High frequency, low loss and high strength vehicle-mounted antenna whip and base interface

Abstract

The present invention proposes a high-frequency, low-loss, high-strength vehicle-mounted antenna whip and base interface, including a male head and a female seat, the male head includes a first cable, a socket, a first ferrule, a first bushing, a first insulating bushing, and a contact pin; the female seat includes a second cable, a screw sleeve, a second ferrule, a second bushing, a second insulating bushing, a third insulating bushing, a ring, a pin, a jack, and a compression spring. The present invention abandons the plug-in structure and adopts the inner and outer conductor crimping type. In order to reliably connect the inner and outer conductors at the same time, an inner conductor internal compression spring is introduced. After tightening, the outer conductor is in rigid contact and the inner conductor is in elastic contact. It has the structural strength of existing standardized products, high reliability and long service life; the compression spring is designed inside the inner conductor. Since the parameter related to impedance is the outer diameter of the inner conductor, the compression of the compression spring does not affect the impedance characteristics of the interface, and a low-loss coaxial connection is achieved in the high frequency band, which effectively solves the interface problem of the wide-band vehicle-mounted antenna.

Description

Technical Field

[0001] The invention relates to the technical field of vehicle-mounted antennas, and in particular to a whip body and base interface of a high-frequency, low-loss and high-strength vehicle-mounted antenna and an assembly method thereof. Background Art

[0002] The use environment of vehicle-mounted antennas is harsh, requiring the whip to be repeatedly disassembled, the service life of the interface between the whip and the base to be long, and the connection between the whip and the base to be reliable under harsh conditions such as vibration or impact. In recent years, due to the development of broadband technology, the demand for vehicle-mounted antennas has increased to cover high frequency bands above 1000MHz.

[0003] In the high-strength interface between the whip body and the base of the low-frequency vehicle antenna of the current finalized product, to ensure strength, the inner conductor rotates together as a whole when the outer conductor is screwed; to ensure service life, the plug-in connection is not used, but the crimping type is used. In principle, the high-frequency interface structure should try to ensure the impedance continuity of the inner and outer conductors, close to the impedance characteristics of the cable, but in the structure of the existing finalized product, the elastic compression spring as the inner diameter of the outer conductor affects the impedance characteristics, especially whether the compression spring is compressed, the different tolerance accumulation in the length direction, etc., will lead to discontinuous impedance characteristics and cannot be used in the high frequency band.

[0004] In the general high-frequency and low-loss interface, the inner conductor and the outer conductor are separated by an insulating medium and are connected by plug-in. To ensure reliable connection, the jack is made of elastic material. Considering tolerance factors such as concentricity error, the inner and outer conductors do not rotate after insertion, and the threaded connection is achieved by rotating the outer screw sleeve fixed by a retaining ring. The outer screw sleeve fixed by the retaining ring is a weak point in the structural strength. No matter how it is strengthened, this structural principle cannot be changed, and it cannot be applied to the interface between the vehicle-mounted antenna whip and the base. If the outer screw sleeve fixed by the retaining ring is abandoned, the inner and outer conductors of the plug-in interface are connected by rotation, the concentricity error will cause the jack made of elastic material to fail quickly, and the service life will be greatly reduced. Summary of the invention

[0005] In view of this, the present invention proposes a high-frequency, low-loss, high-strength vehicle-mounted antenna whip and base interface to solve the problem that the traditional vehicle-mounted antenna whip and base interface cannot be used in the high frequency band and has a low service life.

[0006] The technical solution of the present invention is implemented as follows: a high-frequency, low-loss, high-strength vehicle-mounted antenna whip and base interface, including a male head and a female seat, the male head includes a first cable, a socket, a first ferrule, a first bushing, a first insulating bushing, and a contact pin; the female seat includes a second cable, a screw sleeve, a second ferrule, a second bushing, a second insulating bushing, a third insulating bushing, a ring, a pin, a jack, and a compression spring; the socket and the screw sleeve are both hollow structures;

[0007] The first ferrule, the first bushing, and the first insulating bushing are sequentially arranged in the socket, the first insulating bushing is sleeved outside the contact pin, the first cable wire passes through and is embedded in the first ferrule and the first bushing in sequence, and the end of the first cable wire is inserted into the contact pin;

