Aperture unit, lens barrel and imaging device

Aperture unit, lens barrel and imaging device

  • CN 101,750,840 A
  • Filed: 12/18/2009
  • Published: 06/23/2010
  • Est. Priority Date: 12/18/2008
  • Status: Active Application
First Claim
Patent Images

1. aperture unit comprises:

  • Tabular substructure member wherein is formed with the light path hole;

    A plurality of aperture blades, they are stacked on top of each other on the optical axis direction of optical system, described a plurality of aperture blades by described substructure member support with can along perpendicular to the plane of optical axis described aperture blades near and away from the direction of optical axis on move, and form be positioned at inboard, described light path hole, the aperture openings of center on optical axis;

    AndDriving mechanism, it regulates the size of described aperture openings by moving described a plurality of aperture blades,Wherein said driving mechanism comprises;

    be arranged on the surface of approaching described a plurality of aperture blades of described substructure member with around the rotatable annular slab of optical axis, from the outstanding a plurality of drive pins of described annular slab with the described a plurality of aperture blades of correspondence, be formed in each described a plurality of aperture blades and cam path that engages with corresponding drive pin and the motor that rotates described annular slabBe provided with dividing plate between described annular slab and described a plurality of aperture blades, described dividing plate has the light path hole that is formed at wherein and described annular slab and described a plurality of aperture blades is separated from each other, andDescribed dividing plate is formed by steel plate, and it comprises the insertion portion of insertion with supplying described drive pin clearance fit and gives prominence to described aperture blades and contact to guide a plurality of guide rails that move of described aperture blades with described aperture blades.

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