A patch-type medicine delivery device

Abstract

The utility model relates to a kind of pasting type medicine delivery device, including shell, storage and delivery mechanism, needle seat, injection needle, operating part, elastic component and first guide component, shell interior forms accommodating cavity, the distal end side of shell close to user's skin is used to be pasted on user's skin surface, storage and delivery mechanism is used to store and deliver liquid medicine to injection needle, first guide component is set to extend between the distal end direction close to user's skin and the proximal direction away from user's skin, needle seat is sleeved in the outer periphery of first guide component, elastic component is arranged between shell and needle seat.According to the utility model, needle seat can automatically remove needle seat together with injection needle from skin under the elastic recovery force of elastic component, and the operation is convenient and fast, and since needle seat drives injection needle to move between distal end and proximal direction, injection needle can be removed perpendicular to skin surface, to avoid secondary damage to skin.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a patch-type drug delivery device. Background Technology

[0002] Patch-type infusion devices are worn on the skin of areas such as the user's waist or arms. After the injection needle is inserted into the skin, a pump delivers the insulin or other medication stored in the device to the user. The device is then removed from the skin after use. Current patch-type infusion devices require auxiliary tools for removal, making the process cumbersome and potentially causing secondary skin damage during removal. Utility Model Content

[0003] This utility model provides a patch-type drug delivery device.

[0004] Specifically, this utility model is achieved through the following technical solution:

[0005] This utility model provides a patch-type drug delivery device, including a housing, a storage and delivery mechanism, a needle hub, an injection needle, an operating component, an elastic component, and a first guide component. The housing has an internal cavity. The distal end of the housing near the user's skin is used to adhere to the user's skin surface. The storage and delivery mechanism is used to store and deliver the drug solution to the injection needle. The first guide component extends between the distal direction near the user's skin and the proximal direction away from the user's skin. The needle hub is sleeved on the outer periphery of the first guide component. The elastic component is disposed between the housing and the needle hub. When the needle hub is driven by the operating component to deliver the injection needle in the distal direction, the elastic component is gradually elastically energized. When the needle hub is locked between the distal and proximal directions by the operating component, the elastic component is in an elastically energized state. When the needle hub is unlocked between the distal and proximal directions by the operating component, the elastic component gradually releases its elastic restoring force to drive the needle hub to retract the injection needle in the proximal direction.

[0006] In some embodiments, a stop is provided at the proximal end of the first guiding member.

[0007] In some embodiments, the distal end of the guide member is connected to the housing.

[0008] In some embodiments, the housing is configured as a split type, and the housing is provided with an adhesive backing for application to the user's skin surface near the distal end.

[0009] In some embodiments, the elastic member is a coil spring disposed between the needle seat and the housing near the distal end, the coil spring being sleeved on the outer periphery of the first guide member.

[0010] In some embodiments, the needle hub is fitted with a first guide member in a central region in a horizontal direction parallel to the user's skin surface, and the needle hub forms notches on at least two adjacent sides in the horizontal direction. The patch-type infusion device is also provided with a second guide member that extends between the distal and proximal directions and is shaped to fit into the notches.

[0011] In some embodiments, the needle hub is formed with a slot extending in a horizontal direction parallel to the user's skin surface, for connecting the storage and delivery mechanism and the injection needle through the slot and communicating with the injection needle.

[0012] In some embodiments, the operating component is provided with an operating part and a pushing part. The pushing part extends from the operating part toward the distal end in a cylindrical shape. A locking structure that cooperates with and is circumferentially misaligned between the cylindrical outer periphery of the pushing part and the housing is provided to allow the operating component to be rotated relative to the housing in a locked state between the distal and proximal ends by the locking structure, thereby enabling the unlocking of the operating component and the housing.

[0013] In some embodiments, the cylindrical outer periphery of the pusher is provided with a radially outwardly extending first pawl, and the housing is provided with a radially inwardly extending retaining ring at the position of the outer periphery of the operating component. The retaining ring forms a first groove that at least matches the contour of the first pawl, so as to be suitable for the first pawl to cooperate with the retaining ring to achieve locking, and for the first pawl to cooperate with the first groove to achieve unlocking.

[0014] In some embodiments, the cylindrical outer periphery of the pusher is provided with a protrusion extending between the distal and proximal ends, and the retaining ring is formed with a second groove that at least matches the profile of the protrusion. A gap matching the retaining ring is formed between the protrusion and the operating part to allow the retaining ring to pass through the gap, thereby allowing the operating part to be screwed relative to the housing until the position of the first pawl is opposite to the position of the first groove.

