A terminal fastener for low voltage electrical apparatus

Abstract

The application discloses a kind of low-voltage electric appliance wire fastener, it is related to low-voltage electric appliance technical field, including fastening frame, fastening nail and C type linkage fastening plate, the bottom of fastening nail is equipped with guide column, fastening nail passes through the guide column and is equipped with the guide hole in C type linkage fastening plate, so that fastening nail can always guarantee C type linkage fastening plate and fastening nail perpendicular to the fastened wire in the process of fastening wire, so that wire fastener can concentrate stress in the whole fastening process;The guide column is through the common effect with C type linkage fastening plate, so that fastener can pass through the elastic deformation of C type linkage fastening plate after fastening wire, ensure that wire does not loosen in the use process due to thermal expansion and contraction and other factors, improve the reliability of fastener.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical technology, specifically to a wiring fastener for low-voltage electrical appliances. Background Technology

[0002] Currently, the screws and pressure pads of terminal blocks used in domestically produced low-voltage electrical components are mostly riveted, which involves complex manufacturing processes. Furthermore, due to process requirements, the riveting materials used are often of low strength, making them prone to failure due to riveting falling off during user operation, thus affecting the overall product lifespan. Additionally, most terminal blocks lack screw locking mechanisms, leading to riveting breakage due to excessive loosening by customers, further impacting product lifespan. Moreover, due to structural limitations, most terminal blocks have a relatively low overall height, limiting their wiring capacity.

[0003] In addition, some junction boxes lack a guiding function between the pad and the screw, resulting in force leakage during the tightening of wires and affecting the junction box's ability to tighten wires.

[0004] As the requirements for the safety performance of electrical components in the low-voltage electrical field become increasingly stringent, it is particularly important to design junction boxes with high safety protection functions as components of electrical components.

[0005] To address the above issues and improve the overall performance of electrical components in the low-voltage electrical field, this invention provides a wiring fastener with high reliability and safety performance. This fastener is suitable for electrical components in the low-voltage electrical field that have high requirements for the wiring performance of the main body of the electrical components. Summary of the Invention

[0006] The purpose of this invention is to provide a wiring fastener for low-voltage electrical appliances. This fastener is suitable for electrical components in the low-voltage electrical appliance field that have high requirements for the wiring performance of the main body of the electrical components, making the wiring performance of the electrical components more reliable and safer, thereby solving the problems mentioned in the background art.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A wiring fastener for low-voltage electrical appliances includes a fastening frame, a fastening pin, and a C-shaped linkage fastening plate. The fastening pin has a guide post at its bottom, and passes through a guide hole in the C-shaped linkage fastening plate via the guide post. This ensures that the C-shaped linkage fastening plate and the fastening pin are always perpendicular to the wire being fastened during the tightening process, concentrating the force on the wiring fastener throughout the tightening process and preventing force leakage, thus ensuring a secure fastening of the wire. The guide post, in conjunction with the C-shaped linkage fastening plate, allows the fastener to withstand the elastic deformation of the C-shaped linkage fastening plate after the wire is tightened, ensuring that the wire will not loosen due to thermal expansion and contraction during use, thereby improving the reliability of the fastener. The fastening pin has a fixing post at its upper part. The fixing post passes through the fixing square hole at the upper end of the C-type linkage fastening plate and is then connected to the threaded hole at the upper end of the fastening frame by threads. When the fixing post reaches the area of ​​the fixing square hole, it is fastened by three fastening protrusions formed by tooling equipment around the fixing square hole on the C-type linkage fastening plate. Through a reasonable thread fastening stroke design, the guide post passes through the guide hole exactly when the fixing post reaches the area of ​​the fixing square hole. A pressure relief column is designed between the threaded post and the guide post on the fastening screw. During the loosening process of the fastening screw, the pressure relief column can effectively allow the fastening screw to rotate freely in the inverted "T"-shaped threaded hole of the fastening frame after the threaded post on the fastening screw is unscrewed. This pressure relief column ensures that the fastening screw will not deform the C-type linkage fastening plate during the loosening process, preventing damage to the C-type linkage fastening plate. At the same time, the pressure relief column ensures the maximum height of the fastener, which facilitates the design of the electrical body limiting structure and avoids damage to the electrical body limiting structure components.

[0008] Preferably, the height of the fixed post is greater than the thickness of the C-type linkage fastening plate, and the movable gap is less than the height of the guide post. Therefore, it can effectively ensure that the guide post will not disengage from the guide hole when the C-type linkage fastening plate moves freely between the fixed posts. During use, the guide post will not protrude from the lower edge of the guide hole and will not obstruct the fastening of the wire.

