A timing control device, method and a wearable drug delivery system

Abstract

This invention relates to the field of devices for introducing media into or onto the human body, and particularly to a timing control device, method, and wearable drug delivery system. It includes a substrate, a needle, a torsion spring, a transmission mechanism, and a control assembly. The needle is slidable relative to the substrate along its length; the torsion spring connects the substrate and the needle, providing power for the sliding of the needle relative to the substrate; the torsion spring of the transmission mechanism is connected to the needle via the transmission mechanism; the control assembly includes a controller, a controlled part, and a control drive mechanism; the controller includes a first control part and a second control part movably disposed relative to the substrate; the controlled part is disposed on the transmission mechanism in conjunction with the controller; the control drive mechanism drives the first and second control parts; when the first control part connects and disconnects from the controlled part sequentially, the needle moves from a first position toward a second position; when the second control part connects and disconnects from the controlled part sequentially, the needle moves from the second position toward the first position.

Description

Technical Field

[0001] This invention relates to the field of devices for introducing media into or onto the human body, and more particularly to a timing control device, method, and wearable drug delivery system. Background Technology

[0002] A wearable drug delivery system (or on-body delivery system) is a miniaturized, intelligent device integrated into the body that can automatically, continuously, or on-demand deliver drugs through the skin or subcutaneous tissue according to a preset program. It typically employs a combination of micro-motors, sensors (such as position sensors and pressure sensors), and a microprocessor. The system uses sensors to provide real-time feedback on the needle position, and the microprocessor controls the forward and reverse rotation and start / stop of the motor, thereby achieving a complete cycle of needle insertion, retention, and withdrawal.

[0003] However, existing wearable drug delivery systems have the following problems:

[0004] The integrated devices, such as motors, sensors, and microprocessors, used to control the timing of the needles, result in high costs. In particular, some wearable drug delivery systems are designed for single use due to strict hygiene requirements, which further increases the financial burden on users. Summary of the Invention

[0005] The purpose of this invention is to provide a timing control device, method, and wearable drug delivery system to solve the problem of high cost caused by too many integrated electronic devices in existing wearable drug delivery systems.

[0006] The technical solution of the present invention is: a timing control device, comprising a substrate, wherein the substrate is provided with:

[0007] The needle tip can be slidably positioned relative to the substrate along its own length.

[0008] A torsion spring connects the base plate and the needle, providing power for the sliding of the needle relative to the base plate.

[0009] The transmission mechanism, wherein the torsion spring is connected to the needle tip via the transmission mechanism;

[0010] The control component includes a controller, a controlled part, and a control drive mechanism; the controller includes a first control part and a second control part that are movably disposed relative to the base plate; the controlled part is disposed on a transmission mechanism in cooperation with the controller; the control drive mechanism is used to drive the first control part and the second control part to operate;

[0011] When the first control unit connects and disconnects from the controlled unit in sequence, the needle moves from the first station toward the second station; when the second control unit connects and disconnects from the controlled unit in sequence, the needle moves from the second station toward the first station.

[0012] Preferably, the transmission mechanism includes a first transmission part and a second transmission part that are engaged with a sliding groove. The needle slides relative to the substrate with the first transmission part, and the second transmission part is rotatably disposed on the substrate around its own axis and connected to a torsion spring.

[0013] Preferably, at least one of the first control unit and the second control unit is configured as a chuck, and the first control unit and / or the second control unit abuts against the anchor point on the controlled unit at different times.

[0014] Preferably, the controlled part includes a semi-annular groove formed on the second transmission part, and the anchor point is configured as an inner wall surface of the semi-annular groove perpendicular to its own rotation direction.

[0015] Preferably, the first control unit and the second control unit are fixedly disposed;

[0016] The controlled part includes an assembly groove, which is parallel to the axis of the second transmission part and has one end penetrating through the end face of the second transmission part, so that the first control part or the second control part can be inserted and engaged with the controlled part along the axial direction of the second transmission part.

[0017] Preferably, limit switches are provided for the first controller and the second controller.

[0018] Preferably, the control drive mechanism includes a drive motor, a gear is coaxially fixed to the actuating end of the drive motor, a rack is fixed to the controller in cooperation with the gear, a guide rail is on the base plate, and the controller meshes with the gear and runs along the guide rail under the drive of the drive motor.

