CN117982748A - Reciprocating circulation driven medicine injection device - Google Patents

Reciprocating circulation driven medicine injection device Download PDF

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Publication number
CN117982748A
CN117982748A CN202211332044.5A CN202211332044A CN117982748A CN 117982748 A CN117982748 A CN 117982748A CN 202211332044 A CN202211332044 A CN 202211332044A CN 117982748 A CN117982748 A CN 117982748A
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CN
China
Prior art keywords
swing arm
rotate
screw
reciprocating
pushing piece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202211332044.5A
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Chinese (zh)
Inventor
钱融
叶闯
韦劼勇
沈健
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Suzhou Hechun Medical Technology Co ltd
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Suzhou Hechun Medical Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Suzhou Hechun Medical Technology Co ltd filed Critical Suzhou Hechun Medical Technology Co ltd
Priority to CN202211332044.5A priority Critical patent/CN117982748A/en
Publication of CN117982748A publication Critical patent/CN117982748A/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/14244—Pressure infusion, e.g. using pumps adapted to be carried by the patient, e.g. portable on the body
    • A61M5/14248—Pressure infusion, e.g. using pumps adapted to be carried by the patient, e.g. portable on the body of the skin patch type
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dermatology (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The embodiment of the invention relates to a medicine injection device driven by reciprocating circulation, which comprises: a base; the screw tube is fixed on the bottom plate; the first swing arm is hinged on the screw tube; the second swing arm is hinged on the screw tube; the first driving silk thread is connected with the first swing arm and the second swing arm; the second driving silk thread is connected with the first swing arm and the second swing arm; the gear is fixed on the screw tube and driven by the first pushing piece or the second pushing piece; the screw rod is in threaded connection with the screw pipe; the plunger is fixedly connected with the screw rod; the liquid storage tank is sleeved on the plunger, the plunger is rotationally limited, and the plunger can axially move in the liquid storage tank so as to press out liquid medicine in the liquid storage tank. The device has compact structure, small volume, light weight, low cost and convenient carrying; the accurate injection of the dosing amount can be realized through the reciprocating driving setting, and the user can inject the liquid medicine with different doses according to the requirements, so that the requirements of users with different doses are met.

Description

Reciprocating circulation driven medicine injection device
Technical Field
The invention relates to the field of medical treatment, in particular to a medicine injection device driven by reciprocating circulation.
Background
The patch type drug delivery device is a medical instrument device for realizing the treatment of the disease of a patient by continuously injecting drugs into the patient. The device is widely used for treating diabetes, the application type insulin pump system is equipment widely used for insulin infusion of diabetics, and compared with a traditional insulin pump, the application type insulin pump has no pipeline, can be worn on the body, and can continuously deliver insulin within two to three days.
The existing application type drug delivery device is complex in structure, and due to the arrangement of a motor, the whole device is large in size, heavy in weight and high in cost.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a reciprocating and circulating driven drug injection device which has compact structure, small volume, light weight and lower cost; the accurate injection of the dosing amount can be realized through the reciprocating driving setting, and the user can inject the liquid medicine with different doses according to the requirements, so that the requirements of users with different doses are met.
In view of this, an embodiment of the present invention provides a reciprocating cycle driven drug infusion device, including:
A base;
the bottom of the screw tube is fixed on the bottom plate through a rotating shaft, the screw tube can rotate around the rotating shaft, and an internal thread is arranged in the screw tube;
the first swing arm is hinged to the solenoid, and a first pushing piece is arranged on the first swing arm;
the second swing arm is hinged to the solenoid, and a second pushing piece is arranged on the second swing arm;
one end of the first driving silk thread is connected with one end of the first swing arm, and the other end of the first driving silk thread is connected with one end of the second swing arm;
one end of the second driving silk thread is connected with the other end of the first swing arm, and the other end of the second driving silk thread is connected with the other end of the second swing arm;
The gear is fixed on the screw tube, is arranged between the first pushing piece and the second pushing piece and is driven by the first pushing piece or the second pushing piece;
The screw rod is in threaded connection with the screw tube, one end of the screw rod penetrates through the screw tube, and the other end of the screw rod is exposed from the screw tube;
The pushing plug is fixedly connected with the other end of the screw rod;
the liquid storage tank is sleeved on the plunger to rotate and limit the plunger, and the plunger can axially move in the liquid storage tank to press out liquid medicine in the liquid storage tank.
