Push rod assembly, method of manufacturing the same, and relay

Abstract

To provide a relay that improves safety level and structural performance.SOLUTION: A push rod assembly includes a push rod, an auxiliary movable contact and an isolation cover, the auxiliary movable contact includes an auxiliary movable contact piece and an auxiliary movable contact point, and an end portion of the auxiliary movable contact piece is provided with the auxiliary movable contact point. The isolation cover is connected to the push rod and the auxiliary movable contact piece, and causes the isolation cover and the auxiliary movable contact to follow the movement of the push rod. The isolation cover is used to cover the auxiliary movable contact point and isolate the auxiliary movable contact point and a main movable contact. The isolation cover is used to extend the creepage distance from the main movable contact to the auxiliary movable contact. The push rod assembly can isolate the main movable contact and the auxiliary movable contact, which avoids an arc generated at the time of separation of the main contact point from contaminating the auxiliary movable contact point, and improves the safety level and structural performance of the relay.SELECTED DRAWING: Figure 8

Description

[Technical field]

[0001] The present invention relates to the technical field of electronic control devices, and more particularly to a push rod assembly and its manufacturing method, and a relay. [Background technology]

[0002] A relay is an electronic control device, which has a control system (also called input circuit) and a controlled system (also called output circuit), and is generally applied in automatic control circuits. In fact, a relay is an "automatic switch" that controls a larger current with a smaller current. Therefore, it plays the role of automatic adjustment, safety protection, conversion circuit, etc. in the circuit.

[0003] In conventional relays, auxiliary contacts are generally installed to monitor the open / close state between the movable contact and the fixed contact by contacting or separating the auxiliary movable contact and the auxiliary fixed contact in the auxiliary contact. However, there are several factors that affect the operating state of the auxiliary movable contact in a relay. First, the arc generated when the main contact separates may contaminate the auxiliary movable contact, affecting the normal operation of the auxiliary movable contact. Second, if the creepage distance between the auxiliary movable contact and the main movable contact is too short, it will affect the operating performance of the auxiliary movable contact. It should be noted that if the auxiliary movable contact cannot operate normally, it will affect the monitoring state of the auxiliary movable contact with the main contact, and further affect the safety and structural performance of the relay. Summary of the Invention

[0004] The present invention provides a push rod assembly and a manufacturing method thereof, and a relay, in which the push rod assembly can isolate a main moving contact and an auxiliary moving contact, and can prevent the auxiliary moving contact from being contaminated by an arc generated when the main contacts are separated, and can increase the creepage distance between the main moving contact and the auxiliary moving contact by means of an isolation cover, thereby improving the safety level and structural performance of the relay.

[0005] The present invention provides a push rod assembly, comprising: a push rod, an auxiliary movable contact and an isolation cover, the auxiliary movable contact comprises an auxiliary movable contact piece and an auxiliary movable contact, the auxiliary movable contact is provided at an end of the auxiliary movable contact piece, the isolation cover is connected to the push rod and the auxiliary movable contact piece, the isolation cover and the auxiliary movable contact follow the movement of the push rod, the isolation cover is used to cover the auxiliary movable contact and isolate the auxiliary movable contact and the main movable contact, and the isolation cover is used to extend the creepage distance from the main movable contact to the auxiliary movable contact.

[0006] According to some embodiments of the present invention, a portion of the auxiliary movable contact piece is covered inside a portion of the isolation cover, the remaining portion of the auxiliary movable contact piece extends from the portion of the isolation cover, and the other portion of the isolation cover covers the remaining portion of the auxiliary movable contact piece extending from the isolation cover and the auxiliary movable contact.

[0007] According to some embodiments of the present invention, the isolation cover includes a body and a cover case.

[0008] The body portion is connected to the push rod and the auxiliary movable contact piece.

[0009] The cover case is connected to the body portion, and covers the remaining portion of the auxiliary movable contact piece extending from the body portion and the auxiliary movable contact.

[0010] According to some embodiments of the present invention, an auxiliary movable contact is provided at both ends of the auxiliary movable contact along the longitudinal direction of the auxiliary movable contact, the number of the cover cases is two, the two cover cases are arranged on opposite sides of the main body along the longitudinal direction of the auxiliary movable contact, and each of the cover cases covers the auxiliary movable contact at the same end of the auxiliary movable contact.

[0011] According to some embodiments of the present invention, a first through hole is opened in a central region of the auxiliary movable contact along the longitudinal direction of the auxiliary movable contact, the main body covers the central region, one axial end of the push rod is drilled into the first through hole, and one axial end of the push rod is integrally molded within the main body.

[0012] According to some embodiments of the present invention, the cover case is provided with an opening in a direction perpendicular to the axial direction of the push rod.

[0013] According to some embodiments of the present invention, along the arrangement direction of the two cover cases, each of the cover cases is provided with an opening on one side facing away from the other cover case.

[0014] According to some embodiments of the present invention, the cover case comprises: two first plates, the two first plates being disposed opposite each other, and the arrangement direction of the two first plates being perpendicular to the axial direction of the push rod and perpendicular to the longitudinal direction of the auxiliary movable contact piece; a second plate body, the second plate body being connected to one end of each of the first plates toward the main body portion along the longitudinal direction of the auxiliary movable contact piece; and a top plate, the top plate being connected to the two first plates and the second plate to form a chamber for accommodating the auxiliary movable contact, and the top plate and the two first plates forming the opening on one side facing away from the main body portion.

[0015] According to some embodiments of the present invention, the openings in the two cover cases are arranged along a diagonal line of the isolation cover, and the main body portion forms the opening together with each of the cover cases.

[0016] According to some embodiments of the present invention, the cover case includes a first plate and a second plate.

[0017] The first plate is connected to the main body, and the extending direction of the first plate is perpendicular to the axis of the push rod.

[0018] The second plate extends from the first plate, and the extending direction of the second plate is perpendicular to the extending direction of the first plate, and the opening is provided in the second plate.

[0019] According to some embodiments of the present invention, the push rod assembly further includes a contact holder, the contact holder being connected to the isolation cover and the contact holder following the movement of the push rod.

[0020] According to some embodiments of the present invention, the contact holder is connected to the push rod, the auxiliary movable contact and the isolation cover by an integral injection molding manner.

[0021] According to some embodiments of the present invention, the contact holder includes a bottom plate, a top plate and two side plates arranged opposite each other, the two side plates being located on the same side of the bottom plate along the axial direction of the push rod, and the top plate is connected to the other ends of the two side plates facing away from the bottom plate.

[0022] According to some embodiments of the present invention, the isolation cover further includes two extension structures extending from opposite sides of the main body portion along the arrangement direction of the two side plates, each of the extension structures extending in a direction away from the push rod, and each of the extension structures covering one end of the side plate adjacent to the main body portion.

[0023] According to some embodiments of the present invention, a connection structure is provided between the cover case and the adjacent extension structure, the connection structure is connected to the cover case and the main body portion and / or the extension structure, and is used to seal a gap between the cover case and the main body portion and / or the extension structure.

[0024] According to some embodiments of the present invention, an elastic member is attached to one side of the isolation cover facing away from the push rod along the axial direction of the push rod.

[0025] According to some embodiments of the present invention, an isolation barrier is provided on one side of the body part facing away from the push rod along the axial direction of the push rod, The isolating barrier extends from a surface of the body portion in a direction away from the push rod, and the isolating barrier is provided on at least one side of the elastic member along a radial direction of the push rod.

