CN219071573U - Patch type medicine infusion device - Google Patents

Abstract

The utility model discloses a patch type drug infusion device, which comprises: a cartridge for containing the medicament, the cartridge having a piston and a screw disposed therein; the driving wheel is connected with the screw rod and drives the piston to advance by rotating the driving screw rod; an infusion needle for infusing a drug subcutaneously; the three-way column is communicated with the medicine injection unit, the medicine storage cylinder and the infusion needle, wherein the three-way column is communicated with the medicine storage cylinder in a sealing way through a pipeline; and an adhesive patch for adhering the infusion device to a skin surface. The three-way column is communicated with the medicine storage cylinder in a sealing way through the pipeline, so that the three-way column can be flexibly arranged at the position of the medicine infusion device, and the flexibility of the internal design of the medicine infusion device is improved.

Description

Patch type medicine infusion device

Technical Field

The utility model mainly relates to the field of medical instruments, in particular to a patch type drug infusion device.

Background

The pancreas in the body of a normal person can automatically monitor the glucose content in the blood of the person and automatically secrete the required insulin/glucagon. However, the pancreas of the diabetic patient has abnormal functions and cannot normally secrete insulin required by the human body. Diabetes is a metabolic disease caused by abnormal pancreatic function of a human body, and diabetes is a life-long disease. At present, the medical technology cannot radically cure diabetes, and the occurrence and development of diabetes and complications thereof can only be controlled by stabilizing blood sugar.

The drug infusion device is a medical instrument device which can achieve the aim of treating diseases by continuously injecting drugs into a patient. The drug infusion device is widely used for treating diabetes, and insulin is continuously infused into the subcutaneous of a patient according to the dosage required by the human body, so that the secretion function of pancreas is simulated, and the blood sugar of the patient is kept stable. The drug fluid is usually stored inside the infusion pump body, and the existing drug infusion device usually sticks the pump body to the patient body directly through a medical adhesive tape, and the patient operates a remote device to infuse.

In order to realize the filling and the infusion of medicine, be provided with the tee bend post in the medicine device, realize with the injection unit, the intercommunication of infusion needle and storage cartridge case, the tee bend post in current medicine infusion device with the injection unit, the equal direct sealing intercommunication of infusion needle and storage cartridge case, this leads to the tee bend post to only set up near the position of piston when being close to not infusing medicine, has reduced the flexibility ratio of the inside design of medicine infusion device, can't satisfy the diversified design demand of medicine infusion device.

Accordingly, there is a need in the art for a patch-type drug infusion device with high flexibility in the internal design.

Disclosure of Invention

The utility model discloses a patch type drug infusion device, wherein a three-way column in the drug infusion device is communicated with a drug storage cylinder in a sealing way through a pipeline, so that the three-way column can be flexibly arranged at the position of the drug infusion device, and the flexibility of the design inside the drug infusion device is improved.

The utility model discloses a patch type drug infusion device, which comprises: a cartridge for containing the medicament, the cartridge having a piston and a screw disposed therein; the driving wheel is connected with the screw rod and drives the piston to advance by rotating the driving screw rod; an infusion needle for infusing a drug subcutaneously; the three-way column is communicated with the medicine injection unit, the medicine storage cylinder and the infusion needle, wherein the three-way column is communicated with the medicine storage cylinder in a sealing way through a pipeline; and an adhesive patch for adhering the infusion device to a skin surface.

According to one aspect of the utility model, the tubing is arranged outside the cartridge.

According to one aspect of the utility model, the drug infusion device further comprises a main frame supporting the tubing.

According to one aspect of the utility model, the main frame is further provided with at least one main frame engaging portion for fixing the pipeline.

According to one aspect of the utility model, the tubing is rigid tubing with two ends in sealed communication with the three-way column and the cartridge through elastomeric seals.

According to one aspect of the utility model, the tubing is flexible tubing having two ends in sealing communication with the three-way post and the cartridge through an interference fit.

According to one aspect of the utility model, the tubing is in sealed communication with the cartridge through a transition member.

According to one aspect of the utility model, the transition member is integrally formed with the cartridge.

According to one aspect of the utility model, the transition member is in sealing communication with the cartridge.

According to one aspect of the utility model, the tubing is disposed in the cartridge.

According to one aspect of the utility model, one end of the pipeline is communicated with the three-way column, and the other end of the pipeline is embedded into the piston.

