Radio frequency switch assembly, radio frequency switch and assembly method

Abstract

The application provides a radio frequency switch assembly, a radio frequency switch and an assembling method thereof. The radio frequency switch assembly comprises a shell, a single electromagnetic driving part, a rebound assembly, a pressing part and a transmission part. The single electromagnetic driving part is arranged in the shell and has a magnetic attraction end. The rebound assembly comprises a compression spring and a tension spring. The compression spring and the tension spring are arranged in the shell in sequence along the axial direction of the single electromagnetic driving part and start from the magnetic attraction end. The pressing part is rotatably arranged in the shell and has pressing ends at both ends. The single electromagnetic driving part is arranged to cooperate with the compression spring and the tension spring arranged on both sides of the transmission part to realize bidirectional driving. The transmission part is arranged in parallel between the single electromagnetic driving part and the pressing part. The compression spring, the tension spring and the single electromagnetic driving part are coaxially arranged and form a compact layout in three rows with the transmission part and the pressing part, which is beneficial to the miniaturization and integration of the radio frequency switch.

Description

Technical Field

[0001] This invention relates to the field of radio frequency switch technology, specifically to a radio frequency switch assembly, a radio frequency switch, and an assembly method. Background Technology

[0002] Radio frequency (RF) switches are common devices in RF circuits, used to control the switching of RF signal channels. They are widely used in microwave communications, radar systems, phased arrays, electronic warfare, automatic test equipment, and many other fields. Based on their working principle, RF switches are mainly divided into two categories: solid-state RF switches and electromechanical RF switches. Solid-state RF switches use PIN diodes or field-effect transistors (FETs) as switching elements, offering advantages such as fast switching speed and long lifespan. However, they suffer from relatively high insertion loss and limited isolation in high-power applications. Electromechanical RF switches control the contact and separation of mechanical contacts through an electromagnetic drive mechanism to achieve signal switching. They offer advantages such as low insertion loss, high isolation, and good linearity, and are still widely used in applications requiring high reliability and high power handling capabilities.

[0003] In electromechanical radio frequency switches, to achieve single-pole double-throw (SPDT) or multi-throw functionality, existing technologies typically employ a dual-electromagnet drive structure to achieve a compact RF switch structure. For example, Chinese patent CN219350624U discloses a single-pole double-throw PCB-soldering coaxial RF switch, which selectively energizes the left or right electromagnet to drive an armature assembly to rotate clockwise or counterclockwise, thereby pushing the corresponding push rod assembly and ultimately achieving the switching of RF signals between different channels.

[0004] To achieve bidirectional drive, the current structural layout requires the integration of at least two complete electromagnet systems within the housing. These two electromagnet systems occupy independent layout space, limiting further reduction in the overall size of the RF switch. Summary of the Invention

[0005] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a radio frequency switch assembly accessory to solve the technical problem that the dual electromagnet drive structure in the prior art limits the further reduction of the overall size of the radio frequency switch.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a radio frequency switch assembly accessory, comprising: case; A single electromagnetic drive unit is disposed inside the housing, one end of which is a magnetic suction end; The springback assembly includes a compression spring and a tension spring, which are sequentially installed in the housing along the axial direction of the single electromagnetic drive element, starting from their magnetic ends. A pressing member, rotatably mounted within the housing, having pressing ends at both ends; and A transmission component is installed in parallel between the single electromagnetic drive component and the pressing component, and is provided with a magnetic attraction component connecting the compression spring and the tension spring; The transmission component has a first position and a second position. In the first position, the magnetic end of the single electromagnetic drive component is magnetically attracted to the magnetic attractor, and the transmission component drives the pressing component to flip and press down along one side to open the first channel. In the second position, the magnetic attractor disengages from the magnetic end, and the transmission component drives the pressing component to flip and press down along the other side to open the second channel.

[0007] In some embodiments, a limiting post is provided inside the housing, and the limiting post is built inside the tension spring; when the transmission member is in the second position, the transmission member abuts against the limiting post, and the tension spring is in a stretched state, and the compression spring is in a compressed state.

[0008] In some embodiments, the transmission member is L-shaped, having a vertical portion extending toward the spring-loaded assembly and a horizontal portion parallel to the axis of the single electromagnetic drive member, wherein the compression spring and the tension spring are respectively connected to both sides of the vertical portion; the magnetic attractor is connected to the side of the vertical portion near the magnetic attractor end of the single electromagnetic drive member and is housed inside the compression spring; a drive rod is provided at the bottom of the horizontal portion for driving the lower pressure member to flip.

[0009] In some embodiments, the pressing member includes a V-shaped block and a pressing plate. The V-shaped block is rotatably mounted inside the housing, and the two pressing plates are respectively connected to the two ends of the V-shaped block. A clearance groove is provided at the bottom of the horizontal section, and a portion of the V-shaped block is accommodated in the clearance groove. The driving rod is inserted into the V-groove of the V-shaped block. In the first position and the second position, it pushes against the inner walls of the two sides of the V-groove, causing the V-shaped block to rotate and switching the pressing of the two pressing plates.

[0010] In some embodiments, in the first position or the second position, the pressure plate on the non-pressure side abuts against the inner wall of the clearance groove.

[0011] In some embodiments, a guide component is further included, which is installed within the housing and slidably connected to the transmission member for guiding the sliding direction of the transmission member.

[0012] In some embodiments, the guide assembly includes a partition plate and a guide cylinder. The partition plate has a first guide hole, and the guide cylinder has a second guide hole. The vertical part of the transmission member is slidably connected to the second guide hole, and the horizontal part of the transmission member is slidably connected to the first guide hole.

[0013] In some embodiments, one side of the partition plate extends and connects to the inner wall of the housing; a portion of the transmission member at least partially overlaps with the partition plate along the sliding direction of the transmission member; the inner wall of the housing, the partition plate, and the transmission member form a U-shaped region, and the single electromagnetic drive member is arranged within the U-shaped region for electromagnetic shielding of the radio frequency region.

