relay

Abstract

To provide a relay for solving problems with the related art.SOLUTION: A relay is provided comprising a contact container, a pair of static contact leading-out terminals, a connection member, a first magnetizer, and a pushing rod assembly. The contact container has a contact chamber, a pair of first through holes, and a second through hole, both the first and second through holes being in communication with the contact chamber. The pair of static contact leading-out terminals passes through the pair of the first through holes in one-to-one correspondence, and is connected to the contact container. The connection member passes through the second through hole and comprises a first end and a second end, the first end being connected to the contact container. The first magnetizer is disposed in the contact chamber, and connected to the second end of the connection member. The pushing rod assembly comprises a movable member with a movable contact piece, the movable member being movably disposed in the contact chamber to make the movable contact piece come into contact with or separate from the pair of static contact leading-out terminals. The first magnetizer is disposed at a side of the movable contact piece facing the static contact leading-out terminals.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] FIELD OF THE DISCLOSURE The present invention relates to the field of relay technology, and more particularly to a high voltage direct current relay. [Background technology]

[0002] A relay is an electronic control element 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 the role of automatic adjustment, safety protection, conversion circuit, etc.

[0003] A high voltage DC relay is a type of relay. When the short circuit load is large, the short circuit current generates an electromotive repulsive force in the contacts of the high voltage DC relay, causing the contacts to pop off. The contacts will pop off instantly, and a strong arc will cause the relay to burn out or even explode.

[0004] In the related art, relays are usually provided with a short-circuit-resistant structure to prevent the contacts from popping off, specifically, a magnetic body is provided inside the contact case of the relay, and when an electromotive repulsive force is generated by a short-circuit current, the magnetic body is magnetized to generate an electromagnetic attractive force, which causes the movable contacts to pop off instantly, preventing the relay from burning out or exploding.

[0005] However, in the related art, the connection structure between the magnetic conductive body and the contact container of the relay is irrationally designed, and the connection between the magnetic conductive body and the contact container is not strong, and assembly is not easy. Summary of the Invention

[0006] The embodiments of the present invention provide a relay to solve the problems in the related art that the connection between the magnetic conductive body and the contact can is not strong and not easy to assemble. In an embodiment of the present invention, a relay includes a contact container, a pair of fixed contact pull-out ends, a connecting member, a first magnetic conductive body, and a push rod assembly, the contact container has a contact chamber and a pair of first and second through holes, the first through holes and the second through holes both communicating with the contact chamber, the pair of fixed contact pull-out ends are drilled in a one-to-one correspondence with the pair of first through holes and connected to the contact container, a connecting member is drilled in the second through hole and has a first end and a second end, the first end being connected to the contact container, a first magnetic conductive body is provided within the contact chamber and connected to the second end of the connecting member, the push rod assembly includes a movable member having a movable contact, the movable member is movably provided within the contact chamber so as to bring the movable contact into contact with or away from the pair of fixed contact pull-out ends, and the first magnetic conductive body is provided on the side of the movable contact facing the fixed contact pull-out ends.

[0007] According to some embodiments of the present invention, the second through hole is disposed between the pair of first through holes.

[0008] According to some embodiments of the present invention, the contact vessel includes a yoke plate and an insulating cover; the yoke plate has a third through hole communicating with the contact chamber, the push rod assembly is movably disposed in the third through hole, an insulating cover connected to the yoke plate; The first through hole and the second through hole are formed in the insulating cover, and a first end of the connecting member is connected to an outer surface of the insulating cover.

[0009] In some embodiments of the present invention, the insulating cover includes a top wall and a side wall, one end of the side wall is connected to an outer periphery of the top wall and the other end of the side wall is connected to the yoke plate, and the first through hole and the second through hole are opened in the top wall.

[0010] According to some embodiments of the present invention, the insulating cover includes a ceramic cover and a flange member, the ceramic cover includes a top wall and a side wall, and the side wall is connected to the yoke plate via the flange member; a first metallization layer is provided on an outer surface of the top wall at a periphery located at the first through hole, and a second metallization layer is provided on a periphery located at the second through hole; The fixed contact lead end is welded to the top wall through the first metallization layer, and a first end of the connecting member is welded to the top wall through the second metallization layer.

[0011] According to some embodiments of the present invention, the top wall and the side wall are of one unitary construction, or the top wall and the side wall are of separate construction and connected by welding.

[0012] According to some embodiments of the present invention, the first magnetic conductive body is spaced apart from the inner surface of the top wall.

[0013] According to some embodiments of the present invention, the second end of the connecting member is riveted or welded or glued to the first conductive body.

[0014] According to some embodiments of the present invention, the first magnetic conductive body includes a plurality of stacked magnetic conductive pieces, the plurality of magnetic conductive pieces being connected to the second end of the connection member.

[0015] According to some embodiments of the present invention, the push rod assembly further includes a base, an elastic member, and a limit structure. One end of the elastic member abuts against the base and the other end abuts against the movable member, and the elastic member provides an elastic force such that the movable contact has a tendency to move toward the fixed contact pull-out end; a limit structure connected to the base and the movable member and used to limit a range of movement of the movable member relative to the base, the limit structure including a limit hole and a limit portion that fit together, the limit hole including a first end and a second end that are provided opposite to each other in a moving direction of the movable contact, and the limit portion being movably provided between the first end and the second end of the limit hole, When the movable contact is separated from the fixed contact drawn-out end, the limit portion is located at the first end of the limit hole.

[0016] According to some embodiments of the present invention, the aperture size at the second end is larger than the aperture size at the first end.

[0017] According to some embodiments of the present invention, the limit portion has a first arcuate surface that realizes a limit with the limit hole when the limit portion is positioned at the first end of the limit hole.

[0018] According to some embodiments of the present invention, the movable member further includes a fixed member fixedly connected to the movable contact, and the limit portion is provided on one of the fixed member and the base, and the limit hole is provided on the other of the fixed member and the base.

[0019] One embodiment of the above invention has at least the following advantages or beneficial effects.

[0020] In the relay according to the embodiment of the present invention, the first magnetic conductive body is connected to the contact container without being linked to the push rod assembly, so that the magnetic attraction force of the movable contact to the first magnetic conductive body acts on the contact container via the connecting member, and the position of the contact container is relatively fixed, so that it is possible to avoid the movable contact and the fixed contact lead end from popping off due to insufficient holding force of the push rod assembly, which may cause the relay to burn out or explode. Meanwhile, by providing the connecting member, the first magnetic conductive body is connected to the contact container via the connecting member. The first magnetic conductive body connects the contact container through the connecting member, rather than directly connecting to the contact container, so that the connection process can be visualized without interruption, which makes the operation convenient and ensures the reliability of the connection. [Brief description of the drawings]

[0021] [Figure 1] 1 is a schematic perspective view of a relay according to a first embodiment of the present invention, in which a coil and a magnetic circuit are omitted. [Diagram 2] FIG. 2 is a schematic plan view of FIG. [Diagram 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. 2. [Figure 4] FIG. 2 is an exploded schematic view of FIG. 1. [Diagram 5] FIG. 2 is a schematic side view of the push rod assembly according to the first embodiment of the present invention. [Figure 6] FIG. 6 is an exploded schematic view of FIG. 5. [Figure 7] FIG. 6 is a partial enlarged view of a portion X in FIG. 5. [Figure 8] FIG. 6 is a cross-sectional view taken along line BB in FIG. 5. [Figure 9] FIG. 11 is an exploded schematic view of a push rod assembly according to a second embodiment of the present invention. [Figure 10] FIG. 11 is an exploded schematic view of a push rod assembly according to a third embodiment of the present invention. [Figure 11] FIG. 13 is an exploded schematic view of a push rod assembly according to a fourth embodiment of the present invention. [Figure 12] FIG. 13 is an exploded schematic view of a push rod assembly according to a fifth embodiment of the present invention. [Figure 13] FIG. 6 is an exploded schematic view of a relay according to a second embodiment of the present invention. [Figure 14] FIG. 2 is an exploded schematic view of the relay according to the first embodiment of the present invention. [Figure 15] FIG. 2 is a schematic perspective view of FIG. 1 with an insulating cover omitted. [Figure 16] FIG. 3 is a cross-sectional view of CC in FIG. [Explanation of symbols]

[0022] 10, contact container, 101, contact chamber, 102, first through hole, 103, second through hole, 11a, insulating cover, 11, ceramic cover, 111, top wall, 112, side wall, 113, first metallization layer, 114, second metallization layer, 12, flange member, 13, yoke plate, 131, third through hole, 20, fixed contact lead end, 30, connecting member, 31, first end of connecting member, 32, connecting second end of connecting member, 40, first magnetic conductive body, 41, magnetic conductive piece, 411, aperture, 50, push rod assembly, 51, push rod, 52, base, 521, base portion, 522, first limit member, 523, second limit member, 524, second arcuate surface, 53, movable member, 54, movable contact, 55, second magnetic conductive body, 551, bottom portion, 552, first side portion, 553, second side portion, 554, second limit member, 555, second arcuate surface, 556, movable member, 557, second limit member, 558, second limit member, 559, second limit member, 560, second limit member, 561, second limit member, 562, second limit member, 563, second limit member, 564, second limit member, 565, second limit member, 566, second limit member, 567, second limit member, 568, second limit member, 569, second limit member, 570, second limit member, 571, second limit member, 572, second limit member, 573, second limit member, 574, second limit member, 575, second limit member, 576, second limit member, 577, second limit member, 578, second limit member, 579, second limit member, 580, second limit member, 581, second limit member, 582, second limit member, 583, second limit member, 584, second limit member, 585, second limit member, 586, second limit member, 587, second limit member, 588, second limit member, 589, second limit member, 590, second limit member, 591, second limit member, 592, second limit member, 593, second limit member, 594, second limit member, 595 6, elastic member, 57, limit structure, 571, limit portion, 571a, first arcuate surface, 572, limit hole, 573, first end of limit hole, 574, second end of limit hole, 575, first flat surface, 576, second flat surface, 577, first inclined surface, 578, second inclined surface, 579, rivet, 58, fixing member, 1100, housing, 1110, first case, 1120, second case base, 1130, exposure hole, 1200, electromagnet unit, 1210, coil bobbin, 1220, coil, 1230, fixed iron core, 1231, perforation, 1240, movable iron core, 1250, reset member, 1300, arc-extinguishing unit, 1310, arc-extinguishing magnet, 1320, yoke clamp, 1400, seal unit, 1410, metal cover, D1, movement direction, D2, longitudinal direction, D3, width direction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Next, exemplary embodiments will be described in more detail with reference to the drawings. However, the exemplary embodiments can 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 is comprehensive and complete, and can 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 are omitted.

