relay

Abstract

To provide a relay that achieves both the short-circuit resistance capacity and ultimate breaking capacity.SOLUTION: A relay comprises a contact container, a pair of stationary contact lead-out ends, a movable body, a first magnetically permeable body, and a movable member. The contact container has a contact chamber and a pair of first through holes communicating with the contact chamber. The pair of stationary contact lead-out ends are pierced in the pair of first through holes, respectively. The movable body is provided in the contact chamber and is movable relative to the contact container. The first magnetically permeable body is provided in the contact chamber and connected to the movable body. The movable member is provided in the contact chamber. The movable member has a movable contactor that is 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 contactor 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 contactor.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 elements, and in particular to relays. [Background technology]

[0002] A relay is an electronic control element that has a control system (also called an input circuit) and a controlled system (also called an output circuit), and is usually applied to 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 electromotive repulsive force caused by short-circuit current, related technologies typically use short-circuit-resistant ring electromagnetic structures. Depending on the location of the upper magnetic conductor of the short-circuit-resistant ring, these structures can be further divided into a tracking structure and a fixed structure. Specifically, a tracking structure means that the upper magnetic conductor is located on the moving assembly of the relay, while a fixed structure means that the upper magnetic conductor is located in a fixed position other than the moving assembly. However, while the fixed structure significantly enhances short-circuit resistance, it also reduces interruption capability due to the negative correlation between short-circuit resistance and breaking capability. However, a tracking structure is affected by the holding force of the moving core. Under high short-circuit currents, the core will disengage and the contacts will separate. Increasing the holding force of the moving core requires a larger coil, which contradicts the goal of miniaturization and weight reduction. Summary of the Invention

[0004] The embodiments of the present invention provide a relay that combines short-circuit withstanding capability with ultimate breaking capability.

[0005] A relay according to an embodiment of the present invention comprises: 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 that is movable relative to the contact container; a first magnetic conductive body provided in the contact chamber and connected to the movable body; a movable member disposed within the contact chamber; the movable member includes a movable contactor configured to contact or move away from the pair of fixed contact lead-out ends, and the first magnetic conductive body is provided on one side of the movable contactor facing the fixed contact lead-out ends; The first magnetic conductive body is movable relative to the movable contactor via the movable body, and is configured 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 contactor.

[0006] According to some embodiments of the present invention, the distance between the first magnetic conductive body and the movable member is the maximum distance among the distances between the first magnetic conductive body and the movable member.

[0007] According to some embodiments of the present invention, the first magnetic conductive body is moved between a first position and a second position via the movable body, In the first position, the distance between the first magnetic body and the movable member is a first interval, and in the second position, the distance between the first magnetic body and the movable member is a second interval, and the first interval is greater than the second interval.

[0008] According to some embodiments of the present invention, when the first magnetic conductive body is located at the first position, a value of a 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, in the second position, the second gap between the first magnetic conductive body and the movable member is equal to zero.

[0010] According to some embodiments of the present invention, the relay further comprises a fixing member; The fixed member is fixedly provided within the contact container, and the movable body is movably attached to the fixed member.

[0011] According to some embodiments of the present invention, the relay further comprises a first elastic member; The first elastic member applies an elastic force to the movable body so that the first magnetic conductive body tends to move in a direction away from the movable contact.

[0012] According to some embodiments of the present invention, the fixed member has a first side facing the movable contact and a second side located opposite to the first side, the first elastic member is provided on the second side, the first magnetic conductive body and the movable contact are provided on the first side, and the first magnetic conductive body is provided between the first elastic member and the movable contact, One end of the movable body is connected to the first elastic member, and the other end is connected to the first magnetic conductive body.

[0013] According to some embodiments of the present invention, the fixing member has a first perforation passing through the first surface and the second surface; The movable body is rod-shaped and is movably provided in the first hole.

[0014] According to some embodiments of the present invention, the first elastic member has second perforations corresponding to the first perforations, The movable body is provided in the first hole and the second hole.

[0015] 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, and the pressing cap presses the peripheral edge of one side of the second perforation facing away from the first magnetic conductive body.

