WO2024011696A1

WO2024011696A1 - Detachable drug liquid infusion device

Info

Publication number: WO2024011696A1
Application number: PCT/CN2022/111047
Authority: WO
Inventors: 刘祥华; 谭益民; 刘师宏; 章静; 杨超; 郑湘明; 陈一; 刘超
Original assignee: 湖南千山医疗器械有限公司
Priority date: 2022-07-14
Filing date: 2022-08-09
Publication date: 2024-01-18
Also published as: CN115089808A

Abstract

A detachable drug liquid infusion device, comprising a first case (1) and a second case (2). The first case (1) contains an infusion assembly (3) used for infusing a drug liquid into the body of a patient and an execution assembly (4) connected to the infusion assembly (3) and used for driving the infusion assembly (3) to infuse the drug liquid. The second case (2) contains a memory alloy driving assembly (5) detachably connected to the execution assembly (4) and a control assembly (6) electrically connected to the memory alloy driving assembly (5) and used for controlling the work of the memory alloy driving assembly (5). The first case (1) and the second case (2) are detachably assembled. The second case (2) as well as the relatively expensive control assembly (6) and memory alloy driving assembly (5) in the second case (2) can be recycled, such that the cost of repeated use is greatly reduced for the patient. In addition, a driving power is provided in the mode of heating memory alloy to deform, helping to miniaturize the device. Therefore, the device is easy to carry and use, has great applicability, and is suitable to widely popularize and use.

Description

Detachable medicinal liquid infusion device

Technical field

The present invention relates to the technical field of medical equipment, and in particular, to a detachable medicinal liquid infusion device.

Background technique

During the patient's treatment, it is a common treatment method to inject medicinal liquid into the patient's body through a medicinal liquid infusion device. The insulin pump, a medicinal liquid infusion device, can simulate the physiological insulin secretion pattern to adjust the insulin level at different times. The characteristics of physiological secretion are adjusted to the patient. Therefore, the insulin pump is a more humane medicine infusion device that is more in line with the physiological insulin secretion pattern.

Existing insulin pumps usually have a control part, a driving part, an execution part and an infusion part. The control part controls the work of the driving part to drive the execution part to work, and then controls the infusion part to infuse insulin into the patient's body. According to medical According to the relevant regulations of the equipment, after the infusion part completes the infusion operation, the infusion part needs to be disposed of in an appropriate manner. However, in order to work stably and reliably during use, the insulin pump is designed with an integral structure, which results in Insulin pumps are troublesome to disassemble and assemble, making existing insulin pumps equivalent to disposable items. They can only be discarded after use, which greatly increases the cost of use for patients. An insulin pump costs at least 40,000 to 50,000 yuan, and even more than 10,000 yuan. Ten thousand, and its cost is mainly reflected in the control part and execution part. It is expensive to use multiple times and is not accepted by patients with type 2 diabetes and gestational diabetes. Moreover, the driving part of most insulin pumps uses motors, encoders, and reduction gearboxes. , catheters and other components, the insulin pump is large in size, has fewer options for infusion, is inconvenient to carry, has poor concealment, and is easily subject to strange looks from the surroundings.

Contents of the invention

The invention provides a detachable medicinal liquid infusion device to solve the technical problems that the insulin pump can only be discarded after use by the patient, is expensive to use for a long time, is large in size, and is inconvenient to carry and use.

According to one aspect of the present invention, a detachable medical liquid infusion device is provided, including a first housing and a second housing. The first housing includes an infusion component for injecting medical liquid into a patient's body; An execution component is connected to the infusion component and used to drive the infusion component to infuse the medicinal solution. The second housing includes an execution component that is detachably connected to the execution component and is used to drive the execution component to work through thermal deformation of the memory alloy to drive the infusion component to inject. There is a memory alloy driving component filled with chemical liquid and a control component electrically connected to the memory alloy driving component for controlling the operation of the memory alloy driving component. The first shell and the second shell are detachably assembled and connected.

