CN103527010B - A kind of electronic lock peg - Google Patents

A kind of electronic lock peg Download PDF

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Publication number
CN103527010B
CN103527010B CN201310457029.8A CN201310457029A CN103527010B CN 103527010 B CN103527010 B CN 103527010B CN 201310457029 A CN201310457029 A CN 201310457029A CN 103527010 B CN103527010 B CN 103527010B
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Prior art keywords
electronic lock
layer
lock peg
conductive layer
pvc material
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CN201310457029.8A
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CN103527010A (en
Inventor
刘干伟
闫稳星
蒋育成
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Zhejiang Yizhou Electronic Technology Co Ltd
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Zhejiang Yizhou Electronic Technology Co Ltd
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92561—Time, e.g. start, termination, duration or interruption
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/9259—Angular velocity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/92704—Temperature
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92876—Feeding, melting, plasticising or pumping zones, e.g. the melt itself
    • B29C2948/92885—Screw or gear

Abstract

The present invention relates to a kind of electronic lock peg, this electronic lock peg comprises the restrictive coating of conductive layer, the spinning layer of coated with conductive layer, the separation layer of cover-spinning layer and coated separation layer.Conductive layer is made by conducting electricity PVC material, and PVC material of wherein conducting electricity is made up of polyvinyl chloride resin, impact modifier, inorganic nano-particle, heat stabilizer, processing aid, carbon black, sliding agent, flexibilizer.The preparation method of this electronic lock peg comprises the preparation of conduction PVC material, then the conductive layer outer cladding spinning layer be made up of conduction PVC material, at the separation layer that spinning layer outer cladding polyester belt is made, the restrictive coating made in separation layer outer cladding PBT material finally by sheath machine obtains electronic lock peg.Electronic lock peg prepared by the present invention has signal connection function, and there is the shielding of antistatic, Electromagnetic Interference, resilience is good, mechanical performance is excellent, weatherability is strong, long service life.

