Liquid medicine injection system and injection dose collecting device thereof

Abstract

The utility model provides a liquid medicine injection system and an injection dose collecting device thereof. According to the injection dosage acquisition device, the signal generation assembly and the signal processing assembly are configured by utilizing the characteristic of relative movement between the pen cap and the pen body of the injection pen, so that the signal generation assembly and the signal processing assembly are synchronous and also can generate relative movement; the relative movement between the signal generating assembly and the signal processing assembly is matched with the relative axial movement and / or relative rotation between the pen body and the pen cap, so that signals of the signal generating assembly are acquired through the signal processing assembly; according to the utility model, the signal generating assembly and the signal processing assembly are arranged on the basis of the characteristic parameters of the signal, the relative motion information between the signal generating assembly and the signal processing assembly is obtained based on the characteristic parameters of the signal, the injection dosage of the liquid medicine is obtained based on the relative motion information of the electric signal, subsequent data recording and analysis are facilitated, and the electronization and intellectualization of the recording function of the injection dosage of the liquid medicine can be ensured.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a drug injection system and its injection dose acquisition device. Background Technology

[0002] For most diabetic patients, insulin injection is the routine and mainstream treatment. Currently, the most common methods are automatic infusion via insulin pump or insulin pen injection to control blood sugar. Compared to the relatively expensive insulin pump, many diabetic patients choose to use the inexpensive insulin pen, which is characterized by its ease of use, portability, precise dosage, minimal pain, and reliable operation.

[0003] Currently, mainstream insulin pens on the market include products from brands such as Libang, Wanbang, Gan & Lee, Xiulin, and Sanofi. These passive insulin pens share a common design feature: dosage is set by rotating the pen cap, with each 360° rotation divided into a certain number of dose units (e.g., 24 dose units). During injection, the physician manually presses the cap at one end of the insulin pen, causing the cap to rotate and advance synchronously.

[0004] Currently, mainstream insulin pens lack electronic and intelligent functions such as infusion volume recording and reminder functions, making it difficult to provide physicians with accurate infusion records and thus hindering the development of more precise treatment plans. Utility Model Content

[0005] The purpose of this invention is to provide a drug injection system and its injection dose acquisition device to solve the problem that the current mainstream insulin pens do not have electronic and intelligent drug injection dose recording functions, 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-mentioned technical problems, based on one aspect of the present invention, the present invention provides an injection dose acquisition device for being installed on an injection pen. The injection pen includes a pen body and a pen cap disposed at one axial end of the pen body. The pen cap can rotate around the axis of the pen body and move synchronously along the axial direction of the pen body to inject the liquid medicine inside the pen body outward. The injection dose acquisition device includes a signal generation component and a signal processing component.

[0007] The signal generating component and the signal processing component are used to synchronously generate relative movement in the axial direction of the pen body and / or relative rotation about the axis of the pen body in response to the relative movement between the pen cap and the pen body.

[0008] The signal processing component is used to acquire the signal generated by the signal generating component, and to 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 drug solution based on the relative movement distance and / or relative rotation angle.

[0009] Optionally, the relative motion between the signal generating component and the signal processing component includes relative rotation about the axis of the pen body;

[0010] The signal generating component and the signal processing component are rotatably connected. 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, while the other is used to transmit pressure to the button on the pen cap for drug injection.

[0011] 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 field distribution change of the signals.

[0012] Optionally, the signal generating component includes a plurality of first detected elements, which are evenly arranged circumferentially around the axis of the pen body.

[0013] 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 equidistant from the axis of the pen body. When the first sensing unit and the first detected element are opposite each other along the axis of the pen body, the first sensing unit outputs a first detection signal to the first processing unit. 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.

[0014] Optionally, the first detected element is a single magnet, and the first sensing unit is a magnetic sensor;

[0015] Alternatively, the first detected element may be a light reflector, and the first sensing unit may be a photoelectric sensor.

[0016] Alternatively, the first sensing unit may be one or more of a Hall sensor or a mechanical sensor.

[0017] Optionally, the signal generating component includes a first detected element, which is a ring magnet and is configured to be coaxial with the axis of the pen body;

[0018] 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 configured to be disposed on the axis of the pen body to detect the magnetic field distribution of the first detected element. 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 change in the magnetic field distribution of the ring magnet.

[0019] Optionally, the signal generating component further includes a first mounting component, on which the first detected element is disposed; the signal processing component further includes a second mounting component, on which both the first sensing unit and the first processing unit are disposed;

[0020] 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 drive the pen cap to rotate. The other is used to transmit pressure to the button of the pen cap when pressed to inject medicine.

[0021] Optionally, one of the first mounting component and the second mounting component for connecting to the pen body is a rotating component, and the other is a fixing component; the rotating component includes a connecting seat and a sleeve connected to the connecting seat, the connecting seat is connected to the fixing component, the sleeve is used to fit around the outer periphery of the pen cap, and the corresponding first detected element or the first sensing unit is disposed on the connecting seat.

[0022] Optionally, the first mounting component is the rotating component, and the connecting seat has a through first hole;

[0023] The inner wall of the first through hole extends inward along its own radial direction to form an extension, and the extension extends in a ring shape along the circumference of the first through hole. The first detection element of the ring magnet is disposed on the extension.

[0024] And / or, the inner wall of the first through hole is recessed outward along its own radial direction to form a receiving groove, and there are multiple receiving grooves. The multiple receiving grooves are arranged evenly at intervals along the circumference of the first through hole, and the multiple first detection elements are arranged in each of the receiving grooves.

[0025] Optionally, one of the first mounting component and the second mounting component used for connection with the pen body is a rotating component, and the other is a fixing component; the fixing component includes a pressing shell and a support base, the pressing shell is sleeved on the support base, the corresponding first detected element or the first sensing unit is disposed on the support base, the support base is rotatably connected to the rotating component, and the pressing shell is used to transmit pressure to the button of the pen cap when it is axially pressed.

[0026] Optionally, the second mounting member is the fixing member, and the support base has a through second hole. 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 circumferentially along the second through hole, and the plurality of second limiting parts are arranged circumferentially along the second through hole. The first limiting parts and the second limiting parts are spaced apart in the axial direction of the through hole, and the first limiting parts are closer to the first mounting member.

[0027] The first processing unit includes a main board and a switch. The first sensing unit is integrated on the main board. The main board is disposed on the first limiting part, and the switch is disposed on the second limiting part. When the pressing shell is pressed, the switch will be triggered, so that the switch will activate the main board to detect the signal of the first detected element through the first sensing unit.

[0028] Optionally, the relative motion between the signal generating component and the signal processing component includes relative movement along the axial direction of the pen body;

[0029] One of the signal generating component and the signal processing component is 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 move synchronously along the axis of the pen body; the other of the signal generating component and the signal processing component is disposed on the pen body.

[0030] The signal processing component is configured to determine the corresponding infusion dose of the injection pen by obtaining the relative movement distance between the signal processing component and the signal generating component based on the intensity or quantity of the signals received from the signal generating component.

