Novel high-speed coaxial connector

Abstract

The invention discloses a novel high-speed coaxial connector. The connector comprises an outer conductor; an insulator having a mounting hole penetrating the front and rear ends; the central terminal is fixed in the mounting hole in a penetrating manner; the central terminal comprises a contact area located at the head and a riveting line area located at the tail, and the riveting line area is used for being riveted and fixed with a metal wire core of a coaxial line and forming electrical conduction; on the premise that the size of a matching interface is kept unchanged, the material thickness of the wire riveting area is larger than that of the contact area, so that after the wire riveting area and a small-size metal wire core are riveted and fixed, the riveting cross section area is large, and a cross section cavity is reduced to compensate impedance mutation of other areas, so that the impedance matching of the whole product is balanced, and the purpose of improving the high-frequency performance is achieved; under the condition that the inner diameter of the outer conductor in the high-speed coaxial connector is kept unchanged, the high-speed coaxial connector is suitable for wires with smaller wire diameters, required high-frequency performance is achieved, signal data can be transmitted at a high speed, and the problem of insufficient high-frequency performance caused by the wires is solved.

Description

Technical Field

[0001] This invention relates to the field of connector product technology, and specifically to a novel high-speed coaxial connector. Background Technology

[0002] Existing automotive coaxial connectors generally use the following two wire diameter specifications:

[0003] Thick wire: The representative coaxial cable RG302 has a thicker core and better high-frequency performance, which can meet the high-frequency requirements of 6GHz. However, the wire is relatively stiff and the bending effect is not ideal, making it unsuitable for small gaps.

[0004] Thin wire: The representative coaxial cable RG174 has a thinner core and a softer wire body, making it easy to bend and suitable for smaller gaps. However, when combined with its connector to form a wire harness, its high-frequency performance is slightly worse and cannot meet the high-frequency transmission requirements of 6GHz.

[0005] Combination Figure 1-2 The diagram shows the structure of a high-speed coaxial connector terminal 1 in the prior art. It includes a contact area 11 at the head, a riveting area 12 at the tail, and a main body area 13 connecting the contact area 11 and the riveting area 12. However, the contact area 11 and the riveting area 12 have the same material thickness, and even the entire terminal 1 has the same material thickness. Figure 1 The high-speed coaxial connector shown has a male terminal 1. Figure 2 The high-speed coaxial connector shown has a female terminal (terminal 1). The male and female terminals differ only in their front structure and can be interlocked for electrical communication. Figure 3 As shown.

[0006] The riveting area is used to fix the wire to the wire to form a wire harness. When the wire diameter is thicker, the cross-sectional area of ​​the riveting area is relatively large after riveting, so that the high-frequency performance of the wire harness meets the requirements. However, when the thicker wire is replaced with a thinner wire, the cross-sectional area of ​​the riveting area becomes smaller after riveting due to the smaller diameter of the wire core. Its impedance also changes, and the corresponding high-frequency performance also changes. This will lead to a decrease in the overall high-frequency performance of the wire harness, which will not meet the required high-frequency performance and will affect the signal transmission quality of the wire harness.

[0007] In other words, the existing product structure, theoretically, cannot achieve the required overall high-frequency performance after using thin wires. In order to meet the needs of the above scenarios, a new type of coaxial connector has been invented that is suitable for thin wires and can achieve higher frequency (6GHz) transmission requirements.

[0008] In view of the above, the inventors propose the following technical solution. Summary of the Invention

[0009] The purpose of this invention is to overcome the shortcomings of the prior art and provide a new type of high-speed coaxial connector.

[0010] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The novel high-speed coaxial connector includes: an outer conductor; an insulator having a mounting hole extending through the front and rear ends; and a center terminal, which is fixed in the mounting hole. The center terminal includes a contact area at the head and a riveting area at the tail. The riveting area is used to rivet and fix with the metal core of the coaxial line, forming electrical conductivity. Under the premise that the mating interface size remains unchanged, the material thickness of the riveting area is greater than that of the contact area, so that after the riveting area is riveted and fixed with the small-sized metal core, its riveting cross-sectional area is large and its cross-sectional cavity is small, in order to compensate for impedance abrupt changes in other areas, so as to achieve a balanced impedance matching of the entire product and achieve the purpose of improving high-frequency performance.

