Classifications

• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H1/00—Contacts
  • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
  • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
  • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
  • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
  • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/02—Housings; Casings; Bases; Mountings
  • H01H2071/0292—Housing or frames containing grooves or slots for guiding movable parts
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/02—Housings; Casings; Bases; Mountings
  • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/02—Housings; Casings; Bases; Mountings
  • H01H71/025—Constructional details of housings or casings not concerning the mounting or assembly of the different internal parts
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
  • H01H71/10—Operating or release mechanisms
  • H01H71/50—Manual reset mechanisms which may be also used for manual release
  • H01H71/504—Manual reset mechanisms which may be also used for manual release provided with anti-rebound means
• • H—ELECTRICITY
  • H01—ELECTRIC ELEMENTS
  • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
  • H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
  • H01H73/02—Details
  • H01H73/04—Contacts

Definitions

• the present invention relates to a circuit breaker having a plurality of movers arranged side by side on the same pole and flexible conductors respectively connected to the movers.
• FIG. 5 is a schematic diagram showing a conventional circuit breaker described in, for example, Japanese Patent Application Laid-Open No. 4-118825.
• FIG. 6 is a sectional view showing a contact portion of the circuit breaker shown in FIG.
• FIG. 7 is an enlarged cross-sectional view of a main part along a line V I I-V I I in FIG. 6, showing a state where a contact portion of the circuit breaker is in a closed state.
• FIG. 8 is a cross-sectional view showing the open state of the contact portion of the circuit breaker as in FIG.
• 1 is a housing formed of a synthetic resin material
• 2 is a plurality of fixed conductors arranged side by side on the housing 1
• 3 is a fixed contact fixed to the fixed conductor 2.
• Reference numeral 4 denotes a movable contact that separates from and separates from the fixed contact 2.
• Reference numeral 5 denotes a movable element to which the movable contact 4 is fixed and which is arranged in parallel (as shown in FIG. 7).
• Reference numeral 6 denotes a contact arm that rotatably holds the mover 5 by the mover pin 7, and 8 denotes a contact arm pin that rotatably supports the contact arm 6 to the housing 1.
• Reference numeral 9 denotes a conductor forming a terminal
• 10 denotes a flexible conductor connecting the mover 5 and the conductor 9
• 11 denotes a contact pressure spring
• 12 denotes a movable contact 4 connected to the contact arm 6 by a pin 13.
• An opening / closing mechanism for opening and closing 14 is a trip relay
• 15 is an arc extinguishing device.
• the present invention has been made in order to solve such a problem.
• a circuit breaker capable of smoothly opening and closing without contact being displaced in the lateral direction even when an overcurrent flows for a short time in the circuit breaker is provided.
• the purpose is to gain. Disclosure of the invention
• a circuit breaker comprises: a housing; a plurality of fixed contacts provided in the housing; a plurality of movers each having a movable contact that is separated from and connected to the fixed contact;
• a circuit breaker having a contact arm that rotatably holds, when the mover is in the open position, a predetermined gap is provided between the tip surface of the mover pin and the side wall of the housing, An inclined surface is provided on the side wall of the housing that faces the tip surface of the mover pin so that the gap between the tip surface of the mover pin and the side wall is small when the mover is in the closed position. It is assumed that.
• a friction reducing member can be provided on the side wall of the housing facing the distal end surface of the mover pin.
• tip surface of the mover pin may be spherical.
• the contact arm is rotatably supported by the contact arm pin, and the contact arm pin is provided with a tubular bush for preventing movement in the axial direction. Is also good.
• the circuit breaker according to the present invention includes a housing, a plurality of fixed contacts provided in the housing, a plurality of movable elements each having a movable contact that is separated from and connected to the fixed contact, and a movable element.
• a circuit breaker equipped with a contact arm pin that rotatably supports a contact arm that can be held as possible the contact arm and the contact arm pin can be moved with reduced play between them. It is characterized in that a tubular bush for preventing lateral movement of the child is provided.
• FIG. 1 is a sectional view showing an open state of a contact portion of a circuit breaker according to a first embodiment of the present invention.
• FIG. 2 is a sectional view showing a closed state of a contact portion of the circuit breaker of FIG.
• FIG. 3 is a plan view showing a movable contact of the circuit breaker according to the second embodiment of the present invention.
• FIG. 4 is a front view showing a movable contact of the circuit breaker according to the second embodiment of the present invention.
• FIG. 5 is a schematic diagram showing a conventional circuit breaker.
• FIG. 6 is a sectional view showing a contact portion of a conventional circuit breaker.
• FIG. 7 is an enlarged cross-sectional view of a main part along line VII-VII in FIG. 6, and is a diagram showing a closed state of the contact part.
• FIG. 8 is a cross-sectional view showing an open state of the contact portion similarly to FIG. BEST MODE FOR CARRYING OUT THE INVENTION
• FIG. 1 and 2 are enlarged sectional views of a main part of a contact portion of a circuit breaker according to an embodiment of the present invention.
• FIG. 1 shows an open state
• FIG. 2 shows a closed state.
• reference numerals 1 to 7 are the same as those of the above-mentioned conventional apparatus, and therefore, the description thereof is omitted.
• Reference numeral 1a denotes a side wall of the housing 1, on which an inclined surface having a draft for molding is formed such that the dimension L2 on the movable element 5 side becomes larger than the dimension 1 on the fixed conductor 2 side.
