초록 ▼

In an apparatus for automatically filling a pipette according to the present invention, only a predetermined air is supplied to a pipette assembly to which a substance is discharged, even if an excessive operation force is applied by a user, so it is possible to prevent a waste of the substance bein

In an apparatus for automatically filling a pipette according to the present invention, only a predetermined air is supplied to a pipette assembly to which a substance is discharged, even if an excessive operation force is applied by a user, so it is possible to prevent a waste of the substance being unnecessarily discharged.

대표청구항 ▼

1. An apparatus constructed to automatically fill a pipette (22) with a substance from a container (10), the apparatus comprising: a pipette assembly (20) constructed to suck the substance from the container (10) thus filling the pipette (22) with the substance;a pumping assembly (30) that is dispos

1. An apparatus constructed to automatically fill a pipette (22) with a substance from a container (10), the apparatus comprising: a pipette assembly (20) constructed to suck the substance from the container (10) thus filling the pipette (22) with the substance;a pumping assembly (30) that is disposed over the pipette assembly (20), relatively moves to the pipette assembly (20), and provides a pressure change from a pumping space (81) to the pipette assembly (20);a bellows that is made of an elastic material and connects the pipette assembly (20) and the pumping assembly (30) that are relatively moveable to each other; anda housing (50) which includes a thread (51) on an inner side of the housing (50) that is couplable to a thread (11) of the container (10), wherein the pumping assembly (30) is fixed to the housing (50), and wherein the pumping assembly (30) comprises: a discharge hole (65) that connects the pumping space (81) and the pipette assembly (20);an intake hole (67) connected with the pumping space (81) such that external air flows into the pumping space (81);a pumping mount (60) that is fixed to the housing (50), to which the bellows is coupled, and that has the discharge hole (65) and the intake hole (67);a discharge diaphragm (175) constructed to seal the discharge hole (65) and open the sealed discharge hole (65) by pressure difference when positive pressure is generated in the pumping space (81);an intake diaphragm (188) constructed to seal the intake hole (67) and open the sealed intake hole (67) by pressure difference when negative pressure is generated in the pumping space (81);a pump (180) that has the pumping space (81) therein and has an intake diaphragm (188), disposed between the pumping mount (60) and the housing (50), constructed to close the intake hole (67) by pressure difference only when negative pressure is generated in the pumping space (81); anda check valve member (170), disposed in the pumping mount (60), constructed to close the discharge hole (65) and open the discharge hole only when positive pressure is generated in the pumping space (81) such that air in the pumping space (81) flows to the bellows. 2. The apparatus of claim 1, wherein the discharge hole (65) allows discharged air to flow to the pipette assembly (20) andwherein the intake hole (67) allows external air to flow into the pumping space (81). 3. The apparatus of claim 1, wherein the pumping mount (60) comprises: a pumping body (62) coupled and fixed to the housing (50);a pumping mount fixing portion (66) where the bellows is coupled and fixed; anda pump mount support (68) constructed to separate the discharge hole (65) and the intake hole (67) and is in contact with the pump (180) in the pumping assembly (30),wherein the pumping body (62) comprises: a coupling hole (63) through which the check valve member (170) is disposed;the discharge hole (65) that is closed by the check valve member (170) and is opened towards the bellows only when positive pressure is generated in the pumping space (81); andthe intake hole (67) that is closed by the pump (180) and is opened towards the inside of the pumping space (81) only when negative pressure is generated in the pumping space (81). 4. The apparatus of claim 3, wherein the housing (50) is configured to be thread-fastened to the container (10) to allow the bellows to contract by relatively moving toward the pipette assembly (20) and the pumping assembly (30), and wherein the housing is configured to be separated from the container (10) to allow the bellows to expand by relatively moving away from the pipette assembly (20) and the pumping assembly (30). 5. The apparatus of claim 2, wherein the housing (50) is configured to be thread-fastened to the container (10) to allow the bellows to contract by relatively moving toward the pipette assembly (20) and the pumping assembly (30), and wherein the housing is configured to be separated from the container (10) to allow the bellows to expand by relatively moving away from the pipette assembly (20) and the pumping assembly (30). 6. The apparatus of claim 1, wherein the housing (50) is configured to be thread-fastened to the container (10) to allow the bellows to contract by relatively moving toward the pipette assembly (20) and the pumping assembly (30), and wherein the housing is configured to be separated from the container (10) to allow the bellows to expand by relatively moving away from the pipette assembly (20) and the pumping assembly (30). 