[0011] Furthermore, in the above technical solution, the central terminal also includes a main body area connected between the contact area and the riveting area, and the material thickness change node of the contact area and the riveting area is located at any part of the main body area.

[0012] Furthermore, in the above technical solution, the center terminal is made of a metal sheet with a thickness greater than that required for the riveting area. The metal sheet is planed to reduce its thickness, so as to obtain different areas with different thicknesses. Then, the center terminal is made by stamping.

[0013] Furthermore, in the above technical solution, the center terminal is made of a metal sheet with the same thickness as the riveting area, and the metal sheet is rolled by a stamping process to reduce the material thickness at least in the part of the contact area, and then stamped in the mold to form the center terminal; or, the center terminal is made of a metal sheet with the same thickness as the riveting area, and the metal sheet is planed to reduce the material thickness at least in the part of the contact area, and then formed by a stamping process.

[0014] Furthermore, in the above technical solution, the contact area includes at least two integrally bent contact spring arms formed at the front of the main body area. The cross-section of the contact spring arms is arc-shaped, so that an interlocking space is formed between the two contact spring arms.

[0015] Furthermore, in the above technical solution, the front end of the contact spring arm is also folded from the inside out to form a guide portion, and the inner wall of the guide portion forms a convex arc guide surface.

[0016] Furthermore, in the above technical solution, the contact area includes a contact pin formed at the front of the main body area by a rounding process. The front end of the contact pin has a guide cone surface, and the outer surface of the contact pin has gaps distributed along its length.

[0017] Furthermore, in the above technical solution, the main body area is formed with an arc-shaped card from the inside out, and the periphery of the arc-shaped card is connected to the main body area so that there are no cracks between them.

[0018] Furthermore, in the above technical solution, after the riveting area is riveted and fixed to the metal wire core of the coaxial line, the rear end of the riveting area forms a trumpet-shaped protrusion that is smaller at the front and larger at the back, so as to further increase the cross-sectional area of ​​the riveting area, reduce the cross-sectional cavity area, and improve high-frequency performance.

[0019] Furthermore, in the above technical solution, the riveting area includes at least one riveting plate for riveting with the metal core of the wire. The outer side of the end of the riveting plate is formed with an outward protrusion. After the riveting plate is riveted and fixed with the coaxial metal core, the protrusion forms the trumpet-shaped protrusion.

[0020] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0021] 1. This invention, while maintaining the same interface dimensions, increases the thickness of the riveting area in the terminal, meaning the thickness of the riveting area is greater than that of the contact area. This results in a larger riveting cross-sectional area and a smaller cavity after the riveting area is riveted and fixed to the small-sized metal wire core. This compensates for impedance abrupt changes in other areas, ensuring balanced impedance matching of the overall product and improving high-frequency performance. Furthermore, this invention, while maintaining the same inner diameter of the outer conductor in the high-speed coaxial connector, allows for the use of smaller diameter wires within a limited space, achieving the required high-frequency performance. It enables high-speed signal data transmission, solving the problem of insufficient high-frequency performance caused by wire material limitations, giving this invention a strong market competitiveness.

[0022] 2. In addition, the rear end of the riveting area forms a trumpet-shaped protrusion that is smaller at the front and larger at the back, in order to further increase the cross-sectional area of ​​the riveting area, reduce the cross-sectional cavity area, and improve high-frequency performance. Attached Figure Description

[0023] Figure 1 This is a cross-sectional view of the terminal (female terminal) of a high-speed coaxial connector in the prior art.

[0024] Figure 2 This is a cross-sectional view of the male terminal of a high-speed coaxial connector in the prior art.

