CN105301309B - A kind of safe anti-electricity-theft electric energy meter case - Google Patents

A kind of safe anti-electricity-theft electric energy meter case Download PDF

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Publication number
CN105301309B
CN105301309B CN201510653529.8A CN201510653529A CN105301309B CN 105301309 B CN105301309 B CN 105301309B CN 201510653529 A CN201510653529 A CN 201510653529A CN 105301309 B CN105301309 B CN 105301309B
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CN
China
Prior art keywords
relay
iron plate
lock
switch
absorption iron
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201510653529.8A
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Chinese (zh)
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CN105301309A (en
Inventor
孙东
王�锋
庄强
金琳
李思同
匡荣
赵静
王晓梅
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Corp of China SGCC
Original Assignee
State Grid Corp of China SGCC
Rizhao Power Supply Co of State Grid Shandong Electric Power Co Ltd
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Filing date
Publication date
Application filed by State Grid Corp of China SGCC, Rizhao Power Supply Co of State Grid Shandong Electric Power Co Ltd filed Critical State Grid Corp of China SGCC
Priority to CN201510653529.8A priority Critical patent/CN105301309B/en
Publication of CN105301309A publication Critical patent/CN105301309A/en
Application granted granted Critical
Publication of CN105301309B publication Critical patent/CN105301309B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The invention discloses a kind of safe anti-electricity-theft electric energy meter casees, including babinet, chamber door and open up lock, electromagnetic lock is further included, electromagnetic lock includes the lock body being arranged on babinet and the absorption iron plate being used cooperatively with lock body, and absorption iron plate is movably arranged on by draw-off mechanism on chamber door.The beneficial effects of the invention are as follows:The ammeter box of the present invention is provided with authentication switch, and when user's private opening ammeter box, earth leakage protective device starts, and supply line is disconnected, user is avoided to overlap circuit privately, while from also eliminating security risk.

Description

A kind of safe anti-electricity-theft electric energy meter case
Technical field
The present invention relates to thief-proof electric equipment, more particularly to a kind of safe anti-electricity-theft electric energy meter case.
Background technology
The generation of power supply department stealing electricity phenomenon in order to prevent, the measure generally taken is that ammeter is put into ammeter box, is used The mechanical lock locking ammeter box chamber door opened up is arbitrarily opened to prevent other staff, it is existing use to open up lock construction simple, easily It is opened by artificial destruction, area not in place is especially supervised in some ammeter boxes, is often opened privately by user, overlap circuit, Electric energy is stolen, not only causes serious economic loss to power department, but also there are security risks for stealing, current ammeter box is not Safe and effective thief-proof electro ultrafiltration can be played.
Invention content
It, can be safely, effectively the present invention provides one kind in order to solve the problems such as traditional ammeter box power-steeling preventing effect is bad Anti-electricity-theft ammeter box.
In order to achieve the above-mentioned object of the invention, the present invention provides a kind of safe anti-electricity-theft electric energy meter case, including testing button, The testing button is the leakage tests button of earth leakage protective device being connect with the ammeter box metering circuit, which is characterized in that Further include authentication switch, relay A, relay B and enabling inductor;The enabling inductor is with the relay A's Coil is connected, the coil of the normally opened contact of the relay A, authentication switch and the relay B it is in series it is described after The driving circuit of electric appliance B, the testing button is in parallel with the normally-closed contact of the relay B to form execution circuit.Wherein, it is described Authentication switch is usually that closure or the authentication are switched as normally closed switch.
Control circuit of the driving circuit of the relay A also with an electromagnetic lock is connect.
The authentication switch is infrared remote control switch, and the material of the ammeter box is made of hard engineering plastic, such as The reception antenna of makrolon, polyformaldehyde, polyamide, thermoplastic's polyester or Noryl etc. or infrared receiver The outside of the ammeter box is arranged on, infrared signal is avoided to shield.The infrared remote control switch includes button, infrared emitting Device, infrared receiver and relay C, the normally-closed contact of the relay C are connected with the normally opened contact of the relay A, institute The output terminal for stating infrared receiver is connect with the coil of the relay B, for the relay C to be driven to be turned by normally-closed contact For normally opened contact.Further, the authentication switch can also be preferably contact switch, and the contact switch is arranged on institute In the lock core for opening up lock for stating ammeter box, when opening up locking conjunction, contact switch is in closed state, when insertion key rotation lock When core is unlocked, contact switch disconnects.
