Electric energy meter

Abstract

The invention relates to an electric energy meter which comprises a shell and a guide rail, a sliding groove is formed in the bottom of the shell, the shell is installed on the guide rail in a sliding mode, a pair of wire inlet holes are formed in one end of the shell, a wiring hole is formed in the top end of the shell, and a wiring board used for wiring is fixedly installed in the shell. A wiring hole is formed in the shell, a wire pressing mechanism is arranged above the wiring board, a binding post is movably installed in the wiring hole and penetrates through the wiring board, a wire pressing plate used for pressing wires is arranged on the binding post, a compression spring is clamped to the bottom end of the binding post, the cover plate is movably clamped with the shell, and when the cover plate is closed, the compression spring is clamped to the bottom end of the binding post. The cover plate abuts against the binding post and drives the wire pressing plate to press a wire end on the wiring board. An operator only needs to insert a wire end and then cover the cover plate, and does not need to screw a bolt, so that the installation time is greatly shortened, and the installation efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of electric energy meters, in particular to an electric energy meter. Background Art

[0002] The installation of the rail-mounted electric energy meter is generally based on the traditional wall-mounted installation method, which has the disadvantages of large size and inconvenient installation. The rail-mounted electric energy meter adopts a modular design, which has the advantages of small size, easy installation, and easy networking. It is easy to realize terminal lighting electric energy measurement and facilitate the transformation of lighting system to install electric energy meters.

[0003] When installing the existing rail-type electric energy meter, first insert the wire end into the electric energy meter, then screw in the bolts set on the electric energy meter to tighten the wire end, and then cover the cover. This process requires the operator to tighten the bolts, which is time-consuming and greatly reduces the installation efficiency. In addition, in order to avoid extra wire length, most of the rail-type electric energy meters are wired after the electric energy meter is placed on the rail, resulting in crowded wiring space and inconvenient manual operation. Therefore, it does not meet the existing needs, and we have proposed an electric energy meter for this purpose. Summary of the invention

[0004] The present invention provides an electric energy meter with the beneficial effects of short installation time, high installation efficiency and convenient manual operation, which solves the problem mentioned in the above background technology that the existing electric energy meter needs operators to tighten bolts during installation, which is a time-consuming process and greatly reduces the installation efficiency. In addition, in order to avoid extra wire length, most of the current rail-type electric energy meters are wired only after the electric energy meter is placed on the rail, resulting in crowded wiring space and inconvenient manual operation.

[0005] The present invention provides the following technical solution: an electric energy meter, comprising a shell and a guide rail, the shell being slidably mounted on the guide rail, a pair of wire entry holes being provided at one end of the shell, a wiring hole being provided at the top of the shell, a wiring board for wiring being fixedly mounted in the shell, a wire pressing mechanism being provided above the wiring board, the wire pressing mechanism comprising a terminal, the terminal being movably mounted in the wiring hole, and the terminal being inserted through the terminal board, a wire pressing plate for wire pressing being provided on the terminal, a compression spring being provided inside the shell, and the compression spring being clamped at the bottom end of the terminal; A cover plate is rotatably mounted on the upper end of the shell, and the cover plate is movably engaged with the shell. When the cover plate is closed, the cover plate contacts the terminal post and drives the wire pressing plate to press the wire end onto the terminal board.

[0006] As an optional solution of the electric energy meter described in the present invention, the cover plate is set as a transparent plastic plate with an L-shaped cross-section, a handle is installed on the surface of the cover plate, and a pair of wire clamping grooves are opened at one end of the cover plate, and the wire ends pass through the wire clamping grooves and are clamped on the housing by the wire clamping grooves; An observation hole is also provided at one end of the shell, and the observation hole is arranged adjacent to the wire entry hole.

[0007] As an optional solution of the electric energy meter described in the present invention, wherein: a pressing block is installed on the top of the terminal, the pressing block is set as a circular plate, and a No. 1 rubber pad is installed on the pressing block; A limit block is installed at the bottom of the terminal, and the upper end of the compression spring is in conflict with the bottom end of the limit block.

