CN104453479A - Antitheft lock for cable cross-connecting cabinets - Google Patents
Antitheft lock for cable cross-connecting cabinets Download PDFInfo
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- CN104453479A CN104453479A CN201410766945.4A CN201410766945A CN104453479A CN 104453479 A CN104453479 A CN 104453479A CN 201410766945 A CN201410766945 A CN 201410766945A CN 104453479 A CN104453479 A CN 104453479A
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Abstract
The invention discloses an antitheft lock for cable cross-connecting cabinets and belongs to the technical field of antitheft equipment. The antitheft lock comprises a mechanical lock body mounted on a cabinet door. The mechanical lock body is hinged to one end of an upper lock bar and one end of a lower lock bar; the other end of the upper lock bar and the other end of the lower lock bar are fitted to a lock hole in an upper door frame of a cabinet body and a lock hole in a lower door frame of the cabinet body. The antitheft lock further comprises at least one electronic lock and their control system; the electronic locks are used for adding locking points in case that the cabinet door is damaged by impact; each electronic lock comprises a lock shell mounted on the inner side of the cabinet door; an electromagnet is disposed within each lock shell; the control end of each lock shell is provided with a lead electrically connected with the control system; each lead extends into the corresponding lock shell and connected with the corresponding electronic lock; each lock shell is provided with a lock pin; a body of each lock pin is sleeved with a return spring. The antitheft lock comprising the mechanical lock and the electronic locks has the advantages that the electronic locks provide more lateral locking points, the cable cross-connecting cabinets are better theft preventive, and safety of the cable cross-connecting cabinets is guaranteed.
Description
Technical field
The invention belongs to burglary-resisting installation technical field, particularly a kind of theftproof lock for fiber cable cross connection box.
Background technology
Along with powerline network coverage is more and more wider, take optical fiber as the networking scale expanding day of trunk.In the process of networking, often can use fiber cable cross connection box, fiber cable cross connection box connects the optical cable by optical fiber fabrication, distribute and dispatches.Fiber cable cross connection box task in environmental monitoring work is day by day heavy, and especially monitoring system is important support and the instrument of maintenance management, has become the substantially supporting demand in fiber cable cross connection box construction.Therefore, the maintenance management of fiber cable cross connection box realizes unmanned, centralization, automation will become an inexorable trend.
Because the box volume of fiber cable cross connection box is limited, Anti-theft door structure conventional at home can not be adopted.Therefore, fiber cable cross connection box conventional at present generally adopts comparatively easy mechanical lock, and this mechanical lock only takes upper and lower two sealed points usually, and locking bar diameter is more tiny, limited rigidity, very easily by lawless person's violence damage, thus causes the valuables of fiber cable cross connection box inside stolen.Therefore, there is great potential safety hazard in existing fiber cable cross connection box.
Summary of the invention
The present invention is in order to overcome above-mentioned the deficiencies in the prior art, a kind of theftproof lock for fiber cable cross connection box is provided, this theftproof lock is jointly made up of mechanical lock and electronic lock, the sealed point of side has been set up on the basis of original upper and lower two sealed points, improve the difficulty that fiber cable cross connection box is opened, ensure that the safety of optical fiber cables cable distributing box.
For achieving the above object, present invention employs following technical scheme:
For the theftproof lock of fiber cable cross connection box, comprise the mechanical lock body be arranged on chamber door, described mechanical lock body respectively with upper lock rod, one end of lower locking bar is hinged, described upper lock rod, the other end of lower locking bar be arranged on casing upper door frame, lockhole on lower door frame matches, this theftproof lock also comprises at least one electronic lock and control system thereof increasing locking point when being subject to impact damage for chamber door, described electronic lock comprises the lock housing be arranged on inside chamber door, electromagnet is provided with in lock housing, the control end of described lock housing is provided with the wire be electrically connected with described control system, described wire stretches into lock housing inside and is connected with described electromagnet, described lock housing is also provided with reciprocating action under electromagnet effect and the lock pin that the chamber door of fiber cable cross connection box is opened and closed, is arranged with back-moving spring outside the shaft of this lock pin, the outside doorframe of described casing has the pin-and-hole coordinated with lock pin,
Described control system comprises:
Whether first detection module, produce skew for detecting chamber door;
Second detection module, for detecting mechanical lock open/close states;
Processing module, for receiving and processing the detection signal that first detection module and the second detection module export; Described first detection module send chamber door produce skew the signal of telecommunication and described second detection module output signal for mechanical lock be in opening time, this processing module to ON-OFF control circuit export unblock the signal of telecommunication;
ON-OFF control circuit, for receiving the signal of telecommunication that described processing module exports, and whether the power supply controlling to power to electromagnet is in conducting state; When described processing module exports and unlocks the signal of telecommunication, this ON-OFF control circuit connects the power supply of electromagnet;
Power module, provides power supply for giving above-mentioned each module.