According to one aspect of the utility model, the pipeline is a rigid pipeline, and two ends of the pipeline are communicated with the tee column and the piston in a sealing way through elastic sealing elements.

According to one aspect of the utility model, the pipeline is a telescopic hose, and two ends of the pipeline are communicated with the tee column and the piston in a sealing way through interference fit.

According to one aspect of the utility model, the three-way column is in indirect sealing communication with the drug injection unit via an external conduit.

According to one aspect of the utility model, the three-way post is in indirect sealed communication with the infusion needle via an external conduit.

According to one aspect of the utility model, the adhesive patch further comprises an adhesive tape and release paper, and the surface of the adhesive tape is further provided with dense ventilation holes.

According to one aspect of the utility model, an infusion device includes an infusion structure and a control structure, a cartridge, a drive wheel, an infusion needle and a three-way post are disposed on the infusion structure.

According to one aspect of the utility model, the infusion structure and the control structure are split structures, and the control structure can be reused.

According to one aspect of the utility model, the infusion structure and the control structure are a unitary structure that is discarded entirely after use.

According to one aspect of the utility model, the infusion structure and the control structure are electrically connected by a plurality of electrical contacts.

Compared with the prior art, the technical scheme of the utility model has the following advantages:

in the patch type drug infusion device disclosed by the utility model, the three-way column in the drug infusion device is communicated with the drug storage cylinder in a sealing way through the pipeline, so that the three-way column can be flexibly arranged at the position of the drug infusion device, and the flexibility and diversity of the design inside the drug infusion device are increased.

Further, the pipeline can be a rigid pipeline, is arranged on the outer side of the medicine storage cylinder and is supported by the main frame, and the pipeline is fixed through the clamping part of the main frame, so that stable sealing communication between the three-way column and the medicine storage cylinder is ensured.

Further, the pipeline can be communicated with the storage cylinder in a sealing way through the transition part, so that poor sealing communication caused by direct bending of the pipeline and the sealing communication of the storage cylinder is avoided.

Further, the pipeline can be arranged in the medicine storage cylinder, so that the internal space of the medicine infusion device can be further utilized, the flexibility of the design of the internal space is increased, and the volume of the medicine infusion device is reduced.

Furthermore, the type of the pipeline, such as a rigid pipeline or a flexible pipeline or a telescopic pipeline, and the arrangement position of the pipeline, such as the outer side or the inner side of the medicine storage cylinder, can be flexibly selected, so that the requirement of the internal design diversification is further met.

Further, the tee column is also in indirect sealing communication with the infusion needle through an external pipeline in a communication mode with the drug injection unit, so that the flexibility of the internal design of the drug infusion device is further improved.

Further, the adhesive patch can further comprise adhesive tape and release paper, and the surface of the adhesive tape is provided with dense ventilation holes which are uniformly arranged, so that the adhesive tape has ventilation property, can help the water vapor and sweat secreted by the skin at the joint of a patient to be discharged, and avoids the water vapor and sweat from soaking the skin, so that the skin of the patient is wrinkled.

Drawings

FIGS. 1 a-1 b are top views of drug infusion systems according to two different embodiments of the present utility model;

FIGS. 2 a-2 b are schematic perspective views of a control structure according to one embodiment of the present utility model;

FIG. 3a is a schematic perspective view of an infusion structure according to one embodiment of the present utility model;

FIG. 3b is a side view of a control structure and infusion structure assembled with one another in accordance with one embodiment of the present utility model;

FIG. 4a is a schematic perspective view showing the internal structure of an infusion structure according to the prior art;

FIG. 4b is a schematic perspective view of the internal structure of an infusion structure according to one embodiment of the present utility model;

FIG. 4c is a schematic illustration of a cartridge and transition piece of an infusion structure according to one embodiment of the present utility model;

fig. 4d and 4e are schematic perspective views of the internal structure of an infusion structure according to various embodiments of the present utility model, respectively.

Detailed Description

As described above, the three-way column and the drug injection unit in the existing drug infusion device are directly communicated with the infusion needle and the drug storage cartridge, which results in that the three-way column can only be arranged near the position of the piston when not injecting the drug, thereby reducing the flexibility of the internal design of the drug infusion device and failing to meet the diversified design requirements of the drug infusion device.

