EP0378030A1 - Unverletzliche Regelungsvorrichtung eines elektrischen Gerätes - Google Patents

Unverletzliche Regelungsvorrichtung eines elektrischen Gerätes Download PDF

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Publication number
EP0378030A1
EP0378030A1 EP89420487A EP89420487A EP0378030A1 EP 0378030 A1 EP0378030 A1 EP 0378030A1 EP 89420487 A EP89420487 A EP 89420487A EP 89420487 A EP89420487 A EP 89420487A EP 0378030 A1 EP0378030 A1 EP 0378030A1
Authority
EP
European Patent Office
Prior art keywords
button
adjustment
shell
adjustment device
locking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP89420487A
Other languages
English (en)
French (fr)
Other versions
EP0378030B1 (de
Inventor
Jacques Buisson
Jean-Pierre Bertrand
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Merlin Gerin SA filed Critical Merlin Gerin SA
Publication of EP0378030A1 publication Critical patent/EP0378030A1/de
Application granted granted Critical
Publication of EP0378030B1 publication Critical patent/EP0378030B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
    • H01H69/01—Apparatus or processes for the manufacture of emergency protective devices for calibrating or setting of devices to function under predetermined conditions
    • 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
    • H01H71/74—Means for adjusting the conditions under which the device will function to provide protection
    • H01H71/7463—Adjusting only the electromagnetic mechanism

