Drug delivery device

Abstract

The invention provides a drug delivery device. The drug delivery device comprises a shell, a drug infusion piece, an injection piece, a sensing module and a processing unit. The medicine infusion piece is arranged in the shell. The injection piece is arranged in the shell and connected to the medicine infusion piece. The sensing module is arranged in the shell and is configured to sense the state of the medicine infusion piece and the state of the injection piece. The processing unit is disposed in the housing and coupled to the sensing module. When the processing unit responds to the sensing module and judges that the medicine infusion piece is filled with liquid medicine, the processing unit selectively controls the injection piece to be exposed out of the shell.

Description

Technical Field

[0001] The invention relates to a drug delivery device, in particular to a drug delivery device capable of ensuring injection safety. Background Art

[0002] The drug delivery device is used to inject liquid medicine into the human body based on medical procedures. During the injection procedure of the drug delivery device, some operating actions may affect the injection safety of the human body, such as whether the infusion tube is filled with liquid medicine, whether the drug delivery device is placed on the human body, whether the injection needle is exposed from the drug delivery device or hidden in the drug delivery device, whether there are bubbles in the infusion tube, etc. Therefore, how to ensure injection safety has become a major design issue. Summary of the invention

[0003] The present invention provides a drug delivery device capable of ensuring injection safety to solve the above problems.

[0004] According to one embodiment, the drug delivery device of the present invention comprises a housing, a drug infusion piece, an injection piece, a sensing module and a processing unit. The drug infusion piece is disposed in the housing. The injection piece is disposed in the housing and connected to the drug infusion piece. The sensing module is disposed in the housing and configured to sense the states of the drug infusion piece and the injection piece. The processing unit is disposed in the housing and coupled to the sensing module. When the processing unit responds to the sensing module and determines that a drug liquid is filled in the drug infusion piece, the processing unit selectively controls the injection piece to be exposed from the housing.

[0005] In one embodiment, when the processing unit determines that the drug solution has been exhausted from the drug infusion part in response to the sensing module, the processing unit controls the injection part to be hidden in the housing.

[0006] In one embodiment, the injection piece is movably disposed in the housing, and the processing unit controls the injection piece to move relative to the housing so as to be exposed from the housing or hidden in the housing.

[0007] In one embodiment, the shell includes a shielding member, which is movably disposed relative to the injection member, and the processing unit controls the shielding member to move relative to the injection member so that the injection member is exposed from or hidden in the shielding member.

[0008] In one embodiment, the drug delivery device further comprises a safety detection member movably disposed in the housing. The sensing module is configured to sense the state of the safety detection member. When the processing unit responds to the sensing module and determines that the safety detection member is hidden in the housing, the processing unit first controls the drug to be injected into the drug infusion member, and then controls the injection member to be exposed from the housing.

[0009] In one embodiment, when the processing unit determines that the safety detection component is exposed from the housing in response to the sensing module, the processing unit controls the injection component to be hidden in the housing.

[0010] In one embodiment, when the housing is placed on an object and the security detection component faces the object, the object forces the security detection component to be hidden in the housing.

[0011] In one embodiment, when the housing is moved away from the object, the safety detection element is automatically exposed from the housing.

[0012] In one embodiment, the safety detection component surrounds the injection component.

[0013] In one embodiment, when the housing is moved away from the object, the safety detection element is automatically exposed from the housing and self-locked.

[0014] In one embodiment, the sensing module includes at least one optical sensor configured to sense light quantity related to at least one of the drug infusion component, the injection component, and the safety detection component.

[0015] In one embodiment, the sensing module includes an optical sensor, and the drug infusion component, the safety detection component, and the injection component are arranged along an optical axis of the optical sensor.

[0016] In one embodiment, the sensing module includes two optical sensors, and one of the drug infusion component, the safety detection component and the injection component is arranged along the optical axis of one of the two optical sensors, and the other two of the drug infusion component, the safety detection component and the injection component are arranged along the optical axis of the other of the two optical sensors.

[0017] In one embodiment, the drug delivery device further includes a motor, which is disposed in the housing, coupled to the processing unit, and configured to inject the drug solution into the drug infusion part. The sensing module is configured to sense a current number of revolutions of the motor. When the current number of revolutions is less than or equal to a first predetermined number of revolutions, the processing unit determines that the drug delivery device is in an injection-in-progress stage. When the current number of revolutions is greater than the first predetermined number of revolutions, the processing unit determines that the drug delivery device is in a ready-to-stop stage.

[0018] In one embodiment, when the drug delivery device is in the injection-in-progress stage and the sensing module senses that there is at least one bubble in the drug infusion part, the processing unit determines that the drug infusion part is leaking.

[0019] In one embodiment, the drug delivery device further comprises an alarm unit, which is disposed in the housing and coupled to the processing unit. When the processing unit determines that the drug infusion part leaks, the processing unit controls the alarm unit to sound an alarm.

[0020] In one embodiment, when the drug delivery device is in the preparation stop stage and the sensing module senses the presence of at least one bubble in the drug infusion part, the processing unit determines whether the percentage of the at least one bubble in the drug solution in a time period is greater than a threshold value. When the percentage of the at least one bubble in the drug solution in the time period is greater than the threshold value, the processing unit determines that the injection procedure of the drug delivery device has been completed and controls the motor to stop.