In order to solve the problem, the utility model provides the patch type drug infusion device, and the three-way column in the drug infusion device is communicated with the drug storage cylinder in a sealing way through the pipeline, so that the three-way column can be flexibly arranged at the position of the drug infusion device, and the flexibility of the design inside the drug infusion device is increased.

Various exemplary embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. It should be understood that the relative arrangement of parts and steps, numerical expressions and numerical values set forth in these embodiments should not be construed as limiting the scope of the present utility model unless it is specifically stated otherwise.

Furthermore, it should be understood that the dimensions of the various elements shown in the figures are not necessarily drawn to actual scale, e.g., the thickness, width, length, or distance of some elements may be exaggerated relative to other structures for ease of description.

The following description of the exemplary embodiment(s) is merely illustrative, and is in no way intended to limit the utility model, its application, or uses. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail herein, but where applicable, should be considered part of the present specification.

It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined or illustrated in one figure, no further discussion thereof will be necessary in the following figure description.

Fig. 1 a-1 b are top views of drug infusion devices according to two different embodiments of the present utility model.

The patch type drug infusion device of the embodiment of the utility model comprises: a control structure 100, an infusion structure 110, and an adhesive patch 120, wherein the adhesive patch 120 may be disposed on the control structure 100 and/or the infusion structure 110, for example. These structures will be described separately below. In other embodiments of the present utility model, the patch drug infusion device may also include additional components, without limitation.

The patch type drug infusion device refers to an infusion device that does not contain a long catheter, and is integrally stuck to the skin surface of the user by the same patch 120, and drug is infused directly from the cartridge 131 to the subcutaneous side along the infusion needle by the infusion needle unit 121 in the device.

In the embodiment of the present utility model, the control structure 100 and the infusion structure 110 are of a split design, and are connected or directly clamped and electrically connected as a whole through a waterproof plug. The control structure 100 and the infusion structure 110 may improve the reliability of the electrical connection when they are directly snapped together and electrically connected as a unit, as will be described in more detail below. The control structure 100 may be reusable and the infusion structure 110 may be disposable after a single use, as shown in fig. 1 a. In another embodiment of the present utility model, the infusion structure 110 and the control structure 100 are integrally designed, and are connected by a wire, and disposed inside the same housing 10, and are adhered to a certain position of the skin of the user by an adhesive patch 120, and then are discarded integrally after a single use, as shown in fig. 1b.

The patch-type drug infusion device of the embodiment of the present utility model includes a control structure 100. The control structure 100 is configured to receive signals or information from a remote device or a body fluid parameter testing device (e.g., a continuous blood glucose testing device) and to control the infusion device to complete the drug infusion. The housing 101 of the control structure 100 is provided with a program module, a circuit board, and related electronic components for receiving signals or sending control instructions, and other physical components or structures necessary for implementing the infusion function, and the like, which are not particularly limited herein. In some embodiments of the utility model, a power supply is also provided in the control structure. In an embodiment of the present utility model, a power source 133 is disposed in the infusion structure 110, as described below.

Fig. 2 a-2 b are schematic perspective views of a control structure 100 according to an embodiment of the present utility model.

The control structure 100 further includes a plurality of first electrical contacts 103 exposed at a surface of the control structure 100. The first electrical contact 103 serves as a circuit connection for electrically connecting the internal circuits provided in the control structure 100 and the infusion structure 110, respectively. The position where the first electrical contact 103 is provided is not particularly limited in the embodiment of the present utility model. Compared with the connecting end arranged as the plug connector, the contact area of the electric contact is smaller, the design can be flexible, and the volume of the control structure is effectively reduced. Meanwhile, the electric contact can be directly and electrically connected with an internal circuit or an electric element or can be directly welded on a circuit board, so that the design of the internal circuit is optimized, the complexity of the circuit is effectively reduced, the cost is saved, and the volume of the infusion device is reduced. Furthermore, the electrical contacts exposed on the surface of the control structure 100 may facilitate electrical interconnection with other structural connection terminals. The above technical advantages of the electrical contacts apply to the first electrical contact 103 on the control structure 100 and the second electrical contact 113 on the infusion structure 110, which will not be described in detail below.

