Single-phase symmetrical terminal seat

Abstract

The invention relates to a single-phase symmetrical terminal seat, which comprises a terminal seat body, a current binding post, a sampling protection assembly and a wiring connecting piece, and is characterized in that the terminal seat body is provided with a plurality of mounting holes for pressing the current binding post, the plurality of mounting holes are symmetrically arranged along the central axis of the terminal seat body, and the terminal seat body is a symmetrical body; the current binding post is pressed into the mounting hole; a mounting groove for mounting the sampling protection assembly is formed in the center of the terminal seat body; the wiring connecting piece is used for connecting the current binding post and a wire. The symmetrical terminal seat is ingenious in structure, the terminal seat body, the current binding post, the sampling protection assembly and the wiring connecting piece are arranged, the terminal seat body is a symmetrical body, so that the terminal seat has better balance and stability on the mechanical structure of an electrical connection box, and the pressing-in type current binding post is adopted, so that the safety of the electrical connection box is improved. The terminal seat is more convenient to install, and the installation speed is improved; the sampling protection assembly can effectively protect the circuit and improve the sampling precision at the same time.

Description

Technical Field

[0001] This invention belongs to the field of electrical connector technology, specifically relating to connection components in electrical equipment for achieving reliable connections between wires, and in particular a single-phase symmetrical terminal block. Background Technology

[0002] A terminal block is a component used to fix and connect electrical terminals, typically for connecting, branching, and relaying wires. It plays a crucial connection role in electrical equipment, ensuring the stable transmission of current or signals.

[0003] Existing terminal blocks typically employ a one-piece, sealed housing structure. This design is difficult to install in confined spaces, and repairs are challenging in case of malfunction. Furthermore, existing terminal blocks come in a variety of shapes and types, complicating component management, impacting installation efficiency, and consequently affecting the user experience. This hinders the widespread adoption and application of these terminal blocks in the field of electrical connector technology. Summary of the Invention

[0004] In order to overcome the defects in the prior art, the present invention aims to provide a single-phase symmetrical terminal block with a simple and ingenious structure, convenient installation, effective guarantee of stability during installation and use, easy inspection and maintenance, improved user experience, and conducive to the promotion and application of the single-phase symmetrical terminal block in the field of electrical connector technology.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: a single-phase symmetrical terminal block, comprising a terminal block body, current terminals, a sampling protection component, and a wiring connector. The terminal block body has mounting holes for pressing the current terminals into, and there are multiple mounting holes symmetrically arranged along the central axis of the terminal block body, making the terminal block body a symmetrical body. The current terminals are used to press into the mounting holes. A mounting groove for mounting the sampling protection component is formed at the center of the terminal block body. The wiring connector is used to connect the current terminals to an electrical wire.

[0006] In a preferred embodiment of the present invention, the mounting hole extends inward from the top of the terminal block and communicates with the side of the terminal block, and the wiring connector extends inward from the side of the mounting hole and is perpendicular to the current terminal.

[0007] In a preferred embodiment of the present invention, the current terminal includes a terminal body and a terminal connection portion. The terminal body has an arc-shaped cross-section, and the terminal connection portion has a rectangular cross-section. The terminal connection portion and the terminal body are integrally formed. The shape of the mounting hole is adapted to the shape of the current terminal.

[0008] As a preferred embodiment of the present invention, the terminal connection portion is provided with a terminal connection hole for connection with the terminal connector.

[0009] As a preferred embodiment of the present invention, the top of the current terminal is integrally formed with a terminal operating part, which is located outside the mounting hole.

[0010] In a preferred embodiment of the present invention, the sampling protection component includes a current transformer, a live wire current terminal block, and a neutral wire current terminal block. The current transformer is used to install in the mounting slot. The current transformer has a DC-resistant core and a non-DC-resistant core. The live wire current terminal block passes through the DC-resistant core and connects to the two current terminals located on the outer side. The neutral wire current terminal block passes through the non-DC-resistant core and connects to the two current terminals located on the inner side.