[0024] As shown in Fig. 14 to Fig. 16, Fig. 14 is an exploded schematic view of a relay in a first embodiment of the present invention. The relay includes a housing 1100, an electromagnet unit 1200, an arc-extinguishing unit 1300, and a seal unit 1400. The seal unit 1400 is provided in the housing 1100, and a top portion of a fixed contact drawn-out end of the seal unit 1400 is exposed to the outer surface of the housing 1100 through an exposure hole 1130 of the housing 1100. The electromagnet unit 1200 and the arc-extinguishing unit 1300 are provided in the housing 1100.

[0025] 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.

[0026] 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.

[0027] 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 of the arc-extinguishing magnets 1310 may be substantially rectangular. The two arc-extinguishing magnets 1310 are provided on both sides of the insulating cover, respectively, and are provided opposite each other along the longitudinal direction D2 of the movable contact.

[0028] By providing two arc-extinguishing magnets 1310 facing each other, a magnetic field can be formed around the fixed contact pull-out end and the movable contact. Therefore, the arc generated between the fixed contact pull-out end and the movable contact is stretched in directions away from each other by the action of the magnetic field, thereby realizing extinguishing the arc.

[0029] 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 can prevent 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 soft magnetic materials. Examples of soft magnetic materials include, but are not limited to, iron, cobalt, nickel, and alloys thereof.

[0030] As shown in Figs. 1 to 4, 15 and 16, Fig. 1 is a perspective schematic diagram of a relay in a first embodiment of the present invention, in which the coil and the magnetic circuit are omitted. Fig. 2 shows a schematic plan view of Fig. 1. Fig. 3 shows a cross-sectional view of AA in Fig. 2. Fig. 4 shows an exploded schematic view of Fig. 1. Fig. 15 shows a perspective schematic diagram in which the insulating cover in Fig. 1 is omitted. Fig. 16 shows a cross-sectional view of CC in Fig. 2.

[0031] The seal unit 1400 according to the embodiment of the present invention includes a contact container 10, a pair of fixed contact pull-out ends 20, a connecting member 30, a first magnetic conductive body 40, and a push rod assembly 50. The contact container 10 has a contact chamber 101, a pair of first through holes 102, and one second through hole 103, and the first through hole 102 and the second through hole 103 are both connected to the contact chamber 101. The pair of fixed contact pull-out ends 20 are connected to the contact container 10 and are drilled in the pair of first through holes 102 in a one-to-one correspondence. The connecting member 30 is drilled in the second through hole 103 and includes a first end 31 and a second end 32, and the first end 31 is connected to the container wall of the contact container 10. The first magnetic conductive body 40 is provided in the contact chamber 101 and is connected to the second end 32 of the connecting member 30. The push rod assembly 50 includes a movable member 53 having a movable contact 54, the movable member 53 being movably disposed within the contact chamber 101 so as to bring the movable contact 54 into contact with or separate from a pair of fixed contact pull-out ends 20 (fixed contacts), and the first magnetic conductive body 40 is disposed on the side where the movable contact 54 faces the fixed contact pull-out ends 20.

[0032] In the relay according to the embodiment of the present invention, the first magnetic conductive body 40 is provided above (on the upper side of) the movable contactor 54, and when both ends of the movable contactor 54 contact the pair of fixed contact lead-out ends 20, a current passes through the movable contactor 54, forming a magnetic conductive circuit surrounding the movable contactor 54 on the outer periphery in the longitudinal direction D2 of the movable contactor 54. Due to the presence of the first magnetic conductive body 40, most of the magnetic field of the magnetic conductive circuit is concentrated in the first magnetic conductive body 40, magnetizing the first magnetic conductive body 40. Thus, a magnetic attractive force is generated between the first magnetic conductive body 40 and the movable contactor 54 through which current flows, along the pressure direction of the contacts. This magnetic attractive force opposes the electric repulsive force due to the short-circuit current between the movable contactor 54 and the fixed contact lead-out ends 20, and ensures that the movable contactor 54 and the fixed contact lead-out ends 20 do not bounce.

[0033] In addition, the first magnetic conductive body 40 is connected to the contact container 10 through the connecting member 30, and the magnetic attraction force of the movable contact 54 to the first magnetic conductive body 40 acts on the contact container 10 through the connecting member 30 without being linked to the push rod assembly 50, and the position of the contact container 10 is relatively fixed, so that the movable contact 54 and the fixed contact lead end 20 can be prevented from popping off due to insufficient holding force of the push rod assembly 50, and the relay can be prevented from burning out or exploding. Meanwhile, a second through hole 103 is opened in the contact container 10, and the connecting member 30 is drilled in the second through hole 103, so that the connecting member 30 is connected to the contact container 10 and the first magnetic conductive body 40 is connected to the connecting member 30. The first magnetic conductive body 40 is connected to the contact container 10 through the connecting member 30, but is not directly connected to the contact container 10, so that the connection process can be visualized without being interrupted, the operation is easy, and the reliability of the connection can be ensured.

[0034] Furthermore, the movable member 53 further includes a second magnetic conductive body 55 arranged in the contact chamber 101, the second magnetic conductive body 55 is fixedly connected to the movable contactor 54, the second magnetic conductive body 55 is located on the side where the movable contactor 54 faces 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.

[0035] When both ends of the movable contact 54 contact the pair of fixed contact pull-out ends 20, the second magnetic conductive body 55 moving together with the movable contact 54 approaches or contacts the first magnetic conductive body 40, thereby forming a magnetic circuit surrounding the movable contact 54 between the first magnetic conductive body 40 and the second magnetic conductive body 55. When a short-circuit current passes through the movable contact 54, a magnetic attraction force is generated between the first magnetic conductive body 40 and the second magnetic conductive body 55 along the pressure direction of the contacts, and this magnetic attraction force resists 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.

[0036] Furthermore, the first magnetic conductive body 40 and the second magnetic conductive body 55 are located on both sides of the movable contact 54, respectively. When the movable contact 54 is energized, the magnetic attraction force between the first magnetic conductive body 40 and the second magnetic conductive body 55 is a direct electromagnetic attraction force, which is greater than the magnetic attraction force between the first magnetic conductive body 40 and the movable contact 54 after only the first magnetic conductive body 40 is magnetized, so that it can better resist the electromotive repulsive force caused by the short-circuit current between the movable contact 54 and the fixed contact pull-out end 20, effectively improving the short-circuit resistance capability.

[0037] As shown in Figure 16, when both ends of the movable contact 54 and a pair of fixed contact pull-out ends 20 are turned off, no current flows through the movable contact 54, and therefore no magnetic attraction force is generated between the first magnetic conductive body 40 and the second magnetic conductive body 55.

[0038] It should be noted that the terms "including" and "having" in the embodiments of the present invention are intended to cover non-exclusive inclusion and mean any variations thereof, for example, a process, method, system, product or device that includes 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.

[0039] The contact container 10 includes a yoke plate 13 and an insulating cover 11a, and the insulating cover 11a covers the side of the yoke plate 13 to form a contact chamber 101 of the contact container 10. In one embodiment, the insulating cover 11a includes a top wall and a side wall, and a first through hole 102 and a second through hole 103 are formed in the top wall. The yoke plate 13 has a third through hole 131 communicating with the contact chamber 101, and the push rod assembly 50 is movably mounted in the third through hole 131. Two yoke clamps 1320 surround the insulating cover 11a.

[0040] 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 of a metal part having an annular structure such as an iron-nickel alloy, and one end of the flange member 12 is connected to the opening edge of the ceramic cover 11 by laser welding, brazing, resistance welding, adhesion, etc. The other end of the flange member 12 is connected to the yoke plate 13, and may be similarly laser welding, brazing, resistance welding, adhesion, etc. The flange member 12 is provided between the ceramic cover 11 and the yoke plate 13, which can facilitate the connection between the ceramic cover 11 and the yoke plate 13.

[0041] Two arc-extinguishing magnets 1310 are positioned on either side of the ceramic cover 11 , and two yoke clamps 1320 surround the ceramic cover 11 and the two arc-extinguishing magnets 1310 .

[0042] The ceramic cover 11 includes a top wall 111 and a side wall 112, one end of the side wall 112 is surrounded by the outer periphery of the top wall 111, and the other end of the side wall 112 is connected to the yoke plate 13 via a flange member 12. The first through hole 102 and the second through hole 103 are both opened in the top wall 111, and the first end 31 of the connecting member 30 is connected to the outer surface of the top wall 111.

[0043] One of the pair of fixed contact drawn ends 20 functions as a terminal for current inflow, and the other functions as a terminal for current outflow. The fixed contact drawn end 20 is drilled in the first through-hole 102, and a portion of the fixed contact drawn end 20 advances into the contact chamber 101 to contact or separate from the movable contactor 54. A portion of the fixed contact drawn end 20 is exposed on the outer surface of the ceramic cover 11.

[0044] The bottom of the fixed contact pull-out end 20 can be a fixed contact, and both ends of the movable contactor 54 in the longitudinal direction D2 can be movable contacts. The movable contacts at both ends of the movable contactor 54 can protrude from other parts of the movable contactor 54 or can be aligned with other parts.

[0045] In addition, the fixed contact may be provided integrally or separately at the bottom of the fixed contact pull-out end 20, and the movable contact may be provided integrally or separately at both ends of the movable contactor 54 in the longitudinal direction D2.

