Unilateral driving mechanism for a portable infusion system
A unilateral driving mechanism for a portable infusion system is provided. The unilateral driving mechanism comprises an actuator ( 1 ), a swinging part ( 2 ), gears ( 4 ), blockers ( 5 ), a compression spring ( 6 ), a rod ( 7 ), a reservoir ( 8 ), a plunger ( 9 ) and a control circuit. One end of the rod ( 7 ) is connected with the gears ( 4 ), the other end of the rod ( 7 ) is connected with the plunger ( 9 ), and one lower limb of the swinging part ( 2 ) is connected with the spring ( 6 ). The unilateral driving mechanism for a portable infusion system has advantages of compact structure, small volume, low power consumption, low cost, high precision and convenience in use.
1. A unilateral driving mechanism for a portable infusion system, comprising
an actuator ( 1 ), a swinging part ( 2 ), gears ( 4 ), blockers ( 5 ), a tension spring ( 6 ), a rod ( 7 ), a reservoir ( 8 ), and a plunger ( 9 );
wherein the swinging part comprises a first lower limb ( 210 ), a second lower limb ( 220 ), a head ( 250 ), a first upper limb ( 230 ), and a second upper limb ( 240 ), wherein the tension spring ( 6 ) comprises an initial state and a stretched state, wherein
the rod ( 7 ) comprises a first end and a second end, the first end of the rod ( 7 ) is connected with the gears ( 4 ), the second end of the rod ( 7 ) is connected with the plunger ( 9 ), and the first lower limb ( 210 ) of the swinging part ( 2 ) is connected with the tension spring ( 6 );
the actuator ( 1 ) is configured such that
prior to application of a unilateral drive on the actuator ( 1 ), the tension spring ( 6 ) is in the initial state, and the second lower limb ( 220 ) of the swinging part ( 2 ), which is not connected with the tension spring ( 6 ) is separated from the blocker ( 5 );
upon application of the unilateral drive on the actuator ( 1 ), the head ( 250 ) of the swinging part ( 2 ) is driven and drives the swinging part ( 2 ) swinging forward once around a central axis of the swinging part, and the first upper limb ( 230 ) of the swinging part ( 2 ) rotates one of said gears ( 4 ) to push the plunger ( 9 ) in the reservoir ( 8 ) to administrate a fluid in the reservoir ( 8 ) to a patient by one unit dose; at the same time, the second lower limb ( 220 ) of the swinging part ( 2 ) which is not connected with the tension spring ( 6 ) contacts one of said blockers ( 5 ), and the tension spring ( 6 ) is in the stretched state;
upon withdrawal of the unilateral drive on the actuator ( 1 ), the tension spring ( 6 ) is released, a tension from releasing the tension spring ( 6 ) drives the swinging part ( 2 ) swinging backward once around the central axis of the swinging part, and the second upper limb ( 240 ) of the swinging part ( 2 ) rotates a second of said gears ( 4 ) to push the plunger ( 9 ) in the reservoir ( 8 ) to administrate the fluid in the reservoir ( 8 ) to the patient by one unit dose; at the same time, the second lower limb ( 220 ) of the swinging part ( 2 ) which is not connected with the tension spring ( 6 ) is separated from one of said blockers ( 5 );
wherein a single application of the unilateral drive on the actuator ( 1 ) makes the swinging part ( 2 ) swing once forward and once backward, which leads to an administration of two unit doses of the fluid from the reservoir to the patient by the infusion system; applying the unilateral drive on the actuator ( 1 ) at regular intervals makes the infusion system realize continuous administration.
