Anti-stealing device for electric meter

Abstract

The present application relates to the field of preventing electricity stealing tools, and particularly relates to an anti-electricity stealing device of an electric meter, comprising a first screw, a second screw, a limiting mechanism and an alarm; different numbers of turns of the first screw and the second screw are twisted in sequence to protect the electric meter; if a user steals electricity, the first screw or the second screw is twisted in a conventional way, and the second telescopic rod or the first telescopic rod limits the second screw rod or the first screw rod, so that the second screw rod or the first screw rod cannot rotate any more, the electric meter shell and the cover cannot be opened, the second conductive block and the group of contact heads are attached, the alarm is powered on to start alarming, the wireless signal transmitter sends the alarm information to the power supply company, and loss caused by electricity stealing to the electric power industry is avoided.

Description

Technical Field

[0001] This invention relates to the field of tools for preventing electricity theft, and more particularly to an anti-theft device for an electricity meter. Background Technology

[0002] Electricity meters are instruments used to measure electrical energy. To prevent damage to the electricity meter during use and to improve safety, a protective casing is usually installed on the meter. However, conventional protective casings do not have the function of preventing electricity theft. The aforementioned protective casings leave hidden dangers for electricity theft. Electricity thieves can easily use various means to steal electricity, and the theft is highly concealed and difficult to detect and punish. Summary of the Invention

[0003] The purpose of this invention is to provide an anti-theft device for electricity meters to address the deficiencies mentioned in the background art.

[0004] An anti-theft device for an electricity meter includes: a first screw, a second screw, a limit mechanism, and an alarm.

[0005] The first screw and the second screw respectively engage with two nuts inside the meter casing;

[0006] The first screw includes: a screw rod 1, a groove portion 1, a limiting screw rod 1, a limiting screw rod 2, and a fixing nut 1. The screw rod 1 has a torsion groove 1 vertically downward along its top surface. There are two groove portions 1, and each groove portion 1 is an annular groove. The limiting screw rod 1 and the limiting screw rod 2 have slots horizontally formed along one side of their vertical wall. The upper and lower ends of the limiting screw rod 1 are respectively provided with groove portions 1. The upper groove portion 1 of the limiting screw rod 1 is connected to the lower end of the screw rod. The lower groove portion 1 of the limiting screw rod 2 is connected to the upper end of the limiting screw rod 2. The fixing nut 1 engages with the upper end of the screw rod 1. The upper end of the fixing nut 1 is provided with a groove. The shape of the groove on the upper end of the fixing nut 1 is the same as the shape of the groove on the nut of the one-way screw.

[0007] The second screw includes: screw rod 2, groove part 2, limiting screw rod 3, limiting screw rod 4, and fixing nut 2. The structure of screw rod 2 and groove part 2 is the same as that of screw rod 1 and groove part 1. The upper end of screw rod 2 is provided with a torsion groove 2. There are two groove parts 2. The limiting screw rod 3 and limiting screw rod 4 24 are horizontally provided with slots along one side of the vertical wall. The lengths of limiting screw rod 1, limiting screw rod 2, limiting screw rod 3, and limiting screw rod 4 are different. The upper and lower ends of limiting screw rod 4 are respectively provided with groove part 2. The upper groove part 2 of limiting screw rod 4 is connected to the lower end of limiting screw rod 3. The upper end of limiting screw rod 3 is connected to the lower end of screw rod 2. The fixing nut 2 has the same structure as fixing nut 1.

[0008] The limiting mechanism is located between the first screw and the second screw. The limiting mechanism includes: an assembly plate, a shaft, a telescopic mechanism one, a telescopic mechanism two, and a contact. The shaft is located on the vertical wall of the meter casing. The assembly plate is coaxially connected to the shaft. Telescopic mechanism one and telescopic mechanism two are respectively located on both sides of the assembly plate. Telescopic mechanism one and telescopic mechanism two have the same structure. Telescopic mechanism one includes: a housing one, a telescopic rod one, a spring one, a counterweight one, and a transmission head one. One end of the housing one is fixed to the assembly plate. The upper and lower surfaces of the housing one are respectively provided with sliding grooves. One end of the telescopic rod one extends into the housing one. The other end of the telescopic rod one is provided with a transmission head. The counterweight one is nested in the housing one. A spring one is provided between the counterweight one and the telescopic rod one. The stress of the spring one is less than the weight of the counterweight one.