Preferably, the drug injection device further comprises a first limiting block, a second limiting block, a third limiting block and a fourth limiting block, which are all fixed on the base;
The first limiting block and the second limiting block are respectively arranged at two sides of the first swing arm; when the first swing arm rotates to a first limiting block along a first direction, stopping rotating; and when the first swing arm rotates to the second limiting block along the second direction, stopping rotating.
The third limiting block and the fourth limiting block are respectively arranged at two sides of the second swing arm; when the second swing arm rotates to the third limiting block along the second direction, stopping rotating; and when the second swing arm rotates to the fourth limiting block along the first direction, stopping rotating.
Preferably, both the plunger and the reservoir are oval.
Preferably, the medicine injection device driven by the reciprocating cycle further comprises a back plate, wherein the back plate is vertical and fixed on the base, and limits the liquid storage tank.
Further preferably, the drug injection device further comprises a limiting piece, wherein the limiting piece is used for axially limiting the spiral tube, one end of the limiting piece is fixed on the back plate, and the other end of the limiting piece is connected with the spiral tube; the outer wall of the spiral tube is provided with a groove, and the limiting piece is fixed in the groove.
Further preferably, the liquid storage tank is fixed on the back plate, and the back plate axially limits the liquid storage tank.
Preferably, the first swing arm comprises a first top plate, a first connecting plate and a first bottom plate, the first connecting plate is connected with the first top plate and the first bottom plate, and the first top plate and the first bottom plate are respectively hinged with the screw tube;
The second swing arm comprises a second top plate, a second connecting plate and a second bottom plate, the second connecting plate is connected with the second top plate and the second bottom plate, and the second top plate and the second bottom plate are respectively hinged with the screw tube.
Further preferably, the first top plate and the second top plate are sleeved on the upper part of the spiral tube, the first bottom plate and the second bottom plate are sleeved on the lower part of the spiral tube, and the first top plate is arranged on the second top plate;
the connection part between the bottom of the second bottom plate and the lower part of the screw pipe is provided with a fixing seat which is positioned on the base, so that the swing arm is axially limited in the rotating process.
The drug infusion device comprises the following working procedures:
The first stage, when the first driving wire is electrified, the first swing arm is driven to rotate along a first direction, and the second swing arm is driven to rotate along a second direction; the first swing arm drives the first pushing piece to push the gear to rotate along a first direction and drive the spiral tube to rotate, and the spiral tube is axially fixed, and the screw rod cannot rotate, so that the screw rod axially moves in a direction away from the spiral tube, the pushing plug is pushed to axially move to push out liquid medicine in the liquid storage tank, and meanwhile, the second swing arm drives the second pushing piece to rotate beyond the gear;
And in the second stage, when the second driving silk thread is electrified, the second swing arm is driven to rotate along the first direction, the first swing arm rotates along the second direction, the second swing arm drives the second pushing piece to push the gear to rotate along the first direction, the spiral tube is driven to rotate, and the spiral tube is axially fixed, and the screw rod cannot rotate, so that the screw rod axially moves away from the spiral tube, the pushing plug is pushed to axially move to push out the liquid medicine in the liquid storage tank, and meanwhile, the first swing arm drives the first pushing piece to pass through the gear to rotate.
Further preferably, the first direction is a clockwise direction or a counterclockwise direction, and the first direction and the second direction are opposite.
Further preferably, in each working stage, the rotation angle of the gear is an angle corresponding to half teeth, and at the same time, the ratio of the rotation angles of the first swing arm and the second swing arm to the angle corresponding to one tooth of the gear ranges from (0.5, 1).
