relay

Abstract

To provide a relay for achieving both the short-circuit resistance capacity and ultimate breaking capacity.SOLUTION: A contact container has a contact chamber and a pair of first through holes. The first through holes are communicated with the contact chamber. A pair of stationary contact lead-out ends are pierced in the pair of first through holes, respectively. A movable body is movable relative to the contact container. A first magnetically permeable body is provided in the contact chamber and includes a plurality of laminated magnetically permeable pieces. The plurality of magnetically permeable pieces are connected to the movable body. A movable member is movably provided in the contact chamber. The movable member includes a movable contactor. The movable contactor is to be brought into contact with or separated from the pair of stationary contact lead-out ends. The first magnetically permeable body is provided on a side of the movable contactor directed to the stationary contact lead-out ends. The first magnetically permeable body is movable relative to the movable member via the movable body, and adjusts the distance between the first magnetically permeable body and the movable member according to the magnitude of the value of current flowing in the movable member.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] FIELD OF THE INVENTION Embodiments of the present invention relate to the technical field of electronic control devices, and in particular to relays. [Background technology]

[0002] A relay is an electronic control device that has a control system (also called input circuit) and a controlled system (also called output circuit), and is usually applied in automatic control circuits. A relay is actually an "automatic switch" that controls a large current with a small current. Therefore, in the circuit, it plays roles such as automatic adjustment, safety protection, and conversion circuit.

[0003] High-voltage DC relays are a type of relay. To address the problem of contacts of high-voltage DC relays being flipped off due to the electromotive repulsive force generated by short-circuit current, related technologies commonly employ a short-circuit-resistant ring electromagnetic structure. Depending on the location of the upper magnetic body in the short-circuit-resistant ring, they can be further divided into a following structure and a fixed structure. Specifically, a following structure refers to an upper magnetic body located on the movable assembly of the relay, while a fixed structure refers to an upper magnetic body located in a fixed position other than the movable assembly. However, while the fixed structure significantly enhances short-circuit resistance, its interrupting capability is negatively correlated with its short-circuit resistance, resulting in a decrease in interrupting capability. On the other hand, a following short-circuit-resistant structure is affected by the retaining force of the movable core. Therefore, a large short-circuit current may cause the core to separate, resulting in the contacts being disconnected. Increasing the retaining force of the movable core requires a larger coil, which contradicts the goal of reducing volume and weight. Summary of the Invention

[0004] Embodiments of the present invention provide a relay that combines short-circuit withstanding capability and limit breaking capability.

[0005] A relay according to an embodiment of the present invention includes: a contact vessel having a contact chamber and a pair of first through holes; a pair of fixed contact lead-out ends respectively provided in the pair of first through holes; a movable body movable relative to the contact container; a first magnetic conductive body provided in the contact chamber and including a plurality of stacked magnetic conductive pieces; a movable member movably disposed within the contact chamber and including a movable contact; the first through-hole communicates with the contact chamber; The plurality of magnetic conductive pieces are connected to the moving body, the movable contactor is for contacting or separating from a pair of fixed contact lead-out ends, and the first magnetic conductive body is provided on the side of the movable contactor facing the fixed contact lead-out ends; The first magnetic conductive body is movable relative to the movable member via the moving body, and is used to adjust the distance between the first magnetic conductive body and the movable member depending on the magnitude of the current flowing through the movable member.

[0006] According to some embodiments of the present invention, the first magnetic body is moved between a first position and a second position via a moving body; In the first position, the distance between the first magnetic conductive body and the movable member is a first interval, and in the second position, the distance between the first magnetic conductive body and the movable member is a second interval, the first interval being greater than the second interval.

[0007] According to some embodiments of the present invention, in the second position, the second spacing between the first magnetic conductive body and the movable member is equal to zero.

[0008] According to some embodiments of the present invention, the first magnetic conductive body is located at the first position, and the value of the current flowing through the movable contact is equal to or less than a threshold current; When the value of the current flowing through the movable contact is greater than the threshold current, the first magnetic conductive body moves from the first position to the second position.

[0009] According to some embodiments of the present invention, the relay further includes a fixed member fixedly provided within the contact receptacle, and the moving body is movably attached to the fixed member.

[0010] According to some embodiments of the present invention, the relay further includes a first elastic body for applying an elastic force to the moving body so that the first magnetic conductive body has a tendency to move in a direction away from the movable member.

[0011] According to some embodiments of the present invention, the fixed member has a first side facing the movable member and a second side opposite the first side, the first elastic body is provided on the second side, the first magnetic conductive body and the movable member are provided on the first side, and the first magnetic conductive body is provided between the first elastic body and the movable member; One end of the moving body is connected to the first elastic body, and the other end is connected to the first magnetic conductive body.

[0012] According to some embodiments of the present invention, the fixing member has a first perforation extending through the first side surface and the second side surface; The movable body is rod-shaped and movably provided in the first hole. According to some embodiments of the present invention, the first elastic body has second perforations corresponding to the first perforations; The movable body is provided in the first hole and the second hole.

[0013] According to some embodiments of the present invention, the movable body includes a rod body and a pressing cap provided at one end of the rod body, the pressing cap being pressed against the peripheral edge of the second bore on the side facing away from the first magnetic conductive body.

[0014] According to some embodiments of the present invention, each of the magnetic conductive pieces is provided with a third perforation corresponding to the positions of the first perforation and the second perforation, and the rod body is perforated with the second perforation, the first perforation and the third perforation in sequence; A step structure is provided on the outer periphery of the rod body, and one end of the rod body facing the movable member is fixedly connected to one of the plurality of magnetic conductive pieces that is closest to the movable member, and the step structure abuts against the peripheral edge of the third perforation of one of the plurality of magnetic conductive pieces that is farthest from the movable member, on the side facing the first elastic body.

[0015] According to some embodiments of the present invention, the first magnetic conductive body is moved between a first position and a second position via a moving body, and at the first position, a distance between the first magnetic conductive body and the moving body is a first interval, and at the second position, a distance between the first magnetic conductive body and the moving body is a second interval, the first interval being greater than the second interval; In the first position, one of the multiple magnetic pieces that is farthest from the movable member abuts against the surface on the first side, and one end of the movable body presses against the first elastic body so that the first elastic body has an elastic preload force.

[0016] According to some embodiments of the present invention, the plurality of magnetic conductive pieces and the first elastic body are both disposed between the pair of fixed contact lead-out ends.

[0017] According to some embodiments of the present invention, the first elastic body includes a reed or a spring.

[0018] According to some embodiments of the present invention, the contact vessel comprises: A yoke board and an insulating cover that covers a side surface of the yoke plate facing the fixed contact lead-out end, The insulating cover and the yoke plate are enclosed as a contact chamber, and a pair of first through holes are opened in the insulating cover; The fixing member is connected to the insulating cover or the yoke plate.