[0009] Preferably, the top of the fastening nail is provided with a "straw hat" shaped fastening nail head. The "straw hat" shaped fastening nail head adopts an internal hexagonal fastening structure design. At the same time, the outer edge of the internal hexagonal nail head adopts a "straw hat" structure to improve guidance during movement within the electrical appliance body and to improve the strength of the fastening nail head.

[0010] Preferably, the fastening frame is provided with fastening frame fixing holes on both sides, which cooperate with the inverted "T"-shaped threaded hole formed by the circumferential protrusion of the thread to realize the fastening frame assembly; the bottom of the fastening frame is also provided with an anti-loosening groove, which can effectively prevent the fastening wire from separating from or loosening from the electrical body, thereby improving the wiring reliability of the fastener.

[0011] Preferably, the lower end of the C-type linkage fastening plate is provided with two "V"-shaped protrusions. These "V"-shaped protrusions improve the elastic deformation capability of the fastening frame and the reliability of the wire fastening during the wire fastening process. The guide post improves the fastener's ability to concentrate the force of the fastening nail to the two "V"-shaped protrusions of the C-type linkage fastening plate during the wire pressing process. This concentrates the force on the wire fastening, effectively preventing the wire pressing from being unreliable due to the fastening nail in the wiring fastener and the C-type linkage fastening plate being tilted and releasing force during the wire fastening process. This effectively improves the reliability of the fastener pressing the wire.

[0012] Preferably, the C-shaped linkage fastening plate has C-shaped arc surfaces on two sides and two mounting holes on the front. An insulating plate is fixed in the mounting holes. The insulating plate is securely installed with the C-shaped linkage fastening plate by designing two cylindrical fastening protrusions.

[0013] Preferably, the fastening frame has two symmetrical mounting holes on both sides, which are used to fix the insulating block.

[0014] Preferably, the inner side of the insulating block is designed with two symmetrical fastening protrusions to ensure a secure installation between the insulating block and the fastening frame; the insulating block also has two asymmetrical anti-reverse structures on both sides to prevent the fasteners from falling off after installation with the electrical body. Preferably, the limiting surface of the insulating plate is provided with two guide slopes at both ends. These guide slopes provide a good guiding effect for the fastener during the process of tightening or loosening the wire inside the electrical body, avoiding jamming during the movement of the fastener. The insulating plate and insulating block improve the safety insulation performance of the fastener, ensuring that the fastener has high safety insulation protection performance after tightening the wire, thereby improving the overall safety performance of the fastener.

[0015] Preferably, the fastening frame of the fastener adopts a closed "U" structure, with the upper end of the two steel plates folded and the lower steel plate folded over to form an inverted "T" shaped threaded hole structure. This not only increases the height of the threaded hole and the combined strength of the fastening frame and the fastening nail, but also fits the two steel plates together well, making the entire frame a closed "U" structure, thus realizing the main structural design of the fastening frame.

[0016] To improve the overall wiring strength of the product, this invention focuses on the design of the fastening plate and fastening screws. Specifically, the fastening plate is designed with a C-shaped structure. The upper end of the C-shaped linkage fastening plate has a fixing hole that links with the fastening screw, while the lower end features a guide hole, which is particularly important. Due to the presence of the guide hole, the fastening screw remains perpendicular to the wire during the tightening process, ensuring concentrated force on the fastening plate and effectively improving the overall wiring strength of the product. Furthermore, to further enhance the wiring strength and prevent loosening due to thermal expansion and contraction, the C-shaped linkage fastening plate of this invention incorporates a "V"-shaped structure at the bottom wire pressing point and a symmetrical C-shaped structure on the deformable surface of the C-shaped frame to enhance elastic deformation. This effectively improves the elastic deformation during the wire crimping process, enhancing the overall wiring capability and effectively solving the problem of loosening due to thermal expansion and contraction after wire tightening.

[0017] The key to this invention's fastening pin lies in the guide post designed at the tail of the fastening pin, the fixing post designed between the threaded post and the screw head, and the stress-relieving post designed between the guide post and the threaded post. By cooperating with the C-type linkage fastening plate, after the fastening pin passes through the threaded hole of the fastening frame, the guide post at the lower end of the fastening pin passes precisely through the guide hole at the lower end of the C-type plate. This effectively assembles the main components of the fastener together. Through the rational design of the lengths of the fixing post, threaded post, stress-relieving post, and guide post of the fastening pin, the fastening pin ensures that the C-type linkage fastening plate and the fastening pin are always perpendicular to the wire being fastened during the tightening process. This concentrates the force on the fastener throughout the tightening process, preventing tilting and ensuring a secure fastening of the wire.