[0011] As a preferred embodiment of the present invention, the current transformer further includes a current transformer housing and a current transformer cover, which are detachably connected. The DC-resistant iron core and the non-DC-resistant iron core are both located inside the current transformer housing. The current transformer also has a live wire connection hole for the live wire current terminal piece to pass through and a neutral wire connection hole for the neutral wire current terminal piece to pass through.

[0012] As a preferred embodiment of the present invention, both the live wire connection hole and the neutral wire connection hole are arranged in a cross shape.

[0013] As a preferred embodiment of the present invention, the wiring connector is a wiring screw.

[0014] In a preferred embodiment of the present invention, the current terminal is made of copper; the terminal body is made of insulating material.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: The single-phase symmetrical terminal block of the present invention has an ingenious structure and fewer components. By setting the terminal block body, current terminals, sampling protection components and wiring connectors, and by making the terminal block body symmetrical, the terminal block has better balance and stability in the mechanical structure of the electrical connection box. Furthermore, the present invention uses press-in current terminals, which makes the terminal block easier to install and improves the installation speed. The sampling protection components can effectively protect the circuit while improving sampling accuracy and improving the user experience, which is conducive to the promotion and application of the above-mentioned single-phase symmetrical terminal block in the field of electrical connector technology.

[0016] Furthermore, the sampling protection component in this invention includes a current transformer, a live wire current terminal, and a neutral wire current terminal. This integrates the current transformers for both the live and neutral wires into a single unit, improving the stability of the current transformer during installation and use while maximizing the reduction of the distance between the two loop coils. This minimizes the overall size of the current transformer, facilitating the installation and use of the terminals within the instrument and improving the user experience. Simultaneously, by employing the aforementioned dual-channel current transformer solution, the sampling accuracy of the instrument can be further improved, meeting user needs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a single-phase symmetrical terminal block in one embodiment; Figure 2 This is a partial structural schematic diagram of a single-phase symmetrical terminal block in one embodiment; Figure 3 This is a schematic diagram of the terminal block structure in the embodiment; Figure 4 This is a schematic diagram of the current terminal block in the embodiment; Figure 5 This is a schematic diagram of the current transformer in the embodiment.

[0018] Reference numerals in the attached drawings: 1. Terminal base; 1-1. Mounting hole; 1-2. Mounting groove; 2. Current terminal; 2-1. Terminal body; 2-2. Terminal connection part; 2-3. Terminal connection hole; 2-4. Terminal operation part; 3. Current transformer; 3-1. DC-resistant core; 3-2. Non-DC-resistant core; 3-3. Current transformer housing; 3-4. Current transformer cover; 3-5. Live wire connection hole; 3-6. Neutral wire connection hole; 4. Live wire current terminal piece; 5. Neutral wire current terminal piece; 6. Wiring connector; 7. Wiring pin. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0020] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0021] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0022] Example: Figures 1 to 5 As shown, a single-phase symmetrical terminal block is suitable for current measurement and protection in single-phase circuits. It mainly consists of a terminal block body 1, current terminals 2 for connecting wires in the circuit, a sampling and protection component for measuring current in the circuit, and wiring connectors 6. The terminal block body 1 is the main structure of the entire terminal block, used to support and fix other components, while providing electrical insulation to ensure safety during use. In this embodiment, the terminal block body 1 has mounting holes 1-1 for pressing the current terminals 2 into. Multiple mounting holes 1-1 are symmetrically arranged along the central axis of the terminal block body 1, making the terminal block 1 a symmetrical body. This makes the terminal block more balanced and stable in terms of electrical connection and mechanical structure, while reducing installation difficulty. The current terminals 2 are pressed into the mounting holes 1-1, which reduces installation difficulty and ensures the secure fixing of the current terminals 2 and the reliability of the electrical connection. In this embodiment, a mounting groove 1-2 for installing the sampling protection component is formed at the center of the terminal block 1, allowing the sampling protection component to be tightly integrated into the terminal block 1. This improves the overall compactness and reliability of the terminal block, reduces its space occupation, and expands its application rate. The wiring connector 6 is used to connect the current terminal 2 to the wire, i.e., the conductor, to ensure the stability and reliability of the electrical connection. The wiring connector 6 typically uses screws, nuts, or snap rings to securely connect the wire to the current terminal 2, ensuring unobstructed circuitry and fulfilling the function of the terminal block.