As a further improvement of the above technical solution:

Further, the execution component includes an installation housing arranged in the first housing, a ratchet mechanism rotatably arranged on the installation housing, a screw sleeve fixedly arranged in the ratchet mechanism, a screw sleeve arranged in the screw sleeve and connected with the output. Note that the assembly is fixedly connected to the execution screw and the swinging piece is rotatably arranged on the installation shell and arranged corresponding to the ratchet mechanism. The screw sleeve is threadedly connected to the execution screw, and the swinging piece is detachably connected to the memory alloy drive assembly.

Further, the memory alloy driving assembly includes guide posts respectively arranged at opposite ends of the swing member, memory alloy wires rotatably sleeved on the guide posts and detachably connected to the swing member for thermal contraction after being energized, and memory alloy wires. The first end of the wire is connected to the control component to electrically connect the first end of the memory alloy wire to cause the first end of the memory alloy wire to shrink when heated and thereby drive the swinging member to swing toward the first end of the memory alloy wire. The second communication piece connected at both ends is used to electrically connect with the control component to cause the second end of the memory alloy wire to shrink when heated and thereby drive the swinging member to swing toward the second end of the memory alloy wire.

Further, the end of the swinging member facing the memory alloy driving assembly is provided with a curved and elastically deformable extrusion part. The extrusion part is arranged between the two guide columns, and the extrusion part is bent to accommodate the memory alloy wire. And the extrusion cavity uses the memory alloy wire to shrink when heated to make the extrusion part swing.

Further, the installation housing includes a connecting column arranged along the height direction of the installation housing, the swinging member is rotatably sleeved on the connecting column, and the swinging member also includes a swinging member arranged corresponding to the ratchet mechanism for swinging along with the swing of the extrusion part. The pushing part that drives the ratchet mechanism to rotate step by step.

Further, the end of the mounting housing away from the extrusion part is provided with a plurality of limiting posts arranged along the height direction of the mounting housing. The plurality of limiting posts are spaced apart along the length direction of the mounting housing and form limiting gaps. The end of the swinging member away from the extrusion part is provided with a pin extending along the length direction of the swinging member and extending into the limiting gap for abutting with the limiting post during the swinging process of the swinging member to limit the swing range of the swinging member. Limiting part.

Further, the control component includes a control circuit board and a controller electrically connected to the control circuit board. The control circuit board is in contact with the first communication member and the second communication member respectively.

Furthermore, a sensor electrically connected to the controller is arranged on the limiting column for transmitting a feedback signal to the controller after contacting the limiting part.

Further, the control assembly also includes a transmission member for transmitting current that is sleeved on the connecting column and in contact with the controller and the swinging member respectively.

Further, the first housing and the second housing are detachably assembled and connected on the left and right sides; or the first housing and the second housing are detachably and assembled on the upper and lower sides.

The invention has the following beneficial effects:

When the detachable medicinal liquid infusion device of the present invention needs to infuse insulin or other medicinal liquid into the patient's body, the first shell and the second shell are first assembled and applied to the patient's infusion site. The component controls the memory alloy drive component to work after being energized, so that the memory alloy in the memory alloy drive component is heated and deformed after being energized to drive the component to work, thereby driving the infusion component to infuse the medical solution into the patient's body, thereby realizing the patient's medical solution infusion treatment , after the infusion of the medicinal solution is completed, the first shell and the second shell are disassembled, the first shell is discarded in a suitable way, and the second shell is recycled. The patient only needs to spend a relatively small cost to purchase a new one. The first shell can be used normally by being assembled with the recycled second shell. It is economical and environmentally friendly, and is conducive to resource recycling. The used first shell should be discarded in an appropriate disposal method. This solution is connected by assembly. The first housing and the second housing, as well as the detachably connected actuator components and memory alloy driving components, realize the recycling of the second housing and the more expensive control components and memory alloy driving components in the second housing, which greatly reduces the cost. The cost of multiple uses for patients is low, and the driving power is provided by using memory alloy to be heated and deformed. Compared with existing driving components, there is no need to use motors, reducers and other devices, which is conducive to the miniaturization of the device and is easy to carry. , and there are more infusion sites to choose from, such as the abdomen, limbs, etc., which can reduce the possibility of complications caused by always infusing the same site, while further reducing the production cost of the device, while meeting the needs of patients with type 1 diabetes. , easy to popularize to patients with type 2 diabetes and gestational diabetes, highly practical, and suitable for widespread promotion and application.

