Welding fixing device for coaxial cable of antenna phase shifter

Abstract

The utility model discloses a welding and fixing device for a coaxial cable of an antenna phase shifter, which comprises an aluminum profile cavity, a PCB (printed circuit board), an elastic fixing clamp and a coaxial cable, the PCB is embedded in the aluminum profile cavity, the elastic fixing clamp is clamped on the aluminum profile cavity, the coaxial cable is connected with the PCB through the elastic fixing clamp, and the coaxial cable is connected with the PCB through the elastic fixing clamp. And the aluminum profile cavity, the elastic fixing clamp and the coaxial cable are conducted. According to the utility model, the aluminum profile cavity is conducted with the characteristic boss on the elastic fixing clamp, the elastic fixing clamp is conducted with the outer conductor of the coaxial cable, and the wire core of the coaxial cable is conducted with the PCB, so that the aluminum profile cavity, the elastic fixing clamp and the coaxial cable are conducted; the elastic fixing clamp is clamped on the aluminum profile cavity through internal stress generated by elastic deformation, unnecessary metal contact is avoided through the U-shaped insulation pad, and therefore the fixing mode of the antenna phase shifter and the coaxial cable avoids the use of screw hitting and electroplating modes, the installation efficiency is effectively improved, and the production cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of base station antennas, and in particular relates to a welding and fixing device for a coaxial cable of an antenna phase shifter. Background Art

[0002] Cavity phase shifters are widely used in many electrically tunable antennas. In the antenna system, the vibrator is connected to the cavity phase shifter through a coaxial cable, where the outer conductor of the coaxial cable needs to be well connected to the aluminum alloy cavity of the cavity phase shifter. Since aluminum alloy itself is not easy to tin, it cannot be directly welded to the outer conductor of the coaxial cable. The existing practices are: 1. Electroplating tin on the entire aluminum alloy cavity or spraying copper locally; 2. Using screws to fix a tinned copper sheet to the aluminum alloy cavity, and then welding it to the coaxial cable; 3. Using screws and metal clamps to fix the coaxial cable to the aluminum alloy cavity. The above three methods all have disadvantages: complex process and high cost. Utility Model Content

[0003] In order to solve the technical problems existing in the prior art, the purpose of the utility model is to provide a welding and fixing device for a coaxial cable of an antenna phase shifter.

[0004] In order to achieve the above purpose and the above technical effect, the technical solution adopted by the utility model is:

[0005] A welding and fixing device for a coaxial cable of an antenna phase shifter comprises an aluminum profile cavity, a plurality of PCB circuit boards, a plurality of elastic fixing clips and a plurality of coaxial cables, wherein the PCB circuit boards are embedded in the aluminum profile cavity, the elastic fixing clips are clamped on the aluminum profile cavity by the internal stress generated by their own elastic deformation, the coaxial cables are connected to the PCB circuit boards via the elastic fixing clips, and the aluminum profile cavity, the elastic fixing clips and the coaxial cables are conductively connected.

[0006] Furthermore, the aluminum profile cavity is electrically connected to a characteristic boss on the elastic fixing clip, the elastic fixing clip is electrically connected to an outer conductor of the coaxial cable, and the core of the coaxial cable is electrically connected to a PCB circuit board.

[0007] Furthermore, the coaxial cable includes a wire core, an insulating medium, an outer conductor and an outer sheath which are coaxially arranged in sequence from the inside to the outside, one end of the PCB circuit board extends into the aluminum profile cavity, the other end of the PCB circuit board is welded together with the wire core and is conductive, the outer conductor is welded to the elastic fixing clip, and the outer conductor is conductively connected to the elastic fixing clip.

[0008] Furthermore, long grooves matching the elastic fixing clip are respectively provided on the upper and lower surfaces of the aluminum profile cavity and at positions matching the elastic fixing clip, respectively, for limiting the degree of freedom of the elastic fixing clip.

