Wiring terminal anti-loosening structure of intelligent electric meter
By using a design that secures the wire conduit to the insulation layer and separates the wiring slots with blocks, the problem of loose terminals is solved, ensuring a stable connection of the wires and improving the metering accuracy and safety of the smart meter.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-26
- Publication Date
- 2026-03-03
AI Technical Summary
The wiring terminal structure of existing smart meters is prone to loosening under conditions of wire tension or vibration, resulting in a reduction in contact area, affecting metering accuracy and potentially causing safety hazards.
The anti-reverse arm of the clamping tube is clamped to the insulation layer of the conductor, and the junction box is divided into an independent groove by the stop block. The conductor core is pressed with the pressure block. The axial movement of the conductor is restricted through multiple fixing methods to enhance the connection stability.
It effectively prevents the conductor from shifting under vibration, reduces contact resistance, improves metering accuracy and meter operation safety, and reduces the risk of overheating.
Smart Images
Figure CN223966632U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of smart meter technology, and in particular to a structure for preventing loosening of the wiring terminals of a smart meter. Background Technology
[0002] Smart meters are the core equipment for electricity metering. Their terminals, as the electrical connection components between the wires and the meter, directly affect the accuracy of metering and the safety of electricity use. In existing technologies, the terminals of smart meters generally adopt a single-hole wiring cavity combined with a screw clamping structure: after the wire is inserted into the single-diameter wiring cavity, the wire core is clamped by tightening the wiring screw, thus achieving electrical connection.
[0003] However, in this structure, the wiring cavity only applies clamping force to the wire core, and the wire insulation layer has no effective limit. When the wire is pulled during the wiring process, or when the meter is in a slight vibration environment caused by wall vibration or the start and stop of electrical appliances for a long time, the wire is prone to axial movement, which reduces the contact area between the wire core and the terminal and increases the contact resistance. This not only affects the metering accuracy, but may also cause safety hazards due to heat generation. Utility Model Content
[0004] The purpose of this utility model is to provide an anti-loosening structure for the wiring terminals of a smart meter, which can solve the above-mentioned technical problems.
[0005] This utility model provides an anti-loosening structure for the wiring terminals of a smart meter, including a mounting shell, a cover, and a control board. The control board is mounted on the mounting shell, and the cover is fixedly connected to the mounting shell. It also includes: a wiring cavity formed on the mounting shell, with several blocks inside dividing the cavity into several wiring slots; several wiring blocks, each disposed within one of the wiring slots and connected to the control board; several pressure blocks connected to the wiring blocks via several locking elements; and several wire-passing holes formed at the bottom of the mounting shell, each containing a wire-clamping tube. The wire-clamping tube includes a guide section and a wire-passing section, with several anti-retraction arms at the connection point between the guide section and the wire-passing section. In the inserted state, the conductor core passes through the guide section and the wire-passing section and is placed between the wiring blocks and the pressure blocks, with the anti-retraction arms engaging with the conductor insulation layer.
[0006] As a further technical solution, the terminal block is provided with several first anti-slip textures.
[0007] As a further technical solution, a first inclined surface is provided on the first anti-slip texture, and the inclination direction of the first inclined surface is consistent with the insertion direction of the wire.
[0008] As a further technical solution, the pressure block is provided with several second anti-slip textures.
[0009] As a further technical solution, a second inclined surface is provided on the second anti-slip texture, and the inclination direction of the second inclined surface is consistent with the insertion direction of the wire.
[0010] As a further technical solution, a clamping arm is provided on the pressure block. When the wire is inserted, the clamping arm contacts the wire and applies a clamping force to the wire under the action of the locking device.
[0011] As a further technical solution, the diameter of the guide section is larger than the diameter of the threading section, so that a third inclined surface is formed at the connection between the guide section and the threading section; several anti-reverse arms are set on the third inclined surface.
[0012] As a further technical solution, the anti-slip arm includes: a connecting plate, one end of which is set on the third inclined surface; and several third anti-slip patterns, which are set on the connecting plate.
[0013] As a further technical solution, a fourth inclined surface is provided on the third anti-slip texture, and the inclination direction of the fourth inclined surface is consistent with the insertion direction of the wire.
[0014] As a further technical solution, the third anti-slip texture has a flat surface, and several limiting teeth are provided on the flat surface. When the wire is inserted, several limiting teeth contact the insulation layer of the wire.
[0015] The technical solution of this utility model can directly restrict the axial movement of the wire by locking the anti-reverse arm of the wire conduit with the insulation layer of the wire, thus avoiding the problem of wire displacement in scenarios such as wiring pulling, wall vibration, and electrical appliance start-stop vibration. It prevents the contact area between the wire core and the connector block from decreasing from the root, thereby reducing the risk of increased contact resistance.