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

Description of drawings

The drawings forming a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached picture:

Figure 1 is a schematic structural diagram of a detachable medicinal liquid infusion device according to a preferred embodiment of the present invention;

Figure 2 is a schematic structural diagram of a detachable medicinal liquid infusion device according to a preferred embodiment of the present invention;

Figure 3 is a schematic structural diagram of a detachable medicinal liquid infusion device according to a preferred embodiment of the present invention;

Figure 4 is an exploded schematic diagram of the execution component of the detachable medicinal liquid infusion device according to the preferred embodiment of the present invention;

Figure 5 is a partially structural exploded view of the execution component of the detachable medicinal liquid infusion device according to the preferred embodiment of the present invention. illustration:

1. First housing; 2. Second housing; 3. Infusion component; 4. Execution component; 41. Installation housing; 411. Connecting column; 412. Limiting column; 413. Sensor; 42. Ratchet mechanism ; 43. Screw sleeve; 44. Execution screw; 45. Swinging member; 451. Extrusion part; 452. Pushing part; 453. Limiting part; 5. Memory alloy drive component; 51. Guide column; 52. Memory Alloy wire; 53, first communication member; 54, second communication member; 6, control component; 61, control circuit board; 62, controller; 63, transmission member.

Detailed ways

The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in a variety of different ways as defined and covered below.

Figure 1 is a schematic structural diagram of a detachable medicinal liquid infusion device according to a preferred embodiment of the present invention; Figure 2 is a schematic structural diagram of a detachable medicinal liquid infusion device according to a preferred embodiment of the present invention; Figure 3 is a preferred embodiment of the present invention. The structural schematic diagram of the detachable medicinal liquid infusion device; Figure 4 is an exploded schematic view of the execution component of the detachable medicinal liquid infusion device according to the preferred embodiment of the present invention; Figure 5 is the detachable medicinal liquid infusion device according to the preferred embodiment of the present invention. An exploded schematic diagram of the partial structure of the execution component of the liquid infusion device.

As shown in Figures 1 to 3, the detachable medicinal liquid infusion device of this embodiment includes a first housing 1 and a second housing 2. The first housing 1 contains a device for injecting medicinal liquid into The infusion component 3 in the patient's body and the execution component 4 connected to the infusion component 3 for driving the infusion component 3 to infuse medical solution. The second housing 2 includes an execution component detachably connected to the execution component 4 for passing the memory. The alloy is heated and deformed to drive the execution component 4 to work, thereby driving the infusion component 3 to inject the memory alloy driving component 5 and the control component 6 electrically connected to the memory alloy driving component 5 for controlling the operation of the memory alloy driving component 5, No. The first housing 1 and the second housing 2 are detachably assembled and connected. Specifically, when the detachable medical liquid infusion device of the present invention needs to infuse insulin or other medical liquid into the patient's body, the first shell 1 and the second shell 2 are first assembled and attached to the patient's infusion device. On the part, the control component 6 controls the memory alloy driving component 5 to work after being energized, so that the memory alloy in the memory alloy driving component 5 is heated and deformed after being energized to drive the execution component 4 to work, thereby driving the infusion component 3 to inject the medical solution into the patient's body. , so as to realize the medical liquid infusion treatment of the patient. After the medical liquid infusion is completed, the first shell 1 and the second shell 2 are disassembled. The first shell 1 is discarded in an appropriate manner, and the second shell 2 is disposed of in an appropriate manner. For recycling, the patient only needs to spend a relatively small cost to purchase a new first housing 1 to assemble with the recycled second housing 2 for normal use. It is economical and environmentally friendly, and is conducive to the recycling of resources. The used second housing 1 can be used normally. The first housing 1 is discarded in a suitable way. This solution realizes the disposal of the second housing 2 by assembling and connecting the first housing 1 and the second housing 2 as well as the detachably connected execution component 4 and the memory alloy driving component 5. And the recycling of the relatively expensive control component 6 and memory alloy driving component 5 in the second housing 2 greatly reduces the cost of repeated use by the patient, and the driving power is provided by using the thermal deformation of the memory alloy, which is compared with the current situation. Some driving components do not require the use of motors, reducers and other devices, which is conducive to the miniaturization of the device, easy to carry and use, and more infusion sites can be selected, such as the abdomen, limbs, etc., which can reduce the need for constant infusion. The possibility of complications caused by the same part also further reduces the production cost of the device. While meeting the needs of patients with type 1 diabetes, it is easy to popularize it to patients with type 2 diabetes and gestational diabetes. It is highly practical and suitable for widespread promotion and application.

