Low power contactor

Abstract

The utility model relates to the field of low voltage electrical apparatus, concretely relates to a low power consumption contactor, through buckle assembly and spacing structure spacing cooperation lock the movable contact in the closing position to maintain the attraction state between movable core and static core, the coil can be powered off after closing to save energy, and the spacing structure is directly arranged on the contact support, and moves synchronously with the contact support, movable contact and movable core, ensures reliable locking of the movable contact with the buckle assembly cooperation, also simplifies the structure, after the contactor completes closing, because the mechanical lock structure formed by the spacing piece and buckle piece is relied on to maintain the attraction state between movable core and static core, the attraction state between movable core and static core will not be affected through the control assembly control coil assembly power off, can greatly reduce the power consumption, when opening or fault, through the trigger mechanism acting on the release buckle structure, drives the release buckle structure to drive the buckle assembly to remove the spacing of spacing structure, to remove the spacing of movable contact.

Description

TECHNICAL FIELD

[0001] The utility model relates to low voltage electric appliance field, concretely relates to a low power consumption contactor. BACKGROUND

[0002] As a kind of low voltage control electric appliance, contactor can be remotely frequently connected and disconnected main circuit and large capacity control circuit, also have the characteristics of low cost and production convenience, therefore be widely used in industrial production, transportation, modern agriculture and people's daily life etc.

[0003] Most contactors on market adopt double coil structure of starting coil and maintaining coil now, after starting coil completes dynamic, static iron core attraction with large current, it will switch to maintaining coil to pass small current to make dynamic, static iron core keep attraction, to maintain dynamic, static iron core attraction state with small current.

[0004] In addition, single contactor itself does not contain protection function, needs to rely on other protection electric appliance in line, which not only increases cost, also makes line become more complex. UTILITY MODEL CONTENTS

[0005] The utility model aims at overcoming at least one defect of prior art, and provides a low power consumption contactor.

[0006] To realize the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] Low power consumption contactor, including shell, respectively setting in shell's dynamic contactor subassembly, dynamic iron core, reset spring, coil subassembly and at least one group static contactor subassembly, dynamic contactor subassembly includes contactor support and the dynamic contact that sets on contactor support, static contactor subassembly at least includes respectively with the first static contact and the second static contact corresponding to the two ends of dynamic contact, dynamic iron core is connected with dynamic contactor subassembly, the coil subassembly energization drives dynamic iron core, makes dynamic iron core drive dynamic contact from the position of opening to the position of closing, connect the first static contact and the second static contact, the coil subassembly is disconnected, and the reset spring can drive dynamic contact from the position of closing to the position of opening, disconnect the first static contact and the second static contact, the low power consumption contactor further includes respectively setting in shell's trigger mechanism and buckle mechanism, the buckle mechanism includes at least one unlocking structure and at least one group buckle subassembly, dynamic contactor subassembly includes the limiting structure that sets on contactor support, the buckle subassembly is limited with limiting structure limit cooperation, limit dynamic contact in the position of closing and cannot move to the position of opening;Trigger mechanism drives unlocking structure to drive buckle subassembly to remove the limiting of limiting structure when acting on unlocking structure, to remove the limiting of dynamic contact.

[0008] Optionally, each buckle assembly comprises at least one buckle member and an elastic structure corresponding to the buckle member, the unlocking structure is connected with the buckle member, the limiting structure comprises a limiting member corresponding to the buckle member, and the buckle assembly is limited and matched by the buckle member and the corresponding limiting member to limit the movable contact in the closed position and unable to move to the open position.

[0009] Optionally, each buckle member is provided with a buckle part, when the movable contact moves from the open position to the closed position, the limiting member acts on the buckle part to drive the buckle member to move against the force of the elastic structure, then when the movable contact continues to move to the closed position, the elastic structure drives the buckle member to drive the buckle part to be limited and matched with the limiting member to limit the movable contact in the closed position; when the trigger mechanism acts on the unlocking structure, the unlocking structure drives the buckle member to move against the force of the elastic structure, the buckle member is separated from the limiting member through the buckle part to release the limitation on the movable contact, and the movable contact moves to the open position under the action of the return spring, and then the buckle member is reset under the action of the elastic structure.

[0010] Optionally, the buckle part comprises an action surface and a limiting surface, the action surface is located on the movement track of the limiting member when the movable contact moves from the open position to the closed position, and the limiting surface is located on the movement track of the limiting member when the movable contact moves from the closed position to the open position.

[0011] Optionally, the contact support is arranged to move linearly, the limiting member is a circular shaft structure arranged to move linearly synchronously with the contact support, the buckle part is a triangular protruding structure protruding on the side edge of the buckle member, the inclined edge of the buckle part serves as the action surface and is arranged to be inclined to the movement direction of the limiting member, and the straight edge of the buckle part serves as the limiting surface and is arranged to be perpendicular to the movement direction of the limiting member.

[0012] Optionally, the buckle member is arranged to rotate, and the rotation center thereof is O1; when the movable contact is located in the closed position, the frictional force applied by the limiting member to the buckle member is F1, the force arm thereof is L1, the force applied by the return spring to the buckle member is F2, the force arm thereof is L2, the force applied by the elastic structure to the buckle member is F3, the force arm thereof is L3, and the force applied by the trigger mechanism to the buckle member through the unlocking structure is F4, the force arm thereof is L4, the forces F2 and F3 respectively have components in the direction of force F1, the force F4 has a component in the opposite direction of force F1, and F4L4>F1L1+F2L2+F3L3.

[0013] Optionally, when the movable contact is located in the closed position, the action position O2 of the buckle member and the limiting member is located on one side of the line segment between the connection position of the buckle member and the unlocking structure and the rotation center O1 of the buckle member, and the action position of the buckle member and the elastic structure is located on the other side of the line segment between the connection position of the buckle member and the unlocking structure and the rotating center O1 of the buckle member.

[0014] Optionally, the rotating center direction of the buckle member, the direction of force F1 and the direction of force F2 are perpendicular to each other, when the movable contact is in the closed position, the action point O2 of the buckle member and the limiting member is located between the connection position of the buckle member and the buckle release structure and the rotating center O1 of the buckle member in the direction of force F1, and the action point O2 of the buckle member and the limiting member is away from the connection position of the buckle member and the buckle release structure and close to the rotating center O1 of the buckle member in the direction of force F1.

[0015] Optionally, the limiting member acts on the buckle member through a rolling bearing, and the rolling bearing is sleeved on the outer side of the limiting member.

[0016] Optionally, at least two trigger mechanisms are provided, which are a magnetic protection mechanism and a thermal protection mechanism, and the buckle mechanism includes two buckle release structures, which are a first buckle release structure and a second buckle release structure corresponding to the magnetic protection mechanism and the thermal protection mechanism respectively.

[0017] Each group of buckle assemblies includes two buckle members and two elastic structures corresponding to the two buckle members, the two buckle members are a first buckle member and a second buckle member connected with the first buckle release structure and the second buckle release structure respectively and arranged to move synchronously, and the first buckle member and the second buckle member of the same group of buckle assemblies are arranged to rotate synchronously.

[0018] When the magnetic protection mechanism acts on the first buckle release structure, the first buckle release structure drives the first buckle member to release the limiting of the corresponding limiting member, and the first buckle release structure also drives the second buckle member to release the limiting of the corresponding limiting member through the first buckle member; when the thermal protection mechanism acts on the second buckle release structure, the second buckle release structure drives the second buckle member to release the limiting of the corresponding limiting member, and the second buckle release structure also drives the first buckle member to release the limiting of the corresponding limiting member through the second buckle member.

[0019] Optionally, the two elastic structures of the same group of buckle assemblies are the same elastic structure, which is a shared elastic member, and the two ends of the shared elastic member are connected with the first buckle member and the second buckle member of the same group of buckle assemblies respectively.

[0020] Optionally, a magnetic flux mechanism corresponding to the second buckle release structure is further provided as another trigger mechanism, when the magnetic flux mechanism acts on the second buckle release structure, the second buckle release structure drives the second buckle member to release the limiting of the corresponding limiting member, and the second buckle release structure also drives the first buckle member to release the limiting of the corresponding limiting member through the second buckle member.

