Relay and electricity meter

Abstract

The utility model relates to the technical field of electronic control devices, in particular to a relay and an electricity meter. The relay comprises a shell, a fixing frame, a contact part, a magnetic circuit part and an auxiliary switch, the shell has the length direction, the width direction and the height direction which are perpendicular to one another, the fixing frame is fixedly connected with the shell, and the length direction of the fixing frame is consistent with the length direction of the shell; the contact part has a closed position and an open position; the magnetic circuit part comprises a coil assembly and an armature assembly; the armature assembly is rotatably mounted on the fixing frame; the coil assembly is used for driving the armature assembly to swing around a set axis so as to drive the contact part to move to a closing position or an opening position; the auxiliary switch is installed on the fixing frame and located on one side of the armature assembly in the length direction of the shell, the shortest distance between the auxiliary switch and the contact part is larger than the shortest distance between the auxiliary switch and the coil assembly, and the size of the relay can be reduced on the basis that the insulation safety is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic control devices, in particular to a relay and an electric meter. Background Art

[0002] A relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit). It is usually used in automatic control circuits. A relay is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] In the related art, the action of the relay is detected by setting a micro switch. The micro switch is usually set between the contact part and the armature assembly, and the micro switch is triggered by a protruding structure set on the armature assembly. The conventional micro switch is generally a rectangular block structure with a spring, and the protruding structure set on the armature assembly can contact or separate with the spring. This kind of micro switch will occupy the internal space in the height direction of the relay, and the area where the contact part is located is a high-voltage area. In order to enhance the insulation safety, the micro switch needs to be separated from the contact part by a certain distance, and even a retaining wall needs to be set between the contact part and the micro switch, which will further increase the external volume of the relay. Utility Model Content

[0004] The embodiments of the utility model provide a relay and an electric meter, so as to reduce the volume of the relay while enhancing insulation safety.

[0005] The relay provided by the embodiment of the utility model comprises:

[0006] A shell, wherein the shell has a length direction, a width direction and a height direction that are perpendicular to each other;

[0007] A fixing frame, the fixing frame is fixedly connected to the shell, and the length direction of the fixing frame is consistent with the length direction of the shell;

[0008] a contact portion having a closed position and an open position;

[0009] a magnetic circuit portion, the magnetic circuit portion comprising a coil assembly and an armature assembly, the axial direction of the coil assembly being consistent with the length direction of the shell, the coil assembly, the armature assembly and the contact portion being arranged along the height direction of the shell; the armature assembly being rotatably mounted on the fixing frame; the coil assembly being used to drive the armature assembly to swing around a set axis to drive the contact portion to move to a closed position or an open position; and

[0010] An auxiliary switch is mounted on the fixing frame. Along the length direction of the shell, the auxiliary switch is located on one side of the armature assembly. The shortest distance between the auxiliary switch and the contact portion is greater than the shortest distance between the auxiliary switch and the coil assembly. The auxiliary switch is used to monitor whether the contact portion is in a closed position or an open position.

[0011] According to some embodiments of the utility model, the auxiliary switch includes an auxiliary moving spring and an auxiliary static spring, and the auxiliary moving spring and the auxiliary static spring are both installed at one end of the length direction of the fixed frame; the auxiliary moving spring is provided with a first contact portion, and the auxiliary static spring is provided with a second contact portion; the auxiliary moving spring can move relative to the auxiliary static spring so that the first contact portion contacts or separates from the second contact portion.

[0012] According to some embodiments of the present invention, the first contact portion is integrally formed with the auxiliary moving spring piece, and the second contact portion is integrally formed with the auxiliary static spring piece.

[0013] According to some embodiments of the present invention, the first contact portion includes at least one protrusion, and line-surface contact is formed between the protrusion and the second contact portion.

[0014] According to some embodiments of the utility model, the auxiliary movable spring has a first end and a second end relative to each other, the first end is used to connect to the circuit board, the second end is located inside the shell, and the portion of the auxiliary movable spring close to the second end is bent toward the auxiliary static spring to form the protrusion.

[0015] According to some embodiments of the present invention, the number of the protrusions is two, and a buffer space is provided between the two protrusions.

[0016] According to some embodiments of the present utility model, the buffer space is a strip-shaped hole, and at least a portion of the strip-shaped hole is arranged at a position where the auxiliary movable spring sheet is bent toward the auxiliary static spring sheet.

[0017] According to some embodiments of the present invention, the auxiliary movable spring is provided with a metal layer at least on a surface of the first contact portion facing the second contact portion, and the auxiliary static spring is provided with a metal layer at least on a surface of the second contact portion facing the first contact portion.

[0018] According to some embodiments of the present invention, the second contact portion is a protrusion disposed toward the auxiliary movable spring, or the surface of the second contact portion in contact with the first contact portion is coplanar with the surface of the auxiliary static spring facing the auxiliary movable spring.

[0019] According to some embodiments of the utility model, the coil assembly includes a coil body, an iron core is arranged inside the coil body, one end of the iron core is connected to a first yoke, and the other end of the iron core is connected to a second yoke; the armature assembly includes a fixing member and a first armature and a second armature partially enclosed in the fixing member, one of the fixing member and the fixing frame is provided with a rotating shaft, and the other is provided with an axial hole, the rotating shaft cooperates with the axial hole, and the set axis is the axis of the rotating shaft;

[0020] The first yoke is located at one end of the first armature and the second armature, and the second yoke is located at the other end of the first armature and the second armature; in the closed position, the first armature is attracted to the second yoke, and the second armature is attracted to the first armature; in the open position, the first armature is attracted to the first yoke, and the second armature is attracted to the second yoke.

[0021] According to some embodiments of the utility model, the first yoke includes a first vertical portion and a first transverse portion, the second yoke includes a second vertical portion and a second transverse portion, the first vertical portion and the second vertical portion both extend along the height direction of the shell, and the first transverse portion and the second transverse portion both extend along the length direction of the shell; a first avoidance space is formed between the first vertical portion and the side wall of the shell to which it is close, for avoiding the auxiliary switch; the length of the first transverse portion is smaller than the length of the second transverse portion; the length of the first armature is greater than the length of the second armature.

[0022] According to some embodiments of the present utility model, the contact part includes a first movable spring part and a second movable spring part, the first movable spring part includes a first movable spring piece, a first movable contact and a first static contact; the second movable spring part includes a second movable spring piece, a second movable contact and a second static contact, the first movable contact of the first movable spring part corresponds to the position of the second static contact of the second movable spring part, and the second movable contact of the second movable spring part corresponds to the position of the first static contact of the first movable spring part;

[0023] In the closed position, the first moving contact contacts the second stationary contact, and the second moving contact contacts the first stationary contact; in the open position, the first moving contact is separated from the second stationary contact, and the second moving contact is separated from the first stationary contact.

[0024] According to some embodiments of the present invention, the armature assembly has a first arm and a second arm;

[0025] The relay further includes two pushers, the two pushers are respectively a first pusher and a second pusher; one end of the first pusher is connected to the first support arm, and the other end of the first pusher is connected to the first moving contact through the first moving spring; one end of the second pusher is connected to the second support arm, and the other end of the second pusher is connected to the second moving contact through the second moving spring;

[0026] The auxiliary movable spring is connected to one of the pushers, and the pusher connected to the auxiliary movable spring can drive the auxiliary movable spring to move relative to the auxiliary static spring, wherein in the closed position, the first contact portion is in contact with the second contact portion; in the open position, the first contact portion is separated from the second contact portion.

[0027] According to some embodiments of the present utility model, a pushing member connected to the auxiliary movable spring is provided with a slot; and an end portion of the auxiliary movable spring close to the first contact portion is limitedly located in the slot.

[0028] According to some embodiments of the utility model, both groove walls of the clamping groove are provided with convex ribs, and the convex ribs are in contact with the auxiliary movable spring.

[0029] According to some embodiments of the utility model, the first movable spring part also includes a first lead-out piece, and the second movable spring part also includes a second lead-out piece; one end of the first lead-out piece is connected to the first movable spring piece, and one end of the second lead-out piece is connected to the second movable spring piece, and the other ends of the first lead-out piece and the second lead-out piece are both extended from the shell; the first lead-out piece includes a horizontal plate and a vertical plate, the extension direction of the horizontal plate is consistent with the length direction of the shell, and the extension direction of the vertical plate is consistent with the height direction of the shell; the shell includes a base and a cover body, along the length direction of the shell, the base has a first side wall and a second side wall opposite to each other, the first side wall includes a first sub-wall and a second sub-wall, the first sub-wall and the second sub-wall are spaced apart to form a channel for the horizontal plate to extend out; the distance between the second sub-wall and the second side wall is smaller than the distance between the first sub-wall and the second side wall, so that an accommodating space is formed between the outer surface of the second sub-wall and the plane where the outer surface of the first sub-wall is located, and at least part of the vertical plate is located in the accommodating space.

