CN101929276A - Photoelectric digital spring lock core - Google Patents
Photoelectric digital spring lock core Download PDFInfo
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- CN101929276A CN101929276A CN2009101143406A CN200910114340A CN101929276A CN 101929276 A CN101929276 A CN 101929276A CN 2009101143406 A CN2009101143406 A CN 2009101143406A CN 200910114340 A CN200910114340 A CN 200910114340A CN 101929276 A CN101929276 A CN 101929276A
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Abstract
The invention discloses a photoelectric digital spring lock core which comprises a spring lock core and a photoelectric control circuit, wherein the spring lock core comprises a lock hole, an inner core capable of rotating with an inserted matched key, a marble hole internally provided with a spring and a marble, and an unlocking transmission part; the photoelectric control circuit comprises an unlocking coding signal detection circuit and an unlocking signal drive circuit; and the lock core comprises a photoelectric coding member and an unlocking switch and a power switch. In the photoelectric digital spring lock core, a photoelectric technology is applied to the traditional spring lock core, optical channel coding combinations are enough so as not to be easy to crack; the lock core and the lock body can be separately installed, therefore, the destructiveness preventing effect is good; the photoelectric digital spring lock core and the original mechanical spring lock form double insurance, which lowers the mutual opening rate, and has higher safety and stronger destructiveness preventing effect; and when the key is inserted, a circuit is switched on for electrifying, therefore, electricity and energy are saved. In addition, the invention has the advantages of simple structure, high reliability, low cost, easy reconstruction and production as well as manufacture, convenient popularization and installation as well as maintenance.
Description
Technical field
The present invention relates to a kind of lock cylinder, more particularly, relate to a kind of photoelectric digital spring lock core.
Background technology
Lockset generally can be divided into mechanical lock and electronic lock two big classes:
Conventional traditional fully mechanical cylinder lock, generally form by lock body, lock core and key, its principle is: key inserts lock core, suitable as the position of each key bit and the pellet shot from a slingshot hole in the lock core, and the height of each key bit pushes up the pellet shot from a slingshot in each pellet shot from a slingshot hole the same horizontal level of setting just, then can the rotational lock core inner core, thus drive the drive disk assembly of unblanking on it, the rotation of inner core is converted to moving of lock body upper lock tongue, lock is opened.This class lock is damaged unlatching easily owing to simple in structure, also opens with the skilled unlocking method easily, so theftproof performance is on the low side.
Low and middle-grade electronic locks, price are not low, but often have easy ruined shortcoming yet; Advanced electronic lock because circuit structure and install complicatedly costs an arm and a leg, general only in the restaurant, places such as office, major company install and use, Fingerprint Lock wherein, consumption still less.
Take all factors into consideration cost performance, the overwhelming majority's security door, safety cabinet, car door, motorcycle, electric bicycle etc. in the society still select to adopt cylinder lock.
In addition, no matter on the market, or on patent and the correlation technique document, the product or the technical scheme that also yet there are no the unification of mechanical type cylinder lock and Photoelectric lock occur.
Summary of the invention
Purpose of the present invention promptly is to provide a kind of photoelectric technology is applied to the photoelectric digital spring lock core of traditional lock cylinder, and is compared with prior art, safe, anti-destructive strong, economize on electricity, easy to install and with low cost.
Photoelectric digital spring lock core of the present invention is to set up the photoelectric coding member at existing traditional lock cylinder to form, and its concrete technical scheme is as follows:
Photoelectric digital spring lock core of the present invention includes lock cylinder and photoelectric control circuit.Described lock cylinder includes: lockhole, can be with the inner core of the matched key rotation of inserting, in be provided with the pellet shot from a slingshot hole of spring and pellet shot from a slingshot, and the drive disk assembly of unblanking (being used for the driving device lock body in traditional lock cylinder unblanks, the rotation of inner core can be converted to moving of dead bolt, specifically can be various ways such as connecting rod, driving lever, shift fork or lever); Described photoelectric control circuit includes unblank code signal testing circuit and unlocking signal drive circuit;
Also include the photoelectric coding member on the described lock core and the switch that undoes the lock:
Described photoelectric coding member includes a plurality of notches that run through lock core and inner core thereof, lockhole simultaneously; The two ends of described each notch are respectively arranged with photoemission cell and photoelectric receiving tube; Described each photoemission cell links to each other with control circuit with photoelectric receiving tube, the output of each photoelectric receiving tube be connected to the code signal testing circuit of unblanking with the door input;
Matched key is provided with the respective coding hole, and this notch includes through hole and non through hole.
