CN111355047A

CN111355047A - Pre-assembled wiring terminal

Info

Publication number: CN111355047A
Application number: CN202010291782.4A
Authority: CN
Inventors: 赵克恒; 刘苑辉; 杨仲凯
Original assignee: Comba Telecom Technology Guangzhou Ltd
Current assignee: Comba Telecom Technology Guangzhou Ltd
Priority date: 2020-04-14
Filing date: 2020-04-14
Publication date: 2020-06-30

Abstract

The invention provides a preassembled type wiring terminal which comprises a clamping seat, a shielding piece and a welding cup, wherein the clamping seat comprises an accommodating cavity with an opening and two clamping clips which are respectively arranged at two opposite ends of the accommodating cavity and are used for clamping a coaxial cable, the shielding piece and the welding cup are sequentially embedded in the accommodating cavity through the opening, a fixing hole for penetrating the coaxial cable is formed in the position, corresponding to the clamping clips, of the side wall of the shielding piece, the welding cup comprises a welding cavity for welding a lead of the coaxial cable, and the welding cavity is provided with a welding port corresponding to the opening. In the preassembled type wiring terminal provided by the invention, the welding opening corresponding to the accommodating cavity of the welding cavity is provided with the welding opening, two coaxial cables to be connected can be firstly penetrated into the card holder and the shielding piece and then are welded in the welding cavity, the preassembly of the card holder is realized, the phenomena of strain, bending and the like of a welding structure caused when the card holder is sleeved in can be avoided, and the stability of the intermodulation index of the antenna can be ensured.

Description

Pre-assembled wiring terminal

Technical Field

The invention relates to the technical field of electrical connection, in particular to a preassembled type wiring terminal.

Background

In recent years, with the development of base station antennas, the requirements for the quality of antennas are increasing, and the influence on the antenna indexes needs to be considered as much as possible in the antenna design and assembly processes.

Generally, electrical connection of a plurality of coaxial cables is involved in the antenna, but in the conventional terminal for connecting two coaxial cables, due to the limitation of the connection structure of a shielding piece, a welding cup and a fixing clamping seat, when in wiring, the coaxial cables need to penetrate through the shielding piece and then be welded and fixed in the welding cup, and then the fixing clamping seat is sleeved on an outer layer, so that the phenomena of pulling, bending and the like of the welding structure are easily caused in the process of sleeving and fixing the clamping seat, and the intermodulation index of the antenna is influenced.

Disclosure of Invention

The invention aims to provide a preassembled connecting terminal which can ensure stable connection structure.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a prepackage type binding post, includes cassette, shield and welding cup, the cassette is including having the open-ended and accept the chamber and divide and locate accept two clamping that the chamber is relative both ends and be used for centre gripping coaxial cable, the shield with the welding cup passes through the opening inlays in proper order and locates accept the intracavity, the lateral wall of shield corresponds the position department of clamping offers the fixed orifices that is used for wearing to establish coaxial cable, the welding cup is including being used for the confession coaxial cable's wire welded welding chamber, the welding chamber corresponds the opening is equipped with the welding mouth.

Preferably, the connecting lines of the clamping central points of the two clamping clips to the corresponding fixing holes on the shielding piece are arranged in a non-collinear mode.

Preferably, the side wall of the welding cup is provided with a welding hole penetrating through the welding cavity at a position corresponding to the fixing hole.

Preferably, the preassembled wiring terminal further comprises an isolation cup arranged between the shielding member and the welding cup, and the isolation cup is made of a high-temperature resistant material.

Preferably, the isolation cup is provided with an isolation cavity for sleeving the welding cup and a limit groove communicated with the isolation cavity, and the outer wall of the welding cup is provided with a limit block capable of being in clamping fit with the limit groove.

Preferably, the side wall of the isolation cup is provided with a fixing groove for placing the coaxial cable at a position corresponding to the fixing hole.

Preferably, the inner wall of accepting the chamber is equipped with the buckle, the shield passes through the buckle is relative it is fixed to accept the chamber joint.

Preferably, the outer wall of the clamp is provided with a reinforcing rib extending to the accommodating cavity.