[0009] Furthermore, the elastic fixing clip is provided with a plurality of through holes, and the opening edge of the elastic fixing clip is provided with a plurality of characteristic bosses, and the characteristic bosses are in contact with and conduct with the aluminum profile cavity.

[0010] Furthermore, the open end of the elastic fixing clip is covered with a U-shaped insulating pad, and only the characteristic boss on the elastic fixing clip is exposed.

[0011] Furthermore, the aluminum profile cavity is provided with a plurality of side through holes, one through hole is matched with one side through hole and the positions correspond one to one, the core of the coaxial cable passes through the through hole on the elastic fixing clip and the side through hole on the aluminum profile cavity, is inserted into the aluminum profile cavity and is welded to the PCB circuit board, and the insulating medium of the coaxial cable protects the core from contacting other metals when passing through the through hole on the elastic fixing clip and the side through hole on the aluminum profile cavity.

[0012] Furthermore, the elastic fixing clip is made of tinnable metal or metal plated with a tinnable coating.

[0013] Furthermore, the tinnable metal is a copper alloy or a zinc alloy, and the metal-plated tinnable coating is tin-plated steel or nickel-plated steel.

[0014] Furthermore, the U-shaped insulating pad has a U-shaped cross section, which is compatible with the elastic fixing clip.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model discloses a welding and fixing device for a coaxial cable of an antenna phase shifter, comprising an aluminum profile cavity, a plurality of PCB circuit boards, a plurality of elastic fixing clips and a plurality of coaxial cables. The PCB circuit board is embedded in the aluminum profile cavity, the PCB circuit board is welded with the wire core of the coaxial cable, the outer conductor of the coaxial cable is welded on the elastic fixing clip, the aluminum profile cavity is connected with a characteristic boss on the elastic fixing clip, the elastic fixing clip is connected with the outer conductor of the coaxial cable, and the wire core of the coaxial cable is connected with the PCB circuit board, so as to realize the connection between the aluminum profile cavity, the elastic fixing clip and the coaxial cable. The elastic fixing clip utilizes the internal stress generated by the elastic deformation of the metal material to generate a pre-tightening force, so that the elastic fixing clip can be effectively clamped on the aluminum profile cavity and reliable metal contact can be realized at the same time. A U-shaped insulating pad is sleeved on the elastic fixing clip, and the U-shaped insulating pad is utilized to avoid unnecessary metal contact, thereby avoiding the use of screws and electroplating in the fixing method of the antenna phase shifter and the coaxial cable, effectively improving the installation efficiency, reducing the production cost, and being suitable for industrial promotion and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 For this utility model Figure 1 A local enlarged view of point A;

[0019] Figure 3 For this utility model Figure 1 DD cross-sectional view;

[0020] Figure 4 It is a structural schematic diagram of the aluminum profile cavity of the utility model;

[0021] Figure 5 It is a structural schematic diagram of the coaxial cable of the utility model;

[0022] Figure 6 It is a structural schematic diagram of the elastic fixing clip and the U-shaped insulating pad of the utility model;

[0023] Figure 7 It is a schematic structural diagram of the elastic fixing clip of the utility model. DETAILED DESCRIPTION

[0024] The present invention is described in detail below so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0025] A brief summary of one or more aspects is given below to provide a basic understanding of these aspects. This summary is not an exhaustive overview of all conceived aspects, and is neither intended to identify the key or critical elements of all aspects nor to define the scope of any or all aspects. Its only purpose is to give some concepts of one or more aspects in a simplified form as a prelude to a more detailed description that will be given later.