The medicine injection device driven by the reciprocating circulation provided by the embodiment of the invention has the advantages of compact structure, small volume, light weight and lower cost; the accurate injection of the dosing amount can be realized through the reciprocating driving setting, and the user can inject the liquid medicine with different doses according to the requirements, so that the requirements of users with different doses are met.
Drawings
Fig. 1 is a schematic structural diagram of a reciprocating cycle driving drug injection device according to an embodiment of the present invention;
FIG. 2 is an exploded view of a reciprocating cycle driven drug infusion device according to an embodiment of the present invention;
FIG. 3 is a partial top view of a reciprocating cycle driven drug infusion device in accordance with an embodiment of the present invention;
fig. 4 is a schematic view of a first swing arm according to an embodiment of the present invention;
FIG. 5 is a schematic view of a second swing arm according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a combination of a base, a limiting block, a back plate and a limiting member according to an embodiment of the present invention.
Detailed Description
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Fig. 1 is a schematic structural diagram of a reciprocating-cycle-driven drug injection device according to an embodiment of the present invention, fig. 2 is an exploded schematic diagram of a reciprocating-cycle-driven drug injection device according to an embodiment of the present invention, fig. 3 is a partial top view of a reciprocating-cycle-driven drug injection device according to an embodiment of the present invention, and, in combination with fig. 1 to 3, the drug injection device includes a base 11, a coil 12, a first swing arm 13, a second swing arm 14, a first driving wire 15, a second driving wire 16, a gear 17, a screw 18, a plunger 19, and a reservoir 20.
A base 11 for securing the entire drug infusion device.
The screw tube 12, the bottom is fixed on the base 11 through the pivot 10, specifically, the one end of pivot 10 is fixed on the base 11, and the other end is connected with screw 18, and screw tube 12 can revolute the pivot 10 to, and because the other end of pivot 10 is connected with screw 18 carries out axial spacing to screw 18, makes screw 18 unable reciprocate, and further, is equipped with the internal thread in screw tube 12 for with screw 18 matched with.
The first swing arm 13 is provided with a fixed end, the fixed end is hinged on the solenoid 12, the first swing arm 13 is provided with a first pushing piece 130 which is connected with the gear 17, and the first swing arm 13 is used for swinging under the action of a driving wire, so that the first pushing piece 130 is driven to rotate, and the gear 17 is pushed to rotate.
The second swing arm 14 has a fixed end, the fixed end is hinged on the solenoid 12, the second swing arm 14 is provided with a second pushing piece 140, which is connected with the gear 17, and the second swing arm 14 is used for swinging under the action of the driving wire, so as to drive the second pushing piece 140 to rotate, and thus the gear 17 is pushed to rotate. The swing arm and the pushing piece are integrally formed, so that redundant clearance fit is eliminated, and the movement of the device is more stable and reliable.
In a specific example, the first swing arm 13 is similar to the second swing arm 14 in structure, as shown in fig. 4 and 5, the first swing arm 13 may specifically include a first top plate 131, a first connecting plate 132, and a first bottom plate 133, the first connecting plate 132 connects the first top plate 131 and the first bottom plate 133, the first top plate 131 and the first bottom plate 133 are respectively hinged with the coil 12, and the first pushing plate 130 is fixed on the first connecting plate 132; the second swing arm 14 may specifically include a second top plate 141, a second connection plate 142, and a second bottom plate 143, where the second connection plate 142 connects the second top plate 141 and the second bottom plate 143, and the second top plate 141 and the second bottom plate 143 are hinged to the coil 12 respectively, and the second push plate 140 is fixed on the second connection plate 142. In a preferred embodiment, in order to ensure the stability of the swing arm during rotation, the first top plate 131 and the second top plate 141 are sleeved on the upper portion of the screw tube 12, the first bottom plate 133 and the second bottom plate 143 are sleeved on the lower portion of the screw tube 12, the first top plate 131 is arranged on the second top plate 141, and a fixing seat 1430 is arranged at the connection between the bottom of the second bottom plate 143 and the lower portion of the screw tube 12 and is positioned on the base 11, so that the swing arm is axially limited during rotation, and the stability of the device is ensured.
