EP0105139A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Magnetic door locking system
Assignee: Nissan Motor Co Ltd
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Filing: 1983-08-09
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Granted: —
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Expires: 2003-08-09
Abstract
Abstract In a magnetic locking system for locking a door to a fixed member (D), comprising a key cylinder (16) connected to the door, a magnetic sensor (20) connected to the door near the key and operating when sensing a predetermined magnetic force, control means (44) for locking the door to the fixed member when the magnetic sensor operates, and a magnet-mounted key including a key proper which is to be engaged with the key cylinder and a key head (50) which is equipped with an elongate magnet piece (22), there is proposed an arrangement in which when the key is operatively engaged with the key cylinder to turn same, an imaginary plane which the axis (G 1 ) of .the magnet piece describes when the key turns about the axis (Go) of the key cylinder intersects the axis (G 2 ) of the magnetic sensor.
Inventors
- 👤 Haruo Mochida
- 👤 Keiichi Shimizu
- 👤 Shigetami Okuya
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 21:37
CPC Classifications
E; E05; E05B; E05B47/00; E05B47/0038; E05B47/0045; E05B5/00; Y; Y10; Y10T; Y10T70/00; Y10T70/70; Y10T70/7051; Y10T70/7057; Y10T70/7441; Y10T70/778; Y10T70/7791; Y10T70/7876; Y10T70/7904
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
203 words
A magnetic locking system for locking a door to a fixed member (D), comprising: a key cylinder (16) connected to said door; a magnetic sensor (20) connected to said door in the vicinity of said key cylinder, said sensor operating when a predetermined magnitude of magnetic force is applied thereto in a direction substantially parallel with a given axis (G 2 ) of said sensor; control means (44) for locking said door to the fixed member when said magnetic sensor operates; and a magnet-mounted key (10, 46, 56) including a key proper (48) which is to be engaged with said key cylinder to turn the same about its axis (G o ), and a key head (50) which has a magnet piece (22) fixed thereto, said magnet piece having at its axially opposed end portions N and S poles, respectively, wherein the positional relationship between the key cylinder, the sensor and the key is so made that when the key is operatively engaged with said key cylinder, an imaginary plane which the axis (G 1 ) of said magnet piece describes when said key truns about the axis (Go) of the key cylinder intersects the axis (G 2 ) of said magnetic sensor.
Claim 2
Dependent Claim
203 words
A magnetic locking system for locking a door to a fixed member (D), comprising: a key cylinder (16) connected to said door; a magnetic sensor (20) connected to said door in the vicinity of said key cylinder, said sensor operating when a predetermined magnitude of magnetic force is applied thereto in a direction substantially parallel with a given axis (G 2 ) of said sensor; control means (44) for locking said door to the fixed member when said magnetic sensor operates; and a magnet-mounted key (10, 46, 56) including a key proper (48) which is to be engaged with said key cylinder to turn the same about its axis (G o ), and a key head (50) which has a magnet piece (22) fixed thereto, said magnet piece having at its axially opposed end portions N and S poles, respectively, wherein the positional relationship between the key cylinder, the sensor and the key is so made that when the key is operatively engaged with said key cylinder, an imaginary plane which the axis (G 1 ) of said magnet piece describes when said key truns about the axis (Go) of the key cylinder intersects the axis (G 2 ) of said magnetic sensor.
Claim 3
Dependent Claim
78 words
A magnetic locking system as claimed in Claim 1, in which said key cylinder and said magnetic.sensor are connected to the door in such a manner that their axes are substantially perpendicular to the outer surface of said door, and in which said magnet piece is connected to said key head in such a manner that the axis of the magnet piece.is substantially perpendicular to the axis (G 3 ) of the shank portion of said key proper.
Claim 4
Dependent Claim
28 words
A magnetic locking system as claimed in Claim 1, in which said key cylinder and said magnetic sensor are mounted to an escutcheon (10) fixed to said door.
Claim 5
Dependent Claim
45 words
A magnetic locking system as claimed in Claim 3, in which said escutcheon receives therein a door handle (12), said door handle being linked to door latching mechanism so that when the handle is gripped, the latching mechanism unlatches the door from the fixed member.
Claim 6
Dependent Claim
32 words
A magnetic locking system as claimed in Claim 4, in which said magnetic sensor is housed in a case (40) which is tightly disposed in a recess (10B) formed in said escutcheon.
Claim 7
Dependent Claim
19 words
A magnetic locking system as claimed in Claim 5, in which said case receives therein said control means (44).
Claim 8
Dependent Claim
23 words
A magnetic locking system as claimed in Claim 6, in which said case is secured to said escutcheon by means of bolts (42).
Claim 9
Dependent Claim
133 words
8_. A magnetic locking system as claimed in Claim 1, in which said magnet-mounted key comprises: a key plate proper (48) including a shank portion (48B) acutally engaged with said key cylinder, and an enlarged head portion (48A); a magnet piece (22) having therethrough an opening (22A) through which said shank portion of the key plate proper passes so that one side of said magnet piece is in contact with one side of said enlarged head portion of the key plate proper; stopper means (52, 48D) for tightly holding said magnet piece on said shank portion; and a key head (50) of plastics, the plastic key head being moulded on the key plate proper so as to cover said enlarged head portion (48A), the magnet piece (22) and said stopper means (52, 48D).
Claim 10
Dependent Claim
52 words
A magnetic locking system as claimed in Claim 8, in which said magnet piece is connected to said key plate proper in such a manner that the axis (G1) thereof which passes through N and S poles thereof is substantially perpendicular to the longitudinal axis (G 3 ) of said shank portion.
Claim 11
Dependent Claim
47 words
A magnetic locking system as claimed in Claim 9, in which the enlarged head portion of said key plate proper is formed with recesses (48C) filled with the plastics of the key head thereby to assure bonding of the plastic key head to the key plate proper.
Claim 12
Dependent Claim
44 words
A magnetic locking system as claimed in Claim 10, in which said stopper means is a stopper plate (52) which has an opening (52A) through which the shank portion of the key plate is snugly inserted and brought into contact with the magnet piece.
Claim 13
Dependent Claim
74 words
A magnetic locking system as claimed in Claim 11, in which said stopper plate (52) is formed with pawls (52B) at opposed sides of the opening thereof, the leading ends of the pawls being raised from the major portion of said stopper plate so that upon assembly thereof on said shank portion, said stopper plate is in contact with one side of said magnet piece with the pawls resiliently engaged with said shank portion.
Claim 14
Dependent Claim
27 words
A magnetic locking system as claimed in Claim 12, in which said magnet piece is snugly put in a shallow recess (22B) formed in said magnet piece.
Claim 15
Dependent Claim
28 words
A magnetic locking system as claimed in Claim 10, in which said stopper means comprises projections (48D) integrally formed on said shank portion of the key plate proper.
References Cited (Backward Citations)
No citation records indexed.
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