[0008] As an optional solution of the electric energy meter described in the present invention, wherein: a mounting seat is arranged in the housing, the bottom end of the compression spring is mounted on the mounting seat, a threaded hole is opened at the top end of the mounting seat, a threaded section is arranged at the bottom end of the terminal, and the threaded section is rotatably mounted in the threaded hole; A driven gear is rotatably mounted on the bottom end of the terminal board, and the driven gear is transmission-connected to the cover plate through a transmission mechanism. A key slot is provided on the driven gear, and a key block is mounted on one side of the terminal post, and the key block is slidably engaged with the key slot.

[0009] As an optional solution for an electric energy meter described in the present invention, a rotating shaft is fixedly installed at the hinged end of the cover plate, the rotating shaft is rotatably installed with the shell, first bevel gears are respectively installed at both ends of the rotating shaft, and the first bevel gear is transmission-connected to the driven gear through the transmission mechanism.

[0010] As an optional solution of the electric energy meter described in the present invention, wherein: the transmission mechanism includes a rotating rod, the rotating rod is rotatably mounted inside the housing, a second bevel gear is mounted on one end of the rotating rod, and the second bevel gear is meshed with the first bevel gear; A driving gear is installed at the other end of the rotating rod, and a transmission gear is rotatably installed inside the housing. The transmission gear is meshed with the driving gear, and the transmission gear is also meshed with the driven gear.

[0011] As an optional solution of the electric energy meter described in the present invention, wherein: a horizontal plate is installed on the terminal post, a winding mechanism is arranged on the horizontal plate, the winding mechanism comprises a first sleeve, the first sleeve is installed on the horizontal plate, a first spring is arranged in the first sleeve, a first moving column is slidably installed in the first sleeve, the top end of the first moving column contacts the bottom end of the first spring, a wire pressing block is installed at the bottom of the first moving column, the wire pressing block is arranged in an arch shape, and a No. 2 rubber pad is installed at the bottom end of the wire pressing block; When not in use, the wire pressing block is arranged corresponding to the wire entry hole.

[0012] As an optional solution of the electric energy meter described in the present invention, a fixing sleeve is installed at the upper end of the terminal block, and the fixing sleeve is arranged on the periphery of the terminal post.

[0013] As an optional solution of the electric energy meter described in the present invention, wherein: a second sleeve is also installed on the horizontal plate, and a second spring is arranged in the second sleeve; The wire pressing plate is configured as an annular plate, and the inner diameter of the wire pressing plate is equal to the outer diameter of the fixed sleeve. A second movable column is installed at the upper end of the wire pressing plate. The second movable column is slidably installed in the second sleeve, and the top end of the second movable column contacts the bottom end of the second spring.

[0014] As an optional solution for an electric energy meter described in the present invention, a wire tube is provided on the terminal board, one end of the wire tube is connected to the wire entry hole, the other end of the wire tube is facing the wire pressing block, and the inner diameter of the wire entry port of the wire tube is larger than the inner diameter of the wire outlet port.

[0015] The present invention has the following beneficial effects:

[0016] 1. The guide rail type electric energy meter is provided with a wire entry hole and an observation hole. The wire entry hole is used to insert the wire end, and the wiring condition inside the electric energy meter can be observed through the observation hole and the transparent cover. When wiring, after the wire end is inserted into the wire entry hole, the cover is directly covered to move the terminal downward. The terminal is provided with a wire pressing plate for pressing the wire. When the terminal moves downward, the wire pressing plate moves downward accordingly, so that the wire pressing plate presses the wire end on the terminal board to complete the wiring operation. In this process, the operator only needs to insert the wire end and then cover the cover, and does not need to screw in the bolts, thereby reducing the installation time and facilitating manual operation.

[0017] 2. The guide rail type electric energy meter has a cover plate rotatably installed on the electric energy meter, and the cover plate and the driven gear are connected through a transmission mechanism. When the cover plate rotates, the driven gear will be driven to rotate, and the driven gear and the terminal are slidably engaged. Therefore, when the driven gear rotates, the terminal also rotates. A threaded section is provided at the bottom end of the terminal, and the threaded section is threadedly installed in a threaded hole on the mounting seat. The mounting seat has a limiting effect on the terminal, and when the cover plate is opened, the bottom end of the terminal is still installed in the threaded hole. Therefore, when the cover plate is opened, the terminal will not pop out under the action of the compression spring. When the operator opens the cover plate for inspection again during subsequent inspection of the electric meter, there is no need to re-position the terminal, thereby increasing the practicality of the device, while enhancing the stability of the wiring, and the wire head is not easy to loosen and slip, thereby increasing the reliability of the device.

