Patent ID: 11911598
Assignee: JMBIOTECH CO., LTD.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 0:
1. A device for injecting a fixed quantity of liquid medicine, the device comprising:
an upper housing through which a first cavity is vertically formed;
a lower housing configured to be connectable to a lower portion of the upper housing, with a second cavity being vertically formed through the lower housing;
a cap disposed in an upper portion of the first cavity, and configured such that at least a portion thereof linearly reciprocates in the first cavity; and
a fixed-quantity moving module moved downwards by a preset distance for each vertical reciprocating movement of the cap to push a piston of a syringe,
wherein the fixed-quantity moving module comprises:
a first pushing block configured to receive a force from a lower end of the cap and thereby move downwards;
a second pushing block with a hollow portion provided in the first cavity under the first pushing block to be spaced apart therefrom by a predetermined distance; and
a pushing bar extending to a predetermined length to be inserted into the upper housing,
wherein the first pushing block and the second pushing block comprise a hollow portion formed vertically in which the pushing bar is inserted,
wherein the pushing bar comprises at least one linear ratchet gear that is longitudinally formed on a side surface of the pushing bar,
wherein the first pushing block comprises at least one first pawl, and the second pushing block comprises at least one second pawl,
wherein the at least one first pawl and the at least one second pawl are configured to allow the pushing bar to move only in a downward direction, and
wherein the piston moves by only linear movement of the pushing bar that is implemented by the first and second pawls engaging with the at least one linear ratchet gear.