EP0411331A2 - Switch contact arrangement - Google Patents

Switch contact arrangement Download PDF

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Publication number
EP0411331A2
EP0411331A2 EP19900112606 EP90112606A EP0411331A2 EP 0411331 A2 EP0411331 A2 EP 0411331A2 EP 19900112606 EP19900112606 EP 19900112606 EP 90112606 A EP90112606 A EP 90112606A EP 0411331 A2 EP0411331 A2 EP 0411331A2
Authority
EP
European Patent Office
Prior art keywords
piece
terminal
contact
terminal piece
switch
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.)
Withdrawn
Application number
EP19900112606
Other languages
German (de)
English (en)
French (fr)
Inventor
Junryo C/O Omron Corporation Nariai
Kazuya C/O Omron Corporation Tsuge
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.)
Omron Corp
Original Assignee
Omron Corp
Omron Tateisi Electronics Co
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 Omron Corp, Omron Tateisi Electronics Co filed Critical Omron Corp
Publication of EP0411331A2 publication Critical patent/EP0411331A2/en
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/0056—Apparatus or processes specially adapted for the manufacture of electric switches comprising a successive blank-stamping, insert-moulding and severing operation
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/14—Operating parts, e.g. push-button
    • H01H13/18—Operating parts, e.g. push-button adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
    • H01H13/186—Operating parts, e.g. push-button adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift wherein the pushbutton is rectilinearly actuated by a lever pivoting on the housing of the switch
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
    • H01H13/02—Details
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/14—Operating parts, e.g. push-button
    • H01H13/18—Operating parts, e.g. push-button adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift

