Key module and patch type medicine conveying pump

Abstract

The invention relates to the technical field of medical instruments, and discloses a key module and a patch type medicine conveying pump. The key module comprises an injection needle key and a key support. A mounting groove is formed in one side of the shell, an opening is formed in the bottom of the mounting groove, so that the mounting groove is communicated with the interior of the shell, and the key support is clamped in the mounting groove. A mounting hole is formed in the side, away from the shell, of the key support, and the injection needle key penetrates through the mounting hole and the opening and can move in the axis direction of the mounting hole relative to the key support. A first damping ring and a second damping ring are arranged on the surface of the injection needle key, and a first buckle is arranged on the inner wall of the mounting hole. When the key module is in an initial state, the first buckle is clamped between the first damping ring and the second damping ring, and after the key module moves towards the interior of the shell to enable the injection needle assembly to inject needles, the first damping ring is located on the side, facing the shell, of the first buckle. According to the key module, manual needle injection can be achieved, and the effect that the remaining needle is injected in place at a time can be achieved.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to a key module and a patch-type drug delivery pump. Background Art

[0002] Before injecting the medicine into the user's body, the patch-type drug infusion pump needs to first inject the indwelling needle into the user's body, and then inject the medicine into the user's body by injecting it into the indwelling needle. At present, some patch-type drug infusion pumps on the market require the use of auxiliary large syringes for injection. This means that when users use these patch-type drug infusion pumps, they not only have to wear the drug infusion pumps, but also assemble the syringes, which makes the wearing process cumbersome, and the auxiliary syringes also increase costs. Although some patch-type drug infusion pumps use manual injection, users will pause the injection because of pain during the injection, resulting in the indwelling needle being unable to be injected at one time, affecting the user's experience. Summary of the invention

[0003] The present application provides a button module and a patch-type drug infusion pump, which can not only realize manual injection and reduce costs, but also achieve the effect of injecting the indwelling needle into place at one time.

[0004] In a first aspect, the present application provides a key module, which is applied to a patch-type drug infusion pump, wherein the patch-type drug infusion pump comprises a housing and an injection needle assembly located inside the housing, and the key module comprises an injection needle key and a key bracket;

[0005] A mounting groove is provided on one side of the housing, and an opening is provided at the bottom of the mounting groove so that the mounting groove is connected with the interior of the housing, and the button bracket is clamped in the mounting groove;

[0006] The button bracket is provided with a mounting hole on one side away from the housing, the injection needle button is inserted 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

[0007] The surface of the injection needle button is provided with a first damping ring and a second damping ring distributed along the circumference of the mounting hole, the first damping ring and the second damping ring are arranged along the axial direction of the mounting hole, and the inner wall of the mounting hole is provided with a first buckle;

[0008] When the button module is in an initial state, the first buckle is clamped between the first damping ring and the second damping ring. When the button module moves toward the inside of the shell to inject the injection needle assembly, the first damping ring is located on the side of the first buckle facing the shell.

[0009] The button module provided in the present application is used to install the injection needle button on the housing of the patch-type drug infusion pump through a button bracket, and the injection needle button can move toward the inside of 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 arranged on the surface of the injection needle button, and a first buckle is arranged on the button bracket. When the injection needle button is in the initial state, the first buckle is clamped between the first damping ring and the second damping ring. At this time, the end of the injection needle button located in the housing can be in contact with the injection needle assembly. When the user manually presses the injection needle button, under the blocking effect of the first buckle, the injection needle button moves at least the dimension of the first buckle along the axial direction of the mounting hole toward the inside of the housing, so that the first damping ring passes over the first buckle, and the injection needle button can be effectively moved. In 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 the present application can design the dimension of the first buckle along the axial direction of the mounting hole, so that when the user presses the injection needle button, the indwelling needle is injected in place at one time, thereby improving the user experience. Therefore, the button module in the present application can not only realize manual injection, but also achieve the effect of injecting the indwelling needle into place at one time.

[0010] In some possible implementations, there are multiple first buckles, and the majority of the first buckles are evenly and spacedly distributed around the circumference of the mounting hole.

[0011] In some possible implementation schemes, a side of the first buckle facing away from the inner wall of the mounting hole has a guide surface, and the guide surface is used to guide the injection needle button moving toward the inside of the shell.