The present invention can also be realized further by following steps.
Preferably, described first detection module comprises obliquity sensor and the operational amplification circuit whether detection chamber door produces skew, described obliquity sensor is fixed on chamber door inwall, the signal output part of this obliquity sensor is connected with the signal input part of operational amplification circuit, and this operational amplification circuit is used for the shifted signal received to amplify.
Preferably, described second detection module comprises and is arranged on upper lock rod or the Hall switch of lower locking bar near one end of lockhole, and is arranged on the magnet on casing; Described Hall switch and described magnet form matching relationship.
Preferably, described processing module comprises for by the phase inverter of detection signal negate, the AND circuit being used for the signal after anti-phase to carry out logical operation; The signal input part of described phase inverter is connected with the signal output part of operational amplification circuit, and the signal input part of this phase inverter is also connected with the signal output part of Hall switch; Two signal output parts of described phase inverter are connected with two signal input parts of AND circuit respectively.
Preferably, described ON-OFF control circuit comprises amplifying circuit and on-off circuit, and the signal output part of the signal input part AND circuit of described amplifying circuit is connected, and the signal input part of described amplifying circuit is also connected with the signal output part of on-off circuit.
Further, described obliquity sensor is installed in lock housing inside.
Beneficial effect of the present invention is: this theftproof lock is made up of jointly mechanical lock and electronic lock, and described mechanical lock is by upper lock rod, lower locking bar, and the lockhole mated with upper and lower locking bar and lockset form first theftproof lock; Described electronic lock and the control system be connected with electronic lock form second theftproof lock.Normally open at mechanical lock, and when skew occurs chamber door, the second theftproof lock just can be opened.When unauthorised broken means such as chamber door are clashed into, rocking action occurring makes chamber door offset, and mechanical lock is not opened, and the second theftproof lock is in blocking, thus increases the sealed point of side.Thus not only can improve the theftproof performance of fiber cable cross connection box, and not affect normal breakdown action.The particularly small volume of electronic lock, be convenient to install inside chamber door, shared space is little, can not have influence on the effective storage space in fiber cable cross connection box, and can not significantly increase a body weight, makes breakdown action keep original advantage light flexibly.In addition because electronic lock volume is little, the present invention also can arrange two to three electronic locks as required in chamber door, to increase the sealed point of chamber door side, to increase its theftproof performance better.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 a is the structural representation that in Fig. 1, electronic lock is in blocking;
Fig. 2 b is the structural representation that in Fig. 1, electronic lock is in opening;
Fig. 3 is control system circuit diagram in the present invention.