2. A unilateral driving mechanism for a portable infusion system, comprising
an actuator ( 1 ), a swinging part ( 2 ), gears ( 4 ), blockers ( 5 ), a compression spring ( 6 ), a rod ( 7 ), a reservoir ( 8 ), and a plunger ( 9 );
wherein the swinging part comprises a first lower limb ( 210 ), a second lower limb ( 220 ), a head ( 250 ), a first upper limb ( 230 ), and a second upper limb ( 240 ), wherein the compression spring ( 6 ) comprises an initial state and a compressed state, wherein
the rod ( 7 ) comprises a first end and a second end, the first end of the rod ( 7 ) is connected with the gears ( 4 ), the second end of the rod ( 7 ) is connected with the plunger ( 9 ), and the first lower limb ( 210 ) of the swinging part ( 2 ) is connected with the compression spring ( 6 );
the actuator ( 1 ) is configured such that
prior to application of a unilateral drive on the actuator ( 1 ), the compression spring ( 6 ) is in the initial state, and the second lower limb ( 220 ) of the swinging part ( 2 ), which is not connected with the compression spring ( 6 ) contacts the blocker ( 5 );
upon application of the unilateral drive on the actuator ( 1 ), the head ( 250 ) of the swinging part ( 2 ) is driven and drives the swinging part ( 2 ) swinging forward once around a central axis of the swinging part, and the first upper limb ( 230 ) of the swinging part ( 2 ) rotates one of said gears ( 4 ) to push the plunger ( 9 ) in the reservoir ( 8 ) to administrate a fluid in the reservoir ( 8 ) to a patient by one unit dose; at the same time, the second lower limb ( 220 ) of the swinging part ( 2 ) which is not connected with the compression spring ( 6 ) is separated from one of said blockers ( 5 ), and the compression spring ( 6 ) is in the compressed state;
upon withdrawal of the unilateral drive on the actuator ( 1 ), the compression spring ( 6 ) is released, a tension from releasing the compression spring ( 6 ) drives the swinging part ( 2 ) swinging backward once around the central axis of the swinging part, and the second upper limb ( 240 ) of the swinging part ( 2 ) rotates a second of said gears ( 4 ) to push the plunger ( 9 ) in the reservoir ( 8 ) to administrate the fluid in the reservoir ( 8 ) to the patient by one unit dose; at the same time, the second lower limb ( 220 ) of the swinging part ( 2 ) which is not connected with the compression spring ( 6 ) contacts one of said blockers ( 5 ) again;
wherein a single application of the unilateral drive on the actuator ( 1 ) makes the swinging part ( 2 ) swing once forward and once backward, which leads to an administration of two unit doses of the fluid from the reservoir to the patient by the infusion system; applying the unilateral drive on the actuator ( 1 ) at regular intervals makes the infusion system realize continuous administration.
3. A unilateral driving mechanism for a portable infusion system, comprising
an actuator ( 1 ), a swinging part ( 2 ), gears ( 4 ), blockers ( 5 ), a torsion spring ( 6 ), a rod ( 7 ), a reservoir ( 8 ), and a plunger ( 9 );
wherein the swinging part comprises a first lower limb ( 210 ), a second lower limb ( 220 ), a head ( 250 ), a first upper limb ( 230 ), and a second upper limb ( 240 ), wherein the torsion spring ( 6 ) comprises an initial state and a twisted state, wherein
the rod ( 7 ) comprises a first end and a second end, the first end of the rod ( 7 ) is connected with the gears ( 4 ), the second end of the rod ( 7 ) is connected with the plunger ( 9 ), and the first lower limb ( 210 ) of the swinging part ( 2 ) is connected with the torsion spring ( 6 );
the actuator ( 1 ) is configured such that
prior to application of a unilateral drive on the actuator ( 1 ), the torsion spring ( 6 ) is in the initial state, and the second lower limb ( 220 ) of the swinging part ( 2 ), which is not connected with the torsion spring ( 6 ) contacts the blocker ( 5 );upon application of the unilateral drive on the actuator ( 1 ), the head ( 250 ) of the swinging part ( 2 ) is driven and drives the swinging part ( 2 ) swinging forward once around a central axis of the swinging part, and the first upper limb ( 230 ) of the swinging part ( 2 ) rotates one of said gears ( 4 ) to push the plunger ( 9 ) in the reservoir ( 8 ) to administrate a fluid in the reservoir ( 8 ) to a patient by one unit dose; at the same time, the second lower limb ( 220 ) of the swinging part ( 2 ) which is not connected with the torsion spring ( 6 ) is separated from one of said blockers ( 5 ), and the torsion spring ( 6 ) is in the twisted state;
upon withdrawal of the unilateral drive on the actuator ( 1 ), the torsion spring ( 6 ) is released, a torque from releasing the torsion spring ( 6 ) drives the swinging part ( 2 ) swinging backward once around the central axis of the swinging part, and the second upper limb ( 240 ) of the swinging part ( 2 ) rotates a second of said gears ( 4 ) to push the plunger ( 9 ) in the reservoir ( 8 ) to administrate the fluid in the reservoir ( 8 ) to the patient by one unit dose; at the same time, the second lower limb ( 220 ) of the swinging part ( 2 ) which is not connected with the torsion spring ( 6 ) contacts one of said blocker ( 5 ) again;
wherein a single application of the unilateral drive on the actuator ( 1 ) makes the swinging part ( 2 ) swing once forward and once backward, which leads to an administration of two unit doses of the fluid from the reservoir to the patient by the infusion system; applying the unilateral drive on the actuator ( 1 ) at regular intervals makes the infusion system realize continuous administration.