[0008] The second ferrule, the second bushing, the second insulating bushing and the third insulating bushing are sequentially arranged in the screw sleeve, the second insulating bushing is sleeved outside the pin, the ring is sleeved outside the third insulating bushing, the jack is embedded in the third insulating bushing, the compression spring is placed in the jack, the end of the jack away from the second insulating bushing protrudes outside the third insulating bushing and the ring, the second cable passes through and is embedded in the second ferrule and the second bushing in sequence, the end of the second cable is inserted into the pin, and the end of the pin away from the second bushing is inserted into the jack and contacts one end of the compression spring;

[0009] The end of the socket is suitable for being inserted into the end of the screw sleeve, and the end of the contact pin away from the first bushing is suitable for abutting against the end of the insertion hole away from the second insulating bushing.

[0010] Optionally, a protrusion is provided at one end of the contact pin away from the first bushing, and a groove is provided at one end of the insertion hole away from the second insulating bushing, and the protrusion is matched with the groove.

[0011] Optionally, the female seat also includes a set screw, and the screw sleeve is provided with a screw hole, the screw hole passes through the inner and outer walls of the screw sleeve, the screw hole is opposite to the circular ring, and the set screw passes through the screw hole and abuts against the circular ring.

[0012] Optionally, the first bushing and the first insulating bushing are both in contact with the inner wall of the socket, and the second bushing, the second insulating bushing and the ring are both in contact with the inner wall of the screw sleeve.

[0013] Optionally, the first cable includes a first sheath wire and a first core wire, and the second cable includes a second sheath wire and a second core wire;

[0014] The first leather wire is sleeved outside the first core wire, the end of the first bushing is placed in the first ferrule, the first leather wire is placed between the first ferrule and the first bushing and is in close contact with the first ferrule and the first bushing respectively, and the first core wire passes through and is embedded in the first ferrule and the first bushing in sequence;

[0015] The second leather wire is sleeved outside the second core wire, the end of the second bushing is placed in the second loop, the second leather wire is placed between the second loop and the second bushing and is in close contact with the second loop and the second bushing respectively, and the second core wire passes through and is embedded in the second loop and the second bushing in turn.

[0016] Optionally, the male connector further includes a first washer, and the female connector further includes a second washer;

[0017] The end of the first bushing is in contact with the end of the first insulating bushing, the first washer is embedded in the first bushing and sleeved outside the first core wire, and the end of the first washer is in contact with the end of the first insulating bushing;

[0018] The end of the second bushing abuts against the end of the second insulating bushing, the second washer is embedded in the second bushing and sleeved outside the second core wire, and the end of the second washer abuts against the end of the second insulating bushing.

[0019] Optionally, one end of the second insulating bushing away from the second bushing abuts against an end of the third insulating bushing.

[0020] The high-frequency, low-loss, high-strength vehicle-mounted antenna whip and base interface of the present invention has the following beneficial effects compared with the prior art:

[0021] (1) The plug-in structure is abandoned and the inner and outer conductors are crimped. In order to reliably connect the inner and outer conductors at the same time, an inner conductor internal compression spring is introduced. After tightening, the outer conductor is in rigid contact and the inner conductor is in elastic contact. The structure is simple, the processing technology is simple, and it is easy to assemble. There is no abnormally high processing accuracy requirement, the cost is low, and at the same time, it has the structural strength of existing standardized products, high reliability, and long service life;

[0022] (2) The core wire and the sheath wire of the cable are stripped as required, and the sheath wire is clamped between the ferrule and the bushing. This nested structure further greatly increases the stability between the structures;

[0023] (3) The compression spring is designed inside the inner conductor. Since the parameter related to impedance is the outer diameter of the inner conductor, the compression of the compression spring does not affect the impedance characteristics of the interface, thus achieving low-loss coaxial connection in the high frequency band and effectively solving the interface problem of wide-band vehicle-mounted antennas. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of the male plug of the present invention;

[0026] Figure 2 It is a structural schematic diagram of the female seat of the present invention.