[0016] According to some embodiments of the present invention, the first magnetic conductive body is provided with a third perforation corresponding to the positions of the first perforation and the second perforation, and the rod body is drilled through the second perforation, the first perforation, and the third perforation in this order; A step structure is provided on the outer periphery of the rod body, and one end of the rod body facing the movable contactor is fixedly connected to the first magnetic conductive body, and the step structure abuts against the peripheral edge of one side of the third perforation facing the first elastic member.

[0017] According to some embodiments of the present invention, the first magnetic conductive body moves between a first position and a second position via the movable body, and 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, the first interval being greater than the second interval; At the first position, the first magnetic conductive body abuts against the surface on the first side, and one end of the movable body presses against the first elastic member, causing the first elastic member to have an elastic preload force.

[0018] According to some embodiments of the present invention, the first magnetic conductive body and the first elastic member are both provided between the pair of fixed contact lead-out ends.

[0019] According to some embodiments of the invention, the first elastic member comprises a reed or a spring.

[0020] According to some embodiments of the present invention, the fixing member includes a connecting portion and a fixing portion, one end of the connecting portion is connected to the contact container and the other end of the connecting portion is connected to the fixing portion, and the fixing portion has a first side facing the movable contact and a second side located opposite to the first side, the first magnetic conductive body is provided on the first side, and the first elastic member is provided on the second side; One end of the movable body is connected to the first elastic member, and the other end is connected to the first magnetic conductive body.

[0021] According to some embodiments of the present invention, the direction of movement of the first magnetic body relative to the movable contactor is along the direction of contact / separation between the movable contactor and the fixed contact lead-out end.

[0022] According to some embodiments of the present invention, the movable body is movably provided on one side of the movable contactor facing the fixed contact lead-out ends, and the movable body is located between the pair of fixed contact lead-out ends.

[0023] According to some embodiments of the present invention, the movable body is made of a metallic material. According to some embodiments of the present invention, the contact vessel includes a yoke plate and an insulating cover; The insulating cover covers one side of the yoke plate facing the fixed contact pull-out end, the insulating cover and the yoke plate surround the contact chamber, and a pair of the first through holes are opened in the insulating cover.

[0024] One embodiment of the above invention has at least the following advantages or beneficial effects.

[0025] In a relay according to an embodiment of the present invention, the movable body is movable relative to the contact container, the first magnetic conductive body is connected to the movable body, and the first magnetic conductive body is movable relative to the movable contactor via the movable body. Therefore, the distance between the first magnetic conductive body and the movable member can be adjusted according to the magnitude of the current flowing through the movable contactor, and further, the magnitude of the magnetic attraction force generated between the first magnetic conductive body and the movable member can be adjusted to satisfy the requirements for short-circuit resistance while also meeting the requirements for overload interruption. [Brief explanation of the drawings]

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

[0027] 10, contact vessel; 101, contact chamber; 102, first through-hole; 103, second through-hole; 11a, insulating cover; 11, ceramic cover; 12, flange member; 13, yoke plate; 131, third through-hole; 20, fixed contact lead-out end; 30, accommodation 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 member; 57, slide structure; 571, limit portion; 572, limit hole; 60, fixing member; 610, connecting portion; 611, insert portion; 612, flange; 620, fixing portion; 621, first side; 622, second side; 623, first perforation; 70, first elastic member; 701, avoidance notch; 710, elastic lead; 711, second perforation; 720, spring; 730, pressing piece; 80, movable 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 disposed within the housing 1100.

[0030] It will be understood that the terms "comprises" and "having," and any variations thereof, in 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 that are not listed, or optionally includes other steps or units inherent to such process, method, product, or device.

[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 arranged 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 of the yoke clamps 1320 around the arc-extinguishing magnets 1310 prevents the magnetic field generated by the arc-extinguishing magnets 1310 from diffusing outward 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, the seal unit 1400 of the 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 member 70.

[0037] The contact vessel 10 is a fixed component used to house the contact assembly and can be understood to be a device that is primarily a case with a chamber, or the contact vessel 10 may be made up of multiple components connected in a predetermined assembly manner.

