Relay and electricity meter

Abstract

The present disclosure relates to the technical field of electronic control devices, and in particular to a relay and an electricity meter. The relay comprises a contact portion and a magnetic circuit portion; the contact portion comprises a movable contact member and two static contact members; the movable contact member has an extension direction, and movable contacts are respectively arranged at two ends of the movable contact member in the extension direction; the two static contact members are each provided with a static contact and an electric connection end; the static contacts on the two static contact members respectively correspond to the movable contacts at the two ends of the movable contact member; the magnetic circuit portion and the contact portion are arranged in the extension direction of the movable contact member; the magnetic circuit portion comprises a coil assembly and a magnetically driven rotating member; the coil assembly comprises a coil main body, and the axial direction of the coil main body is parallel to an action direction of the movable contact member; the magnetically driven rotating member is located between the coil assembly and the movable contact member, and can be driven by a magnetic force of the coil main body to swing around a first axis in a preset swing range so as to drive the movable contact member to move to a closed position or a disconnected position; at the closed position, the movable contacts are in contact with the static contacts; and at the disconnected position, the movable contacts are separated from the static contacts.

Description

Relays and electric meters

[0001] This disclosure claims priority to Chinese patent application No. 202410161564.7 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 electric 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 load current increases, a larger contact gap is required between the contacts of the relay. However, the space for installing the relay in the existing meter case is limited in all directions. The dynamic spring assembly in the existing relay includes a dynamic spring plate, a dynamic spring lead-out terminal, and a static spring plate. The dynamic spring plate is provided with a dynamic contact. One end of the dynamic spring plate is fixedly connected to the dynamic spring lead-out terminal, and the other end is driven by the magnetic circuit part to only rotate a small angle relative to the dynamic spring lead-out terminal to contact or separate with the static contact on the static spring plate. This method cannot simultaneously meet the requirements of large gap and small volume. Summary of the Invention

[0005] The embodiments of the present disclosure provide a relay and an electric meter to achieve a larger contact gap while meeting the requirements of small-volume installation.

[0006] The relay provided by the embodiment of the present disclosure includes a contact portion and a magnetic circuit portion;

[0007] The contact portion includes a dynamic contact and two static contacts, the dynamic contact having an extension direction, and a dynamic contact point is provided at each end thereof along the extension direction; the two static contacts are each provided with a static contact point and an electrical connection end; the static contacts on the two static contacts correspond to the dynamic contacts at both ends of the dynamic contact respectively;

[0008] The magnetic circuit portion is located on one side of the movable contact piece along the extension direction of the movable contact piece, and the magnetic circuit portion includes a coil assembly and a magnetic rotating member. The coil assembly includes a coil body, and the axial direction of the coil body is parallel to the movement direction of the movable contact piece; the magnetic rotating member is located between the coil assembly and the movable contact piece, and the magnetic rotating member can be driven by the magnetic force of the coil body to swing around a first axis within a preset swing range to drive the movable contact piece to move to a closed position or an open position. 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.

[0009] According to some embodiments of the present disclosure, the static contact has a first side surface and a second side surface opposite to each other, the static contact point is arranged on the first side surface, and along the axial direction of the coil body, the end of the coil assembly facing the same side surface as the second side surface of the static contact point is located within the area from the end face of the static contact point to the second side surface of the static contact point.

[0010] According to some embodiments of the present disclosure, along the axial direction of the coil body, one end of the coil assembly facing the same direction as the second side surface of the static contact is flush with the second side surface of the static contact.

[0011] 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.

[0012] According to some embodiments of the present disclosure, there are at least two movable contacts, and the movable contacts are arranged in a direction perpendicular to an extending direction of the movable contacts and an axial direction of the coil body and are connected in parallel.

[0013] According to some embodiments of the present disclosure, both of the electrical connection ends extend away from the movable contact along the movement direction of the movable contact.

[0014] According to some embodiments of the present disclosure, the relay also includes a base for accommodating the contact part and the magnetic circuit part; the maximum distance between the two inner walls of the base opposite to each other along the axial direction of the coil body is adapted to the maximum length of the coil assembly in the axial direction of the coil body.

[0015] According to some embodiments of the present disclosure, the relay further includes a pusher;

[0016] The movable contact is installed and moves with the pusher; the magnetic rotating member can drive the pusher to reciprocate in a direction parallel to the axial direction of the coil body, so that the movable contact switches between the closed position and the open position.

[0017] According to some embodiments of the present disclosure, the relay further includes a transmission member; the transmission member has a first end and a second end, the first end is driven by the magnetic rotating member to rotate the transmission member around a second axis relative to the base, and the second end is capable of driving the moving contact member to move to the closed position or the open position, wherein the second axis is parallel to the first axis; the distance from the first end of the transmission member to the second axis is smaller than the distance from the second end of the transmission member to the second axis.

[0018] According to some embodiments of the present disclosure, one of the pushing member and the transmission member is provided with a first toggle groove, and the other is provided with a first toggle portion cooperating with the first toggle groove; the first 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 transmission member swings, the first 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 first shifting portion abuts against the first limiting portion to form a first abutting position; when the movable contact moves to the disconnected position, the first shifting 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 first swing arm is provided on the side of the magnetic rotating member away from the coil body, the first swing arm is provided with a accommodating groove, and the first end of the transmission member is located in the accommodating groove; along the axial direction of the coil body, the accommodating 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 accommodating groove.

[0021] According to some embodiments of the present disclosure, when the first groove wall and the second groove wall of the accommodating groove push against the first end, they are in point contact or line contact with the first end.

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

[0023] According to some embodiments of the present disclosure, the magnetic rotor 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 electrical connection end, 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 engaging with the magnetic rotating member and an end portion of the second yoke for engaging with the magnetic rotating member, and the first axis is closer to a side where the static contact member 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 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.

[0026] According to some embodiments of the present disclosure, the magnetic rotor 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 electrical connection end, 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 engaging with the magnetic rotating member and an end portion of the second yoke for engaging with the magnetic rotating member, 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, a second swing arm is provided on the side of the magnetic rotating part away from the coil body, and the second swing arm can drive the moving contact to move to the closed position or the open position. The position where the second swing arm is fixedly connected to the magnetic rotating part is located on the side of the first axis away from the static contact.

[0030] According to some embodiments of the present disclosure, a reinforcement portion is provided on at least one side of the position where the second swing arm is connected to the magnetic rotating member.

[0031] According to some embodiments of the present disclosure, one of the pushing member and the second swing arm is provided with a second toggle groove, and the other is provided with a second toggle portion cooperating with the second toggle groove; the second toggle groove has a third limiting portion and a fourth limiting portion arranged at intervals along the movement direction of the moving contact member; when the moving contact member moves to the closed position, the second toggle portion abuts against the third limiting portion and forms a third abutting position; when the moving contact member moves to the disconnected position, the second toggle portion abuts against the fourth limiting portion and forms a fourth abutting position; the third abutting position and the fourth abutting position are located on the same straight line parallel to the axial direction of the coil body.

[0032] According to some embodiments of the present disclosure, the third limiting portion is provided with a first circular arc guide surface, which protrudes away from the fourth limiting portion, and the fourth limiting portion is provided with a second circular arc guide surface, which protrudes away from the third limiting portion. The shape of the projection of the second toggle portion in the set plane is circular, wherein the set plane is a plane that is simultaneously parallel to the extension direction of the moving contact piece and the axial direction of the coil body; when the moving contact piece moves to the closed position, the second toggle portion abuts against the first circular arc guide surface and forms a third abutment position; when the moving contact piece moves to the disconnected position, the second toggle portion abuts against the second circular arc guide surface and forms a fourth abutment position.

[0033] According to some embodiments of the present disclosure, the relay further includes a first elastic member; the first elastic member is fixedly connected to the moving contact;

[0034] 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 piece; the first elastic piece abuts against the first limit surface and the second limit surface respectively when the movable contact piece is in the closed position and the open position to store energy, and applies a force to the movable contact piece that can move away from the static contact piece and a force that can move toward the static contact piece respectively.

[0035] According to some embodiments of the present disclosure, the base is provided with a first limiting column and a second limiting column; the first limiting column and the second limiting column are spaced apart from each other along the movement direction of the dynamic contact member and their facing surfaces constitute the second limiting surface and the first limiting surface respectively.