[0027] Description of reference numerals:

[0028] 10-socket; 11-first cable; 111-first leather wire; 112-first core wire; 12-first ferrule; 13-first bushing; 14-first insulating bushing; 15-first washer; 16-contact pin; 161-protrusion; 20-screw; 21-second cable; 211-second leather wire; 212-second core wire; 22-second ferrule; 23-second bushing; 24-second insulating bushing; 25-second washer; 26-third insulating bushing; 27-ring; 28-pin; 29-socket; 291-groove; 30-compression spring; 31-fastening screw. DETAILED DESCRIPTION

[0029] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] like Figure 1 and Figure 2 As shown, the high-frequency, low-loss, high-strength vehicle-mounted antenna whip and base interface of this embodiment includes a male connector and a female connector, the male connector includes a first cable 11, a socket 10, a first ferrule 12, a first bushing 13, a first insulating bushing 14, a first washer 15, and a contact pin 16; the female connector includes a second cable 21, a screw sleeve 20, a second ferrule 22, a second bushing 23, a second insulating bushing 24, a second washer 25, a third insulating bushing 26, a ring 27, a pin 28, a socket 29, a compression spring 30, and a set screw 31.

[0031] The socket 10 and the screw sleeve 20 of the present embodiment are both hollow structures, preferably hollow ring structures. The first ring 12, the first bushing 13, the first insulating bushing 14, the first washer 15, the second ring 22, the second bushing 23, the second insulating bushing 24, the second washer 25, the third insulating bushing 26, the ring 27, and the jack 29 can also be regarded as long hollow ring structures.

[0032] The first ferrule 12, the first bushing 13, and the first insulating bushing 14 are arranged in sequence in the socket 10. Figure 1For example, they are arranged from left to right. The first insulating bushing 14 is sleeved outside the contact pin 16. The first cable 11 includes a first sheath wire 111 and a first core wire 112. The first sheath wire 111 is sleeved outside the first core wire 112. The end (i.e., the left end) of the first bushing 13 is placed in the first ferrule 12. The first sheath wire 111 is placed between the first ferrule 12 and the first bushing 13 and is in close contact with the first ferrule 12 and the first bushing 13 respectively. The first core wire 112 passes through and is embedded in the first ferrule 12 and the first bushing 13 in sequence. The end of the first core wire 112 exposes the internal wire core and the wire core is inserted into the contact pin 16. The end of the first bushing 13 abuts against the end of the first insulating bushing 14. The first washer 15 is embedded in the first bushing 13 and sleeved outside the first core wire 112. The end of the first washer 15 abuts against the end of the first insulating bushing 14. The outer wall of one end (ie, the right end) of the first bushing 13 close to the first insulating bushing 14 abuts against the inner wall of the socket 10 , and similarly, the outer wall of the first insulating bushing 14 also abuts against the inner wall of the socket 10 .

[0033] The second ferrule 22, the second bushing 23, the second insulating bushing 24, and the third insulating bushing 26 are arranged in sequence in the screw sleeve 20. Figure 2 For example, they are arranged from right to left. The second insulating bushing 24 is sleeved outside the pin 28, the ring 27 is sleeved outside the third insulating bushing 26, the plug hole 29 is embedded in the third insulating bushing 26, the compression spring 30 is placed in the plug hole 29, and the end of the plug hole 29 away from the second insulating bushing 24 protrudes outside the third insulating bushing 26 and the ring 27. The second cable 21 includes a second sheath wire 211 and a second core wire 212. The second sheath wire 211 is sleeved outside the second core wire 212. The end of the second bushing 23 is placed in the second ferrule 22. The second sheath wire 211 is placed between the second ferrule 22 and the second bushing 23 and is in close contact with the second ferrule 22 and the second bushing 23 respectively. The second core wire 212 passes through and is embedded in the second ferrule 22 and the second bushing 23 in sequence. The end of the second core wire 212 exposes the inner wire core and the wire core is inserted into the pin 28. The end of the pin 28 away from the second bushing 23 is inserted into the jack 29 and contacts with one end of the compression spring 30. The second bushing 23, the second insulating bushing 24, and the ring 27 are all in contact with the inner wall of the screw sleeve 20. The end of the second bushing 23 abuts against the end of the second insulating bushing 24, the second washer 25 is embedded in the second bushing 23 and sleeved outside the second core wire 212, and the end of the second washer 25 abuts against the end of the second insulating bushing 24. The end of the second insulating bushing 24 away from the second bushing 23 abuts against the end of the third insulating bushing 26. The screw sleeve 20 is also provided with a screw hole (not shown), the screw hole passes through the inner and outer walls of the screw sleeve 20, the screw hole is opposite to the circular ring 27, and the set screw 31 passes through the screw hole and abuts against the circular ring 27. The end of the contact pin 16 away from the first bushing 13 is provided with a protrusion 161, and the end of the jack 29 away from the second insulating bushing 24 is provided with a groove 291, and the protrusion 161 is adapted to the groove 291.

