Relay and internet of things meter

Abstract

A relay and an Internet of Things meter. The relay comprises a magnetic circuit portion (2), a swing connecting member (4), and a contact portion (1); the contact portion (1) comprises a movable contact member (11) and a stationary contact member (12); the magnetic circuit portion (2) comprises a coil assembly (21) and an armature assembly (22), the coil assembly (21) comprises a coil body (211), and by means of a magnetic force, the coil body (211) drives the armature assembly (22) to swing around a first axis; the swing connecting member (4) has a first end and a second end, and the portion of the swing connecting member (4) located between the first end and the second end is suitable for rotating around a second axis; the distance from the first end to the second axis is less than the distance from the second end to the second axis; and the swing connecting member (4) is configured to rotate when the first end is actuated by the armature assembly (22), and to drive the movable contact member (11) via the second end to move to a closed position or an open position during the rotation. In this way, the small rotation stroke of the armature assembly (22) can be amplified, thereby achieving a large stroke design for opening and closing between the movable contact member (11) and the stationary contact member (12).

Description

Relays and IoT meters

[0001] This disclosure claims priority to Chinese patent application No. 202410160811.1 filed on February 4, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present disclosure relates to the technical field of electronic control devices, and in particular to a relay and an IoT meter. Background Art

[0003] A relay is an electronic control device with a control circuit (also known as an input circuit) and a controlled system (also known as an output circuit). It is commonly used in automatic control circuits. A relay is essentially an "automatic switch" that uses a smaller current to control a larger one. Therefore, it plays a role in automatic regulation, safety protection, and circuit switching.

[0004] As the application scope of relays continues to expand, relays are gradually developing towards high load and miniaturization. Among them, the demand for high load requires that relays should have a large contact gap.

[0005] In the existing related technologies, if the relay wants to increase the contact gap stroke, for example, in order to comply with the new standard of the State Grid smart IoT meter that the disconnection distance between the moving contact and the static contact must be greater than 5.5mm, then it is necessary to increase the magnetic field strength of the magnetic circuit part exponentially and increase the power consumption. In particular, the magnetic circuit part composed of the armature assembly also needs to increase the rotation angle of the armature assembly exponentially. This will cause the magnetic distance between the armature assembly and the coil assembly to increase, and make it more difficult to attract. In order to ensure that the armature assembly can still be attracted normally when the magnetic distance increases, it is also necessary to increase the magnetic force of the coil in the magnetic circuit part and the magnetic force of the magnet in the armature assembly. This will increase the volume of the coil in the magnetic circuit part and the volume of the armature assembly, and is not conducive to achieving a miniaturized design.

[0006] Public content

[0007] The embodiments of the present disclosure provide a relay and an IoT meter to increase the contact gap while ensuring the miniaturization of the magnetic circuit part.

[0008] The relay provided by the embodiment of the present disclosure includes a magnetic circuit portion, a swing connection member and a contact portion;

[0009] The contact portion includes a dynamic contact piece and a static contact piece;

[0010] The magnetic circuit portion includes a coil assembly and an armature assembly, wherein the coil assembly includes a coil body, and the coil body drives the armature assembly to swing around a first axis through magnetic force;

[0011] The swing connection member has a first end and a second end, and the swing connection member is capable of rotating about a second axis; the distance between the first end of the swing connection member and the second axis is smaller than the distance between the second end of the swing connection member and the second axis; the swing connection member is configured to rotate by receiving the armature assembly to be shifted by the first end, and to drive the movable contact member to move to the closed position or the open position by the second end during the rotation;

[0012] In the closed position, the dynamic contact is in contact with the static contact, and in the open position, the dynamic contact is separated from the static contact. According to some embodiments of the present disclosure, the second axis is parallel to the first axis.

[0013] According to some embodiments of the present disclosure, the dynamic contact has an extension direction, and dynamic contacts are respectively provided at both ends along the extension direction; the number of the static contacts is two, and both of the static contacts are provided with static contacts; the static contacts on the two static contacts respectively correspond to the dynamic contacts at both ends of the dynamic contact.

[0014] According to some embodiments of the present disclosure, in the disconnected position, the sum of the gaps between the two moving contacts at both ends of the moving contact and their corresponding static contacts is at least 5.5 mm.

[0015] According to some embodiments of the present disclosure, the number of the movable contacts is at least two, and the movable contacts are arranged in a direction perpendicular to an extending direction of the movable contacts and are connected in parallel.

[0016] According to some embodiments of the present disclosure, the axial direction of the coil body is parallel to the movement direction of the dynamic contact; the extension direction of the dynamic contact is perpendicular to the axial direction of the coil body and the first axis; the dynamic contact and the magnetic circuit portion are arranged along the extension direction of the dynamic contact.

[0017] According to some embodiments of the present disclosure, it also includes a pushing member; the dynamic contact member is installed on the pushing member and follows the pushing member; the second end of the swing connecting member can drive the pushing member to reciprocate in a direction parallel to the axial direction of the coil body, so that the dynamic contact member switches between the closed position and the open position.

[0018] According to some embodiments of the present disclosure, one of the pushing member and the swing connecting member is provided with a toggle groove, and the other is provided with a toggle portion cooperating with the toggle groove; the toggle groove has a first limiting portion and a second limiting portion arranged at intervals along the movement direction of the moving contact member; when the swing connecting member swings, the toggle portion abuts against the first limiting portion and the second limiting portion respectively.

[0019] According to some embodiments of the present disclosure, when the movable contact moves to the closed position, the toggle portion abuts against the first limiting portion to form a first abutting position; when the movable contact moves to the disconnected position, the toggle portion abuts against the second limiting portion to form a second abutting position; the first abutting position and the second abutting position are located on the same straight line parallel to the axial direction of the coil body.

[0020] According to some embodiments of the present disclosure, a swing arm is provided on the side of the armature assembly away from the coil body, the swing arm is provided with a receiving groove, and the first end of the swing connection member is located in the receiving groove; along the axial direction of the coil body, the receiving groove has a first groove wall and a second groove wall, and the distance between the first groove wall and the second groove wall is greater than the maximum width of the first end during the rotation process relative to the receiving groove.

[0021] According to some embodiments of the present disclosure, when the first groove wall or the second groove wall of the accommodating groove pushes against the first end of the swing connection member, the contact between the first groove wall or the second groove wall and the first end is point contact or line contact.

[0022] According to some embodiments of the present disclosure, along the axial direction of the coil body, the swing arm is located on a side of the first axis away from the static contact.

[0023] According to some embodiments of the present disclosure, the armature assembly includes a first armature and a second armature, the first armature being located on a side of the second armature away from the coil body; the coil body is provided with a first yoke and a second yoke at both ends along its axial direction, the first yoke being located at one end of the coil body away from the static contact, and the second yoke being located at the other end of the coil body;

[0024] Along the axial direction of the coil body, the first axis is centrally disposed between an end portion of the first yoke for mating with the armature assembly and an end portion of the second yoke for mating with the armature assembly, and the first axis is closer to a side where the static contact is located than the second axis;

[0025] The strokes of the first armature and the second armature rotating toward the first yoke are equal to the strokes of the first armature and the second armature moving toward the second yoke respectively; along the depth direction of the accommodating groove, the height of the first groove wall is greater than the height of the second groove wall.

[0026] According to some embodiments of the present disclosure, the armature assembly includes a first armature and a second armature, the first armature being located on a side of the second armature away from the coil body; a first yoke and a second yoke are respectively provided at both ends of the coil body, the first yoke being located at one end of the coil body away from the static contact, and the second yoke being located at the other end of the coil body;

[0027] Along the axial direction of the coil body, the first axis is located between an end portion of the first yoke for mating with the armature assembly and an end portion of the second yoke for mating with the armature assembly, on a side closer to the first yoke, and the first axis and the second axis are located at the same height;

[0028] The strokes by which the first armature and the second armature rotate toward the first yoke are smaller than the strokes by which the first armature and the second armature rotate toward the second yoke.

[0029] According to some embodiments of the present disclosure, the swing connection member includes a first connecting segment and a second connecting segment, and a second rotating shaft fixedly connected between the first connecting segment and the second connecting segment; the free end of the first connecting segment is the first end of the swing connection member, the free end of the second connecting segment is the second end of the swing connection member, and the axis of the second rotating shaft is the second axis.

