CN101881102B - Self-locking fingerprint electronic lock - Google Patents

Self-locking fingerprint electronic lock Download PDF

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Publication number
CN101881102B
CN101881102B CN 201010156261 CN201010156261A CN101881102B CN 101881102 B CN101881102 B CN 101881102B CN 201010156261 CN201010156261 CN 201010156261 CN 201010156261 A CN201010156261 A CN 201010156261A CN 101881102 B CN101881102 B CN 101881102B
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CN
China
Prior art keywords
contact
cam
lock
dead bolt
bolt
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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 - Fee Related
Application number
CN 201010156261
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Chinese (zh)
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CN101881102A (en
Inventor
马一杰
Original Assignee
马一杰
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Filing date
Publication date
Application filed by 马一杰 filed Critical 马一杰
Priority to CN 201010156261 priority Critical patent/CN101881102B/en
Publication of CN101881102A publication Critical patent/CN101881102A/en
Application granted granted Critical
Publication of CN101881102B publication Critical patent/CN101881102B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The invention provides a self-locking fingerprint electronic lock, which comprises a lock body, a small bolt, a large bolt, world pole hangers, a transmission component, an electric drive part and a manual drive part, wherein the small bolt, the large bolt, the world pole hangers, the transmission component and the electric and manual drive parts are arranged on the lock body; a lock rod of the small bolt is provided with a spring; the lock rod of the large bolt is provided with the spring, while a bolt body is provided with a sliding chute; each world pole hanger is provided with the sliding chute; and the transmission component and the electric and manual drive parts are connected with the small bolt, the large bolt and the world pole hangers. The self-locking fingerprint electronic lock is characterized in that: the lock rod of the small bolt is provided with a rotary touch rod which is matched and connected with a turntable arranged on the lock body; the turntable is connected with an automatic slide block through a connecting rod; and the automatic slide block is matched and connected with a clamping groove on the bolt body of the large bolt. Besides maintaining the conventional functions, of realizing unlocking by fingerprint identification and password input and also by a key, of a fingerprint coded lock, the self-locking fingerprint electronic lock realizes the automatic locking of the small bolt, the large bolt and the world pole hangers at the same time when a door is unlocked and closed in a way that the small bolt touches a doorframe and is retracted to drive the matching and connection between the rotary touch rod on the small bolt and the turntable and the matching and connection between the automatic slide block and the sliding chute on the bolt body of the large bolt.

