EP0631029A2 - Serrure cylindrique actionnée par une clé - Google Patents

Serrure cylindrique actionnée par une clé Download PDF

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Publication number
EP0631029A2
EP0631029A2 EP94108480A EP94108480A EP0631029A2 EP 0631029 A2 EP0631029 A2 EP 0631029A2 EP 94108480 A EP94108480 A EP 94108480A EP 94108480 A EP94108480 A EP 94108480A EP 0631029 A2 EP0631029 A2 EP 0631029A2
Authority
EP
European Patent Office
Prior art keywords
rotor
key
shutter
casing
cylinder lock
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.)
Granted
Application number
EP94108480A
Other languages
German (de)
English (en)
Other versions
EP0631029A3 (fr
EP0631029B1 (fr
Inventor
Hisashi C/O K. K. Tokai Rika Denki Aoki
Sadao C/O K. K. Tokai Rika Denki Kokubu
Takashi C/O K. K. Tokai Rika Denki Mizuno
Yoshiyuki C/O K. K. Tokai Rika Denki Mizuno
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.)
Tokai Rika Co Ltd
Original Assignee
Tokai Rika Co Ltd
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
Priority claimed from JP2975493U external-priority patent/JPH074730U/ja
Priority claimed from JP2975593U external-priority patent/JPH074731U/ja
Application filed by Tokai Rika Co Ltd filed Critical Tokai Rika Co Ltd
Publication of EP0631029A2 publication Critical patent/EP0631029A2/fr
Publication of EP0631029A3 publication Critical patent/EP0631029A3/fr
Application granted granted Critical
Publication of EP0631029B1 publication Critical patent/EP0631029B1/fr
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
    • E05B17/00—Accessories in connection with locks
    • E05B17/14—Closures or guards for keyholes
    • E05B17/18—Closures or guards for keyholes shaped as lids or slides
    • E05B17/181—Closures or guards for keyholes shaped as lids or slides pivoting inwardly
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B17/00—Accessories in connection with locks
    • E05B17/22—Means for operating or controlling lock or fastening device accessories, i.e. other than the fastening members, e.g. switches, indicators
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B45/00—Alarm locks
    • E05B45/06—Electric alarm locks
    • E05B45/08—Electric alarm locks with contact making inside the lock or in the striking plate
    • E05B45/10—Electric alarm locks with contact making inside the lock or in the striking plate by introducing the key or another object

