A surface-mounted microwave relay

Abstract

The present invention discloses a surface-mounted microwave relay, which includes a substrate, a base, an electromagnetic system, and a contact system; on the top layer of the substrate, there are normally open, normally closed, and common static contacts, and on its outer periphery, there are RF lead-out terminals connected to the static contacts; on the top layer of the substrate, there are control contacts, and on its outer periphery, there are control lead-out terminals connected to the control contacts; the base includes a frame mounted on the substrate through connecting columns, and at both ends thereof, there are connecting cards, and the lower ends of the connecting cards abut against the control contacts; the electromagnetic system includes a coil assembly, a magnet, and a magnetic conductor; the coil assembly is sleeved on the magnetic conductor, and the magnet is in the magnetic conductor; on the outer side of the coil assembly, there are coil pins, and the electromagnetic system is mounted on the upper ends of the connecting cards through the coil pins; the contact system includes an armature, a moving reed assembly, and a reset reed, the armature is at the lower end of the frame, and the moving reed assembly and the reset reed are sleeved on the connecting columns; on the moving reed assembly, there is a moving reed, and the moving contact thereon is arranged opposite to the static contact. This relay has the characteristics of excellent RF performance, miniaturization, and light weight.

Description

Technical Field

[0001] The present invention belongs to the technical field of relay manufacturing, and particularly relates to a surface-mounted microwave relay. Background Art

[0002] In order to pursue excellent radio frequency performance, the radio frequency structures of existing electromechanical microwave relays usually adopt transmission structures such as shielded strip lines, coaxial lines or twin lines, and the lead-out ends mostly adopt coaxial or soldering pin types. However, the volumes of such products are relatively large. With the development of communication equipment, there is a need to develop an electromechanical microwave relay with a small volume, surface-mounted installation and excellent radio frequency performance. However, due to structural limitations, the existing microwave relays cannot meet the requirements of product miniaturization. Summary of the Invention

[0003] In order to solve the above problems existing in the prior art, the present invention provides a surface-mounted microwave relay. The technical problems to be solved by the present invention are realized through the following technical solutions:

[0004] A surface-mounted microwave relay, comprising: a substrate, a base, an electromagnetic system and a contact system; wherein,

[0005] On the top layer of the substrate, normally closed static contacts, common static contacts and normally open static contacts are provided. On the outer periphery of the substrate, three radio frequency lead-out ends are provided, and the three radio frequency lead-out ends are respectively electrically connected to the normally open static contact, the common static contact and the normally closed static contact. On the top layer of the substrate, four control contacts are provided. On the outer periphery of the substrate, four control lead-out ends are provided, and the four control lead-out ends are respectively electrically connected to the four control contacts;

[0006] The base includes a rectangular frame. At both ends of the rectangular frame, a pair of connecting cards are respectively fixed. At both ends of the rectangular frame, they are respectively fixed above the substrate through connecting columns, and the lower ends of the connecting cards are respectively abutted against the four control contacts to form electrical connections;

[0007] The electromagnetic system includes: a coil assembly, a magnet and an inverted U-shaped magnetic conductor; the coil assembly is sleeved on two legs of the U-shaped magnetic conductor, the magnet is fixed in the U-shaped magnetic conductor and is located between the coil assemblies; a pair of coil pins are fixed outside the coil assembly, and the electromagnetic system is clamped on the upper ends of the connecting cards through the coil pins, and the electromagnetic system is arranged in the rectangular frame;

[0008] The contact system includes: an armature, a moving reed assembly, and a reset reed. The armature is hinged to the lower end of the rectangular frame and is located below the electromagnetic system. The moving reed assembly and the reset reed are sleeved on the connecting column from top to bottom in sequence, with the moving reed assembly located below the armature and the reset reed located below the moving reed assembly. A pair of moving reeds are fixed on the moving reed assembly, and the four moving contacts at the ends of the moving reeds are respectively arranged opposite to the normally closed static contacts, the common static contacts, the common static contacts, and the normally open static contacts.

