Infusion pump apparatus

Abstract

The present application relates to the technical field of medical devices, and discloses an infusion pump apparatus, comprising a housing, a needle module, and a medicament delivery module. The housing comprises a bottom housing assembly and a front housing assembly. The needle module comprises a needle support, a medicament delivery metal conduit, a flexible indwelling catheter, a first support, a second support, a detection elastic piece, and a reset assembly. The needle support passes through the front housing assembly so as to be capable of moving along a first direction. The flexible indwelling catheter is sleeved on one end of the medicament delivery metal conduit. The medicament delivery metal conduit is fixed to the first support, and the flexible indwelling catheter is fixed to the second support. The detection elastic piece is fixed to the bottom housing assembly. When the flexible indwelling catheter is located at a drug injection position, the second support is engaged with the detection elastic piece. The reset assembly is used to drive the medicament delivery metal conduit to move relative to the flexible indwelling catheter in a direction opposite to the first direction. The medicament delivery module is used to store a medicament and deliver the medicament to the medicament delivery metal conduit. The described infusion pump apparatus can reduce product size.

Description

[0001] This application relates to the field of medical device technology, and particularly to an infusion pump device. Background Art: Currently, some infusion pumps are mounted on belts, carried in clothing pockets, or adhered to the skin as patches. When using these infusion pumps, the user injects medication by vertically inserting a metal infusion tubing into the skin. However, existing metal infusion tubing cannot be withdrawn after vertical insertion, causing a foreign body sensation and pain. To solve the problem of the metal infusion tubing not being able to withdraw from the skin, existing infusion pumps use an indwelling needle, which is embedded in the user's skin for injection. However, to ensure the indwelling needle penetrates the skin to a sufficient depth, the infusion pump often makes the needle's travel depth sufficiently large, resulting in a larger product size, making it inconvenient for the user to carry. Summary of the Invention: This application provides an infusion pump device that solves the problem of metal catheter withdrawal while also reducing the size of the infusion pump device. This application provides an infusion pump device, including a housing, an injection needle module, and a drug delivery module. The housing includes a bottom shell assembly and a front shell assembly, with the front shell assembly covering the bottom shell assembly. The injection needle module includes an injection needle support and a drug delivery metal conduit, a flexible indwelling tubing, a first support, a second support, a detection spring, and a reset assembly located within the housing. The injection needle support is movably inserted through the front shell assembly along a first direction, where the first direction is the arrangement direction of the front shell assembly and the bottom shell assembly. The flexible indwelling tubing extends along the first direction and is sleeved on one end of the drug delivery metal conduit, with an interference fit. The drug delivery metal conduit is fixed to the first support, the flexible indwelling tubing is fixed to the second support, and the detection spring is fixed to the bottom shell assembly. When the injection needle support moves along the first direction, it can drive the first support along the first direction. The portion of the drug delivery metal conduit located within the flexible indwelling tubing and the flexible indwelling tubing move along the first direction through the bottom shell assembly, and when the flexible indwelling tubing is in the injection position, the second bracket engages with the detection spring; the reset assembly is used to drive the portion of the drug delivery metal conduit located within the flexible indwelling tubing to move relative to the flexible indwelling tubing in the opposite direction along the first direction when the flexible indwelling tubing is in the injection position; the drug delivery module is used to store the drug and to deliver the drug to the drug delivery metal conduit.The infusion pump device provided in this application includes a first support, a second support, a detection spring, and a reset assembly inside the housing, with a drug delivery metal catheter fitted over a flexible indwelling tubing. During injection, the user can use the injection needle support to push the first support along a first direction, causing the drug delivery metal catheter, along with the flexible indwelling tubing, to pierce the user's skin. When the second support engages with the detection spring, the injection needle support is released, and the reset assembly drives the drug delivery metal catheter to detach from the user's skin, while the flexible indwelling tubing remains embedded in the skin. The drug