Linkage driving synchronous switching structure of single-pole double-throw type load carrying radio frequency switch

Abstract

The application relates to the technical field of radio frequency switches, in particular to a single-pole double-throw type load radio frequency switch connecting rod transmission synchronous switching structure which comprises a fixed base, a first channel switching plate and a second channel switching plate, conductor spring sheets arranged below the two ends of the first channel switching plate and the second channel switching plate, conductor spring sheets penetrating through the base and riveted with spring top rods, an electromagnetic coil and a coil iron core, the electromagnetic coil and the coil iron core being arranged above the two ends of the second channel switching plate, and the coil iron core being arranged on the inner side of the electromagnetic coil. The application adopts a center connecting rod to connect two groups of symmetrical channel switching plates, has small changes, a compact structure and optimized internal space, cancels a group of channel switching electromagnetic coils and other electromagnetic components, reduces assembly time, improves efficiency, reduces heating components after electrification such as electromagnetic coils, generates less heat in the switch, reduces the failure rate, the structure reduces part of components, and can reduce material and processing costs.

Description

Technical Field

[0001] This application relates to the field of radio frequency switch technology, and in particular to a single-pole double-throw type loaded radio frequency switch linkage drive synchronous switching structure. Background Technology

[0002] Existing single-pole double-throw RF switches require two sets of channel switching boards to simultaneously connect channel 2 to the external load when channel 0-1 is conducting. These boards switch the connectors of channels 1 and 2 to the common terminal connector, simultaneously switching the connectors of the opposite channels to the load terminal. Each switching board requires two electromagnetic coils and one permanent magnet to form a magnetic field circuit. Thus, a total of four electromagnetic coils and two permanent magnets are needed within one switch. An iron core is inserted inside each of the four electromagnetic coils. When energized, the iron core generates a magnetic field, and the magnetic force on the iron core causes the RF switch to switch. This switching structure has the following problems:

[0003] 1. Numerous parts, complex structure, and high cost;

[0004] 2. The assembly process is numerous and complex, which affects production efficiency;

[0005] 3. The coil generates a lot of heat, resulting in a high failure rate;

[0006] 4. Miniaturization is limited by space constraints.

[0007] Based on this, those skilled in the art have proposed a single-pole double-throw type loaded radio frequency switch linkage synchronous switching structure, which provides a new solution to the above-mentioned technical problems. Summary of the Invention

[0008] To address the problems mentioned in the background art, this application provides a single-pole double-throw type loaded radio frequency switch linkage synchronous switching structure.

[0009] The single-pole double-throw type loaded radio frequency switch linkage synchronous switching structure provided in this application adopts the following technical solution:

[0010] A single-pole double-throw type on-load radio frequency switch linkage drive synchronous switching structure includes:

[0011] Fixed base;

[0012] The first channel switching plate and the second channel switching plate are rotatably mounted on the fixed base by means of pins;

[0013] A conductor spring is located below both ends of the first channel switching plate and the second channel switching plate. The conductor spring passes through the base and is riveted with a spring top rod, and is used to connect or disconnect the channel from the load.

[0014] The electromagnetic coil and coil core are only located above both ends of the second channel switching plate, and the coil core is located inside the electromagnetic coil.

[0015] The central connecting rod is rotatably connected to the fixed base via a connecting rod pin. Its two ends are respectively connected to the ends of the first channel switching plate and the second channel switching plate, so that when the electromagnetic coil is energized, the first channel switching plate and the second channel switching plate can rotate in the same direction.

[0016] By adopting the above technical solution, two sets of symmetrical channel switching plates are connected by a central connecting rod. The modification is small, the structure is compact, and the internal space is optimized. Since one set of channel switching electromagnetic coils and other electromagnetic components are eliminated, the assembly time is reduced and the efficiency is improved. Since the electromagnetic coils and other components that generate heat after being powered on are reduced, less heat is generated inside the switch, and the failure rate is reduced. This structure reduces some parts, which can reduce material and processing costs.

