A fixing device for phase shifter and phase shifter

Abstract

The present invention provides a fixing device for a phase shifter and a phase shifter, belonging to the field of wireless communication technology. The fixing device includes a first card plate and a second card plate, the second card plate is detachably fixed to the first card plate, the second card plate has a clamping arm, the clamping arm has an outwardly extending protruding arm, the first card plate has a first convex rib and a second convex rib, the first convex rib extends in a direction close to the protruding arm, and the second convex rib extends from bottom to top in a direction away from the first convex rib. The present invention uses a combined structure, so that the phase shifter does not need to be rotated during the installation process, which can greatly improve the installation efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of wireless communications and relates to a fixing device for a phase shifter and a phase shifter. Background Art

[0002] Microwave devices are indispensable in mobile communication network coverage. Commonly used microwave devices include phase shifters, power dividers, filters, couplers and duplexers. The quality of their performance affects the quality of network coverage, so the importance of microwave devices in the field of mobile communications is self-evident. Cavity-type phase shifters have become the mainstream implementation solution adopted by the industry for phase shifter development due to their many advantages such as integrated cavity molding, screw-free fastening, small size, light weight and low cost. The screw-free installation solution has also gradually become the mainstream design form for fixed installation of cavity-type phase shifters due to its advantages such as miniaturization of applicable antennas and quick installation.

[0003] A Chinese patent document with publication number CN104089154B discloses a connector and a communication device. The communication device does not require any metal screws for fastening. The connector is clamped on a reflector and then a phase shifter is rotated and buckled into the connector.

[0004] However, the above connector and communication device also have some defects: first, the connector needs to be pre-pressed and clamped on the reflector, and the phase shifter is rotated and buckled into the connector to achieve the installation of the phase shifter. However, in engineering practice, as a component, the phase shifter is often welded with many coaxial cables of different lengths. Due to the existence of coaxial cables, it is often inconvenient to rotate the phase shifter into the connector. On the other hand, due to the need for electrical performance, the length of the phase shifter is often relatively long, which further affects the convenience of rotating the phase shifter into the connector; secondly, the pin structure on the connector is matched with the hole on the phase shifter cavity. On the one hand, due to the insufficient mechanical properties of the pin material, the impact resistance of the phase shifter is limited. On the other hand, when the phase shifter is rotated and buckled into the connector, the pin is located on the lower surface of the phase shifter, and the visualization of the installation operation is poor. When rotating and buckling, the pin and the cavity are prone to misalignment and structural interference, making the installation of the phase shifter inconvenient.

[0005] The phase shifter fixing seat disclosed in the Chinese patent document with publication number CN106876867A, on the one hand, rotates the fixing seat in advance and snaps it onto the phase shifter cavity, and then pushes it onto the reflector along with the phase shifter assembly, and on the other hand, it also incorporates the function of fixing and protecting the coaxial cable on the phase shifter cavity, expanding the auxiliary functions of the phase shifter fixing device. However, the fixing seat also has certain shortcomings: the pin on the fixing seat limits the impact resistance of the phase shifter due to the insufficient mechanical properties of the material, and the chamfering of the pin further affects the impact resistance of the phase shifter. In addition, when the phase shifter assembly pre-installed on the fixing seat is pushed into the reflector, the convenience of installing the phase shifter is also affected by factors such as the length of the phase shifter, the length and number of the welded coaxial cables, etc. Summary of the invention

[0006] In view of the above problems existing in the prior art, the present invention provides a fixing device for a phase shifter. The technical problem to be solved by the present invention is: how to improve the convenience of installing the phase shifter.

[0007] The purpose of the present invention can be achieved by the following technical solutions:

[0008] A fixing device for a phase shifter, the fixing device comprising a first clamping plate and a second clamping plate, the second clamping plate being detachably fixed to the first clamping plate, the second clamping plate having a clamping arm, the clamping arm having an outwardly extending protruding arm, the first clamping plate having a first convex rib and a second convex rib, the first convex rib extending in a direction approaching the protruding arm, and the second convex rib extending from bottom to top in a direction away from the first convex rib.

[0009] In the above-mentioned fixing device for a phase shifter, the first convex rib and the second convex rib form a receiving groove.

