CN104453479B - For the theftproof lock of fiber cable cross connection box - Google Patents
For the theftproof lock of fiber cable cross connection box Download PDFInfo
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- CN104453479B CN104453479B CN201410766945.4A CN201410766945A CN104453479B CN 104453479 B CN104453479 B CN 104453479B CN 201410766945 A CN201410766945 A CN 201410766945A CN 104453479 B CN104453479 B CN 104453479B
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- 238000012423 maintenance Methods 0.000 description 2
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Abstract
The present invention discloses a kind of theftproof lock for fiber cable cross connection box, belongs to burglary-resisting installation technical field. this theftproof lock comprises the mechanical lock body being arranged on chamber door, described mechanical lock body respectively with upper locking bar, one end of lower locking bar is hinged, described upper locking bar, 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 that at least one handle increases electronic lock and the control system thereof of locking point while being subject to impact damage for chamber door, described electronic lock comprises the lock housing that is arranged on chamber door inner side, in lock housing, be provided with electromagnet, the control end of described lock housing is provided with the wire being electrically connected with control system, described wire stretches into lock housing inside and is connected with described electromagnet, in described lock housing, be also provided with lock pin, the shaft outside of lock pin is arranged with back-moving spring. the present invention is made up of jointly mechanical lock and electronic lock, and electronic lock increases the sealed point of side, improves the theftproof performance of fiber cable cross connection box, has guaranteed the security of fiber cable cross connection box.
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, the networking scale expanding day taking optical fiber as trunk.In the process of networking, often can use fiber cable cross connection box, fiber cable cross connection box connects the optical cable being formed by optical fiber fabricationConnect, distribute and dispatch. Fiber cable cross connection box task in environmental monitoring work is day by day heavy, and especially monitoring system is maintenance managementImportant support and instrument, become fiber cable cross connection box build in substantially supporting demand. Therefore, the maintenance pipe of fiber cable cross connection boxThat reason realizes is unmanned, centralization, automation will become an inexorable trend.
Because the box volume of fiber cable cross connection box is limited, can not adopt conventional at home Anti-theft door structure. Therefore, currentThe general mechanical lock comparatively easily that adopts of conventional fiber cable cross connection box, this mechanical lock is only taked upper and lower two sealed points conventionally,And locking bar diameter is more tiny, and rigidity is limited, very easily by lawless person's violence damage, thereby cause the valuable of fiber cable cross connection box insideArticle are stolen. Therefore there is great potential safety hazard in existing fiber cable cross connection box.
Summary of the invention
The present invention, in order to overcome above-mentioned the deficiencies in the prior art, provides a kind of theftproof lock for fiber cable cross connection box, and this is anti-Stealing lock is to be jointly made up of mechanical lock and electronic lock, has set up side sealed on the basis of original upper and lower two sealed pointsPoint, has improved the difficulty that fiber cable cross connection box is opened, and has guaranteed the security of optical fiber cables cable distributing box.
For achieving the above object, the present invention has adopted following technical scheme:
For the theftproof lock of fiber cable cross connection box, comprise the mechanical lock body being arranged on chamber door, described mechanical lock body dividesNot be not hinged with one end of upper locking bar, lower locking bar, the other end of described upper locking bar, lower locking bar be arranged on casing upper door frame, XiamenLockhole on frame matches, and this theftproof lock also comprises that at least one handle increases the electronics of locking point while being subject to impact damage for chamber doorLock and control system thereof, described electronic lock comprises the lock housing that is arranged on chamber door inner side, is provided with electromagnet in lock housing, described lock housingControl end is provided with the wire being electrically connected with described control system, and described wire stretches into lock housing inside and is connected with described electromagnet;The lock pin that is also provided with under electromagnet effect reciprocating action in described lock housing and the chamber door of fiber cable cross connection box is opened and closed, this lock pinShaft outside be arranged with back-moving spring, on the outside doorframe of described casing, have the pin-and-hole coordinating with lock pin;
Described control system comprises:
Whether first detection module, produce skew for detection of chamber door;
The second detection module, for detection of mechanical lock open/close states;
Processing module, for receiving and process the detection signal of first detection module and the output of the second detection module; DescribedThe signal of telecommunication and described the second detection module output signal that first detection module sends chamber door generation skew are that mechanical lock is in openingWhile opening state, this processing module is to the ON-OFF control circuit output release signal of telecommunication;
ON-OFF control circuit, for receiving the signal of telecommunication of described processing module output, and controls the electricity to electromagnet power supplyWhether source is in conducting state; When the described processing module output release signal of telecommunication, this ON-OFF control circuit is connected the electricity of electromagnetSource;
Power module, for providing power supply to above-mentioned each module.
