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ELECTRIC TOOTHBRUSH

  • US 20180055616A1
  • Filed: 08/30/2017
  • Published: 03/01/2018
  • Est. Priority Date: 08/31/2016
  • Status: Active Grant
First Claim
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1. An electric toothbrush, comprising a handle and a brush head, a motor being arranged in the handle, a transmission rod being arranged in the brush head, the motor being provided with a rotating shaft, the rotating shaft extending from a casing of the motor, a transmission connection member being arranged between the transmission rod and the rotating shaft of the motor, one end of the transmission connection member being connected with the rotating shaft, the other end being connected with the transmission rod, and a sealing member surrounding the rotating shaft being arranged at the rotating shaft extending position of the outer surface of the casing, wherein the sealing member extends from the outer surface of the casing of the motor to the transmission connection member, and a gap between the inside of the sealing member and the rotating shaft constitutes a first cavity;

  • an end face, facing the rotating shaft, of the transmission connection member and the outer surface of the sealing member form rotatory sealing connection;

    a second cavity is formed between the sealing member and a sleeving cavity of the transmission connection member.

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