Definitions

  • This invention relates to a key-operated cylinder lock having a function of detecting the presence and absence of the key.
  • a key-operated cylinder lock for instance, for an automobile door has not been put in practical use yet which includes a detecting device for electrically detecting whether the key is inserted into the rotor of the cylinder lock or it is removed therefrom; i.e., the presence or absence of the key.
  • a key-operated cylinder lock of this type is liable to be adversely affected by external conditions, because it is mounted on the outer surface of a vehicle; that is, it is exposed outside. Hence, it is, in general, difficult for the key-operated cylinder lock to have a detecting device for electrically detecting the presence or absence of the key. On the other hand, it is not always impossible to provide such a detecting device for the key-operated cylinder lock; however, the detecting device thus provided is unavoidably intricate in structure and bulky.
  • an object of this invention is to provide a key-operated cylinder lock having a function of electrically detecting the presence or absence of the key which is small in the number of components and is not bulky.
  • another object of this invention is to provide a key-operated cylinder lock which is relatively simple in construction and is able to electrically detect the presence or absence of the key with higher accuracy.
  • a key-operated cylinder lock which, according to the invention, comprises: a rotor casing including a cylindrical main portion, and an engaging portion larger in diameter than the main portion which is extended forwardly from the main portion; a rotor having a large-diameter portion on the outer cylindrical surface of the front end portion, and a key inserting channel opened in the front end face thereof, the rotor being rotatably arranged in the rotor casing with the large-diameter portion engaged with the engaging portion; a permanent magnet provided in the rotor near the key inserting channel; a magnetic shutter swingably provided in the rotor in such a manner that when the shutter is at a channel closing position to close the key inserting channel, the shutter is away from the permanent magnet, and when the shutter is swung to a channel opening position by a key inserted into the key inserting channel to open the key inserting channel, the shutter approaches the permanent magnet to concentrate the magnetic flux of the permanent magnet;
  • a key-operated cylinder lock which, according to the invention, comprises: a rotor casing; a rotor having a key inserting channel, which is rotatably arranged in the rotor casing; a permanent magnet provided in the rotor near the key inserting channel; a magnetic detecting element provided in the rotor casing in such a manner that the magnetic flux of the permanent magnet acts on the magnetic detecting element; a magnetic shutter swingably provided in the rotor in such a manner as to open and close the key inserting channel, the shutter being made of a magnetic material and adapted to interrupt the application of the magnetic flux of the permanent magnet to the magnet detecting element when the shutter is swung to a channel closing position to close the key inserting channel by a key inserted into the key inserting channel; and a spring member provided in the rotor, which is made of a non-magnetic material and is adapted to urge the shutter towards the channel closing position.
  • the rotor cover is made of a non-magnetic material. Furthermore, it is preferable that, in the case where a casing cover is provided on the front end portion of the rotor casing, the casing cover is made of a non-magnetic material.
  • the magnetic detecting element for detecting the variations of the magnetic flux of the permanent magnet is arranged in the accommodating recess formed in the rear of the rotor casing. Therefore, it is unnecessary to additionally provide a special casing for the magnetic detecting element. Furthermore, since the accommodating recess is formed in the rear of the engaging portion of the rotor casing which is larger in diameter than the main portion, the engaging portion is substantially not inflated outwardly by the formation of the accommodating recess containing the magnetic detecting element.
  • the shutter Until the key is inserted into the key inserting channel, the shutter is held at the channel closing position, and the magnetic flux of the permanent magnet acts on the magnetic detecting element.
  • the shutter is swung to the channel opening position against the elastic force of the spring member; that is, the shutter approaches the permanent magnet so that the magnetic flux of the latter is concentrated on the shutter.
  • the application of the magnetic flux of the permanent magnet to the magnetic detecting element is interrupted.
  • the magnetic flux of the permanent magnet acting on the magnetic detecting element is varied with the operation of the shutter. Hence, the presence or absence of the key can be electrically detected by detecting the variations of the magnetic flux.
  • the spring member urging the shutter towards the channel closing position will not affect the magnetic flux of the permanent magnet acting on the magnetic detecting element, because it is made of non-magnetic material.