In figure, the implication of label symbol is as follows:
10-casing, 11-magnet, 12-outside doorframe 121-pin-and-hole
13-upper door frame, 14-lower door frame, 20-lockset, 30-upper lock rod
31-lower locking bar 32-Hall switch, 41-lock housing, 42-wire
43-electromagnet, 44-lock pin, 45-back-moving spring
46-front guiding trestle 47-rear guiding trestle 48-base
49-spring base, 51-obliquity sensor, 52-operational amplification circuit
53-phase inverter, 54-AND circuit, 55-amplifying circuit
56-on-off circuit, 60-chamber door
61-chamber door outer side edges, 62-hinge
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, the present invention includes casing 10 and chamber door 60, described chamber door 60 is hinged by hinge 62 and casing 10, chamber door outer side edges 61 is provided with mechanical lock body 20, described mechanical lock body 20 is hinged with one end of upper lock rod 30, lower locking bar 31 respectively, and the other end of described upper lock rod 30, lower locking bar 31 matches with the lockhole be arranged on casing 10 upper door frame 13, lower door frame 14;
As shown in Fig. 2 a, Fig. 2 b, this theftproof lock also comprises at least one electronic lock and control system thereof increasing locking point when being subject to impact damage for chamber door 60, described electronic lock comprises the lock housing 41 be arranged in chamber door outer side edges 61, electromagnet 43 is provided with in lock housing 41, the control end of described lock housing 41 is provided with the wire 42 be electrically connected with described control system, and described wire 42 stretches into lock housing 41 inside and is connected with described electromagnet 43, described lock housing 41 be also provided with reciprocating action under electromagnet 43 acts on and make the lock pin 44 that the chamber door 60 of fiber cable cross connection box opens and closes, this lock pin 44 has the link and free end that are connected with lock housing 41, the free end of described lock pin 44 is successively through rear guiding trestle 47, front guiding trestle 46, and stretch in the pin-and-hole 121 that is arranged on the outside doorframe 12 of casing 10, described rear guiding trestle 47, front guiding trestle 46 and lock housing 41 are all affixed with the base 48 be arranged in chamber door outer side edges 61, back-moving spring 45 is arranged with outside the shaft of described lock pin 44, the shaft of lock pin 44 is fixed with spring base 49, back-moving spring 45 is arranged between spring base 49 and rear guiding trestle 47,
Described control system comprises:
Whether first detection module, produce skew for detecting chamber door 60;
Second detection module, for detecting mechanical lock open/close states;
Processing module, for receiving and processing the detection signal that first detection module and the second detection module export, the signal input part of described processing module is connected with the signal output part of described first detection module, the second detection module respectively; Described first detection module send chamber door produce skew the signal of telecommunication and described second detection module output signal for mechanical lock be in opening time, this processing module to ON-OFF control circuit export unblock the signal of telecommunication;
ON-OFF control circuit, for receiving the signal of telecommunication that described processing module exports, and whether the power supply controlling to power to electromagnet 43 is in conducting state, and the signal input part of described ON-OFF control circuit is connected with the signal output part of described processing module; When described processing module exports and unlocks the signal of telecommunication, this ON-OFF control circuit connects the power supply of electromagnet 43;
Power module, for providing power supply to above-mentioned each module, described power module electrically connects with described first detection module, the second detection module, processing module and ON-OFF control circuit respectively.
Described first detection module comprises obliquity sensor 51 and the operational amplification circuit 52 whether detection chamber door 60 produces skew, described obliquity sensor 51 is fixed on chamber door 60 inwall, the signal output part of this obliquity sensor 51 is connected with the signal input part of operational amplification circuit 52, and this operational amplification circuit 52 amplifies for the shifted signal that will receive.
Described second detection module comprises and is arranged on upper lock rod 30 or the Hall switch 32 of lower locking bar 31 near one end of lockhole, and is arranged on the magnet 11 on casing 10; Described Hall switch 32 forms matching relationship with described magnet 11.
Described processing module comprises for by the phase inverter 53 of detection signal negate, the AND circuit 54 being used for the signal after anti-phase to carry out logical operation; The signal input part of described phase inverter 53 is connected with the signal output part of operational amplification circuit 52, and the signal input part of this phase inverter 53 is also connected with the signal output part of Hall switch 32; Two signal output parts of described phase inverter 53 are connected with two signal input parts of AND circuit 54 respectively.
Described ON-OFF control circuit comprises amplifying circuit 55 and on-off circuit 56, and the signal output part of the signal input part AND circuit 54 of described amplifying circuit 55 is connected, and the signal input part of described amplifying circuit 55 is also connected with the signal output part of on-off circuit 56.
As shown in Figure 3, described obliquity sensor 51 is installed in lock housing 41 inside.Described obliquity sensor 51 adopts SCA60C type obliquity sensor, the GND port ground connection of described sensor SCA60C, also be connected with positive source by filter capacitor C12, the vdd terminal mouth of described sensor SCA60C is connected with positive source, and the CLK port of described sensor SCA60C, C1 port, MOD port are all connected with the PGM port of sensor SCA60C by wire.