[0046] The second through hole 103 may be provided between two first through holes 102, that is, the connection member 30 may be provided between a pair of fixed contact pull-out ends 20. The number of the second through holes 103 may be one or more. In this embodiment, the number of the second through holes 103 is two, but is not limited thereto.

[0047] Correspondingly, the number of the connecting members 30 may be one or more. In this embodiment, the number of the connecting members 30 is two, but is not limited thereto.

[0048] 4, the outer surface of the top wall 111 of the ceramic cover 11 is provided with a first metallization layer 113 on the periphery located at the first through hole 102, and a second metallization layer 114 on the periphery located at the second through hole 103. The fixed contact lead-out end 20 is welded to the top wall 111 via the first metallization layer 113, and the first end 31 of the connection member 30 is welded to the top wall 111 via the second metallization layer 114.

[0049] The outer surface of the top wall 111 of the ceramic cover 11 is easier to form a welded flat surface than the inner surface of the ceramic cover 11. In addition, the fixed contact lead end 20 must be provided on the top wall 111 of the ceramic cover 11, and a metallized layer must be provided on the periphery of the first through hole 102 when the fixed contact lead end 20 is welded to the top wall 111. Therefore, when processing the first metallized layer 113 of the first through hole 102, the second metallized layer 114 of the second through hole 103 is processed at the same time. Therefore, by welding the connection member 30 to the outer surface of the top wall 111 of the ceramic cover 11, it is possible to process the metallized layer only on the outer surface of the top wall 111 without the need to process the metallized layer on the inner surface of the top wall 111, which makes processing easy and simplifies the processing steps.

[0050] The first magnetic conductive body 40 is provided at a distance from the inner surface of the top wall 111. That is, the length of the connecting member 30 is greater than the sum of the thicknesses of the top wall 111 and the first magnetic conductive body 40, so that the first magnetic conductive body 40 is suspended from the top wall 111 of the ceramic cover 11 via the connecting member 30.

[0051] The first magnetic conductive body 40 is provided at a distance from the inner surface of the top wall 111 so as to have a gap between the first magnetic conductive body 40 and the inner surface of the top wall 111. Since the first magnetic conductive body 40 is not in direct contact with the inner surface of the top wall 111, it does not affect the creepage distance between the pair of fixed contact lead-out ends 20.

[0052] 3 and 4, the first magnetic conductive body 40 includes a plurality of stacked magnetic conductive pieces 41 connected to the second end 32 of the connecting member 30. An opening 411 is formed in each of the magnetic conductive pieces 41, and the connecting member 30 is drilled into the opening 411 and riveted (fastened) to the magnetic conductive piece 41 located at the lowermost position (lower side).

[0053] Of course, when the first magnetic conductive body 40 includes a plurality of stacked magnetic conductive pieces 41, the opening 411 of the lowest magnetic conductive piece 41 may be a blind hole (blind hole), and the openings 411 of the remaining magnetic conductive pieces 41 may be through holes. The connecting member 30 is drilled in each opening 411 of the remaining magnetic conductive pieces 41, and the second end of the connecting member 30 enters the blind hole of the lowest magnetic conductive piece 41 and is welded to this magnetic conductive piece 41.

[0054] Furthermore, when the first magnetic conductive body 40 is one piece, an opening 411 is provided in the first magnetic conductive body 40, and the opening 411 may be a through hole or a blind hole. When the opening 411 is a through hole, the connection member 30 is riveted (fastened) to the first magnetic conductive body 40 after passing through the opening 411. When the opening 411 is a blind hole, solder is provided in the blind hole, and the second end 32 of the connection member 30 may enter the blind hole and be welded to the first magnetic conductive body 40.

[0055] For example, when the short-circuit current is 10 kA or more, it is necessary to increase the thickness of the first magnetic conductive body 40 in order to generate a larger magnetic attractive force, and further, it is necessary to make it possible for the magnetic attractive force between the first magnetic conductive body 40 and the second magnetic conductive body 55 to overcome the repulsive force caused by the short-circuit current and prevent the movable contact 54 from popping off the fixed contact lead-out end 20. However, a thick first magnetic conductive body 40 increases the cost and makes it difficult to connect it to the ceramic cover 11.

[0056] In this embodiment, the first magnetic conductive body 40 is connected to the contact vessel 10 via the connecting member 30, so that the first magnetic conductive body 40 can include a plurality of stacked magnetic conductive pieces 41, and the plurality of magnetic conductive pieces 41 can be connected to the contact vessel 10 by drilling the openings 411 through the connecting member 30, and the overall thickness of the first magnetic conductive body 40 can be increased by increasing the number of thin magnetic conductive pieces 41. The magnetic conductive pieces 41 are thin and can be made of thin materials, so that the material cost is low and the operation is easy. Meanwhile, the number of magnetic conductive pieces 41 can be flexibly adjusted according to the magnitude of the short-circuit current.

[0057] The top wall 111 and the side wall 112 of the ceramic cover 11 may be separate structures or may be connected by welding. By designing the ceramic cover 11 as a structure in which the top wall 111 and the side wall 112 are separate structures, the connection between the connection member 30 and the top wall 111 becomes easier. Of course, the top wall 111 and the side wall 112 may be connected by adhesion.

[0058] Specifically, because the top wall 111 is in a sheet shape, it is easier to process the first through hole 102, the second through hole 103, the first metallization layer 113, and the second metallization layer 114 on the top wall 111. Furthermore, the sheet-like structure also makes it easier to weld the connection member 30 to the top wall 111, and the fixed contact lead-out end 20 to the top wall 111.

[0059] Of course, the top wall 111 and the side wall 112 of the ceramic cover 11 may be of an integral structure.

[0060] The method of connecting the second end 32 of the connecting member 30 and the first magnetic conductive body 40 may be various embodiments such as welding, riveting, adhesive bonding, and the like.

[0061] In this embodiment, the second end 32 of the connection member 30 is riveted to the first magnetic conductive body 40. Specifically, the second end 32 of the connection member 30 and the first magnetic conductive body 40 are connected by an expansion rivet method.

[0062] The first magnetic conductive body 40 may be straight-shaped, and the second magnetic conductive body 55 may be U-shaped. The first magnetic conductive body 40 and the second magnetic conductive body 55 may be made of materials such as iron, cobalt, nickel, and alloys thereof.

[0063] Of course, it will be understood that the second magnetic conductive body 55 may include a plurality of stacked magnetic conductive pieces, or the second magnetic conductive body 55 may include a plurality of U-shaped magnetic conductive bodies arranged side by side.

[0064] 14 and 16, 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 covers the third through hole 131 on the yoke plate 13. The metal cover 1410 and the yoke plate 13 are surrounded as a chamber for accommodating the fixed core 1230 and the movable core 1240 of the electromagnet unit 1200, and are described in detail below. 4 and 16, the push rod assembly 50 further includes a push rod 51, a base 52, and an elastic member 56. The push rod 51 is movably disposed in the third through hole 131 of the yoke plate 13. One end of the push rod 51 is connected to the base 52, and the other end of the push rod 51 is connected to the movable iron core 1240 of the electromagnet unit 1200. One end of the elastic member 56 abuts against the base 52, and the other end of the elastic member 56 abuts against the movable member 53, and the elastic member 56 provides an elastic force such that the movable contact 54 tends to move to the fixed contact pull-out end 20.

[0065] The elastic member 56 may be a spring, but is not limited to this.

[0066] Of course, in other embodiments, the push rod assembly 50 may have other configurations, not all of which are recited here.

[0067] As shown in FIG. 16, 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. The metal cover 1410 is provided inside the coil bobbin 1210. The coil 1220 surrounds the coil bobbin 1210. The fixed core 1230 is fixed inside the metal cover 1410, and a part of the fixed core 1230 enters the third through hole 131. The fixed core 1230 has a hole 1231, which is provided corresponding to the position of the third through hole 131 and is for providing the push rod 51. The movable core 1240 is movably provided within the metal cover 1410 and is provided opposite the fixed core 1230. The movable core 1240 is connected to the push rod 51 and is used to be attracted to the fixed core 1230 when the coil 1220 is energized. The movable core 1240 and the push rod 51 can be connected by screwing, riveting, welding, or other methods.

[0068] The reset member 1250 is located inside the metal cover 1410, and is disposed between the fixed core 1230 and the movable core 1240, and is used to reset the movable 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.

[0069] As shown in Figures 5 to 8, Figure 5 shows a schematic side view of a push rod assembly 50 according to a first embodiment of the present invention. Figure 6 shows an exploded schematic view of Figure 5. Figure 7 shows a partially enlarged view of X in Figure 5. Figure 8 shows a cross-sectional view of BB in Figure 5.

[0070] The push rod assembly 50 further includes a limit structure 57, which is connected to the base 52 and the movable member 53 and is used to limit the range of movement of the movable member 53 relative to the base 52. The limit structure 57 includes a limit hole 572 and a limit portion 571 that fit together, the limit hole 572 includes a first end 573 and a second end 574 that are provided opposite to each other along the moving direction D1 of the movable contact 54, the hole diameter of the second end 574 is larger than the hole diameter of the first end 573, and the limit portion 571 is movably drilled between the first end 573 and the second end 574 of the limit hole 572. When the movable contact 54 is separated from the fixed contact pull-out end 20, the limit portion 571 is located at the first end 573 of the limit hole 572.

[0071] In this embodiment, the base 52 is directly connected to the movable member 53 via the limit structure 57, which makes the assembly between the base and the movable member 53 easier. Also, since there is no other member above the movable member 53, movement interference between the other member and the first magnetic conductive body 40 during overtravel is avoided.

[0072] The limit hole 572 may be a through hole or a blind hole.