[0021] In one embodiment, when the percentage of the at least one bubble in the liquid medicine during the time period is less than or equal to the threshold, the motor continues to operate until the current rotation speed reaches a second predetermined rotation speed that is greater than the first predetermined rotation speed.

[0022] In one embodiment, the sensing module includes two optical sensors, the drug infusion piece is arranged along an optical axis of one of the two optical sensors, and a rotating portion of the motor is arranged along an optical axis of the other of the two optical sensors.

[0023] According to one embodiment, the drug delivery device of the present invention comprises a housing, a drug infusion part, a motor, a sensing module and a processing unit. The drug infusion part is disposed in the housing. The motor is disposed in the housing and is configured to inject a drug solution into the drug infusion part. The sensing module is disposed in the housing and is configured to sense the state of the drug infusion part and sense a current number of revolutions of the motor. The processing unit is disposed in the housing and is coupled to the motor and the sensing module. When the current number of revolutions is greater than a first predetermined number of revolutions, the processing unit determines that the drug delivery device is in a ready-to-stop stage. When the drug delivery device is in the ready-to-stop stage and the sensing module senses that there is at least one bubble in the drug infusion part, the processing unit determines whether the percentage of the at least one bubble in the drug solution within a time period is greater than a threshold value. When the percentage of the at least one bubble in the drug solution within the time period is greater than the threshold value, the processing unit determines that the injection procedure of the drug delivery device has been completed and controls the motor to stop.

[0024] In one embodiment, when the percentage of the at least one bubble in the liquid medicine during the time period is less than or equal to the threshold, the motor continues to operate until the current rotation speed reaches a second predetermined rotation speed that is greater than the first predetermined rotation speed.

[0025] In one embodiment, when the current number of revolutions is less than or equal to the first predetermined number of revolutions, the processing unit determines that the drug delivery device is in an injection-in-progress stage. When the drug delivery device is in the injection-in-progress stage and the sensing module senses the presence of at least one bubble in the drug infusion part, the processing unit determines that the drug infusion part is leaking.

[0026] In one embodiment, the drug delivery device further comprises an alarm unit, which is disposed in the housing and coupled to the processing unit. When the processing unit determines that the drug infusion part leaks, the processing unit controls the alarm unit to sound an alarm.

[0027] In one embodiment, the sensing module includes two optical sensors, the drug infusion piece is arranged along an optical axis of one of the two optical sensors, and a rotating portion of the motor is arranged along an optical axis of the other of the two optical sensors.

[0028] In summary, the drug delivery device of the present invention utilizes a sensing module to sense the status of a drug infusion part, an injection part, and / or a safety detection part, and then individually or in combination identifies corresponding operation actions (e.g., whether the drug infusion part is filled with liquid medicine, whether the drug delivery device is placed on the human body, whether the injection part is exposed from the drug delivery device or hidden in the drug delivery device, and / or whether there are bubbles in the drug infusion part), so that the processing unit of the drug delivery device can execute a corresponding safety mechanism to ensure the safety of injection of the human body. In addition, the sensing module can sense the current number of revolutions of a motor configured to inject liquid medicine into the drug infusion part, and then determine whether the drug delivery device is in the injection in progress stage or in the preparation to stop stage. Then, the processing unit of the drug delivery device can determine whether the drug infusion part is leaking during the injection in progress stage, or determine whether the injection procedure of the drug delivery device has been completed during the preparation to stop stage, and then execute a corresponding safety mechanism to ensure the safety of injection of the human body.

[0029] The advantages and spirit of the present invention can be further understood through the following detailed description of the invention and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 FIG. 4 is a schematic diagram of a drug delivery device according to an embodiment of the present invention.

[0031] Figure 2 It is a schematic diagram of placing the housing of the drug delivery device on an object.

[0032] Figure 3 This is a schematic diagram showing that the drug liquid is filled in the drug infusion part and the injection part is exposed from the housing.

[0033] Figure 4 FIG. 4 is a schematic diagram of a drug delivery device according to an embodiment of the present invention.

[0034] Figure 5 This is a schematic diagram showing that the drug liquid is filled in the drug infusion part and the injection part is exposed from the housing.

[0035] Figure 6 FIG. 4 is a schematic diagram of a drug delivery device according to an embodiment of the present invention.

[0036] Figure 7 It is a schematic diagram of placing the housing of the drug delivery device on an object.

[0037] Figure 8 This is a schematic diagram showing that the drug liquid is filled in the drug infusion part and the injection part is exposed from the housing.

[0038] Fig. 9 FIG. 4 is a schematic diagram of a drug delivery device according to an embodiment of the present invention.

[0039] Fig.10 It is a schematic diagram of placing the housing of the drug delivery device on an object.

[0040] Fig.11 This is a schematic diagram showing that the drug liquid is filled in the drug infusion part and the injection part is exposed from the housing.

[0041] Fig.12 It is a schematic diagram of the safety detection element automatically emerging from the housing and self-locking.

[0042] Fig.13 FIG. 4 is a schematic diagram of a drug delivery device according to an embodiment of the present invention.

[0043] Fig.14 FIG. 4 is a schematic diagram of a drug delivery device according to an embodiment of the present invention.

