CN115105679A - Drive reset type liquid medicine infusion device - Google Patents

Abstract

The invention discloses a driving reset type liquid medicine infusion device which comprises an infusion assembly, a pushing assembly, a memory alloy driving assembly and a control assembly, wherein the infusion assembly is used for injecting liquid medicine into a patient, the pushing assembly is used for pushing the infusion assembly to infuse the liquid medicine into the patient, the memory alloy driving assembly is connected with the pushing assembly and used for driving the pushing assembly to push through thermal deformation of memory alloy, the control assembly is electrically connected with the memory alloy driving assembly and used for controlling the memory alloy driving assembly to work, the pushing assembly, the memory alloy driving assembly and the control assembly are of an integral structure, the pushing assembly comprises a pushing screw rod which is detachably connected with the infusion assembly and used for extending out of the pushing infusion assembly to infuse the liquid medicine into the patient, and the driving reset type liquid medicine infusion device further comprises a reset assembly which is detachably connected with the pushing assembly and used for extending out of the pushing screw rod to retract and reset after pushing.

Description

Drive reset type liquid medicine infusion device

Technical Field

The invention relates to the technical field of medical equipment, in particular to a reset-driven liquid medicine infusion device.

Background

In the treatment process of a patient, the liquid medicine is injected into the body of the patient through the liquid medicine infusion device, and the liquid medicine infusion device of the insulin pump can mediate the patient according to the characteristics of physiological secretion of insulin at different time through simulating a physiological insulin secretion mode, so that the insulin pump is more humanized and more conforms to the liquid medicine infusion device of the physiological insulin secretion mode.

The existing insulin pump generally comprises a control part, a driving part, a pushing part and an infusion part, wherein the control part is used for controlling the driving part to work so as to provide pushing power for the pushing part and further control the infusion part to infuse insulin into a patient body, according to the relevant regulations of medical equipment, after the infusion part completes infusion operation, the infusion part needs to be abandoned in a proper treatment mode, however, in order to ensure stable and reliable work in the using process, the insulin pump is designed by adopting an integral structure, so that the disassembly and assembly of the insulin pump are troublesome, and because the infusion part generally comprises a liquid storage pipe for storing liquid medicine and a piston arranged in the liquid storage pipe, the pushing part adopts a screw rod capable of moving in a stepping mode to push the piston to move so as to realize liquid medicine infusion, the screw rod extends out in the process of infusing the liquid medicine, but is difficult to retract and reset after the liquid medicine infusion is completed, due to the reasons, the existing insulin pump is equivalent to a disposable article and can only be discarded after being used, the use cost of a patient is greatly increased, the use cost is high for a long time and is not accepted by type 2 diabetics and gestational diabetics, parts such as a motor, an encoder, a reduction box and a catheter are adopted by a driving part in most insulin pumps, the size of the insulin pump is large, the number of parts capable of being selectively infused is small, and the insulin pump is inconvenient to carry and poor in concealment due to the large size and the long catheter, and is easy to suffer from different peripheral eyes.

Disclosure of Invention

The invention provides a reset-driven liquid medicine infusion device, which solves the technical problems that an insulin pump can only be discarded after being used by a patient, is expensive after being used for multiple times, and is large in size and inconvenient to carry.

According to one aspect of the present invention, there is provided a drive reset type medical fluid infusion device comprising an infusion set for infusing a medical fluid into a patient, a push set for pushing the infusion set to infuse the medical fluid into the patient, the memory alloy drive assembly who is used for through memory alloy thermal deformation with drive push assembly promotion work that is connected with push assembly and the control assembly who is used for controlling memory alloy drive assembly work of being connected with memory alloy drive assembly electricity, push assembly, memory alloy drive assembly and control assembly are monolithic structure, push assembly includes can dismantle with the infusion subassembly be connected be used for stretching out to push away the push screw that pushes away infusion subassembly in order to carry out the liquid medicine infusion to the patient, drive formula liquid medicine infusion device that resets still including being used for can dismantle with push assembly and be connected so that push screw stretches out to push away the reset assembly that the back shrink resets.

As a further improvement of the above technical solution:

further, the infusion subassembly includes the stock solution spare that is used for storing the liquid medicine that can dismantle with the push screw and is connected and with the infusion spare intercommunication that is used for infusing the liquid medicine into the patient.

Further, the stock solution spare includes the stock solution casing and lays the piston in the stock solution casing, and the piston is equipped with square groove towards the terminal surface recess that promotes the lead screw, promotes the lead screw and is equipped with the square head of pegging graft complex with square groove towards the tip of piston.