As shown in FIGS. 4 and 5 , in this embodiment, the execution component 4 includes a mounting housing 41 arranged in the first housing 1 , a ratchet mechanism 42 rotatably arranged on the mounting housing 41 , and a ratchet mechanism 42 fixedly arranged on the mounting housing 41 . The screw sleeve 43 in the ratchet mechanism 42, the execution screw 44 arranged in the screw sleeve 43 and fixedly connected to the infusion assembly 3, and the swing rod rotatably arranged on the installation shell 41 and arranged corresponding to the ratchet mechanism 42 The screw sleeve 43 and the execution screw 44 are threadedly connected, and the swing member 45 is detachably connected to the memory alloy driving assembly 5. Specifically, the memory alloy driving assembly 5 drives the swinging member 45 to swing, so as to drive the ratchet mechanism 42 to rotate step by step, and then drive the screw sleeve 43 to rotate synchronously. Since the execution screw 44 is fixedly connected to the infusion assembly 3, the execution The screw rod 44 is circumferentially fixed relative to the screw rod sleeve 43 and extends axially to push the infusion assembly 3 to inject the medical solution.

As shown in FIGS. 4 and 5 , in this embodiment, the ratchet mechanism 42 includes a rotating shaft rotatably arranged on the mounting housing 41 , a ratchet wheel fixedly sleeved outside the rotating shaft, and a ratchet wheel arranged in sequence along the circumferential direction of the ratchet wheel. There are a plurality of ratchet teeth, and the rotating shaft is provided with a connecting cavity connected to the screw sleeve 43 along the axial direction. Specifically, when the medical solution needs to be infused, the ratchet is pushed by the swinging member 45 to drive the ratchet to rotate step by step. At this time, the ratchet drives the rotating shaft to rotate step by step, and then drives the screw sleeve 43 to rotate step by step. Thereby, the extension and pushing of the execution screw 44 is realized.

As shown in FIGS. 2 and 3 , in this embodiment, the memory alloy driving assembly 5 includes guide posts 51 respectively arranged at opposite ends of the swing member 45 , and is rotatably sleeved on the guide posts 51 and detachable from the swing member 45 . The connected memory alloy wire 52 is used for thermal shrinkage after being energized, and the first end of the memory alloy wire 52 is connected for electrical connection with the control component 6 so that the first end of the memory alloy wire 52 shrinks due to heat and thereby drives the swing member 45 The first communication piece 53 swinging toward the first end of the memory alloy wire 52 and the second end connected to the memory alloy wire 52 are used to electrically connect with the control component 6 so that the second end of the memory alloy wire 52 shrinks due to heat and thereby drives the The swinging member 45 swings toward the second communication member 54 of the second end of the memory alloy wire 52 . Specifically, the control component 6 is connected to the first communication member 53 and disconnected from the second communication member 54 , so that the first end of the memory alloy wire 52 is energized and heated to shrink, thereby driving the swing member 45 toward the first end of the memory alloy wire 52 . The control component 6 is disconnected from the first communication member 53 and connected to the second communication member 54, so that the second end of the memory alloy wire 52 is energized and heated to shrink, thereby driving the swing member 45 toward the second end of the memory alloy wire 52. The end swings and reciprocates in cycles to realize the reciprocating swing of the swing member 45. It should be understood that the specific material of the memory alloy wire 52 is a well-known technology for those skilled in the art, and will not be described in detail here, as long as it can achieve thermal shrinkage after being energized.

