Electric power meter with dustproof and anti-fog functions

Abstract

The invention relates to the technical field of electric power meters, in particular to an electric power meter with dustproof and anti-fog functions, which comprises a meter shell, a wiring end assembly, a wiring assembly and a connecting assembly, a positioning sleeve of the connecting assembly is fixedly connected with a bottom cavity wall of the meter shell, and a second connecting column of the connecting assembly is fixedly connected with the wiring end assembly. The wiring end assembly is arranged in a cavity in the bottom of the instrument shell through the connecting assembly, the wiring assembly is connected with a wiring hole of the wiring end assembly through an external thread, the instrument shell is provided with a sliding groove and a first empty groove, and the connecting assembly is provided with a connecting block, a first connecting column and a spring. A connecting wire is inserted into the wiring hole and drives the wiring end assembly to move upwards, and the second connecting column is driven to compress the spring, so that the first connecting block clamped in the first empty groove is separated from the first empty groove, and the wiring end assembly slides downwards along the sliding groove until the wiring hole completely extends out of the bottom cavity of the instrument shell.

Description

Technical Field

[0001] The present invention relates to the technical field of electric power meters, in particular to an electric power meter with dust and fog proof functions. Background Art

[0002] Power meters are power measurement and control devices that provide solutions for power parameter measurement, power quality monitoring and analysis, and electrical equipment control. However, there are uncertainties in the installation environment of power meters. If the power meter is in a dusty environment, the dust and various suspended particles in the air will cause increased contamination on the surface of the power meter insulator, seriously damaging the insulator and leading to an increasing number of accidents such as tripping, discharge, leakage, and circuit breaker. At the same time, it is most likely to cause flashover.

[0003] During the search process, it was found that patent application number CN202310483922.1 discloses a fog-proof and dust-proof electric meter. Through the setting of a resistance spring, a resistance block, a limit block, a U-shaped plate, a connecting rod and a protrusion, it is achieved that one wiring port is always guaranteed to be open, and the next wiring port can only be wired after the wiring of the previous wiring port is completed, ensuring the correct wiring sequence. At the same time, through the setting of the main board, clamping spring, inner plate, rotating shaft, torsion spring and protective cover, the wiring gap of the electric meter can be protected from dust and water vapor even when there is no wiring. After wiring, the setting of the through groove can avoid the generation of gaps, preventing dust from entering the interior of the instrument body through the wiring gaps, and has the function of dust and fog prevention.

[0004] However, the wiring port is arranged at the back of the instrument housing in this solution, which is easily affected by the moisture of the wall.

[0005] Therefore, an electric power meter with dust and fog proof functions is proposed. Summary of the Invention

[0006] The technical problem addressed by this application is that when installing power meters, multiple meters are typically mounted on the same electrical cabinet or wall. The placement of adjacent meters, above, below, or on the left and right sides results in limited space, adversely impacting the wiring access to the meter's wiring holes. Furthermore, dust, impurities, and moisture in the environment surrounding the meter significantly impact the meter, particularly at the wiring points. Conventional technology places the wiring ports behind the meter housing, making them susceptible to moisture from the wall.

[0007] To solve the above technical problems, the embodiment of the present application provides an electric power meter with dust and fog proof functions, comprising an instrument housing, a terminal assembly, a wiring assembly, and a connecting assembly, wherein a positioning sleeve of the connecting assembly is fixedly connected to the cavity wall at the bottom of the instrument housing, a second connecting post of the connecting assembly is fixedly connected to the terminal assembly, and the wiring assembly is connected to the wiring hole of the terminal assembly via a connecting wire having an external thread, the instrument housing is provided with a slide groove and an empty groove, and the connecting assembly is provided with a connecting block, a first connecting post, and a spring; By inserting the connecting wire into the wiring hole and driving the terminal assembly to move upward, the second connecting column is driven to compress the spring, so that the connecting block 1 engaged in the empty slot 1 is disengaged from the empty slot 1, and the terminal assembly slides downward along the slide groove until the wiring hole is completely extended out of the bottom cavity of the instrument case.

[0008] In some embodiments, a display screen is provided on the front of the instrument case, a button is provided below the display screen, a limit block is provided near the bottom of the terminal assembly in the bottom cavity of the instrument case, and the slide groove is a channel formed by the side walls of the bottom cavity of the instrument case and the two sides of the terminal assembly.

