A contactor

Abstract

The present invention discloses a contactor, which belongs to the field of electrical control. The contactor comprises: a first static iron core wound with a first coil, a first moving iron core, a contact rod connected to the first moving iron core, a contact, a second static iron core wound with a second coil, a second moving iron core, a time relay, and a locking rod. The first static iron core can attract the first moving iron core to the working position, and the second static iron core can attract the second moving iron core to the working position. A first locking structure is provided at the end of the contact rod, and a second locking structure is provided at the end of the locking rod, and the first locking structure and the second locking structure cooperate to lock; the first coil and the time relay are connected in series, and are connected in parallel with the second coil as a whole; the time relay is a power-on delay type, and is disconnected after a preset power-on time; the power of the second coil is less than the power of the first coil. The present invention replaces the continuous power-on of the high-power first coil with a low-power second coil that is continuously powered on in cooperation with the locking structure, thereby reducing heat generation and saving energy.

Description

Technical Field

[0001] The present invention relates to the field of electrical control, and particularly to a contactor. Background Art

[0002] In an automatic control circuit system, a contactor is a necessary intermediate control element. It can frequently connect and disconnect circuits, and cooperate with a thermal relay load device to play a certain overload protection role. Compared with manual circuit switching by humans, using a contactor to control the circuit is more efficient, safer, more flexible, and can simultaneously connect and disconnect multiple load circuits. Therefore, it is necessary to provide a contactor.

[0003] The prior art provides such a contactor: it includes a static iron core wound with a coil, a moving iron core connected to a return spring, a contact rod, and a contact. The moving iron core is disposed opposite to the static iron core, and the contact rod is connected to the moving iron core. Among them, the wiring terminal of the coil is connected to the power supply, and the surface of the coil has an insulating layer. When energized, the static iron core generates an electromagnetic force based on the energized coil to attract the moving iron core to move, changing the contact state between the contact rod and the contact, that is, the normally closed type is disconnected, and the normally open type is closed (the contact rod and the contact can cooperate to form a normally closed contact or a normally open contact), thereby changing the working state of the electrical appliance circuit. During this process, the return spring is compressed, and when de-energized, the return spring releases and rebounds, driving the moving iron core to reset, so that the contact state between the contact rod and the contact returns to the normal state, and thus the electrical appliance circuit returns to the normal state.

[0004] The inventor found that the prior art has at least the following problems:

[0005] When the contact is connected to an electrical appliance circuit with a relatively large current, the contact or disconnection between the contact rod and the contact requires a relatively fast response speed to avoid generating electric arcs. Therefore, a high-power coil needs to be used. Moreover, when the state of the electrical appliance circuit is changed, the high-power coil is always in the energized state, consuming a large amount of energy, and continuously generating heat seriously, affecting the service life of the contactor. Summary of the Invention

[0006] The embodiments of the present invention provide a contactor that can solve the above technical problems. The specific technical solutions are as follows:

[0007] A contactor is provided, including: a first static iron core, a first moving iron core, a contact rod connected to the first moving iron core, and a contact for contacting the contact rod. A first coil is wound around the first static iron core. The contactor further includes a second static iron core, a second moving iron core, a time relay, and a locking rod. Moreover, a second coil is wound around the second static iron core;

[0008] The first moving iron core is disposed opposite to the first static iron core, and when the first coil is energized, it drives the first moving iron core to the working position, and when de-energized, the first moving iron core resets to the non-working position;

[0009] The second moving iron core is arranged opposite to the second static iron core, and when the second coil is energized, it drives the second moving iron core to the working position, and when powered off, the second moving iron core resets to the non-working position;

[0010] A first locking structure is arranged at the end of the contact rod, a second locking structure is arranged at the end of the locking rod, the locking rod can move with the second moving iron core, and when the first moving iron core and the second moving iron core are in the working position, the first locking structure and the second locking structure cooperate to lock;

[0011] The first coil and the time relay are connected in series and are integrally connected in parallel with the second coil;

[0012] The time relay is of the power-on delay type and disconnects after a preset power-on time;

[0013] The power of the second coil is less than the power of the first coil.