[0044] The reference numerals are described as follows:

[0045] 1,2,4,6,7,8: Drug delivery devices

[0046] 3:Object

[0047] 5:Medicine

[0048] 10,70: Shell

[0049] 12,72: Drug infusion parts

[0050] 14: Injection parts

[0051] 16,76:Sensor module

[0052] 18,78: Processing unit

[0053] 20: Shielding

[0054] 22: Security Detection Item

[0055] 74: Motor

[0056] 80: Alarm unit

[0057] 160,160a,160b,760a,760b: Optical sensor

[0058] 740: Rotating part

[0059] A,A1,A2,A3,A4: Optical axis DETAILED DESCRIPTION

[0060] See also Figures 1 to 3 , Figure 1 is a schematic diagram of a drug delivery device 1 according to an embodiment of the present invention, Figure 2 is a schematic diagram of the housing 10 of the drug delivery device 1 being placed on an object 3, Figure 3 It is a schematic diagram showing that the drug solution 5 is filled in the drug infusion part 12 and the injection part 14 is exposed from the housing 10 .

[0061] like Figures 1 to 3 As shown, the drug delivery device 1 includes a housing 10, a drug infusion component 12, an injection component 14, a sensing module 16 and a processing unit 18, wherein the drug infusion component 12, the injection component 14, the sensing module 16 and the processing unit 18 are all disposed in the housing 10. The injection component 14 is connected to the drug infusion component 12, so that the drug solution 5 (such as Figure 3 In the present embodiment, a motor (not shown in the figure) may be disposed in the housing 10 and configured to inject the drug solution 5 into the drug infusion part 12. It should be noted that how the motor injects the drug solution 5 into the drug infusion part 12 is well known to those skilled in the art and will not be described in detail herein. In the present embodiment, the drug infusion part 12 may be a drug infusion tube or a similar component, and the injection part 14 may be an injection needle or a similar component.

[0062] The sensing module 16 is configured to sense the states of the drug infusion member 12 and the injection member 14. In the present embodiment, the sensing module 16 may include two optical sensors 160a, 160b, wherein one of the drug infusion member 12 and the injection member 14 is arranged along the optical axis A1 of one of the two optical sensors 160a, 160b, and the other of the drug infusion member 12 and the injection member 14 is arranged along the optical axis A2 of the other of the two optical sensors 160a, 160b. Figures 1 to 3 As shown, the drug infusion part 12 can be arranged along the optical axis A1 of the optical sensor 160a, and the injection part 14 can be arranged along the optical axis A2 of the optical sensor 160b. The optical sensors 160a and 160b can be reflective photoelectric sensors, but are not limited to this. In practical applications, the reflective photoelectric sensor can be composed of a light emitting diode (LED) that emits light and a detector that receives reflected light from an object. It should be noted that the working principle of the reflective photoelectric sensor is well known to existing technicians and will not be repeated here.

[0063] like Figure 1 and Figure 2 As shown, when the drug infusion part 12 is not filled with the drug liquid 5 or is filled with the drug liquid 5, the optical sensor 160a can sense different amounts of reflected light relative to the drug infusion part 12, so that the processing unit 18 can distinguish different states of the drug infusion part 12. Figure 2 and Figure 3 As shown, when the injection piece 14 is hidden in the housing 10 or exposed from the housing 10, the optical sensor 160b can sense different amounts of reflected light relative to the injection piece 14, so that the processing unit 18 can distinguish different states of the injection piece 14. It should be noted that the amount of reflected light can be obtained by a variety of techniques, such as: (1) selection of materials or elements (e.g., liquids), including material chemistry, color, opacity, surface texture and / or surface chemistry; (2) stacking order of elements for reflection; (3) distance between the element and the sensor; and (4) the presence or absence of all or part of the functional structure / element in the sensing area / range.

[0064] The processing unit 18 is coupled to the sensing module 16. In this embodiment, the processing unit 18 may be coupled to the sensing module 16 via a circuit layout (eg, a circuit board, not shown in the figure). In practical applications, the processing unit 18 may be a processor or controller having a data processing function.

[0065] Before the drug delivery device 1 starts to perform the injection procedure, the drug infusion part 12 is not filled with any drug solution, and the injection part 14 is hidden in the housing 10. Figure 1 When a user wants to use the drug delivery device 1 to perform an injection procedure, the user can first place the housing 10 of the drug delivery device 1 on an object 3 (eg, a human body). Figure 2 As shown. Then, the motor can drive the drug solution 5 to be injected into the drug infusion part 12. At this time, the injection part 14 is still hidden in the housing 10 to prevent the injection part 14 from hurting the user. When the processing unit 18 responds to the sensing module 16 and determines that the drug infusion part 12 is filled with drug solution 5, the processing unit 18 will selectively control the injection part 14 to be exposed from the housing 10. Figure 3 As shown, since the drug infusion part 12 is filled with liquid medicine 5, the processing unit 18 controls the injection part 14 to be exposed from the housing 10 to perform the injection procedure. Further, when the injection part 14 is exposed from the housing 10, the injection part 14 will penetrate into the object 3, so that the liquid medicine 5 in the drug infusion part 12 can be delivered to the object 3 through the injection part 14.

[0066] When the processing unit 18 determines that the drug solution 5 has been exhausted from the drug infusion part 12 in response to the sensing module 16, it means that the injection process of the drug delivery device 1 has been completed. At this time, the processing unit 18 controls the injection part 14 to be hidden in the housing 10. Thereby, when the user removes the housing 10 of the drug delivery device 1 from the object 3, the user will not be harmed by the injection part 14.