[0018] Meanwhile, to improve the overall safety and insulation performance of the fastener and components, this invention incorporates an insulating plate on the side of the fastening plate and an insulating block at the bottom of the fastening frame. The application of these two insulating components significantly enhances the overall insulation performance of the fastener.

[0019] The beneficial effects of this invention are as follows: (1) The present invention designs a C-type linkage fastening plate on the fastening nail and the fastening frame, and at the same time, the guide post designed on the fastening nail passes through the C-type linkage fastening plate, so that the fastening nail can always ensure that the C-type linkage fastening plate and the guide post are perpendicular to the fastened wire during the process of fastening the wire, so that the fastener concentrates the force and does not release force during the entire force process, and the wire is fastened firmly.

[0020] (2) During normal use after the conductor is tightened, the present invention can effectively ensure that the conductor will not loosen due to factors such as thermal expansion and contraction during use by means of the combined action of the guide post and the C-type linkage fastening plate through the elastic deformation of the C-type linkage fastening plate.

[0021] (3) The present invention designs an insulating plate on the C-type linkage fastening plate and an insulating block on the fastening frame to ensure that the fastener has high safety insulation protection performance after the wire is fastened, thereby improving the safety performance of the entire fastener.

[0022] (4) The fasteners involved in this invention can be applied to electrical bodies in the field of low-voltage electrical appliances, and are suitable for multi-strand flexible wires and multi-strand flexible wires with cold-pressed ends, as well as for fastening ordinary terminal blocks to electrical bodies. By rationally designing the fastening frame and the fastening stroke of the fastening nails, this invention effectively improves the wiring capability design of the fasteners, and can simultaneously realize on-board wiring and under-board wiring on the electrical body. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a partial cross-sectional view of the present invention; Figure 3This is an isometric view of the fastening frame of the present invention; Figure 4 This is an isometric view of the C-type linkage fastening plate of the present invention; Figure 5 This is an isometric view of the insulating plate of the present invention; Figure 6 This is a plan view of the insulating block of the present invention.

[0024] In the diagram: 1—Connecting fastener, 2—Fastening nail, 3—Fastening frame, 4—C-type linkage fastening plate, 5—Guide post, 6—Relief post, 7—Threaded post, 8—Fixing post, 9—"straw hat" shaped fastening nail head, 10—Fastening frame fixing hole, 11—Inverted "T" shaped threaded hole, 12—Lower end steel plate, 13—Symmetrical mounting hole, 14—Guide hole, 15—"V" shaped protrusion, 16—Mounting hole, 17—C-shaped arc surface, 18—Fixing square hole, 19—Fastening protrusion, 20—Insulating plate, 21—Insulating block, 22—Cylindrical fastening protrusion, 23—Guide slope, 24—Fastening protrusion, 25—Anti-reverse type, 26—Closed "U" shaped structure, 27—Upper end steel plate, 28—C-shaped frame side deformation surface, 29—Anti-loosening groove. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, a wiring fastener for low-voltage electrical appliances includes a fastening nail 2, a fastening frame 3, a C-shaped linkage fastening plate 4, an insulating plate 20, and an insulating block 21. The fastening frame 3 is a hollow square cavity structure. The two end faces of the fastening frame 3 are provided with closed "U"-shaped structures 26. The upper end of the fastening frame 3 is folded into an L-shape with the upper steel plate 27 folded into an L-shape. The upper end fastening frame fixing hole 10 is passed through the inverted "T"-shaped threaded hole 11 opened in the center of the lower steel plate 12, thereby firmly fitting the entire frame together, increasing the height of the threaded hole, and improving the combined strength of the fastening frame 3 and the fastening nail 2.

[0027] like Figure 1 and Figure 2As shown, the fastener 1 is formed by the fastening nail 2 passing through the fixing square hole 18 at the upper end of the C-shaped fastening plate 4, and then through the inverted "T"-shaped threaded hole on the fastening frame 3. When the fixing square hole 18 on the C-shaped fastening plate 4 coincides with the fixing post 8 at the upper end of the fastening nail 2, a fastening protrusion is formed around the fixing square hole by mechanical processing, which restricts the upper end of the C-shaped fastening plate 4 to the area of ​​the fixing post 8 designed on the fastening nail 2 between the fastening nail head 9 and the threaded post 7. At this time, the guide post 5 at the tail of the fastening nail 2 just passes through the guide hole 14 at the lower end of the C-shaped fastening plate 4. Through reasonable design, the fastening nail 2 can always ensure that the C-shaped linkage fastening plate 4 and the fastening nail 2 are perpendicular to the fastened wire during the process of fastening the wire, so that the fastener 1 is subjected to concentrated force and no force leakage during the entire fastening process, and the wire is fastened securely.