[0019] According to some embodiments of the present invention, the direction of movement of the first magnetic conductive body relative to the movable member is along the direction of contact / separation between the movable contact and the fixed contact lead end.

[0020] According to some embodiments of the present invention, the moving body is movably provided on the side of the movable member facing the fixed contact pull-out ends, and the moving body is located between the pair of fixed contact pull-out ends.

[0021] According to some embodiments of the present invention, the moving body is made of a metallic material.

[0022] According to some embodiments of the present invention, the movable member further includes a second magnetic conductive body; The second magnetic conductive body is fixedly connected to the side of the movable contactor facing away from the first magnetic conductive body, and the second magnetic conductive body forms a magnetic circuit together with the first magnetic conductive body.

[0023] One embodiment of the above invention has at least the following advantages or beneficial effects.

[0024] According to the relay of the embodiment of the present invention, the first magnetic conductive body is movable relative to the movable member via the moving body, and the magnitude of the magnetic attraction force generated between the first magnetic conductive body and the movable member can be adjusted according to the magnitude of the current flowing through the movable contact, thereby satisfying not only the short-circuit resistance requirements but also the overload interruption requirements.

[0025] The first magnetic conductive body includes multiple laminated magnetic conductive pieces, and the magnetic conductive pieces are relatively thin and can be made from thin strips of material, which reduces material costs and makes handling easy. On the other hand, the number of magnetic conductive pieces can be flexibly adjusted according to the magnitude of the short-circuit current, and the thickness of the first magnetic conductive body can be increased or decreased. [Brief explanation of the drawings]

[0026] [Figure 1] FIG. 1 is an exploded schematic view of a relay according to a first embodiment of the present invention. [Figure 2] 1 is a perspective schematic diagram of a relay according to a first embodiment of the present invention, in which a housing, an electromagnet unit, and an arc-extinguishing unit are omitted. [Figure 3] 1 is a schematic plan view of a relay according to a first embodiment of the present invention, in which a housing, an electromagnet unit, and an arc-extinguishing unit are omitted. [Figure 4] FIG. 3 is a schematic diagram of the exploded view of FIG. 2. [Figure 5] 4 is a cross-sectional view taken along line AA of FIG. 3, in which the first magnetic conductive body is located at a first position. [Figure 6]FIG. 4 is a cross-sectional view taken along line BB of FIG. 3, in which the first magnetic conductive body is located at a first position. [Figure 7] FIG. 7 is a partial enlarged view of the X1 portion of FIG. 6. [Figure 8] 4 is a cross-sectional view taken along line AA of FIG. 3, in which the first magnetic conductive body is located in a second position. [Figure 9] FIG. 4 is a cross-sectional view taken along line BB of FIG. 3, in which the first magnetic conductive body is in a second position. [Figure 10] FIG. 10 is a partial enlarged view of the X2 portion of FIG. 9. [Figure 11] 10 is a schematic perspective view of a relay according to a second embodiment of the present invention, in which the housing, the electromagnet unit, and the arc-extinguishing unit are omitted. [Figure 12] 10 is a schematic plan view of a relay according to a second embodiment of the present invention, in which the housing, the electromagnet unit, and the arc-extinguishing unit are omitted. [Figure 13] FIG. 12 is a schematic diagram of the exploded view of FIG. 11. [Figure 14] FIG. 10 is a schematic perspective view of the fixing member attached to the yoke plate. [Figure 15] 13 is a cross-sectional view taken along CC in FIG. 12, where the first magnetic conductive body is in the first position. [Figure 16] 13 is a cross-sectional view taken along CC in FIG. 12, where the first magnetic conductive body is in a second position. [Figure 17] 10 is a schematic perspective view of a relay according to a third embodiment of the present invention, in which the housing, the electromagnet unit, and the arc-extinguishing unit are omitted. FIG. [Figure 18] 10 is a schematic plan view of a relay according to a third embodiment of the present invention, in which the housing, the electromagnet unit, and the arc-extinguishing unit are omitted. [Figure 19] FIG. 18 is a schematic diagram of the exploded view of FIG. 17. [Figure 20] FIG. 19 is a cross-sectional view taken along line DD in FIG. 18, in which the first magnetic conductive body is located at a first position. [Figure 21] 2 is a schematic diagram of a first magnetic conductive body, a first elastic body, and a moving body after assembly according to an embodiment of the present invention. FIG. [Figure 22]FIG. 22 is a schematic diagram of the exploded view of FIG. 21. [Figure 23] FIG. 10 is a schematic diagram of a first magnetic conductive body, a first elastic body, and a moving body after assembly according to another embodiment of the present invention. [Figure 24] FIG. 24 is a schematic diagram of the exploded view of FIG. 23. [Figure 25] FIG. 10 is an exploded schematic view of a relay according to a fourth embodiment of the present invention. [Figure 26] FIG. 10 is an exploded schematic view of a relay according to a fifth embodiment of the present invention. [Figure 27] FIG. 10 is an exploded schematic view of a relay according to a sixth embodiment of the present invention. [Explanation of symbols]

[0027] 10, contact vessel, 101, contact chamber, 102, first through hole, 103, third through hole, 11a, insulating cover, 11, ceramic cover, 12, flange member, 13, yoke plate, 131, second through hole, 20, fixed contact lead end, 30, accommodating space, 40, first magnetic conductive body, 410, magnetic conductive piece, 420, third perforation, 50, push rod assembly, 51, push rod, 52, base, 53, movable member, 54, movable contact, 55, second magnetic conductive body, 56, second elastic body, 57, slide structure, 571, limit portion, 572, limit hole, 60, fixing member, 610, connecting body, 611, insertion portion, 612, flange, 620, fixing body, 621, first side, 622, second side, 623, first perforation, 70, first elastic body, 701, avoidance notch, 710, elastic lead, 11, second perforation, 720, spring, 730, pressing piece, 80, moving body, 810, pressing cap, 820, rod body, 821, step structure, 1100, housing, 1110, first case, 1120, second case, 1130, exposure hole, 1200, electromagnet unit, 1210, coil bobbin, 1220, coil, 1230, fixed iron core, 1231, through hole, 1240, movable iron core, 1250, reset member, 1300, arc-extinguishing unit, 1310, arc-extinguishing magnet, 1320, yoke clamp, 1400, seal unit, 1410, metal cover, P1, first position, P2, second position. DETAILED DESCRIPTION OF THE INVENTION

[0028] Next, exemplary embodiments will be described in more detail with reference to the drawings. However, the exemplary embodiments may be implemented in various forms and should not be understood as being limited to the embodiments described herein. On the contrary, these embodiments are provided so that the present invention will be comprehensive and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. Since the same reference numerals in the drawings represent the same or similar structures, detailed descriptions will be omitted.