Each notch on the described lock core can form the light coding pass of open-work or non-open-work when matched key inserts the back or rotates to certain angle.Just form effective coding pass when adopting key to rotate to certain angle, played the effect that prevents skilled unlocking equally.
Thus, the position of light coding pass and the various combination of quantity then can form abundant optical channel encoding scheme.Even optical channel also can be arranged to many rows' mode.Simultaneously, owing to the combination of actual situation hole, also stopped the possibility of skilled unlocking substantially.
Described photoelectric receiving tube, can adopt following circuit connecting mode accordingly:
(1) for the light coding pass of open-work type,
1) its each photoelectric receiving tube adopts infrared receiving diode, and composes in series and be subjected to light and door; This be subjected to that the output of light and door is connected to the code signal testing circuit of unblanking with the door input; Perhaps,
2) its each photoelectric receiving tube adopts and is subjected to the infrared reception triode of light cut-off type, and is connected in parallel, its common output be connected to the code signal testing circuit of unblanking with the door input; Perhaps,
3) its each photoelectric receiving tube combination adopts above-mentioned 1) and 2) two kinds of modes of connection, the output of the two be connected to the code signal testing circuit of unblanking with the door input;
(2) for the light coding pass of non-open-work type, its each photoelectric receiving tube adopts infrared receiving diode, and is connected in parallel, its common output be connected to the code signal testing circuit of unblanking with the door input.
More than adopt a plurality of infrared receiving tubes serial connections or and connect and form and the input that is connected to unblank code signal testing circuit and door (inclusive NAND door) behind the door, with significantly reduce lock core and and door (inclusive NAND door) between the connected mode of line, also be to consider the lock core finite volume, the result of too many line can not be arranged.
The described switch series that undoes the lock is connected in the current supply circuit of unlocking signal drive circuit, and its break-make drive disk assembly of being unblanked is stirred and triggered, and is used for closed unlocking signal drive circuit, and its specific design installation site adapts with the drive disk assembly of unblanking.The concrete form of the described switch that undoes the lock can be decided according to the structure of the drive disk assembly of unblanking, and for example adopts reed switch etc.Its operating principle: when the key that matches inserts lock core, the height of each key bit pushes up design attitude with the pellet shot from a slingshot in each pellet shot from a slingshot hole just, and then key can drive the inner core rotation, and then the drive disk assembly action of unblanking, trigger closure undo the lock switch and then closed unlocking signal drive circuit.If the detected photoelectric coding signal of unlocking signal testing circuit in the described photoelectric control circuit is also correct at this moment, then drive related circuit, control automatically controlled lock body and carry out the task of unblanking.
Other parts described in the present invention in the photoelectric control circuit belong to conventional existing mature technology, are not described in detail in this.
As improvement, also power switch can be set on lock core to above-mentioned photoelectric digital spring lock core.This power switch is serially connected with in the current supply circuit of photoelectric control circuit, specifically can adopt leaf spring switch: it is located at top in one of them pellet shot from a slingshot hole of described lock cylinder; Between the pellet shot from a slingshot in this reed switch and this pellet shot from a slingshot hole, be provided with push rod.Its operating principle: when matched key inserts lock core, with this pellet shot from a slingshot of key bit jack-up of appointment and on push rod, thereby closed this reed switch, closed circuit power supply then.The advantage of doing like this is: circuit needn't be in long-term "on" position, thereby reaches purpose of saving, and this is particularly useful for the situation that adopts dry cell as power supply.
As another improvement, also the warning drive circuit can be set in described photoelectric control circuit to above-mentioned photoelectric digital spring lock core; This warning drive circuit includes alarm relay, and its constant close contact and the described switch series that undoes the lock are connected in the circuit, and its constant open contact links to each other with warning circuit.The advantage of doing like this is: when the next unlocking signal of code signal testing circuit feedback of unblanking is not inconsistent, this warning drive circuit works, then the constant close contact of alarm relay disconnects, thus the unlocking signal drive circuit can not work, guaranteed that this moment, lockset kept closed condition.
When further optimizing, also can be, and connect another constant open contact of alarm relay at the two ends of described power switch, the circuit supply self-insurance when realizing reporting to the police.
