Patent ID: 11864796
Assignee: OHDAE CORPORATION
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 8:
9. The needle channel bundle of claim 8,
wherein the channel rotation unit comprises a cylindrical elevation gear holder surrounding the needle channel bundle in contact with an outer circumference of a portion of the body of the needle channel that is under the locking protrusion, and a cylindrical ratchet support holder surrounding the needle channel bundle in contact with an outer surface of the elevation gear holder,
wherein the saw-toothed ratchet gear tooth is provided in plurality as saw-toothed ratchet gear teeth,
wherein a same number of wedge-type protrusions as the number of the ratchet gear teeth provided on the needle channel bundle are continuously formed on an upper surface of the elevation gear holder,
wherein saw-toothed ratchet gear recesses are formed on an upper surface of the ratchet support holder and each of the saw-toothed ratchet gear recesses has an inclination angle to be engaged with a corresponding ratchet gear tooth of the ratchet gear teeth, and
wherein an uppermost end of each wedge-type protrusion is positioned between uppermost ends of a corresponding saw-toothed ratchet gear recess of the saw-toothed ratchet gear recesses.