Medicinal liquid injection system and injection dose acquisition device thereof

Abstract

The present invention provides a medicinal liquid injection system and an injection dose acquisition device thereof. The injection dose acquisition device utilizes the characteristic of relative movement between a pen cap and a pen body of an injection pen itself to configure a signal generation assembly and a signal processing assembly, so that the signal generation assembly and the signal processing assembly are configured to move in synchronization while allowing relative movement therebetween, and the relative movement between the signal generation assembly and the signal processing assembly is adapted to relative axial movement and / or relative rotation between the pen body and the pen cap. Therefore, the signal processing assembly acquires signals from the signal generation assembly, and relative movement information between the signal generation assembly and the signal processing assembly is obtained on the basis of characteristic parameters of the signals, thereby obtaining the injection dose of a medicinal liquid on the basis of the relative movement information represented by electrical signals, facilitating subsequent data recording and analysis. The present invention can ensure an electronic and intelligent recording function for the injection dose of the medicinal liquid.

Description

Drug liquid injection system and injection dosage collection device thereof Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a liquid medicine injection system and an injection dosage collection device thereof. Background Art

[0002] For most diabetics, insulin injections are the standard and mainstream treatment. Currently, the most common approaches to achieve blood sugar control are automated insulin pump infusion or insulin pens. Compared to the more expensive insulin pumps, more diabetics choose to use inexpensive insulin pens, which offer simple operation, portability, precise dosing, virtually painless operation, and reliability.

[0003] The mainstream insulin pens currently on the market include brands like Lipont, Wanbang, Ganli, Xiulin, and Sanofi. A common design feature of these passive insulin pens is that the dose is set via a rotating cap, with each 360° rotation of the cap divided into a certain number of dosage units (for example, 24 units). During the injection process, the physician manually presses the cover on one end of the insulin pen, causing the cap to rotate and advance simultaneously.

[0004] Currently, mainstream insulin injection pens do not have some electronic and intelligent functions such as infusion volume recording and reminder functions, which makes it difficult to provide doctors with accurate infusion records and thus cannot obtain more accurate treatment plans. Summary of the Invention

[0005] The purpose of the present invention is to provide a drug solution injection system and an injection dosage collection device thereof to solve the problem that the current mainstream insulin injection pens do not have an electronic and intelligent drug solution injection dosage recording function, which makes it difficult to provide doctors with accurate drug injection records and thus cannot obtain more accurate treatment plans.

[0006] To solve the above technical problems, based on one aspect of the present invention, the present invention provides an injection dose collection device for being provided on an injection pen, wherein the injection pen comprises a pen body and a pen cap provided at one axial end of the pen body, the pen cap being rotatable about the axis of the pen body and synchronously moving along the axial direction of the pen body to inject the liquid medicine in the pen body outward, the injection dose collection device comprising a signal generating component and a signal processing component; the signal generating component and the signal processing component being configured to synchronously generate relative movement of the pen body in the axial direction and / or relative rotation about the axis of the pen body with the relative movement between the pen cap and the pen body; the signal processing component being configured to collect a signal generated by the signal generating component and, based on characteristic parameters of the signal, obtain a relative movement distance and / or relative rotation angle between the signal processing component and the signal generating component, thereby obtaining the injection dose of the medicine based on the relative movement distance and / or relative rotation angle.

[0007] Optionally, the relative movement between the signal generating component and the signal processing component includes relative rotation around the axis of the pen body; the signal generating component and the signal processing component are rotationally connected, one of the signal generating component and the signal processing component is used to connect to the pen cap and can drive the pen cap to rotate, and the other is used to transmit pressure to the button of the pen cap for liquid injection; the signal processing component is configured to obtain the relative rotation angle between the signal processing component and the signal generating component based on the number of signals received from the signal generating component or the change in the field distribution of the signal.

[0008] Optionally, the signal generating component includes a plurality of first detected elements, which are circumferentially and evenly arranged around the axis of the pen body; the signal processing component includes a first sensing unit and a first processing unit, the first sensing unit and the first detected element are each at an equal radial distance from the axis of the pen body; when the first sensing unit and the first detected element are relative to each other along the axial direction of the pen body, the first sensing unit outputs a first detection signal to the first processing unit, and the first processing unit is configured to obtain a relative rotation angle between the first sensing unit and the first detected element based on the number of times the first detection signal is received;

[0009] Optionally, the first detected element is a single magnet, and the first sensing unit is a magnetic sensor; or, the first detected element is a light reflecting element, and the first sensing unit is a photoelectric sensor; or, the first sensing unit is one or more of a Hall sensor and a mechanical sensor.

[0010] Optionally, the signal generating component includes a first detected element, which is a ring magnet and is used to be set coaxially with the axis of the pen body; the processing component includes a first sensing unit and a first processing unit that are communicatively connected to each other, the first sensing unit is used to be set on the axis of the pen body to detect the magnetic field distribution of the first detected element, and the first processing unit is used to obtain the relative rotation angle between the first sensing unit and the first detected element based on the change in the magnetic field distribution of the ring magnet.

[0011] Optionally, the signal generating component also includes a first mounting member, the first detected element is arranged on the first mounting member, and the signal processing component also includes a second mounting member, the first sensing unit and the first processing unit are both arranged on the second mounting member; the first mounting member and the second mounting member are rotatably connected, one of the first mounting member and the second mounting member is used to connect to the pen cap and can drive the pen cap to rotate, and the other is used to transmit pressure to the button of the pen cap when pressed to inject the drug solution.

[0012] Optionally, one of the first mounting member and the second mounting member used for connecting to the pen body is a rotating member, and the other is a fixed member; the rotating member includes a connecting seat and a shell connected to the connecting seat, the connecting seat is connected to the fixed member, and the shell is used to be mounted on the outer periphery of the pen cap, and the corresponding first detected element or the first sensing unit is arranged on the connecting seat.

[0013] Optionally, the first mounting member is the rotating member, and the connecting seat has a first through hole extending therethrough; the inner wall of the first through hole extends radially inwardly to form an extension portion, and the extension portion extends in a ring shape along the circumference of the first through hole, and the first detected element, which is a ring magnet, is arranged on the extension portion; and / or, the inner wall of the first through hole is recessed radially outwardly to form a receiving groove, and there are multiple receiving grooves, and the multiple receiving grooves are evenly arranged in sequence along the circumference of the first through hole, and the multiple first detected elements are arranged in each of the receiving grooves in sequence.

[0014] Optionally, one of the first mounting member and the second mounting member used for connecting to the pen body is a rotating member, and the other is a fixed member; the fixed member includes a pressing shell and a support seat, the pressing shell is sleeved on the support seat, the corresponding first detected element or the first sensing unit is arranged on the support seat, the support seat is rotatably connected to the rotating member, and the pressing shell is used to transmit pressure to the button of the pen cap when it is axially pressed.

[0015] Optionally, the second mounting member is the fixing member, the support seat has a second through hole extending therethrough, the inner wall of the second through hole forms a plurality of first limiting parts and a plurality of second limiting parts, the plurality of first limiting parts are arranged along the circumference of the second through hole, the plurality of second limiting parts are arranged along the circumference of the second through hole, the first limiting parts and the second limiting parts are spaced apart in the axial direction of the second through hole, and the first limiting part is closer to the first mounting member; the first processing unit includes a main board part and a switch part, the first sensor unit is integrated on the main board part, the main board part is arranged on the first limiting part, and the switch part is arranged on the second limiting part, and the pressing shell will trigger the switch part when it is pressed, so that the switch part starts the main board part to detect the signal of the first detected element through the first sensor unit.

[0016] Optionally, the relative movement between the signal generating component and the signal processing component includes relative movement in the axial direction of the pen body; one of the signal generating component and the signal processing component is used to be arranged on the pen cap, for transmitting pressure to the pen cap to drive the pen cap to rotate around the axis of the pen body and synchronously move along the axial direction of the pen body; the other of the signal generating component and the signal processing component is used to be arranged on the pen body; the signal processing component is configured to obtain the relative movement distance between the signal processing component and the signal generating component based on the strength or quantity of the signal received from the signal generating component, so as to determine the corresponding infusion dose of the injection pen.

[0017] Optionally, the signal generating component includes a second detected element, which generates a magnetic field signal; the signal processing component includes a second sensing unit and a second processing unit that are communicatively connected to each other, the second sensing unit is used to detect the magnetic field signal of the second detected element, and the second processing unit is used to obtain the relative movement distance between the second sensing unit and the second detected element based on the intensity of the magnetic field signal.

[0018] Optionally, the second detected element and the second sensing unit are both located on the axis of the pen body; or, there are multiple second detected elements, and the multiple second detected elements are arranged around the axis of the pen body, and the radial distances of the second sensing unit and the second detected element to the axis of the pen body are equal.

[0019] Optionally, the signal generating component includes a plurality of second detected elements, which are circumferentially and evenly arranged around the axis of the pen body; the signal processing component includes a second sensing unit and a second processing unit, and the radial distances between the second sensing unit and the second detected element and the axis of the pen body are equal; when the second sensing unit and the second detected element are relative to each other along the axial direction of the pen body, the second sensing unit outputs a second detection signal to the second processing unit, and the second processing unit is used to obtain the relative movement distance between the second sensing unit and the second detected element based on the number of times the second detection signal is received.

[0020] Optionally, the second detected element is a light reflecting element, and the second sensing unit is a photoelectric sensor.

[0021] Optionally, the signal generating assembly further includes a shell-shaped third mounting member, in which the second detected element is disposed, and the signal processing assembly further includes a shell-shaped fourth mounting member, in which the second sensing unit and the second processing unit are both disposed. One of the third and fourth mounting members is configured to be mounted on the pen cap and, when pressed, to transmit pressure to the pen cap; the other of the third and fourth mounting members is configured to be mounted on the pen body; one of the third and fourth mounting members is configured to be sleeved onto the outer circumference of the pen cap, and the other of the third and fourth mounting members is configured to be clipped onto the pen body.

