Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H50/00—Details of electromagnetic relays
  • H01H50/02—Bases; Casings; Covers
  • H01H50/04—Mounting complete relay or separate parts of relay on a base or inside a case
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H1/00—Contacts
  • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
  • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H50/00—Details of electromagnetic relays
  • H01H50/54—Contact arrangements
  • H01H50/56—Contact spring sets
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H50/00—Details of electromagnetic relays
  • H01H50/54—Contact arrangements
  • H01H50/56—Contact spring sets
  • H01H50/58—Driving arrangements structurally associated therewith; Mounting of driving arrangements on armature
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H50/00—Details of electromagnetic relays
  • H01H50/64—Driving arrangements between movable part of magnetic circuit and contact
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H1/00—Contacts
  • H01H1/50—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position
  • H01H1/54—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force
  • H01H2001/545—Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position by magnetic force having permanent magnets directly associated with the contacts
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H50/00—Details of electromagnetic relays
  • H01H50/16—Magnetic circuit arrangements
  • H01H50/36—Stationary parts of magnetic circuit, e.g. yoke
  • H01H50/38—Part of main magnetic circuit shaped to suppress arcing between the contacts of the relay
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H50/00—Details of electromagnetic relays
  • H01H50/54—Contact arrangements
  • H01H50/546—Contact arrangements for contactors having bridging contacts
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
  • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
  • H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
  • H01H9/443—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet using permanent magnets