[0009] In some embodiments, a wiring hole is provided at the bottom of the wiring terminal assembly, an internal thread is provided in the wiring hole, the distribution length of the internal thread accounts for one quarter of the length of the wiring hole, and protrusions are provided on both sides of the upper part of the wiring terminal assembly.

[0010] In some embodiments, the wiring assembly includes a nut disposed on the connecting wire and an external thread disposed on the front portion of the nut.

[0011] In some embodiments, the connecting assembly includes a positioning sleeve arranged on the inner wall of the cavity at the bottom of the instrument housing, a connecting column 1 arranged in the positioning sleeve, a spring arranged at the bottom of the connecting column, a connecting plate arranged at the bottom of the spring, and a connecting column 2 arranged at the bottom of the connecting plate.

[0012] In some embodiments, the connecting assembly also includes a connecting block 2 arranged on the left and right sides of the connecting plate, a slot 3 arranged in the middle of the connecting block 2, a connecting shaft 2 set through the slot 3, and a connecting rod connected to the connecting shaft 2.

[0013] In some embodiments, the connecting assembly further includes a connecting block 1 disposed at the left end of the connecting rod, a slot 2 disposed in the middle of the connecting block 1, and a connecting shaft 1 disposed through the slot 2 and connected to the connecting rod.

[0014] In some embodiments, the external thread and the internal thread are of equal length and mesh with each other.

[0015] In some embodiments, the bottom surface of the protrusion is consistent in size with the top surface of the limiting block.

[0016] In some embodiments, the connecting rod is hingedly connected to the first connecting shaft and the second connecting shaft.

[0017] The present invention has at least the following beneficial effects: 1. By inserting the connecting wire of the wiring assembly into the wiring hole of the terminal assembly and using the connecting wire to drive the terminal assembly to move upward, the connecting column 2 of the connecting assembly connected to the terminal assembly compresses the spring, thereby causing the connecting block 1 that is engaged in the empty slot 1 of the instrument case to disengage from the empty slot 1. At this time, the terminal assembly can slide downward along the slide groove of the instrument case until the wiring hole part of the terminal assembly is completely extended out of the bottom cavity of the instrument case.

[0018] 2. By arranging a nut and an external thread connector on the connecting line, which engages with the internal thread in the wiring hole of the component of the terminal group, the closure of the wiring hole can be ensured, that is, the external thread and the internal thread extend the movement path of external dust, impurities and water vapor, ensuring that the interior of the instrument case is not affected by external environmental dust, impurities and water vapor. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 for Figure 1 Enlarged view of point A in the middle; Figure 3 for Figure 2 Top view and BB cross-sectional view of the present invention; Figure 4 for Figure 3 Enlarged view of point C in the middle; Figure 5 for Figure 3 Enlarged view of point D in the middle; Figure 6 for Figure 3 Enlarged view of point E in the middle; Figure 7 It is a bottom view and FF cross-sectional view of the present invention; Figure 8 for Figure 7 Enlarged view of point G in the middle; Figure 9 This is a schematic diagram of the connection assembly structure of the present invention; Figure 10 for Figure 9 Enlarged view of H in the middle; Figure 11 for Figure 9 Enlarged view of point I in the middle.

[0020] In the figure: 100-instrument case; 101-display screen; 102-button; 103-limit block; 104-slide; 105-empty slot one; 200-terminal assembly; 201-wiring hole; 202-internal thread; 203-protrusion; 300-wiring assembly; 301-nut; 302-external thread; 303-connecting wire; 400-connecting assembly; 401-connecting block one; 402-connecting shaft one; 403-connecting rod; 404-connecting block two; 405-connecting shaft two; 406-connecting plate; 407-positioning sleeve; 408-connecting column one; 409-spring; 410-connecting column two; 411-empty slot two; 412-empty slot three. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] Example 1, please refer to Figures 1-11 The present invention provides a technical solution: an electric power meter with dust and fog proof functions, comprising an instrument housing 100, a terminal assembly 200, a wiring assembly 300, and a connecting assembly 400. A positioning sleeve 407 of the connecting assembly 400 is fixedly connected to the cavity wall at the bottom of the instrument housing 100, a second connecting post 410 of the connecting assembly 400 is fixedly connected to the terminal assembly 200, and the wiring assembly 300 is connected to the wiring hole 201 of the terminal assembly 200 via a connecting wire 303 having an external thread 302. The instrument housing 100 is provided with a slide groove 104 and an empty groove 105. The connecting assembly 400 is provided with a connecting block 401, a first connecting post 408, and a spring 409. By inserting the connecting wire 303 into the wiring hole 201 and driving the terminal assembly 200 to move upward, the connecting column 2 410 is driven to compress the spring 409, so that the connecting block 1 401 engaged in the empty slot 105 is disengaged from the empty slot 105, and the terminal assembly 200 slides downward along the slide groove 104 until the wiring hole 201 is completely extended out of the bottom cavity of the instrument case 100.