[0036] According to some embodiments of the present disclosure, the base is provided with a protrusion; the protrusion forms a first limiting surface and a second limiting surface on both sides along the movement direction of the dynamic contact member respectively; the end of the first elastic member is provided with a guide hole, and the first elastic member is sleeved on the outside of the protrusion through the guide hole.

[0037] According to some embodiments of the present disclosure, adapter plates are respectively provided at both ends of the first elastic member, and the guide hole is provided on the adapter plates.

[0038] 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.

[0039] According to some embodiments of the present disclosure, the relay also includes a cover body, which is fixedly 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 moving contact; the first retaining wall and the second retaining wall are used to abut against the sides of the two first elastic portions away from each other along the extension direction of the moving contact.

[0040] According to some embodiments of the present disclosure, the ends of the two first elastic parts are each provided with a bending part; the outer side surface of the bending part can abut against the first retaining wall or the second retaining wall.

[0041] According to some embodiments of the present disclosure, the relay 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 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.

[0042] According to some embodiments of the present disclosure, the second elastic member includes a second fixing portion and a second elastic portion, the second fixing portion is connected to the dynamic contact member, and the second elastic portion abuts against the third limiting surface.

[0043] According to some embodiments of the present disclosure, the number of the dynamic contact members is at least two, and each of the dynamic contact members is arranged and connected in parallel in a direction perpendicular to the extension direction of the dynamic contact member and the axial direction of the coil body; the number of the second elastic members is multiple and corresponds one-to-one to at least two of the dynamic contact members, and two adjacent second elastic members are connected to each other in a direction perpendicular to the extension direction of the dynamic contact member and the axial direction of the coil body; the two adjacent dynamic contact members can produce relative displacement along the movement direction of the dynamic contact member based on the elastic deformation ability of the connecting parts of the corresponding two second elastic members.

[0044] According to some embodiments of the present disclosure, the relay further includes a third elastic member, which is mounted on the base and located on a side of the pushing member away from the static contact member. When the moving contact member is in the disconnected 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.

[0045] According to some embodiments of the present disclosure, the relay further includes a micro switch, which is disposed in the base, and the transmission member is used to trigger the micro switch.

[0046] According to some embodiments of the present disclosure, the relay further includes a micro switch, which is disposed in the base, and the second swing arm is used to trigger the micro switch.

[0047] According to some embodiments of the present disclosure, the magnetic rotating part includes a first armature, a second armature and a magnet, and a recessed portion is provided on the side of the first armature and the second armature facing each other, and the magnet is fixedly installed in the space formed between the two opposite recessed portions.

[0048] According to another aspect of the present disclosure, an electric meter includes the relay described in the present disclosure.

[0049] According to some embodiments of the present disclosure, the electric meter further includes a case having a height direction; the relay is installed in the case, and the extension direction of the electrical connection end is consistent with the height direction of the case.

[0050] According to some embodiments of the present disclosure, the magnetic circuit portion is located in the middle of the watch case.

[0051] After long-term observation, testing, and research, the inventors of the present disclosure have discovered that the main reason why relays in the prior art cannot simultaneously achieve a large contact gap and a small volume is that when the movable contact on the movable spring needs to form a large contact gap with the static contact on the static spring, the movable end of the movable spring needs to rotate through a large angle, and the armature assembly in the magnetic circuit portion needs to swing through a large angle to drive the movable spring to deform, which will lead to an increase in the magnetic spacing. In order to achieve a closed state, the power consumption needs to increase exponentially, and the volume of the magnetic circuit portion will also increase. In addition, an excessively large deformation angle of the movable spring will also have the following effects: ① The reaction force generated by the movable spring is large, and the armature assembly cannot overcome the reaction force and swing, resulting in the movable contact and the static contact not being able to close or open normally; ② The movable spring itself has high stress and is prone to yielding, resulting in permanent deformation of the movable spring; ③ A large gap similar to a trumpet is formed between the movable contact and the static contact, which easily causes the arc to deviate from the contact, affecting the life and performance of the relay.

[0052] Based on this, one embodiment disclosed above has at least the following advantages or beneficial effects:

[0053] 1. In the relay provided by the embodiments of the present disclosure, since the movable contact is provided with movable contacts at both ends of the movable contact along its extension direction, forming a structure in which the movable contacts at both ends of the movable contact are connected in series, when the magnetic rotating member (equivalent to the armature assembly) drives the movable contact to reciprocate along its operating direction, the movable contacts at both ends of the movable contact can simultaneously contact or separate with their corresponding static contacts. During this movement, the movable contact generally reciprocates and translates along its operating direction, and no bell-shaped gap is formed between the movable contact and the static contact, thereby improving the performance and life of the relay.

[0054] When the moving contact is in the disconnected position, the contact gap between the two moving contacts of the moving contact and the two static contacts can be twice the gap between a single moving contact and the corresponding static contact, thereby increasing the contact gap when the moving contact has a small movement stroke. This can reduce the size of the relay along the movement direction of the moving contact, and the resulting contact gap can even reach 5.5mm, meeting the requirements of the new standard for State Grid smart IoT meters.

[0055] Both electrical connections of the static contact extend in the direction of motion of the moving contact, away from the moving contact. In practical applications, the static contact can be positioned toward the edge of the relay housing, with both electrical connections extending directly from the same edge of the relay housing, thus reducing copper loss. Furthermore, because the layout of the two electrical connections utilizes the extension direction of the moving contact, a larger spacing exists between them, allowing for the installation of a transformer on the electrical connections without increasing metal usage.

[0056] At the same time, since the dynamic contact occupies a large space in its extension direction, setting the extension direction of the dynamic contact to be perpendicular to the extension direction of the electrical connection end can reduce the size of the relay along the extension direction of the electrical connection end, thereby reducing the space occupied by the relay in this direction inside the meter case.

[0057] In addition, the magnetic circuit part and the contact part in the embodiment of the present disclosure are arranged compactly, which is also conducive to achieving miniaturization. Specifically, the embodiment of the present disclosure sets the magnetic circuit part on one side of the contact part, and the magnetic circuit part and the contact part are arranged along the extension direction of the moving contact piece. On the one hand, it can further reduce the size of the extension direction of the electrical connection end, and on the other hand, it can ensure that the magnetic circuit part does not interfere with the movement of the moving contact piece, which is conducive to achieving a large gap between the moving contact and the static contact.

[0058] At the same time, the embodiment of the present disclosure also sets the axis of the coil body in the magnetic circuit part to be parallel to the movement direction of the moving contact piece. On the one hand, it enables the magnetic rotating part to be set on the side close to the moving contact piece, which is easier to drive and reduces the space occupied by the coil body in the extension direction of the moving contact piece. On the other hand, it utilizes the height of the coil assembly so that the moving contact piece in the contact part has sufficient space for movement in its movement direction, which is conducive to achieving a large gap between the moving contact and the static contact.

[0059] 2. The coil assembly and the second side surface of the static contact are arranged with the same end facing each other in the area between the end surface of the static contact and the second side surface of the static contact. This can maximize the size of the coil assembly and improve the magnetic efficiency while meeting the installation requirements of the static contact without additionally increasing the height dimensions of the relay.

[0060] 3. After the height dimension of the relay is adapted to the axial dimension of the coil assembly along the coil body, the height dimension of the relay is minimized from being significantly increased to achieve miniaturization.

[0061] 4. There must be at least two moving contacts, each arranged in parallel and perpendicular to the direction of their extension and the axis of the coil body. When the contacts are closed, a multi-point parallel structure is formed, which acts as a current divider. This helps reduce temperature rise near the contacts and the electrodynamic repulsion between the moving and stationary contacts. Furthermore, the parallel connection of two adjacent moving contacts reduces the overall contact resistance, thus meeting relay performance requirements.

[0062] 5. With the help of the lever amplification principle, by controlling the length ratio of the first connecting section and the second connecting section, a certain stroke amplification ratio is controlled, the small rotation stroke of the magnetic rotating part is amplified, and the possibility of realizing a large stroke (not less than 5.5mm) of the disconnection and closing of the contact part is increased, which is further conducive to realizing a large contact gap between the dynamic contact and the static contact in a smaller space. In addition, the magnetic gap of the magnetic circuit part and the optimal design of the stroke matching can be controlled to ensure magnetic efficiency, and the cost and volume can also be controlled at the best solution.