One end of the first driving wire 15 is connected with one end of the first swing arm 13, and the other end is connected with one end of the second swing arm 14.
And one end of the second driving wire 16 is connected with the other end of the first swing arm 13, and the other end of the second driving wire is connected with the other end of the second swing arm 14.
The driving wires are preferably driving wires, and are electrically connected with a power supply arranged on the device, and the principle is that when the device works, a user can control the power supply to alternately electrify the two driving wires respectively through the controller, and the wires are changed from a loose state to a contracted state so as to generate driving force to drive the swing arm to rotate. Specifically, one end of the first driving wire 15 is connected with one end of the first swing arm 13, the other end is connected with one end of the second swing arm 14, one end of the second driving wire 16 is connected with the other end of the first swing arm 13, and the other end is connected with the other end of the second swing arm 14; when the first driving wire 15 is electrified, the first swing arm 13 is driven to rotate along the first direction, the second swing arm 14 is driven to rotate along the second direction, when the second driving wire 16 is electrified, the second swing arm 14 is driven to rotate along the first direction, and the first swing arm 13 is driven to rotate along the second direction. Compared with the motor drive in the prior art, the embodiment adopts a silk thread drive mode, and reduces the cost, the volume and the weight of the device.
The gear 17 is fixed on the coil 12, is perpendicular to the coil 12, is disposed between the first pushing piece 130 and the second pushing piece 140, and is driven by the first pushing piece 130 or the second pushing piece 140, and when the gear 17 rotates, the gear 17 drives the coil 12 to rotate, wherein the gear 17 preferably rotates unidirectionally to be cooperated with the screw 18 to rotate out of the coil 12.
The screw 18 is externally provided with threads and is in threaded connection with the screw tube 12, one end of the screw 18 penetrates through the screw tube 12, the other end of the screw 18 is exposed from the screw tube 12, and the screw 18 can be screwed in or out of the screw tube 12 along the axial direction, so that the axial dimension of the device can be greatly reduced, the structure is more compact, the space inside the device is released, and convenience is provided for a user.
The plunger 19 is fixedly connected with the other end of the screw 18 and moves upwards or downwards along with the screw 18 in the axial direction.
The liquid storage tank 20 is used for loading liquid medicine, is sleeved on the plunger 19, and is used for limiting the rotation of the plunger 19, namely the plunger cannot rotate, wherein the plunger 19 and the liquid storage tank 20 comprise, but are not limited to, oval shapes, so that the plunger 19 cannot rotate in the liquid storage tank 20, further, the plunger 19 can axially move in the liquid storage tank 20 so as to press out the liquid medicine in the liquid storage tank 20, and then the liquid medicine is input into subcutaneous tissues of a human body through the liquid guide tube; the medical fluid herein includes, but is not limited to, insulin, glucagon, antibiotics, nutritional liquids, analgesics, morphine, anticoagulants, gene therapy drugs, cardiovascular drugs or chemotherapeutic drugs, etc.
It will be appreciated that the direction of displacement of the plunger 19 is dependent upon the installation location of the device, including but not limited to up or down, and in particular, the plunger 19 moves up when the base 11 is installed down and the plunger 19 moves down when the base 11 is installed up.
In order to facilitate the use and wearing of the device, the drug injection device further comprises a back plate 21, the back plate 21 is vertical and fixed on the base 11, the back plate 21 has two functions, one of the two functions is matched with the use of non-woven fabrics, viscose, braces and the like to realize the wearing of the device, the device is attached to a user, the other one of the two functions is used for further rotating and limiting the liquid storage tank 20, the liquid storage tank 20 is fixed on the back plate 21, the liquid storage tank 20 is further ensured to be unable to rotate in the use process, and as a preferable scheme, limiting plates can be further arranged on the back plate 21 along the periphery of the liquid storage tank 20, so that the axial direction and the radial direction of the liquid storage tank 20 are limited, and the stability in the use process is ensured.