[0019] A timing control device includes a substrate, on which:

[0020] The needle is slidably positioned relative to the substrate along its own length.

[0021] A torsion spring connects the base plate and the needle, providing power for the sliding of the needle relative to the base plate.

[0022] The transmission mechanism includes a first transmission part and a second transmission part that are engaged with a sliding groove. The needle slides relative to the substrate with the first transmission part, and the second transmission part is rotatably disposed on the substrate around its own axis and connected to a torsion spring.

[0023] The controller and control drive mechanism include a first control unit and a second control unit that are movably disposed relative to the base plate and respectively located on both sides of the second transmission unit; the control drive mechanism is used to drive the first control unit and the second control unit to operate.

[0024] The controlled part is disposed on the second transmission part and includes a semi-annular groove and an assembly groove;

[0025] The semi-annular groove is provided in relation to the first control unit, and some of the anchor points are configured as an inner wall surface of the semi-annular groove that is perpendicular to its own rotation direction.

[0026] The assembly groove is provided corresponding to the second control unit. The assembly groove is set parallel to the axis of the second transmission unit, and one end penetrates the end face of the second transmission unit. Some of the anchor points are configured as the inner wall surface of the assembly groove perpendicular to its own rotation direction.

[0027] A timing control method employing a timing control device, comprising:

[0028] When the first control unit is engaged with the assembly slot, the needle is in the first working position;

[0029] The first control unit is driven to separate from the assembly slot, causing the second transmission unit to rotate around its own axis under the drive of the torsion spring, and simultaneously performing the following actions: the first transmission unit, together with the needle, cooperates with the sliding groove of the second transmission unit, causing the needle to move from the first station to the second station; and the second control unit enters the running trajectory of the anchor point;

[0030] As the second transmission unit rotates, the needle is held in the second position when the second control unit is in contact with the inner wall of the semi-annular groove.

[0031] When the second control unit separates from the inner wall of the semi-annular groove, the needle moves from the second station toward the first station.

[0032] A wearable drug delivery system employing a timing control device includes:

[0033] A drug delivery device having a compartment for use with an infusion tube, the compartment being used to hold a medicine bottle, one end of the infusion tube being able to pass through the medicine bottle, and the other end being connected to the needle;

[0034] A medication pump is used to drive the medication in the infusion tubing to flow toward the needle.

[0035] Compared with the prior art, the advantages of the present invention are:

[0036] (1) The present invention uses a mechanical timing control device consisting of a torsion spring, a transmission mechanism and a control component to automatically and sequentially complete the movement of the needle from the first station to the second station without the need for complex electronic sensors and real-time feedback, so as to achieve the complete cycle of needle insertion and retention under the skin and then resetting to achieve needle withdrawal.

[0037] (2) The controller is specifically configured as a first control part and a second control part of a claw structure. The contact between the corresponding first control part or second control part and the anchor point constitutes a simple and solid mechanical locking mechanism, which can reliably stop the transmission mechanism at a specific angle, thereby accurately locking the position of the actuator and ensuring the stability of the "insertion" and "staying" stages during the injection process.

[0038] (3) An assembly groove is added on the basis of the semi-annular groove, and the assembly groove is set to penetrate the end face of the second transmission part, so that the entire transmission mechanism can be directly and conveniently inserted into the controller that has been installed with the base plate along its axial direction, which greatly simplifies the equipment assembly process.

[0039] (4) The control drive mechanism is set to consist of a drive motor, gears and racks. This achieves precise and controllable linear drive of the controller. The speed and position can be easily controlled by the meshing of the gears and racks. In addition, with the reversing switch, high-precision control of the timing switching point is achieved.

