Stably-connected DC power line

Abstract

The utility model relates to a DC power line with stable connection, which comprises a storage shell and a wire, a rolling shaft is rotatably arranged in the storage shell, the wire is wound on the outer surface of the rolling shaft, the outer surface of the storage shell is provided with a through groove, and the two ends of the wire extend to the outer side of the storage shell from the through groove; two ends of the wire are respectively provided with a connecting end and a DC plug; four sliding blocks are installed on the outer surface of the DC plug in an annular array in a sliding mode, abutting plates are installed on the upper surfaces of the sliding blocks, an expansion mechanism is arranged on the outer surface of the DC plug, and the expansion mechanism can drive the four sliding blocks to expand outwards at the same time. The purpose that the four abutting plates expand outwards at the same time and abut against the inner wall of the jack is achieved by screwing the nut and moving the nut upwards under the action of threaded connection and utilizing the extrusion effect of the second inclined faces and the first inclined faces, the friction force between the abutting plates and the inner wall of the jack can be greatly increased, and the connection firmness is improved.

Description

Technical Field

[0001] This utility model relates to the field of DC power cord technology, specifically a DC power cord with a stable connection. Background Technology

[0002] DC power cables are cables used to transmit direct current (DC). They are commonly found in devices that need to convert alternating current (AC) (such as AC mains power) to DC power, such as household appliances, laptop adapters, LED lights, or electric vehicle charging stations. These cables typically come with connectors of specific specifications (such as round or square plugs) and strictly distinguish between positive and negative terminals to ensure correct current direction and prevent equipment damage.

[0003] Chinese patent CN217882015U discloses a securely connected DC power cord. The cord is designed to work with a protective shell that is movably and pressably mounted on the outside of a PLUG outer mold. A reset elastic element is connected between the outside of the PLUG outer mold and the inside of the protective shell. The reset elastic element provides a forward reset force to the protective shell, thereby improving the connection stability when the DC plug is plugged in.

[0004] However, the aforementioned patent is not convenient for storing the wires. Since the wires have a certain length, they are prone to becoming tangled during use, which not only affects the appearance but may also cause safety hazards or inconvenience. Furthermore, although the aforementioned patent improves the connection stability when the DC plug is plugged in by using an elastic reset component, it can still be easily pulled out, resulting in poor stability. Utility Model Content

[0005] The purpose of this invention is to provide a DC power cable with a stable connection, which effectively solves the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution.

[0007] A securely connected DC power cable includes a housing and a conductor. A winding shaft is rotatably mounted inside the housing, and the conductor is wound around the outer surface of the winding shaft. A through-slot is formed on the outer surface of the housing, and both ends of the conductor extend from the through-slot to the outside of the housing. A connector and a DC plug are respectively provided at both ends of the conductor. Four sliders are slidably mounted in a circular array on the outer surface of the DC plug. An abutment plate is mounted on the upper surface of each slider. An expansion mechanism is provided on the outer surface of the DC plug, which can drive the four sliders to expand outward simultaneously.

[0008] Furthermore, the expansion mechanism includes an external thread formed on the outer surface of the DC plug, a nut being threaded onto the outer surface of the external thread, a first inclined surface being provided on the inner wall of the slider, and a second inclined surface being provided on the outer surface of the nut that matches the first inclined surface.

[0009] Furthermore, a torsion block is rotatably mounted on the outer surface of the storage shell, and the end of the torsion block is connected to the winding shaft. Multiple adjustment holes are arranged in a ring array on the outer surface of the storage shell, and bolts matching the adjustment holes are installed inside the torsion block.

[0010] Furthermore, the inside of the winding shaft has two threading holes, the diameter of which matches the inner diameter of the wire.

[0011] Furthermore, an arc-shaped support block is provided on the outer surface of the take-up shaft, and the arc-shaped support block is positioned between the two threading holes.

[0012] Furthermore, the outer surface of the DC plug has four grooves, inside which slide rods are installed, and on the outer surface of the slide rods are sliding sleeves, with the ends of the sleeves connected to the lower surface of the slider.

[0013] Furthermore, the inner walls on both sides of the through groove are rounded.

[0014] Furthermore, a rubber pad is provided on the outer surface of the abutment plate, and the outer surface of the rubber pad is provided with anti-slip texture.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows.

[0016] 1. This utility model achieves the purpose of winding and releasing the wire by wrapping the wire around the surface of the winding shaft, thereby freely adjusting the length of the wire, avoiding tangling during use, improving aesthetics and neatness, and avoiding safety hazards or inconvenience in use.