[0030] According to some embodiments of the present disclosure, the first connecting segment, the second connecting segment and the second rotating shaft are integrally formed.

[0031] According to some embodiments of the present disclosure, which also includes a base for accommodating the contact part, the magnetic circuit part and the swing connection part, the armature assembly is provided with a first rotating shaft, the first rotating shaft is rotatably connected to the base, and the central axis of the first rotating shaft is the first axis.

[0032] According to some embodiments of the present disclosure, the relay also includes a first elastic member; the first elastic member is fixedly connected to the moving contact member; the base has a first limit surface and a second limit surface facing or opposite to each other along the movement direction of the moving contact member; the first elastic member abuts against the first limit surface and the second limit surface when the moving contact member is in the closed position and the open position to store energy, and applies a force suitable for moving away from the static contact member and a force suitable for moving toward the static contact member to the moving contact member.

[0033] According to some embodiments of the present disclosure, the first elastic member includes a first fixed portion and two first elastic portions; the first fixed portion is connected to the dynamic contact member; the two first elastic portions extend from both ends of the dynamic contact member along the extension direction of the dynamic contact member; the base has two groups of first limiting surfaces and second limiting surfaces corresponding to the two first elastic portions respectively.

[0034] According to some embodiments of the present disclosure, the relay further includes a cover body, and moving contacts are respectively provided at both ends of the moving contact along the extension direction; the number of the static contacts is two, and both of the static contacts are provided with static contacts; the cover body is connected to the base, and the cover body is provided with a first abutting portion; the base is provided with a second abutting portion, a first retaining wall and a second retaining wall; the first abutting portion and the second abutting portion cooperate to abut at least one of the two first elastic portions along a direction perpendicular to the extension direction and the action direction of the moving contact; the first retaining wall and the second retaining wall are used to abut against the side of the two first elastic portions away from each other along the extension direction of the moving contact.

[0035] According to some embodiments of the present disclosure, the relay further includes a second elastic member, and the pushing member is provided with a third limiting surface and a fourth limiting surface opposite to each other along the movement direction of the moving contact member; one end of the second elastic member abuts against the third limiting surface, and the other end of the second elastic member presses the moving contact member against the fourth limiting surface in the direction toward the static contact member.

[0036] According to some embodiments of the present disclosure, the relay further comprises a third elastic member, which is located on a side of the pushing member away from the static contact member. When the moving contact member is in the open position, the third elastic member abuts against the pushing member to store energy and causes the moving contact member to tend to move toward the closed position.

[0037] According to some embodiments of the present disclosure, the relay further includes a micro switch, which is disposed in the base, and the swing connector is used to trigger the micro switch.

[0038] According to another aspect of the present disclosure, a IoT meter includes the relay described in the present disclosure.

[0039] One embodiment disclosed above has at least the following advantages or beneficial effects:

[0040] 1. The relay provided in the embodiment of the present disclosure, by providing a swinging connection, makes it easier for the armature assembly to drive the moving contact to move, thereby reducing the magnetic driving force required to be provided by the coil assembly and reducing the volume and power consumption of the magnetic circuit portion. The distance from the first end of the swinging connection to the second axis is smaller than the distance from the second end of the swinging connection to the second axis. In this way, by using the lever amplification principle, by controlling the length ratio of the distance from the first end to the second axis to the distance from the second end to the second axis, a certain stroke amplification ratio can be controlled to amplify the small rotation stroke of the armature assembly. This achieves a large stroke design that allows the moving contact to disconnect and close relative to the static contact without increasing the rotation angle of the armature assembly, thereby achieving a large contact gap to meet the high load requirements of existing relay application scenarios. Since the rotation angle of the armature assembly does not need to be increased, the magnetic spacing between the armature assembly and the coil assembly does not need to be set very large. Therefore, there is no need to increase the magnetic force of the coil in the magnetic circuit portion and the magnetic force of the magnet in the armature assembly, which helps to ensure the miniaturization of the magnetic circuit portion and the product volume.

[0041] 2. The second axis is parallel to the first axis, which not only ensures that the extension direction of the swing connector does not occupy space in the axial direction of the first rotating shaft, further facilitating miniaturization design, but also facilitates processing of the first axial hole and the second axial hole on the base, and also facilitates assembly of the swing connector. During the rotation of the swing connector, it can also be more stable and smooth, and the end of the swing connector will not be worn due to the tilt of the swing connector.

[0042] 3. Placing the swing connector to the left of the magnetic circuit and above the contact section fully utilizes the relay's internal space. Furthermore, the eccentric design of the swing arm allows the swing connector to move further up the relay, driving the moving contact further away from the static contact, further increasing the contact gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] FIG1 is a schematic diagram showing the three-dimensional structure of a relay provided in an embodiment of the present disclosure;

[0044] FIG2 is a schematic diagram of a three-dimensional exploded structure of a relay provided in an embodiment of the present disclosure;

[0045] FIG3 shows a schematic diagram of the internal structure of a relay provided in an embodiment of the present disclosure;

[0046] FIG4 is a schematic diagram showing a dynamic contact in a closed position in a relay provided by an embodiment of the present disclosure;

[0047] FIG5 shows a partial enlarged view of point Ⅰ in FIG4;

[0048] FIG6 is a schematic diagram showing a dynamic contact in a relay provided by an embodiment of the present disclosure in an open position;

[0049] FIG7 shows a partial enlarged view of point II in FIG6;

[0050] FIG8 shows a cross-sectional view of a relay provided in an embodiment of the present disclosure;

[0051] FIG9 shows a partial enlarged view of point III in FIG8 ;

[0052] FIG10 is a schematic structural diagram of another relay provided by an embodiment of the present disclosure (the moving contact is in a closed position);

[0053] FIG11 is a schematic structural diagram of another relay provided by an embodiment of the present disclosure (the moving contact is in the disconnected position);

[0054] FIG12 is a schematic structural diagram of the armature assembly in the relay shown in FIG11 ;

[0055] FIG13 is a schematic structural diagram of a third relay provided by an embodiment of the present disclosure (the moving contact is in a closed position);

[0056] FIG14 shows a partial enlarged view of point IV in FIG13;

[0057] FIG15 is a schematic structural diagram of a base in a relay provided in an embodiment of the present disclosure;

[0058] FIG16 is a schematic structural diagram of the armature assembly in the relay shown in FIG13 ;

[0059] FIG17 shows a top view of the armature assembly shown in FIG16;

[0060] FIG18 is a schematic structural diagram of a first armature in a relay provided in an embodiment of the present disclosure;

[0061] FIG19 is a schematic structural diagram of a swing connector in a relay provided by an embodiment of the present disclosure;

[0062] FIG20 is a schematic diagram showing the switching state of the armature assembly in the relay provided by an embodiment of the present disclosure between the first position and the second position;

[0063] FIG21 is a schematic structural diagram of a magnetic circuit portion provided by an embodiment of the present disclosure (the moving contact is in a closed position);

[0064] FIG22 is a schematic structural diagram of a magnetic circuit portion provided by an embodiment of the present disclosure (the moving contact is in an open position);

[0065] FIG23 is a schematic diagram showing the structure of the dynamic contact, the pushing member, the first elastic member and the second elastic member in the relay provided by the embodiment of the present disclosure;

[0066] FIG24 is a longitudinal cross-sectional view showing the cooperation of the movable contact, the pushing member, the first elastic member, and the second elastic member in the relay provided by the embodiment of the present disclosure;

[0067] FIG25 is a schematic diagram showing the structure of the dynamic contact and the first elastic member in the relay provided by the embodiment of the present disclosure;

[0068] FIG26 shows a front view of a second elastic member in a relay provided in an embodiment of the present disclosure;

[0069] FIG27 is a schematic structural diagram of a second elastic member in a relay provided in an embodiment of the present disclosure;

[0070] FIG28 is a schematic structural diagram of the first elastic member in the relay shown in FIG13 .