[0023] Specifically, the positioning sleeve 407 of the connecting component 400 is fixedly connected to the bottom cavity wall of the instrument case 100, and the connecting column 2 410 of the connecting component 400 is fixedly connected to the terminal assembly 200, so as to connect the instrument case 100 and the terminal assembly 200 together through the connecting component 400; the wiring component 300 is connected to the wiring hole 201 of the terminal assembly 200 through the external thread 302, so as to complete the wiring action by engaging the external thread 302 of the wiring component 300 with the internal thread 202 of the wiring hole 201 of the terminal assembly 200. At the same time, the mutual engagement of the external thread 302 and the internal thread 202 can ensure the closedness of the wiring hole 201, that is, the external thread 302 and the internal thread 202 extend the movement path of external dust, impurities and water vapor, thereby ensuring that the interior of the instrument case 100 is not affected by external environmental dust, impurities and water vapor. At the same time, the mutual meshing connection between the external thread 302 and the internal thread 202 also has the following benefits: high mechanical stability and vibration resistance, good stable connection, and the mechanical friction generated by tightening the thread ensures that the connection is not easy to loosen, which is especially suitable for occasions with vibration or impact. It has strong resistance to external interference. In frequent movement or force environments, the thread engagement can effectively resist pulling and avoid accidental falling off. It has good corrosion resistance. If rust-proof materials such as nickel-plated copper and stainless steel are selected, the corrosion resistance can be enhanced and the service life can be extended. The electrical performance is optimized with low contact resistance. The thread compression increases the contact area between the conductors, reduces resistance, reduces the risk of heat generation, and improves the conductive efficiency. It has good long-term reliability and a low risk of oxidation of the contact surface, especially the plated thread, to ensure a long-term and stable electrical connection. It also has the characteristics of easy installation.

[0024] Specifically, by providing the connection assembly 400, the terminal assembly 200 can be ejected and retracted from the bottom cavity of the instrument housing 100. The specific ejection process is as follows: By inserting the connecting wire 303 of the wiring assembly 300 into the wiring hole 201 of the terminal assembly 200, specifically by inserting the connecting wire 303 of the wiring assembly 300 into the wiring hole 201 of the terminal assembly 200, and engaging the external threads 302 of the wiring assembly 300 with the internal threads 202 in the wiring hole 201 of the terminal assembly 200, the inner surface of the nut 301 of the wiring assembly 300 is aligned with the bottom surface of the terminal assembly 200. The connecting wire 303 drives the terminal assembly 200 upward, and the terminal assembly 200 moves upward, driving the second connecting post 410 of the connecting assembly 400 connected to the terminal assembly 200 upward. At this time, the second connecting post 410 of the connecting assembly 400 connected to the terminal assembly 200 moves upward, driving the connecting plate 406 connected to the second connecting post 410 of the connecting assembly 400 upward. At this time, the connecting plate 406 compresses the spring 409 upward, causing the connecting plate 406 to move closer to the first connecting post 408. At this time, the connecting block 2 404 set on both sides of the connecting plate 406 moves upward together with the connecting plate 406, driving the connecting shaft 2 405 set in the connecting block 2 404 to move upward together. Since the inner end of the connecting rod 403 is hingedly connected to the connecting shaft 2 405, that is, the inner end of the connecting rod 403 can rotate around the connecting shaft 2 405, at this time the inner end of the connecting rod 403 rotates downward around the connecting shaft 2 405. The outer end of the connecting rod 403 is hingedly connected to the connecting shaft 402 in the connecting block 401 which is clamped in the empty slot 105 of the instrument housing 100, that is, the outer end of the connecting rod 403 can rotate around the connecting shaft 402. At this time, the outer end of the connecting rod 403 rotates inward around the connecting shaft 402 and at the same time, the outer end of the connecting rod 403 pulls the connecting block 401 inward, so that the clamping makes the connecting block 401 in the empty slot 105 of the instrument housing 100 disengage from the empty slot 105. At this time, the upward movement of the connecting wire 303 driving the terminal assembly 200 stops, and the terminal assembly 200 slides downward along the slide groove 104 of the instrument housing 100 until the wiring hole 201 of the terminal assembly 200 is fully extended. The bottom cavity of the instrument case 100. During this process, the connecting block 401 moves along the side wall of the bottom cavity of the instrument case 100. The connecting column 408 of the original connecting component 400 changes from extending into the positioning sleeve 407 and contacting the bottom cavity wall of the instrument case 100 to not contacting the bottom cavity wall of the instrument case 100 and detaching from the positioning sleeve 407 and sliding downward. The originally compressed spring 409 transmits the elastic force to the connecting plate 406, the connecting column 2 410, and the terminal assembly 200 in turn, popping the terminal assembly 200 downward until the protrusions 203 set on both sides of the terminal assembly 200 are just stuck on the top surface of the limit block 103 in the bottom cavity of the instrument case 100, and the pop-up action of the terminal assembly 200 stops.