Description

Self-locking fingerprint electronic lock
Technical field
The present invention relates to a kind of fingerprint electronic lock, especially a kind of triggering is self-locking fingerprint electronic lock, belongs to door lock design and manufacturing technology field.
Background technology
The fingerprint electronic lock that uses at present both can be finished and unblanked by reading, identify fingerprint and encrypted message, also can finish and unblanked by rotating key, and its security reliability is higher, can register one's residence for people, going on a journey provides reliable guarantee.But existing this class lockset, open the door register one's residence after, also need manual operation could pin safely door, in case forget operation, then can stay potential safety hazard.Therefore, be necessary prior art is improved.
Summary of the invention
Be locked in for overcoming existing fingerprint electron that opening the door registers one's residence brings operation inconvenience afterwards because not automatically locking, even have the deficiency such as potential safety hazard, the invention provides a kind of highly reliable triggering is self-locking fingerprint electronic lock.
The present invention finishes by following technical proposal: a kind of self-locking fingerprint electronic lock, comprise lock body, be arranged on the lock body: on its locking bar with the little dead bolt of spring, be with spring on its locking bar, on the tongue body with the large dead bolt of chute, universe rod with chute on it is linked up with, and the transmission component and the electronic and manual actuation part that connect them, the locking bar that it is characterized in that little dead bolt is provided with the rotation touching lever, the rotation touching lever is matched with the rotating disk that is arranged on the lock body, rotating disk links to each other with automatic slider by connecting rod, automatic slider is matched with the draw-in groove on the large dead bolt tongue body, so that by connecting of the rotation touching lever on the little dead bolt locking bar and rotating disk, and the connecting of the draw-in groove on automatic slider and the large dead bolt tongue body, after unblanking to enter, automatically finish large dead bolt, automatically locking of little dead bolt and universe rod hook.
Rotation touching lever on the described little dead bolt locking bar is made as the bifurcation font bar with three contacts, wherein a contact is made as level contacts, this contact is hinged on the locking bar by hinge, contact end links to each other with extension spring on being fixed on locking bar, two contacts in addition are made as respectively contact up and down, so that the rotation touching lever rotate and makes the contact introversion that makes progress around hinge under external force, by the extension spring that links to each other with the rotation touching lever it being gone back to again when external force is removed resets, makes progress and the contact flare thereby make.
Described rotating disk is made as a circular discs, hinge by the center is hinged on the lock body, the edge of rotating disk is provided with a plush copper that matches to upper contact head with the rotation touching lever, be fixed with connecting rod and extension spring on the rotating disk, the extension spring other end is fixed on the lock body, the connecting rod other end links to each other with automatic slider, the automatic slider other end is provided with the arc surface electric contact that matches with draw-in groove on the large dead bolt tongue body, so that the plush copper that the contact top that makes progress by the rotation touching lever is under external force bumped on the rotating disk makes dial rotation, move horizontally with connecting rod and the automatic slider that drives on the rotating disk, thereby automatic slider is separated with large dead bolt, after removing, external force makes the rotating disk revolution by the extension spring on the rotating disk again, thus drivening rod, the automatic slider travelling backwards.
Described transmission component comprise with coaxial its of handle axle on establish the handle cam of contact and the cam one of unblanking, be installed in the large deadbolt cam of establishing contact on the lock body its by axle, be hinged on the cam two of unblanking of establishing contact on the large dead bolt tongue body its by axle, with the lock core thumb wheel of establishing contact on its of lock pin coaxial, wherein:
Unblank the first contact outer end of cam one be provided with little dead bolt locking bar on rotation touching lever and the inclined-plane that matches of block, the second contact is matched with the contact of the cam two of unblanking, so that when unblanking cam one rotation, promotes little dead bolt and locking bar is retracted mobile by contact;
The first contact on the handle cam is matched with large deadbolt cam, and the second contact is made as the flexible contact matched with motor-driven jacking block, so that during the rotation of handle cam, by the cooperation between contact, promotes large deadbolt cam and rotates;
First, second contact on the large deadbolt cam matches with handle cam contact and lock core thumb wheel contact respectively, and the 3rd contact places in the large dead bolt tongue body chute by the traveller on it, retracts mobile so that large dead bolt is finished it when rotating with large deadbolt cam;
The cam two of unblanking is fixed on the large dead bolt, the first contact on it is matched with the second contact of the contact one of unblanking, the second contact and lock core thumb wheel are matched, the traveller of unblanking simultaneously on the cam two places in the universe rod hook chute of its outer end buckle, so that when the lock core thumb wheel rotates, by the cooperation between contact, make unblank cam two and cam one rotation of unblanking, thereby finish unblanking of little dead bolt, the time the coexist cam two of unblanking finish in the process that large dead bolt unblanks with large dead bolt retraction, by the movement of the traveller on the cam two of unblanking in universe rod hook chute, it is mobile and unblank to make the universe rod hook finish synchronously retraction;
