arranged in the casing; and a key cylinder supported within the sleeve for rotation.
  • the tumblers within the key cylinder are moved for disengagement from the groove formed in the sleeve, and thereby the key cylinder may be rotated independently of the sleeve so that a sliding ring engages with a lock-piece operating member to actuate the lock.
  • the sleeve is kept in engaged condition by the tumblers with the key cylinder to rotate them together. This prevents rotation of the lock-piece operating member to inhibit unauthorized actuation of the lock.
  • the prior art lock has another disadvantage as it is difficult to apply same to remote locking devices utilizing radio wave or infrared ray. Furthermore, due to axial movement of the sliding ring of the lock of the above U. S. Patent along the key cylinder, another shortcoming is that the lock is large in size and become complex in structure.
  • an object of the present invention is to provide a novel cylinder lock with a key cylinder capable of freely rotating against an unauthorized attempt to unlock it.
  • the cylinder lock according to the present invention includes a casing; a sleeve rotatably disposed in the casing; a key cylinder disposed rotatably within the sleeve; tumblers slidably disposed within each slit formed in the key cylinder for engagement with the sleeve; and a connector which is drivingly connected to a lock device.
  • the cylinder lock also comprises a cam provided on the key cylinder; and at least a pin disposed radially slidably in an opening provided in the sleeve.
  • the pin is moved within the opening of the sleeve by rotation of the cam on the key cylinder independently of the sleeve to a predetermined angle when the key cylinder is turned by a proper key so that the pin comes into engagement with the connector which is then rotated together with the key cylinder to unlock the lock device.
  • the cylinder lock may comprise a return spring disposed between the sleeve and the cylinder; a first return spring disposed between the sleeve and the cylinder; and a second return spring disposed between the casing and the connector.
  • the connector has a cylindrical portion extending outwardly of the sleeve and rotatable relative to and separately of the sleeve.
  • the cylindrical portion has a resilient member provided thereon for resiliently urging the pin inwardly.
  • the tumblers in the cylinder are moved away from the sleeve for disengagement to cause the key cylinder to turn independently of the sleeve. Then, when the key cylinder is manually rotated, the cam in the key cylinder is rotated. As the pin is in abutting engagement with the cam, the pin slides radially outwardly in the opening in the stationary sleeve and is brought into engagement with the connector. Thus, the key cylinder is rotated within an angular range for sliding of the pin against elastic force of the first return spring.
  • the pin radially slides with rotation of the key cylinder against elastic force of the resilient member attached to the connector, but neither the sleeve nor the connector will turn at this time.
  • the connector is started to rotate during which the pin is rotated together with the key cylinder, sleeve and connector against elastic force of the second return spring, thereby rendering the connector to rotate into a locking or unlocking position.
  • the connector, sleeve and key cylinder are returned to their original position within the rotating range for the connector by resilient force of the second return spring between the casing and the connector.
  • the key cylinder is returned to its original position within the angular range for sliding of the pin by elastic force of the first return spring, whereby the pin is moved radially inwardly to the original position by elastic force of the resilient member.