[0071] Figure numerals: 1-contact portion; 11-moving contact piece; 111-moving contact point; 12-static contact piece; 121-static contact point; 13-electrical connection end; 2-magnetic circuit portion; 21-coil assembly; 211-coil body; 212-first yoke; 213-second yoke; 22-armature assembly; 221-fixing member; 2211-first rotating shaft; 222-first armature; 2221-recess; 223-second armature; 225-swing arm; 2251-first slot wall; 2252-second slot wall; 3-base; 30a-first limiting surface; 30b-second limiting surface; 31-first shaft hole; 32-second shaft hole; 33-first limiting column; 34-second limiting column; 35-protrusion; 36-first Retaining wall; 37-first boss; 4-swinging connecting member; 41-first connecting section; 411-first columnar portion; 42-second connecting section; 421-second columnar portion; 43-second rotating shaft; 5-pushing member; 50a-third limiting surface; 50b-fourth limiting surface; 51-first limiting portion; 52-second limiting portion; 53-toggle lever; 6-first elastic member; 61-bending portion; 62-adapter; 621-guide hole; 6211-first hole wall; 6212-second hole wall; 63-first fixing portion; 64-first elastic portion; 7-second elastic member; 71-second elastic portion; 711-transverse portion; 712-inclined portion; 72-second fixing portion; 8-micro switch; 9-cover; 10-fixing frame. DETAILED DESCRIPTION

[0072] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete and will fully convey the concepts of the example embodiments to those skilled in the art. Like reference numerals in the figures represent like or similar structures, and thus their detailed description will be omitted.

[0073] Referring to Figures 1 to 27 , D1 in Figure 1 represents the height direction of the relay, D2 represents the length direction of the relay, and D3 represents the thickness direction of the relay. D1, D2, and D3 are mutually perpendicular, meaning that the height, length, and thickness directions of the relay are mutually perpendicular. In this embodiment, the extending direction of the dynamic contact 11 coincides with the length direction D2 of the relay, and the axial direction of the coil body 211 coincides with the height direction D1 of the relay.

[0074] This embodiment provides a relay, including a contact part 1, a magnetic circuit part 2 and a swing connection 4; the contact part 1 includes a moving contact 11 and a static contact 12; the magnetic circuit part 2 includes a coil assembly 21 and an armature assembly 22, the coil assembly 21 includes a coil body 211, and the coil body 211 drives the armature assembly 22 to swing around a first axis through magnetic force; the swing connection 4 has a first end and a second end, and the part of the swing connection 4 located between the first end and the second end is suitable for rotating around the second axis; the distance from the first end of the swing connection to the second axis is smaller than the distance from the second end of the swing connection to the second axis; the swing connection 4 is configured to rotate by receiving the armature assembly 22 from the first end, and to drive the moving contact 11 to a closed position or an open position by the second end when rotating; in the closed position, the moving contact 11 is in contact with the static contact 12; in the open position, the moving contact 11 is separated from the static contact 12.

[0075] The magnetic circuit portion 2 provided in this embodiment is provided with a swinging connecting member 4, and the distance from the first end of the swinging connecting member 4 to the second axis is smaller than the distance from the second end to the second axis. In this way, the lever amplification principle can be used to control the ratio of the distance from the first end to the second axis and the distance from the second end to the second axis to control a certain stroke amplification ratio, so as to amplify the small rotation stroke of the armature assembly 22, thereby realizing a large stroke design for disconnecting and closing the dynamic contact 11 relative to the static contact 12 without increasing the rotation angle of the armature assembly 22, thereby realizing a large contact gap to meet the high load requirements in existing relay application scenarios; since the rotation angle of the armature assembly 22 does not need to be increased, the magnetic spacing between the armature assembly 22 and the coil assembly 21 does not need to be set very large, so there is no need to increase the magnetic force of the coil in the magnetic circuit portion 2 and the magnetic force of the magnet in the armature assembly 22, thereby helping to ensure the miniaturization of the magnetic circuit portion 2 and the relay product.

[0076] In one embodiment, the second axis is parallel to the first axis, ensuring that the extension direction of the swing connector 4 does not occupy space in the direction of the first axis, which is further conducive to achieving a miniaturized design.

[0077] In one embodiment, as shown in Figures 2, 15, and 16, the relay further includes a base 3 for accommodating the contact portion 1, the magnetic circuit portion 2, and the swingable connector 4. The armature assembly 22 is provided with a first rotating shaft 2211, which is rotatably connected to the base 3. The central axis of the first rotating shaft 2211 is a first axis. The first rotating shaft 2211 has a first shaft portion and a second shaft portion. As shown in Figure 15, a first shaft hole 31 is provided in the base 3. As shown in Figures 2 and 3, the relay further includes a fixed frame 10, which is fixedly mounted on the base 3 and has a through hole. The first shaft portion of the first rotating shaft 2211 is inserted into the first shaft hole 31, and the second shaft portion of the first rotating shaft 2211 is inserted into the through hole of the fixed frame 10. The first rotating shaft 2211 swings about its own axis relative to the base 3 to switch between a closed position and an open position.

[0078] In one embodiment, the swing connector 4 includes a first connecting section 41 and a second connecting section 42, and a second rotating shaft 43 fixedly connected between the first connecting section 41 and the second connecting section 42; the free end of the first connecting section 41 is the first end of the swing connector 4, the free end of the second connecting section 42 is the second end of the swing connector 4, and the central axis of the second rotating shaft 43 is the second axis.

[0079] As shown in Figures 4 and 19, the swing connecting member 4 is a lever structure, which includes a first connecting section 41, a second connecting section 42 and a second rotating shaft 43. The second rotating shaft 43 is located between the first connecting section 41 and the second connecting section 42. The end of the first connecting section 41 away from the second rotating shaft 43 is the first end of the swing connecting member 4, and the end of the second connecting section 42 away from the second rotating shaft 43 is the second end of the swing connecting member 4.

[0080] As shown in FIG15 , the base 3 is provided with a second axial hole 32 , and the second rotating shaft 43 is inserted into the second axial hole 32 . The second rotating shaft 43 can rotate about its own axis relative to the second axial hole 32 . The axis of the second rotating shaft 43 is the second axis, and the second axis is parallel to the first axis. Since the distance from the first end of the swing connector 4 to the second axis is less than the distance from the second end to the second axis, that is, the length of the first connecting segment 41 is less than the length of the second connecting segment 42 , the lever amplification principle can be used to control the length ratio of the first connecting segment 41 to the second connecting segment 42 to control a certain stroke amplification ratio, thereby amplifying the small rotation stroke of the armature assembly 22 and increasing the possibility of achieving a large stroke (not less than 5.5 mm) for the opening and closing of the contact portion 1 . This is further conducive to achieving a large contact gap between the dynamic contact 11 and the static contact 12 in a smaller space. In addition, the magnetic gap and stroke matching of the magnetic circuit portion 2 can be optimized to ensure magnetic efficiency, while also keeping the cost and volume within the optimal solution.

[0081] Exemplarily, the first connecting section 41 , the second connecting section 42 and the second rotating shaft 43 are integrally formed to facilitate production and processing, while also improving the structural strength of the swing connector 4 .

[0082] In one embodiment, the second axis is parallel to the first axis, which not only ensures that the extension direction of the swing connector 4 does not occupy space in the axial direction of the first rotating shaft 2211, further facilitating the realization of a miniaturized design, but also facilitates the processing of the first axial hole 31 and the second axial hole 32 on the base 3, and also facilitates the assembly of the swing connector 4. During the rotation of the swing connector 4, it can also be more stable and smooth, and the end of the swing connector 4 will not be worn due to the tilt of the swing connector 4.

[0083] In one embodiment, the dynamic contact 11 has an extension direction, and dynamic contacts 111 are respectively provided at both ends of the dynamic contact 11 along the extension direction. For example, in the example given in this embodiment, a dynamic contact 111 is respectively provided at both ends of the dynamic contact 11; the number of static contacts 12 is two, and both static contacts 12 are provided with static contacts 121; the static contacts 121 on the two static contacts 12 correspond to the dynamic contacts 111 at both ends of the dynamic contact 11, respectively.

[0084] The contact portion 1 adopts a structure in which two moving contacts 111 are connected in series, which can realize a large contact gap design. The total gap between the moving contact 11 and the static contact 121 is equal to the sum of the gaps between the two moving contacts 111 at both ends of the moving contact 11 and their respective corresponding static contacts 121, thereby reducing the movement stroke and helping to reduce the size of the relay in the height direction D1.

[0085] In one embodiment, in the disconnected position, the sum of the gaps between the two moving contacts 111 at both ends of the moving contact 11 and their corresponding static contacts 121 is at least 5.5 mm.

[0086] In this embodiment, the contact gap between the dynamic contact 11 and the static contact 12 specifically refers to the sum of the distances between the two dynamic contacts 111 of the dynamic contact 11 and the corresponding static contacts 121 when the dynamic contact 11 and the static contact 12 are in the disconnected state.