[0014] Secondly, the present invention also provides a radio frequency switch, including the radio frequency switch assembly as described in any of the above claims, and further including a radio frequency signal input interface, a radio frequency signal output interface, a first channel inner conductor sheet, and a second channel inner conductor sheet; the radio frequency signal input interface and the radio frequency signal output interface are disposed on the housing, and the first channel inner conductor sheet and the second channel inner conductor sheet are disposed inside the housing and respectively correspond to the two pressing ends of the pressing member.

[0015] Thirdly, the present invention also provides an assembly method for assembling radio frequency switch assembly components as described in any of the above claims, comprising the following steps: The compression spring and the tension spring are installed sequentially inside the housing; The transmission component is fixedly connected to the end of the compression spring, and the magnetic part of the transmission component is inserted into the inside of the compression spring; The tension spring is fixedly connected to the side of the transmission component away from the compression spring to form a transmission and rebound assembly; The transmission spring assembly is installed inside the housing; A single electromagnetic drive unit is installed inside the housing, with the magnetic end of the single electromagnetic drive unit facing the magnetic component. The pressing component is rotatably installed inside the housing, so that the pressing component and the transmission component are in transmission engagement.

[0016] Compared with existing technologies, the RF switch assembly provided by this invention achieves bidirectional drive by setting a single electromagnetic drive component, which works in conjunction with compression springs and tension springs placed on both sides of the transmission component. When power is off, the compression spring applies a pushing force to the transmission component, and the tension spring applies a pulling force to the transmission component. The two forces are in the same direction and work together, so that the reset driving force on the transmission component is the superposition of the two spring forces, thereby ensuring the reliability and response speed of power-off reset. At the same time, the impact of fatigue of a single spring on the overall performance is mutually offset, effectively extending the service life of the product. In addition, the transmission component is installed in parallel between the single electromagnetic drive component and the pressing component, and the compression springs and tension springs are arranged coaxially with the single electromagnetic drive component, forming a compact three-row layout with the transmission component and the pressing component, which is conducive to the miniaturization and integration of the RF switch. Attached Figure Description

[0017] Figure 1 This is an external structural diagram of the radio frequency switch and radio frequency switch assembly provided in the embodiments of the present invention; Figure 2 This is a cross-sectional view of the radio frequency switch assembly provided in an embodiment of the present invention. Figure 3 This is a three-dimensional structural diagram of the radio frequency switch assembly provided in an embodiment of the present invention; Figure 4 This is a cross-sectional view of the radio frequency switch and radio frequency switch assembly accessories provided in the embodiments of the present invention; Figure 5 This is a flowchart of the assembly method provided in an embodiment of the present invention.

[0018] Explanation of reference numerals in the attached figures: 1. Housing; 101. RF signal input interface; 102. RF signal output interface; 103. Inner conductor sheet of the first channel; 104. Inner conductor sheet of the second channel; 2. Single electromagnetic drive component; 3. Rebound assembly; 31. Compression spring; 32. Tension spring; 4. Pressing component; 41. V-block; 41a. V-groove; 42. Pressing plate; 5. Transmission component; 51. Vertical part; 52. Horizontal part; 53. Magnetic suction component; 54. Drive rod; 55. Clearance groove; 6. Limiting post; 7. Guide assembly; 71. Partition plate; 71a. First guide hole; 72. Guide cylinder; 72a. Second guide hole. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0020] To address the technical problems of existing RF switches, such as bulky structure, numerous parts, large space occupation, and high cost due to the use of dual electromagnets for driving, and insufficient reset reliability due to elastic fatigue caused by single-spring reset schemes, this invention provides an RF switch assembly that can achieve a compact layout with a single electromagnetic drive unit and dual springs working together. This simplifies the structure, saves parts, and ensures the stability and long-term reliability of bidirectional switching.

[0021] It should be noted that the RF switch assembly accessories described in this invention are used in, but not limited to, communication base stations, mobile terminals, radar systems, phased array antennas, automatic test equipment, etc. For ease of explanation, this invention only uses the application of RF switch assembly accessories in RF switches as an example for explanation. The principle of RF switch assembly accessories applied to other types of equipment is essentially the same as that applied to RF switches, and will not be described in detail here.

[0022] Please see Figure 1-4 This invention provides a radio frequency (RF) switch assembly accessory. The RF switch assembly accessory includes a housing 1, a single electromagnetic drive 2, a spring-loaded assembly 3, a pressing member 4, and a transmission member 5. The single electromagnetic drive 2 is disposed within the housing 1, with one end being a magnetic end. The spring-loaded assembly 3 includes a compression spring 31 and a tension spring 32, which are sequentially installed within the housing 1 along the axial direction of the single electromagnetic drive 2, starting from their magnetic ends. The compression spring 31 is closer to the magnetic end, and the tension spring 32 is further away from the magnetic end. The pressing member 4 is rotatably installed within the housing 1, with pressing ends at both ends. The transmission member 5 is installed parallel to the single electromagnetic drive 2 and the pressing member 4, and is provided with a magnetic 53 connecting the compression spring 31 and the tension spring 32.

[0023] In this embodiment, the transmission component 5 has a first position and a second position. In the first position, the magnetic end of the single electromagnetic drive component 2 is magnetically attracted to the magnetic accumulator 53, and the transmission component 5 drives the pressing component 4 to flip and press down along one side to open the first channel. In the second position, the magnetic accumulator 53 disengages from the magnetic end, and the transmission component 5 drives the pressing component 4 to flip and press down along the other side to open the second channel. In this way, by using a single electromagnetic drive component in conjunction with the synergistic effect of the compression spring 31 and the tension spring 32, the switching between two channels can be achieved. Compared with the existing technology that uses a dual electromagnet drive, this significantly reduces the number of parts, simplifies the structure, reduces the space occupied, and lowers the cost. At the same time, since the compression spring 31 and the tension spring 32 are placed on opposite sides of the transmission component 5, when the power is off, they both apply the same driving force to the transmission component 5. The compression spring 31 pushes to the right and the tension spring 32 pulls to the right, achieving bidirectional force balance. The impact of fatigue of a single spring on the overall performance is mutually offset, improving the reliability of long-term use.