delivery module then introduces the drug from the drug delivery metal catheter into the flexible indwelling tubing and into the user's body. By incorporating the reset assembly, the infusion pump device ensures that the drug delivery metal catheter detaches from the skin during injection, preventing pain for the user. The detection spring accurately detects the depth of the drug delivery metal catheter's penetration, facilitating control of the overall product height and avoiding the problem of increasing product size to ensure sufficient penetration depth in existing technologies. This allows for a smaller product size, making it easier for users to carry. In some possible implementations, the reset assembly includes a reset spring, one end of which is connected to the bottom housing assembly and the other end to the first bracket. In some possible implementations, the reset assembly includes a guide shaft extending along the first direction and fixed to the bottom housing assembly, with the reset spring sleeved on the guide shaft. In some possible implementations, the first bracket is made of metal, and the second bracket is made of metal O. In some possible implementations, an alarm buzzer is further included within the housing; two detection springs are spaced apart, and each detection spring is made of metal; the alarm buzzer is electrically connected to one of the detection springs, such that when the second bracket engages with both detection springs, the alarm buzzer is activated to sound an alarm. In some possible implementations, the drug delivery module includes a drug reservoir and a driving device; the drug reservoir stores the drug, and the driving device drives the drug in the reservoir to flow to the drug delivery metal conduit.In some possible implementations, the drug delivery module further includes a filtration assembly, which includes a filter container connected to the drug reservoir and a first filter layer, a second filter layer, and a filter sealing silicone plug arranged sequentially within the filter container along the flow direction of the drug from the drug reservoir to the drug delivery metal conduit. The drug delivery metal conduit passes through the filter sealing silicone plug. The first filter layer is used to filter particulate impurities with a diameter (λ) of 100 μm-1 μm, and the second filter layer is used to filter particulate impurities with a diameter (λ) of 0.2 μm-100 μm. In some possible implementations, the drive assembly includes a motor, a transmission assembly, and a piston. One end of the drug reservoir has an opening, and the piston seals the opening, with the drug located on the side of the piston away from the opening. One end of the transmission assembly is connected to the motor, and the other end is connected to the piston, so that the motor drives the piston to move toward the interior of the drug reservoir via the transmission assembly. In some possible implementations, a control unit and a signal recognition unit are further included. The signal recognition unit and the control unit are electrically connected, and the control unit and the motor are electrically connected. The signal recognition unit is used to recognize the signal of the injected drug, and the control unit controls the motor to operate according to the signal recognized by the signal recognition unit. In some possible implementations, the front housing assembly includes a front housing and a sealing cap. The front housing has a connection port, through which the injection needle holder is detachably inserted. The sealing cap is connected to the front housing and is used to close the connection port when the injection needle holder is separated from the connection port. Figure 1 is a schematic diagram of the overall structure of the infusion pump device in an embodiment of this application; Figure 2 is an exploded view of the infusion pump device in an embodiment of this application; Figure 3 is a schematic cross-sectional view of the injection needle module in an embodiment of this application; Figure 4 is a schematic cross-sectional view of the flexible indwelling tubing in Figure 3 when it is located at the injection station; Figure 5 is another schematic cross-sectional view of the flexible indwelling tubing in Figure 3 when it is located at the injection station; Figure 6 is a schematic cross-sectional view of the first support in Figure 3 when it returns to its initial position; Figure 7 is a schematic diagram of the internal structure of the infusion pump device in an embodiment of this application; Figure 8 is an exploded view of the drug delivery module in an embodiment of this application; Figure 9 is a partial schematic cross-sectional view of the drug delivery module in an embodiment of this application; Figure 10 is yet another partial schematic cross-sectional view of the drug delivery module in an embodiment of this application; Figure 11 is a schematic cross-sectional view of the drug delivery metal conduit in an embodiment of this application; Figure 12 is yet another schematic diagram of the overall structure of the infusion pump device in an embodiment of this application. (In the figures:)