As shown in FIG. 3 , in this embodiment, the swing member 45 is provided with a curved and elastically deformable extrusion portion 451 toward the end of the memory alloy driving component 5 . The extrusion portion 451 is arranged between the two guide posts 51 During this time, the extrusion part 451 is bent to form an extrusion cavity for accommodating the memory alloy wire 52 and causing the extrusion part 451 to swing by thermal shrinkage of the memory alloy wire 52 . Specifically, when the first housing 1 and the second housing 2 are assembled, the memory alloy wire 52 is extruded into the extrusion cavity along the assembly direction, causing the extrusion part 451 to undergo a certain elastic deformation to extrusion-connect the memory alloy wire. 52. When the first housing 1 and the second housing 2 are disassembled, since the disassembly direction and the assembly direction are opposite, the memory alloy wire 52 is directly separated from the extrusion part 451 along the disassembly direction, thereby realizing the actuator assembly 4 and the memory alloy drive. The disassembly of the assembly 5 facilitates the disassembly and assembly of the first housing 1 and the second housing 2 . It should be understood that the elastic deformation direction of the extrusion part 451 is arranged at an angle with the swing direction of the extrusion part 451 to avoid elastic deformation of the extrusion part 451 and loosening of the memory alloy wire 52 when the memory alloy wire 52 shrinks due to heat. .

As shown in Figure 4, in this embodiment, the installation housing 41 includes a connecting column 411 arranged along the height direction of the installation housing 41. The swinging member 45 is rotatably sleeved on the connecting column 411. The swinging member 45 also includes a The ratchet mechanism 42 is correspondingly provided with a pushing part 452 for pushing the ratchet mechanism 42 to rotate step by step as the pressing part 451 swings. Specifically, the memory alloy wire 52 repeatedly heats and shrinks toward the first end of the memory alloy wire 52 or toward the second end of the memory alloy wire 52 to drive the extruding part 451 to swing repeatedly, thereby driving the swinging member 45 to swing repeatedly, thereby The pushing part 452 is driven to repeatedly push the ratchet mechanism 42 to achieve stepwise rotation of the ratchet mechanism 42 .

As shown in FIG. 4 , in this embodiment, the end of the mounting housing 41 away from the extrusion part 451 is provided with a plurality of limiting posts 412 arranged along the height direction of the mounting housing 41 . The plurality of limiting posts 412 are arranged along the mounting direction. The housing 41 is arranged at intervals in the length direction to form a limiting gap. The end of the swinging member 45 away from the extrusion part 451 is provided with a hole extending along the length direction of the swinging member 45 and extending into the limiting gap for use in the swinging member 45 . The limiting portion 453 contacts the limiting post 412 during the swing process of the swing member 45 to limit the swing range of the swing member 45 . Specifically, during the swing of the swing member 45, the limiting portion 453 swings synchronously. Since the limiting portion 453 extends into the limiting gap and is abutted and limited by the limiting column 412, it can only swing within the limiting gap. The swing range of the swing member 45 is correspondingly limited, so as to avoid the swing range of the swing member 45 being too large and causing the pushing part 452 to break away from the pushing area of the ratchet, which may then be hindered and interfered by the ratchet and become stuck, thereby ensuring the smooth movement of the swing member 45 Stable and reliable.

As shown in FIG. 4 , in this embodiment, the side wall of the mounting housing 41 is provided with a plurality of limiting protrusions extending along the width direction of the mounting housing 41 . The plurality of limiting protrusions extend along the width direction of the mounting housing 41 . The swing member 45 is spaced apart in the length direction to form a limit slot. The swing member 45 also includes a limit hole opened along the thickness direction of the swing member 45 and arranged corresponding to the limit slot, and a limit block arranged in the limit hole. The limiting end of the block extends into the limiting groove and is used to abut the limiting protrusion during the swinging process of the swinging member 45 to limit the swinging range of the swinging member 45 . Specifically, during the swinging process of the swinging member 45, the limiting block swings synchronously. Since the limiting end of the limiting block extends into the limiting groove and is abutted and limited by the limiting protrusion, it can only move in the limiting groove. Swinging causes the swinging range of the swinging member 45 to be correspondingly limited, to prevent the swinging range of the swinging member 45 from being too large and causing the pushing part 452 to leave the pushing area of the ratchet, which may be hindered and interfered by the ratchet and become stuck.