[0022] Optionally, the injection dose collection device further includes a touch element, which controls the circuit connectivity of the signal processing component when touched, that is, the touch element is configured to control the circuit connectivity of the signal processing component by detecting the touching action before the pen cap and the pen body generate relative movement, so as to power on the signal processing component.

[0023] Optionally, the signal generating component and the signal processing component are rotatably connected, and one of the signal generating component and the signal processing component is connected to the pen cap and can drive the pen cap to rotate; the other of the signal generating component and the signal processing component has a pressing shell, and the touch element is arranged in the pressing shell and is located at one end of the pressing shell away from the pen body along the axial direction of the pen body; or, one of the signal generating component and the signal processing component is arranged on the pen body, and the other is arranged on the pen cap and can drive the pen cap to rotate, and the touch element is arranged inside the one of the signal generating component and the signal processing component arranged on the pen cap and is located at one end of the signal generating component and the signal processing component arranged on the pen cap along the axial direction of the pen body away from the pen body; or, the touch element is arranged inside the one of the signal generating component and the signal processing component arranged on the pen body and is located at one end of the signal generating component and the signal processing component arranged on the pen body along the radial direction of the pen body away from the pen body.

[0024] Optionally, the touch element is a capacitive touch element, a resistive touch element, an infrared sensing touch element or an optical touch element.

[0025] Optionally, the position in the injection dose collection device for triggering the signal processing component to power on is the same as or different from the position for triggering the start of injection of the medicinal liquid.

[0026] Optionally, the action for triggering the signal processing component to be powered on in the injection dose collection device is the same as or different from the action for triggering the start of injection of the medicine, and when the action for triggering the signal processing component to be powered on is different from the action for triggering the start of injection of the medicine, the action for triggering the signal processing component to be powered on is tissue touching, and the action for triggering the start of injection of the medicine is applying force and pressing.

[0027] To solve the above technical problems, based on another aspect of the present invention, the present invention further provides a liquid medicine injection system, comprising: an injection pen, the injection pen comprising a pen body and a pen cap provided at one axial end of the pen body, the pen cap being rotatable around the axis of the pen body and synchronously moving along the axial direction of the pen body to inject the liquid medicine in the pen body outward; and the injection dose collection device as described above, wherein at least one of the signal generating component and the signal processing component is located on the pen cap.

[0028] Optionally, one of the signal generating component and the signal processing component connected to the pen cap is detachably connected to the pen cap.

[0029] The injection dose collection device as described above utilizes the relative movement characteristics between the pen cap and the pen body of the injection pen to configure the signal generating component and the signal processing component, so that the signal generating component and the signal processing component can also generate relative movement synchronously, and the relative movement between the signal generating component and the signal processing component is adapted to the relative axial movement and / or relative rotation between the pen body and the pen cap, so that the signal of the signal generating component is collected by the signal processing component, and the relative movement information between the signal generating component and the signal processing component is obtained based on the characteristic parameters of the signal. The characteristic parameters of the signal here include the intensity of the signal, the number of signals (number) and the field distribution change of the signal. The relative movement information includes the relative movement distance and / or relative rotation angle between the signal generating component and the signal processing component, and then the injection dose of the drug solution is obtained based on the relative movement information of the electrical signal, which facilitates the subsequent data recording and analysis. Moreover, compared with the prior art method of recording the injection dose through the sound signal configured when the pen cap is rotated, the present invention records the injection dose in the form of electrical signals throughout the process, ensuring more accurate data recording, ensuring that there is no other noise in the environment during the injection process, improving the patient experience, and the present invention ensures the electronic and intelligent recording function of the drug injection dose.

[0030] It should be noted that the liquid medicine injection system includes the injection dosage collection device and also has the technical effects brought by the injection dosage collection device, which will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Those skilled in the art will appreciate that the accompanying drawings are provided for a better understanding of the present invention and do not constitute any limitation on the scope of the present invention.

[0032] FIG1 is a schematic diagram of an injection pen in the prior art;

[0033] FIG2 is an exploded view of the injection dose collection device according to the first embodiment of the present invention;

[0034] FIG3 is an assembly diagram of the injection dose collection device according to the first embodiment of the present invention;

[0035] FIG4 is a schematic diagram of a connecting socket according to a first embodiment of the present invention;

[0036] FIG5 is another schematic diagram of the connecting socket according to the first embodiment of the present invention;

[0037] FIG6 is a schematic diagram of a first detected element according to the first embodiment of the present invention;

[0038] FIG7 is a schematic diagram of a support base according to a first embodiment of the present invention;

[0039] FIG8 is a schematic diagram of an injection dose collection device according to a second embodiment of the present invention assembled on an injection pen;

[0040] FIG9 is another schematic diagram of the injection dose collection device of the second embodiment of the present invention assembled on the injection pen;

[0041] FIG10 is a schematic diagram of a second detected element according to the second embodiment of the present invention;

[0042] 11 is a schematic diagram of a fourth mounting member according to the second embodiment of the present invention;

[0043] FIG. 12 is a flowchart of a drug injection system according to an embodiment of the present invention.

[0044] In the accompanying drawings: 100 - injection pen; 110 - pen body; 111 - visual window; 120 - pen cap; 121 - button; 122 - rotating body; 200 - signal generating assembly; 210 - first detected element; 220 - first mounting member; 221 - connecting seat; 2211 - first through hole; 2212 - extension portion; 2213 - receiving groove; 222 - housing; 223 - abutment portion; 230 - second detected element; 240 - third mounting member; 300-signal processing component; 310-first sensor unit; 320-first processing unit; 321-mainboard; 3211-first circuit board; 3212-battery; 322-switch part; 330-second mounting member; 331-pressing shell; 332-support seat; 3321-second through hole; 3322-first limiting part; 3323-second limiting part; 3324-guide part; 340-fourth mounting member; 341-clamping part; 342-positioning part; 350-indicator light; 360-touch element. DETAILED DESCRIPTION

[0045] To make the objects, advantages, and features of the present invention more clearly apparent, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale. They are only used to conveniently and clearly assist in illustrating the purposes of the embodiments of the present invention. In addition, the structures shown in the drawings are often part of the actual structure. In particular, different drawings may need to illustrate different aspects and may sometimes use different scales.

[0046] As used in the present invention, the singular forms "a", "an", and "the" include plural referents, the term "or" is generally used to include "and / or", the term "several" is generally used to include "at least one", and the term "at least two" is generally used to include "two or more". In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features specified as "first", "second", and "third" may explicitly or implicitly include one or at least two of the features, "one end" and "the other end" and "proximal end" and "distal end" generally refer to two corresponding parts, which not only include endpoints, and the terms "mounted", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be a communication between two elements or an interaction relationship between two elements. In addition, as used in the present invention, "one element is disposed on another element" generally only indicates that there is a connection, coupling, cooperation, or transmission relationship between the two elements, and the connection, coupling, cooperation, or transmission between the two elements may be direct or indirect through an intermediate element. It should not be understood as indicating or implying a spatial positional relationship between the two elements. That is, one element can be in any orientation, such as inside, outside, above, below, or to one side of another element, unless the content clearly indicates otherwise. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] FIG1 is a schematic diagram of an injection pen in the prior art. Referring to FIG1 , the injection pen 100 includes a pen body 110 and a pen cap 120 disposed at one axial end of the pen body 110. The pen body 110 can store liquid medicine (such as insulin). The pen cap 120 includes a rotator 122 and a button 121. The rotator 122 can rotate around the axis of the pen body 110 (clockwise and counterclockwise). The rotator 122 is used to adjust the injection dose of the medication in the injection pen 100 by rotating it at different angles. After adjusting the injection dose, the liquid medicine can be ejected from the pen body 110 by pressing the button 121, completing the injection operation. The injection pen 100 can adjust the desired amount of liquid medicine by configuring the rotator 122. The provision of the button 121 ensures that the liquid medicine can be continuously injected according to the patient's needs, thereby facilitating user operation.

[0048] Preferably, the pen body 110 is provided with a viewing window 111, through which a scale indicating the injection dose can be observed. Specifically, when the rotating body 122 rotates relative to the pen body 110 to adjust the injection dose of the liquid medicine, the scale changes can be observed through the viewing window 111 to determine whether the injection amount is appropriate, thereby facilitating user operation. As shown in Figure 1, after adjusting the injection dose, the position of the scale on the rotating body 122 can be observed through the viewing window 111 to determine the injection dose. By pressing the button 121, the corresponding injection dose of liquid medicine (insulin) can be ejected from the pen body 110. Specifically, when the button 121 is pressed, the rotating body 122 rotates back relative to the pen body 110, and the reading observed in the viewing window 111 returns to zero, indicating that the injection is complete. Resetting rotation refers to the rotation of the rotating body 122 when adjusting the injection dose. During the process of ejecting insulin from the pen body 110, the rotating body 122 returns to its initial position, facilitating multiple injections.

[0049] It should be further explained that when the pen cap 120 rotates about the axis of the pen body 110, it simultaneously moves along the axial direction of the pen body 110. In other words, the movement of the pen cap 120 relative to the pen body 110 is a spiral upward or downward motion in the axial direction of the pen body 110. Specifically, the rotating body 122 rotates in a spiral upward or downward motion relative to the pen body 110. This means that the upper end of the rotating body 122 can move away from the pen body 110 when adjusting the injection dose. As can be understood, after completing an injection, the next injection dose can be adjusted by rotating the rotating body 122. Similarly, after adjusting the injection dose, the injection operation can be performed by pressing the button 121. This makes the injection pen 100 suitable for multiple injections.