[0034] When the interface is assembled, the end of the socket 10 is suitable for inserting into the end of the screw sleeve 20 , and the protrusion 161 is suitable for abutting against the groove 291 .

[0035] The interface assembly process of this embodiment is as follows:

[0036] For the male connector, the first cable wire 11 is stripped of the first core wire 112 and the first sheath wire 111 as required. After the first core wire 112 is sequentially installed into the first ferrule 12, the first bushing 13 and the first washer 15, the first core wire 112 and the contact pin 16 are welded with solder wire; the first ferrule 12 is squeezed and deformed by a tool, and the first sheath wire 111 is clamped between the first ferrule 12 and the first bushing 13; finally, the contact pin 16 is installed into the first insulating bushing 14, and then the first ferrule 12, the first bushing 13 and the first insulating bushing 14 are installed as a whole into the socket 10, and the male connector assembly is completed.

[0037] For the female socket, the second cable 21 is stripped of the second core wire 212 and the second sheath wire 211 as required, and after the second core wire 212 is successively transferred into the second ferrule 22, the second bushing 23 and the second washer 25, the second core wire 212 and the pin 28 are welded with solder wire; the second ferrule 22 is squeezed and deformed by a tool, and the second sheath wire 211 is clamped between the second ferrule 22 and the second bushing 23; the compression spring 30 is installed into the socket 29, the socket 29 is installed into the third insulating bushing 26, and the third insulating bushing 26 is installed into the ring 27; then the ring 27 is screwed into the screw sleeve 20, and after tightening, the set screw 31 is installed to fix the ring 27; the pin 28 is installed into the second insulating bushing 24, and then the above-mentioned whole is installed into the screw sleeve 20, and the assembly of the female socket is completed.

[0038] Finally, the right end of the socket 10 can be inserted into the left end of the screw sleeve 20, and the protrusion 161 abuts against the groove 291 to complete the interface connection. Then the first cable 11, the contact pin 16, the jack 29, the pin 28, and the second cable 21 are connected.

[0039] In this embodiment, the abutment between the components initially enhances the stability between the structures. Secondly, the cable is stripped of the core wire and the sheath wire as required, and the sheath wire is clamped between the ferrule and the bushing. This nested structure further greatly increases the stability between the structures. To solve the strength problem, this embodiment abandons the plug-in structure (which requires very high assembly accuracy and processing accuracy) and adopts the inner and outer conductor crimping type. To make the inner and outer conductors reliably connected at the same time, an inner conductor internal compression spring 30 is introduced. After tightening, the outer conductor is in rigid contact and the inner conductor is in elastic contact. The structure is streamlined, the processing technology is simple, and it is easy to assemble. There is no abnormally high processing accuracy requirement, and the cost is low. At the same time, it has the structural strength of existing stereotyped products, high reliability, and long service life.