Furthermore, the pushing assembly comprises an installation shell, a ratchet mechanism, a screw rod sleeve and a swinging piece, the ratchet mechanism is rotatably arranged on the installation shell, the screw rod sleeve is fixedly arranged in the ratchet mechanism and sleeved outside the pushing screw rod, the swinging piece is rotatably arranged on the installation shell and arranged corresponding to the ratchet mechanism, the swinging piece is connected with the memory alloy driving assembly, and the resetting assembly is detachably connected with the ratchet mechanism and the pushing screw rod respectively.

Furthermore, the memory alloy driving assembly comprises guide posts respectively arranged at two opposite ends of the swinging piece, a memory alloy wire which is rotatably sleeved on the guide posts and is connected with the swinging piece and used for being heated and contracted after being electrified, a first communicating piece which is connected with the first end of the memory alloy wire and is used for being electrically connected with the control assembly so as to enable the first end of the memory alloy wire to be heated and contracted and further drive the swinging piece to swing towards the first end of the memory alloy wire, and a second communicating piece which is connected with the second end of the memory alloy wire and is used for being electrically connected with the control assembly so as to enable the second end of the memory alloy wire to be heated and contracted and further drive the swinging piece to swing towards the second end of the memory alloy wire.

Further, the control assembly comprises a control circuit board and a controller electrically connected with the control circuit board, and the control circuit board is respectively contacted with the first communicating piece and the second communicating piece.

Furthermore, the installation shell comprises connecting columns arranged along the height direction of the installation shell, the swinging piece is rotatably sleeved on the connecting columns, and the swinging piece comprises a crimping part which is arranged between the two guide columns and is in crimping connection with the memory alloy wire and used for swinging along with the heat shrinkage of the memory alloy wire and a pushing part which is arranged corresponding to the ratchet mechanism and used for pushing the ratchet mechanism to rotate along with the swinging of the crimping part.

Furthermore, the end portion, far away from the crimping portion, of the installation shell is provided with a plurality of limiting columns arranged along the height direction of the installation shell, the limiting columns are arranged at intervals along the length direction of the installation shell to form limiting gaps, and the end portion, far away from the crimping portion, of the swinging piece is provided with a limiting portion which is formed by extending along the length direction of the swinging piece and extends into the limiting gaps and used for abutting against the limiting columns to limit the swinging range of the swinging piece in the swinging process of the swinging piece.

Further, ratchet mechanism is including rotationally laying on the installation casing and fixed cover locate the outer axis of rotation of screw cover, can one-way rotation ground cover locate the outer ratchet of axis of rotation and along the circumference of ratchet a plurality of ratchets of arranging in proper order, and the axis of rotation can be dismantled with reset assembly and be connected.

Furthermore, the reset assembly comprises a reset motor, a connecting sleeve and a movable sleeve, wherein the connecting sleeve is arranged on an output shaft of the reset motor and is detachably connected with the rotating shaft in a driving manner, and the movable sleeve is detachably connected with the push screw rod and is used for preventing the push screw rod from rotating in the circumferential direction.

The invention has the following beneficial effects:

when liquid medicines such as insulin and the like need to be infused into a patient, the memory alloy driving assembly is controlled by the control assembly to work after being electrified, so that the memory alloy in the memory alloy driving assembly is heated and deformed to drive the pushing assembly to work, the pushing screw rod extends out to abut against the infusion assembly to infuse the liquid medicine into the patient, the liquid medicine infusion treatment of the patient is realized, the pushing screw rod and the infusion assembly can be directly separated after the liquid medicine infusion is finished, the resetting assembly is connected with the pushing assembly to enable the pushing screw rod to contract and reset, the control assembly, the memory alloy driving assembly and the pushing assembly can be reused after being assembled with a new infusion assembly, and the infusion assembly is discarded in a proper treatment mode; the scheme realizes the reutilization of the control assembly, the memory alloy driving assembly and the pushing assembly through the resetting assembly, is economic and environment-friendly, is beneficial to the recycling of resources, only abandons the infusion assembly which needs to be abandoned under the condition of meeting the relevant regulations of medical equipment, and the patient can use the infusion assembly normally only by purchasing little cost to replace the infusion assembly, thereby greatly reducing the use cost of the patient for long-time use, providing driving power by using a memory alloy heat deformation mode, compared with the prior driving part, the device does not need to use a motor, a speed reducer and other devices, is beneficial to the miniaturization, is convenient to carry and use, has more selectable infusion parts, such as abdomen, limbs and the like, can reduce the possibility of complications caused by always infusing the same part, further reduces the production cost of the device, and meets the requirements of type 1 diabetes patients, is convenient for being popularized to type 2 diabetics and gestational diabetics, has strong practicability and is suitable for wide popularization and application.