[0010] In the above-mentioned fixing device for a phase shifter, the second clamping plate includes a main board body, the two clamping arms are respectively located on one end of the main board body, the clamping arms are arranged opposite to each other, the first ribs and the second ribs are both two, each first rib is respectively located on one end of the first clamping plate and extends along the edge of the corresponding end, each second rib forms a receiving groove with the corresponding first rib, and the extension direction of each second rib is consistent with that of the corresponding first rib.

[0011] The second clamping plate has a U-shaped structure, and the protruding arms on each clamping arm form an elastic clamping structure with a first convex rib respectively. The two elastic clamping structures respectively clamp and fix the protruding tongue on the cavity of the phase shifter. This structure makes the connection between the fixing device and the cavity of the phase shifter more stable.

[0012] In the above-mentioned fixing device for a phase shifter, the extending arm gradually moves away from the clamping arm where the extending arm is located from top to bottom, and the first convex rib gradually approaches the corresponding clamping arm from bottom to top.

[0013] In the above-mentioned fixing device for a phase shifter, the first card plate has a positioning column, and the second card plate has a pin that can be plugged and fixed on the positioning column. In this structure, the connection and fixation between the first card plate and the second card plate is achieved by plugging and fixing the pin on the positioning column. This structure limits the movement of the phase shifter cavity in the horizontal direction (front, back, left, right). There can be more than two pins and positioning columns, and each pin is plugged and fixed on a corresponding positioning column. The more the number of pins and positioning columns, the more firmly the first card plate and the second card plate are fixed. As an embodiment, the pin and the positioning column are cylindrical.

[0014] In the above-mentioned fixing device for a phase shifter, the pin shaft is located on the upper surface of the second clamping plate, and the lower surface of the second clamping plate has an inserting boss and a limiting boss.

[0015] In this structure, the plug-in boss is used to connect with the fixing hole on the reflective plate (not shown), so as to fix the second clamping plate on the reflective plate, and the limiting boss is used to insert into the limiting hole (not shown) opened on the reflective plate to play a limiting role.

[0016] In the above-mentioned fixing device for a phase shifter, the first clamping plate is an engineering plastic part and is made by injection molding.

[0017] The first clamping plate made of engineering plastics by injection molding has good strength and toughness, so that the first convex rib, the second convex rib and the positioning column on the first clamping plate can withstand a large impact load. The first convex rib and the second convex rib have better elasticity, making the connection between the fixing device and the phase shifter more stable and reliable, ensuring good stability.

[0018] In the above-mentioned fixing device for a phase shifter, the second clamping plate is an engineering plastic part and is made by injection molding.

[0019] The second clamping plate made of engineering plastics by injection molding has good strength and toughness and can withstand large impact loads. The extended arm on the second clamping plate also has good deformation ability and better elasticity, making the connection between the fixing device and the phase shifter more stable and reliable.

[0020] Another object of the present invention is to provide a phase shifter applied to the above-mentioned fixing device:

[0021] The phase shifter includes a cavity having a wiring groove extending along the length direction of the cavity and a protruding tongue extending outward, wherein the protruding tongue is located on one side of the wiring groove and extends along the length direction of the cavity, the lower end of the extending arm can abut against the top of the protruding tongue, and the first rib and the second rib can be elastically pressed against the inner wall of the wiring groove and abut against the inner wall of the wiring groove respectively.

[0022] In the above-mentioned phase shifter, the bottom of the cavity has a positioning hole. The positioning hole is used to cooperate with the positioning column to limit the fixing device. As an embodiment, the positioning column is cylindrical and the positioning hole is semicircular.

[0023] The working principle of the fixing device and the phase shifter is as follows: the fixing device comprises a first clamping plate and a second clamping plate fixed to each other, the extending arm on the clamping arm extends outward and has a certain elasticity, the extending arm on the clamping arm and the first convex rib form an elastic clamping structure, and the elastic clamping structure is used to clamp and fix the convex tongue on the cavity of the phase shifter. When the first clamping plate is installed with the cavity of the phase shifter, each first clamping plate is moved along the length direction of the cavity of the phase shifter from the front and rear ends of the length direction of the cavity of the phase shifter and pushed into the cavity of the phase shifter, so that the first convex rib and the second convex rib move along the wiring groove until the positioning column contacts the positioning hole, and the first clamping plate reaches the predetermined position. The first convex rib and the second convex rib have a certain elasticity, and the two form a V-shaped rib and are located in the wiring groove. The first convex rib and the second convex rib can be elastically pressed against the inner wall of the wiring groove and respectively abut against the inner wall of the wiring groove, so that during the installation process, the V-shaped rib and the wiring groove of the cavity can be firmly connected without the help of external force, and the two will not fall off and separate, so that the first clamping plate can be pushed in and installed by a linear movement, which is simple and quick.