[0050] Typically, one rotation of the rotator 122 (i.e., 360° rotation of the rotator 122) is divided into multiple dosage units. The injection dose of the liquid medicine can be determined by detecting the number of dosage units the rotator 122 has rotated. For example, if one rotation of the rotator 122 is divided into 24 dosage units, then one dosage unit is incremented for every 15° rotation of the rotator 122. For example, if the rotator 122 rotates 60°, the injection pen 100 injects four dosage units of liquid medicine. It is understood that after rotating the rotator 122 to adjust the injection dose of the liquid medicine, the injection is initiated by pressing the button 121, which reverses the rotation of the rotator 122 to the same angle as the adjustment angle, thereby injecting the corresponding dose of liquid medicine into the body. Furthermore, the volume of liquid medicine represented by each pre-set dosage unit can be used to determine the actual injection dose of the liquid medicine.

[0051] Based on the aforementioned injection pen 100, the present invention provides a liquid drug injection system, comprising the aforementioned injection pen 100 and an injection dose collection device. The injection dose collection device is disposed on the injection pen 100 and is used to collect the injection dose of the liquid drug injected into the injection pen 100. As shown in FIG2 , the injection dose collection device specifically comprises a signal generating component 200 and a signal processing component 300. At least one of the signal generating component 200 and the signal processing component 300 is located on the pen cap 120. This includes the following scenarios: both the signal generating component 200 and the signal processing component 300 are located on the pen cap 120; or one of the signal generating component 200 and the signal processing component 300 is disposed on the pen cap 120, while the other of the signal generating component 200 and the signal processing component 300 is disposed on the pen body 110. In the case where the signal generating component 200 and the signal processing component 300 are both arranged at the pen cap 120, the signal generating component 200 and the signal processing component 300 are connected and arranged on the pen cap 120 along the axial direction of the pen body 110. One of them is connected to the rotating body 122. Applying pressure to the other can transfer the pressure to the button 121 of the pen cap 120, thereby injecting the drug solution, and the one connected to the rotating body 122 will drive the rotating body 122 to rotate, and the size of the current injection dose can be observed in the visual window 111.

[0052] Furthermore, the signal generating assembly 200 and the signal processing assembly 300 can synchronously generate relative movement of the pen body 110 in the axial direction and / or relative rotation about the axis of the pen body 110 along with the relative movement between the pen cap 120 and the pen body 110. It is understood that the movement between the pen cap 120 and the pen body 110 includes the pen cap 120 spirally ascending and descending along the axial direction of the pen body 110. Therefore, the relative movement between the pen cap 120 and the pen body 110 includes relative movement in the axial direction of the pen body 110 and relative rotation about the axis of the pen body 110. Due to the different arrangements of the signal generating assembly 200 and the signal processing assembly 300 on the injection pen 100, the relative movement between the signal generating assembly 200 and the signal processing assembly 300 includes relative movement in the axial direction of the pen body 110 and / or relative rotation about the axis of the pen body 110. Therefore, the relative movement information between the two includes the relative distance in the axial direction of the pen body 110 and the relative rotation angle about the axis of the pen body 110. Specifically, one of the signal generating component 200 and the signal processing component 300 is located at the pen cap 120, and the other is located at the pen body 110, then the relative movement between the signal generating component 200 and the signal processing component 300 includes relative movement in the axial direction of the pen body 110 and relative rotation around the axis of the pen body 110; if both the signal generating component 200 and the signal processing component 300 are located at the pen cap 120, then the relative movement between the signal generating component 200 and the signal processing component 300 includes relative rotation around the axis of the pen body 110.

[0053] Furthermore, the signal generating component 200 can generate a signal, the signal processing component 300 can receive the signal generated by the signal generating component 200, and the signal processing component 300 can obtain the relative motion information between the signal processing component 300 and the signal generating component 200 based on the characteristic parameters of the signal of the signal generating component 200, specifically obtain the relative movement distance and / or relative rotation angle between the two, so that the injection dose of the medicine can be obtained based on the relative motion information, thereby realizing the automatic collection of the injection dose of the medicine in the form of an electrical signal.

[0054] Here, the number of dosage units of the aforementioned liquid medicine is typically obtained based on the relative motion information, thereby determining the injection dose of the liquid medicine. Of course, the corresponding number of dosage units obtained can also be used as the injection dose of the liquid medicine. It should be noted that the characteristic parameters of the signal here include signal intensity (amplitude), signal quantity (number, frequency), and changes in the signal field distribution. In this way, the injection dose collection device of the present invention utilizes the relative movement characteristics between the pen cap 120 and the pen body 110 of the injection pen 100 itself to configure the signal generating component 200 and the signal processing component 300, so that the signal generating component 200 and the signal processing component 300 can also generate relative movement synchronously, and the relative movement between the signal generating component 200 and the signal processing component 300 is adapted to the relative axial movement and / or relative rotation between the pen body 110 and the pen cap 120, so that the signal of the signal generating component 200 is collected by the signal processing component 300, and the relative movement information between the signal generating component 200 and the signal processing component 300 is obtained based on the characteristic parameters of the signal, and then the injection dose of the liquid medicine is obtained based on the relative movement information of the electrical signal, which facilitates the subsequent data recording and analysis. Moreover, compared with the prior art method of recording the injection dose by means of a sound signal configured when the pen cap 120 is rotated, the present invention records the injection dose in the form of an electrical signal throughout the entire process, thereby ensuring more accurate data recording. In addition, the present invention ensures the electronic and intelligent recording function of the drug injection dose. For example, the recorded information can be remotely sent to the doctor, who can then learn about the patient's condition through the recorded information and provide timely treatment plans.

[0055] Preferably, one of the signal generating assembly 200 and the signal processing assembly 300 connected to the pen cap 120 is detachably connected to the pen cap 120, that is, detachably connected to the rotating body 122. This facilitates separation of the injection dose collection device from the injection pen 100 after the injection is completed. Furthermore, this detachable connection allows the injection dose collection device to be connected to the rotating body 122 of injection pens 100 of different sizes with minimal or no adjustment to the signal generating assembly 200, thereby expanding the applicability of the injection dose collection device at minimal cost.

[0056] The manner of obtaining the relative motion information between the signal generating component 200 and the signal processing component 300 based on different characteristic parameters of the signal is described in detail below in conjunction with the first and second embodiments of the present invention.

[0057] [Example 1]

[0058] For this embodiment, please refer to Figures 2 to 7, wherein Figure 2 is an exploded view of the injection dose collection device of the first embodiment of the present invention, Figure 3 is an assembly view of the injection dose collection device of the first embodiment of the present invention, Figure 4 is a schematic diagram of the connecting seat of the first embodiment of the present invention, Figure 5 is another schematic diagram of the connecting seat of the first embodiment of the present invention, Figure 6 is a schematic diagram of the first detected element of the first embodiment of the present invention, and Figure 7 is a schematic diagram of the support seat of the first embodiment of the present invention.

[0059] 2 and 3 , the core concept of this embodiment is that the signal processing component 300 obtains the relative rotation angle between the signal generating component 200 and the signal processing component 300 around the axis of the pen body 110 based on the signal of the signal generating component 200, such as the number of signals (the number of receptions, i.e., counting of the signals) or the change in the field distribution of the signals, and then obtains the corresponding number of dosage units of the liquid medicine based on the relative rotation angle. Specifically, the relative movement between the signal generating assembly 200 and the signal processing assembly 300 includes relative rotation about the axis of the pen body 110. The signal generating assembly 200 and the signal processing assembly 300 are both located on the pen cap 120 and are rotationally connected to each other. One of the signal generating assembly 200 and the signal processing assembly 300 is used to connect to the rotating body 122 of the pen cap 120 and can drive the rotating body 122 of the pen cap 120 to rotate, thereby adjusting the injection dose size and rotating when injecting the liquid medicine. The other is used to transmit pressure to the button 121 of the pen cap 120 to inject the liquid medicine. The signal processing assembly 300 is configured to obtain the relative rotation angle between the signal processing assembly 300 and the signal generating assembly 200 based on the amount or field distribution change of the signal received from the signal generating assembly 200. For example, the signal generating component 200 is connected to the rotating body 122. When the doctor holds the injection pen 100 and presses the signal processing component 300 to transmit pressure to the button 121 to inject the drug solution, the signal generating component 200 will rotate synchronously with the rotating body 122. The signal processing component 300 does not rotate relative to the pen body 110, but moves in the axial direction of the pen body 110. There is relative rotation between the signal generating component 200 and the signal processing component 300.

[0060] Regarding the specific manner in which the signal processing component 300 obtains the relative rotation angle between the signal processing component 300 and the signal generating component 200 based on the number of signals, the signal generating component 200 includes a plurality of first detected elements 210, and the plurality of first detected elements 210 are uniformly arranged circumferentially around the axis of the pen body 110; the signal processing component 300 includes a first sensing unit 310 and a first processing unit 320, and the radial distances between the first sensing unit 310 and the first detected element 210 and the axis of the pen body 110 are equal, so that when the signal processing component 300 and the signal generating component 200 generate relative rotation, the first sensing unit 310 can be opposite to the first detected element 210 along the axial direction of the pen body 110. Furthermore, when the first sensing unit 310 and the first detected element 210 are opposed to each other along the axial direction of the pen body 110, the first sensing unit 310 can output a first detection signal to the first processing unit 320. The first processing unit 320 is configured to determine the relative rotation angle between the first sensing unit 310 and the first detected element 210 based on the number of first detection signals received. Furthermore, the number of first detected elements 210 is preferably configured to be equal to the number of dosage units set above. In this manner, when the signal generating assembly 200 and the signal processing assembly 300 generate synchronous relative motion with the pen cap 120 and the pen body 110, the first sensing unit 310 sequentially faces the plurality of first detected elements 210 in the axial direction of the pen body 110. Each time the first sensing unit 310 faces each other, it outputs a first detection signal. Each time the first processing unit 320 receives a first detection signal, it indicates the relative rotation angle generated between the signal generating assembly 200 and the signal processing assembly 300. Based on the number of consecutive first detection signals received, the total relative rotation angle between the signal generating assembly 200 and the signal processing assembly 300 is determined, which is in turn the number of dosage units rotated by the rotating body 122, thereby determining the injected dosage of the medicinal solution. For example, a 15° rotation can be set to correspond to one dosage unit of the medicinal solution being injected.