[0009] Further, the moving reed assembly includes a U-shaped skeleton. A pair of push rods are symmetrically arranged on the inner sides of the two legs of the U-shaped skeleton. The ends of the push rods are insulated and fixed with moving reeds. The two legs of the U-shaped skeleton are sleeved on the connecting column. The reset reed is in a U-shaped structure and is sleeved on the connecting column through the two legs of the U-shaped structure. An L-shaped elastic piece that warps upward is arranged between the two legs of the U-shaped structure, and the cantilever of the L-shaped elastic piece is located below and abuts against the right push rod of the U-shaped skeleton.

[0010] Further, a U-shaped adjusting piece is arranged above the U-shaped skeleton, and the two legs of the U-shaped adjusting piece are sleeved on the connecting column.

[0011] Further, a "mountain"-shaped bracket is arranged below the reset reed. The "mountain"-shaped bracket is sleeved on the connecting column through its two side legs, and the middle leg of the "mountain"-shaped bracket is located below the L-shaped elastic piece.

[0012] Further, the substrate is a three-layer PCB board. The normally closed static contacts, the common static contacts, and the normally open static contacts are respectively electrically connected to the three RF lead-out terminals through the top-layer circuit. The four control contacts are respectively electrically connected to the four control lead-out terminals through the middle-layer circuit.

[0013] Further, the three RF lead-out terminals and the four control lead-out terminals are all integrated on the periphery of the PCB board and are all in a semi-circular structure.

[0014] Advantages of the present invention:

[0015] 1. This product adopts the concept of "micro machinery" and combines micro electro-mechanics with microstrip transmission through "layer" design. The microwave guiding structure adopts a microstrip transmission method, making the product have excellent RF performance, miniaturization, and light weight.

[0016] 2. The electromagnetic system adopts a differential electromagnetic structure. Through an E-shaped magnetic circuit, a magnetic force difference is formed between the two poles, converting electromagnetic force into moving force, and at the same time conducting the moving stroke to the contact system to provide force and displacement for the conversion contacts.

[0017] 3. The present invention belongs to a microwave transmission circuit that can be used for single-pole double-throw conversion, and has the characteristics of small size, high reliability, excellent performance, simple structure, and strong adaptability. It is suitable for the transmission and conversion of radio frequency and microwave signals in microwave transmission equipment.

[0018] The following will further describe the present invention in detail with reference to the accompanying drawings and embodiments. Description of the Drawings

[0019] Figure 1 is a schematic diagram of the external structure of the present invention;

[0020] Figure 2 is a schematic diagram of the structure of the present invention after removing the cover;

[0021] Figure 3 is a schematic diagram of the structure of the electromagnetic system;

[0022] Figure 4 is an exploded view of the contact system;

[0023] Figure 5 is a schematic diagram of the structure of the PCB board after removing the insulating layer.

[0024] Description of the Reference Numerals in the Drawings:

[0025] 1 - Substrate; 2 - Base; 3 - Electromagnetic System; 4 - Contact System; 5 - Snap Ring; 6 - Cover; 1 - 1 - Normally Closed Static Contact; 1 - 2 - Common Static Contact; 1 - 3 - Normally Open Static Contact; 1 - 4 - RF Lead-out Terminal; 1 - 5 - Control Contact; 1 - 6 - Control Lead-out Terminal; 1 - 7 - Insulating Layer; 1 - 8 - Ground Lead-out Terminal; 2 - 1 - Rectangular Frame; 2 - 2 - Connecting Clip; 2 - 3 - Connecting Post; 3 - 1 - Coil Assembly; 3 - 2 - Magnet; 3 - 3 - U-shaped Magnetic Conductor; 3 - 4 - Coil Pin; 4 - 1 - Armature; 4 - 2 - Moving Reed Assembly; 4 - 3 - Return Reed; 4 - 4 - Moving Reed; 4 - 5 - Moving Contact; 4 - 6 - U-shaped Adjusting Piece; 4 - 7 - "Mountain"-shaped Bracket; 4 - 1 - 1 - Protrusion; 4 - 2 - 1 - U-shaped Skeleton; 4 - 2 - 2 - Push Rod; 4 - 3 - 1 - L-shaped Spring Plate. Detailed Embodiments

[0026] The following further describes the present invention in detail with specific embodiments, but the implementation manners of the present invention are not limited thereto.