[0087] In some embodiments, there is one moving contact 11, and accordingly, there are two moving contacts 111. When the moving contact 11 is disconnected from the static contact 12, the gaps between the two moving contacts 111 at both ends of the moving contact 11 and their corresponding static contacts 121 are both 3 mm. Therefore, the total contact gap between the moving contact 11 and the static contact 12 is 6 mm. The movement stroke of the moving contact 11 relative to the static contact 12 is relatively small, but it can meet the requirements of the new standard for State Grid smart IoT meters. Of course, the gap between a moving contact 111 of the moving contact 11 and its corresponding static contact 121 is not limited to 3 mm, and can be set according to the actual application environment and actual needs.

[0088] In one embodiment, the number of the movable contacts 11 is at least two, and the movable contacts 11 are arranged in a direction perpendicular to the extension direction of the movable contacts 11 and the coil body and are connected in parallel.

[0089] After the contact part 1 is closed, a multi-contact parallel structure is formed, which plays a role of shunting. On the one hand, it is beneficial to reduce the temperature rise near the contacts. On the other hand, it is also beneficial to reduce the electric repulsion between the moving contact 111 and the static contact 121. In addition, the parallel structure of two adjacent moving contacts 11 can reduce the total contact resistance to meet the performance requirements of the relay.

[0090] In this embodiment, as shown in Figure 23, the number of dynamic contacts 11 is two, and accordingly, the number of dynamic contacts 111 is four. There are four groups of dynamic contacts 111 and static contacts 121. When the four groups of dynamic contacts 111 and static contacts 121 bear high current and voltage loads, they play the role of series structure voltage division and parallel structure current diversion, reducing the load on the contacts, improving the performance of the relay, and improving the reliability.

[0091] In other embodiments, the number of the dynamic contacts 11 may be three or more.

[0092] In one embodiment, the axial direction of the coil body 211 is parallel to the direction of movement of the movable contact 11; the extension direction of the movable contact 11 is perpendicular to both the axial direction and the first axis of the coil body 211, and the movable contact 11 and the magnetic circuit portion 2 are arranged along the extension direction of the movable contact 11. On the one hand, this allows the armature assembly 22 to be positioned on the side close to the movable contact 11, making it easier to drive. On the other hand, the height of the coil assembly 21 is utilized, so that the movable contact 11 in the contact portion 1 has sufficient space to move in its direction of movement, which is conducive to achieving a large contact gap between the movable contact 111 and the static contact 121. In this embodiment, each movable contact 11 is arranged in a direction perpendicular to both the extension direction of the movable contact 11 and the axial direction of the coil body 211.

[0093] In one embodiment, referring to Figures 6 and 16, the armature assembly 22 includes a fixing member 221 and a first armature 222 and a second armature 223 partially enclosed in the fixing member 221; a first yoke 212 and a second yoke 213 are respectively provided at both ends of the coil body 211, the first yoke 212 is located at one end of the coil body 211 away from the static contact member 12, and the second yoke 213 is located at the other end of the coil body 211; specifically, the first yoke 212 is located at the end of the first armature 222 away from the static contact member 12 and the second armature 22 3 away from the static contact 12, and the second yoke 213 is located between the first armature 222 close to the static contact 12 and the second armature 223 close to the static contact 12. As shown in FIG4 and FIG6, in the embodiment with the swing connection member 4 provided in the present application (which will be described in detail below), in the closed position, the first armature 222 is attracted to the first yoke 212, and the second armature 223 is attracted to the second yoke 213; in the open position, the first armature 222 is attracted to the second yoke 213, and the second armature 223 is attracted to the first yoke 212.

[0094] In this embodiment, the armature assembly 22 further includes a magnet disposed between the first armature 222 and the second armature 223 and secured together by a fixing member 221. The magnet itself is magnetic and provides the magnetic circuit portion 2 with a magnetic retention function. For example, the fixing member 221 may be an injection molded part that encapsulates the first armature 222, the second armature 223, and the magnet to form a single unit. Both ends of the first armature 222 and the second armature 223 are located outside the injection molded part to facilitate engagement with the first yoke 212 and the second yoke 213.

[0095] As shown in Figure 18 , the facing surfaces of the first armature 222 and the second armature 223 are each provided with a recessed portion 2221. The magnet is mounted in the space formed between the two opposing recessed portions 2221. This allows the volume of the magnet to be increased within a limited space, while maintaining the same rotational travel of the first and second armatures 222 and 223. This enhances the magnetic field strength of the magnetic circuit portion 2, improves the holding force of the small-sized relay, and ensures the relay's contact reliability. Furthermore, while maintaining the same magnetic volume, the magnetic spacing between the armature and yoke is reduced, improving magnetic efficiency and lowering the relay's operating and reset voltages. This, in turn, reduces the amount of enameled wire used and reduces production costs.

[0096] One end of the first yoke 212 is located between one end of the first armature 222 and one end of the second armature 223, while one end of the second yoke 213 is located between the other ends of the first armature 222 and the second armature 223. When the coil is driven by positive and reverse pulse voltages, the repulsive and attractive forces between the armature and the yoke enable switching between the closed and open positions.

[0097] Specifically, referring to Figures 3 and 4 , in the closed position, the end of the first armature 222 away from the static contact 12 is attracted to the first yoke 212, the other end of the first armature 222 is separated from the second yoke 213, the end of the second armature 223 away from the static contact 12 is separated from the first yoke 212, and the other end of the second armature 223 is attracted to the second yoke 213. Referring to Figure 6 , in the open position, the end of the first armature 222 away from the static contact 12 is separated from the first yoke 212, the other end of the first armature 222 is attracted to the second yoke 213, the end of the second armature 223 away from the static contact 12 is attracted to the first yoke 212, and the other end of the second armature 223 is separated from the second yoke 213.

[0098] In the attracted state, since there is almost no magnetic gap between the first armature 222, the second armature 223 and the first yoke 212 and the second yoke 213, the optimal magnetic efficiency can be guaranteed. Therefore, the coil body 211 and the armature assembly 22 do not need to be set very large, further compressing the external volume of the relay, achieving a smaller volume and more optimized cost.

[0099] In one embodiment, the relay further includes a pusher 5; the dynamic contact 11 is mounted on the pusher 5 and moves with the pusher 5; the second end of the swing connection 4 can drive the pusher 5 to reciprocate in a direction parallel to the axial direction of the coil body 211 so that the dynamic contact 11 switches between a closed position and an open position.

[0100] Exemplarily, the pusher 5 includes a bracket and a pusher block. The bracket may be a U-shaped bracket with its opening facing the pusher block. The pusher block is provided with protrusions at both ends, and the two side walls of the bracket are provided with engaging holes, with the two protrusions correspondingly engaging with the two engaging holes. The dynamic contact 11 is positioned between the bracket and the pusher block by a second elastic member 7 (see FIG. 24 ), which will be described in detail below.

[0101] In one embodiment, one of the pushing member 5 and the swing connecting member 4 is provided with a toggle groove, and the other is provided with a toggle portion cooperating with the toggle groove; the toggle groove has a first limiting portion 51 and a second limiting portion 52 arranged at intervals along the movement direction of the moving contact member 11; when the swing connecting member 4 swings, the toggle portion abuts against the first limiting portion 51 and the second limiting portion 52 respectively.

[0102] Exemplarily, when the movable contact 11 moves to the closed position, the toggle portion abuts against the first limiting portion 51 and forms a first abutting position; when the movable contact 11 moves to the open position, the toggle portion abuts against the second limiting portion 52 and forms a second abutting position; the first abutting position and the second abutting position are located on the same straight line parallel to the axial direction of the coil body.

[0103] In this embodiment, referring to Figures 3, 4, 6 and 20, the pushing member 5 is provided with a toggle groove, and specifically, the pushing block is provided with a toggle groove, and the swing connecting member 4 is provided with a toggle portion. By controlling the swing connecting member 4 to move in a fan-shaped symmetrical manner, it is ensured that the first abutment position and the second abutment position are located on the same straight line parallel to the axial direction of the coil body 211, thereby ensuring the movement stability of the dynamic contact member 11 and reducing the component force generated by the lateral deviation to affect the reliability of the contact part 1.