[0063] In summary, the relay provided by the embodiment of the present disclosure can achieve a larger contact gap while meeting the requirements of small-volume installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] FIG1 is a schematic diagram showing the three-dimensional structure of a relay provided in an embodiment of the present disclosure;

[0065] FIG2 is a schematic diagram of a three-dimensional exploded structure of a relay provided in an embodiment of the present disclosure;

[0066] FIG3 shows a schematic diagram of the internal structure of a relay provided in an embodiment of the present disclosure;

[0067] FIG4 is a schematic diagram showing a dynamic contact in a closed position in a relay provided by an embodiment of the present disclosure;

[0068] FIG5 shows a partial enlarged view of point Ⅰ in FIG4;

[0069] FIG6 is a schematic diagram showing a dynamic contact in a relay provided by an embodiment of the present disclosure in an open position;

[0070] FIG7 shows a partial enlarged view of point II in FIG6;

[0071] FIG8 shows a cross-sectional view of a relay provided in an embodiment of the present disclosure;

[0072] FIG9 shows a partial enlarged view of point III in FIG8 ;

[0073] 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);

[0074] 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);

[0075] FIG12 is a schematic structural diagram of a magnetic rotating member in the relay shown in FIG11 ;

[0076] 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);

[0077] FIG14 shows a partial enlarged view of point IV in FIG13;

[0078] FIG15 is a schematic structural diagram of a base in a relay provided in an embodiment of the present disclosure;

[0079] FIG16 is a schematic structural diagram of a magnetic rotating member in the relay shown in FIG13 ;

[0080] FIG17 shows a top view of the magnetic rotating member shown in FIG16;

[0081] FIG18 is a schematic structural diagram of a first armature in a relay provided in an embodiment of the present disclosure;

[0082] FIG19 shows a schematic structural diagram of a transmission member in a relay provided in an embodiment of the present disclosure;

[0083] FIG20 is a schematic structural diagram of a fourth relay provided by an embodiment of the present disclosure (the moving contact is in a closed position);

[0084] FIG21 is a schematic structural diagram of a fourth relay provided by an embodiment of the present disclosure (the moving contact is in the disconnected position);

[0085] FIG22 is a schematic diagram showing the structure of the magnetic rotating member and the second swing arm in the relay shown in FIG21 ;

[0086] 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;

[0087] FIG24 is a longitudinal cross-sectional view showing the cooperation between 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;

[0088] 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;

[0089] FIG26 shows a front view of a second elastic member in a relay provided in an embodiment of the present disclosure;

[0090] FIG27 is a schematic structural diagram of a second elastic member in a relay provided in an embodiment of the present disclosure;

[0091] FIG28 is a schematic structural diagram of the first elastic member in the relay shown in FIG13 ;

[0092] FIG29 shows a schematic diagram of the internal structure of the electric meter provided in an embodiment of the present disclosure.

[0093] The reference numerals are as follows: 1-contact portion; 11-moving contact piece; 111-moving contact point; 12-stationary contact piece; 121-stationary contact point; 13-electrical connection terminal; 2-magnetic circuit portion; 21-coil assembly; 211-coil body; 212-first yoke; 213-second yoke; 22-magnetic rotating member; 221-fixed member; 2211-first rotating shaft; 222-first armature; 2221-recessed portion; 223-second armature; 224-magnetic steel; 225-first swing arm; 2251-first slot wall; 2252-second slot wall; 226-second swing arm; 2261-third limiting portion; 2261a-first circular arc guide surface; 2262-fourth limiting portion; 2262a-second circular arc guide surface; 3-base; 30a-first limiting surface; 30b-second limiting surface; 31-first axial hole; 32-second axial hole; 33-first limiting post; 34-second limiting post; 35-protrusion; 36-first retaining wall; 37-first boss; 4-transmission 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; 641-stop plate; 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; 20-third elastic member; 100-case DETAILED DESCRIPTION

[0094] 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.

[0095] Referring to Figures 1 to 29 , 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 movable 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.

[0096] This embodiment provides a relay, including a contact portion 1 and a magnetic circuit portion 2; the contact portion 1 includes a moving contact 11 and two static contacts 12, the moving contact 11 has an extension direction, and moving contacts 111 are respectively provided at both ends along the extension direction of the moving contact 11; the two static contacts 12 are both provided with static contacts 121 and electrical connection ends 13; the static contacts 121 on the two static contacts 12 respectively correspond to the moving contacts 111 at both ends of the moving contact 11, and the electrical connection ends 13 are used to lead outward and can be used for installing an external mutual inductor, and the two electrical connection ends 13 both extend away from the moving contact 11 along the action direction of the moving contact 11.

[0097] The magnetic circuit portion 2 is located on one side of the movable contact 11 along the extension direction of the movable contact 11. The magnetic circuit portion 2 includes a coil assembly 21 and a magnetic rotor 22. The coil assembly 21 includes a coil body 211. The axial direction of the coil body 211 is parallel to the movement direction of the movable contact 11. Along the length direction D2 of the relay, the magnetic rotor 22 is located between the coil assembly 21 and the movable contact 11. Driven by the magnetic force of the coil body 211, the magnetic rotor 22 can swing about a first axis within a preset swing range to drive the movable contact 11 to move to a closed position or an open position. In the closed position, the movable contact 111 contacts the stationary contact 121. In the open position, the movable contact 111 separates from the stationary contact 121. The preset swing range refers to the range between the position of the magnetic rotor 22 when the movable contact 11 is in the closed position and the position of the magnetic rotor 22 when the movable contact 11 is in the open position. The moving contact 11 has a bidirectional movement direction, which refers to the direction in which the moving contact 111 and the static contact 121 move toward and away from each other.

[0098] In the relay provided by this embodiment, the moving contact 11 is respectively provided with moving contacts 111 at both ends along its extension direction, forming a structure in which the moving contacts 111 at both ends of the moving contact 11 are connected in series. When the magnetic rotating member 22 drives the moving contact 11 to reciprocate along its action direction, the two moving contacts 111 can simultaneously contact or separate with their corresponding static contacts 121. During the movement, the moving contact 11 generally reciprocates along its action direction, and no bell-shaped gap is formed between the moving contact 111 and the static contact 121, which can improve the contact efficiency. Performance and life of the relay; when the moving contact 11 is in the disconnected position, the contact gap between the two moving contacts 111 at both ends of the moving contact 11 and the two static contacts 12 can be twice the gap between a single moving contact 111 and the static contact 121, thereby increasing the contact gap when the movement stroke of the moving contact 11 is small, thereby reducing the size of the relay along the movement direction of the moving contact 11, and the resulting contact gap can even reach 5.5mm, meeting the requirements of the new standard of the State Grid smart IoT meter.

[0099] At the same time, since the dynamic contact 11 occupies a large space in its extension direction, setting the extension direction of the dynamic contact 11 to be perpendicular to the extension direction of the electrical connection end 13 can reduce the size of the relay along the extension direction of the electrical connection end 13, thereby reducing the space occupied by the relay in this direction inside the meter case.

[0100] In addition, the magnetic circuit portion 2 and the contact portion 1 in this embodiment are arranged compactly, which is also conducive to miniaturization. Specifically, in this embodiment, the magnetic circuit portion 2 is arranged on one side of the contact portion 1, and the magnetic circuit portion 2 and the contact portion 1 are arranged along the extension direction of the moving contact 11. On the one hand, it can further reduce the size of the electrical connection end 13 in the extension direction. On the other hand, it can ensure that the magnetic circuit portion 2 does not interfere with the movement direction of the moving contact 11, which is conducive to achieving a large gap between the moving contact 111 and the static contact 121.

[0101] At the same time, this embodiment also sets the axis of the coil body 211 in the magnetic circuit part 2 to be parallel to the movement direction of the moving contact 11. On the one hand, it enables the magnetic rotating part 22 to be set on the side close to the moving contact 11, which is easier to drive and reduces the space occupied by the coil body 211 in the extension direction of the moving contact 11. On the other hand, it utilizes the height of the coil assembly 21 so that the moving contact 11 in the contact part 1 has sufficient space for movement in its movement direction, which is conducive to achieving a large gap between the moving contact 111 and the static contact 121.