[0018] 3. The guide rail type electric energy meter has a horizontal plate installed on the terminal, and a winding mechanism is installed on the horizontal plate. When the terminal moves downward, the arched wire pressing block will press the wire end. When the terminal rotates, the wire pressing block will drag the wire end to rotate with it, and the wire end will be rolled on the fixed sleeve and pressed by the pressing plate. Compared with the pressing plate directly pressing the wire end, the wire end is wound and then pressed, which increases the contact area between the wire end and the terminal board, thereby preventing the wire end from loosening and poor wiring, and further increasing the reliability of the device; In addition, the wire pressing plate is set as an annular plate, and the inner diameter of the annular plate is equal to the outer diameter of the fixed sleeve, so as to ensure that the wire pressing plate can move down smoothly and press the wire end. Since the displacement of the terminal is fixed, a second spring is arranged above the wire pressing plate. When the diameter of the wire end is thin, under the action of the second spring, the wire pressing plate can also press the wire end, thereby reducing the occurrence of loose wire ends and poor wiring, and further increasing the reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0020] Figure 2 It is a schematic diagram of the internal structure of the present invention.

[0021] Figure 3 It is a structural schematic diagram of the cover plate of the present invention.

[0022] Figure 4 It is a schematic diagram of the transmission mechanism, winding mechanism, pressing mechanism and three-dimensional structure of the present invention.

[0023] Figure 5 It is a schematic cross-sectional structure diagram of the winding mechanism and the clamping mechanism of the present invention.

[0024] Figure 6 It is a structural schematic diagram of the transmission mechanism of the present invention.

[0025] Figure 7It is a schematic diagram of the structure of the wire tube of the present invention.

[0026] Figure 8 It is a schematic diagram of the structure of the terminal of the present invention.

[0027] Fig. 9 It is a structural schematic diagram of the wire pressing block of the present invention.

[0028] Fig.10 It is a structural schematic diagram of the mounting seat of the present invention.

[0029] Fig.11 It is a schematic diagram of the enlarged structure of point A of the present invention.

[0030] Fig.12 It is a schematic diagram of the structure after winding of the present invention.

[0031] In the figure: 100, housing; 101, slide; 102, wiring hole; 103, wire entry hole; 104, observation hole; 200, guide rail; 300, cover; 301, handle; 302, wire clamping groove; 303, rotating shaft; 304, first bevel gear; 400, transmission mechanism; 401, rotating rod; 402, second bevel gear; 403, driving gear; 404, transmission gear; 405, driven gear; 406, keyway; 500, wire pressing mechanism; 501, wiring board; 502, wire pressing board; 503, wiring post ; 504, limit block; 505, compression spring; 506, pressing block; 507, rubber pad No. 1; 508, horizontal plate; 509, second sleeve; 5010, second spring; 5011, second movable column; 5012, threaded section; 5013, fixed sleeve; 5014, mounting seat; 5015, threaded hole; 5016, key block; 600, winding mechanism; 601, first sleeve; 602, first spring; 603, first movable column; 604, wire pressing block; 605, rubber pad No. 2; 701, wire tube. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0033] Embodiment 1: This embodiment is intended to solve the problem that when installing an existing electric energy meter, the operator needs to tighten the bolts twice and then cover the cover to complete the installation. The process is time-consuming and greatly reduces the installation efficiency. Figure 1-12An electric energy meter includes a housing 100 and a guide rail 200. The housing 100 is slidably mounted on the guide rail 200. A pair of wire entry holes 103 are provided at one end of the housing 100. A wiring hole 102 is provided at the top of the housing 100. A wiring board 501 for wiring is fixedly mounted in the housing 100. A wire pressing mechanism 500 is provided above the wiring board 501. The wire pressing mechanism 500 includes a terminal 503. The terminal 503 is slidably mounted in the wiring hole 102. The terminal 503 is inserted into the wiring board 501. A wire pressing plate 502 for wire pressing is provided on the terminal 503. A compression spring 505 is provided inside the housing 100. The bottom of the terminal 503 is connected to one end of the compression spring 505. The pair of wire entry holes 103 are used to insert the neutral wire and the live wire. When the wire ends are inserted, the wire ends are located above the wiring board 501. The wiring board 501 is electrically connected to the internal circuit of the electric energy meter.