Wherein, the enabling inductor is correlation optoelectronic switch.
The ammeter box includes babinet, chamber door and opens up lock, further includes the electromagnetic lock, and the electromagnetic lock includes being arranged on Lock body on the babinet and the absorption iron plate being used cooperatively with the lock body, the absorption iron plate are set by draw-off mechanism activity It puts on the chamber door;
The draw-off mechanism includes the bar shaped fixing groove and be arranged in the fixing groove that one end is closed and cross section is U-shaped Spring, the fixing groove include two side walls, bottom plate and blind end, the spring one end is fixed on the blind end, described The spring other end is connect with the absorption iron plate, and the absorption iron plate is vertically arranged in the fixing groove.
The draw-off mechanism further includes the rolling assembly being arranged in the fixing groove, and the absorption iron plate passes through the rolling Dynamic component is connect with the spring, and the rolling assembly includes a pair of of idler wheel and connects the connecting shaft of the idler wheel, the connection Fixed link is provided on axis, the upper end of the fixed link is provided with cylindrical end tangs, and it is convex that the absorption iron plate is fixed on the cylindricality On platform, the lower face of the cylindrical end tangs is contacted with the upper surface of the side wall, and the spring is connect with the fixed link.
The track being used cooperatively with the idler wheel is additionally provided on the bottom plate.
Chain is further included, one end of the chain is fixed on babinet, and the other end of the chain is fixed on the fixation On bar.
At present, ammeter box is mostly arbitrarily opened using the mechanical lock locking ammeter box opened up to prevent other staff, but due to Above-mentioned mechanical lock structure is simple, it is easy to which artificial destruction especially supervises area not in place, often by user in some ammeter boxes It opens privately, overlaps circuit, steal electric energy, not only cause serious economic loss to power department, but also stealing has safety Hidden danger, current ammeter box cannot play safe and effective thief-proof electro ultrafiltration.The present inventor wants to add an actuation electromagnetism Lock improves the safety of ammeter box, and existing electromagnetic lock is that lock core and absorption iron plate are separately fixed at chamber door wall or doorframe and case Men Shang, but since the tank wall of ammeter box is than relatively thin, usage time is longer or by after artificial destruction, and easily bending deformation, leads to case Door and tank wall sealing are bad, and electromagnetic lock actuation effect is poor, and not having enhances anti-electricity-theft effect, therefore, is asked for above-mentioned technology Topic, the present invention also provides a kind of electric meter box capable of realizing electricity theft prevention for adding actuation electromagnetic lock, the ammeter box includes babinet, chamber door and leads to Unlock, which is characterized in that further include electromagnetic lock, the electromagnetic lock include the lock body being arranged on the babinet and with the lock body The absorption iron plate being used cooperatively, the absorption iron plate are movably arranged on by draw-off mechanism on the chamber door.
The draw-off mechanism includes the bar shaped fixing groove and be arranged in the fixing groove that one end is closed and cross section is U-shaped Spring, the fixing groove include two side walls, bottom plate and blind end, the spring one end is fixed on the blind end, described The spring other end is connect with the absorption iron plate, and the absorption iron plate is vertically arranged in the fixing groove.
The draw-off mechanism further includes the rolling assembly being arranged in the fixing groove, and the absorption iron plate passes through the rolling Dynamic component is connect with the spring, and the rolling assembly includes a pair of of idler wheel and connects the connecting shaft of the idler wheel, the connection Fixed link is provided on axis, the upper end of the fixed link is provided with cylindrical end tangs, and it is convex that the absorption iron plate is fixed on the cylindricality On platform, the lower face of the cylindrical end tangs is contacted with the upper surface of the side wall, and the spring is connect with the fixed link.
The track being used cooperatively with the idler wheel is additionally provided on the bottom plate.
Chain is further included, one end of the chain is fixed on babinet, and the other end of the chain is fixed on the fixation On bar.
The present invention also provides a kind of safe intensifiers of electric meter box capable of realizing electricity theft prevention, which is characterized in that including electromagnetic lock and The pulling device being used cooperatively with the electromagnetic lock, the electromagnetic lock include lock body and the absorption iron being used cooperatively with the lock body Plate is provided with the absorption iron plate that can be only moved forward and backward along the pulling device in the pulling device;The drawing dress It puts and is fixed on the chamber door of the ammeter box, the lock body is fixed on the tank wall of the ammeter box.
