Patch-type drug delivery device

Abstract

The present invention relates to a patch-type drug delivery device, comprising a housing, a storage and delivery mechanism, a needle hub, an injection needle, an operating component, an elastic component, and a first guide component. An accommodating cavity is formed inside the housing; a distal side of the housing close to the skin of a user is configured to be attached to the surface of the skin of the user; the storage and delivery mechanism is configured to store a liquid drug and delivery the same to the injection needle; the first guide component is configured to extend between a distal end close to the skin of the user and a proximal end away from the skin of the user; the needle hub is sleeved on the periphery of the first guide component; and the elastic component is arranged between the housing and the needle hub. According to the present invention, under the action of an elastic restoring force from the elastic component, the needle hub can be automatically removed from the skin together with the injection needle, the removal operation is convenient and fast, and since the needle hub drives the injection needle to move between the distal end and the proximal end, the injection needle can be removed perpendicular to the surface of the skin, thereby preventing secondary damage to the skin.

Description

[0001] A patch-type drug delivery device

[0002] Technical Field

[0003] This invention relates to the field of medical devices, specifically to a patch-type drug delivery device.

[0004] Background Technology

[0005] 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. However, existing patch-type infusion devices require auxiliary tools for removal, making the process cumbersome and increasing the risk of secondary skin damage from the injection needle during removal.

[0006] Summary of the Invention

[0007] This invention provides a patch-type drug delivery device.

[0008] Specifically, the present invention is achieved through the following technical solution:

[0009] This invention 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 guiding component. The housing has an internal receiving 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 drug solution to the injection needle. The first guiding 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 guiding 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 gradually stores elastic energy. When the needle hub is locked between the distal and proximal directions by the operating component, the elastic component is in a stored elastic 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, driving the needle hub to retract the injection needle proximally.

[0010] In some embodiments, a stop is provided at the proximal end of the first guiding member.

[0011] In some embodiments, the distal end of the guide member is connected to the housing.

[0012] 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.

[0013] 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.

[0014] In some embodiments, the needle hub is fitted with a first guide member in the central region of 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.

[0015] 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.

[0016] 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, so as to enable 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.

[0017] In some embodiments, the cylindrical outer periphery of the pusher is provided with a radially outwardly extending first claw, 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 claw, so as to be suitable for the first claw to cooperate with the retaining ring to achieve locking, and the first claw to cooperate with the first groove to achieve unlocking.

[0018] 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 first pawl and the first groove are opposite each other.

[0019] According to the present invention, the distal side of the housing is applied to the user's skin surface. By simply pressing the operating component between the distal and proximal directions, the needle hub can be driven to deliver the injection needle into the skin. The operating component locks the injection needle inside the skin for drug delivery. When it is necessary to disassemble the infusion set, the operating component only needs to be unlocked. Under the elastic restoring force of the elastic component, the needle hub and the injection needle can be automatically removed from the skin. The removal operation is convenient and quick. Furthermore, since the needle hub can move the injection needle between the distal and proximal directions, the injection needle can be removed perpendicular to the skin surface, avoiding secondary damage to the skin.

[0020] 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.

[0021] Attached Figure Description

[0022] 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.

[0023] Figure 1 is a schematic diagram of a patch-type drug delivery device according to an embodiment of the present invention;

[0024] Figure 2 is a first exploded view of a patch-type drug delivery device according to an embodiment of the present invention;

[0025] Figure 3 is a second exploded view of a patch-type drug delivery device according to an embodiment of the present invention;

[0026] Figure 4 is a cross-sectional view of the patch-type drug delivery device in a removed state according to an embodiment of the present invention; Figure 5 is a cross-sectional view of the patch-type drug delivery device in a locked state according to an embodiment of the present invention; Figure 6 is a cross-sectional view of the patch-type drug delivery device in an unlocked state according to an embodiment of the present invention. Reference numerals:

[0027] 10: Operating component; 11: Operating part; 12: Pushing part; 13: First gripper; 14: Protrusion; 15: Spacing; 16: Second gripper;

[0028] 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;

[0029] 30: Storage and transportation mechanism;

[0030] 40: Needle hub; 41: Injection needle; 42: Notch; 43: Groove;

[0031] 50: First guiding component; 51: Stop block;

[0032] 60: Elastic component;

[0033] 70: Hose.