[0025] Specifically, the process of retracting the terminal assembly 200 is as follows: When the external thread 302 of the wiring assembly 300 is engaged with the internal thread 202 in the wiring hole 201 of the terminal assembly 200, the inner side surface of the nut 301 of the wiring assembly 300 is in perfect contact with the bottom surface of the terminal assembly 200, indicating that the connection line 303 has been completed. At this time, the connecting line 303 is used to drive the terminal assembly 200 to move upward, and the terminal assembly 200 moves upward, driving the connecting column 2 410 of the connecting assembly 400 connected to the terminal assembly 200 to move upward. At this time, the connecting column 2 410 of the connecting assembly 400 connected to the terminal assembly 200 moves upward, driving the connecting plate 406 connected to the connecting column 2 410 of the connecting assembly 400 to move upward. At this time, the connecting plate 406 will compress the spring 409 upward, so that the connecting plate 406 approaches the connecting column 1 408. At this time, the connecting blocks 2 404 provided on both sides of the connecting plate 406 move upward along with the connecting plate 406, driving the connecting shaft 2 405 provided in the connecting blocks 2 404 to move upward together. At this time, the connecting column 1 408 of the connecting assembly 400 does not contact the cavity wall at the bottom of the instrument case 100. When the terminal assembly 200 moves upward until the connecting column 1 408 of the connecting assembly 400 extends into the positioning sleeve 407 and contacts the cavity wall at the bottom of the instrument case 100, it stops moving upward. The spring 409 is compressed upward due to the inertia of the upward movement, generating a downward pop-up force, which is transmitted to the connecting plate 406, the connecting column 2 410, and the terminal assembly 200. At this time, the connecting plate 406 moves downward, driving The connecting shaft 2 405 arranged in the connecting block 2 404 moves downward. Since the inner end of the connecting rod 403 is hingedly connected to the connecting shaft 2 405, that is, the inner end of the connecting rod 403 can rotate around the connecting shaft 2 405, at this time the inner end of the connecting rod 403 rotates upward around the connecting shaft 2 405. The outer end of the connecting rod 403 is hingedly connected to the connecting shaft 402 in the connecting block 401 which is clamped in the empty slot 105 of the instrument case 100, that is, the outer end of the connecting rod 403 can rotate around the connecting shaft 402. At this time, the outer end of the connecting rod 403 rotates outward around the connecting shaft 402 and at the same time, the outer end of the connecting rod 403 pulls the connecting block 401 outward, so that the connecting block 401 that moves to the exit position of the empty slot 105 of the instrument case 100 just enters the empty slot 105 and is clamped in the empty slot 105 of the instrument case 100. At this point, the terminal assembly 200 is retracted into the bottom cavity of the instrument case 100.