[0031] Optionally, the signal generating component includes a second detected element that generates a magnetic field signal;

[0032] 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 strength of the magnetic field signal.

[0033] Optionally, both the second detected element and the second sensing unit are located on the axis of the pen body;

[0034] Alternatively, there may be multiple second detected elements, and these multiple second detected elements may be arranged around the axis of the pen body, with the second sensing unit and the second detected elements each having an equal radial distance from the axis of the pen body.

[0035] Optionally, the signal generating component includes a plurality of second detected elements, which are evenly arranged circumferentially around the axis of the pen body;

[0036] The signal processing component includes a second sensing unit and a second processing unit. The second sensing unit and the second detected element are each equidistant from the axis of the pen body. When the second sensing unit and the second detected element are opposite each other along the axis of the pen body, the second sensing unit outputs a second detection signal to the second processing unit. 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.

[0037] Optionally, the second detected element is a light reflector, and the second sensing unit is a photoelectric sensor.

[0038] Optionally, the signal generating component further includes a shell-shaped third mounting member, in which the second detected element is disposed, and the signal processing component further includes a shell-shaped fourth mounting member, in which both the second sensing unit and the second processing unit are disposed.

[0039] One of the third and fourth mounting members is disposed on the pen cap and is used to transmit pressure to the pen cap when pressed; the other of the third and fourth mounting members is disposed on the pen body.

[0040] One of the third and fourth mounting components is used to fit around the outer periphery of the pen cap, and the other of the third and fourth mounting components is used to snap onto the pen body.

[0041] Optionally, the injection dose acquisition device further includes a touch element that, when touched, controls the circuit connection of the signal processing component. That is, the touch element is configured to detect the touch action and control the circuit connection of the signal processing component to power on the signal processing component before the pen cap and the pen body generate relative movement.

[0042] Optionally, the signal generating component and the signal processing component are rotatably connected, 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 located at one end of the pressing shell away from the pen body along the axial direction of the pen body;

[0043] Alternatively, one of the signal generating component and the signal processing component may be disposed on the pen body, and the other may be disposed on the pen cap, and the pen cap may be rotated. The touch element may be disposed inside the one of the signal generating component and the signal processing component disposed on the pen cap, and located at the end of the one of the signal generating component and the signal processing component disposed on the pen cap that is away from the pen body along the axial direction of the pen body; or, the touch element may be disposed inside the one of the signal generating component and the signal processing component disposed on the pen body, and located at the end of the one of the signal generating component and the signal processing component disposed on the pen body that is away from the pen body along the radial direction of the pen body.

[0044] Optionally, the touch element is a capacitive touch element, a resistive touch element, an infrared sensing touch element, or an optical touch element.

[0045] Optionally, the location in the injection dose acquisition device used to trigger the power-on of the signal processing component may be the same as or different from the location used to trigger the start of drug injection.

[0046] Optionally, the action used to trigger the power-on of the signal processing component in the injection dose acquisition device may be the same as or different from the action to trigger the injection of the drug solution. When the action to trigger the power-on of the signal processing component is different from the action to trigger the injection of the drug solution, the action to trigger the power-on of the signal processing component is tissue touch, and the action to trigger the injection of the drug solution is applying pressure.

[0047] To solve the above-mentioned technical problems, based on another aspect of this utility model, this utility model also provides a drug injection system, which includes:

[0048] An injection pen, comprising a pen body and a pen cap disposed at one axial end of the pen body, wherein the pen cap is rotatable about the axis of the pen body and moves synchronously along the axial direction of the pen body to inject the liquid medicine inside the pen body outward.

[0049] In the injection dose acquisition device described above, at least one of the signal generation component and the signal processing component is located on the pen cap.

[0050] Optionally, one of the signal generating component and the signal processing component connected to the pen cap may be detachably connected to the pen cap.

[0051] The above-described injection dosage acquisition device utilizes the relative motion between the pen cap and the pen body to configure the signal generation and signal processing components. This allows the signal generation and signal processing components to synchronously generate relative motion, which is adapted to the relative axial motion and / or relative rotation between the pen body and the pen cap. The signal processing component acquires the signal from the signal generation component and obtains the relative motion information between the signal generation and signal processing components based on the signal's characteristic parameters. These characteristic parameters include signal intensity, signal quantity, and signal field distribution changes. The relative motion information includes the relative movement distance and / or relative rotation angle between the signal generation and signal processing components. Based on the relative motion information of the electrical signal, the injection dosage of the drug solution is obtained, facilitating subsequent data recording and analysis. Furthermore, compared to the existing technology that records injection dosage by using sound signals generated when the pen cap rotates, this invention records the injection dosage entirely in the form of electrical signals, ensuring more accurate data recording, ensuring no other noise during the injection process, improving the patient experience, and ensuring the electronic and intelligent recording function of the drug injection dosage.

[0052] It should be noted that the drug injection system includes the injection dose acquisition device and also has the technical effects brought by the injection dose acquisition device, which will not be elaborated here. Attached Figure Description

[0053] Those skilled in the art will understand that the accompanying drawings are provided to better understand the present invention and do not constitute any limitation on the scope of the present invention. Wherein:

[0054] Figure 1 This is a schematic diagram of an injection pen in the prior art;

[0055] Figure 2 This is an exploded view of the injection dose acquisition device according to Embodiment 1 of this utility model;

[0056] Figure 3 This is an assembly drawing of the injection dose acquisition device according to Embodiment 1 of this utility model;

[0057] Figure 4 This is a schematic diagram of the connector of Embodiment 1 of this utility model;

[0058] Figure 5 This is another schematic diagram of the connector of Embodiment 1 of this utility model;

[0059] Figure 6 This is a schematic diagram of the first detected element in Embodiment 1 of this utility model;

[0060] Figure 7 This is a schematic diagram of the support base according to Embodiment 1 of this utility model;

[0061] Figure 8 This is a schematic diagram of the injection dosage acquisition device of Embodiment 2 of this utility model assembled on the injection pen;

[0062] Figure 9 This is another schematic diagram of the injection dosage acquisition device of Embodiment 2 of this utility model assembled on the injection pen;

[0063] Figure 10 This is a schematic diagram of the second detected element in Embodiment 2 of this utility model;

[0064] Figure 11 This is a schematic diagram of the fourth mounting component in Embodiment 2 of this utility model;

[0065] Figure 12 This is a flowchart of the drug injection system according to an embodiment of the present invention.

[0066] In the attached image:

[0067] 100 - Injection pen; 110 - Pen body; 111 - Viewing window; 120 - Pen cap; 121 - Button; 122 - Rotating body;

[0068] 200 - Signal generating component; 210 - First detected element; 220 - First mounting part; 221 - Connector; 2211 - First through hole; 2212 - Extension; 2213 - Receiving groove; 222 - Housing; 223 - Abutting part; 230 - Second detected element; 240 - Third mounting part;

[0069] 300 - Signal processing component; 310 - First sensing unit; 320 - First processing unit; 321 - Main board; 3211 - First circuit board; 3212 - Battery; 322 - Switch; 330 - Second mounting component; 331 - Pressing shell; 332 - Support base; 3321 - Second through hole; 3322 - First limiting part; 3323 - Second limiting part; 3324 - Guide part; 340 - Fourth mounting component; 341 - Snap-fit ​​part; 342 - Positioning part; 350 - Indicator light; 360 - Touch element. Detailed Implementation

[0070] To make the objectives, advantages, and features of this utility model clearer, the present utility model will be further described in detail below with reference to 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, and are only used to facilitate and clarify the explanation of the objectives of the embodiments of this utility model. Furthermore, the structures shown in the drawings are often part of the actual structure. In particular, different drawings may emphasize different aspects and sometimes use different scales.

