Relay and device

Abstract

The utility model discloses a relay and equipment, and the relay comprises a first contact lead-out assembly, a second contact lead-out assembly, a third contact lead-out assembly and a fourth contact lead-out assembly which are electrically connected with an external circuit, so as to form three conductive loops with the external circuit, namely a first conductive loop, a second conductive loop and a third conductive loop. When the relay is in a first state, the second contact leading-out assembly is in contact with the third contact leading-out assembly, so that the second contact leading-out assembly and an external circuit form a first conductive loop. And when the relay is in a second state, the first contact lead-out assembly is in contact with the third contact lead-out assembly to form a second conductive loop with the external circuit, and the second contact lead-out assembly is in contact with the fourth contact lead-out assembly to form a third conductive loop with the external circuit.

Description

Technical Field

[0001] This application relates to the field of electrical control device technology, and more specifically, to a relay and a device including the relay. Background Technology

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit), and is commonly used in automatic control circuits. A relay is essentially an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays a role in automatic adjustment, safety protection, and circuit switching in circuits. However, even when relays in related technologies form three conductive loops with external circuits, their size remains relatively large, and further miniaturization is needed. Utility Model Content

[0003] This application provides a relay and device to improve the problem of large size in related technologies.

[0004] The relay of this application embodiment includes a first contact lead-out component, a second contact lead-out component, a third contact lead-out component, and a fourth contact lead-out component that are electrically connected to an external circuit, so as to form three conductive loops with the external circuit, namely the first conductive loop, the second conductive loop, and the third conductive loop;

[0005] Specifically, when the relay is in the first state, the second contact lead-out component and the third contact lead-out component are connected to form the first conductive loop with the external circuit; when the relay is in the second state, the first contact lead-out component and the third contact lead-out component are connected to form the second conductive loop with the external circuit, and the second contact lead-out component and the fourth contact lead-out component are connected to form the third conductive loop with the external circuit.

[0006] According to some embodiments of this application, the first state is that the coil of the relay is supplied with one of a positive current and a negative current, and the second state is that the coil of the relay is supplied with the other of a positive current and a negative current.

[0007] According to some embodiments of this application, the first state is one of the relay coil being energized and de-energized, and the second state is the other of the relay coil being energized and de-energized.

[0008] According to some embodiments of this application, the adjacent contact lead-out components have corresponding contacts on their opposite sides.

[0009] According to some embodiments of this application, the number of conductive loops of the relay is different when it is in the first state and the second state, respectively, so as to adjust the output voltage of the external circuit.

[0010] According to some embodiments of this application, the second contact lead-out component and the third contact lead-out component are located between the first contact lead-out component and the fourth contact lead-out component, and each of the second contact lead-out component and the third contact lead-out component has a contact on both sides along the contact separation direction of the second contact lead-out component and the third contact lead-out component.

[0011] According to some embodiments of this application, it also includes:

[0012] A push rod is connected to the second contact lead-out assembly and the third contact lead-out assembly, and is used to drive the second contact lead-out assembly and the third contact lead-out assembly to move.

[0013] According to some embodiments of this application, there are two push rods, which are respectively connected to the second contact lead-out assembly and the third contact lead-out assembly. The two push rods reciprocate along the direction of movement of the push rods, and the directions of movement of the two push rods are opposite.

[0014] Along the direction of movement of the push rod, the first contact lead-out assembly, the third contact lead-out assembly, the second contact lead-out assembly, and the fourth contact lead-out assembly are arranged in sequence.

[0015] According to some embodiments of this application, both the second contact lead-out assembly and the third contact lead-out assembly include a first lead-out piece, a first moving contact, a first stationary contact, and a first moving spring. One end of the first moving spring in the length direction is connected to the first lead-out piece, and the other end of the first moving spring in the length direction is provided with the first moving contact and connected to the push rod; the first stationary contact is connected to the first lead-out piece.

[0016] Both the first contact lead-out assembly and the fourth contact lead-out assembly include a second lead-out piece and a second stationary contact, with the second stationary contact connected to the second lead-out piece;

[0017] When the relay is in the first state, the first stationary contact and the first moving contact in the second contact lead-out assembly and the third contact lead-out assembly are in contact; when the relay is in the second state, the first moving contact of the third contact lead-out assembly is in contact with the second stationary contact of the first contact lead-out assembly, and the first moving contact of the second contact lead-out assembly is in contact with the second stationary contact of the fourth contact lead-out assembly.

[0018] According to some embodiments of this application, the first contact lead-out assembly and the fourth contact lead-out assembly further include a second movable spring and a second movable contact. One end of the second movable spring in the length direction is connected to the second lead-out piece, and the other end of the second movable spring in the length direction is provided with the second movable contact. The push rod is also connected to two second movable springs.

[0019] When the relay is in the second state, the first stationary contact of the third contact lead-out component is in contact with the second moving contact of the first contact lead-out component, and the first stationary contact of the second contact lead-out component is in contact with the second moving contact of the fourth contact lead-out component.

[0020] According to some embodiments of this application, two second moving springs and two first moving springs are arranged alternately along the direction of movement of the push rod.

[0021] According to some embodiments of this application, the relay further includes a magnetic circuit portion, and the number of push rods is two;

[0022] The two push rods are driven by the same magnetic circuit portion, and the two push rods are respectively connected to the second contact lead-out assembly and the third contact lead-out assembly;

[0023] The magnetic circuit section simultaneously drives the two push rods to move, and the two push rods simultaneously drive the second contact lead-out component and the third contact lead-out component to move.

[0024] According to some embodiments of this application, it also includes:

[0025] A push rod is connected to the third contact lead-out assembly and the fourth contact lead-out assembly, and is used to drive the third contact lead-out assembly and the fourth contact lead-out assembly to move.

[0026] According to some embodiments of this application, the number of push rods is one;

[0027] The first contact lead-out assembly, the third contact lead-out assembly, the second contact lead-out assembly, and the fourth contact lead-out assembly are arranged sequentially along the movement direction of the push rod.

[0028] According to some embodiments of this application, the third contact lead-out assembly and the fourth contact lead-out assembly both include a third lead-out piece, a third movable contact, and a third movable spring. One end of the third movable spring in the length direction is connected to the third lead-out piece, and the other end of the third movable spring in the length direction is provided with the third movable contact and connected to the push rod.