[0024] It should be noted that a single electromagnetic drive unit refers to setting only one electromagnetic drive unit, i.e., one electromagnet, to achieve dual-channel switching drive, thereby simplifying the existing technology that uses two electromagnets to drive two channels separately.

[0025] It is understandable that the axial direction of the single electromagnetic drive 2 refers to the direction of the central axis of the iron core of the single electromagnetic drive 2. The compression spring 31 and the tension spring 32 are arranged along this axial direction, so that the compression spring 31 and the tension spring 32 are basically coaxial with the iron core of the single electromagnetic drive 2, thereby ensuring that the direction of the spring force is consistent with the direction of movement of the transmission component 5 and avoiding the generation of additional torque.

[0026] It is understandable that the first position and the second position are the two extreme positions of the transmission component 5 during its movement stroke. The first position is when the transmission component 5 is magnetically attracted to the magnetic end closest to the single electromagnetic drive component 2, and the second position is when the transmission component 5 moves to the magnetic end furthest from the single electromagnetic drive component 2 under the action of spring force. The transmission component 5 reciprocates between these two positions to achieve channel switching.

[0027] In one embodiment, please refer to Figure 2 , Figure 3 and Figure 4 , Figure 2 This is a schematic diagram illustrating the cooperative relationship between the transmission component and the rebound assembly in one embodiment of the present invention. A limiting post 6 is provided inside the housing 1, and the limiting post 6 is housed within the tension spring 32. When the transmission component 5 is in the second position, the vertical part 51 abuts against the limiting post 6, causing the tension spring 32 to be in a stretched state and the compression spring 31 to be in a compressed state.

[0028] In this embodiment, the limiting post 6 passes through the tension spring 32, serving two purposes: firstly, it guides the tension spring 32, preventing radial displacement or instability during extension and retraction; secondly, it acts as a mechanical limit for the transmission component 5 in the second position. When the transmission component 5 moves to the second position, it abuts against the end of the limiting post 6, achieving precise control of the transmission component 5's stroke. At this time, the compression spring 31 is in a compressed state, and the tension spring 32 is in a stretched state, applying pushing and pulling forces to the transmission component 5 respectively, thus stably maintaining the transmission component 5 in the second position.

[0029] Understandably, the position and length of the limiting post 6 can be adaptively designed according to the required stroke. The position where the end of the limiting post 6 abuts against the vertical part 51 determines the stopping point of the transmission member 5 in the second position. Therefore, by adjusting the length or installation position of the limiting post 6, the stroke of the transmission member 5 can be precisely controlled. The limiting post 6 is preferably made of metal to ensure sufficient rigidity and wear resistance.

[0030] It should be noted that, in this invention, the compression spring 31 and the tension spring 32 are preferably made of non-ferromagnetic materials. Specifically, both the compression spring 31 and the tension spring 32 are made of non-magnetic or weakly magnetic stainless steel, such as SUS304 austenitic stainless steel, or copper alloy materials, such as beryllium bronze or phosphor bronze. Using non-ferromagnetic materials fundamentally avoids the problem of spring magnetization, ensuring that the magnetic lines of force generated at the magnetic suction end when the single electromagnetic drive 2 is energized can form a closed magnetic circuit through the magnetic suction component, thereby guaranteeing reliable adsorption of the transmission component 5. Simultaneously, the non-ferromagnetic spring also avoids uncontrollable additional forces caused by spring magnetization, ensuring the stability of the movement of the transmission component 5 and the reliability of switching. Those skilled in the art can also use a non-magnetic coating to weaken the effect of magnetization on the surface of the ferromagnetic spring, but coating has the risks of complex processes, easy wear and peeling, and cannot completely eliminate the shunting effect on the magnetic circuit after the spring body is magnetized. Therefore, directly using a non-ferromagnetic material as the spring material is the preferred solution of this invention. The explanation regarding the use of non-ferromagnetic materials for compression spring 31 and tension spring 32 also applies to other elastic elements that may be used in this invention. That is, all elastic elements located within the magnetic field influence range of the single electromagnetic drive 2 are preferably made of non-ferromagnetic materials to avoid interference with the magnetic circuit.

[0031] In one embodiment, please refer to Figure 2 , Figure 3 and Figure 4 The transmission component 5 is L-shaped, having a vertical portion 51 extending toward the spring-loaded assembly 3 and a horizontal portion 52 parallel to the axis of the single electromagnetic drive component 2. A compression spring 31 and a tension spring 32 are respectively connected to both sides of the vertical portion 51. A magnetic attractor is connected to the side of the vertical portion 51 near the magnetic attractor end of the single electromagnetic drive component 2 and is housed inside the compression spring 31. A drive rod 54 is provided at the bottom of the horizontal portion 52 for driving the lower pressure component 4 to flip.

[0032] In this embodiment, the transmission component 5 adopts an L-shaped structure design. The vertical part 51 serves as the main body connected to the rebound assembly 3, with compression spring 31 and tension spring 32 connected to its two sides respectively. This ensures that the forces exerted by the two springs on the transmission component 5 are applied along the same axial direction, avoiding the generation of additional torque and guaranteeing the linearity and smoothness of the movement of the transmission component 5. The horizontal part 52 extends parallel to the axial direction of the single electromagnetic drive component 2, and the drive rod 54 at its bottom is used to drive the lower pressure component 4 to flip. The magnetic suction component is housed inside the compression spring 31, making the overall structure more compact and shortening the magnetic circuit length, thereby improving the magnetic suction efficiency.

[0033] It should be noted that the magnetic attractor refers to a block or sheet-like component made of a magnetically conductive material, such as pure iron, electrical pure iron, or low-carbon steel, which can be attracted by the magnetic force generated by the magnetic attractor end of the single electromagnetic drive component 2. The magnetic attractor can be an independent part fixed to the vertical part 51 by welding, riveting, threaded connection, etc., or it can be a protruding structure integrally formed with the vertical part 51, as long as it can be attracted by magnetic force and drive the transmission component 5 to move. The shape of the magnetic attractor is preferably cylindrical or square, so as to be accommodated inside the compression spring 31.