In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic diagram of a reset-driven medical fluid infusion device in accordance with a preferred embodiment of the present invention;

FIG. 2 is a disassembled schematic view of the reset-driven medical fluid infusion device in accordance with the preferred embodiment of the present invention;

FIG. 3 is a schematic perspective view of a reset-driven medical fluid infusion device in accordance with a preferred embodiment of the present invention;

FIG. 4 is an exploded view of the pusher assembly of the drive reset medical fluid infusion device of FIG. 3;

fig. 5 is a partially exploded view of the pusher assembly of the drive reset medical fluid infusion device of fig. 3.

Illustration of the drawings:

1. an infusion assembly; 2. a pushing assembly; 21. pushing the screw rod; 22. installing a shell; 221. connecting columns; 222. a limiting column; 23. a ratchet mechanism; 231. a rotating shaft; 232. a ratchet wheel; 24. a screw rod sleeve; 25. a swinging member; 251. a crimping part; 252. a pushing part; 253. a limiting part; 3. a memory alloy drive component; 31. a guide post; 32. memorizing alloy wires; 33. a first communication member; 34. a second communicating member; 4. a control component; 5. a reset assembly; 51. resetting the motor; 52. connecting sleeves; 53. a movable sleeve.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the accompanying drawings, but the invention can be embodied in many different forms, which are defined and covered by the following description.

FIG. 1 is a schematic diagram of a reset-driven medical fluid infusion device in accordance with a preferred embodiment of the present invention; FIG. 2 is a disassembled schematic view of the reset-driven medical fluid infusion device in accordance with the preferred embodiment of the present invention; FIG. 3 is a schematic perspective view of a reset-driven medical fluid infusion device in accordance with a preferred embodiment of the present invention; FIG. 4 is an exploded view of the pusher assembly of the drive reset medical fluid infusion device of FIG. 3; fig. 5 is a partially exploded view of the pusher assembly of the drive reset medical fluid infusion device of fig. 3.

As shown in fig. 1-3, the reset-driven medical fluid infusion device of the present embodiment includes an infusion set 1 for infusing medical fluid into a patient, a pushing set 2 for pushing the infusion set 1 to infuse medical fluid into the patient, the memory alloy drive assembly 3 that is used for promoting work with drive push assembly 2 through memory alloy thermal deformation and be connected with memory alloy drive assembly 3 is used for controlling memory alloy drive assembly 3 work's control assembly 4 that is connected with memory alloy drive assembly 2, push assembly 2, memory alloy drive assembly 3 and control assembly 4 are monolithic structure, push assembly 2 includes can dismantle with infusion subassembly 1 and be connected be used for stretching out to push away infusion subassembly 1 in order to carry out the promotion lead screw 21 of liquid medicine infusion to the patient, drive reset formula liquid medicine infusion set still including be used for with push assembly 2 can dismantle be connected so that push away lead screw 21 stretch out to push away the reset subassembly 5 that the back contraction was reset. Specifically, when liquid medicines such as insulin and the like need to be infused into a patient, the memory alloy driving assembly 3 is controlled by the control assembly 4 to be powered on and then work, so that the memory alloy in the memory alloy driving assembly 3 is heated and deformed to drive the pushing assembly 2 to work, the pushing screw rod 21 extends out to abut against the pushing infusion assembly 1 to infuse the liquid medicines into the patient, the liquid medicine infusion treatment of the patient is realized, after the liquid medicine infusion is finished, the pushing screw rod 21 and the infusion assembly 1 can be directly separated, the reset assembly 5 is connected with the pushing assembly 2 to enable the pushing screw rod 21 to contract and reset, the control assembly 4, the memory alloy driving assembly 3 and the pushing assembly 2 can be reused after being assembled with a new infusion assembly 1, and the infusion assembly 1 is discarded in a proper treatment mode; the scheme realizes the reutilization of the control component 4, the memory alloy driving component 3 and the pushing component 2 through the resetting component 5, is economic and environment-friendly, is beneficial to the recycling of resources, only discards the infusion component 1 which needs to be discarded under the condition of meeting the relevant regulations of medical equipment, and can be normally used by patients only by purchasing the infusion component 1 for replacement with little cost, thereby greatly reducing the use cost of the patients for long-time use, provides driving power by using a memory alloy heat deformation mode, does not need to use a motor, a speed reducer and other devices compared with the existing driving part, is beneficial to the miniaturization of the device, is convenient to carry and use, has more selectable infusion parts, such as abdomen, limbs and the like, can reduce the possibility of complications caused by always infusing the same part, and further reduces the production cost of the device, the requirements of the type 1 diabetes mellitus patients are met, meanwhile, the popularization to the type 2 diabetes mellitus patients and the gestational diabetes mellitus patients is facilitated, the practicability is high, and the popularization and the application are suitable.