[0021] Optionally, the rotating centers of the first buckle member and the second buckle member of the same group of buckle assemblies are arranged in parallel and at intervals, and the first buckle member and the second buckle member of the same group of buckle assemblies are engaged and connected.

[0022] Optionally, the first static contact and the second static contact of the same static contact assembly are located on both sides of the contact support in the first direction and below the corresponding movable contact in the second direction;

[0023] The first deblocking member of the buckle mechanism is below the first static contact in the second direction, the second deblocking member of the buckle mechanism is below the second static contact in the second direction, and the first deblocking member and the second deblocking member are located on both sides of the contact support in the first direction, and the buckle assembly of the buckle mechanism is located on the side of the contact support in the third direction;

[0024] The movable iron core is below the contact support and above the coil assembly in the second direction;

[0025] The first direction, the second direction and the third direction are perpendicular to each other.

[0026] Optionally, it is a multi-phase contactor, comprising a plurality of static contact assemblies connected with the multi-phase respectively, a plurality of movable contacts corresponding to the plurality of static contact assemblies respectively, a plurality of magnetic protection mechanisms corresponding to the first static contact of the plurality of static contact assemblies respectively, a plurality of thermal protection mechanisms corresponding to the second static contact of the plurality of static contact assemblies respectively, and the plurality of static contact assemblies, the plurality of movable contacts, the plurality of magnetic protection mechanisms and the plurality of thermal protection mechanisms are arranged along the third direction respectively;

[0027] The first deblocking member is a long rod structure with the length direction arranged along the third direction, and is located between the plurality of magnetic protection mechanisms and the contact support in the first direction, and the first deblocking member is provided with a plurality of first driven parts corresponding to the plurality of magnetic protection mechanisms respectively; each magnetic protection mechanism comprises a magnetic yoke, an armature and an armature spring connected with the armature, the armature is rotatably arranged below the magnetic yoke, the first static contact passes through the space enclosed by the magnetic yoke and the armature of the corresponding magnetic protection mechanism and is connected with the magnetic yoke, and the armature of each magnetic protection mechanism is provided with a first driving part driving matched with the first driven part in the direction of the first deblocking member;

[0028] And / or, the second deblocking member is a long rod structure with the length direction arranged along the third direction, and the second deblocking member is provided with a plurality of second driven parts corresponding to the plurality of thermal protection mechanisms respectively; the thermal protection mechanism is a bimetallic strip, and is located between the second deblocking member and the second static contact in the second direction, one end of each bimetallic strip is connected to the corresponding second static contact, the other end of each bimetallic strip is a second driving part driving matched with the second driven part and is arranged obliquely to the second deblocking member.

[0029] Optionally, the shell comprises a cover connected with an upper base and a lower base, the upper base is located above the lower base in the second direction, the moving contact assembly, the static contact assembly, the magnetic protection mechanism, the thermal protection mechanism and the buckle mechanism connected with the moving iron core are respectively arranged on the upper base to form an upper base module; the reset spring and the coil assembly are respectively arranged in the lower base to form a lower base module.

[0030] Optionally, the low-power contactor further comprises a control assembly, the control assembly comprises a control switch, the moving contact triggers the control switch when being located at the closed position, and the control assembly controls the coil assembly to be powered off.

[0031] Optionally, the low-power contactor comprises a protection mechanism as a trigger mechanism, the protection mechanism acts on the release structure when the contactor fails, and drives the release structure to drive the buckle assembly to release the limiting of the limiting structure.

[0032] Optionally, the low-power contactor comprises a trigger mechanism, which is used for acting on the release structure according to the received opening signal, and driving the release structure to drive the buckle assembly to release the limiting of the limiting structure.

[0033] The low-power contactor of the utility model, through the buckle assembly and the limiting structure limiting cooperation lock the moving contact in the closed position to maintain the attraction state between the moving iron core and the static iron core, the coil can be powered off after completing the closing to save energy, and the limiting structure is directly arranged on the contact support, and moves synchronously with the contact support, the moving contact and the moving iron core, so that reliable locking of the moving contact is ensured by cooperation with the buckle assembly, and the structure is also simplified, after the contactor completes the closing, the attraction state between the moving iron core and the static iron core is maintained by the mechanical locking structure formed by the limiting piece and the buckle piece, and the attraction state between the moving iron core and the static iron core will not be affected by controlling the coil assembly to be powered off, so that the power consumption can be greatly reduced; when opening or failing, the trigger mechanism acts on the release structure, drives the release structure to drive the buckle assembly to release the limiting of the limiting structure, so that the limiting of the moving contact is released.

[0034] In addition, since the action position O2 of the buckle piece and the limiting piece is located between the connection position of the buckle piece and the release structure and the rotation center O1 of the buckle piece in the direction of force F1, the force F2 of the reset spring will exert a counterclockwise torque on the buckle piece, so that the buckle piece has a tendency to swing to the middle, the mechanical locking structure is more reliable, and the release is not laborious.

[0035] In addition, the contactor is provided with a magnetic protection mechanism and a thermal protection mechanism, the magnetic protection mechanism drives the first release piece to release the mechanical locking structure, the thermal protection mechanism drives the second release piece to release the mechanical locking structure, and the contactor has the functions of thermal and magnetic protection, so that the use safety is improved. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 is the assembly view of the contactor of the utility model;

[0037] Figure 2 is the exploded view of the contactor of the utility model;

[0038] Figure 3 is the sectional view of the contactor of the utility model when the mechanical lock catch structure is in the buckling state;

[0039] Figure 4 is the sectional view of the contactor of the utility model when the mechanical lock catch structure is in the unbuckling state;

[0040] Figure 5 is the force analysis diagram of the contactor of the utility model when the mechanical lock catch structure is in the buckling state;

[0041] Figure 6 is the exploded view of the buckle mechanism of the utility model removing the common elastic member;

[0042] Figure 7 is the assembly view of the buckle mechanism of the utility model removing the common elastic member;

[0043] Figure 8 is the exploded view of the movable contact assembly of the utility model;

[0044] Figure 9 is the exploded view of the first stationary contact and the magnetic yoke of the utility model;

[0045] Figure 10 is the assembly view of the first stationary contact and the magnetic yoke of the utility model;

[0046] Figure 11 is the exploded view of the second stationary contact and the bimetallic strip of the utility model;

[0047] Figure 12 is the assembly view of the second stationary contact and the bimetallic strip of the utility model;

[0048] Figure 13 is the exploded view of the upper base, the stationary contact assembly, the magnetic yoke and the bimetallic strip of the utility model;

[0049] Figure 14 is the assembly view of the upper base, the stationary contact assembly, the magnetic yoke and the bimetallic strip of the utility model;

[0050] Figure 15 is the exploded view of the upper base module removing the movable iron core assembly of the utility model;

[0051] Figure 16 is the assembly view of the upper base module removing the movable iron core assembly of the utility model;

[0052] Figure 17Is the exploded view of the upper base module of the utility model;

[0053] Figure 18 Is the front assembled view of the upper base module of the utility model;

[0054] Figure 19 Is the back assembled view of the upper base module of the utility model;

[0055] Figure 20 Is the exploded view of the lower base module of the utility model;

[0056] Figure 21 Is the assembled view of the lower base module of the utility model.

