Ammeter terminal seat
By employing a positioning slot and positioning pin structure in the meter terminal block, along with an anti-dislodgement spring clip, the problem of conductive foot shifting in narrow spaces is solved, achieving stable conductivity and safe operation of the meter, and enhancing the meter's reliability and durability.
Patent Information
- Application Number
- CN202422211839.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-10
- Publication Date
- 2025-10-24
- Estimated Expiration
- 2034-09-10
AI Technical Summary
The conductive pins of existing electricity meter terminal blocks are prone to displacement due to excessive force in narrow operating spaces, affecting the stability and safety of electrical connections, causing the electricity meter to malfunction or even be damaged.
The conductive feet are fixed by a pin structure with positioning slots and positioning pins. Combined with anti-drop spring clips and manganese copper shunts, the conductive feet remain stable even when the screws are not fully tightened, thus enhancing the structural stability and safety of the meter terminal block.
It improves the stability and anti-interference ability of the conductive pins, ensures the conductivity and long-term stability of the meter during wiring, avoids meter damage caused by screw loosening or displacement, and improves work efficiency and safety.
Smart Images
Figure CN223471077U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to instrument technology, in particular to an electric meter terminal seat. Background Art
[0002] An electric meter is an instrument used to measure electrical energy. Also known as a watt-hour meter, energy meter, or kilowatt-hour meter, it refers to any instrument that measures various electrical quantities. The meter terminal block is a key component of the meter, providing the electrical connection point for the meter, allowing wires to be safely and reliably connected to the meter for energy measurement. Terminal blocks are typically constructed of insulating material and conductive contacts. High-quality terminal blocks are crucial to ensuring accurate measurement, long-term stability, and electrical safety.
[0003] The meter terminal block consists of several key components, among which the conductive contacts, such as the conductive pins, are the actual connection points for the wires and are responsible for transmitting electrical energy. During the meter wiring process, workers need to accurately insert the wires into the wiring holes and then tighten the terminal's fastening screws to ensure a stable and effective electrical connection between the wires and the conductive pins in the wiring holes. Inserting the wires usually requires the assistance of a screwdriver, and before operation, ensure that the fastening screws are completely loose to facilitate the insertion of the wires.
[0004] However, the existing technology does not provide a good way to fix the conductive pins. In a narrow operating space, workers may accidentally use too much force when tightening screws due to space limitations. This may cause the screwdriver to hit the conductive pins, thereby shifting the pins and affecting their conductivity. Once the conductive pins are displaced, the terminal block of the meter will lose its conductive function, causing the meter to malfunction and even damage the meter. To solve this problem, it is necessary to improve the fixing mechanism of the conductive pins to enhance their stability and anti-interference ability during the wiring process. Utility Model Content
[0005] In view of the above-mentioned defects of the prior art, the present invention provides an electric meter terminal block having a more stable conductive pin structure, which can reduce the risk of displacement of the conductive pin during wiring.
[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the present utility model is:
[0007] A terminal seat for an electric meter includes a terminal cover, an insulating seat connected to the terminal cover, and a conductive leg arranged in the insulating seat, wherein the terminal cover includes a positioning pin; the insulating seat includes a positioning notch for the conductive leg to pass through and be fixed; the slot shape of the positioning notch is adapted to the shape of one end of the conductive leg; the positioning notch is provided with a first pin hole; the conductive leg is provided with a second pin hole; the positioning pin passes through the first pin hole and the second pin hole in sequence.
[0008] The conductive leg is positioned by the positioning slot, and the conductive leg is limited by the side wall of the positioning slot, so that the activity gap is very small, and the conductive leg is in a relatively close and connected state, and loose shaking is avoided. In order to prevent the conductive leg from falling off from the positioning slot, the positioning pin is matched with the pin hole one and the pin hole two, so that the conductive leg is fixed. The terminal cover and the insulating seat are fixedly connected after assembly, so that the positioning pin cannot be accidentally pulled out of the pin hole one and the pin hole two when the ammeter is connected, and the structural stability and safety of the entire ammeter terminal seat are further enhanced.