[0034] It is understandable that the magnetic attractor being housed inside the compression spring 31 means that the magnetic attractor at least partially extends into the internal space of the compression spring 31, rather than merely being located on the outer side of the end of the compression spring 31. This built-in design brings the magnetic attractor closer to the magnetic end of the single electromagnetic drive 2, shortening the magnetic circuit length and reducing magnetic resistance, thereby achieving a greater magnetic attraction force under the same electromagnetic driving force. Simultaneously, the compression spring 31, sleeved on the outer side of the magnetic attractor, has a guiding effect on the movement of the magnetic attractor due to its coiled structure.

[0035] In one embodiment, please refer to Figure 2 , Figure 3 and Figure 4 The pressing component 4 includes a V-shaped block 41 and two pressing plates 42. The V-shaped block 41 is rotatably mounted inside the housing 1, and the two pressing plates 42 are respectively connected to the two ends of the V-shaped block 41. A clearance groove 55 is provided at the bottom of the horizontal part 52, and part of the V-shaped block 41 is accommodated in the clearance groove 55. The driving rod 54 is inserted into the V-groove 41a of the V-shaped block 41. In the first position and the second position, it pushes against the inner walls of the two sides of the V-groove 41a, causing the V-shaped block 41 to rotate and switching the pressing of the two pressing plates 42. The V-shaped block 41 is rotatably mounted inside the housing 1 via a rotating shaft, and the pressing plates 42 at both ends correspond to the conductor sheet 103 in the first channel and the conductor sheet 104 in the second channel, respectively. The drive rod 54 is inserted into the V-groove 41a. When the transmission component 5 moves axially, the drive rod 54 pushes against the inner wall of one side of the V-groove 41a, causing the V-block 41 to flip around its axis of rotation. This causes the lower pressure plate 42 on the corresponding side to press down onto the corresponding inner conductor sheet, thus opening the channel. When the transmission component 5 moves in the opposite direction, the drive rod 54 pushes against the inner wall of the other side of the V-groove 41a, causing the V-block 41 to flip to the other side, switching to another channel. This method of converting linear motion into flipping motion through the cooperation of the drive rod 54 and the V-groove 41a results in a short transmission chain, fast response speed, and small cumulative tolerance, which is beneficial for improving switching accuracy and reliability.

[0036] It should be noted that the V-block refers to a block-shaped component with a roughly V-shaped cross-section. A V-groove 41a is provided in the middle of the V-block, and the two inner walls of the V-groove 41a are set at an included angle for engagement with the drive rod 54. The drive rod 54 is inserted into the V-groove 41a. When the drive rod 54 moves along the length of the V-groove 41a, i.e., the direction of movement of the transmission component 5, the drive rod 54 contacts one of the inner walls of the V-groove 41a and applies a thrust, causing the V-block 41 to rotate around its axis.

[0037] It is understandable that the included angle between the two inner walls of the V-groove 41a determines the rotation angle of the V-block 41 corresponding to the movement of the drive rod 54 a unit distance. A smaller included angle results in a larger transmission ratio, meaning that a smaller displacement of the drive rod 54 can produce a larger rotation angle in the V-block 41, which is beneficial for improving response speed. Conversely, a larger included angle results in a smaller transmission ratio, leading to smoother rotation of the V-block 41. The specific value of the included angle can be designed according to actual needs, with a preferred range of 60° to 120°.

[0038] It is understandable that the connection between the lower pressure plate 42 and the two ends of the V-block 41 can be a fixed connection, such as integral molding, welding, or bolt connection, or it can be a hinged connection. When the lower pressure plate 42 and the V-block 41 are hinged, even if there is a slight deviation in the flipping angle of the V-block 41, the lower pressure plate 42 can still automatically adjust its pressing angle to ensure good contact with the inner conductor sheet. This hinged connection method can improve the reliability of contact and reduce the requirements for the machining accuracy of each part.

[0039] In one embodiment, a clearance groove 55 is formed at the bottom of the horizontal portion 52, and a portion of the V-shaped block 41 is accommodated within the clearance groove 55. By providing the clearance groove 55, on the one hand, clearance space is provided for the V-shaped block 41, allowing the V-shaped block 41 to be arranged compactly upwards, reducing the overall height of the housing 1; on the other hand, the clearance groove 55 also has an auxiliary limiting function.

[0040] Specifically, in the first or second position, the non-pressing side of the lower pressure plate 42 abuts against the inner wall of the clearance groove 55. That is, when the first side lower pressure plate 42 presses down onto the first channel inner conductor sheet 103, the second side lower pressure plate 42 abuts against the inner wall of the clearance groove 55; when the second side lower pressure plate 42 presses down onto the second channel inner conductor sheet 104, the first side lower pressure plate 42 abuts against the inner wall of the clearance groove 55. This structure provides auxiliary positioning for the flipping angle of the lower pressure member 4, further ensuring the positional accuracy of the lower pressure member 4 when switched to the correct position. Together with the limiting post 6, it forms a double limiting mechanism, improving the repeatability and long-term reliability of the switch switching.

[0041] It should be noted that the non-pressing side pressure plate refers to the pressure plate 42 that is not pressing down on the inner conductor sheet in the current state. Since the two pressure plates 42 are fixed to both ends of the V-block 41 respectively, when the V-block 41 flips to one side, one end of the pressure plate 42 moves downward, i.e., the pressing side, while the other end of the pressure plate 42 moves upward, i.e., the non-pressing side. When the non-pressing side pressure plate 42 moves upward and abuts against the inner wall of the clearance groove 55, it is stopped, thereby preventing the V-block 41 from continuing to flip, achieving auxiliary limiting.