[0071] As used in this invention, the singular forms “a,” “an,” and “the” include plural objects; the term “or” is generally used to include the meaning of “and / or”; the term “a number” is generally used to include the meaning of “at least one”; and the term “at least two” is generally used to include the meaning of “two or more”. Furthermore, the terms “first,” “second,” and “third” are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with “first,” “second,” or “third” may explicitly or implicitly include one or at least two of that feature. “One end” and “the other end,” as well as “proximal end” and “far end,” generally refer to two corresponding parts, including not only endpoints. The terms “installed,” “connected,” and “joined” should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two elements or the interaction between two elements. Furthermore, as used in this invention, the phrase "one element is disposed on another element" generally only indicates that there is a connection, coupling, cooperation, or transmission relationship between the two elements. This connection, coupling, cooperation, or transmission can be direct or indirect through an intermediate element, and should not be construed as indicating or implying a spatial positional relationship between the two elements. That is, one element can be located arbitrarily inside, outside, above, below, or to one side of the other element, unless otherwise explicitly stated. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0072] Figure 1 This is a schematic diagram of an injection pen in the prior art. (See attached image.) Figure 1 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 medication (such as insulin). The pen cap 120 includes a rotating body 122 and a button 121. The rotating body 122 can rotate around the axis of the pen body 110 (clockwise and counterclockwise). The rotating body 122 is used to adjust the injection dosage of the medication in the injection pen 100 by rotating it at different angles. After adjusting the injection dosage, pressing the button 121 will eject the medication from the pen body 110, completing the injection operation. The injection pen 100 can adjust the amount of medication to be injected by the rotating body 122, and the button 121 ensures that the medication can be continuously injected according to the patient's needs, thus facilitating user operation.

[0073] Preferably, the pen body 110 is provided with a viewing window 111, which is used to observe the scale used to characterize the injection dosage. Specifically, when the rotating body 122 rotates relative to the pen body 110 to adjust the injection dosage of the medicine, the user can observe the scale changes through the viewing window 111 to understand whether the amount injected is appropriate, thereby facilitating user operation. Figure 1 As shown, after adjusting the injection dosage, the scale position on the rotating body 122 can be observed through the viewing window 111 to determine the injection dosage. Pressing the button 121 dispenses the corresponding dosage of insulin from the pen body 110. Specifically, when the button 121 is pressed, the rotating body 122 rotates relative to the pen body 110 to reset, and the reading observed in the viewing window 111 returns to zero, indicating the injection is complete. The reset rotation refers to the rotation of the rotating body 122 during dosage adjustment; during the dispensing of insulin from the pen body 110, the rotating body 122 returns to its initial position to facilitate multiple injection operations.

[0074] It should be further explained that when the pen cap 120 rotates around the axis of the pen body 110, it will move synchronously along the axis of the pen body 110. That is, the movement of the pen cap 120 relative to the pen body 110 is a spiral upward or downward movement along the axis of the pen body 110. Specifically, when the rotating body 122 rotates relative to the pen body 110, it spirals upward or downward, meaning that when adjusting the injection dosage, the upper end of the rotating body 122 can move away from the pen body 110. Understandably, after completing one injection, the next injection dosage can be adjusted by rotating the rotating body 122. Correspondingly, after adjusting the injection dosage, the injection operation can be performed by pressing the button 121. Thus, the injection pen 100 can accommodate the needs of multiple injections.

[0075] Typically, the process of rotating the body 122 one full rotation (or rotating the body 122 360°) is divided into multiple dose units. The injection dose of the medication can be obtained by detecting how many dose units the body 122 has rotated. For example, if the rotation of the body 122 one full rotation is divided into 24 dose units, then each 15° rotation of the body 122 increases the dose by one unit. For instance, if the body 122 rotates 60°, the injection pen 100 injects 4 dose units of medication. Understandably, after rotating the body 122 to adjust the injection dose, pressing the button 121 to initiate injection reverses the rotation of the body 122, and the rotation angle is equal to the angle used to adjust the injection dose, thereby injecting the corresponding dose of medication into the body. Furthermore, the actual injection dose of the medication can be obtained by pre-setting how much volume of medication each dose unit represents.

[0076] Based on the aforementioned injection pen 100, this utility model provides a drug injection system. The drug injection system includes the aforementioned injection pen 100 and an injection dosage acquisition device. The injection dosage acquisition device is disposed on the injection pen 100 and is used to acquire the injection dosage of the drug solution dispensed by the injection pen 100. Combined with... Figure 2 As shown, specifically, the injection dose acquisition device includes a signal generation component 200 and a signal processing component 300. At least one of the signal generation component 200 and the signal processing component 300 is located at the pen cap 120, including both the signal generation component 200 and the signal processing component 300 being located at the pen cap 120, and one of the signal generation component 200 and the signal processing component 300 being disposed at the pen cap 120, while the other of the signal generation component 200 and the signal processing component 300 is disposed at the pen body 110. In the case where both the signal generating component 200 and the signal processing component 300 are located 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 transmit the pressure to the button 121 of the pen cap 120, thereby injecting the medicine. The one connected to the rotating body 122 will drive the rotating body 122 to rotate, and the current injection dose can be observed in the viewing window 111.

[0077] Furthermore, the signal generating component 200 and the signal processing component 300 can synchronously generate relative movement in the axial direction of the pen body 110 and / or relative rotation around the axis of the pen body 110 in response to the relative movement between the pen cap 120 and the pen body 110. Understandably, the movement between the pen cap 120 and the pen body 110 includes the pen cap 120 spiraling upwards and downwards 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 around the axis of the pen body 110. Based on the different arrangements of the signal generating component 200 and the signal processing component 300 on the injection pen 100, 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 / or relative rotation around the axis of the pen body 110. Therefore, the relative movement information includes the relative distance in the axial direction of the pen body 110 and the relative rotation angle around the axis of the pen body 110. Specifically, if 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 about 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 about the axis of the pen body 110.

[0078] Furthermore, the signal generating component 200 can generate a signal, and the signal processing component 300 can receive the signal generated by the signal generating component 200. 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 generated by the signal generating component 200, specifically obtaining the relative movement distance and / or relative rotation angle between the two. Based on this relative motion information, the injection dose of the drug solution can be obtained, realizing the automatic acquisition of the injection dose of the drug solution in the form of an electrical signal.