[0030] According to some embodiments of the utility model, the cover body is provided with an avoidance groove on the surface corresponding to the first side wall, and the avoidance groove penetrates the cover body along the width direction of the shell; the transverse plate is provided with a widened portion along the width direction of the shell, and the widened portion is located in the avoidance groove.

[0031] According to some embodiments of the utility model, the coil assembly also includes a coil pin, one end of which extends to the outside of the shell for connecting to a circuit board, and the ends of the coil pin, the auxiliary moving spring and the auxiliary static spring for connecting to the circuit board are spaced apart along the height direction of the shell.

[0032] According to some embodiments of the utility model, an installation groove is provided in the shell, and a first magnetic isolation portion is installed in the installation groove. Along the length direction of the shell, the first magnetic isolation portion is located between the coil assembly and the side wall of the shell.

[0033] According to some embodiments of the present invention, an escape space is provided on an end surface of one end of the coil assembly in the length direction, and the first magnetic isolation portion is located in the escape space.

[0034] According to some embodiments of the utility model, the relay also includes a shielding cover, which includes a U-shaped plate structure, and the U-shaped plate structure includes a first clamping plate, a second clamping plate and a connecting plate connected between the first clamping plate and the second clamping plate, and the connecting plate is located outside the side wall of the shell close to the coil assembly, and the first clamping plate and the second clamping plate are respectively located on both sides of the shell in the width direction.

[0035] According to some embodiments of the present invention, one side of the shell in the width direction has a first outer surface, the first outer surface is provided with a groove, and at least a portion of the first clamping plate is located in the groove along the width direction of the shell.

[0036] According to some embodiments of the present invention, the surface of the first clamping plate facing away from the second clamping plate is flush with the outer surface of the housing provided with the groove.

[0037] According to some embodiments of the present utility model, the first clamping plate is provided with a positioning hole, the bottom of the groove is provided with a positioning protrusion, and the positioning protrusion is limited to the positioning hole.

[0038] According to some embodiments of the utility model, the first outer surface is provided with a through hole, the through hole is spaced apart from the groove, and the through hole is used for allowing the reed of the auxiliary switch and the coil pin of the coil assembly to pass through the housing.

[0039] According to some embodiments of the present invention, the shielding cover further includes side panels, and the side panels are connected to the U-shaped plate structure.

[0040] According to some embodiments of the present invention, a second magnetic isolation portion is provided on the outer surface of the side plate.

[0041] According to some embodiments of the present utility model, the relay further includes an arc extinguishing grid, the housing is provided with a mounting position, and the arc extinguishing grid is mounted on the mounting position.

[0042] The electric meter provided by the embodiment of the utility model comprises the above-mentioned relay.

[0043] One embodiment of the above utility model has at least the following advantages or beneficial effects:

[0044] (1) The relay provided by the embodiment of the utility model installs the auxiliary switch on the fixing frame, which will not occupy the space between the contact part and the armature assembly; along the length direction of the shell, the auxiliary switch is located on one side of the armature assembly, ensuring that the auxiliary switch will not occupy the space in the height direction of the shell, thereby helping to reduce the external dimensions of the relay; at the same time, since the shortest distance between the auxiliary switch and the contact part is greater than the shortest distance between the auxiliary switch and the coil assembly, it is equivalent to the auxiliary switch being away from the strong electric area, thereby enhancing the insulation safety. When the coil assembly drives the armature assembly to swing around the set axis, it can drive the contact part to move to the closed position or the open position, and the auxiliary switch is used to monitor whether the contact part is in the closed position or the open position.

[0045] (2) The first contact portion and the auxiliary moving spring piece are integrally formed, and the second contact portion and the auxiliary static spring piece are integrally formed, so that there is no need to perform riveting or welding operations on the auxiliary contacts, thereby improving production efficiency.

[0046] (3) The housing has a first outer surface on one side in the width direction, and the first outer surface is provided with a groove, and at least a portion of the first clamping plate is located in the groove along the width direction of the housing. By providing the groove on the first outer surface, at least a portion of the first clamping plate can be embedded in the cover body, thereby reducing the width dimension of the relay.

[0047] (4) Along the length direction of the shell, the base has a first side wall and a second side wall opposite to each other, the first side wall includes a first sub-wall and a second sub-wall, the first sub-wall and the second sub-wall are spaced apart to form a channel for the horizontal plate of the first lead-out piece to extend out; the distance between the second sub-wall and the second side wall is smaller than the distance between the first sub-wall and the second side wall, so that an accommodation space is formed between the outer surface of the second sub-wall and the plane where the outer surface of the first sub-wall is located, and at least a part of the vertical plate of the first lead-out piece is located in the accommodation space, ensuring that at least a part of the vertical plate is located in the accommodation space, which is conducive to further reducing the length direction of the relay. At the same time, it can shorten the length of the horizontal plate and reduce the amount of material required for making the first lead-out piece. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 What is shown is a schematic diagram of the structure of a relay provided in an embodiment of the utility model;

[0049] Figure 2 Shown is a schematic diagram of the structure of a relay provided by an embodiment of the utility model (the cover is not shown);

[0050] Figure 3 What is shown is a schematic diagram of the auxiliary switch in the relay provided by the embodiment of the utility model cooperating with the fixing frame;

[0051] Figure 4 It shows Figure 3 A partial enlarged view of the middle A;

[0052] Figure 5 What is shown is a schematic diagram of the internal structure of a relay provided by an embodiment of the utility model;

[0053] Figure 6 What is shown is a schematic diagram of the internal structure of a relay provided in an embodiment of the utility model (the fixing frame is not shown);

[0054] Figure 7 It shows Figure 6 A partial enlarged view of point B in the middle;

[0055] Figure 8 Shown is a schematic diagram of the first contact portion and the second contact portion in a contact state;

[0056] Fig. 9 Shown is a schematic diagram of the cooperation between the auxiliary dynamic spring piece, the auxiliary static spring piece and the fixing frame;

[0057] Fig.10 It is a schematic diagram showing another perspective of the cooperation between the auxiliary dynamic spring piece, the auxiliary static spring piece and the fixing frame;

[0058] Fig.11 Another structural schematic diagram of a relay provided by an embodiment of the utility model is shown;

[0059] Fig.12 Another structural schematic diagram of a relay provided in an embodiment of the utility model is shown (the shielding cover is not shown);

[0060] Fig.13 Shown is a side view of another structure of a relay provided by an embodiment of the utility model;

[0061] Fig.14 It shows Fig.13 A cross-sectional view along line CC;

[0062] Fig.15 Shown is a third structural schematic diagram of a relay provided by an embodiment of the utility model;

[0063] Fig.16Shown is a side view of a third structure of a relay provided by an embodiment of the utility model;

[0064] Fig.17 It shows Fig.16 A cross-sectional view along line EE;

[0065] Fig.18 What is shown is a schematic diagram of the structure of a base in a relay provided in an embodiment of the utility model;

[0066] Fig.19 What is shown is the front view of the internal structure of the electric meter provided by the embodiment of the utility model;

[0067] Fig. 20 Shown is a left view of the internal structure of the electric meter provided by an embodiment of the utility model.