  • the key cylinder When the key cylinder is rotated with an incorrect key, the key cylinder is retained in the engaged condition with the sleeve by means of the tumblers so that it turns together with the sleeve. Thus, since the key cylinder will not rotate relative to the sleeve, the pin will not radially move within the opening in the sleeve. Therefore, the key cylinder will not be connected to the connector via the pin, thus preventing rotation of the connector.
  • Fig. 1 is a cross-sectional view of a cylinder lock according to the present invention.
  • Fig. 2 is a cross-sectional view taken along line 2-2 of Fig. 1.
  • Fig. 3 is a cross-sectional view taken along line 3-3 of Fig. 1.
  • Fig. 4 is a cross-sectional view taken along line 4-4 of Fig. 1.
  • Fig. 5 is cross-sectional view taken along line 5-5 of Fig. 1.
  • Fig. 6 is cross-sectional view taken along line 6-6 of Fig. 1.
  • Fig. 7 is a rear view of the cylinder lock.
  • Fig. 8 is a cross-sectional view taken along line 8-8 of Fig. 7.
  • Fig. 9 is a cross-sectional view taken along line 9-9 of Fig. 7.
  • Fig. 10 is a plan view illustrating an end of the cylinder lock.
  • Fig. 11 is a partial cross-sectional view indicating the key cylinder and sleeve.
  • Fig. 12 is a cross-sectional view with the key cylinder turned with a proper key to the maximum angular position within the angular range for sliding of a pin.
  • Fig. 13 is a cross-sectional view with the key cylinder turned within the angular range of rotation of the connector.
  • Fig. 14 is a cross-sectional view with the key cylinder returned within the angular range for sliding of the pin.
  • Fig. 15 is a cross-sectional view with the key cylinder returned to a position for removing the key.
  • Fig. 16 is a cross-sectional view with the key cylinder turned to an angle of about 20° with an unacceptable key.
  • Fig. 17 is a cross-sectional view with the key cylinder turned to an angle of about 90°.
  • Fig. 18 is a cross-sectional view with the key cylinder turned to an angle of about 120°.
  • Fig. 19 is a cross-sectional view with the key cylinder turned at an angle of about 360°.
  • Fig. 20 is a cross-sectional view illustrating the relationship between the sleeve and key cylinder which has been turned by a proper key to an angle of about 20° from the position of Fig. 3.
  • Fig. 21 is a cross-sectional view illustrating the relationship between the sleeve and key cylinder which has been turned by the proper key to an angle of about 65° from the position of Fig. 3.
  • Fig. 22 is a cross-sectional view illustrating the relationship between the connector and the casing when the key cylinder has been turned by the proper key to an angle of about 65° from the position of Fig. 4.
  • the cylinder lock 10 comprises a casing 11, a sleeve 12 rotatably disposed within the casing 11, and a key cylinder 14 rotatably positioned in sleeve 12.
  • the key cylinder 14 has a plurality of tumblers 13 slidably disposed within slits 14d formed in the key cylinder 14 so that the tumblers 13 may protrude into and be engaged with groove 12a of sleeve 12, and the key cylinder 14 is retained in an engaged condition with sleeve 12 by means of tumblers 13 in a well known manner.
  • a connector 18 is rotatably attached to an inner end 14c of the key cylinder 14 for example by an E-ring 23.
  • the connector 18 has a cylindrical portion 19 positioned outside the sleeve 12 and may rotate relative to and independently of sleeve 12.
  • a radial hole 19a Formed in the cylindrical portion 19 is a radial hole 19a in which a pin 20 and a spring 21 are positioned to resiliently urge each pin 16 inwardly toward the cam 15.
  • a plate 22 is fixed to the cylindrical portion 19 to prevent detachment of the spring 21.
  • the pin 20 has its outer diameter approximately equal to that of pin 16.
  • a first return spring 17 is disposed within a space defined by an arcuate groove 14a of key cylinder 14 and arcuate groove 12c of sleeve 12.
  • Fig. 4 shows a cross-sectional view along line 4-4 of Fig. 1 in which the sleeve 12 is rotatably positioned inside the casing 11.