[0102] In summary, the relay provided in this embodiment can achieve a larger contact gap while meeting the requirements of small-volume installation.

[0103] The relay provided in this embodiment can be installed in the case 100 of an electric meter. Since the axis of the coil assembly 21 is consistent with the lead-out direction of the electrical connection terminal 13, the space in the height direction of the relay can be fully utilized; since the magnetic circuit portion 2 and the contact portion 1 are arranged along the extension direction of the movable contact 11, the magnetic rotating member 22 is located between the coil assembly 21 and the contact portion 1, which can fully utilize the space in the length direction of the relay; when the coil assembly 21 is energized, the magnetic rotating member 22 rotates around the first axis, causing the movable contact 111 to contact or separate from the static contact 121.

[0104] At the same time, since the contact part 1 adopts a structure in which the moving contacts 111 at both ends of the moving contact piece 11 are connected in series, a large gap design can be achieved. The total contact gap between the moving contact piece 11 and the static contact piece 121 is equal to the sum of the gaps between the two moving contacts 111 at both ends of the moving contact piece 11 and their respective corresponding static contacts 121, thereby reducing the movement stroke and helping to reduce the height dimension of the relay.

[0105] In addition, the two electrical connection terminals 13 are directly led out along the height direction of the relay, and can meet a larger spacing without bending, and can be used for installation of external mutual inductors, which can maximize the savings in metal material usage and achieve the lowest cost design while meeting the requirements of large contact gap and small volume.

[0106] Exemplarily, the material of the electrical connection end 13 is copper.

[0107] In this embodiment, referring to Figures 2 and 3, the relay further includes a base 3 and a cover 9, the cover 9 is fixedly connected to the base 3, the magnetic circuit portion 2 and the contact portion 1 are both installed in the space formed by the base 3 and the cover 9, one end of the electrical connection terminal 13 is connected to the static contact 12, and the other end of the electrical connection terminal 13 extends from the side wall of the base 3 to the outside of the base 3 for connection to the corresponding position of the electric meter.

[0108] The static contact 12 is plate-shaped and has two opposing first and second side surfaces along the direction of movement of the dynamic contact 11. The first side surface faces the dynamic contact 11, the static contact 121 is disposed on the first side surface, and the second side surface is spaced away from the dynamic contact 11. In one embodiment, along the axial direction of the coil body 211, the end of the coil assembly 21 that faces the same second side surface as the static contact 12 is located within the region extending from the end surface of the static contact 121 to the second side surface of the static contact 12. Arranging the end of the coil assembly 21 that faces the same second side surface as the static contact 12 within the region extending from the end surface of the static contact 121 (i.e., the end surface for contact with the dynamic contact 111) to the second side surface of the static contact 12 allows the size of the coil assembly 21 to be maximized while ensuring the installation of the static contact 12, thereby improving magnetic efficiency without increasing the height dimensions of the relay.

[0109] In one embodiment, along the axial direction of the coil body 211, the coil assembly 21 and the second side surface of the static contact 12 face the same end and are flush with the second side surface of the static contact 12, so that both the coil assembly 21 and the static contact 12 can be rested on the side wall of the base 3, reducing the size occupied in the height direction D1.

[0110] In one embodiment, the maximum distance between two inner walls of the base 3 that are opposite to each other in the axial direction of the coil body 211 is adapted to the maximum length of the coil assembly 21 in the axial direction of the coil body 211 .

[0111] Since the axial dimension of the coil assembly 21 basically determines the maximum dimension of the internal structure of the relay in the height direction D1, that is, after the maximum distance between the two inner walls of the base 3 facing each other along the axial direction of the coil body 211 is adapted to the axial dimension of the coil assembly 21 along the coil body 211, the dimension of the height direction D1 of the relay is not significantly increased as much as possible to achieve miniaturization.

[0112] 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.

[0113] 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 on the dynamic contact 11 and their corresponding static contacts 121 when the dynamic contact 11 and the static contact 12 are in the disconnected state.

[0114] In some embodiments, the number of dynamic contact members 11 is one, and correspondingly, the number of dynamic contact points 111 is two, that is, a dynamic contact point 111 is provided at each end of the dynamic contact member 11. When the dynamic contact member 11 and the static contact member 12 are disconnected, the gaps between the two dynamic contacts 111 of the dynamic contact member 11 and their corresponding static contacts 121 are both 3 mm. Then, the total contact gap between the dynamic contact member 11 and the static contact member 12 is 6 mm. The movement stroke of the dynamic contact member 11 relative to the static contact member 12 is small, but it can meet the requirements of the new standard of the State Grid smart IoT meter.

[0115] 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.

[0116] In one embodiment, there are at least two movable contacts 11, each arranged in parallel and perpendicular to the extension direction of the movable contact 11 and the axial direction of the coil body 211. When the contact portion 1 is closed, a multi-contact parallel structure is formed, which acts as a current divider. This helps reduce temperature rise near the contacts and the electrokinetic repulsive force between the movable contact 111 and the stationary contact 121. Furthermore, the parallel connection of two adjacent movable contacts 11 reduces the total contact resistance, thereby meeting relay performance requirements.

[0117] In this embodiment, as shown in Figure 23, the number of dynamic contact pieces 11 is two, and accordingly, the number of dynamic contacts 111 is four, and there are four groups of dynamic and static contacts. When the four groups of dynamic and static contacts are subjected to high load current or voltage, 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.

[0118] In other embodiments, the number of the dynamic contacts 11 may be three or more.

[0119] In one embodiment, referring to Figures 6 and 16, the magnetic rotating member 22 includes a fixed member 221 and a first armature 222 and a second armature 223 partially enclosed in the fixed 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 between one end of the first armature 222 away from the static contact member 12 and one end of the second armature 223 away from the static contact member 12, and the second yoke 213 is located between one end of the first armature 222 close to the static contact member 12 and one end of the second armature 223 close to the static contact member 12.

[0120] As shown in Figures 4 and 6, in the embodiment provided in the present application with a transmission member 4 (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.

[0121] In this embodiment, as shown in Figure 20, the magnetic rotating part 22 also includes a magnet 224, which is arranged between the first armature 222 and the second armature 223 and fixed together by the fixing part 221. The magnet 224 itself is magnetic and enables the magnetic circuit part 2 to have a magnetic holding function. Exemplarily, the fixing part 221 can be an injection molded part, which covers the first armature 222, the second armature 223 and the magnet 224 to form a whole. Both ends of the first armature 222 and the second armature 223 are located outside the injection molded part to facilitate attraction with the first yoke 212 and the second yoke 213.

[0122] As shown in Figures 18 and 20 , the facing surfaces of the first armature 222 and the second armature 223 are each provided with a recessed portion 2221. The magnet 224 is mounted in the space formed between the two opposing recessed portions 2221. This allows the volume of the magnet 224 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 volume of the magnet 224, the magnetic spacing between the armature and the 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.

[0123] It should be understood that the cooperation between the recessed portion 2221 and the magnetic steel 224 is applicable to all magnetic rotating parts 22 in this embodiment, for example, the magnetic rotating part 22 provided with the first swing arm 225 and the magnetic rotating part 22 provided with the second swing arm 226.

[0124] As shown in Figures 2 and 3 , the relay also includes a mounting bracket 10, which is fixedly mounted on the base 3 and is provided with a through-hole. As shown in Figures 15 and 16 , the fixing member 221 is provided with a first rotating shaft 2211, the axis of which is the first axis. The first rotating shaft 2211 has a first shaft portion and a second shaft portion. The base 3 is provided with a first shaft hole 31. 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 mounting bracket 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.

[0125] One end of the first yoke 212 is located between the end of the first armature 222 away from the static contact 12 and the end of the second armature 223 away from the static contact 12. One end of the second yoke 213 is located between the other end of the first armature 222 and the other end of the second armature 223. When the coil is driven by positive and negative pulse voltages, the repulsive and attractive forces between the armature and yoke enable switching between the closed and open positions.

[0126] Specifically, as shown in Figure 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. As shown in 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.

[0127] Since the first armature 222 and the second armature 223 are tightly fitted with the magnet 224, and in the attracted state, 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 magnetic rotating part 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.