[0023] In this embodiment, the mounting hole 1-1 extends inward from the top of the terminal block 1 and communicates with the side of the terminal block 1. That is, the mounting hole 1-1 has an opening not only at the top of the terminal block 1 but also on its side, forming an "L"-shaped mounting channel. The top opening allows the current terminal 2 to be pressed into the mounting hole 1-1 from above. This press-in installation method is simple and quick, facilitating on-site operation and greatly improving installation efficiency. The side opening provides an installation path for the wiring connector 6, allowing it to be inserted from the side and connected to the current terminal 2. This design not only saves space but also improves connection stability. The wiring connector 6 passes inward from the side of the mounting hole 1-1 and is perpendicular to the current terminal 2, ensuring the wiring connector 6 is firmly fixed to the current terminal 2 while maintaining a perpendicular relationship. This vertical connection effectively reduces bending stress on the wires, improves connection reliability, and also helps reduce electromagnetic interference between wires. In this embodiment, by designing the mounting hole 1-1 as a structure with the top and side connected, the overall volume of the terminal block can be made more compact, saving space and thus improving its convenience during installation and use.

[0024] Specifically, in this embodiment, the current terminal 2 includes a terminal body 2-1 and a terminal connection part 2-2. The terminal body 2-1 has an arc-shaped cross-section, and the terminal connection part 2-2 has a rectangular cross-section. The shape of the mounting hole 1-1 is adapted to the shape of the current terminal 2, that is, the mounting hole 1-1 is also formed by combining an arc shape and a rectangle. This design can quickly position the current terminal 2 and also limit the current terminal 2, preventing it from causing adverse consequences such as pulling on the wires due to rotation during installation and use, thus ensuring the stability of the current terminal 2 during installation and use. In addition, the rectangular cross-section design allows the terminal connection part 2-2 to better cooperate with the wiring connector 6, ensuring the firmness of the mechanical connection, providing a larger contact area, and effectively reducing loosening caused by vibration or external force. In this embodiment, the terminal connection portion 2-2 and the terminal body 2-1 are integrally molded, which improves the overall mechanical strength of the current terminal 2, reduces potential weaknesses caused by welding or splicing, reduces contact resistance between components, and improves the reliability of the electrical connection. The integral molding design also improves the durability of the current terminal 2 and extends its service life. In this embodiment, the terminal connection portion 2-2 is provided with a terminal connection hole 2-3 for connecting to the terminal connector 6. The shape and size of the terminal connection hole 2-3 are adapted to the shape and size of the terminal connector 6 to ensure a tight fit.

[0025] In this embodiment, the top of the current terminal 2 is integrally formed with a terminal operating part 2-4. The terminal operating part 2-4 is located outside the mounting hole 1-1. The terminal operating part 2-4 can be circular, square, or have a groove shape to facilitate operation with tools. By placing the terminal operating part 2-4 outside the mounting hole 1-1 in this embodiment, it is easier and faster to install and remove the current terminal 2 using tools (such as wrenches, screwdrivers, etc.). The terminal operating part 2-4 is integrally formed with the current terminal 2, which improves the overall mechanical strength and reduces the probability of damage.