[0068] The following are the descriptions of the reference numerals:

[0069] 1-relay; 10-housing; 11-base; 111-installation slot; 112-accommodation space; 113-first sub-wall; 114-second sub-wall; 115-second side wall; 116-blocking wall; 12-cover; 121-groove; 1211-positioning protrusion; 13-first outer surface; 14-third outer surface; 20-fixed frame; 30-auxiliary switch; 31-auxiliary static spring; 311-second contact portion; 32-auxiliary dynamic spring ;321-first contact portion;3211-protrusion;3212-buffer space;41-coil assembly;411-first yoke;4111-first vertical portion;4112-first transverse portion;412-second yoke;4121-second vertical portion;4122-second transverse portion;413-coil frame;414-coil pin;42-armature assembly;421-fixing member;4211-rotating shaft;4212-first arm;4 213-second arm; 422-first armature; 423-second armature; 51-first moving spring; 52-first moving contact; 53-first static contact; 54-first lead-out piece; 541-transverse plate; 5411-widening portion; 542-vertical plate; 543-folding plate; 61-second moving spring; 62-second moving contact; 63-second static contact; 64-second lead-out piece; 71-first pusher; 72-second pusher; 72 1-slot; 722-convex rib; 80-shielding cover; 81-first clamping plate; 82-second clamping plate; 83-connecting plate; 84-side plate; 91-first magnetic isolation part; 92-second magnetic isolation part; 100-arc extinguishing grid; 200-case; 300-circuit board; 400-terminal seat; 401-first terminal; 402-second terminal; 403-third terminal; 404-fourth terminal; 500-component plug. DETAILED DESCRIPTION

[0070] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0071] See also Figures 1 to 20 As shown, this embodiment provides a relay 1, including a housing 10, a fixing frame 20, a contact portion, a magnetic circuit portion and an auxiliary switch 30, wherein the housing 10 has mutually perpendicular length directions (with Figure 1 The arrow direction D1 in the figure indicates the width direction (indicated by Figure 1 The arrow direction D2 in the figure indicates the height direction (indicated by Figure 1 The fixing frame 20 is fixedly connected to the housing 10, and the length direction of the fixing frame 20 is consistent with the length direction of the housing 10; the contact portion has a closed position and an open position; the magnetic circuit portion includes a coil assembly 41 and an armature assembly 42, the axial direction of the coil assembly 41 is consistent with the length direction of the housing 10, and the coil assembly 41, the armature assembly 42 and the contact portion are arranged along the height direction of the housing 10; the armature assembly 42 is rotatably mounted on the fixing frame 20; the coil assembly 41 is used to drive the armature assembly 42 to swing around a set axis to drive the contact portion to move to a closed position or an open position; the auxiliary switch 30 is mounted on the fixing frame 20, and along the height direction of the housing 10, the maximum size of the auxiliary switch 30 is smaller than the maximum size of the fixing frame 20, and the shortest distance between the auxiliary switch 30 and the contact portion is greater than the shortest distance between the auxiliary switch 30 and the coil assembly 41; the auxiliary switch 30 is used to monitor whether the contact portion is in a closed position or an open position.

[0072] The relay provided in this embodiment installs the auxiliary switch 30 on the fixing frame 20, which will not occupy the space between the contact part and the armature assembly 42; along the height direction of the housing 10 and along the length direction of the housing, the auxiliary switch is located on one side of the armature assembly, ensuring that the auxiliary switch 30 will not occupy the space in the height direction of the housing 10, thereby helping to reduce the external dimensions of the relay; at the same time, since the shortest distance between the auxiliary switch 30 and the contact part is greater than the shortest distance between the auxiliary switch 30 and the coil assembly 41, it is equivalent to the auxiliary switch 30 being away from the strong electric area, thereby enhancing the insulation safety. When the coil assembly 41 drives the armature assembly 42 to swing around the set axis, it can drive the contact part to move to the closed position or the open position, and the auxiliary switch 30 is used to monitor whether the contact part is in the closed position or the open position.

[0073] In one embodiment, the auxiliary switch 30 includes an auxiliary moving spring 32 and an auxiliary static spring 31, both of which are installed at one end of the length direction of the fixing frame 20; the auxiliary moving spring 32 is provided with a first contact portion 321, and the auxiliary static spring 31 is provided with a second contact portion 311; the auxiliary moving spring 32 can move relative to the auxiliary static spring 31 so that the first contact portion 321 contacts or separates from the second contact portion 311.

[0074] The auxiliary moving spring 32 and the auxiliary static spring 31 are spaced apart along the width direction of the fixing frame 20 , and the width direction of the fixing frame 20 is consistent with the height direction of the housing 10 . Compared with the existing auxiliary switch 30 , the reed-type auxiliary switch 30 in this embodiment is smaller in size.

[0075] The shortest distance between the auxiliary switch 30 and the contact portion refers to the distance between the auxiliary moving reed 32 and the contact portion, and the shortest distance between the auxiliary switch 30 and the coil assembly 41 refers to the distance between the auxiliary static reed 31 and the coil assembly 41 .

[0076] See also Figure 3 As shown, the fixing frame 20 is provided with a first mounting hole and a second mounting hole, and the auxiliary movable spring piece 32 is installed in the first mounting hole. The auxiliary movable spring piece 32 has a first end and a second end opposite to each other, and the first end and the second end are respectively located on both sides of the fixing frame 20. The first end extends from the housing 10 and is used to connect with the circuit board 300. The second end is located inside the housing 10, and the first contact portion 321 is arranged near the second end. The auxiliary static spring piece 31 also has a first end and a second end opposite to each other, and the auxiliary static spring piece 31 is installed in the second mounting hole. The first end and the second end of the auxiliary static spring piece 31 are respectively located on both sides of the fixing frame 20. The first end extends from the housing 10 and is used to connect with the circuit board 300. The second end is located inside the housing 10, and the second contact portion 311 is arranged near the second end.

[0077] See also Figure 1 As shown, the housing 10 includes a base 11 and a cover 12, and the cover 12 is covered on the base 11. Exemplarily, the cover 12 and the base 11 are connected by a buckle. In this embodiment, the first ends of the auxiliary dynamic spring 32 and the auxiliary static spring 31 extend from the cover 12 to the outside of the housing, and of course, they can also extend from the base 11 to the outside of the housing. It should be noted that in the use state, the base 11 is not necessarily located below the cover 12.

[0078] In some embodiments, see Figure 2As shown, a retaining wall 116 is provided in the housing 10, and the retaining wall 116 is located between the contact portion and the armature assembly. By providing the retaining wall, the creepage distance can be increased, and the air gap can be increased by arranging the positions of the contact portion and the magnetic circuit portion, thereby further enhancing the insulation safety. At the same time, glue can be applied to the upper surface of the retaining wall to fix the fixing frame.

[0079] Exemplarily, the retaining wall 116 is integrally formed with the base 11 .

[0080] See also Figure 2 As shown, the auxiliary moving spring 32 and the auxiliary static spring 31 are both installed at one end of the length direction of the fixing frame 20, ensuring that the first ends of the auxiliary moving spring 32 and the auxiliary static spring 31 are located on the same side of the relay, which is convenient for connection with the circuit board 300.

[0081] In this embodiment, the armature assembly 42 can drive the auxiliary movable spring piece 32 to move toward the direction close to the auxiliary static spring piece 31, so that the first contact portion 321 contacts the second contact portion 311. The armature assembly 42 can also drive the auxiliary movable spring piece 32 to move away from the auxiliary static spring piece 31, so that the first contact portion 321 separates from the second contact portion 311.

[0082] In this embodiment, when the contact portion moves to the closed position, the first contact portion 321 contacts the second contact portion 311 ; when the contact portion moves to the open position, the first contact portion 321 separates from the second contact portion 311 .

[0083] In other embodiments, when the contact portion moves to the closed position, the first contact portion 321 is separated from the second contact portion 311 ; when the contact portion moves to the open position, the first contact portion 321 is in contact with the second contact portion 311 .

[0084] In one embodiment, the first contact portion 321 is integrally formed with the auxiliary moving spring piece 32, and the second contact portion 311 is integrally formed with the auxiliary static spring piece 31, so that there is no need to perform riveting or welding of the auxiliary contacts, thereby improving production efficiency. When the magnetic circuit portion of the relay drives the contact portion to move, it can simultaneously drive the auxiliary moving spring piece 32 to move relative to the auxiliary static spring piece 31, so that the first contact portion 321 is in contact with or separated from the second contact portion 311, thereby monitoring the closing and opening states of the main contacts of the relay contact portion.

[0085] In other embodiments, the first contact portion and the second contact portion may also be contact structures riveted or welded to the auxiliary movable spring piece 32 and the auxiliary static spring piece 31 respectively. Exemplarily, the material of the contact structure may be silver or a silver alloy.

[0086] In one embodiment, the first contact portion 321 includes at least one protrusion 3211, and a line-surface contact is formed between the protrusion 3211 and the second contact portion 311. This ensures that the protrusion 3211 and the second contact portion 311 are in reliable contact, thereby improving the sensitivity of the auxiliary switch 30.

[0087] In some embodiments, the protrusion 3211 can be formed by stamping the auxiliary movable spring 32 or by bending the auxiliary movable spring 32 .

[0088] In other embodiments, the protrusion 3211 can also make the auxiliary movable spring 32 into a sheet structure with different thicknesses. For example, the auxiliary movable spring 32 is partially thickened, and the thickened part forms the protrusion 3211. For example, the auxiliary movable spring 32 is formed with two thinning areas set at intervals, and the part between the two thinning areas forms the protrusion 3211.

[0089] In some other embodiments, the auxiliary movable spring 32 can be formed by die casting.