[0128] In one embodiment, the relay further includes a pusher 5; the moving contact 11 is mounted on the pusher 5 and moves with the pusher 5; the magnetic rotating member 22 is capable of driving the pusher 5 to reciprocate in a direction parallel to the axial direction of the coil body 211 so that the moving contact 11 switches between a closed position and an open position.

[0129] 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.

[0130] In one embodiment, the relay further includes a transmission member 4; the transmission member 4 has a first end and a second end, the first end is driven by the magnetic rotating member 22 to rotate the transmission member 4 around the second axis relative to the base 3, and the second end is capable of driving the moving contact 11 to move to a closed position or an open position, wherein the second axis is parallel to the first axis; the distance from the first end of the transmission member 4 to the second axis is less than the distance from the second end of the transmission member 4 to the second axis.

[0131] The use of a transmission member 4 not only saves effort and improves structural strength, but also fully utilizes the internal space of the relay. Referring to Figures 4 and 19 , the transmission member 4 is a lever structure comprising a first connecting segment 41, a second connecting segment 42, and a second rotating shaft 43. The second rotating shaft 43 is located between the first connecting segment 41 and the second connecting segment 42. The end of the first connecting segment 41 away from the second rotating shaft 43 serves as the first end of the transmission member 4, while the end of the second connecting segment 42 away from the second rotating shaft 43 serves as the second end of the transmission member 4.

[0132] As shown in FIG15 , the base 3 is provided with a second axial hole 32 , into which a second rotating shaft 43 is inserted. The second rotating shaft 43 is capable of rotating about its own axis relative to the second axial hole 32 . The axis of the second rotating shaft 43 is the second axis, which is parallel to the first axis. Since the distance from the first end of the transmission member 4 to the second axis is less than the distance from the second end of the transmission member 4 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 and converting the small rotation stroke of the magnetic rotating member 22 , thereby increasing the possibility of achieving a large stroke (not less than 5.5 mm) for the opening and closing of the contact portion 1 , further facilitating the realization of a large contact gap between the dynamic contact member 11 and the static contact member 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.

[0133] In this embodiment, the second axis is parallel to the first axis, which not only ensures that the extension direction of the transmission member 4 will not occupy space in the axial direction of the first rotating shaft 2211, further facilitating the realization of 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 transmission member 4. During the rotation of the transmission member 4, it can also be more stable and smooth, and the end of the transmission member 4 will not be worn due to the tilt of the transmission member 4.

[0134] In one embodiment, one of the pusher 5 and the transmission member 4 is provided with a first toggle groove, and the other is provided with a first toggle portion that cooperates with the first toggle groove. Referring to Figures 3 and 4 , the first toggle groove has a first stopper 51 and a second stopper 52 spaced apart along the direction of movement of the movable contact member 11. When the transmission member 4 swings, the first toggle portion abuts against the first stopper 51 and the second stopper 52, respectively.

[0135] Exemplarily, when the movable contact 11 moves to the closed position, the first shifting portion abuts against the first limiting portion 51 and forms a first abutting position; when the movable contact 11 moves to the disconnected position, the first shifting 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 211.

[0136] In this embodiment, referring to Figures 4 and 6, the pushing member 5 is provided with a first toggle groove, and the transmission member 4 is provided with a first toggle portion. By controlling the transmission member 4 to move in a fan-shaped symmetrical manner, the first abutment position and the second abutment position are ensured to be 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.

[0137] In this embodiment, the first toggle groove is arranged in the pushing member 5, and the two groove walls of the first 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 transmission member 4 is located in the first 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.

[0138] Exemplarily, the second end is formed into a second columnar portion 421, and the second columnar portion 421 serves as a first toggle portion and is located in the first toggle groove. The portion of the circumferential surface of the second columnar portion 421 close to the first limiting portion 51 is a 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 a second limiting fitting portion.

[0139] In other embodiments, a first toggle portion may be provided on the pushing member 5 , and a first toggle groove may be provided at the second end of the transmission member 4 .

[0140] In one embodiment, a first swing arm 225 is provided on the side of the magnetic rotating member 22 away from the coil body 211, and the first swing arm 225 is provided with a receiving groove, and the first end of the transmission member 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.

[0141] As shown in Figures 4 and 17, the first swing arm 225 is arranged 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 first swing arm 225 is located on the side of the first axis close to the first yoke 212, that is, the first swing arm 225 is located on the side of the first axis away from the static contact member 12, and it is eccentrically arranged on the fixing member 221. The first swing arm 225 is provided with a receiving groove, and the first end of the transmission member 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 maximum width of the first end of the transmission member 4 (that is, the first columnar portion 411) during the rotation relative to the receiving groove.

[0142] For example, during the clockwise swinging of the magnetic rotating member 22 about the first axis, the first groove wall 2251 can approach and abut the first end, thereby causing 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 magnetic rotating member 22 about the first axis, the second groove wall 2252 can approach and abut the first end, thereby causing 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.

[0143] Exemplarily, the first swing arm 225 and the fixing member 221 are integrally formed. Exemplarily, the first swing arm 225 and the fixing member 221 can be integrally formed by injection molding.

[0144] 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.

[0145] 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.

[0146] Of course, the first groove wall 2251 or the second groove wall 2252 of the accommodating groove may also be in point contact with the first end.

[0147] In one embodiment, along the axial direction of the coil body 211 , the first swing arm 225 is located on a side of the first axis away from the static contact 12 .

[0148] In this embodiment, the transmission member 4 is arranged within the overlapping space between the magnetic circuit portion 2 and the contact portion 1 in the length direction D2 and height direction D1, achieving the most space-saving solution. Specifically, referring to Figure 4 , the transmission member 4 is arranged to the left of the magnetic circuit portion 2 and above the contact portion 1, fully utilizing the internal space of the relay. In this case, the first swing arm 225 is configured as an eccentric structure, allowing the transmission member 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.

[0149] In one design, as shown in Figures 6 and 16 , along the axial direction of the coil body 211, the first axis is centrally located between the end of the first yoke 212 for mating with the magnetic rotating member 22 and the end of the second yoke 213 for mating with the magnetic rotating member 22, and the first axis is closer to the side where the static contact member 12 is located than the second axis; the stroke of the first armature 222 and the second armature 223 respectively rotating toward the first yoke 212 is equal to the stroke of the first armature 222 and the second armature 223 respectively rotating toward the second yoke 213; 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. Specifically, 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.

[0150] Since the first swing arm 225 is an eccentric structure relative to the first axis, the movement of the first swing arm 225 will present an asymmetric fan-shaped motion. Therefore, the first 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 in the accommodating groove. When the magnetic rotating part 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 to prevent the first columnar portion 411 from escaping from 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 the lateral deflection to affect the reliability of the contact part 1.

[0151] 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 magnetic rotating member 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 magnetic rotating member 22 and the end of the second yoke 213 for mating with the magnetic rotating member 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 magnetic rotating member 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.

[0152] 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 magnetic rotating member 22 and the end of the second yoke 213 for cooperating with the magnetic rotating member 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.

[0153] Specifically, the first rotating shaft 2211 is positioned away from the center of the magnetic rotating member 22 to ensure that the plane where the axis of the first rotating shaft 2211 and the axis of the second rotating shaft 43 lie is parallel to the extending direction of the dynamic contact member 11 . At the same time, in order to ensure that the transmission member 4 exhibits symmetrical fan-shaped motion, and thus ensure 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, the first armature 222 and the second armature 223 are arranged asymmetrically, as shown in Figures 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 magnetic rotating member 22 rotates around the first axis at a set angle, the strokes of the first armature 222 and the second armature 223 respectively rotating toward the first yoke 212 are smaller than the strokes of the first armature 222 and the second armature 223 respectively rotating toward 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.

[0154] 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 magnetic rotating part 22, and then adjust the angle between the pole surface and the center line of the first armature 222 and the second armature 223.

[0155] 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.

[0156] 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 .

[0157] It should also be noted that a protrusion can be provided on the first swing arm 225 and a groove can be provided on the first end of the transmission member 4, with the protrusion located in the groove of the transmission member 4, and the two move in coordination.