[0002] 100 - Housing; 110 - Front housing assembly; 111 - Front housing; 1111 - Connection port; 1112 - Sealing cap; 112 - Side plate; 120 - Bottom housing assembly; 200 - Injection needle module; 210 - Injection needle support; 220 - Drug delivery metal tubing; 230 - Flexible indwelling tubing; 240 - First support; 250 - Second support; 260 - Detection spring; 270 - Reset assembly; 271 - Reset spring; 272 - Guide shaft; 300 - Drug delivery module; 310 - Drug reservoir; 311 - Opening; 320 - Drive unit; 321 - Motor; 322 - Lead screw; 323 - Push rod piston; 324 - Piston; 330 - Filter assembly; 331 - Filter container; 332 - First filter layer; 333 - Second filter layer; 3331 - Filter membrane; 3332 - Positioning ring; 334 - Filter sealing silicone plug; 335 - Annular abutment part; 400 - Alarm buzzer; 500 - Power module;

[0003] 600 - Signal recognition unit; 700 - Control unit. Detailed Description of Embodiments The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Referring to Figures 1 and 2, the infusion pump device in the embodiments of this application includes a housing 100, an injection needle module 200, and a drug delivery module 300, wherein the injection needle module 200 and the drug delivery module 300 are both disposed within the housing 100. Specifically, the housing 100 includes a front shell assembly 110 and a bottom shell assembly 120, with the front shell assembly 110 covering the bottom shell assembly 120 to form a housing 100 structure with an internal accommodating space. As shown in Figure 2, the front shell assembly 110 may include a front shell 111 and a side plate 112 connected to the front shell 111 around its circumference. When the front shell assembly 110 covers the bottom shell assembly 120, the front shell 111 and the bottom shell assembly 120 are opposite to each other, and the side plate 112 is used to connect the front shell 111 and the bottom shell assembly 120. In this case, the distance between the front shell 111 and the bottom shell assembly 120 can be understood as the height of the shell 100. Furthermore, the arrangement direction between the front shell assembly 110 and the bottom shell assembly 120 is set as the first direction, that is, the first direction is the height direction of the shell 100, and the first direction is perpendicular to the bottom shell assembly 120. oReferring to Figures 2 and 3, the injection needle module 200 includes an injection needle holder 210, a drug delivery metal conduit 220, a flexible indwelling tubing 230, a first support 240, a second support 250, a detection spring 260, and a reset assembly 270. The front housing 111 is provided with a connection port 1111, which is used to connect the interior and exterior of the housing 100. The injection needle holder 210 is movable relative to the front housing 111 along a first direction and passes through the connection port 1111, that is, one end of the injection needle holder 210 is located inside the housing 100, and the other end is located outside the housing 100. The drug delivery metal conduit 220, flexible indwelling tubing 230, first support 240, second support 250, detection spring 260, and reset assembly 270 are all located inside the housing 100. The first support 240 is fixedly connected to the drug delivery metal conduit 220, and the flexible indwelling tubing 230 is fixedly connected to the second support 250, so that the first support 240 and the second support 250 can respectively support the drug delivery metal conduit 220 and the flexible indwelling tubing 230. The flexible indwelling tubing 230 extends along a first direction and is movable relative to the housing 100 along the first direction. The flexible indwelling tubing 230 is sleeved on one end of the drug delivery metal conduit 220 and is press-fitted with the drug delivery metal conduit 220, meaning that the drug delivery metal conduit 220 and the flexible indwelling tubing 230 can remain relatively fixed without external interference. It should also be noted that, in the initial state, the end of the drug delivery metal catheter 220 protrudes from the flexible indwelling tubing 230 after passing through it, facilitating rapid insertion of the drug delivery metal catheter 220 into the user's skin. In this embodiment, when the infusion pump device is in its initial state, referring to Figure 3, the first support 240 is located near the front housing 111. One end of the injection needle support 210, located inside the housing 100, can contact the side of the first support 240 opposite to the bottom housing assembly 120. When the injection needle support 210 moves along the first direction, it can drive the first support 240 to move synchronously along the first direction, thereby moving the drug delivery metal catheter 220 and the flexible indwelling tubing 230 along the first direction. The bottom housing assembly 120 has a through-hole, allowing the flexible indwelling