[0026] According to some embodiments of the present invention, the isolation cover is connected to the push rod and the auxiliary movable contact by an integral injection molding manner.

[0027] The present invention further provides a relay, which includes a push rod assembly provided by any of the above technical solutions.

[0028] According to some embodiments of the present invention, the device further includes a yoke plate and an auxiliary pull-out member, wherein the auxiliary pull-out member and the push rod in the push rod assembly pass through the yoke plate, and the auxiliary pull-out member is provided with an auxiliary fixed contact corresponding to the auxiliary movable contact on one side of the yoke plate facing the auxiliary movable contactor.

[0029] The present invention further provides a method for manufacturing a push rod assembly, by connecting the push rod and the auxiliary movable contact by an injection molding process, and forming an isolation cover, which covers the auxiliary movable contact of the auxiliary movable contact.

[0030] The present invention further provides a method of manufacturing a push rod assembly, comprising: forming a first structural member at a predetermined position of the push rod and the auxiliary movable contact by an injection molding process, and connecting the push rod and the auxiliary movable contact through the first structural member; and again by an injection molding process, manufacturing a second structural member on the surface of the first structural member to form an isolation cover, wherein the isolation cover is used to cover the auxiliary movable contact of the auxiliary movable contactor and isolate the auxiliary movable contactor from the main movable contactor, and the isolation cover is used to extend the creepage distance from the main movable contactor to the auxiliary movable contactor.

[0031] According to some embodiments of the present invention, a manufacturing method for forming a first structural member at a predetermined position of the push rod and the auxiliary movable contact by an injection molding process includes the following steps: Providing a contact holder; The method further includes forming the first structural member at a predetermined position of one axial end of the push rod, the auxiliary movable contact, and the contact holder by an injection molding process.

[0032] An embodiment of the above invention has at least the following advantages or beneficial effects.

[0033] In the push rod assembly provided by the present invention, the isolation cover covers the auxiliary movable contact, thereby isolating the auxiliary movable contact from the main movable contact, and the movable contact in the main movable contact and the auxiliary movable contact in the auxiliary movable contact are separated on both sides of the isolation cover along the axial direction of the push rod. Thus, when the movable contact and the fixed contact are separated and an arc occurs, the isolation cover provides isolation protection for the auxiliary movable contact, and can prevent the auxiliary movable contact from being contaminated by the arc. At the same time, in the push rod assembly provided by the present invention, the isolation cover can increase the creepage distance between the auxiliary movable contact and the main movable contact, which can be applied to a higher voltage environment, expanding the application scenario of the push rod assembly, and improving the insulation level and structural performance of the relay applied to the push rod assembly.

[0034] In addition, in the push rod assembly provided by the present invention, the isolation cover is connected to the auxiliary movable contact and the push rod so that the isolation cover and the auxiliary movable contact follow the push rod, so that the overall dimensional chain is small, the control precision is high, and the consistency of the movement trajectory of the movable contact and the auxiliary movable contact is ensured. In addition, since the isolation cover follows the auxiliary movable contact, there is no need to reserve a moving space for the auxiliary movable contact in advance, so the structure is compact, and the number of parts is simplified, the cost is reduced, the assembly process is reduced, and the risk of non-conductivity caused by shavings is avoided. [Brief description of the drawings]

[0035] [Figure 1] FIG. 2 is a plan view of a relay provided by an embodiment of the present invention. [Diagram 2] 2 is a cross-sectional view corresponding to the line AA in FIG. 1. [Diagram 3] FIG. 3 is a schematic diagram of the three-dimensional structure after the push rod assembly in FIG. 2 is assembled with the main movable contact. [Figure 4] FIG. 4 is a schematic plan view of the structure in FIG. [Diagram 5] 5 is a cross-sectional view corresponding to the line BB in FIG. 4. [Figure 6] FIG. 4 is a schematic plan view of the structure in FIG. 3 from another angle. [Figure 7] 7 is a cross-sectional view corresponding to line CC in FIG. 6. [Figure 8] FIG. 3 is a schematic diagram showing the three-dimensional structure of the push rod assembly in FIG. 2. [Figure 9] FIG. 9 is a schematic diagram showing the three-dimensional structure of the push rod assembly in FIG. 8 as viewed from another angle. [Figure 10] FIG. 9 is a schematic diagram of a surface creepage of the push rod assembly in FIG. 8. [Figure 11] FIG. 11 is an exploded structural schematic diagram of the push rod assembly in FIG. 10. [Figure 12] FIG. 12 is an exploded schematic view of a portion of the structure of the push rod assembly in FIG. 11. [Figure 13]FIG. 12 is a structural schematic diagram of the remaining portion of the push rod assembly in FIG. 11 . [Figure 14] FIG. 14 is a structural schematic diagram of the structure in FIG. 13 seen from another angle. [Figure 15] FIG. 13 is a schematic diagram of a second configuration of the push rod assembly after being assembled with the main moving contact according to an embodiment of the present invention. [Figure 16] FIG. 2 is a schematic diagram of a second configuration of a push rod assembly according to an embodiment of the present invention. [Figure 17] FIG. 17 is a schematic diagram of the three-dimensional structure of the push rod assembly in FIG. 16. [Figure 18] FIG. 12 is a structural schematic diagram of the remaining portion of the push rod assembly in FIG. 11 . [Figure 19] FIG. 19 is a structural schematic diagram of the structure in FIG. 18 seen from another angle. [Figure 20] 3 is an enlarged cross-sectional view of the auxiliary drawer member in FIG. 2. [Figure 21] FIG. 21 is a structural diagram of the auxiliary drawing member in FIG. 20. [Figure 22] FIG. 22 is a second structural diagram of the auxiliary drawer member in FIG. 21. [Figure 23]4 is a flowchart of a method for manufacturing a push rod assembly in accordance with an embodiment of the present invention. [Explanation of symbols] 10 relay, 100 yoke plate, 200 insulating cover, 300 main contact portion, 310 main movable contact, 311 movable contact, 320 fixed contact, 321 pull-out end, 322 fixed contact, 400 push rod assembly, 410 push rod, 420 auxiliary movable contact, 421 auxiliary movable contact piece, 4211 first through hole, 422 auxiliary movable contact, 430 isolation cover, 431 main body, 431a first structural member, 431b second structural member, 4311 isolation barrier, 4312 extension structure, 4313 limiting structure, 432 cover case, 4321 opening, 4322 first plate body, 4323 second plate body, 4324 top plate, 4325 auxiliary port, 433 connection structure, 440 elastic member, 450 Contact holder, 451 side plate, 452 bottom plate, 453 top plate, 500 magnetic circuit assembly, 600 auxiliary drawer member, 700 connection assembly, 710 ceramic member, 720 transition piece. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0036] Hereinafter, exemplary embodiments will be described more fully with reference to the accompanying drawings. However, exemplary embodiments can be implemented in various forms and should not be construed as being limited to the embodiments described herein. Rather, these embodiments are provided so that the present invention is complete and complete and fully conveys the concept of exemplary embodiments to those skilled in the art. In the drawings, the same reference numerals indicate the same or similar configurations, and detailed descriptions thereof will be omitted.

[0037] As shown in FIGS. 1 and 2, an embodiment of the present invention provides a relay 10, which includes a yoke plate 100, an insulating cover 200, a main contact portion 300, a push rod assembly 400 and a magnetic circuit assembly 500.