[0014] In a possible design, the locking rod includes: a body, and the second locking structure arranged at the right end of the body;

[0015] A contact end arranged at the lower end of the body, and the contact end contacts the second moving iron core;

[0016] A connection end arranged at the left end of the body;

[0017] The contactor further includes a first bracket for supporting the connection end.

[0018] In a possible design, the connection end is hinged to the first bracket.

[0019] In a possible design, the connection end is arranged on the first bracket so as to be movable up and down.

[0020] In a possible design, the first locking structure and the second locking structure are lock teeth with opposite directions.

[0021] In a possible design, the contactor further includes: a first spring, a second spring;

[0022] The first spring is used to reset the first moving iron core to the non-working position;

[0023] The second spring is used to reset the second moving iron core to the non-working position.

[0024] In a possible design, the contactor further includes: a position switch;

[0025] The position switch, the first coil and the time relay are connected in series and are integrally connected in parallel with the second coil;

[0026] Moreover, the position switch is closed when the second moving iron core is in the working position and is opened when the second moving iron core is in the non - working position.

[0027] In a possible design, the first static iron core is an E - type iron core.

[0028] In a possible design, the contact includes a first contact and a second contact;

[0029] The first contact and the second contact are in contact with or disconnected from the contact rod independently.

[0030] The beneficial effects brought by the technical solution provided by the embodiment of the present invention are as follows:

[0031] By providing the second static iron core and the second moving iron core, the locking rod and the contact rod can both move to the locking position, and are locked by the cooperation of the first locking structure and the second locking structure to keep the contact rod from resetting. The first coil is only powered on for a short time (i.e., the response time of the time relay) after the coil power supply is turned on, so that the contact rod moves to the locking position. During the process of changing the working state of the electrical appliance, the high - power first coil is in a power - off state, while the low - power second coil is in a power - on state. It can be seen that using the continuously - powered low - power second coil in cooperation with the locking structure to replace the continuously - powered high - power first coil can achieve the purpose of controlling the electrical appliance circuit, making the high - power coil only work in the initial stage, consuming less energy, reducing heat generation, and prolonging the service life of the contactor. Description of the Drawings

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0033] Figure 1 is a schematic structural diagram of the contactor provided by the embodiment of the present invention;

[0034] Figure 2 is a schematic diagram of the connection relationship of local components of the contactor provided by the embodiment of the present invention.

[0035] The reference numerals respectively represent:

[0036] 1 - First static iron core, 101 - First coil,

[0037] 2 - First moving iron core, 201 - First spring,

[0038] 3 - Contact rod, 301 - First locking structure,

[0039] 4 - Contact head, 401 - First contact head, 402 - Second contact head,

[0040] 5 - Second static iron core, 501 - Second coil,

[0041] 6 - Second moving iron core, 601 - Second spring,

[0042] 7 - Time relay,

[0043] 8 - Locking rod, 801 - Second locking structure,

[0044] 8a - Body, 8b - Contact end, 8c - Connection end,

[0045] 9 - Position switch. Detailed implementation mode

[0046] Unless otherwise defined, all technical terms used in the embodiments of the present invention have the same meaning as commonly understood by those skilled in the art. To make the objectives, technical solutions, and advantages of the present invention clearer, the following will further describe the embodiments of the present invention in detail with reference to the accompanying drawings.

[0047] The embodiments of the present invention provide a contactor. As shown in the accompanying drawings, this contactor includes: a first static iron core 1, a first moving iron core 2, a contact rod 3 connected to the first moving iron core 2, and a contact head 4 for contacting the contact rod 3. A first coil 101 is wound around the first static iron core 1. This contactor further includes: a second static iron core 5, a second moving iron core 6, a time relay 7, and a locking rod 8. And a second coil 501 is wound around the second static iron core 5. Figure 1

[0048] The first moving iron core 2 is disposed opposite to the first static iron core 1. And when the first coil 101 is energized, it drives the first moving iron core 2 to the working position. When powered off, the first moving iron core 2 resets to the non - working position.