[0029] 1 , a relay according to an embodiment of the present invention includes a housing 1100, an electromagnet unit 1200, an arc-extinguishing unit 1300, and a seal unit 1400. The seal unit 1400 is disposed within the housing 1100, and the top of the fixed contact lead-out end of the seal unit 1400 is exposed to the outer surface of the housing 1100 through an exposure hole 1130 in the housing 1100. The electromagnet unit 1200 and the arc-extinguishing unit 1300 are both disposed within the housing 1100.

[0030] It is to be understood 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 device comprising a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units not listed, or optionally includes other steps or components inherent to those processes, methods, products, or devices.

[0031] As an example, the housing 1100 includes a first case 1110 and a second case 1120, which are engaged and connected to form a chamber for accommodating the electromagnet unit 1200, the arc-extinguishing unit 1300, and the seal unit 1400.

[0032] The arc-extinguishing unit 1300 is used to extinguish an arc that occurs between the fixed contact lead-out end of the seal unit 1400 and the movable contact.

[0033] As an example, the arc-extinguishing unit 1300 includes two arc-extinguishing magnets 1310. The arc-extinguishing magnets 1310 may be permanent magnets, and each arc-extinguishing magnet 1310 may be substantially rectangular. The two arc-extinguishing magnets 1310 are provided on both sides of the seal unit 1400, facing each other along the longitudinal direction of the movable contact.

[0034] By providing two opposing arc-extinguishing magnets 1310, a magnetic field can be formed around the fixed contact pull-out end and the movable contactor, so that the arc generated between the fixed contact pull-out end and the movable contactor is stretched away from each other by the action of the magnetic field, thereby realizing arc extinction.

[0035] The arc-extinguishing unit 1300 further includes two yoke clamps 1320 disposed corresponding to the positions of the two arc-extinguishing magnets 1310. The two yoke clamps 1320 surround the seal unit 1400 and the two arc-extinguishing magnets 1310. The design in which the yoke clamps 1320 surround the arc-extinguishing magnets 1310 prevents the magnetic field generated by the arc-extinguishing magnets 1310 from diffusing to the outside and affecting the arc-extinguishing effect. The yoke clamps 1320 are made of a soft magnetic material. Examples of soft magnetic materials include, but are not limited to, iron, cobalt, nickel, and alloys thereof.

[0036] As shown in Figures 2 to 4, a seal unit 1400 according to an embodiment of the present invention includes a contact container 10, a pair of fixed contact pull-out ends 20, a push rod assembly 50, a first magnetic conductive body 40, a movable body 80, a fixed member 60, and a first elastic body 70.

[0037] The contact container 10 is a stationary member for housing the contact assembly, and is a device having a chamber with a case as its main component. The contact container 10 may also be a device in which multiple components are connected in a predetermined assembly method.

[0038] The contact vessel 10 has a contact chamber 101 inside. The contact vessel 10 can include an insulating cover 11a and a yoke plate 13, where the insulating cover 11a covers one side of the yoke plate 13, and the insulating cover 11a and the yoke plate 13 are enclosed together as the contact chamber 101.

[0039] The insulating cover 11a includes a ceramic cover 11 and a flange member 12. The ceramic cover 11 is connected to the yoke plate 13 via the flange member 12. The flange member 12 may be a metal part having an annular structure made of an iron-nickel alloy or the like, and one end of the flange member 12 is connected to the edge of the opening of the ceramic cover 11 by laser welding, brazing, resistance welding, adhesive bonding, or the like. The other end of the flange member 12 may also be connected to the yoke plate 13 by laser welding, brazing, resistance welding, adhesive bonding, or the like. The flange member 12 is provided between the ceramic cover 11 and the yoke plate 13, making it easy to connect the ceramic cover 11 and the yoke plate 13.

[0040] The contact vessel 10 further has a pair of first through holes 102, which are connected to the contact chamber 101. The first through holes 102 are used to drill the fixed contact lead-out ends 20. In this embodiment of the present invention, the first through holes 102 are opened in the ceramic cover 11.

[0041] The pair of fixed contact lead-out ends 20 are connected to the ceramic cover 11 of the contact container 10, and at least a portion of each fixed contact lead-out end 20 is located within the contact chamber 101. One of the pair of fixed contact lead-out ends 20 functions as a current inflow terminal, and the other functions as a current outflow terminal.

[0042] The pair of fixed contact lead-out ends 20 are drilled in the pair of first through holes 102 one-to-one, and are connected to the ceramic cover 11 by, for example, welding.

[0043] The bottom of the fixed contact lead-out end 20 serves as the fixed contact, and the fixed contact may be provided integrally with or separately from the bottom of the fixed contact lead-out end 20 .

[0044] 4, the push rod assembly 50 is connected to the contact container 10 so as to be movable along the axial direction of the rod. The push rod assembly 50 may include a push rod 51, a base 52, a movable member 53, and a second elastic body 56.

[0045] The yoke plate 13 has a second through hole 131, which penetrates two opposing side edges of the yoke plate 13 along the thickness direction of the yoke plate 13 and communicates with the contact chamber 101 of the contact vessel 10. The push rod 51 is drilled in the second through hole 131 so as to be movable along the axial direction. A base 52 is provided at one axial end of the push rod 51, and at least a portion of the base 52 is located within the contact chamber 101.

[0046] The movable member 53 is connected to the base 52 so as to be movable along the axial direction of the push rod 51. The movable member 53 includes a movable contact 54, both ends of which come into contact with the bottoms of the pair of fixed contact pull-out ends 20 to close the contacts. The movable contact 54 includes a movable contact piece and movable contacts provided on both longitudinal ends of the movable contact piece. The movable contacts may protrude beyond the movable contact piece or may be flush with the movable contact piece.

[0047] The movable contacts may be provided integrally or separately at both ends of the movable contact piece.

[0048] The second elastic body 56 is connected to the movable member 53 and the base 52 and is used to provide the movable member 53 with an elastic force to move it toward the fixed contact pull-out end 20 . The push rod assembly 50 further includes a slide structure 57 that is connected to the base 52 and the movable member 53, and the movable member 53 is slidable relative to the base 52 via the slide structure 57. The slide structure 57 includes a limit hole 572 and a limit portion 571 that fit together. The limit portion 571 slidably enters the limit hole 572.

[0049] In the embodiment of the present invention, the base 52 is directly connected to the movable member 53 via the slide structure 57, which simplifies the assembly between the base 52 and the movable member 53. Furthermore, since there is no other member between the movable member 53 and the first magnetic conductive body 40, movement interference between the other member and the first magnetic conductive body 40 during overtravel is avoided.