[0038] It should be noted that the terms "comprises", "having" and any variations thereof in the embodiments of the present invention are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or apparatus comprising a series of steps or units is not limited to the steps or units already recited, but optionally further includes steps or units not recited, or optionally further includes other steps or assemblies inherent to those processes, methods, products or apparatus.

[0039] A through-hole structure is provided in the yoke plate 100, and the through-hole structure penetrates both sides in the thickness direction of the yoke plate 100. An insulating cover 200 is provided on one surface of the yoke plate 100 and covers the through-hole structure of the yoke plate 100.

[0040] The main contact portion 300 includes a main movable contactor 310 and two fixed contactors 320. The fixed contactor 320 is fixed to the insulating cover 200, and one end of the fixed contactor 320 penetrates to the outside of the insulating cover 200 to form a drawn-out end 321, and the other end of the fixed contactor 320 located inside the insulating cover 200 forms a fixed contact 322. Note that the fixed contactor 322 and the fixed contactor 320 may have a separate structure or an integral structure, that is, the fixed contactor 322 may be attached solely to the surface of the fixed contactor 320, or the fixed contactor 322 may be formed by a part of the fixed contactor 320. The main movable contactor 310 is movably installed inside the insulating cover 200, and the main movable contactor 310 includes a main movable contactor, and movable contacts 311 are provided at both ends of the main movable contactor in the longitudinal direction. Similarly, the movable contact 311 and the main movable contactor may be a separate structure or an integral structure, i.e., the movable contact 311 may be attached solely to the surface of the main movable contactor, or the movable contact 311 may be formed by a part of the main movable contactor. Each movable contact 311 corresponds to one fixed contact 322, and the movable contact 311 contacts or separates from the corresponding fixed contact 322 according to the movement of the main movable contactor 310, thereby realizing the on or off of the main contact of the main contact portion 300.

[0041] The movable contact 311 and the fixed contact 322 in the main contact portion 300 form a main contact.

[0042] The push rod assembly 400 passes through the yoke plate 100. Specifically, the push rod assembly 400 is movably mounted in the through-hole structure of the yoke plate 100. The main movable contact 310 of the main contact portion 300 follows the movement of the push rod assembly 400, and when the push rod assembly 400 moves back and forth, it can drive the movement of the main movable contact 310, and further realize the on or off of the main contact of the main contact portion 300.

[0043] The magnetic circuit assembly 500 is used to drive the reciprocating motion of the push rod assembly 400, make the main movable contact 310 follow the motion of the push rod assembly 400, and further realize the on or off of the main contact of the main contact part 300. In Fig. 2, the magnetic circuit assembly 500 is approximately surrounded by a dashed line frame, and there may be deviations in the specific position.

[0044] The push rod assembly 400 in the relay 10 provided by the embodiment of the present invention may be the push rod assembly 400 in any of the following technical solutions. Of course, the push rod assembly 400 can also be configured in other ways as needed, and the description thereof will be omitted here.

[0045] With reference to FIG. 1 and FIG. 2 and the structure shown in FIG. 3 to FIG. 19, the embodiment of the present invention provides a push rod assembly 400. As shown in FIG. 3 to FIG. 9, the push rod assembly 400 includes a push rod 410, an auxiliary movable contact 420, and an isolation cover 430, the auxiliary movable contact 420 includes an auxiliary movable contact piece 421 and an auxiliary movable contact 422, and the auxiliary movable contact piece 422 is provided at the end of the auxiliary movable contact piece 421. The isolation cover 430 is connected to the push rod 410 and the auxiliary movable contact piece 421, so that the isolation cover 430 and the auxiliary movable contact 420 follow the movement of the push rod 410. The isolation cover 430 is used to cover the auxiliary movable contact 422 and isolate the auxiliary movable contact 422 and the main movable contact 310. And the isolation cover 430 is used to extend the creepage distance from the main movable contact 310 to the auxiliary movable contact 420.

[0046] It should be noted that in the push rod assembly 400 provided by the embodiment of the present invention, the isolation cover 430 covers the auxiliary moving contact 422, thereby isolating the auxiliary moving contact 422 from the main moving contactor 310, and separating the moving contact 311 of the main moving contactor 310 and the auxiliary moving contact 422 of the auxiliary moving contactor 420 on both sides of the isolation cover 430 along the axial direction of the push rod 410. Thus, when the moving contact 311 and the fixed contact 322 are separated and an arc occurs, the isolation cover 430 can provide isolation protection for the auxiliary moving contact 422, and prevent the auxiliary moving contact 422 from being contaminated by the arc.

[0047] At the same time, in the push rod assembly 400 provided by the embodiment of the present invention, the isolation cover 430 can increase the creepage distance between the auxiliary moving contact 421 and the main moving contact 310, so that the push rod assembly 400 can be applied to a higher voltage environment, expanding the application scenarios of the push rod assembly 400, and improving the insulation level and structural performance of the relay 10 to which the push rod assembly 400 is applied.

[0048] In addition, in the push rod assembly 400 provided by the embodiment of the present invention, the isolation cover 430 is connected to the auxiliary movable contact 420 and the push rod 410 so that the isolation cover 430 and the auxiliary movable contact 420 move following the movement of the push rod 410, so that the overall dimensional chain is small, the control precision is high, and the consistency of the movement trajectories of the movable contact 311 and the auxiliary movable contact 422 is ensured. In addition, since the isolation cover 430 follows the movement of the auxiliary movable contact piece 421, there is no need to reserve a moving space for the auxiliary movable contact 420 in advance, and the structure is compact, which further simplifies the number of parts, reduces costs, reduces the assembly process, and avoids the risk of non-conductivity caused by shavings.

[0049] 6 to 9, in one embodiment, a part of the auxiliary movable contact 421 is covered inside a part of the isolation cover 430, and the remaining part of the auxiliary movable contact 421 extends from the part of the isolation cover 430. The other part of the isolation cover 430 covers the remaining part of the auxiliary movable contact 421 extending from the isolation cover 430 and the auxiliary movable contact 422. In other words, along the axial direction of the push rod 410, the isolation cover 430 has a sealed structure on one side of the auxiliary movable contact 421 facing the push rod, and the surface of the isolation cover 430 has no hole structure to provide a creeping path.

[0050] In addition, in the push rod assembly 400 provided by the embodiment of the present invention, the isolation cover 430 can better extend the creepage distance between the auxiliary moving contact 421 and the main moving contact 310, thereby improving the insulation level and structural performance of the relay 10 to which the push rod assembly 400 is applied. Furthermore, the push rod assembly 400 can be applied to a higher voltage environment, expanding the application scenario.

[0051] 8 and 9 , in one specific embodiment, the isolation cover 430 includes a body 431 and a cover case 432, and the body 431 is connected to the push rod 410 and the auxiliary movable contact 421. The cover case 432 is connected to the body 431, and covers the remaining part of the auxiliary movable contact 421 extending from the body 431 and the auxiliary movable contact 422.

[0052] In this embodiment, the cover case 432 separates the auxiliary moving contact 422 from the moving contact 311. When the moving contact 311 and the fixed contact 322 are separated and an arc occurs, the cover case 432 can provide isolation protection for the auxiliary moving contact 422, and prevent the auxiliary moving contact 422 from being contaminated by the arc. At the same time, the cover case 432 can extend the creepage distance from the main moving contact 310 to the auxiliary moving contact 420.