[0034] It should be noted that a slide groove 101 is provided at the bottom of the shell 100, and the slide groove 101 is in sliding contact with the guide rail 200. The guide rail 200 is provided with a locking mechanism (not shown in the figure) for locking the shell 100, so the shell 100 can be selectively installed at different positions of the guide rail 200. The locking mechanism is a common technical means and is well known to those skilled in the art, so it will not be described in detail.

[0035] Also, please refer to Figure 2 A cover plate 300 is rotatably mounted on the upper end of the shell 100 , and the cover plate 300 is movably engaged with the shell 100 . When the cover plate 300 is closed, the cover plate 300 contacts the terminal 503 , and drives the wire pressing plate 502 to press the wire end onto the terminal board 501 .

[0036] Also, please refer to Figure 3 The cover plate 300 is configured as a transparent plastic plate with an L-shaped cross-section. A handle 301 is installed on the surface of the cover plate 300. A pair of wire clamping grooves 302 are opened at one end of the cover plate 300. The wire ends pass through the wire entry hole 103 and are clamped by the wire clamping grooves 302. An observation hole 104 is also opened at one end of the shell 100. The observation hole 104 is arranged adjacent to the wire entry hole 103. The wiring status inside the shell 100 can be seen through the transparent cover plate 300 and the observation hole 104.

[0037] Also, please refer to Figure 8A pressing block 506 is installed at the top of the terminal 503. The pressing block 506 is set as a circular plate. A No. 1 rubber pad 507 is installed on the pressing block 506. A limit block 504 is installed at the bottom of the terminal 503. The upper end of the compression spring 505 conflicts with the bottom end of the limit block 504. The pressing block 506 and the No. 1 rubber pad 507 work together to increase the contact area between the cover 300 and the terminal 503. Before the cover 300 is closed, under the action of the compression spring 505, the wire pressing plate 502 is located above the terminal plate 501. After the cover 300 is closed, the terminal 503 overcomes the elastic force of the compression spring 505 and moves downward until the wire pressing plate 502 presses the wire end.

[0038] In this embodiment: the cover plate 300 is configured as a transparent plastic plate with an L-shaped cross-section. When the cover plate 300 is closed, it can block the wiring hole 102 and the wire entry hole 103, and has the effect of waterproofing and preventing electric shock. An observation hole 104 is also provided at one end of the shell 100. The observation hole 104 is arranged adjacent to the wire entry hole 103. The wiring situation inside the shell 100 can be seen through the transparent cover plate 300 and the observation hole 104, making the device more practical. A handle 301 is installed on the surface of the cover plate 300. The opening and closing process of the cover plate 300 can be achieved by controlling the handle. A pair of wire clamping grooves 302 are provided at one end of the cover plate 300. The wire ends pass through the wire entry hole 103 and are clamped by the wire clamping grooves 302, which reduces the situation where the wires are easy to fall off later. Specifically, when the operator installs the electric energy meter, First, insert the neutral wire and the live wire into the wire entry hole 103 respectively, and then cover the cover 300. The cover 300 contacts the terminal 503, and a pressing block 506 is installed on the top of the terminal 503. The pressing block 506 is set as a circular plate, and a No. 1 rubber pad 507 is installed on the pressing block 506. The No. 1 rubber pad 507 is deformed after contacting the cover 300, thereby increasing the contact area between the cover 300 and the terminal 503. Then the terminal 503 is moved downward, and the wire pressing plate 502 is moved downward at the same time until the wire pressing plate 502 presses the wire end, thereby completing the wiring operation. In this process, the installer only needs to plug the stripped wires and cover the cover 300, and there is no need to tighten the bolts, which greatly reduces the installation time and improves the installation efficiency.