[0029] Both the first contact lead-out assembly and the second contact lead-out assembly include a fourth lead-out piece and a third stationary contact, wherein the third stationary contact is connected to the fourth lead-out piece;

[0030] When the relay is in the first state, the third moving contact of the third contact lead-out component is in contact with the third stationary contact of the second contact lead-out component; when the relay is in the second state, the third moving contact of the third contact lead-out component is in contact with the third stationary contact of the first contact lead-out component, and the third moving contact of the fourth contact lead-out component is in contact with the third stationary contact of the second contact lead-out component.

[0031] According to some embodiments of this application, the third contact lead-out assembly and the fourth contact lead-out assembly both include a third lead-out piece, a third movable contact, and a third movable spring. One end of the third movable spring in the length direction is connected to the third lead-out piece, and the other end of the third movable spring in the length direction is provided with the third movable contact and connected to the push rod.

[0032] The third contact lead-out assembly has a third movable spring on both sides of the thickness direction of the third lead-out piece, and the fourth contact lead-out assembly has a third movable spring on one side of the thickness direction of the third lead-out piece.

[0033] Both the first contact lead-out assembly and the second contact lead-out assembly include a fourth lead-out piece and a third stationary contact, wherein the third stationary contact is connected to the fourth lead-out piece;

[0034] When the relay is in the first state, the third moving contact on one of the third moving springs of the third contact lead-out assembly is in contact with the third stationary contact of the second contact lead-out assembly; when the relay is in the second state, the third moving contact on the other third moving spring of the third contact lead-out assembly is in contact with the third stationary contact of the first contact lead-out assembly, and the third moving contact of the fourth contact lead-out assembly is in contact with the third stationary contact of the second contact lead-out assembly.

[0035] According to some embodiments of this application, the third moving contact and the third lead-out piece of the third contact lead-out assembly have overlapping orthographic projections on a target plane; the third moving contact and the third lead-out piece of the fourth contact lead-out assembly have overlapping orthographic projections on the target plane.

[0036] A first angle is formed between each of the third moving springs and the third lead-out piece in the third contact lead-out assembly, and a second angle is formed between the third moving springs and the third lead-out piece in the fourth contact lead-out assembly.

[0037] The target plane is perpendicular to the contact separation direction of the third moving contact and the third stationary contact.

[0038] According to some embodiments of this application, the number of push rods is one, and the relay further includes:

[0039] In the magnetic circuit section, the push rod is driven by the same magnetic circuit section, and the push rod simultaneously drives the third contact lead-out assembly and the fourth contact lead-out assembly to move.

[0040] The device according to the embodiments of this application includes the relay described in any of the above claims.

[0041] According to some embodiments of this application, two circuits are also included, each circuit having an output terminal and an input terminal. The output terminal of one circuit is electrically connected to the second contact lead-out component of the relay, the input terminal of one circuit is electrically connected to the first contact lead-out component of the relay, the output terminal of the other circuit is electrically connected to the fourth contact lead-out component of the relay, and the input terminal of the other circuit is electrically connected to the third contact lead-out component of the relay.

[0042] According to some embodiments of this application, the circuit includes a power supply.

[0043] An embodiment of the above application has at least the following advantages or beneficial effects:

[0044] The relay in this embodiment uses a shared second and third contact lead-out component. When the relay is in a first state, the second and third contact lead-out components are connected; when the relay is in a second state, the first and third contact lead-out components are connected, and the second contact lead-out component is connected to the fourth contact lead-out component. This allows the four contact lead-out components to form three conductive loops with the external circuit. The number of conductive loops formed differs depending on whether the relay is in the first or second state. Therefore, the relay in this embodiment, by using four contact lead-out components, can form three conductive loops with the external circuit. This reduces the number of contact lead-out components while maintaining the same number of conductive loops, thus reducing the relay's size and contributing to its miniaturization. Furthermore, it reduces the complexity of the device's control logic and material costs. Simultaneously, with four contact lead-out components integrated into one relay, the relay structure is more compact and assembly efficiency is higher. In addition, the wiring between the relay and the external circuit is simpler and requires less copper.

[0045] Furthermore, the push rod is driven by the same magnetic circuit. When a corresponding moving and stationary contact in the relay becomes stuck and cannot be disconnected, the magnetic circuit cannot drive the push rod to move, and thus cannot drive the moving and stationary contacts of the contact lead-out part to complete the switching. This locks the relay in the first or second state, avoids short circuits, and improves safety.

[0046] Furthermore, by setting the structure and arrangement of the contact lead-out part, the current flow direction is made to be the same or opposite, so that when the relay is in the first state or the second state, it has the ability to resist short circuits and avoids the problem of the moving and stationary contacts popping open instantly due to the occurrence of short circuit current.

[0047] Furthermore, the three conductive loops formed by the four contact lead-out components and the external circuit can be used to adjust the voltage of the external circuit, so that the relay of this embodiment can meet the user's needs for different voltages.

[0048] Furthermore, the adjacent contact lead-out components in the relay have corresponding contacts on their facing sides, so that the four contact lead-out components form three conductive loops with the external circuit, making the relay structure more compact and smaller in size. Attached Figure Description

[0049] Figure 1 The diagram shown is a top view of the relay in the first state according to the first embodiment of this application.

[0050] Figure 2 The diagram shown is a top view of the relay in the second state according to the first embodiment of this application.

[0051] Figure 3 The diagram shown is a top view of the relay in the first state according to the second embodiment of this application.

[0052] Figure 4 The diagram shown is a top view of the relay in the second state according to the second embodiment of this application.

[0053] Figure 5 The diagram shown is a top view of the relay in the first state according to the third embodiment of this application, showing only the push rod and the contact lead-out portion.

[0054] Figure 6 The diagram shown is a top view of the relay in the second state according to the third embodiment of this application, showing only the push rod and the contact lead-out portion.

[0055] Figure 7 The diagram shown is a top view of the relay in the first state according to the fourth embodiment of this application, showing only the push rod and the contact lead-out portion.

[0056] Figure 8 The diagram shown is a top view of the relay in the second state according to the fourth embodiment of this application, showing only the push rod and the contact lead-out portion.