[0049] The second moving iron core 6 is disposed opposite to the second static iron core 5. And when the second coil 501 is energized, it drives the second moving iron core 6 to the working position. When powered off, the second moving iron core 6 resets to the non - working position.

[0050] The end of the contact rod 3 is provided with a first locking structure 301, and the end of the locking rod 8 is provided with a second locking structure 801. The locking rod 8 can move with the second moving iron core 6. When the first moving iron core 2 and the second moving iron core 6 are in the working position, the first locking structure 301 and the second locking structure 801 cooperate to lock.

[0051] The first coil 101 and the time relay 7 are connected in series and are integrally connected in parallel with the second coil 501.

[0052] The time relay 7 is of the power-on delay type and disconnects after the preset power-on time.

[0053] The power of the second coil 501 is less than that of the first coil 101.

[0054] The working principle of the contactor provided by the embodiment of the present invention is described as follows:

[0055] For the moving iron core, its state when it is attracted to the static iron core is its working position, and vice versa is the non-working position. Taking the Figure 1 direction shown as the reference, the working position of the first moving iron core 2 is on the left and the non-working position is on the right, and the working position of the second moving iron core 6 is below and the non-working position is above. When the circuit of the electrical appliance is switched on and off, the contact 4 is connected to the electrical appliance circuit.

[0056] When the coil is powered on, the first coil 101 and the second coil 501 are simultaneously powered on to generate current. For the second coil 501, the current therein generates a magnetic field in the electromagnetic induction effect, attracting the second moving iron core 6 to move downward to the working position and attracting it to the second static iron core 5, and the locking rod 8 moves downward with the second moving iron core 6 to the locking position.

[0057] At the same time, for the first coil 101, the current therein generates a magnetic field in the electromagnetic induction effect, attracting the first moving iron core 2 to move leftward to the working position and attracting it to the first static iron core 1, and the contact rod 3 moves leftward with the first moving iron core 2 to the locking position.

[0058] At this locking position, the first locking structure 301 of the contact rod 3 cooperates with the second locking structure 801 of the locking rod 8 to lock, so that the contact rod 3 is locked by the locking rod 8. During this process, the opening and closing state formed by the cooperation of the contact rod 3 and the contact 4 is changed, and thus the state of the electrical appliance circuit is changed.

[0059] After the preset power-on time (i.e., the response time of the time relay 7), the time relay 7 disconnects. Since the first coil 101 is connected in series with the time relay 7, the first coil 101 loses power, while the second coil 501 is always in the powered-on state, attracting the second moving iron core 6 so that it is in the working position and does not move upward. At this time, the locking rod 8 is always located at the locking position to lock the contact rod 3, and the contact rod 3 cannot be reset under the locking action, so that the electrical appliance circuit remains in the changed state.

[0060] When the coil is powered off, the second coil 501 loses power, the magnetic field generated by the second static iron core 5 disappears, the second moving iron core 6 resets upward to the non-operating position, pushing the locking rod 8 upward and moving away from the locking position. At this time, the first locking structure 301 and the second locking structure 801 no longer cooperate to lock, releasing the contact rod 3. The contact rod 3 and the first moving iron core 2 move rightward to reset, so that the electrical appliance circuit returns to its normal state, and the time relay 7 returns to its normally closed state to prepare for the next start.

[0061] It can be seen that for the contactor provided by the embodiment of the present invention, by providing the second static iron core 5 and the second moving iron core 6, the locking rod 8 and the contact rod 3 can both move to the locking position. The first locking structure 301 and the second locking structure 801 cooperate to lock, so as to keep the contact rod 3 from resetting. The first coil 101 is only powered on for a short time (i.e., the response time of the time relay 7) after the coil power supply is turned on, so that the contact rod 3 moves to the locking position. During the process of changing the working state of the electrical appliance, the high-power first coil 101 is in a power-off state, while the low-power second coil 501 is in a powered-on state. It can be seen that using the continuously powered low-power second coil 501 to cooperate with the locking structure to replace the continuously powered high-power first coil 101 serves the purpose of controlling the electrical appliance circuit, enabling the high-power coil 101 to only work in the initial stage, consuming less energy, reducing heat generation, and prolonging the service life of the contactor.

