Low-power contactor

Abstract

The utility model relates to a low-power contactor, and relates to the technical field of contactors, the low-power contactor comprises a shell, a contact module, a control module, a pushing assembly and a circuit board, the contact module is fixed with the shell, the contact module comprises a connecting piece and a conduction assembly, and one end of the connecting piece extends out to be electrically connected with an external device; the control module is arranged in the shell and located on the upper side of the contact module, and the control module can control the conduction assembly and the connecting piece to be conducted or separated; the pushing assembly is arranged in the shell and located on the upper side of the contact module, and the pushing assembly can assist the control module to enable the conduction assembly to move and be conducted with the connecting piece; and the circuit board is arranged in the shell and is electrically connected with the control module. The contactor is used for solving the problem that the voltage and power of an existing contactor are large when the contactor is switched on.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of contactors, in particular to a low-power contactor. BACKGROUND

[0002] With the rapid development of the electric vehicle market, the demand for charging infrastructure is increasing. As an important electrical device, contactors are mainly used to control the on-off of the circuit, which can ensure the safety and stability of the charging process.

[0003] The current contactor usually includes a coil, a first magnetic guide and a rotating part, etc. A permanent magnet inside the rotating part is connected with the first magnetic guide. When the contactor is in a separated state, it is not powered. At this time, the second magnetic guide provided on the coil is equivalent to iron. The attractive force of the permanent magnet transmitted to the first magnetic guide can attract the second magnetic guide. When the contactor needs to be turned on, the provided turn-on voltage needs to be large enough to make the instantaneous repulsive force of the second magnetic guide to the first magnetic guide greater than the attractive force of the permanent magnet to the second magnetic guide, so that the rotating part rotates to realize the turn-on of the internal contactor. However, the contactor is difficult to meet the needs of low power and low voltage, and is not energy-saving. CONTENT OF THE INVENTION

[0004] The application provides a low-power contactor to solve the problem of large voltage and power of the current contactor when turned on.

[0005] A low-power contactor, comprising:

[0006] a shell, which is hollow inside;

[0007] a contact module, which is fixed to the shell and comprises a connecting piece and a turn-on assembly, one end of the connecting piece extending out to be electrically connected with an external device;

[0008] a control module, which is arranged inside the shell and located above the contact module, and can control the turn-on assembly and the connecting piece to be turned on or separated;

[0009] a pushing assembly, which is arranged inside the shell and located above the contact module, and can help the control module to move the turn-on assembly and make it turned on with the connecting piece;

[0010] a circuit board, which is arranged inside the shell and electrically connected with the control module.

[0011] By adopting the technical scheme, the shell provides an internal space to accommodate other components, the circuit board is electrically connected with the control module, the control module is powered to control the moving of the conducting assembly, and then the conducting assembly and the connecting piece are turned on and off, and the pushing assembly can help the control module to move the conducting assembly and turn on the connecting piece, thereby reducing the on-voltage and on-power required during on, and meeting different needs of customers.

[0012] In one of the embodiments, the pushing assembly comprises an inner shell and a first elastic member, the inner shell is fixed with the contact module, a receiving groove is arranged at the bottom of the inner shell, the first elastic member is arranged in the receiving groove and one end of the first elastic member is connected with the inner shell, and the conducting assembly can extend into the receiving groove and abut against the first elastic member.

[0013] By adopting the technical scheme, the inner shell is fixed with the contact module, and the receiving groove and the first elastic member are arranged to provide elastic support for the movement of the conducting assembly. When the control module needs to control the movement of the conducting assembly to turn on the connecting piece, the first elastic member can release energy to the conducting assembly, thereby helping the conducting assembly to move, ensuring that the conducting assembly stably contacts the connecting piece, and enabling the control module to control the movement of the conducting assembly with smaller voltage and power.

[0014] In one of the embodiments, the receiving groove is provided with a stop block, two stop blocks are arranged in opposite positions, and the other end of the first elastic member abuts against the stop block.

[0015] By adopting the technical scheme, two opposite stop blocks are arranged in the receiving groove to fix the other end of the first elastic member. The presence of the stop block can limit the deformation of the first elastic member during work, so that the first elastic member can only help the conducting assembly to move for a part of the distance during the movement of the conducting assembly.

[0016] In one of the embodiments, the conducting assembly comprises a movable contact link, a conducting piece and a pushing piece, the movable contact link is arranged at the lower side of the control module and is connected with the control module, the conducting piece is provided with a plurality of conducting pieces and is fixed on the movable contact link, and the pushing piece is arranged at the upper end of the movable contact link and is located in the receiving groove.