[0040] In addition, the impedance characteristics of the coaxial structure are determined by the inner diameter of the outer conductor, the outer diameter of the inner conductor, and the dielectric constant of the insulating medium. To apply the interface to the high frequency band, the above three numbers need to be changed synchronously and matched, and one of them cannot change while the other two remain unchanged. The compression spring 30 of this embodiment is designed inside the inner conductor. Since the parameter related to impedance is the outer diameter of the inner conductor, the compression of the compression spring 30 does not affect the impedance characteristics of the interface, and a low-loss coaxial connection is achieved in the high frequency band, which effectively solves the interface problem of the wide-band vehicle-mounted antenna. It has been verified by experiments that the interface of this embodiment can be applied to the high frequency band of 6000MHz.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-frequency, low-loss, high-strength vehicle-mounted antenna whip and base interface, including a male connector and a female connector, characterized in that: The male connector comprises a first cable (11), a socket (10), a first ferrule (12), a first bushing (13), a first insulating bushing (14), and a contact pin (16); the female connector comprises a second cable (21), a screw sleeve (20), a second ferrule (22), a second bushing (23), a second insulating bushing (24), a third insulating bushing (26), a ring (27), a pin (28), a socket (29), and a compression spring (30); the socket (10) and the screw sleeve (20) are both hollow structures; The first ferrule (12), the first bushing (13), and the first insulating bushing (14) are sequentially arranged in the socket (10); the first insulating bushing (14) is sleeved outside the contact pin (16); the first cable (11) passes through and is embedded in the first ferrule (12) and the first bushing (13) in sequence; and the end of the first cable (11) is inserted into the contact pin (16); The second ferrule (22), the second bushing (23), the second insulating bushing (24), and the third insulating bushing (26) are sequentially arranged in the screw sleeve (20); the second insulating bushing (24) is sleeved outside the plug pin (28); the ring (27) is sleeved outside the third insulating bushing (26); the plug hole (29) is embedded in the third insulating bushing (26); the compression spring (30) is placed in the plug hole (29); one end of the plug hole (29) away from the second insulating bushing (24) protrudes outside the third insulating bushing (26) and the ring (27); the second cable (21) passes through and is embedded in the second ferrule (22) and the second bushing (23) in sequence; the end of the second cable (21) is inserted into the plug pin (28); one end of the plug pin (28) away from the second bushing (23) is inserted into the plug hole (29) and contacts with one end of the compression spring (30); The end of the socket (10) is suitable for being inserted into the end of the screw sleeve (20), and the end of the contact pin (16) away from the first bushing (13) is suitable for abutting against the end of the socket (29) away from the second insulating bushing (24); A protrusion (161) is provided at one end of the contact pin (16) away from the first bushing (13), and a groove (291) is provided at one end of the insertion hole (29) away from the second insulating bushing (24), and the protrusion (161) is matched with the groove (291); The first cable (11) comprises a first sheath wire (111) and a first core wire (112), and the second cable (21) comprises a second sheath wire (211) and a second core wire (212); The first leather wire (111) is sleeved outside the first core wire (112), the end of the first bushing (13) is placed in the first ring (12), the first leather wire (111) is placed between the first ring (12) and the first bushing (13) and is in close contact with the first ring (12) and the first bushing (13) respectively, and the first core wire (112) passes through and is embedded in the first ring (12) and the first bushing (13) in sequence; The second leather wire (211) is sleeved outside the second core wire (212), the end of the second bushing (23) is placed in the second ring (22), the second leather wire (211) is placed between the second ring (22) and the second bushing (23) and is in close contact with the second ring (22) and the second bushing (23), respectively, and the second core wire (212) passes through and is embedded in the second ring (22) and the second bushing (23) in sequence.

2. The high-frequency, low-loss, high-strength vehicle-mounted antenna whip and base interface as claimed in claim 1, characterized in that: The female seat also includes a set screw (31). The screw sleeve (20) is provided with a screw hole, which passes through the inner and outer walls of the screw sleeve (20). The screw hole is directly opposite to the circular ring (27). The set screw (31) passes through the screw hole and abuts against the circular ring (27).

3. The high-frequency, low-loss, high-strength vehicle-mounted antenna whip and base interface as claimed in claim 1, characterized in that: The first bushing (13) and the first insulating bushing (14) are both in contact with the inner wall of the socket (10), and the second bushing (23), the second insulating bushing (24) and the ring (27) are both in contact with the inner wall of the screw sleeve (20).

4. The high-frequency, low-loss, high-strength vehicle-mounted antenna whip and base interface as claimed in claim 3, characterized in that: The male connector also includes a first washer (15), and the female connector also includes a second washer (25); The end of the first bushing (13) abuts against the end of the first insulating bushing (14); the first washer (15) is embedded in the first bushing (13) and sleeved outside the first core wire (112); the end of the first washer (15) abuts against the end of the first insulating bushing (14); The end of the second bushing (23) abuts against the end of the second insulating bushing (24); the second washer (25) is embedded in the second bushing (23) and sleeved outside the second core wire (212); the end of the second washer (25) abuts against the end of the second insulating bushing (24).

5. The high-frequency, low-loss, high-strength vehicle-mounted antenna whip and base interface as claimed in claim 4, characterized in that: One end of the second insulating bushing (24) away from the second bushing (23) abuts against the end of the third insulating bushing (26).

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