[0057] Figure 9 The diagram shown is a wiring diagram of a relay and two power supplies included in an embodiment of this application, wherein the relay is in a first state.

[0058] Figure 10 The diagram shows a wiring diagram of a relay and two power supplies included in an embodiment of this application, wherein the relay is in a second state.

[0059] The reference numerals in the attached figures are explained as follows:

[0060] 10. Relay

[0061] 20. Electrical circuits

[0062] 100. Base

[0063] 200. Contact lead-out section

[0064] 210. First contact lead-out component

[0065] 211. First Introduction

[0066] 212. First moving contact

[0067] 213. First stationary contact

[0068] 214. First moving reed

[0069] 220. Second contact lead-out component

[0070] 221. Second lead-out piece

[0071] 222. Second moving contact

[0072] 223. Second stationary contact

[0073] 224. Second moving reed

[0074] 230. Third contact lead-out component

[0075] 231. Third lead-in

[0076] 232. Third moving contact

[0077] 233. Third moving reed

[0078] 240. Fourth contact lead-out component

[0079] 241. Fourth lead-out piece

[0080] 242. Third stationary contact

[0081] 310. Push rod

[0082] 400. Magnetic Circuit Section

[0083] 410. Coil Assembly

[0084] 420. Drive components

[0085] 421. Armature

[0086] 422. Swing arm

[0087] D1, First Direction

[0088] D2, Second Direction

[0089] D3. Third direction Detailed Implementation

[0090] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this application will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0091] It is understood that the terms "comprising" and "having," and any variations thereof, in the embodiments of this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to these processes, methods, products, or devices.

[0092] like Figure 1 and Figure 2 As shown, the relay 10 of this embodiment includes a base 100, a contact lead-out portion 200, a push rod 310, and a magnetic circuit portion 400. The contact lead-out portion 200, the push rod 310, and the magnetic circuit portion 400 are disposed on the base 100. The magnetic circuit portion 400 is used to drive the push rod 310 to move relative to the base 100. The push rod 310 is connected to the contact lead-out portion 200. The contact lead-out portion 200 is used for electrical connection with an external circuit.

[0093] The magnetic circuit portion 400 may include a coil assembly 410 and a drive member 420. The drive member 420 is driven by the coil assembly 410 and movably connected to the base 100. A push rod 310 is connected to the drive member 420 and is also connected to the contact lead-out portion 200. The drive member 420 is used to drive the push rod 310 to move. The coil assembly 410 includes a coil and a coil frame, with the coil wound around the outer periphery of the coil frame.

[0094] The contact lead-out portion 200 includes four contact lead-out assemblies, each of which is used for electrical connection with an external circuit to form three conductive loops with the external circuit, namely a first conductive loop, a second conductive loop, and a third conductive loop. The four contact lead-out assemblies are designated as first contact lead-out assembly 210, second contact lead-out assembly 220, third contact lead-out assembly 230, and fourth contact lead-out assembly 240.

[0095] Specifically, when the relay 10 is in the first state, the second contact lead-out component 220 and the third contact lead-out component 230 are connected to form a first conductive loop with the external circuit. When the relay 10 is in the second state, the first contact lead-out component 210 and the third contact lead-out component 230 are connected to form a second conductive loop with the external circuit, and the second contact lead-out component 220 and the fourth contact lead-out component 240 are connected to form a third conductive loop with the external circuit, so that the relay 10 can adjust the output voltage of the external circuit. The first, second, and third conductive loops are different.

[0096] It is understood that, in one embodiment, the relay 10 of this application can be a magnetic latching relay. The first state is when the coil of the relay 10 receives either a positive current or a negative current, and the second state is when the coil of the relay 10 receives the other of the positive and negative currents. For example, when the coil of the relay 10 receives a positive current, the relay 10 is in the first state; when the coil of the relay 10 receives a negative current, the relay 10 is in the second state. Alternatively, when the coil of the relay 10 receives a negative current, the relay 10 is in the first state; when the coil of the relay 10 receives a positive current, the relay 10 is in the second state.

[0097] In another embodiment, the relay 10 of this application can also be a general relay, with the first state being one of the relay 10's coil being energized and de-energized, and the second state being the other of the relay 10's coil being energized and de-energized. For example, when the relay 10's coil is energized, the relay 10 is in the first state; when the relay 10's coil is de-energized, the relay 10 is in the second state. Alternatively, when the relay 10's coil is de-energized, the relay 10 is in the first state; when the relay 10's coil is energized, the relay 10 is in the second state.

[0098] Therefore, by switching relay 10 to either the first or second state, the four contact lead-out components can form three sets of moving and stationary contact engagement structures. The following explanation uses a magnetically latching relay 10 as an example to illustrate the four contact lead-out components.

[0099] Please continue reading. Figure 1 and Figure 2 The push rod 310 is connected to the second contact lead-out assembly 220 and the third contact lead-out assembly 230, and is used to drive the second contact lead-out assembly 220 and the third contact lead-out assembly 230 to move, thereby realizing the formation of three sets of moving and stationary contact cooperation structure when the relay 10 is in the first state or the second state.

[0100] For ease of explanation, the first contact lead-out component 210 is numbered 1, the second contact lead-out component 220 is numbered 2, the third contact lead-out component 230 is numbered 3, and the fourth contact lead-out component 240 is numbered 4. In the embodiments of this application, the push rod 310 is connected to 2 and 3; the push rod 310 is not connected to 1 and 4.

[0101] When relay 10 is in the first state, 2 and 3 are in contact, and 1 and 3 are out of contact, 2 and 4 are out of contact, 1 and 2 are out of contact, and 3 and 4 are out of contact. When relay 10 is in the second state, 2 and 3 are in contact with 1 and 4 respectively (i.e., 1 and 3 are in contact, 2 and 4 are in contact), and 1 and 2 are out of contact, and 3 and 4 are out of contact.

[0102] As an example, there are two push rods 310, which are connected to 2 and 3 respectively. The drive member 420 is connected to the two push rods 310 and is used to simultaneously drive the two push rods 310 to reciprocate along the direction of movement of the push rods 310, and the two push rods 310 move in opposite directions. The two push rods 310 simultaneously drive the second contact lead-out assembly 220 and the third contact lead-out assembly 230 to move, so that the second contact lead-out assembly 220 and the third contact lead-out assembly 230 move synchronously.

