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Miniature-motor

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Miniature motor

Details

Inventors: Fujiwara, Hitoshi;
Assignee: Mabushi Motor Co., Ltd (JP)
Primary Examiner: Skudy; R.
Assistant Examiner:
Attorney, Agent or Firm: McGlew & Tuttle

A miniature motor having a metallic case with a printed circuit board installed therein. The printed circuit board has an electronic circuit, mounted thereon, for controlling the miniature motor. A lug portion is provided protruding from the edge of an open end of the metallic case. An engaging portion is provided for engaging the lug portion with an earth terminal of the printed circuit board. The earth terminal and the lug portion are electrically joined by means of soldering in a state the printed circuit board is fitted to the metallic case in such a manner as to engage the lug portion with the engaging portion.

DETAILED DESCRIPTION This invention is intended to overcome the aforementioned problems.
It is an object of this invention to provide a miniature motor having installed in a metallic case a printed circuit board having mounted thereon an electronic circuit for controlling the miniature motor, in which a lug portion protruding the edge of an open end of the metallic case, and an engaging portion for engaging the lug portion with the earth terminal of the printed circuit board are provided; the earth terminal being electrically connected to the lug portion by soldering, etc.
in a state where the printed circuit board is installed in the metallic case in such a manner as to engage the lug portion with the engaging portion.
It is another object of this invention to provide a miniature motor in which the engaging portion provided on the earth terminal has a through hole through which the lug portion is passed, and the length of the lug portion is made slightly larger than the thickness of the printed circuit board.
It is a further object of this invention to provide a miniature motor in which a notch extending from the side surface of the printed circuit board to the location of the engaging portion is provided, and the length of the lug portion is made slightly larger than the thickness of the printed circuit board.
It is a still further object of this invention to provide a miniature motor in which electromagnetic shielding at the abovementioned metallic case is effected by covering a motor case and the open end thereof with a metallic electronic circuit cover, and the engaging portion of the printed circuit board of this invention is joined to the lug portion of the motor case.
These objects and advantages of this invention will become apparent from the description made with reference to the accompanying FIGS.
1 through 3.

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