Contact on the lock core thumb wheel respectively with large deadbolt cam on the contact of contact, the cam two of unblanking matched, when its rotation first lap, elder generation is matched with the contact on the large deadbolt cam, when its rotation second circle, matched with the contact of the cam two of unblanking again, so that the lock core thumb wheel is when the rotation first lap, by the cooperation between contact, it is mobile to make large deadbolt cam rotate and finish large dead bolt retraction, the lock core thumb wheel is when rotation the second circle, by the cooperation between contact, make the cam two and unblank cam one to rotate and the retraction of finishing little dead bolt is moved of unblanking.
Described motorized motions part comprises the scroll bar that links to each other with motor, the driving spring that links to each other with push rod with scroll bar respectively, push rod matches with the flexible contact of handle cam, so that under motor-driven, after making flexible contact retraction by scroll bar, driving spring, push rod, make the handle cam in running order, rotating handles can be opened large and small dead bolt.
Described manual actuation part comprise spoon axle and on the lock core thumb wheel, the large deadbolt cam matched with the lock core thumb wheel respectively, the cam two of unblanking, so that when insertion key and a rotation spoon axle turned for the first week, making the lock core thumb wheel drive first large deadbolt cam by the second contact rotates, and make the 3rd contact on the large deadbolt cam drive large dead bolt retraction and finish unblanking of large dead bolt, link up with connecting of chute by the traveller on the cam of unblanking and universe rod simultaneously, make the synchronous retraction of universe rod hook and finish unblanking of universe rod hook, when rotating again spoon axle second week, the lock core thumb wheel is driven unblank cam to rotate, finish unblanking of little dead bolt by the little dead bolt retraction of the actuated by cams handle cam driven of unblanking.
The present invention compared with prior art has following advantages and effect: adopt such scheme, except having kept finger-print puzzle lock original, both can pass through fingerprint recognition, Password Input is finished and is unblanked, also can by key finish unblank outside, when after unblanking to enter, closing the door, when bouncing back when little dead bolt touching doorframe, by connecting of the rotation touching lever on the little dead bolt locking bar and rotating disk, and the connecting of the chute on automatic slider and the large dead bolt tongue body, finish little dead bolt, automatically locking of large dead bolt and universe rod hook, need not again manual locking, fundamentally solved the rear operation inconvenience that brings because not automatically locking of entering, and because forgetting the deficiencies such as bringing potential safety hazard of locking, be that a highly reliable triggering is the fingerprint electronic lock of automatic locking in fact.
Description of drawings
Fig. 1 is the present invention's structural representation;
Fig. 2, Fig. 3 are the cam structure schematic diagram of unblanking among Fig. 1;
Fig. 4, Fig. 5 are the handle cam structure schematic diagram among Fig. 1;
Fig. 6 is the large lock bolt structure schematic diagram among Fig. 1;
Fig. 7, Fig. 8 are the large deadbolt cam structural representation among Fig. 1.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described further.
Automatic locking fingerprint electronic lock provided by the invention, comprise lock body 1, be arranged on the lock body 1: on its locking bar 92 with the little dead bolt 9 of spring 91, band spring 112 on its locking bar 111, band chute 113 on the tongue body 114,115 large dead bolt 11, up and down two universe rods with chute 131 on it link up with 13, and the transmission component and motorized motions part 10 and the manual actuation part 3 that connect them, locking bar 92 at little dead bolt 9 is provided with rotation touching lever 94, rotation touching lever 94 is matched with the rotating disk 5 that is arranged on the lock body 1, rotating disk 5 links to each other with automatic slider 54 by connecting rod 52, automatic slider 54 is matched with the draw-in groove 116 on the large dead bolt tongue body 114, wherein: rotation touching lever 94 is made as the bifurcation font bar with three contacts, level contacts wherein is hinged on the locking bar 94 by hinge, the level contacts end links to each other with extension spring 95 on being fixed on locking bar 94, two contacts in addition are respectively contact up and down, the plush copper 51 of contact upwards and rotating disk 5 is matched, downward contact is matched with the contact inclined-plane 72 of the cam 7 of unblanking, such as Fig. 1, Fig. 2; Rotating disk 5 is made as a circular discs, hinge by the center is hinged on the lock body 1, the edge of rotating disk 5 is provided with the plush copper 51 that a contact that makes progress with rotation touching lever 94 matches, be fixed with connecting rod 52 and extension spring 53 on the rotating disk 5, extension spring 53 other ends are fixed on the lock body 1, connecting rod 52 other ends link to each other with automatic slider 54, and automatic slider 54 other ends are provided with the arc surface electric contact 55 that matches with draw-in groove 116 on large dead bolt 11 tongue bodies 114, such as Fig. 1.(this moment, large dead bolt 11 was in retracted position after entering when unblanking, little dead bolt 9 is in extended position), little dead bolt 9 is run into doorframe and is retracted together with locking bar 92 and move in the lock body 1 when closing the door, in the retraction process, be installed in leaning outward because of the pulling force that is subjected to extension spring 95 to upper contact head of rotation touching lever 94 on little dead bolt 9 locking bars 92, and collide with the contact 51 on the rotating disk 5, thereby driving rotating disk 5 turns clockwise, while drivening rod 52, extension spring 53 and automatic slider 54 are moved to the left, make the arc surface electric contact 55 of automatic slider 54 right-hand members break away from large dead bolt 11 draw-in grooves 116, then large dead bolt 11 ejects lock body 1 under spring 112 effects on its locking bar 111, simultaneously by being hinged on the movement of slide-bar 122 in universe rod is linked up with 13 chutes 131 on the cam 2 12 of unblanking on the large dead bolt tongue body 114, make two universe rod hooks 13 also eject simultaneously lock body, thereby door is locked, little dead bolt 9 ejects lock body 1 and enters in the lockhole on the doorframe when locking under the effect of locking bar 92 upper springs 91, locking bar 92 and on rotation touching lever 94 also thereupon mobile, rotating disk 5 goes back under extension spring 53 effects counterclockwise, make connecting rod 52, automatic slider 54 moves right to original position (resetting), thereby after unblanking to enter, automatically finish and lock.