[0042] It is understood that the inner wall of the clearance groove 55 refers to the top or side wall of the clearance groove 55, and its contact position with the lower pressure plate 42 determines the maximum flipping angle of the V-block 41. Therefore, by designing the depth and width of the clearance groove 55, the stroke of the lower pressure plate 42 can be precisely controlled, ensuring that the lower pressure plate 42 has appropriate contact pressure with the inner conductor sheet when in the conductive state, neither too high nor too low, thus preventing permanent deformation of the inner conductor sheet and ensuring contact reliability.

[0043] The first channel inner conductor sheet 103 and the second channel inner conductor sheet 104 are both composed of a pressure rod and a spring to form a rebound structure. That is, the housing 1 is equipped with a spring, the head of the pressure rod presses against the top of the spring, and the bottom of the pressure rod is connected to the inner conductor sheet 103. The lower pressure plate 42 presses down the pressure rod head corresponding to the inner conductor sheet 103, causing it to move down and compress the spring. Thus, when the pressure is lost, it bounces back and pulls up the inner conductor sheet.

[0044] In one embodiment, please refer to Figure 2 , Figure 3 and Figure 4 The RF switch assembly also includes a guide component 7, which is installed inside the housing 1 and slidably connected to the transmission component 5 to guide the sliding direction of the transmission component 5. Specifically, by setting the guide component 7, the reciprocating motion of the transmission component 5 is precisely guided, preventing the transmission component 5 from deviating, tilting, or jamming during movement, ensuring that the transmission component 5 always moves along a predetermined straight trajectory, thereby ensuring the matching accuracy between the drive rod 54 and the V-groove 41a, and improving the reliability and consistency of switching.

[0045] Furthermore, the guide assembly 7 includes a partition plate 71 and a guide cylinder 72. The partition plate 71 has a first guide hole 71a, and the guide cylinder 72 has a second guide hole 72a. The guide cylinder 72 is a semi-cylindrical shape, facilitating the internal installation of compression and tension springs and providing telescopic guidance. The vertical portion 51 of the transmission member 5 is slidably connected to the second guide hole 72a, and the horizontal portion 52 of the transmission member 5 is slidably connected to the first guide hole 71a.

[0046] In this embodiment, the vertical portion 51 of the transmission component 5 passes through and slides in the second guide hole 72a, while the horizontal portion 52 passes through and slides in the first guide hole 71a. The transmission component 5 is guided at two points by the two spaced-apart guide holes, effectively constraining its posture during movement, preventing deflection, and ensuring the straightness and accuracy of the transmission component 5's movement.

[0047] It should be noted that a sliding connection refers to a connection method in which two components can slide relative to each other. Specific implementations include, but are not limited to, clearance fits between shafts and holes, fits between sliders and guide rails, and sliding fits achieved through linear bearings. In this embodiment, the vertical portion 51 of the transmission component 5 and the second guide hole 72a, as well as the horizontal portion 52 and the first guide hole 71a, are all slidingly connected by clearance fits. That is, the diameter of the guide hole is slightly larger than the cross-sectional dimension of the corresponding part of the transmission component, allowing the transmission component 5 to slide smoothly along the axial direction without jamming.

[0048] Understandably, the shapes of the first guide hole 71a and the second guide hole 72a should match the cross-sectional shapes of the horizontal portion 52 and the vertical portion 51 of the transmission member 5. For example, when the cross-section of the horizontal portion 52 is circular, the first guide hole 71a is a circular hole; when the cross-section of the horizontal portion 52 is square, the first guide hole 71a is a square hole. The cross-sectional shape of the guide hole is not limited to circular or square; it can also be polygonal or other irregular shapes, as long as it can form a sliding fit with the transmission member 5.

[0049] In one embodiment, one side of the partition plate 71 extends and connects to the inner wall of the housing 1. A portion of the transmission member 5 at least partially overlaps with the partition plate 71 along the sliding direction of the transmission member 5. The inner wall of the housing 1, the partition plate 71, and the transmission member 5 form a U-shaped region, and a single electromagnetic drive member 2 is arranged within the U-shaped region for electromagnetic shielding of the radio frequency region.

[0050] In this embodiment, the partition plate 71 can be made of conductive material, with one side fixedly connected to the inner wall of the housing 1 and electrically connected to the housing 1. Since the transmission member 5 always maintains at least partial overlap with the partition plate 71 during sliding, the U-shaped region remains continuous and intact throughout the entire stroke of the transmission member 5. This forms a continuous and effective electromagnetic shielding barrier between the single electromagnetic drive member 2, the pressing member 4, and the radio frequency signal transmission area, avoiding shielding gaps caused by the movement of the transmission member 5 and ensuring the isolation and signal transmission stability of the radio frequency switch throughout its entire stroke range. Simultaneously, the transmission member 5 is reused as a movable wall of the U-shaped region, eliminating the need for additional independent shielding components, further simplifying the structure and saving space within the housing 1.

[0051] It should be noted that the U-shaped region refers to a spatial region with a roughly U-shaped cross-section, which is enclosed by the inner wall of the housing 1, the partition plate 71, and the transmission component 5, rather than referring to a specific component having a U-shaped shape. The three sides of this U-shaped region, the inner wall of the housing 1, the partition plate 71, and the transmission component 5 together form a semi-enclosed shielded cavity. The single electromagnetic drive component 2 is located inside this cavity, while the radio frequency signal transmission area is located outside the cavity.

[0052] Understandably, in order to achieve electromagnetic shielding, both the partition plate 71 and the housing 1 should be made of conductive material and electrically connected to each other, so that the U-shaped region forms a grounded conductive barrier. The transmission member 5, as the movable part of the U-shaped region, is also preferably made of a non-ferromagnetic conductive metal material, or at least has a conductive surface on the side facing the single electromagnetic drive member 2, to ensure the continuity of shielding.

[0053] It is understandable that the fact that a portion of the transmission component 5 at least partially overlaps with the partition plate 71 along the sliding direction of the transmission component 5 means that throughout the entire stroke of the transmission component 5, from the first position to the second position, there is always an overlapping area between the transmission component 5 and the partition plate 71 in the axial direction, and there is no situation where they are completely misaligned. This dynamic overlap ensures that the U-shaped area remains closed during the movement of the transmission component 5, and there will be no opening due to the movement of the transmission component 5. The amount of overlap can be designed according to the stroke of the transmission component 5 and the shielding requirements. Preferably, the overlap amount should not be less than 20% of the stroke of the transmission component 5 to ensure sufficient shielding redundancy.