Preferably, the shield is provided with a groove for adding a fixing material at the position of the fixing hole, so that the coaxial cable is fixed at the fixing hole through the fixing material.

Further, the clamping seat is made of high-temperature-resistant materials.

Compared with the prior art, the scheme of the invention has the following advantages:

1. in the preassembled type wiring terminal provided by the invention, the welding opening corresponding to the accommodating cavity of the welding cavity is provided with the welding opening, two coaxial cables to be connected can penetrate into the clamping seat and the shielding piece firstly and then are welded in the welding cavity, so that the electrical connection is realized, the clamping seat is assembled in advance, the welding structure can be protected through the clamping seat, the phenomena of pulling, bending and the like of the welding structure when the clamping seat is sleeved in are avoided, and the stability of the intermodulation index of the antenna is ensured.

2. In the preassembled wiring terminal provided by the invention, the fixing axes of the two clamps are arranged in a staggered manner, namely, the two coaxial cables penetrating through the two clamps are arranged in a non-coaxial manner, and the clamping seat is more difficult to bend through the two coaxial cables arranged side by side, so that the strength of the clamping seat is further improved. Secondly, compare the structure of coaxial setting, can not influence the welding because being close to too of two just right coaxial cable to promote the welding space in the welding cup, reduce the welding degree of difficulty, promote welding strength.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a reference diagram illustrating a use state of a preassembled wiring terminal according to an embodiment of the present invention;

fig. 2 is a top view of the preassembled terminal shown in fig. 1;

FIG. 3 is a perspective view of the cartridge shown in FIG. 1;

FIG. 4 is a perspective view of an alternate angle of the cartridge shown in FIG. 3;

fig. 5 is a schematic view of an assembly structure of the card socket and the shielding member shown in fig. 1;

FIG. 6 is a schematic view of an assembled structure of the isolation cup and the weld cup shown in FIG. 1;

fig. 7 is a schematic structural view of a coaxial cable according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.

It will be understood by those within the art that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

Fig. 1 to 6 collectively show a preassembled terminal provided in an embodiment of the present invention, which is used for connecting two coaxial cables (shown in fig. 7) inside a base station antenna, and when the two coaxial cables are electrically connected, the strength and stability of a coaxial cable connection structure can be ensured, and the phenomena of pulling, bending, and the like of the coaxial cable connection structure are avoided, so as to ensure good intermodulation index of the antenna.

Referring to fig. 1 and 2, the preassembled wiring terminal 1 includes a card holder 11, a shielding member 12, an isolation cup 13 and a welding cup 14, and the shielding member 12, the isolation cup 13 and the welding cup 14 are sequentially embedded in the card holder 11. The coaxial cable 2 to be connected can be fixed by welding in the welding cup 14 after passing through the clamping seat 11, the shielding piece 12 and the isolation cup 13, and can be electrically connected with another coaxial cable 2 fixed by welding in the welding cup 14.

As shown in fig. 3, the card socket 11 includes a receiving cavity 111 and two clips 112 respectively disposed at two opposite ends of the receiving cavity 111 for clamping the coaxial cable 2, the receiving cavity 111 has an opening 1111 in a direction perpendicular to a connection line direction of the two clips 112, and the shielding member 12, the separating cup 13 and the soldering cup 14 can be sequentially inserted into the receiving cavity 111 through the opening 1111.

Referring to fig. 6, the soldering cup 14 includes a soldering cavity 141 for soldering the coaxial cables 2, the soldering cavity 141 is provided with a soldering port 1411 corresponding to the opening 1111, two coaxial cables 2 to be connected can pass through the card holder 11, the shielding member 12 and the isolation cup 13 first and then be soldered in the soldering cavity 14, so as to achieve electrical connection, since the card holder 11 is assembled in advance, the soldering structure can be protected by the card holder 11, and the phenomena of pulling, bending and the like of the soldering structure caused when the card holder 11 is inserted are avoided, thereby ensuring the stability of the intermodulation index of the antenna.

Furthermore, an avoiding hole 1112 for the coaxial cable 2 to penetrate into the accommodating cavity 111 is further formed in a position of the side wall of the accommodating cavity 111 corresponding to the clip 112.

