| 摘要 |
PURPOSE:To prevent a reflection by an interface to the body surface of a body to be inspected of an ultrasonic wave radiated from a vibrator, by forming an ultrasonic transmission part which contacts the body to be inspected, by the copolymer resin of a polyamide block and a polyether ester block. CONSTITUTION:A sound absorbing material 2 to which a vibrator 3 consisting of a piezoelectric material such as PZT, etc., is provided in a case 8, and constituted so as to execute an oscillating motion by using a point '0' as a fulcrum in the figure. The rotary motion of a motor 5 fixed to a base 6 is converted by a motion converting mechanism 7, and the sound absorbing material 2, that is, the vibrator 3 is brought to the oscillating motion. The case 8 consists of the lower side case part 8a and the upper side case part 8b, and an ultrasonic transmission part which contacts the body surface of a body to be inspected of the lower side case part 8a is formed by the copolymer resin of the polyamide block and the polyether block. As for the copolymer resin of the polyamide block and the polyether block, both the acoustic impedance and the sound velocity are values being near those of the body surface of the human body, respectively, therefore, there is scarcely the possibility that the performance is deteriorated due to the increase in the thickness.
|