[0104] In this embodiment, the toggle groove is arranged in the pushing member 5, and the two groove walls of the toggle groove are respectively the first limiting portion 51 and the second limiting portion 52. The first limiting portion 51 is close to the opening of the U-shaped bracket, and the second limiting portion 52 is away from the opening of the U-shaped bracket; the second end of the swing connecting member 4 is located in the toggle groove, and the side of the second end close to the first limiting portion 51 is the first limiting matching portion, and the side of the second end close to the second limiting portion 52 is the second limiting matching portion.

[0105] Exemplarily, the second end is formed into a second columnar portion 421, which serves as a toggle portion and is located in the toggle groove. The portion of the circumferential surface of the second columnar portion 421 close to the first limiting portion 51 is the first limiting fitting portion, and the portion of the circumferential surface of the second columnar portion 421 close to the second limiting portion 52 is the second limiting fitting portion.

[0106] In other embodiments, a toggle portion may be provided on the pushing block, and a toggle groove may be provided at the second end of the swing connector 4 .

[0107] In one embodiment, a swing arm 225 is provided on the side of the armature assembly 22 away from the coil body 211, and the swing arm 225 is provided with a receiving groove, and the first end of the swing connector 4 is located in the receiving groove; along the axial direction of the coil body 211, the receiving groove has a first groove wall 2251 and a second groove wall 2252, and the distance between the first groove wall 2251 and the second groove wall 2252 is greater than the maximum width of the first end during the rotation process relative to the receiving groove.

[0108] 4 and 17 , the swing arm 225 is provided on the surface of the fixing member 221 close to the first armature 222, and along the axial direction of the coil body 211, the swing arm 225 is located on the side of the first axis close to the first yoke 212, that is, the swing arm 225 is located on the side of the first axis away from the static contact member 12, and is eccentrically arranged on the fixing member 221. The swing arm 225 is provided with a receiving groove, and the first end of the swing connector 4 is formed as a first columnar portion 411, and the first columnar portion 411 is located in the receiving groove; along the axial direction of the coil body 211, the receiving groove has a first groove wall 2251 and a second groove wall 2252, and the distance between the first groove wall 2251 and the second groove wall 2252 is greater than the first end of the swing connector 4. (i.e., the maximum width of the first columnar portion 411) during rotation relative to the accommodating groove; illustratively, during the clockwise swinging of the armature assembly 22 about the first axis, the first groove wall 2251 can approach and abut the first end, thereby driving the first end to swing counterclockwise about the axis of the second rotating shaft 43. When the first end abuts the first groove wall 2251, a gap is formed between the first end and the second groove wall 2252. During the counterclockwise swinging of the armature assembly 22 about the first axis, the second groove wall 2252 can approach and abut the first end, thereby driving the first end to swing clockwise about the second rotating shaft 43. When the first end abuts the second groove wall 2252, a gap is formed between the first end and the first groove wall 2251. The idle stroke offsets the lateral force component of the fan-shaped motion, thereby reducing the deflection of the pusher 5 and the movable contact member 11.

[0109] Exemplarily, the swing arm 225 and the fixing member 221 are integrally formed. Exemplarily, the swing arm 225 and the fixing member 221 can be integrally formed by injection molding.

[0110] In one embodiment, when the first groove wall 2251 of the receiving groove pushes against the first end, the first groove wall 2251 and the first end are in line contact. For example, the first columnar portion 411 is a cylindrical structure, and the circumferential surface of the first columnar portion 411 can be tangent to the first groove wall 2251, forming a line contact to reduce friction. The maximum width of the first columnar portion 411 can be the diameter of the first columnar portion 411.

[0111] When the second groove wall 2252 of the accommodating groove pushes against the first end, the second groove wall 2252 and the first end are in line contact.

[0112] Of course, the first groove wall 2251 or the second groove wall 2252 of the receiving groove may also be in point contact with the first end. That is, when the first groove wall 2251 or the second groove wall 2252 of the receiving groove pushes against the first end, the contact between the first groove wall 2251 or the second groove wall 2252 and the first end is point contact or line contact.

[0113] In one embodiment, along the axial direction of the coil body 211 , the swing arm 225 is located on a side of the first axis away from the static contact 12 .

[0114] In this embodiment, the dynamic contact 11 and the magnetic circuit portion 2 are arranged along the extension direction of the dynamic contact 11. The swing connector 4 is arranged in the overlapping space between the magnetic circuit portion 2 and the contact portion 1 in the length direction D2 and the height direction D1. This maximizes space conservation. In other words, arranging the swing connector 4 to the left of the magnetic circuit portion 2 and above the contact portion 1 fully utilizes the internal space of the relay. In this case, the swing arm 225 is configured as an eccentric structure, allowing the swing connector 4 to move in the upper space, thereby driving the dynamic contact 11 to move further away from the static contact 12, further achieving a larger contact gap.

[0115] In one design, along the axial direction of the coil body 211, the first axis is centrally disposed between the end of the first yoke 212 for mating with the armature assembly 22 and the end of the second yoke 213 for mating with the armature assembly 22, and the first axis is closer to the side where the static contact 12 is located than the second axis; the travel of the first armature 222 and the second armature 223 respectively rotating toward the first yoke 212 is equal to the travel of the first armature 222 and the second armature 223 respectively rotating toward the second yoke 213; and along the depth direction of the accommodating groove, the height of the first groove wall 2251 is greater than the height of the second groove wall 2252. As shown in FIG17 , the depth direction of the accommodating groove is consistent with the arrangement direction of the first armature 222 and the second armature 223.

[0116] Since the swing arm 225 is eccentric relative to the first axis, the swing arm 225 will exhibit an asymmetric fan-shaped motion. Therefore, the swing arm 225 is designed to have different lengths. Specifically, along the depth direction of the accommodating groove, the height of the first groove wall 2251 is greater than the height of the second groove wall 2252, so that the first end can move within the accommodating groove. When the armature assembly 22 is in the closed position, the circumferential surface of the first columnar portion 411 can contact the first groove wall 2251 as much as possible, preventing the first columnar portion 411 from leaving the accommodating groove, thereby driving the second end to move to the first abutment position, and ensuring that the first abutment position and the second abutment position are located on the same straight line parallel to the axial direction of the coil body 211, thereby ensuring the movement stability of the dynamic contact member 11 and reducing the component force generated by lateral deflection that affects the reliability of the contact portion 1. As shown in Figure 17, the depth direction of the accommodating groove is consistent with the arrangement direction of the first armature 222 and the second armature 223.

[0117] In this design, the strokes of the first armature 222 and the second armature 223 rotating toward the first yoke 212 are equal to the strokes of the first armature 222 and the second armature 223 rotating toward the second yoke 213. Specifically, when the armature assembly 22 is located in the middle position between the closed position and the open position, the first armature 222 and the second armature 223 are symmetrically arranged on both sides of the center line between the end of the first yoke 212 for mating with the armature assembly 22 and the end of the second yoke 213 for mating with the armature assembly 22. The angle between the pole surface of the first armature 222 facing the first yoke 212 and the center line is equal to the angle between the pole surface of the second yoke 213 facing the first yoke 212 and the center line, thereby ensuring that the swing angles of the armature assembly 22 are equal when switching between the closed position and the open position, thereby ensuring the stability of the relay during the disconnection and attraction processes.

[0118] In another design, referring to Figures 10 to 12, along the axial direction of the coil body 211, the first axis is located between the end of the first yoke 212 for cooperating with the armature assembly 22 and the end of the second yoke 213 for cooperating with the armature assembly 22, and is closer to the side where the first yoke 212 is located, and the first axis and the second axis are located at the same height position; the stroke of the first armature 222 and the second armature 223 respectively rotating toward the first yoke 212 is smaller than the stroke of the first armature 222 and the second armature 223 respectively rotating toward the second yoke 213.

[0119] Specifically, the first rotating shaft 2211 is positioned offset from the center of the armature assembly 22, ensuring that the planes containing the axes of the first rotating shaft 2211 and the second rotating shaft 43 are parallel to the extension direction of the movable contact 11. Furthermore, to ensure symmetrical fan-shaped movement of the swing connector 4 and, therefore, that the first and second abutment positions are located on the same straight line parallel to the axial direction of the coil body 211, the first armature 222 and the second armature 223 are arranged asymmetrically.

