An injection-molded radio frequency coaxial connector

Abstract

The invention discloses an injection-molded radio frequency coaxial connector, which belongs to the field of communication technology. The injection-molded radio frequency coaxial connector includes an inner conductor, a connecting screw sleeve, an outer shell, a fixing screw sleeve and a cable, wherein the inner conductor is provided with an anti-rotation slot and a notch slot, the outer shell is provided with an injection molding port, an injection molding cavity and a limiting barb, and both ends of the fixing screw sleeve are provided with an inner tapered hole and a fixing sleeve. Compared with the existing structure, the anti-rotation slot designed in the invention has an anti-rotation function for the inner conductor, and the notch slot at the tail of the inner conductor can ensure that the cable core wire is conveniently welded. In addition, by injection molding the outer shell and the fixing screw sleeve, the tensile strength and anti-rotation capabilities of the connector structure are significantly improved, and the phenomenon of the inner conductor of the connector moving and the cable breaking when the cable is bent is effectively avoided. The invention can be used in occasions with small space, and has the characteristics of small size, light weight, stable electrical connection, good reliability and the like.

Description

Technical Field

[0001] The invention belongs to the field of communication technology, and in particular relates to an injection-molded radio frequency coaxial connector. Background Art

[0002] RF coaxial cable is a cable that transmits cable energy within the RF range. RF coaxial cable refers to a cable whose inner conductor, outer conductor and insulator of the RF cable share the same axis. RF coaxial cable consists of a center conductor, an insulator, an outer conductor and a sheath. According to the degree of softness, RF coaxial cable can be divided into three types: semi-rigid, semi-flexible and soft cables. Among them, soft cables commonly used include high-performance cables, temperature-stable cables, radiation-resistant cables, low-loss cables, spiral, corrugated copper tube power-resistant low-loss cables, and ordinary high-temperature resistant cables. RF coaxial cables are widely used in wireless communications, broadcasting, television, radar, navigation, computers and instruments, and are indispensable components in various radio communication systems and electronic equipment.

[0003] At present, the technical solution adopted by the RF coaxial connector for connecting thin cables is: the cable core wire and the inner conductor are connected by welding, the outer conductor is deformed by crimping with a wire clamp to fix the cable shielding layer to the rear of the shell, and the heat shrink tube is used to heat shrink and tighten it at the rear of the connector. The above existing structure has the following technical problems: 1) The thinner cables are generally used in occasions with smaller spaces, and the existing connectors are large in appearance and volume; 2) The inner conductor in the existing structure has poor anti-rotation ability, especially the connector is a threaded connection. Since the cable core wire is thin, it is easy to break the core wire; 3) The cable is fixed by crimping with a wire clamp at the rear of the connector. Affected by the consistency of the connector and cable size, the crimping reliability is poor. Although it can be fixed secondary by welding at the wire clamp, it is easy to cause the rear of the connector to become hard. When the cable is bent and installed, the force on the tail is easy to cause the cable to break. Summary of the invention

[0004] In view of the above technical problems, the present invention provides an injection-molded RF coaxial connector, which can improve the tensile strength, bending resistance and rotation resistance of the connection part, and effectively avoid the movement of the conductor inside the connector and the breakage of the cable when the cable is bent.

[0005] The present invention solves the above problems by the following technical means:

[0006] An injection-molded radio frequency coaxial connector, characterized in that it includes an inner conductor, a connecting screw sleeve, an outer shell, a fixing screw sleeve and a cable, wherein: an installation cavity is opened in the middle of the outer shell, and an insulator for installing the inner conductor is arranged inside the installation cavity; the outer shell is installed between the connecting screw sleeve and the fixing screw sleeve, an injection molding port is arranged on the side wall of the outer shell, and an injection molding cavity is formed between the inner wall of the outer shell and the inner wall of the fixing screw sleeve; an inner tapered hole is arranged at one end of the fixing screw sleeve close to the outer shell, and a fixing sleeve for installing the cable is arranged at one end of the fixing screw sleeve away from the outer shell.

[0007] Preferably, the inner conductor is provided with a barb structure, and a plurality of anti-rotation grooves are symmetrically provided on the barb structure.

[0008] Preferably, a notch groove is provided at the tail position of the inner conductor, and the notch groove is used for welding the cable.

[0009] Preferably, the insulator is provided with a stepped hole for installing the inner conductor.

[0010] Preferably, a limiting barb for limiting the movement of the insulator is provided on the inner wall of the shell.

[0011] Preferably, a sealing ring and a clamping ring are provided between the connecting screw sleeve and the outer shell.