[0053] 3 to 7, an elastic member 440 is attached to one side of the isolation cover 430 facing away from the push rod 410 along the axial direction of the push rod 410. The elastic member 440 abuts against the main moving contact 310, and is thus charged by the main moving contact 310. Thus, in this embodiment, the creepage distance from the main moving contact 310 to the auxiliary moving contact 421 is the creepage distance from the elastic member 440 to the auxiliary moving contact 421. Note that the elastic member 440 in the embodiment of the present invention may be a contact spring or a leaf spring, and for example, the elastic member 440 in each drawing is shown as a contact spring.

[0054] The drawn-out end 321 of the fixed contact 320 is used to connect to a load, and the current that flows after the main movable contact 310 contacts the two fixed contacts 322 is a strong current. In addition, since the elastic member 440 is in contact with the main movable contact 310 and is conductive, the current that flows through the elastic member 440 is also a strong current. Conversely, the current that flows through the auxiliary movable contact 420 and the auxiliary drawn-out member 600 (shown in FIG. 2) is a weak current. The isolation cover 430 can further separate the elastic member 440 and the auxiliary movable contact 422, thereby separating the strong current from the weak current.

[0055] 3 to 7, along the axial direction of the push rod 410, the elastic member 440 and the auxiliary movable contact 420 are separated on both sides of the isolation cover 430. The creepage path from the elastic member 440 to the auxiliary movable contact 420 includes a portion from the main body 431 to an edge of the cover case 432 away from the main body 431, and a portion from the edge of the cover case 432 to the auxiliary movable contact 420 after passing the edge of the cover case 432. In this embodiment, the surface of the isolation cover 430 has no hole structure to provide the creepage path.

[0056] As a result, the isolation cover 430 in this embodiment of the present invention can extend the creepage distance from the elastic member 440 to the auxiliary movable contact 420, thereby improving the insulation level of the relay 10 and improving the structural and safety performance of the relay 10.

[0057] In addition, in the push rod assembly 400 provided in this embodiment, the isolation cover 430 and the auxiliary movable contact 420 follow the movement of the push rod 410, so that the isolation cover 430 does not need to reserve a moving space for the auxiliary movable contact 420 in advance, making the structure of the relay 10 more compact and the volume smaller.

[0058] For example, the isolation cover 430 is connected to the push rod 410 and the auxiliary movable contact 420 by an integral injection molding manner. In other words, the isolation cover 430, the push rod 410 and the auxiliary movable contact 420 are integrally formed by an injection molding manner. When the push rod 410 moves, the isolation cover 430 and the auxiliary movable contact 420 can move together with the push rod 410.

[0059] In addition, in the push rod assembly 400 provided by the embodiment of the present invention, the isolation cover 430, the auxiliary movable contact 420 and the push rod 410 are designed as an integrated unit, which reduces the dimensional chain, improves the control accuracy, and ensures the consistency of the movement trajectories of the movable contact 311 and the auxiliary movable contact 422.

[0060] Of course, in other embodiments, the isolation cover 430 and the auxiliary movable contact 420, and the isolation cover 430 and the push rod 410 may be connected by adhesive, fastening, etc., and the detailed description is omitted.

[0061] The isolation cover 430 can be made of high temperature resistant insulating plastic, such as PA6T, PA10T, or the like.

[0062] 9, an auxiliary movable contact 422 is provided at both ends of the auxiliary movable contact piece 421 along the longitudinal direction of the auxiliary movable contact piece 421. The number of cover cases 432 is two, and the two cover cases 432 are arranged on opposite sides of the main body 431 along the longitudinal direction of the auxiliary movable contact piece 421, and each cover case 432 covers the auxiliary movable contact 422 at the same end of the auxiliary movable contact piece 421.

[0063] In addition, in this embodiment, each cover case 432 provides effective isolation protection for the corresponding auxiliary movable contact 422, and prevents the auxiliary movable contact 422 from being contaminated by arcs, thereby extending the service life of the auxiliary movable contact 422, and further improving the detection accuracy and structural performance of the relay 10.

[0064] In order to facilitate the injection molding of the auxiliary movable contact piece 421 and the push rod 410 as a single unit, a first through hole 4211 (shown in FIG. 12) is formed in the central region of the auxiliary movable contact piece 421 along the longitudinal direction of the auxiliary movable contact piece 421, the main body 431 covers the central region, and one axial end of the push rod 410 is drilled in the first through hole 4211. In this way, when the isolation cover 430 is formed by an injection molding process, one axial end of the push rod 410 can be integrally molded in the main body 431, thereby simplifying the number of structural members and reducing manufacturing difficulty.

[0065] Continuing to refer to the structure shown in FIG. 9, the cover case 432 has one side facing away from the main movable contact 310 in an open state, which facilitates assembly and injection molding operations.

[0066] 8 and 9, in one embodiment, an opening 4321 is provided in the cover case 432 in a direction perpendicular to the axial direction of the push rod 410. Note that in the relay 10 provided by the embodiment of the present invention, the auxiliary fixed contact (described in the following structure) and the auxiliary movable contact 422 may be in a normally open state, and the opening 4321 does not affect the structural performance of the relay 10.

[0067] In addition, the structural design of the opening 4321 can achieve the effects of weight reduction and visualization of assembly, and further facilitates the demolding process after injection molding, thereby reducing the manufacturing difficulty of the push rod assembly 400.

[0068] The number of openings 4321 in each cover case 432 may be one, two, three, etc., and specifically, they may be provided as necessary.

[0069] When the isolating cover 430 is provided, there are various possibilities for the structure of the isolating cover 430. Hereinafter, examples of the structure of the isolating cover 430 will be described with reference to the installation position of the opening 4321.

[0070] 8 and 9, in one embodiment, along the arrangement direction of the two cover cases 432, each cover case 432 is provided with an opening 4321 on one side facing away from the other cover case 432. This installation form can facilitate the punching operation and reduce the difficulty of manufacturing and assembly.

[0071] It should also be noted that in this embodiment, the structural design in which the two openings 4321 are located on opposite sides of the cover case 432 has a foolproof function, and there is no need to worry about whether the cover cases 432 on both sides of the isolation cover 430 are arranged in reverse.

[0072] In this embodiment, as shown in Fig. 8 and Fig. 9, the cover case 432 includes two first plates 4322, a second plate 4323, and a top plate 4324. Here, the two first plates 4322 are installed opposite to each other, and the arrangement direction of the two first plates 4322 is perpendicular to the axial direction of the push rod 410 and perpendicular to the longitudinal direction of the auxiliary movable contact piece 421. In other words, the arrangement direction of the two first plates 4322 is parallel to the width direction of the auxiliary movable contact piece 421. In addition, the two first plates 4322 may be installed perpendicular to the yoke plate 100. The second plate 4323 is connected to one end of the two first plates 4322 facing the main body 431, and the second plate 4323 is connected to the main body 431. The top plate 4324 is connected to the two first plates 4322 and the second plate 4323, thereby forming a chamber for accommodating the auxiliary movable contact 422. In addition, the top plate 4324 and the two first plates 4322 form an opening 4321 on one side facing away from the body 431.

[0073] In addition, in this embodiment, the two first plates 4322, the second plate 4323 and the top plate 4324 are equivalent to surrounding the auxiliary movable contact 422 from four directions, which optimizes the isolation protection that the cover case 432 provides for the auxiliary movable contact 422, and prevents the arc generated when the main contacts are separated from contaminating the auxiliary movable contact 422.