[0057] Housing 100;Upper base 110;First installation slot 111;Second installation slot 112;Separation room 113;Partition plate 1131;Guide slot 1132;Fourth installation slot 114;Buckle piece rotating shaft hole 1141;Fifth installation slot 115;First containing slot 116;Armature rotating shaft hole 1161;Second containing slot 117;First communication hole 118;Second communication hole 119;Lower base 120;Power supply interface 121;Second spring limiting part 122;Cover plate 130;Second armature spring hook 131;Cover 140;Magnetic flux cover 150;

[0058] Moving contact assembly 200;Contact support 210;Support part 211;Positioning groove 212;Connecting rib 213;Installation block 214;Avoidance groove 215;Mounting hole 216;Moving contact 220;Limiting piece 230;Rolling bearing 240;

[0059] Moving iron core assembly 300;Moving iron core 310;Moving iron core transverse part 311;Moving iron core longitudinal part 312;Moving iron core rod 313;Moving iron core seat 320;First positioning boss 321;Extension hole 322;Supporting part 323;First spring limiting part 324;Moving iron core cover 330;Second positioning boss 331;

[0060] Static contact assembly 400;First static contact 410;Second static contact 420;

[0061] Magnetic protection mechanism 510;Magnetic yoke 511;Armature 512;Armature rotating shaft 5121;First armature spring hook 5122;First driving part 5123;Bimetallic strip 520;Second driving part 521;Magnetic flux mechanism 530;

[0062] Buckling mechanism 600; first unbuckling member 610; first driven part 611; second unbuckling member 620; second driven part 621; adjusting screw 622; third driven part 623; buckling assembly 630; buckling part 6301; acting surface 6302; limiting surface 6303; buckling member longitudinal part 6304; buckling member transverse part 6305; buckling member pivot 6306; elastic member limiting part 6307; first buckling member 6310; engaging concave part 6311; second buckling member 6320; engaging convex part 6321; shared elastic member 6330;

[0063] Coil assembly 700; coil 710; coil skeleton 720; static iron core 730;

[0064] Reset spring 800;

[0065] Control assembly 900; control switch 910. DETAILED DESCRIPTION

[0066] The following embodiments combined with the drawings further illustrate the specific implementation of the low-power contactor of the utility model. The low-power contactor of the utility model is not limited to the description of the following embodiments.

[0067] As Figures 1-2As shown in Figures 8, 19, and 21, the low-power contactor of this embodiment includes a housing 100, a moving contact assembly 200, a moving iron core 310, a return spring 800, a coil assembly 700, and at least one set of stationary contact assemblies 400, all disposed within the housing 100. The coil assembly 700 typically includes a coil 710, a coil frame 720, and a stationary iron core 730. The stationary iron core 730 is disposed opposite to the moving iron core 310. The coil 710 is wound on the outside of the coil frame 720 and is located within the space enclosed by the stationary iron core 730 and the moving iron core 310. The moving contact assembly 200 includes a contact support 210 and a moving contact 220 disposed on the contact support 210 and corresponding to the stationary contact assembly 400. Each stationary contact assembly 400 includes at least a first stationary contact 410 and a second stationary contact 420, which serve as the input and output terminals respectively and correspond to the two ends of the moving contact 220. The moving iron core 310 is connected to the moving contact assembly 200. When the coil 710 of the coil assembly 700 is energized, the stationary iron core 730 is magnetized, driving the moving iron core 310 to move towards the stationary iron core 730 until it is attracted to the stationary iron core 730. This causes the moving iron core 310 to drive the moving contact 220 to move linearly from the open position to the closed position against the force of the return spring 800. The two ends of the moving contact 220 contact the first stationary contact 410 and the second stationary contact 420 respectively, thus connecting the first stationary contact 410 and the second stationary contact 420, and the main circuit of the contactor is connected. When the coil 710 of contactor 700 is de-energized, the magnetic attraction between the moving iron core 310 and the stationary iron core 730 disappears. The return spring 800 drives the moving iron core 310 to move away from the stationary iron core 730 until it separates from it. This causes the moving iron core 310 to move the moving contact 220 linearly from the closed position to the open position. The two ends of the moving contact 220 separate from the first stationary contact 410 and the second stationary contact 420 respectively, thus disconnecting the first and second stationary contacts 410 and breaking the main circuit of the contactor. The return spring 800 can be one or more; in some contactors, each group of stationary contact assemblies 400 can include four stationary contacts to achieve normally open and normally closed contact functions, which is prior art in this field.

[0068] In particular, such as Figures 3-7 As shown in Figure 15, the low-power contactor also includes a trigger mechanism and a latching mechanism 600 respectively disposed within the housing 100. The latching mechanism 600 includes at least one unlocking structure and at least one set of latching components 630. The unlocking structure is connected to the latching components 630. The moving contact assembly 200 also includes a limiting structure disposed on the contact support 210, such as... Figure 3As shown, the latching assembly 630 cooperates with the limiting structure to limit the moving contact 220 in the closed position and prevent it from moving to the open position. At this time, regardless of whether the coil 710 is energized or de-energized, the moving contact 220 remains connected to the first stationary contact 410 and the second stationary contact 420, and the main circuit of the contactor is connected; Figure 4 As shown, when the triggering mechanism acts on the release structure, it drives the release structure to move the latching assembly 630 to release the limit on the limiting structure, thereby releasing the limit on the moving contact 220. At this time, the moving contact 220 can move to the open position under the force of the return spring 800, disconnecting the first stationary contact 410 and the second stationary contact 420, and the main circuit of the contactor is disconnected. The triggering mechanism has several embodiments. One triggering mechanism is a protection mechanism that acts on the release structure when the contactor malfunctions (e.g., overload or short circuit), driving the release structure to move the latching assembly 630 to release the limit on the limiting structure, realizing the opening protection when the contactor malfunctions, making the contactor have its own protection mechanism, simplifying the circuit structure, and reducing costs. Another triggering mechanism can be an electrically operated magnetic flux mechanism 530 or a manually operated button, etc., which can actively act on the release structure when the contactor is normal, realizing normal opening of the contactor. The magnetic flux mechanism 530 acts on the release structure according to the received opening signal, and the button is driven by external force to act on the release structure.

[0069] The low-power contactor in this embodiment uses a latching assembly 630 and a limiting structure to lock the moving contact 220 in the closed position to maintain the attraction state between the moving iron core 310 and the stationary iron core 730. The coil 710 can be de-energized after closing to save energy. The limiting structure is directly set on the contact support 210 and moves synchronously with the contact support 210, the moving contact 220 and the moving iron core 310, ensuring reliable locking of the moving contact 220 in cooperation with the latching assembly 630, and also simplifying the structure.

[0070] Specifically, each set of buckle components 630 includes at least one buckle member and an elastic structure corresponding to the buckle member. The unbuckled structure is connected to the buckle member, and the limiting structure includes a limiting member 230 corresponding to the buckle member. Figure 8 The latching assembly 630, through the latching component and the corresponding limiting component 230, limits the moving contact 220 to the closed position and prevents it from moving to the open position. That is, the mechanical locking structure formed by the latching component and the limiting component 230 is in a latching state.

[0071] Furthermore, such as Figure 2 , 20As shown in FIG. 21, the low-power contactor of this embodiment further includes a control component 900. The control component 900 includes a control switch 910. When the moving contact 220 is in the closing position, it triggers the control switch 910, causing the control component 900 to control the coil component 700 to cut off power. It should be noted that the control component 900 usually further includes a circuit board provided with a control circuit and a power supply terminal provided on the circuit board and supplying power to the control circuit. The circuit board is electrically connected to the coil 710 of the coil component 700. A power supply interface 121 corresponding to the power supply terminal is provided on the outer shell 100. An external power supply is connected into the power supply interface 121 as the power supply of the control circuit; the control switch 910 is preferably a micro switch. When the power supply of the control circuit is connected, the coil 710 is powered on, and the static iron core 730 is magnetized to attract the moving iron core 310 to drive the moving contact 220 to move downward, so that the moving contact 220 contacts the first static contact 410 and the second static contact 420, and the main circuit of the contactor is connected. The moving iron core 310 also drives the limiting member 230, so that the mechanical locking structure formed by the buckling member and the limiting member 230 is in a buckled state, as Figure 3 shown; after the contactor completes closing, when the moving contact 220 is in the closing position, the moving iron core 310 also triggers the control switch 910. The control switch 910 issues a power-off command to the circuit board. After the circuit board controls the coil 710 to cut off power, the magnetic attraction force between the moving iron core 310 and the static iron core 730 disappears. However, since the mechanical locking structure is in a buckled state, the moving contact 220 still contacts the first static contact 410 and the second static contact 420, and the main circuit of the contactor remains in a conducting state. After the contactor completes closing, due to relying on the mechanical locking structure formed by the limiting member 230 and the buckling member to maintain the attracting state between the moving iron core 310 and the static iron core 730, controlling the coil component 700 to cut off power by the control component 900 will not affect the attracting state between the moving iron core 310 and the static iron core 730, which can greatly reduce the power consumption.