The pulling device includes the bar shaped fixing groove and be arranged in the fixing groove that one end is closed and cross section is U-shaped Spring, the fixing groove include two side walls, bottom plate and blind end, the spring one end is fixed on the blind end, described The spring other end is connect with the absorption iron plate, and the absorption iron plate is vertically arranged in the fixing groove.
The pulling device further includes the rolling assembly being arranged in the fixing groove, and the absorption iron plate passes through the rolling Dynamic component is connect with the spring, and the rolling assembly includes a pair of of idler wheel and connects the connecting shaft of the idler wheel, the connection Fixed link is provided on axis, the upper end of the fixed link is provided with cylindrical end tangs, and it is convex that the absorption iron plate is fixed on the cylindricality On platform, the lower face of the cylindrical end tangs is contacted with the upper surface of the side wall, described in the spring is connect with the fixed link The track being used cooperatively with the idler wheel is additionally provided on bottom plate.
The pulling device further includes chain, and one end of the chain is fixed on babinet, and the other end of the chain is consolidated It is scheduled in the fixed link.
The present invention provides a kind of safe anti-electricity-theft electric energy meter case mechanical locks, make including lock core, with lock core cooperation Sleeve and the contact switch being arranged between the lock core and the sleeve, the lock core are equipped with moving vane and lock Determine block, the lock slots being used cooperatively with the clamping block are provided on the sleeve, the clamping block both ends are set by spring There is movable block, the movable block protrudes the lock core and is located in the lock slots of the sleeve, institute under the action of the spring Two contacts for stating contact switch are separately positioned on the movable block upper surface and the sleeve above the movable block On.
Wherein, the rear end of the sleeve(One end opposite with open keyhole)Disengaging line three-way hole is additionally provided with, two described tactile Point is by passing through being connect with elements such as power supplys for the disengaging line three-way hole connecting line.
The beneficial effects of the invention are as follows:The ammeter box of the present invention is provided with authentication switch, when user's private opening electricity During electricity box, earth leakage protective device starts, and supply line is disconnected, user is avoided to overlap circuit privately, while it is hidden to also eliminate safety Suffer from;In addition, being additionally provided with electromagnetic lock, when user opens ammeter box privately, not only earth leakage protective device starts, and supply line breaks It opens, and the electromagnetic lock in the chamber door of ammeter box can be attracted and close moment, user can not be again turned on, and improve the peace of ammeter box Quan Xing;Wherein, the absorption iron plate of electromagnetic lock is arranged on by a draw-off mechanism on chamber door, and absorption iron plate is in the drive of draw-off mechanism Under be only capable of being moved forward and backward along draw-off mechanism, it is impossible to effect shake, when the door is in a closed position and electromagnetic lock core generate suction when, absorption Iron plate can be good at being attracted with lock core, even if chamber door slightly bends or deforms, still ensure that the actuation of absorption iron plate and lock core Effect, absorption iron plate are limited in draw-off mechanism, the chamber door locking when absorption iron plate and lock core actuation.
Description of the drawings
Fig. 1 is the circuit diagram of the embodiment of the present invention 1 and 2;
Fig. 2 is the structure diagram of infrared remote control switch in Fig. 1;
Fig. 3 is the circuit diagram of the embodiment of the present invention 3 and 6;
Fig. 4 is the structure diagram of the embodiment of the present invention 3,5 and 6;
Fig. 5 is A portions partial enlarged view in Fig. 4;
Fig. 6 is the structure diagram of the embodiment of the present invention 2,4 and 6.
Wherein, reference numeral is:
101st, enabling inductor;102nd, relay A;103rd, authentication switchs;104th, relay B;105th, testing button; 106th, electromagnetic lock;
201st, chamber door;202nd, fixing groove;203rd, lock body;204th, track;205th, upper surface;206th, idler wheel;207th, fixed link; 208th, cylindrical end tangs;209th, iron plate is adsorbed;210th, spring;211st, chain;
301st, open keyhole;302nd, lock core;303rd, movable block;304th, clamping block;305th, contact;306th, sleeve;307th, it locks Slot.