The type of first electrical contact 103 comprises a rigid metal contact or a resilient conductive member. Preferably, in an embodiment of the present utility model, the first electrical contact 103 is a rigid metal contact. One end of the first electrical contact 103 is electrically connected to a connection terminal provided inside the control structure 100, and the other end is exposed to the surface of the housing 101, and the rest of the first electrical contact 103 is tightly embedded in the housing 101 to isolate the inside of the control structure 100 from the outside.

Here, the elastic conductive member includes a conductive spring, conductive silica gel, conductive rubber, or conductive elastic sheet, etc. Obviously, one end of the elastic conductive element is used for being electrically connected with the connecting end inside the control structure 100, and the other end is used for being electrically connected with other connecting ends. As in one embodiment of the utility model, the first electrical contact 103 is a conductive spring. The elasticity of the conductive spring can enhance the reliability of the electrical connection when the electrical contacts are in contact with each other. Similar to the rigid metal contacts, other portions of the conductive spring are tightly embedded in the housing 101 and electrically connected to internal circuits or electrical components, except that one end is exposed to the surface of the housing 101. Obviously, the connection terminals located inside the control structure 100 may be conductive leads, or specific parts of a circuit or an electrical component.

It should be noted that "tightly embedded" in the embodiment of the present utility model refers to no gap between the electrical contact and the housing 101, so as to seal the inside of the control structure 100. Hereinafter "tight embedding" is as defined herein.

In another embodiment of the utility model, the first electrical contact 103 is an electrically conductive spring, but is not tightly embedded in the housing 101, but is provided with a sealing member around the area where the first electrical contact 103 is arranged, the sealing member being arranged in a recess to seal the electrical connection location and the inside of the control structure 100.

In the embodiment of the present utility model, the control structure 100 is further provided with a first engaging portion 102. The first engaging portion 102 is configured to engage with the second engaging portion 112 of the infusion structure 110, so as to mutually assemble the control structure 100 and the infusion structure 110, and further electrically connect the first electrical contact 103 with the second electrical contact 113, which will be described in detail below.

The first engaging portion 102 and the second engaging portion 112 include one or more of a hook, a clamping block, a clamping hole, and a clamping groove that can be engaged with each other, and the positions thereof can be flexibly designed according to the shape structures of the control structure 100 and the infusion structure 110, for example, can be disposed in the corresponding structure or on the surface, etc., which is not limited herein.

In an embodiment of the present utility model, the control structure 100 is further provided with a recess 104 for mating with a protrusion 114 on the bottom of the housing of the infusion structure 110, as will be described in more detail below. Specifically, the first electrical contact 103 is disposed within the recess 104, as shown in fig. 2 b.

In an embodiment of the present utility model, a buzzer (not shown) is also provided within the control structure 100. The buzzer is used to emit alarm signals such as sound, vibration, etc. in the case of starting or ending infusion, failure of the infusion device, exhaustion of the medicine, the control structure 100 emitting an error command or receiving an error message, etc., so as to be convenient for the user to perceive and adjust in time.

In the embodiment of the present utility model, the casing 101 of the control structure 100 is provided with an acoustic hole 105, so as to transmit the sound alarm signal of the buzzer. In order to play a good sealing effect to ensure the normal operation of the buzzer, a waterproof sound-transmitting membrane (not shown) is provided between the sound-transmitting hole 105 and the buzzer. Therefore, the waterproof sound-transmitting membrane needs to have a certain porosity, so that water molecules can be prevented from entering the buzzer, and sound can be ensured to be transmitted out.

Compared with the traditional technical scheme of sealing the buzzer inside the control structure 100, after the sound transmission hole 105 is formed, the buzzer can emit smaller sound to be perceived by a user, so that the energy consumption of the buzzer is reduced, the power consumption configuration of the infusion device is optimized, and the production cost is saved.

Fig. 3a is a schematic perspective view of an infusion structure 110 according to an embodiment of the present utility model. Fig. 3b is a side view of the control structure 100 and infusion structure 110 of an embodiment of the present utility model assembled with each other.

The drug infusion device also includes an infusion structure 110. The interior of the housing is provided with an infusion module, a circuit module and other auxiliary modules for accomplishing drug infusion, as will be described in detail below. The housing of the infusion structure 110 may include multiple parts. As in the present embodiment, the housing of the infusion device includes an upper housing 111a and a lower housing 111b.

