A seamless jack inner conductor, coaxial connector and converter

Abstract

The present invention discloses a seamless jack inner conductor, a coaxial connector and a converter. The seamless jack inner conductor includes a conductor sleeve, a sleeve connector, a spring contact and an elastic compression member. The conductor sleeve is a hollow tube body, the front end tube mouth is provided with a first annular convexity convex inwardly, and the rear end tube mouth is connected to the sleeve connector. A first inner annular cone surface is provided between the inner side of the first annular convexity and the inner wall of the conductor sleeve body. The spring contact and the elastic compression member are arranged in the tube body of the conductor sleeve. The spring contact is composed of a contact root and a contact claw. The contact claw is a spring claw structure composed of a plurality of annular claw petals. The elastic compression member is arranged between the contact root and the connecting part of the sleeve connector end. A second annular convexity is provided on the inner side of the annular claw petal end of the spring claw structure, and an outer annular cone surface is provided on the outer side. The outer annular cone surface matches the first inner annular cone surface, so that the outer annular cone surface is closely attached to the first inner annular cone surface.

Description

Technical Field

[0001] The invention relates to a coaxial connector, in particular to a radio frequency coaxial connector. Background Art

[0002] Precision coaxial connectors used in radio frequency and microwave transmission technologies usually include components such as inner conductors, insulating supports and outer conductors. Among them, the inner conductor can be divided into pin inner conductors and socket inner conductors according to the interface structure. Among them, the coaxial connector with a pin inner conductor is a coaxial male connector or a male connector, and the coaxial connector with a socket inner conductor is a coaxial female connector or a female connector. When the pin inner conductor of the coaxial male connector is inserted into the socket inner conductor of the coaxial female connector, the electrical connection of the two coaxial connectors is achieved. Existing N-type, 3.5mm, 2.4mm and other coaxial female connectors use slotted socket inner conductors. The slotting destroys the continuity of the transmission surface, resulting in a decrease in the quality of microwave signal transmission and deterioration of indicators, which cannot meet the requirements of precision testing. Summary of the invention

[0003] The problem to be solved by the present invention is that the existing coaxial female connector adopts a slotted jack inner conductor, and the slotting destroys the continuity of the transmission surface, resulting in a decrease in the transmission quality of microwave signals.

[0004] To solve the above problems, the solution adopted by the present invention is as follows:

[0005] A seamless jack inner conductor according to the present invention comprises a conductor sleeve, a sleeve connector, a spring contact and an elastic compression member; the conductor sleeve is a hollow tube body, the front end of the tube mouth is provided with a first annular protrusion convex inwardly, and the rear end of the tube mouth is connected to the sleeve connector; a first inner circular cone surface is provided between the inner side of the first annular protrusion and the inner wall of the conductor sleeve body; the spring contact and the elastic compression member are arranged in the tube body of the conductor sleeve; the spring contact consists of a contact root and a contact claw; the contact claw is installed on the contact root; the contact claw is a plurality of grooves opened along the axial direction The hollow tube body enables the claw of the contact piece to form a spring claw structure composed of a plurality of annular claw petals; the outer diameter of the claw of the contact piece matches the inner diameter of the conductor sleeve; the claw mouth of the spring claw structure faces the front end; the elastic compression member is arranged between the connecting portion of the root of the contact piece and the end of the sleeve connector, so that the elastic compression member provides a forward axial thrust to the spring claw structure; a second annular convex is arranged on the inner side of the end of the annular claw petal of the spring claw structure, and an outer annular conical surface is arranged on the outer side; the outer annular conical surface matches the first inner annular conical surface, so that the outer annular conical surface is closely attached to the first inner annular conical surface.

[0006] Further, according to a seamless jack inner conductor of the present invention, a second inner annular conical surface is provided between the second annular convexity on the inner side of the end of the annular claw petal of the spring claw structure and the end surface.

[0007] Furthermore, a connecting portion is provided at the end of the sleeve connector; the connecting portion is a cylinder whose diameter is smaller than that of the sleeve connector body; the diameter of the connecting portion matches the inner diameter of the conductor sleeve, so that the connecting portion at the end of the sleeve connector can be inserted into the tail end pipe opening of the conductor sleeve to achieve connection with the conductor sleeve.

[0008] Furthermore, according to a seamless jack inner conductor of the present invention, the number of the slots is 3 to 8.

[0009] Further, according to a seamless jack inner conductor of the present invention, the elastic compression member is an axial spring.

[0010] Furthermore, according to a seamless jack inner conductor of the present invention, the inner diameter of the first annular protrusion is the same as the inner diameter of the second annular protrusion.

[0011] Furthermore, according to a seamless jack inner conductor of the present invention, the angle between the first inner annular cone surface and the axial direction is 45 degrees.