[0026] like Figure 1-7As shown, a welding and fixing device for a coaxial cable of an antenna phase shifter comprises an aluminum profile cavity 1, a plurality of PCB circuit boards 2, a plurality of elastic fixing clips 3, a plurality of U-shaped insulating pads 4 and a plurality of coaxial cables 5, wherein the PCB circuit board 2 is embedded in the aluminum profile cavity 1, the coaxial cable 5 comprises a core 504, an insulating medium 503, an outer conductor 502 and an outer sheath 501 which are coaxially arranged from the inside to the outside, one end of the PCB circuit board 2 extends into the aluminum profile cavity 1, the other end of the PCB circuit board 2 is welded to the core 504 of the coaxial cable 5, and the outer conductor 501 is welded to the outer sheath 501. 502 is welded to the elastic fixing clip 3, and the elastic fixing clip 3 is fixed on the aluminum profile cavity 1. The elastic fixing clip 3 uses the internal stress generated by the elastic deformation of the metal material to generate a preload, so that the elastic fixing clip 3 can be effectively fixed and clamped on the aluminum profile cavity 1, and at the same time can provide reliable metal contact. A U-shaped insulating pad 4 is sleeved on the elastic fixing clip 3, and the U-shaped insulating pad 4 is used to avoid unnecessary metal contact, thereby avoiding the use of screws and electroplating in the fixing method of the antenna phase shifter and the coaxial cable 5, effectively improving the installation efficiency and reducing the production cost.

[0027] In the utility model, long grooves 101 adapted to the elastic fixing clip 3 are respectively provided on the upper and lower surfaces of the aluminum profile cavity 1 and at positions adapted to the elastic fixing clip 3 , for limiting the degree of freedom of the elastic fixing clip 3 and positioning the elastic fixing clip 3 .

[0028] The open end of the elastic fixing clip 3 is covered with a U-shaped insulating pad 4, so that only one or more characteristic bosses 301 are exposed at the opening edge of the elastic fixing clip 3. When the elastic fixing clip 3 is assembled with the aluminum profile cavity 1, only the end surface of the characteristic boss 301 is in contact with the aluminum profile cavity 1, and the rest of the place is not in contact, forming a good conductive relationship.

[0029] The elastic fixing clip 3 is provided with a plurality of through holes 302, and the aluminum profile cavity 1 is provided with a plurality of side through holes 102. The positions of one through hole 302 and one side through hole 102 are adapted to each other and correspond one to one. The wire core 504 passes through the through holes 302 on the elastic fixing clip 3 and the side through holes 102 on the aluminum profile cavity 1, is inserted into the aluminum profile cavity 1, and is welded with the PCB circuit board 2. When the insulating medium 503 outside the wire core 504 passes through the through holes 302 and the side through holes 102 of the elastic fixing clip 3 and the aluminum profile cavity 1, it protects the wire core 504 from contacting with other metals. The outer conductor 502 outside the insulating medium 503 contacts the elastic fixing clip 3 and is welded with solder. The outer conductor 502 is connected to the elastic fixing clip 3. Since the elastic fixing clip 3 and the aluminum profile cavity 1 are connected, the outer conductor 502 is connected to the aluminum profile cavity 1. At this point, the welding of the PCB 2, the aluminum profile cavity 1, and the coaxial cable 5 of the antenna phase shifter is completed.

[0030] The elastic fixing clip 3 is a tinnable metal, such as copper alloy, zinc alloy, etc., or a metal plated with a tinnable coating, such as tin-plated steel, nickel-plated steel, etc. The U-shaped insulating pad 4 has a U-shaped cross section and is compatible with the elastic fixing clip 3 .

[0031] After the U-shaped insulating pad 4 is put on the elastic fixing clip 3, the U-shaped insulating pad 4 is used to protect the side wall insulation of the elastic fixing clip 3, and only the characteristic boss 301 on the elastic fixing clip 3 is exposed. The C-shaped opening distance of the elastic fixing clip 3 is smaller than the thickness of the aluminum profile cavity 1, so the C-shaped opening of the elastic fixing clip 3 needs to be opened and then embedded into the long groove 101 of the aluminum profile cavity 1, thereby limiting the degree of freedom of the elastic fixing clip 3. The characteristic boss 301 of the elastic fixing clip 3 is tightly clamped in the long groove 101 of the aluminum profile cavity 1 under the action of the elastic deformation internal stress of the elastic fixing clip 3. The elastic deformation internal stress of the elastic fixing clip 3 generates a pre-tightening force between the elastic fixing clip 3 and the aluminum profile cavity 1, which plays a role of fixing and reliable conduction. Because of the protection of the U-shaped insulating pad 4, only the end faces of the two exposed characteristic bosses 301 of the elastic fixing clip 3 are in contact with the aluminum profile cavity 1, and the two have a good point contact fit.