As described above, in the embodiment of the present utility model, the infusion structure 110 is provided with the second engaging portion 112. The second engaging portion 112 is configured to cooperate with and engage the first engaging portion 102. Therefore, the first engaging portion 102 corresponds to a position where the second engaging portion 112 is provided.

In an embodiment of the utility model, the infusion structure 110 is provided with a second electrical contact 113. The second electrical contacts 113 are adapted to be in pressing contact with the corresponding first electrical contacts 103 to electrically interconnect the control structure 100 with the infusion structure 110. The mutual compression between the two electrical contacts of different structures can improve the reliability of the electrical connection. Similar to the first electrical contact 103, the second electrical contact 113 is also of the type comprising a rigid metal contact or a resilient conductive member. Specifically, in an embodiment of the present utility model, the second electrical contact 113 is a conductive spring. Likewise, the conductive spring can enhance the electrical connection performance. A groove is also provided around the area where the second electrical contact 113 is provided, in which groove a sealing 115 is provided.

Preferably, in embodiments of the present utility model, the conductive spring has different diameters at both ends, the diameter exposed to the exterior of the infusion structure 110 is shorter, and the diameter at the interior portion of the infusion structure 110 is longer. The longer diameter can block the conductive spring within the housing. Thus, the longer diameter can avoid the conductive spring from falling off the infusion structure 110 when the control structure 100 is not mounted to the infusion structure 110.

Embodiments of the present utility model are not limited to the location where the second electrical contacts 113 are disposed, as long as they can be electrically connected to the corresponding first electrical contacts 103. Specifically, in the embodiment of the present utility model, the bottom of the housing 111a on the infusion structure 110 includes a protrusion 114. The second electrical contact 113 is arranged on the protrusion 114 as shown in fig. 3 a. The protruding portion 114 corresponds to the recess 104 of the control structure 100, and the protruding portion and the recess may be assembled with each other, so that the first electrical contact 103 and the corresponding second electrical contact 113 are pressed against each other, thereby achieving electrical connection.

In other embodiments of the present utility model, the protrusion 114 may be provided on the lower housing 111b, or when the housing of the infusion structure 110 is an integral body, the protrusion 114 is a part of the integral housing, which is not particularly limited herein.

The manner in which the control structure 100 and the infusion structure 110 are assembled to each other includes pressing the control structure 100 against the infusion structure 110 along the thickness direction of the infusion structure 110 so that the first engagement portion 102 and the second engagement portion 112 engage with each other. Or the control structure 100 may be pressed against the infusion structure 110 along the length of the infusion structure 110. Alternatively, the control structure 100 is pressed at an arbitrary angle between the thickness direction and the longitudinal direction of the infusion structure 110, so that the first engaging portion 102 and the second engaging portion 112 engage with each other. Preferably, in the implementation of the present utility model, the control structure 100 and the infusion structure 110 are assembled with each other in such a way that the control structure 100 is pressed against the infusion structure 110 along the thickness direction of the infusion structure 110, so that the first engagement portion 102 and the second engagement portion 112 engage with each other, as shown in the installation direction of fig. 3 b.

In an embodiment of the present utility model, the lower housing 111b of the infusion structure 110 comprises an outwardly extending portion 116, and the outside of the extending portion 116 is provided with a stop piece 117, as shown in fig. 3 a. As described above, the control structure 100 is pressed to the engagement position along the thickness direction of the infusion structure 110, and the blocking piece 117 can prevent the control structure 100 from falling off along the length direction of the infusion structure 110, so as to ensure the normal operation of the infusion device. Obviously, in other embodiments of the present utility model, if the control structure 100 is pressed to the engaged position in other directions, the control structure 100 can be prevented from falling off the infusion structure 110 by adjusting the position of the blocking piece 117.

It should be noted here that "outward" and "outward" are relative to the body portion of the infusion structure 110, and are relative positional concepts, the positional relationships being shown in fig. 3a or 3 b. Hereinafter, "outside" is as defined herein.

In the embodiment of the present utility model, the outer end of the extension 116 is further provided with a pressing portion 118 for releasing the blocking effect of the blocking piece 117. When the user is changing the infusion structure 110, the user can release the blocking piece 117 from blocking the control structure 100 by pressing the pressing portion 118 with his finger. The user removes the control structure 100 from the infusion structure 110 with two fingers.