[0073] When the movable contact 54 is not in contact with the fixed contact pull-out end 20, the elastic member 56 causes the limit portion 571 to be located at the first end 573 of the limit hole 572. When the movable contact 54 comes in contact with the fixed contact pull-out end 20 and the over-travel is completed, the limit portion 571 moves from the first end 573 to the second end 574 of the limit hole 572. Since the hole diameter of the second end 574 of the limit hole 572 is larger than the hole diameter of the first end 573, the limit hole 572 has a structure in which one end is large and the other end is small. During the over-travel process, the gap between the limit portion 571 and the hole wall of the limit hole 572 becomes large, and friction and jamming (clogging) can be prevented between the limit portion 571 and the hole wall of the limit hole 572 during the movement of the movable contact 54 relative to the base 52. At the same time, the hole diameter of the first end 573 of the limit hole 572 is small, which does not affect the initial engagement between the limit portion 571 and the limit hole 572 and prevents the movable contact 54 from swinging relative to the base 52.

[0074] In addition, in the initial state, in order to realize the limit of the movable contact 54 and the base 52, the size of the hole diameter of the first end 573 of the limit hole 572 should be compatible with the shape of the limit portion 571 so that the limit portion 571 can realize a limit with the hole wall of the limit hole 572 when the limit portion 571 is positioned at the first end 573 of the limit hole 572.

[0075] 5 to 8, the diameter of limit hole 572 gradually increases from first end 573 to second end 574 of limit hole 572. During overtravel, as limit portion 571 moves from first end 573 to second end 574 of limit hole 572, the gap between limit portion 571 and the hole wall of limit hole 572 gradually increases.

[0076] Furthermore, the hole wall of the limit hole 572 includes a first plane 575 and a second plane 576 arranged opposite each other, and a first inclined surface 577 and a second inclined surface 578 arranged opposite each other, one ends of the first inclined surface 577 and the second inclined surface 578 are connected to both ends of the first plane 575, and the other ends of the first inclined surface 577 and the second inclined surface 578 are connected to both ends of the second plane 576.

[0077] In this embodiment, the shape of the limit hole 572 is a substantially isosceles trapezoid, but is not limited thereto. For example, the shape of the limit member hole 572 may be a normal trapezoid in which the inclinations of the first inclined surface 577 and the second inclined surface 578 are not equal. Alternatively, the shape of the limit member hole 572 may be a triangle, preferably an isosceles triangle.

[0078] Of course, in other embodiments, the diameter of the limit hole 572 does not have to gradually increase along the direction from the first end 573 to the second end 574 of the limit hole 572, and for example, the wall of the limit hole 572 may include a constant diameter step and an expanded diameter step. For example, from the first end 573 to the second end 574, the wall of the limit hole 572 may include an expanded diameter step, a constant diameter step, an expanded diameter step, a constant diameter step, and so on, in that order.

[0079] As shown in FIG. 7, the limit portion 571 has a first arcuate surface 571a, which is used to realize a limit with the hole wall of the limit hole 572 when the limit portion 571 is positioned at the first end 573 of the limit hole 572.

[0080] In this embodiment, by designing the outer wall of the limit portion 571 to include the first arcuate surface 571a so that there is line contact between the first arcuate surface 571a and the wall of the limit hole 572, the line contact reduces the frictional force between the limit portion 571 and the wall of the limit hole 572. When relative movement occurs between the limit portion 571 and the limit hole 572, jamming is less likely to occur.

[0081] The base 52 is provided with a limit member hole 572, and the movable member 53 includes a limit portion 571. Of course, in other embodiments, the limit hole 572 may be provided in the movable member 53, and the limit portion 571 may be provided in the base 52.

[0082] As shown in Figs. 5 to 8, in this embodiment, a limit hole 572 is provided in the base 52, and a limit portion 571 is provided in the second magnetic conductive body 55. The second magnetic conductive body 55 includes a bottom portion 551, a first side portion 552, and a second side portion 553. The first side portion 552 and the second side portion 553 are connected to both ends of the bottom portion 551 along the width direction D3 of the movable contactor 54. The first side portion 552 and the second side portion 553 are provided on two opposing sides of the width direction D3 of the movable contactor 54. The limit portion 571 is provided in both the first side portion 552 and the second side portion 553.

[0083] The moving direction D1, the longitudinal direction D2, and the width direction D3 are perpendicular to each other.

[0084] The base 52 includes a base portion 521, and a first limit member 522 and a second limit member 523 connected to the base portion 521 and arranged opposite each other, with a first side portion 552 arranged opposite the first limit member 522 and a second side portion 553 arranged opposite the second limit member 523, and both the first limit member 522 and the second limit member 523 having limit holes 572 formed therein.

[0085] The surface of the first limit member 522 facing the first side portion 552 and the surface of the second limit member 523 facing the second side portion 553 include a second arcuate surface 524 .

[0086] In this embodiment, the first limit member 522 is designed to include a second arcuate surface 524 on a side surface facing the first side portion 552, and the second limit member 523 is designed to include a second arcuate surface 524 on a side surface facing the second side portion 553, and the two second arcuate surfaces 524 are in line contact with the first side portion 552 and the second side portion 553, respectively, thereby reducing the frictional force between the first side portion 552 and the first limit member 522, and between the second side portion 553 and the second limit member 523. When the second magnetic conductive body 55 moves relative to the base 52, jamming is less likely to occur. In addition, it is possible to avoid the generation of debris to contaminate the contact chamber 101 of the relay.

[0087] A first side portion 552 and a second side portion 553 are located between the first limit member 522 and the second limit member 523. Limit portions 571 are protrudingly provided on both the side where the first side portion 552 is separated from the second side portion 553 and the side where the second side portion 553 is separated from the first side portion 552.

[0088] As an example, the limit portion 571 can be formed by pressing the side surfaces of the first side portion 552 / second side portion 553 to form a punch structure for the limit portion 571. The specific positions of the punch structures on the first side portion 552 / second side portion 553 can be flexibly adjusted according to the structure.

[0089] In this embodiment, the two limit portions 571 are respectively protruded on the side where the first side portion 552 moves away from the second side portion 553 and the side where the second side portion 553 moves away from the first side portion 552, so that the first side portion 552 and the second side portion 553 can be in sufficient contact with the first limit member 522 and the second limit member 523, respectively, and further, stability is ensured between the second magnetic conductive body 55 and the base 52 when limited, without affecting the magnetic conductivity efficiency.

[0090] In one embodiment, the limit portion 571 may be elongated. When the limit portion 571 is positioned at the first end 573 of the limit hole 572, the elongated side surface having a large area contacts the wall of the limit hole 572. By bringing the surface having a large area of ​​the limit portion 571 into contact with the wall of the limit hole 572, it is possible to effectively prevent the movable contactor 54 from swinging relative to the base 52 in the initial state, and to reduce the probability of the movable contactor 54 bouncing and springing back.

[0091] As shown in Fig. 9, Fig. 9 shows an exploded schematic view of a push rod assembly 50 according to a second embodiment of the present invention. The second embodiment is similar to the first embodiment described above, so a description thereof will be omitted, but the differences are as follows.

[0092] The limit portion 571 includes two convex hull structures. The two convex hull structures are spaced apart along the longitudinal direction D2 of the movable contact 54. The design of the double convex hull structure effectively prevents the movable contact 54 from swinging relative to the base 52 in the initial state, and reduces the probability of the movable contact 54 bouncing and springing back.

[0093] As shown in Fig. 10, Fig. 10 is an exploded schematic view of a push rod assembly 50 according to a third embodiment of the present invention. Explanation of the similarities between the third embodiment and the above-mentioned first embodiment will be omitted, but the differences are as follows.

[0094] The limit portion 571 is a rivet 579 , and the rivet 579 is riveted to the first side portion 552 / the second side portion 553 of the second magnetic conductive body 55 .

[0095] As shown in Fig. 11, Fig. 11 is an exploded schematic view of a push rod assembly 50 in a fourth embodiment of the present invention. Explanation of the similarities between the fourth embodiment and the above-mentioned first embodiment will be omitted, but the difference is that a limit portion 571 is provided at the bottom portion 551 of the second magnetic conductive body 55.

[0096] Specifically, the second magnetic conductive body 55 includes a bottom portion 551, a first side portion 552, and a second side portion 553. Limit portions 571 are protruded from two opposing sides of the bottom portion 551 along the width direction D3 of the movable contact 54. The first side portion 552 and the second side portion 553 are respectively connected to both ends of the bottom portion 551 along the width direction D3 of the movable contact 54. The first side portion 552 and the second side portion 553 are respectively provided on two opposing sides of the movable contact 54 in the width direction D3.

[0097] The base 52 includes a base 521, and a first limit member 522 and a second limit member 523 connected to the base 521 and arranged opposite each other, and both the first limit member 522 and the second limit member 523 have limit holes 572 formed therein.

[0098] As shown in Fig. 12, Fig. 12 is an exploded schematic view of a push rod assembly 50 according to the fifth embodiment of the present invention. Explanation of the similarities between the fifth embodiment and the first embodiment will be omitted, but the differences are as follows.

[0099] The base 52 includes a base portion 521, and a first limit member 522 and a second limit member 523 connected to the base portion 521 and disposed opposite each other, and the first limit member 522 and the second limit member 523 each have a limit hole 572. The movable member 53 further includes a fixed member 58 fixedly connected to the second magnetic conductive body 55, and limit portions 571 are provided on both sides of the fixed member 58.

[0100] As shown in Fig. 13, Fig. 13 is an exploded schematic diagram of a relay in the second embodiment of the present invention. Explanation of the similarities between the relay in the second embodiment and the relay in the first embodiment will be omitted, but the differences are as follows.

[0101] The limit portions 571 are provided to protrude from two opposing side edges of the base 52 of the push rod assembly 50. The movable member 53 further includes a fixed member 58 fixedly connected to the movable contact 54 and the second magnetic conductive body 55, and the fixed member 58 is provided with a limit hole 572.

[0102] The fixing member 58 has an inverted U-shape, and the positions of a first end 573 and a second end 574 of a limit hole 572 provided in the fixing member 58 are opposite to those of the limit hole 572 in the above-described embodiment.

[0103] Specifically, as shown in FIG. 13, a first end 573 of the limit hole 572 is located downward, a second end 574 is located upward, and the hole diameter of the second end 574 is larger than the hole diameter of the first end 573.