[0012] In some possible implementations, the first damping ring includes a plurality of first annular protrusions, the plurality of first annular protrusions are spaced apart around the circumference of the mounting hole, and each first annular protrusion is disposed in one-to-one correspondence with each first buckle;

[0013] The second damping ring includes a plurality of sections of second annular protrusions, and the plurality of sections of second annular protrusions are arranged in one-to-one correspondence with the plurality of sections of first annular protrusions.

[0014] In some possible implementations, the inner wall of the mounting hole is further provided with a plurality of second buckles, and the plurality of second buckles are evenly distributed around the circumference of the mounting hole;

[0015] The second buckle is located at a side of the first buckle away from the housing, and each of the second buckles abuts against the injection needle button.

[0016] In some possible implementation schemes, a plurality of third buckles are provided on a side of the button bracket facing the shell, and the shell is provided with connecting holes corresponding to the plurality of third buckles one by one, and each of the third buckles is engaged with the corresponding connecting hole.

[0017] In some possible implementation schemes, the button bracket and the shell are detachably connected, and the button module also includes a sealing cover plate, which is connected to the shell and can slide relative to the shell so that the sealing cover plate covers the notch of the installation slot.

[0018] In some possible implementation schemes, a fool-proof spring sheet is provided in the shell, and the fool-proof spring sheet is used to relatively fix the sealing cover plate and the shell when the sealing cover plate is covered in the mounting groove.

[0019] In some possible implementation schemes, a silicone pad is provided on one side of the sealing cover plate facing the mounting groove, and the silicone pad abuts against the bottom of the mounting groove;

[0020] The silicone pad is an annular structure. When the sealing cover plate is covered on the mounting groove, the silicone pad is arranged around the circumference of the opening.

[0021] In a second aspect, the present application provides a patch-type drug infusion pump, comprising a shell, an injection needle assembly and a button module as described in any possible implementation scheme in the first aspect, wherein the injection needle assembly is located inside the shell, and the button module is used to drive the injection needle assembly to inject an indwelling needle into the user's body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of an exploded structure of a patch-type drug delivery pump in an embodiment of the present application;

[0023] Figure 2 This is a partial structural cross-sectional view of a key module in an embodiment of the present application;

[0024] Figure 3 This is a cross-sectional view of the patch-type drug delivery pump in the initial state in the embodiment of the present application;

[0025] Figure 4 A schematic diagram of the structure of a key support in an embodiment of the present application;

[0026] Figure 5 A schematic diagram of the structure of the injection needle button in the embodiment of the present application;

[0027] Figure 6 This is a structural schematic diagram of the button bracket from another perspective in the embodiment of the present application;

[0028] Figure 7 This is a schematic diagram of the structure of the patch-type drug delivery pump in the embodiment of the present application when the button module is removed;

[0029] Figure 8 for Figure 7A schematic diagram of the structure in which the middle sealing cover plate covers the mounting groove;

[0030] Fig. 9 A cross-sectional view of the sealing cover plate and the front shell in the embodiment of the present application;

[0031] Fig.10 This is a cross-sectional view of the sealing cover plate of the patch-type drug delivery pump in the embodiment of the present application when it is in the first working position;

[0032] Fig.11 for Fig.10 Cross-sectional view of the middle sealing cover plate in the second working position.

[0033] In the figure:

[0034] 100-shell; 110-front shell; 111-mounting slot; 1111-opening; 120-rear shell; 200-button module; 210-button bracket; 211-mounting part; 2111-first mounting plate; 2112-second mounting plate; 212-mounting hole; 2121-first buckle; 21211-guide surface; 2122-second buckle; 213-third buckle; 220-injection needle button; 221-first damping ring; 2211-first annular protrusion; 222-second damping ring; 2221-second annular protrusion; 230-sealing cover plate; 231-limiting protrusion; 240-silicone pad; 300-injection needle assembly; 310-injection needle bracket; 320-drug guide tube; 400-anti-foolproof spring. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] refer to Figure 1 The patch-type drug infusion pump in the embodiment of the present application may include a housing 100, a button module 200, and an injection needle assembly 300, wherein the housing 100 may include a front housing 110 and a rear housing 120, and the front housing 110 and the rear housing 120 may be mutually buckled, so that the interior of the housing 100 has an accommodation space, and the accommodation space is used to place the injection needle assembly 300. The button module 200 is disposed on the front housing 110, and the button module 200 may be used to provide a driving force to the injection needle assembly 300 in the housing 100, so that the injection needle assembly 300 can inject the indwelling needle into the user's body.