The embodiment of the present utility model may also be provided with an unlocking hole 119. The unlocking hole 119 is provided inside the stopper 117. While pressing the pressing portion 118, the index finger can enter the unlocking hole 119 in a proper direction, so as to eject the control structure 100, thereby separating the control structure 100 from the infusion structure 110. In the embodiment of the present utility model, the unlocking hole 119 is square. The square unlocking hole 119 can facilitate smooth finger entry. In other embodiments of the present utility model, the unlocking hole 119 may have other shapes, and is not particularly limited herein.

A crease groove 140 is also provided on the lower housing 111b of the infusion structure 110. Crease grooves 140 are provided on the sides of the unlocking hole 119. After the crease grooves 140 are formed, the thickness or width of the lower case 111b at the positions of the crease grooves 140 is reduced, and when the user presses the pressing portion 118, the lower case 111b is easily broken at the crease grooves 140, so that the blocking of the control structure 100 by the blocking piece 117 can be more smoothly released.

The infusion structure 110 of the embodiment of the present utility model is further provided with an infusion needle 121 for infusing a drug subcutaneously.

The bottom of the lower housing 111b of the infusion structure 110 is further provided with an adhesive patch 120 for adhering the infusion device to the skin surface of a user. The adhesive patch 120 comprises an adhesive tape and release paper, wherein the surface of the adhesive tape is provided with ventilation holes which are uniformly arranged, so that the adhesive tape has ventilation property, and can help the water vapor and sweat secreted by the skin at the joint of a patient to be discharged, so that the water vapor and sweat are prevented from soaking the skin, and the skin of the patient is wrinkled.

Fig. 4b is a schematic perspective view of the internal structure of an infusion structure according to an embodiment of the present utility model. Fig. 4c is a schematic structural view of a cartridge and transition piece of an infusion structure according to one embodiment of the present utility model. Fig. 4d and 4e are schematic perspective views of the internal structure of an infusion structure according to various embodiments of the present utility model, respectively.

In an embodiment of the present utility model, the internal structure 130 includes a mechanical unit, an electronic control unit, etc. for performing an infusion function, such as a cartridge 131, a piston 132, a power source 133, a driving wheel 134, a screw 135, a driving unit (not shown), etc., disposed on the main frame 136.

In the prior art, as shown in fig. 4a, a three-way pillar 137 is further provided on the main frame 136, and the three-way pillar 137 is disposed near the position of the piston 132 when not injecting medicine, so that the three-way pillar 137 can be directly in sealed communication with the medicine injecting unit, the medicine storage cartridge 131 and the infusion needle 121, wherein the sealed communication means that medicine can flow to the medicine storage cartridge 131 or the infusion needle 121 after entering the three-way pillar 137 through the medicine injecting unit, but no leakage occurs, and preferably, the sealed communication can be realized through an elastic sealing member such as a silica gel member. In an embodiment of the present utility model, the drug injection unit is a syringe. When the medicine injection unit injects medicine through the medicine injection port of the three-way column 137 near the lower housing 111B, the medicine enters the medicine storage cartridge through the medicine storage cartridge connection port on the side surface of the three-way column 137, and pushes the piston 132 and the screw 135 to move toward the B end of the medicine storage cartridge 131; when the drug is filled, the drug infusion device starts to infuse the drug, the driving wheel 134 is driven to rotate by the movement of the driving unit, the driving screw 135 drives the piston 132 in the drug storage tube 131 to move at the end A of the drug storage tube, the drug flows out of the drug storage tube from the drug storage tube connecting port on the side face of the three-way column 137, enters the infusion needle 121 through the three-way column 137 close to the infusion needle connecting port of the upper shell 111a, and the drug is infused subcutaneously along with the infusion needle 121.

If, for some reason, the three-way pillar 137 cannot be disposed near the position of the piston 132 when not injecting medicine, then the three-way pillar 137 cannot be directly in sealed communication with the medicine storage tube 131, for example, in the prior art, the volume of the medicine infusion device is only 100U or 200U, in order to increase the volume of the medicine storage tube to 400U or 800U, prolong the service time of the medicine infusion device, and also consider the compactness of the internal design of the medicine infusion device, reduce the volume of the medicine infusion device, and also consider the aesthetic appearance of the medicine infusion device. Thus, in an embodiment of the present utility model, three-way post 137 is in sealed communication with the A-end of cartridge 131 via line 138.

