Keyboard touch detector of keyboard instruments

Keyboard touch detector of keyboard instruments

  • CN 101,288,114 B
  • Filed: 04/07/2006
  • Issued: 02/25/2015
  • Est. Priority Date: 09/15/2005
  • Status: Active Grant
First Claim
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1. a contact detecting apparatus for keyboard instrument, for detecting the contact information of the pressing key information comprising key free to rotate, it is characterized in that, this device comprises:

  • Optical gate, its rotation with above-mentioned key and rotating;

    Multiple optical sensor, it is arranged near the rotation path of this optical gate, and in the both sides of this rotation path, has illuminating part respectively, and carries out photosensitive photographic department to the light penetrated from this illuminating part;

    Contact information testing agency, it is when above-mentioned key rotates, and according to the photosensitive presence or absence of the corresponding above-mentioned photographic department of the opening and closing of the light path of the light of the above-mentioned illuminating part from above-mentioned multiple optical sensor with above-mentioned optical gate, detects above-mentioned contact information;

    Wherein,For 2 that adjoin in above-mentioned multiple optical sensor, be arranged so that wherein the illuminating part of an optical sensor and the photographic department of another optical sensor adjoin at the rear side of the rotation path of optical gate, and the photographic department of the illuminating part of another optical sensor and an optical sensor is adjacent in the front side of the rotation path of optical gateThe illuminating part of each optical sensor and light accepting part are arranged in opposed facing mode in the shell of U-shaped,Reflected by above-mentioned optical gate from the light of the illuminating part of another optical sensor above-mentioned under the state of the light path of an above-mentioned optical sensor being closed by above-mentioned optical gate to stop and arrive the situation of the photographic department of an above-mentioned optical sensor by mistake, above-mentioned optical gate is formed according to the mode making the light quantity of the light reflected by this optical gate reduce.

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