[0038] The contact vessel 10 has therein a contact chamber 101. The contact vessel 10 includes an insulating cover 11a and a yoke plate 13. The insulating cover 11a covers one side of the yoke plate 13, and the contact chamber 101 is formed by being surrounded by the insulating cover 11a and the yoke plate 13.

[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 can be formed as a ring-shaped metal part 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 is connected to the yoke plate 13, and may also be connected by laser welding, brazing, resistance welding, adhesive bonding, or the like. By providing the flange member 12 between the ceramic cover 11 and the yoke plate 13, the connection between the ceramic cover 11 and the yoke plate 13 can be facilitated.

[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 for allowing the fixed contact lead-out ends 20 to pass through. In this embodiment of the present invention, the first through holes 102 are open to 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 bored in the pair of first through holes 102 in a one-to-one correspondence, 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 vessel 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 member 56.

[0045] The yoke plate 13 has a third through hole 131, which penetrates two opposing sides of the yoke plate 13 in the thickness direction of the yoke plate 13 and is connected to the contact chamber 101 of the contact vessel 10. The push rod 51 is drilled in the third through hole 131 so as to be movable in 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 has a movable contact 54, and both ends of the movable contact 54 are used to contact the bottoms of the pair of fixed contact pull-out ends 20 to achieve contact closure. The movable contact 54 has a movable contact piece and movable contacts provided on both ends of the movable contact piece in the longitudinal direction. 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 member 56 is connected to the movable contact 54 and the base 52 and is used to apply an elastic force to the movable contact 54 to move it toward the fixed contact lead-out end 20 .

[0049] The push rod assembly 50 further includes a slide structure 57 connected to the base 52 and the movable contact 54, and the movable contact 54 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 extends slidably within the limit hole 572.

[0050] In the embodiment of the present invention, the base 52 is directly connected to the movable contact 54 via the slide structure 57, which simplifies the assembly between the base 52 and the movable contact 54. Furthermore, since there is no other member between the movable contact 54 and the first magnetic conductive body 40, movement interference between the other member and the first magnetic conductive body 40 during overtravel is avoided.

[0051] The limit hole 572 may be a through hole or a blind hole.

[0052] As an example, the base 52 is provided with a limit hole 572, and the movable contact 54 is provided with a limit portion 571.

[0053] Of course, in other embodiments, the push rod assembly 50 may have other configurations, not all of which are listed here.

[0054] 4 to 6, seal unit 1400 further includes metal cover 1410, which is connected to the side of yoke plate 13 facing away from insulating cover 11a and covers third through-hole 131 on yoke plate 13. Metal cover 1410 and yoke plate 13 are enclosed as a chamber for accommodating fixed iron core 1230 and movable iron core 1240 of electromagnet unit 1200.

[0055] 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 fits into the third through-hole 131. The fixed core 1230 has a through-hole 1231, which is provided at a position corresponding to the third through-hole 131 and is for inserting the push rod 51 therethrough. 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 used to be 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.

[0056] The reset member 1250 is located inside the metal cover 1410, 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.

[0057] When the coil 1220 is energized, the electromagnet unit 1200 drives the push rod assembly 50 through the push rod 51 to move it upward. When the movable contact 54 comes into contact with the fixed contact drawn-out end 20, the movable contact 54 is stopped by the fixed contact drawn-out end 20, but the push rod 51 and the base 52 continue to move upward until the overtravel is completed.

[0058] 4 to 6, the first magnetic conductive body 40 is disposed within the contact chamber 101, and is disposed on one side of the movable contactor 54 facing the fixed contact lead-out end 20. The fixed member 60 is fixedly provided within the contact container 10. The movable body 80 is movably attached to the fixed member 60. The first magnetic conductive body 40 is disposed within the contact chamber 101 and connected to the movable body 80, and is movable relative to the movable contactor 54 via the movable body 80.

[0059] It will be appreciated that the first magnetic conductor 40 may be made using materials such as iron, cobalt, nickel, and alloys thereof.

[0060] In one embodiment, the first magnetic conductive body 40 may be, but is not limited to, a straight line shape. For example, the first magnetic conductive body 40 may be a U-shape.