[0067] In this embodiment, the injection member 14 is movably disposed in the housing 10. Therefore, the processing unit 18 can control the injection member 14 to move relative to the housing 10 and to be exposed from the housing 10 or hidden in the housing 10, such as Figure 2 and Figure 3 In practical applications, the injection member 14 can be driven by a driving mechanism (not shown in the figure) including a motor and a transmission structure (eg, a connecting rod, a gear, etc.).

[0068] See also Figure 4 as well as Figure 5 , Figure 4 is a schematic diagram of a drug delivery device 2 according to an embodiment of the present invention, Figure 5 It is a schematic diagram showing that the drug solution 5 is filled in the drug infusion part 12 and the injection part 14 is exposed from the housing 10 .

[0069] The main difference between the drug delivery device 2 and the above-mentioned drug delivery device 1 is that the housing 10 of the drug delivery device 2 includes a shielding member 20, such as Figure 4 and Figure 5 The shielding member 20 is movably disposed relative to the injection member 14. Therefore, the processing unit 18 can control the shielding member 20 to move relative to the injection member 14, so that the injection member 14 is exposed from the shielding member 20 of the housing 10 or hidden in the shielding member 20 of the housing 10. In practical applications, the shielding member 20 can be driven by a driving mechanism (not shown in the figure) including a motor and a transmission structure (e.g., a connecting rod, a gear, etc.).

[0070] In this embodiment, the shielding member 20 may be arranged along the optical axis A2 of the optical sensor 160b. Therefore, when the shielding member 20 moves to hide the injection member 14 in the shielding member 20 or to be exposed from the shielding member 20, the optical sensor 160b may sense different amounts of reflected light relative to the shielding member 20, so that the processing unit 18 can distinguish different states of the injection member 14.

[0071] Before the drug delivery device 2 starts to perform the injection procedure, the drug infusion part 12 is not filled with any drug solution, and the injection part 14 is hidden in the shielding part 20 of the housing 10, as shown in FIG. Figure 4As shown. When the user wants to use the drug delivery device 2 to perform an injection procedure, the user can first place the shell 10 of the drug delivery device 2 on an object 3 (for example, a human body). Then, the above-mentioned motor can drive the drug solution 5 to be injected into the drug infusion part 12. At this time, the injection part 14 is still hidden in the shielding part 20 of the shell 10 to prevent the injection part 14 from hurting the user. When the processing unit 18 responds to the sensing module 16 and determines that the drug infusion part 12 is filled with drug solution 5, the processing unit 18 will selectively control the injection part 14 to be exposed from the shell 10. Further, the processing unit 18 will control the shielding part 20 to move so that the injection part 14 is exposed from the shielding part 20 of the shell 10. As shown Figure 5 As shown, the injection piece 14 will penetrate into the object 3 so that the drug liquid 5 in the drug infusion piece 12 can be transported to the object 3 through the injection piece 14 .

[0072] When the processing unit 18 responds to the sensing module 16 and determines that the drug solution 5 has been exhausted from the drug infusion part 12, it means that the injection procedure of the drug delivery device 2 has been completed. At this time, the processing unit 18 controls the shielding member 20 to move so that the injection member 14 is hidden in the shielding member 20 of the housing 10. In this way, when the user removes the housing 10 of the drug delivery device 2 from the object 3, the user will not be harmed by the injection member 14. In this embodiment, after the injection procedure of the drug delivery device 2 is completed, when the shielding member 20 is exposed from the housing 10 (such as Figure 4 The shielding member 20 can be self-locked by the self-locking mechanism at the same time. The self-locking mechanism can be realized by the principle of an automatic ballpoint pen or a similar mechanism, which is well known to the prior art and will not be described in detail here. When the shielding member 20 is self-locked, the shielding member 20 cannot be pushed into the housing 10 again. Therefore, no matter the injection member 14 is exposed from the housing 10 or hidden in the housing 10, the injection member 14 will be hidden in the shielding member 20.

[0073] See also Figures 6 to 8 , Figure 6 is a schematic diagram of a drug delivery device 4 according to an embodiment of the present invention, Figure 7 is a schematic diagram of a housing 10 of a drug delivery device 4 being placed on an object 3, Figure 8 It is a schematic diagram showing that the drug solution 5 is filled in the drug infusion part 12 and the injection part 14 is exposed from the housing 10 .

[0074] The main difference between the drug delivery device 4 and the above-mentioned drug delivery device 1 is that the drug delivery device 4 further includes a safety detection member 22, which is movably disposed in the housing 10. Figures 6 to 8 In this embodiment, the safety detection element 22 can be any mechanism related to activation, such as a device body sensor, a container sensor, etc.

[0075] In this embodiment, the sensing module 16 is further configured to sense the state of the safety detection element 22, and the safety detection element 22 can be arranged along the optical axis A2 of the optical sensor 160b. Therefore, when the safety detection element 22 moves and is hidden in the housing 10 or exposed from the housing 10, the optical sensor 160b can sense different amounts of reflected light relative to the safety detection element 22, so that the processing unit 18 can distinguish different states of the safety detection element 22.

