Classifications

• • 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
  • H01H71/52—Manual reset mechanisms which may be also used for manual release actuated by lever
  • H01H71/522—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism
  • H01H71/525—Manual reset mechanisms which may be also used for manual release actuated by lever comprising a cradle-mechanism comprising a toggle between cradle and contact arm and mechanism spring acting between handle and toggle knee
• • 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
• • 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
  • H01H71/12—Automatic release mechanisms with or without manual release
• • 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
  • H01H71/12—Automatic release mechanisms with or without manual release
  • H01H71/40—Combined electrothermal and electromagnetic mechanisms

Definitions

• the present invention relates to a mechanical tripping device for electrical apparatus for cutting off at least one electrical line, conventionally comprising a fixed contact and a mobile contact per line.
• these devices also comprise a maneuvering member movable manually, and movable between two stable positions respectively corresponding to the opening and closing of the contacts.
• a third stable position located between the first two, marking an intermediate position corresponding to the opening of the contacts resulting from the tilting of the lock following overcurrent due to overload or short circuit.
• the movement of the lever of this intermediate position towards the open position and beyond the latter in a reset position allows the reset of the trigger device, ie the reset of the device in the operative position .
• the invention relates more particularly to so-called electrical appliances with molded housing.
• this type of apparatus comprises return means against which the movable contact (s) is (are) moved (s) by the operating member in the closed position, and which ( the) returns to the open position when the trigger is pivoted.
• the electrical apparatus concerned is in most cases a multipole apparatus and, for the calibres concerned, each line is provided with a bimetallic strip and a magnetic motor reacting respectively to the overloads and over-currents in the line, each of which can trigger the product if these assumptions occur.
• the triggering device of the invention is characterized in particular by the fact that it comprises:
• a torsion spring placed between said lever and the transmission bar, the first of the ends of the spring applying to the lever, the second end urging the transmission bar to a rearmed position in which an integral protrusion of the transmission bar is positioned so as to rest on the lever in the vicinity of an orifice thereof, the rotation of the bar in case of overcurrent causing the displacement of said protuberance in front of the orifice and the tilting of the lever under the effect of the spring, said tilting causing the release of a tab integral with the release and inserted into a window of the lever when in the reset position, releasing the trigger which pivots to trigger the device.
• a protruding portion of the lever cooperating with an edge of the trigger during rearming causes the pivoting in the opposite direction of the release, said edge causing the pivoting of the lever to meet the spring by pressing on said projecting part, the spring in turn urging the bar of transmission in the rearm position.
• a single spring is used so that at the time of rearming, it is possible to reset the pivoting lever and the rotary transmission bar.
• these components are designed so that they have positioning means and relative games allowing a mechanical release action for a trigger in one direction, resetting in the other direction, by rotation simultaneous or successive involving in certain phases the release of the energy of the single torsion spring and in other phases the accumulation of this energy.
• the spring is thus placed in the kinematic chain that it constitutes with the pivoting lever and the transmission bar, so that the sequential actions on its branches have an effect, depending on the operating phase, on one or the other. other of these components or both at the same time.
• the torsion spring comprises a spiral central portion wound around the pivot shaft of the lever.
• the orifice with which the protrusion cooperates and the window of the lever in which the tab of the trigger is inserted are one and the same orifice.
• the rotary transmission rod that reflects the displacements of the magnetic and thermal subassemblies is free to rotate about a fixed rod relative to the housing of the apparatus, said bar being disposed transversely to said housing and provided with radial growth protrusions intended for half of them to cooperate with the ends of bimetallic bimetals and the other half with the pallets of magnetic trip circuits fitted to each line.
• this rotary transmission bar is provided with successive protrusions intended to cooperate with the moving components of the respective magnetic and thermal motors.
• FIG. 1 shows in perspective view the assembly constituted by the pivoting lever, the rotary transmission bar and the torsion spring acting on them;
• FIGS 2 and 3 show the same set, from two different angles;
• FIG. 4 is a perspective view of the transmission bar
• FIGS. 5 to 7 show three sectional views of the tripping device of the invention in the reset or reset position respectively during the resetting of the electrical device, in the intermediate position triggered following a problem on a line, and in the open position of the contacts. reset lock.
• the assembly which appears therein comprises a pivoting lever (1) interacting with a rotary bar (2) transmission, a torsion spring (3) being interposed interposed between the two.
• the central part of the spring (3) is wound around a shaft (4) which serves as a rotation axis to the pivoting lever (1).
• the ends of this shaft (4) are fixed relative to the housing of the electrical apparatus in which is integrated the trigger device of the invention.
• the bar (2) has protrusions of two types, unchanging protuberances (5) intended to cooperate with the pallets of magnetic subassemblies, and planar surface protuberances (6) which are intended to interact with the free ends of bimetals. thermal. When these protuberances (5) and (6), also visible in FIGS.
• the lever (1) then releases the trigger (12) (see Figures 5 and 6), a lug (11) is also inserted into the window (9) in the initialized position.
• the trigger (12) has a tendency to swing in a reverse rotation from that of the lever (1) in particular under the effect of the main spring of the lock, causing the switchover of the latter and the triggering of the electrical device.
• the trigger (12) is free to rotate about a shaft (13) fixed relative to the housing (not shown). Similarly, the bar (2) pivots by means of a shaft (14) free to rotate in a fixed element relative to said housing. To avoid any inadvertent movement of the trigger (12), it is provided with a tab (1 1) which cooperates with the window (9) so that, in the initialized (reset) position, rotation of the trigger (12) is prevented, or at least reduced to an amplitude not allowing to swing the lock.
• FIG. 5 shows the lock in the reset position, during the reset of the lock, the control lever (16) being actuated fully in the direction of the arrow F.
• the lower edge (17) of the trigger (12) acts on the protruding portion (15) of the lever (1) against the torsion spring (3), causing the lever (1) to rotate counterclockwise and allowing the bar (2) to rotate in the opposite direction the lever (1) exerting an action against the branch
• Figure 6 shows the opposite triggered lock, that is to say that the handle (16) is in an intermediate position signaling the trigger.
• the trigger (12) has turned counterclockwise about the shaft (13), the lug (11) released by the lever (1) for the tilting of the lock under the effect of the main spring, said lever (1) being biased towards the bar (2) due to the thrust on the tab (18) by the trigger (12).
• the triggering device of the The invention makes it possible, with greater reliability, to switch the lock in case of overcurrent or overload on one of the lines, and reset the assembly by manipulation of the control lever (16).

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Citations (2)

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• 2008
  • 2008-12-18 FR FR0858779A patent/FR2940511B1/fr not_active Expired - Fee Related
• 2009
  • 2009-12-17 JP JP2011541563A patent/JP5581334B2/ja active Active
  • 2009-12-17 EP EP09805720.1A patent/EP2368256B1/fr active Active
  • 2009-12-17 CN CN200980150247.9A patent/CN102246255B/zh active Active
  • 2009-12-17 WO PCT/FR2009/052582 patent/WO2010076512A1/fr active Application Filing
  • 2009-12-17 BR BRPI0918123A patent/BRPI0918123A2/pt not_active Application Discontinuation

Patent Citations (2)

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