Hand window latch

Hand window latch

  • CN 101,131,061 B
  • Filed: 08/25/2006
  • Issued: 01/11/2012
  • Est. Priority Date: 08/25/2006
  • Status: Active Grant
First Claim
Patent Images

1. hand window latch comprises that base, crank, worm screw, end have the gear arm and the gear arm fixed axis of worm gear;

  • Base comprises installation portion and the operating member that is connected as a single entity, and installation portion is provided with and the fixing installing hole of forms, and operating member one end is provided with skewed slot, and worm screw is placed in the skewed slot, and the upper end is connected with crank, and the operating member bottom is provided with gear arm fixing hole;

    The worm gear of gear arm is inserted in the operating member and worm engaging, and this worm gear has centre bore, fixes through gear arm fixed axis and gear arm fixing hole;

    It is characterized in that;

    Said operating member have one can ccontaining gear arm the cavity of worm gear, cavity is provided with notch at operating member and installation portion adjacent, the worm gear of gear arm end is inserted in this cavity through this notch;

    Said gear arm fixed axis is made up of bolt, and said bolt comprises lug boss, fixed part and the spiro union portion that diameter increases successively;

    Spiro union portion is provided with external screw thread, and spiro union portion and fixed part junction form lower convex platform, and fixed part and lug boss junction form convex platform;

    Bolt is locked in the gear arm fixing hole, and the cavity top of base is supported on its convex platform top, and its fixed part wears in the worm gear centre bore, and the limit of the worm gear centre bore of gear arm is supported on its lower convex platform top;

    Also comprise a cover plate and a rotating mechanism, turning base one side of being located at of said cover plate, said rotating mechanism comprises the pin of the prong with holes of being located at the crank shank, the connecting hole of being located at the worm screw upper end and connection prong and worm screw upper end;

    Said crank is deployable to be horizontally-arranged on the base to drive the worm screw rotation, perhaps to fold, and cover plate can be covered with base, covers crank and worm screw.

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