[0062] It can be understood that the surfaces of the first coil 101 and the second coil 501 both have insulating layers, so that the first static iron core 1 and the second static iron core 5 will not interfere with the flow of current in the coil. The current flows circumferentially along the first coil 101 and the second coil 501, and the generated circular current causes the first static iron core 1 and the second static iron core 5 to generate magnetic fields.

[0063] In the embodiment of the present invention, the contact rod 3 and the contact 4 can cooperate to form a normally open contact or a normally closed contact. For example, if the working time of the electrical appliance is less than the non-working time and the normal state of the electrical appliance is a power-off state, the contact rod 3 and the contact 4 can be designed as a normally open contact. When the contact rod 3 is in the locking position, the contact rod 3 contacts the contact 4, and the electrical appliance circuit is closed. If the working time of the electrical appliance is greater than the non-working time and the normal state of the electrical appliance is a powered-on state, the contact rod 3 and the contact 4 can be designed as a normally closed contact. When the contact rod 3 is in the locking position, the contact rod 3 disconnects from the contact 4, and the electrical appliance circuit is disconnected.

[0064] The following elaborates on each component of the contactor provided by the embodiment of the present invention and its functions respectively:

[0065] After the power-on delay type time relay 7 is powered on in the embodiment of the present invention, the normally closed contact is disconnected, realizing the automatic opening and closing of the first coil 101 circuit, so that the first coil 101 is only powered on for a short time at the initial stage (i.e., the response time of the time relay 7). The time relay 7 is common in the art and includes air damping type, electric type, electronic type, etc. For example, the HHS3-M(AH2-Y) electronic time relay produced and sold by Xinling Electric Co., Ltd. can be applicable to the embodiment of the present invention.

[0066] The locking lever 8 is the main component of the mechanical locking component, and cooperates with the first locking structure 301 at the end of the contact lever 3 to lock the contact lever 3. Based on this function, the following limitations are made on the structure of the locking lever 8:

[0067] As shown in the appendix Figure 1 As shown, the locking lever 8 includes: a body 8a, and a second locking structure 801 provided at the right end of the body 8a;

[0068] A contact end 8b provided at the lower end of the body 8a, and the contact end 8b contacts the second moving iron core 6;

[0069] A connection end 8c provided at the left end of the body 8a;

[0070] The contactor further includes a first bracket for supporting the connection end 8c.

[0071] By setting the locking lever 8 as above, the locking lever 8 is related to the contact lever 3 and the second moving iron core 6 at the same time, so that the second locking structure 801, the contact end 8b and the connection end 8c on it each work and can also cooperate. Specifically, the first bracket supports the locking lever 8 through the connection end 8c, so that the locking lever 8 is supported while being able to move up and down. The contact end 8b contacts the second moving iron core 6. When the second moving iron core 6 moves up and down, the body 8a is driven to move up and down through the contact end 8b, and then the second locking structure 801 moves up and down. When the second locking structure 801 moves to the locking position, it can lock the contact lever 3, and when it moves to the non-locking position, it releases the contact lever 3.

[0072] Among them, by "the contact end 8b contacts the second moving iron core 6" to ensure the synchronous movement of the two, the contact between the two can be realized in the following two ways:

[0073] First, the contact end 8b simply contacts the second moving iron core 6, rather than being connected; as shown in the appendix Figure 1As shown, when the locking rod 8 is located above the second moving iron core 6, at this time, the contact end 8b and the second moving iron core 6 can be in contact in one of the described ways. When the second moving iron core 6 moves upward, it pushes the locking rod 8 to move upward. When the second moving iron core 6 moves downward, the locking rod 8 loses the support of the second moving iron core 6 and will move downward under the action of gravity until it comes into contact with the second moving iron core 6 again to enter the next up and down movement cycle process.