[0104] As shown in FIGS. 9 to 12, a first end 573 of the limit hole 572 is located at an upper position, and a second end 574 is located at a lower position.

[0105] In the related art, in order to prevent the contact of the relay from being popped off by the short circuit current, an interlocking type short circuit resistant ring electromagnetic structure is usually installed, specifically, a first magnetic body and a second magnetic body are installed in the push rod assembly of the relay, and when the short circuit current generates an electro-mechanical repulsive force, the first magnetic body generates an electromagnetic attractive force to the second magnetic body, which fixes the second magnetic body to the movable contact, ensuring that the movable contact will not pop off.

[0106] However, the push rod assembly needs to be supported by the holding force of the movable core, but this holding force is held by the electromagnetic force generated by the coil current, so the power consumption of the coil is limited, the holding force is also limited, and the holding force for supporting the short circuit prevention ring is also limited. Therefore, when the short circuit current reaches a certain value, the second magnetic body also has an electromagnetic attraction force to the first magnetic body, and if the holding force of the movable core cannot support the electromagnetic attraction force of the second magnetic body to the first magnetic body, the contact will still pop out. Furthermore, in the related art, the holding force of the movable core is increased by making the coil larger, but making the coil larger also increases the volume of the relay.

[0107] Therefore, the embodiment of the present invention also provides a relay to improve the short circuit current resistance performance of the relay and avoid the relay from burning or exploding due to strong arc action.

[0108] A relay according to an embodiment of the present invention includes a contact can, a pair of fixed contact lead-out ends, a connecting member, a first magnetic conductive body, and a push rod assembly, the contact can has a contact chamber, a pair of first through holes and one second through hole, the first through hole and the second through hole are both connected to the contact chamber, the pair of fixed contact lead-out ends are drilled in the pair of first through holes in a one-to-one correspondence and connected to the contact can, the connecting member is drilled in the second through hole and has a first end and a second end, the first end is connected to the contact can, the first magnetic conductive body is disposed in the contact chamber, and connected to the second end of the connecting member, the push rod assembly includes a movable contact and a second conductive body fixedly connected to the movable contact, the movable contact is provided in the contact chamber and is used to contact or separate from a pair of the fixed contact pull-out ends, the first conductive body is provided on the side where the movable contact faces the fixed contact pull-out ends, the second conductive body is provided in the contact chamber and is located on the side where the movable contact faces the first conductive body, and the second conductive body is used to form a conductive circuit with the first conductive body.

[0109] According to some embodiments of the present invention, the second through hole is disposed between the pair of first through holes.

[0110] According to some embodiments of the present invention, the contact vessel includes a yoke plate and an insulating cover; the yoke plate has a third through hole communicating with the contact chamber, the push rod assembly is movably disposed in the third through hole, an insulating cover connected to the yoke plate; The first through hole and the second through hole are formed in the insulating cover, and a first end of the connecting member is connected to an outer surface of the insulating cover.

[0111] In some embodiments of the present invention, the insulating cover includes a top wall and a side wall, one end of the side wall is connected to an outer periphery of the top wall and the other end of the side wall is connected to the yoke plate, and the first through hole and the second through hole are opened in the top wall.

[0112] According to some embodiments of the present invention, the insulating cover includes a ceramic cover and a flange member, the ceramic cover includes a top wall and a side wall, and the side wall is connected to the yoke plate via the flange member; a first metallization layer is provided on an outer surface of the top wall at a periphery located at the first through hole, and a second metallization layer is provided on a periphery located at the second through hole; The fixed contact lead end is welded to the top wall through the first metallization layer, and a first end of the connecting member is welded to the top wall through the second metallization layer.

[0113] According to some embodiments of the present invention, the top wall and the side wall are of unitary construction, or the top wall and the side wall are of separate construction.

[0114] According to some embodiments of the present invention, the first magnetic conductive body is spaced apart from the inner surface of the top wall.

[0115] According to some embodiments of the present invention, the second end of the connecting member is riveted or welded or glued to the first conductive body.

[0116] According to some embodiments of the present invention, the first magnetic conductive body includes a plurality of stacked magnetic conductive pieces, the plurality of magnetic conductive pieces being connected to the second end of the connection member.

[0117] According to some embodiments of the present invention, the push rod assembly further includes a base, an elastic member, and a limit structure. one end of the elastic member abuts against the base, and the other end abuts against a movable member constituted by the movable contact and the second magnetic conductive body, the elastic member providing an elastic force such that the movable contact has a tendency to move to the fixed contact pull-out end; a limit structure connected to the base and the movable member and used to limit a range of movement of the movable member relative to the base, the limit structure including a limit hole and a limit portion that fit together, the limit hole including a first end and a second end that are provided opposite to each other in a moving direction of the movable contact, and the limit portion being movably provided between the first end and the second end of the limit hole, When the movable contact is separated from the fixed contact drawn-out end, the limit portion is located at the first end of the limit hole.

[0118] According to some embodiments of the present invention, the aperture size at the second end is larger than the aperture size at the first end.

[0119] According to some embodiments of the present invention, the limit portion has a first arcuate surface, and the first arcuate surface is used to realize the limit hole and the limit when the limit portion is located at the first end of the limit hole.

[0120] According to some embodiments of the present invention, the limit portion is a rivet, the rivet being riveted to the second magnetic conductive body.

[0121] According to some embodiments of the present invention, the movable member further includes a fixed member fixedly connected to the second magnetic body, the limit portion being provided on one of the fixed member and the base, and the limit hole being provided on the other of the fixed member and the base.

[0122] One embodiment of the above invention has at least the following advantages or beneficial effects.

[0123] In the relay according to the embodiment of the present invention, a connecting member is provided, and the first magnetic conductive body is connected to the contact container through the connecting member. The first magnetic conductive body is connected to the contact container without being linked to the push rod assembly, so that the magnetic attraction force of the second magnetic conductive body to the first magnetic conductive body acts on the contact container through the connecting member, and the position of the contact container is relatively fixed, so that the movable contact and the fixed contact lead end are prevented from popping off due to the insufficient holding force of the push rod assembly, which causes the relay to burn out or explode. Meanwhile, a second through hole is opened in the contact container, and the connecting member is drilled into the second through hole, which further realizes the connection between the connecting member and the contact container, and realizes the connection between the first magnetic conductive body and the connecting member. The first magnetic conductive body connects the contact container through the connecting member, and is not directly connected to the contact container, so that the connection process can be visualized without being blocked, which makes the operation convenient and ensures the reliability of the connection.

[0124] The following will explain in detail with reference to the drawings.

[0125] As shown in Fig. 14 to Fig. 16, Fig. 14 is an exploded schematic view of a relay in a first embodiment of the present invention. The relay includes a housing 1100, an electromagnet unit 1200, an arc-extinguishing unit 1300, and a seal unit 1400. The seal unit 1400 is provided in the housing 1100, and a top portion of a fixed contact drawn-out end of the seal unit 1400 is exposed to the outer surface of the housing 1100 through an exposure hole 1130 of the housing 1100. The electromagnet unit 1200 and the arc-extinguishing unit 1300 are provided in the housing 1100.

[0126] 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.

[0127] 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.

[0128] 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 of the arc-extinguishing magnets 1310 may be substantially rectangular. The two arc-extinguishing magnets 1310 are provided on both sides of the insulating cover, respectively, and are provided opposite each other along the longitudinal direction D2 of the movable contact.

[0129] By providing two arc-extinguishing magnets 1310 facing each other, a magnetic field can be formed around the fixed contact drawn-out end and the movable contact. Therefore, the arc generated between the fixed contact drawn-out end and the movable contact is stretched away from each other by the action of the magnetic field, thereby realizing extinguishing the arc.

[0130] 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 can prevent 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 soft magnetic materials. Examples of soft magnetic materials include, but are not limited to, iron, cobalt, nickel, and alloys thereof.

[0131] As shown in Figs. 1 to 4, 15 and 16, Fig. 1 is a perspective schematic diagram of a relay in a first embodiment of the present invention, in which the coil and the magnetic circuit are omitted. Fig. 2 shows a schematic plan view of Fig. 1. Fig. 3 shows a cross-sectional view of AA in Fig. 2. Fig. 4 shows an exploded schematic view of Fig. 1. Fig. 15 shows a perspective schematic diagram in which the insulating cover in Fig. 1 is omitted. Fig. 16 shows a cross-sectional view of CC in Fig. 2.

[0132] The seal unit 1400 according to the embodiment of the present invention includes a contact container 10, a pair of fixed contact pull-out ends 20, a connecting member 30, a first magnetic conductive body 40, and a push rod assembly 50. The contact container 10 has a contact chamber 101, a pair of first through holes 102, and one second through hole 103, and the first through hole 102 and the second through hole 103 are both connected to the contact chamber 101. The pair of fixed contact pull-out ends 20 are connected to the contact container 10 and are drilled in the pair of first through holes 102 in a one-to-one correspondence. The connecting member 30 is drilled in the second through hole 103 and includes a first end 31 and a second end 32, and the first end 31 is connected to the container wall of the contact container 10. The first magnetic conductive body 40 is provided in the contact chamber 101 and is connected to the second end 32 of the connecting member 30. The push rod assembly 50 includes a movable contact 54 and a second conductive body 55 fixedly connected to the movable contact 54, the movable contact 54 is provided in the contact chamber 101 and is used to contact or move away from the pair of fixed contact pull-out ends 20, the first conductive body 40 is provided on the side where the movable contact 54 faces the fixed contact pull-out end 20, the second conductive body 55 is provided in the contact chamber 101 and is located on the side where the movable contact 54 faces away from the first conductive body 40, and the second conductive body 55 is used to form a conductive circuit with the first conductive body 40.