[0012] According to a coaxial connector of the present invention, the coaxial connector is a coaxial female connector, and the above-mentioned seamless jack inner conductor is axially arranged at the center of the end of the coaxial female connector.

[0013] A converter according to the present invention includes a converter housing; two connecting cavities are respectively provided at both ends of the converter housing; the two connecting cavities are respectively installed with the above-mentioned seamless jack inner conductor; the two seamless jack inner conductors in the two connecting cavities are arranged oppositely and share a pipe sleeve connector; the two seamless jack inner conductors are connected through the shared pipe sleeve connector; the pipe sleeve connector is installed in the converter housing through an insulating fixing piece.

[0014] The technical effects of the present invention are as follows: the present invention adopts a seamless inner conductor structure and installs an elastic contact piece in the inner conductor hole of the jack, which not only ensures the integrity of the inner conductor surface, but also satisfies the good electrical connection of the pin and jack. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the seamless jack inner conductor according to an embodiment of the present invention.

[0016] Figure 2 and Figure 3 This is an enlarged view of the cooperation between the front end of the conductor sleeve and the annular claw of the spring contact member in the embodiment of the present invention. Figure 2 This is the state when the inner conductor of the pin is inserted into the inner conductor of the seamless socket. Figure 3 This is the state when the inner conductor of the pin is not inserted into the inner conductor of the seamless socket.

[0017] Figure 4 It is a schematic diagram of the disassembled structure of the conductor sleeve and the sleeve connector.

[0018] Figure 5 FIG. 4 is an end view of a spring contact according to an embodiment of the present invention.

[0019] Figure 6 It is a schematic structural diagram of a coaxial connector embodiment of the present invention in which the male head and the female head are separated.

[0020] Figure 7 It is a structural schematic diagram of the connection between the male head and the female head of the coaxial connector embodiment of the present invention.

[0021] Figure 8 Schematic diagram of the structure of a converter embodiment of the present invention. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below with reference to the accompanying drawings.

[0023] Example 1

[0024] This embodiment is a seamless jack inner conductor. Figure 1 As shown, it includes a conductor sleeve 410, a sleeve connector 420, a spring contact 430 and an elastic compression member 440. The conductor sleeve 410 is a hollow tube made of conductive metal or conductive alloy, the front end of the tube is provided with a first annular protrusion 411 protruding inward, and the rear end of the tube is connected to the sleeve connector 420. Figure 1 , Figure 4 As shown, the end of the sleeve connector 420 is provided with a connecting portion 421, and the root portion is connected to the cable core of the coaxial cable, and is made of conductive metal or conductive alloy. The connecting portion 421 is a cylinder. The diameter of the connecting portion 421 is smaller than the diameter of the main body of the sleeve connector 420, and the diameter of the connecting portion 421 matches the inner diameter of the conductor sleeve 410, so that the connecting portion 421 at the end of the sleeve connector 420 can be inserted into the tail end of the conductor sleeve 410, and the sleeve connector 420 body is stuck outside the conductor sleeve 410, thereby realizing the connection between the sleeve connector 420 and the conductor sleeve 410.

[0025] The spring contact member 430 and the elastic compression member 440 are disposed in the tube body of the conductor sleeve 410 and are clamped between the connecting portion 421 at the end of the sleeve connector 420 and the first annular protrusion 411. Figure 1 , Figure 2 , Figure 3As shown, there is a first inner annular cone 412 between the inner side of the first annular protrusion 411 and the inner wall of the conductor sleeve 410 body. The angle between the first inner annular cone 412 and the axial direction is 40 to 55 degrees, preferably 45 degrees. The spring contact 430 is a hollow tube body composed of a contact root 432 and a contact claw 431, and is made of a conductive metal or a conductive alloy. The contact claw 431 is installed on the contact root 432, and its tube wall thickness is less than the tube wall thickness of the contact root 432, and the outer diameter is the same as that of the contact root 432. The contact claw 431 is provided with a plurality of grooves 433 along the axial direction, so that the contact claw 431 forms a spring claw structure composed of a plurality of annular claw petals. The number of the grooves 433 and the annular claw petals is 3 to 8, preferably 4. As shown Figure 5 As shown, the four slots 433 are arranged in a cross shape, dividing the tube body of the contact claw 431 into four annular claw petals of the same size. The outer diameter of the contact claw 431 matches the inner diameter of the conductor sleeve 410. Specifically, the outer diameter of the contact claw 431 is slightly smaller than the inner diameter of the conductor sleeve 410, so that the spring contact 430 can be installed in the conductor sleeve 410. The claw mouth of the spring claw structure of the contact claw 431 faces the front end. The elastic compression member 440 is arranged between the contact root 432 and the connecting portion 421 at the end of the sleeve connector 420, so that the elastic compression member 440 provides a forward axial thrust to the spring claw structure or the spring contact 430. A second annular protrusion 434 is provided on the inner side of the annular claw petal end of the spring claw structure of the contact claw 431, and an outer circular cone surface 435 is provided on the outer side. The inner diameter of the second annular protrusion 434 is the same as the inner diameter of the first annular protrusion 411. A second inner annular conical surface 436 is provided between the second annular protrusion 434 and the end surface. The outer annular conical surface 435 matches the first inner annular conical surface 412 , so that the outer annular conical surface 435 is closely attached to the first inner annular conical surface 412 under the push of the elastic compression member 440 .

