Non-contact ac voltage measuring instrument

Abstract

The utility model discloses a kind of non-contact ac voltage measuring instruments, belong to electric wire voltage measuring device technical field, including host shell, the surface of the host shell is provided with display screen and button, the host shell is provided with the electric control board electrically connected with display screen and button in, the surface of the host shell is provided with a plurality of detection lines, the one end of detection line is electrically connected with the electric control board in the host shell, the other end of detection line is electrically connected with clamp type voltage sensor, the side of the host shell is fixedly installed with two fixed blocks one;By setting protective cover cooperation fixed block one, rotating plate and fixed block two use, so that protective cover can be rotated and closed, after unfolding, adhere to the back of host shell, adhere to the front of host shell after closing, and cooperate lock seat and lock plate and positioning plate and lock, can realize the effective isolation protection of display screen and button on host shell, avoid false touch false operation phenomenon when not using, improve use effect stability.

Description

Technical Field

[0001] This utility model belongs to the technical field of wire voltage measuring devices, specifically relating to a non-contact AC voltage measuring instrument. Background Technology

[0002] As modern industry, construction, and energy sectors become increasingly reliant on power systems, the requirements for their safety and reliability are also rising. Traditional phase sequence detection methods require direct contact with live lines or equipment, sometimes even requiring the removal of the wire insulation, and then connecting the leads of the three phase voltages to a measuring instrument to observe the display results to measure the phase sequence of the three-phase circuit. While this method is effective, it not only increases operational risks but may also lead to equipment damage or personal injury. Therefore, with technological advancements, non-contact AC voltage measuring instruments have emerged, which can directly measure voltage using clamp-on voltage sensors.

[0003] Existing non-contact AC voltage measuring instruments have externally mounted displays and buttons, which lack effective safety protection mechanisms when not in use, making them susceptible to accidental contact and misoperation. Therefore, we propose a non-contact AC voltage measuring instrument. Utility Model Content

[0004] The purpose of this invention is to provide a non-contact AC voltage measuring instrument to solve the problem mentioned in the background art that the display screen and buttons on the surface of existing non-contact AC voltage measuring instruments are externally mounted, and therefore lack an effective safety protection and isolation mechanism when not in use, making them easy to be accidentally touched or misoperated.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a non-contact AC voltage measuring instrument, comprising a main housing, a display screen and buttons on the surface of the main housing, an electronic control board electrically connected to the display screen and buttons inside the main housing, a plurality of detection lines passing through the surface of the main housing, one end of each detection line being electrically connected to the electronic control board inside the main housing, and the other end of each detection line being electrically connected to a clamp-type voltage sensor, two fixing blocks I fixedly mounted on the side of the main housing, a rotating plate rotatably mounted between the two fixing blocks I, fixing blocks II rotatably mounted on both the upper and lower surfaces of the rotating plate, and two fixing blocks II fixedly mounted on the sides of the two fixing blocks II. The same protective cover is used to protect the display screen and buttons on the surface of the main unit casing. A lock seat is fixedly installed on the side of the main unit casing. Lock grooves are opened on both opposite sides of the lock seat. A lock plate is fixedly installed on the side of the protective cover and is engaged in the lock groove. Two sliding grooves are opened on the lower surface of the protective cover, and sliding rods are slidably installed in the sliding grooves. The bottom ends of the two sliding rods are fixedly installed with the same handrail. The surface of the sliding rod has two annular slots, one above the other. Two rotating shafts are rotatably installed on the lower surface of the protective cover. A locking plate is fixedly installed on the outer surface of the rotating shaft. The locking plate has a locking slot that cooperates with the annular slot.

[0006] The above solution, by using a protective cover in conjunction with fixing block one, rotating plate and fixing block two, allows the protective cover to rotate and open and close. When opened, it fits against the back of the main unit housing; when closed, it fits against the front of the main unit housing. It is locked in conjunction with the lock seat, lock plate and positioning plate, which can effectively isolate and protect the display screen and buttons on the main unit housing, preventing accidental touches and misoperations when not in use, and improving the stability of use. By using a handrail in conjunction with a sliding rod, the handrail can slide up and down, making it easy to pull out and put away. The position is locked by a locking plate. The structure is simple and easy to use.

[0007] In a preferred embodiment, grooves are provided on both the upper and lower surfaces of the lock plate, and a positioning plate is movably disposed in the grooves. An operating handle is fixedly installed on the side of the positioning plate, and a channel for the operating handle to move is provided on the side of the lock plate. Positioning grooves for the positioning plate to be engaged are provided on both the upper and lower surfaces of the lock seat.