[0079] This typically involves obtaining the number of dosage units of the aforementioned drug solution based on relative motion information, thereby determining the injection dose. Alternatively, the corresponding number of dosage units can be used as the injection dose. It should be noted that the characteristic parameters of the signal here include the signal intensity (amplitude), the number of signals (number, frequency), and the field distribution variation of the signal. Thus, the injection dosage acquisition device of this utility model utilizes the relative motion characteristics between the pen cap 120 and the pen body 110 of the injection pen 100 to configure the signal generation component 200 and the signal processing component 300, so that the signal generation component 200 and the signal processing component 300 can also generate relative motion synchronously. Moreover, the relative motion between the signal generation component 200 and the signal processing component 300 is adapted to the relative axial motion and / or relative rotation between the pen body 110 and the pen cap 120. Thus, the signal of the signal generation component 200 is acquired by the signal processing component 300, and the relative motion information between the signal generation component 200 and the signal processing component 300 is obtained based on the characteristic parameters of the signal. Then, the injection dosage of the drug solution is obtained based on the relative motion information of the electrical signal, which facilitates the subsequent data recording and analysis. Furthermore, compared to the existing technology that records the injection dosage by using the sound signal configured when the pen cap 120 rotates, this invention records the injection dosage entirely in the form of electrical signals, ensuring more accurate data recording. In addition, this invention ensures the electronic and intelligent recording function of the drug injection dosage. For example, the recorded information can be remotely sent to the doctor's end, and the doctor can use the recorded information to understand the patient's condition and provide timely treatment plans.

[0080] Preferably, one of the signal generating component 200 and the signal processing component 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 allows for easy separation of the injection dose acquisition device from the injection pen 100 after the injection operation. Furthermore, this detachable connection allows the injection dose acquisition device to be connected to the rotating body 122 of injection pens 100 of different sizes with slight adjustments or no adjustments to the signal generating component 200, thereby expanding the applicability of the injection dose acquisition device at minimal cost.

[0081] The method of obtaining relative motion information between signal generation component 200 and signal processing component 300 based on different characteristic parameters of the signal is described in detail below with reference to Embodiment 1 and Embodiment 2.

[0082] Example 1

[0083] Please refer to this embodiment. Figures 2 to 7 ,in, Figure 2This is an exploded view of the injection dose collection device according to Embodiment 1 of this utility model. Figure 3 This is an assembly drawing of the injection dose acquisition device according to Embodiment 1 of this utility model. Figure 4 This is a schematic diagram of the connector of Embodiment 1 of this utility model. Figure 5 This is another schematic diagram of the connector of Embodiment 1 of this utility model. Figure 6 This is a schematic diagram of the first detected element in Embodiment 1 of this utility model. Figure 7 This is a schematic diagram of the support base according to Embodiment 1 of this utility model.

[0084] See Figure 2 and Figure 3 The core idea 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 from the signal generating component 200, such as the number of signals (the number of receptions, i.e., the counting of signals) or the field distribution change of the signal. Then, based on this relative rotation angle, a corresponding number of drug dosage units are obtained. Specifically, 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. Both the signal generating component 200 and the signal processing component 300 are located at the pen cap 120 and are rotatably 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 dosage and rotating during drug injection. The other is used to transmit pressure to the button 121 of the pen cap 120 for drug injection. The signal processing component 300 is configured to obtain the relative rotation angle between the signal processing component 300 and the signal generating component 200 based on the quantity or field distribution change of the received signals from the signal generating component 200. For example, the signal generating component 200 is connected to the rotating body 122. When a doctor holds the injection pen 100 and presses the signal processing component 300 to transmit pressure to the button 121 for drug injection, 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 along the axis of the pen body 110, and there is a relative rotation between the signal generating component 200 and the signal processing component 300.

[0085] Regarding the specific method by which the signal processing component 300 obtains the relative rotation angle between the signal processing component 300 and the signal generation component 200 based on the number of signals, the signal generation component 200 includes a plurality of first detected elements 210, which are evenly 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 from the first sensing unit 310 and the first detected elements 210 to the axis of the pen body 110 are equal, such that when the signal processing component 300 and the signal generation component 200 generate relative rotation, the first sensing unit 310 can be relative to the first detected elements 210 along the axis of the pen body 110. Furthermore, when the first sensing unit 310 and the first detected element 210 are opposite 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 obtain the relative rotation angle between the first sensing unit 310 and the first detected element 210 based on the number of times the first detection signal is received. In addition, the number of the first detected elements 210 is preferably configured to be equal to the number of the aforementioned dose units. Thus, when the signal generating component 200 and the signal processing component 300 move synchronously relative to each other as the pen cap 120 and the pen body 110 move, the first sensing unit 310 sequentially faces multiple first detected elements 210 along the axial direction of the pen body 110. After each relative movement, the first sensing unit 310 outputs a first detection signal. The first processing unit 320 receives a first detection signal to indicate the relative rotation angle between the signal generating component 200 and the signal processing component 300. Based on the number of consecutively received first detection signals, the total relative rotation angle between the signal generating component 200 and the signal processing component 300 is obtained, which is equivalent to determining how many dose units the rotating body 122 has rotated, thereby obtaining the injection dose of the liquid medicine. For example, it can be set that every 15° of rotation corresponds to the injection of one dose unit of liquid medicine.

[0086] In one embodiment, the first detected element 210 is a single magnet ( Figure 6 As shown, the first sensing unit 310 is a magnetic sensor. Thus, when the magnetic sensor and the individual magnet are axially opposite each other on the pen body 110, the magnetic sensor detects the magnetic signal of the individual magnet and outputs a first detection signal to the first processing unit 320. It should be noted that in practice, the magnetic signals of other individual magnets will also be received by the magnetic sensor. Considering that the distance between the individual magnet and the magnetic sensor is shortest when they are axially opposite each other, and the signal strength received by the magnetic sensor is also the greatest, during each rotation, when the signal strength received by the magnetic sensor reaches its maximum value, it is considered that the magnetic sensor has received the signal of the axially opposite individual magnet, and outputs a first detection signal.

[0087] In another embodiment, the first detected element 210 is a light reflector, and the first sensing unit 310 is a photoelectric sensor. Thus, when the first detected element 210 and the first sensing unit 310 are axially opposite each other on the pen body 110, the light beam from the photoelectric sensor is reflected back, causing the internal circuitry of the photoelectric sensor 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 opposite each other on the pen body 110, the internal circuitry of the photoelectric sensor is not connected, and the first detection signal cannot be output to the first processing unit 320.

[0088] In some other embodiments, the first sensing unit 310 is one or more of a Hall sensor, a mechanical sensor, or a combination thereof.

[0089] It should be noted that the design of the mechanical structure of the signal generation component 200 and the signal processing component 300 must ensure that when the first detected element 210 and the first sensing unit 310 are opposite each other in the axial direction of the pen body 110, there is no structure between them that blocks light or blocks magnetic signals.