As shown in Figure 3, in this embodiment, the control component 6 includes a control circuit board 61 and a controller 62 electrically connected to the control circuit board 61. The control circuit board 61 is in contact with the first communication member 53 and the second communication member 54 respectively. . Specifically, the controller 62 controls the control circuit board 61 to realize that when the first communication member 53 and the control circuit board 61 are powered on, the second communication member 54 is disconnected from the control circuit board 61 and drives the swing member 45 toward the memory alloy wire 52 or when the second connecting member 54 is energized with the control circuit board 61, the first connecting member 53 is disconnected from the control circuit board 61, driving the swinging member 45 to swing toward the second end of the memory alloy wire 52. It should be understood that the specific structure of the control circuit board 61 is a well-known technology for those skilled in the art, and will not be described in detail here. Optionally, the controller 62 is a PLC controller 62. It should be understood that the specific structure of the PLC controller 62 is a well-known technology for those skilled in the art, and will not be described in detail here.

As shown in FIG. 4 , in this embodiment, the limiting column 412 is provided with a sensor 413 electrically connected to the controller 62 for contacting the limiting portion 453 and then transmitting a feedback signal to the controller 62 . Specifically, when the control circuit board 61 is energized with the first communication member 53 and disconnected from the second communication member 54 so that the swing member 45 swings toward the first end of the memory alloy wire 52, the limiting portion 453 moves toward the memory alloy wire 52. The limiting column 412 at the second end of 52 swings until the limiting portion 453 contacts the limiting column 412. The sensor 413 transmits a feedback signal to the controller 62, indicating that the swinging member 45 has swung in place. At this time, the controller 62 The control circuit board 61 is disconnected from the first communication member 53 and energized with the second communication member 54 , so that the swing member 45 swings toward the second end of the memory alloy wire 52 , correspondingly, the limiting portion 453 moves toward the memory alloy wire 52 The limiting column 412 at the first end swings until the limiting portion 453 contacts the limiting column 412. The sensor 413 transmits a feedback signal to the controller 62, indicating that the swinging member 45 has swung in place; the sensor 413 is used to limit the swing. The swing range of the swing member 45 is to prevent the swing member 45 from being stuck or damaged due to excessive swing.

As shown in FIG. 4 , in this embodiment, the control assembly 6 also includes a transmission member 63 for transmitting current that is sleeved on the connecting column 411 and in contact with the controller 62 and the swing member 45 respectively. Specifically, the current after the first communication member 53 or the second communication member 54 is energized with the control circuit board 61 sequentially flows through the memory alloy wire 52, the swing member 45 and the transmission member 63 and then flows into the controller 62, forming a complete current. loop to ensure that the memory alloy wire 52 is energized and deformed by heat. Optionally, the transmission member 63 is a compression spring.

In this embodiment, the first housing 1 and the second housing 2 are detachably assembled and connected up and down. Optionally, the end surface of the first housing 1 facing away from the second housing 2 is provided with an application plate for application on the patient's body surface.

In another embodiment, the first housing 1 and the second housing 2 are detachably assembled and connected on the left and right sides. Optionally, an application plate for applying on the patient's body surface is provided on the same end surface of the first housing 1 and the second housing 2 .