[0025] Figure 3 This is a cross-sectional view of the terminals of a high-speed coaxial connector in the prior art from another perspective.

[0026] Figure 4 This is a structural diagram of the first structure of the first type of center terminal (female terminal) in this invention.

[0027] Figure 5This is a structural diagram of the second structure of the first type of center terminal (female terminal) in this invention.

[0028] Figure 6 This is a structural diagram of the third structure of the first type of center terminal (female terminal) in this invention.

[0029] Figure 7 This is a perspective view of the first type of center terminal (female terminal) in this invention before it is riveted.

[0030] Figure 8 This is a perspective view of the first type of center terminal (female terminal) after riveting in this invention.

[0031] Figure 9 This is a structural diagram of the first type of center terminal (female terminal) in this invention after being riveted to the coaxial line.

[0032] Figure 10 yes Figure 9 A sectional view along direction AA.

[0033] Figure 11 This is a cross-sectional view of the first high-speed connector in this invention.

[0034] Figure 12 This is a structural diagram of the first structure of the second type of center terminal (male terminal) in this invention.

[0035] Figure 13 This is a structural diagram of the second structure of the second type of center terminal (male terminal) in this invention.

[0036] Figure 14 This is a structural diagram of the third structure of the second type of center terminal (male terminal) in this invention.

[0037] Figure 15 This is a perspective view of the second type of center terminal (male terminal) in this invention before it is riveted.

[0038] Figure 16 This is a perspective view of the first type of center terminal (male terminal) after riveting in this invention.

[0039] Figure 17 This is a cross-sectional view of the second type of high-speed connector in this invention. Detailed Implementation

[0040] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0041] See Figure 4-17As shown, a novel high-speed coaxial connector includes an outer conductor 2, an insulator 3, a center terminal 4, and a coaxial line 5. The center terminal 4 is fixedly connected to the coaxial line 5. The insulator 3 is inserted and fixed inside the outer conductor 2. The center terminal 4 is inserted and fixed inside the insulator 3. The coaxial line 5 extends outside the outer conductor 2, and the outer conductor 2, the insulator 3, and the center terminal 4 are coaxially arranged.

[0042] The insulator 3 has a mounting hole 31 that extends through the front and rear ends; the center terminal 4 is inserted and fixed in the mounting hole 31; the center terminal 4 includes a contact area 41 at the head and a riveting area 42 at the tail, the riveting area 42 is used to be riveted and fixed with the metal wire core 51 of the coaxial line 5 and to form electrical conductivity.

[0043] To ensure high-frequency performance even after replacing the wire with a smaller diameter (and its metal core), the following design was implemented: Structurally, while maintaining the same inner diameter of the outer conductor within the high-speed coaxial connector (i.e., keeping the interface dimensions constant), the thickness of the riveting area 42 in the center terminal 4 is increased. Specifically, the thickness of the riveting area 42 is greater than that of the contact area 41. This results in a larger riveting cross-sectional area and a smaller cavity after the riveting area 42 is fixed to the smaller metal core, compensating for impedance abrupt changes in other areas. This leads to balanced impedance matching across the entire product, improving high-frequency performance. This invention achieves the desired high-frequency performance within a limited space, using a smaller diameter wire while maintaining the same inner diameter of the outer conductor within the high-speed coaxial connector. It enables high-speed signal data transmission, solving the problem of insufficient high-frequency performance caused by wire material limitations, giving the invention strong market competitiveness.

[0044] Combination Figure 3 The image shown is a cross-sectional view of the riveting area 12 of a high-speed coaxial connector terminal in the prior art after riveting a small-sized metal wire core. Its width is CW1 and its height is CH1. Combined with... Figure 10 The image shown is a cross-sectional view of the riveting area 42 of the high-speed coaxial connector terminal of the present invention after riveting a small-sized metal wire core. Its width is CW2 and its height is CH2. Figure 3 and Figure 10 In comparison, it is clear that after riveting small-sized metal wire cores of the same diameter, due to the increased material thickness of the riveting area 42 in this invention, CW2 is greater than CW1, and CH2 is greater than CH1. Figure 10 The cross-sectional area of ​​the rivet section 42 shown is greater than Figure 3 The cross-sectional area of ​​the riveting area 12 shown can be used with wires of smaller diameter while keeping the inner diameter of the outer conductor in the high-speed coaxial connector unchanged, and achieve the required high-frequency performance, thus solving the problem of insufficient high-frequency performance caused by wire material.