[0072] As Figures 3-7 shown in FIGS. 14 and 15, each buckling member is respectively provided with a buckling portion 6301. When the moving contact 220 moves from the opening position to the closing position, it first acts on the buckling portion 6301 through the limiting member 230 to drive the buckling member to move against the acting force of the elastic structure. Then, when the moving contact 220 continues to move to the closing position, the elastic structure drives the buckling member to带动 the buckling portion 6301 to be in limiting cooperation with the limiting member 230, limiting the moving contact 220 in the closing position; when the triggering mechanism acts on the unlocking structure, the unlocking structure first带动 the buckling member to move against the acting force of the elastic structure. The buckling member is separated from the limiting member 230 through the buckling portion 6301 to解除 the limitation on the moving contact 220, so that the moving contact 220 moves to the opening position under the acting force of the return spring 800. Then, the buckling member is reset under the acting force of the elastic structure.

[0073] Further, the buckle portion 6301 includes a working surface 6302 and a limiting surface 6303. When the moving contact 220 moves from the opening position to the closing position, the working surface 6302 is located on the moving track of the limiting member 230. When the moving contact 220 moves from the closing position to the opening position, the limiting surface 6303 is located on the moving track of the limiting member 230.

[0074] Preferably, as Figures 6-8 shown, the contact support 210 is linearly movably arranged, the limiting member 230 is a circular shaft structure linearly movably arranged synchronously with the contact support 210, the buckle portion 6301 of the buckle member is a triangular protrusion structure protruding from the side edge of the buckle member, the hypotenuse of the buckle portion 6301 serves as the working surface 6302, is inclined to the moving direction of the limiting member 230, and the straight edge of the buckle portion 6301 serves as the limiting surface 6303, is perpendicular to the moving direction of the limiting member 230. Of course, as other embodiments, the buckle portion 6301 can also be a circular shaft structure arranged on the buckle member, and the limiting member 230 is provided with a triangular protrusion structure cooperating with the circular shaft structure.

[0075] As Figure 5 shown, the buckle member is rotatably arranged, and its rotation center is O1; when the moving contact 220 is in the closing position, the frictional force applied by the limiting member 230 to the buckle member is F1, and its force arm is L1. The force arm L1 refers to the distance between the acting point O2 of the buckle member and the limiting member 230 and the rotation center O1 of the buckle member in the perpendicular direction of the force F1 direction; the acting force applied by the return spring 800 to the buckle member is F2, and its force arm is L2. The force arm L2 refers to the distance between the acting point O2 of the buckle member and the limiting member 230 and the rotation center O1 of the buckle member in the perpendicular direction of the force F2 direction; the acting force applied by the elastic structure to the buckle member is F3, and its force arm is L3. The force arm L3 refers to the distance between the acting point of the buckle member and the elastic structure and the rotation center O1 of the buckle member in the perpendicular direction of the force F3 direction; the acting force applied by the trigger mechanism to the buckle member through the unlocking structure is F4, and its force arm is L4. The force arm L4 refers to the distance between the connection point of the buckle member and the unlocking structure and the rotation center O1 of the buckle member in the perpendicular direction of the force F4 direction; the forces F2 and F3 respectively have component forces in the direction of the force F1, the force F4 has a component force in the opposite direction of the force F1 direction, and F4L4 > F1L1 + F2L2 + F3L3.

[0076] Preferably, the rotation center direction, force F1 direction, and force F2 direction of the latching member are perpendicular to each other. The lever arm L1 refers to the distance between the point of action O2 of the latching member and the limiting member 230 and the rotation center O1 of the latching member in the force F2 direction, and the lever arm L2 refers to the distance between the point of action O2 of the latching member and the limiting member 230 and the rotation center O1 of the latching member in the force F1 direction. When the moving contact 220 is in the closed position, the point of action O2 of the latching member and the limiting member 230 is located between the connection between the latching member and the unlocking structure and the rotation center O1 of the latching member in the force F1 direction. Moreover, the point of action O2 of the latching member and the limiting member 230 is far away from the connection between the latching member and the unlocking structure and close to the rotation center O1 of the latching member in the force F1 direction. That is, a smaller L2 and a larger L4 are set. Since the point of action O2 of the latching and limiting components 230 is located between the connection between the latching and unlocking structure and the rotation center O1 of the latching in the direction of force F1, the force F2 of the return spring 800 will apply a counterclockwise torque to the latching, causing the latching to tend to swing towards the center, making the mechanical locking structure more reliable and easy to unlock. Due to the presence of the elastic structure's force F3, F3 will naturally provide a counterclockwise torque to the latching. Therefore, under the premise of ensuring reliability, O2 and O1 can be set to be on the same straight line in the direction of F2, or even O2 can be set to be on the side of O1 away from the connection between the latching and unlocking structure in the direction of force F1. This can reduce the requirement for force F4 to a certain extent when the mechanical locking structure is unlocked.

[0077] Of course, if space permits, a smaller L2 should be preferred to avoid excessive reverse torque generated by force F2 during release, which would require a larger tripping force F4 from the triggering mechanism, making release difficult. If space permits, a larger L4 should be preferred to reduce the tripping force F4 required by the triggering mechanism during release, making release simpler and ensuring that the protection function can be triggered stably.

[0078] Preferred, such as Figure 8 As shown, the limiting member 230 acts on the snap-fit ​​member through the rolling bearing 240, which is sleeved on the outer side of the limiting member 230. The rolling bearing 240 on the outside of the limiting member 230 reduces friction F1, lowers the required tripping force F4 of the triggering mechanism, simplifies unlocking, and ensures stable triggering of the protection function.

[0079] Preferably, when the moving contact 220 is in the closed position, the point of action O2 of the latching member and the limiting member 230 is located on one side of the line connecting the connection between the latching member and the unlocking structure and the rotation center O1 of the latching member, while the point of action of the latching member and the elastic structure is located on the other side of the line connecting the connection between the latching member and the unlocking structure and the rotation center O1 of the latching member. The reasonable and compact layout of the latching member, the elastic structure, and the unlocking structure makes the force on the latching member more balanced, the latching more stable, and the unlocking simpler.

[0080] like Figure 4 , 15 As shown in Figure -16, the low-power contactor of this embodiment includes at least two triggering mechanisms, both of which are protection mechanisms: a magnetic protection mechanism 510 and a thermal protection mechanism. The latching mechanism 600 includes two unlocking structures, namely a first unlocking member 610 and a second unlocking member 620 corresponding to the magnetic protection mechanism 510 and the thermal protection mechanism, respectively. Each group of latching assemblies 630 includes two latching members and two elastic structures corresponding to the two latching members. The two latching members are a first latching member 6310 and a second latching member 6320 connected to and synchronously moving with the first unlocking member 610 and the second unlocking member 620, respectively. The first latching member 6310 and the second latching member 6320 of the same group of latching assemblies 630 rotate synchronously. When a short circuit fault occurs in the main circuit of the contactor, When the magnetic protection mechanism 510 acts on the first unlocking member 610, it drives the first unlocking member 610 to release the first locking member 6310 from the limit of the corresponding limiting member 230. At the same time, the first unlocking member 610 also drives the second locking member 6320 to release the limit of the corresponding limiting member 230 through the first locking member 6310. That is, the mechanical locking structure is unlocked, and the main circuit of the contactor is disconnected. When the main circuit of the contactor is overloaded for a long time, when the thermal protection mechanism acts on the second unlocking member 620, it drives the second unlocking member 620 to release the limit of the corresponding limiting member 230 through the second locking member 6320. At the same time, the second unlocking member 620 also drives the first locking member 6310 to release the limit of the corresponding limiting member 230 through the second locking member 6320. That is, the mechanical locking structure is unlocked, and the main circuit of the contactor is disconnected. The contactor is equipped with a magnetic protection mechanism 510, which drives the first release element 610 to release the mechanical locking structure, realizing tripping protection in case of short circuit fault. The contactor is also equipped with a thermal protection mechanism, which drives the second release element 620 to release the mechanical locking structure, realizing tripping protection in case of overload fault. The contactor itself has thermal and magnetic protection functions, improving safety in use.