The present invention can also further realize by following steps.
Preferably, described first detection module comprises whether detect chamber door produces obliquity sensor and the operation amplifier of skewCircuit, described obliquity sensor is fixed on chamber door inwall, the signal output part of this obliquity sensor and operational amplification circuitSignal input part is connected, and this operational amplification circuit is for amplifying the shifted signal receiving.
Preferably, described the second detection module comprises and is arranged on locking bar or lower locking bar is opened near the Hall of one end of lockholeClose, and be 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, for by the signal after anti-phaseCarry out the AND circuit of logical operation; The signal input part of described phase inverter is connected with the signal output part of operational amplification circuit,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 divideBe not connected with two signal input parts of AND circuit.
Preferably, described ON-OFF control circuit comprises amplifying circuit and on-off circuit, the signal input of described amplifying circuitThe signal output part of end AND circuit is connected, the signal input part of described amplifying circuit also with the signal output part phase of on-off circuitConnect.
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, described mechanical lock be byUpper locking bar, lower locking bar, the lockhole mating with upper and lower locking bar and lockset form first theftproof lock; Described electronic lock and and electronic lockConnected control system forms second theftproof lock. Normally open at mechanical lock, and when skew occurs chamber door, the second theftproof lockCan open. Rock action when unauthorised broken means such as chamber door are clashed into and make chamber door skew, mechanical lock is not opened, theTwo theftproof locks are in blocking, thus the sealed point of increase side. Thereby not only can improve the theftproof performance of fiber cable cross connection box,And do not affect normal breakdown action. The particularly small volume of electronic lock, is convenient to chamber door inner side and installs, and shared space is little,Can not have influence on the effective storage space in fiber cable cross connection box, and can significantly not increase a body weight, breakdown action is keptOriginal light advantage flexibly. In addition because electronic lock volume is little, the present invention also can in chamber door, arrange as required two toThree electronic locks, to increase the sealed point of chamber door side, to increase better its theftproof performance.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 a is the structural representation of electronic lock in blocking in Fig. 1;
Fig. 2 b is the structural representation of electronic lock in opening in Fig. 1;
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 locking bar
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, the technical scheme in the embodiment of the present invention is carried out clear, completeDescribe, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiment wholely. Based onEmbodiment in the present invention, those of ordinary skill in the art are not making obtain under creative work prerequisite every otherEmbodiment, belongs 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 cuts with scissors by hinge 62 and casing 10Connect, mechanical lock body 20 is installed in chamber door outer side edges 61, described mechanical lock body 20 is respectively with upper locking bar 30, lower locking bar 31One end is hinged, the other end of described upper locking bar 30, lower locking bar 31 be arranged on the lockhole on casing 10 upper door frames 13, lower door frame 14Match;
As shown in Fig. 2 a, Fig. 2 b, this theftproof lock also comprises when at least one handle is subject to impact damage for chamber door 60 to be increased and locksElectronic lock and the control system thereof of tight point, described electronic lock comprises the lock housing 41 being arranged in chamber door outer side edges 61, in lock housing 41Be provided with electromagnet 43, the control end of described lock housing 41 is provided with the wire 42 being electrically connected with described control system, and described wire 42 is stretchedEnter lock housing 41 inside and be connected with described electromagnet 43; In described lock housing 41, be also provided with reciprocating action under electromagnet 43 effectsAnd the lock pin 44 that the chamber door 60 of fiber cable cross connection box is opened and closed, this lock pin 44 has the link and the freedom that are connected with lock housing 41End, the free end of described lock pin 44 is successively through rear guiding trestle 47, front guiding trestle 46, and stretch to be arranged on casing 10 outsideIn pin-and-hole 121 on side door frame 12, described rear guiding trestle 47, front guiding trestle 46 and lock housing 41 all be arranged on chamber door outsideBase 48 on limit 61 is affixed, and the shaft outside of described lock pin 44 is arranged with back-moving spring 45, on the shaft of lock pin 44, is fixed withSpring 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 detection of chamber door 60;
The second detection module, for detection of mechanical lock open/close states;
Processing module, for receiving and process the detection signal of first detection module and the output of the second detection module, described inThe signal input part of processing module is connected with the signal output part of described first detection module, the second detection module respectively; DescribedThe signal of telecommunication and described the second detection module output signal that first detection module sends chamber door generation skew are that mechanical lock is in openingWhile opening state, this processing module is to the ON-OFF control circuit output release signal of telecommunication;
ON-OFF control circuit, for receiving the signal of telecommunication of described processing module output, and controls and powers to electromagnet 43Whether power supply in conducting state, the signal output part phase of the signal input part of described ON-OFF control circuit and described processing moduleConnect; When the described processing module output release signal of telecommunication, this ON-OFF control circuit is connected the power supply of electromagnet 43;
Power module, for give above-mentioned each module power supply is provided, described power module respectively with described first detection module,The second detection module, processing module and ON-OFF control circuit electrically connect.