[0017] 2. This utility model achieves the purpose of simultaneously expanding outward and pressing against the inner wall of the insertion hole by tightening the nut under the action of the threaded connection, and utilizing the squeezing effect of the second inclined surface and the first inclined surface. This greatly increases the friction between the abutment plate and the inner wall of the insertion hole, and improves the connection firmness. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a cross-sectional structural diagram of the storage shell in this utility model;

[0020] Figure 3 This is a cross-sectional structural diagram of the winding shaft in this utility model;

[0021] Figure 4 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle;

[0022] Figure 5 This is a partial cross-sectional structural diagram of the DC plug in this utility model;

[0023] Figure 6 for Figure 5 Enlarged schematic diagram of the structure at point B.

[0024] In the diagram: 100, storage shell; 101, winding shaft; 102, wire; 103, connecting end; 104, DC plug; 105, slider; 106, abutment plate; 107, through groove; 200, expansion mechanism; 201, external thread; 202, nut; 203, first inclined surface; 204, second inclined surface; 300, torsion block; 301, adjusting hole; 302, bolt; 400, wire hole; 500, arc-shaped support block; 600, groove; 601, sliding rod; 602, sliding sleeve. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, 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. Therefore, they should not be construed as limitations on the embodiments of this utility model.

[0027] In this embodiment of the invention, 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. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0028] Please see Figures 1-6This utility model provides a securely connected DC power cord, comprising a housing 100 and a conductor 102. A winding shaft 101 is rotatably mounted inside the housing 100. The conductor 102 is wound around the outer surface of the winding shaft 101. A through groove 107 is formed on the outer surface of the housing 100, and both ends of the conductor 102 extend from the through groove 107 to the outside of the housing 100. A connecting end 103 and a DC plug 104 are respectively provided at both ends of the conductor 102. Four sliders 105 are slidably mounted in a circular array on the outer surface of the DC plug 104. An abutment plate 106 is mounted on the upper surface of each slider 105. An expansion mechanism 200 is provided on the outer surface of the DC plug 104, which can drive the four sliders 105 to expand outward simultaneously.

[0029] In use, the winding shaft 101 is rotated to wind or unwind the wire 102 as needed to adjust its length. The excess part is then wound up and hidden inside the storage shell 100, which improves the overall aesthetics and neatness and avoids safety hazards or inconvenience caused by scattering during use. After the DC plug 104 is inserted into the socket, there is a certain gap between the abutment plate 106 and the inner wall of the socket. Then, the expansion mechanism 200 drives the four sliders 105 to expand outward at the same time, which in turn drives the four abutment plates 106 to expand outward at the same time, so that they are tightly pressed against the inner wall of the socket, thereby greatly increasing the friction between the abutment plate 106 and the inner wall of the socket and improving the connection firmness.

[0030] Preferably, the expansion mechanism 200 includes an external thread 201 formed on the outer surface of the DC plug 104, a nut 202 threadedly connected to the outer surface of the external thread 201, a first inclined surface 203 provided on the inner wall of the slider 105, and a second inclined surface 204 provided on the outer surface of the nut 202 that matches the first inclined surface 203.

[0031] When the DC plug 104 is inserted into the socket, the nut 202 can be rotated to move it upward under the action of the threaded connection, causing the second inclined surface 204 to press against the first inclined surface 203. Under the action of the pressing force, the four sliders 105 expand outward at the same time, and drive the four abutment plates 106 to press against the inner wall of the socket at the same time, improving the connection firmness. When it is necessary to pull out the DC plug 104, simply rotate the nut 202 in the opposite direction to release the pressure of the second inclined surface 204 on the first inclined surface 203. At this time, cover the slider 105 with your hand to drive the abutment plate 106 to retract inward and separate from the inner wall of the socket, so that it can be easily pulled out of the socket.

[0032] Preferably, a torsion block 300 is rotatably mounted on the outer surface of the storage shell 100, the end of the torsion block 300 is connected to the winding shaft 101, and a plurality of adjustment holes 301 are provided in a ring array on the outer surface of the storage shell 100, and a bolt 302 matching the adjustment hole 301 is installed inside the torsion block 300.

[0033] Rotating the torsion block 300 can drive the winding shaft 101 to rotate, thereby achieving the purpose of winding or unwinding the wire 102. After adjusting the length of the wire 102, screwing the bolt 302 into the adjustment hole 301 at the corresponding position can fix the angle of the winding shaft 101 and the length of the wire 102.