[0054] To better understand this invention, the following is combined with... Figures 2 to 4 The technical solution of the present invention will be described in detail below.

[0055] The core feature of the RF switch assembly accessory provided by this invention lies in its compact layout of three columns arranged side-by-side; for details, please refer to... Figure 2 , Figure 3 and Figure 4 The single electromagnetic drive unit 2 and the rebound assembly 3 are arranged sequentially along the same axis to form the first column, the drive source column; the transmission unit 5 is arranged parallel to the axis on the side of the single electromagnetic drive unit 2 to form the second column, the transmission column; the pressing unit 4 is arranged perpendicular to the axis on the side of the transmission unit 5 to form the third column, the transposition column; the three columns are arranged side by side in the housing 1, and each column does not overlap or interfere with the others, avoiding the increase in thickness caused by multi-layer stacking and realizing a highly compact overall structure.

[0056] It should be noted that "three rows side by side" means that the three functional groups are arranged approximately side by side on the projection plane within the housing 1, that is, they are arranged sequentially along the width direction of the housing 1, rather than stacked along the height direction. This layout helps to reduce the overall height of the housing 1, making the structure more flat and facilitating installation and use in space-constrained equipment.

[0057] It is understandable that the division into three columns is for the convenience of describing the spatial relationship between the components, and does not mean that the columns are physically isolated from each other. For example, the magnetic suction element 53 on the transmission component 5 extends from the second column to the first column, and the drive rod 54 extends from the second column to the third column to cooperate with the pressing element 4. The transmission component 5 is used to transmit motion and force between the columns. Therefore, the three columns should be understood as functional partitions, not physical separations.

[0058] In terms of working principle, when the single electromagnetic drive 2 is energized, its magnetic end generates magnetic force, attracting the magnetic suction member 53 located inside the compression spring 31, driving the transmission member 5 to move closer to the single electromagnetic drive 2, i.e., to the first position. At this time, the compression spring 31 is further compressed, and the tension spring 32 is further stretched, both storing elastic potential energy. Simultaneously, the drive rod 54 at the bottom of the horizontal part 52 of the transmission member 5 moves within the V-groove 41a, pushing against the inner wall of one side of the V-groove 41a, causing the V-shaped block 41 to rotate around its axis to the first side. The lower pressure plate 42 on the first side presses down onto the inner conductor sheet 103 of the first channel, making the radio frequency signal input interface 101 connected to the inner conductor sheet 103 of the first channel, thus realizing the conduction of the first channel.

[0059] It should be noted that "energizing" refers to applying current to the coil of the single electromagnetic drive unit 2, causing its iron core to generate an electromagnetic field. "De-energizing" refers to cutting off the current supply to the single electromagnetic drive unit 2, causing its electromagnetic field to disappear. The power supply method for the single electromagnetic drive unit 2 can be DC power or pulse power; the specific power supply method does not affect the implementation of this invention.

[0060] Understandably, in the first position, both compression spring 31 and tension spring 32 are in an energy-storing state; compression spring 31 is compressed, and tension spring 32 is stretched. When the single electromagnetic drive component 2 is de-energized, both springs simultaneously release their stored elastic potential energy, jointly propelling the transmission component 5 to the second position. This dual-spring energy storage and simultaneous release ensures that the driving force on the transmission component 5 when de-energized is the superposition of the two spring forces, far exceeding the driving force of a single spring, thus guaranteeing the reliability and response speed of the power-off reset.

[0061] When the single electromagnetic drive 2 is de-energized, the magnetic attraction disappears, and the elastic potential energy stored in the compression spring 31 and the tension spring 32 is released. The compression spring 31 applies a pushing force to the transmission component 5, and the tension spring 32 applies a pulling force to the transmission component 5. Together, they drive the transmission component 5 to move away from the single electromagnetic drive 2, i.e., to the second position. The transmission component 5 stops when it moves to the point where the vertical part 51 abuts against the limiting post 6, achieving precise positioning. At the same time, the drive rod 54 moves in the opposite direction within the V-groove 41a, pushing against the inner wall of the other side of the V-groove 41a, causing the V-block 41 to flip to the second side. The lower pressure plate 42 on the second side presses down onto the inner conductor sheet 104 of the second channel, making the radio frequency signal input interface 101 connected to the inner conductor sheet 104 of the second channel, thus achieving the conduction of the second channel.

[0062] During the above process, when the transmission component 5 is in the second position, the limiting post 6 abuts against the vertical part 51, achieving the first level of limiting; at the same time, the lower pressure plate 42 on the non-pressing side abuts against the inner wall of the clearance groove 55, achieving the second level of limiting. The dual limiting structures work together to ensure the positional accuracy of the transmission component 5 and the lower pressure component 4 when switched to the correct position.

[0063] It is understandable that the first and second limit switches are two independent limit structures, which respectively limit the transmission component 5 and the pressing component 4. Even if the accuracy of one limit structure decreases due to wear or failure, the other limit structure can still ensure basic positioning accuracy, thereby improving the long-term reliability of the switch.

[0064] Regarding electromagnetic shielding, one side of the partition plate 71 is fixedly connected to the inner wall of the housing 1. The inner wall of the housing 1, the partition plate 71, and the transmission component 5 together form a U-shaped area, in which the single electromagnetic drive component 2 is arranged. Since the transmission component 5 always maintains at least partial overlap with the partition plate 71 during sliding, the U-shaped area remains continuous and intact throughout the entire stroke of the transmission component 5, thereby forming a continuous and effective electromagnetic shield between the single electromagnetic drive component 2 and the radio frequency signal transmission area, ensuring the isolation of the radio frequency switch throughout its entire stroke range.

