Button module and patch-type drug delivery pump

Abstract

The present application relates to the technical field of medical devices, and discloses a button module and a patch-type drug delivery pump. The button module comprises a needle insertion button and a button support. One side of a housing is provided with a mounting recess, the bottom of the mounting recess has an opening, so that the mounting recess communicates with the interior of the housing, and the button support is snap-fitted in the mounting recess. A mounting hole is provided on a side of the button support facing away from the housing, and the needle insertion button passes through the mounting hole and the opening and is movable relative to the button support along an axial direction of the mounting hole. A first damping ring and a second damping ring are provided on a surface of the needle insertion button, and a first fastener is provided on an inner wall of the mounting hole. When the button module is in an initial state, the first fastener is engaged between the first damping ring and the second damping ring; when the button module moves toward the interior of the housing to enable a needle assembly to insert a needle, the first damping ring is located on the side of the first fastener facing the housing. The described button module enables manual needle insertion, and also achieves the effect of injecting an indwelling needle into place in one step.

Description

[0001] This application relates to the field of medical device technology, and particularly to a button module and a patch-type infusion pump. Background Art: Before injecting medication into the user's body, patch-type infusion pumps require inserting an indwelling needle, and then injecting the medication into the user's body through the indwelling needle. Currently, some patch-type infusion pumps on the market require the use of an auxiliary large syringe for injection. This results in users having to wear the infusion pump and assemble the syringe, making the wearing process cumbersome, and the auxiliary syringe also increases costs. Although some patch-type infusion pumps use a manual injection method, users may pause the injection due to pain, preventing the indwelling needle from being injected in one go, affecting the user experience. Summary of the Invention: This application provides a button module and a patch-type infusion pump that not only enables manual injection, reducing costs, but also achieves the effect of injecting the indwelling needle in one go. In a first aspect, this application provides a button module applied to a patch-type drug infusion pump. The patch-type drug infusion pump includes a housing and an injection needle assembly located inside the housing. The button module includes an injection needle button and a button bracket. A mounting groove is provided on one side of the housing, and the bottom of the mounting groove has an opening to communicate with the interior of the housing. The button bracket is snapped into the mounting groove. A mounting hole is provided on the side of the button bracket facing away from the housing. The injection needle button passes through the mounting hole and the opening, and the injection needle button is movable relative to the button bracket along the axial direction of the mounting hole. The surface of the injection needle button is provided with a first damping ring and a second damping ring distributed circumferentially along the mounting hole. The first damping ring and the second damping ring are arranged along the axial direction of the mounting hole. A first buckle is provided on the inner wall of the mounting hole. When the button module is in its initial state, the first buckle is snapped between the first damping ring and the second damping ring. When the button module moves toward the interior of the housing to inject the injection needle assembly, the first damping ring is located at the first… The button module provided in this application mounts the injection needle button onto the housing of a patch-type infusion pump via a button bracket, allowing the injection needle button to move inward toward the housing, thereby driving the injection needle assembly to inject the indwelling needle into the user's body. A first damping ring and a second damping ring are provided on the surface of the injection needle button, and a first latch is provided on the button bracket. When the injection needle button is in its initial state, the first latch engages between the first and second damping rings, allowing the end of the injection needle button located inside the housing to contact the injection needle assembly.When the user manually presses the injection needle button, under the obstruction of the first latch, the injection needle button must move at least a dimension along the axis of the mounting hole towards the interior of the housing, allowing the first damping ring to pass over the first latch, thus enabling effective movement of the injection needle button. During this process, the injection needle button drives the injection needle assembly to inject the indwelling needle into the user's body. Therefore, the button module in this application can be designed with the dimension of the first latch along the axis of the mounting hole in mind, allowing the indwelling needle to be injected into place in one go when the user presses the injection needle button, improving the user experience. Thus, the button module in this application can not only achieve manual injection but also achieve the effect of injecting the indwelling needle into place in one go. In some possible embodiments, there are multiple first latches, and the majority of the first latches are circumferentially distributed around the mounting hole and spaced apart. In some possible embodiments, the side of the first latch facing away from the inner wall of the mounting hole has a guide surface, which is used to guide the injection needle button moving towards the interior of the housing. In some possible implementations, the first damping ring includes multiple first annular protrusions, which are circumferentially spaced around the mounting hole, and each first annular protrusion corresponds to each first buckle; the second damping ring includes multiple second annular protrusions, which correspond to each first annular protrusion. In some possible implementations, the inner wall of the mounting hole is further provided with a plurality of second snaps, which are evenly distributed around the circumference of the mounting hole; the second snaps are located on the side of the first snap away from the housing, and each second snap abuts against the injection pin button. In some possible implementations, the button bracket is provided with a plurality of third snaps on the side facing the housing, and the housing is provided with snap-fit ​​holes corresponding to the plurality of third snaps, each of the third snaps engaging with the corresponding snap-fit ​​hole. In some possible implementations, the button bracket and the housing are detachably connected, and the button module further includes a sealing cover plate, which is connected to the housing and can slide relative to the housing so that the sealing cover plate covers the groove of the mounting slot. In some possible implementations, the housing is provided with a foolproof spring, which is used to fix the sealing cover plate relative to the housing when the sealing cover plate is closed in the mounting slot.In some possible implementations, a silicone pad is provided on the side of the sealing cover facing the mounting groove, and the silicone pad abuts against the bottom of the mounting groove; the silicone pad has a ring structure, and when the sealing cover is closed on the mounting groove, the silicone pad is arranged circumferentially around the opening. Secondly, this application provides a patch-type infusion pump, including a housing, an injection needle assembly, and a button module as described in any possible implementation of the first aspect, wherein the injection needle assembly is located inside the housing, and the button module is used to drive the injection needle assembly to inject an indwelling needle into the user's body. Figure 1 is an exploded structural diagram of a patch-type drug delivery pump according to an embodiment of this application; Figure 2 is a partial structural cross-sectional view of the button module according to an embodiment of this application; Figure 3 is a cross-sectional view of the patch-type drug delivery pump in its initial state according to an embodiment of this application; Figure 4 is a structural diagram of a button bracket according to an embodiment of this application; Figure 5 is a structural diagram of an injection needle button according to an embodiment of this application; Figure 6 is a structural diagram of the button bracket from another perspective according to an embodiment of this application; Figure 7 is a structural diagram of the patch-type drug delivery pump with the button module removed according to an embodiment of this application; Figure 8 is a structural diagram of the sealing cover plate in Figure 7 covering the mounting groove; Figure 9 is a cross-sectional view of the sealing cover plate and the front shell according to an embodiment of this application; Figure 10 is a cross-sectional view of the sealing cover plate of the patch-type drug delivery pump in the first position according to an embodiment of this application; Figure 11 is a cross-sectional view of the sealing cover plate in Figure 10 in the second position. (The figures are incomplete.)

