| 摘要 |
PROBLEM TO BE SOLVED: To assemble a small size apparatus having good acoustic characteristics in which the diameter of a housing can be kept small and the thickness of the entire apparatus is controlled to be thin in particular even when projecting pieces to be an impact resisting stopper are installed. SOLUTION: A yoke 5 having the projecting pieces 50-52 to be the impact resisting stopper is provided, and springs 6 and 7 having inner wheel parts 60 and 70, outer wheel parts 61 and 71, bridge connecting arm parts 62a-62c and 72a-72c for connecting both wheel parts 60, 61, 70, and 71, and escape spaces 63a-63c and 73a-73c positioned relatively to the projecting pieces 50-52 of the yoke 5 are provided. The springs 6 and 7 are engaged with the circumference of the yoke 5 by the inner wheel parts 60 and 70 by positioning the projecting pieces of the yoke 5 relatively to the escape spaces 63a-63c and 73a-73c of the springs 6 and 7, and the springs 6 and 7 are inserted into the diameter of a housing 1 by the outer wheel parts 61 and 71, so that the springs 6 and 7 integrated with the yoke 5 are installed in the housing 1. |