As shown in fig. 4b, the pipe 138 is disposed outside the cartridge 131, and the pipe 138 may be a rigid pipe or a flexible pipe, which is not particularly limited herein, as long as the sealing communication between the three-way pillar 137 and the a end of the cartridge 131 is achieved. Preferably, the pipe 138 is a steel needle, so that one end of the pipe is convenient to pierce the three-way column 137, and the other end of the pipe pierces the end A of the medicine storage tube 131, and it should be noted that, in order to realize sealing communication, elastic sealing elements are arranged at two ends of the steel needle, which are connected with the ends of the three-way column 137 and the medicine storage tube 131A. When the pipeline 138 is a flexible pipeline, the two ends of the flexible pipeline can be in sealing communication with the three-way column 137 and the end of the medicine storage cylinder 131A through interference fit without arranging elastic sealing elements. In the embodiment of the present utility model, the pipe 138 is directly bent axially towards the screw 135 and inserted into the end a of the storage tube 131, and is in sealing communication with the storage tube 131 through an elastic sealing element or interference fit, or can be in sealing communication with the storage tube 131 through a transition part 140, specifically, the transition part 140 protrudes out of the bottom of the storage tube 131 and is directly communicated with the storage tube 131, and the other end is in sealing communication with the pipe 138, as shown in fig. 4c, so that the pipe 138 is prevented from being inserted into the storage tube 131 through bending to cause poor sealing communication effect. Preferably, in embodiments of the present utility model, the transition member 140 is integrally formed with the cartridge 140, and in other embodiments of the present utility model, the transition member 140 is a separate member that is in sealed communication with the cartridge via an elastomeric seal or interference fit.

The pipe 138 is disposed on the main frame 136 and supported by the main frame 167, so that two ends of the rigid pipe 138 are at the same horizontal position, which is convenient for the infusion and the infusion of the medicine, and the main frame 136 is further provided with a plurality of main frame clamping parts 139 for fixing the rigid pipe 138, so that the three-way column 137 and the medicine storage tube 131 are in more stable sealing communication.

In another embodiment of the present utility model, as shown in fig. 4c and 4d, the pipeline 138 is disposed in the medicine storage tube 131, one end of the pipeline 138 is connected with the three-way pillar 137 in a sealing manner, and the other end is embedded into the piston 132, so that the internal space of the medicine infusion device can be further utilized, the flexibility of the design of the internal space is increased, the volume of the medicine infusion device is reduced, for example, when the pipeline 138 is disposed in the medicine storage tube, the main frame 136 does not need to support the pipeline 138 again, the main frame clamping portion 139 is not needed to fix the pipeline, and the transition component 140 is not needed to change the flow direction of the medicine in the pipeline 138, so that the volume of the medicine infusion device can be greatly reduced. In fig. 4c, the conduit 138 is a rigid conduit, with both ends being in sealed communication with the three-way post 137 and the piston 132, respectively, via elastomeric seals 141. When the medicine is filled, the pipeline 138 is kept still, the piston 132 slides relative to the pipeline 138, and the piston 132 and the screw rod 135 move towards the end of the medicine storage cylinder 131; when a drug infusion is performed, the tubing 138 remains stationary, the piston 132 slides relative to the tubing 135, and the piston 132 and screw 135 move toward the cartridge 131A end. In fig. 4d, the pipeline 138 is a flexible tube, two ends of the flexible tube are respectively and fixedly connected with the three-way column 137 and the piston 132 through interference fit, in an initial state, the flexible tube is in a stretched state, the piston 132 moves towards the end of the medicine storage tube 131B during medicine filling, the flexible tube is gradually compressed to be shortened, and when medicine infusion is performed, the piston 132 moves towards the end of the medicine storage tube 131A, and the flexible tube is gradually stretched to be lengthened.

It should be noted that, in the embodiment of the present utility model, the communication manner between the three-way pillar 137 and the injection unit and between the injection needle 121 is not particularly limited, and may be directly and sealingly communicated, or may be indirectly and sealingly communicated through an external pipeline, so that the flexibility of the internal design of the drug infusion device may be further improved when the drug infusion device is indirectly communicated through the external pipeline.