[0017] Optionally, the central connecting rod has U-shaped grooves at both ends, and the first channel switching plate and the second channel switching plate have movable grooves on the inner side of the end near the central connecting rod. A mandrel is press-fitted into the inner side of the movable groove, and the central connecting rod is connected to the mandrel through the U-shaped groove to form a connecting rod slider mechanism.

[0018] By adopting the above technical solution, two sets of symmetrical channel switching plates are connected by a central connecting rod. By setting a reasonable fitting gap, excellent synchronization between the two sets of switching plates can be guaranteed.

[0019] Optionally, nylon gaskets are provided between the two sides of the central connecting rod and the fixed base;

[0020] By adopting the above technical solution, the friction between the central connecting rod and the fixed base can be reduced, thereby increasing its service life.

[0021] Optionally, an elastic preload mechanism is provided between the central connecting rod and the spindle to eliminate the mating clearance caused by long-term wear;

[0022] By adopting the above technical solution, the mating clearance caused by long-term wear of the mandrel can be eliminated.

[0023] Optionally, the elastic pre-tightening mechanism is a U-shaped spring sheet, which is embedded in and matches the U-shaped groove.

[0024] By adopting the above technical solution, the U-shaped spring design can eliminate the mating clearance caused by long-term wear of the spindle, greatly improving its service life. Moreover, the structure is simple and the cost is low.

[0025] Optionally, a heat dissipation channel is provided on the inner side of the coil core;

[0026] By adopting the above technical solution, the temperature of the coil core during use can be effectively reduced, thereby reducing the impact on switching accuracy caused by the slight deformation due to high temperature.

[0027] Optionally, a redundant holding magnetic ring is embedded on the inner side of the bottom of the coil core to provide holding force after the electromagnetic coil is de-energized and to prevent accidental switching. A heat dissipation hole matching the heat dissipation channel is opened on its inner side.

[0028] By adopting the above technical solution, a holding force can be provided after the electromagnetic coil is de-energized, preventing accidental switching.

[0029] Optionally, the mandrel includes a shaft body pressed into the inner side of the movable groove and a roller rotatably connected to the outer side of the shaft body, the roller being adapted to the U-shaped spring.

[0030] By adopting the above technical solution, the original contact between the mandrel body and the U-shaped spring is replaced by the setting of rollers, and the rolling friction between the rollers and the U-shaped spring is replaced by the original sliding friction between the mandrel and the U-shaped spring, which changes the friction mode at the contact end and thus improves the service life of the mandrel.

[0031] Optionally, two U-shaped springs are provided, which are respectively installed on both sides inside the U-shaped groove. A retaining strip is provided on the outer side of the closed end of the U-shaped spring. The two sides inside the central connecting rod are provided with retaining grooves that are adapted to the retaining strip. A connecting buckle is fixed at one end of the two U-shaped springs close to each other. The two connecting buckles are fastened to each other. A disassembly groove is provided on both sides of the bottom of the U-shaped groove and below the U-shaped spring.

[0032] By adopting the above technical solution, the two U-shaped springs are symmetrically arranged, which can significantly offset the lateral force, prevent the spindle from shaking or wearing unevenly in the U-shaped groove, and improve the motion accuracy and stability. At the same time, the cooperation between the clip and the groove allows the U-shaped springs to be installed quickly, and the design of the connecting buckle prevents the U-shaped springs from falling off during use. The design of the disassembly groove facilitates the disassembly of the U-shaped springs. When the U-shaped springs themselves are worn or lose their elasticity, it is not necessary to disassemble the entire slider or the main body of the mechanism; only the U-shaped springs need to be replaced.

[0033] Optionally, an adjusting screw is threadedly connected to the inner side of the central connecting rod and above the U-shaped groove.

[0034] By adopting the above technical solution, the initial preload of the U-shaped spring on the spindle can be finely adjusted during installation or maintenance to adapt to different working conditions or compensate for manufacturing tolerances. At the same time, it can actively compensate for the gap caused by the lack of elasticity when the elasticity of the U-shaped spring is not good.