Described operational amplification circuit 52 comprises operational amplifier CA3140, and the NON-INV input port of described operational amplifier CA3140 is connected with the OUT output port of sensor SCA60C; The OUTPUT output port of described operational amplifier CA3140 is connected with one end of the first feedback resistance R13, the described other end of the first feedback resistance R13 is connected with the INV input port of operational amplifier CA3140, the other end of described first feedback resistance R13 is also connected with one end of the second feedback resistance R8, the other end ground connection of described second feedback resistance R8, described first feedback resistance R13 and the second feedback resistance R8 forms the feedback circuit of operational amplification circuit jointly;
An OFFSET2 port i.e. zeroing end of described operational amplifier CA3140 is connected with one end of adjustable resistance R6, namely another returns to zero to hold and is connected for the other end of described adjustable resistance R6 and OFFSET1 port, one of them of the sliding contact of described adjustable resistance R6 and operational amplifier CA3140 returns to zero to hold and is connected, described adjustable resistance R6 also ground connection, described adjustable resistance R6 is for arranging the bias voltage of operational amplifier CA3140, guarantee that amplifier is undistorted, be in work amplification region.
Described phase inverter 53 is 74LS04, described 74LS04 the 1st input port is connected with the OUTPUT output port of operational amplifier CA3140, described 74LS04 the 2nd input port is connected with the output port of Hall switch Y3144, and the output port of described Hall switch Y3144 is also connected with the 1st port of this Hall switch Y3144 by resistance R10.
Described AND circuit 54 is 74LS08, and the IN1 input port of described 74LS08 is connected with the OUT1 output port of 74LS04, and the IN2 input port of described 74LS08 is connected with the OUT2 output port of 74LS04.
Described amplifying circuit 55 comprises triode Q2, the base stage of described triode Q2 is connected by the OUT3 output port of current-limiting resistance R12 and 74LS08, current-limiting resistance R12 guarantees that the electric current of the base stage flowing into triode Q2 can not burn out triode Q2, the base stage of described triode Q2 is also connected with on-off circuit by pressure limiting resistance R7, current collection very high-order electricity when described pressure limiting resistance R7 ensures that triode Q2 is in amplification region, the grounded emitter of described triode Q2, the colelctor electrode of described triode Q2 is connected with on-off circuit.
Described on-off circuit 56 comprises normally opened relay K2, the coil input end mouth of described normally opened relay K2 is connected with power module, the coil output mouth of described normally opened relay K2 is connected with the colelctor electrode of triode Q2, the coil two ends reverse parallel connection of a described normally opened relay K2 sustained diode 2, described sustained diode 2 is for preventing relay electric current reverse breakdown triode when break-make pattern switches, the negative electrode of described sustained diode 2 is connected with one end of pressure limiting resistance R7, one end of described pressure limiting resistance R7 is connected and is also connected with the coil output of normally opened relay, the other end of described pressure limiting resistance R7 is connected with the base stage of triode Q2,
The input of the constant open contact of described normally opened relay K2 is connected with 24V power supply, and the output of this constant open contact is electrically connected with the coil in described electromagnet 43 by wire 42.
Further, the power module be connected with Hall switch 32, phase inverter 53, AND circuit 54 is 5V power supply, and the power module be connected with obliquity sensor 51, operational amplification circuit 52, normally opened relay coil is 12V power supply.
Operating principle of the present invention is as follows:
Adopt SCA60C type obliquity sensor as the sensor detecting chamber door deviation angle, this obliquity sensor is that a kind of quartz flexible servo accelerometer that adopts is as sensing element, it is the servo-drive system of a force balance type, when sensor produces inclination angle theta relative to center of gravity of earth direction, due to Action of Gravity Field, in sensor, sensing element swings an angle relative to plummet direction, by high-sensitive quartz transducer, this angular transition is become voltage signal.
Therefore, when chamber door 60 skew reaches the detection inclination angle theta of obliquity sensor, when obliquity sensor SCA60C detects that angle changes, corresponding magnitude of voltage can be exported at OUT output port, and by the OUT output port of obliquity sensor SCA60C, corresponding magnitude of voltage is loaded into the input port of operational amplification circuit 52, then carry out amplifier.
The magnitude of voltage that the OUT output port that the NON-INV input port of the operational amplifier CA3140 in described operational amplification circuit 52 receives described obliquity sensor SCA60C sends, and after the signal received is amplified, by carrying out negate in OUTPUT output port input inverter 53.
Described honeywell switch sensor Y3144, exports the OUT output port of the status information of the locking bar detected by this sensor Y3144, and is loaded in phase inverter and carries out negate.
Described phase inverter 74LS04, the 1st input port of this phase inverter receives the amplifying signal of the OUTPUT output port output of described operational amplifier CA3140, and signal, after negate, is loaded in AND circuit by the OUT1 output port of phase inverter;
2nd input port of phase inverter 74LS04 receives the signal of the OUT output port output of honeywell switch sensor Y3144, and signal, after negate, is loaded in AND circuit by the OUT2 output port of phase inverter.