[0081] like Figure 4 , 15As shown in Figure -16, the low-power contactor of this embodiment also includes a magnetic flux mechanism 530, which serves as another triggering mechanism and corresponds to the second release element 620. That is, the magnetic flux mechanism 530 and the thermal protection mechanism share the second release element 620, and the mechanical locking structure is released by acting on the second release element 620. When a tripping signal is actively given to the magnetic flux mechanism 530, the magnetic flux mechanism 530 acts on the second release element 620, driving the second release element 620 to release the second latching element 6320 from its limit on the corresponding limiting element 230. Simultaneously, the second release element 620 also drives the first latching element 6310 to release its limit on the corresponding limiting element 230 through the second latching element 6320, thus releasing the mechanical locking structure and disconnecting the main circuit of the contactor. The magnetic flux mechanism 530 within the contactor increases the function of manually operating the contactor to disconnect, and the shared second release element 620 between the magnetic flux mechanism 530 and the thermal protection mechanism facilitates a more reasonable and compact layout. Furthermore, the magnetic flux mechanism 530 is electrically connected to the circuit board of the control component 900. When the power supply to the contactor's control circuit is disconnected, the circuit board sends a tripping command to the magnetic flux mechanism 530, causing the magnetic flux mechanism 530 to actuate, thereby releasing the mechanical locking structure and disconnecting the main circuit of the contactor. Alternatively, in other embodiments, the magnetic flux mechanism 530 and the magnetic protection mechanism 510 may share the first release element 610, with the mechanical locking structure being released by acting on the first release element 610.

[0082] like Figures 3-4 As shown, the two elastic structures of the same group of snap-fit ​​components 630 are the same elastic structure, which is a shared elastic element 6330. The two ends of the shared elastic element 6330 are respectively connected to the first snap-fit ​​component 6310 and the second snap-fit ​​component 6320 of the same group of snap-fit ​​components 630. The two snap-fit ​​components share the same elastic structure (shared elastic element 6330), reducing the number of parts and simplifying the structure. Furthermore, the two snap-fit ​​components are driven to rotate by the shared elastic element 6330, ensuring the synchronous rotation of the two snap-fit ​​components. Of course, the two elastic structures of the same group of snap-fit ​​components 630 can also be independently set, consisting of two elastic elements with the same or different structures. More elastic elements can also be used. The elastic elements can be torsion springs, compression springs, tension springs, leaf springs, or other elastic deformation components or other elastic assemblies, etc.

[0083] like Figures 6-7As shown, the rotation centers of the first latching member 6310 and the second latching member 6320 of the same group of latching assemblies 630 are arranged parallel and spaced apart, and the first latching member 6310 and the second latching member 6320 of the same group of latching assemblies 630 are engaged and connected by an engagement structure. When one of them swings, the other will swing along with it under the action of the engagement structure, and the swing amplitude will be consistent. For example, the first latching member 6310 has an engagement recess 6311 on the side facing the second latching member 6320, and the second latching member 6320 has an engagement protrusion 6321 on the side facing the first latching member 6310. The engagement protrusion 6321 engages and connects within the engagement recess 6311. The engagement protrusion 6321 on the first latching member 6310 and the engagement recess 6311 on the second latching member 6320 form the engagement structure of this embodiment. Of course, as other embodiments, the rotation centers of the first fastener 6310 and the second fastener 6320 may coincide, or even the first fastener 6310 and the second fastener 6320 may be the same fastener.

[0084] Furthermore, the latching mechanism 600 of this embodiment includes two sets of latching components 630, which are symmetrically arranged on both sides of the first unfastening member 610 and the second unfastening member 620. The two ends of the first unfastening member 610 along its length are respectively connected to the first latching members 6310 of the two sets of latching components 630, and the two ends of the second unfastening member 620 along its length are respectively connected to the second latching members 6320 of the two sets of latching components 630. In this embodiment, the first unfastening member 610 and the first latching member 6310, and the second unfastening member 620 and the second latching member 6320, can be connected by screws, riveting, snap-fitting, or, of course, can be integrally connected. The latching mechanism 600 forms a closed frame structure, which is more stable, and the linkage between the first latching member 6310, the second latching member 6320, the first unfastening member 610, and the second unfastening member 620 is better, ensuring consistent action.

[0085] Specifically, the first fastener 6310 and the second fastener 6320 in this embodiment each include a fastener body. The fastener body is a T-shaped plate structure formed by connecting the fastener longitudinal portion 6304 and the fastener transverse portion 6305. The fastener longitudinal portion 6304 has a triangular protrusion structure as a fastener portion 6301 on one side away from the fastener transverse portion 6305. The fastener transverse portion 6305 has a fastener pivot 6306 that is rotatably connected to the outer shell 100 at the connection with the fastener longitudinal portion 6304. The fastener transverse portion 6305 has an elastic member limiting portion 6307 on one side away from the fastener longitudinal portion 6304. The first fastener 6310 and the second fastener 6320 have their fastening portions 6301 positioned opposite each other on their sides. The horizontal fastening portions 6305 of the first fastener 6310 and the second fastener 6320 are engaged at opposite ends, and the other ends of the horizontal fastening portions 6305 of the first fastener 6310 and the second fastener 6320 are respectively connected to the first unfastening member 610 and the second unfastening member 620. The two ends of the shared elastic member 6330 are respectively connected to the elastic member limiting portions 6307 of the first fastener 6310 and the second fastener 6320. The axis of the fastener shaft 6306 is the rotation center of the fastener. The fastener body and the fastener shaft 6306 can be separately mounted, with the fastener body fitted onto the fastener shaft 6306 through a hole. Alternatively, the fastener body and the fastener shaft 6306 can be integrally mounted.

[0086] like Figures 1-4 As shown in Figure 15, in the layout structure of the low-power contactor of this embodiment, the first stationary contact 410 and the second stationary contact 420 of the same group of stationary contact assemblies 400 are located on both sides of the contact support 210 in the first direction, and below the corresponding moving contact 220 in the second direction; the first unlocking member 610 of the latching mechanism 600 is located below the first stationary contact 410 in the second direction, the second unlocking member 620 of the latching mechanism 600 is located below the second stationary contact 420 in the second direction, and the first unlocking member 610 and the second unlocking member 620 are located on both sides of the contact support 210 in the first direction; the latching assembly 630 of the latching mechanism 600 is located to the side of the contact support 210 in the third direction; the moving iron core 310 is located below the contact support 210 and above the coil assembly 700 in the second direction. In this embodiment, the contact support 210 is linearly movable along the second direction; the rotation center of the latching member of the latching assembly 630 is set along the third direction. Wherein, the first direction, the second direction, and the third direction are perpendicular to each other, and the first direction is... Figure 1 The X direction is also the length direction of the contactor, and the second direction is... Figure 1 The Y direction is also the height direction of the contactor, and the third direction is... Figure 1 The Z-direction is also the width direction of the contactor.

[0087] Furthermore, the low-power contactor in this embodiment is a multi-phase contactor, including multiple sets of stationary contact assemblies 400 respectively connected to multiple phases, multiple moving contacts 220 respectively corresponding to the multiple sets of stationary contact assemblies 400, multiple magnetic protection mechanisms 510 respectively corresponding to the first stationary contacts 410 of the multiple sets of stationary contact assemblies 400, and multiple thermal protection mechanisms respectively corresponding to the second stationary contacts 420 of the multiple sets of stationary contact assemblies 400. The multiple sets of stationary contact assemblies 400, multiple moving contacts 220, multiple magnetic protection mechanisms 510, and multiple thermal protection mechanisms are spaced apart along a third direction; a magnetic flux mechanism 530 is provided between two adjacent thermal protection mechanisms.