In this embodiment, the drive reset type liquid medicine infusion device further comprises a housing and a bottom plate detachably connected with the housing, the control assembly 4, the memory alloy drive assembly 3 and the execution assembly are fixedly arranged on the housing, and the infusion assembly 1 is fixedly arranged on the bottom plate. Specifically, after the infusion component 1 infuses the liquid medicine, the shell and the bottom plate are detached, then the bottom plate and the infusion component 1 fixedly arranged on the bottom plate are discarded in a reasonable mode, and the shell, the control component 4 fixedly arranged on the shell, the memory alloy driving component 3 and the execution component are recycled.

In this embodiment, the infusion assembly 1 includes a liquid storage part detachably connected to the push screw 21 for storing the liquid medicine and an infusion part communicated with the liquid storage part for injecting the liquid medicine into the patient. Specifically, the pushing screw rod 21 pushes the liquid medicine of the liquid storage part into the infusion part, and then the liquid medicine is infused into the body of the patient through the infusion part, so that the infusion of the liquid medicine is realized. Optionally, the infusion part comprises a needle tube, a rubber tube and a needle tube control mechanism for driving a needle of the needle tube to be implanted and pulled out, the needle of the needle tube is preferably a stainless steel needle, so that possible bacterial infection is reduced, the needle tube is connected with the liquid storage part through a hose, and liquid is supplied to the needle tube from the liquid storage part; the rubber tube is sleeved outside the needle tube, the needle tube and the rubber tube can move relatively, when infusion is needed to be carried out on a patient, the needle tube control mechanism controls the needle head of the needle tube to extend out of the rubber tube, after the infusion is completed, the needle head on the needle tube is controlled by the needle tube control mechanism to be retracted into the rubber tube again, and pain of the patient caused by the fact that the needle head exists in the body for a long time is reduced. Optionally, the bottom plate is attached to one side of the body of the patient and is provided with an attaching piece, a needle hole is formed in the attaching piece, a needle head on the needle tube can penetrate through the needle hole to conduct medicine infusion on the patient, the long catheter is replaced by the attaching mode, and the phenomenon that the patient is uncomfortable due to friction between the catheter and the body of the user when the long catheter is used and the fact that the long catheter is possibly hung on other objects and the like is avoided.

In the embodiment, the needle tube control mechanism comprises a mounting frame, a sliding block component, an inclined plane stop block component and an elastic component, the mounting frame is arranged in the shell, the elastic component comprises a screw, one end of the mounting frame is provided with the screw, the outer side of the screw is sleeved with a torsion spring, the outer side of the screw is rotatably connected with a herringbone arm, the two arms of the herringbone arm are rotatably connected, the rotation of the torsion spring can drive the herringbone arm to extend or contract, the herringbone arm comprises a first connecting rod rotatably connected to the outer side of the screw and a second connecting rod rotatably connected with the first connecting rod, the outer end of the second connecting rod is rotatably connected with a sliding part on the sliding block component, the sliding component comprises a first sliding block, a second sliding block and a sliding rail, the outer end of the second connecting rod can drive the first sliding block to slide on the sliding rail of the sliding block component, the inclined plane stop block component penetrates through the shell, one end of the inclined plane component, which is positioned in the shell, is connected with the stop block, the stop block is positioned between the first sliding block and the second sliding block and is divided into two using states, one is that when the inclined plane stop block component is pulled outwards, the stop block is pulled away from the position between the first sliding block and the second sliding block, and at the moment, the torsional spring rotates to reset and drives the herringbone arm to extend in the resetting process so as to push the first sliding block and the second sliding block to move on the sliding rail; when the inclined plane stop block assembly is pressed down, the stop block pushes the first sliding block to reset, so that the contact position of the stop block and the first sliding block is in inclined plane fit, the first sliding block is convenient to reset, when the stop block pushes the first sliding block to completely reset, the stop block is positioned between the first sliding block and the second sliding block to separate the first sliding block and the second sliding block, at the moment, the torsion spring is twisted, and the torsion spring has the tendency of resetting to push the first sliding block to move, so that the force is accumulated for pushing the first sliding block next time; be equipped with first conduction groove on the first slider, be equipped with the second conduction groove on the second slider, the second conduction groove is used for holding the rubber tube, is equipped with the adaptation chamber on the second slider, is equipped with salient in the location portion of rubber tube on the rubber tube, and location portion adaptation is in the adaptation intracavity, and the needle tubing penetrates in the rubber tube through this location portion. Preferably, after the infusion is completed, the rubber tube is reserved in a reserved tube on the skin of the patient, the needle tube is retracted into the shell, so that the problem of complications caused by the fact that the needle is reserved in the patient is solved, specifically, a blocking hole is formed in one end, far away from the first sliding block, of the second sliding block, a spring thimble is correspondingly arranged on the front cover, after the second sliding block slides to a certain position, the spring thimble pops out and is inserted into the blocking hole, the second sliding block is fixed, so that the rubber tube cannot be driven to retract, the first sliding block resets and retracts under the retraction effect of the herringbone arm, the needle tube is finally retracted into the rubber tube, and when the next infusion is performed, the needle tube is pushed out through the operation of the button piece and the movement of the first sliding block.

