A double-spring single-pole double-throw relay

Abstract

This utility model discloses a double-spring single-pole double-throw relay, including a coil, a permanent magnet, and a soft magnet. A left pressure spring and a right pressure spring are arranged on both sides below the permanent magnet. A left push rod ball and a right push rod ball are respectively arranged in the left and right through holes. A left movable contact piece and a right movable contact piece are respectively arranged below the left and right movable contact pieces. A first support piece and a second support piece are respectively arranged below the left and right movable contact pieces. Two reaction springs are arranged at both ends of the first support piece and the second support piece. The use of double reaction springs in this utility model makes the relay operation more stable, extends the service life of the relay, and improves the safety performance of the relay. The combined use of the spherical push rod structure and the double reaction springs greatly improves the stability of the relay and is easy to manufacture, reducing the manufacturing cost of the relay.

Description

Technical Field

[0001] This utility model relates to the field of radio frequency switches and relays, specifically a single-pole double-throw relay with dual springs. 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 double-spring 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 double-spring single-pole double-throw relay, comprising a coil, a permanent magnet, and a soft magnet. A left pressure spring and a right pressure spring are disposed on the lower sides of the permanent magnet. A left through hole and a right through hole are disposed on the soft magnet. A left push rod ball and a right push rod ball are respectively disposed within the left and right through holes. A left movable contact piece and a right movable contact piece are respectively disposed below the left and right movable contact pieces. A first support piece and a second support piece are respectively disposed below the left and right movable contact pieces. Two reaction springs are disposed at each end of the first support piece and each end of the second support piece.

[0007] Preferably, each of the reaction springs is provided with a guide post, and the guide post passes through the corresponding support plate.

[0008] Preferably, it also includes a base plate and a first contact, a second contact, and a third contact disposed on the base plate, wherein the first contact, the second contact, and the third contact are located below the left movable contact piece and the right movable contact piece.

[0009] Preferably, the permanent magnet has an inverted triangular support structure below it.

[0010] Compared with the prior art, the beneficial effects of this utility model are: a double-spring single-pole double-throw relay:

[0011] 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 and push the pusher 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 and push the pusher ball 32. This causes the moving contact 22 to move downwards and connect 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 the lower sides of the support frame. An inverted triangular frame is located at the bottom of the support frame, with the left and right pressure springs positioned on either side. When the permanent magnet pushes the push rod ball, it first contacts the pressure springs on the surface of the permanent magnet. Due to the elastic force of the pressure springs, the wobbling of the push rod ball is reduced. Below the push rod ball is a movable contact plate, and below the movable contact plate is a support plate connected to two reaction springs. This invention utilizes double reaction springs in the relay, making the relay operation more stable, extending its service life, and improving its safety performance. The combination of the spherical push rod structure and the double reaction springs greatly improves the relay's stability and facilitates its manufacture, reducing manufacturing costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a schematic diagram of the double-spring structure in this utility model. Detailed Implementation

[0014] 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.

[0015] Please see Figure 1-2 This utility model provides a technical solution: a double-spring single-pole double-throw relay, including a coil 42, a permanent magnet 41, and a soft magnet 40. A left pressure spring 45 and a right pressure spring 44 are arranged on the lower sides of the permanent magnet 41. A left through hole and a right through hole are provided on the soft magnet 40. A left push rod ball 32 and a right push rod ball 31 are respectively arranged inside the left and right through holes. A left movable contact piece 22 and a right movable contact piece 21 are respectively arranged below the left and right movable contact pieces 32 and 21. A first support piece 23 and a second support piece 26 are respectively arranged below the left and right movable contact pieces 22 and 21. Two reaction springs 24 are arranged at both ends of the first support piece 23 and the second support piece 26.

[0016] Movable contact pieces 21 and 22 are connected and supported by a dielectric support piece 23 and a reaction spring 24, respectively. The function of the reaction spring 24 is to push the movable contact pieces upward away from the lower contacts 11, 12, and 13. Support pieces 23 and 26 can be made of engineering plastics or ceramic materials. A guide post 25 is placed at the center of the spring 24, passing through a corresponding opening in the support piece 23, and its function is to make the support piece 23 and thus the movable contact pieces move vertically.

[0017] 31 and 32 are putter balls, which are formed from a smooth medium material with a certain degree of hardness (such as zirconium oxide, nylon, etc.).

[0018] 40 is a soft magnetic material (such as electrical pure iron, nickel-iron alloy, etc.). Round holes are made at the positions corresponding to moving contacts 21 and 22 to place push rod balls 31 and 32.

[0019] 41 is a permanent magnet (such as neodymium iron boron, samarium cobalt, etc.), magnetized in the transverse direction (solid arrow direction M). The permanent magnet 41 has an inverted triangular support structure below it, giving it a seesaw-like bistable state; that is, it is either stable in state 1 (clockwise to the bottom, as shown in the diagram) or state 2 (counter-clockwise to the bottom, not shown). This support structure can also be implemented using a pivot or groove, which are omitted here.

[0020] 42 is a coil wound around the frame 43. The excitation coil 42 will generate an electromagnetic field perpendicular to the transverse magnetic field of the permanent magnet. For example, when the coil current flows from left to right, the direction of the electromagnetic field H is from top to bottom (as shown by the dashed arrow). The direction of the electromagnetic field will also be reversed when the current direction is reversed.

[0021] 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.

[0022] 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 double spring single pole double throw relay comprising a coil (42), a permanent magnet (41) and a soft magnet (40), characterized in that, The permanent magnet (41) is provided with a left pressure spring (45) and a right pressure spring (44) on its lower sides. The soft magnet (40) is provided with a left through hole and a right through hole. The left through hole and the right through hole are respectively provided with a left pusher ball (32) and a right pusher ball (31). The left pusher ball (32) and the right pusher 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 respectively provided with a first support piece (23) and a second support piece (26) below them. Two reaction springs (24) are provided at both ends of the first support piece (23) and at both ends of the second support piece (26).

2. The dual spring single pole double throw relay of claim 1, wherein: Each of the reaction springs (24) is provided with a guide post (25), and the guide post (25) is threaded onto the corresponding support plate.

3. The dual spring single pole double throw relay of claim 2, wherein: It also includes a base plate (10) and a first contact (11), a second contact (12) and a third contact (13) disposed on the base plate, wherein the first contact (11), the second contact (12) and the third contact (13) are located below the left movable contact piece (22) and the right movable contact piece (21).

4. The dual spring, single pole, double throw relay of claim 1, wherein: The permanent magnet (41) is provided with an inverted triangular support structure below it.

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