Power cord with good stability and forming die thereof

Abstract

A power line with good stability and a forming die thereof, comprising a wire part and a plug part, the wire part comprising an outer layer and three electric connection wires arranged in the outer layer, the plug part comprising an injection molding layer, a bottom plate wrapped inside the injection molding layer, and three terminals mounted on the bottom plate, the terminals comprising a middle limiting plate, inner connection parts arranged on the upper and lower sides of the middle limiting plate, and outer connection parts, the middle limiting plate being embedded on the bottom plate, the bottom ends of the outer connection parts extending out of the bottom plate below, and the inner connection parts extending out of the bottom plate above, through holes being arranged on the inner connection parts and facing the wire part, and the electric connection wires horizontally extending and penetrating into the corresponding through holes and being fixedly connected with the inner connection parts of the terminals through a welding layer. The power line has good flatness, does not need to be formed, reduces the abnormal probability of looseness, poor contact and the like between the lead wires, the solder layer and the terminals, and improves the stability of the electric connection. The utility model has strong practicability and strong popularization significance.

Description

Technical Field

[0001] This utility model relates to a power cord and its forming mold, and more particularly to a power cord with good stability and its forming mold. Background Technology

[0002] As a key component connecting electrical equipment, the reliability and stability of the power cord plug directly affect the safety and normal operation of the equipment. Currently, during the manufacturing process of power cord plugs, the wire cores are typically soldered to the plug terminals first. Existing three-prong plugs usually have three terminals arranged in a triangular shape, with a straight plate in the middle and V-shaped plates on both sides. Initially, for ease of soldering, the terminals are usually soldered directly along their extension direction. However, to facilitate subsequent injection molding and ensure a smooth finished product, the soldered wire segments need to be flattened (e.g., ...). Figure 1 (As shown); Finally, the flattened plug semi-finished product is placed into the injection mold for injection molding. However, flattening requires applying a large pressure to the wires, which may cause the solder joints to loosen or become loose, or may cause micro-cracks inside the solder, resulting in a decrease in solder strength, which may lead to unstable electrical connections. Utility Model Content

[0003] Therefore, it is necessary to provide a power cord with good stability and its forming mold to address the shortcomings of existing technologies.

[0004] A stable power cord includes a conductor section and a plug section. The conductor section includes an outer layer and three electrical connection wires disposed within the outer layer. The plug section includes an injection-molded layer, a base plate wrapped inside the injection-molded layer, and three terminals mounted on the base plate. Each terminal includes an outer connection part, an inner connection part, and a central limiting plate. The outer connection part and the inner connection part are respectively disposed on the upper and lower sides of the central limiting plate. The central limiting plate is embedded in the base plate. The bottom end of the outer connection part extends below the base plate, and the inner connection part extends above the base plate. The inner connection part has a through hole facing the conductor section. The electrical connection wires extend horizontally and pass through the corresponding through hole, and are fixedly connected to the inner connection part of the terminal through a solder layer.

[0005] Furthermore, a limiting plate is provided at the end of the base plate near the conductor section, and a limiting hole is provided on the limiting plate. The corresponding electrical connection wire passes through the limiting hole at the corresponding position and extends into the terminal through hole.

[0006] Furthermore, the central limiting plate is a horizontal plate structure, which is embedded in or integrally formed on the base plate; the outer connecting part is a long strip-shaped structure extending downwards, and the inner connecting part is a strip-shaped structure extending upwards; the length of the inner connecting part is shorter than that of the outer connecting part.

[0007] Furthermore, the three outer connecting parts are arranged in a triangular pattern, with the cross-section of the middle outer connecting part being horizontal and vertical, and the other two outer connecting parts being arranged in a figure-eight shape.

[0008] Furthermore, it also includes a sleeve, which is fitted onto the conductor portion, with the inner diameter of the sleeve being larger than the outer diameter of the conductor portion, and the conductor portion being movable within the sleeve.

[0009] Furthermore, the outer layer of the conductor extends out of the front end of the sleeve, and the injection molding layer is bonded to the outer surface of the outer layer of the conductor on the front side of the sleeve and the outer surface of the sleeve, with the outer end of the sleeve flush with the outer end of the injection molding layer.

[0010] Furthermore, it also includes a connecting rod, through which the sleeve is connected to the rear end of the base plate.

[0011] Furthermore, the sleeve is made of a high-temperature resistant soft rubber material or has a velvet cloth layer or a rubber layer structure on its inner surface.

[0012] A power cord forming mold is provided for forming the power cord described above. The power cord forming mold includes an upper mold and a lower mold. The upper mold has an upper cavity, and the lower mold has a lower cavity. The lower mold has an installation groove, and a long strip template is detachably installed in the installation groove. Plastic hand-held parts are provided at both ends of the template. Multiple main forming cavities are arranged side by side on the template. Three insertion holes are provided on the bottom surface of the mold cavity. The depth of the three insertion holes is less than the length of the outer connection part of the terminal, so that the bottom plate is suspended after insertion.