[0002] 100 - Housing; 110 - Front Housing; 111 - Mounting Slot; 1111 - Opening; 120 - Rear Housing; 200 - Button Module; 210 - Button Bracket; 211 - Mounting Part; 2111 - First Mounting Plate; 2112 - Second Mounting Plate; 212 - Mounting Hole; 2121 - First Clip; 21211 - Guide Surface; 2122 - Second Clip; 213 - Third Clip; 220 - Injection Needle Button; 221 - First Damping Ring; 2211 - First Annular Protrusion; 222 - Second Damping Ring; 2221 - Second Annular Protrusion; 230 - Sealing Cover; 231 - Limiting Protrusion; 240 - Silicone Pad; 300 - Injection Needle Assembly; 310 - Injection Needle Bracket; 320 - Drug Delivery Tube; 400 - Anti-foolproof spring. 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 FIG1, the patch-type infusion pump in this application embodiment may include a housing 100, a button module 200, and an injection needle assembly 300. The housing 100 may include a front housing 110 and a rear housing 120, which can be interlocked to provide an internal accommodating space for placing the injection needle assembly 300. The button module 200 is disposed on the front housing 110 and can be used to provide driving force to the injection needle assembly 300 within the housing 100, so that the injection needle assembly 300 can inject the indwelling needle into the user's body. As shown in Figure 1, the button module 200 may include a button bracket 210, a needle button 220, and a sealing cover 230. Both the button bracket 210 and the sealing cover 230 are connected to the front housing 110, and the needle button 220 is mounted on the button bracket 210. Specifically, referring to Figures 1 and 2 together, the button bracket 210 may include a mounting portion 211 and a mounting hole 212. The front housing 110 has a mounting groove 111 on the side opposite to the rear housing 120, which conforms to the shape of the mounting portion 211, allowing the mounting portion 211 to be accommodated within the mounting groove 111. Furthermore, each side of the mounting portion 211 can abut against the inner wall of the mounting groove 111, ensuring a good positioning effect between the button bracket 210 and the mounting groove 111.The mounting hole 212 is connected to the side of the mounting portion 211 opposite to the mounting groove 111. The axial direction of the mounting hole 212 is consistent with the injection needle direction of the injection needle assembly 300. The bottom of the mounting groove 111 has an opening 1111, which can be used to communicate between the mounting groove 111 and the interior of the housing 100. The mounting hole 212 is directly opposite the opening 1111. One end of the injection needle button 220 passes through the mounting hole 212 and the opening 1111, extending into the interior of the housing 100. The injection needle assembly 300 may include an injection needle support 310 and a drug delivery tube 320. The indwelling needle is located within the drug delivery tube 320, which is connected to the injection needle support 310. The injection needle button 220 can contact the injection needle support 310. The injection needle button 220 can move relative to the mounting hole 212 along the axial direction of the mounting hole 212 toward the interior of the housing 100, thereby driving the injection needle support 310 to move, so that the injection needle support 310 can drive the indwelling needle in the drug delivery tube 320 into the user's body. Referring to Figures 2 and 3, the surface of the end of the injection needle button 220 that passes through the mounting hole 212 may be provided with a first damping ring 221 and a second damping ring 222. The first damping ring 221 is located on the side of the second damping ring 222 away from the housing 100. The two are arranged around the circumference of the mounting hole 212, and the first damping ring 221 and the second damping ring 222 are arranged along the axial direction of the mounting hole 212, with a gap between them. The inner wall of the mounting hole 212 may be provided with a first latch 2121. When the injection needle button 220 is in the initial state, the first latch 2121 is engaged between the first damping ring 221 and the second damping ring 222. At this time, without the action of external force, the injection needle button 220 and the button bracket 210 remain relatively fixed under the cooperation of the first latch 2121, the first damping ring 221 and the second damping ring 222. When the user manually presses down on the injection needle button 220, a large driving force can be applied to the injection needle button 220. This driving force can drive the injection needle button 220 to move toward the inside of the housing 100, thereby causing the first damping ring 221 to move to the side of the first latch 2121 facing the housing 100.It should be understood that during this process, when the injection needle button 220 moves, it drives the injection needle assembly 300 to perform injection. Since the first latch 2121 is engaged between the first damping ring 221 and the second damping ring 222 in the initial state, to ensure that the injection needle button 