Definitions

  • the present invention relates to a switch contact mechanism which may be used, for instance, in a limit switch, and in particular to such a switch contact mechanism which is reliable in operation and easy to manufacture.
  • fixed terminals a and b, and a common terminal c are arranged in prescribed locations of a switch base 20 with one end of each of these terminals projecting outwards, and fixed contact pieces 21 and 22 are secured to the other ends of the fixed terminals a and b, respectively, by spot welding while a moveable contact piece 23 is secured to the other end of the common terminal c by crimping a rivet 24.
  • a cover 25 carrying a push-button 26 so as to be slidable along its axial direction is fitted upon the switch base 20.
  • the switch contact mechanism of this switch since the fixed contact piece 21 and the fixed terminal a, the fixed contact piece 22 and the fixed terminal b, and the moveable contact piece 23 and the common terminal c are connected together by crimping, spot welding or other securing means, they may generate heat when they are not properly connected together. Also, as there are a large number of component parts which are required to be fixed to each other, additional facilities are required in the manufacturing line, and the manufacturing cost tends to rise because of the difficulty to achieve a simple one-­line manufacturing process.
  • a primary object of the present invention is to provide a switch contact mechanism which eliminates the possibility of generating heat due to poor contact between mechanically joined parts, for instance between a moveable contact piece and a common terminal which are intended to be securely attached to each other, of the switch contact mechanism.
  • a second object of the present invention is to provide a switch contact mechanism which is reliable in operation.
  • a third object of the present invention is to provide a switch contact mechanism which is easy to manufacture.
  • a switch contact mechanism comprising: a first terminal piece and a second terminal piece which are planar in shape and disposed on a common plane; a casing including a switch base made of resin material supporting the terminal pieces in spaced relationship with both ends of each of the terminal pieces exposed; a moveable contact piece cut out of an end of the first terminal piece and carrying a moveable contact at its free end; a fixed contact piece cut out of an end of the second terminal piece and carrying a fixed contact opposite to the moveable contact at its free end; and an actuating member moveably supported by the casing for acting upon the moveable contact piece so as to bring the moveable contact into contact with the fixed contact.
  • each of the terminal piece and contact piece assemblies thus consists of an integral member, and there is no risk of poor contact. Further, since the fixed and moveable contact pieces are cut out of end portions of the first and second terminal pieces which are disposed on a common plane, it is possible to produce them in an efficient manner with a manufacturing line which forms them out of a common strip of electroconductive plate, and to reduce the manufacturing cost.
  • the first terminal piece comprises a first portion securely fixed in the switch base, a second portion bent from the first portion by approximately 90 degrees along a first folding line extending in parallel with a longitudinal line of the first terminal piece, and a third portion, projecting from the second portion and serving as the moveable contact piece, bent toward the second terminal; and the second terminal piece is provided with a first portion securely fixed in the switch base, and a second portion, serving as the fixed contact piece, bent from the first portion by approximately 90 degrees along a second folding line extending in parallel with a major surface of the second terminal piece and perpendicular to a longitudinal line of the second terminal piece.
  • Such a contact mechanism can be favorably fabricated by the method comprising the steps of: cutting out a first terminal piece, a second terminal piece and a connecting piece connecting base ends of the terminal pieces together from a strip of electroconductive plate; molding a switch base around the terminal pieces so as to secure the terminal pieces therein; bending a part of the first terminal piece intermediate between the switch base and a free end of the first terminal piece along a first folding line extending in parallel with a longitudinal line of the first terminal piece by approximately 90 degrees, and then bending a free end portion of the first terminal piece toward the second terminal; bending a free end portion of the second terminal piece along a second folding line parallel with a major surface of the plate and perpendicular to a longitudinal line of the second terminal piece by approximately 90 degrees; and cutting off the connecting piece from the terminal pieces. It may further comprise the step of stamping a projection serving as a contact in a free end portion of at least one of the terminal pieces.
  • FIG. 1 shows an example in which the switch contact mechanism of the present invention is applied to a limit switch.
  • fixed terminal pieces A and B and a common terminal piece C which are planar in shape and disposed on a common plane are integrally molded with a switch base 1 made of resin material.
  • Numerals 2 and 3 denote fixed contact pieces which are cut out and bent from one end portions of the fixed terminal pieces A and B.
  • Numeral 4 denotes a moveable contact piece which is cut out and bent from one end portion of the common terminal piece C, and opposes the fixed contact pieces 2 and 3 at its free end so as to selectively come into contact with either one of them. In particular, this moveable contact piece 4 is normally in contact with the fixed contact piece 3 and spaced away from the fixed contact piece 2.
  • Numeral 5 denotes a cover which is fitted upon the switch base 1, and carries a push-button 6 thereon so as to be slidable along its axial direction.
  • a pivoted lever 7 pivotally supported by a mounting shaft 8 arranged at an end portion of the cover 5 can axially drive the push-button 6.
  • Numerals 2a and 3a denote fixed contacts, and numeral 4a denotes a moveable contact 4a.
  • the moveable contact piece 4 may be provided with a snap action mechanism by known means.
  • the switch contact mechanism of the present embodiment since there are no parts to be securely attached to each other between the moveable contact piece and the common terminal, and between the fixed contact pieces and the fixed terminals, and a relatively small number of component parts are required, it is possible to avoid the various troubles such as heat generation which would arise if the contact pieces and the terminals were made by securely attaching various component parts together.
  • the above described switch contact mechanism can be manufactured, for instance, according to the manufacturing processes indicated in Figures 2(a) through 2(e). Now, the process of manufacturing the switch contact mechanism is described in the following with reference to Figures 2(a) through 2(e).
  • the contact pieces and the terminals are made of a common strip of electroconductive plate, and are formed in a continuous manufacturing process, a highly efficient manufacturing line flow can be achieved, and the manufacturing cost can be reduced.
  • the moveable contact piece may be integral with the terminal piece, and may not be provided with a projection made of a separate member serving as a contact point to bear upon a fixed contact piece as opposed to the prior art contact mechanism, the number of component parts is reduced, and its manufacturing process is significantly simplified.