[0037] like Figure 1As shown, the key module 200 may include a key bracket 210, an injection needle key 220 and a sealing cover 230. The key bracket 210 and the sealing cover 230 are both connected to the front shell 110, and the injection needle key 220 is installed on the key bracket 210. Figure 1 and Figure 2 The button bracket 210 may include a mounting portion 211 and a mounting hole 212. A mounting groove 111 adapted to the shape of the mounting portion 211 is provided on the side of the front shell 110 facing away from the rear shell 120, so that the mounting portion 211 can be accommodated in the mounting groove 111, and each side edge of the mounting portion 211 can abut against the inner wall of the mounting groove 111, so that the button bracket 210 can maintain a good positioning effect with the mounting groove 111.

[0038] The mounting hole 212 is connected to the side of the mounting portion 211 away from the mounting groove 111, the axial direction of the mounting hole 212 is consistent with the injection direction of the injection needle assembly 300, and the bottom of the mounting groove 111 has an opening 1111, the opening 1111 can be used to connect the mounting groove 111 with the interior of the housing 100, and the mounting hole 212 is directly opposite to the opening 1111. One end of the injection needle button 220 is inserted through the mounting hole 212 and the opening 1111, and extends into the interior of the housing 100. The injection needle assembly 300 may include an injection needle bracket 310 and a drug guide tube 320, the indwelling needle is located in the drug guide tube 320, the drug guide tube 320 is connected to the injection needle bracket 310, and the injection needle button 220 can contact the injection needle bracket 310. The injection button 220 can move relative to the mounting hole 212 along the axis of the mounting hole 212 toward the inside of the housing 100 to drive the injection bracket 310 to move, so that the injection bracket 310 can drive the indwelling needle in the drug guiding tube 320 to enter the user's body.

[0039] refer to Figure 2 and Figure 3The injection needle button 220 is provided with a first damping ring 221 and a second damping ring 222 on one end surface of the installation hole 212. The first damping ring 221 is located on the side of the second damping ring 222 away from the housing 100. The first damping ring 221 and the second damping ring 222 are arranged around the circumference of the installation hole 212, and the first damping ring 221 and the second damping ring 222 are arranged along the axial direction of the installation hole 212, and are arranged at intervals. The inner wall of the installation hole 212 may be provided with a first buckle 2121. When the injection needle button 220 is in the initial state, the first buckle 2121 is clamped between the first damping ring 221 and the second damping ring 222. At this time, in the absence of external force, under the cooperation of the first buckle 2121, the first damping ring 221 and the second damping ring 222, the injection needle button 220 and the button bracket 210 remain relatively fixed. When the user manually presses down the injection needle button 220, a large driving force can be applied to the injection needle button 220, and the driving force can drive the injection needle button 220 to move toward the inside of the housing 100, so that the first damping ring 221 moves to the side of the first buckle 2121 facing the housing 100. It should be understood that in this process, when the injection needle button 220 moves, the injection needle assembly 300 is driven to inject needles. Since in the initial state, the first buckle 2121 is clamped between the first damping ring 221 and the second damping ring 222, in order 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 the dimension of the first buckle 2121 along the axial direction of the mounting hole 212 at one time, so that the injection needle button 220 can obtain an effective pressing injection effect. In this way, the dimension of the first buckle 2121 along the axial direction of the mounting hole 212 can be designed so that the injection of the first damping ring 221 is completed after passing over the first buckle 2121 , thereby achieving a one-time injection effect on the basis of manual injection.

[0040] In some embodiments, reference Figure 4 and Figure 5 There can be multiple first buckles 2121, and the multiple first buckles 2121 are evenly and spacedly distributed around the axis direction of the mounting hole 212, so that the injection needle button 220 and the button bracket 210 are balanced in force, ensuring that the injection needle bracket 310 can move along the axis direction of the mounting hole 212. Based on this, the first damping ring 221 may include a first annular protrusion 2211 arranged at multiple intervals, and the second damping ring 222 may include a second annular protrusion 2221 arranged at multiple intervals, wherein the first buckle 2121, the first annular protrusion 2211 and the second annular protrusion 2221 are arranged one by one, and the arc sizes of the first buckle 2121, the first annular protrusion 2211 and the second annular protrusion 2221 along the circumference of the mounting hole 212 can also be the same, so as to achieve a better damping effect.