  • both the rotor cover mounted on the front end portion of the rotor, and the casing cover mounted on the front end portion of the rotor casing are made of non-magnetic material. Hence, the rotor cover and the casing cover will not affect the magnetic flux of the permanent magnet acting on the magnetic detecting element, either.
  • the body 1 of the key-operated cylinder lock comprises: a cylindrical rotor casing 2; and a rotor 3 with a key inserting channel 3a which is rotatably arranged in the rotor casing 2.
  • the rotor casing 2 comprises: a main portion 2a; and an engaging portion 2b extended from the former 2a, forming the front end portion of the rotor casing 2.
  • the engaging portion 2b is larger in diameter than the main portion 2a.
  • a step 2c is formed inside the engaging portion 2b, while a large-diameter portion 3b is formed on the outer cylindrical surface of the front end portion of the rotor 3, so that the large-diameter portion 3b of the rotor 3 is engaged with the step 2c to prevent the backward movement of the rotor 3.
  • a magnetic detecting element namely, a reed switch 7 is provided on the outer cylindrical surface of the engaging portion 2b of the rotor casing 2 near the permanent magnet 6. More specifically, the reed switch 7 is set in its own casing 8, which is covered by a casing cover 9 mounted on the front end portion of the rotor casing 2.
  • the shutter 4 is held at a channel closing position to close the key inserting channel, and the reed switch 7 is held, for instance, turned off by the magnetic flux of the permanent magnet 6.
  • the shutter 4 When, under this condition, the key 10 is inserted into the key inserting channel 3a, the shutter 4 is swung against the elastic force of the spring member 5 to its channel opening position (as indicated by the two-dot chain lines); that is, the shutter 4 approaches the permanent magnet 6, so that the magnetic flux of the latter 6 is concentrated on the shutter 4. As a result, the application of the magnetic flux of the permanent magnet 6 to the reed switch 7 is interrupted, so that the latter 7 is turned on.
  • the magnetic flux of the permanent magnet 6 acting on the reed switch 7 varies depending on whether the shutter 4 is opened or it is closed. Therefore, the presence or absence of the key can be electrically detected by detecting the variations of the magnetic flux.
  • the key-operated cylinder lock With the above-described key-operated cylinder lock, it is necessary to use the casing 8 to provide the reed switch 7, which increases the number of components as much. Furthermore, since the casing 8 is greatly outwardly protruded from the engaging portion 2b of the rotor casing 2, the key-operated cylinder lock is bulky.
  • the spring member adapted to urge the shutter towards the channel closing position is a coil spring made of a piano wire.
  • the piano wire is generally of magnetic substance, and is positioned near the permanent magnet, so that the magnetic flux of the permanent magnet is allowed to pass through the spring member.
  • FIGS. 1 through 5 a key-operated cylinder lock of a second embodiment of the present invention applied to an automobile door will be described with reference to FIGS. 1 through 5.
  • a cylinder lock body 11 mounted on an automobile door comprises: a rotor casing 12; and a rotor 14 having a key inserting channel 13 which is rotatably provided inside the rotor casing 12.
  • the rotor casing 12 comprises: a cylindrical main portion 12a; and an engaging portion 12b extended forwardly (to the right in FIG. 1) from the former 2a, thus forming the front end portion of the rotor casing 12.
  • the engaging portion 12b is larger in diameter than the main portion 12a.
  • a step 12c is formed inside the engaging portion 12b, while a large-diameter portion 14a is formed on the outer cylindrical surface of the front end portion of the rotor 14.
  • the large-diameter portion 14a of the rotor 14 is engaged with the step 12c of the engaging portion 12b to prevent the further backward movement of the rotor 14.
  • the rotor casing 12 and the rotor 14 are made of non-magnetic material, zinc.
  • a rotor cover 15 is mounted on the front end portion of the rotor 14.
  • the rotor cover 15 has a key inserting hole 15a which is communicated with the key inserting channel 13.
  • a plurality of tumbler grooves 16 are formed in the outer periphery of the rotor 14, and tumblers (not shown) are movably arranged inside it in correspondence to the tumbler grooves 16.
  • the rotor cover 15 is made of non-magnetic stainless steel.
  • a shutter 17 is provided inside the rotor 14. More specifically, the shutter is located beside the rotor cover 15.
  • the shutter 17 is made of magnetic stainless steel, and has side plates 18 on its both edges, and pivot pins 19 on its both ends through which the shutter is mounted inside the rotor 14 in such a manner that it is swingable about the pivot pins 19.
  • a spring member 20 which is a coil spring, is provided inside the rotor 14 to urge the shutter 17 to close the key inserting channel.
  • the spring member 20 is made of non-magnetic material, for instance, beryllium copper.
  • a permanent magnet 21 is provided in contact with the spring member 20. More specifically, the permanent magnet 21 is so positioned that, when the shutter 17 is swung to its channel opening position as indicated at the two-dot chain lines in FIG. 1, it is covered by the shutter 17.