[0009] Preferably, the first telescopic mechanism and the second telescopic mechanism are respectively provided with contacts, and the number of contacts is four. The four contacts are arranged in pairs. A conductive block is provided at one end of the first telescopic rod located in the first housing. The two sets of contacts are connected to the meter and the alarm respectively through the circuit. The alarm is located inside the meter housing.

[0010] Preferably, the meter casing is also equipped with a wireless signal transmitter.

[0011] Preferably, the lower ends of screw 1 and screw 2 may be provided with multiple limiting screw 1, limiting screw 2, limiting screw 3, limiting screw 4, and connected groove 1 and groove 2, the purpose of which is to increase the number of times screw 11 and screw 2 are alternately twisted, i.e., the corresponding number of turns.

[0012] Preferably, the two mounting holes of the cover are marked with labels.

[0013] Beneficial effects of this invention:

[0014] This invention protects the meter by sequentially turning the first screw and the second screw a different number of turns. If a user attempts to steal electricity, turning the first or second screw in a conventional manner limits the movement of the second or a pair of telescopic rods, preventing the second or a single screw from rotating. This prevents the meter casing and cover from opening. Simultaneously, the second conductive block engages with a set of contacts, activating the alarm. The wireless transmitter then sends the alarm information to the power company, preventing losses to the power industry caused by electricity theft. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of one side of the structure of the present invention.

[0016] Figure 2 This is a top view of the structure of the present invention.

[0017] Figure 3 This is a schematic diagram of the screw structure of the present invention.

[0018] Figure 4 This is a schematic diagram of a partial structure of the screw of the present invention.

[0019] Figure 5 This is a top view of the screw structure of the present invention.

[0020] Figure 6 This is a schematic diagram of the limiting mechanism structure of the present invention.

[0021] Figure 7 This is a partial structural diagram of the limiting mechanism of the present invention.

[0022] Figure 8 This is a schematic diagram of the initial state of the limiting mechanism of the present invention.

[0023] Figure 9 This is a schematic diagram of the torsion screw of the present invention.

[0024] Figure 10 This is a schematic diagram of the movement of the counterweight block in this invention.

[0025] Figure 11 This is a diagram illustrating the incorrect twisting of the screw in this invention. Figure 1 .

[0026] Figure 12 This is a diagram illustrating the incorrect twisting of the screw in this invention. Figure 2 .

[0027] Figure 13 This is a schematic diagram of the meter cover structure of the present invention. Detailed Implementation

[0028] Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will make these embodiments readily achievable by those skilled in the art. However, the present invention can be implemented in various different forms, and therefore the present invention is not limited to the embodiments described below. In addition, for the sake of clearer description of the present invention, components not connected to the invention will be omitted from the drawings.

[0029] like Figure 1-2 As shown, an anti-theft device for an electricity meter includes: a first screw 1, a second screw 2, a limiting mechanism 3, and an alarm 4.

[0030] Two nuts 51 are provided on one side inside the meter casing 5, and there is a certain distance between the two nuts 51;

[0031] The first screw 1 and the second screw 2 respectively engage with the two nuts 51, thereby connecting the meter housing 5 and the meter cover 6;

[0032] like Figure 3-4 As shown, the first screw 1 includes: a screw rod 11, a groove 12, a limiting screw rod 13, a limiting screw rod 2 14, and a fixing nut 15. The screw rod 11 has a torsion groove 111 vertically downward along its top surface. There are two grooves 12, each groove 12 being annular and having a semi-circular cross-section at one end. The limiting screw rod 13 and the limiting screw rod 2 14 have slots horizontally formed along one side of a vertical wall. The upper and lower ends of the limiting screw rod 13 are respectively provided with grooves 111. 12. The upper groove portion 12 of the limiting screw 13 is connected to the lower end of the screw 11, and the lower groove portion 12 of the limiting screw 13 is connected to the upper end of the limiting screw 14. The screw 11, the groove portion 12, the limiting screw 13, and the limiting screw 14 have the same diameter and their axes are all on the same straight line. The fixing nut 15 is engaged with the upper end of the screw 11. The upper end of the fixing nut 15 is provided with a groove, and the shape of the groove at the upper end of the fixing nut 15 is the same as the shape of the groove on the nut of the one-way screw.