[0040] (5) This invention provides a timing control method that utilizes the interaction of mechanical structures to achieve an automated process from "standby" to "insertion and dwell" and then to "reset". This method does not require complex real-time algorithm calculations, but can be achieved solely through the physical interaction of the structures, thus exhibiting high stability and low cost requirements. Attached Figure Description

[0041] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0042] Figure 1 This is an exploded view of the timing control device described in this invention;

[0043] Figure 2 This is a structural diagram of the timing control device described in this invention;

[0044] Figure 3 This is a first-view structural diagram of the transmission mechanism described in this invention;

[0045] Figure 4 This is a second-view structural diagram of the transmission mechanism described in this invention;

[0046] Figure 5 This is a structural diagram of the controller described in this invention;

[0047] Figure 6 This is a first-view structural diagram of the needle tip in the first working position according to the present invention;

[0048] Figure 7 This is a second-view structural diagram of the needle in the first working position according to the present invention;

[0049] Figure 8This is a first-view structural diagram of the needle in the second working position according to the present invention;

[0050] Figure 9 This is a second-view structural diagram of the needle in the second working position according to the present invention;

[0051] Figure 10 This is a first-view structural diagram of the needle in the reset state as described in this invention;

[0052] Figure 11 This is a second-view structural diagram of the needle in the reset state as described in this invention;

[0053] Figure 12 This is a top view of a wearable drug delivery system according to the present invention;

[0054] Among them: 100, timing control device; 1, base plate; 11, insertion rod; 12, guide rail; 2, needle; 3, torsion spring; 4, transmission mechanism; 41, first transmission part; 411, slide rod; 42, second transmission part; 421, slide groove; 5, controller; 51, first control part; 52, second control part; 6, controlled part; 61, semi-annular groove; 62, assembly groove; 7, control drive mechanism; 71, drive motor; 72, gear; 73, rack; 8, reversing switch; 200, drug delivery device; 300, drug pump; 400, medicine bottle. Detailed Implementation

[0055] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more, unless otherwise expressly defined.

[0056] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0057] The present invention will be further described in detail below with reference to specific embodiments:

[0058] like Figure 1 and Figure 2As shown, a timing control device 100 includes a substrate 1, on which a needle 2 is disposed. In this application, the needle 2 can be slidably disposed perpendicular to the substrate 1 along its own length direction, thereby piercing the user's skin to perform injection.

[0059] The power for the needle 2 to move relative to the substrate 1 is provided by the torsion spring 3. The two ends of the torsion spring 3 are connected to the substrate 1 and the needle 2 respectively, so that the needle 2 can move relative to the substrate 1 or has a tendency to move relative to the substrate 1.

[0060] In this embodiment, the torsion spring 3 is connected to the needle 2 through the transmission mechanism 4, which is used to convert the torsional motion of the torsion spring 3 into the translational motion of the needle 2.

[0061] A control component is provided to control the movement of the needle 2 from the first station to the second station, where it pauses for a period of time before returning to the first station. These actions correspond to the three processes in the injection procedure: skin penetration, drug injection, and needle withdrawal. The control component includes a controller 5, a controlled part 6, and a control drive mechanism 7. For example, Figure 5 As shown, the controller 5 includes a first control unit 51 and a second control unit 52 that are movably disposed relative to the base plate 1 under the drive of the control drive mechanism 7. The controlled unit 6 is disposed on the transmission mechanism 4. The first control unit 51 and the second control unit 52 cooperate with the controlled unit 6 in turn, causing the transmission mechanism 4 to stop at different rotation angles, thereby corresponding to the needle 2 being in the corresponding working position. Specifically, as shown... Figures 6-11 As shown:

[0062] When the first control unit 51 is connected to the controlled unit 6, the needle 2 is kept in the first working position, i.e., the standby state.

[0063] When the first control unit 51 separates from the controlled unit 6, the needle 2 moves from the first station to the second station in an insertion action, during which it can pierce the user's skin.

[0064] When the second control unit 52 is connected to the controlled unit 6, the needle 2 is held in the second position under the user's skin, thereby injecting the drug into the user's body.

[0065] When the second control unit 52 separates from the controlled unit 6, the needle 2 returns to the first station to achieve needle extraction.