A circuit board or a three-dimensional circuit coated on a part of the surface of the structure is also disposed in the infusion structure 110 in the embodiment of the present utility model, for supplying power to a specific structural unit. According to the internal structural characteristics of the infusion device, the shape and the position of the three-dimensional circuit can be flexibly designed, and the internal space of the infusion structure can be fully utilized, so that the structure is more compact. The circuit board is a rigid circuit board or a flexible circuit board. Preferably, in an embodiment of the present utility model, the circuit board is a flexible circuit board. The flexible circuit board is shaped to be flexible and can be flexibly designed according to the interior space of the infusion structure 110. Meanwhile, a plurality of connection ends can be arranged on the flexible circuit board to be electrically connected with different second electrical contacts 113, so that a circuit between the control structure 100 and the infusion structure 110 is conducted, and the infusion device can realize a normal infusion function.

In summary, the utility model discloses a patch type drug infusion device, wherein a three-way column in the drug infusion device is communicated with a drug storage cylinder in a sealing way through a pipeline, so that the three-way column can be flexibly arranged at the position of the drug infusion device, and the flexibility and diversity of the design inside the drug infusion device are improved. The type of the pipeline, such as a rigid pipeline or a flexible pipeline or a telescopic pipeline, and the arrangement position of the pipeline, such as the outer side or the inner side of the medicine storage cylinder, can be flexibly selected, so that the requirement of the internal design diversification is further met.

While certain specific embodiments of the utility model have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the utility model. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the utility model. The scope of the utility model is defined by the appended claims.

Claims (20)

1. A patch-type drug infusion device, comprising:

a cartridge for containing a medicament, the cartridge having a piston and a screw disposed therein;

the driving wheel is connected with the screw rod and drives the screw rod to push the piston to advance through rotation;

an infusion needle for infusing the drug subcutaneously;

the three-way column is communicated with the medicine injection unit, the medicine storage cylinder and the infusion needle, and the three-way column is communicated with the medicine storage cylinder in a sealing way through a pipeline; and

an adhesive patch for adhering the infusion device to a skin surface.

2. The patch drug infusion device of claim 1, wherein the tubing is disposed outside of the cartridge.

3. The patch-type drug infusion device of claim 2, further comprising a main frame supporting the tubing.

4. A patch drug infusion device as in claim 3, wherein the main frame is further provided with at least one main frame engagement portion for securing the tubing.

5. The patch drug infusion device of claim 4, wherein the tubing is rigid tubing with two ends in sealed communication with the three-way post and the cartridge through elastomeric seals.

6. The patch-type drug infusion device of claim 4, wherein the tubing is flexible tubing having two ends in sealing communication with the three-way post and the cartridge by interference fit.

7. A patch drug infusion device as claimed in claim 5 or claim 6, wherein the conduit is in sealed communication with the cartridge by means of a transition member.

8. The patch drug infusion device of claim 7, wherein the transition member is integrally formed with the cartridge.

9. The patch drug infusion device of claim 7, wherein the transition member is in sealed communication with the cartridge.

10. The patch drug infusion device of claim 1, wherein the tubing is disposed in the cartridge.

11. The patch drug infusion device of claim 10, wherein one end of the tubing is in communication with the three-way post and the other end is embedded in the piston.

12. The patch drug infusion device of claim 11, wherein the tubing is rigid tubing with two ends in sealed communication with the three-way post and the piston via elastomeric seals.

13. The patch-type drug infusion device of claim 11, wherein the tubing is a flexible hose, both ends of which are in sealing communication with the three-way post and the piston by interference fit.

14. The patch-type drug infusion device of claim 1, wherein the three-way post is in indirect sealed communication with the drug infusion unit via an external conduit.

15. The patch drug infusion device of claim 1, wherein the three-way post is in indirect sealed communication with the infusion needle through an external conduit.

16. The patch drug infusion device of claim 1, wherein the adhesive patch further comprises a tape and release paper, the surface of the tape further being provided with dense ventilation holes.

17. The patch drug infusion device of claim 1, wherein the infusion device comprises an infusion structure and a control structure, the cartridge, the drive wheel, the infusion needle and the tee post being disposed on the infusion structure.

18. The patch-type drug infusion device of claim 17, wherein the infusion structure and the control structure are a split-type structure, the control structure being reusable.

19. A patch drug infusion device as claimed in claim 17, wherein the infusion structure and the control structure are of unitary construction and are disposable in their entirety after use.

20. The patch drug infusion device of claim 18, wherein the infusion structure and the control structure are electrically connected by a plurality of electrical contacts.

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