tubing 230 and the drug delivery metal catheter 220 to pass through the bottom housing assembly 120 and protrude from its surface during the movement of the flexible indwelling tubing 230 along the first direction.Referring to Figures 3 and 4, the detection spring 260 is fixed to the bottom shell assembly 120. Along the first direction, the second support 250 is located between the first support 240 and the detection spring 260. When the flexible indwelling tubing 230 moves along the first direction, the second support 250 moves toward the detection spring 260. When the flexible indwelling tubing 230 moves to the injection station, the second support 250 can engage with the detection spring 260. At this point, the flexible indwelling tubing 230 can no longer move along the first direction or in the opposite direction. It should be noted that the injection station can be understood as the relative position between the flexible indwelling tubing 230 and the bottom shell assembly 120 when the portion of the flexible indwelling tubing 230 and the drug delivery metal conduit 220 extending sufficiently out of the bottom shell assembly 120. At this point, the portion of the flexible indwelling tubing 230 and the drug delivery metal conduit 220 located outside the housing 100 penetrates the user's skin to a sufficient depth, thereby ensuring an effective injection effect. The reset assembly 270 may include a reset spring 271 and a guide shaft 272. The guide shaft 272 extends along a first direction, and one end of the guide shaft 272 is fixed to the bottom housing assembly 120. The reset spring 271 is sleeved on the guide shaft 272, and the reset spring 271 is extendable and retractable relative to the guide shaft 272 along the first direction. It is understood that by sleeved the reset spring 271 on the guide shaft 272, the guide shaft 272 guides the extension and retraction of the reset spring 271, ensuring that the reset spring 271 deforms along the first direction. One end of the return spring 271 is connected to the bottom housing assembly 120, and the other end is connected to the first bracket 240. The first bracket 240 is also provided with a through groove extending along a first direction. The injection needle bracket 210 is also provided with a clearance groove on the side facing the first bracket 240. When the injection needle bracket 210 and the first bracket 240 move along the first direction, the end of the guide shaft 272 away from the bottom housing assembly 120 can pass through the through groove and be located in the clearance groove to avoid the guide shaft 272 interfering with the movement of the first bracket 240. When the user pushes the injection needle bracket 210 toward the inside of the housing 100, the first bracket 240 moves along the first direction, the return spring 271 is compressed, and an elastic return force is generated to reset the first bracket 240.Referring to Figure 6, when the second bracket 250 engages with the detection spring 260, the thrust acting on the injection needle bracket 210 can be canceled. Under the elastic restoring force of the return spring 271, the return spring 271 drives the first bracket 240 to move in the opposite direction of the first direction. This causes the portion of the first bracket 240 that is located inside the flexible indwelling tubing 230 to move relative to the flexible indwelling tubing 230 in the opposite direction of the first direction. At this time, it can be ensured that only the flexible indwelling tubing 230 is located inside the user's skin, while the drug delivery metal catheter 220 is detached from the user's skin. During subsequent drug injection, since only the flexible indwelling tubing 230 is embedded inside the user's skin, it will not cause pain to the user or cause skin trauma. Referring to Figures 2 and 5, the infusion pump device in this embodiment also includes a power module 500 and an alarm buzzer 400 disposed within the housing 100. Two detection springs 260 are provided, spaced apart, and are made of metal. One detection spring 260 is connected to the power module 500, and the other is electrically connected to the alarm buzzer 400. Under normal circumstances, since the two detection springs 260 do not contact each other, the power module 500 does not supply power to the alarm buzzer 400, and the alarm buzzer 400 will not sound an alarm. The second bracket 250 is also made of metal. When the second bracket 250 moves to the point where its two ends engage with the two detection springs 260 respectively, a circuit is formed between the two detection springs 260. At this time, the power module 500 can supply power to the alarm buzzer 400, which can then sound an alarm to remind the user that the medication delivery metal catheter 220 and the flexible indwelling tubing 230 have been inserted into the user's skin to a sufficient depth. Furthermore, the first bracket 240 