[0039] Embodiment 2: This embodiment is intended to solve the problem that when the cover 300 is opened, the terminal 503 will pop out under the action of the compression spring 505, and the installer needs to reposition the terminal 503. This embodiment is an improvement made on the basis of embodiment 1. For details, please refer to Figure 1-12A mounting seat 5014 is provided in the shell 100, the bottom end of the compression spring 505 is installed on the mounting seat 5014, a threaded hole 5015 is provided at the top of the mounting seat 5014, a threaded section 5012 is provided at the bottom end of the terminal 503, the threaded section 5012 is rotatably installed in the threaded hole 5015, a driven gear 405 is rotatably installed at the bottom end of the terminal board 501, the driven gear 405 is connected to the cover plate 300 through the transmission mechanism 400, a key slot 406 is provided on the driven gear 405, a key block 5016 is installed on one side of the terminal 503, and the key block 5016 is slidably engaged with the key slot 406.

[0040] For details, please refer to Figure 3 A rotating shaft 303 is fixedly mounted on one end of the cover plate 300 , and the rotating shaft 303 is rotatably mounted inside the housing 100 . First bevel gears 304 are respectively mounted on both ends of the rotating shaft 303 , and the first bevel gear 304 is transmission-connected to a driven gear 405 through a transmission mechanism 400 .

[0041] Among them, please refer to Figure 4 , Figure 5 , Figure 6 The transmission mechanism 400 includes a rotating rod 401, which is rotatably installed inside the shell 100. A second bevel gear 402 is installed at one end of the rotating rod 401, and the second bevel gear 402 is meshed with the first bevel gear 304. A driving gear 403 is installed at the other end of the rotating rod 401, and a transmission gear 404 is meshed with one side of the driving gear 403. The transmission gear 404 is rotatably installed inside the shell 100, and the transmission gear 404 is meshed with the driven gear 405.

[0042] In this embodiment: a cover plate 300 is rotatably installed on the upper end of the shell 100, and the cover plate 300 is connected to the driven gear 405 through a transmission mechanism 400. When the cover plate 300 rotates, the driven gear 405 is driven to rotate, and the driven gear 405 and the terminal 503 are slidably engaged. Therefore, when the driven gear 405 rotates, the terminal 503 also rotates accordingly. A threaded section 5012 is provided at the bottom end of the terminal 503. The threaded section 5012 is threadedly installed in a threaded hole 5015 on the mounting seat 5014. The mounting seat 5014 has a limiting effect on the terminal 503, and when the cover plate 300 is opened, the bottom end of the terminal 503 is still installed in the threaded hole 5015. Therefore, when the cover plate 300 is opened, the terminal 503 will not pop out under the action of the compression spring 505. After opening the cover plate 300 for inspection, the operator does not need to re-position the terminal 503, thereby increasing the practicality of the device.

[0043] Embodiment 3: This embodiment is intended to promote the solution of the problem that the wire pressing plate 502 simply presses the wire end on the wiring board 501, which is easy to cause the wire end to loosen and poor contact. This embodiment is an improvement made on the basis of embodiment 2. For details, please refer to Figure 1-12 A horizontal plate 508 is installed on the terminal 503, and a winding mechanism 600 is arranged on the horizontal plate 508. The winding mechanism 600 includes a first sleeve 601, the top of the first sleeve 601 is installed on the horizontal plate 508, a first spring 602 is arranged in the first sleeve 601, a first movable column 603 is slidably installed in the first sleeve 601, the top of the first movable column 603 contacts the bottom end of the first spring 602, a wire pressing block 604 is installed at the bottom of the first movable column 603, the wire pressing block 604 is arranged in an arch shape, a No. 2 rubber pad 605 is installed at the bottom of the wire pressing block 604, and the wire pressing block 604 is arranged opposite to the wire entry hole 103.

[0044] Please note that, please refer to Figure 5 , Figure 8 , Fig. 9 After the wire pressing block 604 presses the wire end, it will rotate with the terminal 503, and the wire pressing block 604 will drive the wire end to complete the winding. In order to prevent part of the wire harness in the wire end from overflowing from the gap between the wire pressing block 604 and the terminal board 501 during the winding process, this solution installs a second rubber pad 605 at the bottom end of the wire pressing block 604, so that the wire pressing block 604 and the terminal board 501 fit tightly. In addition, since the maximum downward displacement of the horizontal plate 508 is determined, in order to adapt to wire ends of different sizes, a first spring 602 is provided above the wire pressing block 604 to increase the practicality of the device.