[0015] According to this invention, the distal end of the housing is applied to the user's skin. Simply pressing the operating component between the distal and proximal ends drives the needle holder to deliver the injection needle into the skin. The operating component then locks the injection needle inside the skin for drug delivery. When the infusion set needs to be disassembled, simply unlocking the needle holder with the operating component allows the needle holder and injection needle to be automatically removed from the skin under the elastic restoring force of the elastic component. The removal operation is convenient and quick. Furthermore, because the needle holder can move the injection needle between the distal and proximal ends, the injection needle can be removed perpendicular to the skin surface, avoiding secondary damage to the skin.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0018] Figure 1 This is a schematic diagram of a patch-type drug delivery device according to one embodiment of the present invention;

[0019] Figure 2 This is a first exploded view of the patch-type drug delivery device in one embodiment of the present invention;

[0020] Figure 3 This is a second exploded view of the patch-type drug delivery device in one embodiment of the present invention;

[0021] Figure 4 This is a cross-sectional view of the disassembled state of the patch-type drug delivery device in one embodiment of this utility model;

[0022] Figure 5 This is a cross-sectional view of the locked state of the patch-type drug delivery device in one embodiment of the present invention;

[0023] Figure 6 This is a cross-sectional view of the unlocked state of the patch-type drug delivery device in one embodiment of this utility model.

[0024] Figure label:

[0025] 10: Operating component; 11: Operating part; 12: Pushing part; 13: First chuck; 14: Protrusion; 15: Spacing; 16: Second chuck;

[0026] 21: Top shell; 211: Retaining ring; 22: Bottom shell; 221: Second guide component; 222: First groove; 223: Second groove; 224: Partition plate; 225: Rib plate; 23: Adhesive backing;

[0027] 30: Storage and transportation mechanism;

[0028] 40: Needle hub; 41: Injection needle; 42: Notch; 43: Groove;

[0029] 50: First guiding component; 51: Stop block;

[0030] 60: Elastic component;

[0031] 70: Hose. Detailed Implementation

[0032] This disclosure will now be discussed with reference to several embodiments. It should be understood that these embodiments are discussed only to enable those skilled in the art to better understand and thus implement this disclosure, and are not intended to imply any limitation on the scope of this disclosure.

[0033] As used herein, the term "comprising" and its variations are to be interpreted as open-ended terms meaning "including but not limited to"; the terms "embodiment" and "one embodiment" are to be interpreted as "at least one embodiment"; the term "another embodiment" is to be interpreted as "at least one other embodiment"; the terms "first," "second," etc., may refer to different or the same objects; the term "setup" is not limited to direct or indirect connections, nor to specific connection methods. Other explicit and implicit definitions may also be included below.

[0034] Specific numerical values ​​or ranges may be referred to in the following description. It should be understood that these values ​​and ranges are merely exemplary and may be helpful in putting the ideas of this disclosure into practice. However, the description of these examples is not intended to limit the scope of this disclosure in any way. These values ​​or ranges may be set differently depending on the specific application scenario and requirements.

[0035] As mentioned above, existing patch-type infusion devices require auxiliary tools for removal, which is cumbersome and can easily cause secondary damage to the user's skin during removal. The patch-type infusion device proposed in this invention at least partially solves the above problems. It should be noted that the patch-type infusion device of this invention is not limited to insulin delivery; it can also be used for the delivery of other medications, such as, but not limited to, vitamins, glucose, and saline solution. Figures 1-6 As shown, the patch-type drug delivery device of this utility model embodiment generally includes a shell, a storage and delivery mechanism 30, a needle holder 40, an injection needle 41, an operating component 10, an elastic component 60, a flexible tube 70, and a first guide component 50. The shell has an internal cavity for accommodating the various components of the drug delivery device. The storage and delivery mechanism 30 stores the drug solution and delivers it to the injection needle 41 through the flexible tube 70. The storage and delivery mechanism 30 may be equipped with a storage container and a pump element. The storage container is pre-filled with drug solution, and the pump element is powered by a battery or power source to pump the drug solution out of the storage container. The injection needle 41 is fixedly mounted on the needle holder 40, and the needle holder 40 drives the injection needle 41 to move as a whole. The operating component 10 is used by the user to press and twist, driving the needle holder 40 to move. The first guide component 50 guides the needle holder 40 to move precisely in a preset direction. The elastic component 60 uses its own energy storage and release function to drive the needle holder 40 to be removed from the skin.