[0133] In the relay according to the embodiment of the present invention, the movable contact 54 is provided between the first magnetic conductive body 40 and the second magnetic conductive body 55. When both ends of the movable contact 54 contact the pair of fixed contact lead ends 20, the second magnetic conductive body 55 moving together with the movable contact 54 approaches or contacts the first magnetic conductive body 40, forming a magnetic circuit surrounding the movable contact 54 between the first magnetic conductive body 40 and the second magnetic conductive body 55. When a short-circuit current passes through the movable contact 54, a magnetic attraction force is generated between the first magnetic conductive body 40 and the second magnetic conductive body 55 along the pressure direction of the contacts. This magnetic attraction force resists the electric repulsive force caused by the short-circuit current between the movable contact 54 and the fixed contact lead end 20, ensuring that the movable contact 54 and the fixed contact lead end 20 do not bounce off.

[0134] As shown in Figure 16, when both ends of the movable contact 54 and a pair of fixed contact pull-out ends 20 are turned off, no current flows through the movable contact 54, and therefore no magnetic attraction force is generated between the first magnetic conductive body 40 and the second magnetic conductive body 55.

[0135] In the relay according to the embodiment of the present invention, the first magnetic conductive body 40 is connected to the contact container 10 through the connection member 30 by providing the connection member 30. The first magnetic conductive body 40 is connected to the contact container 10 without being linked to the push rod assembly 50, and the magnetic attraction force of the second magnetic conductive body 55 to the first magnetic conductive body 40 acts on the contact container 10 through the connection member 30, and the position of the contact container 10 is relatively fixed, so that it is possible to avoid the movable contact 54 and the fixed contact lead end 20 from being popped due to insufficient holding force of the push rod assembly 50, which causes the relay to burn out or explode. Meanwhile, a second through hole 103 is opened in the contact container 10, and the connection member 30 is drilled in the second through hole 103 so that the connection member 30 is connected to the contact container 10 and the first magnetic conductive body 40 is connected to the connection member 30. The first magnetic conductive body 40 is connected to the contact container 10 via the connecting member 30, but is not directly connected to the contact container 10, so that the connection process can be visualized without obstruction, making operation easy and ensuring the reliability of the connection.

[0136] It should be noted that the terms "including" and "having" in the embodiments of the present invention are intended to cover non-exclusive inclusion and mean any variations thereof, for example, a process, method, system, product or device that includes 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.

[0137] The contact container 10 includes a yoke plate 13 and an insulating cover 11a, and the insulating cover 11a covers the side of the yoke plate 13 to form a contact chamber 101 of the contact container 10. In one embodiment, the insulating cover 11a includes a top wall and a side wall, and a first through hole 102 and a second through hole 103 are formed in the top wall. The yoke plate 13 has a third through hole 131 communicating with the contact chamber 101, and the push rod assembly 50 is movably mounted in the third through hole 131. Two yoke clamps 1320 surround the insulating cover 11a.

[0138] 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 of a metal part having an annular structure such as an iron-nickel alloy, and one end of the flange member 12 is connected to the opening edge of the ceramic cover 11 by laser welding, brazing, resistance welding, adhesion, etc. The other end of the flange member 12 is connected to the yoke plate 13, and may be similarly laser welding, brazing, resistance welding, adhesion, etc. The flange member 12 is provided between the ceramic cover 11 and the yoke plate 13, which can facilitate the connection between the ceramic cover 11 and the yoke plate 13.

[0139] Two arc-extinguishing magnets 1310 are positioned on either side of the ceramic cover 11 , and two yoke clamps 1320 surround the ceramic cover 11 and the two arc-extinguishing magnets 1310 .

[0140] The ceramic cover 11 includes a top wall 111 and a side wall 112, one end of the side wall 112 is surrounded by and connected to the outer periphery of the top wall 111, and the other end of the side wall 112 is connected to the yoke plate 13 via a flange member 12. The first through hole 102 and the second through hole 103 are both opened in the top wall 111, and the first end 31 of the connecting member 30 is connected to the outer surface of the top wall 111.

[0141] One of the pair of fixed contact drawn ends 20 functions as a terminal for current inflow, and the other functions as a terminal for current outflow. The fixed contact drawn end 20 is drilled in the first through-hole 102, and a portion of the fixed contact drawn end 20 advances into the contact chamber 101 to contact or separate from the movable contactor 54. A portion of the fixed contact drawn end 20 is exposed on the outer surface of the ceramic cover 11.

[0142] The bottom of the fixed contact pull-out end 20 can be a fixed contact, and both ends of the movable contactor 54 in the longitudinal direction D2 can be movable contacts. The movable contacts at both ends of the movable contactor 54 can protrude from other parts of the movable contactor 54 or can be aligned with other parts.

[0143] In addition, the fixed contact may be provided integrally or separately at the bottom of the fixed contact pull-out end 20, and the movable contact may be provided integrally or separately at both ends of the movable contactor 54 in the longitudinal direction D2.

[0144] The second through hole 103 may be provided between two first through holes 102, that is, the connection member 30 may be provided between a pair of fixed contact pull-out ends 20. The number of the second through holes 103 may be one or more. In this embodiment, the number of the second through holes 103 is two, but is not limited thereto.

[0145] Correspondingly, the number of the connecting members 30 may be one or more. In this embodiment, the number of the connecting members 30 is two, but is not limited thereto.

[0146] 4, the outer surface of the top wall 111 of the ceramic cover 11 is provided with a first metallization layer 113 on the periphery located at the first through hole 102, and a second metallization layer 114 on the periphery located at the second through hole 103. The fixed contact lead-out end 20 is welded to the top wall 111 via the first metallization layer 113, and the first end 31 of the connection member 30 is welded to the top wall 111 via the second metallization layer 114.

[0147] The outer surface of the top wall 111 of the ceramic cover 11 is easier to form a welded flat surface than the inner surface of the ceramic cover 11. In addition, the fixed contact lead end 20 must be provided on the top wall 111 of the ceramic cover 11, and a metallized layer must be provided on the periphery of the first through hole 102 when the fixed contact lead end 20 is welded to the top wall 111. Therefore, when processing the first metallized layer 113 of the first through hole 102, the second metallized layer 114 of the second through hole 103 is processed at the same time. Therefore, by welding the connection member 30 to the outer surface of the top wall 111 of the ceramic cover 11, it is possible to process the metallized layer only on the outer surface of the top wall 111 without the need to process the metallized layer on the inner surface of the top wall 111, which makes processing easy and simplifies the processing steps.

[0148] The first magnetic conductive body 40 is provided at a distance from the inner surface of the top wall 111. That is, the length of the connecting member 30 is greater than the sum of the thicknesses of the top wall 111 and the first magnetic conductive body 40, so that the first magnetic conductive body 40 is suspended from the top wall 111 of the ceramic cover 11 via the connecting member 30.

[0149] The first magnetic conductive body 40 is provided at a distance from the inner surface of the top wall 111 by having a gap between the first magnetic conductive body 40 and the inner surface of the top wall 111. Since the first magnetic conductive body 40 is not in direct contact with the inner surface of the top wall 111, the first magnetic conductive body 40 does not affect the creepage distance between the pair of fixed contact lead-out ends 20.

[0150] 3 and 4, the first magnetic conductive body 40 includes a plurality of stacked magnetic conductive pieces 41 connected to the second end 32 of the connecting member 30. An opening 411 is formed in each of the magnetic conductive pieces 41, and the connecting member 30 is drilled into the opening 411 and riveted to the magnetic conductive piece 41 located at the bottom.

[0151] Of course, when the first magnetic conductive body 40 includes a plurality of stacked magnetic conductive pieces 41, the opening 411 of the lowest magnetic conductive piece 41 may be a blind hole, and the openings 411 of the remaining magnetic conductive pieces 41 may be through holes. The connecting member 30 is drilled in each opening 411 of the remaining magnetic conductive pieces 41, and the second end of the connecting member 30 enters the blind hole of the lowest magnetic conductive piece 41 and is welded to this magnetic conductive piece 41.

[0152] Furthermore, when the first magnetic conductive body 40 is one piece, an opening 411 is provided in the first magnetic conductive body 40, and the opening 411 may be a through hole or a blind hole. When the opening 411 is a through hole, the connection member 30 is riveted to the first magnetic conductive body 40 after passing through the opening 411. When the opening 411 is a blind hole, solder is provided in the blind hole, and the second end 32 of the connection member 30 may enter the blind hole and be welded to the first magnetic conductive body 40.

[0153] For example, when the short-circuit current is 10 kA or more, it is necessary to increase the thickness of the first magnetic conductive body 40 in order to generate a larger magnetic attractive force, and further, it is necessary to make it possible for the magnetic attractive force between the first magnetic conductive body 40 and the second magnetic conductive body 55 to overcome the repulsive force caused by the short-circuit current and prevent the movable contact 54 from popping off the fixed contact lead-out end 20. However, a thick first magnetic conductive body 40 increases the cost and makes it difficult to connect it to the ceramic cover 11.

[0154] In this embodiment, the first magnetic conductive body 40 is connected to the contact container 10 via the connecting member 30, so that the first magnetic conductive body 40 can include a plurality of stacked magnetic conductive pieces 41, and the plurality of magnetic conductive pieces 41 can be connected by drilling holes 411 through the connecting member 30, and by increasing the number of thin magnetic conductive pieces 41, the overall thickness of the first magnetic conductive body 40 can be increased. The magnetic conductive pieces 41 are thin and can be made of thin materials, so that the material cost is low and the operation is easy. Meanwhile, the number of magnetic conductive pieces 41 can be flexibly adjusted according to the magnitude of the short-circuit current.

[0155] The top wall 111 and the side wall 112 of the ceramic cover 11 may be separate structures or may be connected by welding. By designing the ceramic cover 11 as a structure in which the top wall 111 and the side wall 112 are separate structures, the connection between the connection member 30 and the top wall 111 becomes easier. Of course, the top wall 111 and the side wall 112 may be connected by adhesion.

[0156] Specifically, because the top wall 111 is in a sheet shape, it is easier to process the first through hole 102, the second through hole 103, the first metallization layer 113, and the second metallization layer 114 on the top wall 111. Furthermore, the sheet-like structure also makes it easier to weld the connection member 30 to the top wall 111, and the fixed contact lead-out end 20 to the top wall 111.