[0045] A fixing sleeve 5013 is installed at the upper end of the terminal block 501. The fixing sleeve 5013 is arranged on the periphery of the terminal post 503. The wound wire ends will be rolled on the fixing sleeve to prevent the wire ends from being pulled into the key slot 406 and causing blockage when the terminal post 503 moves downward.

[0046] Also, please refer to Figure 5 , Figure 8 A second sleeve 509 is also installed on the horizontal plate 508, and a second spring 5010 is arranged in the second sleeve 509. The wire pressing plate 502 is arranged as an annular plate, and the inner diameter of the wire pressing plate 502 is equal to the outer diameter of the fixed sleeve 5013. A second movable column 5011 is installed on the upper end of the wire pressing plate 502. The second movable column 5011 is slidably installed in the second sleeve 509, and the top end of the second movable column 5011 contacts the bottom end of the second spring 5010.

[0047] A wire tube 701 is provided on the terminal block 501, one end of the wire tube 701 is connected to the wire entry hole 103, and the other end of the wire tube 701 is directly opposite to the wire pressing block 604, and the inner diameter of the wire entry port of the wire tube 701 is larger than the inner diameter of the wire outlet port. Because the wire ends are relatively loose before wiring, the wire tube 701 has a certain gathering effect on the wire ends, which makes it convenient for the wire pressing block 604 to completely press the wire ends. In addition, the wire tube 701 also has a guiding effect on the wire ends, so that when the wire ends are inserted into the housing 100, the wire ends are just located on one side of the wire pressing block 604.

[0048] In this embodiment: a horizontal plate 508 is installed on the terminal 503, and a winding mechanism 600 is installed on the horizontal plate 508. When the terminal 503 moves downward, the arched wire pressing block 604 will press the wire end. At the same time, the terminal 503 rotates, and the wire pressing block 604 pulls the wire end to rotate accordingly, and the wire end is rolled on the fixed sleeve 5013 and pressed by the pressing plate. Compared with the pressing plate directly pressing the wire end in the second embodiment, the wire end in this embodiment is wound and then pressed, which increases the contact area between the wire end and the terminal board 501, thereby preventing the wire end from loosening and poor wiring, and increasing the reliability of the device; Moreover, the wire pressing plate 502 is configured as an annular plate, and the inner diameter of the annular plate is equal to the outer diameter of the fixed sleeve 5013, thereby ensuring that the wire pressing plate 502 can move down smoothly and press the wire end. Since the displacement of the terminal 503 is fixed, a second spring 5010 is provided above the wire pressing plate 502. When the diameter of the wire end is relatively small, under the action of the second spring 5010, the wire pressing plate 502 can also press the wire end, thereby reducing the occurrence of loose wire ends and poor wiring, and further increasing the reliability of the device.

[0049] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An electric energy meter, comprising a housing (100) and a guide rail (200), wherein the housing (100) is slidably mounted on the guide rail (200), a pair of wire entry holes (103) are formed at one end of the housing (100), and a wiring hole (102) is formed at the top of the housing (100), characterized in that: A wiring board (501) for wiring is fixedly installed in the housing (100), a wire pressing mechanism (500) is arranged above the wiring board (501), the wire pressing mechanism (500) comprises a terminal (503), the terminal (503) is movably installed in the wiring hole (102), and the terminal (503) is inserted into the wiring board (501), a wire pressing plate (502) for wire pressing is arranged on the terminal (503), and a compression spring (505) is arranged inside the housing (100), and the compression spring (505) is clamped on the bottom end of the terminal (503); A cover plate (300) is rotatably mounted on the upper end of the housing (100), and the cover plate (300) is movably engaged with the housing (100). When the cover plate (300) is closed, the cover plate (300) contacts the terminal post (503) and drives the wire pressing plate (502) to press the wire end onto the terminal board (501).