Description

A kind of electronic lock peg
Technical field
The present invention relates to a kind of peg, particularly relate to a kind of electronic lock peg.
Background technology
Electronic password lock a kind of comes control circuit or chip operation by Password Input, thus control the closed of mechanical switch, complete unblank, the electronic product of locking task.Electronic lock is in safety technological guard field, the electronic password lock with anti-theft alarm function replaces traditional mechanical code lock, overcome that mechanical code lock number of password is few, the shortcoming of poor safety performance, make coded lock all greatly improve a step technically or in performance.Its kind is a lot: non-door lock electron-like lock is that one is mainly used in the transport fields such as logistics transportation, storage, fresh milk transport vehicle, armoured van, refrigerator car, drug delivery, tobacco transport.Be mainly used in transportation vehicle door, on special purpose vehicle manhole cover and warehouse gate, ensure transport or guard the safety of goods, prevent pilferage behavior.This electronic lock adopts mechanical lock bond networking correlation technique, the built-in radio receiving transmitting module of lock body, when lock body open and close, radio receiving transmitting module by open and close lock signal remote transmission to monitoring host computer.The unlocking signal received as monitoring host computer appears at abnormal period, then this signal be judged as pirate of the open and prized signal, monitoring host computer produces warning message immediately, so that related personnel deals with in time, prevents the loss of finance.
Summary of the invention
The object of the present invention is to provide a kind of can the electronic lock peg of good, the long service life of connection signal, shielding electromagnetic interference, mechanical property.
The present invention realizes by following technical proposal: a kind of electronic lock peg, this electronic lock peg is made up of four-layer structure, wherein four-layer structure includes conductive layer, conductive layer to be coated with on spinning layer, spinning layer and is coated with separation layer, and separation layer is coated with restrictive coating.
Electronic lock peg of the present invention is made up of four-layer structure, and wherein four-layer structure includes conductive layer, conductive layer to be coated with on spinning layer, spinning layer and is coated with separation layer, and separation layer is coated with restrictive coating.Conductive layer selects conduction PVC material to make, and has the advantages such as antistatic, Electromagnetic Interference shields, hardness is high, mechanical property is good.And the present invention is coated with spinning layer and separation layer outward successively in conduction PVC material, not only can play the effect of insulating properties, available protecting conduction PVC material, can also play the effect strengthening peg intensity.Restrictive coating of the present invention adopts PBT material to make, and hardness is high, mechanical strength good, bending modulus is high, linear expansion coefficient is low, weatherability is strong, long service life.Therefore, the electronic lock peg that the present invention obtains can not only connection signal, the shielding of antistatic, Electromagnetic Interference, and hardness is high, mechanical property is good, weatherability is strong, long service life.
As preferably, described conductive layer is made by conducting electricity PVC material, and described conduction PVC material is made up of the composition of following parts by weight:
Polyvinyl chloride resin is a kind of polarity amorphism high polymer, has stronger active force between molecule, is a kind of hard and crisp versatile material.To there is the carbon black filled in polyvinyl chloride resin of electric conductivity, can obtain a kind ofly not only having there is electric conductivity cost but also low PVC composite material.And appropriate carbon black can also improve the mechanical property of PVC material.Experiment shows, when carbon black addition is greater than 15 parts, carbon black forms the chain turning circuit on microcosmic, but after the contiguous network of carbon black particle is formed, continues to increase content of carbon black no longer remarkable on the impact of composite material conductive ability.In mechanical property, the hot strength of PVC composite material first raises rear decline with the increase of content of carbon black, and when the addition of carbon black is in the scope of 15-30 part, the hot strength of PVC composite material is relatively better.But along with the increase of carbon black addition, the impact strength of PVC composite material reduces gradually, therefore, the addition of carbon black is controlled within the scope of 15-25 part, can ensure that the electric conductivity of PVC composite material can ensure again the comprehensive mechanical property of PVC composite material.
As preferably, the impact modifier in described conduction PVC material is styrol copolymer ABS, MBS, acrylic compounds, one or more in EPDM, TPE, CPE.The impact strength of polyvinyl chloride resin is lower, and adding of carbon black makes the impact strength of PVC composite material reduce further, therefore, needs to add impact modifier.The elastomer particle of impact modifier can reduce total crazing and cause stress, and utilizes distortion and the shear band of particle self, stops crazing to expand and increases, sponging the impact energy imported in material bodies, thus reach shock proof object.The particle of impact modifier is less, is more beneficial to the quantity increasing modifier in Unit Weight or unit volume, its effective volume number is improved, thus enhances the ability of dispersive stress.
