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EP1431998A2 - Dispositif de commutation de sécurité - Google Patents

Dispositif de commutation de sécurité Download PDF

Info

Publication number
EP1431998A2
EP1431998A2 EP03257590A EP03257590A EP1431998A2 EP 1431998 A2 EP1431998 A2 EP 1431998A2 EP 03257590 A EP03257590 A EP 03257590A EP 03257590 A EP03257590 A EP 03257590A EP 1431998 A2 EP1431998 A2 EP 1431998A2
Authority
EP
European Patent Office
Prior art keywords
slidable rod
housing
safety
handle
button
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Withdrawn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
EP03257590A
Other languages
German (de)
English (en)
Other versions
EP1431998A3 (fr
Inventor
Xiahong Zha
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.)
Positec Power Tools Suzhou Co Ltd
Original Assignee
Positec Power Tools Suzhou Co Ltd
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 Positec Power Tools Suzhou Co Ltd filed Critical Positec Power Tools Suzhou Co Ltd
Publication of EP1431998A2 publication Critical patent/EP1431998A2/fr
Publication of EP1431998A3 publication Critical patent/EP1431998A3/fr
Withdrawn legal-status Critical Current

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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
    • H01H21/26—Operating parts, e.g. handle biased to return to normal position upon removal of operating force adapted for operation by a part of the human body other than the hand, e.g. by foot
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H3/00—Mechanisms for operating contacts
    • H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
    • H01H3/20—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch wherein an auxiliary movement thereof, or of an attachment thereto, is necessary before the main movement is possible or effective, e.g. for unlatching, for coupling

Definitions

  • the present invention relates to a safety switch device.
  • a conventional safety switch device comprises a housing, a handle pivotally connected to the housing via an internal pivot, an electric switch accommodated within the housing, a pressing member in the housing for activating the switch and a safety press-button slidably provided on the housing.
  • the pressing member is fixed on a slideable rod which is inserted in a guiding groove on the interior of the housing. An inner portion of the handle inside the housing presses against the slidable rod. When the safety press-button is not depressed, it presses against the lateral side portion of the inner portion of the handle such that the handle cannot be rotated by the operator (the safety position).
  • the safety press-button When the safety press-button is depressed, it moves apart from the lateral side portion of the inner portion of the handle so that the handle can be rotated about the pivot to cause the inner portion of the handle to press down the slidable rod and cause the pressing member to activate the electric switch (the non-safety position).
  • the handle and the electric switch By wholly constraining the handle in the safety position, there is a risk that the handle and the electric switch may be damaged wholly or partly if the operator forcibly wrenches the handle.
  • the present invention seeks to ensure that the handle and other components of a safety switch device cannot be damaged when the safety press-button is in a safety position by giving the arrangement for activating the electric switch an additional degree of freedom.
  • the arrangement for activating the electric switch when the safety press button is in the safety position is free to move non-linearly and when the safety press button is in the non-safety position is free to move linearly only.
  • safety switch device comprising:
  • the present invention relates to a safety switch device comprising a housing and a handle pivotally connected to the housing via a pivot.
  • An electric switch is accommodated within the housing.
  • a safety press-button is slidably provided on the housing.
  • a pressing member is fixedly mounted on a slideable rod in the housing.
  • An internal portion of the handle presses against the slidable rod.
  • the slidable rod is inserted in a guiding groove on the interior of the housing. A clearance between the slidable rod in the guiding groove and the edge of the guiding groove is sufficient to advantageously permit the slidable rod to swing in the guiding groove when the safety press-button is in the non-depressed state.
  • the safety press-button has at least two working positions.
  • the present invention provides a safety switch device comprising a housing, a handle pivotally connected to the housing via a pivot, an electric switch accommodated within the housing, a pressure member provided in the housing, a safety press-button slidably provided on the housing, the pressure member fixedly mounted on a slidable rod which is inserted in a guiding groove disposed on the interior of the housing, an inner handle partly composed of a portion of the handle inserted into the housing and pressing against the slidable rod, characterized in that:
  • FIGs 1-3 illustrate an embodiment of the safety switch device of the present invention in various operating positions and with the cover 40 (see Figure 4) removed for convenience.
  • the safety switch device comprises a housing 9 upon which is mounted (on an internal pivot 2) an externally extending handle 13 and in which is accommodated a pressure activatable electric switch 10.
  • a pressing member 8 is fixed on a slidable rod 12 which is inserted in a guiding groove in the interior of the housing 9. There are clearances 1 and 11 between the slideable rod 12 and the walls of the guiding groove.
  • An engagement surface 5 on an internal portion 6 of the handle 13 presses against a curved surface 4 on an end portion of the slidable rod 12 so as to permit the slidable rod 12 to swing or move linearly (depending on the position of a safety press-button 3 - see below).
  • the safety press-button 3 is slidably provided on the housing 9 and is shown in isolation in Figures 4 and 5.
  • the safety press-button 3 comprises a main body 42 from which depends an arm 43.
  • the safety press-button 3 has two working positions which advantageously leave the movement of the handle 13 unfettered. In the first working position, the safety press-button 3 is depressed and the arm 43 engages the lateral edge of the slideable rod 12. In the second working position, the safety press-button 3 is not depressed and the arm 43 is spaced apart from the lateral edge of the slideable rod 12.
  • a retaining hook 41 retains the safety press button 3 in the housing 9. With the assistance of the guiding member 14, the safety press-button switches between the first and second press button.
  • the safety switch device itself has essentially three operating positions.
  • a spring 7 retains the slideable rod 12 in the guiding groove and generally biases the safety switch device to the third operating position illustrated in Figure 3.