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
EP19900112606 1989-07-03 1990-07-02 Switch contact arrangement Withdrawn EP0411331A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP171556/89 1989-07-03
JP17155689A JPH0337922A (ja) 1989-07-03 1989-07-03 スイツチ接触機構

Publications (1)

Publication Number Publication Date
EP0411331A2 true EP0411331A2 (en) 1991-02-06

Family

ID=15925321

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900112606 Withdrawn EP0411331A2 (en) 1989-07-03 1990-07-02 Switch contact arrangement

Country Status (2)

Country Link
EP (1) EP0411331A2 (ja)
JP (1) JPH0337922A (ja)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0542057A2 (de) * 1991-11-11 1993-05-19 Braun Aktiengesellschaft Träger für einen elektrischen Motor einer Küchenmaschine, insbesondere Zitruspresse
DE4418707A1 (de) * 1994-05-28 1995-11-30 Teves Gmbh Alfred Schnappschalter mit gerader Bewegung des Schaltstücks sowie Schaltersystem hierzu
DE19501855A1 (de) * 1995-01-23 1996-07-25 Kostal Leopold Gmbh & Co Kg Verfahren zur Herstellung einer mehrere eigenständige elektrische Schalter aufweisenden Schalteranordnung
WO1996042097A1 (en) * 1995-06-13 1996-12-27 Mec A/S A method of producing an electrical switch
WO2003062569A1 (de) * 2002-01-23 2003-07-31 Huf Hülsbeck & Fürst Gmbh & Co. Kg Verschluss für türen, hauben, klappen od. dgl., insbesondere von fahrzeugen, wie kraftfahrzeugen
EP1858043A1 (en) * 2006-05-15 2007-11-21 Pizzato Elettrica S.r.l. Position switch with movable contacts having positive operation

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000276975A (ja) * 1999-03-23 2000-10-06 Mikku Enterprise:Kk マイクロスイッチ

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5848311A (ja) * 1981-09-17 1983-03-22 オムロン株式会社 マイクロスイツチの製造方法

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0542057A2 (de) * 1991-11-11 1993-05-19 Braun Aktiengesellschaft Träger für einen elektrischen Motor einer Küchenmaschine, insbesondere Zitruspresse
EP0542057A3 (en) * 1991-11-11 1993-12-29 Braun Ag Support for the electric motor of a kitchen machine, in particular lemon squeezer
DE4418707A1 (de) * 1994-05-28 1995-11-30 Teves Gmbh Alfred Schnappschalter mit gerader Bewegung des Schaltstücks sowie Schaltersystem hierzu
DE19501855A1 (de) * 1995-01-23 1996-07-25 Kostal Leopold Gmbh & Co Kg Verfahren zur Herstellung einer mehrere eigenständige elektrische Schalter aufweisenden Schalteranordnung
DE19501855C2 (de) * 1995-01-23 1998-12-24 Kostal Leopold Gmbh & Co Kg Verfahren zur Herstellung einer mehrere funktional eigenständige elektrische Schalter aufweisenden Schalteranordnung
WO1996042097A1 (en) * 1995-06-13 1996-12-27 Mec A/S A method of producing an electrical switch
US6205650B1 (en) 1995-06-13 2001-03-27 Mec A/S Method of producing and electrical switch
WO2003062569A1 (de) * 2002-01-23 2003-07-31 Huf Hülsbeck & Fürst Gmbh & Co. Kg Verschluss für türen, hauben, klappen od. dgl., insbesondere von fahrzeugen, wie kraftfahrzeugen
US7019233B2 (en) 2002-01-23 2006-03-28 Huf Hülsbeck & Fürst Gmbh & Co. Kg Closing device for doors, bonnets, gates or the like, especially of vehicles, such as motor vehicles
KR100930739B1 (ko) * 2002-01-23 2009-12-09 후프 휠스벡 운트 퓌르스트 게엠베하 운트 콤파니 카게 자동차와 같은 차량의 도어, 보닛, 게이트 등의 잠금장치
EP1858043A1 (en) * 2006-05-15 2007-11-21 Pizzato Elettrica S.r.l. Position switch with movable contacts having positive operation
CN101101826B (zh) * 2006-05-15 2012-07-25 皮扎托电气有限公司 带具有正向操作的动触头的位置开关

Also Published As

Publication number Publication date
JPH0337922A (ja) 1991-02-19

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