[0009] In summary, the utility model can keep the conductive leg fixed when the terminal fastening screw is not completely screwed in, realizes stable conductivity and high reliability during connection, and provides a strong guarantee for safe operation and long-term stability of the ammeter.
[0010] As preferred, the positioning pin is on a straight line with two pin hole ones; the positioning pin passes through the positioning slot through the two pin hole ones.
[0011] Compared with the positioning pin passing through only one pin hole one and pin hole two, the positioning pin passing through another pin hole one can stabilize the bolt structure of the positioning pin and the positioning slot, and further increase the stability of the conductive leg.
[0012] As preferred, the terminal cover and the insulating seat are connected to form a cavity, and a terminal part is arranged in the cavity; the terminal part comprises terminal groups, each terminal group comprises a terminal sleeve and a terminal fastening screw screwed with the terminal sleeve; and the conductive leg extends into the terminal sleeve.
[0013] The terminal part comprises a plurality of terminal groups, and each terminal can be one terminal or a pair of terminals. The terminal fastening screw is slowly screwed into the terminal sleeve, the position of the terminal fastening screw relative to the terminal cover is unchanged, the terminal sleeve slowly rises, the wire accommodating space formed by the terminal sleeve and the conductive leg becomes smaller and smaller because the conductive leg is fixed, and the wire is clamped by the terminal sleeve and the conductive leg.
[0014] As preferred, a protrusion for pressing the wire is arranged in the terminal sleeve.
[0015] The protrusion can further clamp the wire by increasing the friction between the wire and the terminal sleeve.
[0016] As preferred, a loop is formed by the conductive leg and a conductive element; the loop comprises a first loop and a second loop; the conductive elements of the first loop and the second loop are not at the same height position; and a connection end one of the first loop and a connection end two of the second loop are arranged in opposite directions.
[0017] The advantage of this is to meet the creepage distance requirements of the first loop and the second loop. The creepage distance refers to the radius of the electrified zone between two conductive components measured along the insulating surface, which is caused by the polarization of the insulating material around the conductor in different use cases. By setting the wiring ends of the two loops in opposite directions and keeping the conductive elements of the two loops at a distance, the creepage distance of the two loops can be maximized to ensure electrical safety.
[0018] As a preferred, the terminal groups are symmetrically distributed with the central plane of the insulating seat length direction as the symmetry plane; and each two symmetrically distributed terminal groups are connected to form one loop.
[0019] The utility model discloses preferably six terminal groups in the terminal part, and the symmetric terminal groups are connected to form one loop through the conductive foot piece and the conductive element. Specifically, terminal group one and terminal group six are two symmetric terminal groups, and are connected to form the first loop. Terminal group two and terminal group five are two symmetric terminal groups, and are connected to form the second loop. The advantage of this is that the design of the symmetric terminal groups simplifies the installation process of the electric meter, makes the wiring more intuitive and convenient, and is convenient for maintenance personnel to troubleshoot and daily maintenance.
[0020] As a preferred, the loop further includes a third loop for connecting the neutral line of the power grid; and the two conductive foot pieces in the two terminal sleeves of the third loop are fixedly connected.
[0021] In actual use, terminal group three and terminal group four are two symmetric terminal groups, and are connected to form the third loop. The first loop and the second loop are two phases of the electric meter circuit, and the third loop is the N phase of the electric meter, which is used for connecting the neutral line of the power grid, is usually equal to the ground potential, provides a closed path of the loop, and ensures that the current can flow smoothly. The two conductive foot pieces in the two terminal sleeves of the third loop are fixedly connected to form the N phase loop, and the advantage of this is that it is not necessary to additionally connect the conductive element to the conductive foot piece to constitute the N phase loop, the space of the insulating seat is saved, the conductive elements on the insulating seat are prevented from being too crowded, and circuit leakage or short circuit faults are avoided.