[0090] Regarding the specific method by which the signal processing component 300 obtains the relative rotation angle between the signal processing component 300 and the signal generation component 200 based on the change in the field distribution of the signal, the signal generation component 200 includes a first detected element 210, which is a ring magnet. Figure 2 As shown), and is used to be coaxially arranged 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. 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 the corresponding dosage unit of the medicine. As will be understood by those skilled in the art, the ring magnet here has a single north pole and a south pole arranged in opposite directions along its own diameter, and half of the ring magnet is the north pole and the other half is the south pole. During the relative rotation of the ring magnet and the magnetic sensor, the magnetic field distribution of the ring magnet relative to the magnetic sensor will change accordingly, so the magnetic sensor can obtain the relative rotation angle between the magnetic sensor and the ring magnet by detecting the change in the magnetic field distribution. It should be noted that the magnetic sensor here can be a giant magnetoresistive (GMR) sensor or a tunnel magnetoresistive (TMR) sensor, which can sense the angle of rotation of a ring magnet.

[0091] For details regarding the mounting method of the first detected element 210, the first sensing unit 310, and the first processing unit 320, please refer to [link / reference needed]. Figure 2 and Figure 3 The signal generating component 200 further includes a first mounting member 220, on which a first detected element 210 is fixedly mounted. The signal processing component 300 further includes a second mounting member 330, on which both a first sensing unit 310 and a first processing unit 320 are fixedly mounted, specifically on a support 332 of the second mounting member 330. The first mounting member 220 and the second mounting member 330 are arranged axially along the pen body 110. The first mounting member 220 and the second mounting member 330 are rotatably connected to each other, thereby realizing the rotatable 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 to the rotating body 122 of the pen cap 120 and can drive the pen cap 120 to rotate. The other is used to transmit pressure to the button 121 of the pen cap 120 when pressed to inject medicine.

[0092] 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 fixing member. When the physician presses the fixing member, the pressure is transmitted to the button 121, thereby performing the injection operation. The method of pushing the corresponding injection dose of liquid from the pen body 110 by pressing the button 121 can be either by transmitting pressure through the fixing member always abutting against the button 121, or by transmitting pressure through the fixing member moving a certain distance along the axial direction of the pen body 110 after being pressed before abutting against the button 121. The former method has a higher responsiveness to pressure transmission, while the latter method can better prevent accidental activation of the injection. The two methods can be selected and configured by those skilled in the art.

[0093] Furthermore, the rotating component includes a connecting seat 221 and a housing 222 connected to the connecting seat 221. The connecting seat 221 is rotatably connected to the fixing component, and the housing 222 is used to fit around the outer periphery of the pen cap 120. The corresponding first detected element 210 or first sensing unit 310 is disposed on the connecting seat 221. The connecting seat 221 can be detachably fitted with housings 222 of different sizes, and each injection pen 100 corresponds to a housing 222 of a certain size. In this embodiment, the housing 222 allows the injection dosage acquisition device to be applied to different styles and brands of injection pens 100 with a simple mechanical structure.

[0094] In one exemplary embodiment, see [reference] Figure 2 , Figure 4 and Figure 5The first mounting member 220 is a rotating member, and the second mounting member 330 is a fixing member. The first mounting member 220 includes the aforementioned connecting seat 221 and a sleeve 222 connected to the connecting seat 221. For the mounting method where the first detected element 210 is a ring magnet, the connecting seat 221 has a through hole 2211, which is coaxial with the pen body 110; the inner wall of the first through hole 2211 extends radially inward to form an extension 2212. Figure 4 As shown), the extension 2212 extends circumferentially along the first through hole 2211 in a ring shape. The first detected element 210, which is a ring magnet, is disposed on the extension 2212, and an extension 2212 is provided at each of the axial ends of the first through hole 2211, thereby respectively mounting a ring magnet. For the mounting method where 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). Figure 5 As shown), there are multiple receiving slots 2213, which are arranged evenly and sequentially along the circumference of the first through hole 2211, and multiple first detection elements 210 are sequentially arranged in each receiving slot 2213.

[0095] Further, see Figure 2 The fixing component includes a pressing shell 331 and a support base 332. The pressing shell 331 is sleeved on the support base 332. The corresponding first detected element 210 or first sensing unit 310 is disposed on the support base 332. The support base 332 is rotatably connected to the rotating component. The pressing shell 331 is an elastic shell (such as a silicone shell). When axially pressed, it generates elastic deformation, thereby transmitting pressure to the button 121 of the pen cap 120 for injecting the medicine. Preferably, the connection gap between the support base 332 and the pressing shell 331 is sealed by adhesive bonding, so that the fixing component has a good sealed environment, thereby extending the service life of the internal structure.

[0096] In one exemplary embodiment, combined with Figure 7The first mounting member 220 is a rotating member, and the second mounting member 330 is a fixing member. The second mounting member 330 includes the aforementioned support base 332 and pressing shell 331. Regarding the mounting method of the first sensing unit 310, the support base 332 has a through-hole 3321. The second through-hole 3321 is coaxial with the pen body 110. The inner wall of the second through-hole 3321 forms multiple first limiting portions 3322 and multiple second limiting portions 3323. The multiple first limiting portions 3322 are arranged circumferentially along the second through-hole 3321, and the multiple second limiting portions 3323 are arranged circumferentially along the second through-hole 3321. The first limiting portions 3322 and the second limiting portions 3323 are spaced apart axially in the through-hole, and the first limiting portions 3322 are closer to the first mounting member 220. The first processing unit 320 includes a main board portion 321 and a switch portion 322. Figure 1 As shown, the first sensing unit 310 is integrated on the main board 321. The main board 321 is disposed on the first limiting part 3322, such that the first limiting part 3322 supports the main board 321 axially. The switch part 322 is disposed on the second limiting part 3323, such that the second limiting part 3323 supports the switch part 322 axially. When the pressing shell 331 is pressed, it triggers the switch part 322, causing the switch part 322 to activate the main board 321, thereby allowing the first sensing unit 310 to detect the signal of the first detected element 210. The first limiting part 3322 and the second limiting part 3323 have a gap in the axial direction of the second through hole 3321, which prevents the switch part 322 from contacting the main board 321 when it is activated by the pressing shell 331, thereby preventing pressure from being transmitted to the main board 321 and affecting the performance and lifespan of the components on the main board 321.

[0097] Specifically, see Figure 7 The inner wall of the second through hole 3321 of the support base 332 has a guide portion 3324 that protrudes radially inward and extends axially. Multiple guide portions 3324 are arranged circumferentially along the second through hole 3321. A first limiting portion 3322 and a second limiting portion 3323 are located at opposite ends of the guide portion 3324. The second limiting portion 3323 positions the switch portion 322 through a groove-like structure formed by the end of the guide portion 3324 and the inner wall of the through hole. During installation, the main board portion 321 is first assembled into the second through hole 3321 along the guide portion 3324, and positioned by the first limiting portion 3322. The first limiting portion 3322 can be, for example, a retaining clip used to hold the main board portion 321 in place. Then, the switch portion 322 is assembled onto the top of the guide portion 3324, and thus positioned by the second limiting portion 3323.