Definitions

• a relay is an electronic control device that has a control system (also known as an input circuit) and a controlled system (also known as an output circuit) and is typically used in an automatic control circuit.
• the relay is actually an "automatic switch” that uses a smaller current to control a larger current.
• the relay plays a role in automatic regulation, safety protection, and circuit switching and so on.
• the fixed anti-short circuit structure greatly enhances its anti-short circuit ability, a breaking ability is weakened due to a negative correlation between the anti-short circuit ability and the breaking ability.
• the follower anti-short circuit structure is affected by a retaining force for a movable iron core; when the short-circuit current is high, the iron core will be disengaged, causing the contacts to pop open; if the retaining force for the movable iron core is increased, a coil needs to be enlarged, which goes against small volume and lightweight designs.
• a relay according to embodiments of the present disclosure includes a contact container, a pair of static contact leading-out terminals, a first magnetizer, a push rod assembly, a movable contact assembly and an elastic member.
• the contact container has a contact chamber.
• the pair of static contact leading-out terminals are connected to the contact container, each static contact leading-out terminal is at least partially located within the contact chamber.
• the first magnetizer is disposed in the contact chamber and fixedly disposed relative to the contact container.
• the push rod assembly includes a push rod and a second magnetizer, the push rod is movable along an axial direction of the push rod relative to the contact container, and the second magnetizer is disposed at an end of the push rod and offset from the first magnetizer in the axial direction of the push rod.
• the movable contact assembly is movable relative to the push rod assembly along the axial direction of the push rod and between a first position close to the static contact leading-out terminal and a second position away from the static contact leading-out terminal.
• the bracket includes: a top portion, the second magnetizer is connected to an inner wall surface of the top portion; and two lateral portions connected to both sides of the top portion respectively, wherein an end, away from the top portion, of each of the two lateral portions is connected to the base; and the two lateral portions, the top portion and the base together form a space for movement of the movable contact assembly.
• One embodiment of the present disclosure has at least the following advantages or beneficial effects.
• the arc extinguishing unit 1300 also includes two yoke clamps 1320 disposed corresponding to positions of the two arc extinguishing magnets 1310. Moreover, the two yoke clamps 1320 surround the sealing unit 1400 and the two arc extinguishing magnets 1310. With the design of the yoke clamps 1320 surrounding the arc extinguishing magnets 1310, the magnetic field generated by the arc extinguishing magnets 1310 can be prevented from spreading outwards and affecting an arc extinguishing effect.
• Each yoke clamp 1320 is made of a soft magnetic material, which may include but is not limited to iron, cobalt, nickel, and alloys thereof.
• the movable contact assembly 53 is movable relative to the push rod assembly 50 along the axial direction of the push rod 51 between the first position and the second position, in which the "first position" and the “second position” refer to relative positions of the movable contact assembly 53 and the push rod assembly 50.
• the electromagnetic unit 1200 may drive the push rod 51, the support seat 52, and the movable contact assembly 53 to move together towards a direction close to the static contact leading-out terminal 20.
• the movable contact assembly 53 comes into contact with the static contact leading-out terminal 20
• the movable contact assembly 53 is stopped by the static contact leading-out terminal 20, while the push rod 51 and the support seat 52 continue to move upwards until an overtravel process is completed.
• the overtravel process relative movement is generated between the movable contact assembly 53 and the push rod assembly 50.
• the elastic member 56 is disposed between the movable contact assembly 53 and the support seat 52, and is used to apply an elastic force to the movable contact assembly 53 to move towards the first position.
• the movable iron core 1240 is movably disposed inside the metal cover 1410 and is opposite to the static iron core.
• the movable iron core 1240 is connected to the push rod 51 and is used to be attracted by the static iron core when the coil 1220 is energized.
• the movable iron core 1240 and the push rod 51 may be connected by screwing, riveting, welding, or other means.
• a first magnetic circuit is formed between the first magnetizer 40 and the third magnetizer 55, thereby generating a magnetic attraction force between the first magnetizer 40 and the third magnetizer 55;
• a second magnetic circuit is formed between the second magnetizer 60 and the third magnetizer 55, thereby generating a magnetic attraction force between the second magnetizer 60 and the third magnetizer 55. Since the first magnetizer 40 is fixedly disposed relative to the contact container 10, a fixed anti-short circuit structure is formed between the first magnetizer 40 and the third magnetizer 55 when a short-circuit current is applied, and a retaining force for the fixed anti-short circuit structure is provided by the contact container 10.
• the second magnetizer 60 comes into contact with the movable contact assembly 53, in which case the magnetic gap between the second magnetizer 60 and the third magnetizer 55 is smaller than a magnetic gap between the first magnetizer 40 and the third magnetizer 55.
• a magnetic induction line is formed between the first magnetizer 40 and the third magnetizer 55.
• three magnetic induction lines are formed between the second magnetizer 60 and the third magnetizer 55.
• the magnetic attraction force between the second magnetizer 60 and the third magnetizer 55 is larger, while the magnetic attraction force between the first magnetizer 40 and the third magnetizer 55 is smaller. Since the second magnetizer 60 is in contact with the movable contact assembly 53, the magnetic attraction force between the second magnetizer 60 and the third magnetizer 55 becomes an internal force, which will not affect the breaking of the movable contact piece 54. Therefore, the movable contact piece 54 only needs to overcome the smaller magnetic attraction force between the first magnetizer 40 and the third magnetizer 55 to achieve breaking.
• the first magnetizer 40 and the second magnetizer 60 are offset, and the magnetic attraction force between the two will not cancel out, which may reduce the thickness of the first magnetizer 40. Further, as the thickness of the first magnetizer 40 decreases, the magnetic attraction force generated between the first magnetizer 40 and the third magnetizer 55 also decreases.
• the magnetic attraction force of the first magnetizer 40 that the movable contact piece 54 needs to resist is also reduced, which is more conducive to achieving breaking.
• the first magnetizer 40 is fixedly disposed relative to the contact container 10, and the fixed anti-short circuit structure is formed between the first magnetizer 40 and the third magnetizer 55;
• the second magnetizer 60 is fixedly connected to the support seat 52 of the push rod assembly 50, and the follower anti-short circuit structure is formed between the second magnetizer 60 and the third magnetizer 55;
• the first magnetizer 40 and the second magnetizer 60 are offset along the axial direction of the push rod 51, so that the relay of embodiments of the present disclosure not only meets the requirements of anti-short circuit and limit breaking, but also has advantages of reducing the cost and the volume of the relay.
• the movable contact assembly 53 is in the first position relative to the push rod assembly 50, and the second magnetizer 60 is in direct contact with the third magnetizer 55.
• the magnetic attraction force between the first magnetizer 40 and the third magnetizer 55 is smaller, which is more conducive to the breaking of the movable contact piece 54 and the static contact leading-out terminal 20.
• the second magnetizer 60 includes a first magnetizer piece 610 and a second magnetizer piece 620.
• the first magnetizer piece 610 and the second magnetizer piece 620 are disposed side by side along the length direction D2 of the movable contact piece 54 and are respectively located at two opposite sides of the first magnetizer 40.
• the bracket 522 has an opening 525, which is used to avoid the first magnetizer 40 when the support seat 52 moves relative to the contact container 10.
• the outer wall surface of the top wall 111 of the ceramic cover 11 is more likely to form a welding plane.
• the top wall 111 of the ceramic cover 11 needs to be provided with the static contact leading-out terminal 20, and the metallization layer also needs to be provided at the periphery of the first through-hole 102 when the static contact leading-out terminal 20 is welded to the top wall 111, the second metallization layer 114 for the second through-hole 103 is also processed together with the processing of the first metallization layer 113 for the first through-hole 102.
• the metallization layer may be processed only on the outer wall surface of the top wall 111, without the need to process the metallization layer on the inner wall surface of the top wall 111, which facilitates processing and simplifies the processing steps.
• the first magnetizer 40 is spaced apart from the inner wall surface of the top wall 111. Since the first magnetizer 40 and the inner wall surface of the top wall 111 are spaced apart, there is a gap between the first magnetizer 40 and the inner wall surface of the top wall 111. Since the first magnetizer 40 is not in direct contact with the inner wall surface of the top wall 111, the arrangement of the first magnetizer 40 does not affect a creepage distance of one pair of static contact leading-out terminals 20.
• the top wall 111 and the side wall 112 are of a separate structure and are connected by welding.
• the sheet-like structure makes it 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. Further, the sheet-like structure makes it easier to achieve welding between the connector 30 and the top wall 111, as well as between the static contact leading-out terminal 20 and the top wall 111.
• the first magnetizer 40 has a perforation 41 that runs through two opposite sides of the first magnetizer 40 along the axial direction of the push rod 51.
• the second magnetizer 60 corresponds to the perforation 41.

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• Physics & Mathematics (AREA)
• Electromagnetism (AREA)
• Contacts (AREA)
• Electromagnets (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=90668826

Family Applications (1)

Country Status (5)

Family Cites Families (11)

• 2022
  • 2022-10-12 CN CN202211249316.5A patent/CN117912892A/zh active Pending
• 2023
  • 2023-10-11 KR KR1020257015491A patent/KR20250087656A/ko active Pending
  • 2023-10-11 WO PCT/CN2023/124059 patent/WO2024078543A1/fr not_active Ceased
  • 2023-10-11 EP EP23876744.6A patent/EP4604158A4/fr active Pending
  • 2023-10-11 JP JP2025521193A patent/JP2025533263A/ja active Pending

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