Specific embodiment
The present invention will be described in detail below with reference to the drawings of preferred embodiments, whereby to the present invention how applied technology method To solve technical problem, and the realization process for reaching technique effect can fully understand and implement according to this.
Embodiment 1
Referring to Fig. 1 and Fig. 2, an embodiment of the present invention provides a kind of safe anti-electricity-theft electric energy meter case, including testing button 105, testing button 105 is the leakage tests button of earth leakage protective device being connect with ammeter box metering circuit, wherein, further include body Part authentication switch 103, relay A102, relay B104 and enabling inductor 101;Enabling inductor 101 and relay A102 Coil series connection, the normally opened contact of relay A102, authentication switch the coil relay in series of 103 and relay B104 The driving circuit of device B104, testing button 105 is in parallel with the normally-closed contact of relay B104 to form execution circuit;Authentication is opened Close is usually that closure or authentication are switched as normally closed switch.
Wherein, authentication switch 103 be infrared remote control switch, infrared remote control switch include button, RF transmitter, Infrared receiver and relay C, the normally-closed contact of relay C are connected with the normally opened contact of relay A102, infrared receiver The output terminal of device is connect with the coil of relay C, for relay C to be driven to switch to normally opened contact by normally-closed contact;Wherein, ammeter The material of case is made of hard engineering plastic, such as makrolon, polyformaldehyde, polyamide, thermoplastic's polyester or Noryl Deng or the reception antenna of infrared receiver be arranged on the outside of the ammeter box, infrared signal is avoided to shield.It opens the door and senses Device is correlation optoelectronic switch, and specific internal structure and internal circuit connection relation belong to the prior art, then this is not being repeated.
The course of work is as follows:
A, normal condition:Authentication switch 103 is in closed state, the connection of correlation optoelectronic switch, relay A102 Coil is powered, normally opened contact disconnects, at this point, testing button 105 is failure to actuate, maintains normal function;
B, when non-working person unpacks(When i.e. without authentication):Authentication switch 103 is still closed, when chamber door is opened When, correlation optoelectronic switch disconnects, and relay A102 coil blackouts, normally opened contact connection, relay B104 coils are powered, are normally closed Contact connects, and by 105 short circuit of testing button, earth leakage protective device starts, and supply line stops power supply;After chamber door is closed, to penetrating Optoelectronic switch connects, and the driving circuit power-off of relay B104, the normally-closed contact of relay B104 disconnects, and testing button 105 is extensive It is multiple;
C, when staff unpacks:First by lower button, authentication switch disconnects, and relay B104 coil blackouts are surveyed Examination button 105 is failure to actuate, and is then then turned on mechanical lock.
Embodiment 2
Referring to Fig. 1 and Fig. 6, an embodiment of the present invention provides a kind of safe anti-electricity-theft electric energy meter case, including testing button 105, testing button 105 is the leakage tests button of earth leakage protective device being connect with ammeter box metering circuit, wherein, further include body Part authentication switch 103, relay A102, relay B104 and enabling inductor 101;Enabling inductor 101 and relay A102 Coil series connection, the normally opened contact of relay A102, authentication switch the coil relay in series of 103 and relay B104 The driving circuit of device B104, testing button 105 is in parallel with the normally-closed contact of relay B104 to form execution circuit;
Wherein, difference lies in authentication switch is contact switch, as shown in fig. 6, contact switch is set with embodiment 1 It puts in the lock core for opening up lock of the ammeter box, when opening up lock locking, contact switch is in closed state, when insertion key When rotary locking cylinder is unlocked, contact switch disconnects.
The course of work is as follows:
A, normal condition:Contact switch connection of the authentication switch 103 in closed state, lock core, relay A102 coils are powered, normally opened contact disconnects, at this point, testing button 105 is failure to actuate, maintain normal function;
B, before non-working person unpacks(Before unpacking without authentication):Touching in authentication switch 103 i.e. lock core Point switch is still in closed state, and when unused key opens chamber door, correlation optoelectronic switch disconnects, relay A102 lines Circle power-off, normally opened contact connection, relay B104 coils are powered, normally-closed contact connection, and by 105 short circuit of testing button, electric leakage is protected It protects device to start, supply line stops power supply;After chamber door is closed, contact switch is connected, the driving circuit of relay B104 breaks Electricity, the normally-closed contact of relay B104 disconnect, and testing button 105 restores;
C, when staff unpacks:When key is inserted into lock core and rotates, the contact switch in lock core disconnects, relay B104 coil blackouts, testing button 105 are failure to actuate.