[0120] 10 and 12 , the distance d1 between the pole surfaces of the first armature 222 and the second armature 223 facing the first yoke 212 is smaller than the distance d2 between the pole surfaces of the first armature 222 and the second armature 223 facing the second yoke 213. When the armature assembly 22 rotates around the first axis to a set angle, the stroke traveled by one end of the first armature 222 close to the first yoke 212 is smaller than the stroke traveled by the other end of the second armature 223 close to the second yoke 213, so as to ensure that when the moving contact 111 contacts the static contact 121, the first armature 222 can be attracted to the first yoke 212, and at the same time, the second armature 223 can be attracted to the second yoke 213.

[0121] For example, in order to ensure that the first armature 222 is attracted to the first yoke 212 and the second armature 223 is attracted to the second yoke 213, it is necessary to adjust the shape and installation angle of the first armature 222 and the second armature 223 according to the swing angle of the armature assembly 22, and then adjust the angle between the pole surface and the center line of the first armature 222 and the second armature 223.

[0122] It should be noted that since the stroke of the first armature 222 and the second armature 223 moving in the direction close to the first yoke 212 is different from the stroke of the first armature 222 and the second armature 223 moving in the direction close to the second yoke 213, anti-fool marks can be made during production and processing to facilitate quick assembly.

[0123] In this alternative design, along the depth direction of the accommodating groove, the height of the first groove wall 2251 is equal to the height of the second groove wall 2252 .

[0124] It should also be noted that a protrusion can be provided on the swing arm 225, and a groove can be provided on the first end of the swing connection member 4, with the protrusion located in the groove of the swing connection member 4, and the two move in coordination.

[0125] In this embodiment, referring to FIG. 1 and FIG. 2 , the relay further includes a micro switch 8 , which is disposed in the base 3 , and the swing connector 4 can be used to trigger the micro switch 8 .

[0126] In one embodiment, the relay further includes a first elastic member 6, which is fixedly connected to the moving contact 11, and the base 3 has a first limit surface 30a and a second limit surface 30b facing or opposite to each other along the movement direction of the moving contact 11; the first elastic member 6 abuts against the first limit surface 30a and the second limit surface 30b when the moving contact 11 is in the closed position and the open position, respectively, to store energy, and applies a force to the moving contact 11 that can move away from the static contact 12 and a force that can move toward the static contact 12, respectively.

[0127] In one design, referring to Figures 5 and 7, the base 3 is provided with a first limiting column 33 and a second limiting column 34; the first limiting column 33 and the second limiting column 34 are spaced apart from each other along the movement direction of the dynamic contact 11 and their facing surfaces respectively constitute a second limiting surface 30b and a first limiting surface 30a.

[0128] In this design, as shown in Figure 25, the first elastic member 6 includes a first fixed portion 63 and two first elastic portions 64; the first fixed portion 63 is connected to the dynamic contact member 11; the two first elastic portions 64 extend out from both ends of the automatic contact member 11 along the extension direction of the dynamic contact member 11; the base 3 has two groups of first limiting surfaces 30a and second limiting surfaces 30b corresponding to the two first elastic portions 64 respectively.

[0129] Specifically, there are two first limiting posts 33 and two second limiting posts 34 . The two first limiting posts 33 are oppositely arranged along the extension direction of the movable contact 11 , and the two second limiting posts 34 are oppositely arranged along the extension direction of the movable contact 11 .

[0130] 4 and 5 , when the movable contact 11 is in the closed position, the two second limiting columns 34 abut against their respective first elastic portions 64 simultaneously, so that the first elastic member 6 stores energy and the movable contact 11 tends to move toward the open position.

[0131] 6 and 7 , when the movable contact 11 is in the open position, the two first limiting columns 33 abut against their respective first elastic portions 64 at the same time, so that the first elastic member 6 stores energy and the movable contact 11 tends to move toward the closed position.

[0132] As shown in Figure 2, the relay also includes a cover body 9, which is fixedly connected to the base 3, and the cover body 9 is provided with a first abutting portion (not shown in the figure); the base 3 is provided with a second abutting portion, a first retaining wall 36 and a second retaining wall; the first abutting portion and the second abutting portion cooperate to abut at least one of the two first elastic portions 64 along a direction perpendicular to the extension direction and the action direction of the moving contact 11; the first retaining wall 36 and the second retaining wall are used to abut against the sides of the two first elastic portions 64 away from each other along the extension direction of the moving contact 11, so as to limit the range of movement of the first elastic member 6 along the direction parallel to the extension direction of the moving contact 11, thereby improving the movement smoothness of the moving contact 11.

[0133] As shown in Figure 9, the second abutting portion is a first boss 37 arranged in the base 3, and the first abutting portion can be a second boss (not shown in the figure) arranged on the inner surface of the cover body 9. The second boss and the first boss 37 can simultaneously abut the two thickness surfaces of the first elastic portion 64, wherein the thickness surface is the two side surfaces of the first elastic portion 64 along a direction perpendicular to the extension direction and the action direction of the dynamic contact member 11.

[0134] The first abutting portion and the second abutting portion may be two groups, respectively abutting against the two first elastic portions 64 , thereby further improving the movement stability of the dynamic contact member 11 and the pushing member 5 .

[0135] As shown in FIG. 5 , the first retaining wall 36 may be an inner wall of the base 3 , and the second retaining wall may be a protrusion (not shown) provided on the base 3 .

[0136] 4 to 7 , a bending portion 61 is formed at the end of the first elastic member 6 . Specifically, the ends of the two first elastic portions 64 are both provided with a bending portion 61 . The outer side surface of the bending portion 61 can abut against the first retaining wall 36 or the second retaining wall.

[0137] Illustratively, the first elastic member 6 is a bent spring structure with a bent portion 61 formed at each end of the spring structure. The bent portion 61 bends away from the movable contact member 11. The spring structure is perpendicular to the base 3, and the thickness surface of one side of the spring structure in the longitudinal direction abuts the base 3 to ensure smooth movement of the pusher 5 and the movable contact member 11.

[0138] In this design, the bending portion 61 has an arc-shaped structure. In the closed position, the inner arc surface of the arc-shaped structure adapts to and abuts the circumferential surface of the first limiting column 33. In the open position, the outer arc surface of the arc-shaped structure abuts the first retaining wall 36 or the second retaining wall of the base 3.

[0139] Of course, a protrusion may also be provided on the side wall of the base 3 , and the protrusion forms the first retaining wall 36 .

[0140] In another design, as shown in Figures 13 and 14, the base 3 is provided with a protrusion 35; the protrusion 35 forms a first limiting surface 30a and a second limiting surface 30b on both sides of the movement direction of the dynamic contact member 11; the end of the first elastic member 6 is provided with a guide hole 621, and the first elastic member 6 is sleeved on the outside of the protrusion 35 through the guide hole 621.

[0141] A guide hole 621 is provided at the end of the first elastic member 6; a protrusion 35 is provided at the base 3, and when the first elastic member 6 is deformed, it moves back and forth relative to the protrusion 35 through the guide hole 621; along the length direction of the guide hole 621, the hole wall of the guide hole 621 away from the end of the first elastic member 6 is the first hole wall 6211, and the hole wall of the guide hole 621 close to the end of the first elastic member 6 is the second hole wall 6212, the part of the circumferential surface of the protrusion 35 close to the first hole wall 6211 is the first limiting surface 30a, and the part of the circumferential surface of the protrusion 35 close to the second hole wall 6212 is the second limiting surface 30b.

[0142] Exemplarily, the main body of the first elastic member 6 is a sheet-like structure, with adapter plates 62 provided at both ends. The adapter plates 62 are substantially perpendicular to the plate surface of the first elastic member 6, and the guide hole 621 is provided on the adapter plate 62. Exemplarily, the adapter plate 62 and the first elastic member 6 are integrally formed, and the guide hole 621 is an oblong hole.

[0143] In the above design, the first fixing portion 63 of the first elastic member 6 is fixedly connected to the dynamic contact member 11 when its plate surface is attached to the surface of the dynamic contact member 11. In this way, since the first elastic portion 64 of the first elastic member 6 is thin in the movement direction of the dynamic contact member 11, it is easy to deform and meets the elastic deformation requirements required by this embodiment. On this basis, by setting an adapter plate 62 perpendicular to the plate surface of the first elastic member 6, the guide hole 621 can be formed without increasing the thickness of the first elastic member 6 body, thereby ensuring that the first elastic member 6 has excellent elastic deformation ability without increasing the material used in the first elastic member 6.