[0074] At the same time, in this embodiment, by connecting the second plate 4323 or another plate to the main body 431, the remaining part of the auxiliary movable contact 421 that penetrates the main body 431 is covered by the isolation cover 430, and the surface of the isolation cover 430 has no hole structure to provide a creeping path, thereby extending the creeping path and further the creeping distance from the elastic member 440 to the auxiliary movable contact 421.

[0075] In order to clearly understand the creepage path from the elastic member 440 to the auxiliary movable contact piece 421 in this embodiment, reference is made to the structure shown in Fig. 10. As exemplarily shown in Fig. 10, the axial direction of the push rod assembly 400 is the Z direction, the longitudinal direction of the auxiliary movable contact piece 421 is the X direction, and the width direction of the auxiliary movable contact piece 421 is the Y direction, where the X direction, the Y direction, and the Z direction are perpendicular to each other in pairs.

[0076] In the process of the current flowing from the elastic member 440 to the auxiliary movable contact piece 421, the current flows along the surface of the isolation cover 430, and there is a possibility that paths a and b exist. If the dimension in the X direction of the first plate 4322 is larger than the dimension in the X direction of the top plate 4324, the current flows along path a on the surface of the top plate 4324. Conversely, if the dimension in the X direction of the first plate 4322 is smaller than the dimension in the X direction of the top plate 4324, the current flows along path b on the surface of the first plate 4322.

[0077] 10, in the process of the current flowing along the path a, the current flows along the outer surface of the second plate 4323 close to the elastic member 440 (shown in FIG. 3) to the top surface of the top plate 4324. Thereafter, the current flows along the top surface of the top plate 4324 in the X direction until it reaches one edge of the top plate 4324 facing away from the main body 431, and the current is turned back to the bottom surface of the top plate 4324. Thereafter, the current moves in the reverse direction to the X direction along the bottom surface of the top plate 4324 until it reaches the auxiliary movable contact piece 421.

[0078] 10, in the process of the current flowing along the path b, the current flows along the outer surface of the second plate 4323 close to the elastic member 440 to the outer surface of the first plate 4322. Thereafter, as shown in FIG. 10, the current flows along the outer surface of the first plate 4322 in the X direction until it reaches one edge of the first plate 4322 facing away from the main body 431, and turns back to the inner surface of the first plate 4322. Thereafter, the current moves in the reverse direction in the X direction along the inner surface of the first plate 4322 until it reaches the auxiliary movable contact piece 421.

[0079] 3 to 10, the push rod assembly 400 further includes a contact holder 450, which is connected to the isolation cover 430 and follows the movement of the push rod 410. The contact holder 450 may be connected to the push rod 410, the auxiliary movable contact 420 and the isolation cover 430 through an integral injection molding manner, which further improves the integration degree of the push rod assembly 400, optimizes the movement following effect of each structural member, and reduces the difficulty of assembly.

[0080] As shown in Figures 3 to 9 and 12, in one specific embodiment, the contact holder 450 includes a bottom plate 452, a top plate 453 and two side plates 451 installed opposite each other, the two side plates 451 are located on the same side of the bottom plate 452 along the axial direction of the push rod 410, and the top plate 453 is connected to the other ends of the two side plates 451 facing away from the bottom plate 452.

[0081] There are various possibilities for the structure of the contact holder 450. For example, as shown in Fig. 11, in this embodiment, the bottom plate 452 and the two side plates 451 are an integral structure, the two side plates 451 and the bottom plate 452 form a U-shaped structure, and the bottom plate 452 is covered by the inside of the main body 431. A through-hole structure is provided in the bottom plate 452, and the push rod 410 is drilled therein.

[0082] 3 to 7 with reference to Fig. 13, after assembling related structural members into the U-shaped structure formed by the bottom plate 452 and the side plates 451, the top plate 453 is attached to one side of the two side plates 451 facing away from the bottom plate 452. After the top plate 453 is connected to the U-shaped structure, it can elastically bias the elastic member 440 between the bottom surface of the main moving contact 310 and the body part 431, and press the main moving contact 310 against the inside of the top plate 453.

[0083] When assembling the isolation cover 430 in the push rod assembly 400 provided in the embodiment of the present application, the body 431 is divided into two parts, a first structural member 431a and a second structural member 431b, as shown in Figures 10 and 11, where the first structural member 431a is formed in a first injection molding operation, and the second structural member 431b is formed in a second injection molding operation. Exemplarily, the shape of the second structural member 431b is as shown in Figures 13 and 14.

[0084] After the first injection molding process, the push rod 410, the auxiliary movable contact 420 and the first structural member 431a form an integral structure. Then, the second structural member 431b is manufactured (formed) on the surface of the integral structure. The second structural member 431b covers at least a part of the first structural member 431a to form the complete main body 431, and the cover case 432 is formed synchronously.

[0085] 8 , the isolation cover 430 further includes two extending structures 4312 extending from opposite sides of the main body 431 along the arrangement direction of the two side plates 451. Each extending structure 4312 extends in a direction facing away from the push rod 410, and each extending structure 4312 covers one end of the side plate 451 adjacent to the main body 431.

[0086] In addition, the shape of the extension structure 4312 can correspond to the flat state of the side plate 451, and improves the structural stability of the side plate 451 and the isolation cover 430 after injection molding.

[0087] 8 and 9 , a connection structure 433 is provided between the cover case 432 and the adjacent extension structure 4312, and the connection structure 433 is connected to the cover case 432 and the body part 431 and / or the extension structure 4312, and is used to seal the gap between the cover case 432 and the body part 431 and / or the extension structure 4312. Exemplarily, the connection structure 433 is connected to the body part 431, the first plate 4322, and the extension structure 4312.

[0088] On the one hand, the connection structure 433 can improve the structural stability of the cover case 432 with respect to the main body 431. On the other hand, the connection structure 433 can avoid the existence of a gap between the outer wall of the cover case 432 and the extension structure 4312, and ensure that the creeping path is effectively extended. For example, when a current flows from the main body 431 between the cover case 432 and the extension structure 4312, the current needs to flow along the connection structure 433 until it reaches the first plate 4322.

[0089] 8 and 10, an isolation barrier 4311 is provided on one side of the main body 431 facing the push rod 410 along the axial direction of the push rod 410, and the isolation barrier 4311 extends from the surface of the main body 431 in the direction facing the push rod 410. The isolation barrier 4311 is provided on at least one side of the elastic member 440 in FIG. 3 along the radial direction of the push rod 410. The isolation barrier 4311 may be provided on the current creeping path from the elastic member 440 to the auxiliary movable contact 420, thereby increasing the creeping path from the elastic member 440 to the auxiliary movable contact 420 and further the creeping distance.

[0090] Note that "creepage path" refers to the possible creepage path between two metal parts on an insulating surface, and "creepage distance" refers to the minimum creepage path between two conductive parts measured along an insulating surface.

[0091] In addition, in this embodiment, in the plane perpendicular to the Z direction, the isolation barrier 4311 may be a local structure design or a continuous structure, that is, the isolation barrier 4311 may be designed to surround the elastic member 440, so as to effectively isolate the elastic member 440 from the periphery thereof. In addition, the isolation barrier 4311 can further confine the elastic member 440 within the plane perpendicular to the Z direction, so as to improve the stability after the elastic member 440 and the isolation cover 430 are assembled.