[0088] The first unfastening member 610 is a long rod structure arranged along the third direction in the length direction, and is located between the multiple magnetic protection mechanisms 510 and the contact support 210 in the first direction. The first unfastening member 610 is provided with multiple first driven parts 611 corresponding to the multiple magnetic protection mechanisms 510. Each magnetic protection mechanism 510 includes a magnetic yoke 511, an armature 512 and an armature spring (not shown in the figure) connected to the armature 512. The magnetic yoke 511 is preferably an inverted U-shaped structure. The armature 512 is rotatably arranged below the magnetic yoke 511. The first stationary contact 410 passes through the space enclosed by the magnetic yoke 511 and the armature 512 of the corresponding magnetic protection mechanism 510 and is connected to the top side of the magnetic yoke 511. The armature 512 of each magnetic protection mechanism 510 protrudes towards the first unfastening member 610 and is provided with a first driving part 5123 that drives and cooperates with the first driven part 611.

[0089] The second unlocking member 620 is a long rod structure arranged along a third direction in the length direction. The second unlocking member 620 is provided with a plurality of second driven parts 621 corresponding to a plurality of thermal protection mechanisms and a plurality of third driven parts 623 corresponding to a plurality of magnetic flux mechanisms 530. The third driven parts 623 are connected between two adjacent second driven parts 621. The push rod of the magnetic flux mechanism 530 drives and cooperates with the third driven parts 623 of the second unlocking member 620. The thermal protection mechanism is a bimetallic strip 520, which is located between the second unlocking member 620 and the second stationary contact 420 in the second direction. One end of each bimetallic strip 520 is connected to the corresponding second stationary contact 420, and the other end of each bimetallic strip 520 is a second driving part 521 that drives and cooperates with the second driven part 621. They are respectively inclined towards the direction of the second unlocking member 620. Furthermore, each of the second driven parts 621 of the second unfastening member 620 is provided with an adjusting screw 622 for adjusting the distance between it and the corresponding second driving part 521, so as to realize the adjustable thermal protection function.

[0090] like Figures 1-3As shown, the housing 100 includes an upper base 110 and a lower base 120 that are connected and overlapped. The upper base 110 is located above the lower base 120 in a second direction. The moving contact assembly 200, the stationary contact assembly 400, the magnetic protection mechanism 510, the thermal protection mechanism, the magnetic flux mechanism 530, and the snap-fit ​​mechanism 600, which are connected to the moving iron core 310, are respectively mounted on the upper base 110 to form an upper base module. The return spring 800, the coil assembly 700, and the control assembly 900 are respectively installed in the lower base 120 to form a lower base module. The two-layer mounting structure formed by the upper base 110 and the lower base 120 of the housing 100 facilitates the effective assembly of various mechanisms or components and is conducive to realizing automated assembly.

[0091] Specifically, such as Figures 13-15 As shown, the upper base 110 has a first mounting groove 111 corresponding to the first stationary contact 410 and a second mounting groove 112 corresponding to the second stationary contact 420 on its top outer side. The upper base 110 has a first receiving groove 116 corresponding to the armature 512 of the magnetic protection mechanism 510 and a second receiving groove 117 corresponding to the thermal protection mechanism on its top inner side. The upper base 110 has a first connecting hole 118 connecting the first mounting groove 111 and the first receiving groove 116 and corresponding to the two sides of the magnetic yoke 511 of the magnetic protection mechanism 510, a second connecting hole 119 connecting the second mounting groove 112 and the second receiving groove 117 and corresponding to the thermal protection mechanism, a third mounting groove communicating with the interior of the upper base 110 and corresponding to the contact support 210, a fourth mounting groove 114 corresponding to the snap-fit ​​assembly 630 of the snap-fit ​​mechanism 600, and a fifth mounting groove 115 located between two adjacent second receiving grooves 117 and corresponding to the magnetic flux mechanism 530.

[0092] like Figures 9-10As shown in Figures 13-15, the first stationary contact 410 is fixed in the first mounting groove 111 of the upper base 110. The top side of the magnetic yoke 511 of the magnetic protection mechanism 510 is fixed on the top side of the first stationary contact 410 and located in the first mounting groove 111. The two sides of the magnetic yoke 511 pass through the first connecting hole 118 and extend into the first receiving groove 116. The armature 512 of the magnetic protection mechanism 510 is rotatably disposed in one end of the first receiving groove 116 of the upper base 110. The first unlocking member 610 of the latching mechanism 600 is transversely disposed in the other end of all the first receiving grooves 116. The first receiving groove 116 has armature shaft holes 1161 on both sides of the third direction. The armature 512 has protruding armature shafts 5121 on both sides of the third direction that are rotatably connected to the rotatable connecting holes of the armature 512. Furthermore, a cover plate 130 is provided inside the upper base 110. The cover plate 130 is connected to the bottom side of all the first receiving slots 116 of the upper base 110 and is transversely arranged across the bottom side of the end of all the first receiving slots 116 where the armature 512 is located. The armature spring of the magnetic protection mechanism 510 is connected between the armature 512 and the cover plate 130. The armature 512 is provided with a first armature spring hook 5122, and the cover plate 130 is provided with a second armature spring hook 131. The two ends of the armature spring are respectively hung on the first armature spring hook 5122 and the second armature spring hook 131. The first stationary contact 410 and the upper base 110, the first stationary contact 410 and the magnetic yoke 511, and the cover plate 130 and the upper base 110 can be fixedly connected by means of screws, riveting, snap-fitting, etc.

[0093] like Figures 11-13 As shown in Figure 15, the second stationary contact 420 is fixed in the second mounting groove 112 of the upper base 110. One end of the bimetallic strip 520, which serves as a thermal protection mechanism, is fixed to the bottom side of the second stationary contact 420 and located in the second mounting groove 112. The other end of the bimetallic strip 520, which has a second driving part 521, extends through the second connecting hole 119 and into the second receiving groove 117. The second unlocking member 620 of the latching mechanism 600 is arranged across all the second receiving grooves 117 of the upper base 110. The magnetic flux mechanism 530 is fixed in the fifth mounting groove 115 of the upper base 110. Furthermore, the upper base 110 is provided with a magnetic flux cover 150 corresponding to the fifth mounting groove 115. The magnetic flux cover 150 is connected to the bottom side of the fifth mounting groove 115 of the upper base 110 to limit and fix the magnetic flux mechanism 530 in the fifth mounting groove 115. The second stationary contact 420 and the upper base 110, the second stationary contact 420 and the bimetallic strip 520, and the magnetic flux shield 150 and the upper base 110 can be fixedly connected by screws, rivets, snap-fits, etc.

[0094] like Figure 6 , 15As shown in Figure -16, the fourth mounting groove 114 of the upper base 110 penetrates the top of the upper base 110 and communicates with the interior of the upper base 110. A cover 140 corresponding to the fourth mounting groove 114 is provided inside the upper base 110, and the cover 140 is fitted and connected to the bottom side of the fourth mounting groove 114 of the upper base 110. The snap-fit ​​body of the snap-fit ​​component 630 is rotatably inserted into the fourth mounting groove 114. The fourth mounting groove 114 has snap-fit ​​shaft holes 1141 on its two side walls in the third direction, which are rotatably connected to the snap-fit ​​shaft 6306. The elastic limiting part 6307 of the snap-fit ​​component extends out of the fourth mounting groove 114 and into the cover 140. The common elastic element 6330 of the snap-fit ​​component 630 is inserted into the cover 140. The cover 140 and the upper base 110 can be fixedly connected by screws, riveting, snap-fitting, etc.