220 can move relative to the button bracket 210, the injection needle button 220 needs to move at least one dimension along the axis of the mounting hole 212 at a time to achieve an effective injection needle pressing effect. Thus, by designing the dimension of the first latch 2121 along the axis of the mounting hole 212, the injection is completed after the first damping ring 221 passes the first latch 2121, achieving a one-time injection effect based on manual injection. In some embodiments, referring to Figures 4 and 5, there may be multiple first latches 2121. These first latches 2121 are evenly and spaced apart around the axial direction of the mounting hole 212, thereby balancing the forces on the injection needle button 220 and the button support 210, ensuring that the injection needle support 310 can move along the axial direction of the mounting hole 212. Based on this, the first damping ring 221 may include multiple spaced first annular protrusions 2211, and the second damping ring 222 may include multiple spaced second annular protrusions 2221. The first latches 2121, the first annular protrusions 2211, and the second annular protrusions 2221 are correspondingly arranged. Furthermore, the arc dimensions of the first latches 2121, the first annular protrusions 2211, and the second annular protrusions 2221 along the circumference of the mounting hole 212 are the same to achieve a better damping effect. Further, referring again to Figure 2, A guide surface 21211 may be provided on the side of the first latch 2121 facing away from the inner wall of the mounting hole 212. This guide surface 21211 can be used to guide the injection needle button 220 moving towards the inside of the housing 100. In a specific implementation, as shown in Figure 2, there is a certain angle between the guide surface 21211 and the inner wall of the mounting hole 212. This angle is between 0 and 90°, so that the guide surface 21211 is inclined relative to the inner wall of the mounting hole 212.Furthermore, the end of the guide surface 21211 near the inner wall of the mounting hole 212 is higher than the end away from the inner wall of the mounting hole 212 in the axial direction of the mounting hole 212. When the injection needle button 220 moves toward the inside of the housing 100, the guide surface 21211 can guide the first damping ring 221, making it easier for the first damping ring 221 to pass over the first buckle 2121. In addition, as an optional implementation, referring to FIG5, the cross-section of the first annular protrusion 2211 can be tapered. When the first buckle 2121 is engaged between the first annular protrusion 2211 and the second annular protrusion 2221, the lower surface of the first annular protrusion 2211 can fit as closely as possible to the guide surface 21211 of the first buckle 2121, thereby improving the engagement effect between the two. Similarly, the cross-section of the second annular protrusion 2221 can also be conical. When the injection needle button 220 and the button bracket 210 are assembled from top to bottom, the second annular protrusion 2221 can more easily pass over the first latch 2121 and engage the first latch 2121 between the first damping ring 221 and the second damping ring 222. It is worth noting that when the first damping ring 221 and the second damping ring 222 are designed as a segmented structure, it not only facilitates the control of the resistance values ​​of the first damping ring 221 and the second damping ring 222, but also facilitates production. Similarly, a segmented design of multiple first latches 2121 can also facilitate the control of the resistance values ​​of the first latches 2121 and facilitate production. In some embodiments, referring to Figures 2 or 4, the inner wall of the mounting hole 212 may also be provided with a plurality of second snap fasteners 2122 on the side of the first snap fastener 2121 away from the housing 100. The plurality of second snap fasteners 2122 are evenly distributed around the circumference of the mounting hole 212. When the injection needle button 220 passes through the mounting hole 212, the second snap fasteners 2122 are located on the side of the first damping ring 221 away from the first snap fastener 2121. Each second snap fastener 2122 can abut against the surface of the injection needle button 220, thereby allowing the plurality of second snap fasteners 2122 to cooperate in limiting the injection needle button 220 in the circumferential direction of the mounting hole 212 to prevent the injection needle button 220 from tilting, and thus allowing the injection needle button 220 to move only along the axial direction of the mounting hole 212.In addition, the number of second clips 2122 is the same as the number of first clips 2121. Each second clip 2122 can be directly aligned with the gap between two adjacent first clips 2121. When the injection needle button 220 is assembled with the button bracket 210 from top to bottom, the first annular protrusion 2211 and the second annular protrusion 2221 can avoid the second clips 2122 and engage with the first clips 2121, simplifying