[0027] Please refer to Figures 1 to 5 , the embodiment of the present invention provides a surface-mounted microwave relay, which specifically includes: a substrate 1, a base 2, an electromagnetic system 3, and a contact system 4; wherein,

[0028] On the top layer of the substrate 1, normally closed static contacts 1-1, common static contacts 1-2, and normally open static contacts 1-3 are provided. On the outer periphery (i.e., the side surface) of the substrate 1, three RF lead-out terminals 1-4 are provided, and the three RF lead-out terminals 1-4 are respectively electrically connected to the normally open static contact 1-1, the common static contact 1-2, and the normally closed static contact 1-3. On the top layer of the substrate 1, four control contacts 1-5 are provided. On the outer periphery of the substrate 1, four control lead-out terminals 1-6 are provided, and the four control lead-out terminals 1-6 are respectively electrically connected to the four control contacts 1-5.

[0029] The base 2 includes a rectangular frame 2-1. At both ends of the rectangular frame 2-1, a pair of connecting cards 2-2 are respectively riveted. At both ends of the rectangular frame 2-1, they are respectively fixed above the substrate 1 through connecting columns 2-3, and the lower ends of the connecting cards 2-2 are respectively abutted against the four control contacts 1-5 to form an electrical connection.

[0030] The electromagnetic system 3 includes: a coil assembly 3-1, a permanent magnet 3-2, and an inverted U-shaped magnetic conductor 3-3. The coil assembly 3-1 is sleeved on the two legs of the U-shaped magnetic conductor 3-3. The permanent magnet 3-2 is fixed in the U-shaped magnetic conductor and is located between the coil assemblies 3-1. A pair of coil pins 3-4 are fixed on the outside of the coil assembly 3-1. The electromagnetic system 3 is clamped on the upper ends of the connecting cards 2-2 through the coil pins 3-4, and the electromagnetic system 3 is arranged in the rectangular frame 2-1.

[0031] The electromagnetic system 3 adopts a differential electromagnetic structure. Through the E-shaped magnetic circuit formed by the U-shaped magnetic conductor 3-3 and the permanent magnet 3-2, a magnetic force difference is formed between the two poles, converting the electromagnetic force into a moving force, and at the same time conducting the stroke to the contact system 4 to provide force and displacement for the switching contacts.

[0032] The contact system 4 includes: an armature 4-1, a moving reed assembly 4-2, and a return reed 4-3. The armature 4-1 is hinged in the card slot at the lower end of the rectangular frame 2-1 and is located below the electromagnetic system 3, and maintains its initial state under the action of the permanent magnet 3-2 and the return reed 4-3, and can rotate axially along the card slot under the action of the coil assembly 3-1 and the permanent magnet 3-2. On one side of the armature 4-1, a protrusion 4-1-1 is provided, and the protrusion 4-1-1 is clamped in the corresponding groove of the rectangular frame 2-1 to prevent the two ends of the armature 4-1 from being installed reversely or the upper and lower surfaces from being installed reversely during installation, thus playing a role in positioning and guiding.

[0033] The moving reed component 4-2 and the reset reed 4-3 are sleeved on the connecting column 2-3 in sequence from top to bottom, with the moving reed component 4-2 located below the armature 4-1 and the reset reed 4-3 located below the moving reed component 4-2; a pair of moving reeds 4-4 are fixed on the moving reed component 4-2, and four moving contacts 4-5 at the ends of the moving reeds 4-4 are respectively arranged opposite to the normally closed static contacts 1-1, the common static contact 1-2, the common static contact 1-2, and the normally open static contact 1-3, that is, two moving contacts 4-5 share one common static contact 1-2.

[0034] The normally closed static contact 1-1, the common static contact 1-2, the normally open static contact 1-3 and the corresponding moving contacts 4-5 form a microstrip double-bridge radio frequency circuit. By controlling the closing and opening of the moving contacts 4-5 and the corresponding static contacts, the function of single-pole double-throw of the product radio frequency microstrip circuit is realized.

[0035] The relay further includes a snap ring 5. The electromagnetic system 3 is fixed above the contact system 4 through the snap ring 5, making the whole structure stable.

[0036] The relay further includes a housing 6. The housing 6 is hermetically sleeved on the substrate 1 through epoxy sealant, and the base 2, the electromagnetic system 3, the contact system 4 and the snap ring 5 are all located inside the housing 6.

