HDMI cable

Abstract

The utility model relates to a kind of HDMI turnover wire, including cable and the plug assembly connected in the both ends of cable, the both ends of woven shielding layer are respectively folded back to form the folding part of the insulating skin layer outside, the folding part is sleeved in the threading hole of metal shielding shell, and the outside of folding part and the threading hole of metal shielding shell is connected into an organic whole by a ring welding layer, the ring welding layer blocks the gap between folding part and the threading hole of metal shielding shell.The utility model makes that plug interior constructs complete and continuous shielding system, forms effective electromagnetic shielding effect.

Description

Technical Field

[0001] This utility model relates to the field of HDMI cable technology, specifically to an HDMI reusable cable. Background Technology

[0002] High Definition Multimedia Interface (HDMI) is a fully digital video and audio transmission interface that can send uncompressed audio and video signals. HDMI cables are mainly used in HDMI signal testing stations for various displays or LCD TVs in electronics factories.

[0003] In the structure of HDMI cables, to effectively resist external electromagnetic interference (EMI) and prevent internal signal leakage, a shielding shell made of materials such as tinplate is usually placed inside the HDMI terminal. This shielding shell constitutes an important part of the entire shielding system, designed to provide electromagnetic shielding for the internal core wires. However, existing traditional HDMI cables have significant shortcomings in their shielding structure. Specifically, the problems mainly occur in two areas: First, at the wire-passing hole on the tinplate shielding shell, there is an unavoidable gap between the wire and the inner wall of the hole. This gap disrupts the continuity of the shielding shell, resulting in a significant decrease in the shielding effect at this point.

[0004] Secondly, gaps or structural openings also exist at the connection between the tinplate shielding shell and the HDMI terminal. These gaps and openings weaken the integrity of the shielding system, making it easier for external electromagnetic interference to penetrate, and internal signals may also leak, ultimately affecting the stability of the overall transmitted signal and the final image / sound quality.

[0005] In summary, the shielding structure of existing HDMI cables has an inherent defect of insufficient continuity, and its shielding effectiveness needs to be further improved, which has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide an HDMI turnaround cable.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: An HDMI reusable cable includes a cable and plug assemblies connected to both ends of the cable. The plug assembly includes a plug shell, a metal shield, and an HDMI terminal. The plug shell covers the outside of the metal shield, and the HDMI terminal is located in the metal shield and connected to it, with its end extending out of the plug shell. The cable includes, from the inside out, a core wire, a braided shield, and an insulating layer. The core wire passes through a through-hole in the metal shield and is electrically connected to the HDMI terminal. Both ends of the braided shield are folded back to form folded portions that cover the outside of the insulating layer. These folded portions fit into the through-hole in the metal shield, and the folded portions are connected to the outside of the through-hole in the metal shield by a ring-shaped solder layer, which seals the gap between the folded portions and the through-hole in the metal shield.

[0008] Furthermore, a tin-plated layer is plated at the junction of the metal shielding shell and the HDMI terminal, which fills and seals the gaps and openings at the junction.

[0009] Furthermore, the rear end of the plug housing is provided with an I-shaped sleeve that is fitted onto the cable, and the length of the I-shaped sleeve is 25mm.

[0010] Furthermore, at least one plug housing has an I-shaped sleeve covered with a heat-shrink tubing.

[0011] Furthermore, the metal shielding shell is formed from tinplate material.

[0012] Furthermore, the braided shielding layer is a braided copper foil layer.

[0013] By adopting the above technical solution, the beneficial effects of this utility model are as follows: 1. This utility model forms an annular welded layer by folding the braided shielding layer backward and welding it to the metal shielding shell in a 360° ring, thus eliminating physical gaps and significantly improving the shielding effect. A tin-plated layer is added at the junction of the metal shielding shell and the HDMI terminal, which can effectively fill and seal the gaps and openings between the metal shielding shell and the HDMI terminal. This design, together with the annular welded layer, forms a complete and continuous shielding structure inside the plug.

[0014] 2. This utility model designs the length of the I-shaped sleeve to be 25mm, forming an effective buffer zone at the junction of the cable and the plug. This effectively buffers the bending force and prevents the bending force from being directly transmitted to the internal solder joint, thereby effectively increasing the bending resistance of the connection between the plug and the cable. In addition, the heat-shrink tubing is wrapped around the outside of the I-shaped sleeve, further dispersing the stress generated during bending over a longer area, further increasing the bending resistance of the connection between the plug and the cable, thus effectively extending the overall service life of the product and making it more suitable for HDMI signal testing scenarios of monitors or LCD TVs. Attached Figure Description

[0015] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments: Figure 1 This is a schematic diagram of an HDMI reusable cable according to the present invention; Figure 2 This is a schematic diagram of the internal connection structure of the cable and plug assembly. Detailed Implementation

[0016] like Figure 1-2 As shown, this utility model provides an HDMI transfer cable that can significantly improve the electromagnetic shielding effectiveness and mechanical reliability of the port. The specific structure is as follows: The HDMI cable includes a cable 1 and plug assemblies 2 connected to both ends of the cable 1. The plug assembly 2 includes a plug housing 21, a metal shielding shell 22, and an HDMI terminal 23. The plug housing 21 is injection molded over the metal shielding shell 22, providing insulation and protection. The HDMI terminal 23 is connected inside the metal shielding shell 22, and the gold finger contact portion of the HDMI terminal 23 extends out of the plug housing 21 for connection to external devices.