[0033] The second screw 2 includes: a second screw 21, a second groove 22, a third limiting screw 23, a fourth limiting screw 24, and a second fixing nut 25. The structure of the second screw 21 is the same as that of the first screw 11. The upper end of the second screw 21 has a torsion groove 211. There are two second grooves 22, and the structure of the second groove 22 is the same as that of the first groove 12. The third limiting screw 23 and the fourth limiting screw 24 have slots horizontally formed along one side of the vertical wall. The lengths of the first limiting screw 13, the second limiting screw 14, the third limiting screw 23, and the fourth limiting screw 24 are all different. The upper and lower ends of the fourth limiting screw 24 are respectively provided with second grooves 22. The upper end of the fourth limiting screw 24 has a second groove 22. The lower end of the second limiting screw 22 is connected to the lower end of the third limiting screw 23. The upper end of the third limiting screw 23 is connected to the lower end of the second screw 21. The second screw 21, the second groove 22, the third limiting screw 23, and the fourth limiting screw 24 have the same diameter and their axes are all on the same straight line. The second fixing nut 25 has the same structure as the first fixing nut 15. The second fixing nut 25 is engaged with the upper end of the second screw 21. Through the engagement of the first fixing nut 15, the second fixing nut 25 with the first screw 11 and the second screw 21, the meter housing 5 and the meter cover 6 are connected. After the first fixing nut 15 and the second fixing nut 25 fix the meter cover 6, the groove at the upper end of the first fixing nut 15 and the second fixing nut 25 is located above the first screw 11 and the second screw 21.

[0034] The limiting mechanism 3 is disposed between the first screw 1 and the second screw 2, such as Figure 6As shown, the limiting mechanism 3 includes: an assembly plate 31, a shaft 32, a telescopic mechanism 1 33, a telescopic mechanism 2 34, and a contact 35. The shaft 32 is set on the vertical wall of the meter housing 5. The assembly plate 31 is coaxially connected to the shaft 32. The two sides of the assembly plate 31 are respectively provided with a telescopic mechanism 1 33 and a telescopic mechanism 2 34. The telescopic mechanism 1 33 and the telescopic mechanism 2 34 correspond to the first screw 1 and the second screw 2, respectively.

[0035] like Figure 7 As shown, the telescopic mechanism 33 includes: a housing 331, a telescopic rod 332, a spring 333, a counterweight 334, and a transmission head 335. One end of the housing 331 is fixed to the mounting plate 31. The housing 331 has sliding grooves on its upper and lower surfaces. One end of the telescopic rod 332 extends into the housing 331, and the other end faces the first screw 1. A conductive block 332-1 is provided at one end of the telescopic rod 332 located within the housing 331. The housing 331 extends out of the upper and lower sliding grooves of the housing 331. The telescopic rod 332 is provided with a transmission head 335 at one end facing the first screw 1. The transmission head 335 can engage in the groove portion 12. The counterweight 334 is nested in the housing 331. A spring 333 is provided between the counterweight 334 and the telescopic rod 332. The stress of the spring 333 is less than the weight of the counterweight 334. The stress of the spring 333 causes the telescopic rod 332 to abut against the screw 11 through the transmission head 335.

[0036] The telescopic mechanism 2 34 has the same structure as the telescopic mechanism 1 33. The telescopic mechanism 2 34 includes: housing 2 341, telescopic rod 2 342, spring 2 343, counterweight 2 344, and transmission head 2 345. The telescopic rod 2 342 is provided with conductive block 2 342-1. The stress of the spring 2 343 causes the telescopic rod 2 342 to abut against the screw 2 21 through the transmission head 2 345.

[0037] There are four contacts 35, and the four contacts 35 are in pairs. One pair of contacts 35 is installed on the upper and lower surfaces of the housing 1 331 facing the first screw 1, and the other pair of contacts 35 is installed on the upper and lower surfaces of the housing 2 341 facing the second screw 2. Since the transmission head 1 335 and the transmission head 2 345 abut against the screw 1 11 and the screw 2 21 respectively, there is a certain distance between the conductive block 1 332-1, the conductive block 2 342-1 and the two pairs of contacts 35.

[0038] The two sets of contacts 35 are respectively connected to the electricity meter and the alarm 4 through the circuit. The alarm 4 is installed inside the electricity meter housing 5. The electricity meter housing 5 is also equipped with a wireless signal transmitter (not shown in the figure).