in this embodiment can also be made of metal. It is worth noting that in this embodiment, the first bracket 240, the second bracket 250, and the detection springs 260 are all made of metal, allowing these components to be formed using a stamping process. Compared to existing plastic brackets, metal brackets can effectively reduce the vertical height (i.e., the dimension along the first direction), which is beneficial for reducing the overall thickness of the product.Referring to Figures 2, 7, and 8, the drug delivery module 300 in this embodiment includes a drug reservoir 310, a drive device 320, and a filter assembly 330. The drug reservoir 310 is used to store drugs. The filter assembly 330 is disposed between the drug reservoir 310 and the drug delivery metal conduit 220. The drive device 320 is used to drive the drug in the drug reservoir 310 to flow to the drug delivery metal conduit 220. Before the drug flows into the drug delivery metal conduit 220, the drug can pass through the filter assembly 330. The filter assembly 330 is used to filter the drug, thereby filtering out impurities in the drug. This not only prevents impurities from clogging the drug delivery metal conduit 200, but also prevents impurities from entering the user's body. Specifically, as shown in Figure 7, the drive device 320 may include a motor 321, a transmission assembly, and a piston 324. The transmission assembly may include, for example, a lead screw 322 and a push rod piston 323. The lead screw 322 is connected to the output shaft of the motor 321. The power module 500 supplies power to the motor 321, enabling the motor 321 to drive the lead screw 322 to rotate around its axis. The push rod block 323 is connected to the lead screw 322 in a transmission manner. When the lead screw 322 rotates, it drives the push rod block 323 to move relative to the lead screw 322 along its axis. The push rod block 323 is also connected to the piston 324. When the push rod block 323 moves along the axis of the lead screw 322, it drives the piston 324 to move synchronously along the axis of the lead screw 322. As shown in Figure 8, the end of the medicine reservoir 310 facing the drive device 320 has an opening 311. The piston 324 sealing cover 1112 closes to the opening 311, so that the interior of the medicine reservoir 310 maintains a sealed environment with the cooperation of the piston 324. The medicine is stored on the side of the medicine reservoir 310 away from the piston 324. When the push rod 323 drives the piston 324 to move along the axis of the lead screw 322, the piston 324 can move relative to the opening 311 of the medicine reservoir 310 towards or away from the interior of the medicine reservoir 310. The medicine reservoir 310 has a medicine outlet on the side opposite to the opening 311. When the piston 324 moves towards the interior of the medicine reservoir 310, the piston 324 applies pressure to the medicine inside the medicine reservoir 310, allowing the medicine to flow out from the medicine outlet.As shown in Figures 8 and 9, the filter assembly 330 includes a filter container 331 and a first filter layer 332, a second filter layer 333, and a filter sealing silicone plug 334 located within the filter container 331. The first filter layer 332, the second filter layer 333, and the filter sealing silicone plug 334 are arranged sequentially along the flow direction of the medication from the drug reservoir 310 to the medication delivery metal conduit 220. The end of the medication delivery metal conduit 220 away from the flexible indwelling tubing 230 passes through the filter sealing silicone plug 334, so that the end of the medication delivery metal conduit 220 is located within the filter container 331. In other words, when the medication flows out from the medication outlet of the drug reservoir 310, it passes sequentially through the first impurity filter layer 332, the second filter layer 333, and the filter sealing silicone plug 334 before entering the medication delivery metal conduit 220. Furthermore, after the first support 240 returns to its initial position, the end of the drug delivery metal conduit 220 remains within the flexible indwelling tubing 230, maintaining relative fixation between the drug delivery metal conduit 220 and the flexible indwelling tubing 230. This ensures that the drug can completely enter the flexible indwelling tubing 230 from the drug delivery metal conduit 220 and finally be injected into the user's skin. In this embodiment, the first filter layer 332 can be used for initial filtration of the drug, removing particulate impurities with a diameter of 100 μm-1 mm. The second filter layer 333 can perform secondary filtration of the drug, removing particulate impurities larger than 8 μm with a diameter of 0.2 μm-100 μm. Due to the blocking effect of the filter sealing silicone plug 334, the drug cannot flow out of the filter container 331 through