[0092] Of course, the body 431 of the isolation cover 430 may further be provided with a limiting structure 4313 as shown in Fig. 10, which further limits the stability of the elastic member 440 after assembly. Illustratively, when the elastic member 440 is a contact spring, the limiting structure 4313 may be a protrusion that extends into the hollow structure of the contact spring to help limit the structural stability of the contact spring.

[0093] In addition, in order to improve the stability of the cover case 432 relative to the body 431, in one specific embodiment, the second plate 4323 and the isolation barrier 4311 may further be provided with a reinforcing structure.

[0094] 16 to 19, in another embodiment, the openings 4321 in the two cover cases 432 are arranged along a diagonal line of the isolation cover 430, and the main body 431 and each cover case 432 respectively form an opening 4321. This structural arrangement can facilitate the punching operation and reduce the difficulty of manufacturing and assembly.

[0095] In particular, the size of the opening 4321 in the direction perpendicular to the axis of the push rod 410 can be set as required. For example, it may be set larger. By setting the size of the opening 4321 to be larger, the isolation cover 430 can be designed to be compact under the premise that the isolation cover 430 meets the safety requirements. In particular, when assembling the isolation cover 430 provided in this embodiment, the auxiliary drawing member 600 is first placed in the internal space of the isolation cover 430 through the opening 4321, and then the isolation cover 430 is rotated in the direction perpendicular to the axis of the push rod 410, so that the isolation cover 430 is attached to a predetermined position.

[0096] Naturally, the size of the opening 4321 cannot be set too large, so as to ensure the structural strength of the cover case 432 and satisfy the isolation requirements.

[0097] As shown in Fig. 16 to Fig. 19, in this embodiment, the number of openings 4321 in the cover case 432 is two, and the other opening 4321 is referred to as the auxiliary opening 4325. Exemplarily, the auxiliary opening 4325 is connected to the main body 431, and the auxiliary openings 4325 in the two cover cases 432 are arranged along a second diagonal line, and the second diagonal line passes through the main body 431 and intersects with the first diagonal line. In a plane perpendicular to the axis of the push rod 410, the openings 4321 in each cover case 432 are spaced apart from the auxiliary openings 4325, and the size of the auxiliary openings 4325 is smaller than that of the openings 4321. The structural design of the auxiliary openings 4325 can further facilitate the stamping operation and reduce the difficulty of manufacturing and assembly.

[0098] 16, in one specific embodiment, the cover case 432 includes a first plate 4322 and a second plate 4323, the first plate 4322 is connected to the main body 431, and the extending direction of the first plate 4322 is perpendicular to the axis of the push rod 410. The second plate 4323 extends from the first plate 4322, and the extending direction of the second plate 4323 is perpendicular to the extending direction of the first plate 4322, and the second plate 4323 is provided with an opening 4321. As shown in FIG. 18, there is a gap between both ends of the second plate 4323 and the main body 431, and the gap forms the opening 4321 and the auxiliary port 4325.

[0099] In addition, since the cover case 432 needs to rotate during the assembly process, the extension state of the second plate body 4323 in a plane perpendicular to the axis of the push rod 410 can be set to an arc shape, thereby saving the space occupied by the cover case 432 and improving the structural performance of the relay 10.

[0100] When assembling each structural member in the push rod assembly 400 provided in the embodiment of the present application, as shown in Figures 17 to 19, the main body 431 is divided into two parts, a first structural member 431a (shown in Figure 17) and a second structural member 431b (shown in Figures 18 and 19), in which the first structural member 431a is formed in a first injection molding operation, and the second structural member 431b is formed in a second injection molding operation. Exemplarily, the shape of the second structural member 431b is as shown in Figures 17 and 18.

[0101] After the first injection molding process, the push rod 410, the auxiliary movable contact 420 and the first structural member 431a form an integral structure. Then, the second structural member 431b is manufactured on the surface of the integral structure. The second structural member 431b covers at least a part of the first structural member 431a to form a complete main body 431, and synchronously forms the cover case 432.

[0102] Of course, the push rod assembly 400 in this embodiment further includes a contact holder 450, which is connected to the isolation cover 430 and follows the movement of the push rod 410. The contact holder 450 may be connected to the push rod 410, the auxiliary movable contact 420 and the isolation cover 430 through an integral injection molding manner, which further improves the integration degree of the push rod assembly 400, optimizes the movement following effect of each structural member, and reduces the difficulty of assembly.

[0103] In addition, as shown in Fig. 15, a contact holder 450 is also provided in the push rod assembly 400 provided in this embodiment. The contact holder 450 may be the same as or different from the structure in Fig. 11 and Fig. 12. In one specific example, as shown in Fig. 15, a side plate 451 and a top plate 453 are an integral structure, and the two side plates 451 and the top plate 453 form a U-shaped structure, a bottom plate 452 is partially covered in the body part 431, and both ends in the longitudinal direction of the bottom plate 452 extend from the body part 431. The contact holder 450 includes a top plate 453 and two side plates 451 arranged opposite to each other, and the two side plates 451 and the top plate 453 combine to form a U-shaped structure, and one side of each side plate 451 facing the top plate 453 is fixed to the bottom plate 452. The arrangement direction of the two side plates 451 is perpendicular to the longitudinal direction of the auxiliary movable contact piece 421 .

[0104] In addition, compared with the contact holder 450 in other embodiments, the contact holder 450 in this specific embodiment has an inverted U-shape, and the bottom plate 452 is fixed in the isolation cover 430 and connected to the contact holder 450. Specifically, each end of the bottom plate 452 extending from the body 431 is connected to the corresponding side plate 451, which improves the stability of the structure.

[0105] 2 and 20, the relay 10 provided by the embodiment of the present invention further includes an auxiliary pull-out member 600, in which the push rod 410 and the auxiliary pull-out member 600 penetrate the yoke plate 100, and an auxiliary fixed contact corresponding to the auxiliary movable contact 422 is provided on one side of the auxiliary pull-out member 600 facing the auxiliary movable contactor 420 of the yoke plate 100. The auxiliary pull-out member 600 is used to contact or separate the auxiliary movable contactor 420, thereby monitoring and controlling the on / off state between the movable contact 311 and the fixed contact 322.

[0106] In one embodiment, the relationship between the auxiliary pull-out member 600 and the corresponding auxiliary movable contact 422 may be in a normally open state.

[0107] 2, in the process of moving the main moving contactor 310, the auxiliary moving contactor 420 moves along with the main moving contactor 310. When the moving contact 311 in the main moving contactor 310 comes into contact with the fixed contact 322, the auxiliary moving contact 422 in the auxiliary moving contactor 420 comes into contact with the auxiliary fixed contact. Conversely, when the moving contact 311 in the main moving contactor 310 comes out of the fixed contact 322, the auxiliary moving contact 422 in the auxiliary moving contactor 420 comes out of the auxiliary fixed contact.