[0017] By adopting the technical scheme, the control module can control the movable contact link to drive the conducting piece and the pushing piece to move, and the first elastic member and the pushing piece jointly realize the on of the conducting piece and the connecting piece through the reaction force of the first elastic member on the pushing piece.

[0018] In one of the embodiments, the pushing piece comprises an abutting plate, the abutting plate extends towards the first elastic member and can abut against the first elastic member.

[0019] By adopting the technical scheme, the abutment plate can better extend into the blocking blocks and compress the first elastic member when the conducting member moves and the connecting member separates, and then when the conducting member is ready to conduct with the connecting member, the abutment plate can be pushed by the first elastic member to assist the movement of the conducting member and the conduction with the connecting member in the initial stage.

[0020] In one of the embodiments, the contact module further comprises a base, the base is hollow inside and fixed with the inner shell, the shell cover is arranged on the base and the inner shell, the moving contact link and the connecting member are arranged on the base, the connecting member is arranged in multiple and spaced apart on opposite ends of the moving contact link, one end of the connecting member penetrates the base downward, and each conducting member extends along the opposite ends of the moving contact link.

[0021] By adopting the technical scheme, the structure design enables the conducting member to conduct with the connecting members located on both sides, and then enables the conduction between the external devices connected with the connecting members, which is beneficial to the conduction of current, enables the contactor to easily realize the on-off of the circuit, and improves the applicability of the small-power contactor.

[0022] In one of the embodiments, the circuit board is arranged on the base and extends upward, the circuit board is penetrated by a clearance hole, and the accommodating groove is arranged in the clearance hole.

[0023] By adopting the technical scheme, the layout design makes the space utilization between the circuit board and other components such as the pushing assembly more reasonable, avoids the interference between the components, and facilitates the connection and control of the circuit, and improves the overall compactness and reliability of the small-power contactor.

[0024] In one of the embodiments, the control module comprises a coil, a rotating member and a first magnetic guide member, the inner shell surrounds the coil, the rotating member and the first magnetic guide member, the coil is electrically connected with the circuit board, the rotating member is arranged on the lower side of the coil, the first magnetic guide member is arranged in multiple and located on opposite ends of the rotating member, and the lower end of the rotating member is movably connected with the moving contact link.

[0025] By adopting the technical scheme, the coil is applied with conduction voltage and separation voltage by the circuit board to generate a magnetic field, and repel different first magnetic guide members respectively, and then when conduction is needed, the reaction force of the first elastic member can assist the rotation of the rotating member, and then drive the moving contact link to move to realize the conduction of the conducting member and the connecting member. This design enables the control module to accurately control the action of the conducting assembly, and improves the control precision and response speed of the small-power contactor.

[0026] In one of the embodiments, the coil further comprises a second magnetic conductor, the second magnetic conductor is arranged at opposite ends of the coil, the rotating member is arranged between the second magnetic conductors, and the first magnetic conductor can abut and attract the corresponding second magnetic conductor.

[0027] By adopting the above technical solution, the second magnetic conductor facilitates generation of different magnetic fields when the coil is powered on and covers the first magnetic conductor and the rotating member, so as to make the first magnetic conductor and the second magnetic conductor repel each other and drive the rotating member to rotate; in addition, the coil is instantaneously turned off after being powered on, at this time, the second magnetic conductor no longer has a magnetic field and is equivalent to iron, so that the first magnetic conductor generates an attractive force and is attracted to the second magnetic conductor, so that the low-power contactor remains in a conducting or separating state.

[0028] In one of the embodiments, the movable contact link further comprises a second elastic member, the second elastic member corresponds to the conducting member one by one and is fixed, and the second elastic member is arranged at one end of the conducting member close to the first elastic member.

[0029] By adopting the above technical solution, the second elastic member is in a compressed state when the conducting member and the connecting member are conducting, and can provide assistance in the initial stage of separation of the conducting member and the connecting member, so that the required separation voltage of the coil is smaller, thereby meeting the needs of customers for low-power contactors.

[0030] In summary, the present application at least includes the following beneficial effects:

[0031] 1. The shell provides an internal space to accommodate other components, and the circuit board is electrically connected with the control module, and the control module is powered on to control the movement of the conducting assembly, thereby realizing the on-off of the conducting assembly and the connecting member, and the pushing assembly can assist the control module to move the conducting assembly and conduct with the connecting member, thereby reducing the required conducting voltage and conducting power when conducting, thereby meeting the different needs of customers

[0032] 2. This layout design makes the space utilization between the circuit board and other components such as the pushing assembly more reasonable, avoids interference between components, and facilitates connection and control of the circuit, thereby improving the overall compactness and reliability of the low-power contactor.