[0074] Secondly, the contact end 8b is connected to the second moving iron core 6. When the locking rod 8 is located below the second moving iron core 6, at this time, the contact end 8b and the second moving iron core 6 can be in contact in the second described way, so that the locking rod 8 can move with the second moving iron core 6.

[0075] The locking rod 8 is supported by the first bracket through the connecting end 8c and can move with the second moving iron core 6. For how the locking rod 8 can move with the second moving iron core 6 while being supported and then lock or release the contact rod 3, the following gives two examples:

[0076] As an example, as shown in the appendix Figure 1 The connecting end 8c is hinged to the first bracket.

[0077] By being fixed in a hinged manner, the locking rod 8 can rotate around the hinge point, so that the second locking structure 801 can achieve the purpose of moving up and down.

[0078] When the second moving iron core 6 moves up and down, it drives the locking rod 8 to rotate through the contact end 8b, drives the second locking structure 801 to move up and down, and changes the locking state between the first locking structure 301 and the second locking structure 801.

[0079] When it is fixed by a hinged manner, the locking rod 8 rotates with the up and down movement of the second moving iron core 6. In order to ensure that the second moving iron core 6 can always be in contact with the locking rod 8 during the rotation of the locking rod 8, the body 8a can be set as a plate body. This plate body can be a cuboid or a sector structure, etc. For example, when the body 8a is a cuboid plate, the connecting end 8c is located on the left side surface of the body 8a, the second locking structure 801 is located at the upper end of the right side surface of the body 8a, and the contact end 8b is located on the bottom surface of the body 8a. When the second moving iron core 6 moves up and down, it is always in contact with the bottom surface of the body 8a and drives the rotation of the locking rod 8.

[0080] Furthermore, in order to save materials and reduce weight, the body 8a can be set as an I-shaped rod, which includes an upper horizontal section, a middle vertical section, and a lower horizontal section. The middle vertical section is connected between the upper horizontal section and the lower horizontal section. The second locking structure 801 and the connecting end 8c are respectively located at the left and right ends of the upper horizontal section. The contact end 8b is located on the lower horizontal section. When the second moving iron core 6 moves up and down, it is always in contact with the lower horizontal section and drives the rotation of the locking rod 8.

[0081] As another example, the connecting end 8c is movably arranged on the first bracket in the up-and-down direction. With such an arrangement, when the second moving iron core 6 moves up and down, the main body 8a can move horizontally up and down, causing the second locking structure 801 to move horizontally up and down, thereby changing the locking state between the first locking structure 301 and the second locking structure 801.

[0082] Regarding how to arrange the connecting end 8c to be movably arranged on the first bracket in the up-and-down direction, the following gives an example for illustration:

[0083] A longitudinal chute is arranged on the first bracket, and the connecting end 8c is arranged as a slider that can slide up and down in the chute. The chute includes a wide slot for accommodating the connecting end 8c and a narrow slot for accommodating the connecting part between the connecting end 8c and the main body 8a. With such an arrangement, the locking rod 8 is limited by the chute on the first bracket, and the whole locking rod 8 can move up and down along with the sliding of the connecting end 8c. When the second moving iron core 6 moves up and down, it drives the locking rod 8 to move up and down.

[0084] The contactor provided by the embodiment of the present invention provides the suction force of the contact rod 3 through the cooperation and locking of the first locking structure 301 and the second locking structure 801. After being powered on, both the contact rod 3 and the locking rod 8 move to the locking position for cooperation and locking. They may arrive simultaneously, or one may arrive first and the other later. In order to enable locking to be achieved regardless of which one arrives at the locking position first, the first locking structure 301 and the second locking structure 801 are set as one-way locking structures. Regarding the specific setting method of the one-way locking structure, the following gives an example for illustration:

[0085] As shown in the attached Figure 1 figure, the first locking structure 301 and the second locking structure 801 are lock teeth facing in opposite directions. With such an arrangement, the first locking structure 301 and the second locking structure 801 can be locked unidirectionally, and locking can be achieved regardless of which one of the contact rod 3 and the locking rod 8 arrives at the locking position first after being powered on.