Further, in order to ensure stability of the screw tube 12 during operation, the drug injection device further includes a limiting member 22 for further axially limiting the screw tube 12, one end of the limiting member is fixed on the back plate 21, the other end of the limiting member is connected with the screw tube 12, specifically, a groove may be formed on an outer wall of the screw tube 12, and the limiting member 22 is fixed in the groove, thereby axially limiting the screw 18. It should be noted that, one end of the limiting member 22 may be fixed to the back plate 21, but not limited to the above.
With the understanding of the structure of the drug infusion device provided in this embodiment, the operation of the device will be described in detail with reference to the above structure.
In operation of the drug infusion device, it may in particular comprise two phases:
In the first stage, the first driving wire 15 is electrified, when the first driving wire 15 is electrified, the first swing arm 13 is driven to rotate along the first direction, the second swing arm 14 is driven to rotate along the second direction, the first swing arm 13 drives the first push piece 130 to rotate along with the rotation, the first push piece 130 pushes the gear 17 to rotate along the first direction, the gear 17 drives the spiral tube 12 to rotate, and the spiral tube 12 is axially fixed, and the spiral tube 18 cannot rotate, so that the spiral tube 18 axially moves away from the spiral tube 12, the reciprocating rotary motion is converted into stepping linear motion, the push plug 19 is pushed to axially move to press the liquid medicine in the liquid storage tank 20, meanwhile, the second swing arm 14 drives the second push piece 140 to rotate beyond the gear 17, and no pushing action is generated on the gear 17.
In the second stage, similar to the first stage, specifically, when the first driving wire 15 is energized, the second swing arm 14 is driven to rotate along the first direction, the first swing arm 13 rotates along the second direction, the second swing arm 14 drives the second push piece 140 to rotate along with the second swing arm 13, the second push piece 140 pushes the gear 17 to rotate along the first direction, the coil 12 is driven to rotate, and the screw 12 is axially fixed, and the screw 18 cannot rotate, so that the screw 18 axially moves away from the coil 12, and the reciprocating rotary motion is converted into a stepping linear motion, so that the push plug 19 is pushed to axially move to press out the liquid medicine in the liquid storage tank 20, and meanwhile, the first swing arm 13 drives the first push piece 130 to rotate beyond the gear 17.
When the device works, the first driving silk thread 15 and the second driving silk thread 16 can be electrified alternately according to the liquid medicine output requirement, so that the first swing arm 13 and the second swing arm 14 are driven in a reciprocating mode, the displacement step length of the push plug 19 is controlled accurately each time, the liquid medicine output each time is controlled accurately, the driving capability of the device is strong, the device is suitable for micro metering high-precision continuous infusion of liquid with different viscosities, in addition, the axial driving force generated by the push plug of the device is coaxially arranged with the swing arm center of the driving part, and the energy consumption of the same driving force is less. It should be noted that, when in use, a user can control the number of stages of the equipment through the required dosage, for example, the output of the liquid medicine corresponding to each stage is 1 microliter, if the dosage is 1 microliter each time, the device works for one stage, and if the dosage is 3 microliters each time, the device works for three stages, so as to realize the accurate control of different dosages.
It should be noted that, in order to ensure that the gear can rotate by an angle corresponding to half a tooth in each stage, the first swing arm or the second swing arm needs to overcome the resistance of the tooth withdrawal (over the gear), and the ratio of the rotation angle of the first swing arm and the second swing arm to the angle corresponding to one tooth of the gear is (0.5, 1), that is, the rotation angle of the first swing arm and the second swing arm is greater than the angle corresponding to half a tooth and less than the angle corresponding to half a tooth, so that the rotation angle of the first swing arm and the second swing arm is greater than the rotation angle of the gear to ensure that the gear can rotate by an angle of half a tooth in each stage.