Improvement again as to above-mentioned photoelectric digital spring lock core also can include the code signal holding circuit of being made up of the RC circuit of unblanking in described photoelectric control circuit; This RC circuit is connected on described unblanking between code signal testing circuit output and the ground.The output signal that the described code signal testing circuit of unblanking is set keeps 3 to 8 second time, goes to close when undoing the lock switch rotating internal cylinder guaranteeing, the code signal of unblanking is not lost.The output signal retention time is unsuitable long, can prevent skilled unlocking.
As optimization to above-mentioned photoelectric digital spring lock core, also can in described warning drive circuit, include the alarm signal delay circuit of forming by the RC circuit, to be used to prolong the turn-off time of alarm relay constant close contact under the abnormality, promptly prolong the time that the unlocking signal drive circuit is resumed work again, to prevent skilled unlocking.
As from the foregoing, photoelectric digital spring lock core of the present invention has following characteristics:
1, photoelectric technology can be applied to traditional lock cylinder, simple in structure, be easy to the repacking and the manufacturing, be convenient to safeguard, applied widely.
2, can form abundant optical channel encoding scheme by the position of optical channel and the various combination of quantity, make that electronic lock part coded combination is enough, be difficult for being cracked; Constitute double insurance with original mechanical cylinder lock, reduced the mutual opening rate of lockset, safety is higher, anti-destructive is stronger.
3, each photoemission cell and photoelectric receiving tube adopt succinct series connection mostly or directly are connected in parallel, and are particularly suitable for this just nervous space in the lock core.Simultaneously, because line is few, greatly improved the functional reliability of device.
4, be provided with circuit power switch.Have only when key inserts, circuit is just connected energising, thereby economize on electricity, energy-conservation.
5, easy to install and with low cost, be easy to promote: the cost of production of circuit part can be controlled and be lower than below 20 yuan; Control even use more senior single-chip microcomputer instead, cost also can be controlled in below 30 yuan.
6, because the mode that adopted the unlocking signal drive circuit to drive automatically controlled lock body has substituted traditional machinery mode of unblanking,, and then also stopped by destroying the possibility that lock core reaches the purpose of unblanking so lock core can realize separating installation with lock body.
Description of drawings
Fig. 1 is the machine construction principle figure (cut-away view) of an embodiment of photoelectric digital spring lock core of the present invention.
Fig. 2 is the left diagrammatic sketch of Fig. 1.
Fig. 3 is the diagrammatic sketch of bowing of Fig. 1.
Fig. 4 is the schematic diagram of the matched key of photoelectric digital spring lock core of the present invention.
Fig. 5 is the circuit theory diagrams of an embodiment of photoelectric digital spring lock core of the present invention.
Description of reference numerals:
1, the undo the lock inner core 4-lockhole of switch 2-photoemission cell 3-lock core of K1-
Notch on the 5-lock core 6-photoelectric receiving tube 7-push rod 8-lock core
9-pellet shot from a slingshot 10, K10-power switch 11-notch 12-pellet shot from a slingshot hole on the key
The J1-relay J 2-alarm relay T1 that undoes the lock, the T2-triode
Contact switch DG1, the DG2 of J2_1, J2_2-alarm relay, DG3-photoelectric receiving tube group
The specific embodiment
Below in conjunction with accompanying drawing photoelectric digital spring lock core of the present invention is further described.
Photoelectric digital spring lock core of the present invention includes lock cylinder and photoelectric control circuit.
Fig. 1 to Fig. 3 is respectively the machine construction principle figure (cut-away view) of an embodiment of photoelectric digital spring lock core of the present invention and left diagrammatic sketch thereof, the diagrammatic sketch of bowing.As shown in the figure, photoelectric digital spring lock core of the present invention includes the lockhole 4 of traditional lock cylinder, the inner core 3 that can rotate with the matched key that inserts, in be provided with the pellet shot from a slingshot hole 12 of spring and pellet shot from a slingshot 9 and the drive disk assembly of unblanking.