[0050] The limit hole 572 may be a through hole or a blind hole.

[0051] As an example, the base 52 is provided with a limit hole 572, and the movable member 53 is provided with a limit portion 571.

[0052] Of course, in other embodiments, the push rod assembly 50 may have other configurations, which will not be listed here.

[0053] 4 to 6, the seal unit 1400 further includes a metal cover 1410, which is connected to the side of the yoke plate 13 facing away from the insulating cover 11a, and which covers the second through-hole 131 on the yoke plate 13. The metal cover 1410 and the yoke plate 13 are enclosed as a chamber for accommodating the fixed iron core 1230 and the movable iron core 1240 of the electromagnet unit 1200.

[0054] The electromagnet unit 1200 includes a coil bobbin 1210, a coil 1220, a fixed core 1230, a movable core 1240, and a reset member 1250. The coil bobbin 1210 is hollow and made of an insulating material. A metal cover 1410 is provided inside the coil bobbin 1210. The coil 1220 surrounds the coil bobbin 1210. The fixed core 1230 is fixedly provided inside the metal cover 1410, and a portion of the fixed core 1230 enters the second through-hole 131. The fixed core 1230 has a through-hole 1231, which is provided at a position corresponding to the second through-hole 131 and is used to insert the push rod 51. The movable iron core 1240 is movably provided within the metal cover 1410 and is provided opposite the fixed iron core 1230. The movable iron core 1240 is connected to the push rod 51 and is attracted to the fixed iron core 1230 when the coil 1220 is energized. The movable iron core 1240 and the push rod 51 can be connected by screwing, caulking, welding, or other methods.

[0055] The reset member 1250 is located inside the metal cover 1410 and is provided between the fixed iron core 1230 and the movable iron core 1240, and is used to reset the movable iron core 1240 when the power supply to the coil 1220 is cut off. The reset member 1250 may be a spring, and may be fitted onto the outside of the push rod 51.

[0056] When the coil 1220 is energized, the electromagnet unit 1200 can drive the push rod assembly 50 to move upward via the push rod 51. When the movable member 53 comes into contact with the fixed contact pull-out end 20, the movable member 53 is stopped by the fixed contact pull-out end 20, but the push rod 51 and the base 52 continue to move upward until they finish overtraveling.

[0057] 4 to 6, the first magnetic conductive body 40 is provided in the contact chamber 101, and is provided on the side of the movable member 53 facing the fixed contact pull-out end 20. The fixed member 60 is fixedly provided in the contact container 10. The moving body 80 is movably attached to the fixed member 60. The first magnetic conductive body 40 is connected to the moving body 80, and is movable relative to the movable member 53 via the moving body 80.

[0058] The first magnetic conductive body 40 can be made of materials such as iron, cobalt, nickel, and alloys thereof.

[0059] In one embodiment, the first magnetic conductive body 40 may be, but is not limited to, a straight or U-shaped body.

[0060] When both ends of the movable contact 54 contact the pair of fixed contact pull-out ends 20, a current passes through the movable contact 54, forming a magnetic circuit surrounding the movable contact 54 on the longitudinal periphery of the movable contact 54. Due to the presence of the first magnetic conductive body 40, most of the magnetic field of the magnetic circuit is concentrated in the first magnetic conductive body 40, magnetizing it. In this way, a magnetic attractive force along the pressure direction of the contacts is generated between the first magnetic conductive body 40 and the movable contact 54 through which current flows. This magnetic attractive force can resist the electromotive repulsive force caused by the short-circuit current between the movable contact 54 and the fixed contact pull-out ends 20, ensuring that the movable contact 54 and the fixed contact pull-out ends 20 do not bounce off each other.

[0061] As described above, a magnetic attraction force is generated between the first magnetic conductive body 40 and the movable contact 54 through which current flows, in the pressure direction of the contact. This magnetic attraction force can resist the electromotive repulsive force caused by the short-circuit current between the movable contact 54 and the fixed contact lead-out end 20, ensuring that the movable contact 54 and the fixed contact lead-out end 20 do not bounce off each other.

[0062] Furthermore, when the value of the current flowing through the movable contactor 54 is constant, the magnitude of the magnetic attraction force generated between the first magnetic conductive body 40 and the movable contactor 54 is inversely proportional to the distance between the first magnetic conductive body 40 and the movable contactor 54, and the smaller the distance, the greater the magnetic attraction force generated.

[0063] In order to resist the electromotive repulsive force caused by the short-circuit current and prevent the movable contact 54 from popping off from the fixed contact pull-out end 20, the gap between the first magnetic conductive body 40 and the movable contact 54 needs to be designed to be small, thereby increasing the magnetic attraction force between the first magnetic conductive body 40 and the movable contact 54.

[0064] In order to facilitate timely disconnection, the distance between the first magnetic conductive body 40 and the movable contact 54 needs to be increased, thereby reducing the magnetic attraction force between the first magnetic conductive body 40 and the movable contact 54 and preventing the magnetic attraction force from being too large and affecting timely disconnection.

[0065] This shows that when the value of the gap between the first magnetic conductive body 40 and the movable contact 54 is constant, it is not possible to achieve both short-circuit resistance and limit breaking capability.

[0066] In an embodiment of the present invention, the first magnetic conductive body 40 is movable relative to the movable contactor 54 via the movable body 80, and further, the distance between the first magnetic conductive body 40 and the movable contactor 54 is adjusted according to the magnitude of the current flowing through the movable contactor 54, thereby achieving both short-circuit resistance and limit breaking capability.

[0067] In some embodiments, the distance between the first magnetic body 40 and the movable contact 54 varies. For example, if the first magnetic body 40 and the movable contact 54 are not parallel to each other, the distance between the first magnetic body 40 and the movable contact 54 varies at different positions. In this case, the distance between the first magnetic body 40 and the movable contact 54 refers to the maximum distance between them.

[0068] As shown in FIGS. 5 to 10 , the first magnetic conductive body 40 can move between a first position P1 and a second position P2 via a moving body 80. At the first position P1, the distance between the first magnetic conductive body 40 and the movable contact 54 is a first gap H1. At the second position P2, the distance between the first magnetic conductive body 40 and the movable contact 54 is a second gap H2, which is larger than the second gap H2. By configuring the first magnetic conductive body 40 to be movable, the gap between the first magnetic conductive body 40 and the movable contact 54 can be adjusted depending on the magnitude of the current flowing through the movable contact 54, and the magnitude of the magnetic attractive force generated between the first magnetic conductive body 40 and the movable contact 54 can be changed, thereby achieving both short-circuit current resistance and critical interruption. As an example, at the second position P2, the second gap H2 between the first magnetic conductive body 40 and the movable contact 54 is equal to zero. That is, at the second position P2, the first magnetic conductive body 40 and the movable contact 54 come into contact with each other. This maximizes the magnetic attraction force between the first magnetic conductive body 40 and the movable contact 54, thereby improving short-circuit resistance.