[0086] As shown in the attached Figure 1 figure, the lock teeth of the first locking structure 301 and the second locking structure 801 are right-angled triangle structures facing in opposite directions. When the first locking structure 301 is below and the second locking structure 801 is above, the tooth tip of the first locking structure 301 faces left, and the tooth tip of the second locking structure 801 faces right. If the first locking structure 301 arrives at the locking position first, when the second locking structure 801 moves down to the locking position, the vertical planes of the two fit together for locking. If the second locking structure 801 arrives at the locking position first, when the first locking structure 301 moves left, after the tooth surfaces of the two come into contact, the first locking structure 301 can continue to move left until the vertical planes of the two fit together to complete the locking, preventing the reset of the contact rod 3.

[0087] Among them, the first locking structure 301 and the second locking structure 801 can respectively include a plurality of lock teeth arranged in parallel to improve the locking effect.

[0088] The first moving iron core 2 and the second moving iron core 6 are respectively located at the working position when the first coil 101 and the second coil 501 are energized, and return to the non-working position when de-energized. For how to achieve the automatic reset of the first moving iron core 2 and the second moving iron core 6, the following gives an example:

[0089] The contactor provided by the embodiment of the present invention further includes: a first spring 201 and a second spring 601;

[0090] The first spring 201 is used to reset the first moving iron core 2 to the non-working position;

[0091] The second spring 601 is used to reset the second moving iron core 6 to the non-working position.

[0092] With such a setting, when the coil is powered off, the first moving iron core 2 and the second moving iron core 6 can be automatically reset under the spring force.

[0093] Among them, one end of the first spring 201 is connected to the second bracket on the right side of the first moving iron core 2, and the other end is connected to the first moving iron core 2. One end of the second spring 601 is connected to the third bracket above the second moving iron core 6, and the other end is connected to the second moving iron core 6.

[0094] When the first moving iron core 2 and the second moving iron core 6 are in the non-working position, the first spring 201 and the second spring 601 are in the original position state.

[0095] When the first coil 101 is energized, the first static iron core 1 generates a magnetic field to attract the first moving iron core 2 to move leftward to the working position, and the first spring 201 is in a stretched state. When the first coil 101 is de-energized, the attracting force of the first static iron core 1 on the first moving iron core 2 disappears, the first spring 201 resets to the original position state to the right, and the first moving iron core 2 is reset to the non-working position under the elastic force.

[0096] When the second coil 501 is energized, the second static iron core 5 generates a magnetic field to attract the second moving iron core 6 to move downward to the working position, and the second spring 601 is in a stretched state. When the second coil 501 is de-energized, the attracting force of the second static iron core 5 on the second moving iron core 6 disappears, the second spring 601 resets to the original position state upward, and the second moving iron core 6 is reset to the non-working position under the elastic force.

[0097] Based on the above, the first locking structure 301 and the second locking structure 801 constitute a one-way locking structure. The locking rod 8 can reach the locking position first, and the contact rod 3 reaches the locking position later. Based on this, the contactor provided by the embodiment of the present invention further includes: a position switch 9.

[0098] As shown in the appendix Figure 1and the attached Figure 2 As shown, the position switch 9, the first coil 101 and the time relay 7 are connected in series, and the whole is connected in parallel with the second coil 501;

[0099] Moreover, the position switch 9 is closed when the second moving iron core 6 is in the working position and is opened when the second moving iron core 6 is in the non - working position.