Preferably, the clip 112 is designed to be an unclosed and elastic annular structure, so as to better clamp and fix the coaxial cable 2, and facilitate the later period of detachment and removal of the coaxial cable 2, thereby improving the convenience of maintenance.

As shown in fig. 4, the clip 112 is provided with a rib 1121, the rib 1121 extends from the outer wall of the clip 112 to the outer wall of the accommodating cavity 111, the rib 1121 can improve the connection strength and rigidity of the clip 112 with respect to the accommodating cavity 111, and prevent the clip 112 from bending with respect to the accommodating cavity 111, thereby preventing the connection structure of the coaxial cable 2 from bending, and ensuring the strength and stability of the connection structure of the coaxial cable 2.

Referring to fig. 3 and 5, a buckle 1113 is disposed on an inner wall of the accommodating cavity 111, the shielding element 12 includes a slot 121 that can be fastened with the buckle 1113, and the shielding element 12 can be fastened and fixed with respect to the accommodating cavity 111 by fastening and connecting the slot 121 and the buckle 1113, so that the connection structure is simple and the assembly and disassembly are convenient.

In fig. 5, a fixing hole 122 for passing the coaxial cable 2 is further opened at a position of the side wall of the shield 12 corresponding to the clip 112, and an aperture of the fixing hole 122 is set according to a diameter of the coaxial cable 2.

Referring to fig. 2, connecting lines from the clamping center points of the two clips 112 to the corresponding fixing holes 122 on the shielding member 12 are not arranged in a collinear manner, that is, the fixing axes of the two clips 112 are arranged in a staggered manner, the two coaxial cables 2 penetrating through the two clips 112 are arranged in a non-coaxial manner, and the two coaxial cables 2 arranged side by side make the clamping base 11 more difficult to bend, so as to further improve the strength of the clamping base 11. Secondly, compare the structure of coaxial setting, can not influence the welding because too close to of two just right coaxial cable 2 to promote welding space in the welding cup 14 reduces the welding degree of difficulty, promotes welding strength.

Preferably, the shield 12 is provided with a groove (not shown, the same applies below) for adding a fixing material at the position of the fixing hole 122, the fixing material may be solder or a fixing glue with a certain strength, and the coaxial cable 2 is fixed on the shield 12 by adding the fixing material in the groove, so that the coaxial cable 2 can be fixed in a strengthened manner, and the coaxial cable 2 is prevented from being loosened during the welding process.

As shown in fig. 6, the isolation cup 13 includes an isolation cavity 131 for housing the welding cavity 141 and two limiting grooves 132 communicated with the isolation cavity 131, and the two limiting grooves 132 are respectively disposed at two opposite ends of the isolation cavity 131. The outer wall of the welding cup 14 is provided with a limiting block 142 matched with the limiting groove 132 in a clamping and embedding manner, the welding cavity 141 of the welding cup 14 is embedded in the isolation cavity 131, and the limiting block 142 is matched with the limiting groove 132 in a clamping and embedding manner to realize limiting, so that the phenomenon that the welding process is loosened in the isolation cup 13 due to insufficient preparation precision of the welding cup 14 is effectively avoided, and the poor welding condition is avoided.

Furthermore, a fixing groove 133 for placing the coaxial cable 2 is formed in a position of the sidewall of the isolation cup 13 corresponding to the fixing hole 122, a welding hole 143 penetrating through the welding cavity 141 is formed in a position of the sidewall of the welding cup 14 corresponding to the fixing hole 122, and the welding hole 143 is used for penetrating and fixing the coaxial cable 2.

Referring to fig. 7, the coaxial cable 2 according to the present embodiment sequentially includes a dielectric layer 21, a heat insulating layer 23 and a conductive wire 23 from outside to inside, wherein diameters of the clip 112 and the fixing hole 122 are set according to an outer diameter of the dielectric layer 21, widths and depths of the fixing groove 133 are set according to an outer diameter of the heat insulating layer 23, and a diameter of the welding hole 143 is set according to an outer diameter of the conductive wire 23, so as to ensure a fixing effect and improve a connection strength.