[0103] The drive unit 420 is oscillatingly connected to the base 100 and includes an armature 421 and a swing arm 422, with the armature 421 connected to the swing arm 422. Both ends of the swing arm 422 are connected to two push rods 310. The drive unit 420 is driven to oscillate by changing the direction of the magnetic field of the coil assembly 410, thereby causing the two push rods 310 to move back and forth alternately.

[0104] The drive component 420 also includes a permanent magnet disposed between the two armatures 421. In one embodiment, the swing arm 422 may be made of plastic, and the armatures 421, the permanent magnet, and the swing arm 422 may be integrally injection molded into a single component.

[0105] For ease of explanation, the direction of motion of the push rod 310 is defined as the first direction D1, the arrangement direction of the two push rods 310 is defined as the second direction D2, and the direction perpendicular to the first direction D1 and the second direction D2 is defined as the third direction D3.

[0106] The second contact lead-out assembly 220 and the third contact lead-out assembly 230 are arranged along the movement direction of the push rod 310 (first direction D1). The first contact lead-out assembly 210 and the fourth contact lead-out assembly 240 are located on opposite sides of the second contact lead-out assembly 220 and the third contact lead-out assembly 230, respectively. That is, 2 and 3 are arranged along the first direction D1, and 1 and 4 are located on opposite sides of 2 and 3 along the first direction D1. Along the first direction D1, 1, 3, 2, and 4 are arranged sequentially, that is, 2 and 3 are located between 1 and 4.

[0107] Please continue reading. Figure 1 and Figure 2 Both 2 and 3 include a first lead-out piece 211, a first moving contact 212, a first stationary contact 213, and a first moving spring 214. One end of the first moving spring 214 along its length is connected to the first lead-out piece 211, and the other end of the first moving spring 214 along its length is provided with the first moving contact 212 and is connected to the push rod 310. The first stationary contact 213 is connected to the first lead-out piece 211. The length direction of the first moving spring 214 is parallel to the second direction D2.

[0108] The first moving contact 212 and the first moving spring 214 can be an integral structure or separate structures. When the first moving contact 212 and the first moving spring 214 are separate structures, the first moving contact 212 can be riveted to the first moving spring 214, but this is not a limitation.

[0109] The first stationary contact 213 and the first lead-out piece 211 can be an integral structure or separate structures. When the first stationary contact 213 and the first lead-out piece 211 are separate structures, the first stationary contact 213 can be riveted to the first lead-out piece 211, but this is not a limitation.

[0110] Furthermore, in one embodiment, the first stationary contact 213 of 2 and 3 may be connected only to the first lead-out piece 211, without being connected to the first moving spring 214. Of course, in another embodiment, the first stationary contact 213 may be connected to both the first lead-out piece 211 and the first moving spring 214 simultaneously, for example, the first stationary contact 213 may be riveted to both the first lead-out piece 211 and the first moving spring 214, but this is not a limitation.

[0111] In this embodiment, the two first moving springs 214 of 2 and 3 are respectively connected to the two push rods 310. Further, one end of each first moving spring 214 with a first moving contact 212 is connected to the push rod 310. When the two push rods 310 reciprocate under the action of the drive member 420, they can drive the two first moving springs 214 to swing, thereby realizing the contact or separation of the two sets of corresponding first moving contacts 212 and first stationary contacts 213. Figure 1 As shown, when relay 10 is in the first state, the two sets of corresponding first moving contacts 212 and first stationary contacts 213 in 2 and 3 are in contact, thereby forming a set of moving and stationary contact cooperation structure.

[0112] like Figure 1 and Figure 2 As shown, both 1 and 4 include a second lead-out piece 221 and a second stationary contact 223, with the second stationary contact 223 connected to the second lead-out piece 221.

[0113] The second stationary contact 223 and the second lead-out piece 221 can be an integral structure or separate structures. When the second stationary contact 223 and the second lead-out piece 221 are separate structures, the second stationary contact 223 can be riveted to the second lead-out piece 221, but this is not a limitation.

[0114] Among them, the two first leads 211 and the two second leads 221 are used for electrical connection with external circuits.

[0115] like Figure 1 As shown, when relay 10 is in the first state, the first moving contact 212 and the first stationary contact 213 corresponding to 2 and 3 are in contact to form a set of moving and stationary contact mating structures. Figure 2 As shown, when relay 10 is in the second state, the two first moving contacts 212 in 2 and 3 respectively contact the two second stationary contacts 223 in 1 and 4 to form two sets of moving and stationary contact cooperation structures. Specifically, the first moving contact 212 of 3 contacts the second stationary contact 223 of 1, and the first moving contact 212 of 2 contacts the second stationary contact 223 of 4.

[0116] As an example, the two first moving springs 214 in 2 and 3 are arranged at intervals along the first direction D1. The first lead-out piece 211 and the second lead-out piece 221 in 1 and 2 are arranged at intervals along the first direction D1, and a first moving contact 212 of 3 is provided between the first lead-out piece 211 and the second lead-out piece 221. The first lead-out piece 211 and the second lead-out piece 221 in 3 and 4 are arranged at intervals along the first direction D1, and a first moving contact 212 of 2 is provided between the first lead-out piece 211 and the second lead-out piece 221.

[0117] like Figure 1 and Figure 2As shown, in the four contact lead-out assemblies, the surfaces of two adjacent contact lead-out assemblies facing each other are provided with corresponding moving contacts and stationary contacts. In the embodiments of this application, 1 and 3 are arranged adjacently, 2 and 3 are arranged adjacently, and 2 and 4 are arranged adjacently.

[0118] Specifically, the surfaces of 1 and 3 facing each other are provided with corresponding second stationary contacts 223 and first moving contacts 212; the surfaces of 2 and 3 facing each other are provided with two sets of corresponding first moving contacts 212 and first stationary contacts 213; the surfaces of 2 and 4 facing each other are provided with second stationary contacts 223 and first moving contacts 212.

