摘要 |
PROBLEM TO BE SOLVED: To provide an arm type oral cavity expanding machine which can continuously expand the cheeks of a patient without holding a mirror for a medical treatment by a dentist or the like. SOLUTION: To a first air cylinder 34 of this arm type oral cavity expanding machine 10, a first arm 36 is fixed. Then, the distal end 36B of the first arm 36 is fixed to a second air cylinder 38. The second air cylinder 38 is supported by a second air cylinder-supporting bracket 40, and a second arm 42 is fixed to the second air cylinder-supporting bracket 40. The distal end 42B of the second arm 42 is fixed to a third air cylinder-supporting bracket 44, and a third air cylinder 46 is supported by the third air cylinder-supporting bracket 44. A third arm 48 is fixed to the third air cylinder 46, and a mirror 53 for a medical treatment is attached to the distal end of the third arm 48.
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