[0061] When both ends of the movable contact 54 come into contact with the pair of fixed contact pull-out ends 20, a current flows through the movable contact 54, forming a magnetic circuit surrounding the movable contact 54 on the outer periphery in the longitudinal direction 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 the current flows. This magnetic attractive force can counteract 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.

[0062] As a result of the above, a magnetic attraction force is generated between the first magnetic conductive body 40 and the movable contact 54 through which current flows, along the pressure direction of the contact. This magnetic attraction force can counteract the electric repulsive force caused by the short-circuit current between the movable contact 54 and the fixed contact pull-out end 20, ensuring that the movable contact 54 and the fixed contact pull-out end 20 do not bounce off each other.

[0063] When the current value flowing through the movable contact 54 is constant, the magnitude of the magnetic attraction force generated between the first magnetic conductive body 40 and the movable contact 54 is inversely proportional to the distance between the first magnetic conductive body 40 and the movable contact 54, and the smaller the distance, the greater the magnetic attraction force generated.

[0064] In order to resist the electromotive repulsive force generated by the short-circuit current and prevent the movable contact 54 and the fixed contact pull-out end 20 from popping off, it is necessary to design the gap between the first magnetic conductive body 40 and the movable contact 54 to be smaller, thereby increasing the magnetic attraction force between the first magnetic conductive body 40 and the movable contact 54.

[0065] In order to facilitate timely disconnection, the distance between the first magnetic conductive body 40 and the movable contact 54 needs to be designed to be larger, thereby reducing the magnetic attraction force between the first magnetic conductive body 40 and the movable contact 54 and preventing excessive magnetic attraction force from affecting timely disconnection.

[0066] This shows that when the distance between the first magnetic conductive body 40 and the movable contact 54 is a fixed value, it is not possible to achieve both short-circuit resistance and ultimate breaking capacity.

[0067] In the 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 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 ultimate breaking capability. In some embodiments, the distance between the first magnetic conductive body 40 and the movable contactor 54 varies. For example, if the first magnetic conductive body 40 and the movable contactor 54 are not parallel, the distance between the first magnetic conductive body 40 and the movable contactor 54 varies at different positions. In this case, the distance between the first magnetic conductive body 40 and the movable contactor 54 refers to the maximum distance between the first magnetic conductive body 40 and the movable contactor 54.

[0068] As shown in FIGS. 5 to 10 , the first magnetic conductive body 40 is movable between a first position P1 and a second position P2 via the movable 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, and the first gap H1 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. This changes the magnitude of the magnetic attractive force generated between the first magnetic conductive body 40 and the movable contact 54, achieving both short-circuit current resistance and ultimate 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 are in 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 member 70 is used to provide an elastic force to the movable 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 member 70 is used to provide an elastic force to the movable body 80 so that the first magnetic conductive body 40 has a tendency to move toward the first position P1.

[0071] Hereinafter, with reference to FIGS. 5 to 10, a description will be given of how the embodiment of the present invention achieves both short-circuit current resistance and ultimate breaking capability.

[0072] As shown in FIGS. 5 to 7 , the relay is in a normal operating state, 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 at this time, the magnetic attractive force between the first magnetic conductive body 40 and the movable contact 54 is also small. This magnetic attractive force is smaller than the elastic preload of the first elastic member 70 at this time. Therefore, the elastic force of the first elastic member 70 cancels out the magnetic attractive force between the first magnetic conductive body 40 and the movable contact 54, thereby maintaining the first magnetic conductive body 40 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, this first gap H1 may be 1.5 mm, but is not limited to this.

[0073] It can be understood that the magnitude of the threshold current can be adjusted according to the type of relay, for example, if the maximum interrupting current of the relay is large, the threshold current can also be set larger, thereby ensuring that the first magnetic conductive body 40 remains in the first position P1 and does not move to the second position P2 under normal operating conditions of the relay.