[0037] Further, the moving reed component 4-2 includes a U-shaped skeleton 4-2-1. A pair of push rods 4-2-2 are symmetrically arranged on the inner sides of the two legs of the U-shaped skeleton 4-2-1. Moving reeds 4-4 are insulated and fixed at the ends of the push rods 4-2-2; the two legs of the U-shaped skeleton 4-2-1 are sleeved on the connecting column 2-3; the reset reed 4-3 is of a U-shaped structure and is sleeved on the connecting column 2-3 through the two legs of the U-shaped structure. An L-shaped elastic sheet 4-3-1 that warps upward is arranged between the two legs of the U-shaped structure, and the cantilever of the L-shaped elastic sheet 4-3-1 is located below and abuts against the right push rod 4-2-2 of the U-shaped skeleton 4-2-1, thereby pushing the right push rod 4-2-2 upward to separate the two moving contacts 4-5 on the right moving reed 4-4 from the common static contact 1-2 and the normally open static contact 1-3 respectively.

[0038] Further, a U-shaped adjusting piece 4-6 is arranged above the U-shaped skeleton 4-2-1. The two legs of the U-shaped adjusting piece 4-6 are sleeved on the connecting column 2-3. By changing the thickness of the adjusting piece 4-6, the rotation angle of the armature 4-1 is adjusted, so as to adjust the distance and acting force between the moving contact 4-5 and the corresponding static contact when the moving contact 4-5 acts.

[0039] Further, a "mountain"-shaped bracket 4-7 is provided below the reset reed 4-3. The two side legs of the "mountain"-shaped bracket 4-7 are sleeved on the connecting column 2-3, and the middle leg of the "mountain"-shaped bracket 4-7 is located below the fixed arm of the L-shaped elastic piece 4-3-1 to provide support for the L-shaped elastic piece 4-3-1.

[0040] This layered arrangement of the contact system 4 reduces the volume of the relay.

[0041] Further, the substrate 1 is a three-layer PCB board, and the layers are separated from each other by an insulating layer 1-7, and the insulating layer 1-7 satisfies a certain dielectric constant. The normally closed stationary contact 1-1, the common stationary contact 1-2, and the normally open stationary contact 1-3 are electrically connected to the three RF lead-out terminals 1-4 respectively through the top layer circuit. The four control contacts 1-5 are electrically connected to the four control lead-out terminals 1-6 respectively through the middle layer circuit. Six ground lead-out terminals 1-8 are connected between the upper and lower layer structures of the substrate 1. The three RF lead-out terminals 1-4, the four control lead-out terminals 1-6, and the six ground lead-out terminals 1-8 are all integrated on the periphery of the PCB board and are all semi-circular structures.

[0042] By adopting the layer design of the contact system and the microstrip transmission method of the PCB board, the volume of the product is greatly reduced, and the product has excellent RF performance. The size of the microwave relay with this structure is 13.5mm × 10.5mm × 7.1mm.

[0043] Specifically, the three-layer structure of the PCB board is a gold-plated layer, and the control lead-out terminal 1-6, the RF lead-out terminal 1-4, and the ground lead-out terminal 1-8 all adopt gold-plated half holes to realize the surface-mount function of the product and improve the RF performance of the product.

[0044] The working principle of the present invention:

[0045] When the rated voltage is applied to the control leads 1-6, electrical energy is transmitted to the coil assembly 3-1 through the connection card 2-2. After the coil assembly 3-1 is energized, the electrical energy is converted into electromagnetic suction. Due to the action of the magnetic field of the magnet 3-2, a magnetic force difference is generated between the two poles of the U-shaped magnetic conductor 3-3, driving the armature 4-1 to rotate and providing the armature 4-1 with a stroke and a holding force. The armature 4-1 overcomes the reaction force of the return spring 4-3 and applies the stroke and force to the moving contact spring assembly 4-2, causing the two moving contacts 4-5 on the moving contact spring assembly 4-2 to contact and conduct with the normally open static contact 1-3 and the common static contact 1-2 in the RF leads 1-4 on the outer periphery of the substrate 1 respectively, that is, the contacts are closed, and the normally closed static contact 1-1 is disconnected from the common static contact 1-2, that is, the contacts are opened. When the control leads 1-6 are de-energized, the electromagnetic force of the coil assembly 3-1 disappears, and the armature 4-1 is reset by the reaction force of the return spring 4-3. The moving contact spring assembly 4-2 is subjected to its own reaction force, causing the two moving contacts 4-5 on it to separate and disconnect from the normally open static contact 1-3 and the common static contact 1-2 in the RF leads 1-4 on the outer periphery of the substrate 1 respectively, and the normally closed static contact 1-1 is conducted with the common static contact 1-2, restoring the initial state. This process realizes the single-pole double-throw function.