[0036] To facilitate understanding of the structure and working principle of the patch-type drug infusion device of this utility model embodiment, in the direction perpendicular to the user's skin surface, the side closer to the skin surface is defined as the distal end, and the side farther from the skin surface is defined as the proximal end. When the shell of the patch-type drug infusion device of this utility model is attached to the skin surface, it ensures that the needle hub 40 and the injection needle 41 move accurately between the distal and proximal directions.

[0037] The housing of this embodiment of the utility model consists of a top shell 21 and a bottom shell 22. The bottom shell 22 is close to the user's skin surface, while the top shell 21 is away from the skin surface. A stepped structure is formed at the joint between the top shell 21 and the bottom shell 22, thereby improving the sealing and firmness of the joint. After the top shell 21 and the bottom shell 22 are joined together, they form a receiving cavity. The receiving cavity is provided with a storage and delivery mechanism 30, a needle holder 40, an injection needle 41, an operating component 10, an elastic component 60, a flexible tube 70, a controller (not shown in the figure), a power source (not shown in the figure), etc. For example, the power source can be a battery.

[0038] The patch-type infusion device of this utility model uses the operating component 10 to push the needle seat 40, which in turn moves the injection needle 41 distally to deliver the injection needle 41. During the needle delivery process, the elastic component 60 is gradually charged with energy. When it is necessary to remove the injection needle 41, the pressure applied to the operating component 10 is released, and the elastic component 60 releases energy, pushing the needle seat 40 to move the injection needle 41 proximally to retract the injection needle 41. In one embodiment, the elastic component 60 can be a coil spring as shown in the figure, which is disposed between the needle seat 40 and the bottom shell 22. The coil spring is compressed to store energy. In another embodiment, the elastic component 60 can also be a coil spring disposed between the needle seat 40 and the top shell 21, with both ends hooked onto the needle seat 40 and the top shell 21 respectively. The coil spring is stretched to store energy. In other embodiments, the elastic component 60 can also be a spring sheet, which is bent to store energy.

[0039] A needle 41 is fixedly connected to the needle hub 40. One end of a flexible tube 70 is conductively connected to the needle 41, and the other end of the flexible tube 70 is conductively connected to a storage mechanism. The storage mechanism delivers the medication to the needle 41 through the flexible tube 70. In one embodiment, a slot 43 is formed on the needle hub 40. The width of the slot 43 is close to the diameter of the flexible tube 70, so that the flexible tube 70 can be clamped in the slot 43, preventing the needle hub 40 from detaching from the flexible tube 70 during movement and preventing the flexible tube 70 from tangling. For example, the extension direction of the slot 43 can be a horizontal direction parallel to the skin surface, thereby providing more space for the flexible tube 70.

[0040] To ensure that the movement of the needle hub 40 and the injection needle 41 precisely aligns with the direction perpendicular to the skin surface, a first guide member 50 and a second guide member 221 extending between the distal and proximal directions are provided. In one embodiment, the first guide member 50 passes through the middle region of the needle hub 40. When the operating member 10 applies pressure to the needle hub 40, it ensures that the force is evenly transmitted to the first guide member 50 through the needle hub 40, preventing the needle hub 40 from locking with the first guide member 50 due to tilting during movement. For example, the first guide member 50 is a cylindrical pin, which only provides radial restraint for the needle hub 40.

[0041] In one embodiment, the first guide member 50 can be freely inserted into the needle holder 40, or it can be fixedly connected to the bottom shell 22 at one end near the distal end. For example, one end of the first guide member 50 is fixedly connected to the bottom shell 22 by a threaded connection or welding. In another embodiment, a coil spring is sleeved on the outer periphery of the first guide member 50, and the first guide member 50 provides additional stable support for the coil spring to prevent displacement during the elastic energy storage and release elastic restoring force of the coil spring.

[0042] Users can push, lock, unlock, and release the needle holder 40 and injection needle 41 by pressing and twisting the operating component 10. In one embodiment, the operating component 10 is provided with an operating part 11 and a pushing part 12. The operating part 11 is for the user to press and twist, and the pushing part 12 extends from the operating part 11 to the distal end in a cylindrical shape, using the distal end of the cylindrical shape to push the needle holder 40 to move.