[0074] 8 to 10 , when the value of the current flowing through the movable contact 54 is larger than the threshold current, for example, the current is larger than 2000 A, and the magnetic attractive force between the first magnetic conductive body 40 and the movable contact 54 is proportional to the current value, so the larger the current value, the stronger the magnetic attractive force between the first magnetic conductive body 40 and the movable contact 54. When the magnetic attractive force is larger than the elastic preload of the first elastic member 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), and the gap between the first magnetic conductive body 40 and the movable contact 54 becomes smaller. Furthermore, because the magnitude of the magnetic distance is inversely proportional to the magnitude of the magnetic attractive force, that is, the smaller the magnetic distance, the stronger the magnetic attractive force. When a short-circuit current (much greater than the threshold current) flows, a larger magnetic attractive force is generated between the first magnetic body 40 and the movable contact 54. This magnetic attractive force compresses the first elastic member 70, allowing the first magnetic body 40 to move 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 decreases, the magnetic attractive force between the first magnetic body 40 and the movable contact 54 increases. Therefore, the first magnetic body 40 can attract the movable contact 54 with this large magnetic attractive force, which can counteract the electromotive repulsive force generated by the short-circuit current and prevent the movable contact 54 and the fixed contact lead-out end 20 from bouncing off, thereby achieving short-circuit resistance.

[0075] As can be seen from the above, in the relay according to 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, and 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. Furthermore, by changing the magnitude of the magnetic attraction force generated between the first magnetic conductive body 40 and the movable contact 54, it is possible to satisfy the requirements for short-circuit resistance while also meeting the requirements for overload interruption.

[0076] As the first magnetic conductive body 40 moves from the first position P1 to the second position P2, the first elastic member 70 is gradually compressed, and the counter-elastic force that the first elastic member 70 exerts on the movable body 80 gradually increases. When the value of the current flowing through the movable contact 54 is greater than the threshold current but has not yet reached the short-circuit current, the gradually increasing counter-elastic force holds the first magnetic conductive body 40 at an intermediate 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 larger magnetic attractive force is generated between the first magnetic conductive body 40 and the movable contact 54. This magnetic attractive force is sufficient to overcome the counter-elastic force of the first elastic member 70, so the first magnetic conductive body 40 continues to move toward the second position P2 and continues to compress the first elastic member 70 until the first magnetic conductive body 40 reaches the second position P2.

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

[0078] By connecting the fixed member 60 to the contact vessel 10 via the connection part 610, the short-circuit resistant magnetic attraction force is transmitted to the contact vessel 10, and since the contact vessel 10 is a fixed part, excessive coil holding force is not required, which reduces the power consumption of the relay coil, makes the relay smaller, and improves the short-circuit resistance capacity.

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

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

[0081] In the embodiment of the present invention, a second through-hole 103 is formed in the top wall of the ceramic cover 11 of the contact vessel 10, and the connecting part 610 may be columnar and is drilled through the second through-hole 103. The connection between one end of the connecting part 610 and the ceramic cover 11 can be achieved by various methods, such as welding, crimping, screwing, or adhesive. The connection between the other end of the connecting part 610 and the fixing part 620 can also be achieved by various methods, such as welding, crimping, screwing, or adhesive.

[0082] When one end of the connection part 610 is connected to the ceramic cover 11 by welding, by welding the connection part 610 to the top wall of the ceramic cover 11, the metallized layer can be processed only on the periphery of the second through hole 103 on the outer wall surface of the top wall without processing the metallized layer on the inner wall surface of the top wall, which not only makes processing easier but also simplifies the processing procedure.

[0083] The shape of the movable body 80 can be variously embodied, for example, the movable body 80 may be columnar, and one end of the movable body 80 and the first elastic member 70 may be connected by welding, crimping, screwing, adhesive, etc., and the other end of the movable body 80 and the first magnetic conductive body 40 may be connected by welding, crimping, screwing, adhesive, etc. As a modified example, the shape of the movable body 80 may be an inverted U-shape, with the top of the inverted U-shape connected to the first elastic member 70 and the two side parts of the inverted U-shape connected to both sides of the first magnetic conductive body 40, respectively.

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

[0085] When the movable body 80 has a columnar shape, the fixed part 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 part 620, and one end of the movable body 80 presses the first elastic member 70, causing the first elastic member 70 to have an elastic preload.