[0076] In the present embodiment, the drug infusion member 12 is arranged along the optical axis A1 of the optical sensor 160a, and the injection member 14 and the safety detection member 22 are arranged along the optical axis A2 of the optical sensor 160b. However, in another embodiment, one of the drug infusion member 12, the safety detection member 22 and the injection member 14 may be arranged along the optical axis of one of the two optical sensors 160a, 160b, and the other two of the drug infusion member 12, the safety detection member 22 and the injection member 14 may be arranged along the optical axis of the other of the two optical sensors 160a, 160b. In other words, the arrangement of the drug infusion member 12, the safety detection member 22 and the injection member 14 relative to the two optical sensors 160a, 160b may be determined according to the actual application.

[0077] Before the drug delivery device 4 starts to perform the injection procedure, the drug infusion component 12 is not filled with any drug solution, the injection component 14 is hidden in the housing 10, and the safety detection component 22 is exposed from the housing 10. Figure 6 When a user wants to use the drug delivery device 4 to perform an injection procedure, the user can first place the housing 10 of the drug delivery device 4 on an object 3 (e.g., a human body). Figure 7 When the housing 10 is placed on the object 3 and the safety detection element 22 faces the object 3, the object 3 will force the safety detection element 22 to hide in the housing 10. When the processing unit 18 responds to the sensing module 16 and determines that the safety detection element 22 is hidden in the housing 10, the processing unit 18 will first control the injection of the drug 5 into the drug infusion part 12, and then control the injection part 14 to be exposed from the housing 10, as shown in FIG. Figure 8 At this time, the injection piece 14 will penetrate into the object 3, so that the drug solution 5 in the drug infusion piece 12 can be transported to the object 3 through the injection piece 14.

[0078] When the drug solution 5 is exhausted from the drug infusion part 12, the user can remove the housing 10 of the drug delivery device 4 from the object 3. When the housing 10 is moved away from the object 3, the safety detection part 22 can be automatically exposed from the housing 10. In this embodiment, an elastic member (for example, a spring, not shown in the figure) can be arranged relative to the safety detection part 22, so that the elastic member can be compressed by the safety detection part 22 and provide elastic force to reset the safety detection part 22. When the processing unit 18 responds to the sensing module 16 and determines that the safety detection part 22 is exposed from the housing 10, the processing unit 18 will control the injection part 14 to be hidden in the housing 10, such as Figure 6 As shown. Thereby, when the user removes the housing 10 of the drug delivery device 4 from the object 3, the user will not be harmed by the injection part 14.

[0079] See also Figures 9 to 12 , Fig. 9 is a schematic diagram of a drug delivery device 8 according to an embodiment of the present invention, Fig.10 is a schematic diagram of a housing 10 of a drug delivery device 8 being placed on an object 3, Fig.11 is a schematic diagram showing that the drug solution 5 is filled in the drug infusion part 12 and the injection part 14 is exposed from the housing 10. Fig.12 It is a schematic diagram showing that the safety detection element 22 is automatically exposed from the housing 10 and is self-locked.

[0080] The main difference between the drug delivery device 8 and the above-mentioned drug delivery device 4 is that the safety detection member 22 of the drug delivery device 8 surrounds the injection member 14, such as Figures 9 to 12 In this embodiment, the safety detection member 22 may be formed as a hollow tube or a hollow block surrounding the injection member 14. In this embodiment, the drug infusion member 12 is arranged along the optical axis A1 of the optical sensor 160a, and the injection member 14 and the safety detection member 22 are arranged along the optical axis A2 of the optical sensor 160b.

[0081] Before the drug delivery device 8 starts to perform the injection procedure, the drug infusion component 12 is not filled with any drug solution, the injection component 14 is hidden in the housing 10, and the safety detection component 22 is exposed from the housing 10. Fig. 9 When a user wants to use the drug delivery device 8 to perform an injection procedure, the user can first place the housing 10 of the drug delivery device 8 on an object 3 (e.g., a human body). Fig.10 When the housing 10 is placed on the object 3 and the safety detection element 22 faces the object 3, the object 3 will force the safety detection element 22 to hide in the housing 10. When the processing unit 18 responds to the sensing module 16 and determines that the safety detection element 22 is hidden in the housing 10, the processing unit 18 will first control the injection of the drug 5 into the drug infusion part 12, and then control the injection part 14 to be exposed from the housing 10, as shown in FIG. Fig.11 At this time, the injection piece 14 will penetrate into the object 3, so that the drug solution 5 in the drug infusion piece 12 can be transported to the object 3 through the injection piece 14.

[0082] When the drug solution 5 is exhausted from the drug infusion part 12, the user can remove the housing 10 of the drug delivery device 8 from the object 3. Fig.12As shown, when the housing 10 moves away from the object 3, the safety detection member 22 can automatically be exposed from the housing 10 and self-locked. In this embodiment, an elastic member (e.g., a spring, not shown in the figure) can be arranged relative to the safety detection member 22, so that the elastic member can be compressed by the safety detection member 22 and provide elastic force to reset the safety detection member 22. In addition, when the safety detection member 22 is automatically exposed from the housing 10, the safety detection member 22 can be self-locked by a self-locking mechanism at the same time. The self-locking mechanism can be realized by the principle of an automatic ballpoint pen or a similar mechanism, which is well known to the prior art and will not be repeated here. In one embodiment, when the safety detection member 22 is self-locked, the safety detection member 22 cannot be pushed into the housing 10 again, so no matter whether the injection member 14 is exposed from the housing 10 or hidden in the housing 10, the injection member 14 will be hidden in the safety detection member 22. Thereby, when the user removes the housing 10 of the drug delivery device 8 from the object 3, the user will not be harmed by the injection member 14.