As shown in Figure 5, photoelectric control circuit of the present invention partly includes code signal testing circuit of unblanking (left part among the figure) and unlocking signal drive circuit (right side part among the figure);
Also include the photoelectric coding member on the described lock core and the switch 1 that undoes the lock:
Described photoelectric coding member includes a plurality of notches 8 that run through lock core 5 and inner core 3 thereof, lockhole 4 simultaneously; The two ends of described each notch 8 are respectively arranged with photoemission cell 2 and photoelectric receiving tube 6; Each photoemission cell 2 links to each other with control circuit with photoelectric receiving tube, and the output of each photoelectric receiving tube 6 is connected to the code signal testing circuit of unblanking and input door 1;
Matched key is provided with respective coding hole 11, this notch be through hole or non through hole all can,
Each notch 8 on the lock core can be when matched key inserts the back or rotate to certain angle, forms the light coding pass of open-works or non-open-work with respective coding hole 11 on the key.
As Fig. 5, the K switch that undoes the lock 1 is serially connected with in the unlocking signal drive circuitry loop, and its break-make drive disk assembly of being unblanked is stirred and triggered, and is used for closed unlocking signal drive circuit.Its specific design installation site, adapting with the concrete drive disk assembly of unblanking gets final product.The concrete form of the described switch 1 that undoes the lock can be decided according to the structure of the drive disk assembly of unblanking, and for example adopts reed switch etc.Its course of work: when the key that matches inserts lock core 5, the height of each key bit pushes up same horizontal level with the pellet shot from a slingshot 9 in each pellet shot from a slingshot hole 12 just, then key can drive inner core 3 rotations, and then the drive disk assembly action of unblanking, trigger the closure switch 1 (that is K1) that undoes the lock, touch this reed switch closure, and then closed unlocking signal drive circuit.If the detected photoelectric coding signal of unlocking signal testing circuit in the described photoelectric control circuit is also correct at this moment, then drive related circuit, control automatically controlled lock body, carry out the task of unblanking.
In Fig. 5, each photoelectric receiving tube has adopted 3 groups of different connected modes:
(1) each photoelectric receiving tube of the light coding pass correspondence of open-work type has been divided into following two kinds of connected modes:
1) each photoelectric receiving tube of figure left side place group DG1, employing be infrared receiving diode, be subjected to light and door for multitube composes in series; This series arm is by electric resistance partial pressure, and its output is connected to the code signal testing circuit of unblanking and input door 1;
2) each photoelectric receiving tube of side place group DG2 among the figure, employing be that a plurality of infrared reception triodes of light cut-off type that are subjected to are connected in parallel, its common output is connected to the code signal testing circuit of unblanking and input door 1;
(2) each photoelectric receiving tube of place, figure right side group DG3, corresponding is the light coding pass of each non-open-work type, employing be that a plurality of infrared receiving diodes are connected in parallel, its common output is connected to the code signal testing circuit of unblanking and input door 1.
In Fig. 5, each photoemission cell and its photoelectric receiving tube connection are connected into 3 series arms adaptably, and each series arm is connected to the two ends of power supply by divider resistance.But according to general electricity general knowledge, as long as each photoemission cell among the present invention can guarantee that it is luminous, its concrete connected mode is not adhered rigidly to.
As from the foregoing, make up by the connected mode that adopts above-mentioned different photoelectric receiving tubes, it is too complicated that circuit does not become, but increase the anti-ability of cracking of coding circuit.
Shown in Fig. 2,3, also be provided with power switch 10 (what adopt among the figure is leaf spring switch) on the lock core.In the pellet shot from a slingshot hole of certain setting, the spring on pellet shot from a slingshot 9 tops is taken away, replace the push rod 7 of suitable length, and reed-type power switch 10 is set on push rod 7 tops.As Fig. 5, this power switch K10 is serially connected with in the current supply circuit of photoelectric control circuit.When matched key inserts lock core, with this pellet shot from a slingshot 9 of key bit jack-up of appointment and on push rod 7, thereby closed this reed switch 10, closed circuit power supply then.
Among Fig. 5, also be provided with the warning drive circuit; This warning drive circuit includes alarm relay J2, its constant close contact and the described K switch 1 that undoes the lock are connected in series in the circuit, an one constant open contact J2_1 links to each other with warning circuit, and another constant open contact J2_2 is attempted by the two ends of power switch, the circuit supply self-insurance when being used to realize reporting to the police.When the unlocking signal that comes when the code signal testing circuit feedback of unblanking is not inconsistent, this warning drive circuit works, then the constant close contact of alarm relay J2 disconnects, thus the unlocking signal drive circuit can not work, guaranteed that this moment, lockset kept closed condition.