[0090] A portion of the auxiliary movable spring 32 close to the second end is bent toward the auxiliary static spring 31 to form a protrusion 3211 .

[0091] For example, see Figure 4 , Fig. 9 and Fig.10 As shown, the raised portion 3211 is generally in a U-shaped bending structure, and the surface of the U-shaped bending structure facing the second contact portion 311 is an arc-shaped surface; the second contact portion 311 is a generally vertical plane, and the arc-shaped surface is in line-surface contact with the second contact surface, thereby improving the contact reliability and further improving the sensitivity of the auxiliary switch 30.

[0092] It should be noted that the shape of the protrusion is not limited to the U-shaped bending structure, for example, it can also be a V-shaped bending structure, and the surface of the V-shaped bending structure facing the second contact portion 311 is an arc surface.

[0093] In one embodiment, the number of the protrusions 3211 is two, and a buffer space 3212 is provided between the two protrusions 3211. In this way, a double contact effect can be produced, ensuring that the first contact portion 321 and the second contact portion 311 of the auxiliary switch 30 can be in normal contact, thereby enhancing contact reliability. During the design, the moving stroke of the auxiliary movable spring piece 32 toward the auxiliary static spring piece 31 is designed to be much larger than the distance between the first contact portion 321 and the second contact portion 311. Due to the provision of the buffer space 3212, when the contact between one protrusion 3211 and the auxiliary static spring piece 31 fails, the other protrusion 3211 can continue to move toward the direction close to the auxiliary static spring piece 31 under the action of the driving force, that is, the other protrusion 3211 can go through an overstroke until the other protrusion 3211 contacts and conducts with the second contact portion 311.

[0094] In one embodiment, the buffer space 3212 is a strip-shaped hole, and at least a portion of the strip-shaped hole is disposed at a position where the auxiliary movable spring piece 32 is bent toward the auxiliary static spring piece 31 .

[0095] See also Fig. 9 As shown, the strip hole extends from the position where the auxiliary movable spring piece 32 is bent toward the auxiliary static spring piece 31 to both ends to increase the buffering effect. When one of the protrusions 3211 fails, it is ensured that the other protrusion 3211 can normally contact the second contact portion 311.

[0096] It should be understood that during production and processing, the strip hole can be processed on the plate-shaped auxiliary dynamic spring piece 32 first, and then bent to form the protrusion 3211, or the plate-shaped auxiliary dynamic spring piece 32 can be bent first, and then the strip hole can be processed at the bending position.

[0097] It should be noted that the buffer space 3212 is not limited to the bar-shaped hole, and other forms of buffer space 3212 can be selected according to actual production and processing needs, as long as the function of double contacts can be achieved and the contact reliability can be improved.

[0098] In some embodiments, see Fig.10 As shown, the second contact portion 311 is a protrusion disposed toward the auxiliary movable spring piece 32. The protrusion can be formed by punching the auxiliary static spring piece 31, or by bending the auxiliary static spring piece 31.

[0099] Exemplarily, the surface of the protrusion 3211 facing the first contact portion 321 may be a plane, so as to form a line-surface contact with the arc-shaped surface of the protrusion 3211 .

[0100] In some other embodiments, the surface where the second contact portion 311 contacts the first contact portion 321 is coplanar with the surface of the auxiliary static spring piece 31 facing the auxiliary dynamic spring piece 32 .

[0101] Exemplarily, the auxiliary static spring piece 31 may be a flat plate-shaped structure, and the second contact portion 311 is a portion of the flat plate-shaped structure corresponding to the first contact portion 321 .

[0102] It should be understood that, among the surfaces of the protrusion 3211 and the second contact portion 311 that are close to each other, one is a curved surface (not limited to an arc surface) and the other is a flat surface, as long as the curved surface and the flat surface are in line-surface contact to enhance contact reliability.

[0103] In one embodiment, the auxiliary movable spring 32 is provided with a metal layer (not shown in the figure) at least on the surface of the first contact portion 321 facing the second contact portion 311, and the auxiliary static spring 31 is provided with a metal layer (not shown in the figure) at least on the surface of the second contact portion 311 facing the first contact portion 321.

[0104] By providing a metal layer, it is possible to slow down the oxidation rate of the auxiliary switch 30. For example, the metal layer can be formed by electroplating.

[0105] The material of the metal layer can be silver or silver alloy. After silver plating, the contact resistance is small, which increases the sensitivity of the auxiliary switch 30. When the first contact portion 321 contacts the second contact portion 311, it can quickly identify that the auxiliary switch 30 is in the on state.

[0106] Of course, the material of the metal layer can also be gold. For example, gold plating can be used in the military field.

[0107] In some embodiments, the auxiliary movable spring 32 is provided with a metal layer on the surface of the first contact portion 321 facing the second contact portion 311, and the auxiliary static spring 31 is provided with a metal layer on the surface of the second contact portion 311 facing the first contact portion 321. In this way, the sensitivity and anti-oxidation ability of the auxiliary switch 30 can be increased while the coating area is as small as possible.

[0108] In other embodiments, a metal layer is provided on the entire surface of the auxiliary moving spring piece 32 and the entire surface of the auxiliary static spring piece 31. During electroplating, the auxiliary moving spring piece 32 and the auxiliary static spring piece 31 can be placed in a plating solution for electroplating, which has a simple process and high production efficiency.

[0109] In one embodiment, see Figure 6As shown, the coil assembly 41 includes a coil body, an iron core is arranged inside the coil body, one end of the iron core is connected to a first yoke 411, and the other end of the iron core is connected to a second yoke 412; the armature assembly 42 includes a fixing member 421 and a first armature 422 and a second armature 423 partially covered in the fixing member 421, one of the fixing member 421 and the fixing frame 20 is provided with a rotating shaft 4211, and the other is provided with an axial hole, the rotating shaft 4211 cooperates with the axial hole, and is provided The fixed axis is the axis of the rotating shaft 4211; the first yoke 411 is located at one end of the first armature 422 and the second armature 423, and the second yoke 412 is located at the other end of the first armature 422 and the second armature 423; in the closed position, the first armature 422 and the second yoke 412 are attracted, and the second armature 423 and the first yoke 411 are attracted; in the open position, the first armature 422 and the first yoke 411 are attracted, and the second armature 423 and the second yoke 412 are attracted.

[0110] The armature assembly 42 also includes a magnet, which is arranged between the first armature 422 and the second armature 423 and fixed together by a fixing member 421. Exemplarily, the fixing member 421 can be an injection molded part, which covers the first armature 422, the second armature 423 and the magnet to form a whole. Both ends of the first armature 422 and the second armature 423 are located outside the injection molded part to facilitate attraction with the first yoke 411 and the second yoke 412.

[0111] In this embodiment, see Figure 6 As shown, the fixing member 421 is provided with a rotating shaft 4211, and the axis is set to be the axis of the rotating shaft 4211; the fixing frame 20 is provided with an axis hole, and the rotating shaft 4211 cooperates with the axis hole; correspondingly, the base 11 is also provided with an axis hole. In order to clearly describe the technical solution of this embodiment, the axis hole provided by the fixing frame 20 is named as the first axis hole, and the axis hole provided by the base 11 is named as the second axis hole. One end of the rotating shaft 4211 cooperates with the first axis hole, and the second end of the rotating shaft 4211 cooperates with the second axis hole.

[0112] In other embodiments, an axial hole may be provided on the fixing member 421 , and a rotating shaft 4211 may be provided on the fixing frame 20 .

[0113] In one embodiment, see Figure 6 As shown, the first yoke 411 includes a first vertical portion 4111 and a first transverse portion 4112, and the second yoke 412 includes a second vertical portion 4121 and a second transverse portion 4122, the first vertical portion and the second vertical portion both extend in the height direction of the housing 10, and the first transverse portion and the second transverse portion both extend in the length direction of the housing 10. It should be understood that the first vertical portion and the second vertical portion both extend substantially in the height direction of the housing 10, and the first transverse portion and the second transverse portion both extend substantially in the length direction of the housing 10.

[0114] Since the auxiliary switch 30 is arranged at one end of the length direction of the fixing frame 20, the axial direction of the coil assembly 41 is consistent with the length direction of the fixing frame 20. In order to prevent the second yoke 412 from interfering with the auxiliary switch 30, the axial length of the coil body is shortened, so that a first avoidance space is formed between the first vertical portion and the side wall of the shell 10 to which it is close, for avoiding the auxiliary switch 30; since the second vertical portion is closer to the center of the coil body than the first vertical portion, the length of the second transverse portion is smaller than the length of the first transverse portion, so that the rotating shaft 4211 of the armature assembly 42 can be located as much as possible in the middle position of the two free ends of the first transverse portion and the second transverse portion, ensuring the stable overlap of the first armature 422 and the second armature 423 with the first yoke 411 and the second yoke 412.