2. The electric energy meter according to claim 1, characterized in that: The cover plate (300) is configured as a transparent plastic plate with an L-shaped cross section. A handle (301) is installed on the surface of the cover plate (300). A pair of wire clamping grooves (302) are provided at one end of the cover plate (300). Wire ends pass through the wire clamping grooves (302) and are clamped on the housing (100) by the wire clamping grooves (302). An observation hole (104) is also provided at one end of the housing (100), and the observation hole (104) is arranged adjacent to the wire entry hole (103).

3. The electric energy meter according to claim 1, characterized in that: A pressing block (506) is installed at the top of the terminal post (503), the pressing block (506) is configured as a circular plate, and a No. 1 rubber pad (507) is installed on the pressing block (506); A limit block (504) is installed at the bottom of the terminal post (503), and the upper end of the compression spring (505) is in conflict with the bottom end of the limit block (504).

4. The electric energy meter according to claim 1, characterized in that: A mounting seat (5014) is provided in the housing (100), the bottom end of the compression spring (505) is mounted on the mounting seat (5014), a threaded hole (5015) is provided at the top end of the mounting seat (5014), a threaded section (5012) is provided at the bottom end of the terminal (503), and the threaded section (5012) is rotatably mounted in the threaded hole (5015); A driven gear (405) is rotatably mounted on the bottom end of the terminal block (501); the driven gear (405) is transmission-connected to the cover plate (300) via a transmission mechanism (400); a key slot (406) is provided on the driven gear (405); a key block (5016) is mounted on one side of the terminal post (503); the key block (5016) is slidably engaged with the key slot (406).

5. The electric energy meter according to claim 4, characterized in that: A rotating shaft (303) is fixedly mounted on the hinged end of the cover plate (300), the rotating shaft (303) being rotatably mounted on the housing (100), first bevel gears (304) being mounted on both ends of the rotating shaft (303), and the first bevel gear (304) being transmission-connected to the driven gear (405) via the transmission mechanism (400).

6. The electric energy meter according to claim 5, characterized in that: The transmission mechanism (400) comprises a rotating rod (401), the rotating rod (401) being rotatably mounted inside the housing (100), a second bevel gear (402) being mounted on one end of the rotating rod (401), the second bevel gear (402) being meshed with the first bevel gear (304); A driving gear (403) is installed at the other end of the rotating rod (401), and a transmission gear (404) is rotatably installed inside the housing (100). The transmission gear (404) meshes with the driving gear (403), and the transmission gear (404) also meshes with the driven gear (405).

7. The electric energy meter according to claim 1, characterized in that: A transverse plate (508) is mounted on the terminal post (503), a wire winding mechanism (600) is arranged on the transverse plate (508), the wire winding mechanism (600) comprises a first sleeve (601), the first sleeve (601) is mounted on the transverse plate (508), a first spring (602) is arranged in the first sleeve (601), a first movable column (603) is slidably mounted in the first sleeve (601), the top end of the first movable column (603) contacts the bottom end of the first spring (602), a wire pressing block (604) is mounted at the bottom of the first movable column (603), the wire pressing block (604) is arranged in an arch shape, and a No. 2 rubber pad (605) is mounted at the bottom end of the wire pressing block (604); When not in use, the wire pressing block (604) is arranged corresponding to the wire entry hole (103).

8. The electric energy meter according to claim 7, characterized in that: A fixing sleeve (5013) is installed at the upper end of the wiring board (501), and the fixing sleeve (5013) is arranged on the periphery of the wiring post (503).

9. The electric energy meter according to claim 7, characterized in that: A second sleeve (509) is also mounted on the transverse plate (508), and a second spring (5010) is disposed inside the second sleeve (509); The wire pressing plate (502) is configured as an annular plate, and the inner diameter of the wire pressing plate (502) is equal to the outer diameter of the fixed sleeve (5013). A second movable column (5011) is installed at the upper end of the wire pressing plate (502). The second movable column (5011) is slidably installed in the second sleeve (509), and the top end of the second movable column (5011) contacts the bottom end of the second spring (5010).

10. The electric energy meter according to claim 7, characterized in that: A wire tube (701) is provided on the wiring board (501), one end of the wire tube (701) is connected to the wire entry hole (103), the other end of the wire tube (701) is directly opposite to the wire pressing block (604), and the inner diameter of the wire entry opening of the wire tube (701) is larger than the inner diameter of the wire outlet opening.

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