As preferably, the inorganic nano-particle in described conduction PVC material is nano-TiO 2, Nano-meter CaCO3 3in one or both, described inorganic nano-particle particle diameter is 200-400nm.Add nano-TiO in right amount 2and CaCO 3not only increase the electric property of conduction PVC material, also help antibacterial.The dispersion of carbon black in PVC matrix, improve hot strength and the impact strength of PVC, its fluidity of molten also makes moderate progress simultaneously.After nano inoganic particle refinement, volume reduces, and specific area increases, and increases with polyvinyl chloride resin contact area.When material is subject to External Force Acting, the nano inoganic particle of rigidity can cause polyvinyl chloride resin crazingization to absorb energy.Serve the adding in right amount of nano inoganic particle the effect regulating PVC toughness, make crisp, the tough ratio that infill system reaches certain, such stiff differential equations causes the more crazing of matrix, absorb more energy, in mixture, add proper amount of nano inorganic particulate, can play toughness reinforcing, strengthen, improve elongation at break triple effect.But if inorganic nano-particle consumption is too much, particle diameter is excessive, and too close between particle, crazing can be combined into large crackle, and mechanical property still can be caused to reduce.Therefore, obtain through experiment, the particle diameter of inorganic nano-particle is 200-400nm, and addition controls when 0.5-1.5 part, and conduction PVC material mechanical property reaches best.
As preferably, the heat stabilizer in described conduction PVC material is one or more in alkali formula lead salt, metallic soap, organotin, epoxide, phosphite ester, polyalcohol.Heat stabilizer can stop, reduce the degraded of material effectively, even makes material degradation substantially stop.The most important reason of PVC degraded is dehydrochlorination, along with the continuation of dehydrochlorination process, occurs conjugated double bond, the wavelength of Polymer absorption light changes, when there is 6 or 7 polyene structures in a conjugated system, PVC molecule absorption ultraviolet light, presents yellow.Along with the continuation of degradation process, double bond increases, and absorb optical wavelength change, the color of PVC also deepens gradually, until blackening completely.When polymer further impaired time, be then oxidized, chain rupture, be finally cross-linked.In order to make up the major defect of PVC homopolymers and copolymer to greatest extent, need to eliminate with heat stabilizer the unstable position causing dehydrochlorination, remove hydrogen chloride, with the radical reaction produced, change polyene structure to stop color change, molecular chain rupture and to be cross-linked.
As preferably, the sliding agent in described conduction PVC material is one or more in amide waxe, calcium stearate, OPE, stearic acid, tristerin, paraffin, Tissuemat E.Sliding agent has good compatibility with conduction PVC material, and it plays in conduction PVC material inside the effect reducing conduction PVC material intermolecular cohesion, thus improves interior frictional heat and the mobility of conduction PVC material melt.
As preferably, the processing aid in described conduction PVC material is one or more in methyl methacrylate and acrylate copolymer, methyl methacrylate and styrol copolymer, acrylonitrile and styrol copolymer.Processing aid can accelerate to conduct electricity the plasticizing process of PVC material, improves the rheological property of melt, improves melt mechanical property under thermoelasticity state, improves the comprehensive functions such as the presentation quality of conduction PVC material.
As preferably, the flexibilizer in described conduction PVC material is one or more in A-603 liquid flexibilizer, A-669 toughener, A-621 powder flexibilizer.Flexibilizer not only can improve the dispersiveness of filler in PVC system, reduces plasticization temperature, can also improve the mechanical property of conduction PVC material, obtain good plasticizing effect.
As preferably, described conductive layer external diameter is 1.5-1.7mm.
As preferably, described separation layer is made up of polyester belt.Polyester belt adopts polyester film to cut through machinery to form, and it has higher mechanical strength, insulating properties, high-and low-temperature resistance.The separation layer of electronic lock peg adopts polyester belt to make, and can not only play good insulating properties, can also improve the mechanical strength of electronic lock peg greatly, weatherability, also has certain protective effect in addition, ensure not loose to the colligation of spinning layer and conductive layer.
As preferably, described restrictive coating is made up of PBT material.The Main Function of restrictive coating improves the abilities such as the mechanical strength of electronic lock peg, anti-chemical burn into are moistureproof, fire-retardant.PBT is a kind of crystalline line style saturated polyester resin, there is high, the good mechanical strength of hardness, bending modulus is high, linear expansion coefficient is low, chemical resistance is good, friction factor is little, resistant to hydrolysis performance is good, be applicable to use in the presence of a harsh environment, and can directly adopt conventional extruder to process, moulding processability is good, self-lubricating property is good, crystallization rate is fast, can control the remaining length of conduit wiring better, and therefore PBT becomes the preferred material of restrictive coating.
As preferably, described restrictive coating external diameter is 2.7-2.9mm.
Another object of the present invention is the preparation method providing this electronic lock peg, comprises the following steps:
S1: take polyvinyl chloride resin, impact modifier, inorganic nano-particle, heat stabilizer, processing aid, carbon black, sliding agent, flexibilizer by ratio of weight and the number of copies, then polyvinyl chloride resin and impact modifier, inorganic nano-particle, heat stabilizer, processing aid, sliding agent, flexibilizer are added in homogenizer and stir 5-10min, then added in homogenizer by carbon black and stir, whipping temp is 100-110 DEG C;
S2: the powder stirred is joined extruding pelletization in double screw extruder by feeding machine;
S3: above-mentioned obtained pellet injection machine is made conduction PVC material, is used for preparing conductive layer; Then at conductive layer outer cladding spinning layer, at the separation layer that spinning layer outer cladding polyester belt is made, finally by the restrictive coating that sheath machine is made up of PBT material in separation layer outer cladding, shaping electronic lock peg is packed.
As preferably, in described step S2, extrusion temperature is 160-180 DEG C, and feeding frequency is 20-25 hertz, and rotating speed is 350-450 rev/min.
As preferably, in described step S3, injection pressure is 65-75MPa, injection temperature 175-185 DEG C, injection time 1-4s.
The present invention has the following advantages:
