A power meter with firm wiring

Abstract

The utility model belongs to electric energy meter technical field especially relates to a kind of electric energy meter of wiring stable, it includes: base;Wiring assembly, wiring assembly includes terminal block, wiring board and terminal screw;Upper cover, be provided with clamping slot, connecting hole and operating hole, clamping slot is along Z direction setting, connecting hole is along Y direction and is set through upper cover, operating hole is set in clamping slot and Y direction and is set through upper cover;Limiting clamping plate, limiting clamping plate and clamping slot are along Z direction and are inserted into joint and with terminal screw along Y direction and abut;Protective cover, hinged on upper cover for sealing connecting hole, protective cover still be provided with locating block;Limiting clamping plate is provided with locating hole, when protective cover seals connecting hole, locating block and locating hole are inserted into joint;The beneficial effects of the utility model are that by setting limiting clamping plate insertion clamping slot, the head of terminal screw is abutted, to realize the spin-off path of blocking terminal screw, effectively avoid terminal screw from loosening.

Description

Technical Field

[0001] This utility model belongs to the field of electricity meter technology, and in particular relates to an electricity meter with a stable wiring connection. Background Technology

[0002] Currently, most electricity meters on the market adopt a split shell structure with a base and a top cover assembled together. The top cover usually has an operating hole. The purpose of the operating hole is to expose the wiring screws of the wiring components inside the electricity meter, so that the staff can use a screwdriver to tighten the wiring screws, thereby driving the terminal block and the terminal board to move relative to each other, clamping and fixing the wires, and completing the wiring operation.

[0003] In existing technologies, most electricity meters are prone to loosening of fastening screws during long-term operation due to factors such as external vibration, temperature changes causing thermal expansion and contraction of wires, and gradual release of installation stress. This leads to a decrease in the clamping force of the wires, and in severe cases, it can cause the wires to loosen, power outages, and affect the normal operation of the electricity meter. Utility Model Content

[0004] The purpose of this utility model is to provide a reliable electricity meter with secure wiring to address the aforementioned technical problems.

[0005] In view of this, the present invention provides a power meter with a secure wiring, comprising: The base has a wiring chamber and a storage chamber inside. The wiring assembly includes a terminal block, a terminal board, and a wiring screw. The terminal block is disposed in the wiring chamber, the terminal board is disposed in the storage chamber and its end extends into the terminal block, and the wiring screw is threaded onto the terminal block to drive the terminal block and the terminal board to move closer to each other. The top cover has a slot, a connection hole and an operating hole. The slot is set along the Z direction, and the connection hole is set through the top cover along the Y direction. The connection hole is used to install fastening screws to connect the top cover and the base. The operating hole is set in the slot and is set through the top cover along the Y direction. The operating hole is used to connect with the wiring chamber so that the wiring screws are exposed. The limiting plate and the slot are inserted and engaged in the Z direction, and abut against the wiring screw in the Y direction; The protective cover is hinged to the upper cover to seal the connection hole, and the protective cover is also provided with a positioning block; The limiting plate has a positioning hole. When the protective cover seals the connection hole, the positioning block and the positioning hole are inserted and matched.

[0006] Furthermore, a limiting groove is also provided on the bottom of the card slot along the Y direction, and the limiting groove is set through the operating hole along the Z direction; The limit plate is also provided with a limit protrusion. The limit protrusion and the limit groove are inserted and matched along the Z direction, and the limit protrusion abuts against the wiring screw along the Y direction.

[0007] Furthermore, a positioning groove is provided in the card slot, which is located on both sides of the card slot along the X direction and is set along the Z direction; The limiting plate has positioning protrusions on both sides along the X direction that are adapted to and connected to the positioning groove.

[0008] Furthermore, the positioning block is an adsorption magnetic block, and a magnetic sheet is also provided on the upper cover; When the positioning block and the positioning hole are inserted and matched, the positioning block and the magnetic sheet are attracted and fixed.

[0009] Furthermore, grooves are also provided on the protective cover.

[0010] The beneficial effects of this utility model are: 1. By setting a limit plate to insert into the slot, the head of the wiring screw is abutted, thereby blocking the screw from turning back and effectively preventing the screw from loosening on its own.

