Wiring terminal

Abstract

The utility model relates to a wiring terminal, which at least comprises a shell and a lead column. The shell is provided with a front-back penetrating cavity and a plurality of guide grooves which are communicated with the cavity and are arranged in parallel, and the extending direction of the guide grooves is perpendicular to the penetrating direction of the cavity; the wire guiding column is located in the cavity, a plurality of elastic elements are arranged between the wire guiding column and the inner wall of the cavity, one end of each elastic element is fixedly connected with the wire guiding column, and the other end of each elastic element is fixedly connected with the inner wall of the cavity in the extending direction of the guiding groove; the two ends of the lead column extend out of the shell in the penetrating direction of the cavity. The wiring terminal provided by the utility model has the advantages of low impedance, simple assembly and high reliability, and the lead column can be adaptively attached according to the posture of the copper sheet in the wiring hole of the electric power metering device.

Description

TECHNICAL FIELD

[0001] The utility model relates to a wiring terminal field, concretely relates to a wiring terminal. BACKGROUND

[0002] The wiring terminal is a kind of accessory product for realizing electrical connection, and is divided into the category of connector in industry.It realizes electrical connection by inserting wire into the aperture of terminal, then fixes wire on terminal by screwing or pressure welding, to provide a reliable electrical connection, prevent wire from loosening due to vibration or other reasons in working process, and ensure the normal work of circuit.In the electric power metering instrument industry, the electrical connection through wiring terminal not only simplifies wiring process, improves wiring efficiency, but also ensures the accuracy and stability of electric power metering.

[0003] As shown in Figure 6 The wiring terminal of prior art includes shell 1 and wire column 2, wire column is fixedly connected with shell and both ends extend outside shell, and upper and lower sides of one end are provided with spring sheet 27.In wiring process, one end of wire column 2 provided with spring sheet is inserted into wiring hole of electric power metering instrument, spring sheet 27 is adhered to copper sheet in wiring hole under the action of spring force, to complete contact with electric power metering instrument.Using such structure design, although convenient and fast, but still there are some technical defects:

[0004] (1) wire column is adhered to copper sheet in wiring hole of electric power metering instrument through spring sheet 27, spring sheet has certain inclination to keep elasticity, which reduces effective contact area of spring sheet and copper sheet in wiring hole.Spring sheet is thin, and cross-sectional area is small, which further reduces conduction area.The two factors jointly cause the increase of impedance between spring sheet and copper sheet.

[0005] (2) the design of upper and lower spring sheets has gap between spring sheet and wire column, and impedance is too large during wire passing, especially when large current.

[0006] As shown in Figure 7As shown, another type of wire terminal in the prior art has a wire post 2, in which a spring sheet 27 is provided on the lower side of one end, and a spring 28 is provided between the spring sheet 27 and the wire post 2. During the wiring process, the side of the wire post 2 provided with the spring sheet is inserted into the wiring hole by horizontal force, and the spring sheet is pressed downward. Under the action of elastic force, the spring sheet presses the wire post 2 in the opposite direction. Under the action of the spring sheet and the spring, the wire post is fitted with the copper sheet in the wiring hole. In this way, the copper sheet in the wiring hole is directly fitted with the wire post, which reduces the impedance compared to the wiring terminal with spring sheets on both sides. However, there are still some technical defects. Since a spring-spring sheet structure is added to the wire post, on the one hand, the structure is more complicated; on the other hand, during the repeated plugging and unplugging of the wiring terminal and the wiring hole, the spring-spring sheet structure is easily deformed and failed under the repeated squeezing force, which reduces the service life and reliability of the wiring terminal. Summary of the Invention

[0007] The technical problem to be solved by the utility model is to provide a wiring terminal with low impedance, simple assembly, high reliability, and a conductor column capable of adaptively fitting according to the posture of a copper sheet in a wiring hole of an electric power meter.

[0008] In order to solve the above technical problems, the present invention provides a technical solution, a terminal block, comprising at least:

[0009] A housing, the housing being provided with a cavity extending front to back and a plurality of guide grooves communicating with the cavity and arranged in parallel, wherein the extending direction of the guide grooves is perpendicular to the penetrating direction of the cavity;

[0010] A wire post, wherein the wire post is located in the cavity and a plurality of elastic elements are arranged between the wire post and the inner wall of the cavity, one end of the elastic element is fixedly connected to the wire post, and the other end is fixedly connected to the inner wall of the cavity along the extension direction of the guide groove, and the wire post is provided with a plurality of guide blocks adapted to the guide groove, and both ends of the wire post extend out of the shell along the penetrating direction of the cavity.

[0011] In a preferred embodiment, a contact is provided at one end of the wire column, and the material of the contact includes one or more of copper, silver or graphene.