[0066] In a preferred embodiment of this application, such as Figure 3 and Figure 4As shown, the transmission mechanism 4 includes a first transmission part 41 and a second transmission part 42 with a sliding groove. The needle 2 is fixed on the first transmission part 41. The first transmission part 41 is inserted into a rod 11 fixed on the substrate 1 and can slide along the length of the rod 11, so that the rotation angle of the first transmission part 41 relative to the substrate 1 is fixed, and only the lifting and lowering movement relative to the substrate 1 is retained. The second transmission part 42 is rotatably connected to the substrate 1 around its own axis. The second transmission part 42 is sleeved on the outside of the first transmission part 41 and is engaged with the sliding groove of the first transmission part 41. The torsion spring 3 is sleeved on the outer wall of the second transmission part 42, and the controlled part 6 is disposed on the second transmission part 42. When the second transmission part 42 rotates around its own axis under the action of the torsion spring 3, it engages with the sliding groove of the first transmission part 41, causing the first transmission part 41 to perform lifting and lowering movement.

[0067] The specific manner in which the first transmission part 41 and the second transmission part 42 are coupled by the following: a slide rod 411 is provided on the outer wall of the first transmission part 41, and a slide groove 421 that mates with the slide rod 411 is formed on the inner wall of the second transmission part 42. When the second transmission part 42 rotates around its own axis, the slide rod 411 slides within the slide groove 421, causing the first transmission part 41 to move up and down relative to the second transmission part 42. Furthermore, the slide rod 411 can also be replaced by a roller or a protrusion.

[0068] Based on this concept, in other embodiments of this application, the second transmission part 42 can also be embedded in the inner wall of the first transmission part 41, and the torsion spring 3 can also be disposed in the inner wall of the second transmission part 42, so that the torsion spring 3 can act on the second transmission part 42 and the second transmission part 42 can cooperate with the sliding groove of the first transmission part 41.

[0069] like Figure 5 As shown, in a preferred embodiment of this application, both the first control unit 51 and the second control unit 52 are configured as claws. The first control unit 51 and / or the second control unit 52 abut against the anchor point on the controlled unit 6 at different times. This locking action stops the rotational movement of the second transmission unit 42. Depending on the different positions of the first control unit 51 and the second control unit 52 relative to the second transmission unit 42, the second transmission unit 42 stops at different angles, thereby corresponding to different working positions of the needle 2. In this case, the anchor point can be configured as a slot, a protrusion, or other structure that can engage with the claw.

[0070] In other embodiments of this application, the first control unit 51 and / or the second control unit 52 may also be configured as a friction plate, the controlled unit 6 is configured as a friction disc mounted on the outer wall of the second transmission unit 42, and the controller 5 is frictionally connected to the controlled unit 6 to realize braking of the second transmission unit 42.

[0071] like Figures 3-11As shown, in a preferred embodiment of this application, the controlled part 6 includes a semi-annular groove 61 formed on the second transmission part 42, so that it has at least one inner wall surface perpendicular to its own rotation direction, and the inner wall surface can be used as an anchor point to abut against the first control part 51 or the second control part 52, thereby fixing the rotation angle of the second transmission part 42.

[0072] Furthermore, the first control unit 51 and the second control unit 52 are fixed to each other and integrally formed, forming a C-shaped structure. In order to ensure that at any given time, one of the first control unit 51 and the second control unit 52 is located on the movement trajectory of the anchor point, the distance between the adjacent end faces of the first control unit 51 and the second control unit 52 is less than the outer diameter of the second transmission unit 42. Based on this, to avoid the inconvenience caused by the semi-annular groove 61, which is closed in the length direction at the end, requiring the transmission mechanism 4 to be inserted along its own axis while simultaneously moving radially during assembly with the controller 5.

[0073] In a preferred embodiment of this application, the controlled part 6 further includes an assembly groove 62, which is opened parallel to the axis of the second transmission part 42, with one end connected to the semi-annular groove 61 and the other end penetrating through the end face of the second transmission part 42. The assembly groove 62, which connects to the bottom end face of the second transmission part, allows the transmission mechanism 4 to be inserted and engaged with the first control part 51 or the second control part 52 that is correspondingly mounted on the substrate 1 along its own axial direction.

[0074] The assembly groove 62 has two configuration options: one end, away from the end face of the second transmission component, is connected to or not connected to the semi-annular groove 61. When the assembly groove 62 is connected to the semi-annular groove 61, the manufacturing steps of the second transmission component can be reduced. When the assembly groove 62 is not connected to the semi-annular groove 61, both ends of the semi-annular groove 61 remain closed along its length, which can improve the structural stability of the second transmission component.

