High-stability single-pole double-throw relay
By introducing permanent magnets, support frames, and elastic structures into the relay, the problem of high accuracy requirements for the position and dimensions of the push rod is solved, achieving a high-stability and low-cost single-pole double-throw relay design.
Patent Information
- Application Number
- CN202422119804.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-08-30
AI Technical Summary
The high precision requirements for the position and dimensions of existing relay push rods have led to increased manufacturing difficulty and higher costs.
It adopts a combination structure of permanent magnet, support frame, pressure spring and limit reaction spring. The torque of the permanent magnet pushes the push rod ball. Combined with the elastic limit ring and reaction spring, the push rod wobbling and impact are reduced. The use of spherical push rod reduces friction.
It improves the performance and safety of relays, reduces manufacturing costs, and simplifies the manufacturing process.
Smart Images
Figure CN223665381U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of radio frequency switches and relays, specifically a highly stable single-pole double-throw relay. Background Technology
[0002] A radio frequency coaxial switch (relay) is an electrical control device that causes a predetermined step change in the controlled variable in the electrical output circuit when the input quantity changes to a specified value. It establishes an interactive relationship between the control system and the controlled system. Commonly used in automated control circuits, it is essentially an "automatic switch" that uses a small current to control a large current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching.
[0003] While there are many types and quantities of relays currently available, RF switches typically utilize a push rod to actuate a movable conductive plate, making contact with a pair of connector terminals and connecting the RF signal path between the two connector terminals. A common design involves a pair of electromagnets causing a seesaw-shaped soft magnet to swing, thereby actuating the push rod to activate the switch.
[0004] However, most existing relays use electromagnets to directly drive the push rod. Both the electromagnet and the push rod are relatively hard, and there is no buffering force when they come into contact. The push rod will wobble, and the electromagnet will violently impact the top of the housing when it rotates and rebounds, thus affecting the performance of the relay. This requires high precision in the position and size of the push rod, which increases the manufacturing precision of the entire relay, increases the manufacturing difficulty of the relay, and increases the manufacturing cost of the relay. Utility Model Content
[0005] The purpose of this invention is to provide a highly stable single-pole double-throw relay to solve the problem mentioned in the background art that the position and size accuracy requirements of the push rod are relatively high, thereby improving the manufacturing accuracy of the entire relay, increasing the manufacturing difficulty of the relay, and increasing the manufacturing cost of the relay.
[0006] To achieve the above objectives, this utility model provides the following technical solution: a high-performance single-pole double-throw relay, comprising a coil, a permanent magnet, and a soft magnet. A support frame is provided below the permanent magnet, and a left pressure spring and a right pressure spring are provided on both sides below the support frame. A left limiting reaction spring and a right limiting reaction spring are provided above the permanent magnet. A left through hole and a right through hole are provided on the soft magnet. A left push rod ball and a right push rod ball are respectively provided in the left through hole and the right through hole. Limiting rings are provided around the left push rod ball and the right push rod ball. A left movable contact piece and a right movable contact piece are respectively provided below the left push rod ball and the right push rod ball. A left elastic limiting ring and a right elastic limiting ring are respectively provided above the left push rod ball and the right push rod ball.
[0007] Preferably, the support frame is an integral piece, and the permanent magnet is embedded in the upper part of the support frame.
[0008] Preferably, the lower part of the support frame is an inverted tripod, and the left pressure spring and the right pressure spring are disposed on both sides of the tripod.
[0009] Preferably, the left limiting reaction spring and the right limiting reaction spring are in a cross shape.
[0010] Preferably, the left movable contact piece and the right movable contact piece are supported by a left support piece and a right support piece, respectively.
[0011] Preferably, the left support plate and the right support plate are respectively connected to a left reaction spring and a right reaction spring.
[0012] Preferably, it also includes a base plate and a first contact, a second contact, and a third contact disposed on the base plate.
[0013] Compared with the prior art, the beneficial effects of this utility model are: a high-performance single-pole double-throw relay.
[0014] like Figure 1 The excitation coil 42 generates an electromagnetic field H (facing downwards) perpendicular to the transverse magnetic field of the permanent magnet, producing a torque on the permanent magnet 41. This causes the permanent magnet 41 to rotate clockwise, causing its right pressure spring 44 to push the push rod ball 31, resulting in the movable contact piece 21 moving downwards and connecting contact points 11 and 12. Similarly, the reverse excitation coil 42 generates a reverse electromagnetic field and a reverse torque, causing the permanent magnet 41 to rotate counterclockwise. This causes its right pressure spring 45 to push the push rod ball 32, resulting in the moving contact 22 moving downwards and connecting contact points 11 and 13. This invention features a support frame integrated below the permanent magnet. The permanent magnet is embedded in the upper part of the support frame. Left and right pressure springs are located on either side of the lower part of the support frame. An inverted triangular frame is positioned at the bottom of the support frame, with the left and right pressure springs on either side. When the permanent magnet pushes the push rod ball, it first contacts the pressure spring on the surface of the permanent magnet. Due to the elastic force of the pressure spring, the wobbling of the push rod ball is reduced. Left and right limit reaction springs are located above the permanent magnet. These springs limit the rotation of the permanent magnet, preventing it from violently impacting the housing, thus improving relay performance and reducing manufacturing costs. The push rod of this invention is a round ball. The round shape reduces friction, extending the relay's lifespan and improving safety. The spherical push rod structure simplifies the overall relay structure, making it easier to manufacture and reducing manufacturing costs. Attached Figure Description
[0015] Figure 1This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is a schematic diagram of the spherical push rod connection structure in this utility model;
[0017] Figure 3 This is a schematic diagram of the soft magnet part of this utility model.