[0119] It can be seen that the first moving spring 214 of 2 and 3 has a first moving contact 212 on both sides of the thickness direction (first direction D1), so that the first moving contact 212 of 2 and 3 forms a switching contact.

[0120] like Figure 1 As shown, relay 10 is in the first state, with contacts 2 and 3 in contact, contacts 1 and 3 out of contact, and contacts 2 and 4 out of contact. At this time, if current flows in from the first lead 211 of 2 or 3, the current flows in the same direction when passing through the two first moving springs 214 of 2 and 3. Therefore, the two first moving springs 214 can generate an attractive force, which can, to a certain extent, prevent the first moving contact 212 and the first stationary contact 213 from snapping open instantly when a short circuit current occurs, thus improving the short circuit resistance.

[0121] Please refer to the following: Figure 1 and Figure 2 The push rod 310 is driven by the same magnetic circuit part 400.

[0122] In this embodiment of the application, the push rod 310 is driven by the same magnetic circuit part 400. When a certain set of corresponding moving and stationary contacts in the relay 10 stick together and cannot be disconnected, the magnetic circuit part 400 cannot drive the push rod 310 to move, and thus cannot drive the moving and stationary contacts of the contact lead-out part 200 to complete the switching, thereby locking the relay 10 in the first state or the second state, avoiding short circuit and improving safety.

[0123] like Figure 3 and Figure 4 As shown, the similarities between the relay 10 of the second embodiment and the relay 10 of the first embodiment will not be repeated here, but the differences are as follows:

[0124] Both the first contact lead-out assembly 210 and the fourth contact lead-out assembly 240 further include a second movable spring 224 and a second movable contact 222. One end of the second movable spring 224 along its length is connected to the second lead-out piece 221, and the other end of the second movable spring 224 along its length is provided with the second movable contact 222. The push rod 310 is also connected to two second movable springs 224. The length direction of the second movable spring 224 is parallel to the second direction D2.

[0125] The second moving contact 222 and the second moving spring 224 can be an integral structure or separate structures. When the second moving contact 222 and the second moving spring 224 are separate structures, the second moving contact 222 can be riveted to the second moving spring 224, but this is not a limitation.

[0126] Furthermore, in one embodiment, the second stationary contact 223 of 1 and 4 may be connected only to the second lead-out piece 221, without being connected to the second moving spring 224. Of course, in another embodiment, the second stationary contact 223 may be connected to both the second lead-out piece 221 and the second moving spring 224 simultaneously, for example, the second stationary contact 223 may be riveted to both the second lead-out piece 221 and the second moving spring 224, but this is not a limitation.

[0127] In this embodiment, the two second movable springs 224 of 1 and 4 are respectively connected to the two push rods 310. Further, one end of each second movable spring 224 with a second movable contact 222 is connected to the push rod 310. When the two push rods 310 reciprocate under the action of the drive member 420, they can drive the two second movable springs 224 to swing.

[0128] like Figure 4 As shown, when relay 10 is in the second state, the two first stationary contacts 213 of 2 and 3 are in contact with the two second moving contacts 222 of 1 and 4, respectively. Specifically, the second moving contact 222 of 1 is in contact with the first stationary contact 213 of 3, and the second stationary contact 223 of 1 is in contact with the first moving contact 212 of 3; the second moving contact 222 of 4 is in contact with the first stationary contact 213 of 2, and the second stationary contact 223 of 4 is in contact with the first moving contact 212 of 2.

[0129] Therefore, 1 and 3 form a set of moving and stationary contact mating structures, and the first moving spring 214 and the second moving spring 224 in 1 and 3 are arranged in parallel. 2 and 4 form a set of moving and stationary contact mating structures, and the first moving spring 214 and the second moving spring 224 in 2 and 4 are arranged in parallel.

[0130] Along the direction of movement of the push rod 310 (first direction D1), two second moving springs 224 and two first moving springs 214 are arranged alternately.

[0131] like Figure 4As shown, relay 10 is in the second state, with contacts 1 and 3 in contact, contacts 2 and 4 in contact, and contacts 2 and 3 disconnected. At this time, when current flows through the first moving spring 214 and the second moving spring 224 in contacts 1 and 3, the current flows in the same direction. Therefore, an attractive force is generated between the first moving spring 214 and the second moving spring 224 in contacts 1 and 3. This can, to a certain extent, prevent the corresponding moving and stationary contacts in contacts 1 and 3 from instantly opening when a short-circuit current occurs, thus improving the short-circuit withstand capability. Similarly, the current flows in the same direction between the first moving spring 214 and the second moving spring 224 in contacts 2 and 4, and an attractive force is also generated between them. This can, to a certain extent, prevent the corresponding moving and stationary contacts in contacts 2 and 4 from instantly opening when a short-circuit current occurs, thus improving the short-circuit withstand capability.

[0132] Therefore, it can be seen that the relay 10 of the second embodiment of this application, as Figure 3 As shown, when relay 10 is in the first state, a suction force can be generated between the two first moving springs 214 in 2 and 3; as Figure 4 As shown, when relay 10 is in the second state, a magnetic force can be generated between the first moving spring 214 and the second moving spring 224 in 1 and 3, and a magnetic force can also be generated between the first moving spring 214 and the second moving spring 224 in 2 and 4. Therefore, it can be seen that relay 10 has short-circuit protection capability in both the first and second states, which to a certain extent prevents the moving and stationary contacts from instantly opening when a short-circuit current occurs.

[0133] like Figure 5 and Figure 6 As shown, the similarities between the relay 10 of the third embodiment and the relay 10 of the first embodiment will not be repeated here, but the differences are as follows:

[0134] There is one push rod 310. Along the direction of movement of the push rod 310, 1, 3, 2, and 4 are arranged sequentially. The push rod 310 is connected to the third contact lead-out assembly 230 and the fourth contact lead-out assembly 240, that is, the push rod 310 is connected to 3 and 4. The push rod 310 is used to simultaneously drive the third contact lead-out assembly 230 and the fourth contact lead-out assembly 240 to move, so that the third contact lead-out assembly 230 and the fourth contact lead-out assembly 240 move synchronously.