[0033] 3. The second magnetic conductor facilitates generation of different magnetic fields when the coil is powered on and covers the first magnetic conductor and the rotating member, so as to make the first magnetic conductor and the second magnetic conductor repel each other and drive the rotating member to rotate; in addition, the coil is instantaneously turned off after being powered on, at this time, the second magnetic conductor no longer has a magnetic field and is equivalent to iron, so that the first magnetic conductor generates an attractive force and is attracted to the second magnetic conductor, so that the low-power contactor remains in a conducting or separating state. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1is a whole structure schematic diagram of a small power contactor provided by an embodiment of the present application;

[0035] Figure 2 is a structure schematic diagram of a contact module provided by an embodiment of the present application;

[0036] Figure 3 is a structure schematic diagram of a control module provided by an embodiment of the present application;

[0037] Figure 4 is a structure schematic diagram of a pushing assembly provided by an embodiment of the present application;

[0038] Figure 5 is a structure schematic diagram of a separation of a conducting member and a connecting member provided by an embodiment of the present application.

[0039] Legend: 1, small power contactor; 11, shell; 12, contact module; 121, connecting member; 122, conducting assembly; 1221, movable contact link; 1222, conducting member; 1223, pushing member; 1224, abutting plate; 1225, second elastic member; 123, base; 13, control module; 131, coil; 132, rotating member; 133, first magnetic conducting member; 134, second magnetic conducting member; 14, pushing assembly; 141, inner shell; 1411, accommodating groove; 1412, stop block; 142, first elastic member; 15, circuit board; 151, accommodation hole. DETAILED DESCRIPTION

[0040] The following will be described in detail in combination with the accompanying Figures 1-5 The small power contactor provided by the present application will be described in further detail.

[0041] Embodiment 1

[0042] Please refer to Figures 1-5 The small power contactor 1 provided by the embodiment of the present application includes a shell 11, a contact module 12, a control module 13, a pushing assembly 14 and a circuit board 15.

[0043] As Figure 1 shown, the shell 11 is hollow inside, for accommodating other components. Specifically, the shell 11 can be made of metal or plastic material, having good corrosion resistance and mechanical strength. The design of the shell 11 needs to ensure the sealing and stability between the components, preventing dust and moisture from entering and affecting the normal work of the small power contactor 1.

[0044] As Figure 2As shown, the contact module 12 is fixed with the shell 11, and the contact module 12 includes the connecting pieces 121 and the conducting assembly 122. The connecting pieces 121 extend outward at one end to be electrically connected with external devices. Specifically, the contact module 12 further includes the base 123, which is hollow inside and surrounded by the shell 11. The conducting assembly 122 is arranged in the base 123 and extends along the length direction of the base 123. The connecting pieces 121 are arranged in the base 123 and are multiple in number. The multiple connecting pieces 121 are arranged side by side at both ends of the conducting assembly 122 and are arranged in intervals along the length direction. One end of each connecting piece 121 penetrates the base 123 downward and can be connected with external electrical devices, and the other end can be connected with the conducting assembly 122. The base 123 serves to support each part of the contact module 12, ensuring its stability and reliability. The material of the base 123 can be selected from ceramic or high-strength plastic with good insulation performance to prevent the occurrence of electric leakage and short circuit. The connecting pieces 121 are usually made of copper alloy material, which has excellent electrical conductivity and corrosion resistance. The shape of the connecting pieces 121 can be designed into a circle, a square or other suitable shapes according to actual needs to adapt to different installation environments.