[0016] In addition, by using blocks to divide the wiring cavity into several independent wiring slots, multiple wires can be arranged separately, which not only avoids mutual interference between wires, but also allows the core of each wire to be accurately positioned between the wiring block and the pressure block, greatly improving the accuracy of wiring operations and the regularity of subsequent lines.
[0017] Furthermore, the dual fixing method of locking the insulation layer with the anti-reverse arm and pressing the wire core with the pressure block enhances the connection stability between the wire and the terminal. This not only maintains a stable electrical contact state and ensures the accuracy of power metering, but also reduces the risk of overheating caused by poor contact, thus improving the long-term operational safety of the smart meter. Attached Figure Description
[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0019] Figure 1 This is a first-view perspective perspective view of the anti-loosening structure of the wiring terminals of a smart meter according to the present invention.
[0020] Figure 2 This is a schematic diagram of the anti-loosening structure of the wiring terminals of a smart meter according to the present invention;
[0021] Figure 3 for Figure 2 Enlarged sectional view of the structure along the AA direction;
[0022] Figure 4 This is a cross-sectional view from a second perspective of the anti-loosening structure for the wiring terminals of a smart meter according to this utility model;
[0023] Figure 5 Figure 4 Enlarged structural diagram of section X in the middle.
[0024] Explanation of reference numerals in the attached figures:
[0025] 101-Mounting shell; 102-Cap; 200-Stop block; 300-Wiring groove; 400-Wiring block; 500-Pressure block; 501-Locking element; 600-Wire hole; 700-Wire clamping tube; 701-Guide section; 702-Wire section; 703-Anti-reverse arm; 731-Connecting plate; 732-Third anti-slip texture; 733-Fourth inclined surface; 734-Limiting tooth; 801-First anti-slip texture; 802-First inclined surface; 803-Second anti-slip texture; 804-Second inclined surface; 805-Pressure arm; 807-Third inclined surface. Detailed Implementation
[0026] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0029] like Figure 1-5 As shown, this utility model provides an anti-loosening structure for the wiring terminals of a smart meter, including a mounting shell 101, a cover 102, and a control board. The control board is mounted on the mounting shell 101, and the cover 102 is fixedly connected to the mounting shell 101. In this utility model, the control board is mounted on the mounting shell 101, and the mounting shell 101 and the cover 102 cooperate to seal and protect the control board. In addition, a display hole is opened on the cover 102, and a display screen is provided in the display hole. The control board is connected to the display screen. Specifically, the control board is the control board in the existing smart meter, which can perform electrical energy measurement and display the measurement results on the display screen. It also includes:
[0030] A wiring cavity is formed on the mounting shell 101, specifically at the bottom of the mounting shell 101. Several baffles 200 are provided within the wiring cavity, dividing it into several wiring slots 300. Preferably, three baffles 200 are provided, forming four wiring slots 300 within the wiring cavity. Several wiring blocks 400 are respectively disposed within the wiring slots 300 and are all connected to the control board. When a wire is inserted, it conducts electricity through the wiring blocks 400. Preferably, the wiring blocks 400 are made of brass. Several pressure blocks 500 are connected to the wiring blocks 400 via several locking elements 501 (preferably bolts). When a wire is inserted, the wire core is positioned between the wiring blocks 400 and the pressure blocks 500. Tightening the locking elements 501 compresses the wire, confining it between the pressure blocks 500 and the wiring blocks 400. Preferably, the pressure blocks 500 are made of phosphor bronze. A wire-passing hole 600 is provided at the bottom of the mounting housing 101, and a wire-clamping tube 700 is provided in each of the several wire-passing holes 600 (the wire-clamping tube 700 can be fixed in the wire-passing hole 600 by interference fit, or can be connected by existing technologies such as adhesive or snap-fit); the wire-clamping tube 700 includes a guide section 701 and a wire-passing section 702, and several anti-reverse arms 703 are provided at the connection between the guide section 701 and the wire-passing section 702; in the inserted state, the wire core passes through the guide section 701 and the wire-passing section 702 and is placed between the terminal block 400 and the pressure block 500, and the several anti-reverse arms 703 are snapped into the wire insulation layer; specifically, when the wire is restricted by the pressure block 500 and the terminal block 400, the several anti-reverse arms 703 contact the wire insulation layer, wherein the several anti-reverse arms 703 are evenly distributed circumferentially, so the radial preload is applied to the wire insulation layer by the cooperation of the several anti-reverse arms 703, thereby restricting the wire movement;
[0031] In this utility model, three anti-reverse arms 703 are preferably provided and are arranged circumferentially at the connection between the guide section 701 and the wire-passing section 702. When the wire is inserted, it will contact the three anti-reverse arms 703 respectively and deform the anti-reverse arms 703. After the wire is fixed by the terminal block 400 and the pressure block 500, the anti-reverse arms 703 contact the insulation layer of the wire to prevent the wire from moving.
