US 11,376,374 B2 · Medicine injecting tip, hand piece, and skin treating device

Abstract

Provided are a medicine injecting tip, which injects a medicine into a hole in a skin formed by a needle while invading the needle to a preset depth of a deep portion of the skin, a hand piece equipped with the medicine injecting tip, and a skin treatment device using the medicine injecting tip. The medicine injecting tip includes a cylinder, a plunger that reciprocates downward and upward, and has a first space and a second space formed inside the cylinder, and a needle disposed in the plunger and disposed in the second space of the cylinder. The needle is inserted into a skin and a negative pressure state is formed in the second space when the plunger moves downward, and the needle is discharged from the skin and a positive pressure state is formed in the second space, when the plunger moves upward.

Claims18

Dependent claims

A medicine injecting tip comprising:

a cylinder;
a plunger configured to reciprocate downward and upward;
a first space formed between a top wall of the cylinder and a top surface of the plunger;
a second space formed in a bottom portion of the cylinder;
a first channel that connects the first space and the second space;
and
a needle attached to a bottom surface of the plunger and configured to be positioned in the second space,
wherein the needle is configured to be inserted into skin when the plunger moves downward,
wherein the needle is configured to be discharged from the skin and a positive pressure state is formed in the second space, when the plunger moves upward, and
wherein the first channel is configured to transfer gas between the first space and the second space, in response to a reciprocal movement of the plunger.

7 more elements

Dependencies are inferred from the claim text.

Medicine injecting tip, hand piece, and skin treating device

Life of this patent

Medicine injecting tip, hand piece, and skin treating device

Life of this patent

Abstract

Claims18