[0018] Figure 4 This is a structural schematic diagram of the support frame of this utility model. Detailed Implementation
[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Please see Figure 1-4 This utility model provides a technical solution: a highly stable single-pole double-throw relay, including a coil 42, a permanent magnet 41, and a soft magnet 40. A support frame 46 is provided below the permanent magnet 41, and a left pressure spring 45 and a right pressure spring 44 are provided on both sides below the support frame 46. The soft magnet 40 is provided with a left through hole and a right through hole, and a left pusher ball 32 and a right pusher ball 31 are respectively provided in the left through hole and the right through hole. 31 and 32 are pusher balls, and a left elastic limiting ring 52 and a right elastic limiting ring 51 are respectively provided above the pusher balls. The function of the limiting rings is to prevent the pusher balls from leaving the through hole area where they are located.
[0021] Permanent magnet 41 (such as neodymium iron boron, samarium cobalt, etc.), the magnetization direction is transverse (solid line arrow direction M).
[0022] The support frame 46 is a single piece, with the permanent magnet 41 embedded in the upper part of the support frame 46. The lower part of the support frame 46 is an inverted triangular frame, with a left pressure spring 45 and a right pressure spring 46 located on both sides of the triangular frame.
[0023] The permanent magnet is provided with a left limiting reaction spring 48 and a right limiting reaction spring 47 above it, and the left limiting reaction spring 48 and the right limiting reaction spring 47 are in an intersecting shape.
[0024] The left push ball 32 and the right push ball 31 are respectively provided with a left movable contact piece 22 and a right movable contact piece 21 below them. The left movable contact piece 22 and the right movable contact piece 21 are generally made of a flexible conductive metal such as beryllium copper.
[0025] The left movable contact piece 22 and the right movable contact piece 21 are supported by the left support piece 23 and the right support piece 24, respectively. The left support piece 23 and the right support piece 24 can be made of engineering plastic or ceramic materials.
[0026] The left support plate 23 and the right support plate 24 are respectively connected to the left reaction spring plate 25 and the right reaction spring plate 26. The left reaction spring plate 25 and the right reaction spring plate 26 can be made of elastic metal (such as beryllium copper).
[0027] The base plate and the first contact 11, the second contact 12 and the third contact 13 set on the base plate. The base plate can be a PCB, and the first contact 11, the second contact 12 and the third contact 13 are formed on the PCB.
[0028] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.
Claims
1. A highly stable single-pole double-throw relay, comprising a coil (42), a permanent magnet (41), and a soft magnetic material (40), characterized in that, A support frame (46) is provided below the permanent magnet (41). A left pressure spring (45) and a right pressure spring (44) are provided on both sides below the support frame (46). A left limiting reaction spring (48) and a right limiting reaction spring (47) are provided above the permanent magnet (41). A left through hole and a right through hole are provided on the soft magnet (40). A left pusher ball (32) and a right pusher ball (31) are respectively provided in the left through hole and the right through hole. A left movable contact piece (22) and a right movable contact piece (21) are respectively provided below the left pusher ball (32) and the right pusher ball (31). A left elastic limiting ring (52) and a right elastic limiting ring (51) are respectively provided above the left pusher ball (32) and the right pusher ball (31).
2. The highly stable single-pole double-throw relay according to claim 1, characterized in that: The support frame (46) is an integral piece, and the permanent magnet (41) is embedded in the upper part of the support frame (46).
3. A highly stable single-pole double-throw relay according to claim 2, characterized in that: The lower part of the support frame (46) is an inverted tripod, and the left pressure spring (45) and the right pressure spring (44) are arranged on both sides of the tripod.
4. A highly stable single-pole double-throw relay according to claim 2, characterized in that: The left limiting reaction spring (48) and the right limiting reaction spring (47) are in an intersecting shape.
5. A highly stable single-pole double-throw relay according to claim 1, characterized in that: The left movable contact piece (22) and the right movable contact piece (21) are supported by the left support piece (23) and the right support piece (24), respectively.
6. A highly stable single-pole double-throw relay according to claim 5, characterized in that: The left support plate (23) and the right support plate (24) are respectively connected to the left reaction spring plate (25) and the right reaction spring plate (26).
7. A highly stable single-pole double-throw relay according to claim 3, characterized in that: It also includes a base plate and a first contact (11), a second contact (12) and a third contact (13) disposed on the base plate.