[0100] By setting the position switch 9, when the power supply is connected, the second coil 501 is energized first. When the second moving iron core 6 moves downward to the working position, the position switch 9 is closed, enabling the first coil 101 to be energized, attracting the first moving iron core 2 to drive the contact rod 3 to move to the locking position. The second coil 501 is energized first and the first coil 101 is energized later. When locking, the locking rod 8 reaches the locking position first and the contact rod 3 reaches the locking position later, further reducing the energization time of the first coil 101, saving electric energy and reducing heat generation.

[0101] Regarding how to achieve that the position switch 9 is closed when the second moving iron core 6 is in the working position and is opened when the second moving iron core 6 is in the non - working position, the following gives an example for illustration:

[0102] As attached Figure 1 As shown, the position switch 9 is located below the second moving iron core 6 and is connected to the second moving iron core 6 through a connecting rod. It can be understood that the position switch 9 is provided with contacts. The connecting rod moves up and down with the second moving iron core 6. When the connecting rod is down, it contacts the contacts, closing the position switch 9. When moving upward, it disconnects from the contacts, opening the position switch 9. The working position of the second moving iron core 6 is down and the non - working position is up. Therefore, when the second moving iron core 6 is in the working position, the connecting rod is down, closing the position switch 9. When the second moving iron core 6 is in the non - working position, the connecting rod is up, opening the position switch 9.

[0103] In the embodiment of the present invention, as attached Figure 1 As shown, the first static iron core 1 is an E - type iron core, which can protect the first coil 101 wound on its inner core, making the first coil 101 not easily damaged by mechanical trauma.

[0104] The contact 4 is connected in the electrical appliance circuit and can cooperate with the contact rod 3 to disconnect or close the electrical appliance circuit. To expand the application range of the contactor, as attached Figure 1 As shown, the contact 4 includes a first contact 401 and a second contact 402;

[0105] The first contact 401 and the second contact 402 are independently in contact with or disconnected from the contact rod 3.

[0106] With such a setting, the opening and closing states of the first contact 401 and the second contact 402 with the contact rod 3 are independent of each other. When one is in contact with the contact rod 3, the other can be in contact with or disconnected from the contact rod 3. Different combination situations can meet different usage requirements, and the application range is wide.

[0107] The following gives a specific description of the contact or disconnection between the contact 4 and the contact rod 3:

[0108] The first contact 401 and the second contact 402 can be in contact with or disconnected from the contact rod 3 simultaneously, enabling the contactor to control two electrical appliances that open and close simultaneously. Comparing two electrical appliances that open and close simultaneously and are connected in parallel to the same contact 4, by connecting the first contact 401 and the second contact 402 to different voltage sources, synchronous opening and closing of two different voltage circuits can be achieved.

[0109] Alternatively, only one of the first contact 401 and the second contact 402 is in contact with the contact rod 3 at the same time. That is, when the contact rod 3 is in the locked position, the first contact 401 is closed and the second contact 402 is disconnected; when the contact rod 3 is in the non-locked position, the first contact 401 is disconnected and the second contact 402 is closed. This can meet the usage requirement that only one of the two electrical appliances can be started at the same time. Moreover, the first contact 401 and the second contact 402 can be respectively connected to voltage sources with different voltages.

[0110] Furthermore, one of the first contact 401 and the second contact 402 can be made of an elastic material, so that there is a certain time difference between the contact or disconnection of the first contact 401 and the second contact 402, meeting the usage requirement that some components of the electrical appliance start preheating first and then the remaining components start. For example, the second contact 402 is made of an elastic material. During the movement of the contact rod 3, before reaching the locked position, it first contacts the second contact 402, closing the circuit where the second contact 402 is located and starting the preheating components, and then continues to move to the locked position to contact the first contact 401, closing the circuit where the first contact 401 is located and starting the remaining components. When disconnecting, the first contact 401 disconnects first, and then the elastic second contact 402 disconnects.