[0041] Further, refer again to Figure 2A guide surface 21211 may be provided on one side of the first buckle 2121 away from the inner wall of the mounting hole 212, and the guide surface 21211 may be used to guide the injection needle button 220 moving toward the inside of the housing 100. Figure 2 As shown, there is a certain angle between the guide surface 21211 and the inner wall of the mounting hole 212, and the angle range is between 0 and 90 degrees, so that the guide surface 21211 is inclined compared to the inner wall of the mounting hole 212. In addition, the end of the guide surface 21211 close to 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, so that the first damping ring 221 can more easily pass over the first buckle 2121.

[0042] In addition, as an optional embodiment, reference Figure 5 The cross section of the first annular protrusion 2211 may be a conical structure. When the first buckle 2121 is clamped between the first annular protrusion 2211 and the second annular protrusion 2221, the lower surface of the first annular protrusion 2211 may be as close to the guide surface 21211 of the first buckle 2121 as possible, so as to improve the clamping effect between the two. Similarly, the cross section of the second annular protrusion 2221 may also be a conical structure. 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 buckle 2121 and clamp the first buckle 2121 between the first damping ring 221 and the second damping ring 222.

[0043] It is worth noting that when the first damping ring 221 and the second damping ring 222 are designed as a segmented structure, it is not only convenient to control the resistance value of the first damping ring 221 and the second damping ring 222, but also convenient to produce. Similarly, the segmented design of the plurality of first buckles 2121 can also facilitate the control of the resistance value of the first buckles 2121 and facilitate production.

[0044] In some embodiments, reference Figure 2 or Figure 4The inner wall of the mounting hole 212 is located on the side of the first buckle 2121 away from the housing 100 and may be provided with a plurality of second buckles 2122, which are evenly distributed around the circumference of the mounting hole 212. When the injection needle button 220 is inserted into the mounting hole 212, the second buckle 2122 is located on the side of the first damping ring 221 away from the first buckle 2121, and each second buckle 2122 can abut against the surface of the injection needle button 220, so that the plurality of second buckles 2122 cooperate to limit the injection needle button 220 in the circumferential direction of the mounting hole 212, so as to prevent the injection needle button 220 from tilting, and thus the injection needle button 220 can only move 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, and each second clip 2122 can correspond to 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 be connected with the first clips 2121, which simplifies the assembly of the injection needle button 220 and the button bracket 210 and saves time and effort.

[0045] In addition, the design of the first damping ring 221, the second damping ring 222, the first clip 2121 and the second clip 2122 in this embodiment can also limit the injection needle button 220, so that the injection needle button 220 can be coaxial with the injection needle bracket 310, thereby avoiding the center position offset between the two during transportation, affecting the injection effect.

[0046] For reference Figure 3 and Figure 6 The mounting portion 211 may be substantially 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 portion 211 is snapped into the mounting groove 111, the part mounted outside the mounting groove 111 may be attached to the side wall surface of the front shell 110. Specifically, the mounting portion 211 may be considered to include a first mounting plate 2111 and a second mounting plate 2112, and the first mounting plate 2111 and the second mounting plate 2112 may be an integrated design, the first mounting plate 2111 is directly opposite to the large surface of the front shell 110, and the second mounting plate 2112 is directly opposite to the side wall of the front shell 110.

[0047] A plurality of third buckles 213 may be provided on the side of the mounting portion 211 facing the housing 100, wherein at least one third buckle 213 is provided on the second mounting plate 2112, and the remaining third buckles 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 be directly opposite to the side wall of the rear housing 120. In this case, the third buckles 213 provided on the second mounting plate 2112 are located at the portion where the second mounting plate 2112 is directly opposite to the side wall of the rear housing 120. The rear housing 120 may be provided with a snap-fitting hole (not shown in the figure) corresponding to the third buckle 213 on the second mounting plate 2112, so that the third buckle 213 on the second mounting plate 2112 can be snapped into the snap-fitting hole of the rear housing 120, thereby ensuring that the key bracket 210 is relatively fixed to the housing 100 in the height direction of the housing 100. In addition, the front shell 110 may be provided with a snap-in hole (not shown in the figure) corresponding one-to-one to the third snap-in 213 on the first mounting plate 2111, so that the third snap-in 213 on the first mounting plate 2111 can be snapped into the snap-in hole of the front shell 110, thereby ensuring the relative fixation between the button bracket 210 and the shell 100, and further ensuring that the position of the injection needle button 220 is fixed during use.