[0008] Using the above method, after the lock plate is inserted into the lock groove, the positioning plate is inserted into the positioning groove to lock the lock plate, thereby locking the protective cover.

[0009] In a preferred embodiment, a spring and a telescopic rod are fixedly installed on the inner wall of the groove on the locking plate, and both the spring and the telescopic rod are fixedly connected to the positioning plate.

[0010] Using the above scheme, the elastic force of spring one can make the positioning plate move quickly and insert into the positioning groove, and the telescopic rod can support the movement of the positioning plate, so that the positioning plate has good stability when moving and is not prone to shaking.

[0011] In a preferred embodiment, a limiting strip is fixedly installed on the outer surface of the top end of the sliding rod, and a limiting groove is formed on the inner wall of the sliding groove, with the limiting strip slidably installed on the inner wall of the limiting groove.

[0012] By adopting the above solution, the sliding of the limiting strip within the limiting groove can ensure the stable sliding of the sliding rod and prevent the sliding rod from detaching from the sliding groove during sliding, thus achieving a good limiting effect.

[0013] In a preferred embodiment, a retaining rod is slidably mounted on the card plate, a pull plate is fixedly mounted at the bottom end of the retaining rod, and a retaining groove for inserting the retaining rod is provided on the lower surface of the protective cover.

[0014] By using the above solution, the retaining rod and retaining groove can be used to lock the position of the plate and prevent accidental rotation and opening.

[0015] In a preferred embodiment, the card plate has an opening at the position opposite the retaining rod, a limiting ring is fixedly installed on the outer surface of the retaining rod, the limiting ring is located inside the opening, and a spring is fixedly installed between the limiting ring and the inner wall of the opening.

[0016] Using the above solution, the limiting ring is used in conjunction with spring two. The elastic force of spring two can drive the retaining rod to be quickly inserted into the retaining groove, improving the convenience of the fixing operation. The setting of the limiting ring can play a limiting role, preventing the retaining rod from slipping out of the clamp plate.

[0017] Compared with the prior art, the beneficial effects of this utility model are: This non-contact AC voltage measuring instrument uses a protective cover in conjunction with a fixing block one, a rotating plate, and a fixing block two. This allows the protective cover to be rotated open and closed. When opened, it fits against the back of the main unit housing, and when closed, it fits against the front of the main unit housing. It is locked in conjunction with a lock seat, a lock plate, and a positioning plate. This effectively isolates and protects the display screen and buttons on the main unit housing, preventing accidental touches and misoperations when not in use, and improving the stability of the performance. This non-contact AC voltage measuring instrument uses a handrail in conjunction with a sliding rod. The handrail can slide up and down for easy pulling out and retraction, and a locking plate is used for position locking. It has a simple structure and is easy to use. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a structural schematic diagram of the present invention from another angle; Figure 3 This is a schematic diagram of the unfolded protective cover of this utility model; Figure 4 This is a schematic diagram of the structure of the lock base and lock plate of this utility model; Figure 5 This is a schematic diagram of the cross-section of the locking plate of this utility model; Figure 6 This is a structural schematic diagram of the cross-section of the protective cover of this utility model; Figure 7 This is a schematic diagram of the sliding rod and handrail of this utility model; Figure 8 This is a schematic diagram of the structure of the card plate of this utility model.

[0019] In the diagram: 1. Main unit housing; 2. Detection line; 3. Clamp-type voltage sensor; 4. Fixing block one; 5. Rotating plate; 6. Fixing block two; 7. Protective cover; 8. Lock seat; 9. Locking plate; 10. Sliding rod; 11. Handrail; 12. Rotating shaft; 13. Clamping plate; 14. Positioning plate; 15. Operating handle; 16. Spring one; 17. Telescopic rod; 18. Limiting strip; 19. Fixing rod; 20. Pull plate; 21. Limiting ring; 22. Spring two. Detailed Implementation