[0098] Further, see Figure 2The mainboard unit 321 includes a first circuit board 3211 and a battery 3212 disposed on the first circuit board 3211. A first sensing unit 310 is integrated on the first circuit board 3211. When the pressing shell 331 is pressed, it triggers the switch unit 322, which connects the circuit between the battery 3212 and the first circuit board 3211, ensuring that the battery 3212 can supply power to the first sensing unit 310, enabling the first sensing unit 310 to start working and detect the signal of the first detected element 210. In one embodiment, the switch unit 322 includes a second circuit board and a dome switch disposed on the second circuit board. When the pressing shell 331 is pressed, it transmits pressure to the dome switch, causing the dome switch to be pressed and connecting the corresponding circuit to form a loop, thereby connecting the circuit loop between the battery 3212 and the first circuit board 3211, ensuring that the battery 3212 supplies power to the first sensing unit 310.

[0099] For the aforementioned connecting seat 221 and support seat 332, the injection dose acquisition device of this embodiment also includes an abutment part 223. The abutment part 223 connects the connecting seat 221 and support seat 332 together by a mechanical connection (such as a threaded connection), thereby realizing the connection between the first mounting member 220 and the second mounting member 330.

[0100]

Example 2

[0101] Please refer to this embodiment. Figures 8 to 10 ,in, Figure 8 This is a schematic diagram of the injection dosage acquisition device of Embodiment 2 of this utility model assembled on an injection pen. Figure 9 This is another schematic diagram of the injection dosage acquisition device of Embodiment 2 of this utility model assembled on an injection pen. Figure 10 This is a schematic diagram of the second detected element in Embodiment 2 of this utility model. Figure 11 This is a schematic diagram of the fourth mounting component in Embodiment 2 of this utility model.

[0102] The core idea of ​​this embodiment is that the signal processing component 300 obtains the relative movement distance between the signal generating component 200 and the signal processing component 300 along the pen body 110 based on the intensity or number (times) of the signal from the signal generating component 200, and then obtains the injection dose of the drug solution based on this relative movement distance. Specifically, see [link to relevant documentation]. Figure 8The relative movement between the signal generating component 200 and the signal processing component 300 includes relative movement along the axial direction of the pen body 110. One of the signal generating component 200 and the signal processing component 300 is disposed on the pen cap 120 to transmit pressure to the button 121 of the pen cap 120 and to drive the rotating body 122 of the pen cap 120 to rotate, thereby causing the pen cap 120 to rotate around the axis of the pen body 110 and move synchronously along the axial direction of the pen body 110, thus performing liquid injection. The other of the signal generating component 200 and the signal processing component 300 is disposed on the pen body 110 and fixed relative to the pen body 110. The signal processing component 300 is configured to obtain 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, a signal generating component 200 is disposed on the pen cap 120 to transmit pressure to the button 121 of the pen cap 120, and follows the axial and rotational movements of the pen cap 120 and the pen body 110. A signal processing component 300 is disposed on the pen body 110, and moves relative to the signal generating component 200 on the pen cap 120 along with the pen body 110. After obtaining 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 one dose unit of the drug solution, thereby obtaining the corresponding number of dose units of the drug solution, and thus the actual injection dose of the drug solution.

[0103] Regarding the specific method by 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 signal intensity: The signal generating component 200 includes a second detected element 230 that generates a magnetic field signal (the second detected element 230 is, for example, a ferrite bead). The signal processing component 300 includes a second sensing unit and a second processing unit communicatively connected to each other. The second sensing unit is used to detect the magnetic field signal of the second detected element 230, and the second processing unit is used to obtain the relative movement distance between the second sensing unit and the second detected element 230 based on the intensity of the magnetic field signal. Those skilled in the art will understand that the intensity of the magnetic field signal received by the second sensing unit varies with the axial distance, 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 intensity of the magnetic field signal received by the second sensing unit. Specifically, initially, the magnetic field strength at the initial position and the corresponding initial axial relative distance are obtained. The corresponding mid-course 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-course relative axial distance and the initial axial relative distance, and finally the injection dose of the drug solution is obtained.

[0104] In one embodiment, both the second detected element 230 and the second sensing unit are located on the axis of the pen body 110. During the relative movement of the pen cap 120 and the pen body 110, the second sensing unit and the second detected element 230 are always located 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, obtains the relative distance between them in real time, and then obtains the relative movement distance between them.

[0105] In another embodiment, see Figure 10 The number of second detected elements 230 is multiple, and these multiple second detected elements 230 are arranged circumferentially around the axis of the pen body 110. Preferably, the multiple second detected elements 230 are arranged circumferentially at equal intervals around the axis of the pen body 110. The radial distances from the second sensing unit and the second detected element 230 to 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 relative to each other along the axial direction of the pen body 110. Thus, when the second sensing unit and the second detected element 230 are relative to each other along the axial direction of the pen body 110, the second sensing unit detects that the intensity of the current magnetic field signal is at its maximum value, and the axial relative distance between the second sensing unit and the second detected element 230 can be obtained based on this maximum value.

[0106] The magnetic field strength is inversely proportional to the distance. For example, when the axial distance between the second object being detected and the second sensing unit is 3 mm, the magnetic field strength detected by the second sensing unit is 572.8887 GS; when the axial distance between the second object being detected and the second sensing unit is 3.2 mm, the magnetic field strength detected by the second sensing unit is 515.6523 GS; when the axial distance between the second object being detected and the second sensing unit is 3.4 mm, the magnetic field strength detected by the second sensing unit is 468.7976 GS; and when the axial distance between the second object being detected and the second sensing unit is 3.6 mm, the magnetic field strength detected by the second sensing unit is 426.2322 GS. 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 portion of the individual differences of the magnetic beads (the second detected element 230) and the 0.5GS of Earth's magnetic field noise, the distance information based on the detected magnetic field strength can be accurate to a distance error of 0.1mm. Furthermore, 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.

[0107] Regarding the specific method by which the signal processing component 300 obtains the relative distance between the signal processing component 300 and the signal generation component 200 based on the number of signals, please refer to [reference needed]. Figure 10The signal generating component 200 includes a plurality of second detected elements 230, which are evenly spaced around 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 from the second sensing unit and the second detected elements 230 to the axis of the pen body 110 are equal, such 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 relative to each other along the axial direction of the pen body 110. Furthermore, when the second sensing unit and the second detected elements 230 are relative to each other along 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 used to obtain the relative movement distance between the second sensing unit and the second detected elements 230 based on the number of times the second detection signal is received. Preferably, each time a second detection signal is received, the relative movement distance is considered to have increased by a set distance unit. The increasing distance unit can be obtained based on the number of received signals, thereby directly obtaining the relative movement distance between the second sensing unit and the second detected element.

[0108] In one embodiment, the second detected element 230 is a light reflector, and multiple light reflectors are arranged circumferentially and 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 opposite each other on the pen body 110, the light beam from the photoelectric sensor is reflected back, 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 opposite each other on the pen body 110, the internal circuit of the photoelectric sensor is not connected, and the second detection signal cannot be output to the second processing unit.