Landscapes

  • Mechanisms For Operating Contacts (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Breakers (AREA)
EP03257590A 2002-12-16 2003-12-02 Dispositif de commutation de sécurité Withdrawn EP1431998A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN02287611U CN2593341Y (zh) 2002-12-16 2002-12-16 安全开关
CN02287611 2002-12-16

Publications (2)

Publication Number Publication Date
EP1431998A2 true EP1431998A2 (fr) 2004-06-23
EP1431998A3 EP1431998A3 (fr) 2006-02-01

Family

ID=29746757

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03257590A Withdrawn EP1431998A3 (fr) 2002-12-16 2003-12-02 Dispositif de commutation de sécurité

Country Status (2)

Country Link
EP (1) EP1431998A3 (fr)
CN (1) CN2593341Y (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11638397B2 (en) 2020-02-10 2023-05-02 Techtronic Cordless Gp Control assembly coupled to handle of an implement
US12108702B2 (en) 2012-10-15 2024-10-08 Chervon (Hk) Limited Gardening tool, particularly a mower
US12279552B2 (en) 2021-12-08 2025-04-22 Honda Motor Co., Ltd. Blade control assembly, lawnmower, and method for operating a blade control assembly
US12364192B2 (en) 2012-10-15 2025-07-22 Chervon (Hk) Limited Lawncare apparatus

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111029200B (zh) * 2020-01-07 2020-11-06 国网上海市电力公司 一种便于更换保险丝的电流过载保护闸刀

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3006405A1 (de) * 1980-02-21 1981-08-27 Gardena Kress + Kastner Gmbh, 7900 Ulm Elektrisch betriebenes handgeraet
DE8414594U1 (de) * 1984-05-12 1985-10-10 Schulte-Elektrotechnik GmbH & Co KG, 5880 Lüdenscheid Schalteranordnung mit Einschaltsperre
DE8511477U1 (de) * 1985-04-18 1986-03-06 TRIPUS-Kunststoffteile GmbH, 8870 Günzburg Vorrichtung zum Ein- und Ausschalten von Elektrogeräten
DE3926098C2 (de) * 1989-08-08 1995-08-10 Brill Produktions Gmbh Einschaltvorrichtung für elektrisch betreibbare Geräte
JP3329654B2 (ja) * 1996-03-22 2002-09-30 株式会社マキタ 電動芝刈機の操作スイッチ
GB2316458A (en) * 1996-08-23 1998-02-25 Electrolux Outdoor Prod Ltd A switch actuating mechanism having lost motion means

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US12108702B2 (en) 2012-10-15 2024-10-08 Chervon (Hk) Limited Gardening tool, particularly a mower
US12364192B2 (en) 2012-10-15 2025-07-22 Chervon (Hk) Limited Lawncare apparatus
US11638397B2 (en) 2020-02-10 2023-05-02 Techtronic Cordless Gp Control assembly coupled to handle of an implement
US12279552B2 (en) 2021-12-08 2025-04-22 Honda Motor Co., Ltd. Blade control assembly, lawnmower, and method for operating a blade control assembly

Also Published As

Publication number Publication date
EP1431998A3 (fr) 2006-02-01
CN2593341Y (zh) 2003-12-17

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