[0115] See also Figure 6 As shown, the length of the first armature 422 is greater than the length of the second armature 423, so that the contact area between the first armature 422 and the second transverse portion is substantially equal to the contact area between the second armature 423 and the first transverse portion.

[0116] It should be noted that the structure of the first yoke 411 and the second yoke 412 is not limited to the above one, and other forms can be selected according to the actual product structure, as long as the first armature 422 and the second armature 423 can be stably overlapped with the first yoke 411 and the second yoke 412.

[0117] In one embodiment, the contact part includes a first movable spring part and a second movable spring part, the first movable spring part includes a first movable spring piece 51, a first movable contact 52 and a first static contact 53; the second movable spring part includes a second movable spring piece 61, a second movable contact 62 and a second static contact 63, the first movable contact 52 of the first movable spring part corresponds to the position of the second static contact 63 of the second movable spring part, and the second movable contact 62 of the second movable spring part corresponds to the position of the first static contact 53 of the first movable spring part; in the closed position, the first movable contact 52 contacts the second static contact 63, and the second movable contact 62 contacts the first static contact 53; in the open position, the first movable contact 52 is separated from the second static contact 63, and the second movable contact 62 is separated from the first static contact 53.

[0118] In this embodiment, see Figure 5As shown, the first movable spring part further includes a first lead-out piece 54, and the second movable spring part further includes a second lead-out piece 64. Exemplarily, the first movable contact 52 is connected to one end of the first movable spring piece 51, the other end of the first movable spring piece 51 is connected to the first lead-out piece 54, the first static contact 53 is riveted to the first lead-out piece 54, and the other end of the first movable spring piece 51 is fixed between the first lead-out piece 54 and the first static contact 53. Similarly, the second movable contact 62 is connected to one end of the second movable spring piece 61, the other end of the second movable spring piece 61 is connected to the second lead-out piece 64, the second static contact 63 is riveted to the second lead-out piece 64, and the other end of the second movable spring piece 61 is fixed between the second lead-out piece 64 and the second static contact 63. Among them, the first moving contact 52 of the first moving spring part corresponds to the position of the second static contact 63 of the second moving spring part, and the second moving contact 62 of the second moving spring part corresponds to the position of the first static contact 53 of the first moving spring part, so as to form a parallel circuit structure when the moving and static contacts are in contact.

[0119] In one embodiment, see Figure 6 As shown, the armature assembly 42 has a first arm 4212 and a second arm 4213 ; illustratively, the first arm 4212 and the second arm 4213 are integrally formed and arranged on the fixing member 421 , and the first arm 4212 and the second arm 4213 extend outward from both ends of the fixing member 421 , respectively.

[0120] The relay also includes two pushers, which are a first pusher 71 and a second pusher 72; one end of the first pusher 71 is connected to the first arm 4212, and the other end of the first pusher 71 is connected to the first moving contact 52 through the first moving spring 51; one end of the second pusher 72 is connected to the second arm 4213, and the other end of the second pusher 72 is connected to the second moving contact 62 through the second moving spring 61; the auxiliary moving spring 32 is connected to one of the pushers, and the pusher connected to the auxiliary moving spring 32 can drive the auxiliary moving spring 32 to move relative to the auxiliary static spring 31, wherein, in the closed position, the first contact portion 321 is in contact with the second contact portion 311; in the open position, the first contact portion 321 is separated from the second contact portion 311.

[0121] In this embodiment, the auxiliary switch 30 is disposed on a side of the housing close to the second yoke 412 , and the auxiliary movable spring 32 is connected to the second pusher 72 .

[0122] Of course, the auxiliary switch 30 may also be disposed at one end of the fixing frame 20 close to the first yoke 411 . In this case, the auxiliary movable spring 32 is connected to the first pushing member 71 .

[0123] During operation, power is supplied to the coil body to generate a magnetic field, and different magnetic fields drive the armature assembly to swing accordingly, thereby driving the movable contact of the contact part to move through the pusher. For example, when the armature assembly swings clockwise, the first movable contact 52 separates from the second static contact 63, and at the same time, the second movable contact 62 separates from the first static contact 53; when the armature assembly swings counterclockwise, the first movable contact 52 contacts the second static contact 63, and at the same time, the second movable contact 62 contacts the first static contact 53.

[0124] The following is an example of the cooperation between the second pusher 72 and the second arm 4213. The end of the second arm 4213 is provided with a buckle protrusion, the second pusher 72 is provided with a through hole, the hole wall of the through hole is provided with a stop surface, the end of the second arm 4213 penetrates the through hole, the buckle protrusion undergoes elastic deformation and passes through the through hole, the buckle protrusion returns to its original state, and abuts against the stop surface.

[0125] The cooperation method of the second pushing member 72 and the second support arm 4213 is not limited to the above one, and the cooperation method of the second pushing member 72 and the second support arm 4213 should be understandable to technical personnel in the field, and is well known and easy to implement for technical personnel in the field, so this embodiment will not be described in detail.

[0126] It should be noted that the cooperation mode between the first pushing member 71 and the first supporting arm 4212 is the same as the cooperation mode between the second pushing member 72 and the second supporting arm 4213 , which will not be described in detail herein.

[0127] In one embodiment, the pushing member connected to the auxiliary movable spring piece 32 is provided with a slot 721 ; the end of the auxiliary movable spring piece 32 close to the first contact portion 321 is limited in the slot 721 .

[0128] In this embodiment, the second pusher 72 is provided with a slot 721, and the auxiliary movable spring 32 contacts the slot wall of the slot 721. When the armature assembly 42 swings, it drives the second pusher 72 to move, so that the second pusher 72 pushes and pulls the auxiliary movable spring 32. For example, when the armature assembly 42 drives the second pusher 72 and the first pusher 71 to move and make the first movable contact 52 contact the second static contact 63, and the second movable contact 62 contacts the first static contact 53; the second pusher 72 The auxiliary movable spring piece 32 is driven to move toward the direction approaching the auxiliary static spring piece 31, and the first contact portion 321 is in contact with the second contact portion 311; when the armature assembly 42 drives the second pushing member 72 and the first pushing member 71 to move and separate the first movable contact 52 from the second static contact 63, and the second movable contact 62 from the first static contact 53, the second pushing member 72 drives the auxiliary movable spring piece 32 to move toward the direction away from the auxiliary static spring piece 31, and separates the first contact portion 321 from the second contact portion 311.

[0129] By pushing and pulling the auxiliary movable spring 32 through the second pushing member 72 , the auxiliary movable spring 32 can be prevented from being permanently fatigued, and the auxiliary movable spring 32 can be prevented from being bonded to the auxiliary static spring 31 and failing.

[0130] See also Figure 7 As shown, in order to further enhance the contact reliability between the first contact portion 321 and the second contact portion 311, and to prevent the pusher and the auxiliary movable spring piece 32 from deforming after multiple actions, resulting in unreliable contact between the auxiliary movable spring piece 32 and the pusher, the two groove walls of the slot 721 are provided with convex ribs 722, and the convex ribs 722 are in contact with the auxiliary movable spring piece 32. The contact between the convex rib 722 and the auxiliary movable spring piece 32 is a line-surface contact, so that the push-pull position can be concentrated, that is, the push-pull force point is concentrated at the position where the auxiliary movable spring piece 32 contacts the convex rib 722, so that the contact reliability between the convex rib 722 and the auxiliary movable spring piece 32 can be ensured, and then the first contact portion 321 on the auxiliary movable spring piece 32 and the second contact portion 311 on the auxiliary static spring piece 31 can be ensured to be in reliable contact.

[0131] In one embodiment, see Figure 5 and Figure 6 As shown, the contact portion is offset to the right, which reduces the length of the contact portion and leaves space on the left side for arranging the first lead-out piece 54.

[0132] One end of the first lead-out piece 54 is connected to the first movable spring piece 51, one end of the second lead-out piece 64 is connected to the second movable spring piece 61, and the other ends of the first lead-out piece 54 and the second lead-out piece 64 are both extended from the housing 10; the first lead-out piece 54 includes a horizontal plate 541 and a vertical plate 542, the extension direction of the horizontal plate 541 is consistent with the length direction of the housing 10, and the extension direction of the vertical plate 542 is consistent with the height direction of the housing 10; it should be understood that the extension direction of the horizontal plate 541 is generally consistent with the length direction of the housing 10, and the extension direction of the vertical plate 542 is generally consistent with the height direction of the housing 10. The material of the first lead-out piece 54 is copper or copper alloy. The horizontal part and the vertical part are integrally formed.