[0109] It should be noted that the design of the mechanical receiving of the signal generating component 200 and the signal processing component 300 must ensure that there is no structure between the second detected element 230 and the second sensing unit that blocks light or magnetic signals when they are axially opposite each other on the pen body 110.

[0110] For details regarding the installation method of the second detected element 230, the first sensing unit 310, and the second processing unit, please refer to [link / reference needed]. Figure 9The signal generating component 200 further includes a shell-shaped third mounting member 240, in which the second detected element 230 is disposed. The signal processing component 300 further includes a shell-shaped fourth mounting member 340, in which both the second sensing unit and the second processing unit are disposed. One of the third mounting member 240 and the fourth mounting member 340 is disposed on the pen cap 120 and, when pressed, transmits pressure to the button 121 of the pen cap 120, and rotates 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 disposed on the pen body 110. For example, one of the third mounting member 240 and the fourth mounting member 340 is sleeved (fitted) on the outer periphery of the pen cap 120 to achieve a detachable connection with the pen cap 120, while the other of the third mounting member 240 and the fourth mounting member 340 is snapped onto the pen body 110.

[0111] In one exemplary embodiment, the third mounting member 240 is sleeved on the pen cap 120. When the third mounting member 240 is pressed, it transmits pressure to the button 121 of the pen cap 120, thereby injecting the medicine. The manner in which the second detected element 230 is disposed in the third mounting member 240 can be referred to the manner in Embodiment 1 where the first detected element 210 is disposed on the connector 221 and housed in the housing 222 along with the connector 221, which will not be described in detail here.

[0112] In one exemplary embodiment, the fourth mounting element 340 snaps onto the pen body 110. Specifically, see [link to documentation]. Figure 11 The fourth mounting member 340 has a positioning part 342 and a snap-fit ​​part 341. When the fourth mounting member 340 is installed on the pen body 110, the positioning part 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), and the snap-fit ​​parts 341 on both sides snap the fourth mounting member 340 onto the outer peripheral wall of the pen body 110. The second processing unit is disposed in the fourth mounting member 340. The structure of the second processing unit can be roughly referred to in the description of the main board part 321 in Embodiment 1, and will not be described in detail here.

[0113] Based on the above descriptions of the injection dose acquisition device in Embodiments 1 and 2, the injection dose acquisition device of this utility model further includes at least one of the following preferred embodiments.

[0114] (1) The injection dose acquisition device also includes a control module connected to the signal processing component 300. The control module controls the switching of the internal circuitry of the signal processing component 300, enabling the signal processing component 300 to receive or reject signals from the signal generating component 200. Specifically, when the signal processing component 300 needs to receive signals from the signal generating component 200, the control module connects the circuitry of the signal processing component 300. When the signal processing component 300 does not need to receive signals from the signal generating component 200, the control module shuts off the circuitry of the signal processing component 300 to save power for the injection dose acquisition device. For example, the control module includes the dome switch and the second circuit board as described in Embodiment 1. In other embodiments, the control module can also be a switching element disposed on the signal generating component 200, which directly controls whether the battery 3212 supplies power to the first sensing unit 310 (the 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 pressure, it connects the internal circuitry of the signal processing component 300 to receive signals from the signal generating component 200. The biosensor not only meets the needs of connecting and disconnecting the circuit of the control signal processing component 300, but also detects false triggers when not operated by the user through biometric identification. During the process of the user injecting the drug, 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 living organism, the biosensor will not trigger the connection of the circuit of the signal processing component 300, thereby achieving the effect of preventing false triggers.

[0115] 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 connection 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 connection of the signal processing component 300 to ensure that the signal processing component 300 is powered on. This allows the signal processing component 300 to initiate the acquisition and processing of signals from the signal generation component 200, and subsequently output injection dosage information. It should be noted that the touch element 360 is touched before the injection of the medication, that is, before the relative movement between the pen cap 120 and the pen body 110 occurs, the touch element 360 powers on the signal processing component 300. More specifically, the touch element 360 ensures that the signal processing component 300 is powered on before the pen cap 120 is pressed. This implementation does not limit the type of touch element, which can be a capacitive touch element, a resistive touch element, an infrared sensing touch element, or an optical touch element.

[0116] It should be noted that in this embodiment, when the touch element 360 detects a touch action, it powers on the signal processing component 300 and puts it into standby mode. The standby mode lasts for a set time, after which it automatically powers off. That is, the user does not need to continuously apply touch actions to keep the signal processing component 300 powered on; a single touch action is sufficient to power on the system immediately, and the power-on time lasts for the set standby time before the system automatically powers off. Regarding the standby time setting, it is understood that the standby time needs to be greater than the injection time of the medication so that the signal processing component 300 can be continuously powered and able to record complete medication injection information.

[0117] In one embodiment, as understood in conjunction with Embodiment 1, see [link to embodiment 1]. Figure 1 and Figure 2 Both the signal generating component 200 and the signal processing component 300 are located at the pen cap 120, and are rotatably 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 dosage and rotating during drug injection. The other is used to transmit pressure to the button 121 of the pen cap 120 for drug injection. 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 user touch. Thus, when a user touches the top of the press cover 331, the touch element 360 will detect the touch action. The touch element 360 will then immediately respond and connect the internal circuitry of the signal processing component 300 to prepare for receiving and processing signals; that is, the signal processing component 300 enters a standby state. After the signal processing component 300 enters the standby state, it can then apply force to press the press cover 331, thereby transmitting pressure to the button 121 at the pen cap 120 to inject the medicine.

[0118] Specifically, in combination Figure 2 and Figure 3Taking the switch unit 322 as an example of the touch element 360, the touch element 360 is mounted on the support base 332 and located in the pressing shell 331, with the touch element 360 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 responds immediately. The touch element 360 will connect the circuit on the main board unit 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 indicator light 350) configured in this embodiment can remind the user that the system has been successfully powered on. That is, this embodiment uses a touch method to trigger the power-on of the signal processing component 300, instead of the traditional dome switch pressing method for power-on.

[0119] In another embodiment, and in conjunction with Embodiment 2, see [reference needed]. Figure 8 and Figure 9 One of the signal generating component 300 and the signal processing component 200 is disposed on the pen body 110, and the other is disposed on the pen cap 120, and can drive 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 the end of the one of the signal generating component 200 and the signal processing component 300 disposed on the pen cap 120 away from the pen body 110 along the axial direction. That is, the touch element 360 is located inside the top 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 through the touch element 360, and then pressure is transmitted to drive the injection pen 100 to inject the medicine. Specifically, when the signal generating component 200 is disposed on the pen cap 120, the touch element 360 is disposed on the inner side of the top of the shell-shaped third mounting member 240 of the signal generating component 200. Figure 8As shown, first touch the top of the third mounting component 240 to trigger the touch element 360 to ensure the system is powered on, and then press the third mounting component 240 to perform the injection of the medicine; when the signal processing component 360 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 component 340 of the signal processing component 300. First touch the top of the fourth mounting component 340 to trigger the touch element 360 to ensure the system is powered on, and then press the fourth mounting component 340 to perform the injection of the medicine. Thus, when a user touches 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 touch element 360 on the inner side of the top of 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 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 correspondingly located at the pen cap 120 to perform the injection of medicine.