[0045] The central terminal 4 also includes a main body area 43 connected between the contact area 41 and the rivet area 42. The thickness change node 40 of the contact area 41 and the rivet area 42 can be located at any part of the main body area 43, which can ensure that the overall thickness of the rivet area 42 is always greater than the thickness of the contact area 41.

[0046] The specific design is as follows:

[0047] like Figure 4 and Figure 14 As shown, the thickness change node 40 of the center terminal 4 is located at the front end of the main body area 43 and near the contact area 41. Of course, the thickness change node 40 of the center terminal 4 is located at the rear end of the main body area 43 and near the riveting area 42.

[0048] like Figure 5 and Figure 12 As shown, the thickness change node 40 of the center terminal 4 is located in the middle of the main body area 43, that is, half of the thickness of the front end of the main body area 43 is equal to the thickness of the contact area 41, and the other half of the thickness of the rear end of the main body area 43 is equal to the thickness of the riveting area 42.

[0049] like Figure 6 As shown, the thickness change node 40 of the center terminal 4 is in the rear part of the main body area 43, that is, the thickness of the front part of the main body area 43 is equal to the thickness of the contact area 41, and the thickness of the middle and rear parts of the main body area 43 is equal to the thickness of the riveting area 42.

[0050] like Figure 13 As shown, the thickness change node 40 of the center terminal 4 is in the front part of the main body area 43, that is, the thickness of the front part of the main body area 43 is equal to the thickness of the contact area 41, and the thickness of the middle and rear parts of the main body area 43 is equal to the thickness of the riveting area 42.

[0051] In the preparation of the center terminal, the present invention selects a metal sheet with a thickness greater than that required for the riveting area 42. The metal sheet is planed to reduce the thickness to obtain different areas with different thicknesses, and then the center terminal is made by stamping.

[0052] Alternatively, in the preparation of the center terminal, the present invention uses a metal sheet with the same thickness as the required thickness of the riveting area 42, and the metal sheet is rolled by a stamping process at least in the part of the contact area 41 to reduce the material thickness, and then stamping is continued in the mold to form the center terminal.

[0053] Alternatively, in the preparation of the center terminal, the present invention uses a metal sheet with the same thickness as the required thickness of the riveting area 42. The metal sheet is planed at least in the part of the contact area 41 to reduce the thickness of the material, and then the center terminal is made by stamping.

[0054] Regardless of the method described above, as long as the material thickness of the riveting area 42 is made greater than that of the contact area 41, the riveting area 42 will have a larger riveting cross-sectional area and a smaller cross-sectional cavity after being riveted and fixed to the small-sized metal wire core. This will compensate for impedance abrupt changes in other areas, resulting in a balanced impedance matching of the overall product and achieving the goal of improving high-frequency performance.

[0055] The contact area 41 includes at least two integrally bent contact spring arms 411 formed at the front of the main body area 43. The cross-section of the contact spring arm 411 is arc-shaped, so that an interlocking space 410 is formed between the two contact spring arms 411.

[0056] The front end of the contact spring arm 411 is also folded from the inside out to form a guide portion 412, and the inner wall of the guide portion 412 forms a convex arc guide surface 413. The center terminal 4 with the above contact area 41 structure is a female terminal, and its riveting area 42 is in the state after riveting is completed as follows. Figure 16 As shown.