[0095] like Figure 8 , 17 As shown in Figure -18, the contact support 210 includes multiple support portions 211 corresponding to multiple moving contacts 220. Each moving contact 220 is mounted on the top side of a support portion 211 of the contact support 210. Each support portion 211 of the contact support 210 has at least one positioning groove 212 on its bottom side. A connecting rib 213 is provided between two adjacent support portions 211. Mounting blocks 214 are provided on the outer top of two support portions 211 on the third-direction upward sides. The mounting block 214 has clearance grooves 215 on both sides in the first direction, which are used to avoid the first fastener 6310 and the second fastener 6320 of the latching mechanism 600 having a fastening part 6301 at one end. Each clearance groove 215 has mounting holes 216 on both sides of the third direction. The limiting member 230 is installed in the clearance groove 215, and its two ends are inserted into the mounting holes 216 respectively. The rolling bearing 240 is installed in the clearance groove 215 and sleeved on the limiting member 230.

[0096] like Figure 8 , 17 As shown, the third mounting groove of the upper base 110 is provided with a partition plate 1131 corresponding to the connecting rib 213 of the contact support 210, which is used to divide the third mounting groove into multiple partition chambers 113. The partition plate 1131 is provided with a guide groove 1132. Each support part 211 of the contact support 210 is placed in the partition chamber 113, and each connecting rib 213 of the contact support 210 is slidably disposed in the guide groove 1132.

[0097] like Figure 17As shown, the moving iron core 310 includes a moving iron core body and a moving iron core rod 313. The moving iron core body has an E-shaped structure and is formed by a moving iron core transverse portion 311 and three moving iron core longitudinal portions 312 arranged along the length direction of the moving iron core transverse portion 311. The length direction of the moving iron core transverse portion 311 is arranged along a first direction and the width direction is arranged along a third direction. The moving iron core rod 313 is arranged through the moving iron core transverse portion 311 along the third direction, and the two ends of the moving iron core rod 313 protrude from both sides of the width direction of the moving iron core transverse portion 311.

[0098] like Figure 17 , 19 As shown, the low-power contactor in this embodiment also includes a moving iron core shell. The moving iron core 310 is at least partially installed in the moving iron core shell to form a moving iron core assembly 300. The moving iron core assembly 300 is installed in the upper base 110 and the moving iron core shell is connected to the bottom side of the contact support 210. Specifically, the moving iron core shell includes a moving iron core seat 320 and a moving iron core cover 330. The moving iron core cover 330 is fitted onto the top side of the moving iron core seat 320. The moving iron core cover 330 and the moving iron core seat 320 are respectively connected to the bottom side of the contact support 210. The moving iron core cover 330 and the moving iron core seat 320, the moving iron core cover 330 and the contact support 210, and the moving iron core seat 320 and the contact support 210 can be connected by screws, riveting, snap-fitting, etc. The top side of the moving iron core seat 320 is provided with a first positioning boss 321, and the top side of the moving iron core cover 330 is provided with a second positioning boss 331. The first positioning boss 321 and the second positioning boss 331 are respectively inserted into the positioning groove 212. The bottom side of the moving iron core holder 320 is provided with three protruding holes 322, each corresponding to one of the three longitudinal portions 312 of the moving iron core. A support portion 323 is formed between two adjacent protruding holes 322. The transverse portion 311 of the moving iron core is inserted into the moving iron core holder 320 and placed on the support portion 323. The three longitudinal portions 312 of the moving iron core extend out of the moving iron core holder 320 from the three protruding holes 322. The bottom side of the moving iron core holder 320 is provided with a first spring limiting portion 324, which is preferably a protruding structure.

[0099] like Figures 19-21As shown, a second spring limiting part 122 is provided inside the lower base 120. A return spring 800 is installed inside the lower base 120, with one end connected to the first spring limiting part 324 on the bottom side of the moving iron core seat 320 and the other end connected to the second spring limiting part 122 of the lower base 120. The circuit board of the control component 900 and the control switch 910 are respectively mounted on the coil frame 720 of the coil assembly 700. The circuit board of the control component 900 and the control switch 910 are arranged in parallel and spaced apart, parallel to the second direction. The control switch 910 is located between the circuit board and the stationary iron core 730 of the coil assembly 700 in the first direction. The control component 900 and the coil assembly 700 are installed together inside the lower base 120. The circuit board and the coil frame 720, and the control switch 910 and the coil frame 720 can be connected by screws, riveting, snap-fitting, etc.

[0100] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used during use. They are only for ease of description and do not indicate that the device or component referred to must have a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating relative importance.

[0101] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the protection scope of the present invention.

Claims

1. A low-power contactor, comprising a housing (100), a moving contact assembly (200), a moving iron core (310), a return spring (800), a coil assembly (700), and at least one set of stationary contact assemblies (400) respectively disposed within the housing (100), wherein the moving contact assembly (200) includes a contact support (210) and a moving contact (220) disposed on the contact support (210), and the stationary contact assembly (400) includes at least a first stationary contact (410) and a second stationary contact (420) respectively corresponding to the two ends of the moving contact (220). The moving iron core (310) is connected to the moving contact assembly (200). When the coil assembly (700) is energized, it drives the moving iron core (310), causing the moving iron core (310) to move the moving contact (220) from the open position to the closed position, connecting the first stationary contact (410) and the second stationary contact (420). When the coil assembly (700) is de-energized, the reset spring (800) can drive the moving contact (220) from the closed position to the open position, disconnecting the first stationary contact (410) and the second stationary contact (420). The characteristic feature is that: The low-power contactor also includes a trigger mechanism and a latching mechanism (600) respectively disposed in the housing (100). The latching mechanism (600) includes at least one release structure and at least one set of latching components (630). The moving contact component (200) includes a limiting structure disposed on the contact support (210). The latching component (630) cooperates with the limiting structure to limit the moving contact (220) to the closed position and prevent it from moving to the open position. When the trigger mechanism acts on the release structure, it drives the release structure to drive the latching component (630) to release the limiting structure, thereby releasing the limiting of the moving contact (220).

2. The low-power contactor according to claim 1, characterized in that: Each set of latching components (630) includes at least one latching element and an elastic structure corresponding to the latching element. The release structure is connected to the latching element. The limiting structure includes a limiting element (230) corresponding to the latching element. The latching component (630) limits the moving contact (220) to the closed position and prevents it from moving to the open position by limiting the latching element and the corresponding limiting element (230).

3. The low-power contactor according to claim 2, characterized in that: Each latching component is provided with a latching part (6301). When the moving contact (220) moves from the open position to the closed position, the latching part (6301) is first driven by the limiting component (230) to overcome the force of the elastic structure. Then, when the moving contact (220) continues to move to the closed position, the elastic structure drives the latching component to engage with the latching part (6301) and the limiting component (230) to limit the moving contact (220) to the closed position. When the triggering mechanism acts on the release structure, the release structure drives the latching component to overcome the force of the elastic structure. The latching component separates from the limiting component (230) through the latching part (6301) to release the limit on the moving contact (220). The moving contact (220) moves to the open position under the force of the return spring (800). Then, the latching component is reset under the force of the elastic structure.

4. The low-power contactor according to claim 3, characterized in that: The latching part (6301) includes an action surface (6302) and a limiting surface (6303). When the moving contact (220) moves from the open position to the closed position, the action surface (6302) is located on the movement trajectory of the limiting member (230). When the moving contact (220) moves from the closed position to the open position, the limiting surface (6303) is located on the movement trajectory of the limiting member (230).

5. The low-power contactor according to claim 4, characterized in that: The contact support (210) is linearly movable, the limiting member (230) is a round shaft structure that is linearly movable synchronously with the contact support (210), the latching part (6301) is a triangular protrusion structure that is protruded on the side of the latching member, the hypotenuse of the latching part (6301) serves as the working surface (6302) and is inclined to the moving direction of the limiting member (230), and the straight side of the latching part (6301) serves as the limiting surface (6303) and is perpendicular to the moving direction of the limiting member (230).