[0086] On the one hand, because the first magnetic conductive body 40 and the first elastic member 70 are respectively provided on two opposing side surfaces of the fixed part 620, there are no other components between the first magnetic conductive body 40 and the movable contact 54, so that 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 may even 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, because the first elastic member 70 is provided on the surface of the second side 622 of the fixed part 620 and is not in direct contact with the first magnetic conductive body 40, it does not affect the magnetic pole surface of the first magnetic conductive body 40. On the other hand, since the movable body 80 is movably mounted in the first bore 623 of the fixed portion 620, one end of the movable body 80 presses the first elastic member 70, and the other end of the movable body 80 is connected to the first magnetic conductive body 40, the structure is more compact, the original structure of the relay is not changed, and the internal space of the relay is not occupied. Furthermore, the structure is simple and assembly is easy. Furthermore, since the first magnetic conductive body 40 acts directly on the movable body 80 and the movable body 80 is mounted in the first bore 623 of the fixed portion 620, the magnetic attraction force generated between the first magnetic conductive body 40 and the movable contact 54 during movement of the first magnetic conductive body 40 does not have a large force arm relative to the fulcrum formed by the movable body 80 and the first elastic member 70, and therefore the generated stress is relatively small.

[0087] 5, the first elastic member 70 has second perforations 711 corresponding to the first perforations 623. A movable body 80 is provided in the first perforations 623 and the second perforations 711. The movable body 80 includes a rod body 820 and a pressing cap 810. The pressing cap 810 is provided at one end of the rod body 820, and the second perforations 711 press the periphery of one side facing away from the first magnetic conductive body 40.

[0088] When the first magnetic conductive body 40 moves from the first position P1 to the second position P2 due to the magnetic attractive force, the pressing cap 810 of the movable body 80 presses the first elastic member 70 to compress the first elastic member 70.

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

[0090] The first magnetic conductive body 40 is provided with a third perforation 420 corresponding to the positions of the first perforation 623 and the second perforation 711. A step structure 821 is provided on the outer periphery of the rod main body 820 of the movable body 80, and the step structure 821 is used to abut against the peripheral edge of one side of the third perforation 420 of the first magnetic conductive body 40 facing the first elastic member 70.

[0091] When assembling the movable body 80, the first magnetic conductive body 40, the fixed member 60, and the first elastic member 70, the movable body 80 passes through the second perforation 711 of the first elastic member 70, the first perforation 623 of the fixed member 60, and the third perforation 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. One end of the rod main body 820 toward the movable contactor 54 is fixedly connected to the first magnetic conductive body 40 by, for example, crimping. The pressing cap 810 presses against the periphery of the second perforation 711.

[0092] 5, the fixed portion 620 of the fixed member 60, the first magnetic conductive body 40, and the first elastic member 70 are all located between the pair of fixed contact pull-out ends 20. This means that the fixed portion 620, the first magnetic conductive body 40, and the first elastic member 70 do not occupy the volume of the relay in the height direction, making the entire relay structure more compact and enabling miniaturization.

[0093] The movable body 80 is movably provided on the side of the movable contactor 54 opposite the fixed contact lead-out ends 20 , and is positioned between the pair of fixed contact lead-out ends 20 .

[0094] In one embodiment, both the movable body 80 and the fixed member 60 are made of a metal material to improve connection strength.

[0095] As shown in FIGS. 21 and 22, the first elastic member 70 may be an elastic reed 710, which reduces the space occupied by the elastic reed 710 and provides the first magnetic conductive body 40 with space to move.

[0096] The second elastic member 56 may be an elastic reed, which can also reduce the space occupied by the second elastic member 56 and provide the first magnetic conductive body 40 with space to move.

[0097] The elastic reed 710 has avoidance notches 701 at both ends, and the connecting portion 610 passes through the avoidance notches 701. In the embodiment of the present invention, the first elastic member 70 has avoidance notches 701 at both ends, and the two connecting portions 610 pass through the avoidance notches 701, respectively. By providing the avoidance notches 701 in the first elastic member 70, the connecting portion 610 can pass through the first elastic member 70 and connect to the fixed portion 620, so that the connecting portion 610, the fixed portion 620, the first elastic member 70, and the first magnetic conductive body 40 are more compact after assembly and do not occupy the internal space of the relay.