Embodiment 3
On the basis of embodiment 1 and embodiment 2, an electromagnetic lock 106 can be also added, it is specifically square referring to Fig. 3, Fig. 4 and Fig. 5 Case is:A kind of safe anti-electricity-theft electric energy meter case, including testing button 105, testing button 105 is connect with ammeter box metering circuit Earth leakage protective device leakage tests button, wherein, further include authentication switch 103, relay A102, relay B104 and Enabling inductor 101;Enabling inductor 101 is connected with the coil of relay A102, and the normally opened contact of relay A102, identity are recognized The driving circuit of the coil relay B104 in series of 103 and relay B104 of card switch, testing button 105 and relay The normally-closed contact parallel connection of B104 forms execution circuit;Control circuit of the driving circuit of relay A102 also with an electromagnetic lock 106 Connection.
Wherein, authentication switch may be used infrared remote control switch as described in Example 1 or using embodiment 2 Contact switch.Enabling inductor be correlation optoelectronic switch, wherein correlation optoelectronic switch for the prior art again this do not repeating.
Embodiment 4
Referring to Fig. 6, an embodiment of the present invention provides a kind of safe anti-electricity-theft electric energy meter case mechanical lock, including lock core 302, The sleeve 306 being used cooperatively with lock core 302 and the contact switch being arranged between lock core 302 and sleeve 306, on lock core 302 Equipped with moving vane(It is not shown in figure)With clamping block 304, the locking being used cooperatively with clamping block 304 is provided on sleeve 306 Slot 307,304 both ends of clamping block are provided with movable block 303 by spring, and movable block 303 protrudes lock core 302 under the action of the spring And in the lock slots 307 of sleeve 306, two contacts 305 of contact switch are separately positioned on 303 upper surface of movable block and position On sleeve 306 above movable block 303;The rear end of sleeve 306(One end opposite with open keyhole 301)It is additionally provided with inlet-outlet line Through-hole, by passing through being connect with circuits such as power supplys for disengaging line three-way hole connecting line, contact switch is existing skill for two contacts 305 Art is not repeating herein.
When opening up lock locking, under the action of the spring, movable block 303 is abutted with sleeve 306, and two of contact switch touch 305 connection of point, contact switch are in closed state, and when being inserted into the unlocking of key rotary locking cylinder 302, contact switch disconnects.
The mechanical lock that the embodiment of the present invention 4 provides, can be used for above-described embodiment 2, embodiment 3 and the following examples In 5.
Embodiment 5
Referring to Fig. 4 and Fig. 5, an embodiment of the present invention provides a kind of safe intensifier of electric meter box capable of realizing electricity theft prevention, including electricity Magnetic padlock and the pulling device being used cooperatively with electromagnetic lock, electromagnetic lock include lock body 203 and the absorption iron being used cooperatively with lock body 203 Plate 209 is provided with the absorption iron plate 209 that can be only moved forward and backward along pulling device in pulling device;Pulling device is fixed on electricity On the chamber door 201 of electricity box, lock body 203 is fixed on the tank wall of ammeter box;Wherein, electromagnetic lock is lock-opening style electromagnetic lock of swiping the card, Control circuit and power supply circuit etc. belong to the prior art, and details are not described herein.
Wherein, pulling device includes the bar shaped fixing groove 202 and be arranged on fixing groove that one end is closed and cross section is U-shaped Spring 210 in 202, fixing groove 202 include two side walls, bottom plate and blind end, and 210 one end of spring is fixed on blind end, bullet 210 other end of spring is connect with absorption iron plate 209, and absorption iron plate 209 is vertically arranged in fixing groove 202.
