Injection needle
AssigneeKao Corporation
InventorsWataru Hariu, Takatoshi Niitsu, Tomoya Nishimura
Life of this patent
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Abstract
An injection needle includes: protrusions that protrude from a sheet base. The protrusions include a first protrusion having an opening at a tip end portion and being hollow, a second protrusion having no opening at a tip end portion; and an insertion depth controller provided at an intermediate position lower than a tip end position of the first protrusion and higher than a surface of the sheet base. A difference in height between the tip end position of the first protrusion and a position of the insertion depth controller is preferably 1 μm or more and 5 000 μm or less.
Claims20
An injection needle including:
- protrusions, that protrude from a sheet base, the protrusions including:
- a first protrusion having an opening at a tip end portion thereof and being hollow, and
- a second protrusion having no opening at a tip end portion thereof;
- and
- an insertion depth controller to control an insertion depth of the first protrusion, the insertion depth controller being at an intermediate position lower than a tip end position of the first protrusion and higher than a surface of the sheet base,
- wherein the insertion depth controller is at a position lower than a tip end position of the second protrusion.
An injection needle arrangement comprising:
- a plurality of protrusions, that protrude from a first side of a sheet base, the plurality of protrusions including:
- a first protrusion having an opening at a tip end portion thereof and being hollow,
- a second protrusion having no opening at a tip end portion thereof;
- and
- an insertion depth controller in the form of one or more third protrusions to control an insertion depth of the first protrusion,
- wherein each of the one or more third protrusions has a tip end at a position lower than a tip end position of the first protrusion and a tip end position of the second protrusion and higher than a surface of the sheet base.
Dependencies are inferred from the claim text.