[0133] See also Figure 3 and Fig.18 As shown, along the length direction of the shell 10, the base 11 has a first side wall and a second side wall 115 opposite to each other, the first side wall includes a first sub-wall 113 and a second sub-wall 114, the first sub-wall 113 and the second sub-wall 114 are spaced apart to form a channel for the horizontal plate 541 to extend out; the distance between the second sub-wall 114 and the second side wall 115 is smaller than the distance between the first sub-wall 113 and the second side wall 115, so that an accommodating space 112 is formed between the outer surface of the second sub-wall 114 and the plane where the outer surface of the first sub-wall 113 is located, and at least a portion of the vertical plate 542 is located in the accommodating space 112.

[0134] By forming a receiving space 112 between the plane where the outer surface of the second sub-wall 114 and the outer surface of the first sub-wall 113 are located, it is ensured that at least a portion of the vertical plate 542 is located in the receiving space 112, which is beneficial to further reduce the length dimension of the relay. At the same time, the length of the horizontal plate 541 can be shortened and the amount of copper used can be reduced.

[0135] For example, in this embodiment, see Figure 6 As shown, the outer surface of the vertical plate 542 is flush with the outer surface of the first sub-wall 113 .

[0136] In one embodiment, the first lead-out piece 54 further includes a folding plate 543 , which is integrally formed with the vertical portion. The folding plate 543 is substantially parallel to the transverse plate 541 , and the folding plate 543 and the transverse plate 541 are located on the same side of the vertical plate 542 .

[0137] Exemplarily, one end of the folded-back plate 543 away from the vertical plate 542 is used to be connected to the live wire input terminal of the electric meter, and the second lead-out piece 64 is used to be connected to the live wire output terminal of the electric meter.

[0138] In one embodiment, a avoidance groove is provided on the surface of the cover body 12 corresponding to the first side wall, and the avoidance groove penetrates the cover body 12 along the width direction of the shell 10; along the width direction of the shell 10, the transverse plate 541 is provided with a widened portion 5411, and the widened portion 5411 is located in the avoidance groove.

[0139] By providing an avoidance groove on the surface of the cover body 12 corresponding to the first side wall, space can be reserved for the transverse plate 541, so that the widened portion 5411 of the transverse plate 541 provided along the width direction of the shell 10 can be located in the avoidance groove, thereby increasing the current-carrying area of ​​the transverse plate 541, thereby ensuring that the temperature of the first lead-out plate 54 is within a reasonable range and no obvious heat generation occurs.

[0140] In one embodiment, see Figure 2 As shown, the coil assembly 41 also includes a coil pin 414, one end of which extends to the outside of the housing 10 for connection with the circuit board 300, and the ends of the coil pin 414, the auxiliary moving spring piece 32 and the auxiliary static spring piece 31 for connection with the circuit board 300 are arranged at intervals along the height direction of the housing 10. That is to say, the ends of the coil pin 414, the auxiliary moving spring piece 32 and the auxiliary static spring piece 31 for connection with the circuit board 300 are roughly in a straight line, which not only facilitates connection with the circuit board 300, but also can make full use of the space in the height direction of the relay, and is conducive to further reducing the size of the relay in the length direction.

[0141] In one embodiment, see Figure 8 and Fig.18As shown, a mounting groove 111 is provided in the housing 10 , and a first magnetic isolation portion 91 is installed in the mounting groove 111 . Along the length direction of the housing 10 , the first magnetic isolation portion 91 is located between the coil assembly 41 and the side wall of the housing 10 .

[0142] By providing the first magnetic isolation portion 91 between the coil assembly 41 and the side wall of the housing 10 , the magnetic resistance of the external magnetic field entering the interior of the relay can be increased, thereby weakening the interference of the external magnetic field on the magnetic circuit.

[0143] In one embodiment, an escape space is provided on the end surface of one end of the coil assembly 41 in the longitudinal direction, and the first magnetic isolation portion 91 is located in the escape space. In this way, the first magnetic isolation portion 91 can be arranged without increasing the length of the relay to enhance the anti-magnetic effect.

[0144] For example, see Figure 8 As shown, the coil assembly 41 includes a coil frame 413, and the coil is wound on the coil frame 413 to form a coil body. The avoidance space is set on the lower surface of the coil frame 413, and the avoidance space runs through the outer end surface of the coil frame 413. During assembly, the first magnetic isolation portion 91 can be installed in the installation groove 111 first, and then the coil assembly 41 is installed. At this time, the avoidance space on the coil frame 413 is aligned with the first magnetic isolation portion 91. After the coil frame 413 is installed in place, it can press and fix the first magnetic isolation portion 91.

[0145] Exemplarily, the first magnetic isolation portion 91 may be an iron sheet.

[0146] In one embodiment, see Fig.11 As shown, the relay also includes a shielding cover 80, which includes a U-shaped plate structure. The U-shaped plate structure includes a first clamping plate 81, a second clamping plate 82 and a connecting plate 83 connected between the first clamping plate 81 and the second clamping plate 82. The connecting plate 83 is located outside the side wall of the shell 10 close to the coil assembly 41, and the first clamping plate 81 and the second clamping plate 82 are respectively located on both sides of the width direction of the shell 10.

[0147] The shielding cover 80 may be made of iron. Since the coil assembly 41 is close to the side wall of the housing 10 and is easily disturbed by the external magnetic field, the shielding cover 80 can enhance the anti-magnetic effect and effectively reduce the interference of the external magnetic field on the coil assembly 41.

[0148] In one embodiment, see Fig.12 As shown, one side of the housing 10 in the width direction has a first outer surface 13 , and the first outer surface 13 is provided with a groove 121 . At least a portion of the first clamping plate 81 is located in the groove 121 along the width direction of the housing 10 .

[0149] In this embodiment, the first outer surface 13 is the surface of the cover 12 facing away from the base 11. By providing a groove 121 on the first outer surface 13, at least part of the first clamping plate 81 can be embedded in the cover 12, thereby reducing the width dimension of the relay.

[0150] The surface opposite to the first outer surface 13 is the second outer surface. The second outer surface is the surface of the base 11 facing away from the cover 12 . The surface of the second clamping plate 82 close to the first clamping plate is in contact with the second outer surface.

[0151] Due to the embedding of the first clamping plate 81 , the first clamping plate 81 is closer to the armature assembly 42 . When there is an external magnetic field, the shielding cover 80 can more easily protect the armature assembly 42 , and the external magnetic field can be more easily guided away by the shielding cover 80 when passing through the armature assembly 42 .

[0152] As the shielding cover 80 is embedded and sunk, the shielding cover 80 is closer to the permanent magnet of the armature assembly 42, and the external magnetic field enters the permanent magnet. A part of the magnetic field is transmitted according to the shortest path (with Fig.14 The direction of the arrow M in the figure indicates the direction of the magnetic field. This principle is used to conduct the magnetic field, thereby enhancing the ability of the magnetic field to enter the relay and improving the anti-magnetic ability of the relay.

[0153] It should be noted that when there is extra space on the base 11 along the height direction of the shell 10 , a recessed groove may be provided on the second outer surface, and at least a portion of the second clamping plate 82 is confined in the recessed groove.

[0154] In one embodiment, see Fig.12 As shown, the first outer surface 13 is provided with a through hole, which is spaced apart from the groove 121 , and the through hole is used for allowing the reed of the auxiliary switch 30 and the coil pin 414 of the coil assembly 41 to pass through the housing 10 .

[0155] Specifically, there are four through holes, which are spaced apart along the height direction of the housing 10. One group of two adjacent through holes is used for the coil pin 414 to pass through the housing 10, and the other group of two adjacent through holes is used for the auxiliary moving spring piece 32 and the auxiliary static spring piece 31 to pass through the housing 10 respectively.

[0156] See also Fig.12 and Fig.17As shown, along the length direction of the shell 10, the width of the groove 121 is smaller than the length of the shell 10, and the four through holes are all arranged in the portion of the first outer surface 13 located between the groove wall of the groove 121 and the side wall of the shell 10 close to the groove wall. Taking the auxiliary movable spring 32 as an example, since along the width direction of the shell 10, the distance between the first outer surface 13 and the fixing frame 20 is greater than the distance between the groove bottom of the groove 121 and the fixing frame 20, the contact position between the auxiliary movable spring 32 and the fixing frame 20 and the contact position between the auxiliary movable spring 32 and the shell 10 are far apart, thereby protecting the auxiliary movable spring 32 and reducing the risk of bending or even fatigue fracture of the auxiliary movable spring 32.