[0045] As Figure 3As shown, the control module 13 is arranged inside the shell 11 and on the upper side of the contact module 12, and can control the conduction assembly 122 to conduct or separate from the connecting piece 121; the circuit board 15 is arranged inside the shell 11 and electrically connected with the control module 13. Specifically, the control module 13 can include a coil 131, a rotating piece 132 and a first magnetic conducting piece 133, the coil 131 is electrically connected with the circuit board 15, the rotating piece 132 is arranged on the lower side of the coil 131 and the lower end is connected with the conduction assembly 122, the first magnetic conducting piece 133 is arranged on the opposite ends of the rotating piece 132, and the coil 131 further includes a second magnetic conducting piece 134, which is arranged on the two ends of the coil 131 and extends downward to the two ends of the rotating piece 132. The number of turns and the diameter of the coil 131 should be considered to obtain a suitable magnetic field strength. The overall structure of the control module 13 is compact, occupies small space, and is conducive to reducing the volume and weight of the low-power contactor 1. The rotating piece 132 further comprises a permanent magnet, which is connected with the first magnetic conducting piece 133. In this embodiment, the first magnetic conducting piece 133 is an armature, the rotating piece 132 is provided with two armatures on the opposite ends, the second magnetic conducting piece 134 is a magnetic yoke, both magnetic yokes extend towards the rotating piece 132 and are located between the two armatures on one end of the rotating piece 132, and the magnetic poles of the two armatures are opposite, the magnetic poles of the two horizontally opposite armatures on the rotating piece 132 are the same, and the permanent magnet is used to provide magnetic force to the armature. The circuit board 15 supplies power to the coil 131, so that the magnetic poles of the magnetic yoke can change according to the direction of the current, thereby generating a magnetic field that completely covers the rotating piece 132 and the armature, so that the armature can be repelled by the magnetic yoke, thereby making the rotating piece 132 rotate clockwise or counterclockwise, driving the conduction assembly 122 to move horizontally and conduct or separate from the connecting piece 121.

[0046] As shown in Figure 4 The pushing assembly 14 is arranged in the shell 11 and on the upper side of the contact module 12, and can assist the control module 13 to move the conduction assembly 122 and conduct with the connecting piece 121. The pushing assembly 14 can include an inner shell 141 and a first elastic member 142, the inner shell 141 is fixed with the base 123 and the bottom is provided with an accommodation groove 1411, the first elastic member 142 is arranged in the accommodation groove 1411 and one end is connected with the side wall of the inner shell 141, and the conduction assembly 122 can extend into the accommodation groove 1411 and abut against the first elastic member 142. The circuit board 15 is arranged on the base 123 and extends upward, the circuit board 15 is provided with a clearance hole 151, the accommodation groove 1411 is arranged in the clearance hole 151, and the surface of the circuit board 15 can be coated with a layer of moisture-proof and corrosion-resistant coating to increase the service life.

[0047] The accommodating groove 1411 is further provided with a stopper 1412, the stopper 1412 is provided with two stoppers and is oppositely spaced, the other end of the first elastic member 142 can abut against the stopper 1412, and the abutting plate 1224 can pass between the two stoppers 1412 and abut against the first elastic member 142. This design helps to maintain the stability and consistency of the first elastic member 142, avoids the first elastic member 142 from being deviated or deformed in a long time use; meanwhile, the first elastic member 142 only assists the pushing member 1223 in the initial stage. The material of the stopper 1412 can be selected as an engineering plastic or a metal material with moderate hardness, so as to ensure sufficient rigidity and support.

[0048] The on component 122 can include a movable contact link 1221, an on member 1222 and a pushing member 1223. The movable contact link 1221 is arranged on the lower side of the rotating member 132 and is connected with the rotating member 132, the on member 1222 is provided with a plurality of on members and is fixed to the movable contact link 1221, and the pushing member 1223 is arranged on the upper end of the movable contact link 1221 and is located in the accommodating groove 1411. The movable contact link 1221 can be made of an aluminum alloy or a stainless steel material, has high mechanical strength and durability. The material selection of the on member 1222 should consider the electrical conductivity and wear resistance, and commonly used materials include silver-nickel alloy, copper-tungsten alloy and the like. In the embodiment, the on member 1222 is arranged along the length direction of the movable contact link 1221, each on member 1222 extends along the width direction and can be aligned with the corresponding connecting member 121, each on member 1222 is arranged at the end of the corresponding connecting member 121 close to the first elastic member 142, and the two opposite connecting members 121 are connected with the on member 1222 to make the external devices electrically connected with the two connecting members 121 conductive with each other. The pushing member 1223 can include an abutting plate 1224, the abutting plate 1224 extends towards the first elastic member 142 and can move with the movable contact link 1221 to abut against the first elastic member 142.

[0049] The lower end of the movable contact link 1221 is further provided with a plurality of second elastic members 1225, the second elastic members 1225 correspond to the on members 1222 one by one and are arranged at the end of the on members 1222 close to the first elastic member 142. The first elastic member 142 and the second elastic member 1225 can be made of a spring steel wire or a rubber material, have good elasticity and durability. In the embodiment, the movement of the movable contact link 1221 includes a distance opening stage and an overtravel stage, the first elastic member 142 only stretches and contracts in the distance opening stage, and the second elastic member 1225 only stretches and contracts in the overtravel stage.