[0011] 2. By setting a protective cover to seal the connection hole, dust and moisture can be prevented from entering the connection hole. At the same time, the positioning block and the positioning hole on the limit plate can be inserted and matched to limit the limit plate, preventing the limit plate from shifting and affecting the anti-loosening effect of the wiring screw. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of the electricity meter in this utility model; Figure 2 This is an exploded view of the structure of the upper cover in this utility model; Figure 3 This is a schematic diagram of the assembly structure of the upper cover and the limiting plate in this utility model; Figure 4 This is a schematic diagram of the structure of the protective cover when it is placed on the upper cover in this utility model; Figure 5 This is a partial structural cross-sectional view of the protective cover when it is placed on the upper cover in this utility model; The markings in the diagram are as follows: 1. Base; 11. Wiring chamber; 12. Storage chamber; 2. Wiring screw; 3. Top cover; 31. Slot; 32. Connection hole; 33. Operating hole; 34. Magnetic plate; 35. Positioning groove; 36. Limiting groove; 4. Limiting plate; 41. Positioning hole; 42. Positioning protrusion; 43. Limiting protrusion; 5. Protective cover; 51. Positioning block; 52. Groove. Detailed Implementation

[0013] The technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0014] In the description of this application, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0015] Example 1:

[0016] This embodiment provides a securely wired electricity meter, comprising: Base 1, with a wiring chamber 11 and a storage chamber 12 inside the base 1; The wiring assembly includes a terminal block, a terminal board, and a wiring screw 2. The terminal block is disposed in the wiring chamber 11, the terminal board is disposed in the storage chamber 12 and its end extends into the terminal block, and the wiring screw 2 is threaded onto the terminal block to drive the terminal block and the terminal board to move closer to each other. The upper cover 3 has a slot 31, a connecting hole 32 and an operating hole 33. The slot 31 is set along the Z direction, and the connecting hole 32 is set through the upper cover 3 along the Y direction. The connecting hole 32 is used to install fastening screws to connect the upper cover 3 and the base 1. The operating hole 33 is set in the slot 31 and is set through the upper cover 3 along the Y direction. The operating hole 33 is used to connect with the wiring chamber 11 so that the wiring screw 2 is exposed. Limiting plate 4, the limiting plate 4 and the slot 31 are inserted and engaged in the Z direction, and abut against the wiring screw 2 in the Y direction; The protective cover 5 is hinged to the upper cover 3 to seal the connecting hole 32. The protective cover 5 is also provided with a positioning block 51. The limiting plate 4 has a positioning hole 41. When the protective cover 5 seals the connecting hole 32, the positioning block 51 and the positioning hole 41 are inserted and engaged.

[0017] In this technical solution, the base 1, serving as the lower supporting structure of the electricity meter, is integrally injection molded from insulating material, providing installation space for internal electrical components and wiring structures. The terminal block, a component of the wiring assembly, provides an insertion point for external wires and a mounting base for the terminal screw 2, working with the terminal plate to clamp and fix the wires. The terminal plate, a conductive component of the wiring assembly, is a long, strip-shaped metal conductive plate. Its central portion is located within the housing chamber 12 and connects to the internal circuitry, while its two ends extend into the terminal block. Its function is to enable electrical conduction between the external wires and the internal circuitry of the electricity meter, while also serving as a support structure for wire clamping. The terminal screw 2, a clamping operating component of the wiring assembly, rotates to cause axial displacement of the terminal block, pressing the external wires onto the terminal plate to achieve mechanical fixation and electrical connection of the wires.

[0018] The upper cover 3 is the upper cover of the electricity meter, which seals the opening of the base 1. A slot 31 extending in the Z-direction is provided in the area of ​​the upper cover 3 corresponding to the wiring chamber 11. The opening of the slot 31 faces the upper end face of the upper cover 3. The internal contour of the slot matches the shape of the limiting plate 4, allowing the limiting plate 4 to be vertically inserted. A connecting hole 32 extending in the Y-direction is provided on the side wall of the upper cover 3. An internal threaded hole is provided on the side wall of the base 1 at the position corresponding to the connecting hole 32. A fastening screw can pass through the connecting hole 32 from the outside and be screwed into the internal threaded hole to lock the upper cover 3 and the base 1. An operating hole 33 extending in the Y-direction is provided on the side wall of the slot 31 facing the wiring chamber 11. The position of the operating hole 33 corresponds to the head position of the wiring screw 2, serving as a channel for the screwdriver to operate the wiring screw 2.