other paths and can only flow out through the drug delivery metal conduit 220. Based on this, the material of the first filter layer 332 in this embodiment can be sponge or polyethylene, and the second filter layer 333 can include a filter membrane 3331, or the material of the second filter layer 333 can also be polyethylene. When the first filter layer 332 or the second filter layer 333 is made of polyethylene, the structure for filtration can be made using a PE sintering process. As shown in Figure 9, when the second filter layer 333 includes a filter membrane 3331, it also includes a positioning ring 3332. The positioning ring 3332 is located on the side of the filter membrane 3331 facing away from the first filter layer 332, and the two sides of the positioning ring 3332 abut against the filter sealing silicone plug 334 and the filter membrane 3331, respectively, so that the filter membrane 3331 fits into the first filter layer 332, thereby improving the filtration effect. The positioning ring 3332 and the filter membrane 3331 can be an integral structure to simplify the structure and facilitate assembly.Because the center of the positioning ring 3332 is hollow, when the drug delivery metal conduit 220 passes through the filter sealing silicone plug 334, the end of the drug delivery metal conduit 220 can extend into the hollow structure of the positioning ring 3332. After the drug passes through the filter membrane 3331, the hollow structure of the positioning ring 3332 can temporarily store the drug, allowing the drug to flow as much as possible into the drug delivery metal conduit 220, thus avoiding drug waste. This embodiment uses a secondary filtration method, which can prevent large particles of impurities from clogging the filter membrane 333, thereby preventing a decrease in the water permeability of the filter membrane 333 and preventing a reduction in the amount of drug passing through the filter membrane 333, thus affecting the injection effect. In addition, the secondary filtration method can also reduce the usable area of ​​the filter membrane 333 and improve the filtration effect. In some embodiments, referring to FIG10, when the material of the second filter layer 333 is polyethylene, the filter sealing silicone plug 334 has an annular abutment portion 335 on the side facing the second filter layer 333. The annular abutment portion 335 abuts against the second filter layer 333 on the side facing the second filter layer 333, thereby ensuring that the filter sealing silicone plug 334 and the second filter layer 333 are relatively fixed. Similarly, the annular abutment portion 335 has a hollow structure in the middle. When the drug delivery metal conduit 220 passes through the filter sealing silicone plug 334, the end of the drug delivery metal conduit 220 can extend into the hollow structure of the annular abutment portion 335 to facilitate the introduction of the drug delivery metal conduit 220 into the drug delivery metal conduit 220. The annular abutment portion 335 and the filter sealing silicone plug 334 can also be an integral structure to simplify the structure and facilitate assembly. As an optional implementation, the filter container 331 and the drug reservoir 310 can be an integral structure, which avoids the introduction of secondary impurities and thus ensures the quality of the drug. In some embodiments, referring to FIG11, the cross-sectional shape of the drug delivery metal conduit 220 passing through one end of the filter sealing silicone plug 334 is quincunx-shaped. With the same cross-sectional area, compared with the circular cross-section, the diameter of the inner ring of the quincunx-shaped cross-section is smaller than the diameter of the circular cross-section. When the drug contains small particulate impurities, the drug can be further filtered by the quincunx-shaped drug delivery metal conduit 220 when it enters the drug delivery metal conduit 220. Referring again to Figure 7, the drug reservoir 310, filter assembly 330, drive device 320, power module 500, and injection needle module 200, excluding the injection needle support 210, are all mounted on the bottom shell assembly 120. Furthermore, each structural component is laid flat on the bottom shell assembly 120 independently, and there is no overlapping arrangement between any two structural components.On the one hand, the structure of the above-mentioned components is compact; on the other hand, it helps to reduce the vertical height of the infusion pump device, thereby reducing the size of the product. Referring again to Figure 2, the infusion pump device in this embodiment also includes a signal identification unit 600 and a control unit 700 disposed within the housing 100. The signal identification unit 600 may be, for example, an antenna assembly for communication reception and transmission, and the control unit 700 may be, for example, a circuit board. As mentioned