[0061] In one embodiment, the first detected element 210 is a single magnet (as shown in FIG6 ), and the first sensing unit 310 is a magnetic sensor. Thus, when the magnetic sensor and the single magnet are axially opposed to each other in the pen body 110, the magnetic sensor detects the magnetic signal of the single magnet once and outputs a first detection signal to the first processing unit 320. It should be noted that, in practice, magnetic signals from other single magnets will also be received by the magnetic sensor. Considering that the distance between the single magnet and the magnetic sensor is shortest when they are axially opposed, the strength of the signal received by the magnetic sensor is also maximum. Therefore, during each rotation, when the strength of the signal received by the magnetic sensor reaches its maximum, it is considered that the magnetic sensor has received the signal from the axially opposed single magnet and outputs a first detection signal.

[0062] In another embodiment, the first detected element 210 is a light reflector, and the first sensing unit 310 is a photosensor. Thus, when the first detected element 210 and the first sensing unit 310 are axially opposed to each other with respect to the pen body 110, the light beam from the photosensor is reflected back, causing the internal circuit of the photosensor to form a closed loop, thereby outputting a first detection signal to the first processing unit 320. When the first detected element 210 and the first sensing unit 310 are not axially opposed to each other with respect to the pen body 110, the internal circuit of the photosensor is disconnected, and the first detection signal cannot be output to the first processing unit 320.

[0063] In some other embodiments, the first sensing unit 310 is one or more of a Hall sensor and a mechanical sensor.

[0064] It should be noted that the design of the mechanical structure of the signal generating component 200 and the signal processing component 300 needs to ensure that there is no structure that blocks light or magnetic signals between the first detected element 210 and the first sensing unit 310 when they are opposite to each other in the axial direction of the pen body 110.

[0065] Regarding the specific manner in which the signal processing component 300 obtains the relative rotation angle between the signal processing component 300 and the signal generating component 200 based on the change in the field distribution of the signal, the signal generating component 200 includes a first detected element 210, which is a ring magnet (shown in Figure 2) and is used to be arranged coaxially with the axis of the pen body 110; the processing component includes a first sensing unit 310 and a first processing unit 320 that are communicatively connected to each other, the first sensing unit 310 (a magnetic sensor) is used to be arranged on the axis of the pen body 110 to detect the magnetic field distribution of the first detected element 210, that is, the magnetic sensor detects the magnetic field distribution of the ring magnet, and the first processing unit 320 is used to obtain the relative rotation angle between the first sensing unit 310 and the first detected element 210 based on the magnetic field distribution of the ring magnet, thereby obtaining a corresponding number of dosage units of the medicinal solution. Those skilled in the art will appreciate that the annular magnet herein has a single north pole and a south pole arranged in opposite directions along its diameter, with half of the annular magnet being a north pole and the other half being a south pole. During relative rotation between the annular magnet and the magnetic sensor, the magnetic field distribution of the annular magnet relative to the magnetic sensor will change accordingly, thereby enabling the magnetic sensor to detect the change in magnetic field distribution and determine the relative rotation angle between the magnetic sensor and the annular magnet. It should be noted that the magnetic sensor herein may be a giant magnetoresistance (GMR) sensor or a tunnel magnetoresistance (TMR) sensor, capable of sensing the angle of rotation of the annular magnet.

[0066] Regarding the installation method of the first detected element 210, the first sensor unit 310 and the first processing unit 320, referring to Figures 2 and 3, the signal generating component 200 also includes a first mounting component 220, and the first detected element 210 is fixedly set on the first mounting component 220. The signal processing component 300 also includes a second mounting component 330, and the first sensor unit 310 and the first processing unit 320 are both fixedly set in the second mounting component 330, specifically on the support base 332 of the second mounting component 330. The first mounting member 220 and the second mounting member 330 are arranged in the axial direction of the pen body 110. The first mounting member 220 and the second mounting member 330 are rotationally connected to each other to realize the rotational connection between the signal generating component 200 and the signal processing component 300. One of the first mounting member 220 and the second mounting member 330 is used to connect with the rotating body 122 of the pen cap 120 and can drive the pen cap 120 to rotate, and the other is used to transmit pressure to the button 121 of the pen cap 120 when pressed to inject the liquid medicine.

[0067] In this embodiment, one of the first mounting member 220 and the second mounting member 330 connected to the rotating body 122 of the pen cap 120 is a rotating member, and the other is a fixed member. When the physician presses the fixed member, pressure is transmitted to the button 121, thereby performing the injection operation. The method of pushing the corresponding injection dose of liquid medicine from the pen body 110 by pressing the button 121 can be to transmit pressure by having the fixed member always abut against the button 121, or by having the fixed member, after being pressed, move a certain distance along the axial direction of the pen body 110 before abutting against the button 121. The former method has a higher degree of response to pressure transmission, while the latter method can better prevent accidental touches that initiate injections. Both methods can be selected and configured by those skilled in the art.

[0068] Furthermore, the rotating member includes a connecting base 221 and a housing 222 connected to the connecting base 221. The connecting base 221 is rotatably connected to the fixed member. The housing 222 is configured to be mounted on the outer circumference of the pen cap 120. The corresponding first detected element 210 or first sensor unit 310 is disposed on the connecting base 221. The connecting base 221 can be removably mounted with housings 222 of different sizes and models. Each injection pen 100 corresponds to a specific size and model of housing 222. By providing the housing 222, this embodiment allows the injection dose collection device to be applied to injection pens 100 of different models and brands with a simple mechanical structure.

[0069] In an exemplary embodiment, referring to Figures 2, 4, and 5, the first mounting member 220 is a rotating member, and the second mounting member 330 is a fixed member. The first mounting member 220 includes the aforementioned connecting base 221 and a housing 222 connected to the connecting base 221. For the installation method in which the first detected element 210 is a ring magnet, the connecting base 221 has a first through-hole 2211 extending therethrough. The first through-hole 2211 is coaxial with the pen body 110. The inner wall of the first through-hole 2211 extends radially inward to form an extension portion 2212 (shown in Figure 4). The extension portion 2212 extends in an annular shape along the circumference of the first through-hole 2211. The first detected element 210, which is a ring magnet, is mounted on the extension portion 2212. An extension portion 2212 is provided at each axial end of the first through-hole 2211, thereby mounting a ring magnet. For the installation method in which the first detected element 210 is a single magnet or a light reflector, the inner wall of the first through hole 2211 is recessed radially outward to form a receiving groove 2213 (as shown in FIG5 ), and there are multiple receiving grooves 2213 , which are evenly spaced in sequence along the circumference of the first through hole 2211 , and multiple first detected elements 210 are arranged in each receiving groove 2213 in sequence.

[0070] Further, referring to FIG. 2 , the fixing member includes a pressing shell 331 and a support base 332. The pressing shell 331 is sleeved onto the support base 332. The corresponding first detected element 210 or first sensor unit 310 is disposed on the support base 332. The support base 332 is rotatably connected to the rotating member. The pressing shell 331 is an elastic shell (such as a silicone shell). When axially pressed, it elastically deforms, thereby transmitting pressure to the button 121 of the pen cap 120 to perform the injection operation. Preferably, the gap between the support base 332 and the pressing shell 331 is sealed by adhesive bonding, so that the fixing member has a well-sealed environment, thereby extending the service life of the internal structure.

[0071] In an exemplary embodiment, referring to FIG7 , the first mounting member 220 is a rotating member and the second mounting member 330 is a fixed member. The second mounting member 330 then includes the aforementioned support base 332 and a pressing shell 331. Regarding the mounting method of the first sensing unit 310, the support base 332 has a second through hole 3321 extending therethrough. The second through hole 3321 is coaxial with the pen body 110. The inner wall of the second through hole 3321 is formed with a plurality of first limiting portions 3322 and a plurality of second limiting portions 3323. The plurality of first limiting portions 3322 are arranged along the circumference of the second through hole 3321, and the plurality of second limiting portions 3323 are arranged along the circumference of the second through hole 3321. The first limiting portions 3322 and the second limiting portions 3323 are spaced apart in the axial direction of the second through hole, with the first limiting portion 3322 being closer to the first mounting member 220. The first processing unit 320 includes a mainboard portion 321 and a switch portion 322 (shown in FIG. 1 ). The first sensor unit 310 is integrated into the mainboard portion 321. The mainboard portion 321 is positioned within a first stopper 3322, thereby axially supporting the mainboard portion 321. The switch portion 322 is positioned within a second stopper 3323, thereby axially supporting the switch portion 322. When the pressing shell 331 is pressed, the switch portion 322 is triggered, activating the mainboard portion 321, thereby enabling the first sensor unit 310 to detect the signal of the first detected element 210. A gap is provided axially between the first stopper 3322 and the second stopper 3323 in the second through-hole 3321. This prevents the switch portion 322 from contacting the mainboard portion 321 when activated by the pressing shell 331, thereby preventing pressure from being transmitted to the mainboard portion 321 and affecting the performance and lifespan of components on the mainboard portion 321.

[0072] Specifically, referring to FIG7 , the inner wall of the second through hole 3321 of the support seat 332 has a radially inwardly protruding and axially extending guide portion 3324. The guide portions 3324 are multiple and arranged circumferentially around the second through hole 3321. A first stopper 3322 and a second stopper 3323 are located at either end of the guide portion 3324. The second stopper 3323 positions the switch portion 322 by forming a groove between the end of the guide portion 3324 and the inner wall of the through hole. During installation, the main plate 321 is first assembled into the second through hole 3321 along the guide portion 3324. The main plate 321 is positioned by the first stopper 3322, which may be a fixing buckle for securing the main plate 321. The switch portion 322 is then assembled onto the top of the guide portion 3324. The switch portion 322 is then positioned by the second stopper 3323.