[0028] like Figure 1 , Figure 2 and Figure 4 As shown, by designing two "V"-shaped protrusions 15 on the C-shaped fastening plate 4, the C-shaped frame side deformation surface 28, and two symmetrical C-shaped structures on the side, the elastic deformation of the C-shaped fastening plate can be effectively improved, ensuring that the fastener 1 can improve the reliability of the fastener through the C-shaped linkage diagram after fastening the wire.

[0029] like Figure 1 and Figure 2 As shown, the pressure relief post 6 on the fastening nail 1 is designed between the threaded post 7 and the guide post 5. During the loosening process of the fastening nail 2, the pressure relief post 6 can effectively allow the fastening nail 2 to rotate freely in the inverted "T"-shaped threaded hole 11 of the fastening frame 2 after the threaded post 7 on the fastening nail 2 is unscrewed from the fastening frame 3, thus preventing the fastener 1 from being damaged during the user's disassembly of the wire.

[0030] like Figure 1 , Figure 5 and Figure 6 As shown, the insulating plate 20 on fastener 1 is fixed to the mounting holes 16 on the C-shaped fastener 4 via two fastening protrusions 22; the insulating block 21 is fixed to the two symmetrical mounting holes 13 on the fastener frame 3 via two symmetrical fastening protrusions 24. After fastener 1 is equipped with the insulating plate 20 and insulating block 21, its safety insulation performance is significantly improved when combined with electrical components. This ensures that electrical components have high safety insulation protection performance after the wires are tightened, thereby improving the overall safety performance of the fastener.

[0031] The above are merely preferred embodiments of the present invention. It should be noted that, for those skilled in the art, based on the technical teachings provided by the present invention and as common knowledge in the mechanical field, other equivalent modifications and improvements can be made, which should also be considered within the scope of protection of the present invention.

Claims

1. A wiring fastener for low-voltage electrical appliances, characterized in that: comprising a wiring fastener (1), wherein the wiring fastener (1) comprises a fastening frame (3), a fastening nail (2) and a C-shaped linkage fastening plate (4); a guiding post (5) is arranged at the bottom of the fastening nail (2), the fastening nail (2) passes through a guiding hole (14) arranged on the C-shaped linkage fastening plate (4) via the guiding post (5), so that during the process of fastening a wire, the fastening nail (2) can always keep the C-shaped linkage fastening plate (4) and the fastening nail (2) perpendicular to the wire to be fastened, and the stress on the wiring fastener (1) is concentrated in the entire fastening process; through the combined action of the guiding post (5) and the C-shaped linkage fastening plate (4), after the fastener (1) fastens the wire, the elastic deformation of the C-shaped linkage fastening plate (4) can ensure that the wire will not loosen due to factors such as thermal expansion and cold contraction during use, and the reliability of the fastener is improved; a fixing post (8) is arranged on the upper part of the fastening nail (2), the fixing post (8) penetrates through a fixing square hole (18) arranged at the upper end of the C-shaped linkage fastening plate (4) and then is connected by threads into a threaded hole arranged at the upper end of the fastening frame (3); when the fixing post (8) reaches the area where the fixing square hole (18) is located, fastening is achieved through three fastening convex bags (19) formed by extrusion using tooling equipment and arranged around the fixing square hole (18) on the C-shaped linkage fastening plate (4); through the reasonable design of the thread fastening stroke of the fastening nail (2), when the fixing post (8) reaches the area of the fixing square hole (18), the guiding post just passes through the guiding hole (14); a force relief post (6) is designed between the threaded post (7) and the guiding post (5) on the fastening nail (2); during the loosening process of the fastening nail (2), the force relief post (6) can effectively realize that after the threaded post (7) on the fastening nail (2) is unscrewed from the fastening frame (3), the fastening nail (2) can rotate freely in the inverted "T"-shaped threaded hole (11) of the fastening frame via the force relief post (6); the force relief post (6) ensures that the fastening nail (2) will not deform the C-shaped linkage fastening plate (4) during the loosening process, preventing damage to the C-shaped linkage fastening plate (4); meanwhile, the force relief post (6) ensures the maximum height of the fastener (1), facilitates the design of the limiting structure of the electrical appliance main body, and avoids damaging the limiting structural member of the electrical appliance main body; the fastening frame (3) is a hollow square cavity structure, two end faces of the fastening frame (3) are provided with a closed "square" structure (26), the upper end steel plates (27) at the upper end of the fastening frame (3) are each folded into an L shape, and the inverted "T"-shaped threaded hole (11) structure formed at the center of the lower end steel plate (12) passes through the fastening frame fixing hole (10) at the upper end, so that the entire frame body is firmly sleeved together, the height of the threaded hole is increased, and the assembly strength of the fastening frame (3) and the fastening nail (2) is improved.