In this embodiment, stock solution spare includes stock solution casing and lays the piston in the stock solution casing, and the piston is equipped with square groove towards the terminal surface recess that promotes lead screw 21, promotes lead screw 21 and is equipped with the square head of grafting complex with square groove towards the tip of piston. Specifically, the piston can release the liquid medicine in the stock solution casing in to the infusion piece when removing in the stock solution casing, through square groove and square head grafting cooperation, square head restriction square head circumferential direction, and then the restriction promotes lead screw 21 circumferential direction, promotes lead screw 21 axial displacement and can drive piston axial displacement, realizes the liquid medicine infusion.

As shown in fig. 4 and fig. 5, in the present embodiment, the pushing assembly 2 includes a mounting housing 22, a ratchet mechanism 23 rotatably disposed on the mounting housing 22, a screw sleeve 24 fixedly disposed in the ratchet mechanism 23 and sleeved outside the pushing screw 21, and a swinging member 25 rotatably disposed on the mounting housing 22 and disposed corresponding to the ratchet mechanism 23, the swinging member 25 is connected to the memory alloy driving assembly 3, and the resetting assembly 5 is detachably connected to the ratchet mechanism 23 and the pushing screw 21, respectively. Specifically, the swinging piece 25, the ratchet mechanism 23, the screw rod sleeve 24 and the pushing screw rod 21 are stably supported through the mounting shell 22, so as to ensure the reliability of the mutual motion among the swinging piece 25, the ratchet mechanism 23, the screw rod sleeve 24 and the pushing screw rod, when the liquid medicine infusion is carried out, the memory alloy driving component 3 drives the swinging piece 25 to swing back and forth so as to drive the ratchet mechanism 23 to rotate in a stepping forward direction and further drive the screw rod sleeve 24 to rotate in a stepping forward direction and further drive the pushing screw rod 21 to extend out and push in a stepping manner, so as to realize the infusion of the liquid medicine into the body of a patient, after the liquid medicine infusion is finished, the ratchet mechanism 23 and the pushing screw rod 21 are connected with the resetting component 5, so that the resetting component 5 drives the ratchet mechanism 23 to rotate in a reverse direction and further drive the screw rod sleeve 24 to rotate in a stepping manner so as to drive the pushing screw rod 21 to contract and reset in the screw rod sleeve 24, so that the pushing component 2 can push the next infusion component 1, the infusion of the medical fluid of the next infusion set 1 is completed. It should be understood that the push screw 21 is detachably connected to the infusion set 1 or the reset assembly 5, and when the ratchet mechanism 23 drives the screw sleeve 24 to rotate, the push screw 21 can only move axially to complete the infusion operation of the infusion set 1 or move axially to achieve the retraction reset, but cannot synchronously rotate along with the rotation of the screw sleeve 24, i.e. the push screw 21 is circumferentially fixed.

As shown in fig. 4 and fig. 5, in the present embodiment, the ratchet mechanism 23 includes a rotating shaft 231 rotatably disposed on the mounting housing 22 and fixedly sleeved outside the screw sleeve 24, a ratchet wheel 232 unidirectionally rotatably sleeved outside the rotating shaft 231, and a plurality of ratchet teeth sequentially arranged along the circumferential direction of the ratchet wheel 232, and the rotating shaft 231 is detachably connected to the restoring assembly 5. Specifically, when the liquid medicine needs to be infused, the swinging piece 25 pushes the ratchet to drive the ratchet wheel 232 to rotate in the forward direction, at the moment, the ratchet wheel 232 drives the rotating shaft 231 to rotate in the forward direction, and then the screw rod sleeve 24 is driven to rotate in the forward direction, so that the extension and pushing of the continuous pushing screw rod 21 are realized; when the reset assembly 5 drives the rotating shaft 231 to rotate reversely, the rotating shaft 231 rotates reversely relative to the ratchet wheel 232, i.e. the ratchet wheel 232 is fixed differently, and will not interfere with the swinging member 25, the rotating shaft 231 drives the screw rod sleeve 24 to rotate reversely, and further drives the pushing screw rod to move axially, contract and reset in the screw rod sleeve 24. Alternatively, the rotating shaft 231 has a sleeve structure with a hollow inside.