• the inclined surface there is a predetermined gap G1 between the end face 7a and the side wall 1a of the housing 1, and when the mover 5 moves to the closed position as shown in FIG. 2, the mover pin tip end face 7a and the side wall
• the gap between 1a is formed to be G2.
• the gap G1 is desirably 2 mm or more
• the gap G2 is desirably 0.05 to 0.5 mm.
• Reference numeral 16 denotes a sliding piece as a friction reducing member, which is formed of, for example, a phosphor bronze plate, a stainless steel plate, a carbon steel plate subjected to wear resistance, etc.
• the movable member pin 7 is provided by bonding, fitting, or the like to the side wall 1 a of the portion opposed to the distal end surface 7 a.
• tip end surface 7a of the mover pin 7 is formed in a spherical shape in order to reduce the contact friction force with the sliding piece 16.
• a predetermined gap G1 is provided between the tip end surface 7a of the mover pin 7 and the side wall 1a of the housing 1.
• the gap G2 between the tip surface 7a of the mover pin 7 and the side wall 1a becomes a small gap so that the gap G2 becomes small.
• the spherical tip surfaces 7 a provided on both end surfaces of the mover pin 7 perform the insertion operation while contacting the sliding piece 16.
• the contact friction force is small, smooth operation is possible.
• the gap G2 between the tip surface 7a of the mover pin 7 and the sliding piece 16 becomes a small gap that allows the mover 5 to open and close. Even if the electromagnetic force between the different poles interacts with each other, the mover 5 and the movable contact 4 are displaced only by this small gap, so that the arc between the contacts is eliminated and the short-time current-carrying performance is improved.
• the contact pressure which is the most load during the closing operation, can be reduced, and the open / close durability is improved.
• FIG. 3 and 4 show a movable contact portion of another embodiment of the circuit breaker of the present invention.
• FIG. 3 is a plan view and FIG. 4 is a front view.
• reference numerals 4 to 13 are the same as those of the above-described conventional device, and therefore, the description thereof is omitted.
• Numeral 17 denotes a tubular bush, which is provided on a contact pin 8 which forms a rotation center so that the mover 5 and the flexible conductor 10 can rotate.
• the bush 17 is in close contact with the contact pin 8 on the inner peripheral surface, and both end surfaces are in contact with the shunt holder 18 and the side plate 6 a of the contact arm 6.
• the bush 17 is almost in contact with the shunt holder 18 and the contact arm 6 for fixing and positioning the entire mover section to the housing 1, the mover 5 and the flexible In the direction in which the conductor 10 rotates about the contact arm pin 8, the conductor 10 can rotate without any resistance, but there is no parallel movement or rotational movement in the axial direction of the contact arm pin 8, that is, the arrow Y direction. . Therefore, the movement of the mover 5 and the movable contact 4 in the lateral direction is suppressed.
• this embodiment prevents lateral displacement at the position of the contact arm pin 8, which is the center of rotation of the mover 5 and the flexible conductor 10. By doing so, it is possible to prevent lateral displacement due to mutual electromagnetic force between different poles, which is the same function as in the first embodiment, eliminates arcing between contacts, and improves short-time conduction performance .
• a bush is provided between the contact arm pin 8 and the contact arm 6 shown in FIGS. 3 and 4, and between the side wall of the housing 1 and the mover pin 7 shown in FIGS. It can be used in combination with the embodiment in which the gap is reduced, or can be used alone.
• the circuit breaker is provided with an inclined surface on the side wall of the housing facing the distal end surface of the mover pin so that the clearance between the distal end surface of the mover pin and the side wall is a small gap. Therefore, even when an excessive current such as an accident current flows, the mover does not displace in the horizontal direction, so that the contact is stable and the circuit breaker ignites between the contacts before the short-time cutoff operation. Disappears. In addition, since the contact friction force is small, smooth operation is possible.
• a friction reducing member is provided on the side wall of the housing facing the tip surface of the mover pin, or since the tip surface of the mover pin is spherical, the opening / closing operation of the mover is not affected. Furthermore, since a tubular bush is provided between the contact arm and the contact arm pin to reduce the play between the contact arm and the lateral movement of the mover, the bush is the center of rotation of the mover and the flexible conductor. The lateral displacement at the position of the contact arm pin can be prevented, the lateral displacement due to the mutual electromagnetic force between the different poles can be prevented, the arc between the contacts is eliminated, and the short-time conduction performance is improved.
• the circuit breaker according to the present invention has a stable contact, does not ignite between the contacts before the circuit breaker performs the short-time cutoff operation, has a smooth operation, improves the short-time energizing performance, and opens and closes. It has improved durability and can be used as a circuit breaker for receiving and distributing power.

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Priority Applications (8)

Applications Claiming Priority (1)

Publications (1)

Family

ID=11735563

Family Applications (1)

Country Status (8)

Cited By (3)

Families Citing this family (1)

Citations (3)

Family Cites Families (3)

• 2000
  • 2000-01-11 ES ES00900171T patent/ES2249243T3/es not_active Expired - Lifetime
  • 2000-01-11 EP EP00900171A patent/EP1168391B1/de not_active Expired - Lifetime
  • 2000-01-11 CN CNB008045852A patent/CN1189904C/zh not_active Expired - Fee Related
  • 2000-01-11 WO PCT/JP2000/000076 patent/WO2001052289A1/ja active IP Right Grant
  • 2000-01-11 DE DE60024426T patent/DE60024426T2/de not_active Expired - Lifetime
  • 2000-01-11 TW TW089100297A patent/TW512380B/zh not_active IP Right Cessation
  • 2000-01-11 JP JP2001552417A patent/JP4329922B2/ja not_active Expired - Fee Related
  • 2000-01-11 KR KR10-2001-7011377A patent/KR100447439B1/ko active IP Right Grant

Patent Citations (3)

Non-Patent Citations (1)

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