[0026] As customer demand for higher sampling accuracy in instruments increases, traditional single-channel instrument transformer sampling can no longer meet the requirements. To address this technical issue, the sampling protection component in this embodiment includes an instrument transformer 3, a live wire current terminal 4, and a neutral wire current terminal 5. The instrument transformer 3 is installed in the mounting slot 1-2. The instrument transformer 3 contains a DC-resistant core 3-1 and a non-DC-resistant core 3-2. The live wire current terminal 4 passes through the DC-resistant core 3-1 and connects to the two outer current terminals 2. The neutral wire current terminal 5 passes through the non-DC-resistant core 3-2 and connects to the two inner current terminals 2. Through the DC-resistant core 3-1 and the non-DC-resistant core 3-2 within the instrument transformer 3, accurate measurement and protection of the live and neutral wire currents are achieved. The live wire current terminal 4 passes through the DC-resistant core 3-1 and connects to the two outer current terminals 2 for measuring the live wire current and providing overcurrent and short-circuit protection. The neutral current terminal piece 5 passes through the non-DC-resistant iron core 3-2 and connects to the two inner current terminals 2 for measuring the neutral current and providing neutral current protection. This design not only improves the accuracy and reliability of the measurement but also enhances the safety and compatibility of the terminal block during use, making it suitable for various application scenarios. In this embodiment, the current transformers for the live and neutral wires are treated as a whole, improving the stability of the current transformer during installation and use while maximizing the reduction of the distance between the two circuit coils and minimizing the overall size of the current transformer. This facilitates the installation and use of the terminals within the instrument, improving the user experience. Furthermore, by adopting the above-mentioned dual-circuit current transformer scheme, the sampling accuracy of the instrument can be further improved, meeting the user's needs.

[0027] To further protect the DC-resistant core 3-1 and the non-DC-resistant core 3-2, the current transformer 3 in this embodiment also includes a current transformer housing 3-3 and a current transformer cover 3-4. The current transformer housing 3-3 and the current transformer cover 3-4 are detachably connected, and both the DC-resistant core 3-1 and the non-DC-resistant core 3-2 are located inside the current transformer housing 3-3. The current transformer housing 3-3 and the current transformer cover 3-4 provide mechanical protection and electrical isolation for the DC-resistant core 3-1 and the non-DC-resistant core 3-2, while simultaneously enabling accurate measurement and protection of the live wire and neutral wire currents through the DC-resistant core 3-1 and the non-DC-resistant core 3-2. The aforementioned current transformer 3 also has a live wire connection hole 3-5 through which the aforementioned live wire current connection piece 4 passes and a neutral wire connection hole 3-6 through which the aforementioned neutral wire current connection piece 5 passes. The aforementioned live wire connection hole 3-5 and the aforementioned neutral wire connection hole 3-6 are both arranged in a "+" shape. The aforementioned live wire current connection piece 4 and the aforementioned neutral wire current connection piece 5 can be installed horizontally or vertically stably in the aforementioned connection holes as needed to ensure the stability and reliability of the electrical connection.

[0028] In this embodiment, the current terminal 2 is made of copper. Using copper to manufacture the current terminal 2 ensures high efficiency and low resistance in current transmission, reduces energy loss, and effectively reduces voltage drop during high current transmission, ensuring circuit stability and reliability. In this embodiment, the terminal block 1 is made of insulating material. Insulating material effectively isolates current, prevents short circuits and leakage, and ensures the safety of operators and equipment.

[0029] In this embodiment, the surface of the current transformer 3 is also provided with wiring pins 7 that can be quickly connected to the PCB board. Multiple wiring pins 7 are designed to meet different connection requirements. The wiring pins 7 can be through-hole or surface-mount, and their specific shape depends on the design and mounting method of the PCB board. The wiring pins 7 are made of copper or other conductive materials, and their surfaces are plated with tin, silver, or other soldering materials to improve solderability and corrosion resistance.

[0030] This embodiment presents a single-phase symmetrical terminal block with an ingenious structure and few components. By setting up a terminal block body 1, current terminals 2, a sampling protection component, and wiring connectors 6, and by making the terminal block body 1 symmetrical, the terminal block has better balance and stability in the mechanical structure of the electrical connection box. Furthermore, this embodiment uses a press-fit current terminal 2, which makes the terminal block easier to install and increases the installation speed. The sampling protection component can effectively protect the circuit while improving sampling accuracy and enhancing the user experience. This is conducive to the promotion and application of the above-mentioned single-phase symmetrical terminal block in the field of electrical connector technology.

[0031] Furthermore, the sampling protection component in this embodiment includes a current transformer 3, a live wire current terminal 4, and a neutral wire current terminal 5. This integrates the current transformers for the live and neutral wires as a single unit, improving the stability of the current transformer during installation and use while maximizing the reduction of the distance between the two loop coils. This minimizes the overall size of the current transformer, facilitating the installation and use of the terminals within the instrument and improving the user experience. Simultaneously, by adopting the aforementioned dual-channel current transformer scheme, the sampling accuracy of the instrument can be further improved, meeting the user's needs.