[0111] The above are only the preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A contactor, comprising: a first static iron core (1), a first moving iron core (2), a contact rod (3) connected to the first moving iron core (2), and a contact head (4) for contacting the contact rod (3). A first coil (101) is wound around the first static iron core (1). It is characterized in that the contactor further comprises: a second static iron core (5), a second moving iron core (6), a time relay (7), a locking rod (8) and a position switch (9), and a second coil (501) is wound around the second static iron core (5); The first moving iron core (2) is disposed opposite to the first static iron core (1). When the first coil (101) is energized, the first moving iron core (2) is driven to the working position. When powered off, the first moving iron core (2) resets to the non - working position; The second moving iron core (6) is disposed opposite to the second static iron core (5). When the second coil (501) is energized, the second moving iron core (6) is driven to the working position. When powered off, the second moving iron core (6) resets to the non - working position; A first locking structure (301) is provided at the end of the contact rod (3), and a second locking structure (801) is provided at the end of the locking rod (8). The locking rod (8) can move with the second moving iron core (6). When the first moving iron core (2) and the second moving iron core (6) are in the working position, the first locking structure (301) and the second locking structure (801) cooperate to lock. The first locking structure (301) and the second locking structure (801) are locking teeth with opposite orientations. The locking teeth of the first locking structure (301) and the second locking structure (801) are right - angled triangle structures with opposite orientations. When the first locking structure (301) is below and the second locking structure (801) is above, the tooth tip of the first locking structure (301) faces left and the tooth tip of the second locking structure (801) faces right; The position switch (9), the first coil (101), and the time relay (7) are connected in series and are integrally connected in parallel with the second coil (501); The contact head (4) includes a first contact head (401) and a second contact head (402). The first contact head (401) and the second contact head (402) are independently in contact with or disconnected from the contact rod (3); wherein, the second contact head (402) is made of an elastic material; The time relay (7) is of the power - on delay type and disconnects after a preset power - on time; The power of the second coil (501) is less than the power of the first coil (101); The position switch (9) is located below the second moving iron core (6) and is connected to the second moving iron core (6) through a connecting rod. Contacts are provided on the position switch (9). When the second moving iron core (6) moves downward to the working position, the second moving iron core (6) drives the connecting rod to move downward, and the connecting rod contacts the contacts to close the position switch (9). When the second moving iron core (6) moves upward to the non-working position, the second moving iron core (6) drives the connecting rod to move upward, and the connecting rod disconnects from the contacts to open the position switch (9). Wherein, when the power supply is connected, the second coil (501) is energized first, and then the first coil (101) is energized. The second locking structure (801) reaches the locking position first, and then the first locking structure (301) moves leftward. The contact rod (3) contacts the second contact (402) first to close the circuit where the second contact (402) is located and start the preheating component. Then, after the tooth surfaces of the locking teeth of the first locking structure (301) and the second locking structure (801) contact, the first locking structure (301) can continue to move leftward until the vertical planes of the locking teeth of the first locking structure (301) and the second locking structure (801) are fitted to complete the locking, hindering the reset of the contact rod (3). At this time, the contact rod (3) contacts the first contact (401) to close the circuit where the first contact (401) is located and start the remaining components.

2. The contactor according to claim 1, characterized in that, the locking rod (8) includes: a body (8a), and the second locking structure (801) provided at the right end of the body (8a); a contact end (8b) provided at the lower end of the body (8a), and the contact end (8b) contacts the second moving iron core (6); a connection end (8c) provided at the left end of the body (8a); The contactor further includes a first bracket for supporting the connection end (8c).

3. The contactor according to claim 2, characterized in that, the connection end (8c) is hinged to the first bracket.

4. The contactor according to claim 2, characterized in that, the connection end (8c) is movably arranged up and down on the first bracket.

5. The contactor according to claim 1, characterized in that, the contactor further includes: a first spring (201), a second spring (601); the first spring (201) is used to reset the first moving iron core (2) to the non-working position; the second spring (601) is used to reset the second moving iron core (6) to the non-working position.

6. The contactor according to claim 1, characterized in that, the first static iron core (1) is an E-shaped iron core.

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