[0098] Of course, the elastic lead 710 does not have to be provided with the avoidance notch 701, or a hole for passing the connecting portion 610 may be opened in the elastic lead 710.

[0099] The first magnetic conductive body 40 can include multiple laminated magnetic conductive pieces 410. On the one hand, the magnetic conductive pieces 410 are relatively thin and can be made from thin materials, which reduces material costs and makes them easy to handle. On the other hand, 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 be increased or decreased.

[0100] Of course, the first magnetic conductive body 40 may not be configured by stacking a plurality of magnetic conductive pieces 410, but may be integrated.

[0101] 23 and 24 , as a modified example, the first elastic member 70 may be a spring 720. One end of the spring 720 abuts against the fixed portion 620, and the other end of the spring 720 abuts against a pressing piece 730. One end of the movable body 80 is connected to the pressing piece 730 and is pressed against the other end of the spring 720 by the pressing piece 730, and the other end of the movable body 80 passes through a first perforation 623 of the fixed portion 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 a basic structure that is substantially the same as that of the relay of the first embodiment. Therefore, in the following description of the relay of the second embodiment, the structure already described in the first embodiment will not be repeated. Note that the same reference numerals are used to designate the same components as those in the relay described in the first embodiment. Therefore, the following description of this embodiment will focus on the differences from the relay of the first embodiment.

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

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

[0105] In this embodiment, the fixing member 60 is connected to the yoke plate 13, but not to the ceramic cover 11. This prevents holes from being formed in the ceramic cover 11, which would reduce the strength of the ceramic cover 11.

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

[0107] As shown in Figures 17 to 20, the relay of the third embodiment has a basic structure that is substantially the same as that of the relay of the first embodiment. Therefore, in the following description of the relay of the third embodiment, the structure already described in the first embodiment will not be repeated. Note that the same reference numerals are used to designate the same components as those in the relay described in the first embodiment. Therefore, in the following description of this embodiment, the differences from the relay of the first embodiment will be mainly described.

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

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

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

[0111] As shown in Figures 25 to 27, the relay of the fourth embodiment has a similar basic structure to the relay of the first embodiment, the relay of the fifth embodiment has a similar basic structure to the relay of the second embodiment, and the relay of the sixth embodiment has a similar 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 already described in the first to third embodiments will not be repeated. Note that the same reference numerals are used to designate the same components as those in the relays described in the first to third embodiments. Therefore, the following description of this embodiment will focus on the differences from the relays of the first to third embodiments.

[0112] In the relays of the fourth to sixth embodiments, the movable member 53 further includes a second magnetic conductive body 55, which is fixedly connected to the movable contactor 54. 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 with the first magnetic conductive body 40. In the embodiment of the present invention, the limit portion 571 is provided on the movable member 53. Furthermore, the limit portion 571 can be provided on the second magnetic conductive body 55, but is not limited to this.

[0113] The second elastic member 56 is connected to the movable member 53 and the base 52 and is used to apply an elastic force to the movable member 53 to move it toward the fixed contact pull-out end 20 .

[0114] As an example, the second magnetic conductive body 55 and the movable contact 54 may be fixedly connected by a rivet, but the present invention is not limited to this.

[0115] The second magnetic conductive body 55 may be made of a material such as iron, cobalt, nickel, or an alloy thereof. The second magnetic conductive body 55 may be U-shaped, but is not limited to this. For example, the second magnetic conductive body 55 may be straight-shaped. 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 direction of pressure on the contacts. This magnetic attractive force can resist 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.

[0116] 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 by adjusting the distance between the first magnetic conductive body 40 and the second magnetic conductive body 55 depending on the magnitude of the current flowing through the movable contactor 54, both short-circuit resistance capability and ultimate breaking capability are achieved.

[0117] It should be noted that the various embodiments / exemplary 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.

[0118] In the embodiments of the invention, the terms "first," "second," "third," "a pair," and "one" are used for descriptive purposes only and should not 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.