Among Fig. 5, unblank between code signal testing circuit output and the ground, also be provided with the code signal holding circuit of forming by the RC circuit of unblanking described.The output signal that the described code signal testing circuit of unblanking is set keeps 3 to 8 second time, does not lose rotating internal cylinder 3 go the to close code signal of unblanking when undoing the lock switch guaranteeing.
Among Fig. 5, unblank between code signal testing circuit output and the ground described, also be provided with by the alarm signal delay circuit of forming by the RC circuit, to be used to prolong the turn-off time of alarm relay constant close contact under the abnormality, promptly prolong the time that the unlocking signal drive circuit is resumed work again, need time-delay a few minutes just can unblank after promptly reporting to the police, be used to prevent skilled unlocking.
The operating principle of photoelectric digital spring lock core of the present invention: (is that example describes with Fig. 5)
1, the situation of normally unblanking:
1) when adaptive key inserted lock core, each key bit supported into each pellet shot from a slingshot hole, certain key bit of setting be this pellet shot from a slingshot 9 of jack-up and on push rod 7, thereby closed reed-type power switch 10, closed circuit power supply then, each infrared-emitting diode gets electroluminescence.
Simultaneously, the height of other key bit just separately the pellet shot from a slingshot in the pellet shot from a slingshot hole push up same horizontal level, thereby this moment, key can drive inner core 3 rotations, touched this reed-type K switch 1 closure that undoes the lock.
2) since each the corresponding open-work 8 and 11 on key and the lock core to be connected to form the coding of optical channel correct, so each the photoelectric receiving tube branch road in the unlocking signal testing circuit is exported high level.
3) through two NAND gates 1 and 2, the code signal output high level of unblanking.
4) because K switch 1 closure that undoes the lock, the code signal of unblanking is still exported high level again through two NAND gates 3 and 4, triode T1 conducting, the relay J that undoes the lock 1 electric closure, drive automatically controlled lock body and finish and unblank.At this moment, warning circuit is because of NAND gate 5 output low levels, and T2 ends and do not work.
Circuit working state analysis when 2, key code is incorrect:
(1) key is not right fully: then reed-type power switch 10 can't be closed, and circuit is not worked, so can't open the door.
(2) key bit of key is incorrect: then inner core 3 can't rotate, and undo the lock K switch 1 of reed-type keeps disconnecting, and then T1 ends, and the relay J that undoes the lock 1 can't get electric, so can't unblank.
(3) correct and the quantity or the malposition of light through hole of the key bit of key:
1) key can drive inner core 3 and rotates, and touches this reed-type K switch 1 closure that undoes the lock.
2) incorrect because of encoding, it is low level that the incoming level of NAND gate 1 must have one or more, so NAND gate 1 output high level, through phase inverter 2 back output low levels, again through two NAND gates 3 and 4, still output low level, then T1 ends, and the relay J that undoes the lock 1 can't get electric, so can't unblank.
3) simultaneously, the code detection signal is through phase inverter 5 back output high level, and 6 two inputs of NAND gate are high level, and NAND gate 6 output low levels are through phase inverter 7 output high level; D2 and RC2 form signal holding circuit (time is for being made as 5 to 10 minutes), through phase inverter 8 and 9 output high level, thus the T2 conducting, alarm relay J2 adhesive, alarm is given in power supply; Simultaneously, be attempted by the constant open contact J2_2 closure at the two ends of power switch, the circuit supply self-insurance in the time of can realizing reporting to the police, and its constant close contact disconnects the power supply of the K switch 1 place branch road that undoes the lock, NAND gate 3 can not receive the switching signal that undoes the lock, and can't unblank in 5 to 10 minutes, has improved security performance.
Illustrate: in traditional lock cylinder, the unblank concrete structure of drive disk assembly has various ways, for example be connecting rod, driving lever, shift fork or lever etc., its position is also varied, for example be positioned at lock core end or middle part etc. radially, but all be used for the rotation of inner core is converted to moving of dead bolt, the driving device lock body is unblanked; And in the present invention, then come the closure switch 1 (that is the K1 in the circuit diagram) that undoes the lock with it.