the assembly of the injection needle button 220 and the button bracket 210, saving time and effort. In addition, the design of the first damping ring 221, the second damping ring 222, the first buckle 2121, and the second buckle 2122 in this embodiment can also limit the position of the injection needle button 220, so that the injection needle button 220 can be coaxial with the injection needle bracket 310, thereby avoiding the offset of the center position between the two during transportation, which would affect the injection needle effect. Referring to Figures 3 and 6, the mounting part 211 can be roughly L-shaped, and its bending angle is the same as the bending angle of the end of the front shell 110, so that when a part of the mounting part 211 is engaged with the mounting groove 111, the part installed outside the mounting groove 111 can fit against the side wall surface of the front shell 110. Specifically, the mounting part 211 can be regarded as including the first mounting plate 2111 and the second mounting plate 2112. The first mounting plate 2111 and the second mounting plate 2112 can be an integral design, with the first mounting plate 2111 facing the large surface of the front shell 110. The second mounting plate 2112 faces the side wall of the front housing 110. The mounting portion 211 facing the housing 100 may be provided with multiple third latches 213, wherein at least one third latch 213 is provided on the second mounting plate 2112, and the remaining third latches 213 are provided on the first mounting plate 2111 and arranged around the mounting hole 212. As an optional embodiment, a portion of the second mounting plate 2112 may face the side wall of the rear housing 120. In this case, the third latches 213 provided on the second mounting plate 2112 are located at the portion of the second mounting plate 2112 facing the side wall of the rear housing 120. The rear housing 120 may be provided with snap-fit ​​holes (not shown in the figure) corresponding to the third latches 213 on the second mounting plate 2112, so that the third latches 213 on the second mounting plate 2112 can be engaged in the snap-fit ​​holes of the rear housing 120. This ensures that the button bracket 210 remains relatively fixed to the housing 100 in the height direction.Furthermore, the front housing 110 may be provided with a snap-fit ​​hole (not shown in the figure) corresponding to the third snap 213 on the first mounting plate 2111, so that the third snap 213 on the first mounting plate 2111 can be engaged in the snap-fit ​​hole of the front housing 110, thereby ensuring the relative fixation between the button bracket 210 and the housing 100, and thus ensuring that the position of the injection needle button 220 is fixed during use. It should be understood that in this embodiment, the button bracket 210 is installed on the housing 100 by snap-fitting with the snap-fit ​​hole, which also facilitates the removal of the button bracket 210 from the housing 100 after injection. That is to say, the button bracket 210 and the housing 100 are detachably connected in this embodiment. Specifically, when removing the button bracket 210, the second mounting plate 2112 can be lifted relative to the housing 100 first, so that the third snap 213 on the second mounting plate 2112 disengages from the corresponding snap-fit ​​hole. Then, pull the injection needle button 220 upwards. Since the first damping ring 221 of the injection needle button 220 is located below the first latch 2121 at this time, when the injection needle button 220 is pulled upwards, the first damping ring 221 contacts the bottom of the first latch 2121, but the first damping ring 221 cannot pass over the first latch 2121 to return to the state where the first damping ring 221 is located above the first latch 2121. Therefore, the injection needle button 220 and the button bracket 210 are relatively fixed at this time. Continue to pull the injection needle button 220 upwards, so that the third latch 213 on the first mounting plate 2111 can disengage from the corresponding snap-fit ​​hole, thereby allowing the injection needle button 220 and the button bracket 210 to be removed from the housing 100 as a whole. Referring to Figures 7 and 8, the sealing cover 230 can be connected to the front shell 110. When the button bracket 210 is removed from the shell 100, the sealing cover 230 can slide relative to the front shell 110, thereby covering the opening of the mounting groove 111, making the interior of the shell 100 sealed to ensure the subsequent drug injection effect. Exemplarily, in this embodiment, the opposite sides of the sealing cover 230 can be respectively connected to the side walls of the mounting groove 111. The sealing cover 230 can be slidably connected to the side walls of the mounting groove 111 through a slider structure, thereby achieving relative sliding between the sealing cover 230 and the mounting groove 111. In addition, the sealing cover 230 can also be connected to the housing 100 by a spring. When the button bracket 210 is installed on the housing 100, the sealing cover 230 is in the first