[0012] Preferably, the core wire of the cable is installed in the notch groove at the tail of the inner conductor, the insulation layer of the cable is arranged in the injection molding cavity of the shell, and the shielding layer and sheath of the cable are installed in the fixing sleeve of the fixing screw sleeve.

[0013] Preferably, the outer shell, the fixing screw sleeve and the joint between the cable and the connector are injection molded to form an injection molded body, which consists of an inner injection molded body and an outer injection molded body. The inner injection molded body fills the injection molding cavity, and the outer injection molded body wraps the outer shell, the fixing screw sleeve and the joint between the cable.

[0014] The injection-molded radio frequency coaxial connector of the present invention has the following beneficial effects:

[0015] 1) The inner conductor of the connector of the present invention is designed with a barb structure and an anti-rotation slot, and the anti-rotation slot and the insulator interact to achieve an anti-rotation function;

[0016] 2) In the present invention, a notch groove is provided at the tail of the inner conductor, and the notch groove can ensure welding between the cable core wire and the inner conductor of the connector;

[0017] 3) In the present invention, the inner wall of the housing is designed with limit barbs, which can prevent the insulator from falling off;

[0018] 4) The shell of the present invention is designed with a notch, and the inner cavity injection molding can be performed through the notch;

[0019] 5) In the present invention, the rear end of the connector uses a fixing screw sleeve to fix the cable through crimping and deformation;

[0020] 6) In the present invention, the inner and outer cavities are injection molded into one piece, which strengthens the connection, improves the tensile and anti-rotation capabilities of the connector structure, and effectively avoids the movement of the conductor inside the connector and the breakage of the cable when the cable is bent. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the implementation mode will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a schematic diagram of the structure of the present invention before injection molding;

[0023] Figure 2 It is a schematic diagram of the structure of the present invention after injection molding;

[0024] Figure 3 It is a schematic diagram of the structure of the inner conductor of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the anti-rotation groove of the present invention;

[0026] Figure 5 It is a structural schematic diagram of the insulator of the present invention;

[0027] Figure 6 It is a structural schematic diagram of the injection molding cavity of the present invention;

[0028] Figure 7 It is a schematic diagram of the structure of the limiting barb of the present invention;

[0029] Figure 8 It is a structural schematic diagram of the fixing screw sleeve of the present invention;

[0030] Fig. 9 It is a schematic diagram of the installation of the cable of the present invention.

[0031] Among them, 1-inner conductor, 101-barb structure, 102-anti-rotation slot, 103-notch slot, 2-connecting screw sleeve, 201-installation cavity, 202-insulator, 203-sealing ring, 204-clamp ring, 3-housing, 301-injection molding port, 302-injection molding cavity, 303-limiting barb, 4-fixing screw sleeve, 401-inner cone hole, 402-fixing sleeve, 5-cable, 501-core wire, 502-insulating layer, 503-shielding layer, 504-sheath, 6-injection molding body, 601-inner injection molding body, 602-outer injection molding body. DETAILED DESCRIPTION

[0032] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0033] The present invention will be described in detail below with reference to the accompanying drawings.

[0034] like Figure 1 As shown, the injection-molded RF coaxial connector includes an inner conductor 1, a connecting screw sleeve 2, an outer shell 3, a fixed screw sleeve 4 and a cable 5. The outer shell 3 is installed between the connecting screw sleeve 2 and the fixed screw sleeve 4. Specifically, one end of the outer shell 3 is connected to the connecting screw sleeve 2 through a clamping ring 204 and a sealing ring 203, and the other end of the outer shell 3 is connected to the fixed screw sleeve 4 through a thread. Among them, an installation cavity 201 is provided in the middle of the outer shell 3, and an insulator 202 is provided inside the installation cavity 201. The insulator 202 is provided with a step hole for installing the inner conductor 1. An injection molding port 301 is provided on the side wall of the outer shell 3. An injection molding cavity 302 is formed between the inner wall of the outer shell 3 and the inner wall of the fixed screw sleeve 4. During the actual injection molding process, the inner and outer cavities are injection-molded into one, which can not only strengthen the connection, but also improve the tensile and anti-rotation capabilities of the connector structure, and effectively avoid the phenomenon of the inner conductor of the connector moving and the cable breaking when the cable is bent. Figure 2 As shown, the injection molded body 6 is composed of an inner injection molded body 601 and an outer injection molded body 602 . The inner injection molded body 601 fills the injection molding cavity 302 , and the outer injection molded body 602 wraps around the joint of the housing 3 , the fixing screw sleeve 4 and the cable 5 .