[0017] Cable 1 has a multi-layer structure, consisting of a core wire 11, a braided shielding layer 12, and an insulating layer 13 from the inside out. The core wire 11 is used to transmit high-definition video and multi-channel audio signals. The core wire 11 passes through the wire hole 221 at the end of the metal shielding shell 22 and is electrically connected to the rear end of the HDMI terminal 23.

[0018] The metal shielding shell 22 is preferably made of tinplate. Tinplate (tin-plated steel sheet) has good conductivity, shielding and solderability, and is inexpensive and easy to stamp, making it an ideal material for manufacturing shielding shells.

[0019] The braided shielding layer 12 is preferably a braided copper foil layer. Copper has excellent conductivity and shielding effectiveness. By making it into a braided structure, it can provide all-round and efficient electromagnetic shielding while ensuring flexibility.

[0020] The core improvement of this embodiment lies in the innovative connection structure between the braided shielding layer 12 and the metal shielding shell 22. Specifically, both ends of the braided shielding layer 12 are folded backward to form folded portions 121 that are fitted onto the outside of the insulating skin layer 13. The folded portions 121 are fitted onto the inner peripheral wall of the wire hole 221 of the metal shielding shell 22. A 360° circumferential weld is performed along the outer area of ​​the folded portions 121 and the wire hole 221 of the metal shielding shell 22 to form a continuous annular welded layer 3. This annular welded layer 3 not only firmly connects the folded portions 121 and the metal shielding shell 22 into one unit, but also completely seals the physical gaps that exist in the traditional structure, thereby forming a seamless shielding area.

[0021] To further optimize the shielding integrity inside the plug assembly 2, a full ring of tin plating 4 is plated at the junction of the metal shielding shell 22 and the HDMI terminal 23. This tin plating layer 4 effectively fills and seals the gaps and openings between the metal shielding shell 22 and the HDMI terminal 23. The axial length of the tin plating layer 4 is controlled at 3-4 mm to ensure a sufficiently long continuous shielding band. This design, together with the annular solder layer 3, constructs a complete and continuous shielding system inside the plug, effectively blocking the path of external electromagnetic interference intrusion and internal signal leakage.

[0022] A 25mm long I-shaped sleeve 6 is provided at the rear end of the plug housing 21, which is fitted onto the cable. This sleeve creates an effective buffer zone at the junction of the cable 1 and the plug assembly 2, effectively cushioning the bending force and preventing it from being directly transmitted to the solder joint inside the plug. This significantly increases the bending resistance of the connection between the plug assembly 1 and the cable. Furthermore, a heat-shrinkable sleeve 5, approximately 6cm long, is wrapped around the outside of the I-shaped sleeve 6 of at least one plug housing 21. After shrinking under heat, the heat-shrinkable sleeve 5 tightly wraps around the I-shaped sleeve 6 and the cable 1, dispersing the stress on the cable during frequent bending over a longer area. This significantly increases the bending resistance of the connection between the plug assembly 1 and the cable 2, extending the product's lifespan.

[0023] The specific embodiments of this utility model have been described above. However, those skilled in the art should understand that this is only an example. Those skilled in the art can make various changes or modifications to this embodiment without departing from the principle and essence of this utility model, but all such changes and modifications fall within the protection scope of this utility model.

Claims

1. An HDMI reusable cable, comprising a cable and plug assemblies connected to both ends of the cable, the plug assembly comprising a plug housing, a metal shielding shell, and an HDMI terminal, the plug housing covering the outside of the metal shielding shell, the HDMI terminal being located within the metal shielding shell and connected therein, with its end extending out of the plug housing; the cable comprising, from the inside out, a core wire, a braided shielding layer, and an insulating layer, the core wire passing through a through-hole in the metal shielding shell and electrically connected to the HDMI terminal; characterized in that: Both ends of the braided shielding layer are folded back to form folded portions that cover the outside of the insulating skin. These folded portions are fitted into the wire holes of the metal shielding shell, and the folded portions and the outside of the wire holes of the metal shielding shell are connected as one unit by a ring-shaped welding layer. The ring-shaped welding layer seals the gap between the folded portions and the wire holes of the metal shielding shell.

2. The HDMI transfer cable according to claim 1, characterized in that: A tin plating layer is plated at the junction of the metal shielding shell and the HDMI terminal, which fills and seals the gaps and openings at the junction.

3. The HDMI transfer cable according to claim 1, characterized in that: The rear end of the plug housing is provided with an I-shaped sleeve that is fitted onto the cable, and the length of the I-shaped sleeve is 25mm.

4. An HDMI transfer cable according to claim 3, characterized in that: At least one plug housing has an I-shaped sleeve covered with a heat-shrink tubing.

5. An HDMI transfer cable according to claim 1, characterized in that: The metal shielding shell is made of tinplate material.

6. An HDMI transfer cable according to claim 1, characterized in that: The braided shielding layer is a braided copper foil layer.

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