[0020] Please see Figure 1-8 This utility model provides a non-contact AC voltage measuring instrument, including a main housing 1. The surface of the main housing 1 is provided with a display screen and buttons. An electronic control board electrically connected to the display screen and buttons is disposed inside the main housing 1. Several detection lines 2 are threaded through the surface of the main housing 1. One end of each detection line 2 is electrically connected to the electronic control board inside the main housing 1, and the other end of each detection line 2 is electrically connected to a clamp-type voltage sensor 3. Two fixing blocks 4 are fixedly installed on the side of the main housing 1. A rotating plate 5 is rotatably installed between the two fixing blocks 4. Fixing blocks 6 are rotatably installed on both the upper and lower surfaces of the rotating plate 5. The same protective cover 7 is fixedly installed on the sides of the two fixing blocks 6. Cover 7 is used to protect the display screen and buttons on the surface of the main unit housing 1. A lock seat 8 is fixedly installed on the side of the main unit housing 1. Lock slots are opened on both opposite sides of the lock seat 8. A lock plate 9 is fixedly installed on the side of the protective cover 7 and is locked in the lock slot. Two sliding grooves are opened on the lower surface of the protective cover 7, and sliding rods 10 are slidably installed in the sliding grooves. The bottom ends of the two sliding rods 10 are fixedly installed with the same handrail 11. The surface of the sliding rods 10 is opened with two annular slots, one above the other. Two rotating shafts 12 are rotatably installed on the lower surface of the protective cover 7. A locking plate 13 is fixedly installed on the outer surface of the rotating shaft 12. A locking slot is opened on the locking plate 13 and is used in conjunction with the annular slot.

[0021] By using the protective cover 7 in conjunction with the fixing block 4, the rotating plate 5, and the fixing block 6, the protective cover 7 can be rotated open and closed. When opened, it fits against the back of the main unit housing 1, and when closed, it fits against the front of the main unit housing 1. It is locked in conjunction with the lock base 8, the lock plate 9, and the positioning plate 14, which can effectively isolate and protect the display screen and buttons on the main unit housing 1, avoid accidental touches and misoperations when not in use, and improve the stability of use. By using the handrail 11 in conjunction with the sliding rod 10, the handrail 11 can slide up and down, making it easy to pull out and put away. The position is locked by the locking plate 13. The structure is simple and easy to use.

[0022] The upper and lower surfaces of the locking plate 9 are provided with grooves, and a positioning plate 14 is movably installed in the grooves. An operating handle 15 is fixedly installed on the side of the positioning plate 14. The side of the locking plate 9 is provided with a channel for the operation handle 15 to move. The upper and lower surfaces of the lock base 8 are provided with positioning grooves for the positioning plate 14 to be inserted into. After the locking plate 9 is inserted into the lock groove, the positioning plate 14 is inserted into the positioning groove to lock the locking plate 9, thereby locking the protective cover 7.

[0023] A spring 16 and a telescopic rod 17 are fixedly installed on the inner wall of the groove on the locking plate 9. Both the spring 16 and the telescopic rod 17 are fixedly connected to the positioning plate 14. The spring force of the spring 16 can make the positioning plate 14 move quickly and insert into the positioning groove. The telescopic rod 17 can support the movement of the positioning plate 14, so that the positioning plate 14 has good stability when it moves and is not easy to shake.

[0024] A limiting strip 18 is fixedly installed on the outer surface of the top end of the sliding rod 10, and a limiting groove is opened on the inner wall of the sliding groove. The limiting strip 18 is slidably installed on the inner wall of the limiting groove.

[0025] Using the above scheme, the sliding bar 18 slides in the limiting groove, which can ensure the stability of the sliding rod 10. The retaining rod 19 is slidably installed on the sliding plate 13. The bottom end of the retaining rod 19 is fixedly installed with a pull plate 20. The lower surface of the protective cover 7 is provided with a retaining groove for the retaining rod 19 to be inserted. By using the retaining rod 19 in conjunction with the retaining groove, the position of the plate 13 can be locked to prevent accidental rotation and opening.

[0026] An opening is provided on the clamping plate 13 at the position opposite to the retaining rod 19. A limiting ring 21 is fixedly installed on the outer surface of the retaining rod 19. The limiting ring 21 is located inside the opening. A spring 22 is fixedly installed between the limiting ring 21 and the inner wall of the opening. By using the limiting ring 21 in conjunction with the spring 22, the elastic force of the spring 22 can drive the retaining rod 19 to be quickly inserted into the retaining groove, improving the convenience of the fixing operation. The setting of the limiting ring 21 can play a limiting role to prevent the retaining rod 19 from sliding out of the clamping plate 13.