1. the electronic lock peg that prepared by the present invention has signal connection function.
2. the electronic lock peg prepared of the present invention has the functions such as antistatic, electrostatic dissipation, Electromagnetic Interference shielding, good-extensibility, resilience are good by conduction PVC material.
3. the electronic lock peg hardness prepared of the present invention is high, mechanical performance is excellent, bending modulus is high, mechanical property is good, weatherability is strong, linear expansion coefficient is low, long service life.
Accompanying drawing explanation
Fig. 1 is the sectional view of electronic lock peg of the present invention.
As shown in the figure: 11: conductive layer; 12: spinning layer; 13: separation layer; 14: restrictive coating.
Fig. 2 is the overall diagram of electronic lock peg of the present invention.
As shown in the figure: 10: electronic lock peg; 20: electronic lock body.
Detailed description of the invention
Be below specific embodiments of the invention, and by reference to the accompanying drawings technical scheme of the present invention be further described, but the present invention is not limited to these embodiments.
Please refer to the sectional view that Fig. 1,2, Fig. 1 is electronic lock peg of the present invention, Fig. 2 is the overall diagram of electronic lock peg of the present invention.In Fig. 1, electronic lock peg of the present invention is made up of four-layer structure, and wherein four-layer structure includes conductive layer 11, conductive layer 11 to be coated with on spinning layer 12, spinning layer 12 and is coated with separation layer 13, separation layer 13 is coated with restrictive coating 14.
Conduction PVC material 11 is made up of following parts by weight composition: polyvinyl chloride resin 90-100 part, impact modifier 5-10 part, inorganic nano-particle 0.5-1.5 part, heat stabilizer 3-5 part, processing aid 1-3 part, carbon black 15-25 part, sliding agent 1-3 part, flexibilizer 1-3 part, wherein the TiO of inorganic nano-particle to be particle diameter be 200-400nm 2and CaCO 3in one or both.Conductive layer 11 is made up of conduction PVC material, and external diameter is 1.5-1.7mm.Separation layer 13 is made up of polyester belt, and restrictive coating 14 is made up of PBT material, and external diameter is 2.7-2.9mm.
Embodiment 1:
Take polyvinyl chloride resin 90 parts, impact modifier MBS 5 parts, particle diameter are the inorganic nano TiO of 0.2 μm 20.5 part, organic tin stabilizer 3 parts, methyl methacrylate and acrylate copolymer 1 part, amide waxe 1 part, A-603 liquid flexibilizer 1 part of homogenizer being placed in 100 DEG C stir 5min, then take 15 parts of carbon blacks and add in homogenizer and stir.Then add extruding pelletization in double screw extruder, double screw extruder temperature is set as 160 DEG C, feeding frequency 20 hertz, and rotating speed is 350 revs/min.Finally with injection machine injection pressure be 65MPa, injection temperature be the condition of 175 DEG C under in 2s injection moulding make the conduction PVC material of external diameter 1.5mm.
Then obtained conduction PVC material is made conductive layer, and then conductive layer outer cladding spinning layer, at the separation layer that spinning layer outer cladding polyester belt is made, finally by the restrictive coating that sheath machine is made in the PBT material of separation layer outer cladding external diameter 2.7mm, pack shaping electronic lock peg.
Embodiment 2:
Take polyvinyl chloride resin 90 parts, impact modifier CPE5 part, particle diameter are the inorganic nano CaCO of 0.2 μm 30.5 part, alkali formula lead salt stabilizer 3 parts, methyl methacrylate and styrol copolymer 1 part, calcium stearate 1 part, A-603 liquid flexibilizer 1 part of homogenizer being placed in 100 DEG C stir 5min, then take 20 parts of carbon blacks and add in homogenizer and stir.Then add extruding pelletization in double screw extruder, double screw extruder temperature is set as 160 DEG C, feeding frequency 25 hertz, and rotating speed is 400 revs/min.Finally with injection machine injection pressure be 70MPa, injection temperature be the condition of 180 DEG C under in 3s injection moulding make the conduction PVC material of external diameter 1.6mm.
Then obtained conduction PVC material is made conductive layer, and then conductive layer outer cladding spinning layer, at the separation layer that spinning layer outer cladding polyester belt is made, finally by the restrictive coating that sheath machine is made in the PBT material of separation layer outer cladding external diameter 2.8mm, pack shaping electronic lock peg.
Embodiment 3:
Take polyvinyl chloride resin 95 parts, impact modifier MBS 10 parts, particle diameter are the inorganic nano CaCO of 0.3 μm 31.5 parts, organic tin stabilizer 5 parts, acrylonitrile and styrol copolymer 2 parts, OPE 2 parts, A-603 liquid flexibilizer 3 parts of homogenizers being placed in 110 DEG C stir 8min, then take 25 parts of carbon blacks and add in homogenizer and stir.Then add extruding pelletization in double screw extruder, double screw extruder temperature is set as 160 DEG C, feeding frequency 25 hertz, and rotating speed is 450 revs/min.Finally with injection machine injection pressure be 75MPa, injection temperature be the condition of 185 DEG C under in 4s injection moulding make the conduction PVC material of external diameter 1.7mm.
Then obtained conduction PVC material is made conductive layer, and then conductive layer outer cladding spinning layer, at the separation layer that spinning layer outer cladding polyester belt is made, finally by the restrictive coating that sheath machine is made in the PBT material of separation layer outer cladding external diameter 2.9mm, pack shaping electronic lock peg.
Conduction PVC material in embodiment 1-3 is carried out performance test, and result is as shown in table 1.
The performance test results of the conduction PVC material in table 1 embodiment 1-3
The electronic lock peg that embodiment 1-3 is obtained carries out performance test, and result is as shown in table 2.
The electronic lock peg the performance test results that table 2 embodiment 1-3 is obtained
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Although made a detailed description the present invention and quoted some specific embodiments as proof, to those skilled in the art, only otherwise it is obvious for leaving that the spirit and scope of the present invention can make various changes or revise.