[0065] It should be noted that the radio frequency (RF) region refers to the area within the housing 1 used for transmitting RF signals, mainly including the space containing the pressing component 4, the inner conductor sheet 103 of the first channel, the inner conductor sheet 104 of the second channel, and the RF signal input interface 101 and the RF signal output interface 102. Since RF signals are highly sensitive to electromagnetic interference, isolating the electromagnetic interference source of the single electromagnetic drive component 2 from the RF region through a U-shaped area helps improve the signal quality of the RF switch.

[0066] Understandably, in addition to its electromagnetic shielding function, the partition plate 71 also serves as part of the guide assembly 7. Specifically, the partition plate 71 with the first guide hole 71a functions as both a shielding plate and a guide plate. This multifunctional integrated design further reduces the number of parts, contributing to structural compactness and cost reduction.

[0067] In one embodiment, the present invention also provides a radio frequency switch. See also... Figure 1 , Figure 2 and Figure 4 The RF switch includes the RF switch assembly described above, and also includes an RF signal input interface 101, an RF signal output interface 102, a first channel inner conductor sheet 103, and a second channel inner conductor sheet 104. The RF signal input interface 101 and the RF signal output interface 102 are disposed on the housing 1, and the first channel inner conductor sheet 103 and the second channel inner conductor sheet 104 are disposed inside the housing 1 and correspond to the two pressing ends of the pressing member 4, respectively.

[0068] In this embodiment, the RF signal input interface 101 is the common input terminal of the entire RF switch, and the RF signal output interface 102 includes a first RF signal output interface and a second RF signal output interface, corresponding to the output terminals of the first channel and the second channel, respectively. A first channel inner conductor sheet 103 is disposed between the RF signal input interface 101 and the first RF signal output interface, and a second channel inner conductor sheet 104 is disposed between the RF signal input interface 101 and the second RF signal output interface. When the first side pressing end of the pressing member 4 presses down on the first channel inner conductor sheet 103, the first channel inner conductor sheet 103 makes contact with the inner conductor cores of the contact connectors at both ends, thus connecting the RF signal input interface 101 and the first RF signal output interface, achieving signal transmission of the first channel. When the second side pressing end of the pressing member 4 presses down on the second channel inner conductor sheet 104, the second channel inner conductor sheet 104 makes contact with the inner conductor cores of the contact connectors at both ends, thus connecting the RF signal input interface 101 and the second RF signal output interface, achieving signal transmission of the second channel.

[0069] It should be noted that the contact connector refers to a conductive terminal or conductive post fixedly disposed within the housing 1, with its inner end opposite to the inner conductor sheet and its outer end electrically connected to the RF signal input interface 101 or the RF signal output interface 102. When the pressing plate 42 presses the inner conductor sheet downwards, the inner conductor sheet contacts the inner ends of the contact connectors at both ends, thereby achieving circuit conduction. The specific structure of the contact connector is well-known in the art and will not be described in detail here.

[0070] It is understood that the first inner conductor sheet 103 and the second inner conductor sheet 104 are preferably elastic metal springs. When the pressure plate 42 applies pressure, the springs undergo elastic deformation and come into close contact with the contact connector; when the pressure plate 42 releases pressure, the springs return to their original shape due to their elasticity and separate from the contact connector. This elastic contact method helps to ensure the reliability and consistency of the contact.

[0071] In one embodiment, the present invention also provides a method for assembling an RF switch assembly, for assembling the RF switch assembly as described above. Please refer to... Figure 5 The assembly method includes the following steps: S1. The compression spring 31 and the tension spring 32 are sequentially installed inside the housing 1. Specifically, the compression spring 31 is installed on the side of the housing 1 near the installation position of the single electromagnetic drive 2, and the tension spring 32 is installed on the side away from the installation position of the single electromagnetic drive 2, and the compression spring 31 and the tension spring 32 are arranged along the same axis.

[0072] S2. Fix the transmission component 5 to the end of the compression spring 31, and insert the magnetic suction component 53 of the transmission component 5 into the interior of the compression spring 31. Specifically, the vertical part 51 of the transmission component 5 can be fixedly connected to the end of the compression spring 31 by welding, riveting or snap-fitting, and the magnetic suction component can be inserted into the interior of the compression spring 31.

[0073] S3. The tension spring 32 is fixedly connected to the side of the transmission member 5 away from the compression spring 31 to form a transmission and rebound assembly. Specifically, one end of the tension spring 32 is fixedly connected to the side of the vertical part 51 of the transmission member 5 away from the compression spring 31, so that the compression spring 31, the transmission member 5 and the tension spring 32 are arranged sequentially along the same axis.

[0074] S4. Install the transmission and rebound assembly into the housing 1. Specifically, install the entire assembly into the housing 1, so that the limiting post 6 passes through the interior of the tension spring 32.

[0075] S5. Install the single electromagnetic drive 2 inside the housing 1, so that the magnetic end of the single electromagnetic drive 2 faces the magnetic attractor. Specifically, embed the single electromagnetic drive 2 into the housing 1, so that its magnetic end is directly opposite the magnetic attractor and separated by a preset distance. This preset distance is the stroke of the transmission member 5 from the second position to the first position.

[0076] S6. Rotate the pressing member 4 into the housing 1 so that the pressing member 4 and the transmission member 5 are in transmission engagement. Specifically, rotate the V-shaped block 41 into the housing 1 via a rotating shaft so that the drive rod 54 at the bottom of the horizontal part 52 of the transmission member 5 is inserted into the V-shaped groove 41a, and make the two pressing plates 42 correspond to the positions of the conductor sheet 103 in the first channel and the conductor sheet 104 in the second channel, respectively.

[0077] It should be noted that in the above assembly steps, a fixed connection refers to a connection method where the relationship between two components is fixed and there is no relative movement. Specific implementation methods include, but are not limited to, welding, bonding, riveting, threaded connections, and snap-fit ​​connections. In this embodiment, welding is preferably used to fix the spring and transmission component 5 to ensure the strength and reliability of the connection. However, welding is not the only connection method. In other embodiments, riveting or snap-fitting can also be used to achieve a fixed connection, as long as it ensures that the spring and transmission component 5 do not detach under normal operating conditions.