[0050] As Figure 3 and Figure 5As shown, during the process of connecting and disconnecting the conducting piece 1222 and the connecting piece 121, the circuit board 15 has a connecting voltage and a disconnecting voltage respectively, and both processes are completed by instant opening and closing. Normally, the connecting voltage is greater than the disconnecting voltage. Specifically, after the conducting piece 1222 and the connecting piece 121 are connected, the magnetic yoke is not electrified and is equivalent to iron. The magnetic force of the permanent magnet can be transmitted to the armatures on the left lower side and the right upper side of the rotating piece 132, and the armatures on the left and right sides are respectively attracted to the magnetic yokes. The second elastic piece 1225 is in a compressed state and abuts against the conducting piece 1222, so that the connection between the conducting piece 1222 and the connecting piece 121 is more stable. The attractive force of the armature to the magnetic yoke is offset by the reaction force generated by the compression of the second elastic piece 1225, and balance is achieved.

[0051] When the conducting piece 1222 and the connecting piece 121 are disconnected, the circuit board 15 provides a disconnecting voltage for the coil 131 and is instantaneously disconnected, so that the magnetic poles of the magnetic yokes appear instantaneously. The magnetic yoke on the left side of the rotating piece 132 generates a downward repulsive force on the armature on the left lower end, and the magnetic yoke on the right side of the rotating piece 132 generates an upward repulsive force on the armature on the right upper end. The instant repulsive force of the magnetic yoke to the armature is difficult to overcome the attractive force of the armature to the magnetic yoke originally transmitted by the permanent magnet. At this time, it is in the overtravel stage, and the reaction force of the second elastic piece 1225 is also applied to the movable contact link 1221, so that the reaction force and the repulsive force jointly overcome the attractive force. The rotating piece 132 rotates in the counterclockwise direction, and the movable contact link 1221 moves towards the first elastic piece 142. Then in the opening stage, the second elastic piece 1225 no longer stretches and exerts force. At this time, the magnetic yoke is equivalent to iron, and after the armature on the rotating piece 132 rotates to half, the attractive force of the armature on the rotating piece 132 to the corresponding magnetic yoke on the left upper end and the right lower end makes them respectively attract the corresponding magnetic yoke. At the same time, the abutment plate 1224 compresses the first elastic piece 142, and the reaction force of the first elastic piece 142 and the attractive force of the armature to the magnetic yoke reach balance.

[0052] When the control member 1222 and the connecting member 121 are turned on, the circuit board 15 provides the coil 131 with a turn-on voltage and is instantaneously disconnected, at which time the magnetic poles of the magnetic yokes instantaneously appear, the magnetic yokes on the left side of the rotating member 132 generate an upward repulsive force on the upper left end of the armature, and the magnetic yokes on the right side of the rotating member 132 generate a downward repulsive force on the lower right end of the armature, at which time the first elastic member 142 generates a leftward pushing force on the push plate, which overcomes the magnetic attraction force of the original permanent magnet on the armature, so that the rotating member 132 rotates clockwise, and then the magnetic force of the magnetic yokes disappears, which is equivalent to iron, at which time the rotating member 132 rotates to half, so that the permanent magnet transmits an attractive force to the lower left end and the upper right end of the armature and can be attracted and moved to the corresponding magnetic yoke, and then in the overtravel stage, the attractive force of the armature on the magnetic yoke overcomes the counterforce of the second elastic member 1225, the second elastic member 1225 is compressed and exerts a force on the control member 1222, so that the control member 1222 and the connecting member 121 are stably turned on, and finally the attractive force of the armature on the magnetic yoke and the counterforce of the second elastic member 1225 reach a balance.

[0053] In the entire process, the elastic force parameters and lengths of the first elastic member 142 and the second elastic member 1225, the setting position of the stop block 1412 in the accommodating groove 1411, the number of turns of the coil 131, the output power, and the turn-on voltage and other key performance parameters can be adjusted to meet the different needs of customers and pass the relevant experimental standards of the contactor.

