Vehicle radio frequency connector

Abstract

The utility model discloses a radio frequency connector for a vehicle, which comprises an outer conductor, a front section of a hollow tube body formed by the outer conductor is coated with an insulating rubber core provided with a central conductor, and the central conductor is coupled to a conductive copper wire of a coaxial cable to form electrical connection of signals; a rear section of the hollow tube body is coated with a crimping sleeve and an outer skin of the coaxial cable, the crimping sleeve is a net-shaped conductor which is exposed at one end part of the coaxial cable in a crimping manner, and a free end of the net-shaped conductor forms a reflexed section which is in contact with the outer conductor at an outer end edge of the crimping sleeve; the outer conductor, the crimping sleeve and the net-shaped conductor are electrically connected with each other in a grounding manner; a rear section of the insulating rubber core is provided with a concave ring portion sleeved with a metal ring, and the metal ring is in contact with the outer conductor so as to adjust the distance from the outer conductor to the central conductor.

Description

Technical Field

[0001] The present invention relates to the field of electrical connectors, and particularly to a vehicle radio frequency connector. Background Art

[0002] Electrical connectors are commonly seen in electrical products, and their main purpose is to transmit power or signals. Therefore, electrical connectors have been widely used in the connection of information products and are indispensable components.

[0003] In practical applications, electrical connectors are not only used in the aforementioned electrical products, but also widely used in the circuit systems of automobiles and locomotives for line connection. Taking the FAKRA (Fachkreis Automobil, Automotive Professional Team) connector as an example, it was initially used for connecting the in-vehicle radio antenna. Now, the FAKRA specification has become a general standard radio frequency connector in the automotive industry and is widely used in the industry.

[0004] As Figures 1 to 3 shown, it shows a three-dimensional exploded view, an assembled three-dimensional view of an existing vehicle radio frequency connector, and a cross-sectional view taken along line A-A. As Figure 2 shown, the vehicle radio frequency connector includes a coaxial cable 10, a crimping sleeve 20, a center conductor 30, an insulating rubber core 40, and an outer conductor 50. Figure 1

[0005] The coaxial cable 10 includes a conductive copper wire 101 located at the central part and a mesh conductive body 102 covered by an outer skin 103 on the outer peripheral surface. The crimping sleeve 20 is crimped to the mesh conductive body 102 exposed at one end of the coaxial cable 10, and a free end of the mesh conductive body 102 forms a folded section at the outer edge of the crimping sleeve 20. The center conductor 30 is coupled to the conductive copper wire 101 to form signal connection, and the insulating rubber core 40 is used for sleeving and positioning the center conductor 30; and the outer conductor 50 uses bending and crimping processes to cover a front section of a formed hollow tube on the center conductor 30 and the insulating rubber core 40, and a rear section of the hollow tube covers the crimping sleeve 20 and the outer skin 103 of the coaxial cable 10, so that the outer conductor 50, the crimping sleeve 20, and the mesh conductive body 102 form electrical connection, thus completing the assembly of the vehicle radio frequency connector as Figure 2 shown.

[0006] Figure 3 The outer peripheral surface of the outer conductor 50 is respectively provided with a first rib 501, a second rib 502, and a third rib 503 to facilitate the insertion of the vehicle radio frequency connector into a connector socket (not shown in the drawings). As Figure 3As shown, the third rib 503 extends a tapered slope 503a in the direction of the coaxial cable 10. It can be clearly seen from the figure that the lower end of the tapered slope 503a contacts the mesh conductor 102 and forms a gap G therebetween. Since the dielectric constant of the air (equal to 1) in the gap G is inconsistent with the dielectric constant of the insulating layer of the coaxial cable 10 (approximately between 4.2 and 4.7), the characteristic impedance of the coaxial cable 10 has an impedance mismatch at this point and a significant return loss and insertion loss occur before 6 GHz, resulting in the characteristic impedance bandwidth of the existing automotive RF connector not reaching 6 GHz, that is, it fails to meet the specification of USCAR (United States Council for Automotive Research LLC). This is a problem that urgently needs to be overcome by relevant industries. SUMMARY OF THE INVENTION

[0007] The main purpose of this case is to provide an automotive RF connector in view of the deficiencies of the prior art. It can minimize an impedance mismatch phenomenon by reducing the gap inside an outer conductor and adjusting the distance from the outer conductor to a central conductor, so that the characteristic impedance bandwidth of the automotive RF connector in this case can reach 6 GHz required by USCAR.