[0078] Understandably, pre-assembling the transmission component 5 with the compression spring 31 and the tension spring 32 into a transmission and rebound assembly before installing the whole assembly into the housing 1 is beneficial to improving assembly efficiency and accuracy. In the assembled state, the compression spring 31, the transmission component 5, and the tension spring 32 are arranged along the same axis, and their relative positions are fixed. After installation into the housing 1, no further adjustments are needed, simplifying the assembly process.

[0079] In one embodiment, the assembly method further includes: installing the partition plate 71 and the guide cylinder 72 inside the housing 1, so that the vertical part 51 of the transmission member 5 passes through the second guide hole 72a of the guide cylinder 72 and is slidably connected thereto, and so that the horizontal part 52 of the transmission member 5 passes through the first guide hole 71a of the partition plate 71 and is slidably connected thereto.

[0080] In one embodiment, the assembly method further includes: mounting the radio frequency signal input interface 101, the radio frequency signal output interface 102, the first channel inner conductor sheet 103 and the second channel inner conductor sheet 104 onto the housing 1, and making the first channel inner conductor sheet 103 and the second channel inner conductor sheet 104 correspond to the two lower pressure plates 42 respectively.

[0081] In the above assembly method, the order of each step can be adjusted according to actual operational needs. For example, the single electromagnetic drive component 2 can be installed in the housing 1 first, and then the transmission and spring assembly can be installed; or the pressing component 4 can be installed in the housing 1 first, and then the transmission and spring assembly can be installed. The adjustment of the above order does not affect the final assembly result and is within the protection scope of this invention.

[0082] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A radio frequency switch assembly accessory, characterized in that, include: case; A single electromagnetic drive unit is disposed inside the housing, one end of which is a magnetic suction end; The springback assembly includes a compression spring and a tension spring, which are sequentially installed in the housing along the axial direction of the single electromagnetic drive element, starting from their magnetic ends. A pressing member, rotatably mounted within the housing, having pressing ends at both ends; and A transmission component is installed in parallel between the single electromagnetic drive component and the pressing component, and is provided with a magnetic attraction component connecting the compression spring and the tension spring; The transmission component has a first position and a second position. In the first position, the magnetic end of the single electromagnetic drive component is magnetically attracted to the magnetic attractor, and the transmission component drives the pressing component to flip and press down along one side to open the first channel. In the second position, the magnetic attractor disengages from the magnetic end, and the transmission component drives the pressing component to flip and press down along the other side to open the second channel.

2. The RF switch assembly accessory according to claim 1, characterized in that, The housing is provided with a limiting post, which is built into the inner side of the tension spring; when the transmission member is in the second position, the transmission member abuts against the limiting post, and the tension spring is in a stretched state, while the compression spring is in a compressed state.

3. The RF switch assembly accessory according to claim 1, characterized in that, The transmission component is L-shaped, having a vertical portion extending toward the rebound assembly and a horizontal portion parallel to the axis of the single electromagnetic drive component. The compression spring and the tension spring are respectively connected to both sides of the vertical portion. The magnetic suction component is connected to the side of the vertical portion near the magnetic suction end of the single electromagnetic drive component and is housed inside the compression spring. A drive rod is provided at the bottom of the horizontal portion for driving the lower pressure component to flip.

4. The RF switch assembly accessory according to claim 3, characterized in that, The pressing component includes a V-shaped block and a pressing plate. The V-shaped block is rotatably mounted inside the housing, and the two pressing plates are respectively connected to the two ends of the V-shaped block. A clearance groove is provided at the bottom of the horizontal section, and part of the V-shaped block is accommodated in the clearance groove. The driving rod is inserted into the V-shaped groove of the V-shaped block. In the first position and the second position, it pushes against the inner walls of the two sides of the V-shaped groove, causing the V-shaped block to rotate and switching the pressing of the two pressing plates.

5. The RF switch assembly accessory according to claim 4, characterized in that, In the first or second position, the pressure plate on the non-pressure side abuts against the inner wall of the clearance groove.

6. The RF switch assembly accessory according to claim 3, characterized in that, It also includes a guide assembly, which is installed inside the housing and slidably connected to the transmission component to guide the sliding direction of the transmission component.

7. The RF switch assembly accessory according to claim 6, characterized in that, The guiding assembly includes a partition plate and a guide cylinder. The partition plate has a first guide hole, and the guide cylinder has a second guide hole. The vertical part of the transmission member is slidably connected to the second guide hole, and the horizontal part of the transmission member is slidably connected to the first guide hole.

8. The RF switch assembly accessory according to claim 7, characterized in that, One side of the partition plate extends and connects to the inner wall of the housing; a portion of the transmission member at least partially overlaps with the partition plate along the sliding direction of the transmission member; The inner wall of the housing, the partition plate, and the transmission component form a U-shaped region. The single electromagnetic drive component is arranged within the U-shaped region for electromagnetic shielding of the radio frequency region.

9. A radio frequency switch, characterized in that, The RF switch assembly as described in any one of claims 1-8 further includes an RF signal input interface, an RF signal output interface, a first channel inner conductor sheet, and a second channel inner conductor sheet; the RF signal input interface and the RF signal output interface are disposed on the housing, and the first channel inner conductor sheet and the second channel inner conductor sheet are disposed inside the housing and correspond to the two pressing ends of the pressing member, respectively.

10. An assembly method, characterized in that, The assembly of the RF switch assembly as described in any one of claims 1-8 includes the following steps: The compression spring and the tension spring are installed sequentially inside the housing; The transmission component is fixedly connected to the end of the compression spring, and the magnetic part of the transmission component is inserted into the inside of the compression spring; The tension spring is fixedly connected to the side of the transmission component away from the compression spring to form a transmission and rebound assembly; The transmission spring assembly is installed inside the housing; A single electromagnetic drive unit is installed inside the housing, with the magnetic end of the single electromagnetic drive unit facing the magnetic component. The pressing component is rotatably installed inside the housing, so that the pressing component and the transmission component are in transmission engagement.

Images