It can be understood that the measurement of the final output liquid medicine of the device is determined by the plunger displacement step length, each displacement step length is related to each rotation angle, gear tooth number and thread interval of the swing arm, for example, the smaller the rotation angle of the swing arm is, the more the gear tooth number is, the smaller the thread interval is, the smaller the displacement distance of the plunger is, the more accurate the liquid medicine output is, and the related rotation angle, gear tooth number and thread interval of the swing arm can be set according to the requirement of each medicine feeding amount by a person skilled in the art.
For the purpose of precisely controlling the rotation angle, a method of limiting the rotation angle by the limiting block is provided in a preferred embodiment, and in combination with fig. 6, the device further includes a first limiting block 231, a second limiting block 232, a third limiting block 233 and a fourth limiting block 234, which are all fixed on the base 11, where the first limiting block 231 and the second limiting block 232 are used for limiting the first swing arm 13, and the third limiting block 233 and the fourth limiting block 234 are used for limiting the second swing arm 14. Specifically, the first limiting block 231 and the second limiting block 232 are respectively disposed at two sides of the first swing arm 13; when the first swing arm 13 rotates to the first stopper 231 in the first direction, the rotation is stopped; when the first swing arm 13 rotates to the second stopper 232 in the second direction, the rotation is stopped. The third limiting block 233 and the fourth limiting block 234 are respectively arranged at two sides of the second swing arm 14; when the second swing arm 14 rotates to the third limit block 233 along the second direction, the rotation is stopped; when the second swing arm 14 rotates in the first direction to the fourth stopper 234, the rotation is stopped. The swing angle of the swing arm can be accurately controlled by the limit of the limiting block.
In the above embodiments and the drawings, the first direction is a counterclockwise direction, and those skilled in the art can set the first direction as required, and the first direction may be a clockwise direction or a counterclockwise direction, and the first direction and the second direction are opposite.
The medicine injection device driven by the reciprocating circulation provided by the embodiment of the invention has the advantages of compact structure, small volume, light weight and lower cost; the accurate injection of the dosing amount can be realized through the reciprocating driving setting, and the user can inject the liquid medicine with different doses according to the requirements, so that the requirements of users with different doses are met.
In the present invention, the term "plurality" means two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "front", "rear", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or units referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present invention.
In the description herein, the terms "one particular embodiment," "some embodiments," "one embodiment," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing description of the embodiments has been provided for the purpose of illustrating the general principles of the invention, and is not meant to limit the scope of the invention, but to limit the invention to the particular embodiments, and any modifications, equivalents, improvements, etc. that fall within the spirit and principles of the invention are intended to be included within the scope of the invention.

Claims (10)

1. A reciprocating cyclically driven drug infusion device, said drug infusion device comprising:
A base;
the bottom of the screw tube is fixed on the bottom plate through a rotating shaft, the screw tube can rotate around the rotating shaft, and an internal thread is arranged in the screw tube;
the first swing arm is hinged to the solenoid, and a first pushing piece is arranged on the first swing arm;
the second swing arm is hinged to the solenoid, and a second pushing piece is arranged on the second swing arm;
one end of the first driving silk thread is connected with one end of the first swing arm, and the other end of the first driving silk thread is connected with one end of the second swing arm;
one end of the second driving silk thread is connected with the other end of the first swing arm, and the other end of the second driving silk thread is connected with the other end of the second swing arm;
The gear is fixed on the screw tube, is arranged between the first pushing piece and the second pushing piece and is driven by the first pushing piece or the second pushing piece;
The screw rod is in threaded connection with the screw tube, one end of the screw rod penetrates through the screw tube, and the other end of the screw rod is exposed from the screw tube;
The pushing plug is fixedly connected with the other end of the screw rod;
the liquid storage tank is sleeved on the plunger to rotate and limit the plunger, and the plunger can axially move in the liquid storage tank to press out liquid medicine in the liquid storage tank.