[0073] Further, referring to FIG. 2 , the main board portion 321 includes a first circuit board 3211 and a battery 3212 disposed on the first circuit board 3211. The first sensor unit 310 is integrated on the first circuit board 3211. When the pressing shell 331 is pressed, the switch portion 322 is triggered, causing the switch portion 322 to connect the circuit between the battery 3212 and the first circuit board 3211, ensuring that the battery 3212 can supply power to the first sensor unit 310, enabling the first sensor unit 310 to start operating and detect the signal of the first detected element 210. In one embodiment, the switch portion 322 includes a second circuit board and a pot piece disposed on the second circuit board. When the pressing shell 331 is pressed, pressure is transmitted to the pot piece, causing the pot piece to be pressed and connect the corresponding circuit to form a loop, thereby connecting the circuit between the battery 3212 and the first circuit board 3211 and ensuring that the battery 3212 can supply power to the first sensor unit 310.

[0074] Regarding the above-mentioned connecting seat 221 and supporting seat 332, the injection dose collection device of this embodiment further includes an abutment portion 223, which connects the connecting seat 221 and the supporting seat 332 together through a mechanical connection (such as a threaded connection), thereby realizing the connection between the first mounting member 220 and the second mounting member 330.

[0075] [Example 2]

[0076] For this embodiment, please refer to Figures 8 to 10, wherein Figure 8 is a schematic diagram of the injection dose collection device of the second embodiment of the present invention assembled on the injection pen, Figure 9 is another schematic diagram of the injection dose collection device of the second embodiment of the present invention assembled on the injection pen, Figure 10 is a schematic diagram of the second detected element of the second embodiment of the present invention, and Figure 11 is a schematic diagram of the fourth mounting member of the second embodiment of the present invention.

[0077] The core concept of this embodiment is that the signal processing component 300 determines the relative movement distance between the signal generating component 200 and the signal processing component 300 along the pen body 110 based on the signal strength or number (number of times) of the signal generating component 200, and further determines the injection dose of the liquid medicine based on this relative movement distance. Specifically, referring to Figure 8, the relative movement between the signal generating component 200 and the signal processing component 300 includes relative movement in the axial direction of the pen body 110. One of the signal generating component 200 and the signal processing component 300 is mounted on the pen cap 120 and is configured to transmit pressure to the button 121 of the pen cap 120 and drive the rotating body 122 of the pen cap 120 to rotate, driving the pen cap 120 to rotate about the axis of the pen body 110 and simultaneously move along the axial direction of the pen body 110, thereby injecting the liquid medicine. The other of the signal generating component 200 and the signal processing component 300 is mounted on the pen body 110 and is fixed relative to the pen body 110. The signal processing component 300 is configured to determine the relative movement distance between the signal processing component 300 and the signal generating component 200 based on the strength or quantity of the signal received from the signal generating component 200. For example, the signal generating component 200 is mounted on the pen cap 120 and is configured to transmit pressure to the button 121 of the pen cap 120, thereby generating axial and rotational movement of the pen cap 120 and the pen body 110. The signal processing component 300 is mounted on the pen body 110 and generates relative movement with the pen body 110 and the signal generating component 200 mounted on the pen cap 120. After determining the relative movement distance between the signal generating component 200 and the signal processing component 300, this relative movement distance can be equated to a corresponding number of unit distances. Each unit distance can be equated to a dosage unit of the liquid medicine, thereby determining the corresponding number of dosage units of the liquid medicine and, therefore, the actual injected dosage of the liquid medicine.

[0078] Regarding the specific manner in which the signal processing component 300 obtains the relative movement distance between the signal generating component 200 and the signal processing component 300 based on the strength of the signal. The signal generating component 200 includes a second detected element 230, which generates a magnetic field signal (the second detected element 230 is, for example, a magnetic bead), and the signal processing component 300 includes a second sensing unit and a second processing unit that are communicatively connected to each other, the second sensing unit being used to detect the magnetic field signal of the second detected element 230, and the second processing unit being used to obtain the relative movement distance between the second sensing unit and the second detected element 230 based on the strength of the magnetic field signal. It will be understood by those skilled in the art that the strength of the magnetic field signal received by the second sensing unit is different for different axial distances, and thus the relative movement distance between the second sensing unit and the second detected element 230 can be obtained based on the difference in the strength of the magnetic field signal received by the second sensing unit. Specifically, at the beginning, the magnetic field strength at the initial position and the corresponding initial axial relative distance are obtained first, and the corresponding mid-way relative axial distance is obtained based on the magnetic field signal strength detected in real time during the injection process. Subsequently, the relative movement distance between the second sensing unit and the second detected unit can be obtained based on the difference between the mid-way relative axial distance and the initial axial relative distance, and finally the injection dose of the medicinal solution can be obtained.

[0079] In one embodiment, the second detected element 230 and the second sensing unit are both located on the axis of the pen body 110. During the relative motion between the pen cap 120 and the pen body 110, the second sensing unit and the second detected element 230 remain on the axis of the pen body 110. The second sensing unit detects the magnetic signal of the second detected element 230 in real time, and thus determines the relative distance between the two, and thus the relative movement distance.

[0080] In another embodiment, referring to FIG. 10 , there are multiple second detected elements 230 , and the multiple second detected elements 230 are arranged circumferentially and spaced apart around the axis of the pen body 110. Preferably, the multiple second detected elements 230 are evenly spaced apart around the axis of the pen body 110. The radial distances between the second sensing unit and the second detected element 230 and the axis of the pen body 110 are equal, so that during the relative movement of the pen cap 120 and the pen body 110, the second sensing unit and the second detected element 230 can be opposite to each other along the axial direction of the pen body 110. In this way, when the second sensing unit and the second detected element 230 are opposite to each other in the axial direction of the pen body 110, the axial relative distance between the second sensing unit and the second detected element 230 can be determined based on the maximum intensity of the magnetic field signal detected by the second sensing unit.

[0081] The magnetic field strength is inversely proportional to the distance. For example, when the axial distance between the second detected object and the second sensing unit is 3mm, the magnetic field strength detected by the second sensing unit is 572.8887GS; when the axial distance between the second detected object and the second sensing unit is 3.2mm, the magnetic field strength detected by the second sensing unit is 515.6523GS; when the axial distance between the second detected object and the second sensing unit is 3.4mm, the magnetic field strength detected by the second sensing unit is 468.7976GS; when the axial distance between the second detected object and the second sensing unit is 3.6mm, the magnetic field strength detected by the second sensing unit is 426.2322GS. In practice, the second sensing unit of this embodiment can detect a magnetic field strength of 0.1GS. Different magnetic field strengths correspond to different distance information. After filtering out a small number of individual differences of magnetic beads (the second detected element 230) and 0.5GS of the earth's magnetic field noise, the distance information corresponding to the detected magnetic field strength can be accurate to a distance error of 0.1mm. After noise reduction and filtering of the signal, the strength of the detected magnetic field signal can fully meet the accuracy requirements of the distance error.

[0082] Regarding the specific manner in which the signal processing component 300 determines the relative distance between the signal processing component 300 and the signal generating component 200 based on the number of signals, referring to FIG10 , the signal generating component 200 includes a plurality of second detected elements 230, which are evenly spaced about the axis of the pen body 110. The signal processing component 300 includes a second sensing unit and a second processing unit. The radial distances of the second sensing unit and the second detected elements 230 from the axis of the pen body 110 are equal, so that during the relative movement of the pen body 110 and the pen cap 120, the second sensing unit and the second detected elements 230 can be opposite to each other in the axial direction of the pen body 110. Furthermore, when the second sensing unit and the second detected element 230 are opposite to each other in the axial direction of the pen body 110, the second sensing unit outputs a second detection signal to the second processing unit. The second processing unit is configured to determine the relative movement distance between the second sensing unit and the second detected element 230 based on the number of times the second detection signal is received. Preferably, each time the second detection signal is received, the relative movement distance can be considered to have increased by a set distance unit. The increasing distance unit can be obtained according to the number of received signals, thereby directly obtaining the relative movement distance between the second sensing unit and the second detected unit.

[0083] In one embodiment, the second detected element 230 is a light reflector, with multiple light reflectors spaced evenly around the axis of the pen body 110. The second sensing unit is a photoelectric sensor. When the second detected element 230 and the second sensing unit are axially opposed to each other, the light beam from the photoelectric sensor is reflected, causing the internal circuit of the photoelectric sensor to form a closed loop, thereby outputting a second detection signal to the second processing unit. When the second detected element 230 and the second sensing unit are not axially opposed to each other, the internal circuit of the photoelectric sensor is disconnected, and the second detection signal cannot be output to the second processing unit.

[0084] It should be noted that the design of the mechanical reception of the signal generating component 200 and the signal processing component 300 needs to ensure that there is no structure that blocks light or no structure that blocks magnetic signals between the second detected element 230 and the second sensing unit when they are opposite to each other in the axial direction of the pen body 110.

[0085] Regarding the installation method of the second detected element 230, the first sensor unit 310 and the second processing unit, refer to Figure 9. The signal generating component 200 also includes a shell-shaped third mounting member 240, and the second detected element 230 is arranged in the third mounting member 240. The signal processing component 300 also includes a shell-shaped fourth mounting member 340, and the second sensor unit and the second processing unit are both arranged in the fourth mounting member 340; one of the third mounting member 240 and the fourth mounting member 340 is used to be set on the pen cap 120, and when pressed, is used to transmit pressure to the button 121 of the pen cap 120, and rotate synchronously with the rotating body 122 of the pen cap 120; the other of the third mounting member 240 and the fourth mounting member 340 is set on the pen body 110. For example, one of the third mounting member 240 and the fourth mounting member 340 is used to be sleeved (sleeved) on the outer periphery of the pen cap 120 to achieve a detachable connection with the pen cap 120, and the other of the third mounting member 240 and the fourth mounting member 340 is used to be clamped on the pen body 110.