In this embodiment, the infusion assembly 3 includes a liquid storage part fixedly connected to the execution screw 44 for storing medical solution and an infusion part connected with the liquid storage part for injecting the medical solution into the patient's body. Specifically, the execution screw 44 pushes the medical solution in the liquid storage part into the infusion part, and then infuses the medical solution into the patient's body through the infusion part, thereby realizing the medical solution infusion. Optionally, the infusion part includes a needle tube, a rubber tube, and a needle control mechanism that drives the needle insertion and withdrawal of the needle tube. The needle of the needle tube is preferably a stainless steel needle to reduce possible bacterial infections. The needle tube is connected to the liquid storage part through a hose. The liquid storage part supplies liquid to the needle tube; the rubber tube is sleeved on the outside of the needle tube, and the needle tube can move relative to the rubber tube. When the patient needs to be infused, the needle tube control mechanism controls the needle of the needle tube to extend out of the rubber tube, completing After infusion, the needle tube control mechanism controls the needle on the needle tube to be retracted into the rubber tube, reducing the patient's pain caused by the long-term presence of the needle in the body. Optionally, a patch is provided on the side of the base plate facing the patient's body, and a needle hole is provided on the patch for the needle on the syringe to pass through and infuse the patient with medicine. This patch method replaces the long catheter. The use of a long catheter avoids the friction between the catheter and the user's body when using a long catheter, and the long catheter may be hung on other objects, which may cause discomfort to the patient. Optionally, the needle tube control mechanism includes a mounting frame, a slider assembly, a slope stop assembly and an elastic assembly. The mounting frame is installed inside the housing. The elastic assembly includes screws. The screws are installed at one end of the mounting frame. A torsion spring is installed on the outside of the screws. The outside of the herringbone arm is rotatably connected to the 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 includes a first connecting rod that is rotatably connected to the outside of the screw, and a first connecting rod that is rotatably connected to the outside of the screw. The connecting rod is rotatably connected to a second connecting rod. The outer end of the second connecting rod is rotatably connected to the sliding part on the slider assembly. The sliding assembly includes a first slider, a second slider and a slide rail. The outer end of the second connecting rod is rotatably connected to the sliding part. The end of the connecting rod is rotatably connected to the first slide block, and the second connecting rod can drive the first slide block to slide on the slide rail of the slide block assembly. There is a stopper. The stopper is located between the first slider and the second slider. The stopper is divided into two usage states. One is when the slope stopper assembly is pulled outward, the stopper moves from the first slider to the second slider. The two slide blocks are separated. At this time, the torsion spring rotates and resets, and during the reset process, the herringbone arm is driven to extend to push the first slide block and the second slide block to move on the slide rail; the other is when the slope blocker When the block assembly is pressed, the stopper pushes the first slider to reset, so that the contact position between the stopper and the first slider is an inclined plane, which facilitates the reset of the first slider. When the stopper pushes the first slider to fully reset, , the stopper is located between the first slider and the second slider to separate the two. At this time, the torsion spring is twisted, and the torsion spring has a tendency to reset and push the first slider to move, which is the next time the first slider is pushed. The first slide block is provided with a first conductive groove, the second slide block is provided with a second conductive groove, the second conductive groove is used to accommodate the hose, and the second slide block is provided with an adapter cavity , the hose is provided with a positioning part protruding from the hose, the positioning part is adapted to the adapting cavity, and the needle tube penetrates into the hose through the positioning part. Preferably, after the infusion is completed, the rubber tube remains in the reserved tube on the patient's skin, and the needle tube is retracted into the housing to avoid complications caused by the needle remaining in the patient's body. Specifically, the second slider is away from the first There is a blocking hole at one end of the slider, and a corresponding spring thimble is provided on the front cover. After the second slider slides to a certain position, the spring thimble pops out and is inserted into the blocking hole to fix the second slider so that the rubber hose will not It is driven to retract, and the first slide block resets and retracts under the contraction of the herringbone arm, and the needle tube is finally retracted into the hose. During the next infusion, the first slide block is pushed to move through the operation of the button piece. Just push the needle tube out.

In this embodiment, the liquid storage component includes a liquid storage housing and a piston arranged in the liquid storage housing. The end surface of the piston facing the execution screw 44 is recessed with a connection groove fixedly connected to the execution screw 44 . Specifically, the execution screw 44 is fixedly connected through the connecting groove, so that when the execution component 4 drives the execution screw 44 to extend and push, the medical solution in the liquid storage housing is introduced into the infusion piece.

