CN216798228U

CN216798228U - Drug delivery transmission system and cartridge type drug bottle

Info

Publication number: CN216798228U
Application number: CN202122648954.1U
Authority: CN
Inventors: 郑攀; 道尔马克; 宋哲; 陈宁宁
Original assignee: Weitai Medical Device Hangzhou Co ltd
Current assignee: Weitai Medical Device Hangzhou Co ltd
Priority date: 2021-11-01
Filing date: 2021-11-01
Publication date: 2022-06-24
Anticipated expiration: 2031-11-01

Abstract

The utility model relates to the technical field of medical supplies, in particular to a drug delivery transmission system and a card type medicine bottle. The drug delivery drive system comprises: motor, diversion subassembly, curve transmission subassembly and butt piece, wherein: the motor is used for outputting rotary motion so as to provide driving force for the power input end of the direction changing component; the curve transmission assembly comprises a guide piece and a toothed chain, the first tail end of the toothed chain is used for pushing the abutting part to do linear motion, the second tail end of the toothed chain can do curve motion, the toothed chain is a plurality of racks which are connected in sequence, and the guide piece is used for guiding the racks in curve motion; the power output end of the direction changing component is meshed with the rack; the abutment is connected to the dosing piston. The utility model adopts the rack chain as the transmission component, can efficiently transmit, and the transmission tail end can do curvilinear motion, thereby improving the space utilization rate, reducing the volume of the whole system, and having the advantages of high transmission efficiency, good concealment, light weight, convenient use and the like.

Description

Drug delivery transmission system and cartridge type drug bottle

Technical Field

The utility model relates to the technical field of medical supplies, in particular to a drug delivery transmission system and a card type medicine bottle.

Background

The insulin pump has the basic function of simulating the secretion function of pancreas and pushes insulin to the subcutaneous part of a user according to the dosage required by the human body so as to keep the blood sugar stable all day long and achieve the purpose of controlling diabetes.

In the prior art, a drug delivery transmission system is driven by a motor, is decelerated by a multi-stage gear, and then adopts axial movement of a tail end screw rod as movement output. The drug delivery transmission system in the prior art requires that the transmission tail end is in integral linear transmission, the volume of the integral system is limited by the tail end of the transmission system, miniaturization of products is difficult to realize, and product concealment and user use experience are influenced.

In addition, in the prior art, a medicine storage device is usually specially arranged, so that the medicine liquid is firstly extracted from a medicine liquid container into the medicine storage device and then the medicine liquid can be matched with a micro-infusion pump for use, and more parts and more operation steps are required. The prior art has the disadvantages of multiple operation steps, poor use experience, and waste and loss of a certain dosage.

SUMMERY OF THE UTILITY MODEL

In view of this, the main object of the present invention is to provide a drug delivery transmission system and a card type drug bottle, which are helpful to achieve miniaturization and convenient operation of products and improve user experience.

To achieve the above object, one aspect of the present invention provides a drug delivery actuator system comprising: motor, diversion subassembly, curve transmission subassembly and butt piece, wherein: the motor is used for outputting rotary motion so as to provide driving force for the power input end of the direction changing assembly; the curve transmission assembly comprises a guide piece and a toothed chain, wherein the first tail end of the toothed chain is used for pushing the abutting part to do linear motion, the second tail end of the toothed chain can do curve motion, the toothed chain is a plurality of racks which are connected in sequence, and the guide piece is used for guiding the racks in curve motion; the power output end of the direction changing assembly is meshed with the rack; the abutment is connected with the dosing piston.

Optionally, the method further comprises: and the reduction gear set is positioned between the motor and the direction changing assembly.

Alternatively, the primary gear of the reduction gear set meshes with a motor gear fixed to the motor output shaft, transmitting the rotational motion to the final gear of the reduction gear set.

Optionally, the direction changing assembly includes a worm and a worm wheel which are engaged with each other perpendicularly, the worm is fixed to a gear rotating shaft of the reduction gear set, and the worm wheel outputs a rotational motion perpendicular to an input motion direction.