[0022] As a preferred, the positioning pin includes a reinforcing rib outwardly protruding.
[0023] The reinforcing rib is used for improving the rigidity and strength of the whole positioning pin, and can effectively enhance the stability and durability of the positioning pin and even the whole terminal cover.
[0024] As a preferred, the terminal cover is provided with an anti-falling snap buckle for preventing the terminal fastening screw from being separated.
[0025] The anti-falling elastic buckle prevents the terminal fastening screw from falling off the terminal cover when the terminal fastening screw is not completely screwed in. When the worker connects electricity, the terminal fastening screw in a completely loose state is easy to fall off and then lost, which causes the connection operation to be unable to be completed. The anti-falling elastic buckle forms an arc-shaped blocking surface on both sides of the terminal fastening screw, and has a certain height in the vertical direction, thereby effectively preventing the terminal fastening screw from falling off.
[0026] As a preference, the conductive element is a manganese-copper shunt.
[0027] The manganese-copper shunt is used for current sampling of an electric meter, is usually made of manganese-copper alloy, and has a low temperature coefficient and a small inductance, which helps to improve the accuracy and stability of sampling. The working principle of the manganese-copper shunt is the prior art.
[0028] Compared with the prior art, the utility model has the beneficial effects that:
[0029] 1. The bolt structure of the positioning pin and the positioning notch is adopted, so that the conductive leg piece can be stably positioned even when the terminal fastening screw is not completely screwed in. Not only is the conductive performance in the wiring process optimized, but also the overall reliability is greatly improved, so that the stability and safety of the electric meter in long-time operation are ensured.
[0030] 2. The anti-falling elastic buckle is adopted, which forms an arc-shaped blocking surface on both sides of the terminal fastening screw, cooperates with the appropriate height in the vertical direction, effectively avoids the falling off of the screw, and ensures the close connection between the terminal fastening screw and the terminal cover. The anti-falling elastic buckle not only improves the work efficiency and avoids the delay of the operation caused by the loss of the terminal fastening screw, but also greatly enhances the structural stability and safety of the entire electric meter terminal seat.
[0031] 3. The manganese-copper shunt is used as the conductive element, so that one application of current sampling can be added. The manganese-copper shunt has the advantages of small device size, convenient installation, and low material cost when used for current sampling. BRIEF DESCRIPTION OF DRAWINGS
[0032] Figure 1 is a front view of embodiment 1;
[0033] Figure 2 is a sectional view of embodiment 1;
[0034] Figure 3 is a structural schematic view of the terminal cover of embodiment 1;
[0035] Figure 4 is a structural schematic view of the insulating seat of embodiment 1;
[0036] Figure 5 is a structural schematic view of the conductive leg piece of embodiment 1;
[0037] Figure 6 is a structural schematic diagram of the terminal part of Example 1;
[0038] Figure 7 is a structural schematic diagram of Example 1.
[0039] wherein:
[0040] 1, terminal cover; 2, insulating base; 3, conductive tab; 4, terminal part; 5, conductive element; 6, first loop; 7, second loop; 8, third loop;
[0041] 11, positioning pin; 12, anti-falling snap; 21, positioning notch; 31, pin hole two; 41, terminal sleeve; 42, terminal fastening screw; 61, terminal one; 71, terminal two;
[0042] 111, reinforcing rib; 211, pin hole one; 411, protrusion;
[0043] 101, terminal group one; 102, terminal group two; 103, terminal group three; 104, terminal group four; 105, terminal group five; 106, terminal group six. DETAILED DESCRIPTION
[0044] In order to make the technical means, creative features, purposes and effects achieved by the utility model easy to understand, the utility model is further described in combination with specific drawings. However, the utility model is not limited to the following examples.
[0045] It should be understood that the structures, proportions, sizes, etc. shown in the drawings attached to the present specification are only used to cooperate with the content disclosed in the specification for understanding and reading by those skilled in the art, and do not define the limiting conditions under which the utility model can be implemented, so they do not have technical substantive significance. Any modification of structure, change of proportion relationship or adjustment of size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model.