position, and the button bracket 210 abuts against the sealing cover 230. At this time, the spring is in a compressed state, which makes the sealing cover 230 tend to slide relative to the housing 100.When the button bracket 210 is removed, the spring force is released, driving the sealing cover 230 to slide to the second position, thereby causing the sealing cover 230 to close onto the mounting groove 111. As an optional implementation, when the sealing cover 230 is closed onto the mounting groove 111, the spring remains compressed, allowing the sealing cover 230 to tend to slide further forward relative to the housing 100, thus improving the closing effect between the sealing cover 230 and the mounting groove 111. Of course, in other embodiments, the sealing cover 230 can be slidably connected to the side wall of the mounting groove 111 via a slider structure. After removing the button bracket 210, the user can also manually push the sealing cover 230 to slide, causing it to close onto the mounting groove 111. Based on this, referring to Figures 9 to 11, a limiting protrusion 231 may also be provided on the side of the sealing cover 230 facing the housing 100, and a foolproof spring 400 may be provided inside the housing 100. When the sealing cover 230 is in the first position, the foolproof spring 400 is located in front of the limiting protrusion 231. When the sealing cover 230 is in the second position, the foolproof spring 400 is located behind the limiting protrusion 231. It should be noted that the front and back and the rear are based on the sliding direction of the sealing cover 230. The end of the limiting protrusion 231 near the part of the housing 100 used to install the button bracket 210 is bent at a certain angle toward the sealing cover 230. When the sealing cover 230 slides from the first station to the second station, the limiting protrusion 231 can squeeze the anti-fooling spring 400, causing the anti-fooling spring 400 to deform, thus making it easier for the limiting protrusion 231 to pass over the anti-fooling spring 400. After the limiting protrusion 231 leaves, the anti-fooling spring 400 releases its elasticity, returns to its initial state, and abuts against the surface of the limiting protrusion 231, thereby restricting the sealing cover 230 from sliding from the second station to the first station and ensuring the sealing effect of the sealing cover 230. Furthermore, as shown in Figure 1, a silicone pad 240 may be provided on the side of the sealing cover 230 facing the housing 100. The silicone pad 240 may be annular and fixed to the sealing cover 230. As an optional implementation, the sealing cover 230 and the silicone pad 240 may be an injection-molded integral structure, thereby ensuring that the silicone pad 240 will not fall off or deform during the sliding process of the sealing cover 230 relative to the housing 100.Referring again to Figures 10 and 11, when the sealing cover 230 is in the second position, the silicone pad 240 can be arranged around the opening 1111 at the bottom of the mounting groove 111. At this time, the side surface of the silicone pad 240 facing away from the sealing cover 230 abuts against the bottom of the mounting groove 111, so that the sealing cover 230 and the housing 100 form an interference seal by compressing the silicone pad 240, further ensuring the sealing effect. At the same time, after the sealing cover 230 covers the mounting groove 111, the housing 100 can also have a complete shape, which is beneficial to improving the aesthetics of the product. 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 present invention. Thus, 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. A button module for a patch-type drug delivery pump, the patch-type drug delivery pump comprising a housing and an injection needle assembly located inside the housing, characterized in that, The button module includes an injection needle button and a button bracket; a mounting groove is provided on one side of the housing, and the bottom of the mounting groove has an opening to communicate with the interior of the housing; the button bracket is snapped into the mounting groove; a mounting hole is provided on the side of the button bracket away from the housing, the injection needle button passes through the mounting hole and the opening, and the injection needle button can move relative to the button bracket along the axial direction of the mounting hole; wherein the surface of the injection needle button is provided with a first damping ring and a second damping ring distributed circumferentially along the mounting hole, the first damping ring and the second damping ring are arranged along the axial direction of the mounting hole, and a first buckle is provided on the inner wall of the mounting hole; when the button module is in the initial state, the first buckle is snapped between the first damping ring and the second damping ring; when the button module moves toward the interior of the housing to inject the injection needle assembly, the first damping ring is located on the side of the first buckle facing the housing.