[0157] Of course, the top wall 111 and the side wall 112 of the ceramic cover 11 may be of an integral structure.

[0158] The method of connecting the second end 32 of the connecting member 30 and the first magnetic conductive body 40 may be various embodiments such as welding, riveting, adhesive bonding, and the like.

[0159] In this embodiment, the second end 32 of the connection member 30 is riveted to the first magnetic conductive body 40. Specifically, the second end 32 of the connection member 30 and the first magnetic conductive body 40 are connected by an expansion rivet method.

[0160] The first magnetic conductive body 40 may be straight-shaped, and the second magnetic conductive body 55 may be U-shaped. The first magnetic conductive body 40 and the second magnetic conductive body 55 may be made of materials such as iron, cobalt, nickel, and alloys thereof.

[0161] Of course, it will be understood that the second magnetic conductive body 55 may include a plurality of stacked magnetic conductive pieces, or the second magnetic conductive body 55 may include a plurality of U-shaped magnetic conductive bodies arranged side by side.

[0162] 14 and 16, 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 covers the third through hole 131 on the yoke plate 13. The metal cover 1410 and the yoke plate 13 are surrounded as a chamber for accommodating the fixed core 1230 and the movable core 1240 of the electromagnet unit 1200, which will be described in detail below.

[0163] 4 and 16, the push rod assembly 50 further includes a push rod 51, a base 52, and an elastic member 56. The push rod 51 is movably disposed in the third through hole 131 of the yoke plate 13. One end of the push rod 51 is connected to the base 52, and the other end of the push rod 51 is connected to the movable iron core 1240 of the electromagnet unit 1200. One end of the elastic member 56 abuts against the base 52, and the other end of the elastic member 56 abuts against the movable member 53 composed of the movable contact 54 and the second magnetic conductive body 55, and the elastic member 56 provides an elastic force such that the movable contact 54 tends to move to the fixed contact pull-out end 20.

[0164] The elastic member 56 may be a spring, but is not limited to this.

[0165] Of course, in other embodiments, the push rod assembly 50 may have other configurations, not all of which are recited here.

[0166] As shown in FIG. 16, 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. The metal cover 1410 is provided inside the coil bobbin 1210. The coil 1220 surrounds the coil bobbin 1210. The fixed core 1230 is fixed inside the metal cover 1410, and a part of the fixed core 1230 enters the third through hole 131. The fixed core 1230 has a hole 1231, which is provided corresponding to the position of the third through hole 131 and is for providing the push rod 51. The movable core 1240 is movably provided within the metal cover 1410 and is provided opposite the fixed core 1230. The movable core 1240 is connected to the push rod 51 and is used to be attracted to the fixed core 1230 when the coil 1220 is energized. The movable core 1240 and the push rod 51 can be connected by screwing, riveting, welding, or other methods.

[0167] The reset member 1250 is located inside the metal cover 1410, and is disposed between the fixed core 1230 and the movable core 1240, and is used to reset the movable 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.

[0168] As shown in Figures 5 to 8, Figure 5 shows a schematic side view of a push rod assembly 50 according to a first embodiment of the present invention. Figure 6 shows an exploded schematic view of Figure 5. Figure 7 shows a partially enlarged view of X in Figure 5. Figure 8 shows a cross-sectional view of BB in Figure 5.

[0169] The push rod assembly 50 further includes a limit structure 57, which is connected to the base 52 and the movable member 53 and is used to limit the range of movement of the movable member 53 relative to the base 52. The limit structure 57 includes a limit hole 572 and a limit portion 571 that fit together, the limit hole 572 includes a first end 573 and a second end 574 that are provided opposite to each other along the moving direction D1 of the movable contact 54, the hole diameter of the second end 574 is larger than the hole diameter of the first end 573, and the limit portion 571 is movably drilled between the first end 573 and the second end 574 of the limit hole 572. When the movable contact 54 is separated from the fixed contact pull-out end 20, the limit portion 571 is located at the first end 573 of the limit hole 572.

[0170] In this embodiment, the base 52 is directly connected to the movable member 53 via the limit structure 57, which makes the assembly between the base and the movable member 53 easier. Also, since there is no other member above the movable member 53, movement interference between the other member and the first magnetic conductive body 40 during overtravel is avoided.

[0171] The limit hole 572 may be a through hole or a blind hole.

[0172] When the movable contact 54 is not in contact with the fixed contact pull-out end 20, the elastic member 56 causes the limit portion 571 to be located at the first end 573 of the limit hole 572. When the movable contact 54 contacts the fixed contact pull-out end 20 and the over-travel is completed, the limit portion 571 moves from the first end 573 to the second end 574 of the limit hole 572. Since the hole diameter of the second end 574 of the limit hole 572 is larger than the hole diameter of the first end 573, the limit hole 572 has a "large one end and small other end" structure, and the gap between the limit portion 571 and the hole wall of the limit hole 572 becomes large during the over-travel process, which can prevent friction and jamming between the limit portion 571 and the hole wall of the limit hole 572 during the movement of the movable contact 54 relative to the base 52. At the same time, the hole diameter of the first end 573 of the limit hole 572 is small, which does not affect the initial engagement between the limit portion 571 and the limit hole 572 and prevents the movable contact 54 from swinging relative to the base 52.

[0173] In addition, in the initial state, in order to realize the limit of the movable contact 54 and the base 52, the size of the hole diameter of the first end 573 of the limit hole 572 should be compatible with the shape of the limit portion 571 so that the limit portion 571 can realize a limit with the hole wall of the limit hole 572 when the limit portion 571 is positioned at the first end 573 of the limit hole 572.

[0174] 5 to 8, the diameter of limit hole 572 gradually increases from first end 573 to second end 574 of limit hole 572. During overtravel, as limit portion 571 moves from first end 573 to second end 574 of limit hole 572, the gap between limit portion 571 and the hole wall of limit hole 572 gradually increases.

[0175] Furthermore, the hole wall of the limit hole 572 includes a first plane 575 and a second plane 576 arranged opposite each other, and a first inclined surface 577 and a second inclined surface 578 arranged opposite each other, one ends of the first inclined surface 577 and the second inclined surface 578 are connected to both ends of the first plane 575, and the other ends of the first inclined surface 577 and the second inclined surface 578 are connected to both ends of the second plane 576.

[0176] In this embodiment, the shape of the limit hole 572 is a substantially isosceles trapezoid, but is not limited thereto. For example, the shape of the limit member hole 572 may be a normal trapezoid in which the inclinations of the first inclined surface 577 and the second inclined surface 578 are not equal. Alternatively, the shape of the limit member hole 572 may be a triangle, preferably an isosceles triangle.

[0177] Of course, in other embodiments, the diameter of the limit hole 572 does not have to gradually increase along the direction from the first end 573 to the second end 574 of the limit hole 572, and for example, the wall of the limit hole 572 may include a constant diameter step and an expanded diameter step. For example, from the first end 573 to the second end 574, the wall of the limit hole 572 may include an expanded diameter step, a constant diameter step, an expanded diameter step, a constant diameter step, and so on, in that order.

[0178] As shown in FIG. 7, the limit portion 571 has a first arcuate surface 571a, which is used to realize a limit with the hole wall of the limit hole 572 when the limit portion 571 is positioned at the first end 573 of the limit hole 572.

[0179] In this embodiment, by designing the outer wall of the limit portion 571 to include the first arcuate surface 571a so that there is line contact between the first arcuate surface 571a and the wall of the limit hole 572, the line contact reduces the frictional force between the limit portion 571 and the wall of the limit hole 572. When relative movement occurs between the limit portion 571 and the limit hole 572, jamming is less likely to occur.

[0180] The base 52 is provided with a limit member hole 572, and the movable member 53 includes a limit portion 571. Of course, in other embodiments, the limit hole 572 may be provided in the movable member 53, and the limit portion 571 may be provided in the base 52.

[0181] As shown in Figs. 5 to 8, in this embodiment, a limit hole 572 is provided in the base 52, and a limit portion 571 is provided in the second magnetic conductive body 55. The second magnetic conductive body 55 includes a bottom portion 551, a first side portion 552, and a second side portion 553. The first side portion 552 and the second side portion 553 are connected to both ends of the bottom portion 551 along the width direction D3 of the movable contactor 54. The first side portion 552 and the second side portion 553 are provided on two opposing sides of the width direction D3 of the movable contactor 54. The limit portion 571 is provided in both the first side portion 552 and the second side portion 553.

[0182] The moving direction D1, the longitudinal direction D2, and the width direction D3 are perpendicular to each other.

[0183] The base 52 includes a base portion 521, and a first limit member 522 and a second limit member 523 connected to the base portion 521 and arranged opposite each other, with a first side portion 552 arranged opposite the first limit member 522 and a second side portion 553 arranged opposite the second limit member 523, and both the first limit member 522 and the second limit member 523 having limit holes 572 formed therein.

[0184] The surface of the first limit member 522 facing the first side portion 552 and the surface of the second limit member 523 facing the second side portion 553 include a second arcuate surface 524 .

[0185] In this embodiment, the first limit member 522 is designed to include a second arcuate surface 524 on a side surface facing the first side portion 552, and the second limit member 523 is designed to include a second arcuate surface 524 on a side surface facing the second side portion 553, and the two second arcuate surfaces 524 are in line contact with the first side portion 552 and the second side portion 553, respectively, thereby reducing the frictional force between the first side portion 552 and the first limit member 522, and between the second side portion 553 and the second limit member 523. When the second magnetic conductive body 55 moves relative to the base 52, jamming is less likely to occur. In addition, it is possible to avoid the generation of debris to contaminate the contact chamber 101 of the relay.

[0186] A first side portion 552 and a second side portion 553 are located between the first limit member 522 and the second limit member 523. Limit portions 571 are protrudingly provided on both the side where the first side portion 552 is separated from the second side portion 553 and the side where the second side portion 553 is separated from the first side portion 552.