Definitions

  • the invention relates to an adjustment device for adjusting a characteristic value for the control and / or triggering of an electrical appliance with molded insulating housing, comprising a rotary adjustment knob having a cylindrical lateral surface, and a means for blocking intended to immobilize in rotation the button after adjustment of said value,
  • the engagement part comprises a triangle portion which engages in a hollow in a groove to block the rotary button.
  • the engagement piece is urged elastically towards the hollow of a groove.
  • the setting can be readjusted by the customer at any time.
  • the immobilization in rotation occurs by means of a lug inserted in a circular orifice, formed by the facing of two conjugated semi-circular notches, belonging respectively to the housing and to the button.
  • Such an adjustment device has a limited number of positions, corresponding exactly to the number of notches in the housing, and is not suitable for precise continuous adjustment.
  • the factory setting of the trigger threshold electromagnetic associated with miniature circuit breakers can still be performed by means of the choice of the hardness of the return spring of the movable core.
  • Each trigger curve is assigned a predetermined spring, the opposing force of which determines the trigger threshold. This type of known triggers generates storage and manufacturing management problems.
  • the tripping threshold of certain electromagnetic tripping devices is adjustable by the user by means of a button ensuring either a variation of the air gap or an adjustment of the spring tension reminder. After adjustment, the button is immobilized in rotation, and at the same time displays the triggering threshold.
  • Such a client adjustment system cannot be inviolable, since the button must be operational at all times to modify the trigger characteristics.
  • the object of the invention is to improve the factory setting of an electrical appliance with a rotary button.
  • the adjustment device is characterized in that the locking means comprises a first mechanical locking pin arranged to be pressed along the lateral surface of the button independently of its angular adjustment position, the button and the pin locking being made with materials of different hardness allowing an incrustation effect during the insertion phase, to make the adjustment device inviolable.
  • the locking means comprises a second pin centered on the axis of the rotary button with a predetermined angular offset relative to the first pin.
  • the adjustment phases of the button and pushing in of the two pins can be carried out by an automatic machine at the end of assembly of the circuit breaker, and after closing of the molded case.
  • the two locking pins come from molding with the second half-shell while remaining attached to the latter by breakable zones.
  • the two locking pins protrude from the large lateral face of the second half-shell, and are angularly distributed around a circular orifice, in which the actuation head of the adjustment button adapts during the assembly of the two half-shells.
  • This adjustment system can be used to adjust the trigger threshold of an electromagnetic trip device, by adjusting the preload of the return spring associated with the movable core.
  • a miniature electric circuit breaker 10 is housed in a molded insulating casing 12, formed by the assembly of two half-shells 11, 13 delimiting a front face 14 crossed by a lever 16, a rear face 18 equipped with a snap-on base 20 for mounting on a fixing rail, and two large side faces 22,24.
  • the circuit breaker 10 comprises a pair of connection terminals 26, 28 (FIG. 3) and a separable contact device (not shown), the movable contact of which is actuated by a control mechanism of the type described in French patents 8708037 and 2.605. 454.
  • thermomagnetic trip device having a bimetallic strip (not shown) and an electromagnetic trip device 30 (FIGS. 3 and 9) sensitive respectively to overload and short-circuit currents.
  • the electromagnetic trip device 30 is formed by an electromagnet with a plunging core comprising a cylindrical coil 32, mounted coaxially on a tubular insulating sheath 34, inside of which moves in translation a movable core 36 cooperating with a fixed core 38.
  • the movable core 36 is provided with a trigger rod 40 passing through an axial bore of the fixed core 38.
  • the end of the rod 40 is shaped as a striker 42 intended to cooperate with the trigger lever to ensure the unlocking of the coupling, and with the contact arm to cause rapid movement of the movable contact to the open position in the event of a short circuit.
  • the sleeve assembly 34, coil 32 and core 36, 38 is positioned on a U-shaped ferromagnetic yoke 43.
  • the movable core 36 Opposite the trigger rod 40, the movable core 36 includes an annular notch 44 for housing a strand 46 of return spring 48 (FIG. 9).
  • the coil 32 When the circuit breaker 10 is in service, the coil 32 is continuously traversed by the nominal current flowing between the two terminals 26,28. The opposing force of the return spring 48 outweighs the electromagnetic attraction force exerted in the air gap 50 for separating the two cores 36, 38.
  • the movable core 36 is urged into engagement against a stop 52 of the half-shell 11, and the striker 42 remains inactive in this position away from the core 36.
  • the excitation current of the coil 32 increases, and causes the attraction of the movable core 36 against the fixed core 38, as soon as the magnetic tripping threshold is exceeded.
  • the striker 42 is rapidly propelled to the right in the attracted position of the movable core 36, to control the triggering of the mechanism (see dotted lines in FIG. 9).
  • the magnetic trigger threshold of the trigger electromagnetic 30 depends on the preload of the return spring 48 which determines the return force antagonistic to the magnetic attraction force of the movable core 36.
  • the return spring is formed by a torsion spring threaded on a positioning axis 54 integral with the first half-shell 11. Opposite the strand 46 for holding the movable core 36 against the stop 52, the spring 48 is equipped with a control tab 56 inserted in a drive notch formed in an adjustment knob 58 rotary.
  • the adjustment button 58 is mounted on the axis 54, and includes an actuating head 60 of circular shape, which fits like a plug in a conjugate orifice 62 opening onto the lateral face 24 of the second half-shell 13
  • the circumferential periphery of the plug or adjustment knob 58 is equipped with ridges 64 capable of cooperating with two locking pins 66,68, so as to ensure a rotation lock of the adjustment plug 54 after adjusting the tension of the return spring. 48.
  • the actuating head 60 is provided with a blind hole 67 of polygonal or cruciform section (FIG. 7).
  • the adjustment button 58 is made by molding a very hard plastic material, while the insulating housing 12 is molded with a more flexible plastic material.
  • the material of the adjustment plug 58 is a polyarylamide with a filler based on glass fibers.
  • the material of the housing 12 is a polyamide with the addition of a mineral filler.
  • the two locking pins 66,68 come directly from molding with the half-shell 13 (see FIGS. 4 to 6) of the housing 12.
  • the two pins 66,68 are projecting by extending perpendicular to the face 24, and remain attached to the half-shell 13 by breakable zones 70 (FIGS. 2 and 6).
  • a striking action on the pins 66,68 causes the breakable zones 70 to break, followed by the penetration of the pins 66,68 in the housing 12, in the direction of insertion indicated by the arrows F1 (figure 7). This results in immobilization in rotation of the adjustment plug 58, due to the notching effect of the locking pins 66, 68 made of flexible material, with the ridges 64 of the plug 58 made of hard material.
  • the insertion precision of the locking pins 66, 68 results from the presence of guide grooves 72, 74 (FIG. 6) in the half-shell 13.
  • the two locking pins 66,68 are substantially centered on the axis 54, with a predetermined angular offset, in particular between 90 and 180 degrees.
  • the driving in of the two pins 66, 68 generates a resulting radial force F2 (FIG. 8), which urges the plug 58 against a bearing surface 78 of a fixed boss 76 belonging to the half-shell 13.
  • the setting mode of the electromagnetic trip device 30 is carried out as follows:
  • the return spring 48 of the trip device 30 is threaded on the axis 54 with insertion of the strand 46 into the notch 44 of the movable core 36.
  • the adjustment plug 58 is then introduced on the axis 54 above the spring 48, followed by the coupling with the control tab 56.
  • the other half-shell 13 serving as a cover is attached to the half-shell 11, and rivets 80 , two of which are shown in FIG. 1, ensure the final assembly of the circuit breaker 10.
  • the head 60 for actuating the adjustment plug 58 is engaged in the circular orifice 62 of the half-shell 13.
  • the strand 46 urges the movable core 36 into engagement against the stop 52, and the adjustment button 58 is in an initial position corresponding to a minimum value of the magnetic trip threshold.
  • the adjustment of said threshold to a predetermined value is effected by rotation of the head 60 of the plug 58 in a clockwise direction (see arrow F3, FIG. 9) to a desired adjustment position.
  • the immobilization of the plug 58 in its adjustment position is then carried out during a second phase, by driving in the two locking pins 66,68, causing an inlay of the ridges 64 in the vertical faces of the pins 66,68.
  • the adjustment and blocking operation of the adjustment plug 58 is carried out at the factory, and lends itself well to automation.
  • the plug adjustment device 58 is tamper-proof after the two pins 66,68 have been inserted.
  • the electromagnetic trip units 30 are standard for a range of circuit breakers having different tripping curves. It suffices to adapt the magnetic tripping threshold at the end of assembly by means of a preset calibration of the return spring 48.
  • a different number of locking pins 66,68 can be used to block the adjustment plug 58 in rotation. These pins can be arranged on a separate piece automatically set up by the machine at the end of the plug 58 adjustment operation.
  • the incrustation of the ridges in the locking pins 66, 68 allows precise continuous adjustment of the adjustment plug 58, regardless of its immobilized position.
  • the tamper-resistant adjustment device according to the invention can also be used for adjusting bimetallic strips and in other electrical devices with molded insulating housings, in particular relays or contactors equipped with rotary adjustment selectors or switches.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Breakers (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
EP19890420487 1989-01-11 1989-12-12 Unverletzliche Regelungsvorrichtung eines elektrischen Gerätes Expired - Lifetime EP0378030B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8900352A FR2641644B1 (fr) 1989-01-11 1989-01-11 Dispositif de reglage inviolable d'un appareil electrique
FR8900352 1989-07-05