[0032] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0033] Although this document frequently uses reference numerals from the accompanying drawings: 1. Terminal base; 1-1. Mounting hole; 1-2. Mounting groove; 2. Current terminal; 2-1. Terminal body; 2-2. Terminal connection part; 2-3. Terminal connection hole; 2-4. Terminal operating part; 3. Current transformer; 3-1. DC-resistant core; 3-2. Non-DC-resistant core; 3-3. Current transformer housing; 3-4. Current transformer cover; 3-5. Live wire connection hole; 3-6. Neutral wire connection hole; 4. Live wire current terminal piece; 5. Neutral wire current terminal piece; 6. Wiring connector; 7. Wiring pin, etc., the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A single-phase symmetrical terminal block, characterized in that: The device includes a terminal block (1), a current terminal (2), a sampling protection component, and a wiring connector (6). The terminal block (1) has mounting holes (1-1) for the current terminal (2) to be pressed into. There are multiple mounting holes (1-1), which are symmetrically arranged along the central axis of the terminal block (1). The terminal block (1) is a symmetrical body. The current terminal (2) is used to press into the mounting holes (1-1). A mounting groove (1-2) for the sampling protection component to be installed is formed at the center of the terminal block (1). The wiring connector (6) is used to connect the current terminal (2) to the wire.

2. The single-phase symmetrical terminal block according to claim 1, characterized in that: The mounting hole (1-1) extends inward from the top of the terminal block (1) and is connected to the side of the terminal block (1). The wiring connector (6) passes inward from the side of the mounting hole (1-1) and is perpendicular to the current terminal (2).

3. A single-phase symmetrical terminal block according to claim 2, characterized in that: The current terminal (2) includes a terminal body (2-1) and a terminal connection part (2-2). The terminal body (2-1) has an arc-shaped cross-section, and the terminal connection part (2-2) has a rectangular cross-section. The terminal connection part (2-2) and the terminal body (2-1) are integrally formed. The shape of the mounting hole (1-1) is adapted to the shape of the current terminal (2).

4. A single-phase symmetrical terminal block according to claim 3, characterized in that: The terminal connection part (2-2) is provided with a terminal connection hole (2-3) for connecting to the terminal connector (6).

5. A single-phase symmetrical terminal block according to claim 4, characterized in that: The top of the current terminal (2) is integrally formed with a terminal operation part (2-4), which is located outside the mounting hole (1-1).

6. A single-phase symmetrical terminal block according to claim 1, characterized in that: The sampling protection component includes a current transformer (3), a live wire current terminal (4), and a neutral wire current terminal (5). The current transformer (3) is installed in the mounting slot (1-2). The current transformer (3) has a DC-resistant core (3-1) and a non-DC-resistant core (3-2). The live wire current terminal (4) passes through the DC-resistant core (3-1) and connects to the two current terminals (2) located on the outside. The neutral wire current terminal (5) passes through the non-DC-resistant core (3-2) and connects to the two current terminals (2) located on the inside.

7. A single-phase symmetrical terminal block according to claim 6, characterized in that: The current transformer (3) further includes a current transformer housing (3-3) and a current transformer cover (3-4), which are detachably connected. The DC-resistant iron core (3-1) and the non-DC-resistant iron core (3-2) are both located inside the current transformer housing (3-3). The current transformer (3) also has a live wire connection hole (3-5) through which the live wire current terminal piece (4) passes and a neutral wire connection hole (3-6) through which the neutral wire current terminal piece (5) passes.

8. A single-phase symmetrical terminal block according to claim 7, characterized in that: Both the live wire connection hole (3-5) and the neutral wire connection hole (3-6) are arranged in a "+" shape.

9. A single-phase symmetrical terminal block according to claim 1, characterized in that: The wiring connector (6) is a wiring screw.

10. A single-phase symmetrical terminal block according to claim 1, characterized in that: The current terminal (2) is made of copper; the terminal body (1) is made of insulating material.

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