Described transmission component comprise with coaxial its of handle axle 6 on establish the handle cam 8 of contact and the cam 1 of unblanking, be installed in the large deadbolt cam 4 of establishing contact on the lock body 1 its by axle 61, be hinged on the cam 2 12 of unblanking of establishing contact on large dead bolt 11 tongue bodies 114 its by axle, with the lock core thumb wheel 31 of establishing contact on coaxial its of lock core 3, such as Fig. 1, wherein:
Unblank the first contact outer end of cam 1 be provided with little dead bolt 9 locking bars 92 on rotation touching lever 94 and block 93 inclined-plane 72, the plane 71 of matching, the second contact 73 is matched with the contact 121 of the cam 2 12 of unblanking, when cam 1 rotates in order to unblank, it is mobile to retract by the contact plane 71 little dead bolts 9 of promotion and locking bar 92, such as Fig. 1, Fig. 2, Fig. 3;
The first contact 81 on the handle cam 8 is matched with large deadbolt cam 4, the second contact 82 is arranged on by spring in the contact apertures 83 of handle cam 8 and consists of the contact that stretches, and matched with motor-driven jacking block 10, so that during 8 rotation of handle cam, promote large deadbolt cam 4 by contact 81 and rotate, such as Fig. 1, Fig. 5, Fig. 6;
The first contact 41, the second contact 42 on the large deadbolt cam 4 match with handle cam 8 contacts 81 and lock core thumb wheel 31 contacts respectively, the 3rd contact 43 places in large dead bolt 11 tongue bodies 114 chutes 113 by the traveller 44 on it, so that large dead bolt 11 is when rotating with large deadbolt cam 4, by cooperating of the chute 113 on it and traveller 44, it is mobile to make it finish retraction, such as Fig. 1, Fig. 7, Fig. 8;
The cam 2 12 of unblanking is fixed on large dead bolt 11 tongue bodies 114 by axle 117, the first contact 121 on it is matched with the second contact 73 of the contact 1 of unblanking, the second contact 123 is matched with the contact of lock core thumb wheel 31, unblank simultaneously traveller 122 on the cam 2 12 places in the chute 131 of universe rod hook 12 of its outer end buckle 132, such as Fig. 1.
Described motorized motions part comprises the scroll bar 103 that links to each other with motor 101, the driving spring 102 that links to each other with push rod 10 with scroll bar 103 respectively, push rod 10 matches with the flexible contact 82 of handle cam 8, with convenient fingerprint recognition, after Password Input is legal, rotate by identifier starter motor 101, under motor 101 drives, by scroll bar 103, driving spring 102, after push rod 10 makes flexible contact 101 retractions, make handle cam 8 in running order, be that swing handle 6 is when unblanking, make the coaxial cam 1 of unblanking, handle cam 8 together rotates thereupon, by the contact plane 71 of the cam 1 of unblanking and connecting of block 93, little dead bolt 9 and locking bar 92 are retracted move and open little lock, contact 41 on contact by on the handle cam 8 81 and the large deadbolt cam 4 connecting simultaneously, drive large deadbolt cam 4 inhours and rotate, drive large dead bolt 11 and universe rod hook 13 by the movement of traveller 44 on the contact 43 in large dead bolt 11 chutes 113 and also retract to move and finish electronic unblanking, such as Fig. 1.
Described manual actuation part comprises the lock core 3 lock core thumb wheel 31 on it, the large deadbolt cam 4 matched with lock core thumb wheel 31 respectively, the cam 2 12 of unblanking, so that when inserting key and rotational lock core 3 first lap, make lock core thumb wheel 31 and contact 42 connect and drive in advance large deadbolt cam 4 counter-clockwise rotations, make the traveller 44 on the 3rd contact 43 on the large deadbolt cam 4 drive large dead bolt 11 retractions in large dead bolt 11 chutes, 113 interior movements, thereby finish unblanking of large dead bolt 11, link up with connecting of 13 chutes 131 by the traveller 122 on the cam 2 12 of unblanking with universe rod simultaneously, make universe rod hook 13 synchronous retractions and finish unblanking of universe rod hook 13, when rotational lock core 3 second encloses again, lock core thumb wheel 31 is namely matched with the contact 123 of the cam 2 12 of unblanking and drive cam 2 12 inhours of unblanking and rotate, driving the cam 1 of unblanking by connecting of the contact 121 on the cam 2 12 of unblanking and the contact 73 on the cam 1 of unblanking clockwise rotates, by connecting of the block 93 on unblank cam one 7 upper contact head planes 71 and little dead bolt 9 locking bars 92 little dead bolt 9 and locking bar 92 retractions are moved, this moment is because the downward contact of the rotation touching lever 94 on the locking bar 92 is matched with the inclined-plane 72 on cam 7 contacts of unblanking, thereby rotation touching lever 94 is rotated around the hinge inhour, make contact upwards left-leaning, thereby can not touch the plush copper 51 on the rotating disk 5, in the retraction unlocking condition that keeps large dead bolt, make little dead bolt 9 retractions and finish and manually unblank, such as Fig. 1.
Lock body 1 is provided with the Inner door lock 2 of its end belt lock tongue 21, and cam 22 and the return spring 23 matched with Inner door lock 2 are when rotating the other cam 22 of Inner door lock 2, by cooperating of the groove on the contact 24 on the cam 22 and the Inner door lock, make Inner door lock 2 flexible, lock thereby finish manually, such as Fig. 1.