[0032] The technical solution of this utility model is that the anti-reverse arm 703 of the clamping tube 700 is clamped to the insulation layer of the wire, which can directly restrict the axial movement of the wire and avoid the problem of wire displacement in scenarios such as wiring pulling, wall vibration, and electrical appliance start-stop vibration. It prevents the contact area between the wire core and the terminal block 400 from decreasing from the root, and reduces the risk of increased contact resistance.
[0033] In addition, by using the stop block 200 to divide the wiring cavity into several independent wiring slots 300, the multiple wires can be arranged separately, which not only avoids mutual interference between the wires, but also allows the core of each wire to be accurately positioned between the wiring block 400 and the pressure block 500, which greatly improves the accuracy of the wiring operation and the regularity of the subsequent lines.
[0034] Furthermore, the dual fixing method of locking the insulation layer with the anti-reverse arm 703 and pressing the wire core with the pressure block 500 enhances the connection stability between the wire and the terminal. This not only maintains a stable electrical contact state and ensures the accuracy of power metering, but also reduces the risk of overheating caused by poor contact, thus improving the long-term operational safety of the smart meter.
[0035] like Figure 2 As shown, the connector block 400 is provided with a plurality of first anti-slip patterns 801. When the pressure block 500 is connected to the connector block 400, the first anti-slip patterns 801 increase the friction between the connector block 400 and the conductor core, ensuring the stability of the conductor core after connection. In addition, the first anti-slip patterns 801 are provided with a first inclined surface 802, the inclination direction of the first inclined surface 802 being consistent with the insertion direction of the conductor. In this way, during the insertion of the conductor, the first inclined surface 802 guides the conductor, preventing the first anti-slip patterns 801 from affecting the insertion of the conductor. The number of first anti-slip patterns 801 is determined according to actual needs, and this utility model does not further limit it.
[0036] like Figure 2 As shown, the pressure block 500 is provided with a plurality of second anti-slip textures 803. When the pressure block 500 is connected to the connector block 400, the first anti-slip textures 801 and the second anti-slip textures 803 work together to increase the friction between the connector block 400 and the pressure block 500 and the two sides of the conductor core, further ensuring the stability of the conductor core after connection. In addition, the second anti-slip textures 803 are provided with a second inclined surface 804, the inclination direction of the second inclined surface 804 being consistent with the insertion direction of the conductor. In this way, the second inclined surface 804 can guide the conductor during the insertion process, avoiding the interference of the second anti-slip textures 803 on the conductor insertion. The number of second anti-slip textures 803 is determined according to actual needs, and this utility model does not further limit it.
[0037] In addition, to further increase the stability of the conductor, a clamping arm 805 is preferably provided on the clamping block 500. In the inserted state, the clamping arm 805 contacts the conductor core and applies radial clamping force to the conductor core under the action of the locking member 501. Specifically, when the locking member 501 is tightened, the clamping block 500 can be moved towards the position of the connector block 400, and during the movement of the clamping block 500, the clamping arm 805 is moved towards the position of the conductor. As the clamping block 500 is connected to the connector block 400, the clamping arm 805 contacts the conductor, thereby further increasing the limiting effect on the conductor. In this utility model, a groove is provided on the clamping arm 805. When it contacts the conductor, the conductor is placed in the groove, and the conductor is clamped by the groove. The groove is a semi-circular groove with a diameter slightly smaller than the outer diameter of the conductor. During clamping, the groove forms an interference fit around the conductor through elastic deformation, ensuring a tight fit and improving clamping stability.
[0038] like Figure 3 and Figure 5 As shown, the diameter of the guide section 701 is larger than the diameter of the wire-passing section 702, so that a third inclined surface 807 is formed at the connection between the guide section 701 and the wire-passing section 702; a plurality of anti-retraction arms 703 are provided on the third inclined surface 807; wherein, the diameter of the guide section 701 is larger than the diameter of the wire, which makes it easier to insert the wire. As the wire is continuously inserted, the wire is guided by the third inclined surface 807 and enters the wire-passing section 702, and after passing through the wire-passing section 702, it reaches the terminal slot 300; thus, the wire insertion efficiency can be improved by the coordinated action of the guide section 701, the third inclined surface 807 and the wire-passing section 702.