[0034] Detailed Implementation

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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 the embodiments of the present invention at least partially solves the above problems. It should be noted that the patch-type infusion device of the embodiments of the present invention is not limited to the delivery of insulin, but can also be used for the delivery of other medications, including, but not limited to, vitamins, glucose, and saline. As shown in Figures 1-6, the patch-type infusion device of this invention generally includes a housing, a storage and delivery mechanism 30, a needle holder 40, an injection needle 41, an operating component 10, an elastic component 60, a tubing 70, and a first guide component 50. The housing has an internal cavity to accommodate the components of the infusion device. The storage and delivery mechanism 30 stores the medication and delivers it to the injection needle 41 via the tubing 70. The storage and delivery mechanism 30 may include a storage container and a pump element. The storage container is pre-filled with medication, and the pump element is powered by a battery or power source to pump the medication 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... By utilizing its own energy storage and release function, the needle hub 40 is driven to be removed from the skin.

[0039] To facilitate understanding of the structure and working principle of the patch-type drug delivery device in this embodiment of the invention, 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 delivery device in this embodiment of the invention 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.

[0040] The housing of this embodiment of the invention consists of a top shell 21 and a bottom shell 22. The bottom shell 22 is close to the user's skin surface, and 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.

[0041] In this embodiment of the invention, the patch-type infusion device uses an operating component 10 to push the needle seat 40, which in turn moves the injection needle 41 distally to deliver the needle 41. During the needle delivery process, the elastic component 60 gradually stores 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.

[0042] 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.

[0043] To ensure that the movement direction of the needle hub 40 driving the injection needle 41 precisely matches 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.

[0044] 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 screw 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.

[0045] The user 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 in a cylindrical shape to the distal end, using the cylindrical distal end to push the needle holder 40 to move.

[0046] The cylindrical outer periphery 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, thereby providing circumferential limitation for the operating member 10 during the pressing and moving process, and preventing the operating member 10 from rotating.

[0047] 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, and the first pawl 13 and the retaining ring 211 are locked together, thereby realizing the mutual locking between the operating part 10 and the top shell 21.

[0048] A gap 15 is formed near the operating part 11 on the protrusion 14. The position of the gap 15 corresponds to the first pawl 13. At the same time, a first groove 222 is formed on the retaining ring 211. 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.

[0049] 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 part 10 is in the unlocked state, as shown in FIG4, the second claw 16 is locked with the retaining ring 211, preventing the operating part 10 from disengaging from the top shell 21.

[0050] 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.

[0051] 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, and the contour of the notch 42 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. For example, the contours of the second guide member 221 and the notch 42 can be quadrilaterals or other polygons, further providing stable limitation.

[0052] 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.

[0053] 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.

[0054] 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) may also be provided on the inner side of the peripheral wall of the top shell 21.

[0055] In one embodiment, the bottom shell 22 is provided with an adhesive backing 23 on the side closest to the skin surface, facilitating the application of the shell to the skin surface before operating the injection needle 41 to extend and retract it.

[0056] When using the patch-type drug delivery device of this embodiment, the device is first firmly attached to the user's skin surface using the adhesive backing 23. Pressing the operating component 10 drives the needle seat 40 and injection needle 41 to pierce the skin, as shown in Figure 5. The operating component 10 is locked to the top shell 21 by the first claw 13, and the storage and delivery mechanism 30 is activated to deliver the drug solution to the injection needle 41. After the drug solution delivery is completed, the operating component 10 is turned so that the first claw 13 is aligned with the first groove 222, and the protrusion 14 is aligned with the other second groove 223, as shown in Figure 6, thus unlocking the device. The elastic component 60 releases energy to automatically push the operating component 10 out. During the pushing-out process, the first claw 13 moves through the first groove 222 and the protrusion 14 moves through the other second groove 223, causing the injection needle 41 to be removed from the skin, as shown in Figure 4. The entire operation process is convenient and will not cause secondary damage to the skin. The descriptions of the embodiments herein, including any references to directions and orientations, are for ease of description only and should not be construed as limiting the scope of protection of this invention. The description of preferred embodiments involves combinations of features, which may exist independently or in combination; this invention is not particularly limited to the preferred embodiments. The scope of this invention is defined by the claims. The above are merely preferred embodiments of the invention and are not intended to limit the invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

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 distally by the operating component to deliver the injection needle, the elastic component gradually stores elastic energy. When the needle hub is locked between the distal and proximal directions by the operating component, the elastic component is in a stored elastic 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, driving 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 drug delivery device is also provided with a second guide component, which 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 a tubing for 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 to 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 be suitable for the first pawl to cooperate with the retaining ring to achieve locking, and the first pawl to cooperate with the first groove to achieve 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 first pawl and the first groove are opposite each other.

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