earlier, the alarm buzzer 400 can remind the user that the flexible indwelling tubing 230 has been inserted into the skin. At this time, the user can operate, for example, on a mobile phone and generate a signal for injecting the drug. After receiving the signal, the signal identification unit 600 sends the signal to the control unit 700. The control unit 700 can control the motor 321 to operate according to the received signal, thereby driving the piston 324 to move so that the drug in the reservoir 310 flows to the drug delivery metal conduit 220. The power module 500 in this embodiment can also be used to supply power to the control unit 700 and the signal identification unit 600 to ensure the normal operation of each electronic component. Referring to Figures 2 and 12, the injection needle module 200 is detachably connected to the front housing 111. When the flexible indwelling tubing 230 needs to be inserted into the user's skin, the injection needle holder 210 can be installed on the front housing 111. The front housing 111 is also connected to a sealing cap 1112, which can rotate or move relative to the front housing 111, so that the sealing cap 1112 can be closed on the connection port 1111 or the connection port 1111 can be exposed. That is to say, when the infusion pump device in this embodiment is not in use, the sealing cap 1112 is closed on the connection port 1111 to ensure that the interior of the housing 100 is isolated from the outside world and to prevent external impurities from entering the interior of the housing 100. When it is necessary to inject medication, the sealing cap 1112 can be opened first, the injection needle holder 210 can be installed on the connection port 1111, and the flexible indwelling tubing 230 can be inserted. Once the flexible indwelling tubing 230 is inserted into the skin, the injection needle holder 210 is removed, and the connection port 1111 is covered with the sealing cap 1112 to ensure that the interior of the housing 100 is isolated from the outside. It should be understood that, for the infusion pump device in this embodiment, the injection needle holder 210 can be considered a general-purpose component; that is, the injection needle holder 210 can be manufactured and sold separately. Furthermore, the detachable nature of the injection needle holder 210 further reduces the size of the infusion pump device when not in use, making it easier for users to carry.Based on the description of the infusion pump device in this embodiment, the specific process for using the infusion pump device can be referred to as follows: First, open the sealing cover 1112 and install the injection needle bracket 210 into the connection port 1110. Then, place the outer surface of the bottom shell assembly 120 against the user's skin surface and press the injection needle bracket 210 so that the drug delivery metal catheter 220 pierces the user's skin, so as to facilitate the insertion of the flexible indwelling tubing 230 into the user's skin. When the drug delivery metal catheter 220 is inserted into place, the second bracket 250 engages with the detection spring 260, at which point the alarm buzzer 400 sounds an alarm. Next, the user releases the injection needle bracket 210, and the return spring 271 drives the drug delivery metal catheter 220 to separate from the flexible indwelling tubing 230, so that the drug delivery metal catheter 220 leaves the user's skin and returns to the housing 100, while the flexible indwelling tubing 230 is embedded in the user's skin. Next, the user removes the injection needle holder 210 and closes the sealing cap 1112 onto the connection port 1111 to prevent particulate matter from entering the housing 100. Then, the user sends a signal for drug injection using the signal recognition module. The control unit 700 drives the motor 321 according to the signal, causing the piston 324 to push the drug in the reservoir 310 into the drug delivery metal conduit 220. The drug is then introduced through the drug delivery metal conduit 220 into the flexible indwelling tubing 230, thereby entering the user's body. In the infusion pump device of this embodiment, the bottom shell assembly 120 remains in contact with the user's skin during drug injection, thus achieving vertical injection. Furthermore, the drug delivery metal conduit 220 withdraws from the user's skin during injection, so the user does not experience any foreign body sensation or pain. Furthermore, by using the detection spring 260 to detect the depth of the drug delivery metal catheter 220 penetrating the skin, sufficient penetration depth can be ensured without excessively increasing the product's dimensions in the vertical injection direction, thus reducing product size and making it easier for users to carry. Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the invention. Therefore, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