As shown in fig. 1 and 2, in the present embodiment, the reset assembly 5 includes a reset motor 51, a connecting sleeve 52 disposed on an output shaft of the reset motor 51 and detachably connected to the rotating shaft 231 in a driving manner, and a movable sleeve 53 detachably connected to the push screw 21 for preventing the push screw 21 from rotating circumferentially. Specifically, the reset motor 51 works to drive the output shaft to rotate, and further drive the connecting sleeve 52 to rotate, so as to drive the rotating shaft 231 to rotate, and finally drive the screw rod sleeve 24 to rotate, and since the movable sleeve 53 prevents the push screw rod 21 from rotating circumferentially, the push screw rod 21 moves axially relative to the screw rod sleeve 24, so as to realize the contraction reset of the push screw rod 21. Optionally, the movable sleeve 53 includes a movable sleeve 53 coaxially disposed with the push screw 21, a movable limiting block movably disposed in the movable sleeve 53 along the axial direction and detachably connected to the extending end of the push screw 21, and a supporting seat supporting the movable sleeve 53 from the bottom, and is connected to the push screw 21 through the movable limiting block to prevent the push screw 21 and the screw sleeve 24 from synchronously rotating in the circumferential direction. Optionally, a square head is arranged at the extending end of the pushing screw rod 21, and a square groove in inserting fit with the square head is concavely arranged on the movable limiting block. Optionally, the reset-driven medical fluid infusion device further comprises a power source assembly electrically connected with the control assembly 4 for providing working electric energy to the control assembly 4. Optionally, the reset assembly 5 further comprises a charging member detachably connected to the energy source assembly for supplying electrical energy to the energy source assembly.

As shown in fig. 1-3, in the present embodiment, the memory alloy driving assembly 3 includes guide posts 31 respectively disposed at two opposite ends of the swinging member 25, a memory alloy wire 32 rotatably sleeved on the guide posts 31 and connected to the swinging member 25 for thermal contraction after being energized, a first communicating member 33 connected to a first end of the memory alloy wire 32 and electrically connected to the control assembly 4 for enabling the first end of the memory alloy wire 32 to be thermally contracted and further driving the swinging member 25 to swing toward the first end of the memory alloy wire 32, and a second communicating member 34 connected to a second end of the memory alloy wire 32 and electrically connected to the control assembly 4 for enabling the second end of the memory alloy wire 32 to be thermally contracted and further driving the swinging member 25 to swing toward the second end of the memory alloy wire 32. Specifically, the control assembly 4 is communicated with the first communicating member 33 and disconnected from the second communicating member 34, so that the first end of the memory alloy wire 32 is electrified and heated to contract, and the swinging member 25 is driven to swing towards the first end of the memory alloy wire 32; the control component 4 is disconnected from the first communicating member 33 and communicated with the second communicating member 34, so that the second end of the memory alloy wire 32 is electrified and heated to contract, and further the swinging member 25 is driven to swing towards the second end of the memory alloy wire 32, so as to realize the reciprocating swing of the swinging member 25 in a secondary cycle reciprocating manner. It should be understood that the specific material of the memory alloy wire 32 belongs to the known technology of those skilled in the art, and will not be described herein too much as long as the thermal contraction after the power-on can be achieved.

In this embodiment, the control assembly 4 includes a control circuit board and a controller electrically connected to the control circuit board, and the control circuit board is in contact with the first communicating member 33 and the second communicating member 34, respectively. Specifically, the controller controls the control circuit board to realize that when the first communicating piece 33 is electrified with the control circuit board, the second communicating piece 34 is disconnected with the control circuit board to drive the swinging piece 25 to swing towards the first end of the memory alloy wire 32; or when the second communicating piece 34 is electrified with the control circuit board, the first communicating piece 33 is disconnected with the control circuit board, and the swinging piece 25 is driven to swing towards the second end of the memory alloy wire 32. It should be understood that the specific structure of the control circuit board belongs to the known technology of the person skilled in the art, and will not be described in too much here. Optionally, the controller is a PLC controller. It should be understood that the specific structure of the PLC controller belongs to the known technology of those skilled in the art, and will not be described in too much detail herein.

As shown in fig. 4, in the present embodiment, the mounting housing 22 includes a connecting column 221 arranged along the height direction of the mounting housing 22, the swinging member 25 is rotatably sleeved on the connecting column 221, and the swinging member 25 includes a crimping portion 251 arranged between the two guiding columns 31 and crimped with the memory alloy wire 32 for swinging along with the thermal contraction of the memory alloy wire 32, and a pushing portion 252 arranged corresponding to the ratchet mechanism 23 for pushing the ratchet mechanism 23 to rotate along with the swinging of the crimping portion 251. Specifically, the memory alloy wire 32 is repeatedly heated and contracted towards the first end of the memory alloy wire 32 or towards the second end of the memory alloy wire 32, so as to drive the pressing part 251 to repeatedly swing, further drive the swinging part 25 to repeatedly swing, further drive the pushing part 252 to repeatedly push the ratchet mechanism 23, and realize the rotation of the ratchet mechanism 23.