[0026] Example 2, please refer to Figure 1-3 , Figure 7 A display screen 101 is provided on the front of the instrument case 100, a button 102 is provided below the display screen 101, a limit block 103 is provided near the bottom of the terminal assembly 200 in the bottom cavity of the instrument case 100, and the slide groove 104 is a channel formed by the side wall of the bottom cavity of the instrument case 100 and the two sides of the terminal assembly 200.

[0027] Specifically, a display screen 101 is provided on the front of the instrument housing 100 to display the monitored power data such as current, voltage, power and other data on the display screen 101; a button 102 is provided below the display screen 101 to perform the next operation when the power data is displayed on the display screen 101.

[0028] Specifically, a limit block 103 is provided in the bottom cavity of the instrument case 100 near the bottom of the terminal assembly 200, and the slide groove 104 is a channel formed by the side walls of the bottom cavity of the instrument case 100 and the two sides of the terminal assembly 200. The purpose is that when the terminal assembly 200 slides down out of the bottom cavity of the instrument case 100, the terminal assembly 200 can slide downward along the slide groove 104 and slide to the maximum distance to use the limit block 103 to clamp the terminal assembly 200 to prevent the terminal assembly 200 from sliding further.

[0029] Example 3, see Figure 1-3 、 Figure 7 A wiring hole 201 is provided at the bottom of the terminal assembly 200, and an internal thread 202 is provided in the wiring hole 201. The distribution length of the internal thread 202 accounts for one-fourth of the length of the wiring hole 201. Protrusions 203 are provided on both sides of the upper portion of the terminal assembly 200. The bottom surface of the protrusion 203 is the same size as the top surface of the limit block 103.

[0030] Specifically, the purpose of setting the wiring hole 201 at the bottom of the wiring terminal component 200 is that, compared with the prior art in which the wiring hole 201 is set at the rear end of the instrument case 100, which is inconvenient for wiring and will be affected by the moisture of the wall at the rear end of the instrument case 100, the wiring hole 201 is set at the bottom of the wiring terminal component 200 and can pop out and retract from the bottom cavity of the instrument case 100 to facilitate wiring and will not be affected by the moisture of the wall at the rear end of the instrument case 100; the internal thread 202 is set in the wiring hole 201, and the purpose is to cooperate with the external thread 302 to install the connecting wire 303.

[0031] Example 4, see Figure 1-2 The wiring assembly 300 includes a nut 301 disposed on a connecting wire 303 and an external thread 302 disposed on the front of the nut 301. The external thread 302 is equal in length to the internal thread 202, and the external thread 302 and the internal thread 202 are engaged with each other.

[0032] Specifically, the wiring is accomplished by engaging the external threads 302 of the wiring assembly 300 with the internal threads 202 of the wiring hole 201 of the terminal assembly 200. The engagement of the external threads 302 and the internal threads 202 ensures the sealing of the wiring hole 201. This means that the external threads 302 and the internal threads 202 extend the path for the movement of external dust, impurities, and moisture, thereby protecting the interior of the instrument housing 100 from the effects of external dust, impurities, and moisture. Furthermore, the device offers the following advantages: Easy installation and standardized compatibility, requiring no special tools: Installation can be completed with a standard wrench, reducing reliance on specialized tools or welding. Strong compatibility, in compliance with industry standards such as M-series metric threads and NPT pipe threads, facilitates part replacement and adaption to different manufacturers' products. Easy maintenance and removability facilitate inspection and repair. The threaded connection can be disassembled multiple times, facilitating inspection or replacement of internal wiring and reducing maintenance costs. The pre-assembled design allows the terminal blocks to be pre-assembled, reducing on-site installation time.

[0033] Example 5, Figure 3-Figure 11 The connecting assembly 400 includes a positioning sleeve 407 arranged on the inner wall of the cavity at the bottom of the instrument housing 100, a connecting column 1 408 arranged in the positioning sleeve 407, a spring 409 arranged at the lower part of the connecting column 1 408, a connecting plate 406 arranged at the lower part of the spring 409, and a connecting column 2 410 arranged at the lower part of the connecting plate 406.

[0034] The connecting assembly 400 also includes a second connecting block 404 arranged on the left and right sides of the connecting plate 406, a third empty slot 412 arranged in the middle of the second connecting block 404, a second connecting shaft 405 set through the third empty slot 412, and a connecting rod 403 connected to the second connecting shaft 405.