7. An apparatus constructed to automatically fill a pipette (22) with a substance from a container (10), the apparatus comprising: a pipette assembly (20) to suck the substance from the container (10) thus filling the pipette (22) with the substance;a pumping assembly (30) that is disposed over the pipette assembly (20), relatively moves to the pipette assembly (20), and provides a pressure change from a pumping space (81) to the pipette assembly (20);a bellows that is made of an elastic material and connects the pipette assembly (20) and the pumping assembly (30) that are relatively moveable to each other; anda housing (50) which includes a thread (51) on an inner side of the housing (50) that is couplable to a thread (11) of the container (10), wherein the pumping assembly (30) is fixed to the housing (50), and wherein the pumping assembly (30) comprises: a pumping mount (60) that is coupled and fixed to the housing (50) in contact with the bellow (40);a discharge hole (65) constructed to connect the pumping space (81) and the pipette assembly (20);an intake hole (67) connected with the pumping space (81) such that external air flows into the pumping space (81);a discharge check valve (70), disposed in the pumping mount (60), opens or closes the discharge hole (65) in accordance with a pressure difference of the pumping assembly (30);an intake check valve (90), disposed in the pumping mount (60), opens or closes the intake hole (67) in accordance with a pressure difference of the pumping assembly (30); anda pump (80) made of an elastic flexible material, keeps air in the pumping space (81) formed therein, is disposed between the pumping mount (60) and the housing (50), and provides compressed air to the bellows through the pumping mount (60),wherein the pump (80) includes an intake diaphragm (94), disposed between the pumping mount (60) and the housing (50), constructed to close the intake hole (67) and opening the intake hole (67) by pressure difference only when negative pressure is generated in the pumping space (81), andwherein the discharge check valve (70) is disposed in the pumping mount (60) to close the discharge hole (65) and open the discharge hole (65) only when positive pressure is generated in the pumping space (81) such that air in the pumping space (81) flow to the bellows. 8. The apparatus of claim 7, wherein the pumping mount (60) comprises: a pumping body (62) that is disposed between the housing (50) and the pump (80);a pumping mount fixing portion (66) where the bellows is coupled and fixed; anda pump mount support (68) constructed to separate the discharge hole (65) and the intake hole (67) and is in contact with the pump (80) in the pumping assembly (30),wherein the pumping body (62) comprises: the discharge hole (65) that is closed by the discharge check valve (70) and is opened towards the bellows only when positive pressure is generated in the pump (80) by the pressing the pump (80); andthe intake hole (67) that is closed by the intake check valve (90) and is opened towards the inside of the pump (80) only when negative pressure is generated in the pump (80). 9. The apparatus of claim 8, wherein the housing (50) is configured to be thread-fastened to the container (10) to allow the bellows to contract by relatively moving toward the pipette assembly (20) and the pumping assembly (30), and wherein the housing is configured to be separated from the container (10) to allow the bellows to expand by relatively moving away from the pipette assembly (20) and the pumping assembly (30). 10. The apparatus of claim 7, wherein the bellows is constructed to expand to allow the substance of the container (10) to be sucked into the pipette assembly (20). 11. The apparatus of claim 7, wherein the housing (50) is configured to be thread-fastened to the container (10) to allow the bellows to contract by relatively moving toward the pipette assembly (20) and the pumping assembly (30), and wherein the housing is configured to be separated from the container (10) to allow the bellows to expand by relatively moving away from the pipette assembly (20) and the pumping assembly (30). 12. The apparatus of claim 7, wherein the discharge hole (65) allows discharged air to flow to the pipette assembly (20), wherein the intake hole (67) allows external air to flow to the pumping space (81) of the pumping assembly (30),wherein the discharge check valve (70) is constructed to allow air to flow to the pipette assembly (20) through the pumping mount (60) when the pressure inside the pump (80) is positive pressure, and constructed to prevent air flowing to the pump (80) from the pipette assembly (20) when the pressure inside the pump (80) is negative pressure, andwherein the intake check valve (90) is constructed to allow external air to flow into the pump (80) through the pumping mount (60) when the pressure inside the pump (80) is negative pressure, and constructed to prevent air in the pump (80) from being discharged when the pressure inside the pump (80) is positive pressure. 13. The apparatus of claim 12, wherein the bellows is constructed to expand to allow the substance of the container (10) to be sucked into the pipetter assembly (20). 14. The apparatus of claim 12, wherein the housing (50) is configured to be thread-fastened to the container (10) to allow the bellows to contract by relatively moving toward the pipette assembly (20) and the pumping assembly (30), and wherein the housing is configured to be separated from the container (10) to allow the bellows to expand by relatively moving away from the pipette assembly (20) and the pumping assembly (30).