Title:
無針注射器
Document Type and Number:
Japanese Patent JP6969021
Kind Code:
B2
Abstract:
A needleless injector according to the present disclosure includes a housing part that includes an accommodating space that accommodates a substance intended for injection and defines a flow path for ejection, a driving part that imparts ejection energy, and a plunger that defines the accommodating space and is disposed to move in the housing part by the ejection energy and pressurize the substance intended for injection. The plunger includes a weakened part that causes a part of the plunger to deform such that, when force applied to the plunger exceeds predefined force while the driving part is imparting the ejection energy with the accommodating space accommodating the substance intended for injection, a distal end of the plunger does not reach an inner wall surface at a deepest part of the housing part or force received by the inner wall surface falls within a predetermined range until the distal end of the plunger reaches the inner wall surface. With this configuration, the safety of the injection using the needleless injector is guaranteed even when pressurization by the plunger results in an unexpected amount of load.
Inventors:
Yuzo Yamamoto
Hiromitsu Iga
Hiromitsu Iga
Application Number:
JP2020562535A
Publication Date:
November 24, 2021
Filing Date:
December 27, 2019
Export Citation:
Assignee:
Daicel Corporation
International Classes:
A61M5/315; A61M5/30
Domestic Patent References:
| JP2011504765A | ||||
| JP2504112A | ||||
| JP2011524783A |
Attorney, Agent or Firm:
Hidewa Patent Office