2. The wiring fastener for low-voltage electrical appliances according to claim 1, characterized in that: The height of the fixed post (8) is greater than the thickness of the C-type linkage fastening plate (4), and the movement gap is less than the height of the guide post (5). Therefore, it can effectively ensure that when the C-type linkage fastening plate (4) moves freely between the fixed posts (8), the guide post (5) will not detach from the guide hole (14). During use, the guide post (5) will not protrude from the lower edge of the guide hole (14) and will not hinder the fastening of the wire.

3. A wiring fastener for low-voltage electrical appliances according to claim 1 or 2, characterized in that: The top of the fastening nail (2) is provided with a "straw hat" type fastening nail head (9). The "straw hat" type fastening nail head (9) adopts an internal hexagonal fastening structure design. At the same time, the outer edge of the internal hexagonal nail head adopts a "straw hat" structure to improve guidance during the movement within the electrical body and to improve the strength of the fastening nail head (9).

4. A wiring fastener for low-voltage electrical appliances according to claim 3, characterized in that: The fastening frame (3) is provided with fastening frame fixing holes (10) on both sides. The fastening frame fixing holes (10) cooperate with the inverted "T"-shaped threaded holes (11) formed by the circumferential convexity of the thread to realize the fastening frame assembly. The fastening frame (3) is also provided with an anti-loosening groove (29) at the bottom. The anti-loosening groove can effectively prevent the fastening wire from separating from or loosening from the electrical body, thereby improving the wiring reliability of the wiring fastener (1).

5. A wiring fastener for low-voltage electrical appliances according to claim 4, characterized in that: The lower end of the C-type linkage fastening plate (4) is provided with two "V"-shaped protrusions (15). During the process of fastening the wire, the "V"-shaped protrusions (15) improve the elastic deformation capability of the fastening frame (3) and the reliability of the wire fastening. The guide post (5) improves the fastener (1) so that the force of the fastening nail (2) is concentrated at the two "V"-shaped protrusions (15) of the C-type linkage fastening plate (4) during the wire pressing process. This concentrates the force on the wire fastening and effectively prevents the wire pressing from being unreliable due to the fastening nail (2) in the wiring fastener (1) and the C-type linkage fastening plate (4) being tilted and releasing force during the wire fastening process. This effectively improves the reliability of the fastener (1) pressing the wire.

6. A wiring fastener for low-voltage electrical appliances according to claim 5, characterized in that: The C-type linkage fastening plate (4) has C-shaped arc surfaces (17) on its two sides and two mounting holes (16) on its front. An insulating plate (20) is fixed in the mounting holes (16). The insulating plate (20) is securely installed with the C-type linkage fastening plate (4) by designing two cylindrical fastening protrusions (22).

7. A wiring fastener for low-voltage electrical appliances according to claim 6, characterized in that: The fastening frame (3) has two symmetrical mounting holes (13) on both sides, which are used to fix the insulating block (21).

8. A wiring fastener for low-voltage electrical appliances according to claim 7, characterized in that: The inner side of the insulating block (21) is designed with two symmetrical fastening protrusions (24) to ensure that the insulating block (21) and the fastening frame (3) are securely installed; the insulating block (21) is also provided with two asymmetrical anti-reverse type (25) on both sides, which can ensure that the fastener (1) and the electrical body do not fall off after installation.

9. A wiring fastener for low-voltage electrical appliances according to claim 8, characterized in that: The limiting surface of the insulating plate (20) is provided with two guide slopes (23) at both ends. The guide slopes (23) provide a good guiding effect for the fastener (1) during the process of tightening or loosening the wire inside the electrical body, and avoid jamming during the movement of the fastener. The insulating plate (20) and the insulating block (21) improve the safety insulation performance of the fastener (1) and ensure that the fastener (1) has a high safety insulation protection performance after tightening the wire, thereby improving the safety performance of the entire fastener.

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