[0035] In summary, this application includes at least one of the following beneficial technical effects:

[0036] This invention uses a central connecting rod to connect two sets of symmetrical channel switching plates. It has minimal modifications, a compact structure, and optimized internal space. By eliminating a set of electromagnetic components such as channel switching electromagnetic coils, assembly time is reduced and efficiency is improved. By reducing the number of components that generate heat when powered on, such as electromagnetic coils, less heat is generated inside the switch, resulting in a lower failure rate. This structure reduces some parts, which can reduce material and processing costs.

[0037] The present invention provides a redundant holding magnetic ring to provide holding force after the electromagnetic coil is de-energized, thereby preventing accidental switching.

[0038] This invention eliminates the clearance caused by long-term wear of the mandrel through the design of a U-shaped spring, greatly improving its service life. It also has a simple structure and low cost.

[0039] This invention utilizes two symmetrically arranged U-shaped springs to significantly counteract lateral forces, preventing the spindle from wobbling or wearing unevenly within the U-shaped groove, thus improving motion accuracy and stability. Simultaneously, the cooperation between the locking strip and the slot allows for quick installation of the U-shaped springs, and the connecting buckle design prevents them from falling off during use. The disassembly groove design facilitates the removal of the U-shaped springs. When the U-shaped springs themselves wear out or lose elasticity, it is not necessary to disassemble the entire slider or mechanism body; only the U-shaped springs need to be replaced.

[0040] This invention, through the design of the adjusting screw, allows for fine adjustment of the initial preload of the U-shaped spring on the spindle during installation or maintenance, in order to adapt to different working conditions or compensate for manufacturing tolerances. At the same time, it can actively compensate for the gap caused by the lack of elasticity when the elasticity of the U-shaped spring is poor. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the synchronous switching structure of the single-pole double-throw type loaded radio frequency switch linkage in an embodiment of this application.

[0042] Figure 2 This is a schematic diagram of the main view structure of an embodiment of this application.

[0043] Figure 3 This is a cross-sectional structural diagram of an embodiment of this application.

[0044] Figure 4 This is a schematic diagram of the structure of the central connecting rod, the first channel switching plate, and the second channel switching plate in the embodiments of this application.

[0045] Figure 5 This is a schematic diagram of the structure of the U-shaped spring sheet in an embodiment of this application.

[0046] Figure 6 This is a schematic diagram of the structure of the mandrel in the embodiment of this application when no wear occurs.

[0047] Figure 7This is a schematic diagram of the structure when the mandrel in an embodiment of this application is worn.

[0048] Figure 8 This is a schematic diagram of the heat dissipation channel and the redundant retaining magnetic ring in an embodiment of this application.

[0049] Figure 9 This is a schematic diagram of the structure of the roller in an embodiment of this application.

[0050] Figure 10 This is a schematic diagram of the structure of the connecting buckle in an embodiment of this application.

[0051] Figure 11 This is a schematic diagram of the card strip structure in an embodiment of this application.

[0052] Figure 12 This is a schematic diagram of the card slot structure according to an embodiment of this application.

[0053] Figure 13 This is a schematic diagram of the structure of the adjusting screw in an embodiment of this application.

[0054] Explanation of reference numerals in the attached figures:

[0055] 1. Fixed base; 2. Conductor spring; 3. Switching plate pin; 4. Spring top rod; 5. First channel switching plate; 6. Connecting rod pin; 7. Nylon gasket; 8. Central connecting rod; 9. Core shaft; 10. Second channel switching plate; 11. Coil core; 12. Electromagnetic coil; 13. Return spring; 14. Top plate; 15. Connecting post; 16. Movable groove; 17. U-shaped groove; 18. U-shaped spring; 19. Heat dissipation channel; 20. Redundant retaining magnetic ring; 21. Shaft; 22. Roller; 23. Connecting buckle; 24. Disassembly groove; 25. Locking strip; 26. Locking slot; 27. Adjusting screw. Detailed Implementation

[0056] To enable those skilled in the art to better understand the technical solution of the present invention, the following will be described in conjunction with the appendix. Figure 1-8 This application will now be described in further detail.