[0069] Of course, in other embodiments, the second gap H2 between the first magnetic conductive body 40 and the movable contact 54 at the second position P2 may not be equal to zero. That is, at the second position P2, the first magnetic conductive body 40 and the movable contact 54 are not in contact with each other, and a gap exists.

[0070] The first elastic body 70 is used to apply an elastic force to the moving body 80 so that the first magnetic conductive body 40 has a tendency to move in a direction away from the movable contact 54. In the embodiment of the present invention, the first elastic body 70 is used to apply an elastic force to the moving body 80 so that the first magnetic conductive body 40 has a tendency to move to the first position P1.

[0071] Hereinafter, with reference to FIGS. 5 to 10, it will be described how the embodiment of the present invention achieves both short-circuit current resistance and limit interruption.

[0072] As shown in FIGS. 5 to 7 , the relay is operating normally, and the current flowing through the movable contact 54 is equal to or less than a threshold current, e.g., less than 2000 A. Because the current is small, the magnetic attractive force between the first magnetic conductive body 40 and the movable contact 54 is also small, and the magnetic attractive force is smaller than the magnitude of the elastic preload of the first elastic body 70. Thus, the elastic force of the first elastic body 70 offsets the magnetic attractive force between the first magnetic conductive body 40 and the movable contact 54, and the first magnetic conductive body 40 is held at the first position P1. When the first magnetic conductive body 40 is located at the first position P1, the distance between the first magnetic conductive body 40 and the movable contact 54 is a first gap H1. For example, the first gap H1 may be 1.5 mm, but is not limited thereto.

[0073] The magnitude of the threshold current can be adjusted according to different types of relays. For example, if the maximum breaking current of the relay is large, the threshold current can be set large, thereby ensuring that the first magnetic conductive body 40 remains at the first position P1 without moving to the second position P2 when the relay is operating normally.

[0074] 8 to 10 , when the value of the current flowing through the movable contact 54 is greater than the threshold current, for example, when the current is greater than 2000 A, the magnetic attractive force between the first magnetic conductive body 40 and the movable contact 54 is proportional to the magnitude of the current value, and therefore, the larger the current value, the greater the magnetic attractive force between the first magnetic conductive body 40 and the movable contact 54. When the magnetic attractive force is greater than the elastic preload of the first elastic body 70, the first magnetic conductive body 40 is attracted by the magnetic attractive force and moves in a direction approaching the movable contact 54 (i.e., moves from the first position P1 to the second position P2), thereby reducing the gap between the first magnetic conductive body 40 and the movable contact 54. Furthermore, since the size of the magnetic gap is inversely proportional to the magnitude of the magnetic attractive force, the smaller the magnetic gap, the greater the magnetic attractive force. When a short-circuit current (much greater than the threshold current) flows, a large magnetic attractive force is generated between the first magnetic body 40 and the movable contact 54, compressing the first elastic body 70 and moving the first magnetic body 40 to the second position P2. At this time, the distance between the first magnetic body 40 and the movable contact 54 is a second distance H2. The second distance H2 is smaller than the first distance H1, and as the distance becomes smaller, the magnetic attractive force between the first magnetic body 40 and the movable contact 54 becomes larger. Therefore, the first magnetic body 40 can attract the movable contact 54 with this large magnetic attractive force, and this magnetic attractive force resists the electromechanical repulsive force caused by the short-circuit current, ensuring that the movable contact 54 and the fixed contact lead-out end 20 do not repel each other, thereby achieving short-circuit resistance.

[0075] As can be seen from this, in the relay of the embodiment of the present invention, the first magnetic conductive body 40 is movably arranged within the contact container 10 via the movable body 80, so that the distance between the first magnetic conductive body 40 and the movable contact 54 can be adjusted according to the magnitude of the current flowing through the movable contact 54, and the magnitude of the magnetic attraction force generated between the first magnetic conductive body 40 and the movable contact 54 can be changed, thereby not only satisfying the short-circuit resistance requirements but also the overload interruption requirements.

[0076] In addition, as the first magnetic conductive body 40 moves from the first position P1 to the second position P2, the first elastic body 70 is gradually compressed, and the reverse elastic force that the first elastic body 70 applies to the moving body 80 gradually increases. When the value of the current flowing through the movable contact 54 is greater than the threshold current but does not reach the short-circuit current, the gradually increasing reverse elastic force holds the first magnetic conductive body 40 at a position between the first position P1 and the second position P2. When the value of the current flowing through the movable contact 54 reaches the short-circuit current, a magnetic attraction force sufficient to resist the reverse elastic force of the first elastic body 70 is generated between the first magnetic conductive body 40 and the movable contact 54, and the first magnetic conductive body 40 can continue to move to the second position P2. The first elastic body 70 continues to be compressed until the first magnetic conductive body 40 moves to the second position P2.

[0077] 4, 5 and 8, the fixing member 60 includes two connecting bodies 610 and a fixing body 620, one end of each of the two connecting bodies 610 is connected to the contact vessel 10, and the other end of each of the two connecting bodies 610 is connected to the fixing body 620. The fixing body 620 may have a plate-like structure and is arranged parallel to the yoke plate 13.

[0078] The fixed member 60 is connected to the contact vessel 10 via the connector 610, and in this way, the short-circuit resistant magnetic attraction force is transmitted to the contact vessel 10. Since the contact vessel 10 is a stationary member, excessive coil holding force is not required, which further reduces the power consumption of the relay coil and the volume of the relay, and improves the short-circuit resistant capability.

[0079] The fixed body 620 of the fixed member 60 includes a first side 621 facing the yoke plate 13 and a second side 622 provided on the opposite side to the first side 621. The first elastic body 70 is provided on the second side 622, the first magnetic conductive body 40 and the movable contactor 54 are provided on the first side 621, and the first magnetic conductive body 40 is provided between the first elastic body 70 and the movable contactor 54. One end of the movable body 80 is connected to the first elastic body 70, and the other end is connected to the first magnetic conductive body 40. The first magnetic conductive body 40, the first elastic body 70, and the fixed member 60 are all located on the side facing the fixed contact lead-out end 20 of the movable contactor 54.

[0080] When the first magnetic conductive body 40 is located at the first position P1, the first magnetic conductive body 40 abuts against the surface of the first side 621 of the fixed body 620. When the first magnetic conductive body 40 is located at the second position P2, the first magnetic conductive body 40 is separated from the fixed body 620.