[0012] In a preferred embodiment, a guiding slope is provided at one end of the contact away from the housing.

[0013] In a preferred embodiment, the guide groove includes a first guide groove located above the wire post and a second guide groove coaxial with the first guide groove and located below the wire post.

[0014] In a preferred embodiment, the guide block includes a first guide block adapted to the first guide groove and a second guide block adapted to the second guide groove, the end face of the first guide block close to one end of the wire column is provided with a positioning portion extending outward, the wire column is provided with a positioning hole adapted to the positioning portion, and the positioning portion passes through the positioning hole and is fixedly connected to the second guide block.

[0015] In a preferred embodiment, the elastic element includes a first elastic element and a second elastic element respectively located on both sides of the positioning hole, the bottom of the wire column is provided with a first mounting hole for installing the first elastic element and the second elastic element, and the cavity is provided with a second mounting hole for installing the first elastic element and the second elastic element at a position corresponding to the first mounting hole.

[0016] In a preferred embodiment, a plurality of third mounting holes are provided at one end of the wire post away from the contact.

[0017] In a preferred embodiment, the conductor post is provided with a transition portion whose cross-sectional area is gradually reduced from the first mounting hole toward the contact point.

[0018] In a preferred embodiment, the shell includes a first shell and a second shell adapted to the first shell, and the first shell and the second shell are detachably connected to form the cavity.

[0019] In a preferred embodiment, the first shell is provided with a plurality of positioning blocks at intervals, and the second shell is provided with positioning grooves corresponding one-to-one to the positioning blocks.

[0020] Compared with the prior art, the wiring terminal of the present invention has the following beneficial effects:

[0021] (1) The terminal block of the present invention comprises at least a housing and a conductor post. The housing is provided with a cavity extending from front to back and a plurality of guide slots connected to the cavity and arranged in parallel. The extension direction of the guide slots is perpendicular to the direction of penetration of the cavity. The conductor post is located in the inner cavity and a plurality of elastic elements are provided between the conductor post and the inner wall of the cavity. One end of the elastic element is fixedly connected to the conductor post and the other end is fixedly connected to the inner wall of the cavity along the extension direction of the guide slot. The conductor post is provided with a plurality of guide blocks adapted to the guide slots, so that the conductor post is more stable when inserted into the wiring hole of the power meter, reducing loosening or displacement caused by external forces. Both ends of the conductor post extend out of the housing along the direction of penetration of the cavity. With such a structural design, on the one hand, the wire post can move vertically along the through-direction of the cavity under the action of the guide block and the guide groove, and can adjust the height in the vertical direction according to the wiring position of different types of power metering instruments, ensuring that the wiring terminal can be accurately inserted into the wiring hole, thereby improving the wiring efficiency and versatility of the wiring terminal; on the other hand, under the action of the elastic element, the wire post is adaptively fitted according to the posture of the copper sheet in the wiring port of the power metering instrument, so that the wire post is in direct contact with the copper sheet, thereby increasing the effective contact area and conduction area between the wire post and the copper sheet, reducing impedance, reducing energy loss during power transmission, improving the accuracy of power metering, and at the same time avoiding the deformation and failure problem of the spring sheet under repeated extrusion force, thereby improving the service life and reliability of the terminal.

[0022] (2) In the terminal block of the present invention, a contact is provided at one end of the conductor post, and the material of the contact includes one or more of copper, silver, or graphene. Through the design of the contact structure, on the one hand, the conductor post is better fitted to the copper sheet in the wiring port of the power meter. On the other hand, by providing the contact with a low-impedance material, the contact impedance between the conductor post and the copper sheet is further reduced, thereby meeting the requirement for large current flow, reducing energy loss during power transmission, and improving the accuracy of power metering.

[0023] (3) The wiring terminal of the utility model, the elastic element includes first elastic element and second elastic element which are located at both sides of the positioning hole respectively, the bottom of the wire column is provided with first installation hole for installing first elastic element and second elastic element, the cavity is provided with second installation hole for installing first elastic element and second elastic element at the position corresponding to the first installation hole. The double elastic element design at both sides of the positioning hole, on the one hand, it effectively prevents the displacement deviation of the wire column under the unilateral elastic force, and further avoids the common problem of jamming. At the same time, in the process of inserting and pulling out the wiring terminal, this design can more evenly disperse the extrusion force, reduce the stress burden of a single elastic element, reduce the risk of deformation or failure of the elastic element due to repeated extrusion, thereby improving the service life and reliability of the wiring terminal;On the other hand, the synergistic effect of the double spring element further enhances the adhesion of the wire column and the copper sheet in the power metering instrument wiring port. This close adhesion not only ensures the stable transmission of current, but also meets the requirement of passing large current, and provides a strong guarantee for the accuracy of power measurement. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is an overall structure schematic view of a wiring terminal embodiment of the utility model;