[0043] The outer periphery of the cylindrical part is provided with a protrusion 14 extending between the distal and proximal ends. A retaining ring 211 is formed on the top shell 21. The retaining ring 211 has a second groove 223. The outline and circumferential position of the second groove 223 match the protrusion 14, so that the operating part 10 can be circumferentially limited during the pressing and moving process, and the operating part 10 is prevented from rotating.

[0044] A radially extending first pawl 13 is provided on the outer periphery of the cylindrical part near the operating part 11. When the operating part 10 is pressed and moved to the locked position, the first pawl 13 is elastically compressed radially by the retaining ring 211 and then rebounds. The first pawl 13 and the retaining ring 211 are locked together, thereby realizing mutual locking between the operating part 10 and the top shell 21.

[0045] The protrusion 14 forms a gap 15 near the operating part 11. The position of the gap 15 corresponds to the first pawl 13. At the same time, the retaining ring 211 also forms a first groove 222. The outline of the first groove 222 matches the first pawl 13. The position of the first groove 222 corresponds to the unlocking twist angle, so that when the first pawl 13 and the retaining ring 211 are locked, the operating part 10 can be twisted. In this case, the retaining ring 211 can pass through the gap 15. When the first pawl 13 is twisted to correspond to the position of the first groove 222, the user releases the pressure on the operating part 10. The elastic member 60 releases energy to push the first pawl 13 through the first groove 222, thereby unlocking the operating part 10 from the top shell 21.

[0046] In one embodiment, a radially extending second claw 16 is provided on the outer periphery of the cylindrical part near the distal end. The second claw 16 and the first claw 13 are staggered in the circumferential direction of the cylindrical part, thereby ensuring that when the operating component 10 is in the unlocked state, such as Figure 4As shown, the second claw 16 is locked with the retaining ring 211 to prevent the operating part 10 from detaching from the top shell 21.

[0047] In one embodiment, a stop 51 is provided at one end of the first guide member 50 near its proximal end. The size of the stop 51 is larger than the diameter of the hole opened in the needle holder 40 for the first guide member 50 to pass through, thereby preventing the first guide member 50 from detaching from the needle holder 40.

[0048] In one embodiment, the second guide member 221 is disposed on the horizontal edge region of the needle holder 40. The needle holder 40 has a notch 42 formed in the edge region, the contour of which matches the second guide member 221, allowing the second guide member 221 to be embedded within the notch 42. The second guide member 221 also provides precise guidance for the movement direction of the needle holder 40. Furthermore, because it is disposed on the edge region of the needle holder 40, the second guide member 221 also provides circumferential rotational limitation of the needle holder 40 around the first guide member 50. Exemplarily, the contours of the second guide member 221 and the notch 42 can be quadrilaterals or other polygons, further providing stable limitation.

[0049] In one embodiment, the number of second guide components 221 can be one or more. As shown in the figure, there are two second guide components 221, which are respectively located in two mutually orthogonal edge regions of the needle holder 40. This arrangement can provide circumferential limiting for the needle holder 40 from two orthogonal directions.

[0050] In one embodiment, a partition 224 is also provided on the bottom shell 22. A storage mechanism and a needle holder 40 are respectively provided on both sides of the partition 224. The partition 224 can be closely attached to the side of the needle holder 40 without the notch 42, thereby providing further guidance and limiting for the needle holder 40.

[0051] In one embodiment, stiffeners 225 are provided on the inner side of the peripheral wall of the bottom shell 22 to provide structural reinforcement to the peripheral wall. In another embodiment, stiffeners 225 (not shown in the figure) may also be provided on the inner side of the peripheral wall of the top shell 21.

[0052] In one embodiment, the bottom shell 22 is provided with an adhesive backing 23 on the side close to the skin surface, which facilitates the application of the shell to the skin surface before operating the injection needle 41 to deliver and withdraw the injection needle 41.