[0081] In the embodiment of the present invention, a third through-hole 103 is formed in the top wall of the ceramic cover 11 of the contact vessel 10, and the connector 610 may be columnar and drilled into the third through-hole 103. The connection between one end of the connector 610 and the ceramic cover may be implemented in various ways, such as welding, crimping, screwing, adhesive bonding, etc. The connection between the other end of the connector 610 and the fixing member 620 may be implemented in various ways, such as welding, crimping, screwing, adhesive bonding, etc.

[0082] Furthermore, when the connection method between one end of the connector 610 and the ceramic cover 11 is welding, by welding the connector 610 to the top wall of the ceramic cover 11, it is possible to process a metallized layer only around the periphery of the third through hole 103 on the outer surface of the top wall, without the need to process a metallized layer on the inner surface of the top wall, which makes processing easier and simplifies the processing process.

[0083] The shape of the moving body 80 may have various embodiments, for example, the moving body 80 may be columnar, one end of the moving body 80 and the first elastic body 70 may be connected by welding, caulking, screwing, adhesive, etc., and the other end of the moving body 80 and the first magnetic conductive body 40 may be connected by welding, caulking, screwing, adhesive, etc. As a modified example, the shape of the moving body 80 may be an inverted U-shape, with the top of the inverted U-shaped structure connected to the first elastic body 70 and the two sides of the inverted U-shaped structure connected to both sides of the first magnetic conductive body 40, respectively.

[0084] As an example, the fixed body 620 is suspended from the top wall of the ceramic cover 11 via two connecting bodies 610. At the same time, the number of movable bodies 80 may be, but is not limited to, two. The two connecting bodies 610 may be connected to the inner wall surface of the top wall of the ceramic cover 11 or to the outer wall surface of the top wall of the ceramic cover 11.

[0085] When the movable body 80 is columnar in shape, the fixed body 620 has a first perforation 623 penetrating the surface of the first side 621 and the surface of the second side 622. The movable body 80 is movably disposed in the first perforation 623. At the first position P1, the first magnetic conductive body 40 abuts against the surface of the first side 621 of the fixed body 620, and one end of the movable body 80 presses against the first elastic body 70 so that the first elastic body 70 has an elastic preload force.

[0086] Furthermore, since the first magnetic conductive body 40 and the first elastic body 70 are respectively provided on two opposite side surfaces of the fixed body 620, there are no other members between the first magnetic conductive body 40 and the movable contact 54. In this way, when a large current flows through the movable contact 54, the gap between the first magnetic conductive body 40 and the movable contact 54 can be made as small as possible, and the first magnetic conductive body 40 and the movable contact 54 come into contact with each other, further increasing the magnetic attraction force between the first magnetic conductive body 40 and the movable contact 54 and improving the short-circuit resistance capability. On the other hand, the first elastic body 70 is provided on the second side 622 of the fixed body 620 and is not in direct contact with the first magnetic conductive body 40, so it does not affect the magnetic pole face of the first magnetic conductive body 40. Furthermore, the movable body 80 is movably mounted in the first bore 623 of the fixed body 620, with one end of the movable body 80 pressing against the first elastic body 70 and the other end of the movable body 80 connected to the first magnetic conductive body 40. This allows for a more compact structure without changing the original structure of the relay or occupying any internal space of the relay. Furthermore, the structure is simpler and assembly is easier. Although the first magnetic conductive body 40 acts directly on the movable body 80, since the movable body 80 is mounted in the first bore 623 of the fixed body 620, the magnetic attraction force generated between the first magnetic conductive body 40 and the movable contact 54 during the movement of the first magnetic conductive body 40 is not large relative to the force arm of the fulcrum formed by the movable body 80 and the first elastic body 70, and the generated stress is further reduced.

[0087] 5, the first elastic body 70 has a second perforation 711 corresponding to the first perforation 623. The movable body 80 is provided in the first perforation 623 and the second perforation 711. The movable body 80 includes a rod main body 820 and a pressing cap 810, and the pressing cap 810 is provided at one end of the rod main body 820. The pressing cap 810 is pressed against the peripheral edge of the second perforation 711 on the side facing away from the first magnetic conductive body 40.

[0088] During the process in which the first magnetic conductive body 40 receives the magnetic attraction force and moves from the first position P1 to the second position P2, the pressing cap 810 of the moving body 80 presses against the first elastic body 70 so as to compress the first elastic body 70.

[0089] One end of the movable body 80 may be fixedly or movably connected to the first elastic body 70, as long as the movable body 80 can apply force to the first elastic body 70 so as to compress the first elastic body 70 when the first magnetic conductive body 40 moves from the first position P1 to the second position P2.

[0090] 5, 21, and 22, the first magnetic conductive body 40 includes a plurality of stacked magnetic conductive pieces 410, each of which is provided with a third perforation 420. After the plurality of magnetic conductive pieces 410 are stacked, the positions of the plurality of third perforations 420 correspond to each other. The third perforations 420 correspond to the positions of the first perforations 623 and the second perforations 711. A step structure 821 is provided on the outer periphery of the rod main body 820 of the moving body 80, and the step structure 821 abuts against the periphery of the third perforation 420 of the first magnetic conductive body 40 on the side facing the first elastic body 70.

[0091] When assembling the movable body 80, the first magnetic conductive body 40, the fixed member 60, and the first elastic body 70, the movable body 80 passes through the second perforation 711 of the first elastic body 70, the first perforation 623 of the fixed member 60, and the plurality of third perforations 420 of the first magnetic conductive body 40, in that order. The step structure 821 of the rod main body 820 abuts against the periphery of the third perforation 420 of the magnetic conductive piece 410 that is farthest from the movable member 53 among the plurality of magnetic conductive pieces 410. One end of the rod main body 820 facing the movable contactor 54 is fixedly connected, for example by crimping, to the magnetic conductive piece 410 that is closest to the movable member 53 among the plurality of magnetic conductive pieces 410. The pressing cap 810 is pressed against the periphery of the second perforation 711.

[0092] As described above, at the first position P1, the magnetic conductive piece 410 of the first magnetic conductive body 40 that is farthest from the movable member 53 abuts against the surface of the first side 621 of the fixed body 620.

[0093] The first magnetic conductive body 40 includes multiple stacked magnetic conductive pieces 410. The magnetic conductive pieces 410 are relatively thin and can be made from thin strips of material, which reduces material costs and makes handling easy. Meanwhile, the number of magnetic conductive pieces 410 can be flexibly adjusted according to the magnitude of the short-circuit current, and the thickness of the first magnetic conductive body 40 can also be increased or decreased.

[0094] 5, the fixed body 620 of the fixed member 60, the first magnetic conductive body 40, and the first elastic body 70 are all located between the pair of fixed contact lead-out ends 20. In this way, the fixed body 620, the first magnetic conductive body 40, and the first elastic body 70 do not occupy the volume of the relay in the height direction, making the entire relay structure more compact and advantageous for reducing the volume.