Described first detection module comprises whether detect chamber door 60 produces obliquity sensor 51 and the operation amplifier electricity of skewRoad 52, described obliquity sensor 51 is fixed on chamber door 60 inwalls, the signal output part of this obliquity sensor 51 and operation amplifierThe signal input part of circuit 52 is connected, and this operational amplification circuit 52 is for amplifying the shifted signal receiving.
Described the second detection module comprises and is arranged on locking bar 30 or lower locking bar 31 Hall switch near one end of lockhole32, and be 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 of detection signal negate 53, for the signal after anti-phase is patrolledCollect the AND circuit 54 of computing; The signal input part of described phase inverter 53 is connected with the signal output part of operational amplification circuit 52,The signal input part of this phase inverter 53 is also connected with the signal output part of Hall switch 32; Two signals of described phase inverter 53 are defeatedGoing out end is 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, the signal input part of described amplifying circuit 55The signal output part of AND circuit 54 is connected, and the signal input part of described amplifying circuit 55 is also exported with the signal of on-off circuit 56End is connected.
As shown in Figure 3, described obliquity sensor 51 is installed in lock housing 41 inside. Described obliquity sensor 51 adopts SCA60CType obliquity sensor, the GND port ground connection of described sensor SCA60C, is also connected with positive source by filter capacitor C12, instituteThe vdd terminal mouth of stating sensor SCA60C is connected with positive source, the CLK port of described sensor SCA60C, C1 port, MOD endMouth is all connected with the PGM port of sensor SCA60C by wire.
Described operational amplification circuit 52 comprises operational amplifier CA3140, the NON-INV of described operational amplifier CA3140Input port is connected with the OUT output port of sensor SCA60C; The OUTPUT output port of described operational amplifier CA3140Be connected with one end of the first feedback resistance R13, the other end of described the first feedback resistance R13 and operational amplifier CA3140'sINV input port is connected, and the other end of described the first feedback resistance R13 is also connected with one end of the second feedback resistance R8, described inThe other end ground connection of the second feedback resistance R8, described the first feedback resistance R13 and the second feedback resistance R8 jointly form computing and putThe feedback circuit of large circuit;
The OFFSET2 port of a described operational amplifier CA3140 i.e. zeroing end is connected with one end of adjustable resistance R6,The other end of described adjustable resistance R6 is that another zeroing end is connected with OFFSET1 port, and the slip of described adjustable resistance R6 is touchedPoint is connected with one of them zeroing end of operational amplifier CA3140, also ground connection of described adjustable resistance R6, described adjustable resistance R6For the bias voltage of operational amplifier CA3140 is set, guarantee that amplifier is undistorted, in work amplification region.
Described phase inverter 53 is 74LS04, the OUTPUT of described 74LS04 the 1st input port and operational amplifier CA3140Output port is connected, and described 74LS04 the 2nd input port is connected with the output port of Hall switch Y3144, described HallThe output port of switch Y3144 is also connected with the 1st port of this Hall switch Y3144 by resistance R 10.
Described AND circuit 54 is 74LS08, the IN1 input port of described 74LS08 and the OUT1 output port of 74LS04Be connected, the IN2 input port of described 74LS08 is connected with the OUT2 output port of 74LS04.
Described amplifying circuit 55 comprises triode Q2, and the base stage of described triode Q2 is by current-limiting resistance R12 and 74LS08OUT3 output port be connected, current-limiting resistance R12 guarantees that the electric current of the base stage that flows into triode Q2 can not burn out triode Q2, instituteThe base stage of stating triode Q2 is also connected with on-off circuit by pressure limiting resistance R 7, described pressure limiting resistance R 7 ensure triode Q2 inThe very high-order electricity of current collection when amplification region, the grounded emitter of described triode Q2, the colelctor electrode of described triode Q2 and switch electricityRoad is connected.