[0057] Reference Figure 1-8 This application provides a single-pole double-throw type on-load radio frequency switch linkage synchronous switching structure, including:

[0058] The fixed base 1 and the top plate 14 are fixedly connected by connecting posts 15 at the four corners to form a mounting frame.

[0059] The first channel switching plate 5 and the second channel switching plate 10 are symmetrically installed on the fixed base and are rotatably installed on the fixed base 1 through the switching plate pin 3 respectively;

[0060] Conductor spring 2 is located below both ends of the first channel switching plate 5 and the second channel switching plate 10. Conductor spring 2 passes through the base and is riveted with spring top rod 4, and is used to connect or disconnect the frequency channel from the load.

[0061] The electromagnetic coil 12 and the coil core 11 are only located above both ends of the second channel switching plate 10, and the coil core 11 is located inside the electromagnetic coil 12.

[0062] The central connecting rod 8 is rotatably connected to the fixed base 1 via the connecting rod pin 6. Its two ends are respectively connected to the ends of the first channel switching plate 5 and the second channel switching plate 10, so that when the electromagnetic coil 12 is energized, the first channel switching plate 5 and the second channel switching plate 10 can rotate in the same direction.

[0063] A return spring 13 is fitted on the outside of the spring top rod 4 and on the top of the fixed base 1. When the return spring 13 is in its natural state, the conductor spring 2 abuts against the bottom end face of the fixed base 1.

[0064] Reference Figure 4 Both ends of the central connecting rod 8 are provided with U-shaped grooves 17. The inner side of the first channel switching plate 5 and the second channel switching plate 10 near the central connecting rod 8 is provided with movable grooves 16. The inner side of the movable groove 16 is press-fitted with a spindle 9. The end of the central connecting rod 8 is inserted into the inner side of the movable groove 16 and connected to the spindle 9 through the U-shaped groove 17 to form a connecting rod slider mechanism. This allows the first channel switching plate 5 to rotate synchronously through the central connecting rod 8 when the second channel switching plate 10 rotates, thereby controlling the two sets of switches simultaneously through a set of electromagnetic coils.

[0065] To improve the wear resistance of the mandrel 9 and the U-shaped groove 17, a low-friction coating can be applied to the surface of the mandrel 9 and the inner wall of the U-shaped groove 17 of the central connecting rod 8. The coating can be a molybdenum disulfide-graphene composite dry film.

[0066] Nylon gaskets 7 are provided between the two sides of the central connecting rod 8 and the fixed base 1, which can reduce the friction between the central connecting rod 8 and the fixed base 1 and improve its service life.

[0067] Reference Figure 4-7 An elastic preload mechanism is provided between the central connecting rod 8 and the spindle 9 to eliminate the clearance caused by long-term wear.

[0068] The elastic preload mechanism is a U-shaped spring 18, which is embedded in and matches the U-shaped groove 17. One end of the U-shaped spring 18 is fixed to the inside of the U-shaped groove 17 by a screw, while the other end is in a free state. The spindle 9 moves inside the U-shaped spring 18. When the spindle 9 is not worn, it pushes the free end of the U-shaped spring 18 outward so that it is tightly attached to the inner wall of the U-shaped groove 17. When the spindle 9 is worn, its outer diameter becomes smaller, and the free end of the U-shaped spring 18 contracts inward under its own elasticity, still tightly attached to the outer wall of the spindle 9. This can compensate for the fit gap caused by the wear of the spindle 9, improve the switching accuracy of the RF switch, and thus greatly improve the service life.

[0069] Reference Figure 8 The inner side of the coil core 11 is provided with a heat dissipation channel 19, and a mounting thread hole is provided on the outer periphery of the top of the heat dissipation channel 19 to facilitate disassembly and assembly without affecting heat dissipation.