Claims (9)

1. an electronic lock peg, it is characterized in that, described electronic lock peg is made up of four-layer structure, and wherein four-layer structure includes conductive layer, described conductive layer to be coated with on spinning layer, described spinning layer and is coated with separation layer, and described separation layer is coated with restrictive coating;
Wherein, described conductive layer is made by conducting electricity PVC material, and described conduction PVC material is made up of the composition of following parts by weight:
2. a kind of electronic lock peg according to claim 1, is characterized in that, the inorganic nano-particle in described conduction PVC material is nano-TiO 2, Nano-meter CaCO3 3in one or both, described inorganic nano-particle particle diameter is 200-400nm.
3. a kind of electronic lock peg according to claim 1, is characterized in that, described conductive layer external diameter is 1.5-1.7mm.
4. a kind of electronic lock peg according to claim 1, it is characterized in that, described separation layer is made up of polyester belt.
5. a kind of electronic lock peg according to claim 1, it is characterized in that, described restrictive coating is made up of PBT material.
6. a kind of electronic lock peg according to claim 5, is characterized in that, described restrictive coating external diameter is 2.7-2.9mm.
7. a preparation method for electronic lock peg, is characterized in that, described preparation method comprises the following steps:
S1: take polyvinyl chloride resin, impact modifier, inorganic nano-particle, heat stabilizer, processing aid, carbon black, sliding agent, flexibilizer by ratio of weight and the number of copies, then polyvinyl chloride resin and impact modifier, inorganic nano-particle, heat stabilizer, processing aid, sliding agent, flexibilizer are added in homogenizer and stir 5-10min, then added in homogenizer by carbon black and stir, whipping temp is 100-110 DEG C;
S2: the powder stirred is joined extruding pelletization in double screw extruder by feeding machine;
S3: above-mentioned obtained pellet injection machine is made conduction PVC material, is used for preparing conductive layer; Then at conductive layer outer cladding spinning layer, at the separation layer that spinning layer outer cladding polyester belt is made, finally by the restrictive coating that sheath machine is made up of PBT material in separation layer outer cladding, shaping electronic lock peg is packed.
8. the preparation method of electronic lock peg according to claim 7, is characterized in that, in described step S2, extrusion temperature is 160-180 DEG C, and feeding frequency is 20-25 hertz, and rotating speed is 350-450 rev/min.
9. the preparation method of electronic lock peg according to claim 7, is characterized in that, in described step S3, injection pressure is 65-75MPa, injection temperature 175-185 DEG C, injection time 1-4s.
CN201310457029.8A 2013-09-29 2013-09-29 A kind of electronic lock peg Active CN103527010B (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2453081Y (en) * 2000-11-02 2001-10-10 杨伯英 Steel wire lock with alarming means
CN102194543A (en) * 2010-02-17 2011-09-21 日立电线株式会社 Radiation resistant electric wire and radiation resistant cable

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103282591B (en) * 2010-09-28 2016-02-17 斯达康全球定位系统有限公司 For the state detector of remote tracing padlock and communication unit and system

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2453081Y (en) * 2000-11-02 2001-10-10 杨伯英 Steel wire lock with alarming means
CN102194543A (en) * 2010-02-17 2011-09-21 日立电线株式会社 Radiation resistant electric wire and radiation resistant cable

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