[0057] The contact area 41 includes a contact pin 414 formed at the front of the main body area 43 by a rounding process. The front end of the contact pin 414 has a guide cone surface 415, which provides good guidance. The outer surface of the contact pin 414 has slits 416 distributed along its length. The main body area 43 has an arc-shaped card 431 formed from the inside out. The arc-shaped card 431 is connected to the main body area 43 around its periphery, eliminating gaps and increasing the structural strength of the arc-shaped card 431. This allows the arc-shaped card 431 to be held and positioned against the inner wall of the insulator 3, resulting in excellent holding and positioning performance. The center terminal 4 with the above-described contact area 41 structure is a male terminal. The state of its riveting area 42 after riveting is as follows: Figure 17 As shown. The male terminal can be inserted into the mating space 410 of the female terminal to achieve electrical conduction.

[0058] After the riveting area 42 is riveted and fixed to the metal wire core 51 of the coaxial line 5, a trumpet-shaped protrusion 420 with a smaller front and larger rear is formed at the rear end of the riveting area 42 to further increase the cross-sectional area of ​​the riveting area 42, reduce the cross-sectional cavity area and improve high-frequency performance.

[0059] Whether it is a male terminal or a female terminal, the riveting area 42 includes at least one riveting tab 421 for riveting with the metal core of the wire. Generally, there are two riveting tabs 421 in the riveting area 42, both of which are riveted to the metal core of the wire from the outside in, and the edges of the two riveting tabs 421 are in contact with each other to increase the riveting force, making the structure formed after the riveting area 42 and the metal core are riveted more stable and stronger.

[0060] The outer side of the end of the rivet plate 421 is formed with an outward protrusion 422. After the rivet plate 421 is riveted and fixed with the metal wire core 51 of the coaxial line 5, the protrusion 422 forms the trumpet-shaped protrusion 420.

[0061] In summary, the design principle of this invention is as follows: While maintaining the original connector's mating interface dimensions (the interface dimensions must remain excellent, preserving the original size and thickness), a special process is used to increase the overall size (i.e., thicken) of the junction area (i.e., the riveting area) between the center terminal's tail end and the wire harness. This balances the electrical constant between the center terminal and the outer conductor (by using thicker material to increase the junction area size). Furthermore, adjusting the size of the riveting area adjusts the electrical constant between it and the outer conductor (by creating a larger horn shape at the terminal's tail end through the riveting process to increase the junction area size). This makes the high-frequency impedance in this section smoother, achieving better high-frequency transmission performance and addressing the pain point of insufficient high-frequency performance.

[0062] Implementation Principles: Method 1: The product uses a material thicker than required by the original mating interface to meet the large-size requirement of the joint. Additionally, a special stamping process is used to extrude the material to its original thickness to meet the required dimensions at the mating interface. Then, conventional stamping is used to form the standard interface dimensions to satisfy the mating interface requirements. Method 2: Through planing, forging, or compression molding, a thick material is formed into a special material with a front section meeting the interface size requirements and a rear section meeting the joint thickness requirements. This allows for multiple thicknesses of a single material, each corresponding to different functional area requirements. Then, conventional stamping is used to form the standard front interface size and the thickened rear section, similarly fulfilling the structural requirements of two sections with different thicknesses.

[0063] In summary, while maintaining the same interface dimensions, increasing the thickness of the riveting area 22 in terminal 2—that is, making the thickness of the riveting area 42 greater than that of the contact area 41—results in a larger riveting cross-sectional area and a smaller cross-sectional cavity after the riveting area 42 is riveted and fixed to the small-sized metal wire core. This compensates for impedance abrupt changes in other areas, resulting in balanced impedance matching of the overall product and improving high-frequency performance. This invention, while maintaining the same inner diameter of the outer conductor within the high-speed coaxial connector, utilizes smaller diameter wires within a limited space to achieve the required high-frequency performance, enabling high-speed signal data transmission and solving the problem of insufficient high-frequency performance caused by wire material limitations. This gives the invention strong market competitiveness. Furthermore, the rear end of the riveting area 42 forms a flared protrusion 420, smaller at the front and larger at the rear, to further increase the cross-sectional area of ​​the riveting area 42, reduce the cross-sectional cavity area, and improve high-frequency performance.