As shown in fig. 4, in the present embodiment, the end of the mounting housing 22 away from the crimping portion 251 is provided with a plurality of limiting posts 222 arranged along the height direction of the mounting housing 22, the plurality of limiting posts 222 are arranged at intervals along the length direction of the mounting housing 22 and form a limiting gap, and the end of the swinging member 25 away from the crimping portion 251 is provided with a limiting portion 253 extending along the length direction of the swinging member 25 and extending into the limiting gap for abutting against the limiting posts 222 to limit the swinging range of the swinging member 25 during the swinging process of the swinging member 25. Specifically, in the swinging process of the swinging member 25, the limiting portion 253 swings synchronously, and because the limiting portion 253 extends into the limiting gap and is abutted and limited by the limiting column 222, the swinging member can only swing in the limiting gap, so that the swinging range of the swinging member 25 is correspondingly limited, the situation that the pushing portion 252 is separated from the pushing area of the ratchet due to the overlarge swinging range of the swinging member 25 is avoided, and the pushing area is possibly interfered and blocked by the interference of the ratchet, and the stability and reliability of the movement of the swinging member 25 are ensured.

As shown in fig. 4, in this embodiment, be equipped with on the lateral wall of installation casing 22 and extend a plurality of spacing archs that form along the width direction of installation casing 22, a plurality of spacing archs are laid along the length direction interval of installation casing 22 and are enclosed and close and form the spacing groove, swinging member 25 still includes along swinging member 25 the thickness direction set up and correspond the spacing hole of laying with the spacing groove and lay the stopper in the spacing hole, the spacing end of stopper stretches into the spacing inslot and is used for in swinging member 25 swing in-process with the swing scope of limiting swinging member 25 with spacing protruding butt. Specifically, in the swing process of the swing piece 25, the limit block swings synchronously, and the limit end of the limit block extends into the limit groove and is abutted and limited by the limit protrusion, so that the limit end can only swing in the limit groove, the swing range of the swing piece 25 is correspondingly limited, the situation that the push portion 252 is separated from the push area of the ratchet due to the overlarge swing range of the swing piece 25 and is possibly blocked due to interference of the ratchet is avoided.

As shown in fig. 4, in the present embodiment, a sensor electrically connected to the controller and used for transmitting a feedback signal to the controller after abutting against the limiting portion 253 is disposed on the limiting column 222. Specifically, when the control circuit board is powered on the first communicating member 33 and disconnected from the second communicating member 34, so that the swinging member 25 swings towards the first end of the memory alloy wire 32, the limiting portion 253 swings towards the limiting post 222 located at the second end of the memory alloy wire 32 until the limiting portion 253 abuts against the limiting post 222, the sensor transmits a feedback signal to the controller, which indicates that the swinging member 25 swings in place, at this time, the controller controls the control circuit board to be disconnected from the first communicating member 33 and powered on the second communicating member 34, so that the swinging member 25 swings towards the second end of the memory alloy wire 32, correspondingly, the limiting portion 253 swings towards the limiting post 222 located at the first end of the memory alloy wire 32, and until the limiting portion 253 abuts against the limiting post 222, the sensor transmits a feedback signal to the controller, which indicates that the swinging member 25 swings in place; the swinging range of the swinging piece 25 is limited by the sensor, and the swinging piece 25 is prevented from being damaged due to excessive swinging.

As shown in fig. 4, in the present embodiment, the control assembly 4 further includes a transmission member sleeved on the connection column 221 for contacting the controller and the swinging member 25 respectively to transmit current. Specifically, the current after the first communicating member 33 or the second communicating member 34 and the control circuit board are electrified flows into the controller after sequentially flowing through the memory alloy wire 32, the swinging member 25 and the transmission member, so as to form a complete current loop, and ensure that the memory alloy wire 32 is electrified and thermally deformed. Optionally, the transmission member is a compression spring.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. The utility model provides a drive formula liquid medicine infusion device that resets, a serial communication port, including be used for infusing subassembly (1) in the patient with liquid medicine injection, be used for promoting infusion subassembly (1) in order to carry out liquid medicine infusion to the patient push assembly (2), be used for being connected with push assembly (2) through memory alloy thermal deformation with drive push assembly (2) memory alloy drive assembly (3) of pushing work and with memory alloy drive assembly (3) electric control assembly (4) that are used for controlling memory alloy drive assembly (3) work of being connected, push assembly (2), memory alloy drive assembly (3) and control assembly (4) are integral structure, push assembly (2) including with infusion subassembly (1) can dismantle be connected be used for stretching out to push infusion subassembly (1) in order to carry out liquid medicine infusion to the patient push lead screw (21), drive formula liquid medicine infusion device that resets still including being used for can dismantle with push assembly (2) and be connected so that it promotes to push assembly (2) The screw rod (21) extends out to push and then contracts to reset the resetting component (5).