[0157] Likewise, it can also protect the auxiliary static spring piece 31 and reduce the risk of the auxiliary static spring piece 31 being bent when connected to the circuit board 300 .

[0158] In one embodiment, see Fig.11 As shown, the surface of the first clamping plate 81 facing away from the second clamping plate 82 is flush with the outer surface of the housing 10 provided with the groove 121. In this way, the dimension of the relay in the width direction can be reduced while ensuring the anti-magnetic capability of the shielding cover 80.

[0159] After the auxiliary moving reed 32 , the auxiliary stationary reed 31 and the coil pin 414 are welded to the circuit board 300 , the relay can be more flush with the circuit board 300 .

[0160] In one embodiment, see Fig.17 As shown, the first clamping plate 81 is provided with a positioning hole, and the bottom of the groove 121 is provided with a positioning protrusion 1211, and the positioning protrusion 1211 is limited to the positioning hole.

[0161] During assembly, the shielding cover 80 can be pushed along the height direction of the housing 10 toward the housing 10 until the positioning protrusion 1211 is located in the positioning hole.

[0162] Exemplarily, the surface of the positioning protrusion 1211 may be a spherical cap curved surface to facilitate assembly.

[0163] In one embodiment, see Fig.15 As shown, the shielding cover 80 further includes side panels 84, and the side panels 84 are connected to the U-shaped plate structure.

[0164] For example, see Fig.17 As shown, the side plate 84 is connected to the second clamping plate 22 ; one side of the shell 10 in the length direction has a third outer surface 14 , and the side plate 84 is located on the third outer surface 14 .

[0165] When the relay is installed in the case 200 of the electric meter, one side wall of the shell 10 in the length direction is close to the side wall of the case 200. In order to prevent the external magnetic field from interfering with the coil assembly 41 of the relay, the shielding cover 80 also includes a side plate 84. The side plate 84 is arranged on the outer surface of the side wall of the shell 10 close to the side wall of the case 200. That is to say, the side plate 84 is located between the side wall of the shell 10 and the side wall of the case 200, thereby further enhancing the anti-magnetic ability.

[0166] It should be noted that the side plate 84 can also be connected to the first clamping plate 81 or the connecting plate 83, and those skilled in the art can make a choice according to the actual installation environment. For example, when the side plate 84 is connected to the first clamping plate 81, the side plate 84 is located on the fourth outer surface, wherein the fourth outer surface is arranged opposite to the third outer surface 14, and the groove runs through the fourth outer surface.

[0167] In one embodiment, see Fig.17 As shown, a second magnetic isolation portion 92 is disposed on the outer surface of the side plate 84 .

[0168] The function of the second magnetic isolation part 92 is substantially the same as that of the first magnetic isolation part 91. The second magnetic isolation part 92 and the first magnetic isolation part 91 may be provided at the same time, or only one of them may be provided. Exemplarily, the second magnetic isolation part 92 may also be an iron sheet.

[0169] In one embodiment, see Fig.14 As shown, the relay further includes an arc extinguishing grid 100 , the housing 10 is provided with an installation position, and the arc extinguishing grid 100 is installed at the installation position.

[0170] The two sets of moving and static contacts of the contact part are respectively the arcing end and the current-carrying end. The contact gap of the arcing end is not equal to the contact gap of the current-carrying end. The current-carrying end is disconnected first and the arcing end is disconnected later. The arc extinguishing grid 100 is set at a position corresponding to the arcing end for better arc extinguishing. The housing 10 is reserved for installation, and the arc extinguishing grid 100 can be installed when the assembly is basically completed.

[0171] It should be understood that the structure and principle of the arc extinguishing grid should be understandable to those skilled in the art, and are well known and easy to implement for those skilled in the art, so this embodiment will not be described in detail.

[0172] See also Fig.19 and Fig. 20 As shown, this embodiment further provides an electric meter, including the relay 1 provided in this embodiment.

[0173] The electric meter provided in this embodiment uses the relay 1 provided in this embodiment, and the auxiliary switch 30 is installed on the fixing frame 20, which will not occupy the space between the contact part and the armature assembly 42; along the height direction of the shell 10, the maximum size of the auxiliary switch 30 is smaller than the maximum size of the fixing frame 20, ensuring that the auxiliary switch 30 will not occupy the internal space of the shell 10, thereby ensuring that the external dimensions of the relay will not increase due to the setting of the auxiliary switch 30; at the same time, since the shortest distance between the auxiliary switch 30 and the contact part is greater than the shortest distance between the auxiliary switch 30 and the coil assembly 41, it is equivalent to the auxiliary switch 30 being away from the strong electric area, thereby enhancing the insulation safety. Without changing the structure of the electric meter, the relay provided in this embodiment can at least meet the following core indicators in a limited space: using an auxiliary switch to monitor the on and off of the contacts, achieving a 500A DC short-circuit breaking capacity, and resisting interference of the relay with an external constant magnetic field.

[0174] In one embodiment, see Fig.19 As shown, the electric meter includes a meter case 200 and a terminal seat 400. Fig.19 The arrow direction Z in the figure indicates the height direction of the case 200 , the arrow direction Y indicates the width direction of the case 200 , and the arrow direction X indicates the length direction of the case 200 .

[0175] Relay 1 is installed in the case, the case 200 includes a back plate, and the back plate is installed with a circuit board 300; the terminal block 400 is installed in the case 200, and the terminal block 400 is provided with a first terminal 401, a second terminal 402, a third terminal 403 and a fourth terminal 404; the first lead-out end is connected to the first terminal 401, the free end of the folded section is connected to the second terminal 402, the end of the neutral wire connector close to the relay is connected to the third terminal 403, and the end of the neutral wire connector away from the relay is connected to the fourth terminal 404.

[0176] The current flows from the outdoor live wire through the first terminal 401 (i.e., the live wire input end of the meter) from the relay to the second terminal 402 (i.e., the live wire output end of the meter) into the indoor live wire. After passing through the power load, the current flows from the indoor neutral wire through the fourth terminal 404 (i.e., the neutral wire input end of the meter) through the mutual inductor, and then flows from the third terminal 403 (i.e., the neutral wire output end of the meter) into the outdoor neutral wire.

[0177] To be compatible with existing devices, the case size is basically unchanged. At the same time, the component plug 500 must be avoided and the layout is carried out on the existing case solution. The available space for the relay is: length 51.6mm, height 41mm, width 28.8mm.

[0178] Exemplarily, the relay dimensions in the electric meter are: length 42.25 mm, height 35.5 mm, width 16.5 mm, and the installation dimensions are: length 49.27 mm, height 44.25 mm, width 18.5 mm. The relay provided in this embodiment can be installed without increasing the volume of the original meter case.

[0179] Without changing the structure of the electric meter, the relay provided in this embodiment can at least meet the following core indicators in a limited space: using an auxiliary switch to monitor the on and off of the contacts, achieving a 500A DC short-circuit breaking capacity, and resisting interference with the relay from an external constant magnetic field.

[0180] Finally, it should be noted that: it is understandable that the various embodiments / implementations provided by the present utility model can be combined with each other without causing any contradiction, and will not be illustrated one by one here.

[0181] In the embodiments of the utility model, 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 otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0182] In the description of the utility model embodiments, it needs to be understood that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model embodiments and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the utility model embodiments.

[0183] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0184] The above are only preferred embodiments of the utility model embodiments, and are not intended to limit the utility model embodiments. For those skilled in the art, the utility model embodiments may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model embodiments shall be included in the protection scope of the utility model embodiments.

Claims

1. A relay, characterized in that: include: A shell, wherein the shell has a length direction, a width direction and a height direction that are perpendicular to each other; A fixing frame, the fixing frame is fixedly connected to the shell, and the length direction of the fixing frame is consistent with the length direction of the shell; a contact portion having a closed position and an open position; A magnetic circuit part, the magnetic circuit part includes a coil assembly and an armature assembly, the axial direction of the coil assembly is consistent with the length direction of the shell, and the coil assembly, the armature assembly and the contact part are arranged along the height direction of the shell; the armature assembly is rotatably mounted on the fixing frame; the coil assembly is used to drive the armature assembly to swing around a set axis to drive the contact part to move to a closed position or an open position; as well as An auxiliary switch, the auxiliary switch is mounted on the fixing frame, and along the length direction of the housing, the auxiliary switch is located on one side of the armature assembly, and the shortest distance between the auxiliary switch and the contact portion is greater than the shortest distance between the auxiliary switch and the coil assembly; The auxiliary switch is used to monitor whether the contact part is in the closed position or the open position.