[0025] Figure 2 It is another angle overall structure schematic view of a wiring terminal embodiment of the utility model;

[0026] Figure 3 It is a guide block structure schematic view of a wiring terminal embodiment of the utility model;

[0027] Figure 4 It is a wire column structure schematic view of a wiring terminal embodiment of the utility model;

[0028] Figure 5 It is the installation section view of a wiring terminal embodiment of the utility model;

[0029] Figure 6 It is the structure schematic view of prior art wiring terminal;

[0030] Figure 7 It is the structure schematic view of prior art conductive column.

[0031] BRIEF DESCRIPTION OF DRAWINGS:

[0032] 1 - shell;11 - cavity;111 - second installation hole;12 - guide groove;121 - first guide groove;122 - second guide groove;13 - first shell;131 - positioning block;14 - second shell;141 - positioning groove;

[0033] 2-wire post; 21-elastic element; 211-first elastic element; 212-second elastic element; 22-guide block; 221-first guide block; 2211-positioning portion; 222-second guide block; 23-contact; 231-guide slope; 24-positioning hole; 25-first mounting hole; 26-third mounting hole; 27-spring leaf; 28-spring; 29-transition portion. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0035] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, an integral connection, or a detachable connection; it can be the internal communication of two components; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The wiring terminals of this embodiment, such as Figure 1-2 As shown, it comprises at least a housing 1 and a wire post 2. The housing 1 in this embodiment comprises a first housing 13 and a second housing 14. The first housing is provided with a plurality of positioning blocks 131, and the second housing 14 is provided with a plurality of positioning slots 141 corresponding to the positioning blocks. The first housing and the second housing are fastened together and fixed by screws to form a cavity 11 extending from front to back.

[0038] The housing 1 is provided with several parallel guide slots 12 that communicate with the cavity. The guide slots extend perpendicularly to the direction through which the cavity extends. A conductor post 2 is positioned within the cavity, with several elastic elements 21 disposed between it and the inner wall. One end of the elastic element is fixedly connected to the conductor post, and the other end is fixedly connected to the inner wall along the direction in which the guide slots extend. The conductor post is equipped with several guide blocks 22 that mate with the guide slots 12. This ensures greater stability when inserted into the wiring hole of the power meter, reducing loosening or displacement caused by external forces. Both ends of the conductor post extend out of the housing along the direction through which the cavity extends. With such a structural design, on the one hand, the wire post can move vertically along the through-direction of the cavity under the action of the guide block and the guide groove, and can adjust the height in the vertical direction according to the wiring position of different types of power metering instruments, ensuring that the wiring terminal can be accurately inserted into the wiring hole, thereby improving the wiring efficiency and versatility of the wiring terminal; on the other hand, under the action of the elastic element, the wire post is adaptively fitted according to the posture of the copper sheet in the wiring port of the power metering instrument, so that the wire post is in direct contact with the copper sheet, thereby increasing the effective contact area and conduction area between the wire post and the copper sheet, reducing impedance, reducing energy loss during power transmission, improving the accuracy of power metering, and at the same time avoiding the deformation and failure problem of the spring sheet under repeated extrusion force, thereby improving the service life and reliability of the terminal.

[0039] In this embodiment, the guide groove 12 includes a first guide groove 121 located above the wire rod and a second guide groove 122 coaxial with the first guide groove and located below the wire rod. The guide block 22 includes a first guide block 221 adapted to the first guide groove and a second guide block 222 adapted to the second guide groove. Figure 3 and Figure 5 As shown, the end surface of the first guide block 221 close to the end of the wire column is provided with a positioning portion 2211 extending outward. Figure 4 and Figure 5 As shown, the conductor post is provided with a positioning hole 24 adapted to the positioning portion, and the positioning portion passes through the positioning hole and is fixedly connected to the second guide block.

[0040] In this embodiment, the elastic element 21 includes a first elastic element 211 and a second elastic element 212, respectively, located on either side of the positioning hole. A first mounting hole 25 for mounting the first and second elastic elements is provided at the bottom of the conductor post, and a second mounting hole 111 for mounting the first and second elastic elements is provided in the cavity at a position corresponding to the first mounting hole. The dual elastic element design located on either side of the positioning hole effectively prevents the conductor post from being displaced by a unilateral elastic force, thereby avoiding the common problem of jamming. Furthermore, during the insertion and removal of the terminal, this design can more evenly distribute the extrusion force, reducing the stress burden on a single elastic element and the risk of deformation or failure of the elastic element due to repeated extrusion, thereby improving the service life and reliability of the terminal. Furthermore, the synergistic effect of the dual spring elements further enhances the fit between the conductor post and the copper sheet within the wiring port of the power meter. This tight fit not only ensures stable current transmission but also meets the requirements for high current flow, providing a strong guarantee for the accuracy of power metering.