[0158] In this embodiment, referring to FIG. 1 and FIG. 2 , the relay further includes a micro switch 8 . The micro switch 8 is disposed in the base 3 , and the transmission member 4 can be used to trigger the micro switch 8 .

[0159] In the third design, the transmission member 4 may not be provided. In this case, the second swing arm 226 may be used to replace the first swing arm 225 .

[0160] In this third design, as shown in Figures 20 to 22, a second swing arm 226 is provided on the side of the magnetic rotating member 22 away from the coil body 211. The second swing arm 226 can drive the dynamic contact member 11 to move to a closed position or an open position. Along the axial direction of the coil body 211, the position where the second swing arm 226 is fixedly connected to the magnetic rotating member 22 is located on the side of the first axis away from the static contact member 12.

[0161] Exemplarily, a second swing arm 226 is provided on the side of the magnetic rotating member 22 away from the coil body 211, and the position where one end of the second swing arm 226 is fixedly connected to the magnetic rotating member 22 is located on the side of the first axis away from the static contact member 12, and the other end of the second swing arm 226 can drive the pushing member 5 to reciprocate in a direction parallel to the axial direction of the coil body 211 so that the dynamic contact member 11 switches between the closed position and the open position.

[0162] In this embodiment, the second swing arm 226 and the fixing part 221 are integrally formed, and the magnetic rotating part 22 with an integrated long swing arm is used, which can reduce the number of parts, improve assembly efficiency, reduce the cumulative error of matching, and improve the push-pull stroke accuracy.

[0163] In the third design, a reinforcement portion is provided on at least one side of the position where the second swing arm 226 is connected to the magnetic rotating member 22 .

[0164] Specifically, the joint where the second swing arm 226 and the fixing part 221 are integrally formed is widened so that the width of the joint is greater than the width of the second swing arm 226. The widened part forms a reinforcement part to increase the mechanical strength of the second swing arm 226 and prevent fatigue fracture during multiple swinging and dialing.

[0165] In this third design, one of the pusher 5 and the second swing arm 226 is provided with a second toggle groove, and the other is provided with a second toggle portion cooperating with the second toggle groove; the second toggle groove has a third limiting portion 2261 and a fourth limiting portion 2262 arranged at intervals along the movement direction of the moving contact 11; when the moving contact 11 moves to the closed position, the second toggle portion abuts against the third limiting portion 2261 and forms a third abutting position; when the moving contact 11 moves to the disconnected position, the second toggle portion abuts against the fourth limiting portion 2262 and forms a fourth abutting position; the third abutting position and the fourth abutting position are located on the same straight line parallel to the axial direction of the coil body 211.

[0166] Exemplarily, the pusher 5 is provided with a second toggle portion, which can be a toggle lever 53. The second swing arm 226 is provided with a second toggle slot. The second toggle slot has a third limiting portion 2261 and a fourth limiting portion 2262. Along the axial direction of the coil body 211, the third limiting portion 2261 is arranged away from the movable contact member 11, and the fourth limiting portion 2262 is arranged close to the movable contact member 11. The toggle lever 53 is provided with a third limiting mating portion and a fourth limiting mating portion. In the closed position, the third limiting mating portion abuts the third limiting portion 2261 to form a third abutting position. In the open position, the fourth limiting mating portion abuts the fourth limiting portion 2262 to form a fourth abutting position. The third abutting position and the fourth abutting position are located on the same straight line parallel to the axial direction of the coil body 211.

[0167] Illustratively, the pusher 5 is provided with an accommodation space, and the toggle rod 53 is disposed within the accommodation space. The toggle rod 53 is cylindrical, and the axis of the toggle rod 53 is parallel to the first axis. A portion of the circumferential surface of the toggle rod 53 away from the movable contact 11 forms a third position-limiting engagement portion, and a portion of the circumferential surface of the toggle rod 53 near the movable contact 11 forms a fourth position-limiting engagement portion.

[0168] In this embodiment, a second toggle groove is provided at the free end of the second swing arm 226, and the second toggle groove has a pushing arm and a pulling arm, which are respectively located on both sides of the toggle rod 53, wherein the pushing arm is located on the side of the toggle rod 53 away from the moving contact piece 11, and the pulling arm is located on the other side; the pushing arm forms a third limiting portion 2261, and the pulling arm forms a fourth limiting portion 2262; in the closed position, the third limiting matching portion abuts against the third limiting portion 2261 to form a third abutting position; in the disconnected position, the fourth limiting matching portion abuts against the fourth limiting portion 2262 to form a fourth abutting position; the third abutting position and the fourth abutting position are located on the same straight line parallel to the axial direction of the coil body 211.

[0169] As shown in Figures 20 to 22, in this third design, the third stopper 2261 is provided with a first arcuate guide surface 2261a that protrudes away from the fourth stopper 2262. The fourth stopper 2262 is provided with a second arcuate guide surface 2262a that protrudes away from the third stopper 2261. The projection of the second toggle portion within a set plane is circular, where the set plane is a plane parallel to both the extension direction of the movable contact 11 and the axial direction of the coil body 211. That is, the second toggle portion can be cylindrical or spherical. When the movable contact 11 moves to the closed position, the second toggle portion abuts the first arcuate guide surface 2261a, forming a third abutting position. When the movable contact 11 moves to the open position, the second toggle portion abuts the second arcuate guide surface 2262a, forming a fourth abutting position.

[0170] In order to ensure that the moving contact 11 is located on the same center line when opening and closing, the second swing arm 226 of the magnetic rotating part 22 is designed to be a combination of long and short push-pull arms, that is, along the depth direction of the second toggle groove, the length of the pulling arm is greater than the length of the pushing arm, so as to compensate for the stroke asymmetry caused by the eccentric setting of the second swing arm 226, and circular arc guide surfaces are respectively provided on the pushing arm and the pulling arm, which are used to limit the relative movement of the pushing member 5 and the second swing arm 226 along the extension direction of the moving contact 11 when the second swing arm 226 pushes the pushing member 5 into place, and enable the second toggle part to adaptively adjust to the highest point of the first circular arc guide surface 2261a or the highest point of the second circular arc guide surface 2262a, so as to achieve a self-correction function, ensuring that the third abutment position and the fourth abutment position are located on the same straight line parallel to the axial direction of the coil body 211 when opening and closing, reducing the radial component caused by the conversion of rotational motion into linear motion, and improving the contact reliability of the relay.

[0171] Specifically, the length of the pulling arm is greater than that of the pushing arm, and the center of the first arc guide surface 2261a and the center of the second arc guide surface 2262a are offset, that is, the two centers are not on the same straight line parallel to the axial direction of the coil body 211.

[0172] When the push arm pushes against the toggle rod 53 and drives the movable contact 11 toward the closed position, the first circular arc guide surface 2261a can cooperate with the circumferential surface of the toggle rod 53 to guide the movement of the toggle rod 53 and reduce the movement of the toggle rod 53 in the direction along which the movable contact 11 extends. When the pull arm pulls the toggle rod 53 and drives the movable contact 11 toward the open position, the second circular arc guide surface 2262a can cooperate with the circumferential surface of the toggle rod 53 to guide the movement of the toggle rod 53 and reduce the movement of the toggle rod 53 in the direction along which the movable contact 11 extends, thereby ensuring that the toggle rod 53 can drive the closed position and the open position of the movable contact 11 to be infinitely close to the same straight line.

[0173] It should be noted that a micro switch 8 is also installed on the base 3 , and the second swing arm 226 can also be used to trigger the micro switch 8 .

[0174] 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.

[0175] 5 and 7, the base 3 has a first limiting surface 30a and a second limiting surface 30b, which are arranged opposite to each other along the direction of movement of the moving contact 11 and spaced apart from each other. In the closed position, the first limiting surface 30a limits the first elastic member 6 and causes the first elastic member 6 to elastically deform toward the static contact 12. At this time, the first elastic member 6 stores energy. When the magnetic rotating member 22 switches from the closed position to the open position, the first elastic member 6 releases energy to ensure that the moving contact 111 and the static contact Point 121 can be quickly disconnected, thereby ensuring that the arc generated is small and avoiding the arc from deviating from the contact. At the same time, after the moving contact 111 and the static contact 121 are quickly disconnected, the moving contact 11 continues to move away from the static contact 12. During this process, the first elastic member 6 can generate a reaction force, which has a buffering effect on the movement of the moving contact 11, slowing down the movement speed of the moving contact 11, and allowing the contact part 1 to stop more stably, thereby avoiding the second columnar portion 421 of the transmission member 4 from moving in the push member 5 after disconnection, thereby ensuring stable arc ablation.