Described AND circuit 74LS08, the IN1 input port of this AND circuit 74LS08 receives the signal of the OUT1 output port output of phase inverter, the signal of the OUT2 output port output of the IN2 input port phase inverter of AND circuit 74LS08, and the two kinds of signals received are carried out logic and operation, be then loaded in amplifying circuit by the OUT3 output port of AND circuit 74LS08.
The signal that the OUT3 output port that in described amplifying circuit, the base input end of triode Q2 receives AND circuit 74LS08 exports, signal after amplifying, the break-make of normally opened relay K2 in driving switch circuit 56.
Whether described on-off circuit 56 closes according to the coil of the normally opened relay K2 constant open contact deciding normally opened relay K2 that whether is energized, thus determines whether can power to electronic lock.
In addition, the present invention can set up the electronic lock of two to three said structures as required inside chamber door.
Claims (6)
1. for the theftproof lock of fiber cable cross connection box, comprise the mechanical lock body (20) be arranged on chamber door, described mechanical lock body (20) respectively with upper lock rod (30), one end of lower locking bar (31) is hinged, described upper lock rod (30), the other end of lower locking bar (31) be arranged on casing (10) upper door frame (13), lockhole (46) on lower door frame (14) matches, it is characterized in that: this theftproof lock also comprises the electronic lock and the control system thereof that increase locking point when at least one handle is subject to impact damage for chamber door (60), described electronic lock comprises the lock housing (41) being arranged on chamber door (60) inner side, electromagnet (43) is provided with in lock housing (41), the control end of described lock housing (41) is provided with the wire (42) be electrically connected with described control system, described wire (42) stretches into lock housing (41) inside and is connected with described electromagnet (43), described lock housing (41) is also provided with reciprocating action under electromagnet (43) effect and the lock pin (44) that the chamber door of fiber cable cross connection box (60) is opened and closed, be arranged with back-moving spring (45) outside the shaft of this lock pin (44), the outside doorframe (12) of described casing (10) have the pin-and-hole (121) coordinated with lock pin (44),
Described control system comprises:
Whether first detection module, produce skew for detecting chamber door (60);
Second detection module, for detecting mechanical lock open/close states;
Processing module, for receiving and processing the detection signal that first detection module and the second detection module export; Described first detection module send chamber door produce skew the signal of telecommunication and described second detection module output signal for mechanical lock be in opening time, this processing module to ON-OFF control circuit export unblock the signal of telecommunication;
ON-OFF control circuit, for receiving the signal of telecommunication that described processing module exports, and whether the power supply controlling to power to electromagnet (43) is in conducting state; When described processing module exports and unlocks the signal of telecommunication, this ON-OFF control circuit connects the power supply of electromagnet (43);
Power module, provides power supply for giving above-mentioned each module.
2. as claimed in claim 1 for the theftproof lock of fiber cable cross connection box, it is characterized in that: described first detection module comprises obliquity sensor (51) and the operational amplification circuit (52) whether detection chamber door (60) produces skew, described obliquity sensor (51) is fixed on chamber door (60) inwall, the signal output part of this obliquity sensor (51) is connected with the signal input part of operational amplification circuit (52), and this operational amplification circuit (52) amplifies for the shifted signal that will receive.
3. as claimed in claim 2 for the theftproof lock of fiber cable cross connection box, it is characterized in that: described second detection module comprises the Hall switch (32) of the one end being arranged on upper lock rod (30) or the close lockhole of lower locking bar (31), and is arranged on the magnet (11) on casing (10); Described Hall switch (32) and described magnet (11) form matching relationship.
4. as claimed in claim 3 for the theftproof lock of fiber cable cross connection box, it is characterized in that: described processing module comprises for by the phase inverter (53) of detection signal negate, for the signal after anti-phase being carried out the AND circuit (54) of logical operation; The signal input part of described phase inverter (53) is connected with the signal output part of operational amplification circuit (52), and the signal input part of this phase inverter (53) is also connected with the signal output part of Hall switch (32); Two signal output parts of described phase inverter (53) are connected with two signal input parts of AND circuit (54) respectively.