Pulling device further includes the rolling assembly being arranged in fixing groove 202, and absorption iron plate 209 passes through rolling assembly and bullet Spring 210 connects, and rolling assembly includes the connecting shaft of a pair of of idler wheel 206 and connection idler wheel 206, and fixed link is provided in connecting shaft 207, the upper end of fixed link 207 is provided with cylindrical end tangs 208, and absorption iron plate 209 is fixed in cylindrical end tangs 208, cylindrical end tangs 208 lower face is contacted with the upper surface 205 of side wall, and spring 210 is connect with fixed link 207;It is additionally provided on bottom plate and idler wheel 206 tracks 204 being used cooperatively;Pulling device further includes chain 211, and one end of chain 211 is fixed on babinet, chain 211 The other end be fixed in fixed link 206.
Above-mentioned pulling device can be mounted on the ammeter box used;During installation, first by spring 201,207 and of fixed link Absorption iron plate 209 etc. is arranged in fixing groove 202, then fixing groove 202 is fixed on chamber door 201, and lock body 203 is consolidated It is scheduled on tank wall.Staff is swiped the card with IC card, and 201 delayed start-up of chamber door simultaneously opens mechanical universal latch, case using common key Door 201 can be opened, and chain 211 is provided between tank wall and chamber door 201, chamber door 201 is avoided to open excessive, adds electromagnetic lock and carry The high safety of ammeter box.During chamber door 201 is closed, under the promotion of spring 210, rolling assembly is along fixing groove 202 slide in and out, and when chamber door 201 is closed, lock body 203 is adsorbed with absorption iron plate 209, is opened up lock and is lockked.
Embodiment 6
Referring to Fig. 3, an embodiment of the present invention provides a kind of safe anti-electricity-theft electric energy meter case, including testing button 105, test Button 105 is the leakage tests button of earth leakage protective device being connect with ammeter box metering circuit, wherein, it further includes authentication and opens Close 103, relay A102, relay B104 and enabling inductor 101;The coil string of enabling inductor 101 and relay A102 Connection, the normally opened contact of relay A102, authentication switch the coil relay B104's in series of 103 and relay B104 Driving circuit, testing button 105 is in parallel with the normally-closed contact of relay B104 to form execution circuit;The driving electricity of relay A102 Control circuit of the road also with an electromagnetic lock 106 is connect.
Wherein, infrared remote control switch described in embodiment 1 or touching using embodiment 2 may be used in authentication switch Point switch, as shown in Figure 6.Enabling inductor be correlation optoelectronic switch, wherein correlation optoelectronic switch for the prior art again this It is not repeating.Wherein, the electromagnetic lock 106 is additionally provided with a kind of stand-by power supply, and the stand-by power supply is the prior art, then this does not exist It repeats.
Safe anti-electricity-theft electric energy meter case further includes safe intensifier, and as shown in Figure 4 and Figure 5, safe intensifier includes Electromagnetic lock and the pulling device being used cooperatively with electromagnetic lock, electromagnetic lock include lock body 203 and the absorption being used cooperatively with lock body 203 Iron plate 209 is provided with the absorption iron plate 209 that can be only moved forward and backward along pulling device in pulling device;Pulling device is fixed on On the chamber door 201 of ammeter box, lock body 203 is fixed on the tank wall of ammeter box;Wherein, electromagnetic lock is lock-opening style electromagnetic lock of swiping the card, Its control circuit and power supply circuit etc. belong to the prior art, and details are not described herein.
Wherein, pulling device includes the bar shaped fixing groove 202 and be arranged on fixing groove that one end is closed and cross section is U-shaped Spring 210 in 201, fixing groove 201 include two side walls, bottom plate and blind end, and 210 one end of spring is fixed on blind end, bullet 210 other end of spring is connect with absorption iron plate 209, and absorption iron plate 209 is vertically arranged in fixing groove 201.
Pulling device further includes the rolling assembly being arranged in fixing groove 201, and absorption iron plate 209 passes through rolling assembly and bullet Spring 210 connects, and rolling assembly includes the connecting shaft of a pair of of idler wheel 206 and connection idler wheel 206, and fixed link is provided in connecting shaft 207, the upper end of fixed link 207 is provided with cylindrical end tangs 208, and absorption iron plate 209 is fixed in cylindrical end tangs 208, cylindrical end tangs 208 lower face is contacted with the upper surface 205 of side wall, and spring 210 is connect with fixed link 207;It is additionally provided on bottom plate and idler wheel 206 tracks 204 being used cooperatively;Pulling device further includes chain 211, and one end of chain 211 is fixed on babinet, chain 211 The other end be fixed in fixed link 207.