[0027] In use, the protective cover 7 initially isolates and protects the display screen and buttons on the surface of the main unit housing 1. When measurement is required, the clamp-type voltage sensor 3 is first clamped onto the surface of the cable to be tested. Then, the operating handle 15 is turned to drive the positioning plate 14 to move and disengage from the positioning groove. At this time, the locking plate 9 and the locking seat 8 are unlocked, that is, the protective cover 7 is unlocked. Utilizing the rotational characteristics between the fixed block 2 6 and the rotating plate 5, and the rotational characteristics between the rotating plate 5 and the fixed block 1 4, the protective cover 7 is rotated to the other side of the main unit housing 1. Similarly, the operating handle 15 is turned to cause the positioning plate 14 to compress the spring 16 and deform and retract into the groove. Then, the locking plate 9 is inserted into the locking groove on the locking seat 8. The elastic force of the spring 16 drives the positioning plate 14 to move and insert into the positioning groove, completing the locking of the protective cover 7 after it is opened. Then, the electronic control board inside the main unit housing 1 is used to... The test line 2 is used for testing. The display and buttons on the surface of the main unit housing 1 are used for display and control. After use, the protective cover 7 is unlocked and rotated to close, thus isolating and protecting the display and buttons on the main unit housing 1 to prevent accidental contact or operation. At the same time, the handrail 11 can be pulled out. First, pull the pull plate 20 to drive the retaining rod 19 to move away from the retaining groove. At this time, the locking plate 13 is unlocked. Rotate the locking plate 13 to separate the locking slot on the locking plate 13 from the annular locking groove below the surface of the sliding rod 10. At this time, the sliding rod 10 is unlocked and can slide down, thereby pulling out the handrail 11. After pulling out, rotate the locking plate 13 to reset it so that the locking slot on the locking plate 13 engages with the annular locking groove above the surface of the sliding rod 10. At this time, the retaining rod 19 will be locked into the retaining groove under the action of the spring 22, thus locking the locking plate 13. Then, it can be carried and used through the handrail 11.

Claims

1. A non-contact AC voltage measuring instrument, characterized in that: The system includes a main casing (1), on the surface of which is provided a display screen and buttons. An electronic control board electrically connected to the display screen and buttons is located inside the main casing (1). Several detection lines (2) pass through the surface of the main casing (1). One end of each detection line (2) is electrically connected to the electronic control board inside the main casing (1), and the other end is electrically connected to a clamp-type voltage sensor (3). Two fixing blocks (4) are fixedly installed on the side of the main casing (1). A rotating plate (5) is rotatably installed between the two fixing blocks (4). Fixing blocks (6) are rotatably installed on both the upper and lower surfaces of the rotating plate (5). A protective cover (7) is fixedly installed on the side of the two fixing blocks (6). The protective cover (7) is used to protect the main casing (1). 1) The display screen and buttons on the surface are protected. A lock seat (8) is fixedly installed on the side of the main body shell (1). Lock grooves are opened on both opposite sides of the lock seat (8). A lock plate (9) is fixedly installed on the side of the protective cover (7) and is locked in the lock groove. Two sliding grooves are opened on the lower surface of the protective cover (7), and a sliding rod (10) is slidably installed in the sliding groove. The bottom ends of the two sliding rods (10) are fixedly installed with the same handrail (11). Two annular slots are opened on the surface of the sliding rod (10). Two rotating shafts (12) are rotatably installed on the lower surface of the protective cover (7). A card plate (13) is fixedly installed on the outer surface of the rotating shaft (12). A slot is opened on the card plate (13) and the slot is used in conjunction with the annular slot.

2. The non-contact AC voltage measuring instrument according to claim 1, characterized in that: The upper and lower surfaces of the lock plate (9) are provided with grooves, and a positioning plate (14) is movably arranged in the grooves. An operating handle (15) is fixedly installed on the side of the positioning plate (14). The side of the lock plate (9) is provided with a channel for the operating handle (15) to move. The upper and lower surfaces of the lock seat (8) are provided with positioning grooves for the positioning plate (14) to be inserted.

3. The non-contact AC voltage measuring instrument according to claim 2, characterized in that: A spring (16) and a telescopic rod (17) are fixedly installed on the inner wall of the groove on the locking plate (9). The spring (16) and the telescopic rod (17) are both fixedly connected to the positioning plate (14).

4. The non-contact AC voltage measuring instrument according to claim 1, characterized in that: A limiting strip (18) is fixedly installed on the outer surface of the top end of the sliding rod (10), and a limiting groove is opened on the inner wall of the sliding groove. The limiting strip (18) is slidably installed on the inner wall of the limiting groove.

5. The non-contact AC voltage measuring instrument according to claim 1, characterized in that: A retaining rod (19) is slidably installed on the card plate (13), and a pull plate (20) is fixedly installed at the bottom end of the retaining rod (19). A retaining groove for inserting the retaining rod (19) is opened on the lower surface of the protective cover (7).

6. The non-contact AC voltage measuring instrument according to claim 5, characterized in that: An opening is provided on the card plate (13) at the position opposite to the retaining rod (19). A limiting ring (21) is fixedly installed on the outer surface of the retaining rod (19). The limiting ring (21) is located inside the opening. A spring (22) is fixedly installed between the limiting ring (21) and the inner wall of the opening.

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