[0135] When relay 10 is in the first state, 2 and 3 are in contact, and 1 and 3 are out of contact, 2 and 4 are out of contact, and 1 and 4 are out of contact; when relay 10 is in the second state, 1 and 3 are in contact, 2 and 4 are in contact, and 2 and 3 are out of contact, and 1 and 4 are out of contact.

[0136] like Figure 5 and Figure 6As shown, both 3 and 4 include a third lead-out piece 231, a third moving contact 232, and a third moving spring 233. One end of the third moving spring 233 in the length direction is connected to the third lead-out piece 231, and the other end of the third moving spring 233 in the length direction is provided with a third moving contact 232 and is connected to the push rod 310.

[0137] The third moving contact 232 and the third moving spring 233 can be an integral structure or separate structures. When the third moving contact 232 and the third moving spring 233 are separate structures, the third moving contact 232 can be riveted to the third moving spring 233, but this is not a limitation.

[0138] Both 1 and 2 include a fourth lead-out piece 241 and a third stationary contact 242, with the third stationary contact 242 connected to the fourth lead-out piece 241.

[0139] The third stationary contact 242 and the fourth lead-out piece 241 can be an integral structure or separate structures. When the third stationary contact 242 and the fourth lead-out piece 241 are separate structures, the third stationary contact 242 can be riveted to the fourth lead-out piece 241, but this is not a limitation.

[0140] When relay 10 is in the first state, the third moving contact 232 of 3 is in contact with the third stationary contact 242 of 2, and 1 and 3 are disconnected, and 2 and 4 are disconnected; when relay 10 is in the second state, the third moving contact 232 of 3 is in contact with the third stationary contact 242 of 1, and the third moving contact 232 of 4 is in contact with the third stationary contact 242 of 2, and 3 and 2 are disconnected.

[0141] like Figure 7 and Figure 8 As shown, the similarities between the relay 10 of the fourth embodiment and the relay 10 of the third embodiment will not be repeated here, but the differences are as follows:

[0142] Both 3 and 4 include a third lead-out piece 231, a third moving contact 232, and a third moving spring 233. One end of the third moving spring 233 in the length direction is connected to the third lead-out piece 231, and the other end of the third moving spring 233 in the length direction is provided with a third moving contact 232 and is connected to the push rod 310.

[0143] The third contact lead-out assembly 230 has a third moving spring 233 on both sides of the thickness direction of the third lead-out piece 231, and the fourth contact lead-out assembly 240 has a third moving spring 233 on the side of the third lead-out piece 231 facing the third contact lead-out assembly 230.

[0144] Both 1 and 2 include a fourth lead-out piece 241 and a third stationary contact 242, with the third stationary contact 242 connected to the fourth lead-out piece 241.

[0145] When relay 10 is in the first state, the third moving contact 232 on one of the third moving reeds 233 of 3 is in contact with the third stationary contact 242 of 2. When relay 10 is in the second state, the third moving contact 232 on the other third moving reed 233 of 3 is in contact with the third stationary contact 242 of 1, and the third moving contact 232 of 4 is in contact with the third stationary contact 242 of 2. Furthermore, 3 and 2 are disconnected.

[0146] In the embodiments of this application, one of the third movable springs 233 included in 3 is located between the third lead-out piece 231 of 3 and the fourth lead-out piece 241 of 2, and the other third movable spring 233 included in 3 is located between the third lead-out piece 231 of 3 and the fourth lead-out piece 241 of 1; the third movable spring 233 included in 4 is located between the third lead-out piece 231 of 4 and the fourth lead-out piece 241 of 2, but is not limited thereto.

[0147] Please continue reading. Figure 7 and Figure 8 The third moving contact 232 and the third lead-out piece 231 of the third contact lead-out assembly 230 have overlapping orthographic projections on a target plane; the third moving contact 232 and the third lead-out piece 231 of the fourth contact lead-out assembly 240 also have overlapping orthographic projections on the target plane; wherein, the target plane is perpendicular to the contact separation direction (first direction D1) of the third moving contact 232 and the third stationary contact 242. Furthermore, each third moving spring piece 233 of the third contact lead-out assembly 230 forms a first included angle with the third lead-out piece 231, and the third moving spring piece 233 of the fourth contact lead-out assembly 240 forms a second included angle with the third lead-out piece 231. The first and second included angles are acute angles.

[0148] like Figure 7 As shown, the third moving contact 232 on one of the third moving springs 233 of 3 contacts the third stationary contact 242 of 2. Since the orthographic projections of the third moving contact 232 of 3 and the third lead-out piece 231 on the target plane overlap, and an angle is formed between the third moving spring 233 and the third lead-out piece 231, the current flowing through the third moving spring 233 and the third lead-out piece 231 of 3 flows in opposite directions (e.g., ...). Figure 7 As indicated by the arrow in the diagram, a repulsive force can be generated between the third moving spring 233 and the third lead-out piece 231. Therefore, when the relay 10 is in the first state, the relay 10 has short-circuit protection capability.

[0149] Similarly, such as Figure 8 As shown, for 1 and 3, the current flowing through the third lead-out piece 231 and the third moving spring piece 233 of 3 flows in opposite directions (e.g., Figure 8(As shown by the arrow in the image), thus generating a repulsive force between the third moving spring 233 and the third lead-out piece 231 of 3; for 2 and 4, the current flowing through the third lead-out piece 231 and the third moving spring 233 of 4 flows in opposite directions (as shown by the arrow in the image). Figure 8 (As shown by the arrow in the diagram), a repulsive force can be generated between the third moving spring 233 and the third lead-out piece 231 of 4. Therefore, when the relay 10 is in the second state, the relay 10 has short-circuit protection capability.

[0150] Therefore, it can be seen that when relay 10 is in the first state or the second state, relay 10 has the ability to resist short circuits, which to a certain extent avoids the moving and stationary contacts from popping open instantly when a short circuit current occurs.

[0151] like Figure 9 and Figure 10 Furthermore, this application also provides a device including the relay 10 of any of the above embodiments. Since it includes the relay 10 of any of the above embodiments, the device of this application has all the advantages and beneficial effects of any of the above embodiments, which will not be repeated here.

[0152] The following is combined with Figure 9 and Figure 10 This application provides a detailed explanation of how the four contact lead-out components of the relay 10 in this embodiment are connected to an external circuit. Specifically, Figure 9 The device shown is an example of a relay including the first embodiment or the second embodiment.