2. The drive return medical fluid infusion device according to claim 1, wherein the infusion set (1) includes a reservoir for storing the medical fluid detachably connected to the push screw (21) and an infusion member communicating with the reservoir for injecting the medical fluid into the patient.

3. The drive reset type liquid medicine infusion device according to claim 2, wherein the liquid storage part comprises a liquid storage shell and a piston arranged in the liquid storage shell, a square groove is concavely formed in the end surface of the piston facing the push screw rod (21), and a square head in plug fit with the square groove is arranged at the end part of the push screw rod (21) facing the piston.

4. The drive reset type liquid medicine infusion device according to any one of claims 1 to 3, wherein the push assembly (2) comprises a mounting housing (22), a ratchet mechanism (23) rotatably disposed on the mounting housing (22), a screw sleeve (24) fixedly disposed in the ratchet mechanism (23) and sleeved outside the push screw (21), and a swing member (25) rotatably disposed on the mounting housing (22) and disposed corresponding to the ratchet mechanism (23), the swing member (25) is connected to the memory alloy drive assembly (3), and the reset assembly (5) is detachably connected to the ratchet mechanism (23) and the push screw (21), respectively.

5. The drug solution infusion device with drive reset of claim 4, the memory alloy driving assembly (3) comprises guide posts (31) respectively arranged at two opposite ends of the swinging piece (25), a memory alloy wire (32) which is rotatably sleeved on the guide posts (31) and connected with the swinging piece (25) and is heated to contract after being electrified, a first communicating piece (33) which is connected with the first end of the memory alloy wire (32) and is used for being electrically connected with the control assembly (4) so as to enable the first end of the memory alloy wire (32) to be heated to contract and further drive the swinging piece (25) to swing towards the first end of the memory alloy wire (32), and a second communicating piece (34) which is connected with the second end of the memory alloy wire (32) and is used for being electrically connected with the control assembly (4) so as to enable the second end of the memory alloy wire (32) to be heated to contract and further drive the swinging piece (25) to swing towards the second end of the memory alloy wire (32).

6. The drug solution infusion device with drive reset as defined in claim 5, wherein the control assembly (4) comprises a control circuit board and a controller electrically connected to the control circuit board, the control circuit board being in contact with the first communicating member (33) and the second communicating member (34), respectively.

7. The drive reset type liquid medicine infusion device according to claim 6, wherein the mounting housing (22) comprises a connecting column (221) arranged along the height direction of the mounting housing (22), the swinging member (25) is rotatably sleeved on the connecting column (221), the swinging member (25) comprises a crimping portion (251) arranged between the two guide columns (31) and crimped with the memory alloy wire (32) for swinging along with the heat shrinkage of the memory alloy wire (32), and a pushing portion (252) arranged corresponding to the ratchet mechanism (23) for pushing the ratchet mechanism (23) to rotate along with the swinging of the crimping portion (251).

8. The drive reset type medical fluid infusion device according to claim 7, wherein the end of the mounting housing (22) away from the crimping portion (251) is provided with a plurality of limiting posts (222) arranged along the height direction of the mounting housing (22), the plurality of limiting posts (222) are arranged at intervals along the length direction of the mounting housing (22) to form a limiting gap, and the end of the swinging member (25) away from the crimping portion (251) is provided with a limiting portion (253) formed by extending along the length direction of the swinging member (25) and extending into the limiting gap for abutting against the limiting posts (222) during the swinging of the swinging member (25) to limit the swinging range of the swinging member (25).

9. The drug solution infusion device with the reset function according to claim 4, wherein the ratchet mechanism (23) comprises a rotating shaft (231) rotatably disposed on the mounting housing (22) and fixedly sleeved outside the screw rod sleeve (24), a ratchet wheel (232) sleeved outside the rotating shaft (231) in a unidirectional rotating manner, and a plurality of ratchet teeth sequentially arranged along the circumferential direction of the ratchet wheel (232), wherein the rotating shaft (231) is detachably connected with the reset assembly (5).

10. The drug solution infusion device with the reset function according to claim 9, wherein the reset assembly (5) comprises a reset motor (51), a connecting sleeve (52) which is arranged on an output shaft of the reset motor (51) and is detachably connected with the rotating shaft (231) in a driving way, and a movable sleeve (53) which is detachably connected with the push screw rod (21) and is used for preventing the push screw rod (21) from rotating in the circumferential direction.

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