[0108] The contact and separation between the auxiliary movable contact 422 and the auxiliary fixed contact will be further explained. At the moment when both ends of the auxiliary movable contactor 420 move and join with the auxiliary fixed contacts, respectively, the auxiliary fixed contacts in the detection circuit are conductive, thereby detecting the conduction of the main contacts (i.e., the movable contact 311 and the fixed contact 322). Conversely, when the high voltage DC relay 10 is controlled to stop the current flow to the coil, the movable core moves in the opposite direction to the attraction due to the elasticity of the reset spring, and at the same time, the auxiliary movable contactor 420 moves in the direction away from the auxiliary fixed contact with the reset of the movable core, and at the moment when both ends of the auxiliary movable contactor 420 separate from the auxiliary fixed contact, the detection circuit of the high voltage DC relay 10 is disconnected, thereby detecting the separation of the main contacts (i.e., the movable contact 311 and the fixed contact 322).

[0109] The auxiliary drawing member 600 and the yoke plate 100 are connected by a connection assembly 700 shown in Fig. 2 and Fig. 20 to Fig. 22. Exemplarily, as shown in Fig. 2 to Fig. 5, the yoke plate 100 is provided with a through-hole structure, and the connection assembly 700 is disposed in the through-hole structure to fix the auxiliary drawing member 600. Specifically, at the position where the auxiliary drawing member 600 penetrates the yoke plate 100, a ceramic member 710 is surrounded and fixed on the periphery of the auxiliary drawing member 600, and a transition piece 720 is covered on the outside of the ceramic member 710, and the transition piece 720 forms a convex hull structure on one side facing the magnetic circuit assembly 500. The convex hull structure extends from the side edge of the ceramic member 710 approaching the magnetic circuit assembly 500 in the direction facing the magnetic circuit assembly 500, and covers at least a part of the surface of one side facing the magnetic circuit assembly 500 of the ceramic member 710. 3 to 5, the convex hull structure has a through hole at the through position of the auxiliary drawer member 600, and the edge forming the through hole of the transition piece 720 is folded back in the direction approaching the ceramic member 710 and abuts against the ceramic member 710. The material of the transition piece 720 may be metal.

[0110] Blade welding technology can be used to fasten the ceramic member 710 and the transition piece 720, which can reduce the welding stress and improve the sealing performance. Note that the transition piece 720 only has one small flange in contact with the ceramic member 710, so the welding area between the transition piece 720 and the ceramic member 710 can be reduced, which can reduce the welding stress and improve the sealing performance.

[0111] An embodiment of the present invention further provides a manufacturing method for the push rod assembly 400. The manufacturing method uses an injection molding process to connect the push rod 410 and the auxiliary moving contact 420, and form an isolation cover 430, which covers the auxiliary moving contact 422 of the auxiliary moving contact 420.

[0112] In addition, in this embodiment, the push rod 410, the isolation cover 430 and the auxiliary movable contact 420 are integrally formed in a single manufacturing process, which is simple to operate, improves the operating efficiency and reduces the manufacturing cost.

[0113] Of course, the manufacturing method of the push rod assembly 400 can be used to manufacture the push rod assembly 400 provided by any of the above technical solutions.

[0114] An embodiment of the present invention further provides a method for manufacturing the push rod assembly 400. With reference to Figures 1 to 22 and the structure shown in Figure 23, the method for manufacturing the push rod assembly 400 includes:

[0115] Step S2302: By an injection molding process, a first structural member 431a is formed at a predetermined position of the push rod 410 and the auxiliary movable contact 420, and the push rod 410 and the auxiliary movable contact 420 are connected through the first structural member 431a, as shown in FIG.

[0116] Step S2304: Again, by injection molding process, manufacture a second structural member 431b on the surface of the first structural member 431a to form an isolation cover 430. As shown in Figures 8 and 9, here, the isolation cover 430 is used to cover the auxiliary moving contact 422 of the auxiliary moving contactor 420 and isolate the auxiliary moving contact 422 from the main moving contactor 310. And the isolation cover 430 is used to extend the creepage distance from the main moving contactor 310 to the auxiliary moving contactor 420.

[0117] Furthermore, the manufacturing method of the push rod assembly 400 provided by the embodiment of the present application can reduce manufacturing difficulty, improve manufacturing efficiency, and improve the structural performance of the product.

[0118] When applying the manufacturing method of the push rod assembly 400 provided by the embodiment of the present invention, there is no need to provide a positioning hole for drilling a mold in the isolation cover 430, and there is no need to use a mold core to position the auxiliary moving contact 421. The push rod assembly 400 manufactured using the manufacturing method provided by the embodiment of the present invention can extend the creepage distance from the main moving contact 310 to the auxiliary moving contact 420, thereby improving the insulation level of the relay 10 and improving the structural performance and safety characteristics of the relay 10. Moreover, the increased creepage distance between the auxiliary moving contact 421 and the main moving contact 310 allows the push rod assembly 400 to be applied to a higher voltage environment, thereby expanding the application scenario.

[0119] Furthermore, the push rod assembly 400 manufactured using the manufacturing method provided by the embodiment of the present invention has an isolation cover 430 covering the auxiliary moving contact 422, thereby isolating the auxiliary moving contact 422 from the main moving contactor 310, and isolating the moving contact 311 in the main moving contactor 310 and the auxiliary moving contact 422 in the auxiliary moving contactor 420 on both sides of the isolation cover 430 along the axial direction of the push rod 410. Thus, when the moving contact 311 and the fixed contact 322 are separated and an arc occurs, the isolation cover 430 can provide isolation protection for the auxiliary moving contact 422, and prevent the auxiliary moving contact 422 from being contaminated by the arc.

[0120] In addition, in the manufacturing method provided by the embodiment of the present invention, the isolation cover 430 is connected to the auxiliary movable contact 420 and the push rod 410 so that the isolation cover 430 and the auxiliary movable contact 420 follow the movement of the push rod 410, so that the overall dimensional chain is small, the control precision is high, and the consistency of the movement trajectories of the movable contact 311 and the auxiliary movable contact 422 is ensured. In addition, since the isolation cover 430 obtained by manufacturing follows the movement of the auxiliary movable contact piece 421, there is no need to reserve a moving space for the auxiliary movable contact 420 in advance, the structure is compact, and the number of parts is simplified, the cost is reduced, the assembly process is reduced, and the risk of non-conductivity caused by shavings is avoided.

[0121] In an embodiment, the manufacturing method for performing step S2302 and forming the first structural member 431a at the predetermined position of the push rod 410 and the auxiliary movable contact 420 by an injection molding process further includes:

[0122] A contact holder 450 is provided.

[0123] The first structural member 431a is formed at a predetermined position on one axial end of the push rod 410, the auxiliary movable contact 420, and the contact holder 450 by an injection molding process.

[0124] In addition, the structural installation in this embodiment can further improve the integration density of the push rod assembly 400, further optimize the operational tracking effect of each structural component, reduce the difficulty of assembly, and simplify the number of structural components.

[0125] Finally, it should be noted that the examples / embodiments provided by the present invention can be combined with each other as long as no contradiction occurs, and thus they will not be described one by one here.

[0126] In the embodiments of the invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood to indicate or imply relative importance. The term "plurality" refers to two or more than two, unless otherwise limited. The terms "attached", "coupled", "connected", "fixed", and the like should all be understood in a broad sense, for example, "connected" may be a fixed connection, a detachable connection, or an integral connection. "Connected" may be a direct connection, or an indirect connection via an intermediate medium. Those skilled in the art can understand the specific meanings of the above terms in the embodiments of the invention according to the specific circumstances.