[0048] It should be understood that in this embodiment, the button bracket 210 is mounted on the housing 100 by means of buckling with the buckle and the buckling hole, and it is also convenient to remove the button bracket 210 from the housing 100 after the needle injection is completed. In other words, the button bracket 210 and the housing 100 in this embodiment are detachably connected. Specifically, when removing the button bracket 210, the second mounting plate 2112 can be opened relative to the housing 100 first, so that the third buckle 213 on the second mounting plate 2112 is separated from the corresponding buckling hole. Then pull the injection needle button 220 upward. Since the first damping ring 221 of the injection needle button 220 is located below the first buckle 2121 at this time, when the injection needle button 220 is pulled upward, the first damping ring 221 contacts the bottom of the first buckle 2121, but the first damping ring 221 cannot cross the first buckle 2121 and return to the state where the first damping ring 221 is located above the first buckle 2121. Therefore, the injection needle button 220 and the button bracket 210 are relatively fixed at this time. Continuing to pull the injection needle button 220 upward can make the third buckle 213 on the first mounting plate 2111 disengage from the corresponding snap-in hole, thereby allowing the injection needle button 220 and the button bracket 210 to be removed from the shell 100 as a whole.

[0049] refer to Figure 7 and Figure 8, the sealing cover plate 230 can be connected to the front shell 110. When the button bracket 210 is removed from the shell 100, the sealing cover plate 230 can slide relative to the front shell 110, so as to cover the notch of the mounting groove 111, so that the interior of the shell 100 is sealed to ensure the subsequent injection effect. For example, the opposite sides of the sealing cover plate 230 in this embodiment can be respectively connected to the side walls of the mounting groove 111, and the sealing cover plate 230 can be slidably connected to the side walls of the mounting groove 111 through a slider structure, so as to achieve relative sliding between the sealing cover plate 230 and the mounting groove 111. In addition, the sealing cover plate 230 can also be connected to the shell 100 through a spring. When the button bracket 210 is installed on the shell 100, the sealing cover plate 230 is in the first position, and the button bracket 210 abuts against the sealing cover plate 230. At this time, the spring is in a compressed state, so that the sealing cover plate 230 has a tendency to slide relative to the shell 100. When the button bracket 210 is removed, the elastic force of the spring is released to drive the sealing cover plate 230 to slide to the second position, so that the sealing cover plate 230 covers the installation groove 111 .

[0050] As an optional implementation, when the sealing cover plate 230 covers the mounting groove 111, the spring is still in a compressed state, which allows the sealing cover plate 230 to have a tendency to slide further forward relative to the housing 100, thereby improving the covering effect between the sealing cover plate 230 and the mounting groove 111.

[0051] Of course, in some other embodiments, the sealing cover 230 can be slidably connected to the side wall of the installation groove 111 through a slider structure. After removing the button bracket 210, the user can also manually push the sealing cover 230 to slide so that the sealing cover 230 covers the installation groove 111.

[0052] Based on this, refer to Figures 9 to 11, a limiting protrusion 231 may be provided on the side of the sealing cover plate 230 facing the housing 100, and a foolproof spring sheet 400 may be provided inside the housing 100. When the sealing cover plate 230 is in the first position, the foolproof spring sheet 400 is located in front of the limiting protrusion 231, and when the sealing cover plate 230 is in the second position, the foolproof spring sheet 400 is located behind the limiting protrusion 231. It should be noted that the front and back and the back here are based on the sliding direction of the sealing cover plate 230. One end of the limiting protrusion 231 close to the housing 100 for installing the key bracket 210 is bent to a certain angle toward the sealing cover plate 230. When the sealing cover plate 230 slides from the first position to the second position, the limiting protrusion 231 can squeeze the foolproof spring sheet 400, so that the foolproof spring sheet 400 is deformed, so that the limiting protrusion 231 can pass over the foolproof spring sheet 400. After the limiting protrusion 231 leaves, the foolproof spring piece 400 releases its elastic force, returns to its initial state, and abuts against the surface of the limiting protrusion 231, thereby limiting the sealing cover plate 230 from sliding from the second station toward the first station, thereby ensuring the sealing effect of the sealing cover plate 230.