[0026] The working principle of the seamless jack inner conductor of this embodiment is as follows: Figure 2 , Figure 3 As shown, the thrust of the elastic compression member 440 is indicated by arrow F. When the pin inner conductor is not inserted into the seamless jack inner conductor of this embodiment, the thrust of the elastic compression member 440 acts through the sliding action of the outer annular conical surface 435 at the end of the annular claw petal of the contact claw portion 431 and the inclined surface between the first inner annular conical surface 412, as shown in FIG. Figure 3 As shown, the end of the annular claw petal of the contact claw portion 431 is convex inward, refer to the comparison line L. When the inner conductor of the pin is inserted into the inner conductor of the seamless socket of this embodiment, the inner conductor of the pin is inserted into the claw mouth of the contact claw portion 431 under the guidance of the second inner circular cone surface 436, and the diameter of the inner conductor of the pin matches the inner diameter of the first annular protrusion 411. At this time, the end of the annular claw petal of the contact claw portion 431 is stretched open by the inner conductor of the pin, as shown in FIG. Figure 2As shown, the axial thrust of the elastic compression member 440 acts through the inclined surface between the outer annular conical surface 435 and the first inner annular conical surface 412, so that the second annular protrusion 434 at the end of the annular claw petal of the contact claw 431 tightly embraces the cylindrical surface of the inner conductor of the plug pin. On the other hand, due to the existence of the second annular protrusion 434, the contact portion between the inner conductor of the plug pin and the inner conductor of the plug hole is located between the second annular protrusion 434 and the cylindrical surface of the inner conductor of the plug pin, while the other parts of the inner conductor of the plug pin are suspended. Through the close contact between the outer annular conical surface 435 outside the second annular protrusion 434 and the first inner annular conical surface 412, the inner conductor of the plug pin is connected to the conductor sleeve 410. That is to say, in this embodiment, the contact portion between the inner conductor of the plug pin and the conductor sleeve 410 is located at the front end of the conductor sleeve 410.

[0027] It should be noted that, in the present embodiment, the elastic compression member 440 is an axial compression spring. Those skilled in the art will appreciate that the elastic compression member 440 may be replaced by other elastic components, such as a leaf spring, a bellows spring, elastic rubber, and the like.

[0028] In addition, in this embodiment, the sleeve connector 420 and the conductor sleeve 410 are connected by interference fit. Those skilled in the art will appreciate that the sleeve connector 420 and the conductor sleeve 410 may also be connected by welding or threaded connection.

[0029] Example 2

[0030] This embodiment is an application of the seamless jack inner conductor in embodiment 1 on a coaxial connector. The coaxial connector is a coaxial female connector, which is used for a coaxial male connector to achieve electrical connection, such as Figure 6 , Figure 7 shown. Figure 6The left side is the coaxial female connector 200 of the present embodiment, and the right side is the coaxial male connector 100 matching the coaxial female connector 200 of the present embodiment. The end of the coaxial female connector 200 is provided with a socket inner conductor 400 in the central axial direction. The socket inner conductor 400 is the seamless socket inner conductor in the aforementioned embodiment 1. The end of the coaxial male connector 100 is provided with a pin inner conductor 101 in the central axial direction. A connecting screw sleeve 300 is installed on the coaxial male connector 100. The connecting screw sleeve 300 is a regular hexagonal structure, and a circular sleeve hole 301 is provided therein. The connecting screw sleeve 300 is clamped on the coaxial male connector 100 through the screw sleeve clamp ring 102, so that a connecting insertion cavity is formed between the circular sleeve hole 301 of the connecting screw sleeve 300 and the end of the coaxial male connector 100, and the connecting screw sleeve 300 can rotate relative to the coaxial male connector 100 around the axis. The pin inner conductor 101 is located in the connecting insertion cavity. The connecting screw sleeve 300 is provided with an internal thread 302. The coaxial female connector 200 of this embodiment is provided with an external thread 202 matching the internal thread 302. The end of the coaxial female connector 200 of this embodiment can be inserted into the connection cavity of the coaxial male connector 100. When the end of the coaxial female connector 20 of this embodiment is inserted into the connection cavity of the coaxial male connector 100, the pin inner conductor 101 on the coaxial male connector 100 is inserted into the socket inner conductor 400, and the coaxial male connector 100 is fastened to the coaxial female connector 200 of this embodiment through the meshing action of the external thread 202 on the coaxial female connector 200 of this embodiment and the internal thread 302 of the connection screw sleeve 300.