[0008] To achieve the foregoing purpose, the technical means adopted in this case is to provide an automotive RF connector, including an outer conductor. A front section of a hollow tube formed by the outer conductor covers an insulating rubber core provided with a central conductor, wherein the central conductor is coupled to a conductive copper wire of a coaxial cable to form an electrical connection of a signal; a rear section of the hollow tube covers a crimping sleeve and an outer skin of the coaxial cable. The crimping sleeve is crimped to a mesh conductor exposed at one end of the coaxial cable. A free end of the mesh conductor forms a folded-back section in contact with the outer conductor at an outer edge of the crimping sleeve, so that the outer conductor, the crimping sleeve and the mesh conductor form a grounded electrical connection; a rear section of the insulating rubber core is provided with a concave ring portion for sleeving a metal ring, wherein the metal ring is in contact with the outer conductor to adjust the distance from the outer conductor to the central conductor.

[0009] In an embodiment, a first rib, a second rib and a third rib are respectively provided on an outer peripheral surface of the outer conductor, and both side surfaces of the first rib, the second rib and the third rib are vertical upright surfaces relative to the outer peripheral surface of the outer conductor.

[0010] This case can provide the following advantages:

[0011] The vehicle - used RF connector in this case can minimize an impedance mismatch phenomenon by reducing the voids inside the outer conductor and adjusting the distance from the outer conductor to the center conductor, so that the characteristic impedance bandwidth of the vehicle - used RF connector in this case can reach 6 GHz required by USCAR. Brief Description of the Drawings

[0012] The following further specifically describes the present invention in conjunction with the drawings and specific embodiments, and the above - mentioned and / or other advantages of the present invention will become clearer.

[0013] Figure 1 is an exploded perspective view of an existing vehicle - used RF connector;

[0014] Figure 2 is Figure 1 the perspective view of the assembled vehicle - used RF connector shown;

[0015] Figure 3 is Figure 2 the sectional view taken along line A - A;

[0016] Figure 4 is an exploded perspective view of the vehicle - used RF connector in this case;

[0017] Figure 5 is Figure 4 the perspective view of the assembled vehicle - used RF connector shown;

[0018] Figure 6 is Figure 5 the sectional view taken along line B - B;

[0019] Figure 7 is a comparison diagram of the wave impedance of the vehicle - used RF connector in this case and the wave impedance of the existing vehicle - used RF connector;

[0020] Figure 8a is a comparison diagram of the insertion loss of the vehicle - used RF connector in this case and the insertion loss of the existing vehicle - used RF connector;

[0021] Figure 8b is a comparison diagram of the return loss of the vehicle - used RF connector in this case and the return loss of the existing vehicle - used RF connector.

[0022] Explanation of the Reference Numerals in the Drawings:

[0023] In the solution of the present invention (attached Figures 4 - 6 ):

[0024] Coaxial cable 1 Conductive copper wire 11

[0025] Mesh conductor 12 Outer sheath 13

[0026] Crimping sleeve 2, center conductor 3

[0027] Insulating rubber core 4, concave ring part 41

[0028] Outer conductor 5, first rib 51

[0029] Second rib 52, third rib 53

[0030] Metal ring 6

[0031] In the background art (attached Figures 1 - 3 ):

[0032] Coaxial cable 10, conductive copper wire 101

[0033] Mesh conductor 102, outer sheath 103

[0034] Crimping sleeve 20, center conductor 30

[0035] Insulating rubber core 40, outer conductor 50

[0036] First rib 501, second rib 502

[0037] Third rib 503, tapered slope 503a

[0038] Gap G Detailed implementation manner

[0039] As Figures 4 to 6 shown, it discloses a vehicle radio frequency connector, which has the same specifications as the existing vehicle radio frequency connector. Therefore, the vehicle radio frequency connector in this case includes a coaxial cable 1, a crimping sleeve 2, a center conductor 3, an insulating rubber core 4, an outer conductor 5, and a metal ring 6.