4. A unilateral driving mechanism for a portable infusion system according to claim 1 , wherein,
a monitoring element ( 3 ) configured to monitor the movement of the swinging part ( 2 ) and a control circuit ( 510 ) are further set on the blocker ( 5 );
each time the swinging part ( 2 ) contacts the blocker ( 5 ), the monitoring element ( 3 ) recognizes the movement of the swinging part ( 2 ) and sends a signal to a control unit of the portable infusion system via the control circuit ( 510 ) to monitor the administration of the system.
5. A unilateral driving mechanism for a portable infusion system according to claim 4 , wherein,
the monitoring element ( 3 ) is a metallic element or an optical element.
6. A unilateral driving mechanism for a portable infusion system according to claim 1 , wherein,
each time a unilateral drive is applied on the actuator ( 1 ), one of said two unit doses administered by the portable infusion system is 0.05-5ul.
7. A unilateral driving mechanism for a portable infusion system according to claim 1 ,
further comprising a wire ( 10 ), by which the actuator ( 1 ) is connected with the head ( 250 ) of the swinging part ( 2 ).
8. A unilateral driving mechanism for a portable infusion system according to claim 1 , wherein,
the actuator ( 1 ) is a piezoelectric actuator or a magnet actuator or a gas actuator or a chemical actuator or a shape memory alloy or a wax actuator.
9. A unilateral driving mechanism for a portable infusion system according to claim 2 , wherein,
a monitoring element ( 3 ) configured to monitor a movement of the swinging part ( 2 ) and a control circuit ( 510 ) are further set on the blocker ( 5 );
each time the swinging part ( 2 ) contacts the blocker ( 5 ), the monitoring element ( 3 ) recognizes the movement of the swinging part ( 2 ) and sends a signal to a control unit of the portable infusion system via the control circuit ( 510 ) to monitor the administration of the system.
10. A unilateral driving mechanism for a portable infusion system according to claim 3 , wherein,
a monitoring element ( 3 ) configured to monitor a movement of the swinging part ( 2 ) and a control circuit ( 510 ) are further set on the blocker ( 5 );
each time the swinging part ( 2 ) contacts the blocker ( 5 ), the monitoring element ( 3 ) recognizes the movement of the swinging part ( 2 ) and sends a signal to a control unit of the portable infusion system via the control circuit ( 510 ) to monitor the administration of the system.
11. A unilateral driving mechanism for a portable infusion system according to claim 2 , wherein,
each time the unilateral drive is applied on the actuator ( 1 ), one of said two unit doses administered by the portable infusion system is 0.05-5ul.
12. A unilateral driving mechanism for a portable infusion system according to claim 3 , wherein,
each time the unilateral drive is applied on the actuator ( 1 ), one of said two unit doses administered by the portable infusion system is 0.05-5ul.
13. A unilateral driving mechanism for a portable infusion system according to claim 2 ,
further comprising a wire ( 10 ), by which the actuator ( 1 ) is connected with the head ( 250 ) of the swinging part ( 2 ).
14. A unilateral driving mechanism for a portable infusion system according to claim 3 ,
further comprising a wire ( 10 ), by which the actuator ( 1 ) is connected with the head ( 250 ) of the swinging part ( 2 ).
15. A unilateral driving mechanism for a portable infusion system according to claim 2 , wherein,
the actuator ( 1 ) is a piezoelectric actuator or a magnet actuator or a gas actuator or a chemical actuator or a shape memory alloy or a wax actuator.
16. A unilateral driving mechanism for a portable infusion system according to claim 3 , wherein,
the actuator ( 1 ) is a piezoelectric actuator or a magnet actuator or a gas actuator or a chemical actuator or a shape memory alloy or a wax actuator.