The course of work is as follows:
A, normal condition:Authentication switch 103 is in closed state, 103 connection of authentication switch, relay A102 Coil is powered, normally opened contact disconnects, at this point, electromagnetic lock 106 does not work, testing button 105 is failure to actuate, and maintains normal function;
B, before non-working person unpacks(Before unpacking without authentication):Authentication switch 103(I.e. in lock core 302 Contact switch or infrared remote control switch)Still in closed state, when non-working person is being not turned off authentication switch 103 In the case of when chamber door 201 is opened, correlation optoelectronic switch disconnects, relay A102 coil blackouts, normally opened contact connection, after Electric appliance B104 coils are powered, normally-closed contact connection, and by 105 short circuit of testing button, earth leakage protective device starts, and supply line stops at this time It only powers, stand-by power supply is powered for electromagnetic lock 106, and 106 moment of electromagnetic lock generates adsorption capacity and adsorbed iron plate 209 is adsorbed, chamber door 201 close under the drive of absorption iron plate 209, and mechanical lock is lockked again, the connection of correlation optoelectronic switch, relay B104's Driving circuit powers off, and 106 magnetic force of electromagnetic lock disappears, and testing button 105 restores, but earth leakage protective device is still in work shape body;
C, when staff unpacks:First by lower button, authentication switch disconnects, and relay B104 coil blackouts are surveyed Examination button 105 is failure to actuate, and is then then turned on mechanical lock, chamber door 201 is normally-open;Or when key is inserted into lock core 302 and rotates, Contact switch in lock core 302 disconnects, and relay B104 coil blackouts, testing button 105 is failure to actuate, and chamber door 201 is normally-open.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all the present invention spirit and Within principle, any modification, equivalent replacement, improvement and so on should all be included in the protection scope of the present invention.

Claims (4)

1. a kind of ammeter with anti electricity-theft function case, including testing button, the testing button is to connect with the ammeter box metering circuit The leakage tests button of the earth leakage protective device connect, which is characterized in that further include authentication switch, relay A, relay B and Enabling inductor;The enabling inductor is connected with the coil of the relay A, and the normally opened contact of the relay A, identity are recognized The driving circuit of the coil relay B in series of card switch and the relay B, the testing button and the relay The normally-closed contact parallel connection of device B forms execution circuit;
Control circuit of the driving circuit of the relay A also with an electromagnetic lock is connect;
The enabling inductor is correlation optoelectronic switch;
The ammeter box includes babinet, chamber door and opens up lock, further includes electromagnetic lock, and the electromagnetic lock includes being arranged on the babinet On lock body and the absorption iron plate that is used cooperatively with the lock body, the absorption iron plate be movably arranged on by draw-off mechanism described On chamber door.
2. ammeter with anti electricity-theft function case according to claim 1, which is characterized in that the authentication switch is infrared distant Control switch, the infrared remote control switch include button, RF transmitter, infrared receiver and relay C, the relay The normally-closed contact of C is connected with the normally opened contact of the relay A, the output terminal of the infrared receiver and the relay C Coil connection, for the relay C to be driven to switch to normally opened contact by normally-closed contact.
3. ammeter with anti electricity-theft function case according to claim 1, which is characterized in that the draw-off mechanism is closed including one end And the U-shaped bar shaped fixing groove in cross section and the spring being arranged in the fixing groove, the fixing groove include two side walls, bottom Plate and blind end, the spring one end are fixed on the blind end, and the spring other end is connect with the absorption iron plate, described Absorption iron plate is vertically arranged in the fixing groove.
4. ammeter with anti electricity-theft function case according to claim 3, which is characterized in that the draw-off mechanism, which further includes, to be arranged on Rolling assembly in the fixing groove, the absorption iron plate are connect by the rolling assembly with the spring, the rolling group Part includes a pair of of idler wheel and connects the connecting shaft of the idler wheel, is provided with fixed link in the connecting shaft, the fixed link it is upper End is provided with cylindrical end tangs, and the absorption iron plate is fixed in the cylindrical end tangs, the lower face of the cylindrical end tangs with it is described The upper surface contact of side wall, the spring are connect with the fixed link.
CN201510653529.8A 2015-10-10 2015-10-10 A kind of safe anti-electricity-theft electric energy meter case Expired - Fee Related CN105301309B (en)

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