2. The reciprocating endless drive medication injection device of claim 1 further comprising a first stopper, a second stopper, a third stopper, and a fourth stopper, all secured to said base;
The first limiting block and the second limiting block are respectively arranged at two sides of the first swing arm; when the first swing arm rotates to a first limiting block along a first direction, stopping rotating; when the first swing arm rotates to the second limiting block along the second direction, stopping rotating;
The third limiting block and the fourth limiting block are respectively arranged at two sides of the second swing arm; when the second swing arm rotates to the third limiting block along the second direction, stopping rotating; and when the second swing arm rotates to the fourth limiting block along the first direction, stopping rotating.
3. The reciprocating cyclically driven drug infusion device of claim 1 wherein both said plunger and reservoir are elliptical.
4. The reciprocating cyclically driven drug infusion device of claim 1 further comprising a back plate that is perpendicular to and secured to the base and that limits the reservoir.
5. The reciprocating cyclically driven drug infusion device of claim 4 further comprising a stop member for axially stopping the coil, one end of which is secured to the back plate and the other end of which is connected to the coil; the outer wall of the spiral tube is provided with a groove, and the limiting piece is fixed in the groove.
6. The reciprocating cyclically driven drug infusion device of claim 1 wherein said first swing arm comprises a first top plate, a first connecting plate and a first bottom plate, said first connecting plate connecting said first top plate and said first bottom plate, said first top plate, said first bottom plate being hinged to said coils, respectively;
The second swing arm comprises a second top plate, a second connecting plate and a second bottom plate, the second connecting plate is connected with the second top plate and the second bottom plate, and the second top plate and the second bottom plate are respectively hinged with the screw tube.
7. The reciprocally driven drug infusion device of claim 6, wherein,
The first top plate and the second top plate are sleeved on the upper part of the spiral tube, the first bottom plate and the second bottom plate are sleeved on the lower part of the spiral tube, and the first top plate is arranged on the second top plate;
the connection part between the bottom of the second bottom plate and the lower part of the screw pipe is provided with a fixing seat which is positioned on the base, so that the swing arm is axially limited in the rotating process.
8. The reciprocating cyclically driven drug infusion device of claim 1, wherein the drug infusion device is operative to:
The first stage, when the first driving wire is electrified, the first swing arm is driven to rotate along a first direction, and the second swing arm is driven to rotate along a second direction; the first swing arm drives the first pushing piece to push the gear to rotate along a first direction and drive the spiral tube to rotate, and the spiral tube is axially fixed, and the screw rod cannot rotate, so that the screw rod axially moves in a direction away from the spiral tube, the pushing plug is pushed to axially move to push out liquid medicine in the liquid storage tank, and meanwhile, the second swing arm drives the second pushing piece to rotate beyond the gear;
And in the second stage, when the second driving silk thread is electrified, the second swing arm is driven to rotate along the first direction, the first swing arm rotates along the second direction, the second swing arm drives the second pushing piece to push the gear to rotate along the first direction, the spiral tube is driven to rotate, and the spiral tube is axially fixed, and the screw rod cannot rotate, so that the screw rod axially moves away from the spiral tube, the pushing plug is pushed to axially move to push out the liquid medicine in the liquid storage tank, and meanwhile, the first swing arm drives the first pushing piece to pass through the gear to rotate.
9. The reciprocating cyclically driven drug infusion device of claim 2 or 8, wherein the first direction is clockwise or counter-clockwise and the first direction is opposite the second direction.
10. The reciprocating cyclically driven drug infusion device of claim 8 wherein at each stage of operation the gear rotates through an angle corresponding to half a tooth and at the same time the ratio of the angle of rotation of the first and second swing arms to the angle corresponding to one tooth of the gear ranges from (0.5, 1).
CN202211332044.5A 2022-10-28 2022-10-28 Reciprocating circulation driven medicine injection device Pending CN117982748A (en)

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CN202211332044.5A CN117982748A (en) 2022-10-28 2022-10-28 Reciprocating circulation driven medicine injection device

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