  • Fig. 5 shows a cross-sectional view along line 5-5 of Fig. 1 in which a latch member 30 and a spring 31 are positioned in an opening 11a formed in casing 11.
  • the latch member 30 has a claw 30a which is resiliently urged toward the outer surface of the sleeve by the spring 31.
  • a plate 32 is fixed to the casing 11 to prevent detachment of the spring 31.
  • FIG. 6 shows a cross-sectional view along line 6-6 in which a notch 14b is formed in key cylinder 14 to receive a latch member 33 and a spring 34 to elastically urge the latch member 33 outwardly.
  • a claw 33a is formed with the latch member 33 to engage with a notch 11b formed in the casing 11.
  • a second spring 34 is wound around the cylindrical portion 19 of the connector 18.
  • the cylindrical portion 19 has a notch defined by edges 19b and 19c
  • the casing 11 has a notch defined by edges 11c and 11d.
  • Ends 34a and 34b of the second spring 34 are respectively engaged with edges 19b and 19c of the cylindrical portion 19, and edges 11c and 11d of the casing 11.
  • the casing is formed with a flange 11e.
  • the connector 18 is drivingly connected to a locking mechanism such as a door lock device by a rod in a known manner.
  • the sleeve 12, key cylinder 14 and connector 18 are in the locked condition as shown in Figs. 1 through 9.
  • the tumblers 13 are moved in the key cylinder 14 for disengagement from the sleeve 12, thus permitting key cylinder 14 to rotate independently of the sleeve 12.
  • the sleeve 12 is held in a static condition due to its engagement with the latch member 30, while the pin 16 slides outwardly within the opening 12b of sleeve 12 from the inner position of Fig. 2 to the outer position of Fig. 12 by means of the rotating cam 15 of the key cylinder 14. Accordingly, the outer end of the pin 16 comes into engagement with the hole 19a formed in the cylindrical portion 19 of the connector 18.
  • the second return spring 34 positioned between casing 11 and connector 18 forcibly and elastically pushes the connector 18, sleeve 12 and key cylinder 14 to return from the rotated position of Fig. 13 to the initial position of Fig. 14 in the angular range of rotation of connector 18.
  • the key cylinder 14 is forced to return from the position of Fig. 14 to the initial position of Fig. 15 by virtue of elastic force of the first return spring 17 within the angular range for sliding of the pin 16 which is then radially and inwardly moved by elastic force of the spring 21 to the initial position.
  • the key cylinder 14 is rotated by an incorrect key, it is moved from the locked condition of Fig. 2 to the condition of Fig. 16, while the key cylinder 14 is retained in engaged condition with the sleeve 12 by tumblers 13 to rotate the key cylinder 14 and the sleeve 12 together.
  • the pin 16 will not radially move within opening 12b of sleeve 12.
  • the key cylinder 14 will not engage with connector 18 via pin 16, thus preventing rotation of the connector 18. Therefore, the sleeve 12 and key cylinder 14 are freely rotated as Figs. 17, 18 and 19 respectively indicate rotation thereof to about 90°, 120° and 360°.
  • the cylinder lock 10 allows the key cylinder 14 to turn together with sleeve 12 when an incorrect key is used to unlock, thus preventing rotation of connector 18. Therefore, no excessive external forces will be exerted on the tumblers 13, thus providing significant resistance to damage. Moreover, since the pin 16 may move radially, the key cylinder 14 may be made in reduced length for reduced size of the cylinder lock 10.
  • a single pin 16 may be utilized to connect the key cylinder 14 and the connector 18.
  • pin tumblers may be used in lieu of tumblers 13 of disk type in the above embodiment.
  • the cam 15 may be formed in an additional member which can rotate together with key cylinder 14.
  • the cylinder lock according to the present invention provides significant resistance to damage, thus effectively preventing unauthorized intrusion or theft.

