Liquid medicine injection device

• US 10,549,030 B2
• Filed: 08/01/2017
• Issued: 02/04/2020
• Est. Priority Date: 09/08/2016
• Status: Active Grant

• Current Assignee: EOFlow Co. Ltd.
• Original Assignee: EOFlow Co. Ltd.
• Inventors: Kim, Seung Ha, Kim, Jae Hong, Kim, Jesse Jaejin, Song, Yongchul, Jeong, Jongook
• Primary Examiner(s): Price, Nathan R
• Assistant Examiner(s): Igel, Mark Alan
• Application Number:
  US16/326,756
• Publication Number:
  US 20190192765A1
• Time in Patent Office: 917 Days
• Field of Search: 6048911
• CPC Class Codes: A61M 2005/14252 with needle insertion means
• CPC Class Codes: A61M 2005/14256 with means for preventing access to the needle after use
• CPC Class Codes: A61M 2039/2493 Check valve with complex design, e.g. several inlets and outlets and several check valves in one body
• CPC Class Codes: A61M 2205/3327 Measuring
• CPC Class Codes: A61M 2205/3331 Pressure; Flow
• CPC Class Codes: A61M 2205/3379 Masses, volumes, levels of fluids in reservoirs, flow rates
• CPC Class Codes: A61M 2205/3592 using telemetric means, e.g. radio or optical transmission
• CPC Class Codes: A61M 2205/50 with microprocessors or computers
• CPC Class Codes: A61M 2205/82 Internal energy supply devices
• CPC Class Codes: A61M 2230/201 Glucose concentration
• CPC Class Codes: A61M 31/00 Devices for introducing or retaining media, e.g. remedies, in cavities of the body A61M25/00 takes precedence ; introducing or retaining ophthalmic products into the ocular cavities A61F9/0008
• CPC Class Codes: A61M 39/24 Check- or non-return valves
• CPC Class Codes: A61M 5/142 Pressure infusion, e.g. using pumps
• CPC Class Codes: A61M 5/14244 adapted to be carried by the patient, e.g. portable on the body
• CPC Class Codes: A61M 5/14248 of the skin patch type
• CPC Class Codes: A61M 5/145 using pressurised reservoirs, e.g. pressurised by means of pistons
• CPC Class Codes: A61M 5/14593 the diaphragm being actuated by fluid pressure
• CPC Class Codes: A61M 5/168 Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body flow control in general G05D7/00
• CPC Class Codes: A61M 5/1684 by detecting the amount of infusate remaining, e.g. signalling end of infusion
• CPC Class Codes: A61M 5/1723 using feedback of body parameters, e.g. blood-sugar, pressure measurement of body parameters A61B5/00
• CPC Class Codes: A61M 5/3202 : Devices for protection of the needle before use, e.g. caps A61M5/50 takes precedence; for infusion spikes A61M5/1626; protectors for sharps A61B50/3001
• CPC Class Codes: F04B 43/043 : Micropumps

Abstract

The present invention discloses a liquid medicine injection device that is attached to a patient'"'"'s body to inject liquid medicine such as insulin at an appropriate time.

A liquid medicine injection device according to the present invention includes: a case; a liquid medicine tank that is disposed in the case and where liquid medicine is received; an electro-osmosis pump that is connected with the liquid medicine tank and moves the liquid medicine; a needle assembly that receives the liquid medicine by being connected to the electro-osmosis pump and injects the received liquid medicine into a human body; and an adhesive member combined to the case and attached to the human body.

Claims

1. A liquid medicine injection device comprising:

a case;

a liquid medicine tank that is disposed in the case and where liquid medicine is received;

an electro-osmosis pump that is connected with the liquid medicine tank and moves the liquid medicine;

a needle assembly that receives the liquid medicine by being connected to the electro-osmosis pump and injects the received liquid medicine into a human body; and

an adhesive member combined to the case and for attaching to a human body,

wherein the needle assembly comprises;

a knob;

a rotation member that rotates with rotation of the knob and provided with a locking protrusion portion in an internal wall thereof;

a moving member that is accommodated in the rotation member and moves in an axial direction or is fixed at a predetermined position by movement of the locking protrusion portion;

a needle combined to the moving member; and

a spring that is elastically supported between the rotation member and the moving member, and

the moving member comprises;

a first locking groove portion that is supported by the locking groove portion;

a straight line guide groove portion that is connected with the first locking groove portion and provided along an axial direction to guide the locking protrusion portion;

a slope guide groove portion that is connected with the straight line guide groove portion and provided along a slope direction to guide the locking protrusion portion; and

a second locking groove portion that is connected with the slope guide groove portion and supported by the locking groove portion.

2. The liquid medicine injection device of claim 1, wherein the electro-osmosis pump comprises:

a connector provided with a liquid medicine inlet and a liquid medicine outlet;

a check valve assembly combined to one side of the connector; and

a driver that is connected to the other side of the connector and moves the liquid medicine toward the liquid medicine outlet by applying pressure to the liquid medicine while being separated from the liquid medicine, which passes through the check valve assembly.

3. The liquid medicine injection device of claim 2, wherein the check valve assembly comprises:

an inflow check valve that is disposed in the liquid medicine inlet to move the liquid medicine in one direction; and

an discharge check valve that is disposed in the liquid medicine outlet to discharge the liquid medicine delivered through the inflow check valve.

4. The liquid medicine injection device of claim 2, wherein the driver comprises:

a first diaphragm that is combined to the connector and blocks liquid medicine of the check valve assembly;

a first pump housing that is combined to the first diaphragm and provided with a first space where an operation fluid is received;

a first power supply line that is combined to the first pump housing and receives power;

a first electrode connected to the first power supply line;

a membrane of which one side is combined to the first electrode;

a second electrode combined to the other side of the membrane;

a second power supply line that supplies power to the second electrode;

a second pump housing combined to one side of the second electrode and provided with a second space where the operation fluid is received; and

a second diaphragm combined to the second pump housing.

5. The liquid medicine injection device of claim 1, wherein the liquid medicine injection device comprises a liquid medicine remaining amount checking portion, and

the liquid medicine remaining amount checking portion comprises:

a first electrode plate received in the liquid medicine tank;

a second electrode plate that is received in the liquid medicine tank and disposed at distance from the first electrode plate; and

a detection sensor that senses capacitance that varies according to a remaining amount of the liquid medicine between the first electrode plate and the second electrode plate and transmits a sensed signal to a controller.

6. The liquid medicine injection device of claim 1, wherein the liquid medicine injection device comprises an operation switch, and

the operation switch comprises:

a magnet provided in the piston that is accommodated in the liquid medicine tank; and

a magnet detection sensor that senses movement of the magnet and transmits a sensed result to a controller,

wherein the controller receives the signal from the magnet detection sensor and supplies power to control the liquid medicine injection device to be in an operable state.