Claims (10)
1. photoelectric digital spring lock core includes lock cylinder and photoelectric control circuit; Described lock cylinder includes: lockhole, the inner core that can rotate with the matched key that inserts, in be provided with the pellet shot from a slingshot hole of spring and pellet shot from a slingshot and the drive disk assembly of unblanking; Described photoelectric control circuit includes unblank code signal testing circuit and unlocking signal drive circuit;
It is characterized in that: also include the photoelectric coding member on the described lock core and the switch that undoes the lock:
Described photoelectric coding member includes a plurality of notches that run through lock core and inner core thereof, lockhole simultaneously; The two ends of described each notch are respectively arranged with photoemission cell and photoelectric receiving tube; Described each photoemission cell links to each other with control circuit with photoelectric receiving tube, the output of each photoelectric receiving tube be connected to the code signal testing circuit of unblanking with the door input;
Matched key is provided with the respective coding hole, and this notch includes through hole and non through hole;
When each notch on the described lock core inserts the back or rotates to certain angle at matched key, form the light coding pass of open-work or non-open-work;
The described switch series that undoes the lock is connected in the current supply circuit of unlocking signal drive circuit, and its break-make drive disk assembly of being unblanked is stirred and triggered.
2. photoelectric digital spring lock core according to claim 1 is characterized in that, the circuit connecting mode of described each photoelectric receiving tube is:
(1) for the light coding pass of open-work type,
1) its each photoelectric receiving tube adopts infrared receiving diode, and composes in series and be subjected to light and door; This be subjected to that the output of light and door is connected to the code signal testing circuit of unblanking with the door input; Perhaps,
2) its each photoelectric receiving tube adopts and is subjected to the infrared reception triode of light cut-off type, and is connected in parallel, its common output be connected to the code signal testing circuit of unblanking with the door input; Perhaps,
3) its each photoelectric receiving tube combination adopts above-mentioned 1) and 2) two kinds of modes of connection, the output of the two be connected to the code signal testing circuit of unblanking with the door input;
(2) for the light coding pass of non-open-work type, its each photoelectric receiving tube adopts infrared receiving diode, and is connected in parallel, its common output be connected to the code signal testing circuit of unblanking with the door input.
3. photoelectric digital spring lock core according to claim 2 is characterized in that: include the warning drive circuit in the described photoelectric control circuit; This warning drive circuit includes alarm relay, and its constant close contact and the described switch series that undoes the lock are connected in the circuit, and its constant open contact links to each other with warning circuit.
4. according to the described photoelectric digital spring lock core of one of claim 1 to 3, it is characterized in that: also include power switch, be serially connected with in the current supply circuit of photoelectric control circuit; Described power switch is a reed-type, is located at the top in one of them pellet shot from a slingshot hole of described lock cylinder, between the pellet shot from a slingshot in this reed switch and this pellet shot from a slingshot hole, is provided with push rod.
5. photoelectric digital spring lock core according to claim 4 is characterized in that: the two ends of described power switch, and be connected to another constant open contact of alarm relay.
6. according to the described photoelectric digital spring lock core of one of claim 1 to 3, it is characterized in that: include the code signal holding circuit of forming by the RC circuit of unblanking in the described photoelectric control circuit; This RC circuit is unblanked between code signal testing circuit output and the ground described.
7. photoelectric digital spring lock core according to claim 4 is characterized in that: include the code signal holding circuit of being made up of the RC circuit of unblanking in the described photoelectric control circuit; This RC circuit is unblanked between code signal testing circuit output and the ground described.
8. photoelectric digital spring lock core according to claim 5 is characterized in that: include the code signal holding circuit of being made up of the RC circuit of unblanking in the described photoelectric control circuit; This RC circuit is unblanked between code signal testing circuit output and the ground described.
9. photoelectric digital spring lock core according to claim 4 is characterized in that: include the alarm signal delay circuit of being made up of the RC circuit in the described warning drive circuit.
10. photoelectric digital spring lock core according to claim 6 is characterized in that: include the alarm signal delay circuit of being made up of the RC circuit in the described warning drive circuit.
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| CN2009101143406A CN101929276A (en) | 2009-08-28 | 2009-08-28 | Photoelectric digital spring lock core |
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| CN2009101143406A CN101929276A (en) | 2009-08-28 | 2009-08-28 | Photoelectric digital spring lock core |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102979382A (en) * | 2012-12-24 | 2013-03-20 | 于连贵 | Light-operated password mechanical pin tumbler lock |
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2009
- 2009-08-28 CN CN2009101143406A patent/CN101929276A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102979382A (en) * | 2012-12-24 | 2013-03-20 | 于连贵 | Light-operated password mechanical pin tumbler lock |
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Application publication date: 20101229 |