[0153] The device in this embodiment further includes two circuits 20, each circuit 20 having an output terminal and an input terminal. The output terminal of one circuit 20 is electrically connected to the second contact lead-out component 220 of the relay, the input terminal of one circuit 20 is electrically connected to the first contact lead-out component 210, the output terminal of the other circuit 20 is electrically connected to the fourth contact lead-out component 240 of the relay, and the input terminal of the other circuit 20 is electrically connected to the third contact lead-out component 230.

[0154] In one embodiment, circuit 20 includes a power supply, the positive terminal of which can be considered as the output terminal of circuit 20, and the negative terminal of which can be considered as the input terminal of circuit 20. The positive and negative terminals of one power supply are electrically connected to terminals 1 and 2 of relay 10, respectively, and the positive and negative terminals of the other power supply are electrically connected to terminals 3 and 4 of relay 10, respectively. Three conductive loops are formed between the four contact leads of relay 10 and the power supply, and the number of conductive loops formed by relay 10 differs in the first and second states, allowing relay 10 to regulate the output voltage of the two power supplies.

[0155] Of course, in other embodiments, circuit 20 is not limited to including a power supply. For example, circuit 20 can also be a circuit with monitoring and control functions, which will not be listed here. In addition, circuit 20 may also include a motor.

[0156] In summary, the relay 10 and device of the present application embodiments have at least the following advantages and beneficial effects:

[0157] The relay of this embodiment uses a shared contact lead assembly (220 and 230). When the relay is in a first state, the second contact lead assembly 220 contacts the third contact lead assembly 230. When the relay is in a second state, the first contact lead assembly 210 contacts the third contact lead assembly 230, and the second contact lead assembly 220 contacts the fourth contact lead assembly 240. Thus, the four contact lead assemblies can form three conductive loops with the external circuit, and the number of conductive loops formed differs depending on whether the relay is in the first or second state. Therefore, the relay of this embodiment, by using four contact lead assemblies, can form three conductive loops with the external circuit. Compared to relays of related technologies, the relay of this embodiment reduces the number of contact lead assemblies while maintaining the same conductive loops, thereby reducing the size of the relay and contributing to its miniaturization. Furthermore, it reduces the complexity of the control logic and material costs of the device. Simultaneously, with four contact lead assemblies in one relay, the relay structure is more compact and assembly efficiency is higher. In addition, the wiring between the relay and the external circuit is simpler and requires less copper.

[0158] Furthermore, the push rod 310 is driven by the same magnetic circuit part 400. When a corresponding moving and stationary contact in the relay 10 becomes stuck and cannot be disconnected, the magnetic circuit part 400 cannot drive the push rod 310 to move, and thus cannot drive the moving and stationary contacts of the contact lead-out part 200 to complete the switching, thereby locking the relay 10 in the first state or the second state, avoiding short circuits and improving safety.

[0159] Furthermore, by setting the structure and arrangement of the contact lead-out portion 200, the current flow direction is the same or opposite, so that when the relay 10 is in the first state or the second state, it has the ability to resist short circuits, avoiding the problem of the moving and stationary contacts popping open instantly due to the occurrence of short circuit current.

[0160] Furthermore, the three conductive loops formed by the four contact lead-out components and the external circuit can be used to adjust the voltage of the external circuit, so that the relay of this embodiment can meet the user's needs for different voltages.

[0161] Furthermore, the adjacent contact lead-out components in the relay have corresponding contacts on their facing sides, so that the four contact lead-out components form three conductive loops with the external circuit, making the relay structure more compact and smaller in size.

[0162] It is understood that the various embodiments / implementations provided in this application can be combined with each other without creating contradictions, and will not be described one by one here.

[0163] In the embodiments of this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; the term "multiple" refers to two or more unless otherwise expressly defined. The terms "install," "connect," "link," and "fix" should be interpreted broadly. For example, "connect" can be a fixed connection, a detachable connection, or an integral connection; "link" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0164] In the description of the embodiments of the application, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the application and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the application.

[0165] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the claims. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0166] The above are merely preferred embodiments of the application examples and are not intended to limit the application examples. For those skilled in the art, the application examples can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the application examples should be included within the protection scope of the application examples.

Claims

1. A relay, characterized in that, It includes a first contact lead-out assembly, a second contact lead-out assembly, a third contact lead-out assembly, and a fourth contact lead-out assembly, which are electrically connected to an external circuit to form three conductive loops with the external circuit, namely the first conductive loop, the second conductive loop, and the third conductive loop; Specifically, when the relay is in the first state, the second contact lead-out component and the third contact lead-out component are connected to form the first conductive loop with the external circuit; when the relay is in the second state, the first contact lead-out component and the third contact lead-out component are connected to form the second conductive loop with the external circuit, and the second contact lead-out component and the fourth contact lead-out component are connected to form the third conductive loop with the external circuit.

2. The relay according to claim 1, characterized in that, The first state is when the coil of the relay is supplied with either a positive current or a negative current, and the second state is when the coil of the relay is supplied with the other positive current or a negative current.

3. The relay according to claim 1, characterized in that, The first state is one of the relay coil being energized and de-energized, and the second state is the other of the relay coil being energized and de-energized.

4. The relay according to claim 1, characterized in that, The adjacent contact lead-out components have corresponding contacts on their opposite sides.

5. The relay according to claim 1, characterized in that, The relay has a different number of conductive loops when it is in the first state and the second state, respectively, so as to adjust the output voltage of the external circuit.

6. The relay according to claim 1, characterized in that, The second contact lead-out component and the third contact lead-out component are located between the first contact lead-out component and the fourth contact lead-out component, and each of the second contact lead-out component and the third contact lead-out component has a contact on both sides along the contact separation direction of the second contact lead-out component and the third contact lead-out component.

7. The relay according to any one of claims 1 to 6, characterized in that, Also includes: A push rod is connected to the second contact lead-out assembly and the third contact lead-out assembly, and is used to drive the second contact lead-out assembly and the third contact lead-out assembly to move.