[0040] The coaxial cable 1 includes a conductive copper wire 11 located at the central part and a mesh conductor 12 covered by an outer sheath 13 on the outer peripheral surface for signal transmission and grounding.

[0041] The crimping sleeve 2 is crimped to the mesh conductor 12 exposed at one end of the coaxial cable 1, and a free end of the mesh conductor 12 forms a folded section at the outer edge of the crimping sleeve 2, so that the crimping sleeve 2 and the mesh conductor 12 form a grounded electrical connection.

[0042] The center conductor 3 is coupled to the conductive copper wire 11 of the coaxial cable 1 to form an electrical connection of the signal, so that one side of the center conductor 3 is connected to the coaxial cable 1 with the crimping sleeve 2.

[0043] After the insulating rubber core 4 is sleeved and positioned on the center conductor 3, the center conductor 3 is placed inside the insulating rubber core 4, and the insulating rubber core 4 provides insulation between the center conductor 3 and the outer conductor 5.

[0044] The outer conductor 5 is formed by bending and crimping processes. A front section of a hollow tube body is wrapped with the insulating rubber core 4 of the center conductor 3, and a rear section of the hollow tube body further wraps the crimping sleeve 2 and the outer skin 13 of the coaxial cable 1, so that the outer conductor 5, the crimping sleeve 2 and the mesh conductor 12 form a grounded electrical connection.

[0045] The overall structure of this vehicle - used RF connector is different from that of existing vehicle - used RF connectors in that the outer peripheral surface of the outer conductor 5 is respectively provided with a first rib 51, a second rib 52 and a third rib 53. Both side surfaces of the first rib 51, the second rib 52 and the third rib 53 are perpendicular to the outer peripheral surface of the outer conductor 5, which is a vertical surface design. This can effectively reduce the voids inside the outer conductor 5 to reduce the high - frequency impedance generated due to the presence of the dielectric. Furthermore, a concave ring portion 41 is provided at the rear section of the insulating rubber core 4, and the metal ring 6 is further sleeved on the concave ring portion 41. Please refer to Figure 6 , the metal ring 6 is in contact with the outer conductor 5 to adjust the distance between the outer conductor 5 and the center conductor 3, thereby reducing the influence of the electromagnetic field on high - frequency transmission.

[0046] Therefore, through the vertical surface design of the ribs 51, 52 and 53 on the outer conductor 5 and the design of the metal ring 6 added between the outer conductor 5 and the center conductor 3, and then through the implementation of the foregoing assembly process, the three - dimensional diagram of the vehicle - used RF connector as shown in Figure 5 can be completed, which is beneficial for the vehicle - used RF connector to be inserted into a connector socket (not shown in the attached drawings). Furthermore, the internal structure and component configuration related to this vehicle - used RF connector are shown in Figure 6 the sectional view shown.

[0047] As shown in Figure 6As shown in the figure, the vehicle radio frequency connector includes an insulating rubber core 4 covering the front section of the hollow tube of the outer conductor 5 and covering the center conductor 3, and the center conductor 3 is coupled to the conductive copper wire 11 of the coaxial cable 1 to form an electrical connection for signals. The rear section of the hollow tube further covers the crimping sleeve 2 and the outer skin 13 of the coaxial cable 1, and the crimping sleeve 2 is crimped to the mesh conductive body 12 exposed at one end of the coaxial cable 1. The free end of the mesh conductive body 12 forms a folded section in contact with the outer conductor 5 at the outer edge of the crimping sleeve 2, so that the outer conductor 5, the crimping sleeve 2 and the mesh conductive body 12 form a grounded electrical connection. A concave ring portion 41 for sleeving the metal ring 6 is provided at the rear section of the insulating rubber core 4, so that the metal ring 6 is in contact with the outer conductor 5, thereby adjusting the distance from the outer conductor 5 to the center conductor 3.