2. The relay according to claim 1, characterized in that: The auxiliary switch includes an auxiliary moving spring and an auxiliary static spring, both of which are installed at one end of the fixed frame in the length direction; the auxiliary moving spring is provided with a first contact portion, and the auxiliary static spring is provided with a second contact portion; the auxiliary moving spring can move relative to the auxiliary static spring so that the first contact portion contacts or separates from the second contact portion.

3. The relay according to claim 2, characterized in that: The first contact portion is integrally formed with the auxiliary moving spring piece, and the second contact portion is integrally formed with the auxiliary stationary spring piece.

4. The relay according to claim 2, characterized in that: The first contact portion includes at least one protrusion, and line-surface contact is formed between the protrusion and the second contact portion.

5. The relay according to claim 4, characterized in that: The auxiliary movable spring has a first end and a second end opposite to each other, the first end is used to connect to the circuit board, the second end is located inside the shell, and the part of the auxiliary movable spring close to the second end is bent toward the auxiliary static spring to form the protrusion.

6. The relay according to claim 4, characterized in that: The number of the protrusions is two, and a buffer space is provided between the two protrusions.

7. The relay according to claim 6, characterized in that: The buffer space is a strip-shaped hole, and at least a portion of the strip-shaped hole is disposed at a position where the auxiliary movable spring piece is bent toward the auxiliary static spring piece.

8. The relay according to claim 2, characterized in that: The auxiliary movable spring is provided with a metal layer at least on a surface of the first contact portion facing the second contact portion, and the auxiliary static spring is provided with a metal layer at least on a surface of the second contact portion facing the first contact portion.

9. The relay according to claim 2, characterized in that: The second contact portion is a protrusion disposed toward the auxiliary movable spring, or a surface of the second contact portion in contact with the first contact portion and a surface of the auxiliary static spring facing the auxiliary movable spring are coplanar.

10. The relay according to any one of claims 1 to 9, characterized in that: The coil assembly includes a coil body, an iron core is arranged inside the coil body, one end of the iron core is connected to a first yoke, and the other end of the iron core is connected to a second yoke; the armature assembly includes a fixing member and a first armature and a second armature partially covered in the fixing member, one of the fixing member and the fixing frame is provided with a rotating shaft, and the other is provided with an axial hole, the rotating shaft matches the axial hole, and the set axis is the axis of the rotating shaft; The first yoke is located at one end of the first armature and the second armature, and the second yoke is located at the other end of the first armature and the second armature; in the closed position, the first armature is attracted to the second yoke, and the second armature is attracted to the first armature; in the open position, the first armature is attracted to the first yoke, and the second armature is attracted to the second yoke.

11. The relay according to claim 10, characterized in that: The first yoke includes a first vertical portion and a first transverse portion, the second yoke includes a second vertical portion and a second transverse portion, the first vertical portion and the second vertical portion both extend along the height direction of the shell, and the first transverse portion and the second transverse portion both extend along the length direction of the shell; a first avoidance space is formed between the first vertical portion and the side wall of the shell to which it is close, for avoiding the auxiliary switch; the length of the first transverse portion is smaller than the length of the second transverse portion; the length of the first armature is larger than the length of the second armature.

12. The relay according to any one of claims 2 to 9, characterized in that: The contact part includes a first movable spring part and a second movable spring part, the first movable spring part includes a first movable spring piece, a first movable contact and a first static contact; the second movable spring part includes a second movable spring piece, a second movable contact and a second static contact, the first movable contact of the first movable spring part corresponds to the position of the second static contact of the second movable spring part, and the second movable contact of the second movable spring part corresponds to the position of the first static contact of the first movable spring part; In the closed position, the first movable contact contacts the second stationary contact, and the second movable contact contacts the first stationary contact; In the disconnected position, the first movable contact is separated from the second stationary contact, and the second movable contact is separated from the first stationary contact.

13. The relay according to claim 12, characterized in that: The armature assembly has a first arm and a second arm; The relay further includes two pushers, the two pushers are respectively a first pusher and a second pusher; one end of the first pusher is connected to the first support arm, and the other end of the first pusher is connected to the first moving contact through the first moving spring; one end of the second pusher is connected to the second support arm, and the other end of the second pusher is connected to the second moving contact through the second moving spring; The auxiliary movable spring is connected to one of the pushers, and the pusher connected to the auxiliary movable spring can drive the auxiliary movable spring to move relative to the auxiliary static spring, wherein in the closed position, the first contact portion is in contact with the second contact portion; in the open position, the first contact portion is separated from the second contact portion.

14. The relay according to claim 13, characterized in that: The pushing member connected to the auxiliary movable spring is provided with a clamping groove; the end of the auxiliary movable spring close to the first contact portion is limited in the clamping groove.

15. The relay according to claim 14, characterized in that: Both groove walls of the clamping groove are provided with convex ribs, and the convex ribs are in contact with the auxiliary movable spring.

16. The relay according to claim 12, characterized in that: The first movable spring part also includes a first lead-out piece, and the second movable spring part also includes a second lead-out piece; one end of the first lead-out piece is connected to the first movable spring piece, and one end of the second lead-out piece is connected to the second movable spring piece, and the other ends of the first lead-out piece and the second lead-out piece are both extended from the shell; the first lead-out piece includes a horizontal plate and a vertical plate, the extension direction of the horizontal plate is consistent with the length direction of the shell, and the extension direction of the vertical plate is consistent with the height direction of the shell; the shell includes a base and a cover body, along the length direction of the shell, the base has a first side wall and a second side wall opposite to each other, the first side wall includes a first sub-wall and a second sub-wall, the first sub-wall and the second sub-wall are spaced apart to form a channel for the horizontal plate to extend; the distance between the second sub-wall and the second side wall is smaller than the distance between the first sub-wall and the second side wall, so that an accommodating space is formed between the outer surface of the second sub-wall and the plane where the outer surface of the first sub-wall is located, and at least part of the vertical plate is located in the accommodating space.

17. The relay according to claim 16, characterized in that The cover body is provided with an avoidance groove on the surface corresponding to the first side wall, and the avoidance groove penetrates the cover body along the width direction of the shell; the transverse plate is provided with a widened portion along the width direction of the shell, and the widened portion is located in the avoidance groove.

18. The relay according to any one of claims 2 to 9, characterized in that: The coil assembly also includes a coil pin, one end of which extends to the outside of the shell for connection with a circuit board, and ends of the coil pin, the auxiliary moving spring and the auxiliary static spring for connection with the circuit board are spaced apart along the height direction of the shell.

19. The relay according to any one of claims 1 to 9, characterized in that: An installation groove is provided in the shell, and a first magnetic isolation portion is installed in the installation groove. Along the length direction of the shell, the first magnetic isolation portion is located between the coil assembly and the side wall of the shell.

20. The relay according to claim 19, characterized in that An escape space is provided on an end surface of one end of the coil assembly in the length direction, and the first magnetic isolation portion is located in the escape space.

21. The relay according to any one of claims 1 to 9, characterized in that: It also includes a shielding cover, which includes a U-shaped plate structure, and the U-shaped plate structure includes a first clamping plate, a second clamping plate and a connecting plate connected between the first clamping plate and the second clamping plate, the connecting plate is located outside the side wall of the shell close to the coil assembly, and the first clamping plate and the second clamping plate are respectively located on both sides of the width direction of the shell.

22. The relay according to claim 21, characterized in that One side of the shell in the width direction has a first outer surface, the first outer surface is provided with a groove, and at least a part of the first clamping plate is located in the groove along the width direction of the shell.

23. The relay according to claim 22, characterized in that The surface of the first clamping plate facing away from the second clamping plate is flush with the outer surface of the housing where the groove is provided.

24. The relay according to claim 22, characterized in that The first clamping plate is provided with a positioning hole, the bottom of the groove is provided with a positioning protrusion, and the positioning protrusion is limited to the positioning hole.

25. The relay according to claim 22, characterized in that The first outer surface is provided with a through hole, the through hole is spaced apart from the groove, and the through hole is used for allowing the reed of the auxiliary switch and the coil pin of the coil assembly to pass through the housing.

26. The relay according to claim 21, characterized in that The shielding cover also includes side plates, and the side plates are connected to the U-shaped plate structure.

27. The relay according to claim 26, characterized in that The outer surface of the side plate is provided with a second magnetic isolation portion.

28. The relay according to any one of claims 1 to 9, characterized in that: It also includes an arc extinguishing grid, the housing is provided with a mounting position, and the arc extinguishing grid is mounted on the mounting position.

29. An electric meter, characterized in that: A relay comprising the relay of any one of claims 1 to 28.

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