[0039] In this utility model, the anti-reverse arm 703 includes: a connecting plate 731, one end of which is disposed on the third inclined surface 807; a plurality of third anti-slip patterns 732 are disposed on the connecting plate 731; when the wire is inserted, the wire contacts the anti-slip patterns and applies a squeezing force to the connecting plate 731, causing the connecting plate 731 to deform; after the wire is inserted, under the reaction force generated by the connecting plate 731, the third anti-slip patterns 732 are tightly attached to the insulation layer of the wire, thereby limiting the insulation layer of the wire; preferably, the anti-reverse arm 703 and the wire clamping tube 700 are integrally injection molded, and the molded connecting plate 731 is a plate-shaped elastic structure that can undergo elastic deformation when the wire is inserted;
[0040] In addition, a fourth inclined surface 733 is provided on the third anti-slip texture 732, and the inclination direction of the fourth inclined surface 733 is consistent with the insertion direction of the wire; this allows the wire to be guided by the third inclined surface 807 during the insertion process, preventing the third anti-slip texture 732 from affecting the wire insertion; the number of third anti-slip textures 732 is determined according to actual needs, and this utility model does not further limit it; such as Figure 3 and 5As shown, the third anti-slip texture 732 has a flat surface, and a plurality of limiting teeth 734 are provided on the flat surface. In the inserted state, the plurality of limiting teeth 734 contact the insulation layer of the wire. The limiting teeth 734 have a sharp conical structure. After the wire is inserted, the limiting teeth 734 are embedded in the surface of the insulation layer of the wire to form a mechanical clamping, further restricting the axial movement of the wire. Preferably, the limiting teeth 734 are inclined, and the inclination direction is the same as the inclination direction of the fourth inclined surface 733, thereby avoiding obstruction of wire insertion. The number of limiting teeth 734 is determined according to the actual situation, and this utility model does not further limit it.
[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.
Claims
1. A terminal anti-loosening structure for a smart meter, comprising a mounting shell (101), a cover (102), and a control board, wherein the control board is disposed on the mounting shell (101), and the cover (102) is fixedly connected to the mounting shell (101), characterized in that, Also includes: A wiring cavity is provided on the mounting shell (101), and a plurality of blocks (200) are provided in the wiring cavity to divide the wiring cavity into a plurality of wiring slots (300). Several wiring blocks (400) are respectively installed in several wiring slots (300) and are all connected to the control board; Several pressure blocks (500) are connected to the wiring block (400) via several locking elements (501); A plurality of wire-passing holes (600) are provided at the bottom of the mounting housing (101), and a wire-clamping tube (700) is provided in each of the plurality of wire-passing holes (600); the wire-clamping tube (700) includes a guide section (701) and a wire-passing section (702), and a plurality of anti-reverse arms (703) are provided at the connection between the guide section (701) and the wire-passing section (702); in the wire-insertion state, the wire core passes through the guide section (701) and the wire-passing section (702) and is placed between the terminal block (400) and the pressure block (500), and the plurality of anti-reverse arms (703) are clamped to the wire insulation layer.
2. The anti-loosening structure for the wiring terminals of the smart meter according to claim 1, characterized in that, The wiring block (400) is provided with a number of first anti-slip patterns (801).
3. The anti-loosening structure for the wiring terminals of the smart meter according to claim 2, characterized in that, The first anti-slip texture (801) is provided with a first inclined surface (802), and the inclination direction of the first inclined surface (802) is consistent with the insertion direction of the wire.
4. The anti-loosening structure for the wiring terminals of the smart meter according to claim 3, characterized in that, The pressure block (500) is provided with a number of second anti-slip textures (803).
5. The anti-loosening structure for the wiring terminals of the smart meter according to claim 4, characterized in that, The second anti-slip texture (803) is provided with a second inclined surface (804), and the inclination direction of the second inclined surface (804) is consistent with the insertion direction of the wire.
6. The anti-loosening structure for the wiring terminals of the smart meter according to claim 5, characterized in that, The pressure block (500) is provided with a pressure arm (805). When the wire is inserted, the pressure arm (805) contacts the wire and applies a pressure force to the wire under the action of the locking member (501).
7. The anti-loosening structure for the wiring terminals of the smart meter according to claim 1, characterized in that, The diameter of the guide section (701) is larger than the diameter of the threading section (702) so that a third inclined surface (807) is formed at the connection between the guide section (701) and the threading section (702); a plurality of anti-reverse arms (703) are provided on the third inclined surface (807).
8. The anti-loosening structure for the wiring terminals of the smart meter according to claim 7, characterized in that, The anti-reverse arm (703) includes: The connecting plate (731) is set at one end on the third inclined surface (807); Several third anti-slip patterns (732) are provided on the connecting plate (731).
9. The anti-loosening structure for the wiring terminals of the smart meter according to claim 8, characterized in that, The third anti-slip texture (732) is provided with a fourth inclined surface (733), and the inclination direction of the fourth inclined surface (733) is consistent with the insertion direction of the wire.
10. The anti-loosening structure for the wiring terminals of the smart meter according to claim 9, characterized in that, The third anti-slip texture (732) has a flat surface, and a number of limiting teeth (734) are provided on the flat surface. When the wire is inserted, the number of limiting teeth (734) are in contact with the wire insulation layer.