  • a casing cover 22 having a circular hole 22a at the center is mounted on the front end portion of the rotor casing 12 in such a manner that it covers the rotor 14 from the front.
  • the casing cover 22 is made of non-magnetic stainless steel, similarly as in the case of the rotor cover 15.
  • An accommodating recess 23 is formed in the outer periphery of the rotor casing 12 in such a manner that it is located behind the engaging portion 12b and near the permanent magnet 21 in the rotor 14 (cf. FIG. 4).
  • a printed circuit board 14 In the accommodating recess 23, provided are a printed circuit board 14, and a magnetic detecting element, namely, a reed switch 25 which is coupled to the printed circuit board 14.
  • the printed circuit board 14 and the reed switch 25 are sealed in the accommodating recess 23 with sealing resin 26.
  • U-shaped lead wire holders 27 and 28 are formed on the outer cylindrical surface of the main portion 12a of the rotor casing 12 in such a manner that, as shown in FIG. 5, they are shifted from each other in the direction of axis of the rotor casing 12 and are confronted with each other, so as to hold a lead wire extended from the aforementioned printed circuit board 24.
  • the magnetic flux of the permanent magnet 21 acts on the reed switch 25, so that the latter 25 is held turned off for instance.
  • the shutter 17 When, under this condition, the key 30 is inserted into the key inserting channel 13 through the key inserting hole 15a, the shutter 17 is swung by the key 30 to the channel opening position against the elastic force of the spring member 30 as indicated by the two-dot chain lines in FIG. 1. That is, the shutter 17 approaches the permanent magnet 21, so that the side plates 18 of the shutter 17 embraces the permanent magnet 21 from both sides; that is, the permanent magnet 21 is covered by the shutter 17.
  • the tumblers (not shown) are accommodated inside the rotor 14, thus permitting the rotation of the rotor 14. If, on the other hand, a key different from the key 30 is inserted into the key inserting channel, then some of the tumblers are protruded out of the tumbler grooves 16, thus inhibiting the rotation of the rotor 14.
  • the magnetic flux of the permanent magnet 21 acting on the reed switch 25 varies. Therefore, the presence or absence of the key 30 can be detected by detecting the variations of the magnetic flux.
  • the reed switch 25 for detecting the variations of the magnetic flux of the permanent magnet 21 is arranged in the accommodating recess 23 formed in the outer periphery of the rotor casing 12. Therefore, it is unnecessary to additionally provide a special casing for the reed switch 25, which decreases the number of components as much.
  • the accommodating recess 23 is formed in the rear of the engaging portion 12b of the rotor casing 12 which is larger in diameter than the main portion 12a. Therefore, the engaging portion 12b is substantially not inflated by the formation of the accommodating recess; that is, the resultant key-operated cylinder lock is not bulky.
  • the distance between the permanent magnet 21 and the reed switch 25 is substantially equal to that in the key-operated cylinder lock shown in FIG. 6. This means that the reed switch is high in detecting performance.
  • the spring member 20 adapted to urge the shutter 17 towards the channel closing position is made of non-magnetic material. Therefore, although the spring member 20 is provided in contact with the permanent magnet 21, it will not affect the magnetic flux of the permanent magnet 21 acting on the reed switch 25. This means that the reed switch 25 is improved in detecting accuracy.
  • the rotor cover 15 mounted on the front end portion of the rotor 14, and the casing cover 22 mounted on the front end portion of the rotor casing 12 are both made of non-magnetic material. That is, the rotor cover 15 and the casing cover 22 will not affect the magnetic flux of the permanent magnet 21 acting on the reed switch 25, which further improves the detecting accuracy of the reed switch 25.
  • the magnetic flux of the permanent magnet acting on the magnetic detecting element is varied as the shutter adapted to open and close the key inserting channel is operated, and the variations of the magnetic flux are detected with the magnetic detecting element, so that the presence or absence of the key is detected.
  • the spring member adapted to urge the shutter towards the channel closing position is made of non-magnetic material. Therefore, the reed switch 25 is improved in detecting accuracy.
  • the magnetic detecting element is arranged in the accommodating recess formed in the outer periphery of the rotor casing, which makes it unnecessary to additionally provide a special casing for the magnetic detecting element, and reduces the number of components as much. Furthermore, since the accommodating recess is formed in the rear of the engaging portion of the rotor casing which is larger in diameter than the main portion, the engaging portion is substantially not inflated outwardly by the formation of the accommodating recess.
  • the rotor cover mounted on the front end portion of the rotor, and the casing cover mounted on the front end portion of the rotor casing are both made of non-magnetic material.
  • the magnetic detecting element is improved in detecting accuracy.