[0039] During installation, firstly, rotate screw 11 and screw 21 into the two nuts 51 and tighten screw 11 and screw 21. Then, adjust telescopic mechanism 1 33 and telescopic mechanism 2 34 to a horizontal position. Figure 8 As shown, the transmission head 335 abuts against the groove 12 at the upper end of the limiting screw 13 and engages with it, and the transmission head 345 abuts against the upper end of the limiting screw 23. At this time, the transmission head 335, the transmission head 345 and the slots of the limiting screw 13, the limiting screw 24, the limiting screw 33 and the limiting screw 4 form a 90-degree angle. After closing the watch cover 6, the fixing nut 15 and the fixing nut 25 are screwed onto the screw 11 and the screw 21 respectively, and the watch cover 6 is fixed by the fixing nut 15 and the fixing nut 25.

[0040] like Figure 13 As shown, there are markings 61 next to the two mounting holes of the cover 6. The markings 61 are aligned with the torsion grooves 111 and 211 on the upper end of the screw 11 and screw 21 to determine the number of rotations of the screw 11 and screw 21.

[0041] Invention working principle:

[0042] When it is necessary to open the watch cover 6, use a flathead screwdriver of the same size as the twist groove 111 and twist groove 211 to twist screws 111 and 211. The specific steps are as follows: Figure 9 As shown in ABCD, Figure 9 As shown in Figure A, firstly, screw 11 is twisted. When screw 11 rises, the transmission head 335 engages in the groove 12, causing the telescopic mechanism 33 and the telescopic mechanism 34 to rotate clockwise along the axis of the mounting plate 31. After screw 11 is twisted a certain number of times, the transmission head 345 engages in the groove 12 at the upper end of the limiting screw 24. Figure 9 B, such as Figure 10 As shown, when screw 21 is twisted, counterweight 344 and counterweight 334 tilt downwards due to gravity. Counterweight 344 approaches spring 343, further compressing spring 343 and strengthening the contact strength between transmission head 345 and groove 22. Counterweight 334 moves away from spring 333, reducing the contact strength between transmission head 335 and groove 12. Thus, transmission head 335 separates from groove 12 at the upper end of limit screw 13. Telescopic mechanism 1 33 and telescopic mechanism 2 34 rotate counter-clockwise along the axis of assembly plate 31. After screw 21 is twisted a certain number of times, transmission head 335 engages into groove 12 at the lower end of limit screw 13. Figure 9As shown in C, after twisting screw 11 a certain number of turns, telescopic mechanisms 33 and 34 rotate clockwise along the axis of assembly plate 31, and transmission head 345 engages into the groove 12 at the lower end of limit screw 24. Figure 9 As shown in D, after twisting screw 21 a certain number of times, telescopic mechanism 33 and telescopic mechanism 34 rotate counterclockwise along the axis of assembly plate 31. Transmission head 335 moves to the lower end of limit screw 14 and directly unscrews screw 21 and screw 11. Since the lengths of limit screw 13, limit screw 24, limit screw 33, and limit screw 44 are different, the number of turns of screw 11 and screw 21 will be different each time. That is, the number of turns of screw 11 and screw 21 can be known to open the cover 6.

[0043] If electricity theft is committed, directly turning screw 21 or screw 11 without meeting the specified number of turns, such as... Figure 11-12 As shown, the spring 2 343 pushes the telescopic rod 2 342 into the slot of the limiting screw 3 23, so that the screw 2 21 can no longer rotate, and the meter case 5 and meter cover 6 cannot be opened. At the same time, the conductive block 2 342-1 is in contact with a set of contacts 35, the alarm 5 is powered on and starts to alarm, the wireless signal transmitter sends the alarm information to the power company, and the telescopic rod 2 342 is inserted into the limiting screw 3 23. Even if electricity is stolen during power outages or power failures, when power is restored, the alarm 4 will sound and the wireless signal transmitter will send the alarm information to the power company.