[0083] See also Fig.13 , Fig.13 FIG. 6 is a schematic diagram of a drug delivery device 6 according to an embodiment of the present invention.

[0084] The main difference between the drug delivery device 6 and the above-mentioned drug delivery device 4 is that the sensing module 16 of the drug delivery device 6 includes a single optical sensor 160 , and the drug infusion component 12 , the safety detection component 22 and the injection component 14 are all arranged along the optical axis A of the optical sensor 160 .

[0085] Therefore, according to the above embodiment, the sensing module 16 may include at least one optical sensor configured to sense the light intensity of at least one of the drug infusion component 12, the injection component 14 and the safety detection component 22, depending on the actual application. Fig.13 The embodiment shown can also be applied to Figures 1 to 5 Furthermore, in another embodiment, the sensing module 16 may include three optical sensors, which are respectively disposed relative to the drug infusion component 12, the injection component 14 and the safety detection component 22. Furthermore, Fig.13 The safety detection element 22 shown can be replaced by Figures 9 to 12 The safety detection element 22 is shown.

[0086] See also Fig.14 , Fig.14 FIG. 7 is a schematic diagram of a drug delivery device 7 according to an embodiment of the present invention.

[0087] like Fig.14As shown, the drug delivery device 7 includes a housing 70, a drug infusion piece 72, a motor 74, a sensing module 76 and a processing unit 78, wherein the drug infusion piece 72, the motor 74, the sensing module 76 and the processing unit 78 are all disposed in the housing 70. The motor 74 is configured to inject the drug solution 5 into the drug infusion piece 72. It should be noted that how the motor 74 injects the drug solution 5 into the drug infusion piece 72 is well known to the prior art and will not be described in detail herein. In the present embodiment, the drug infusion piece 72 may be a drug infusion tube or a similar component.

[0088] The sensing module 76 is configured to sense the state of the drug infusion part 72 and a current number of revolutions of the motor 74. In this embodiment, the sensing module 76 may include two optical sensors 760a, 760b, wherein the drug infusion part 72 is arranged along an optical axis A3 of one of the two optical sensors 760a, 760b, and a rotating portion 740 of the motor 74 is arranged along an optical axis A4 of the other of the two optical sensors 760a, 760b. Fig.14 As shown, the drug infusion part 72 can be arranged along the optical axis A3 of the optical sensor 760a, and the rotating part 740 of the motor 74 can be arranged along the optical axis A4 of the optical sensor 760b. The optical sensors 760a and 760b can be reflective photoelectric sensors, but are not limited to this. In practical applications, the reflective photoelectric sensor can be composed of a light emitting diode (LED) that emits light and a detector that receives reflected light from an object. It should be noted that the working principle of the reflective photoelectric sensor is well known to existing technicians and will not be repeated here.

[0089] When the drug infusion part 72 is not filled with the drug solution 5 or is filled with the drug solution 5, the optical sensor 760a can sense different amounts of reflected light relative to the drug infusion part 72 so that the processing unit 78 can distinguish different states of the drug infusion part 72. Therefore, the processing unit 78 can determine whether there is at least one bubble in the drug infusion part 72 based on the amount of reflected light relative to the drug infusion part 72. Similarly, when the rotating part 740 of the motor 74 passes through or does not pass through the optical axis A4 of the optical sensor 760b, the optical sensor 760b can sense different amounts of reflected light relative to the rotating part 740 to obtain the current number of revolutions of the motor 74. It should be noted that the amount of reflected light can be obtained by a variety of techniques, such as: (1) the selection of materials or elements (e.g., liquids), including material chemistry, color, opacity, surface texture and / or surface chemistry; (2) the stacking order of elements for reflection; (3) the distance between the element and the sensor; and (4) the presence or absence of all or part of the functional structure / element within the sensing area / range.

[0090] The processing unit 78 is coupled to the motor 74 and the sensing module 76. In this embodiment, the processing unit 78 can be coupled to the motor 74 and the sensing module 76 via a circuit layout (e.g., a circuit board, not shown in the figure). In practical applications, the processing unit 78 can be a processor or controller with data processing functions.

[0091] When the drug delivery device 7 is used to perform an injection procedure, the drug delivery device 7 may be in an injection-in-progress phase to inject a main injection amount (e.g., 95% of the target injection amount), and may be in a preparation-stop phase to inject a remaining injection amount (e.g., 5% of the target injection amount). In the injection-in-progress phase, the motor 74 may be programmed to rotate at a first predetermined number of revolutions, and in the preparation-stop phase, the motor 74 may be programmed to rotate at a second predetermined number of revolutions, wherein the second predetermined number of revolutions is greater than the first predetermined number of revolutions.