The above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

A detachable medical liquid infusion device, characterized in that it includes a first shell (1) and a second shell (2). The first shell (1) contains a device for injecting medical liquid into a patient. The infusion component (3) in the body and the execution component (4) connected to the infusion component (3) for driving the infusion component (3) to infuse the medical solution. The second housing (2) includes the execution component and the infusion component (3). (4) A detachably connected memory alloy driving assembly (5) used to drive the execution assembly (4) to work through the thermal deformation of the memory alloy to drive the infusion assembly (3) to infuse the medical solution, and the memory alloy driving assembly (5) ) is an electrically connected control component (6) used to control the operation of the memory alloy driving component (5). The first housing (1) and the second housing (2) are detachably assembled and connected.
The detachable medicinal liquid infusion device according to claim 1, characterized in that the execution component (4) includes an installation housing (41) arranged in the first housing (1), and is rotatably arranged in the installation housing (41). The ratchet mechanism (42) on the housing (41), the screw sleeve (43) fixedly arranged in the ratchet mechanism (42), the screw sleeve (43) arranged in the screw sleeve (43) and fixedly connected to the infusion assembly (3) The execution screw (44) and the swinging member (45) are rotatably arranged on the installation housing (41) and arranged correspondingly to the ratchet mechanism (42). The screw sleeve (43) and the execution screw (44) are threadedly connected. , the swing piece (45) is detachably connected to the memory alloy driving assembly (5).
The detachable medicinal liquid infusion device according to claim 2, characterized in that the memory alloy driving assembly (5) includes guide posts (51) respectively arranged at opposite ends of the swing member (45), and is rotatably sleeved. A memory alloy wire (52) on the guide column (51) and detachably connected to the swing member (45) for thermal shrinkage after being energized, and a memory alloy wire (52) connected to the first end of the memory alloy wire (52) for connecting to the control component. (6) The first connecting piece (53) that is electrically connected to cause the first end of the memory alloy wire (52) to shrink when heated and thereby drive the swinging member (45) to swing toward the first end of the memory alloy wire (52), and the memory alloy The second end of the wire (52) is used to electrically connect with the control component (6) so that the second end of the memory alloy wire (52) shrinks due to heat and then drives the swinging member (45) toward the third end of the memory alloy wire (52). The second connecting piece (54) has two swinging ends.
The detachable medical liquid infusion device according to claim 3, characterized in that the swing member (45) is provided with a curved and elastically deformable extrusion portion (5) toward the end of the memory alloy driving assembly (5). 451), the extrusion part (451) is arranged between the two guide columns (51), the extrusion part (451) is bent to accommodate the memory alloy wire (52), and the memory alloy wire (52) shrinks due to heat. The extrusion cavity of the extrusion part (451) swings.
The detachable medicinal liquid infusion device according to claim 4, characterized in that the installation housing (41) includes a connecting column (411) arranged along the height direction of the installation housing (41), and the swing member (45) It is rotatably sleeved on the connecting column (411). The swing member (45) also includes a step-type stepper arranged corresponding to the ratchet mechanism (42) and used to push the ratchet mechanism (42) along with the swing of the extrusion part (451). Rotating pusher (452).
The detachable medicinal liquid infusion device according to claim 5, characterized in that, the end of the installation housing (41) away from the extrusion part (451) is provided with an end arranged along the height direction of the installation housing (41). A plurality of limiting posts (412) are spaced apart along the length direction of the installation housing (41) to form a limiting gap. The end of the swinging member (45) away from the extrusion part (451) There is a hole extending along the length direction of the swinging member (45) and extending into the limiting gap for abutting the limiting column (412) during the swinging process of the swinging member (45) to limit the swinging member (45). The limiter of the swing range (453).
The detachable medicinal liquid infusion device according to claim 6, characterized in that the control component (6) includes a control circuit board (61) and a controller (62) electrically connected to the control circuit board (61). The circuit board (61) is in contact with the first communication member (53) and the second communication member (54) respectively.
The detachable medicinal liquid infusion device according to claim 7, characterized in that the limiting column (412) is provided with a back-up device electrically connected to the controller (62) for contacting the limiting portion (453). Feedback signals are transmitted to sensors (413) within the controller (62).
The detachable medicinal liquid infusion device according to claim 7, characterized in that the control assembly (6) also includes a control assembly (6) that is sleeved on the connecting column (411) and connected with the controller (62) and the swinging member (45) respectively. Contact transmission element (63) for transmitting electric current.
The detachable medicinal liquid infusion device according to claim 1, characterized in that the first housing (1) and the second housing (2) are detachably assembled and connected on the left and right; or

The first housing (1) and the second housing (2) are detachably assembled and connected up and down.