[0013] Furthermore, the lower mold cavity includes a main forming cavity and a side forming groove, and a pin is provided in the side forming groove, which is embedded in the groove on the outer surface of the sleeve.

[0014] In summary, the power cord of this invention, by setting terminal soldering positions facing the same direction, makes the electrical connection installation and soldering smoother, eliminating the need for subsequent flattening. This reduces the probability of abnormalities such as loosening and poor contact between the leads, solder layer, and terminals, thus improving the stability of the electrical connection. Furthermore, the inclusion of a sleeve allows for less movement between the wire and the sleeve, preventing bending stress concentration at a single point; it also provides better bending resistance during swing tests. This invention is highly practical and has significant potential for widespread application. Attached Figure Description

[0015] Figure 1 The structure and processing method of traditional power cords;

[0016] Figure 2 One of the internal structural diagrams of a power cord with good stability according to this utility model;

[0017] Figure 3 and Figure 4These are schematic diagrams of two other implementation structures for the power cord;

[0018] Figure 5 This is a partial structural diagram of the molding die of this utility model. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be 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 this utility model and are not intended to limit this utility model.

[0020] like Figure 2 As shown, this utility model provides a power cord with good stability (the injection-molded outer layer is not shown in the figure, but can be referenced). Figure 1 As shown in the figure, the stable power cord includes a conductor part 10 and a plug part 20. The conductor part 10 includes an outer layer 11 and a three-electrical connection wire 12 disposed in the outer layer 11. The plug part 20 includes a base plate 21 and three terminals 22 mounted on the base plate 21. One end of the terminal 22 extends out of the bottom of the base plate 21 and the other end extends out of the top of the base plate 21. The three-electrical connection wire 12 is respectively connected to three corresponding terminals 22.

[0021] The terminal 22 includes an outer connecting portion 221, an inner connecting portion 222, and a central limiting plate 223. The outer connecting portion 221 and the inner connecting portion 222 are respectively disposed on the upper and lower sides of the central limiting plate 223. In this embodiment, the central limiting plate 223 is a horizontal plate structure, which is embedded in or integrally formed on the base plate 21. The outer connecting portion 221 is a downwardly extending strip-shaped structure, and the inner connecting portion 222 is an upwardly extending strip-shaped structure. The length of the inner connecting portion 222 is shorter than that of the outer connecting portion 221.

[0022] In this embodiment, the three outer connecting portions 221 are arranged in a triangular pattern, with the middle outer connecting portion 221 having a horizontal and vertical cross-section, while the other two outer connecting portions 221 are arranged in a figure-eight shape. The inner connecting portion 222 is provided with a through hole 2221, which extends towards the conductor portion 10. The core of the electrical connecting wire 12 passes through the through hole 221 and is folded back around the rear side of the terminal and wound onto the front core. A welding layer is then formed on the outside of the core, further welding and fixing the core to the terminal. At this time, the conductor portion 10 extends horizontally.

[0023] like Figure 3As shown, in another embodiment, the bottom plate 21 has a limiting plate 23 at the end near the conductor portion 10. The limiting plate 23 has limiting holes 231, through which the corresponding electrical connecting wires 12 pass and extend into the terminal through holes 2221. The design of the limiting plate 23 makes the guidance of the electrical connecting wires 12 clearer, and the wires can be pre-inserted and then soldered, without the electrical connecting wires 12 changing position due to shaking.

[0024] like Figure 4 As shown, in another embodiment, the conductor portion 10 is further provided with a sleeve 13, the opening of which is slightly larger than the outer diameter of the conductor portion 10, and the outer layer 11 of the conductor portion 10 extends beyond the front end of the sleeve 13. The plug portion 20 is molded and wrapped with an injection-molded layer on its outer side. This injection-molded layer covers the bottom and top surfaces of the entire base plate 11, the conductor portion 10 on the front side of the electrical connection wire 12 and the sleeve 13, and the outer surface of the sleeve 13. The rear end of the injection-molded layer is flush with the rear end of the sleeve 13. The conductor portion 10 is movable within the sleeve 13, so that when it shakes or bends, the bending stress of the conductor portion 10 will not directly act on the rear end of the injection-molded layer, which can improve the bending resistance to a certain extent, reduce the probability of injection-molded layer cracking and wire core breakage, and improve quality stability.

[0025] Furthermore, the sleeve 13 can be connected to the rear end of the base plate 11 via a thin rod, making positioning more convenient during molding. In this embodiment, both the connecting rod and the sleeve 13 are relatively thin and flexible, not rigid components with high hardness; thus, they can still rotate under external force without breaking or cracking at the rear end of the molded plug. Furthermore, the sleeve 13 can be made of high-temperature resistant soft rubber material, or have a structure with velvet on the inner surface, which not only facilitates the movement of the lead wire 10 within the sleeve 13 but also prevents foreign objects from embedding inside the sleeve.