Publications (2)

Publication Number Publication Date
EP0378030A1 true EP0378030A1 (de) 1990-07-18
EP0378030B1 EP0378030B1 (de) 1994-04-27

Family

ID=9377684

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19890420487 Expired - Lifetime EP0378030B1 (de) 1989-01-11 1989-12-12 Unverletzliche Regelungsvorrichtung eines elektrischen Gerätes

Country Status (4)

Country Link
EP (1) EP0378030B1 (de)
DE (1) DE68914970T2 (de)
ES (1) ES2055144T3 (de)
FR (1) FR2641644B1 (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0518791A1 (de) * 1991-06-14 1992-12-16 Schneider Electric Sa Elektromagnetischer Auslöser mit Schlagbolzen
DE19946206A1 (de) * 1999-09-27 2000-11-23 Siemens Ag Überstromauslöser
WO2003094188A1 (en) * 2002-05-01 2003-11-13 Eaton Corporation Adjustable magnetic trip assembly for circuit breaker
EP1544886A2 (de) * 2003-12-19 2005-06-22 Siemens Aktiengesellschaft Schutzschaltvorrichtung mit einstellbarer Charakteristik
CN101677046B (zh) * 2008-09-18 2011-09-14 上海工程技术大学 一体化螺钉螺母调节锁紧装置
EP2701174A1 (de) * 2012-08-22 2014-02-26 Siemens Aktiengesellschaft Miniaturleistungsschalter
CN104916503A (zh) * 2015-06-18 2015-09-16 温州市新蓝天电器有限公司 断路器的动触头组件装配装置
CN115763163A (zh) * 2022-12-05 2023-03-07 苏州司巴克自动化设备股份有限公司 一种微型断路器手柄扭簧组装工艺及其设备