[0041] In this embodiment, a double compression spring with a wire diameter of 0.8 mm is used to generate a compressive elastic force to make the wire post contact and fit with the copper sheet in the connection port of the power meter, and the fitting force meets the requirement of large current passing.

[0042] A contact 23 is provided at one end of the conductor post. The contact material includes one or more of copper, silver, or graphene. In this embodiment, the contact is made of silver, which has a resistivity of 1.62×10-8Ω·m, improving conductivity. The design of the contact structure allows the conductor post to better fit the copper sheet in the wiring port of the power meter. Furthermore, by providing a contact made of low-impedance material, the contact impedance between the conductor post and the copper sheet is further reduced, meeting the requirements for high current flow, reducing energy loss during power transmission, and improving the accuracy of power metering.

[0043] In this embodiment, a guide slope 231 is provided on the end of the contact away from the housing. This helps the contact more easily find the correct contact position, reducing problems caused by improper installation or difficult commissioning. This helps improve installation and commissioning efficiency and reduce maintenance costs.

[0044] Preferably, a plurality of third mounting holes 26 are provided at one end of the wire post away from the contacts for connecting to external devices.

[0045] Preferably, the conductor post is provided with a transition portion 29 whose cross-sectional area is gradually reduced from the first mounting hole 25 toward the contact 23. On the one hand, this ensures the overall strength of the conductor post; on the other hand, it enables the end provided with the contact to adapt to the wiring hole of the power meter.

[0046] In conclusion, the above only the preferred embodiments of the present application, and not to limit the present application, any modification, equivalent replacement and improvement, etc. made within the spirit and principles of the present application, should be included in the scope of protection of the present application.

Claims

1. A terminal block, characterized in that: At least: A shell (1), the shell being provided with a cavity (11) penetrating from front to back and a plurality of guide grooves (12) communicating with the cavity and arranged in parallel, wherein the extending direction of the guide grooves is perpendicular to the penetrating direction of the cavity; A wire post (2), wherein the wire post is located in the cavity and a plurality of elastic elements (21) are provided between the wire post and the inner wall of the cavity, one end of the elastic element is fixedly connected to the wire post, and the other end is fixedly connected to the inner wall of the cavity along the extension direction of the guide groove, the wire post is provided with a plurality of guide blocks (22) adapted to the guide groove, and both ends of the wire post extend out of the housing along the penetrating direction of the cavity.

2. A terminal block according to claim 1, characterized in that: A contact (23) is provided at one end of the conductor post, and the material of the contact includes one or more of copper, silver or graphene.

3. A terminal block according to claim 2, characterized in that: A guiding slope (231) is provided at one end of the contact away from the housing.

4. A terminal block according to claim 3, characterized in that: The guide groove (12) comprises a first guide groove (121) located above the wire post and a second guide groove (122) coaxial with the first guide groove and located below the wire post.

5. A terminal block according to claim 4, characterized in that: The guide block (22) comprises a first guide block (221) adapted to the first guide groove and a second guide block (222) adapted to the second guide groove, wherein the end surface of the first guide block close to one end of the wire column is provided with a positioning portion (2211) extending outward, and the wire column is provided with a positioning hole (24) adapted to the positioning portion, and the positioning portion passes through the positioning hole and is fixedly connected to the second guide block.

6. A connecting terminal according to claim 5, characterized in that: The elastic element (21) comprises a first elastic element (211) and a second elastic element (212) respectively located on both sides of the positioning hole; a first mounting hole (25) for mounting the first elastic element and the second elastic element is provided at the bottom of the lead column; and a second mounting hole (111) for mounting the first elastic element and the second elastic element is provided at a position corresponding to the first mounting hole in the cavity.

7. A connecting terminal according to claim 6, characterized in that: A plurality of third mounting holes (26) are provided at one end of the wire post away from the contact.

8. A connecting terminal according to claim 7, characterized in that: The conductor post is provided with a transition portion (29) whose cross-sectional area is gradually reduced from the first mounting hole (25) toward the contact point (23).

9. A terminal block according to any one of claims 1 to 8, characterized in that: The housing (1) comprises a first housing (13) and a second housing (14) adapted to the first housing, and the first housing and the second housing are detachably connected to form the cavity (11).

10. A connecting terminal according to claim 9, characterized in that: The first shell is provided with a plurality of positioning blocks (131) at intervals, and the second shell is provided with positioning grooves (141) corresponding one-to-one to the positioning blocks.

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