[0024] When the first clamping plate and the phase shifter cavity are installed, the assembled assembly is moved from top to bottom. When the protruding tongue of the cavity contacts the extending arm on the first clamping plate, a force with a constant direction is continuously applied. At this time, the extending arm is deformed by the force and has elastic force until the axle pin is plugged and fixed on the positioning column. At this time, the protruding tongue is pressed between the extending arm and the first rib. The outer end of the extending arm is slightly higher than the top of the protruding tongue and the two are against each other, which limits the movement of the phase shifter cavity in the up and down directions.

[0025] When the phase shifter cavity is subjected to an upward external load, the extending arm is always in contact with the top of the tongue and deforms obliquely upward, and as the external load increases, the extending arm produces a greater elastic deformation, thereby providing a greater force in the opposite direction, so that the connection between the phase shifter cavity and the group fixing device is always stable and reliable.

[0026] Compared with the prior art, the advantages of the present invention are as follows:

[0027] 1. The present invention adopts a combined structure, so that the phase shifter does not need to be rotated during the installation process, which greatly improves the installation efficiency.

[0028] 2. The present invention adopts a combined structure so that during installation, the matching structure of the fixing device and the phase shifter cavity is always in a visible state, which is convenient for installation, operation and maintenance inspection.

[0029] 3. The fixing device of the present invention makes full use of the preset structure in the phase shifter cavity, occupies less space, and is connected to the phase shifter and the reflector plate without any screw fastening, and the fixing device has a simple structure.

[0030] 4. The extending arm of the present invention and the V-shaped rib form an elastic engaging structure, which has an anti-slip function, making the connection between the fixing device and the phase shifter more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the fixing device;

[0032] Figure 2 It is a schematic diagram of the reverse structure of the fixing device;

[0033] Figure 3 1 is a schematic diagram of the structure of the second card board;

[0034] Figure 4 is a structural schematic diagram of a first card board;

[0035] Figure 5 It is a cross-sectional view of the V-shaped rib;

[0036] Figure 6 It is an exploded view of the fixture, phase shifter cavity and reflector;

[0037] Figure 7 is a schematic diagram of the fixing device and the phase shifter cavity during installation;

[0038] Figure 8 It is a schematic diagram of the fixing device and the phase shifter cavity after installation.

[0039] In the figure, 1, fixing device; 11, first clamping plate; 110, positioning column; 111, receiving groove; 112, V-shaped rib; 1120, first convex rib; 1121, second convex rib; 12, second clamping plate; 120, clamping arm; 121, main board; 122, pin shaft; 123, extending arm; 124, plug-in boss; 125, limiting boss; 13, cavity; 130, wiring groove; 131, protruding tongue; 132, positioning hole; 14, reflecting plate. DETAILED DESCRIPTION

[0040] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0041] like Figure 1-4 As shown, the fixing device 1 includes a first clamping plate 11 and a second clamping plate 12, the second clamping plate 12 is detachably fixed on the first clamping plate 11, the second clamping plate 12 has a clamping arm 120, the clamping arm 120 has an outwardly extending protruding arm 123, the first clamping plate 11 has a first convex rib 1120 and a second convex rib 1121, the first convex rib 1120 extends in a direction close to the protruding arm 123, and the second convex rib 1121 extends from bottom to top in a direction away from the first convex rib 1120.

[0042] like Figure 4-8 As shown, in this embodiment, the first convex rib 1120 and the second convex rib 1121 form a receiving groove 111 , and the first convex rib 1120 and the second convex rib 1121 are in the structure of a V-shaped rib 112 and are located in the wiring groove 130 .

[0043] like Figure 3 As shown, in this embodiment, the second clamping plate 12 includes a main board body 121, two clamping arms 120 are respectively located on one end of the main board body 121, the clamping arms 120 are arranged opposite to each other, and there are two first ribs 1120 and two second ribs 1121. Each first rib 1120 is respectively located on one end of the first clamping plate 11 and extends along the edge of the corresponding end. Each second rib 1121 forms a receiving groove 111 with the corresponding first rib 1120, and the extension direction of each second rib 1121 is consistent with that of the corresponding first rib 1120.