[0019] The function of the limiting plate 4 is to block the unscrewing path of the wiring screw 2 after it is inserted into the slot 31, so as to prevent the wiring screw 2 from loosening on its own and to prevent unauthorized personnel from operating the wiring screw 2 at will. Its whole is an insulating plate-shaped structure that is compatible with the slot 31 and can be inserted and removed vertically along the slot 31. At the same time, the limiting plate 4 is provided with a positioning hole 41, which can be used with the protective cover 5 to achieve operation locking.

[0020] A cylindrical hinge shaft is provided on one edge of the protective cover 5, and a hinge seat with a shaft hole is provided at the corresponding position of the upper cover 3. The hinge shaft is embedded in the shaft hole of the hinge seat, allowing the protective cover 5 to rotate around the axis of the hinge shaft, realizing the switching between open and closed states, and acting as a cover for the connection hole 32, thereby preventing dust and moisture from entering the connection hole 32. On the surface of the protective cover 5 facing the connection hole 32, a columnar positioning block 51 is provided. The shape of the positioning block 51 is adapted to the positioning hole 41 of the limiting plate 4. When the protective cover 5 is closed, the positioning block 51 is inserted into the positioning hole 41 to form an insertion fit, thereby limiting the limiting plate 4 in the Z direction.

[0021] Furthermore, a limiting groove 36 is provided on the bottom of the slot 31 along the Y direction, and the limiting groove 36 passes through the operating hole 33 along the Z direction; on the side wall of the slot 31 facing the wiring chamber 11, a limiting groove 36 extending along the Z direction is also provided, and the limiting groove 36 passes through the operating hole 33 along the Z direction to maintain communication. A limiting protrusion 43 is also provided on the limiting plate 4. When the limiting plate 4 is inserted into the slot 31, the limiting protrusion 43 and the limiting groove 36 are engaged along the Z direction, and the limiting protrusion 43 abuts against the wiring screw 2 along the Y direction, preventing the wiring screw 2 from being rotated outward.

[0022] Furthermore, a positioning groove 35 is provided within the slot 31, located on both sides of the slot 31 along the X direction and positioned along the Z direction. On the inner walls of both sides of the slot 31 along the transverse direction, a positioning groove 35 extending along the Z direction is provided, with the cross-section of the positioning groove 35 being a concave strip shape. Positioning protrusions 42, adapted to and connected to the positioning grooves 35, are provided on both sides of the limiting plate 4 along the X direction. When the limiting plate 4 is inserted into the slot 31, the positioning protrusions 42 and the positioning grooves 35 engage along the Z direction, providing X- and Y-direction limiting for the limiting plate 4 and preventing it from shaking.

[0023] After the electricity meter is assembled, when performing wiring operations, first open the protective cover 5. At this time, the positioning block 51 moves outward with the protective cover 5 and exits from the positioning hole 41 of the limit plate 4, releasing the vertical lock on the limit plate 4. Next, pull the limit plate 4 out along the slot 31, and the limit protrusion 43 exits from the area of ​​the operating hole 33. Then, use a screwdriver to loosen the wiring screw 2 through the operating hole 33, allowing the external wire to be inserted into the terminal block from the outside of the electricity meter. Finally, use a screwdriver to tighten the wiring screw 2 to complete the mechanical fixation and electrical connection of the wire.

[0024] After wiring is completed, insert the limiting plate 4 into the slot 31. The positioning protrusions 42 on both sides slide along the positioning groove 35 for guidance, and the inner limiting protrusion 43 moves along the limiting groove 36 until the limiting plate 4 is fully inserted. At this time, the limiting protrusion 43 abuts against the outer side of the head of the wiring screw 2, which plays a Y-direction limiting role for the wiring screw 2, preventing the wiring screw 2 from rotating outward due to vibration, thermal expansion and contraction, etc., and maintaining the tightness of the wiring. Then, flip the protective cover 5 inward to close it. The positioning block 51 moves with the protective cover 5 and inserts into the positioning hole 41 of the limiting plate 4, restricting the limiting plate 4 from being pulled upward. The protective cover 5 then seals the connection hole 32 to prevent external debris from entering the connection hole 32 and affecting the connection reliability of the fastening screw.