[0046] The above content is a further detailed description of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention belongs, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. A surface-mounted microwave relay, characterized in that, Comprising: A substrate, a base, an electromagnetic system, and a contact system; wherein, On the top layer of the substrate, normally closed static contacts, common static contacts, and normally open static contacts are provided. On the outer periphery of the substrate, three RF lead-out terminals are provided, and the three RF lead-out terminals are respectively electrically connected to the normally open static contact, the common static contact, and the normally closed static contact. On the top layer of the substrate, four control contacts are provided. On the outer periphery of the substrate, four control lead-out terminals are provided, and the four control lead-out terminals are respectively electrically connected to the four control contacts; The base includes a rectangular frame. At both ends of the rectangular frame, a pair of connecting cards are respectively fixed. At both ends of the rectangular frame, they are respectively fixed above the substrate through connecting columns, and the lower ends of the connecting cards are respectively abutted against the four control contacts to form an electrical connection; The electromagnetic system includes: a coil assembly, a permanent magnet, and an inverted U-shaped magnetic conductor; the coil assembly is sleeved on two legs of the U-shaped magnetic conductor, and the permanent magnet is fixed in the U-shaped magnetic conductor and located between the coil assemblies; a pair of coil leads are fixed on the outside of the coil assembly, and the electromagnetic system is installed on the upper end of the connecting card through the coil leads, and the electromagnetic system is arranged in the rectangular frame; The contact system includes: an armature, a moving reed assembly, and a return spring; the armature is hinged at the lower end of the rectangular frame and located below the electromagnetic system. The moving reed assembly and the return spring are sequentially sleeved on the connecting column from top to bottom, and the moving reed assembly is located below the armature, and the return spring is located below the moving reed assembly; a pair of moving reeds are fixed on the moving reed assembly, and the four moving contacts at the ends of the moving reeds are respectively arranged opposite to the normally closed static contact, the common static contact, the common static contact, and the normally open static contact.

2. The surface-mounted microwave relay according to claim 1, wherein, The moving reed assembly includes a U-shaped skeleton. On the inner sides of the two legs of the U-shaped skeleton, a pair of push rods are symmetrically provided. At the ends of the push rods, moving reeds are insulated and fixed; the two legs of the U-shaped skeleton are sleeved on the connecting column; the return spring has a U-shaped structure and is sleeved on the connecting column through the two legs of the U-shaped structure. And between the two legs of the U-shaped structure, an upwardly warped L-shaped elastic piece is provided, and the cantilever of the L-shaped elastic piece is located below and abuts against the push rod on the right side of the U-shaped skeleton.

3. The surface-mounted microwave relay according to claim 2, wherein, Above the U-shaped skeleton, a U-shaped adjusting piece is provided, and the two legs of the U-shaped adjusting piece are sleeved on the connecting column.

4. The surface-mounted microwave relay according to claim 3, wherein, Below the return spring, a "mountain"-shaped bracket is provided. The "mountain"-shaped bracket is sleeved on the connecting column through its two side legs, and the middle leg of the "mountain"-shaped bracket is located below the L-shaped elastic piece.

5. The surface-mounted microwave relay according to claim 1 or 2 or 3 or 4, characterized in that, The substrate is a three-layer PCB board. The normally closed static contact, the common static contact, and the normally open static contact are respectively electrically connected to the three RF lead-out terminals through the top layer circuit; the four control contacts are respectively electrically connected to the four control lead-out terminals through the middle layer circuit.

6. The surface-mounted microwave relay according to claim 5, wherein The three RF lead-out terminals and the four control lead-out terminals are all integrated on the periphery of the PCB board and are all in a semi-circular structure.

Images