[0092] Therefore, when the current number of revolutions is greater than the first predetermined number of revolutions, it indicates that the main injection amount has been injected, so that the processing unit 18 will determine that the drug delivery device 7 is in the preparation to stop stage. When the drug delivery device 7 is in the preparation to stop stage, and the sensing module 76 senses that there is at least one bubble in the drug infusion part 72, the processing unit 78 determines whether the percentage of at least one bubble in the drug solution 5 in a time period is greater than a threshold. The threshold can be determined according to the actual application. Then, when the percentage of at least one bubble in the drug solution 5 in the time period is greater than the threshold, it indicates that the remaining injection amount has been almost or completely injected. At this time, even if the second predetermined number of revolutions has not been reached, the processing unit 18 will still determine that the injection procedure of the drug delivery device 7 has been completed and control the motor 74 to stop.

[0093] On the other hand, when the percentage of at least one bubble in the liquid medicine 5 during the time period is less than or equal to the threshold value, it indicates that the remaining injection volume has not been injected. At this time, the motor 74 will continue to operate until the current rotation speed reaches the second predetermined rotation speed. Generally speaking, when the current rotation speed reaches the second predetermined rotation speed, the remaining injection volume should have been almost or completely injected.

[0094] In addition, when the current number of revolutions is less than or equal to the first predetermined number of revolutions, the processing unit 78 determines that the drug delivery device 7 is in the injection-in-progress stage. When the drug delivery device 7 is in the injection-in-progress stage and the sensing module 76 senses that there is at least one bubble in the drug infusion part 72, the processing unit 78 determines that the drug infusion part 72 is leaking.

[0095] like Fig.14 As shown, the drug delivery device 7 may further include an alarm unit 80, which is disposed in the housing 70 and coupled to the processing unit 78. When the processing unit 78 determines that the drug infusion part 72 leaks, the processing unit 78 may control the alarm unit 80 to sound an alarm to warn the user to avoid danger during the injection procedure.

[0096] Fig.14 The embodiment shown can also be applied to Figures 1 to 13 The embodiment shown. According to the actual application, the sensing module may include at least one optical sensor, which is arranged relative to the drug infusion part, the injection part, the safety detection part and the motor, and the arrangement of the above components can also be determined according to the actual application. It should be noted that in addition to the number of revolutions of the motor, the present invention can also use the current injection time to determine whether the drug delivery device is in the injection in progress stage or the preparation stop stage, wherein the injection time can be timed by a timer. For example, when the current injection time is within a first injection time period, the processing unit can determine that the drug delivery device is in the injection in progress stage; when the current injection time exceeds the first injection time period and is within a second injection time period, the processing unit 18 can determine that the drug delivery device is in the preparation stop stage.

[0097] Therefore, in the preparation stop stage, when the remaining injection volume has been almost or completely injected, the processing unit will control the motor to stop even if the current injection time has not exceeded the second injection time period. On the other hand, when the remaining injection volume has not been completely injected, the motor will continue to operate until the second injection time period is reached. Generally speaking, when the second injection time period is reached, the remaining injection volume should have been almost or completely injected.

[0098] In summary, the drug delivery device of the present invention utilizes a sensing module to sense the status of a drug infusion part, an injection part, and / or a safety detection part, and then individually or in combination identifies corresponding operation actions (e.g., whether the drug infusion part is filled with liquid medicine, whether the drug delivery device is placed on the human body, whether the injection part is exposed from the drug delivery device or hidden in the drug delivery device, and / or whether there are bubbles in the drug infusion part), so that the processing unit of the drug delivery device can execute a corresponding safety mechanism to ensure the safety of injection of the human body. In addition, the sensing module can sense the current number of revolutions of a motor configured to inject liquid medicine into the drug infusion part, and then determine whether the drug delivery device is in the injection in progress stage or in the preparation to stop stage. Then, the processing unit of the drug delivery device can determine whether the drug infusion part is leaking during the injection in progress stage, or determine whether the injection procedure of the drug delivery device has been completed during the preparation to stop stage, and then execute a corresponding safety mechanism to ensure the safety of injection of the human body.

[0099] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.

Claims

1. A drug delivery device, characterized in that: include: a housing; a drug infusion component, disposed in the housing; an injection piece, disposed in the housing and connected to the drug infusion piece; a sensing module, disposed in the housing and configured to sense the states of the drug infusion component and the injection component; as well as a processing unit, disposed in the housing and coupled to the sensing module; When the processing unit determines that the drug infusion part is filled with a drug solution in response to the sensing module, the processing unit selectively controls the injection part to be exposed from the shell.

2. The drug delivery device according to claim 1, characterized in that When the processing unit determines that the drug liquid has been exhausted from the drug infusion part in response to the sensing module, the processing unit controls the injection part to be hidden in the housing.

3. The drug delivery device according to claim 2, characterized in that The injection piece is movably disposed in the shell, and the processing unit controls the injection piece to move relative to the shell so as to be exposed from the shell or hidden in the shell.

4. The drug delivery device according to claim 2, characterized in that: The shell includes a shielding member, which is movably arranged relative to the injection member. The processing unit controls the shielding member to move relative to the injection member so that the injection member is exposed from the shielding member or hidden in the shielding member.

5. The drug delivery device according to claim 1, wherein: It also includes a safety detection component that is movably disposed in the shell, and the sensing module is configured to sense the state of the safety detection component; when the processing unit responds to the sensing module and determines that the safety detection component is hidden in the shell, the processing unit first controls the drug to be injected into the drug infusion component, and then controls the injection component to be exposed from the shell.