[0086] In an exemplary embodiment, third mounting member 240 is mounted on pen cap 120. When pressed, third mounting member 240 transmits pressure to button 121 of pen cap 120, thereby injecting liquid medicine. The manner in which second detection element 230 is disposed within third mounting member 240 can be referred to as the manner in which first detection element 210 is disposed on connector 221 and housed within housing 222 in Embodiment 1, and will not be further described here.

[0087] In an exemplary embodiment, the fourth mounting member 340 is clipped onto the pen body 110. Specifically, referring to Figure 11 , the fourth mounting member 340 includes a positioning portion 342 and a clipping portion 341. When the fourth mounting member 340 is mounted on the pen body 110, the positioning portion 342 positions the fourth mounting member 340 relative to the upper edge of the pen body 110 (i.e., the end of the pen cap 120 facing the pen cap 120). The clipping portions 341 on either side clip the fourth mounting member 340 to the outer wall of the pen body 110. The second processing unit is disposed within the fourth mounting member 340. The structure of the second processing unit can be roughly described with reference to the main board portion 321 in the first embodiment and will not be further described here.

[0088] Based on the description of the injection dose collection device in the above embodiment 1 and embodiment 2, the injection dose collection device of the present invention further includes at least one of the following preferred embodiments.

[0089] (1) The injection dose collection device also includes a control module, which is connected to the signal processing component 300 and is used to control the on / off of the circuit inside the signal processing component 300, so that the signal processing component 300 receives or rejects the signal of the signal generating component 200. Specifically, when the signal processing component 300 needs to receive the signal of the signal generating component 200, the control module connects the circuit of the signal processing component 300. When the signal processing component 300 does not need to receive the signal of the signal generating component 200, the control module shuts down the circuit of the signal processing component 300, so as to save the power consumption of the injection dose collection device. For example, the control module includes the pot piece and the second circuit board in the first embodiment. In some other embodiments, the control module can also be a switch element provided on the signal generating component 200, and the switch element is used to directly control whether the battery 3212 supplies power to the first sensing unit 310 (second sensing unit). The control module can also be a sensor, including a pressure sensor, a biosensor (such as a temperature sensor, a fingerprint sensor), etc. After the pressure sensor detects the user's pressing force, it connects the circuit inside the signal processing component 300 to receive the signal of the signal generating component 200. The biosensor can not only meet the need to control the connection and disconnection of the circuit of the signal processing component 300, but on the other hand, the biosensor can detect false triggering during non-user operations through biometric identification. When the user is injecting the drug solution, the biosensor performs biometric identification to trigger the connection of the circuit of the signal processing component 300. If the object identified by the biosensor is not a biological body, the biosensor will not trigger the connection of the circuit of the signal processing component 300, thereby achieving the effect of preventing false triggering.

[0090] Preferably, the control module includes a touch element 360, which is electrically connected to the signal processing component 300. The touch element 360 is configured to control the circuit connectivity of the signal processing component 300 upon detecting a touch action. Specifically, after detecting a touch action signal, the touch element 360 controls the circuit connectivity of the signal processing component 300 to ensure that the signal processing component 300 is powered on, thereby enabling the signal processing component 300 to initiate signal acquisition and processing from the signal generating component 200 and subsequently output injection dosage information. It should be noted that the touch element 360 is touched before the injection of the drug solution, that is, before the pen cap 120 and the pen body 110 generate relative motion, the touch element 360 is used to power the signal processing component 300. More specifically, the touch element 360 is used to ensure that the signal processing component 300 is powered on before the pen cap 120 is pressed. This embodiment does not limit the type of touch element. The touch element may be, for example, a capacitive touch element, a resistive touch element, an infrared sensing touch element, or an optical touch element.

[0091] It should be noted that when the touch element 360 of this embodiment detects a touch action, the signal processing component 300 can be powered on and enter a standby state, and after the standby state lasts for the set standby time, the power will be automatically cut off. In other words, the user does not need to continuously apply the touch action to keep the signal processing component 300 powered on. Only one touch action is required to power on the system immediately, and the power-on time lasts for the set standby time, after which the system will automatically power off. Regarding the setting of the standby time, it is understandable that the standby time needs to be greater than the injection time of the liquid medicine, so that the signal processing component 300 can be continuously powered on and the complete liquid medicine injection information can be recorded.

[0092] In one embodiment, in combination with the first embodiment, referring to Figures 1 and 2, the signal generating component 200 and the signal processing component 300 are both located at the pen cap 120, and the signal generating component 200 and the signal processing component 300 are rotationally connected. One of the signal generating component 200 and the signal processing component 300 is used to connect to the rotating body 122 of the pen cap 120 and can drive the rotating body 122 of the pen cap 120 to rotate, thereby adjusting the injection dose size and rotating when injecting the drug solution. The other is used to transmit pressure to the button 121 of the pen cap 120 to inject the drug solution. The other of the signal generating component 200 and the signal processing component 300 has a pressing shell 331. The touch element 360 is disposed in the pressing shell 331 and is located at the end of the pressing shell 331 away from the pen body 110 along the axial direction of the pen body 110, that is, the touch element 360 is located on the inner side of the top of the pressing shell 331 for easy touch by the user. Thus, when a user touches the top of the push-button housing 331, the touch-sensitive element 360 detects the touch and immediately responds by connecting the circuitry within the signal processing assembly 300, preparing to receive and process signals. This puts the signal processing assembly 300 into a standby state. Once the signal processing assembly 300 enters the standby state, the user can then apply force to press the push-button housing 331, thereby transmitting pressure to the button 121 on the pen cap 120 to inject the liquid medicine.

[0093] Specifically, in conjunction with Figures 2 and 3, the switch part 322 is used as an example of the touch element 360. The touch element 360 is installed on the support base 332 and is located in the pressing shell 331, and the touch element 360 is located at the top of the pressing shell 331. After the top of the pressing shell 331 is touched by the user, the touch element 360 detects the touch action and will respond immediately. The touch element 360 will connect the circuit on the main board part 321 to ensure that the battery 3212 supplies power to the sensor, so that the sensor can start working to detect the magnetic field signal. Furthermore, when the touch element 360 connects the circuit, the status indication module (such as the indicator light 350) configured in this embodiment will remind the user that the system is powered on successfully. That is, this embodiment uses a touch mode to trigger the power-on of the signal processing component 300, rather than the traditional pot-type press-type triggering power-on method.

[0094] In another embodiment, and in combination with the second embodiment, referring to Figures 8 and 9, one of the signal generating component 200 and the signal processing component 300 is disposed on the pen body 110, and the other is disposed on the pen cap 120, and is capable of driving the pen cap 120 to rotate. The touch element 360 is disposed inside the one of the signal generating component 200 and the signal processing component 300 disposed on the pen cap 120, and is located at an end of the one of the signal generating component 200 and the signal processing component 300 disposed on the pen cap 120 that is away from the pen body 110 along the axial direction of the pen body 110, that is, the touch element 360 is located on the inner side of the top end of the one of the signal generating component 200 and the signal processing component 300 disposed on the pen cap 120. In this way, the one of the signal generating component 200 and the signal processing component 300 disposed on the pen cap 120 is first powered on by the touch element 360, and then transmits pressure to drive the injection pen 100 to inject the drug solution. Specifically, when the signal generating component 200 is set on the pen cap 120, the touch element 360 is set on the inner side of the top of the shell-shaped third mounting part 240 of the signal generating component 200 (as shown in Figure 8). First touch the top of the third mounting part 240 to trigger the touch element 360 to ensure that the system is powered on, and then press the third mounting part 240 to perform the injection of the medicine; when the signal processing component 300 is set on the pen cap 120, the touch element 360 is set on the inner side of the top of the shell-shaped fourth mounting part 340 of the signal processing component 300. First touch the top of the fourth mounting part 340 to trigger the touch element 360 to ensure that the system is powered on, and then press the fourth mounting part 340 to perform the injection of the medicine. In this way, by touching the top of the third mounting member 240 or the fourth mounting member 340 (i.e., the top along the axial direction of the pen body 110), the user can make the touch element 360 on the inner side of the top of the third mounting member 240 or the fourth mounting member 340 detect the user's touch action, and then immediately respond and connect the circuit on the main board part 321, thereby ensuring that the battery 3212 powers on the sensor inside the signal processing component 300, and then applies pressure to the third mounting member 240 or the fourth mounting member 340 corresponding to the pen cap 120 to perform the injection of the liquid medicine.

[0095] Of course, the touch element 360 may also be disposed inside the one of the signal generating assembly 200 and the signal processing assembly 300 disposed on the pen body 110, and located at an end of the one of the signal generating assembly 200 and the signal processing assembly 300 disposed on the pen body 110 that is away from the pen body 110 in the radial direction of the pen body 110, that is, the touch element 360 is located on the lateral top side inside the one of the signal generating assembly 200 and the signal processing assembly 300 disposed on the pen body 110. Specifically, when the signal generating assembly 200 is disposed on the pen body 110, the touch element 360 is disposed on the lateral top side inside the third shell-shaped mounting member 240 of the signal generating assembly 200; when the signal processing assembly 300 is disposed on the pen body 110, the touch element 360 is disposed on the lateral top side inside the fourth shell-shaped mounting member 340 of the signal processing assembly 300 (as shown in FIG. 9 ). In this way, by touching the lateral top of the third mounting member 240 or the fourth mounting member 340, the touch element 360 on the lateral top side inside the third mounting member 240 or the fourth mounting member 340 can detect the user's touch action, and then immediately respond and connect the circuit on the main board part 321, thereby ensuring that the battery 3212 powers on the sensor inside the signal processing component 300.