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE814312C (de) * 1949-04-02 1951-09-20 Kloeckner Moeller Elek Zitaets Anordnung zum Eichen von thermischen Ausloesern, z. B. fuer elektrische Schalter
DE1026838B (de) * 1956-09-19 1958-03-27 Felten & Guilleaume Carlswerk Anordnung zur Eichung von thermischen Ausloeseelementen, insbesondere Bimetallrelais
US3593234A (en) * 1970-02-09 1971-07-13 Cutler Hammer Inc Trip adjustment means for instantaneous trip circuit breaker
US3831120A (en) * 1973-11-08 1974-08-20 Gen Electric Trip unit having improved trip adjustment indicator and circuit breaker incorporating same
GB1401181A (en) * 1971-10-19 1975-07-16 Crabtree & Co Ltd J A Circuit breakers and the like electrical products
GB2169139A (en) * 1984-12-06 1986-07-02 Mitsubishi Electric Corp Overcurrent relays

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE814312C (de) * 1949-04-02 1951-09-20 Kloeckner Moeller Elek Zitaets Anordnung zum Eichen von thermischen Ausloesern, z. B. fuer elektrische Schalter
DE1026838B (de) * 1956-09-19 1958-03-27 Felten & Guilleaume Carlswerk Anordnung zur Eichung von thermischen Ausloeseelementen, insbesondere Bimetallrelais
US3593234A (en) * 1970-02-09 1971-07-13 Cutler Hammer Inc Trip adjustment means for instantaneous trip circuit breaker
GB1401181A (en) * 1971-10-19 1975-07-16 Crabtree & Co Ltd J A Circuit breakers and the like electrical products
US3831120A (en) * 1973-11-08 1974-08-20 Gen Electric Trip unit having improved trip adjustment indicator and circuit breaker incorporating same
GB2169139A (en) * 1984-12-06 1986-07-02 Mitsubishi Electric Corp Overcurrent relays

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0518791A1 (de) * 1991-06-14 1992-12-16 Schneider Electric Sa Elektromagnetischer Auslöser mit Schlagbolzen
FR2677807A1 (fr) * 1991-06-14 1992-12-18 Merlin Gerin Declencheur electromagnetique a percuteur.
DE19946206A1 (de) * 1999-09-27 2000-11-23 Siemens Ag Überstromauslöser
WO2003094188A1 (en) * 2002-05-01 2003-11-13 Eaton Corporation Adjustable magnetic trip assembly for circuit breaker
EP1544886A2 (de) * 2003-12-19 2005-06-22 Siemens Aktiengesellschaft Schutzschaltvorrichtung mit einstellbarer Charakteristik
EP1544886A3 (de) * 2003-12-19 2007-12-19 Siemens Aktiengesellschaft Schutzschaltvorrichtung mit einstellbarer Charakteristik
CN101677046B (zh) * 2008-09-18 2011-09-14 上海工程技术大学 一体化螺钉螺母调节锁紧装置
EP2701174A1 (de) * 2012-08-22 2014-02-26 Siemens Aktiengesellschaft Miniaturleistungsschalter
CN103632899A (zh) * 2012-08-22 2014-03-12 西门子公司 微型断路器
CN103632899B (zh) * 2012-08-22 2016-11-09 西门子公司 微型断路器
CN104916503A (zh) * 2015-06-18 2015-09-16 温州市新蓝天电器有限公司 断路器的动触头组件装配装置
CN115763163A (zh) * 2022-12-05 2023-03-07 苏州司巴克自动化设备股份有限公司 一种微型断路器手柄扭簧组装工艺及其设备
CN115763163B (zh) * 2022-12-05 2023-09-29 苏州司巴克自动化设备股份有限公司 一种微型断路器手柄扭簧组装工艺及其设备

Also Published As

Publication number Publication date
EP0378030B1 (de) 1994-04-27
FR2641644A1 (fr) 1990-07-13
DE68914970D1 (de) 1994-06-01
ES2055144T3 (es) 1994-08-16
FR2641644B1 (fr) 1996-05-10
DE68914970T2 (de) 1994-10-13

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