[0070] Reference Figure 8 The inner bottom of the coil core 11 is provided with a redundant holding magnetic ring 20, which is used to provide holding force after the electromagnetic coil 12 is de-energized to prevent accidental switching. The inner side of the ring has heat dissipation holes that match the heat dissipation channel 19.

[0071] Reference Figure 9 The mandrel 9 includes a shaft 21 press-fitted inside the movable groove 16 and a roller 22 rotatably connected to the outside of the shaft 21. The roller 22 is adapted to the U-shaped spring 18. The roller 22 replaces the original contact between the mandrel 9 body and the U-shaped spring 18. The rolling friction between the roller 22 and the U-shaped spring 18 replaces the original sliding friction between the mandrel 9 and the U-shaped spring 18, thus changing the friction mode at the contact end and improving the service life of the mandrel 9.

[0072] Reference Figure 10-12 Two U-shaped spring pieces 18 are provided, which are respectively installed on both sides inside the U-shaped groove 17. The outer side of the closed end of the U-shaped spring piece 18 is provided with a retaining strip 25. The inner sides of the central connecting rod 8 are provided with retaining grooves 26 that are compatible with the retaining strip 25. The two U-shaped spring pieces 18 are fixed with a connecting buckle 23 at one end close to each other, and the two connecting buckles 23 are fastened to each other.

[0073] It should be noted that the design of the connecting buckle 23 has a certain degree of elasticity. When the two U-shaped spring pieces 18 approach each other, the two connecting buckles 23 abut against each other and then fasten together. During the fastening process, the two connecting buckles 23 first abut against each other so that the two heads move away from each other, and then the heads return to their original position and fasten together under their own elastic force.

[0074] A disassembly groove 24 is provided on both sides of the bottom of the U-shaped groove 17 and below the U-shaped spring piece 18. The pre-set disassembly groove 24 facilitates the disassembly of the U-shaped spring piece 18. During disassembly, a tool is used to pry the two interlocking connecting buckles 23 apart, and then tweezers are inserted into the disassembly groove 24 to clamp the U-shaped spring piece 18. The symmetrical arrangement of the two U-shaped spring pieces 18 can significantly offset the lateral force, prevent the spindle 9 from shaking or wearing unevenly in the U-shaped groove 17, and improve the motion accuracy and stability. At the same time, the cooperation between the locking strip 25 and the locking groove 26 allows the U-shaped spring piece 18 to be quickly installed, and the design of the connecting buckle 23 prevents the U-shaped spring piece 18 from falling off during use.

[0075] The design of the disassembly slot 24 facilitates the disassembly of the U-shaped spring 18. When the U-shaped spring 18 is worn or loses its elasticity, it is not necessary to disassemble the entire slider or the main body of the mechanism. Only the U-shaped spring 18 needs to be replaced. This allows the U-shaped spring 18 to be replaced without disassembling the overall structure, improving the convenience of disassembly and assembly, and also increasing the service life of the product.

[0076] Reference Figure 13 An adjusting screw 27 is threadedly connected to the inner side of the central connecting rod 8 and above the U-shaped groove 17. This allows for fine adjustment of the initial preload of the U-shaped spring 18 on the spindle 9 during installation or maintenance to adapt to different working conditions or compensate for manufacturing tolerances. It can also actively compensate for the gap caused by the lack of elasticity when the elasticity of the U-shaped spring 18 is not good.

[0077] The implementation principle of the single-pole double-throw type loaded radio frequency switch linkage synchronous switching structure in this application embodiment is as follows:

[0078] When the electromagnetic coil 12 is energized, it generates a magnetic force that attracts one end of the second channel switching plate 10, causing it to rotate around the switching plate pin 3. As the second channel switching plate 10 rotates, the end closer to the electromagnetic coil 12 rises, and the end farther from the electromagnetic coil 12 falls, driving the central connecting rod 8 to rotate. This causes the end closer to the second channel switching plate 10 to fall, and the end closer to the first channel switching plate 5 to rise, thereby causing the end of the first channel switching plate 5 closer to the second channel switching plate 10 to rise. This results in the first channel switching plate 5 and the second channel switching plate 10 rotating in the same direction, thus achieving the effect of simultaneously controlling two sets of channel switching plates through one set of channel switching electromagnetic coils.