Specifically, before welding, the dielectric layer 21, the heat insulating layer 23 and the lead 23 are sequentially peeled off to expose a preset length, then the dielectric layer 21 is sequentially inserted into the clamp 112 and the fixing hole 122 to realize axial limiting, the heat insulating layer 23 is abutted against the fixing groove 133 to realize shoulder limiting, so that the welding process of the coaxial cable 2 is kept stable, and the isolation cup 13 and the welding cup 14 can be abutted against the accommodating cavity 111 through the coaxial cable 2. At this time, the wires 23 are inserted into the soldering cavity 141 through the soldering holes 143, and solder is injected into the soldering cavity 141 through the soldering ports 1411, so that physical and electrical connections between the wires 23 of the two coaxial cables 2 can be completed.

In this embodiment, the clamping seat 11 is made of a high-temperature-resistant material, so as to ensure the strength and stability of the clamping seat itself in a high-temperature environment, and thus, the clamping seat can better strengthen and fix other accessories and related connecting structures. The shielding element 12 is made of a metal material, for example, Cu8Sn8 is plated on the surface of ZZnA14CuMg, so as to have a good electromagnetic isolation effect, and achieve an electromagnetic protection effect on the connection structure of the coaxial cable 2. The isolation cup 13 is made of heat-insulating material, for example, PDFE plastic, and the heat generated by the welding cup 14 during welding is not dissipated to damage other parts by the wrapping of the isolation cup 13. The welding cup 14 is made of die-casting zinc alloy, has good fluidity and corrosion resistance, is easy to weld, braze and perform plastic processing, and is convenient for welding the coaxial cable 2.

It should be understood that, in the present embodiment, the coaxial cable 2 of the base station antenna is taken as an example to illustrate a specific structure of the pre-installed terminal 1, but the pre-installed terminal 1 is not limited to a specific application, and the pre-installed terminal 1 may also be applied to other cables having a structure similar to the coaxial cable 2 of the base station antenna, so as to achieve electrical connection between the two cables and protect the connection structure thereof.

The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a prepackage type binding post, its characterized in that, includes cassette, shield and welding cup, the cassette is including having the open-ended and acceping the chamber and locating separately accept the relative both ends in chamber and be used for two clamping of centre gripping coaxial cable, the shield with the welding cup passes through the opening inlays in proper order and locates accept the intracavity, the lateral wall of shield corresponds the fixed orifices that is used for wearing to establish coaxial cable is offered to the position department of clamping, the welding cup is including being used for supplying coaxial cable's wire welded welding chamber, the welding chamber corresponds the opening is equipped with the welding mouth.

2. The preassembled terminal of claim 1 wherein the connection lines of the clamping center points of the two clamps to the corresponding fixing holes of the shield are arranged non-collinearly.

3. The preassembled connecting terminal of claim 2 wherein the side wall of the welding cup is provided with a welding hole penetrating through the welding cavity at a position corresponding to the fixing hole.

4. The preassembled terminal of claim 1 further comprising a spacer cup disposed between the shield and the solder cup, the spacer cup being made of a high temperature resistant material.

5. The preassembled connecting terminal of claim 4, wherein the isolating cup is provided with an isolating cavity for sleeving the welding cup and a limiting groove communicated with the isolating cavity, and the outer wall of the welding cup is provided with a limiting block which can be in embedded fit with the limiting groove.

6. The preassembled connecting terminal of claim 5 wherein the side wall of the isolation cup is provided with a fixing groove corresponding to the fixing hole for placing the coaxial cable.

7. The preassembled terminal of claim 1 wherein the inner wall of the receiving cavity is provided with a snap, and the shield is fixed to the receiving cavity by the snap.

8. The preassembled terminal of claim 1 wherein the outer wall of the clip is provided with a reinforcement rib extending into the receiving cavity.

9. The preassembled connecting terminal of claim 1 wherein the shield member is provided with a groove for adding a fixing material at the position of the fixing hole, so that the coaxial cable is fixed at the fixing hole through the fixing material.

10. The preassembled terminal of claim 1 wherein the socket is made of a high temperature resistant material.