Claims

Claims 1. An infusion pump device, characterized by, The device includes a housing, an injection needle module, and a drug delivery module. The housing includes a bottom shell assembly and a front shell assembly, with the front shell assembly covering the bottom shell assembly. The injection needle module includes an injection needle support and a drug delivery metal conduit, a flexible indwelling tubing, a first support, a second support, a detection spring, and a reset assembly located within the housing. The injection needle support is movably inserted through the front shell assembly along a first direction, where the first direction is the arrangement direction of the front shell assembly and the bottom shell assembly. The flexible indwelling tubing extends along the first direction and is sleeved on one end of the drug delivery metal conduit, with an interference fit. The drug delivery metal conduit is fixed to the first support, the flexible indwelling tubing is fixed to the second support, and the detection spring is fixed to the bottom shell assembly. When the injection needle support moves along the first direction, it drives the first support along the first direction, causing the portion of the drug delivery metal conduit located within the flexible indwelling tubing and the flexible indwelling tubing to move along the first direction through the bottom shell assembly. Furthermore, when the flexible indwelling tubing is in the injection position, the second bracket engages with the detection spring; the reset assembly is used to drive the portion of the drug delivery metal conduit located inside the flexible indwelling tubing to move relative to the flexible indwelling tubing in the opposite direction along the first direction when the flexible indwelling tubing is in the injection position; the drug delivery module is used to store the drug and to deliver the drug to the drug delivery metal conduit.

2. The infusion pump device of claim 1, characterized in that The reset assembly includes a reset spring, one end of which is connected to the bottom shell assembly and the other end of which is connected to the first bracket.

3. The infusion pump device of claim 2, wherein, The reset assembly includes a guide shaft extending along the first direction and fixed to the bottom housing assembly. The return spring is sleeved on the guide shaft.

4. The infusion pump device of claim 1, wherein The first bracket is made of metal, and the second bracket is made of metal.

5. The infusion pump device of claim 4, wherein It also includes an alarm buzzer disposed within the housing; there are two detection springs, which are spaced apart, and the material of the detection springs is metal; the alarm buzzer is electrically connected to one of the detection springs, so that when the second bracket engages with both detection springs, the alarm buzzer is driven to sound an alarm.

6. The infusion pump device of claim 1, wherein The drug delivery module includes a drug reservoir and a drive device. The drug reservoir is used to store drugs, and the drive device is used to drive the drugs in the drug reservoir to flow to the drug delivery metal conduit.

7. The infusion pump device of claim 6, wherein, The drug delivery module further includes a filtration assembly, which includes a filter container connected to the drug reservoir and a first filter layer, a second filter layer, and a filter sealing silicone plug located within the filter container and arranged sequentially along the flow direction of the drug from the drug reservoir to the drug delivery metal conduit. The drug delivery metal conduit passes through the filter sealing silicone plug. The first filter layer is used to filter particulate impurities with a diameter e of 100 μm to 1 μm, and the second filter layer is used to filter particulate impurities with a diameter of 0.2 μm to 100 μm.

8. The infusion pump device of claim 6, wherein, The drive assembly includes a motor, a transmission assembly, and a piston; one end of the drug reservoir has an opening, the piston is sealed to the opening, and the drug is located on the side of the piston away from the opening; one end of the transmission assembly is connected to the motor, and the other end is connected to the piston, so that the motor drives the piston to move toward the interior of the drug reservoir through the transmission assembly.

9. The infusion pump device of claim 8, wherein, Also includes control unit and A signal recognition unit is electrically connected to the control unit, and the control unit is electrically connected to the motor. The signal recognition unit is used to recognize the signal of the injected drug, and the control unit controls the motor to work according to the signal recognized by the signal recognition unit.

10. The infusion pump device of claim 1, wherein The front housing assembly includes a front housing and a sealing cap; the front housing has a connection port, through which the injection needle support is detachably inserted; the sealing cap is connected to the front housing and is used to close the connection port when the injection needle support is separated from the connection port. 15

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