[0075] In order to accurately control the stroke of the controller 5 driven by the control drive mechanism 7, in a preferred embodiment of this application, a reversing switch 8 is provided corresponding to the first controller 5 and the second controller 5. When the first controller 5 or the second controller 5 comes into contact with the corresponding reversing switch 8, the control drive mechanism 7 will stop running and be configured to run in the opposite direction to before stopping after restarting.

[0076] Regarding the control drive mechanism 7, in a preferred embodiment of this application, such as Figure 1As shown, the control drive mechanism 7 includes a drive motor 71 disposed perpendicular to the substrate 1. A gear 72 is coaxially fixed to the actuating end of the drive motor 71. A rack 73 capable of meshing with the gear 72 is fixed on the connecting section between the first control unit 51 and the second control unit 52. A guide rail 12 is disposed on the substrate 1. The controller 5 is disposed parallel to the substrate 1, meshes with the gear 72, and is slidably disposed in the guide rail 12, allowing it to run along the guide rail 12 in contact with the substrate 1 under the drive of the drive motor 71. In other embodiments of this application, the control drive mechanism 7 may also be composed of a pair of electromagnets, with the pair of electromagnets respectively corresponding to the first control unit 51 and the second control unit 52, driving the controller 5 to move via electromagnetic force. The control drive mechanism 7 may also be a double-stroke cylinder.

[0077] refer to Figures 1-11 When the torsion spring 3 is tightened, the first control unit 51 abuts against the mounting groove 62, and the needle 2 has not penetrated the substrate 1, the device is in its initial state. Based on this initial state, the operating principle of this application is as follows:

[0078] In the initial state, needle 2 is in the first working position.

[0079] The control drive mechanism 7 moves, causing the first control unit 51 to gradually disengage from the assembly slot 62. Although the second control unit 52 enters the movement trajectory of the anchor point, it does not come into contact with the anchor point. The second transmission unit 42 loses its constraint and rotates around its own axis under the drive of the torsion spring 3. Through the sliding groove, the needle 2 moves from the first station to the second station.

[0080] When the second control unit 52, which is part of the anchor point movement trajectory, comes into contact with the anchor point, the first transmission unit 41 corresponds to the lowest point of the slide groove 421 on the second transmission unit 42, that is, the needle 2 enters the second working position, at which point the medicine is injected into the user's body.

[0081] After sufficient liquid medicine is injected, the control drive mechanism 7 reverses its direction, causing the second control unit 52 to separate from the anchor point. At this time, the second transmission unit 42 loses its constraint again and continues to rotate in the same direction under the action of the torsion spring 3.

[0082] Since the slide 421 is generally V-shaped, the first transmission component, after passing the lowest point of the slide 421, starts to drive the needle 2 to move upward toward the first station and stops after contacting the end of the slide 421, thus realizing the needle extraction process.

[0083] Based on the aforementioned timing control device 100, this application also provides a wearable drug delivery system, such as... Figure 12 As shown, the wearable drug delivery system also includes a housing, a drug delivery device 200, and a drug pump 300.

[0084] The drug delivery device 200 has a compartment for holding a medicine bottle 400. In practical applications, an infusion tube is provided in conjunction with the medicine bottle 400. One end of the infusion tube passes through the medicine bottle 400, and the other end is connected to the needle 2, thus establishing a flow path for the medicine. A medicine pump 300 is connected to the infusion tube to drive the medicine in the infusion tube to flow towards the needle 2.

[0085] When using:

[0086] Connect one end of the infusion tube to the needle 2, and pass the other end of the infusion tube through the medicine bottle 400 containing the medicine solution. Then, put the medicine bottle 400 into the chamber and fix it.

[0087] Then start the medicine pump 300 so that the medicine flows from the infusion tube toward the needle 2.

[0088] The above embodiments are merely illustrative of the technical concept and features of the present invention, intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly, and should not be construed as limiting the scope of protection of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description, and thus all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention.