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  • Lock And Its Accessories (AREA)

Claims (6)

  1. Ein Zylinderschloß (10), das ein Gehäuse (11) umfaßt; eine in besagtem Gehäuse drehbar angeordnete Buchse (12); ein in besagter Buchse drehbar angeordneter Schlüsselzylinder (14); Zuhaltungen (13) welche verschiebbar in jedem der Schlitze (14d) angeordnet sind, die in besagtem Schlüsselzylinder für den Eingriff mit der Buchse ausgebildet sind; und ein mit einer Schloß-Anordnung zur Übertragung verbundenes Verbindungsstück (18);
    gekennzeichnet durch
    einen auf dem Schlüsselzylinder (14) angeordneten Mitnehmer (15); und wenigstens einen Bolzen (16), der radial verschiebbar in einer in der Buchse (12) angebrachten Öffnung (12b) angeordnet ist, wobei besagter Bolzen in der Öffnung der Buchse bewegt wird, und zwar durch Drehung des Mitnehmers auf dem Schlüsselzylinder unabhängig von der Buchse bis zu einem vorgegebenen Winkel, wenn der Schlüsselzylinder durch einen passenden Schlüssel gedreht wird, sodaß der Bolzen in Eingriff mit dem Verbindungsstück kommt, welches dann zusammen mit dem Schlüsselzylinder gedreht wird, um die Schloß-Anordnung aufzuschließen.
  2. Ein Zylinderschloß wie es in Anspruch 1 beansprucht wird, das außerdem gekennzeichnet ist durch eine Rückstellfeder (17), die zwischen der Buchse (12) und dem Zylinder (14) angeordnet ist.
  3. Ein Zylinderschloß wie es in Anspruch 1 oder 2 beansprucht wird, das ferner gekennzeichnet ist durch eine erste Rückstellfeder (17), welche zwischen der Buchse und dem Zylinder angeordnet ist, und eine zweite Rückstellfeder (34), welche zwischen dem Gehäuse und dem Verbindungsstück angeordnet ist.
  4. Ein Zylinderschloß wie es in Anspruch 1,2 oder 3 beansprucht wird, dadurch gekennzeichnet, daß das Verbindungsstück (18) ein zylindrisches Teilstück (19) aufweist, das aus der Buchse (12) nach außen herausragt und relativ zur Buchse drehbar ist.
  5. Ein Zylinderschloß wie es in Anspruch 4 beansprucht ist, dadurch gekennzeichnet, daß das zylindrische Teilstück ein elastisches Bauteil (20,21) aufweist, das darauf angebracht ist, um den Bolzen (16) elastisch nach innen zu drücken.
  6. Ein Zylinderschloß, wie es in einem der Ansprüche 1 bis 5 beansprucht ist, dadurch gekennzeichnet, daß ein Paar Bolzen (16) radial verschiebbar in dazugehörigen Öffnungen (12b) angeordnet sind, die in der Buchse (12) angebracht sind.
EP19910311119 1990-11-30 1991-11-29 Zylinderschloss Expired - Lifetime EP0488787B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2330273A JP3017276B2 (ja) 1990-11-30 1990-11-30 シリンダ錠
JP330273/90 1990-11-30

Publications (2)

Publication Number Publication Date
EP0488787A1 EP0488787A1 (de) 1992-06-03
EP0488787B1 true EP0488787B1 (de) 1994-10-05

Family

ID=18230807

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910311119 Expired - Lifetime EP0488787B1 (de) 1990-11-30 1991-11-29 Zylinderschloss

Country Status (4)

Country Link
EP (1) EP0488787B1 (de)
JP (1) JP3017276B2 (de)
CA (1) CA2056461C (de)
DE (2) DE69104465T2 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9205835U1 (de) * 1992-05-04 1992-07-30 Niemann, Hans Dieter, 5014 Kerpen Schließzylinder
EP0650874B1 (de) * 1993-02-26 2000-07-12 Alpha Corporation Vorrichtung zur verriegelung der lenkung
US5640864A (en) * 1993-12-27 1997-06-24 Alpha Corporation Cylinder lock resistible against breaking
FR2766512A1 (fr) * 1997-07-28 1999-01-29 Euro Locks Serrure a came neutralisable
ES2168905B1 (es) * 1999-07-07 2003-11-01 Valeo Sist S De Seguridad S A Cerradura, especialmente para puerta de vehiculo, con muelle de retorno de la palanca de apertura.
JP5005459B2 (ja) * 2007-07-30 2012-08-22 株式会社東海理化電機製作所 シリンダ錠及びこれを備えた解錠装置

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2550817B1 (fr) * 1983-08-17 1988-01-08 Guitard Robert Serrure a bloc de surete et bague de fixation

Also Published As

Publication number Publication date
JP3017276B2 (ja) 2000-03-06
DE69104465D1 (de) 1994-11-10
JPH04203084A (ja) 1992-07-23
EP0488787A1 (de) 1992-06-03
CA2056461A1 (en) 1992-05-31
DE69104465T2 (de) 1995-03-02
CA2056461C (en) 1997-04-29
DE488787T1 (de) 1992-11-05

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