Described on-off circuit 56 comprises normally opened relay K2, the coil input end mouth of described normally opened relay K2 and power supply mouldPiece is connected, and the coil output mouth of described normally opened relay K2 is connected with the colelctor electrode of triode Q2, described normally opened relay K2Coil two ends reverse parallel connection a sustained diode 2, described sustained diode 2 is for preventing that relay is in break-make patternElectric current reverse breakdown triode when switching, the negative electrode of described sustained diode 2 is connected with one end of pressure limiting resistance R 7, described limitOne end of piezoresistance R7 is connected and is also connected with the coil output of normally opened relay, the other end of described pressure limiting resistance R 7 and three utmost pointsThe base stage of pipe Q2 is connected;
The input of the normally opened contact of described normally opened relay K2 is connected with 24V power supply, and the output of this normally opened contact is logicalCrossing wire 42 is electrically connected with the coil in described electromagnet 43.
Further, the power module being connected with Hall switch 32, phase inverter 53, AND circuit 54 is 5V power supply, with inclination angleSensor 51, operational amplification circuit 52, the connected power module of normally opened relay coil are 12V power supply.
Operation principle of the present invention is as follows:
Adopt SCA60C type obliquity sensor as the sensor that detects chamber door deviation angle, this obliquity sensor is oneKind adopt quartz flexible servo accelerometer as sensing element, be the servo-drive system of a force balance type, when sensor relativeIn the time that earth center of gravity direction produces inclination angle theta, due to Action of Gravity Field, in sensor, sensing element swings one with respect to plummet directionAngle, becomes voltage signal by high-sensitive quartz transducer by this angular transition.
Therefore,, in the time that chamber door 60 skews reach the detection inclination angle theta of obliquity sensor, obliquity sensor SCA60C detects angleWhen degree changes, can export corresponding magnitude of voltage at OUT output port, and by the OUT output port of obliquity sensor SCA60CThe input port that corresponding magnitude of voltage is loaded into operational amplification circuit 52, then carries out amplifier.
The NON-INV input port of operational amplifier CA3140 in described operational amplification circuit 52 receives described inclination angle and passesThe magnitude of voltage that the OUT output port of sensor SCA60C sends, and after the signal receiving is amplified, export by OUTPUTIn port input inverter 53, carry out negate.
Described honeywell switch sensor Y3144, passes through this sensor Y3144's the status information of the locking bar detectingOUT output port output, and be loaded into and in phase inverter, carry out negate.
Described phase inverter 74LS04, the 1st input port of this phase inverter receives described operational amplifier CA3140'sThe amplifying signal of OUTPUT output port output, signal, through after negate, is loaded into by the OUT1 output port of phase inverterIn AND circuit;
The 2nd input port of phase inverter 74LS04 receives the letter of the OUT output port output of honeywell switch sensor Y3144Number, signal, through 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 OUT1 output of phase inverterThe signal of port output, the signal of the OUT2 output port output of the IN2 input port phase inverter of AND circuit 74LS08, and willTwo kinds of signals that receive carry out logic and operation, are then loaded into amplification by the OUT3 output port of AND circuit 74LS08In circuit.
In described amplifying circuit, the OUT3 output port of the base input end of triode Q2 reception AND circuit 74LS08 is defeatedThe signal going out, signal through amplification after, the break-make of normally opened relay K2 in driving switch circuit 56.
Whether described on-off circuit 56 is switched on and is decided often opening of normally opened relay K2 according to the coil of normally opened relay K2Whether contact is closed, thereby determines whether can power to electronic lock.
In addition, the present invention can set up two to three electronic locks of said structure in chamber door inner side as required.
Claims (6)
1. for the theftproof lock of fiber cable cross connection box, comprise the mechanical lock body (20) being arranged on chamber door, described mechanical lock body(20) be hinged with one end of upper locking bar (30), lower locking bar (31) respectively, the other end of described upper locking bar (30), lower locking bar (31) withThe lockhole (46) being arranged on casing (10) upper door frame (13), lower door frame (14) matches, and it is characterized in that: this theftproof lock also wrapsDraw together the electronic lock and the control system thereof that when at least one handle is subject to impact damage for chamber door (60), increase locking point, described electronic lockComprise the lock housing (41) that is arranged on chamber door (60) inner side, in lock housing (41), be provided with electromagnet (43), the control of described lock housing (41)End is provided with the wire (42) be electrically connected with described control system, described wire (42) stretch into lock housing (41) inside and with described electromagnetismBody (43) is connected; In described lock housing (41), be also provided with under electromagnet (43) effect reciprocating action and make the case of fiber cable cross connection boxThe lock pin (44) that door (60) opens and closes, the shaft outside of this lock pin (44) is arranged with back-moving spring (45), outside described casing (10)On side door frame (12), have the pin-and-hole (121) coordinating with lock pin (44);
Described control system comprises:
Whether first detection module, produce skew for detection of chamber door (60);
The second detection module, for detection of mechanical lock open/close states;
Processing module, for receiving and process the detection signal of first detection module and the output of the second detection module; Described firstThe signal of telecommunication and described the second detection module output signal that detection module sends chamber door generation skew are that mechanical lock is in opening shapeWhen state, this processing module is to the ON-OFF control circuit output release signal of telecommunication;
ON-OFF control circuit, for receiving the signal of telecommunication of described processing module output, and controls the electricity to electromagnet (43) power supplyWhether source is in conducting state; When the described processing module output release signal of telecommunication, this ON-OFF control circuit is connected electromagnet (43)Power supply;
Power module, for providing power supply to above-mentioned each module.