Claims (5)

1. self-locking fingerprint electronic lock, comprise lock body, be arranged on the lock body: on its locking bar with the little dead bolt of spring, on its locking bar with on spring, the tongue body with the large dead bolt of chute, universe rod with chute on it is linked up with, and the transmission component and the electronic and manual actuation part that connect them, the locking bar of little dead bolt is provided with the rotation touching lever, the rotation touching lever is matched with the rotating disk that is arranged on the lock body, rotating disk links to each other with automatic slider by connecting rod, automatic slider is matched with the chute on the large dead bolt tongue body, it is characterized in that:
Described transmission component comprise with coaxial its of handle axle on establish the handle cam of contact and the cam one of unblanking, be installed in the large deadbolt cam of establishing contact on the lock body its by axle, be hinged on the cam two of unblanking of establishing contact on the large dead bolt tongue body its by axle, with the lock core thumb wheel of establishing contact on its of lock pin coaxial, wherein:
Unblank the first contact outer end of cam one be provided with little dead bolt locking bar on rotation touching lever and the inclined-plane that matches of block, the second contact is matched with the contact of the cam two of unblanking;
The first contact on the handle cam is matched with large deadbolt cam, and the second contact is made as the flexible contact matched with motor-driven push rod;
First, second contact on the large deadbolt cam matches with handle cam contact and lock core thumb wheel contact respectively, and the 3rd contact places in the large dead bolt tongue body chute by the traveller on it;
The cam two of unblanking is fixed on the large dead bolt, and the first contact on it is matched with the second contact of the cam one of unblanking, and the second contact and lock core thumb wheel are matched, and the traveller on the cam two of unblanking simultaneously places the universe rod of its outer end buckle to link up with in the chute;
Contact on the lock core thumb wheel respectively with large deadbolt cam on the contact of contact, the cam two of unblanking matched.
2. self-locking fingerprint electronic lock according to claim 1, it is characterized in that rotation touching lever on the described little dead bolt locking bar is made as the bifurcation font bar with three contacts, wherein a contact is made as level contacts, this contact is hinged on the locking bar by hinge, contact end links to each other with extension spring on being fixed on locking bar, and two contacts in addition are made as respectively contact up and down.
3. self-locking fingerprint electronic lock according to claim 1, it is characterized in that described rotating disk is made as a circular discs, hinge by the center is hinged on the lock body, the edge of rotating disk is provided with a plush copper that matches to upper contact head with the rotation touching lever, be fixed with connecting rod and extension spring on the rotating disk, the extension spring other end is fixed on the lock body, and the connecting rod other end links to each other with automatic slider, and the automatic slider other end is provided with the arc surface electric contact that matches with chute on the large dead bolt tongue body.
4. self-locking fingerprint electronic lock according to claim 1, it is characterized in that described motorized motions part comprises the scroll bar that links to each other with motor, the driving spring that links to each other with push rod with scroll bar respectively, push rod matches with the second contact of handle cam, and this second contact is arranged in the contact apertures of handle cam by spring.
5. self-locking fingerprint electronic lock according to claim 1, it is characterized in that described manual actuation part comprise spoon axle and on the lock core thumb wheel, large deadbolt cam, the unblank cam two matched with the lock core thumb wheel respectively.
CN 201010156261 2010-04-27 2010-04-27 Self-locking fingerprint electronic lock Expired - Fee Related CN101881102B (en)