6. The low-power contactor according to claim 2, characterized in that: The latching component is rotatably configured with its rotation center at O1. When the moving contact (220) is in the closed position, the frictional force applied to the latching component by the limiting component (230) is F1, with a lever arm of L1. The force applied to the latching component by the reset spring (800) is F2, with a lever arm of L2. The force applied to the latching component by the elastic structure is F3, with a lever arm of L3. The force applied to the latching component by the triggering mechanism through the unlocking structure is F4, with a lever arm of L4. Forces F2 and F3 each have a component force in the direction of force F1, and force F4 has a component force in the opposite direction of force F1. F4L4 > F1L1 + F2L2 + F3L3.

7. The low-power contactor according to claim 6, characterized in that: When the moving contact (220) is in the closed position, the action point O2 of the latching member and the limiting member (230) is located on one side of the line connecting the connection between the latching member and the unlatching structure and the rotation center O1 of the latching member, and the action point of the latching member and the elastic structure is located on the other side of the line connecting the connection between the latching member and the unlatching structure and the rotation center O1 of the latching member.

8. The low-power contactor according to claim 6, characterized in that: The rotation center direction, force F1 direction, and force F2 direction of the latching member are perpendicular to each other. When the moving contact (220) is in the closed position, the action point O2 of the latching member and the limiting member (230) is located between the connection between the latching member and the unlatching structure and the rotation center O1 of the latching member in the force F1 direction. Moreover, the action point O2 of the latching member and the limiting member (230) is far away from the connection between the latching member and the unlatching structure and close to the rotation center O1 of the latching member in the force F1 direction.

9. The low-power contactor according to claim 2, characterized in that: The limiting member (230) acts on the snap fastener through a rolling bearing (240), which is sleeved on the outside of the limiting member (230).

10. The low-power contactor according to claim 2, characterized in that: It includes at least two triggering mechanisms, namely a magnetic protection mechanism (510) and a thermal protection mechanism. The latching mechanism (600) includes two unlocking structures, namely a first unlocking component (610) and a second unlocking component (620) corresponding to the magnetic protection mechanism (510) and the thermal protection mechanism, respectively. Each set of buckle components (630) includes two buckle members and two elastic structures corresponding to the two buckle members. The two buckle members are a first buckle member (6310) and a second buckle member (6320) that are connected to the first unbuckle member (610) and the second unbuckle member (620) and move synchronously. The first buckle member (6310) and the second buckle member (6320) of the same set of buckle components (630) rotate synchronously. When the magnetic protection mechanism (510) acts on the first unlocking member (610), it drives the first unlocking member (610) to release the first locking member (6310) from the limit of the corresponding limiting member (230). At the same time, the first unlocking member (610) also drives the second locking member (6320) to release the limit of the corresponding limiting member (230) through the first locking member (6310). When the thermal protection mechanism acts on the second unlocking member (620), it drives the second unlocking member (620) to release the second locking member (6320) from the limit of the corresponding limiting member (230). At the same time, the second unlocking member (620) also drives the first locking member (6310) to release the limit of the corresponding limiting member (230) through the second locking member (6320).

11. The low-power contactor according to claim 10, characterized in that: The two elastic structures of the same group of buckle assembly (630) are the same elastic structure, which is a common elastic element (6330). The two ends of the common elastic element (6330) are respectively connected to the first buckle element (6310) and the second buckle element (6320) of the same group of buckle assembly (630).

12. The low-power contactor according to claim 10, characterized in that: It also includes a magnetic flux mechanism (530) as another triggering mechanism and corresponding to the second unlocking member (620). When the magnetic flux mechanism (530) acts on the second unlocking member (620), it drives the second unlocking member (620) to drive the second latching member (6320) to release the limit on the corresponding limiting member (230). At the same time, the second unlocking member (620) also drives the first latching member (6310) to release the limit on the corresponding limiting member (230) through the second latching member (6320).

13. The low-power contactor according to claim 10, characterized in that: The rotation centers of the first snap fastener (6310) and the second snap fastener (6320) of the same snap fastener assembly (630) are arranged parallel to each other, and the first snap fastener (6310) and the second snap fastener (6320) of the same snap fastener assembly (630) are engaged with each other.

14. The low-power contactor according to claim 10, characterized in that: The first stationary contact (410) and the second stationary contact (420) of the same group of stationary contact assemblies (400) are located on both sides of the contact support (210) in the first direction and below the corresponding moving contact (220) in the second direction. The first unlocking member (610) of the latching mechanism (600) is located below the first stationary contact (410) in the second direction, the second unlocking member (620) of the latching mechanism (600) is located below the second stationary contact (420) in the second direction, and the first unlocking member (610) and the second unlocking member (620) are located on both sides of the contact support (210) in the first direction, and the latching assembly (630) of the latching mechanism (600) is located on the side of the contact support (210) in the third direction; The moving iron core (310) is located below the contact support (210) and above the coil assembly (700) in the second direction; The first direction, the second direction, and the third direction are perpendicular to each other.

15. The low-power contactor according to claim 14, characterized in that: The contactor is a multiphase contactor, comprising multiple sets of stationary contact assemblies (400) respectively connected to multiple phases, multiple moving contacts (220) respectively corresponding to the multiple sets of stationary contact assemblies (400), multiple magnetic protection mechanisms (510) respectively corresponding to the first stationary contact (410) of the multiple sets of stationary contact assemblies (400), and multiple thermal protection mechanisms respectively corresponding to the second stationary contact (420) of the multiple sets of stationary contact assemblies (400). The multiple sets of stationary contact assemblies (400), multiple moving contacts (220), multiple magnetic protection mechanisms (510), and multiple thermal protection mechanisms are respectively spaced apart along a third direction. The first unfastening member (610) is a long rod structure arranged along the third direction in the length direction, and is located between the multiple magnetic protection mechanisms (510) and the contact support (210) in the first direction. The first unfastening member (610) is provided with multiple first driven parts (611) corresponding to the multiple magnetic protection mechanisms (510). Each magnetic protection mechanism (510) includes a magnetic yoke (511), an armature (512) and an armature spring connected to the armature (512). The armature (512) is rotatably arranged below the magnetic yoke (511). The first stationary contact (410) passes through the space enclosed by the magnetic yoke (511) and the armature (512) of the corresponding magnetic protection mechanism (510) and is connected to the magnetic yoke (511). The armature (512) of each magnetic protection mechanism (510) protrudes towards the first unfastening member (610) and is provided with a first driving part (5123) that drives and cooperates with the first driven part (611). And / or, the second unlocking member (620) is a long rod structure arranged along a third direction in the length direction. The second unlocking member (620) is provided with a plurality of second driven parts (621) corresponding to a plurality of thermal protection mechanisms. The thermal protection mechanism is a bimetallic strip (520) and is located between the second unlocking member (620) and the second stationary contact (420) in the second direction. One end of each bimetallic strip (520) is connected to the corresponding second stationary contact (420), and the other end of each bimetallic strip (520) is a second driving part (521) that drives and cooperates with the second driven part (621), and is inclined towards the direction of the second unlocking member (620).

16. The low-power contactor according to claim 14, characterized in that: The outer casing (100) includes an upper base (110) and a lower base (120) that are connected to each other. The upper base (110) is located above the lower base (120) in a second direction. The moving contact assembly (200), the stationary contact assembly (400), the magnetic protection mechanism (510), the thermal protection mechanism, and the snap-fit ​​mechanism (600) connected to the moving iron core (310) are respectively mounted on the upper base (110) to form an upper base module. The reset spring (800) and the coil assembly (700) are respectively installed in the lower base (120) to form a lower base module.

17. The low-power contactor according to claim 1, characterized in that: It also includes a control component (900), which includes a control switch (910). When the moving contact (220) is in the closed position, the control switch (910) is triggered, causing the control component (900) to de-energize the control coil assembly (700).

18. The low-power contactor according to claim 1, characterized in that: The low-power contactor includes a protection mechanism that acts as a triggering mechanism. When the contactor fails, it acts on the release structure to drive the release structure to release the latching assembly (630) from the limit structure. And / or, the low-power contactor includes a triggering mechanism for acting on the release structure according to the received tripping signal, driving the release structure to release the latching assembly (630) from the limit structure.

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