[0046] Example 1:
[0047] As Figure 1 , Figure 2The illustrated example of an electric meter terminal block includes a terminal cover 1, an insulating base 2 connected to the terminal cover 1, and a conductive leg 3 disposed within the insulating base 2. The insulating base 2 includes a positioning notch 21 for the conductive leg 3 to pass through and secure. The slot shape of the positioning notch 21 matches the shape of one end of the conductive leg 3. After the conductive leg 3 passes through the positioning notch 21, the positioning notch 21 matches the shape of one end of the conductive leg 3 and is constrained by the sidewalls of the positioning notch 21. This results in a very small clearance, resulting in a relatively tight fit and preventing looseness or shaking.
[0048] like Figure 3 As shown, the terminal cover 1 includes a positioning pin 11. Figure 4 As shown, there are two pin holes 211 on the straight line where the positioning pin 11 is located. Figure 5 As shown, the conductive leg 3 is provided with a second pin hole 31. The positioning pin 11 sequentially passes through the first pin hole 211, the second pin hole 31, the first pin hole 211, and the positioning notch 21, thereby securing the conductive leg 3. The positioning pin 11 includes an outwardly protruding reinforcing rib 111, which increases the overall rigidity and strength of the positioning pin, effectively enhancing the stability and durability of the positioning pin 11 and the entire terminal cover 1.
[0049] The terminal cover 1 and the insulating base 2 are fixedly connected after assembly. Therefore, when connecting the meter, the positioning pin 11 will not be accidentally withdrawn from the first pin hole 211 and the second pin hole 31, further enhancing the structural stability and safety of the entire meter terminal base. The utility model can keep the conductive pin 3 fixed even when the terminal fastening screw is not fully screwed in. The meter terminal base achieves stable conductivity and high reliability during wiring, providing a strong guarantee for the safe operation and long-term stability of the meter.
[0050] like Figure 2 、 Figure 6 As shown, the terminal cover 1 and the insulating base 2 are connected to form a cavity, which is provided with a terminal portion 4. The terminal portion 4 includes multiple terminal groups, preferably six terminal groups in this embodiment. Each terminal group includes a terminal sleeve 41 and a terminal fastening screw 42 threadedly connected to the terminal sleeve 41. The conductive pin 3 extends into the terminal sleeve 41. Each terminal group can be a single terminal or a terminal pair. In this embodiment, each terminal group preferably comprises a terminal pair having two terminal sleeves 41 and two terminal fastening screws 42.
[0051] When connecting the wire, the wire is stretched into the terminal sleeve 41 between the terminal sleeve 41 and the conductive tab 3. The terminal fastening screw 42 is slowly screwed into the terminal sleeve 41, the position of the terminal fastening screw 42 relative to the terminal cover 1 does not change, the terminal sleeve 41 slowly rises, because the conductive tab 3 is fixed, the wire containing space formed by the terminal sleeve 41 and the conductive tab 3 becomes smaller and smaller, until the wire is clamped by the terminal sleeve 41 and the conductive tab 3. The terminal sleeve 41 is provided with a protrusion 411 for pressing the wire, which is used to increase the friction between the wire and the terminal sleeve 41 to further clamp the wire. The terminal cover 1 is provided with an anti-falling snap 12 for preventing the terminal fastening screw 42 from falling off, which prevents the terminal fastening screw 42 from falling off the terminal cover 1 when it is not completely screwed in.