[0048] Furthermore, both side surfaces of the ribs 51, 52 and 53 of the outer conductor 5 are designed as vertical surfaces perpendicular to the outer peripheral surface of the outer conductor 5 to reduce the voids inside the outer conductor 5, thereby minimizing the impedance mismatch phenomenon of the coaxial cable 1 and significantly improving the characteristic impedance bandwidth of the coaxial cable 1.

[0049] As Figure 7 shown, it shows a comparison diagram of the wave impedance Z1 of the vehicle radio frequency connector in this case and the wave impedance Z2 of the existing vehicle radio frequency connector. As Figure 7 shown, impedance mismatches of the wave impedance Z2 result in 70 ohms and 63 ohms, which are much higher than 50 ohms; while in this case, the impedance mismatch can be significantly reduced and the wave impedance Z1 can be suppressed below 55 ohms.

[0050] In addition, as Figure 8a and Figure 8b shown, among them, Figure 8a shows a comparison diagram of the insertion loss IL1 of the vehicle radio frequency connector in this case and the insertion loss IL2 of the existing vehicle radio frequency connector; Figure 8b shows a comparison diagram of the return loss RL1 of the vehicle radio frequency connector in this case and the return loss RL2 of the existing vehicle radio frequency connector. As Figure 8a shown, the insertion loss IL1 of the vehicle radio frequency connector in this case is less than a standard insertion loss IL0 within the frequency bandwidth of 6 GHz, while the insertion loss IL2 of the existing vehicle radio frequency connector is higher than the standard insertion loss IL0 after about 3.7 GHz; and as Figure 8b shown, the return loss RL1 of the vehicle radio frequency connector in this case is lower than a standard return loss RL0 within the frequency bandwidth of 6 GHz, while the return loss RL2 of the existing vehicle radio frequency connector is higher than the standard return loss RL0 after about 3.7 GHz.

[0051] According to the above description, the present case can provide the following advantages:

[0052] The vehicle radio frequency connector of the present case can minimize an impedance mismatch phenomenon by reducing the voids inside the outer conductor and adjusting the distance from the outer conductor to the center conductor, so that the characteristic impedance bandwidth of the vehicle radio frequency connector of the present case can reach 6 GHz required by USCAR.

[0053] The present invention provides an idea and method for a vehicle radio frequency connector. There are many methods and ways to specifically implement this technical solution. The above description is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention. Each component not clearly defined in this embodiment can be implemented by existing technologies.

Claims

1. A vehicle radio frequency connector includes an outer conductor (5). A front section of a hollow tube formed by the outer conductor (5) wraps an insulating rubber core (4) provided with a center conductor (3). The center conductor (3) is coupled to a conductive copper wire (11) of a coaxial cable (1) to form an electrical connection of signals. A rear section of the hollow tube wraps a crimping sleeve (2) and an outer skin (13) of the coaxial cable (1). The crimping sleeve (2) is crimped to a mesh conductive body (12) exposed at one end of the coaxial cable (1). A free end of the mesh conductive body (12) forms a folded-back section in contact with the outer conductor (5) at an outer edge of the crimping sleeve (2), so that the outer conductor (5), the crimping sleeve (2) and the mesh conductive body (12) form a grounded electrical connection; It is characterized in that A rear section of the insulating rubber core (4) is provided with a concave ring portion (41) for sleeving a metal ring (6). The metal ring (6) is in contact with the outer conductor (5) to adjust the distance between the outer conductor (5) and the center conductor (3).

2. The vehicle radio frequency connector according to claim 1, wherein The outer peripheral surface of the outer conductor (5) is respectively provided with a first rib (51), a second rib (52) and a third rib (53). Both side surfaces of the first rib (51), the second rib (52) and the third rib (53) are vertical surfaces perpendicular to the outer peripheral surface of the outer conductor (5).

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