[0144] In the closed position, the first hole wall 6211 abuts against the first limiting surface 30a on the protrusion 35. When the dynamic contact 11 switches from the closed position to the open position, the first elastic member 6 releases energy and extends to both ends. At this time, the second hole wall 6212 approaches the protrusion 35 until the second hole wall 6212 abuts against the second limiting surface 30b on the protrusion 35, and the dynamic contact 11 is in the open position.

[0145] As shown in Figure 28, two adapter plates 62 are provided at each end of the first elastic member 6. The two adapter plates 62 are parallel and spaced apart from each other on both sides of the first elastic portion 64 along its width direction. The two adapter plates 62 are both provided with guide holes 621, and the two adapter plates 62 are both sleeved on the outside of the protrusion 35 through the guide holes 621 thereon, so as to enhance the structural strength of the fitting point between the first elastic member 6 and the protrusion 35, so that the movement of the pushing member 5 and the dynamic contact member 11 is smoother.

[0146] In this embodiment, with the support of the first elastic member 6 and the swing connecting member 4, the pushing member 5 can be suspended in the base 3, eliminating the friction between the pushing member 5 and the base 3, and the required coil driving force is also smaller, thereby reducing the volume of the magnetic circuit part 2.

[0147] In one embodiment, as shown in Figures 24, 26, and 27, the relay further includes a second elastic member 7, and the pusher 5 is provided with a third limiting surface 50a and a fourth limiting surface 50b, which are opposite to each other, along the direction of movement of the movable contact 11. One end of the second elastic member 7 abuts the third limiting surface 50a, and the other end of the second elastic member 7 presses the movable contact 11 against the fourth limiting surface 50b in the direction toward the static contact 12. For example, the third limiting surface 50a is the surface of the pusher facing the movable contact 11, and the fourth limiting surface 50b is the surface of the bracket facing away from the static contact 12. The fourth limiting surface 50b abuts the surface of the movable contact 11 near the static contact 12.

[0148] In this embodiment, the dynamic contact member 11 is stably located on the fourth limiting surface 50 b of the pushing member 5 under the action of the second elastic member 7 , and the pushing member 5 and the dynamic contact member 11 move synchronously.

[0149] In one embodiment, the second elastic member 7 includes a second fixing portion 72 and a second elastic portion 71 . The second fixing portion 72 is connected to the dynamic contact member 11 , and the second elastic portion 71 abuts against the third limiting surface 50 a .

[0150] For example, there are two second fixing portions 72 , which are integrally formed at both ends of the second elastic portion 71 . The two second fixing portions 72 are riveted to both ends of the movable contact 11 .

[0151] The second fixing portions 72 at both ends of the second elastic member 7 are fixedly connected to the two ends of the dynamic contact member 11 respectively. The part between the two ends of the second elastic member 7 constitutes the second elastic portion 71 and abuts against the pushing block in the pushing member 5. In order to improve stability, this part is also positioned with the pushing block by respectively providing positioning protrusions and positioning holes that can be plugged into each other.

[0152] Since the second elastic member 7 has a tensioning force, when the moving contact 111 abuts the static contact 121 and the pushing member 5 reaches the overtravel, the pushing member 5 can abut the moving contact 11 through the second elastic member 7, so that the moving contact 11 forms an abutment with the static contact 12 through elastic abutment, ensuring that the moving contact 111 and the static contact 121 maintain a certain contact pressure and can still maintain the contact pressure after electric grinding, and can use the spring force to buffer and reduce bounce when the moving contact 111 and the static contact 121 are closed, and when the moving contact 111 and the static contact 121 are separated, the moving contact 111 obtains a certain initial kinetic energy, breaks the fusion welding point, increases the initial breaking speed, reduces the arcing time, and thus increases the speed of medium recovery.

[0153] For example, as shown in Figure 26, the second elastic portion 71 includes a transverse portion 711 and inclined portions 712 located at both ends of the transverse portion 711, the angle between the inclined portion 712 and the transverse portion 711 is an obtuse angle, the second fixed portion 72 is connected to the inclined portion 712, the projection of the free end of the second fixed portion 72 on the plane where the transverse portion 711 is located is located within the transverse portion 711, and the angle between the second fixed portion 72 and the inclined portion 712 is an acute angle.

[0154] In one embodiment, the number of dynamic contacts 11 is at least two, and each dynamic contact 11 is arranged and connected in parallel along a direction perpendicular to the extension direction of the dynamic contact 11 and the axial direction of the coil body 211; the number of second elastic members 7 is multiple and corresponds one-to-one to each dynamic contact 11, and two adjacent second elastic members 7 are connected to each other in a direction perpendicular to the extension direction of the dynamic contact 11 and the axial direction of the coil body 211; the two adjacent dynamic contacts 11 are suitable for generating relative displacement along the movement direction of the dynamic contact 11 based on the elastic deformation ability of the connecting part 713 of the two second elastic members 7.

[0155] The technical solution of this embodiment will be described below by taking the example that the number of the movable contacts 11 is two.

[0156] The two dynamic contacts 11 are spaced apart along the thickness direction of the relay, as shown in FIG3 . The direction facing the reader is defined as the front, and the direction away from the reader is defined as the rear. FIG3 shows the dynamic contact 11 located in the front, and the dynamic contact 11 located in the rear is blocked by the dynamic contact 11 located in the front. As shown in FIG27 , the number of second elastic members 7 is the same as the number of dynamic contacts 11. The connecting portion 713 between the second elastic portions 71 of the two second elastic members 7 is integrally formed with the two second elastic portions 71. The connecting portion 713 is located in the middle of the second elastic portions 71. The area of ​​the connecting portion 713 is relatively small. The two second elastic portions 71 have a gap between the two sides of the connecting portion 713, so that the area of ​​the connecting portion 713 in the middle of the two second elastic portions 71 is relatively small and has a certain degree of deformation ability, ensuring that the two dynamic contacts 11 can produce relative displacement and adaptive adjustment along the direction of movement of the dynamic contact 11.

[0157] Specifically, there may be manufacturing errors and assembly errors between the static contact 121 and the moving contact 111, and there may be arcing losses during use, which may cause the contact gaps between the two moving contacts 11 and the static contact 12 to be inconsistent. In this case, if the two moving contacts 11 always remain in the same vertical plane, then there may be a problem that the moving contact 111 of one of the moving contacts 11 is in contact with the static contact 121, while the moving contact 111 of the other moving contact 11 is not in contact with the static contact 121. In other words, the consistency of the on-off coordination of the two moving contacts 11 and the static contact 12 is different, and the contact pressure may also be different.

[0158] In this embodiment, by providing the second elastic member 7, the connecting portion 713 in the middle of the two second elastic portions 71 has a smaller area and has a certain deformation capacity, allowing the two moving contacts 11 to be appropriately displaced along the height direction D1 of the relay, and the moving contact 11 located in the front moves downward and the moving contact 11 located in the rear moves upward, or the moving contact 11 located in the front moves upward and the moving contact 11 located in the rear moves downward, forming a self-balancing effect, so that both moving contacts 11 can reliably contact the corresponding static contacts 121 and maintain a considerable contact pressure.

[0159] The relay also includes a third elastic member, which is mounted on the base 3 and located on the side of the push member 5 away from the static contact 12. When the dynamic contact 11 is in the open position, the third elastic member abuts against the push member 5 to store energy and causes the dynamic contact 11 to tend to move toward the closed position.

[0160] When the dynamic contact 11 moves to the open position, the pushing member 5 abuts against the third elastic member, causing the third elastic member to elastically deform and store energy. When the dynamic contact 11 starts to move toward the closed position, the third elastic member releases energy and quickly pushes the dynamic contact 11 toward the static contact 12, shortening the closing time and improving the response speed.

[0161] The present invention also provides an IoT meter, which includes the relay provided in the aforementioned embodiment and inherits all the advantages thereof.

[0162] Finally, it should be noted that: it is understandable that the various embodiments / implementations provided in the present disclosure can be combined with each other without causing any contradiction, and they will not be illustrated one by one here.

[0163] In the disclosed embodiments, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless expressly limited otherwise. Terms such as "installed," "connected," "connected," and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; "connected" can mean a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in the disclosed embodiments can be understood according to the specific circumstances.

[0164] In the description of the disclosed embodiments, it should be understood that the terms "up", "down", "left", "right", "front", "back", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the disclosed embodiments and simplifying the description, and do not indicate or imply that the device or unit referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on the disclosed embodiments.