[0035] The connecting assembly 400 further includes a connecting block 1 401 disposed at the left end of the connecting rod 403, a second slot 411 disposed in the middle of the connecting block 1 401, and a connecting shaft 1 402 disposed through the second slot 411 and connected to the connecting rod 403. The connecting rod 403 is hingedly connected to the connecting shaft 1 402 and the second connecting shaft 405.

[0036] Specifically, when the terminal assembly 200 is in a retracted state, that is, when the connecting block 401 of the connecting assembly 400 is engaged with the empty slot 105 of the instrument case 100, the connecting column 408 arranged in the positioning sleeve 407 contacts the bottom cavity wall of the instrument case 100; when the terminal assembly 200 is in a pop-up state, the connecting block 401 of the connecting assembly 400 is disengaged from the empty slot 105 of the instrument case 100, that is, when the connecting block 401 of the connecting assembly 400 is against the bottom cavity side wall of the instrument case 100, it does not contact the bottom cavity wall of the instrument case 100 and is disengaged from the positioning sleeve 407.

[0037] Specifically, the connecting rod 403 is hingedly connected to the connecting shaft 1 402 and the connecting shaft 2 405, that is, the inner end of the connecting rod 403 can rotate around the connecting shaft 2 405, and the outer end of the connecting rod 403 can rotate around the connecting shaft 1 402. When the connecting blocks 2 404 provided on both sides of the connecting plate 406 move upward along with the connecting plate 406, the connecting shaft 2 405 provided in the connecting block 2 404 moves upward together. At this time, the inner end of the connecting rod 403 rotates downward around the connecting shaft 2 405, and the outer end of the connecting rod 403 rotates around the connecting shaft 1 402. It rotates inward and at the same time, the outer end of the connecting rod 403 pulls the connecting block 401 inward, so that the connecting block 401 in the empty slot 105 of the instrument housing 100 is snapped out of the empty slot 105; when the connecting plate 406 moves downward, it drives the connecting shaft 2 405 set in the connecting block 2 404 to move downward together. Since the inner end of the connecting rod 403 is hingedly connected to the connecting shaft 2 405, that is, the inner end of the connecting rod 403 can rotate around the connecting shaft 2 405, at this time the inner end of the connecting rod 403 rotates upward around the connecting shaft 2 405. The outer end of the connecting rod 403 is hingedly connected to the connecting shaft 402 in the connecting block 401 which is clamped in the empty slot 105 of the instrument case 100, that is, the outer end of the connecting rod 403 can rotate around the connecting shaft 402. At this time, the outer end of the connecting rod 403 rotates outward around the connecting shaft 402 and at the same time, the outer end of the connecting rod 403 pulls the connecting block 401 outward, so that the connecting block 401 that moves to the exit position of the empty slot 105 of the instrument case 100 just enters the empty slot 105 and is clamped in the empty slot 105 of the instrument case 100. At this point, the terminal assembly 200 is retracted into the bottom cavity of the instrument case 100.