[0031] Example 3

[0032] The seamless jack inner conductor in Example 1 can be applied to various coaxial connectors, not just to radio frequency coaxial connectors. Figure 8 The seamless jack inner conductor in the first embodiment is used in another coaxial connector. This coaxial connector is also called a converter. The converter, such as Figure 8 As shown, it includes a converter housing 847. Two connecting cavities 848 are respectively provided at both ends of the converter housing 847. The two connecting cavities 848 are respectively installed with the seamless socket inner conductor in Example 1. The two seamless socket inner conductors in the two connecting cavities 848 are oppositely arranged and share a sleeve connector 420. The two seamless socket inner conductors are connected by the shared sleeve connector 420. The sleeve connector 420 is installed in the converter housing 847 through the insulating fixing member 845. The roots of the conductor sleeves 410 of the two seamless socket inner conductors are isolated from the converter housing 847 by the insulating filler 846.

Claims

1. A seamless jack inner conductor, characterized in that: The invention comprises a conductor sleeve (410), a sleeve connector (420), a spring contact piece (430) and an elastic compression piece (440); the conductor sleeve (410) is a hollow tube body, the front end of the tube mouth is provided with a first annular protrusion (411) protruding inwardly, and the rear end of the tube mouth is connected to the sleeve connector (420); a first inner circular conical surface (412) is provided between the inner side of the first annular protrusion (411) and the inner wall of the conductor sleeve (410); the spring contact piece (430) and the elastic compression piece (440) are arranged on the tube body of the conductor sleeve (410). The spring contact (430) is composed of a contact root (432) and a contact claw (431); the contact claw (431) is installed on the contact root (432); the contact claw (431) is a hollow tube body with a plurality of grooves (433) opened along the axial direction, so that the contact claw (431) forms a spring claw structure composed of a plurality of annular claw petals; the outer diameter of the contact claw (431) matches the inner diameter of the conductor sleeve (410); the claw mouth of the spring claw structure faces the front end; the elastic compression member ( The spring claw structure is provided with a second annular protrusion (434) on the inner side of the annular claw petal end of the spring claw structure, and an outer annular conical surface (435) on the outer side; the outer annular conical surface (435) matches the first inner annular conical surface (412), so that the outer annular conical surface (435) is closely attached to the first inner annular conical surface (412); the pipe sleeve connecting piece (420) is provided with a second annular protrusion (434) on the inner side of the annular claw petal end of the spring claw structure, and an outer annular conical surface (435) is provided ...; the outer annular conical surface (435) is provided with an outer annular conical surface (435) on the outer side; the outer annular conical surface (435) matches the first inner annular conical surface (412), so that the outer annular conical surface (435) is closely attached to the first inner annular conical surface (41 0) is provided with a connecting portion (421); the connecting portion (421) is a cylinder with a diameter smaller than the body of the tube sleeve connector (420); the diameter of the connecting portion (421) matches the inner diameter of the conductor tube sleeve (410), so that the connecting portion (421) at the end of the tube sleeve connector (420) can be inserted into the tail end of the conductor tube sleeve (410) to achieve connection with the conductor tube sleeve (410); a second inner circular cone surface (436) is provided between the second annular protrusion (434) on the inner side of the end of the annular claw petal of the spring claw structure and the end surface.

2. The seamless jack inner conductor according to claim 1, characterized in that: The number of the slots (433) is 3 to 8.

3. The seamless jack inner conductor according to claim 1, characterized in that: The elastic compression member (440) is an axial spring.

4. The seamless jack inner conductor according to claim 1, characterized in that: The inner diameter of the first annular protrusion (411) is the same as the inner diameter of the second annular protrusion (434).

5. The seamless jack inner conductor according to claim 1, characterized in that: The included angle between the first inner circular conical surface (412) and the axial direction is 45 degrees.

6. A coaxial connector, which is a coaxial female connector, characterized in that: The end portion of the coaxial female connector is axially disposed with a seamless jack inner conductor as claimed in any one of claims 1 to 5.

7. A converter, comprising a converter housing (847); two connecting cavities (848) are respectively provided at two ends of the converter housing (847); characterized in that: The two connecting cavities (848) are each respectively installed with a seamless jack inner conductor as described in any one of claims 1 to 5; the two seamless jack inner conductors in the two connecting cavities (848) are arranged oppositely and share a pipe sleeve connector (420); the two seamless jack inner conductors are connected through the shared pipe sleeve connector (420); the pipe sleeve connector (420) is installed in the converter housing (847) through an insulating fixing (845).

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