5. as claimed in claim 4 for the theftproof lock of fiber cable cross connection box, it is characterized in that: described ON-OFF control circuit comprises amplifying circuit (55) and on-off circuit (56), the signal output part of the signal input part AND circuit (54) of described amplifying circuit (55) is connected, and the signal input part of described amplifying circuit (55) is also connected with the signal output part of on-off circuit (56).
6. the theftproof lock for fiber cable cross connection box as described in any one of claim 2 ~ 5, is characterized in that: it is inner that described obliquity sensor (51) is installed in lock housing (41).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410766945.4A CN104453479B (en) | 2014-12-12 | 2014-12-12 | For the theftproof lock of fiber cable cross connection box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410766945.4A CN104453479B (en) | 2014-12-12 | 2014-12-12 | For the theftproof lock of fiber cable cross connection box |
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| CN104453479A true CN104453479A (en) | 2015-03-25 |
| CN104453479B CN104453479B (en) | 2016-05-25 |
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| CN201410766945.4A Active CN104453479B (en) | 2014-12-12 | 2014-12-12 | For the theftproof lock of fiber cable cross connection box |
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| CN106237361A (en) * | 2016-08-31 | 2016-12-21 | 宁波明太医疗器械有限公司 | A kind of structure improved steriliser locking device for door-lock |
| CN106710050A (en) * | 2017-01-10 | 2017-05-24 | 江南大学 | Lock pin moving measurement type RFID record lock for logistics container |
| CN107742386A (en) * | 2017-09-21 | 2018-02-27 | 烽火通信科技股份有限公司 | The burglary-resisting installation and method of a kind of fiber cable cross connection box |
| CN109217127A (en) * | 2018-10-18 | 2019-01-15 | 宁波菲沃特电气设备工程有限公司 | A kind of safety-type power cabinet with voltage measurement circuit |
| CN109339598A (en) * | 2018-11-28 | 2019-02-15 | 深圳市诚瑞丰科技股份有限公司 | A kind of secondary opening structure of Intelligent storage cabinet lattice door lock |
| CN111446634A (en) * | 2020-04-15 | 2020-07-24 | 东莞祥科智控装备有限公司 | Thing networked control cabinet |
| CN113668956A (en) * | 2021-07-27 | 2021-11-19 | 郭鹏昭 | Anti-theft lock based on resistance change |
| CN113668955A (en) * | 2021-07-27 | 2021-11-19 | 郭鹏昭 | Anti-theft lock based on resistance change |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106237361A (en) * | 2016-08-31 | 2016-12-21 | 宁波明太医疗器械有限公司 | A kind of structure improved steriliser locking device for door-lock |
| CN106710050A (en) * | 2017-01-10 | 2017-05-24 | 江南大学 | Lock pin moving measurement type RFID record lock for logistics container |
| CN106710050B (en) * | 2017-01-10 | 2022-08-02 | 江南大学 | Lockpin mobile measurement type RFID recording lock for logistics turnover box |
| CN107742386A (en) * | 2017-09-21 | 2018-02-27 | 烽火通信科技股份有限公司 | The burglary-resisting installation and method of a kind of fiber cable cross connection box |
| CN109217127A (en) * | 2018-10-18 | 2019-01-15 | 宁波菲沃特电气设备工程有限公司 | A kind of safety-type power cabinet with voltage measurement circuit |
| CN109217127B (en) * | 2018-10-18 | 2020-05-15 | 宁波菲沃特电气设备工程有限公司 | Safe type power cabinet with voltage measurement return circuit |
| CN109339598A (en) * | 2018-11-28 | 2019-02-15 | 深圳市诚瑞丰科技股份有限公司 | A kind of secondary opening structure of Intelligent storage cabinet lattice door lock |
| CN111446634A (en) * | 2020-04-15 | 2020-07-24 | 东莞祥科智控装备有限公司 | Thing networked control cabinet |
| CN111446634B (en) * | 2020-04-15 | 2021-10-26 | 东莞祥科智控装备有限公司 | Thing networked control cabinet |
| CN113668956A (en) * | 2021-07-27 | 2021-11-19 | 郭鹏昭 | Anti-theft lock based on resistance change |
| CN113668955A (en) * | 2021-07-27 | 2021-11-19 | 郭鹏昭 | Anti-theft lock based on resistance change |
| CN113668955B (en) * | 2021-07-27 | 2022-07-05 | 杭州亿居科技有限公司 | Anti-theft lock based on resistance change |
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