[0038] The following combination Figures 1-11 Instructions for using this dust and fog proof power meter: First, the connecting wire 303 of the wiring assembly 300 is inserted into the wiring hole 201 of the terminal assembly 200. Specifically, the connecting wire 303 of the wiring assembly 300 is inserted into the wiring hole 201 of the terminal assembly 200, and the external thread 302 of the wiring assembly 300 engages with the internal thread 202 in the wiring hole 201 of the terminal assembly 200. At this time, the inner surface of the nut 301 of the wiring assembly 300 is aligned with the bottom surface of the terminal assembly 200. The connecting wire 303 drives the terminal assembly 200 upward, and the terminal assembly 200 moves upward, driving the second connecting post 410 of the connecting assembly 400 connected to the terminal assembly 200 upward. At this time, the second connecting post 410 of the connecting assembly 400 connected to the terminal assembly 200 moves upward, driving the connecting plate 406 connected to the second connecting post 410 of the connecting assembly 400 upward. At this time, the connecting plate 406 compresses the spring 409 upward, causing the connecting plate 406 to move closer to the first connecting post 408. At this time, the connecting block 2 404 set on both sides of the connecting plate 406 moves upward together with the connecting plate 406, driving the connecting shaft 2 405 set in the connecting block 2 404 to move upward together. Since the inner end of the connecting rod 403 is hingedly connected to the connecting shaft 2 405, that is, the inner end of the connecting rod 403 can rotate around the connecting shaft 2 405, at this time the inner end of the connecting rod 403 rotates downward around the connecting shaft 2 405. The outer end of the connecting rod 403 is hingedly connected to the connecting shaft 402 in the connecting block 401 which is clamped in the empty slot 105 of the instrument housing 100, that is, the outer end of the connecting rod 403 can rotate around the connecting shaft 402. At this time, the outer end of the connecting rod 403 rotates inward around the connecting shaft 402 and at the same time, the outer end of the connecting rod 403 pulls the connecting block 401 inward, so that the clamping makes the connecting block 401 in the empty slot 105 of the instrument housing 100 disengage from the empty slot 105. At this time, the upward movement of the connecting wire 303 driving the terminal assembly 200 stops, and the terminal assembly 200 slides downward along the slide groove 104 of the instrument housing 100 until the wiring hole 201 of the terminal assembly 200 is fully extended. The bottom cavity of the instrument case 100. During this process, the connecting block 401 moves along the side wall of the bottom cavity of the instrument case 100. The connecting column 408 of the original connecting component 400 changes from extending into the positioning sleeve 407 and contacting the bottom cavity wall of the instrument case 100 to not contacting the bottom cavity wall of the instrument case 100 and detaching from the positioning sleeve 407 and sliding downward. The originally compressed spring 409 transmits the elastic force to the connecting plate 406, the connecting column 2 410, and the terminal assembly 200 in turn, popping the terminal assembly 200 downward until the protrusions 203 set on both sides of the terminal assembly 200 are just stuck on the top surface of the limit block 103 in the bottom cavity of the instrument case 100, and the pop-up action of the terminal assembly 200 stops.

[0039] When the external thread 302 of the wiring assembly 300 is engaged with the internal thread 202 in the wiring hole 201 of the terminal assembly 200, the inner side surface of the nut 301 of the wiring assembly 300 is in perfect contact with the bottom surface of the terminal assembly 200, indicating that the connection line 303 has been completed. At this time, the connecting line 303 is used to drive the terminal assembly 200 to move upward, and the terminal assembly 200 moves upward, driving the connecting column 2 410 of the connecting assembly 400 connected to the terminal assembly 200 to move upward. At this time, the connecting column 2 410 of the connecting assembly 400 connected to the terminal assembly 200 moves upward, driving the connecting plate 406 connected to the connecting column 2 410 of the connecting assembly 400 to move upward. At this time, the connecting plate 406 will compress the spring 409 upward, so that the connecting plate 406 approaches the connecting column 1 408. At this time, the connecting blocks 2 404 set on both sides of the connecting plate 406 move upward together with the connecting plate 406, driving the connecting shaft 2 405 set in the connecting block 2 404 to move upward together. At this time, the connecting column 1 408 of the connecting component 400 does not contact the bottom cavity wall of the instrument case 100. When the terminal assembly 200 moves upward until the connecting column 1 408 of the connecting component 400 extends into the positioning sleeve 407 and contacts the bottom cavity wall of the instrument case 100, the upward movement is stopped. The spring 409 will be compressed upward due to the inertia of the upward movement, generating a downward pop-up force, and the downward pop-up force is transmitted to the connecting plate 406, the connecting column 2 410, and the terminal assembly 200. At this time, the connecting plate 406 moves downward, driving the connecting shaft 2 405 set in the connecting block 2 404 to move downward. Since the inner end of the connecting rod 403 is hingedly connected to the connecting shaft 2 405, that is, the inner end of the connecting rod 403 can rotate around the connecting shaft 2 405, at this time the inner end of the connecting rod 403 rotates upward around the connecting shaft 2 405. The outer end of the connecting rod 403 is hingedly connected to the connecting shaft 402 in the connecting block 401 which is clamped in the empty slot 105 of the instrument case 100, that is, the outer end of the connecting rod 403 can rotate around the connecting shaft 402. At this time, the outer end of the connecting rod 403 rotates outward around the connecting shaft 402 and at the same time, the outer end of the connecting rod 403 pulls the connecting block 401 outward, so that the connecting block 401 that moves to the exit position of the empty slot 105 of the instrument case 100 just enters the empty slot 105 and is clamped in the empty slot 105 of the instrument case 100. At this point, the terminal assembly 200 is retracted into the bottom cavity of the instrument case 100.