[0187] As an example, the limit portion 571 can be formed by pressing the side surfaces of the first side portion 552 / second side portion 553 to form a punch structure for the limit portion 571. The specific positions of the punch structures on the first side portion 552 / second side portion 553 can be flexibly adjusted according to the structure.

[0188] In this embodiment, the two limit portions 571 are respectively protruded on the side where the first side portion 552 moves away from the second side portion 553 and the side where the second side portion 553 moves away from the first side portion 552, so that the first side portion 552 and the second side portion 553 can be in sufficient contact with the first limit member 522 and the second limit member 523, respectively, and further, stability is ensured between the second magnetic conductive body 55 and the base 52 when limited, without affecting the magnetic conductivity efficiency.

[0189] In one embodiment, the limit portion 571 may be elongated. When the limit portion 571 is positioned at the first end 573 of the limit hole 572, the elongated side surface having a large area contacts the wall of the limit hole 572. By bringing the surface having a large area of ​​the limit portion 571 into contact with the wall of the limit hole 572, it is possible to effectively prevent the movable contactor 54 from swinging relative to the base 52 in the initial state, and to reduce the probability of the movable contactor 54 bouncing and springing back.

[0190] As shown in Fig. 9, Fig. 9 shows an exploded schematic view of a push rod assembly 50 according to a second embodiment of the present invention. The second embodiment is similar to the first embodiment described above, so a description thereof will be omitted, but the differences are as follows.

[0191] The limit portion 571 includes two convex hull structures. The two convex hull structures are spaced apart along the longitudinal direction D2 of the movable contact 54. The design of the double convex hull structure effectively prevents the movable contact 54 from swinging relative to the base 52 in the initial state, and reduces the probability of the movable contact 54 bouncing and springing back.

[0192] As shown in Fig. 10, Fig. 10 is an exploded schematic view of a push rod assembly 50 according to a third embodiment of the present invention. Explanation of the similarities between the third embodiment and the above-mentioned first embodiment will be omitted, but the differences are as follows.

[0193] The limit portion 571 is a rivet 579 , and the rivet 579 is riveted to the first side portion 552 / the second side portion 553 of the second magnetic conductive body 55 .

[0194] As shown in Fig. 11, Fig. 11 is an exploded schematic view of a push rod assembly 50 in a fourth embodiment of the present invention. Explanation of the similarities between the fourth embodiment and the above-mentioned first embodiment will be omitted, but the difference is that a limit portion 571 is provided at the bottom portion 551 of the second magnetic conductive body 55.

[0195] Specifically, the second magnetic conductive body 55 includes a bottom portion 551, a first side portion 552, and a second side portion 553. Limit portions 571 are protruded from two opposing sides of the bottom portion 551 along the width direction D3 of the movable contact 54. The first side portion 552 and the second side portion 553 are respectively connected to both ends of the bottom portion 551 along the width direction D3 of the movable contact 54. The first side portion 552 and the second side portion 553 are respectively provided on two opposing sides of the movable contact 54 in the width direction D3.

[0196] The base 52 includes a base 521, and a first limit member 522 and a second limit member 523 connected to the base 521 and arranged opposite each other, and both the first limit member 522 and the second limit member 523 have limit holes 572 formed therein.

[0197] As shown in Fig. 12, Fig. 12 is an exploded schematic view of a push rod assembly 50 according to the fifth embodiment of the present invention. Explanation of the similarities between the fifth embodiment and the first embodiment will be omitted, but the differences are as follows.

[0198] The base 52 includes a base portion 521, and a first limit member 522 and a second limit member 523 connected to the base portion 521 and disposed opposite each other, and the first limit member 522 and the second limit member 523 each have a limit hole 572. The movable member 53 further includes a fixed member 58 fixedly connected to the second magnetic conductive body 55, and limit portions 571 are provided on both sides of the fixed member 58.

[0199] As shown in Fig. 13, Fig. 13 is an exploded schematic diagram of a relay in the second embodiment of the present invention. Explanation of the similarities between the relay in the second embodiment and the relay in the first embodiment will be omitted, but the differences are as follows.

[0200] The limit portions 571 are provided to protrude from two opposing side edges of the base 52 of the push rod assembly 50. The movable member 53 further includes a fixed member 58 fixedly connected to the movable contact 54 and the second magnetic conductive body 55, and the fixed member 58 is provided with a limit hole 572.

[0201] The fixing member 58 has an inverted U-shape, and the positions of a first end 573 and a second end 574 of a limit hole 572 provided in the fixing member 58 are opposite to those of the limit hole 572 in the above-described embodiment.

[0202] Specifically, as shown in FIG. 13, a first end 573 of the limit hole 572 is located downward, a second end 574 is located upward, and the hole diameter of the second end 574 is larger than the hole diameter of the first end 573.

[0203] As shown in FIGS. 9 to 12, a first end 573 of the limit hole 572 is located at an upper position, and a second end 574 is located at a lower position.

[0204] In addition, various embodiments / exemplary embodiments provided by the present invention can be combined with each other without causing any contradiction, and therefore, description thereof will be omitted here.

[0205] In the embodiments of the invention, the terms "first", "second", and "third" are used only for descriptive purposes and are not to be understood to indicate or imply relative importance. The terms "one to one" and "one" are used only to bring out technical features and should not be understood to be a specific number limitation of the technical features unless otherwise expressly limited. The term "plurality" means two or more unless otherwise limited. Terms such as "attach", "contact", "connect", and "fix" should be understood broadly. For example, "connection" may be a fixed connection, a detachable connection, or an integral connection. "Contact" may be a direct connection or an indirect connection through 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 according to the specific circumstances.

[0206] In describing the embodiments of the present invention, the orientations or positional relationships indicated by terms such as "upper," "lower," "left," "right," "front," "rear," and the like are orientations or positional relationships based on the drawings and are intended merely to facilitate the explanation and simplification of the description of the embodiments of the present invention, and do not indicate or imply that the indicated device or unit must have a particular orientation in order to be configured and operate in a particular orientation, and should not be understood as limitations on the embodiments of the invention.

[0207] In the description herein, the term "one embodiment," "some embodiments," "particular embodiment," etc. means 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 expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0208] 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. 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 relay including a contact can, a pair of fixed contact leads, a connecting member, a first magnetic conductive body, and a push rod assembly, the contact vessel has a contact chamber and a pair of a first through hole and a second through hole, the first through hole and the second through hole both communicating with the contact chamber; the pair of fixed contact lead ends are drilled in a pair of the first through holes in a one-to-one correspondence and connected to the contact container; the connecting member is inserted into the second through hole and includes a first end and a second end, the first end being connected to the contact container; the first magnetic conductive body is disposed within the contact chamber and is connected to a second end of the connecting member; The push rod assembly includes a movable member having a movable contact, the movable member being movably disposed within the contact chamber so as to bring the movable contact into contact with or away from the pair of fixed contact pull-out ends, and the first magnetic body being disposed on a side of the movable contact facing the fixed contact pull-out ends. A relay characterized by:

2. The second through hole is provided between the pair of first through holes.

2. A relay as claimed in claim 1.

3. The contact container includes a yoke plate and an insulating cover, the yoke plate has a third through hole communicating with the contact chamber, and the push rod of the push rod assembly is movably inserted into the third through hole; an insulating cover connected to the yoke plate; The first through hole and the second through hole are opened in the insulating cover, and a first end of the connecting member is connected to an outer surface of the insulating cover.

2. A relay as claimed in claim 1.

4. The insulating cover includes a top wall and a side wall, one end of the side wall is connected to an outer periphery of the top wall, the other end of the side wall is connected to the yoke plate, and the first through hole and the second through hole are opened in the top wall.

4. A relay as claimed in claim 3.

5. the insulating cover includes a ceramic cover and a flange member, the ceramic cover includes a top wall and a side wall, the side wall is connected to the yoke plate via the flange member, a first metallization layer is provided on an outer surface of the top wall at a periphery located at the first through hole, and a second metallization layer is provided on a periphery located at the second through hole; The fixed contact lead end is welded to the top wall through the first metallization layer, and the first end of the connecting member is welded to the top wall through the second metallization layer.

4. A relay as claimed in claim 3.

6. The top wall and the side wall are integral with each other, or the top wall and the side wall are separate from each other.

6. A relay as claimed in claim 4 or 5.

7. The first magnetic conductive body is provided with a space between the inner surface of the top wall.

6. A relay as claimed in claim 4 or 5.

8. The second end of the connecting member is riveted, welded or glued to the first magnetic conductive body.

2. A relay as claimed in claim 1.

9. The first magnetic conductive body includes a plurality of laminated magnetic conductive pieces, and the plurality of magnetic conductive pieces are connected to a second end of the connection member.

2. A relay as claimed in claim 1.

10. The push rod assembly further includes a base, an elastic member, and a limit structure. One end of the elastic member abuts against the base and the other end abuts against the movable member, and the elastic member provides an elastic force such that the movable contact has a tendency to move toward the fixed contact pull-out end; the limit structure is connected to the base and the movable member and is used to limit the range of movement of the movable member relative to the base, the limit structure includes a limit hole and a limit portion that fit together, the limit hole includes a first end and a second end that are provided opposite to each other in the moving direction of the movable contact, the limit portion is drilled within the limit hole and is movable between the first end and the second end, When the movable contact is separated from the fixed contact lead-out end, the limit portion is located at the first end of the limit hole.

2. A relay as claimed in claim 1.

11. The hole diameter at the second end is larger than the hole diameter at the first end.

11. A relay as claimed in claim 10.

12. The limit portion has a first arcuate surface, and the first arcuate surface fits into the limit hole when the limit portion is positioned at the first end of the limit hole to realize a limit in the length direction of the movable contactor.

11. A relay as claimed in claim 10.

13. The movable member further includes a fixed member fixedly connected to the movable contact, the limit portion being provided on one of the fixed member and the base, and the limit hole being provided on the other of the fixed member and the base.

11. A relay as claimed in claim 10.

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