Claims

1. A timing control device (100), characterized in that, Includes a substrate (1), on which are disposed: The needle (2) is slidably positioned relative to the substrate (1) along its own length direction; A torsion spring (3) connects the base plate (1) and the needle (2) to provide power for the sliding of the needle (2) relative to the base plate (1); The transmission mechanism (4) includes a first transmission part (41) and a second transmission part (42) that are engaged with a slide groove (421). The needle (2) slides relative to the substrate (1) with the first transmission part (41). The second transmission part (42) is rotatably disposed on the substrate (1) around its own axis and connected to the torsion spring (3). The controller (5) and the control drive mechanism (7) include a first control unit (51) and a second control unit (52) that are movably disposed relative to the base plate (1) and respectively disposed on both sides of the second transmission unit (42); the control drive mechanism (7) is used to drive the first control unit (51) and the second control unit (52) to operate; The controlled part (6) is provided on the second transmission part (42) and includes a semi-annular groove (61) and an assembly groove (62) as well as an anchor point for contacting the controller (5); The semi-annular groove (61) is provided corresponding to the first control unit (51), and part of the anchor point is configured as an inner wall surface of the semi-annular groove (61) perpendicular to its own rotation direction; The assembly groove (62) is provided corresponding to the second control unit (52). The assembly groove (62) is provided parallel to the axis of the second transmission unit (42). One end of the assembly groove (62) passes through the end face of the second transmission unit (42). Some of the anchor points are configured as the inner wall surface of the assembly groove (62) perpendicular to its own rotation direction. When the first control unit (51) is connected to the controlled unit (6), the needle (2) is held in the first working position; When the first control unit (51) separates from the controlled unit (6), the needle (2) moves from the first station toward the second station in an insertion action; When the second control unit (52) is connected to the controlled unit (6), the needle (2) is held in the second working position; When the second control unit (52) separates from the controlled unit (6), the needle (2) is reset to the first working position.

2. The timing control device (100) according to claim 1, characterized in that, At least one of the first control unit (51) and the second control unit (52) is configured as a pawl, and the first control unit (51) and / or the second control unit (52) abut against the anchor point on the controlled part (6) at different times.

3. The timing control device (100) according to claim 1, characterized in that, The first control unit (51) and the second control unit (52) are fixedly arranged; The controlled part (6) includes an assembly groove (62) which is parallel to the axis of the second transmission part (42) and has one end penetrating the end face of the second transmission part (42), so that the first control part (51) or the second control part (52) can be inserted and engaged with the controlled part (6) along the axial direction of the second transmission part (42).

4. The timing control device (100) according to claim 3, characterized in that, A reversing switch (8) is provided corresponding to the first control unit (51) and the second control unit (52).

5. A timing control device (100) according to claim 4, characterized in that, The control drive mechanism (7) includes a drive motor (71), and a gear (72) is coaxially fixed at the execution end of the drive motor (71). A rack (73) is fixed on the controller (5) in cooperation with the gear (72). A guide rail (12) is on the base plate (1). The controller (5) meshes with the gear (72) and runs along the guide rail (12) under the drive of the drive motor (71).

6. A timing control method, employing a timing control device (100) as described in any one of claims 1-5, comprising: When the first control unit (51) is engaged with the assembly slot (62), the needle (2) is in the first working position; The first control unit (51) is driven to separate from the assembly slot (62), causing the second transmission unit (42) to rotate around its own axis under the drive of the torsion spring (3), and simultaneously perform the following actions: the first transmission unit (41) together with the needle (2) cooperates with the slide groove (421) of the second transmission unit (42), causing the needle (2) to move from the first station to the second station; and the second control unit (52) enters the running trajectory of the anchor point; As the second transmission unit (42) rotates, when the second control unit (52) remains in contact with the inner wall of the semi-annular groove (61), the needle (2) is held in the second position; When the second control unit (52) separates from the inner wall of the semi-annular groove (61), the needle (2) moves from the second station toward the first station.

7. A wearable drug delivery system, employing a timing control device (100) as described in any one of claims 1-5, comprising: The drug delivery device (200) has a compartment and is used in conjunction with an infusion tube. The compartment is used to hold a medicine bottle (400). One end of the infusion tube can pass through the medicine bottle (400), and the other end is connected to the needle (2). A drug pump (300) is used to drive the drug solution in the infusion tube to flow toward the needle (2).

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