[0032] Parts or structures not specifically described in the present invention may adopt existing technologies or existing products and will not be described in detail here.

[0033] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A welding and fixing device for a coaxial cable of an antenna phase shifter, characterized in that: It includes an aluminum profile cavity, a plurality of PCB circuit boards, a plurality of elastic fixing clips and a plurality of coaxial cables. The PCB circuit boards are embedded in the aluminum profile cavity. The elastic fixing clips are clamped on the aluminum profile cavity by the internal stress generated by their own elastic deformation. The coaxial cables are connected to the PCB circuit boards through the elastic fixing clips. The aluminum profile cavity, the elastic fixing clips and the coaxial cables are conductive.

2. The welding and fixing device for the antenna phase shifter coaxial cable according to claim 1, characterized in that: The aluminum profile cavity is connected to the characteristic boss on the elastic fixing clip, the elastic fixing clip is connected to the outer conductor of the coaxial cable, and the core of the coaxial cable is connected to the PCB circuit board.

3. A welding and fixing device for a coaxial cable of an antenna phase shifter according to claim 1 or 2, characterized in that: The coaxial cable includes a wire core, an insulating medium, an outer conductor and an outer sheath which are coaxially arranged in sequence from the inside to the outside. One end of the PCB circuit board extends into the aluminum profile cavity, and the other end of the PCB circuit board is welded together with the wire core and is in conduction. The outer conductor is welded to an elastic fixing clip, and the outer conductor is in conduction with the elastic fixing clip.

4. The welding and fixing device for the antenna phase shifter coaxial cable according to claim 1, characterized in that: Long grooves matching the elastic fixing clip are respectively arranged on the upper and lower surfaces of the aluminum profile cavity and at positions matching the elastic fixing clip, respectively, for limiting the degree of freedom of the elastic fixing clip.

5. The welding and fixing device for the antenna phase shifter coaxial cable according to claim 1, characterized in that: The elastic fixing clip is provided with a plurality of through holes, and the opening edge of the elastic fixing clip is provided with a plurality of characteristic bosses, and the characteristic bosses are in contact with and conduct with the aluminum profile cavity.

6. The welding and fixing device for the antenna phase shifter coaxial cable according to claim 5, characterized in that: The open end of the elastic fixing clip is sleeved with a U-shaped insulating pad, and only the characteristic boss on the elastic fixing clip is exposed.

7. The welding and fixing device for the antenna phase shifter coaxial cable according to claim 5, characterized in that: The aluminum profile cavity is provided with a plurality of side through holes, one through hole is matched with one side through hole and the positions correspond one to one, the core of the coaxial cable passes through the through hole on the elastic fixing clip and the side through hole on the aluminum profile cavity, is inserted into the aluminum profile cavity and is welded to the PCB circuit board, and the insulating medium of the coaxial cable protects the core from contacting other metals when passing through the through hole on the elastic fixing clip and the side through hole on the aluminum profile cavity.

8. The welding and fixing device for the antenna phase shifter coaxial cable according to claim 1, characterized in that: The elastic fixing clip is made of tinnable metal or metal plated with a tinnable coating.

9. The welding and fixing device for the antenna phase shifter coaxial cable according to claim 8, characterized in that: The tinnable metal is a copper alloy or a zinc alloy, and the metal-plated tinnable coating is tin-plated steel or nickel-plated steel.

10. The welding and fixing device for the antenna phase shifter coaxial cable according to claim 1, characterized in that: The U-shaped insulating pad has a U-shaped cross section and is compatible with the elastic fixing clip.

Images