[0040] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0041] While the embodiments of the present invention have been shown and described, it will be apparent to those skilled in the art that various changes, modifications, substitutions, and alterations can be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. An electric power meter with dust and fog proof functions, comprising a meter housing (100), a terminal assembly (200), and a wiring assembly (300), characterized in that: It also includes a connecting assembly (400), wherein the positioning sleeve (407) of the connecting assembly (400) is fixedly connected to the cavity wall at the bottom of the instrument housing (100), the connecting column 2 (410) of the connecting assembly (400) is fixedly connected to the terminal assembly (200), the terminal assembly (300) is connected to the wiring hole (201) of the terminal assembly (200) via a connecting wire (303) provided with an external thread (302), the instrument housing (100) is provided with a sliding groove (104), an empty groove 1 (105), and the connecting assembly (400) is provided with a connecting block (401), a connecting column 1 (408), and a spring (409); By inserting the connecting wire (303) into the wiring hole (201) and driving the terminal assembly (200) to move upward, the connecting column 2 (410) is driven to compress the spring (409), so that the connecting block 1 (401) engaged in the empty slot 1 (105) is disengaged from the empty slot 1 (105), and the terminal assembly (200) slides downward along the slide groove (104) until the wiring hole (201) is completely extended out of the bottom cavity of the instrument housing (100).

2. The electric power meter with dust and fog proof functions according to claim 1, characterized in that: The front of the instrument housing (100) is provided with a display screen (101), a button (102) is provided below the display screen (101), a limit block (103) is provided near the bottom of the terminal assembly (200) in the bottom cavity of the instrument housing (100), and the slide groove (104) is a channel formed by the side wall of the bottom cavity of the instrument housing (100) and the two sides of the terminal assembly (200).

3. The electric power meter with dust and fog proof functions according to claim 2, characterized in that: The wiring hole (201) is provided at the bottom of the wiring terminal assembly (200), the internal thread (202) is provided in the wiring hole (201), the distribution length of the internal thread (202) accounts for one quarter of the length of the wiring hole (201), and protrusions (203) are provided on both sides of the upper part of the wiring terminal assembly (200).

4. The electric power meter with dust and fog proof functions according to claim 3, characterized in that: The wiring assembly (300) comprises a nut (301) arranged on the connecting wire (303), and an external thread (302) arranged at the front of the nut (301).

5. The electric power meter with dust and fog proof functions according to claim 1, characterized in that: The connecting assembly (400) includes a positioning sleeve (407) arranged on the inner wall of the bottom cavity of the instrument housing (100), a connecting column 1 (408) arranged in the positioning sleeve (407), a spring (409) arranged at the bottom of the connecting column 1 (408), a connecting plate (406) arranged at the bottom of the spring (409), and a connecting column 2 (410) arranged at the bottom of the connecting plate (406).

6. The electric power meter with dust and fog proof functions according to claim 5, characterized in that: The connecting assembly (400) further includes a second connecting block (404) disposed on the left and right sides of the connecting plate (406), a third empty slot (412) disposed in the middle of the second connecting block (404), a second connecting shaft (405) disposed through the third empty slot (412), and a connecting rod (403) connected to the second connecting shaft (405).

7. The electric power meter with dust and fog proof functions according to claim 6, characterized in that: The connecting assembly (400) further includes a connecting block (401) disposed at the left end of the connecting rod (403), a second empty slot (411) disposed in the middle of the connecting block (401), and a connecting shaft (402) disposed through the second empty slot (411) and connected to the connecting rod (403).

8. The electric power meter with dust and fog proof functions according to claim 4, characterized in that: The external thread (302) and the internal thread (202) are of equal length, and the external thread (302) and the internal thread (202) are meshed with each other.

9. The electric power meter with dust and fog proof functions according to claim 3, characterized in that: The bottom surface of the protrusion (203) is consistent in size with the top surface of the limiting block (103).

10. The electric power meter with dust and fog proof functions according to claim 7, characterized in that: The connecting rod (403) is hingedly connected to the first connecting shaft (402) and the second connecting shaft (405).

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