[0052] As shown in Figure 7 The meter terminal block includes a loop formed by the conductive tab 3 and the conductive element 5. In this embodiment, the conductive element 5 is a manganese copper shunt for current sampling of the meter. Preferably, the terminal groups are symmetrically distributed with the central plane of the insulating base 2 as the symmetry plane; every two symmetrically distributed terminal groups are connected to form a loop. Specifically, terminal group one 101 and terminal group six 106 are two symmetrically distributed terminal groups, connected to form a first loop 6. Terminal group two 102 and terminal group five 105 are two symmetrically distributed terminal groups, connected to form a second loop 7. Terminal group three 103 and terminal group four 104 are two symmetrically distributed terminal groups, connected to form a third loop 8. In actual use, terminal group one 101 and terminal group two 102 are used to connect the fire wire, and terminal group three 103 is used to connect the neutral line of the power grid. Therefore, the meter terminal block has two-phase electricity, the first loop 6 and the second loop 7 are two phases of the meter circuit, and the third loop 8 is the N phase of the meter terminal block.
[0053] The conductive elements 5 of the first loop 6 and the second loop 7 are not at the same height position, and the connection end one 61 of the first loop 6 and the connection end two 71 of the second loop 7 are opened in opposite directions. The advantage of this is to meet the creepage distance requirement of the first loop 6 and the second loop 7. Keeping the conductive elements 5 of the two loops at a certain distance can maximize the creepage distance of the two loops and ensure electrical safety.
[0054] The two conductive tabs 3 in the two terminal sleeves 41 of the third loop 8 are fixedly connected. The advantage of this is that there is no need to additionally connect the conductive element 5 to the conductive tab 3 to form the N phase loop, saving space on the insulating base 2, avoiding overcrowding of the conductive elements on the insulating base 2, and causing circuit leakage or short circuit failure.
Claims
1. An electric meter terminal block comprising a terminal cover (1), an insulating base (2) connected to the terminal cover (1), and a conductive lug (3) provided in the insulating base (2), characterized in that, The terminal cover (1) comprises a positioning pin (11); the insulating base (2) comprises a positioning notch (21) for the conductive pin (3) to pass through and be fixed; the opening shape of the positioning notch (21) is adapted to the shape of one end of the conductive pin (3); the positioning notch (21) is provided with a pin hole one (211); the conductive pin (3) is provided with a pin hole two (31); the positioning pin (11) passes through the pin hole one (211) and the pin hole two (31) in sequence.
2. The meter terminal block of claim 1, wherein, There are two pin hole ones (211) on the straight line where the positioning pin (11) is located; the positioning pin (11) penetrates the positioning notch (21) through the two pin hole ones (211).
3. The meter terminal block of claim 1, wherein The terminal cover (1) and the insulating base (2) are connected to form a cavity, and a terminal part (4) is arranged in the cavity; the terminal part (4) comprises a terminal group, each terminal group comprises a terminal sleeve (41) and a terminal fastening screw (42) screwed with the terminal sleeve (41); the conductive pin (3) extends into the terminal sleeve (41).
4. The meter terminal block of claim 3, wherein, The terminal sleeve (41) is provided with a protrusion (411) for pressing the wire.
5. The meter terminal block of claim 3, wherein, The circuit comprises a conductive element (5) connected by the conductive pin (3); the circuit comprises a first circuit (6) and a second circuit (7); the conductive element (5) of the first circuit (6) and the second circuit (7) is not at the same height position; the wiring end one (61) of the first circuit (6) and the wiring end two (71) of the second circuit (7) are provided in opposite directions.
6. The meter terminal block of claim 5, wherein, The terminal group is symmetrically distributed with the central plane of the length direction of the insulating base (2) as the symmetry plane; every two symmetrically distributed terminal groups are connected to form a circuit.
7. The meter terminal block of claim 6, wherein, The circuit further comprises a third circuit (8) for connecting the neutral line of the power grid; two conductive pins (3) in two terminal sleeves (41) of the third circuit (8) are fixedly connected.
8. The meter terminal block of claim 1, wherein, The positioning pin (11) comprises an outward protruding reinforcing rib (111).
9. The meter terminal block of claim 3, wherein, The terminal cover (1) is provided with an anti-falling snap (12) for preventing the terminal fastening screw (42) from falling off.
10. The meter terminal block of claim 5, wherein, The conductive element (5) is a manganese copper shunt.