[0119] 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 is required to have a particular orientation or be configured and operate in a particular orientation, and therefore should not be understood as limitations on the embodiments of the invention.

[0120] 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.

[0121] The above is only a preferred embodiment of the invention, and is 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 should 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 that is movable relative to the contact container; a first magnetic conductive body provided in the contact chamber and connected to the movable body; a movable member disposed within the contact chamber; the movable member includes a movable contactor configured to contact or move away from the pair of fixed contact lead-out ends, the first magnetic conductive body being provided on one side of the movable contactor facing the fixed contact lead-out ends, the first magnetic conductive body is movable relative to the movable contactor via the movable body, and is configured to adjust 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; Further comprising a first elastic member; the first elastic member applies an elastic force to the movable body so that the first magnetic conductive body tends to move in a direction away from the movable contact; One end of the movable body is connected to the first elastic member, and the other end is connected to the first magnetic conductive body. A relay characterized by:

2. The distance between the first magnetic conductive body and the movable member is the maximum distance between the first magnetic conductive body and the movable member.

2. The relay according to claim 1.

3. the first magnetic conductive body moves between a first position and a second position via the movable 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.

2. The relay according to claim 1.

4. When the first magnetic conductive body is located at the first position, 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 body moves from the first position to the second position.

4. The relay according to claim 3.

5. In the second position, the second distance between the first magnetic conductive body and the movable member is equal to zero.

4. The relay according to claim 3.

6. The relay further includes a fixing member. The fixed member is fixedly provided in the contact container, and the movable body is movably attached to the fixed member.

2. The relay according to claim 1.

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

7. The relay according to claim 6.

8. the fixing member has a first perforation penetrating the first surface and the second surface; The movable body is rod-shaped and movably provided in the first hole.

8. The relay according to claim 7.

9. the first elastic member has second perforations corresponding to the first perforations; The movable body is provided in the first perforation and the second perforation.

9. The relay according to claim 8.

10. The movable body includes a rod body and a pressing cap provided at one end of the rod body, and the pressing cap presses a peripheral edge of one side of the second bore facing the first magnetic conductive body.

10. The relay according to claim 9.

11. the first magnetic conductive body 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 this order; A step structure is provided on the outer periphery of the rod body, and one end of the rod body facing the movable contact is fixedly connected to the first magnetic conductive body, and the step structure abuts against the periphery of one side of the third bore facing the first elastic member.

11. The relay according to claim 10.

12. the first magnetic conductive body moves between a first position and a second position via the movable body; In the first position, a distance between the first magnetic conductive body and the movable member is a first interval, and in the second position, a distance between the first magnetic conductive body and the movable member is a second interval, the first interval being greater than the second interval; At the first position, the first magnetic conductive body abuts against the surface of the first side, and one end of the movable body presses the first elastic member, causing the first elastic member to have an elastic preload.

8. The relay according to claim 7.

13. The first magnetic conductive body and the first elastic member are both provided between the pair of fixed contact lead-out ends.

2. The relay according to claim 1.

14. The first elastic member includes a reed or a spring.

2. The relay according to claim 1.

15. the fixed member includes a connecting portion and a fixing portion, one end of the connecting portion is connected to the contact container and the other end of the connecting portion is connected to the fixing portion, and the fixing portion has a first side facing the movable contact and a second side located opposite to the first side, The first magnetic conductive body is provided on the first side, and the first elastic member is provided on the second side.

7. The relay according to claim 6.

16. The direction of movement of the first magnetic body relative to the movable contactor is along the direction of contact / separation between the movable contactor and the fixed contact lead-out end.

2. The relay according to claim 1.

17. The movable body is movably provided on one side of the movable contactor facing the fixed contact lead-out ends, and the movable body is located between the pair of fixed contact lead-out ends.

2. The relay according to claim 1.

18. The movable body is made of a metal material.

2. The relay according to claim 1.

19. The contact vessel includes a yoke plate and an insulating cover, The insulating cover covers one side surface of the yoke plate facing the fixed contact lead-out end, the insulating cover and the yoke plate surround the contact chamber, and the insulating cover has a pair of the first through holes.

2. The relay according to claim 1.

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