Claims

1. An anti-theft device for an electricity meter, comprising: The first screw (1), the second screw (2), the limiting mechanism (3), and the alarm (4) are respectively engaged with two nuts (51) inside the meter casing (5). The first screw (1) includes: a screw rod (11), a groove (12), a limiting screw rod (13), a limiting screw rod (2) (14), and a fixing nut (15). The upper end of the screw rod (11) is provided with a torsion groove (111). There are two grooves (12). The grooves (12) are annular grooves. The limiting screw rod (13) and the limiting screw rod (2) (14) are horizontally provided with inserts along one side of the vertical wall. The upper and lower ends of the limiting screw one (13) are respectively provided with groove part one (12). The groove part one (12) at the upper end of the limiting screw one (13) is connected to the lower end of the screw one (11). The groove part one (12) at the lower end of the limiting screw one (13) is connected to the upper end of the limiting screw two (14). The screw one (11), the groove part one (12), the limiting screw one (13), and the limiting screw two (14) have the same diameter and their axes are all on the same straight line. The fixing nut one (15) is engaged with the upper end of the screw one (11). The upper end of the fixing nut one (15) is provided with a groove. The shape of the groove at the upper end of the fixing nut one (15) is the same as the shape of the groove on the nut of the one-way screw. The second screw (2) includes: screw rod two (21), groove part two (22), limiting screw rod three (23), limiting screw rod four (24), and fixing nut two (25). The structure of screw rod two (21) and groove part two (22) is the same as that of screw rod one (11) and groove part one (12). The upper end of screw rod two (21) is provided with torsion groove two (211). There are two groove parts two (22). The limiting screw rod three (23) and limiting screw rod four (24) are horizontally opened along one side of the vertical wall. The limit screw four (24) has a slot, and the upper and lower ends of the limit screw four (24) are respectively provided with groove two (22). The groove two (22) at the upper end of the limit screw four (24) is connected to the lower end of the limit screw three (23). The upper end of the limit screw three (23) is connected to the lower end of the screw two (21). The screw two (21), the groove two (22), the limit screw three (23), and the limit screw four (24) have the same diameter and their axes are all on the same straight line. The fixing nut two (25) has the same structure as the fixing nut one (15). The limiting mechanism (3) is located between the first screw (1) and the second screw (2). The limiting mechanism (3) includes: an assembly plate (31), a shaft (32), a telescopic mechanism one (33), a telescopic mechanism two (34), and a contact point (35). The shaft (32) is located on the vertical wall of the meter casing (5). The assembly plate (31) is coaxially connected to the shaft (32). The two sides of the assembly plate (31) are respectively provided with a telescopic mechanism one (33) and a telescopic mechanism two (34). The telescopic mechanism one (33) and the telescopic mechanism two (34) have the same structure. The telescopic mechanism one (33) includes: a housing one (331) and a telescopic rod one. (332), spring one (333), counterweight one (334), transmission head one (335), one end of the housing one (331) is fixed to the assembly plate (31), the housing one (331) has sliding grooves on the upper and lower surfaces respectively, one end of the telescopic rod one (332) extends into the housing one (331), the other end of the telescopic rod one (332) is provided with transmission head one (335), the counterweight one (334) is nested in the housing one (331), the spring one (333) is provided between the counterweight one (334) and the telescopic rod one (332), the stress of the spring one (333) is less than the weight of the counterweight one (334); The initial telescopic mechanism 1 (33) and telescopic mechanism 2 (34) are horizontal. The transmission head 1 (335) engages with the groove part 1 (12), and the transmission head 2 (345) on the telescopic mechanism 2 (34) abuts against the upper end of the limiting screw 3 (23).

2. The anti-theft device for an electricity meter according to claim 1, characterized in that: The telescopic mechanism one (33) and the telescopic mechanism two (34) are respectively provided with contact points (35). There are four contact points (35), and the four contact points (35) are in pairs. The telescopic rod one (332) is provided with a conductive block one (332-1) at one end of the housing one (3) (31). The two sets of contact points (35) are respectively connected to the meter and the alarm (4) through the circuit. The alarm (4) is located inside the meter housing (5).

3. The anti-theft device for an electricity meter according to claim 1, characterized in that: The meter casing (5) is also equipped with a wireless signal transmitter.

4. The anti-theft device for an electricity meter according to claim 1, characterized in that: The lower ends of the screw one (11) and screw two (21) may be provided with multiple limiting screws one (13), two limiting screws two (14), three limiting screws three (23), four limiting screws four (24), and connected grooves one (12) and two grooves two (2), the purpose of which is to increase the number of times the screw one (11) and screw two (21) are alternately twisted, that is, the corresponding number of turns.

5. The anti-theft device for an electricity meter according to claim 1, characterized in that, The lengths of the limiting screws 1 (13), 2 (14), 3 (23), and 4 (24) are different.

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