Patent ID: 11897264
Assignee: NTN CORPORATION
Field: Surface technology, coating (Chemistry)
Classification: CPC B | IPC B

Claim 0:
1. A liquid application unit for applying a liquid material to a surface of a target using an application needle, the liquid application unit comprising:
the application needle; and
a liquid material container that stores the liquid material, wherein
the liquid material container has a space that stores the liquid material and a hole that allows the application needle to pass through the space,
a wetting and spreading suppressing structure for the liquid material is disposed at a periphery of the hole in the liquid material container,
the application needle includes a tip end that applies the liquid material to the target and a holding portion disposed closer to a base side than the tip end,
the wetting and spreading suppressing structure is a protruding portion in which the liquid material container has a protruding shape toward a tip end side of the application needle,
in a cross section along the hole, the protruding portion includes a first shape portion and a second shape portion, the first shape portion having a shape in which a protruding portion surface that is a surface of the protruding portion is inclined such that a width of the hole is larger on the tip end side than on the holding portion side, the second shape portion having a shape in which the protruding portion surface is inclined outside of the hole such that a width of the protruding portion increases from the tip end side toward the holding portion side, and
the inclined protruding portion surface in the second shape portion has a steeper slope than the inclined protruding portion surface in the first shape portion with respect to an extending direction of the hole.