[0079] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A single-pole double-throw type loaded radio frequency switch linkage synchronous switching structure, characterized in that, include: Fixed base (1); The first channel switching plate (5) and the second channel switching plate (10) are rotatably mounted on the fixed base (1) via the switching plate pin (3); Conductor spring (2) is located below both ends of the first channel switching plate (5) and the second channel switching plate (10). The conductor spring (2) passes through the base and is riveted with a spring top rod (4) for connecting or disconnecting the frequency channel from the load. The electromagnetic coil (12) and coil core (11) are only located above both ends of the second channel switching plate (10), and the coil core (11) is located inside the electromagnetic coil (12); The central connecting rod (8) is rotatably connected to the fixed base (1) via the connecting rod pin (6), and its two ends are respectively connected to the ends of the first channel switching plate (5) and the second channel switching plate (10), so that when the electromagnetic coil (12) is energized, the first channel switching plate (5) and the second channel switching plate (10) can rotate in the same direction; The central connecting rod (8) has U-shaped grooves (17) at both ends. The first channel switching plate (5) and the second channel switching plate (10) have movable grooves (16) on the inner side of the end near the central connecting rod (8). The movable groove (16) has a mandrel (9) pressed into the inner side. The central connecting rod (8) is connected to the mandrel (9) through the U-shaped groove (17) to form a connecting rod slider mechanism. An elastic preload mechanism is provided between the central connecting rod (8) and the spindle (9) to eliminate the fit clearance caused by long-term wear; The elastic pre-tightening mechanism is a U-shaped spring (18), which is embedded in the U-shaped groove (17) and matches it.

2. The single-pole double-throw type loaded radio frequency switch linkage synchronous switching structure according to claim 1, characterized in that, Nylon gaskets (7) are provided between the two sides of the central connecting rod (8) and the fixed base (1).

3. The single-pole double-throw type loaded radio frequency switch linkage synchronous switching structure according to claim 1, characterized in that, A heat dissipation channel (19) is provided on the inner side of the coil core (11).

4. The single-pole double-throw type loaded radio frequency switch linkage synchronous switching structure according to claim 3, characterized in that, The inner bottom of the coil core (11) is provided with a redundant holding magnetic ring (20) for providing holding force after the electromagnetic coil (12) is de-energized to prevent accidental switching. The inner side of the ring has a heat dissipation hole that matches the heat dissipation channel (19).

5. The single-pole double-throw type loaded radio frequency switch linkage synchronous switching structure according to claim 1, characterized in that, The mandrel (9) includes a shaft (21) press-fitted inside the movable groove (16) and a roller (22) rotatably connected to the outside of the shaft (21). The roller (22) is adapted to the U-shaped spring (18).

6. The single-pole double-throw type loaded radio frequency switch linkage synchronous switching structure according to claim 1, characterized in that, Two U-shaped spring pieces (18) are provided, which are respectively installed on both sides inside the U-shaped groove (17). A retaining strip (25) is provided on the outer side of the closed end of the U-shaped spring piece (18). The two sides inside the central connecting rod (8) are provided with retaining grooves (26) that are compatible with the retaining strip (25). The two U-shaped spring pieces (18) are fixed with a connecting buckle (23) at one end close to each other. The two connecting buckles (23) are fastened to each other. A disassembly groove (24) is provided on both sides of the bottom of the U-shaped groove (17) and below the U-shaped spring piece (18).

7. The single-pole double-throw type loaded radio frequency switch linkage synchronous switching structure according to claim 1, characterized in that, An adjusting screw (27) is threadedly connected to the inner side of the central connecting rod (8) and above the U-shaped groove (17).

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