[0044] The second clamping plate 12 has a U-shaped structure. The protruding arms 123 on each clamping arm 120 form an elastic snap-fitting structure with a first rib 1120 respectively. The two elastic snap-fitting structures respectively snap-fit ​​and fix the tongue 131 on the cavity 13 of the phase shifter. This structure makes the connection between the fixing device 1 and the cavity 13 of the phase shifter more stable.

[0045] like Figure 1 As shown, in this embodiment, the extending arm 123 gradually moves away from the clamping arm 120 where the extending arm 123 is located from top to bottom, and the first rib 1120 gradually moves closer to the corresponding clamping arm 120 from bottom to top.

[0046] like Figure 3 and 4As shown, in this embodiment, the first card plate 11 has a positioning column 110, and the second card plate 12 has a pin 122 that can be plugged and fixed on the positioning column 110. In this structure, the connection and fixation between the first card plate 11 and the second card plate 12 is achieved by plugging and fixing the pin 122 on the positioning column 110. This structure limits the movement of the phase shifter cavity 13 in the horizontal direction (front, back, left, right). There can be more than two pins 122 and positioning columns 110, and each pin 122 is respectively plugged and fixed on a corresponding positioning column 110. The more the number of pins 122 and positioning columns 110, the more firmly the first card plate 11 and the second card plate 12 are fixed. As an embodiment, the pin 122 and the positioning column 110 are cylindrical.

[0047] like Figure 2 and 3 As shown, in this embodiment, the pin shaft 122 is located on the upper surface of the second clamping plate 12 , and the lower surface of the second clamping plate 12 has an inserting boss 124 and a limiting boss 125 .

[0048] In this structure, the plug-in boss 124 is used to connect with the fixing hole on the reflective plate 14 (not shown), thereby fixing the second clamping plate 12 on the reflective plate 14, and the limiting boss 125 is used to insert into the limiting hole (not shown) opened on the reflective plate 14 to play a limiting role.

[0049] As an embodiment, the first clamping plate 11 is an engineering plastic part and is made by injection molding.

[0050] The first clamping plate 11 made of engineering plastic and processed by injection molding has good strength and toughness, so that the first rib 1120, the second rib 1121 and the positioning column 110 on the first clamping plate 11 can withstand a large impact load. The first rib 1120 and the second rib 1121 have better elasticity, making the connection between the fixing device 1 and the phase shifter more stable and reliable, ensuring good stability.

[0051] As an embodiment, the second clamping plate 12 is an engineering plastic part and is made by injection molding.

[0052] The second clamping plate 12 made of engineering plastic by injection molding has good strength and toughness and can withstand large impact loads. The extending arm 123 on the second clamping plate 12 also has good deformation ability and better elasticity, making the connection between the fixing device 1 and the phase shifter more stable and reliable.

[0053] like Figure 7 and 8As shown, the phase shifter includes a cavity 13, which has a wiring groove 130 extending along the length direction of the cavity 13 and a tongue 131 extending outward, the tongue 131 is located on one side of the wiring groove 130 and extends along the length direction of the cavity 13, the lower end of the extended arm 123 can abut against the top of the tongue 131, and the first rib 1120 and the second rib 1121 can be elastically pressed against the inner wall of the wiring groove 130 and abut against the inner wall of the wiring groove 130 respectively.

[0054] like Figure 6 As shown, in this embodiment, the bottom of the cavity 13 has a positioning hole 132. The positioning hole 132 is used to cooperate with the positioning column 110 to limit the fixing device 1. As an embodiment, the positioning column 110 is cylindrical and the positioning hole 132 is semicircular.

[0055] like Figure 1-8 As shown, the fixing device 1 includes a first clamping plate 11 and a second clamping plate 12 fixed to each other, and the protruding arm 123 on the clamping arm 120 protrudes outward and has a certain elasticity. The protruding arm 123 on the clamping arm 120 and the first convex rib 1120 form an elastic snap-fit ​​structure, and the elastic snap-fit ​​structure is used to snap-fit ​​and fix the convex tongue 131 on the cavity 13 of the phase shifter. When the first clamping plate 11 is installed with the cavity 13 of the phase shifter, each first clamping plate 11 is moved along the length direction of the cavity 13 of the phase shifter from the front and rear ends in the length direction of the cavity 13 of the phase shifter and pushed into the cavity 13 of the phase shifter, so that the first convex rib 1120 and the second convex rib 1121 move along the wiring groove 130 until the positioning column 110 contacts the positioning hole 132, and the first clamping plate 11 reaches the predetermined position. The first rib 1120 and the second rib 1121 have a certain elasticity, and the two form a V-shaped rib 112 and are located in the wiring groove 130. The first rib 1120 and the second rib 1121 can be elastically pressed against the inner wall of the wiring groove 130 and respectively abut against the inner wall of the wiring groove 130, so that during the installation process, the V-shaped rib 112 can be firmly connected to the wiring groove 130 of the cavity 13 without the aid of external force, and the two will not fall off and separate, so that the first card plate 11 can be pushed in and installed by a linear movement, which is simple and quick.