[0176] In the disconnected position, the second limiting surface 30b limits the first elastic member 6 and causes the first elastic member 6 to elastically deform away from the static contact member 12. At this time, the first elastic member 6 stores energy. When the magnetic rotating member 22 switches from the disconnected position to the closed position, the first elastic member 6 releases energy to ensure that the moving contact 111 can move quickly toward the static contact member 12, thereby improving the closing response speed and shortening the contact closing time. This is crucial for controlling the closing time under a large contact gap state.

[0177] 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.

[0178] 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.

[0179] Specifically, there are two first limiting posts 33 and two second limiting posts 34. The two first limiting posts 33 are arranged relative to each other along the extension direction of the movable contact 11, and the two second limiting posts 34 are arranged relative to each other along the extension direction of the movable contact 11. Referring to Figures 4 and 5, when the movable contact 11 is in the closed position, the two second limiting posts 34 simultaneously abut against their respective corresponding first elastic portions 64, causing the first elastic member 6 to store energy and causing the movable contact 11 to have a tendency to move toward the disconnected position. Referring to Figures 6 and 7, when the movable contact 11 is in the disconnected position, the two first limiting posts 33 simultaneously abut against their respective corresponding first elastic portions 64, causing the first elastic member 6 to store energy and causing the movable contact 11 to have a tendency to move toward the closed position.

[0180] 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.

[0181] 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.

[0182] 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 .

[0183] 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 .

[0184] 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.

[0185] 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.

[0186] 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 disconnected 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.

[0187] 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 .

[0188] As shown in Figure 20, a stop plate 641 can also be provided on one side of the first elastic part 64, and the stop plate 641 can limit the stroke of the first elastic member 6. Specifically, as shown in Figure 21, the stop plate 641 can abut against the first limiting column 33 when the dynamic contact member 11 is disconnected, thereby limiting the deflection of the dynamic contact member 11 along its extension direction.

[0189] 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.

[0190] 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.

[0191] 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 holes 621 are provided on the adapter plates 62. Exemplarily, the adapter plates 62 are integrally formed with the first elastic member 6, and the guide holes 621 are oblong holes. In the above design, the first fixing portion 63 of the first elastic member 6 is fixed to the movable contact member 11 when its plate surface is attached to the surface of the movable contact member 11. In this way, since the first elastic portion 64 of the first elastic member 6 is thin in the direction of movement of the movable contact member 11, it is easy to deform and meets the elastic deformation requirements of this embodiment. On this basis, by providing the adapter plates 62 perpendicular to the plate surface of the first elastic member 6, the guide holes 621 can be formed without increasing the thickness of the main body of the first elastic member 6, thereby ensuring that the first elastic member 6 has excellent elastic deformation ability without increasing the material used for the first elastic member 6.

[0192] 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.

[0193] 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.

[0194] In this embodiment, with the support of the first elastic member 6 and the transmission member 4 or the second swing arm 226, 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.

[0195] 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.

[0196] 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.

[0197] 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 .

[0198] 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 .

[0199] The second fixing parts 72 at both ends of the second elastic member 7 are respectively fixedly connected to the two ends of the dynamic contact member 11. The part of the second elastic member 7 connected between the two second fixing parts 72 constitutes the second elastic part 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.

[0200] 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 still maintain the contact pressure after electric grinding, and when the moving contact 111 and the static contact 121 are closed, the spring force can be used for buffering and reducing bounce, 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.

[0201] 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.

[0202] 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 can produce 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.

[0203] The technical solution of this embodiment will be described below by taking the example that the number of the movable contacts 11 is two.

[0204] The two moving 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 moving contact 11 located in the front, and the moving contact 11 located in the rear is blocked by the moving contact 11 located in the front.

[0205] As shown in Figure 27, 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 in the middle position of the second elastic portion 71. The area of ​​the connecting portion 713 is 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 small and has a certain deformation ability, thereby ensuring that the two dynamic contacts 11 can produce relative displacement and adaptive adjustment along the movement direction of the dynamic contact 11.

[0206] 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.

[0207] 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.

[0208] In one embodiment, referring to Figures 20 and 21, the relay further includes a third elastic member 20, which is mounted on the base 3 and located on a side of the pusher 5 away from the static contact 12. When the dynamic contact 11 is in the open position, the third elastic member 20 abuts against the pusher 5 to store energy and causes the dynamic contact 11 to tend to move toward the closed position.

[0209] When the dynamic contact 11 moves to the open position, the pushing member 5 abuts against the third elastic member 20, causing the third elastic member 20 to elastically deform and store energy. When the dynamic contact 11 starts to move toward the closed position, the third elastic member 20 releases energy and quickly pushes the dynamic contact 11 toward the static contact 12, thereby shortening the closing time and improving the response speed.

[0210] As shown in Figure 29, this embodiment also provides an electric meter, including a meter case 100 and a relay provided in this embodiment, the meter case 100 has a height direction; the relay is installed in the meter case 100, and the lead-out direction of the electrical connection terminal 13 is consistent with the height direction of the meter case 100.

[0211] The orientation definition in this embodiment is: the left and right sides within the field of view are the left and right sides of the meter respectively; the top and bottom within the field of view are the top and bottom of the meter respectively; the side perpendicular to the paper and facing the reader is the front side of the meter, and the side away from the reader is the back side of the meter.

[0212] The electric meter provided in this embodiment can meet the requirement of large contact gap without changing the volume of the original meter case 100 because the relay provided in this embodiment is installed.

[0213] As shown in Figure 29, the height direction of the electric meter is consistent with the lead-out direction of the electrical connection terminal 13. The contact part 1 is close to the left side of the electric meter, and the magnetic circuit part 2 is far away from the left side of the electric meter relative to the contact part 1, making full use of the limited height space in the meter case 100.

[0214] In this embodiment, magnetic circuit portion 2 is located to the right of contact portion 1 and approximately in the middle of meter case 100, achieving an optimal distance from the left and right sides of the meter to resist magnetic interference. Furthermore, magnetic circuit portion 2 in this embodiment provides a complete closed magnetic loop, ensuring optimal magnetic efficiency and further reducing its size, resulting in a more compact and cost-effective design.

[0215] Since the contact portion 1 adopts a structure in which two movable contacts 111 are connected in series, a large contact gap design can be achieved. The total contact gap between the movable contact 11 and the static contact 121 is equal to the sum of the gaps between the two movable contacts 111 and their respective corresponding static contacts 121, thereby reducing the movement stroke; in addition, the electrical connection terminal 13 is directly led out along the height direction of the relay, which can maximize the use of materials (for example, copper), and achieve the lowest cost design while meeting the requirements of large contact gap and small volume.

[0216] The electric meter provided in this embodiment, due to the use of the relay provided in this embodiment, can provide ample placement area for other electronic components in the right area of ​​the electric meter, avoiding the use of more expensive small devices due to the limited size of the electric meter, thereby further reducing the cost of use.

[0217] 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.

[0218] 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.

[0219] 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.

[0220] 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.

[0221] 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: The contact portion includes a movable contact and two static contacts, wherein the movable contact has an extension direction and movable contacts are respectively provided at both ends of the movable contact along the extension direction; The two static contacts are each provided with a static contact point and an electrical connection end; the static contacts on the two static contacts correspond to the dynamic contacts at both ends of the dynamic contact respectively; The magnetic circuit portion is located on one side of the movable contact piece along the extension direction of the movable contact piece, and the magnetic circuit portion includes a coil assembly and a magnetic rotating member. The coil assembly includes a coil body, and the axial direction of the coil body is parallel to the movement direction of the movable contact piece; the magnetic rotating member is located between the coil assembly and the movable contact piece, and the magnetic rotating member can be driven by the magnetic force of the coil body to swing around a first axis within a preset swing range to drive the movable contact piece to move to a closed position or an open position. 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 static contact has a first side surface and a second side surface facing each other, the static contact point is arranged on the first side surface, and along the axial direction of the coil body, the end of the coil assembly facing the same side surface as the second side surface of the static contact point is located in the area from the end surface of the static contact point to the second side surface of the static contact point.