[0035] It should be noted that Figure 3 and Figure 4 The conductor 1 is provided with a barb structure 101, and a plurality of anti-rotation slots 102 are symmetrically provided on the barb structure 101. In this embodiment, four anti-rotation slots 102 are symmetrically provided. The interaction of the barb structure 101, the anti-rotation slots 102 and the insulator 202 can play an anti-rotation function. Figure 5As shown, the insulator 202 is provided with a stepped hole, which can completely wrap the inner conductor 1 to play the role of insulation and fixation. A notch groove 103 is provided at the tail position of the inner conductor 1, and the notch groove 103 is used for welding the cable 5. The notch groove can ensure that the cable core wire and the inner conductor of the connector are welded.

[0036] like Figure 6 As shown, the injection port 301 is arranged at the top of the inner wall of the housing 3, and is connected to the injection cavity 302. During the actual injection molding process, the inner and outer cavities are molded into one piece, which can not only strengthen the connection, but also improve the tensile and anti-rotation capabilities of the connector structure, and effectively avoid the conductor movement and cable breakage in the connector when the cable is bent.

[0037] like Figure 7 As shown, a limiting barb 303 for limiting the movement of the insulator 202 is provided on the inner wall of the housing 3, thereby further ensuring the connection reliability.

[0038] like Figure 8 As shown, an inner conical hole 401 is provided at one end of the fixing screw sleeve 4 close to the outer shell 3, and a fixing sleeve 402 for installing the cable 5 is provided at one end of the fixing screw sleeve 4 away from the outer shell 3, wherein the design of the inner conical hole 401 can ensure good fluidity of the injection molding material during injection molding.

[0039] like Fig. 9 As shown, the cable 5 needs to be stripped and pre-processed before being installed in the connector. Specifically, the core wire 501 of the cable 5 is installed in the notch groove 103 at the tail of the inner conductor 1, the insulating layer of the cable 5 is arranged in the injection molding cavity 302 of the shell 3, and the shielding layer 503 and the sheath 504 of the cable 5 are installed in the fixed sleeve 402 of the fixed screw sleeve 4. Specifically, the cable sheath 504 is in the middle of the shielding layer 503, and the shielding layer 503 is turned down, which is equivalent to two layers of shielding layers. The notch groove at the tail of the inner conductor can ensure that the cable core wire is convenient for welding. In addition, by injection molding the shell and the fixed screw sleeve, the tensile and anti-rotation capabilities of the connector structure are significantly improved, and the inner conductor of the connector moves and the cable breaks when the cable is bent. The present invention can be used in small spaces and has the characteristics of small size, light weight, stable electrical connection, good reliability, etc.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An injection-molded radio frequency coaxial connector, characterized in that: It comprises an inner conductor (1), a connecting screw sleeve (2), an outer shell (3), a fixing screw sleeve (4) and a cable (5), wherein: A mounting cavity (201) is provided in the middle of the housing (3), and an insulator (202) for mounting an inner conductor (1) is arranged inside the mounting cavity (201); The outer shell (3) is installed between the connecting screw sleeve (2) and the fixing screw sleeve (4); an injection port (301) is provided on the side wall of the outer shell (3); and an injection cavity (302) is formed between the inner wall of the outer shell (3) and the inner wall of the fixing screw sleeve (4); An inner conical hole (401) is provided at one end of the fixing screw sleeve (4) close to the outer shell (3), and a fixing sleeve (402) for installing the cable (5) is provided at one end of the fixing screw sleeve (4) away from the outer shell (3); The inner conductor (1) is provided with a barb structure (101), and the barb structure (101) is symmetrically provided with a plurality of anti-rotation slots (102); A notch groove (103) is provided at the tail portion of the inner conductor (1), and the notch groove (103) is used for welding the cable (5); The insulator (202) is provided with a stepped hole for installing the inner conductor (1); The inner wall of the housing (3) is provided with a limiting barb (303) for limiting the movement of the insulator (202); A sealing ring (203) and a clamping ring (204) are provided between the connecting screw sleeve (2) and the outer shell (3).

2. The injection-molded RF coaxial connector according to claim 1, characterized in that: The core wire (501) of the cable (5) is installed in the notch groove (103) at the tail of the inner conductor (1), the insulation layer of the cable (5) is arranged in the injection molding cavity (302) of the outer shell (3), and the shielding layer (503) and the sheath (504) of the cable (5) are installed in the fixing sleeve (402) of the fixing screw sleeve (4).

3. The injection-molded RF coaxial connector according to claim 1, characterized in that: The outer shell (3), the fixing screw sleeve (4), and the joint between the cable (5) and the connector are injection molded to form an injection molded body (6), wherein the injection molded body (6) is composed of an inner injection molded body (601) and an outer injection molded body (602), wherein the inner injection molded body (601) fills the injection molding cavity (302), and the outer injection molded body (602) wraps around the joint between the outer shell (3), the fixing screw sleeve (4), and the cable (5).

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