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EP0390084A3 - Limit switch - Google Patents

Limit switch Download PDF

Info

Publication number
EP0390084A3
EP0390084A3 EP19900105837 EP90105837A EP0390084A3 EP 0390084 A3 EP0390084 A3 EP 0390084A3 EP 19900105837 EP19900105837 EP 19900105837 EP 90105837 A EP90105837 A EP 90105837A EP 0390084 A3 EP0390084 A3 EP 0390084A3
Authority
EP
European Patent Office
Prior art keywords
head
rotary shaft
manipulation lever
free position
secured
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
EP19900105837
Other languages
German (de)
French (fr)
Other versions
EP0390084B1 (en
EP0390084A2 (en
Inventor
Kunio C/O Omron Corporation Sakamoto
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
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
Priority claimed from JP3535889U external-priority patent/JPH02126328U/ja
Priority claimed from JP1269478A external-priority patent/JP2824920B2/en
Application filed by Omron Corp filed Critical Omron Corp
Publication of EP0390084A2 publication Critical patent/EP0390084A2/en
Publication of EP0390084A3 publication Critical patent/EP0390084A3/en
Application granted granted Critical
Publication of EP0390084B1 publication Critical patent/EP0390084B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H21/00—Switches operated by an operating part in the form of a pivotable member acted upon directly by a solid body, e.g. by a hand
    • H01H21/02—Details
    • H01H21/18—Movable parts; Contacts mounted thereon
    • H01H21/22—Operating parts, e.g. handle
    • H01H21/24—Operating parts, e.g. handle biased to return to normal position upon removal of operating force
    • H01H21/28—Operating parts, e.g. handle biased to return to normal position upon removal of operating force 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
    • H01H21/285—Operating parts, e.g. handle biased to return to normal position upon removal of operating force 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 having an operating arm actuated by the movement of the body and mounted on an axis converting its rotating movement into a rectilinear switch activating movement
    • 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
    • H01H13/26—Snap-action arrangements depending upon deformation of elastic members
    • H01H13/36—Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs
    • H01H13/365—Snap-action arrangements depending upon deformation of elastic members using flexing of blade springs having a symmetrical configuration

Landscapes

  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Control Of Eletrric Generators (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Abstract

A limit switch comprising a case (1) housing a switching unit (2), a head (3) secured to one end of the case, a rotary shaft (4) rotatably supported by the head and having a flat portion (14), a manipulation lever (7) secured at a butt end thereof to the rotary shaft which supports at a tip (7B) end thereof roller (8) means for detecting an object, a return coil spring (16) provided in the head which applies a force through a return plunger (15) to the flat portion of the rotary shaft to return the manipulation lever to a free position, a disk cam (19) secured to the rotary shaft and having a projection (30) formed on a peripheral portion thereof in a position corresponding to the free position of the manipulation lever, manipulation plunger means for the switching unit which is driven in response to rotary movement of disk cam and elastic stopper means (31) disposed in the head for contacting the projection of disk cam and for braking the manipulation lever when manipulation lever is returned to the free position, whereby the lever is prevented from being swung back beyond the free position. Therefore, the switching unit is prevented from chattering.
EP90105837A 1989-03-28 1990-03-27 Limit switch Expired - Lifetime EP0390084B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP3535889U JPH02126328U (en) 1989-03-28 1989-03-28
JP35358/89U 1989-03-28
JP1269478A JP2824920B2 (en) 1989-10-17 1989-10-17 Limit switch
JP269478/89 1989-10-17

Publications (3)

Publication Number Publication Date
EP0390084A2 EP0390084A2 (en) 1990-10-03
EP0390084A3 true EP0390084A3 (en) 1992-03-04
EP0390084B1 EP0390084B1 (en) 1996-07-10

Family

ID=26374336

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90105837A Expired - Lifetime EP0390084B1 (en) 1989-03-28 1990-03-27 Limit switch

Country Status (3)

Country Link
EP (1) EP0390084B1 (en)
AT (1) ATE140338T1 (en)
DE (1) DE69027696T2 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0539005A1 (en) * 1991-09-14 1993-04-28 Omron Corporation Limit switch
CN103197726A (en) * 2012-01-06 2013-07-10 沈阳新松机器人自动化股份有限公司 Travel limit mechanism based on microswitches
CN103192382B (en) * 2012-01-06 2015-06-03 沈阳新松机器人自动化股份有限公司 Stroke limiting mechanism based on magnetic force
JP6866864B2 (en) * 2018-03-14 2021-04-28 オムロン株式会社 Limit switch
DE102020104577B3 (en) * 2020-02-21 2021-01-21 Alpha Deuren International Bv Electrical switching element

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1920273A1 (en) * 1969-04-22 1970-11-12 Bernstein Hans Spezialfabrik Actuating device for limit switch
US3749860A (en) * 1971-12-30 1973-07-31 Allen Bradley Co Sealed limit switch
US3829637A (en) * 1973-01-02 1974-08-13 Gen Electric Limit switch having mechanism to eliminate unwanted reactivation thereof
US3959614A (en) * 1974-10-07 1976-05-25 Allen-Bradley Company Limit switch rotary return mechanism
GB2095915A (en) * 1981-03-30 1982-10-06 Omron Tateisi Electronics Co Limit switch assemblies

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1920273A1 (en) * 1969-04-22 1970-11-12 Bernstein Hans Spezialfabrik Actuating device for limit switch
US3749860A (en) * 1971-12-30 1973-07-31 Allen Bradley Co Sealed limit switch
US3829637A (en) * 1973-01-02 1974-08-13 Gen Electric Limit switch having mechanism to eliminate unwanted reactivation thereof
US3959614A (en) * 1974-10-07 1976-05-25 Allen-Bradley Company Limit switch rotary return mechanism
GB2095915A (en) * 1981-03-30 1982-10-06 Omron Tateisi Electronics Co Limit switch assemblies

Also Published As

Publication number Publication date
DE69027696T2 (en) 1997-03-06
ATE140338T1 (en) 1996-07-15
EP0390084B1 (en) 1996-07-10
DE69027696D1 (en) 1996-08-14
EP0390084A2 (en) 1990-10-03

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