3. The relay according to claim 2, characterized in that Along the axial direction of the coil body, one end of the coil assembly facing the same direction as the second side surface of the static contact is flush with the second side surface of the static contact.

4. The relay according to claim 1, wherein: 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 1, wherein: 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 an axial direction of the coil body and are connected in parallel.

6. The relay according to any one of claims 1 to 5, characterized in that: The two electrical connection ends both extend in a direction away from the movable contact along the movement direction of the movable contact.

7. The relay according to any one of claims 1 to 5, characterized in that: It also includes a base for accommodating the contact portion and the magnetic circuit portion; the maximum distance between the two inner walls of the base opposite to each other along the axial direction of the coil body is adapted to the maximum length of the coil assembly in the axial direction of the coil body.

8. The relay according to claim 7, characterized in that Also included is a pusher; The movable contact is mounted on and follows the pusher; the magnetic rotating member can drive the pusher to reciprocate in a direction parallel to the axial direction of the coil body, so that the movable contact switches between the closed position and the open position.

9. The relay according to claim 8, characterized in that The relay also includes a transmission member; the transmission member has a first end and a second end, the first end is toggled by the magnetic rotating member so that the transmission member rotates around a second axis relative to the base, and the second end is capable of driving the movable contact to move to the closed position or the open position, wherein the second axis is parallel to the first axis; the distance from the first end of the transmission member to the second axis is less than the distance from the second end of the transmission member to the second axis.

10. The relay according to claim 9, characterized in that One of the pushing member and the transmission member is provided with a first toggle groove, and the other is provided with a first toggle portion cooperating with the first toggle groove; the first 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 transmission member swings, the first toggle portion abuts against the first limiting portion and the second limiting portion respectively.

11. The relay according to claim 10, characterized in that When the movable contact moves to the closed position, the first toggle portion abuts against the first limiting portion to form a first abutting position; when the movable contact moves to the disconnected position, the first 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.

12. The relay according to claim 9, characterized in that A first swing arm is provided on the side of the magnetic rotating member away from the coil body, and the first swing arm is provided with a receiving groove, and the first end of the transmission 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.

13. The relay according to claim 12, wherein: When the first groove wall and the second groove wall of the accommodating groove push against the first end, they are in point contact or line contact with the first end.

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

15. The relay according to claim 14, characterized in that The magnetic rotor includes a first armature and a second armature, wherein the first armature is 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, wherein the first yoke is located at one end of the coil body away from the electrical connection end, and the second yoke is 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 engaging with the magnetic rotating member and an end portion of the second yoke for engaging with the magnetic rotating member, and the first axis is closer to a side where the static contact member 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.

16. The relay according to claim 14, wherein: The magnetic rotor includes a first armature and a second armature, wherein the first armature is 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, wherein the first yoke is located at one end of the coil body away from the electrical connection end, and the second yoke is 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 engaging with the magnetic rotating member and an end of the second yoke for engaging with the magnetic rotating member, and is 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.

17. The relay according to claim 8, characterized in that A second swing arm is provided on the side of the magnetic rotating part away from the coil body, and the second swing arm can drive the moving contact to move to the closed position or the open position. Along the axial direction of the coil body, the position where the second swing arm is fixedly connected to the magnetic rotating part is located on the side of the first axis away from the static contact part.

18. The relay according to claim 17, wherein: A reinforcement portion is provided on at least one side of a position where the second swing arm is connected to the magnetic rotating member.

19. The relay according to claim 17, wherein: One of the pushing member and the second swing arm is provided with a second toggle groove, and the other is provided with a second toggle portion cooperating with the second toggle groove; the second toggle groove has a third limiting portion and a fourth limiting portion arranged at intervals along the movement direction of the moving contact member; when the moving contact member moves to the closed position, the second toggle portion abuts against the third limiting portion and forms a third abutting position; when the moving contact member moves to the disconnected position, the second toggle portion abuts against the fourth limiting portion and forms a fourth abutting position; the third abutting position and the fourth abutting position are located on the same straight line parallel to the axial direction of the coil body.

20. The relay according to claim 19, wherein The third limiting portion is provided with a first circular arc guide surface, which protrudes away from the fourth limiting portion, and the fourth limiting portion is provided with a second circular arc guide surface, which protrudes away from the third limiting portion. The shape of the projection of the second toggle portion in the set plane is circular, wherein the set plane is a plane that is simultaneously parallel to the extension direction of the moving contact piece and the axial direction of the coil body; when the moving contact piece moves to the closed position, the second toggle portion abuts against the first circular arc guide surface and forms a third abutting position; when the moving contact piece moves to the disconnected position, the second toggle portion abuts against the second circular arc guide surface and forms a fourth abutting position.

21. The relay according to claim 8, wherein It also includes 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 piece; the first elastic piece abuts against the first limit surface and the second limit surface respectively when the movable contact piece is in the closed position and the open position to store energy, and applies a force to the movable contact piece that can move away from the static contact piece and a force that can move toward the static contact piece respectively.

22. The relay according to claim 21, characterized in that The base is provided with a first limiting column and a second limiting column; the first limiting column and the second limiting column are spaced apart from each other along the movement direction of the movable contact member, and their surfaces facing each other constitute the second limiting surface and the first limiting surface respectively.

23. The relay according to claim 21, wherein: The base is provided with a protrusion; the protrusion forms a first limiting surface and a second limiting surface on both sides along the movement direction of the dynamic contact member; the end of the first elastic member is provided with a guide hole, and the first elastic member is sleeved on the outside of the protrusion through the guide hole.

24. The relay according to claim 23, characterized in that Adapter plates are respectively provided at both ends of the first elastic member, and the guide holes are provided on the adapter plates.

25. The relay according to claim 21, 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.

26. The relay according to claim 25, characterized in that It also includes a cover body, which is fixedly connected to the base, and the cover body is provided with a first abutment portion; the base is provided with a second abutment portion, a first retaining wall and a second retaining wall; the first abutment portion and the second abutment 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 dynamic contact piece; 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 dynamic contact piece.

27. The relay according to claim 26, characterized in that The ends of the two first elastic parts are each provided with a bent part; the outer side surfaces of the bent part can abut against the first retaining wall or the second retaining wall.

28. The relay according to claim 8, characterized in that 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.

29. The relay according to claim 28, characterized in that The second elastic member includes a second fixing portion and a second elastic portion, the second fixing portion is connected to the dynamic contact member, and the second elastic portion abuts against the third limiting surface.

30. The relay according to claim 29, characterized in that The number of the dynamic contacts is at least two, and the at least two dynamic contacts are arranged and connected in parallel in a direction perpendicular to the extension direction of the dynamic contacts and the axial direction of the coil body; the number of the second elastic members is multiple and corresponds one-to-one to at least two of the dynamic contacts, and two adjacent second elastic members are connected to each other in a direction perpendicular to the extension direction of the dynamic contacts and the axial direction of the coil body; the two adjacent dynamic contacts can produce relative displacement along the movement direction of the dynamic contact based on the elastic deformation ability of the connecting parts of the corresponding two second elastic members.

31. The relay according to claim 8, wherein It also includes a third elastic member, which is installed on the base and is located on a side of the pushing member away from the static contact member. When the dynamic contact member is in the disconnected position, the third elastic member abuts against the pushing member to store energy and makes the dynamic contact member tend to move toward the closed position.

32. The relay according to claim 9, wherein: It also includes a micro switch, which is arranged in the base, and the transmission member is used to trigger the micro switch.

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

34. The relay according to any one of claims 1 to 5, characterized in that The magnetic rotating member includes a first armature, a second armature and a magnet. A recess is provided on the side of the first armature and the second armature facing each other, and the magnet is fixedly installed in the space formed between the two opposite recesses.

35. An electric meter, characterized in that: Comprising the relay according to any one of claims 1 to 34.

36. The electric meter according to claim 35, characterized in that It also includes a watch case, which has a height direction; the relay is installed in the watch case, and the extension direction of the electrical connection end of the relay is consistent with the height direction of the watch case.

37. The electric meter according to claim 35, characterized in that The magnetic circuit portion is located in the middle of the watch case.

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