Daicel Corporation

Toshiki Yagi

Masayuki Ueda

Masahiro Haitsuka

The described technology relates to a needleless syringe for injecting an injection objective substance into an injection target area. The needleless syringe includes a protruding member which is provided movably from a first position to a second position at which 1) a protruding length of a forward end of the protruding member from an end surface of a housing is shorter than a protruding length of the forward end at the first position and 2) the forward end and a discharge port can be brought in contact with the injection target area. The needleless syringe also includes a maintaining mechanism which maintains the protruding member at the first position and a power source circuit which applies a voltage to a driving unit when the protruding member having been maintained at the first position is moved to the second position. Accordingly, the unintended discharge from the syringe is appropriately avoided.

Needleless syringe

A syringe includes a holding portion that accommodates an injection objective substance, a driving portion that applies injection energy, and a nozzle portion that includes a passage for injection, with these portions being loaded into a housing independently, whereby a state where the injection objective substance can be injected is established. The syringe includes a regulating means for regulating a loading position of the holding portion and the driving portion within the housing so that a loading state, where the holding portion and the driving portion are always loaded in the same order into the housing, is established for injection of the injection objective substance. Due to this, it is possible to facilitate injection of injection liquid ideal for various purposes and to improve user's convenience.

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Himeji, Japan

Toshiki Yagi