[0165] Throughout this specification, terms such as "one embodiment," "some embodiments," and "specific embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the disclosed embodiments. Throughout this specification, schematic representations of these 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 any one or more embodiments or examples.

[0166] The above are merely preferred embodiments of the disclosed embodiments and are not intended to limit the disclosed embodiments. Those skilled in the art will readily appreciate that various modifications and variations of the disclosed embodiments are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the disclosed embodiments shall be included within the scope of protection of the disclosed embodiments.

Claims

1. A relay, characterized in that: include: Contact part, including dynamic contact and static contact; The magnetic circuit part includes a coil assembly and an armature assembly, wherein the coil assembly includes a coil body, and the coil body drives the armature assembly to swing around a first axis through magnetic force; a swing connection member having a first end and a second end, wherein a portion of the swing connection member located between the first end and the second end is adapted to rotate about a second axis; a distance between the first end of the swing connection member and the second axis is smaller than a distance between the second end and the second axis; the swing connection member is configured such that the first end is rotated by the armature assembly, and the second end drives the movable contact member to move to a closed position or an open position during the rotation; In the closed position, the movable contact is in contact with the static contact; and in the open position, the movable contact is separated from the static contact.

2. The relay according to claim 1, wherein: The second axis is parallel to the first axis.

3. The relay according to claim 1, wherein: The dynamic contact has an extension direction, and is provided with dynamic contacts at both ends along the extension direction; there are two static contacts, and both static contacts are provided with static contacts; the static contacts on the two static contacts correspond to the dynamic contacts at both ends of the dynamic contact.

4. The relay according to claim 3, characterized in that In the disconnected position, the sum of the gaps between the two moving contacts at both ends of the moving contact and their corresponding static contacts is at least 5.5 mm.

5. The relay according to claim 3, characterized in that The number of the movable contacts is at least two, and the movable contacts are arranged in a direction perpendicular to both the extending direction and the moving direction of the movable contacts and are connected in parallel.

6. The relay according to claim 3, characterized in that The axial direction of the coil body is parallel to the action direction of the movable contact; the extension direction of the movable contact is perpendicular to the axial direction of the coil body and the first axis; the movable contact and the magnetic circuit portion are arranged along the extension direction of the movable contact.

7. The relay according to any one of claims 3 to 6, characterized in that: It also includes a pushing member; the dynamic contact member is installed on the pushing member and follows the pushing member; the second end of the swing connecting member can drive the pushing member to reciprocate in a direction parallel to the axial direction of the coil body, so that the dynamic contact member switches between the closed position and the open position.

8. The relay according to claim 7, characterized in that One of the pushing member and the swing connecting member is provided with a toggle groove, and the other is provided with a toggle portion cooperating with the toggle groove; the toggle groove has a first limiting portion and a second limiting portion arranged at intervals along the movement direction of the moving contact member; when the swing connecting member swings, the toggle portion abuts against the first limiting portion and the second limiting portion respectively.

9. The relay according to claim 8, characterized in that When the movable contact moves to the closed position, the toggle portion abuts against the first limiting portion to form a first abutting position; when the movable contact moves to the disconnected position, the toggle portion abuts against the second limiting portion to form a second abutting position; the first abutting position and the second abutting position are located on the same straight line parallel to the axial direction of the coil body.

10. The relay according to claim 9, characterized in that A swing arm is provided on the side of the armature assembly away from the coil body, and the swing arm is provided with a receiving groove, and the first end of the swing connecting member is located in the receiving groove; along the axial direction of the coil body, the receiving groove has a first groove wall and a second groove wall, and the distance between the first groove wall and the second groove wall is greater than the maximum width of the first end during the rotation process relative to the receiving groove.

11. The relay according to claim 10, characterized in that When the first groove wall or the second groove wall of the accommodating groove pushes against the first end of the swing arm, the contact between the first groove wall or the second groove wall and the first end is point contact or line contact.

12. The relay according to claim 10, characterized in that Along the axial direction of the coil body, the swing arm is located on a side of the first axis away from the static contact piece.

13. The relay according to claim 12, wherein: The armature assembly includes a first armature and a second armature, the first armature being located on a side of the second armature away from the coil body; the coil body is provided with a first yoke and a second yoke at both ends along its axial direction, the first yoke being located at one end of the coil body away from the static contact, and the second yoke being located at the other end of the coil body; Along the axial direction of the coil body, the first axis is centrally disposed between an end portion of the first yoke for mating with the armature assembly and an end portion of the second yoke for mating with the armature assembly, and the first axis is closer to a side where the static contact is located than the second axis; The strokes of the first armature and the second armature rotating toward the first yoke are equal to the strokes of the first armature and the second armature rotating toward the second yoke; along the depth direction of the accommodating groove, the height of the first groove wall is greater than the height of the second groove wall.

14. The relay according to claim 12, wherein: The armature assembly includes a first armature and a second armature, the first armature being located on a side of the second armature away from the coil body; the coil body is provided with a first yoke and a second yoke at both ends along its axial direction, the first yoke being located at one end of the coil body away from the static contact, and the second yoke being located at the other end of the coil body; Along the axial direction of the coil body, the first axis is located between an end of the first yoke for mating with the armature assembly and an end of the second yoke for mating with the armature assembly and closer to a side where the first yoke is located, and the first axis and the second axis are located at the same height; The strokes by which the first armature and the second armature rotate toward the first yoke are smaller than the strokes by which the first armature and the second armature rotate toward the second yoke.

15. The relay according to any one of claims 1 to 6, characterized in that: The swing connecting member includes a first connecting section and a second connecting section, and a second rotating shaft fixedly connected between the first connecting section and the second connecting section; the free end of the first connecting section is the first end of the swing connecting member, the free end of the second connecting section is the second end of the swing connecting member, and the central axis of the second rotating shaft is the second axis.

16. The relay according to claim 15, characterized in that The first connecting section, the second connecting section and the second rotating shaft are integrally formed.

17. The relay according to claim 7, characterized in that It also includes a base for accommodating the contact part, the magnetic circuit part and the swing connection part. The armature assembly is provided with a first rotating shaft, the first rotating shaft is rotatably connected to the base, and the central axis of the first rotating shaft is the first axis.

18. The relay according to claim 17, wherein: Also included is a first elastic member; The first elastic member is fixedly connected to the dynamic contact member; The base has a first limit surface and a second limit surface facing or opposite to each other along the movement direction of the movable contact; the first elastic member abuts against the first limit surface and the second limit surface respectively when the movable contact is in the closed position and the open position to store energy, and applies a force suitable for moving away from the static contact and a force suitable for moving toward the static contact to the movable contact respectively.

19. The relay according to claim 18, wherein: The first elastic member includes a first fixed portion and two first elastic portions; the first fixed portion is connected to the dynamic contact member; the two first elastic portions extend from both ends of the dynamic contact member along the extension direction of the dynamic contact member; the base has two groups of first limiting surfaces and second limiting surfaces corresponding to the two first elastic portions respectively.

20. The relay according to claim 19, wherein Also includes a cover, The cover body is connected to the base, and the cover body is provided with a first abutting portion; the base is provided with a second abutting portion, a first retaining wall and a second retaining wall; the first abutting portion and the second abutting portion cooperate to abut at least one of the two first elastic portions along a direction perpendicular to both the extension direction and the action direction of the dynamic contact piece; the first retaining wall and the second retaining wall are used to abut against one side of the two first elastic portions away from each other along the extension direction of the dynamic contact piece.

21. The relay according to claim 7, wherein: It also includes a second elastic member, and the pushing member is provided with a third limiting surface and a fourth limiting surface opposite to each other along the movement direction of the dynamic contact member; one end of the second elastic member abuts against the third limiting surface, and the other end of the second elastic member presses the dynamic contact member against the fourth limiting surface in the direction of the static contact member.

22. The relay according to claim 7, wherein: It also includes a third elastic member, which is installed on the base and is located on the side of the push member away from the static contact member. When the dynamic contact member is in the open position, the third elastic member abuts against the push member to store energy and makes the dynamic contact member tend to move toward the closed position.

23. The relay according to claim 17, wherein: It also includes a micro switch, which is arranged in the base, and the swing connection piece is used to trigger the micro switch.

24. A table of things, characterized in that: Comprising the relay according to any one of claims 1 to 23.

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