6. The drug delivery device according to claim 5, characterized in that When the processing unit determines that the safety detection component is exposed from the housing in response to the sensing module, the processing unit controls the injection component to be hidden in the housing.

7. The drug delivery device according to claim 5, characterized in that When the housing is placed on an object and the safety detection component faces the object, the object forces the safety detection component to be hidden in the housing.

8. The drug delivery device according to claim 7, characterized in that When the shell is moved away from the object, the safety detection component is automatically exposed from the shell.

9. The drug delivery device according to claim 5, characterized in that The safety detection component surrounds the injection component.

10. The drug delivery device according to claim 9, characterized in that When the shell is moved away from the object, the safety detection component is automatically exposed from the shell and self-locked.

11. The drug delivery device according to claim 5, characterized in that The sensing module includes at least one optical sensor configured to sense light quantity related to at least one of the drug infusion component, the injection component and the safety detection component.

12. The drug delivery device according to claim 5, characterized in that The sensing module includes an optical sensor, and the drug infusion component, the safety detection component and the injection component are arranged along the optical axis of the optical sensor.

13. The drug delivery device according to claim 5, characterized in that The sensing module includes two optical sensors, and one of the drug infusion component, the safety detection component and the injection component is arranged along the optical axis of one of the two optical sensors, and the other two of the drug infusion component, the safety detection component and the injection component are arranged along the optical axis of the other of the two optical sensors.

14. The drug delivery device according to claim 1, wherein: Also included is a motor, disposed in the housing, coupled to the processing unit, and configured to inject the drug solution into the drug infusion part, and the sensing module is configured to sense a current number of revolutions of the motor; When the current number of revolutions is less than or equal to a first predetermined number of revolutions, the processing unit determines that the drug delivery device is in an injection-in-progress stage; when the current number of revolutions is greater than the first predetermined number of revolutions, the processing unit determines that the drug delivery device is in a preparation-to-stop stage.

15. The drug delivery device according to claim 14, characterized in that When the drug delivery device is in the injection-in-progress stage and the sensing module senses that there is at least one bubble in the drug infusion part, the processing unit determines that the drug infusion part is leaking.

16. The drug delivery device according to claim 15, characterized in that It also includes an alarm unit, which is disposed in the housing and coupled to the processing unit; when the processing unit determines that the drug infusion piece leaks, the processing unit controls the alarm unit to sound an alarm.

17. The drug delivery device of claim 14, wherein: When the drug delivery device is in the preparation stop stage and the sensing module senses the presence of at least one bubble in the drug infusion piece, the processing unit determines whether the percentage of the at least one bubble in the drug solution within a time period is greater than a threshold value; when the percentage of the at least one bubble in the drug solution within the time period is greater than the threshold value, the processing unit determines that the injection procedure of the drug delivery device has been completed and controls the motor to stop.

18. The drug delivery device according to claim 17, wherein: When the percentage of the at least one bubble in the liquid medicine during the time period is less than or equal to the threshold, the motor continues to operate until the current rotation speed reaches a second predetermined rotation speed; the second predetermined rotation speed is greater than the first predetermined rotation speed.

19. The drug delivery device of claim 14, wherein: The sensing module includes two optical sensors, the drug infusion piece is arranged along the optical axis of one of the two optical sensors, and a rotating part of the motor is arranged along the optical axis of the other of the two optical sensors.

20. A drug delivery device, characterized in that: include: a housing; a drug infusion component, disposed in the housing; a motor disposed in the housing and configured to inject a drug solution into the drug infusion part; a sensing module disposed in the housing and configured to sense a state of the drug infusion member and a current number of revolutions of the motor; as well as a processing unit, disposed in the housing and coupled to the motor and the sensing module; Wherein, when the current number of revolutions is greater than a first predetermined number of revolutions, the processing unit determines that the drug delivery device is in a ready-to-stop stage; Wherein, when the drug delivery device is in the preparation stop stage and the sensing module senses the presence of at least one bubble in the drug infusion part, the processing unit determines whether the percentage of the at least one bubble in the drug solution within a time period is greater than a threshold value; When the percentage of the at least one bubble in the drug solution during the time period is greater than the threshold, the processing unit determines that the injection procedure of the drug delivery device has been completed and controls the motor to stop.

21. The drug delivery device of claim 20, wherein: When the percentage of the at least one bubble in the liquid medicine during the time period is less than or equal to the threshold, the motor continues to operate until the current rotation speed reaches a second predetermined rotation speed; the second predetermined rotation speed is greater than the first predetermined rotation speed.

22. The drug delivery device of claim 20, wherein: When the current number of revolutions is less than or equal to the first predetermined number of revolutions, the processing unit determines that the drug delivery device is in an injection-in-progress stage; when the drug delivery device is in the injection-in-progress stage and the sensing module senses the presence of at least one bubble in the drug infusion piece, the processing unit determines that the drug infusion piece is leaking.

23. The drug delivery device of claim 22, wherein: It also includes an alarm unit, which is disposed in the housing and coupled to the processing unit; when the processing unit determines that the drug infusion piece leaks, the processing unit controls the alarm unit to sound an alarm.

24. The drug delivery device of claim 20, wherein: The sensing module includes two optical sensors, the drug infusion piece is arranged along the optical axis of one of the two optical sensors, and a rotating part of the motor is arranged along the optical axis of the other of the two optical sensors.

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