Optionally, the curvilinear motion guide comprises guide posts or guide surfaces arranged along a curve.

Optionally, two adjacent racks are connected through a revolute pair.

Optionally, the administration piston is a piston inside a cartridge vial.

Optionally, the gear train starting and stopping device further comprises a transmission stroke metering unit and a control unit, wherein the transmission stroke metering unit is used for monitoring the stroke of the gear train, and the control unit controls the starting and stopping of the motor according to the stroke.

Another aspect of the present invention provides a card vial including a dosing piston located therein that is mateable with the abutment in the dosing drive system of the present invention.

Optionally, the stopper of the card type medicine bottle is communicated with a needle tube or an infusion pipeline, and the medicine liquid is controllably metered and infused into the body of a user in one unit or a plurality of units through the needle tube or the infusion pipeline.

According to the technical scheme of the utility model, the rack chain is adopted as the transmission assembly, the gear transmission can be more efficiently transmitted compared with other thread transmission schemes, and the transmission tail end can do curvilinear motion, so that the space utilization rate is improved, the volume of the whole system is reduced, and the utility model has the advantages of high transmission efficiency, good concealment, light weight, convenient use and the like.

Drawings

For purposes of illustration and not limitation, the present invention will now be described in accordance with its preferred embodiments, particularly with reference to the accompanying drawings, in which:

FIG. 1 is a schematic structural diagram of a drug delivery drive train according to an embodiment of the present invention;

FIG. 2 is a schematic view of a cartridge vial according to an embodiment of the present invention;

FIG. 3 is a schematic view of the administration drive system of an embodiment of the present invention in operation with a cassette vial.

In the figure:

11: a motor; 12: a direction changing component; 121: a scroll bar; 122: a turbine; 13: a curvilinear transmission component; 131: a guide post; 132: a rack; 133: a revolute pair; 14: an abutting member; 15: a reduction gear set; 2: a cassette medicine bottle; 21: a dosing piston.

Detailed Description

As shown in FIG. 1, the drug delivery drive system of the embodiment of the present invention comprises a motor 11, a direction changing assembly 12, a curve driving assembly 13 and an abutting member 14. The motor 11 is used for outputting rotary motion to provide driving force to the power input end of the direction changing assembly 12. The curve transmission component 13 comprises a guide part and a toothed chain, wherein the first end of the toothed chain is used for pushing the abutting part 14 to do linear motion, and the second end of the toothed chain can do curve motion. The rack chain is a plurality of racks 132 connected in series. The guide member serves to guide the plurality of racks 132 in a curved motion. The power output end of the direction changing assembly 12 is meshed with the rack 132; the abutment 14 is connected to the dosing piston 21.

Since the motor 11 is typically faster, to match the slower rate of fluid infusion, the administration drive system may also include a reduction gear set 15 located between the motor 11 and the direction change assembly 12. The primary gear of the reduction gear set is engaged with the gear of the motor 11 fixed to the output shaft of the motor 11, and transmits the rotational motion to the final gear of the reduction gear set.

The steering assembly 12 in this embodiment may include a worm shaft 121 and a worm gear 122 that are vertically engaged with each other. The worm 121 is fixed to a gear rotating shaft of the reduction gear set, and the worm 122 outputs a rotational motion perpendicular to an input motion direction.

The curvilinear motion guide preferably employs guide posts 131 arranged along a curve. The guide posts 131 may be a plurality of cylindrical structures. The guide post 131 has the advantages of small volume and easy processing. In addition to the guide post 131, a smooth guide surface may be provided outside the rack 132.

In this embodiment, two adjacent racks 132 can be connected by a rotating pair 133, preferably, a hinge. The scheme has the advantages of mature technology and easy realization.