[0096] Figure 12 is a flowchart of the workflow of a drug injection system according to one embodiment of the present invention. After the touch element 360 detects a trigger signal from a finger, it immediately responds by connecting the system's internal circuits, ensuring rapid system power-up (the power-up status can be observed via the indicator light 350). The sensor also powers up simultaneously and enters a standby state after initialization. Pressing the touch element 360, i.e., applying pressure to the pressing housing 331 exceeding the injection pen's set infusion force, causes the pen cap 120 to spiral downward, thereby injecting insulin. Simultaneously, the sensor detects information such as the rotation of the magnet and the strength of the magnetic field signal. After the insulin injection is complete, the user ceases pressing pressure, and the sensor transmits the recorded information to the processor, ultimately determining the insulin pen's injection dose. After the drug injection is complete, the system powers down. Furthermore, the system according to this embodiment also features a data keepalive function. Specifically, upon completion of the insulin injection, the system powers down. The system can activate the data keepalive function as needed, setting a system keepalive time to ensure that the system's local storage module uploads the sensor-recorded information to the cloud server within this time.

[0097] Considering that the current insulin injection pen system basically uses a press-type component to activate the circuit inside the signal processing component 300, for example, the triggering method described in embodiment 1 is used, that is, the user applies force to the pressing shell 331, so that the pressing shell 331 is deformed and contacts the pot piece (here, the switch part 322 is used as the pot piece), and continues to apply force to press the pot piece, which connects the circuit on the main board and allows the battery 3212 to power the sensor. In other words, it can be considered that the current operation of the injection pen 100 applies two stages of pressing force. The first stage of pressing force is used to press the pot piece to ensure that the internal circuit is connected, and the second stage of pressing force is used to perform the insulin injection operation after the internal circuit is connected (i.e., the spiral descent of the pen cap 120). If the pressing force required in the first stage is too high, it can easily cause system power-on lag, affecting the signal processing component 300's ability to detect and process the signal from the signal generating component 200, further affecting the accuracy of the converted injection dose information. Specifically, if the pressure in the first stage is too high and greater than the pen's own infusion force, the pen may have already begun injecting insulin before the system is powered on, but the sensor has not yet powered on. This sensor power-on lag affects the sensor's accuracy in detecting the magnet's rotation angle, resulting in incomplete recording of the rotation angle information output by the sensor and missing bits, causing the detected rotation angle to be too small, and thus inaccurately converting the injection dose. If the pressing force required in the first stage is too low, it can easily cause the system's internal circuits to be mistakenly connected, causing the system to be mistakenly triggered, affecting the authenticity of the injection dose information.

[0098] Compared to existing insulin pen systems that rely on a press-type element to trigger system power-up, this embodiment utilizes a touch element 360 to control system power-up prior to insulin injection. Simply detecting a user touch via the touch element 360 allows the system to power up immediately. The touch element 360 offers fast response and high sensitivity, eliminating the need for a pressing force to power up the system. This ensures rapid system power-up and avoids the common prior art practice of requiring excessive pressure to trigger system power-up, resulting in power-up delays and missing codes, leading to inaccurate injection dose information detection. Furthermore, this avoids situations where excessive pressure, exceeding the pen's own infusion force, causes the pen to initiate insulin injection but the system has not yet detected power-up, resulting in sensor power-up delays and missing sensor data at the moment of power-up, thus reducing data detection accuracy. Furthermore, the touch element 360 of this embodiment avoids situations where a conventional microswitch requires too little triggering force to power up, leading to erroneous system power-up and data being recorded.

[0099] Therefore, the touch element of this embodiment uses a way of conducting the circuit to replace the traditional way of applying external force or moving physical parts (such as electrical contact design) to trigger the system to power on. That is, the existing technology requires applying external force to make the physical parts contact the contacts on the circuit to connect the circuit. It gets rid of the requirement for the size of the pressing force value, solves the matching problem of the large difference in the pushing force of different insulin pens, and stabilizes the working stability of the injection dose collection device of this embodiment in cooperation with different injection pens. Compared with the existing technology that requires the user to apply pressing force to power on and inject insulin, the touch detection power-on method of the injection dose collection device of this embodiment will not affect the working method of the injection pen to inject insulin by pressing, ensuring that the injection dose collection device of this embodiment can be adapted to different injection pens.

[0100] In summary, the location for triggering the signal processing component 300 to power on and the location for triggering the initiation of injection of the medicinal solution in the injection dose collection device of this embodiment may be the same as or different from the location for triggering the initiation of injection of the medicinal solution. For example, the location for triggering the signal processing component 300 to power on and the location for triggering the initiation of injection of the medicinal solution may both be located at the axial top of the pressing shell 331 on the pen cap 120. Specifically, the signal processing component 300 may be powered on by pressing the pressing shell 331 on the pen cap 120 in a conventional press-to-power-on manner, or by touching the pressing shell on the pen cap 120 in the aforementioned touch-to-power-on manner. Further, pressure may be applied to the pressing shell 331 to initiate injection of the medicinal solution. For example, referring to Figures 8 and 9, the position for triggering the signal processing component 300 to be powered on is at the lateral top of the fourth mounting piece 340 on the pen body. The signal processing component 300 can be powered on by the traditional press-type power-on method or the above-mentioned touch-type power-on method. The position for triggering the start of injection of the liquid medicine is located at the axial top of the third mounting piece 240 on the pen cap 120, and the liquid medicine is injected by the press-type injection method.

[0101] Furthermore, the action used to trigger the signal processing component 300 to power on in the injection dose collection device may be the same as or different from the action used to trigger the initiation of medication injection. For example, both the power-on and insulin injection actions are performed by conducting pressure, i.e., a push-on and push-injection method. Furthermore, when the action used to trigger the signal processing component 300 to power on is different from the action used to trigger the initiation of medication injection, the action used to trigger the signal processing component 300 to power on is tissue contact, i.e., the aforementioned touch-on method, and the action used to trigger the initiation of medication injection is a force press, i.e., applying pressure to the button 121 of the pen cap 120 to cause the pen cap 120 to spiral downward, thereby injecting medication. It can be understood that when the position where the trigger signal processing component 300 is powered on is located on the pressing shell 331 at the pen cap 120 and the electric power is used as tissue touch, during the touch-type power-on process, the touch force is far lower than the infusion force of the injection pen 100 itself, and will not cause the pen cap 120 to spiral down. It is necessary to further increase the applied pressing force until it is greater than the infusion force of the injection pen 100 itself, and the pen cap 120 spirals down to inject the medicine.

[0102] (2) The injection dose collection device also includes a timing module, which detects the relative movement time between the pen cap 120 and the pen body 110 to obtain the injection time of the current injection of the medicinal solution, or detects the time when the internal circuit of the signal processing component 300 is connected to obtain the injection time of the current injection of the medicinal solution. If the recorded injection time exceeds a set time threshold, the signal processing component 300 will no longer detect the signal of the signal generating component 200, and the device will generate an alarm signal.

[0103] (3) The injection dosage collection device also includes a storage module, and the information of the injection dosage of the liquid medicine and the information of the injection time can be stored in the storage module.

[0104] (4) The injection dose collection device further includes a communication module, including a wired communication unit and a wireless communication unit. The wireless communication unit includes but is not limited to a Bluetooth, ZigBee unit, and a wireless broadband (Wi-Fi) unit, and the wired communication unit includes but is not limited to a serial communication unit and a USB interface communication unit. The communication module is used to transmit the injection dose data and injection time information of the drug to an external device. Specifically, after the information such as the infusion dose and time of the drug solution is collected by the signal processing component 300, it can be stored in the storage module; the data can also be sent to a server or client through the communication module, which can facilitate the management and analysis of the daily injection record.

[0105] (5) The injection dose collection device also includes a reminder module for reminding the user to inject. For example, the doctor can set the dosage, interval time, and other information of a single injection for the reminder module through the mobile phone. When the required injection time is recorded, the reminder module sends this information to the mobile phone of the patient or the patient's family through the communication module to notify the patient or family to inject the liquid medicine in time to avoid affecting the patient's health.

[0106] (6) The injection dose collection device also includes a temperature alarm module. When the liquid in the injection pen 100 and the injection pen 100 are exposed to a temperature condition higher than a preset threshold, the temperature alarm module is triggered to generate a temperature alarm signal, prompting the doctor to place the injection pen 100 in a safe environment.

[0107] (7) The injection dose collection device further includes a status indicator module, which is used to indicate the operating status of the injection pen 100, such as indicating that a drug injection operation is currently in progress, that the injection dose collection device is powered on, or that the injection operation is complete. In one embodiment, the status indicator module includes an indicator light 350 (shown in Figures 2 and 3). The indicator light 350 can be integrally injection-molded with the pressing shell 331. The indicator light 350 indicates changes in the corresponding operating status of the injection pen 100 or the injection dose collection device through changes in color, flashing frequency, etc.

[0108] (8) The injection dose collection device also includes a self-learning module. The self-learning module is constructed so that after the signal processing component 300 processes a certain amount of data such as injection dose, injection time, etc., the self-learning module automatically starts and learns to record the corresponding information. When the signal processing component 300 cannot collect the injection dose information of the liquid medicine to be injected this time, the self-learning module starts to alarm and prompt injection, and at the same time displays the dosage guide for this time based on the injection dose status of the same period in history and the day.

[0109] Although the present invention is disclosed above with reference to preferred embodiments, the above embodiments are not intended to limit the present invention. Any person skilled in the art can utilize the above disclosed technical content to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment with equivalent changes. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of protection of the technical solution of the present invention.

Claims

1. An injection dose collection device for use on an injection pen, wherein the injection pen comprises a pen body and a pen cap disposed at one axial end of the pen body, wherein the pen cap can rotate about the axis of the pen body and simultaneously move along the axial direction of the pen body to inject the liquid medicine in the pen body outward, characterized in that: The injection dose collection device includes a signal generating component and a signal processing component; The signal generating component and the signal processing component are used to synchronously generate relative movement of the pen body in the axial direction and / or relative rotation around the axis of the pen body along with the relative movement between the pen cap and the pen body; The signal processing component is used to collect the signal generated by the signal generating component, and obtain the relative movement distance and / or relative rotation angle between the signal processing component and the signal generating component based on the characteristic parameters of the signal, thereby obtaining the injection dose of the medicine based on the relative movement distance and / or relative rotation angle.