2. the theftproof lock for fiber cable cross connection box as claimed in claim 1, is characterized in that: described first detection module comprisesDetect chamber door (60) and whether produce obliquity sensor (51) and the operational amplification circuit (52) of skew, described obliquity sensor (51)Be fixed on chamber door (60) inwall the signal input of the signal output part of this obliquity sensor (51) and operational amplification circuit (52)End is connected, and this operational amplification circuit (52) is for amplifying the shifted signal receiving.
3. the theftproof lock for fiber cable cross connection box as claimed in claim 2, is characterized in that: described the second detection module comprisesBe arranged on locking bar (30) or lower locking bar (31) Hall switch (32) near one end of lockhole, and be arranged on casing (10)Magnet (11); Described Hall switch (32) forms matching relationship with described magnet (11).
4. the theftproof lock for fiber cable cross connection box as claimed in claim 3, is characterized in that: described processing module comprise forBy the phase inverter of detection signal negate (53), for the signal after anti-phase being carried out to the AND circuit (54) of logical operation; DescribedThe signal input part of phase inverter (53) is connected with the signal output part of operational amplification circuit (52), and the signal of this phase inverter (53) is defeatedEntering end is also connected with the signal output part of Hall switch (32); Two signal output parts of described phase inverter (53) respectively with doorTwo signal input parts of circuit (54) are connected.
5. the theftproof lock for fiber cable cross connection box as claimed in claim 4, is characterized in that: described ON-OFF control circuit comprisesAmplifying circuit (55) and on-off circuit (56), the signal of the signal input part of described amplifying circuit (55) and AND circuit (54) is defeatedGo out end and be connected, 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 claim 2～5 any one, is characterized in that: described inclination angle passesSensor (51) is installed in lock housing (41) inside.
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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| Publication Number | Publication Date |
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| CN104453479A CN104453479A (en) | 2015-03-25 |
| CN104453479B true 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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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106237361B (en) * | 2016-08-31 | 2022-04-05 | 宁波明太医疗器械有限公司 | Sterilizer door lock locking device with improved structure |
| 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 |
| 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 |
| CN111446634B (en) * | 2020-04-15 | 2021-10-26 | 东莞祥科智控装备有限公司 | Thing networked control cabinet |
| CN113668956B (en) * | 2021-07-27 | 2022-12-20 | 北京智胜远景科技有限公司 | 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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| CN2644600Y (en) * | 2003-09-03 | 2004-09-29 | 骆永成 | Door lock of optical cable cross-connecting box |
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| CN201212921Y (en) * | 2008-07-08 | 2009-03-25 | 常州太平电器有限公司 | Portable optical cable distributing box |
| CN204370937U (en) * | 2014-12-12 | 2015-06-03 | 国家电网公司 | For the theftproof lock of fiber cable cross connection box |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US8468896B2 (en) * | 2009-12-23 | 2013-06-25 | Verizon Patent And Licensing Inc. | Media cross-sectional and axial bend uniformity tester |
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|---|---|---|---|---|
| CN2644600Y (en) * | 2003-09-03 | 2004-09-29 | 骆永成 | Door lock of optical cable cross-connecting box |
| CN2685481Y (en) * | 2004-02-20 | 2005-03-16 | 骆永成 | Optical cable distribution box |
| CN201212921Y (en) * | 2008-07-08 | 2009-03-25 | 常州太平电器有限公司 | Portable optical cable distributing box |
| CN204370937U (en) * | 2014-12-12 | 2015-06-03 | 国家电网公司 | For the theftproof lock of fiber cable cross connection box |
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| CN104453479A (en) | 2015-03-25 |
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