| 摘要 |
PROBLEM TO BE SOLVED: To provide a spray device which can be mass-produced at low cost as far as possible, generate high quality spray, has little difference of quality between individual devices, and can generate comparatively soft spray lasting for a prescribed time. SOLUTION: This spray device is equipped with a vessel (10) with a spray orifice (21) to contain a product. Deformation areas (11) which are deformed corresponding to pressure force to discharge a spray product through the orifice (21) are equipped on the wall of the vessel (10). The deformation areas have a prescribed threshold value relating to resistance against deformation. When the pressure force is smaller than pressure force Ps required and sufficient for overcoming the threshold value of resistance, the volume of the sprayed product is substantially zero. Deformation generated by applying force larger than pressure force Ps to the deformation areas is kept even when the pressure force becomes smaller than Ps.
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