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Application Number Priority Date Filing Date Title
CN 201010156261 CN101881102B (en) 2010-04-27 2010-04-27 Self-locking fingerprint electronic lock

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201010156261 CN101881102B (en) 2010-04-27 2010-04-27 Self-locking fingerprint electronic lock

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CN101881102A CN101881102A (en) 2010-11-10
CN101881102B true CN101881102B (en) 2013-04-24

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Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102425339B (en) * 2011-11-16 2014-03-12 宁波瑞奥物联技术有限公司 Electronic lock capable of being automatically locked
CN103195308B (en) * 2013-04-08 2015-02-18 上海冠益实业有限公司 Mortise lock capable of achieving switching of automatic locking state and manual locking state
CN104763243B (en) * 2015-02-02 2017-10-27 中山市高利锁业股份有限公司 A kind of safe electronic theftproof lock and its method for unlocking
GB2552502B (en) * 2016-07-26 2018-12-26 Trellicor Pty Limited Deadlock slamlock combination

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2387218Y (en) * 1999-06-08 2000-07-12 徐至涵 Auto-extending locking mechanism for spring bolt
CN1601037A (en) * 2004-10-20 2005-03-30 程道炎 Fingerprint electronic lock
CN200940380Y (en) * 2006-08-15 2007-08-29 夏志云 Automatic locking lock
EP1862617A1 (en) * 2006-05-31 2007-12-05 KALE Kilit ve Kalip Sanayi A.S. Automatic security lock with hook-shape latch reinforcement pins
CN201649870U (en) * 2010-04-27 2010-11-24 马一杰 Self-locking fingerprint electronic lock

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002088500A1 (en) * 2001-04-25 2002-11-07 Henri Rochman High-security lock mechanical device with multiple bolts over the height of the door, with automatic locking
AU2002233580A1 (en) * 2002-02-07 2003-09-02 Henri Rochman Safety device with delayed automatic latching and locking until the door is completely closed

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2387218Y (en) * 1999-06-08 2000-07-12 徐至涵 Auto-extending locking mechanism for spring bolt
CN1601037A (en) * 2004-10-20 2005-03-30 程道炎 Fingerprint electronic lock
EP1862617A1 (en) * 2006-05-31 2007-12-05 KALE Kilit ve Kalip Sanayi A.S. Automatic security lock with hook-shape latch reinforcement pins
CN200940380Y (en) * 2006-08-15 2007-08-29 夏志云 Automatic locking lock
CN201649870U (en) * 2010-04-27 2010-11-24 马一杰 Self-locking fingerprint electronic lock

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