[0127] In describing the embodiments of the invention, it should be understood that the orientations or positional relationships indicated by the terms "up", "down", "left", "right", "front", "rear", etc. are based on the orientations or positional relationships shown in the drawings, and are merely intended to facilitate and simplify the description of the embodiments of the invention, and do not indicate or imply that the devices or units shown necessarily have a particular direction or are configured and operated in a particular orientation, and therefore should not be understood as limiting the embodiments of the invention.

[0128] In the description herein, the terms "one embodiment," "some embodiments," "particular embodiments," and the like mean that the particular features, structures, materials, or characteristics described with reference to the embodiment or example are included in at least one embodiment or example of the present invention. In the present specification, general expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the described physical features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

[0129] The above is merely a preferred embodiment of the present invention, and is not intended to limit the present invention. Those skilled in the art may make various modifications and variations to the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A push rod, an auxiliary movable contact and an isolation cover are included. The auxiliary movable contactor includes an auxiliary movable contact piece and an auxiliary movable contact, The auxiliary movable contact is provided at an end of the auxiliary movable contact piece, The isolation cover is connected to the push rod and the auxiliary movable contact piece, and allows the isolation cover and the auxiliary movable contact to follow the movement of the push rod; A push rod assembly, characterized in that the isolation cover is used to cover the auxiliary movable contact and isolate the auxiliary movable contact and the main movable contact, and the isolation cover is used to extend the creepage distance from the main movable contact to the auxiliary movable contact.

2. A part of the auxiliary movable contact pieces is covered inside a part of the isolation cover, The remaining auxiliary movable contact piece extends from the part of the isolation cover, 2. The push rod assembly according to claim 1, wherein the other portion of the isolation cover covers the remaining portion of the auxiliary movable contact piece extending from the isolation cover and the auxiliary movable contact.

3. The isolation cover includes a main body and a cover case, The main body is connected to the push rod and the auxiliary movable contact piece, 3. The push rod assembly according to claim 2, wherein the cover case is connected to the main body portion, and covers the remaining portion of the auxiliary movable contact piece extending from the main body portion and the auxiliary movable contact.

4. The auxiliary movable contacts are provided at both ends of the auxiliary movable contact piece along the longitudinal direction of the auxiliary movable contact piece, The number of the cover cases is two, 4. The push rod assembly according to claim 3, wherein the two cover cases are arranged on opposite sides of the main body along the longitudinal direction of the auxiliary movable contact piece, and each cover case covers the auxiliary movable contact at the same end of the auxiliary movable contact piece.

5. A first through hole is formed in a central region of the auxiliary movable contact piece along a longitudinal direction of the auxiliary movable contact piece, The body portion covers the central region, 5. The push rod assembly according to claim 4, wherein one axial end of the push rod is inserted into the first through hole, and the one axial end of the push rod is integrally formed within the body portion.

6. 5. The push rod assembly according to claim 4, wherein the cover case has an opening in a direction perpendicular to an axial direction of the push rod.

7. 7. The push rod assembly according to claim 6, wherein each of the cover cases has an opening on one side facing away from the other cover case along a direction in which the two cover cases are arranged.

8. The cover case is Two first plates, the two first plates being disposed opposite each other, and the arrangement direction of the two first plates being perpendicular to the axial direction of the push rod and perpendicular to the longitudinal direction of the auxiliary movable contact piece; a second plate body, the second plate body being connected to one end of each of the first plates toward the main body portion along a longitudinal direction of the auxiliary movable contact piece; 8. The push rod assembly of claim 7, further comprising: a top plate, the top plate being connected to the two first plates and the second plate to form a chamber for accommodating the auxiliary movable contact, and the top plate and the two first plates forming the opening on one side facing away from the body portion.

9. 7. The push rod assembly according to claim 6, wherein the openings in the two cover cases are arranged along a diagonal line of the isolation cover, and the main body portion forms the openings in combination with each of the cover cases.

10. The cover case includes a first plate and a second plate, the first plate is connected to the main body, and an extending direction of the first plate is perpendicular to an axial line of the push rod; 10. The push rod assembly of claim 9, wherein the second plate extends from the first plate, the extension direction of the second plate is perpendicular to the extension direction of the first plate, and the opening is provided in the second plate.

11. The push rod assembly further includes a contact holder. The push rod assembly according to any one of claims 3 to 10, characterized in that the contact holder is connected to the isolation cover, and the contact holder follows the movement of the push rod.

12. The push rod assembly according to claim 11, wherein the contact holder is connected to the push rod, the auxiliary movable contact and the isolation cover by an integral injection molding manner.

13. The contact holder includes a bottom plate, a top plate, and two side plates disposed opposite to each other; 12. The push rod assembly according to claim 11, wherein the two side plates are located on the same side of the bottom plate along the axial direction of the push rod, and the top plate is connected to the other ends of the two side plates facing away from the bottom plate.

14. The isolation cover further includes two extension structures; The two extension structures extend from opposite sides of the main body along an arrangement direction of the two side plates, 14. The push rod assembly of claim 13, wherein each of the extension structures extends in a direction opposite to the push rod, and each of the extension structures covers one end of the side plate adjacent to the body portion.

15. a connection structure is provided between the cover case and the adjacent extension structure; the connection structure is connected to the cover case and the main body and / or the extension structure; The push rod assembly according to claim 14, which is used to seal a gap between the cover case and the main body and / or extension structure.

16. The push rod assembly according to any one of claims 3 to 10, wherein an elastic member is attached to one side of the isolation cover facing away from the push rod along the axial direction of the push rod.

17. An isolation barrier is provided on one side of the body portion facing away from the push rod along the axial direction of the push rod, 17. The push rod assembly of claim 16, wherein the isolation barrier extends from a surface of the body portion in a direction away from the push rod, and the isolation barrier is provided on at least one side of the elastic member along a radial direction of the push rod.

18. The push rod assembly according to any one of claims 1 to 10, characterized in that the isolation cover is connected to the push rod and the auxiliary movable contact by an integral injection molding manner.

19. A relay comprising a push rod assembly according to any one of claims 1 to 18.

20. Further comprising a yoke plate and an auxiliary drawer member, The auxiliary pull-out member and the push rod of the push rod assembly pass through the yoke plate; The relay according to claim 19, wherein the auxiliary lead-out member is provided with an auxiliary fixed contact corresponding to the auxiliary movable contact on one side of the yoke plate facing the auxiliary movable contactor.

21. 1. A method of manufacturing a push rod assembly, comprising: The push rod and the auxiliary movable contact are connected by injection molding, and an isolation cover is formed; The method for manufacturing a push rod assembly, wherein the isolation cover covers an auxiliary movable contact of the auxiliary movable contactor.

22. forming a first structural member at a predetermined position of the push rod and the auxiliary movable contact by an injection molding process, and connecting the push rod and the auxiliary movable contact through the first structural member; and manufacturing a second structural member on the surface of the first structural member, again by an injection molding process, to form an isolation cover; A method for manufacturing a push rod assembly, characterized in that the isolation cover is used to cover the auxiliary movable contact of the auxiliary movable contactor and isolate the auxiliary movable contact from the main movable contactor, and the isolation cover is used to extend the creepage distance from the main movable contactor to the auxiliary movable contactor.

23. A manufacturing method for forming a first structural member at a predetermined position of the push rod and the auxiliary movable contact by an injection molding process includes the following steps: Providing a contact holder; 23. The method for manufacturing a push rod assembly according to claim 22, further comprising the step of forming the first structural member at a predetermined position of one axial end of the push rod, the auxiliary movable contact and the contact holder by an injection molding process.

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