[0054] The implementation principle of the embodiment is that by optimizing the structure design of the contact module 12, the control module 13, and the pushing assembly 14, the small-power contactor 1 is realized to instantaneously pass the counterforce of the first elastic member 142 to help the moving contact link 1221 to move when the turn-on voltage is turned on, so that the control member 1222 and the connecting member 121 can be turned on and compress the second elastic member 1225, and then the permanent magnet is maintained in the turned-on state; the counterforce of the second elastic member 1225 is used to help the moving contact link 1221 to move when the separation voltage is turned on, the first elastic member 142 is compressed, and the permanent magnet is also maintained in the separated state, so as to reduce the repulsive force of the magnetic yoke on the armature when turned on and separated, thereby being able to reduce the voltage and power, and in addition, the overall size is small, which is convenient for meeting the needs of customers.

[0055] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, so that: any equivalent changes made on the basis of the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A low power contactor characterized by, The utility model provides a connector, including: The shell (11) is hollow in the inside; The contact module (12) is fixed with the shell (11), and the contact module (12) includes connecting piece (121) and conducting assembly (122), and one end of connecting piece (121) protrudes and is electrically connected with external device; The control module (13) is located in the upper side of the contact module (12) in the inside of the shell (11), and the control module (13) can control conducting assembly (122) and connecting piece (121) conducting or separating; The push assembly (14) is located in the upper side of the contact module (12) in the shell (11), and the push assembly (14) can help the control module (13) to make conducting assembly (122) move and conduct with connecting piece (121); The circuit board (15) is located in the inside of the shell (11) and is electrically connected with the control module (13).

2. A low power contactor according to claim 1, characterized in that The push assembly (14) includes inner shell (141) and first elastic member (142), the inner shell (141) is fixed with the contact module (12), the bottom of the inner shell (141) is provided with accommodating groove (1411), the first elastic member (142) is located in the accommodating groove (1411) and one end is connected with the inner shell (141), and the conducting assembly (122) can extend into the accommodating groove (1411) and abut against the first elastic member (142).

3. A low power contactor according to claim 2, wherein The accommodating groove (1411) is provided with a stop block (1412), the stop block (1412) is provided with two and is oppositely spaced, and the other end of the first elastic member (142) abuts against the stop block (1412).

4. A low power contactor according to claim 3, wherein The conducting assembly (122) includes movable contact link (1221), conducting piece (1222) and pusher (1223), the movable contact link (1221) is located in the lower side of the control module (13) and is connected with the control module (13), the conducting piece (1222) is provided with a plurality of and is fixed on the movable contact link (1221), and the pusher (1223) is located in the upper end of the movable contact link (1221) and is located in the accommodating groove (1411).

5. A low power contactor according to claim 4, wherein The pusher (1223) includes an abutment plate (1224), which extends towards the first elastic member (142) and can abut against the first elastic member (142).

6. A low power contactor according to claim 4, wherein The contact module (12) further includes a base (123), which is hollow inside and fixed with the inner shell (141), and the shell (11) covers the base (123) and the inner shell (141), the movable contact link (1221) and the connecting piece (121) are arranged in the base (123), the connecting piece (121) is provided with a plurality of and is spaced apart from the opposite ends of the movable contact link (1221), one end of the connecting piece (121) penetrates the base (123) downward, and each conducting piece (1222) extends along the opposite ends of the movable contact link (1221).

7. A low power contactor according to claim 6, wherein The circuit board (15) is arranged on the base (123) and extends upward, the circuit board (15) is provided with a positioning hole (151), and the accommodating groove (1411) is arranged in the positioning hole (151).

8. A low power contactor according to claim 4, wherein The control module (13) comprises a coil (131), a rotating piece (132) and a first magnetic conducting piece (133), the inner shell (141) surrounds the coil (131), the rotating piece (132) and the first magnetic conducting piece (133), the coil (131) is electrically connected with the circuit board (15), the rotating piece (132) is arranged on the lower side of the coil (131), the first magnetic conducting piece (133) is arranged at opposite ends of the rotating piece (132), and the lower end of the rotating piece (132) is movably connected with the movable contact link (1221).

9. A low power contactor according to claim 8, wherein The coil (131) further comprises a second magnetic conducting piece (134), the second magnetic conducting piece (134) is arranged at opposite ends of the coil (131), the rotating piece (132) is arranged between the second magnetic conducting pieces (134), and the first magnetic conducting piece (133) can abut and adsorb the corresponding second magnetic conducting piece (134).

10. A low power contactor according to claim 4, wherein The movable contact link (1221) is further provided with a second elastic piece (1225), the second elastic piece (1225) corresponds to the conducting piece (1222) one by one and is fixed, and the second elastic piece (1225) is arranged on one end of the conducting piece (1222) close to the first elastic piece (142).

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