[0095] The moving body 80 is movably provided on the side of the movable contactor 54 facing the fixed contact lead-out ends 20 , and the moving body 80 is located between the pair of fixed contact lead-out ends 20 .

[0096] In one embodiment, both the moving body 80 and the fixed member 60 are made of a metallic material.

[0097] As shown in Figures 21 and 22, the first elastic body 70 may be an elastic reed 710, thereby reducing the space occupied by the elastic reed 710 and providing space for the first magnetic conductive body 40 to move.

[0098] The second elastic body 56 may be an elastic reed, which can similarly reduce the space occupied by the second elastic body 56 to provide space for the first magnetic conductive body 40 to move.

[0099] The elastic lead 710 has avoidance notches 701 at both ends thereof, and the connecting body 610 passes through the avoidance notches 701. In the embodiment of the present invention, the first elastic body 70 has avoidance notches 701 at both opposing ends thereof, and the two connecting bodies 610 pass through the avoidance notches 701, respectively. By providing the avoidance notches 701 in the first elastic body 70, the connecting body 610 can pass through the first elastic body 70 and be connected to the fixed body 620, so that the assembled connecting body 610, fixed body 620, first elastic body 70 and first magnetic body 40 are more compact and do not occupy the internal space of the relay.

[0100] Of course, the elastic lead 710 may not be provided with the avoidance notch 701, or the elastic lead 710 may have a hole through which the connecting body 610 passes.

[0101] 23 and 24 , as a modified example, the first elastic body 70 may be a spring 720. One end of the spring 720 abuts against the fixed body 620, and the other end of the spring 720 abuts against a pressing piece 730. One end of the moving body 80 is connected to the pressing piece 730 and is pressed against the other end of the spring 720 via the pressing piece 730, and the other end of the moving body 80 passes through a first perforation 623 of the fixed body 620 and is connected to the first magnetic conductive body 40.

[0102] As shown in Figures 11 to 16, the relay of the second embodiment has substantially the same basic structure as the relay of the first embodiment. Therefore, in the following description of the relay of the second embodiment, the structure described in the first embodiment will not be described again. Furthermore, the same structures as those of the relay described in the first embodiment are denoted by the same reference numerals. Therefore, in the following description of this embodiment, differences from the relay of the first embodiment will be mainly described.

[0103] In this embodiment, the fixed member 60 is connected to the yoke plate 13, but is not directly connected to the ceramic cover 11. The movable body 80 is attached to the fixed member 60 so as to be movable.

[0104] One ends of two connecting bodies 610 of fixing member 60 are connected to both ends of fixing body 620 , respectively, and the other ends of two connecting bodies 610 are connected to yoke plate 13 .

[0105] In this embodiment, the fixing member 60 is connected to the yoke plate 13 but is not connected to the ceramic cover 11. This prevents the ceramic cover 11 from being opened and damaging its strength.

[0106] As shown in FIG. 14, the fixed member 60 and the yoke plate 13 form an accommodation space 30, and the movable member 53 and the first magnetic conductive body 40 are both provided within the accommodation space 30 so as to be movable.

[0107] As shown in Figures 17 to 20, the relay of the third embodiment has substantially the same basic structure as the relay of the first embodiment. Therefore, in the following description of the relay of the third embodiment, the structure described in the first embodiment will not be described again. Furthermore, the same structures as those of the relay described in the first embodiment are denoted by the same reference numerals. Therefore, in the following description of this embodiment, differences from the relay of the first embodiment will be mainly described.

[0108] The connecting body 610 includes an insertion portion 611 and a flange 612. The insertion portion 611 is drilled in the third through-hole 103 of the ceramic cover 11, and one end of the insertion portion 611 facing the fixed body 620 is adhered or welded to the fixed body 620. The flange 612 protrudes from one end of the insertion portion 611 facing away from the fixed body 620, and the flange 612 is welded to the periphery of the third through-hole 103 of the ceramic cover 11.

[0109] As an example, the insertion portion 611 has a cylindrical structure, the bottom surface of the cylindrical structure is welded to the side surface of the fixed body 620 facing away from the first magnetic conductive body 40, and the flange 612 is provided at the opening position of the cylindrical structure.

[0110] Of course, the insertion portion 611 is not limited to a cylindrical structure, but may be, for example, a columnar shape.

[0111] As shown in FIGS. 25 to 27, the relay of the fourth embodiment has a substantially identical basic structure to the relay of the first embodiment, the relay of the fifth embodiment has a substantially identical basic structure to the relay of the second embodiment, and the relay of the sixth embodiment has a substantially identical basic structure to the relay of the third embodiment. Therefore, in the following description of the relays of the fourth to sixth embodiments, the structures described in the first to third embodiments will not be described again. Furthermore, the same reference numerals are used to designate the same structures as those of the relays described in the first to third embodiments. Therefore, in the following description of the present embodiments, differences from the relays of the first to third embodiments will be mainly described.

[0112] In the relays of the fourth to sixth embodiments, the movable member 53 further includes a second magnetic conductive body 55 provided in the contact chamber 101, the second magnetic conductive body 55 is fixedly connected to the movable contactor 54, and the second magnetic conductive body 55 is located on the side of the movable contactor 54 facing away from the first magnetic conductive body 40, and the second magnetic conductive body 55 is used to form a magnetic circuit together with the first magnetic conductive body 40. In the embodiments of the present invention, the limit portion 571 may be provided in the second magnetic conductive body 55, but is not limited thereto.

[0113] As an example, the second magnetic conductive body 55 and the movable contact 54 may be fixedly connected by caulking, but the present invention is not limited to this.

[0114] The second magnetic conductive body 55 can be made of materials such as iron, cobalt, nickel, and alloys thereof.

[0115] In one embodiment, the second magnetic conductive body 55 may be, but is not limited to, a straight or U-shaped body.

[0116] When both ends of the movable contactor 54 contact the pair of fixed contact lead-out ends 20, the second magnetic conductive body 55, which moves together with the movable contactor 54, approaches or contacts the first magnetic conductive body 40, thereby forming a magnetic circuit surrounding the movable contactor 54 between the first magnetic conductive body 40 and the second magnetic conductive body 55. When a short-circuit current passes through the movable contactor 54, a magnetic attractive force is generated between the first magnetic conductive body 40 and the second magnetic conductive body 55 in the pressure direction of the contacts. This magnetic attractive force resists the electromotive repulsive force caused by the short-circuit current between the movable contactor 54 and the fixed contact lead-out ends 20, ensuring that the movable contactor 54 and the fixed contact lead-out ends 20 do not pop off.