[0025] Example 2:

[0026] This embodiment provides a power meter with a secure wiring connection. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0027] Furthermore, the positioning block 51 is an adsorption magnetic block, and the upper cover 3 is also provided with a magnetic sheet 34; wherein, when the positioning block 51 and the positioning hole 41 are inserted and engaged, the positioning block 51 and the magnetic sheet 34 are adsorbed and fixed.

[0028] In this technical solution, the positioning block 51 can be an adsorption magnetic block. A thin magnetic sheet 34 is embedded in the upper cover 3 at the position where the positioning block 51 abuts. The surface of the magnetic sheet 34 is flush with the outer surface of the upper cover 3 and is used to cooperate with the adsorption magnetic block to fix the protective cover 5. This effectively enhances the stability of the protective cover 5 when it is closed, ensuring that the protective cover 5 will not easily shake or deflect.

[0029] Furthermore, a groove 52 is provided on the protective cover 5. On the outer surface of the protective cover 5 away from the hinge axis, a recessed groove 52 is provided. The contour of the groove 52 is adapted to the shape of the fingertip, which helps the operator to apply force to lift the protective cover 5, effectively improving the ease of operation.

[0030] The embodiments of this application have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A power meter with secure wiring, characterized in that, include: The base (1) has a wiring chamber (11) and a storage chamber (12) inside. The wiring assembly includes a terminal block, a terminal board, and a wiring screw (2). The terminal block is disposed in the wiring chamber (11), the terminal board is disposed in the storage chamber (12) and its end extends into the terminal block, and the wiring screw (2) is threaded onto the terminal block to drive the terminal block and the terminal board to move closer to each other. The upper cover (3) has a slot (31), a connecting hole (32) and an operating hole (33). The slot (31) is set along the Z direction, and the connecting hole (32) is set through the upper cover (3) along the Y direction. The connecting hole (32) is used to install fastening screws to connect the upper cover (3) and the base (1). The operating hole (33) is set in the slot (31) and is set through the upper cover (3) along the Y direction. The operating hole (33) is used to connect with the wiring chamber (11) so that the wiring screw (2) is exposed. The limiting plate (4) and the slot (31) are inserted and fitted in the Z direction, and abut against the wiring screw (2) in the Y direction; A protective cover (5) is hinged to the upper cover (3) for sealing the connection hole (32). A positioning block (51) is also provided on the protective cover (5). The limiting plate (4) has a positioning hole (41). When the protective cover (5) seals the connecting hole (32), the positioning block (51) and the positioning hole (41) are inserted and engaged.

2. The electricity meter with secure wiring according to claim 1, characterized in that, A limiting groove (36) is also provided on the bottom of the card slot (31) along the Y direction, and the limiting groove (36) is provided to pass through the operation hole (33) along the Z direction; The limiting plate (4) is also provided with a limiting protrusion (43), the limiting protrusion (43) and the limiting groove (36) are inserted and matched along the Z direction, and the limiting protrusion (43) abuts against the wiring screw (2) along the Y direction.

3. The electricity meter with secure wiring according to claim 1, characterized in that, The card slot (31) is provided with a positioning groove (35), which is located on both sides of the card slot (31) along the X direction and along the Z direction; The limiting plate (4) is provided with positioning protrusions (42) on both sides along the X direction, which are adapted to and connected to the positioning groove (35).

4. A securely wired energy meter according to claim 1, characterized in that, The positioning block (51) is an adsorption magnetic block, and the upper cover (3) is also provided with a magnetic sheet (34). When the positioning block (51) and the positioning hole (41) are inserted and engaged, the positioning block (51) and the magnetic sheet (34) are attracted and fixed.

5. A securely wired energy meter according to claim 1, characterized in that, The protective cover (5) is also provided with a groove (52).

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