[0064] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A novel high-speed coaxial connector, comprising: Outer conductor (2); An insulator (3) having a mounting hole (31) that extends through the front and rear ends. A center terminal (4) is inserted and fixed in a mounting hole (31); the center terminal (4) includes a contact area (41) at the head and a riveting area (42) at the tail, the riveting area (42) is used to be riveted and fixed to the metal wire core (51) of the coaxial line (5) and to form an electrical connection; The feature is that, under the premise that the interface size remains unchanged, the material thickness of the riveting area (42) is greater than that of the contact area (41), so that after the riveting area (42) is riveted and fixed with the small-sized metal wire core, its riveting cross-sectional area is large and its cross-sectional cavity is small, so as to compensate for the impedance change in other areas, so as to achieve the overall impedance matching balance of the product and achieve the purpose of improving high-frequency performance.

2. The novel high-speed coaxial connector according to claim 1, characterized in that: The center terminal (4) also includes a main body area (43) connected between the contact area (41) and the rivet area (42), wherein the thickness change node (40) of the contact area (41) and the rivet area (42) is located at any part of the main body area (43).

3. The novel high-speed coaxial connector according to claim 2, characterized in that: The center terminal is made of a metal sheet with a thickness greater than that required for the rivet area (42). The metal sheet is planed to reduce the thickness so as to obtain different areas with different thicknesses. The center terminal is then made by stamping.

4. A novel high-speed coaxial connector according to claim 2, characterized in that: The center terminal is made of a metal sheet with the same thickness as the riveting area (42), and the metal sheet is rolled by a stamping process to reduce the thickness of the material at least in the part of the contact area (41) and then stamped in the mold to form the center terminal; or, the center terminal is made of a metal sheet with the same thickness as the riveting area (42), and the metal sheet is planed to reduce the thickness of the material at least in the part of the contact area (41) and then formed by a stamping process.

5. A novel high-speed coaxial connector according to claim 1, characterized in that: The contact area (41) includes at least two integrally bent contact spring arms (411) formed at the front of the main body area (43). The cross section of the contact spring arm (411) is arc-shaped, so that an interlocking space (410) is formed between the two contact spring arms (411).

6. A novel high-speed coaxial connector according to claim 5, characterized in that: The front end of the contact spring arm (411) is also folded from the inside out to form a guide part (412), and the inner wall of the guide part (412) forms a convex arc guide surface (413).

7. A novel high-speed coaxial connector according to claim 1, characterized in that: The contact area (41) includes a contact pin (414) formed at the front of the main body area (43) by a rounding process. The front end of the contact pin (414) has a guide cone surface (415), and the outer surface of the contact pin (414) has slits (416) distributed along its length direction.

8. A novel high-speed coaxial connector according to claim 7, characterized in that: The main body area (43) is formed with an arc-shaped card (431) from the inside out. The arc-shaped card (431) is connected to the main body area (43) around its periphery, so that there are no gaps between them.

9. A novel high-speed coaxial connector according to any one of claims 1-8, characterized in that: After the riveting area (42) is riveted and fixed to the metal wire core (51) of the coaxial line (5), the rear end of the riveting area (42) forms a trumpet-shaped protrusion (420) that is smaller in the front and larger in the back, so as to further increase the cross-sectional area of ​​the riveting area (42), reduce the cross-sectional cavity area and improve the high-frequency performance.

10. A novel high-speed coaxial connector according to claim 9, characterized in that: The riveting area (42) includes at least one riveting plate (421) for riveting with the metal core of the wire. The riveting plate (421) has an outwardly protruding protrusion (422) formed on the outer side of its end. After the riveting plate (421) is riveted and fixed with the metal core (51) of the coaxial line (5), the protrusion (422) forms the trumpet-shaped protrusion (420).

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