8. The relay according to claim 7, characterized in that, The number of push rods is two, and the two push rods are respectively connected to the second contact lead-out component and the third contact lead-out component. The two push rods reciprocate along the direction of movement of the push rod, and the directions of movement of the two push rods are opposite. Along the direction of movement of the push rod, the first contact lead-out assembly, the third contact lead-out assembly, the second contact lead-out assembly, and the fourth contact lead-out assembly are arranged in sequence.

9. The relay according to claim 7, characterized in that, Both the second contact lead-out assembly and the third contact lead-out assembly include a first lead-out piece, a first moving contact, a first stationary contact, and a first moving spring. One end of the first moving spring in the length direction is connected to the first lead-out piece, and the other end of the first moving spring in the length direction is provided with the first moving contact and connected to the push rod. The first stationary contact is connected to the first lead-out piece. Both the first contact lead-out assembly and the fourth contact lead-out assembly include a second lead-out piece and a second stationary contact, with the second stationary contact connected to the second lead-out piece; When the relay is in the first state, the first stationary contact and the first moving contact in the second contact lead-out assembly and the third contact lead-out assembly are in contact; when the relay is in the second state, the first moving contact of the third contact lead-out assembly is in contact with the second stationary contact of the first contact lead-out assembly, and the first moving contact of the second contact lead-out assembly is in contact with the second stationary contact of the fourth contact lead-out assembly.

10. The relay according to claim 9, characterized in that, Both the first contact lead-out assembly and the fourth contact lead-out assembly further include a second movable spring and a second movable contact. One end of the second movable spring in the length direction is connected to the second lead-out piece, and the other end of the second movable spring in the length direction is provided with the second movable contact. The push rod is also connected to two second movable springs. When the relay is in the second state, the first stationary contact of the third contact lead-out component is in contact with the second moving contact of the first contact lead-out component, and the first stationary contact of the second contact lead-out component is in contact with the second moving contact of the fourth contact lead-out component.

11. The relay according to claim 10, characterized in that, Along the direction of movement of the push rod, two second moving springs and two first moving springs are arranged alternately.

12. The relay according to claim 7, characterized in that, The relay also includes a magnetic circuit, and the number of push rods is two; The two push rods are driven by the same magnetic circuit portion, and the two push rods are respectively connected to the second contact lead-out assembly and the third contact lead-out assembly; The magnetic circuit section simultaneously drives the two push rods to move, and the two push rods simultaneously drive the second contact lead-out component and the third contact lead-out component to move.

13. The relay according to any one of claims 1 to 6, characterized in that, Also includes: A push rod is connected to the third contact lead-out assembly and the fourth contact lead-out assembly, and is used to drive the third contact lead-out assembly and the fourth contact lead-out assembly to move.

14. The relay according to claim 13, characterized in that, The number of push rods is one; The first contact lead-out assembly, the third contact lead-out assembly, the second contact lead-out assembly, and the fourth contact lead-out assembly are arranged sequentially along the movement direction of the push rod.

15. The relay according to claim 13, characterized in that, Both the third contact lead-out assembly and the fourth contact lead-out assembly include a third lead-out piece, a third movable contact, and a third movable spring. One end of the third movable spring in the length direction is connected to the third lead-out piece, and the other end of the third movable spring in the length direction is provided with the third movable contact and connected to the push rod. Both the first contact lead-out assembly and the second contact lead-out assembly include a fourth lead-out piece and a third stationary contact, wherein the third stationary contact is connected to the fourth lead-out piece; When the relay is in the first state, the third moving contact of the third contact lead-out component is in contact with the third stationary contact of the second contact lead-out component; when the relay is in the second state, the third moving contact of the third contact lead-out component is in contact with the third stationary contact of the first contact lead-out component, and the third moving contact of the fourth contact lead-out component is in contact with the third stationary contact of the second contact lead-out component.

16. The relay according to claim 13, characterized in that, Both the third contact lead-out assembly and the fourth contact lead-out assembly include a third lead-out piece, a third movable contact, and a third movable spring. One end of the third movable spring in the length direction is connected to the third lead-out piece, and the other end of the third movable spring in the length direction is provided with the third movable contact and connected to the push rod. The third contact lead-out assembly has a third movable spring on both sides of the thickness direction of the third lead-out piece, and the fourth contact lead-out assembly has a third movable spring on one side of the thickness direction of the third lead-out piece. Both the first contact lead-out assembly and the second contact lead-out assembly include a fourth lead-out piece and a third stationary contact, wherein the third stationary contact is connected to the fourth lead-out piece; When the relay is in the first state, the third moving contact on one of the third moving springs of the third contact lead-out assembly is in contact with the third stationary contact of the second contact lead-out assembly; when the relay is in the second state, the third moving contact on the other third moving spring of the third contact lead-out assembly is in contact with the third stationary contact of the first contact lead-out assembly, and the third moving contact of the fourth contact lead-out assembly is in contact with the third stationary contact of the second contact lead-out assembly.

17. The relay according to claim 16, characterized in that, The third moving contact and the third lead-out piece of the third contact lead-out assembly have overlapping orthographic projections on a target plane; the third moving contact and the third lead-out piece of the fourth contact lead-out assembly have overlapping orthographic projections on the target plane. A first angle is formed between each of the third moving springs and the third lead-out piece in the third contact lead-out assembly, and a second angle is formed between the third moving springs and the third lead-out piece in the fourth contact lead-out assembly. The target plane is perpendicular to the contact separation direction of the third moving contact and the third stationary contact.

18. The relay according to claim 13, characterized in that, The number of push rods is one, and the relay further includes: In the magnetic circuit section, the push rod is driven by the same magnetic circuit section, and the push rod simultaneously drives the third contact lead-out assembly and the fourth contact lead-out assembly to move.

19. A device, characterized in that, Includes the relay as described in any one of claims 1 to 18.

20. The device according to claim 19, characterized in that, It also includes two circuits, each having an output terminal and an input terminal. The output terminal of one circuit is electrically connected to the second contact lead-out component of the relay, the input terminal of one circuit is electrically connected to the first contact lead-out component of the relay, the output terminal of the other circuit is electrically connected to the fourth contact lead-out component of the relay, and the input terminal of the other circuit is electrically connected to the third contact lead-out component of the relay.

21. The device according to claim 20, characterized in that, The circuit includes a power supply.

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