[0026] like Figure 5 As shown, this embodiment also discloses a power cord forming mold, which includes an upper mold 30 and a lower mold 40. The upper mold 30 is provided with an upper mold cavity, and the lower mold 40 is provided with a lower mold cavity. The lower mold 40 is provided with an installation groove, and a long strip template 41 is detachably installed in the installation groove. Plastic hand-held parts 411 are provided at both ends of the template 41. Multiple main forming cavities 412 are arranged side by side on the template 41. Three insertion holes are provided on the bottom surface of the mold cavity. The depth of the three insertion holes is less than the depth of the terminal, so that the bottom plate is suspended after insertion.

[0027] A side forming groove 413 is provided on the outer side of the mounting groove corresponding to the position of the main forming cavity 412. The side forming groove 413 is designed to gradually decrease in size from the main forming cavity 412 outward. A groove (not shown) is provided on the outer surface of the sleeve 13. Furthermore, the groove is annular or arc-shaped on the outer circumference of the sleeve 13. A pin (not shown) is provided on the bottom surface of the side forming groove. The pin is embedded in the groove to limit the movement of the sleeve.

[0028] In addition, multiple templates 41 are provided for replacement installation. When one is being formed, another is on the outside of the mold. The worker inserts the terminals of the semi-finished part into the template. After the former is formed and the mold is opened, the former is taken out and put into the template with the newly installed semi-finished part, and so on.

[0029] In summary, the power cord of this invention, by setting terminal soldering positions facing the same direction, makes the electrical connection installation and soldering smoother, eliminating the need for subsequent flattening. This reduces the probability of abnormalities such as loosening and poor contact between the leads, solder layer, and terminals, thus improving the stability of the electrical connection. Furthermore, the inclusion of a sleeve allows for less movement between the wire and the sleeve, preventing bending stress concentration at a single point; it also provides better bending resistance during swing tests. This invention is highly practical and has significant potential for widespread application.

[0030] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A power cord with good stability, characterized in that: The device includes a conductor section and a plug section. The conductor section includes an outer layer and three electrical connection wires disposed within the outer layer. The plug section includes an injection-molded layer and a base plate wrapped inside the injection-molded layer, and three terminals mounted on the base plate. The terminals include an outer connection part, an inner connection part, and a central limiting plate. The outer connection part and the inner connection part are respectively disposed on the upper and lower sides of the central limiting plate. The central limiting plate is embedded in the base plate. The bottom end of the outer connection part extends below the base plate, and the inner connection part extends above the base plate. The inner connection part is provided with a through hole facing the conductor section. The electrical connection wires extend horizontally and pass through the corresponding through hole and are fixedly connected to the inner connection part of the terminal through a solder layer.

2. The power cord with good stability as described in claim 1, characterized in that: The bottom plate is provided with a limiting plate at the end near the conductor section. The limiting plate is provided with limiting holes, and the corresponding electrical connection wires pass through the limiting holes at the corresponding positions and extend into the terminal through holes.

3. The power cord with good stability as described in claim 1, characterized in that: The central limiting plate is a horizontal plate structure, which is embedded in or integrally formed on the base plate. The outer connecting part is a long strip-shaped structure extending downward, and the inner connecting part is a strip-shaped structure extending upward. The length of the inner connecting part is shorter than that of the outer connecting part.

4. The power cord with good stability as described in claim 3, characterized in that: The three external connecting parts are arranged in a triangular pattern, with the cross-section of the middle external connecting part being horizontal and vertical, while the other two external connecting parts are arranged in a figure-eight shape.

5. The power cord with good stability as described in claim 1 or 2, characterized in that: It also includes a sleeve, which is fitted onto the conductor portion. The inner diameter of the sleeve is larger than the outer diameter of the conductor portion, and the conductor portion is movable within the sleeve.

6. The power cord with good stability as described in claim 5, characterized in that: The outer layer of the conductor extends out of the front end of the sleeve. The injection molding layer is bonded to the outer surface of the outer layer of the conductor on the front side of the sleeve and the outer surface of the sleeve. The outer end of the sleeve is flush with the outer end of the injection molding layer.

7. The power cord with good stability as described in claim 5, characterized in that: It also includes a connecting rod, through which the sleeve is connected to the rear end of the base plate.

8. The power cord with good stability as described in claim 5, characterized in that: The sleeve is made of high-temperature resistant soft rubber material or has a velvet cloth layer or rubber layer structure on its inner surface.

9. A molding die for a power cord, characterized in that: For forming a power cord according to any one of claims 1 to 8, the power cord forming mold includes an upper mold and a lower mold. The upper mold is provided with an upper mold cavity, and the lower mold is provided with a lower mold cavity. The lower mold is provided with an installation groove, and a long strip template is detachably installed in the installation groove. Plastic hand-held parts are provided at both ends of the template. Multiple main forming cavities are arranged side by side on the template. Three insertion holes are provided on the bottom surface of the mold cavity. The depth of the three insertion holes is less than the length of the outer connection part of the terminal, so that the bottom plate is suspended after insertion.

10. The forming mold for the power cord as described in claim 9, characterized in that: The lower mold cavity includes a main forming cavity and a side forming groove. A pin is provided in the side forming groove, and the pin is embedded in the groove on the outer surface of the sleeve.

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