2. The injection dose collection device according to claim 1, characterized in that: The relative movement between the signal generating component and the signal processing component includes relative rotation around the axis of the pen body; The signal generating component and the signal processing component are rotatably connected to each other. One of the signal generating component and the signal processing component is used to connect to the pen cap and drive the pen cap to rotate, and the other is used to transmit pressure to the button of the pen cap to inject the liquid medicine. The signal processing component is configured to obtain a relative rotation angle between the signal processing component and the signal generating component based on the quantity of the received signal or the change in the field distribution of the signal from the signal generating component.

3. The injection dose collection device according to claim 2, characterized in that: The signal generating assembly includes a plurality of first detected elements, and the plurality of first detected elements are evenly arranged circumferentially around the axis of the pen body; The signal processing component includes a first sensing unit and a first processing unit, and the radial distances between the first sensing unit and the first detected element and the axis of the pen body are equal; when the first sensing unit and the first detected element are relative to each other along the axial direction of the pen body, the first sensing unit outputs a first detection signal to the first processing unit, and the first processing unit is configured to obtain the relative rotation angle between the first sensing unit and the first detected element based on the number of times the first detection signal is received.

4. The injection dose collection device according to claim 3, characterized in that: The first detected element is a single magnet, and the first sensing unit is a magnetic sensor; Alternatively, the first detected element is a light reflecting element, and the first sensing unit is a photoelectric sensor; Alternatively, the first sensing unit is one or more of a Hall sensor and a mechanical sensor.

5. The injection dose collection device according to claim 2, characterized in that: The signal generating assembly includes a first detected element, which is a ring magnet and is used to be coaxially arranged with the axis of the pen body; The processing component includes a first sensing unit and a first processing unit that are communicatively connected to each other. The first sensing unit is used to be arranged on the axis of the pen body to detect the magnetic field distribution of the first detected element. The first processing unit is used to obtain the relative rotation angle between the first sensing unit and the first detected element based on the change in the magnetic field distribution of the annular magnet.

6. The injection dose collection device according to claim 3 or 5, characterized in that: The signal generating assembly further includes a first mounting member, on which the first detected element is disposed. The signal processing assembly further includes a second mounting member, on which the first sensing unit and the first processing unit are both disposed. The first mounting member and the second mounting member are rotatably connected to each other. One of the first mounting member and the second mounting member is used to connect with the pen cap and can drive the pen cap to rotate, and the other is used to transmit pressure to the button of the pen cap when pressed to inject the liquid medicine.

7. The injection dose collection device according to claim 6, characterized in that: One of the first mounting member and the second mounting member used for connecting to the pen body is a rotating member, and the other is a fixed member; the rotating member includes a connecting seat and a shell connected to the connecting seat, the connecting seat is connected to the fixed member, and the shell is used to be mounted on the outer periphery of the pen cap, and the corresponding first detected element or the first sensing unit is arranged on the connecting seat.

8. The injection dose collection device according to claim 7, characterized in that: The first mounting member is the rotating member, and the connecting seat has a first through hole extending therethrough; The inner wall of the first through hole extends radially inward to form an extension portion, and the extension portion extends in a ring shape along the circumference of the first through hole, and the first detected element, which is a ring magnet, is disposed on the extension portion; And / or, the inner wall of the first through hole is recessed radially outward to form a receiving groove, and there are multiple receiving grooves, which are evenly spaced in sequence along the circumference of the first through hole, and multiple first detection elements are arranged in each of the receiving grooves in sequence.

9. The injection dose collection device according to claim 6, characterized in that: One of the first mounting member and the second mounting member used to connect with the pen body is a rotating member, and the other is a fixed member; the fixed member includes a pressing shell and a support seat, the pressing shell is sleeved on the support seat, the corresponding first detected element or the first sensing unit is arranged on the support seat, the support seat is rotatably connected to the rotating member, and the pressing shell is used to transmit pressure to the button of the pen cap when it is axially pressed.

10. The injection dose collection device according to claim 9, characterized in that: The second mounting member is the fixing member; the support seat has a second through hole extending therethrough, and a plurality of first limiting portions and a plurality of second limiting portions are formed on an inner wall of the second through hole. The plurality of first limiting portions are arranged along the circumference of the second through hole, and the plurality of second limiting portions are arranged along the circumference of the second through hole. The first limiting portions and the second limiting portions are spaced apart in the axial direction of the second through hole, and the first limiting portions are closer to the first mounting member; The first processing unit includes a main board portion and a switch portion, the first sensing unit is integrated on the main board portion, the main board portion is arranged on the first limiting portion, and the switch portion is arranged on the second limiting portion. When the pressing shell is pressed, the switch portion will be triggered, so that the switch portion will start the main board portion to detect the signal of the first detected element through the first sensing unit.

11. The injection dose collection device according to claim 1, characterized in that: The relative movement between the signal generating component and the signal processing component includes relative movement in the axial direction of the pen body; One of the signal generating component and the signal processing component is used to be disposed on the pen cap, and is used to transmit pressure to the pen cap to drive the pen cap to rotate around the axis of the pen body and synchronously move along the axial direction of the pen body; the other of the signal generating component and the signal processing component is used to be disposed on the pen body; The signal processing component is configured to obtain a relative movement distance between the signal processing component and the signal generating component based on the strength or amount of the signal received from the signal generating component.

12. The injection dose collection device according to claim 11, characterized in that: The signal generating component includes a second detected element, and the second detected element generates a magnetic field signal; The signal processing component includes a second sensing unit and a second processing unit that are communicatively connected to each other, the second sensing unit is used to detect the magnetic field signal of the second detected element, and the second processing unit is used to obtain the relative movement distance between the second sensing unit and the second detected element based on the intensity of the magnetic field signal.

13. The injection dose collection device according to claim 12, characterized in that: The second detected element and the second sensing unit are both located on the axis of the pen body; Alternatively, there are multiple second detected elements, and the multiple second detected elements are arranged around the axis of the pen body, and the radial distances between the second sensing unit and the second detected elements and the axis of the pen body are equal.

14. The injection dosage collection device according to claim 11, characterized in that: The signal generating component includes a plurality of second detected elements, and the plurality of second detected elements are evenly arranged circumferentially around the axis of the pen body; The signal processing component includes a second sensing unit and a second processing unit, and the radial distances between the second sensing unit and the second detected element and the axis of the pen body are equal; when the second sensing unit and the second detected element are relative to each other along the axial direction of the pen body, the second sensing unit outputs a second detection signal to the second processing unit, and the second processing unit is used to obtain the relative movement distance between the second sensing unit and the second detected element based on the number of times the second detection signal is received.

15. The injection dose collection device according to claim 14, characterized in that: The second detected element is a light reflecting element, and the second sensing unit is a photoelectric sensor.

16. The injection dose collection device according to claim 12 or 14, characterized in that: The signal generating assembly further includes a shell-shaped third mounting member, in which the second detected element is disposed. The signal processing assembly further includes a shell-shaped fourth mounting member, in which the second sensing unit and the second processing unit are both disposed. One of the third mounting member and the fourth mounting member is used to be set on the pen cap and is used to transmit pressure to the pen cap when pressed; the other of the third mounting member and the fourth mounting member is used to be set on the pen body.

17. The injection dose collection device according to claim 16, characterized in that: One of the third mounting member and the fourth mounting member is used for sleeve-mounted on the outer periphery of the pen cap, and the other of the third mounting member and the fourth mounting member is used for clamping on the pen body.

18. The injection dosage collection device according to claim 1, characterized in that: The injection dose collection device further includes a touch element, which is configured to control the circuit connection of the signal processing component by detecting a touch action before the pen cap and the pen body generate relative movement, so as to power on the signal processing component.

19. The injection dose collection device according to claim 18, characterized in that: The signal generating component and the signal processing component are rotatably connected, and one of the signal generating component and the signal processing component is connected to the pen cap and can drive the pen cap to rotate; the other of the signal generating component and the signal processing component has a pressing shell, and the touch element is disposed in the pressing shell and is located at an end of the pressing shell away from the pen body along the axial direction of the pen body; Alternatively, one of the signal generating component and the signal processing component is arranged on the pen body, and the other of the signal generating component and the signal processing component is arranged on the pen cap and can drive the pen cap to rotate; the touch element is arranged inside the one of the signal generating component and the signal processing component that is arranged on the pen cap, and is located at one end of the signal generating component and the signal processing component that is arranged on the pen cap away from the pen body along the axial direction of the pen body; or, the touch element is arranged inside the one of the signal generating component and the signal processing component that is arranged on the pen body, and is located at one end of the signal generating component and the signal processing component that is arranged on the pen body away from the pen body along the radial direction of the pen body.

20. The injection dose collection device according to claim 18, characterized in that: The touch element is a capacitive touch element, a resistive touch element, an infrared sensing touch element or an optical touch element.

21. The injection dose collection device according to claim 1, characterized in that: The position in the injection dose collection device for triggering the power-on of the signal processing component is the same as or different from the position for triggering the start of injection of the liquid medicine; and / or, The action for triggering the power-on of the signal processing component in the injection dose collection device is the same as or different from the action for triggering the start of injection of the medicine, and when the action for triggering the power-on of the signal processing component is different from the action for triggering the start of injection of the medicine, the action for triggering the power-on of the signal processing component is tissue touching, and the action for triggering the start of injection of the liquid medicine is force pressing.

22. A liquid medicine injection system, characterized in that: include: An injection pen comprising a pen body and a pen cap disposed at one axial end of the pen body, wherein the pen cap can rotate around the axis of the pen body and simultaneously move along the axial direction of the pen body to inject the liquid medicine in the pen body outward; The injection dose collection device according to any one of claims 1 to 21, wherein at least one of the signal generating component and the signal processing component is located on the pen cap.

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