2. The button module according to claim 1, characterized in that, There are multiple first buckles, and the majority of the first buckles are evenly and spaced apart around the mounting hole in the circumference.

3. The button module according to claim 2, characterized in that, The first buckle has a guide surface on the side opposite to the inner wall of the mounting hole, and the guide surface is used to guide the injection needle button moving toward the inside of the housing.

4. The button module according to claim 2, characterized in that, The first damping ring includes multiple first annular protrusions, which are circumferentially spaced around the mounting hole, and each first annular protrusion corresponds to each first buckle. The second damping ring includes multiple second annular protrusions, which correspond to each first annular protrusion.

5. The button module according to claim 1, characterized in that, The inner wall of the mounting hole also Multiple second latches are provided, evenly distributed around the mounting hole circumferentially; each second latch is located on the side of the housing opposite to the first latch, and each second latch abuts against the injection needle button.

6. The button module according to claim 1, characterized in that, The button bracket has multiple third buckles on one side facing the housing, and the housing has snap-fit ​​holes that correspond one-to-one with the multiple third buckles. Each third buckle is engaged with the corresponding snap-fit ​​hole.

7. The button module according to claim 1, characterized in that, The button bracket is detachably connected to the housing. The button module also includes a sealing cover plate, which is connected to the housing and can slide relative to the housing so that the sealing cover plate covers the groove of the mounting slot.

8. The button module according to claim 7, characterized in that, The housing is provided with a foolproof spring clip, which is used to fix the sealing cover plate and the housing relative to each other when the sealing cover plate is closed in the mounting groove.

9. The button module according to claim 7, characterized in that, A silicone pad is provided on the side of the sealing cover facing the mounting groove, and the silicone pad abuts against the bottom of the mounting groove; the silicone pad has a ring structure, and when the sealing cover is closed on the mounting groove, the silicone pad is arranged circumferentially around the opening.

10. A patch-type drug delivery pump, characterized in that, The device includes a housing, an injection needle assembly, and a button module as described in any one of claims 1 to 9, wherein the injection needle assembly is located inside the housing, and the button module is used to drive the injection needle assembly to inject the indwelling needle into the user's body.

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