[0034] Preferably, the inside of the winding shaft 101 has two threading holes 400, the diameter of which matches the inner diameter of the wire 102.

[0035] By inserting both ends of the wire 102 into the two threading holes 400 respectively, when the winding shaft 101 is rotated, both ends of the wire 102 can be wound or unwound simultaneously, thereby improving the efficiency of length adjustment.

[0036] Preferably, the outer surface of the take-up shaft 101 is provided with an arc-shaped support block 500, which is disposed between the two threading holes 400.

[0037] By setting the arc-shaped support block 500, the arc-shaped support can be provided for the bend in the middle of the conductor 102, so as to prevent the conductor 102 from breaking due to excessive bending angle.

[0038] Preferably, the outer surface of the DC plug 104 has four grooves 600, a slide rod 601 is installed inside the groove 600, a slide sleeve 602 is slidably installed on the outer surface of the slide rod 601, and the end of the slide sleeve 602 is connected to the lower surface of the slider 105.

[0039] By setting the slider 601 and the sliding sleeve 602, the slider 105 can be limited, so that it can only move horizontally along a fixed path.

[0040] Preferably, the inner walls on both sides of the through groove 107 are rounded.

[0041] To prevent the wire 102 from rubbing against the inner wall of the through groove 107 and causing damage to the wire 102's outer sheath, a rounded corner treatment is used to make the inner wall of the through groove 107 more rounded, reducing the possibility of the wire 102's outer sheath being damaged due to rubbing.

[0042] Preferably, the outer surface of the abutment plate 106 is provided with a rubber pad, and the outer surface of the rubber pad is provided with anti-slip texture.

[0043] The rubber pads and anti-slip textures further increase the friction between the abutment plate 106 and the inner wall of the socket, improving the stability of the connection.

[0044] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A securely connected DC power cord, comprising a housing (100) and a conductor (102), characterized in that: A winding shaft (101) is rotatably mounted inside the storage shell (100). The wire (102) is wound around the outer surface of the winding shaft (101). A through groove (107) is provided on the outer surface of the storage shell (100). Both ends of the wire (102) extend from the through groove (107) to the outside of the storage shell (100). The two ends of the wire (102) are respectively provided with a connecting end (103) and a DC plug (104); The outer surface of the DC plug (104) is slidably mounted with four sliders (105) in a ring array. The upper surface of each slider (105) is fitted with an abutment plate (106). The outer surface of the DC plug (104) is provided with an expansion mechanism (200), which can drive the four sliders (105) to expand outward simultaneously.

2. The DC power cable with a stable connection according to claim 1, characterized in that: The expansion mechanism (200) includes an external thread (201) formed on the outer surface of the DC plug (104), and a nut (202) is threaded onto the outer surface of the external thread (201). The inner wall of the slider (105) is provided with a first inclined surface (203), and the outer surface of the nut (202) is provided with a second inclined surface (204) that matches the first inclined surface (203).

3. The DC power cable with a stable connection according to claim 1, characterized in that: A torsion block (300) is rotatably mounted on the outer surface of the storage shell (100). The end of the torsion block (300) is connected to the winding shaft (101). A plurality of adjustment holes (301) are arranged in a ring array on the outer surface of the storage shell (100). Bolts (302) that match the adjustment holes (301) are installed inside the torsion block (300).

4. A DC power cable with a stable connection according to claim 1, characterized in that: The take-up shaft (101) has two threading holes (400) inside, and the diameter of the threading holes (400) matches the inner diameter of the wire (102).

5. A securely connected DC power cable according to claim 4, characterized in that: The outer surface of the take-up shaft (101) is provided with an arc-shaped support block (500), which is disposed between the two threading holes (400).

6. A DC power cable with a stable connection according to claim 1, characterized in that: The outer surface of the DC plug (104) has four grooves (600), and a slide rod (601) is installed inside the groove (600). A sliding sleeve (602) is slidably installed on the outer surface of the slide rod (601), and the end of the sliding sleeve (602) is connected to the lower surface of the slider (105).

7. A DC power cable with a stable connection according to claim 1, characterized in that: The inner walls on both sides of the through groove (107) are rounded.

8. A DC power cable with a stable connection according to claim 1, characterized in that: The outer surface of the abutment plate (106) is provided with a rubber pad, and the outer surface of the rubber pad is provided with anti-slip texture.

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