[0056] After the first clamping plate 11 and the phase shifter cavity 13 are installed, the assembled assembly is moved from top to bottom. When the tongue 131 of the cavity 13 contacts the protruding arm 123 on the first clamping plate 11, a force with a constant direction is continuously applied. At this time, the protruding arm 123 is deformed by the force and has elastic force until the axle pin is plugged and fixed on the positioning column 110. At this time, the tongue 131 is pressed between the protruding arm 123 and the first rib 1120. The outer end of the protruding arm 123 is slightly higher than the top of the tongue 131 and the two are against each other, which limits the movement of the phase shifter cavity 13 in the up and down directions.

[0057] When the phase shifter cavity 13 is subjected to an upward external load, the extending arm 123 is always in contact with the top of the tongue 131 and deforms obliquely upward, and as the external load increases, the extending arm 123 produces a greater elastic deformation, thereby providing a greater force in the opposite direction, so that the connection between the phase shifter cavity 13 and the fixing device 1 is always stable and reliable.

[0058] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A fixing device for a phase shifter, the fixing device (1) comprising a first clamping plate (11) and a second clamping plate (12), characterized in that: The second clamping plate (12) is detachably fixed to the first clamping plate (11), the second clamping plate (12) has a clamping arm (120), the clamping arm (120) has a protruding arm (123) extending outwards, the first clamping plate (11) has a first convex rib (1120) and a second convex rib (1121), the first convex rib (1120) extends in a direction approaching the protruding arm (123), and the second convex rib (1121) extends from bottom to top in a direction away from the first convex rib (1120); The first convex rib (1120) and the second convex rib (1121) form a receiving groove (111); The second clamping plate (12) comprises a main body (121), the number of the clamping arms (120) being two and respectively located on one end of the main body (121), the number of the clamping arms (120) being opposite to each other, the number of the first convex rib (1120) and the number of the second convex rib (1121) being two, each of the first convex rib (1120) being respectively located on one end of the first clamping plate (11) and extending along the edge of the corresponding end, each of the second convex ribs (1121) and the corresponding first convex rib (1120) forming a receiving groove (111), and each of the second convex ribs (1121) and the corresponding first convex rib (1120) extending in the same direction; The extending arm (123) gradually moves away from the clamping arm (120) where the extending arm (123) is located from top to bottom, and the first convex rib (1120) gradually moves closer to the corresponding clamping arm (120) from bottom to top; The first clamping plate (11) is provided with a positioning column (110), and the second clamping plate (12) is provided with a pin shaft (122) which can be plugged into and fixed on the positioning column (110).

2. A fixing device for a phase shifter according to claim 1, characterized in that: The pin shaft (122) is located on the upper surface of the second clamping plate (12), and the lower surface of the second clamping plate (12) has an inserting boss (124) and a limiting boss (125).

3. A fixing device for a phase shifter according to claim 1, characterized in that: The first clamping plate (11) is an engineering plastic part and is made by injection molding.

4. A fixing device for a phase shifter according to claim 1, characterized in that: The second clamping plate (12) is an engineering plastic part and is made by injection molding.

5. A phase shifter, installed by using the fixing device according to any one of claims 1 to 4, the phase shifter comprising a cavity (13), characterized in that: The cavity (13) has a wiring groove (130) extending along the length direction of the cavity (13) and a protruding tongue (131) extending outward, the protruding tongue (131) is located on one side of the wiring groove (130) and extends along the length direction of the cavity (13), the lower end of the extending arm (123) can abut against the top of the protruding tongue (131), and the first convex rib (1120) and the second convex rib (1121) can be elastically pressed against the inner wall of the wiring groove (130) and abut against the inner wall of the wiring groove (130) respectively.

6. The phase shifter according to claim 5, characterized in that: The bottom of the cavity (13) is provided with a positioning hole (132).

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