[0117] In an embodiment of the present invention, the first magnetic conductive body 40 is movable relative to the movable member 53 via the movable body 80, and further, the distance between the first magnetic conductive body 40 and the movable member 53 is adjusted according to the magnitude of the current flowing through the movable contactor 54, thereby achieving both short-circuit resistance and limit breaking capability.

[0118] It should be noted that the various examples / embodiments provided by the present invention can be combined with each other without causing any contradiction, and therefore, the description thereof will be omitted here.

[0119] In the embodiments of the invention, the terms "first," "second," "third," "one," and "a pair" are used for descriptive purposes only and are not to be understood to indicate or imply relative importance. The term "plurality" means two or more unless otherwise limited. Terms such as "attached," "contact," "connected," and "fixed" should be understood broadly. For example, "connected" may mean a fixed connection, a detachable connection, or an integral connection. "Contacted" may mean a direct connection or an indirect connection via an intermediate medium. The specific meanings of the above terms in the embodiments of the present invention can be understood by those skilled in the art depending on the specific circumstances.

[0120] In describing the embodiments of the present invention, the orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "front," and "rear" are orientations or positional relationships based on the drawings and are intended merely to facilitate the description and simplification of the embodiments of the present invention, and do not indicate or imply that the indicated device or unit must have a particular direction in order to be configured and operate in a particular orientation, and should not be understood as limitations on the embodiments of the invention.

[0121] In the description herein, the terms "one embodiment," "some embodiments," "particular embodiment," etc., mean that the particular feature, structure, material, or characteristic described in connection with this embodiment or example is included in at least one embodiment or example of the invention. In this specification, general references to the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0122] The above are only preferred embodiments of the invention, and are not used to limit the invention, and those skilled in the art can make various modifications and changes to the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the invention shall be included in the protection scope of the invention.

Claims

1. a contact vessel having a contact chamber and a pair of first through holes communicating with the contact chamber; a pair of fixed contact lead ends respectively provided in the pair of first through holes; a movable body movable relative to the contact container; a first magnetic conductive body provided in the contact chamber and including a plurality of magnetic conductive pieces stacked and connected to the moving body; a movable member movably disposed within the contact chamber and including a movable contact; the movable contactor is adapted to come into contact with or separate from the pair of fixed contact lead-out ends, and the first magnetic conductive body is provided on the movable contactor on a side facing the fixed contact lead-out ends, the first magnetic conductive body is movable relative to the movable member via the moving body, and adjusts the distance between the first magnetic conductive body and the movable member in accordance with the magnitude of the current flowing through the movable contactor; a first elastic body for applying an elastic force to the moving body so that the first magnetic conductive body has a tendency to move in a direction away from the movable member; One end of the moving body is connected to the first elastic body, and the other end of the moving body is connected to the first magnetic conductive body. relay.

2. 2. The relay according to claim 1, wherein the distance between said first magnetic conductive body and said movable member is the maximum distance between said first magnetic conductive body and said movable member.

3. the first magnetic conductive body moves between a first position and a second position via the moving body; At the first position, a distance between the first magnetic conductive body and the movable member is a first interval, and at the second position, a distance between the first magnetic conductive body and the movable member is a second interval, and the first interval is larger than the second interval. The relay of claim 1 .

4. 4. The relay of claim 3, wherein in said second position, said second spacing between said first magnetic conductive body and said movable member is equal to zero.

5. the first magnetic conductive body is located at the first position, and the value of the current flowing through the movable contact is equal to or less than a threshold current; When the value of the current flowing through the movable contact is greater than the threshold current, the first magnetic conductive body moves from the first position to the second position. The relay according to claim 3 .

6. The relay further includes a fixed member fixedly provided within the contact container, The movable body is movably attached to the fixed member. The relay of claim 1 .

7. the fixed member has a first side facing the movable member and a second side opposite the first side, the first elastic body is provided on the second side, the first magnetic conductive body and the movable member are provided on the first side, and the first magnetic conductive body is provided between the first elastic body and the movable member.

7. The relay of claim 6.

8. the securing member has a first perforation extending through the first side surface and the second side surface; The movable body is rod-shaped and movably provided in the first hole.

8. The relay of claim 7.

9. the first elastic body has second perforations corresponding to the first perforations; The moving body is provided in the first hole and the second hole.

9. The relay of claim 8.

10. 10. The relay according to claim 9, wherein the movable body includes a rod body and a pressing cap provided at one end of the rod body, the pressing cap being pressed against a peripheral edge of the second bore on a side facing away from the first magnetic conductive body.

11. Each of the magnetic conductive pieces is provided with a third perforation corresponding to the positions of the first perforation and the second perforation, and the rod body is perforated with the second perforation, the first perforation, and the third perforation in sequence; A step structure is provided on the outer periphery of the rod body, One end of the rod body facing the movable member is fixedly connected to one of the plurality of magnetic conductive pieces that is closest to the movable member, the step structure is in contact with a peripheral edge of the third perforation of one of the plurality of magnetic conductive pieces that is farthest from the movable member, the peripheral edge facing the first elastic body. The relay of claim 10.

12. the first magnetic conductive body moves between a first position and a second position via the moving body, a distance between the first magnetic conductive body and the movable member at the first position is a first interval, a distance between the first magnetic conductive body and the movable member at the second position is a second interval, and the first interval is larger than the second interval; At the first position, one of the plurality of magnetic conductive pieces that is farthest from the movable member abuts against the surface on the first side, and one end of the movable body presses against the first elastic body so that the first elastic body has an elastic preload force.

8. The relay of claim 7.

13. 2. The relay according to claim 1, wherein the plurality of magnetic conductive pieces and the first elastic body are all provided between the pair of drawn-out ends of the fixed contacts.

14. The relay according to claim 1 , wherein the first elastic body includes a reed or a spring.

15. The contact vessel comprises: A yoke board and an insulating cover that covers a side surface of the yoke plate facing the fixed contact lead-out end, the insulating cover and the yoke plate are enclosed as the contact chamber, and the pair of first through holes are opened in the insulating cover; The fixing member is connected to the insulating cover or the yoke plate.

7. The relay of claim 6.

16. 2. The relay according to claim 1, wherein the direction of movement of said first magnetic conductive body relative to said movable member is along the direction of contact / separation between said movable contact and said fixed contact lead end.

17. 2. The relay according to claim 1, wherein the movable body is movably provided on a side of the movable member facing the fixed contact drawn-out ends, and the movable body is located between the pair of fixed contact drawn-out ends.

18. The relay according to claim 1 , wherein the moving body is made of a metal material.

19. the movable member further includes a second magnetic conductive body; the second magnetic conductive body is fixedly connected to a side of the movable contactor facing away from the first magnetic conductive body, and the second magnetic conductive body forms a magnetic circuit together with the first magnetic conductive body. The relay of claim 1 .

Images