The curvature of the curvilinear motion trail of the second end of the toothed chain can be flexibly and reasonably set according to the actual infusion dosage and the volume of the system shell. Too large a curvature tends to cause drive jamming, and too small a curvature tends to take up too much space. Recommended curvature range is 75 to 150m^-1。

Alternatively, the administration piston 21 is a piston inside the cassette medicine bottle 2. Therefore, the drug delivery transmission system provided by the embodiment of the utility model can be directly butted with a cassette bottle in a liquid medicine delivery state for use without additionally designing a drug storage device. The scheme has the advantages of no additional cost, convenient operation, avoidance of waste of liquid medicine, volume and the like.

The drug delivery drive system may further comprise a drive stroke metering unit and a control unit. The transmission stroke metering unit is used for monitoring the stroke of the toothed chain, and the control unit controls the starting and stopping of the motor 11 according to the stroke, so that automatic control is realized.

As shown in fig. 2, the cartridge 2 according to the embodiment of the present invention has an administration piston 21 inside. The dosing piston 21 is in mating connection with an abutment 14 in the dosing drive train. The connection mode can be a fitting mode or other detachable fixing mode, so that the technical effect that the abutting part 14 can push and pull the piston is achieved.

The bottle stopper of the cassette type medicine bottle 2 can be communicated with a needle tube or an infusion pipeline, and the medicine liquid can be controllably infused into the body of a user in one unit or a plurality of units of measurement through the needle tube or the infusion pipeline.

Fig. 3 is a schematic view of the administration drive system of the embodiment of the present invention in operation with the cassette vial 2. As shown in the figure, the output shaft of the motor 11 rotates in the power-on state, and is decelerated by the spur gear and changes the moving direction by the worm wheel 122 and the worm 121, so as to drive the rack chain composed of a plurality of racks 132 to move. The second end of the toothed chain (i.e., the lower end in the figure) moves along an arcuate path guided by a plurality of guide posts 131, taking up only a small amount of movement space. The first end of the rack (i.e. the upper end in the figure) pushes the dosing piston 21 in the cartridge 2 through the abutment 14 in a rectilinear movement to infuse the liquid medicine into the infusion line communicating with the body of the user.

The above-described embodiments should not be construed as limiting the scope of the utility model. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions may occur depending on design requirements and other factors. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A drug delivery drive system, comprising: motor, diversion subassembly, curve transmission subassembly and butt piece, wherein:

the motor is used for outputting rotary motion so as to provide driving force for the power input end of the direction changing assembly;

the curve transmission assembly comprises a guide piece and a toothed chain, wherein the first tail end of the toothed chain is used for pushing the abutting part to do linear motion, the second tail end of the toothed chain can do curve motion, the toothed chain is a plurality of racks which are connected in sequence, and the guide piece is used for guiding the racks in curve motion;

the power output end of the direction changing assembly is meshed with the rack;

the abutment is connected with the dosing piston.

2. The drug delivery drive system of claim 1, further comprising: and the reduction gear set is positioned between the motor and the direction changing component.

3. The administration drive system according to claim 2, wherein the primary gear of the reduction gear set meshes with a motor gear fixed to the motor output shaft to transmit rotational motion to the final gear of the reduction gear set.

4. The administration feeding driving system according to claim 3, wherein the direction changing assembly includes a worm and a worm wheel which are engaged with each other perpendicularly, the worm is fixed with a gear rotating shaft of the reduction gear set, and the worm wheel outputs a rotational motion perpendicular to the input motion direction.

5. The drug delivery drive system of claim 1, wherein the curvilinear motion guide comprises guide posts or guide surfaces arranged along a curve.

6. The drug delivery drive system of claim 1, wherein two adjacent racks are connected by a revolute pair.

7. The administration drive system according to claim 1, wherein the administration piston is a piston inside a cartridge vial.

8. The drug delivery transmission system according to any one of claims 1 to 7, further comprising a transmission stroke metering unit for monitoring the stroke of the rack chain and a control unit for controlling the motor to start and stop according to the stroke.

9. A cartridge vial comprising an administration piston located therein, the administration piston being mateably connectable with the abutment in the administration drive system of any one of claims 1 to 8.

10. The cartridge vial according to claim 9, wherein the stopper of the cartridge vial is in communication with a needle or infusion line through which the medical fluid is controllably metered into the user in one or more units.