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  • Lock And Its Accessories (AREA)
EP19940108480 1993-06-03 1994-06-01 Serrure cylindrique actionnée par une clé Expired - Lifetime EP0631029B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2975493U JPH074730U (ja) 1993-06-03 1993-06-03 キーシリンダ装置
JP2975593U JPH074731U (ja) 1993-06-03 1993-06-03 キーシリンダ装置
JP29754/93 1993-06-03
JP29755/93 1993-06-03

Publications (3)

Publication Number Publication Date
EP0631029A2 true EP0631029A2 (fr) 1994-12-28
EP0631029A3 EP0631029A3 (fr) 1995-08-30
EP0631029B1 EP0631029B1 (fr) 1999-04-07

Family

ID=26367989

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940108480 Expired - Lifetime EP0631029B1 (fr) 1993-06-03 1994-06-01 Serrure cylindrique actionnée par une clé

Country Status (2)

Country Link
EP (1) EP0631029B1 (fr)
DE (1) DE69417628T2 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2797460A1 (fr) * 1999-08-12 2001-02-16 Roger Boedec Serrure de porte de vehicule a obturateur a detection d'intrusion
DE10045224A1 (de) * 2000-09-13 2002-03-28 Bayerische Motoren Werke Ag Abdeckung für ein Fahrzeugschloss
CN102928882A (zh) * 2012-11-17 2013-02-13 无锡忻润汽车安全系统有限公司 一种汽车门锁锁体装配件检漏装置
ES2623756A1 (es) * 2016-01-11 2017-07-12 Talleres De Escoriaza, S.A. Guardapolvos para canales de llave en cilindros de cerradura

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1949806A1 (de) * 1968-10-04 1970-04-09 Uriel Erez Schloss
US3962695A (en) * 1975-07-03 1976-06-08 Lawrence Peska Associates, Inc. Magnetic key lock and alarm
US3986376A (en) * 1975-04-01 1976-10-19 Sigo Lack Lock
GB2075111A (en) * 1980-04-30 1981-11-11 Sodex Magister Cylinder lock for vehicles
GB2173542A (en) * 1985-04-12 1986-10-15 Gilardini Spa A device for detecting imperfect closure of a vehicle door
GB2187227A (en) * 1986-02-28 1987-09-03 Honda Lock Mfg Co Ltd Electronic lock and key system having key identifying function
US4996514A (en) * 1988-11-18 1991-02-26 Sadakatsu Sunami Car theft proofing system
EP0525730A1 (fr) * 1991-08-02 1993-02-03 Kabushiki Kaisha Tokai Rika Denki Seisakusho Serrure cylindrique et clef

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1949806A1 (de) * 1968-10-04 1970-04-09 Uriel Erez Schloss
US3986376A (en) * 1975-04-01 1976-10-19 Sigo Lack Lock
US3962695A (en) * 1975-07-03 1976-06-08 Lawrence Peska Associates, Inc. Magnetic key lock and alarm
GB2075111A (en) * 1980-04-30 1981-11-11 Sodex Magister Cylinder lock for vehicles
GB2173542A (en) * 1985-04-12 1986-10-15 Gilardini Spa A device for detecting imperfect closure of a vehicle door
GB2187227A (en) * 1986-02-28 1987-09-03 Honda Lock Mfg Co Ltd Electronic lock and key system having key identifying function
US4996514A (en) * 1988-11-18 1991-02-26 Sadakatsu Sunami Car theft proofing system
EP0525730A1 (fr) * 1991-08-02 1993-02-03 Kabushiki Kaisha Tokai Rika Denki Seisakusho Serrure cylindrique et clef

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2797460A1 (fr) * 1999-08-12 2001-02-16 Roger Boedec Serrure de porte de vehicule a obturateur a detection d'intrusion
WO2001012927A1 (fr) * 1999-08-12 2001-02-22 Roger Boedec Serrure de porte de vehicule a obturateur a detection d'intrusion
DE10045224A1 (de) * 2000-09-13 2002-03-28 Bayerische Motoren Werke Ag Abdeckung für ein Fahrzeugschloss
CN102928882A (zh) * 2012-11-17 2013-02-13 无锡忻润汽车安全系统有限公司 一种汽车门锁锁体装配件检漏装置
CN102928882B (zh) * 2012-11-17 2016-05-04 无锡忻润汽车安全系统有限公司 一种汽车门锁锁体装配件检漏装置
ES2623756A1 (es) * 2016-01-11 2017-07-12 Talleres De Escoriaza, S.A. Guardapolvos para canales de llave en cilindros de cerradura

Also Published As

Publication number Publication date
DE69417628D1 (de) 1999-05-12
EP0631029A3 (fr) 1995-08-30
DE69417628T2 (de) 1999-07-22
EP0631029B1 (fr) 1999-04-07

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