[0053] Furthermore, if Figure 1 As shown, a silicone pad 240 may be provided on the side of the sealing cover plate 230 facing the housing 100. The silicone pad 240 may be an annular structure and fixed on the sealing cover plate 230. As an optional embodiment, the sealing cover plate 230 and the silicone pad 240 may be an injection-molded integrated structure, thereby ensuring that the silicone pad 240 will not fall off or deform from the sealing cover plate 230 during the sliding process of the sealing cover plate 230 relative to the housing 100. Fig.10 and Fig.11 When the sealing cover plate 230 is in the second position, the silicone pad 240 can be arranged around the opening 1111 at the bottom of the installation groove 111. At this time, the side surface of the silicone pad 240 facing away from the sealing cover plate 230 abuts against the bottom of the installation groove 111, so that an interference seal is formed between the sealing cover plate 230 and the housing 100 by squeezing the silicone pad 240, further ensuring the sealing effect. At the same time, after the sealing cover plate 230 covers the installation groove 111, the housing 100 can also be made into a complete shape, which is conducive to improving the aesthetics of the product.

[0054] Obviously, those skilled in the art can make various changes and modifications 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 is also intended to include these modifications and variations.

Claims

1. A key module applied to a patch-type drug infusion pump, the patch-type drug infusion pump comprising a housing and an injection needle assembly located inside the housing, characterized in that: The key module includes an injection needle key and a key bracket; A mounting groove is provided on one side of the housing, and an opening is provided at the bottom of the mounting groove so that the mounting groove is connected with the interior of the housing, and the button bracket is clamped in the mounting groove; The button bracket is provided with a mounting hole on one side away from the housing, the injection needle button is inserted 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 along the circumference of the mounting hole, the first damping ring and the second damping ring are arranged along the axial direction of the mounting hole, and the inner wall of the mounting hole is provided with a first buckle; When the button module is in an initial state, the first buckle is clamped between the first damping ring and the second damping ring. When the button module moves toward the inside of the shell to inject the injection needle assembly, the first damping ring is located on the side of the first buckle facing the shell.

2. The key module according to claim 1, characterized in that: There are a plurality of first buckles, and the plurality of first buckles are evenly and spacedly distributed around the circumference of the mounting hole.

3. The key module according to claim 2, characterized in that: The first buckle has a guide surface on one side facing away from 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 shell.

4. The key module according to claim 2, characterized in that: The first damping ring comprises a plurality of first annular protrusions, the plurality of first annular protrusions are spaced around the circumference of the mounting hole, and each first annular protrusion is arranged in one-to-one correspondence with each first buckle; The second damping ring includes a plurality of sections of second annular protrusions, and the plurality of sections of second annular protrusions are arranged in one-to-one correspondence with the plurality of sections of first annular protrusions.

5. The key module according to claim 1, characterized in that: The inner wall of the mounting hole is further provided with a plurality of second buckles, and the plurality of second buckles are evenly distributed around the circumference of the mounting hole; The second buckle is located at a side of the first buckle away from the housing, and each of the second buckles abuts against the injection needle button.

6. The key module according to claim 1, characterized in that: A plurality of third buckles are provided on one side of the button bracket facing the shell, and the shell is provided with buckling holes corresponding to the plurality of third buckles one by one, and each of the third buckles is buckled in the corresponding buckling hole.

7. The key module according to claim 1, characterized in that: The button bracket is detachably connected to the shell, and the button module further comprises a sealing cover plate, which is connected to the shell and can slide relative to the shell so that the sealing cover plate covers the notch of the installation slot.

8. The key module according to claim 7, characterized in that: An anti-foolproof spring sheet is arranged in the shell, and the anti-foolproof spring sheet is used to relatively fix the sealing cover plate and the shell when the sealing cover plate is covered in the mounting groove.

9. The key module according to claim 7, characterized in that: A silicone pad is provided on one side of the sealing cover plate facing the mounting groove, and the silicone pad abuts against the bottom of the mounting groove; The silicone pad is an annular structure. When the sealing cover plate is covered on the mounting groove, the silicone pad is arranged around the circumference of the opening.

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

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