[0053] When using the patch-type drug delivery device of this utility model embodiment, first, the drug delivery device is firmly attached to the user's skin surface by applying the adhesive backing 23. Then, pressing the operating component 10 drives the needle seat 40 and the injection needle 41 to pierce the skin. Figure 5As shown, the operating component 10 is locked to the top shell 21 via the first claw 13, activating the storage and delivery mechanism 30 to deliver the medicine to the injection needle 41; after the medicine delivery is completed, the operating component 10 is rotated so that the first claw 13 aligns with the first groove 222, and at the same time the protrusion 14 aligns with the other second groove 223, as shown. Figure 6 As shown, unlocking is achieved; the elastic component 60 releases energy to automatically push out the operating component 10. During the pushing-out process, the first claw 13 moves through the first groove 222 and the protrusion 14 moves through another second groove 223, driving the injection needle 41 to be removed from the skin, as shown. Figure 4 As shown, the entire operation is convenient and will not cause secondary damage to the skin.

[0054] The description of the embodiments herein, including any references to directions and orientations, is for ease of description only and should not be construed as limiting the scope of protection of this utility model. The description of preferred embodiments involves combinations of features, which may exist independently or in combination; this utility model is not particularly limited to the preferred embodiments. The scope of this utility model is defined by the claims.

[0055] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A patch-type drug delivery device, characterized in that, The device includes a housing, a storage and delivery mechanism, a needle hub, an injection needle, an operating component, an elastic component, and a first guide component. The housing has an internal cavity. The distal end of the housing, near the user's skin, is used to adhere to the user's skin surface. The storage and delivery mechanism stores and delivers the medication to the injection needle. The first guide component extends between the distal direction near the user's skin and the proximal direction away from the user's skin. The needle hub is sleeved around the outer periphery of the first guide component. The elastic component is disposed between the housing and the needle hub. When the needle hub is driven by the operating component to deliver the injection needle distally, the elastic component is gradually elastically charged. When the needle hub is locked between the distal and proximal directions by the operating component, the elastic component is in an elastically charged state. When the needle hub is unlocked between the distal and proximal directions by the operating component, the elastic component gradually releases its elastic restoring force to drive the needle hub to retract the injection needle proximally.

2. The patch-type drug delivery device according to claim 1, characterized in that, A stop is provided at the proximal end of the first guiding component.

3. The patch-type drug delivery device according to claim 1, characterized in that, The distal end of the guide component is connected to the housing.

4. The patch-type drug delivery device according to claim 1, characterized in that, The housing is designed as a split type, with an adhesive backing for application to the user's skin near the distal end.

5. The patch-type drug delivery device according to claim 1, characterized in that, The elastic component is a coil spring disposed between the needle seat and the housing near the distal end, and the coil spring is sleeved on the outer periphery of the first guide component.

6. The patch-type drug delivery device according to claim 1, characterized in that, The needle hub has a first guide component fitted in the middle region of a horizontal direction parallel to the user's skin surface, and the needle hub has notches formed on at least two adjacent sides in the horizontal direction. The patch-type infusion device is also provided with a second guide component that extends between the distal and proximal directions and is shaped to fit into the notches.

7. The patch-type drug delivery device according to claim 1, characterized in that, The needle hub has a slot extending horizontally parallel to the user's skin surface, through which the tubing of the infusion mechanism extends and communicates with the needle.

8. The patch-type drug delivery device according to claim 1, characterized in that, The operating component is provided with an operating part and a pushing part. The pushing part extends from the operating part toward the distal end in a cylindrical shape. The outer periphery of the cylindrical pushing part and the housing are provided with a locking structure that cooperates with each other and is circumferentially misaligned. This is suitable for the operating component to be rotated relative to the housing when the operating component and the housing are locked in the distal and proximal directions by the locking structure, thereby enabling the unlocking of the operating component and the housing.

9. The patch-type drug delivery device according to claim 8, characterized in that, The cylindrical outer periphery of the pusher is provided with a radially outwardly extending first pawl, and the housing is provided with a radially inwardly extending retaining ring at the position of the outer periphery of the operating component. The retaining ring forms a first groove that at least matches the contour of the first pawl, so as to facilitate the first pawl and the retaining ring to engage for locking, and the first pawl and the first groove to engage for unlocking.

10. The patch-type drug delivery device according to claim 9, characterized in that, The cylindrical outer periphery of the pusher is provided with a protrusion extending between the distal and proximal ends. The retaining ring is formed with a second groove that at least matches the profile of the protrusion. A gap matching the retaining ring is formed between the protrusion and the operating part to allow the retaining ring to pass through the gap, thereby allowing the operating part to be screwed relative to the housing until the position of the first pawl and the first groove are opposite.

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