[0120] Of course, the touch element 360 can also be disposed inside one of the signal generating component 200 and the signal processing component 300 disposed on the pen body 110, and located at the end of the signal generating component 200 and the signal processing component 300 disposed on the pen body 110 radially away from the pen body 110, that is, the touch element 360 is located on the lateral top side inside one of the signal generating component 200 and the signal processing component 300 disposed on the pen body 110. Specifically, when the signal generating component 200 is disposed on the pen body 110, the touch element 360 is disposed on the lateral top side inside the shell-shaped third mounting member 240 of the signal generating component 200; when the signal processing component 360 is disposed on the pen body 110, the touch element 360 is disposed on the lateral top side inside the shell-shaped fourth mounting member 340 of the signal processing component 300. Figure 9 (As shown). Thus, when a user touches the side top of the third mounting member 240 or the fourth mounting member 340, the touch element 360 inside the side top of 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 321, thereby ensuring that the battery 3212 powers the sensor inside the signal processing component 300.

[0121] Figure 12This is a flowchart of the operation of a drug injection system according to an embodiment of this utility model. After the touch element 360 detects a trigger signal from a finger, it immediately connects the internal circuitry of the system to ensure rapid power-on (the power-on status can be observed via indicator light 350). The sensor also powers on synchronously and enters standby mode after initialization. When the user presses the touch element 360, i.e., applies pressure to the pressing shell 331 until it exceeds the infusion force set by the injection pen itself, the pen cap 120 spirals down to inject insulin. Simultaneously, the sensor detects the rotation information of the magnet, the strength information of the magnetic field signal, etc. After the insulin injection is completed, the user no longer applies pressure, and the sensor sends the recorded information to the processor to finally determine the injection dose of the insulin pen. The system will power off after the drug injection is completed. Furthermore, the system of this embodiment also has a data retention function. Specifically, after the insulin injection is completed and the system is powered off, the system can activate the data retention function as needed, setting the system's retention time to ensure that the system's local storage module uploads the information recorded by the sensor to the cloud server within this retention time.

[0122] Considering that current insulin pen systems primarily use a press-type component to activate the internal circuitry of the signal processing unit 300, such as the triggering method described in Embodiment 1, where the user applies force to press the press shell 331, causing it to deform and contact the dome switch (here, the switch unit 322 is considered the dome switch). Continuing to apply force to the dome switch activates the circuitry on the main board, allowing the battery 3212 to power the sensor. In other words, operating the pen 100 can be considered as applying a two-stage pressing force. The first stage of pressing is used to press the dome switch to ensure the internal circuitry is connected, and the second stage of pressing is used to perform the insulin injection operation (i.e., the spiral descent of the pen cap 120) after the internal circuitry is activated. If the pressure required in the first stage is too high, it can cause a delay in system power-on, affecting the signal processing component 300's detection and processing of the signal generation component 200. This, in turn, affects the accuracy of the converted injection dosage information. Specifically, if the pressure in the first stage is too high, exceeding the infusion force of the pen itself, the pen may have already started injecting insulin before the system is powered on, but the sensor has not yet powered on. This delay in sensor power-on affects the accuracy of the sensor's detection of the magnet's rotation angle. The sensor's output rotation angle information may be incomplete, resulting in missing information and a smaller detected rotation angle, thus leading to an inaccurate converted injection dosage. Conversely, if the pressure required in the first stage is too low, it can cause the internal circuitry of the system to be mistakenly connected, leading to false triggering of the system and affecting the accuracy of the injection dosage information.

[0123] Compared to existing insulin pen systems that use a press-type element to trigger system power-on, this embodiment uses a touch element 360 to power the system before insulin injection. The system is powered on immediately simply by detecting a user touch on the touch element 360. The touch element 360 has a fast response time and high sensitivity, eliminating the need for pressure to power on the system. This ensures rapid system power-on and avoids the inaccuracies in dosage information caused by excessive pressure required to trigger system power-on in conventional technologies, which can lead to power-on delays and lost data. Furthermore, it avoids situations where excessive pressure exceeds the pen's infusion force, causing the pen to start injecting insulin but the system is actually powered on before the sensor detects the power-on delay, resulting in missing sensor data and affecting data accuracy. Moreover, the touch element 360 in this embodiment also avoids the problem of insufficient triggering force required for ordinary microswitches, which could lead to false power-on and data recording.

[0124] Therefore, the method of using a touch element to conduct the circuit in this embodiment replaces the traditional method that requires external force or movement of physical parts (such as electrical contact designs) to trigger the system to power on. In other words, existing technologies require external force to make physical components contact the contacts on the circuit to connect it. This eliminates the requirement for a specific pressure force, solves the compatibility problem caused by the large differences in injection force between different insulin pens, and stabilizes the working stability of the injection dose acquisition device in this embodiment when used with different injection pens. Compared to existing technologies where both power-on and insulin injection require user pressure, the touch-detection power-on method of the injection dose acquisition device in this embodiment does not affect the operation of the injection pen by pressing to inject insulin, ensuring that the injection dose acquisition device of this embodiment is compatible with different injection pens.

[0125] In summary, in this embodiment, the location for energizing the signal processing component 300 in the injection dosage acquisition device can be the same as or different from the location for triggering the injection of the drug solution. For example, both the location for energizing the signal processing component 300 and the location for triggering the injection of the drug solution are located at the axial top of the pressing shell 331 on the pen cap 120. Specifically, the signal processing component 300 is energized by pressing the pressing shell 331 at the pen cap 120 using a conventional pressing-type energization method, or by touching the pressing shell at the pen cap 120 using the aforementioned touch-type energization method, and further, pressure is applied to the pressing shell 331 to inject the drug solution. For another example, see [reference needed]. Figure 8 and Figure 9The power-on position of the trigger signal processing component 300 is located at the side top of the fourth mounting member 340 on the pen body. The signal processing component 300 can be powered on by a conventional press-type power-on method or the touch-type power-on method mentioned above. The position that triggers the injection of the medicine is located at the axial top of the third mounting member 240 on the pen cap 120. The medicine is injected by a press-type injection method.

[0126] Furthermore, the power-on action of the trigger signal processing component 300 in the injection dosage acquisition device may be the same as or different from the action of triggering the injection of the drug solution. For example, both may be powered on and injected with insulin by conducting pressure, i.e., a press-type power-on method and a press-type injection method. Further, when the power-on action of the trigger signal processing component 300 differs from the action of triggering the injection of the drug solution, the power-on action of the trigger signal processing component 300 is tissue touch, i.e., the aforementioned touch-type power-on method, and the action of triggering the injection of the drug solution is applying pressure, i.e., applying pressure to the button 121 of the pen cap 120 to cause the pen cap 120 to spiral down and thus inject the drug. Understandably, when the trigger signal processing component 300 is powered on at the pressing shell 331 of the pen cap 120 and powered on as tissue touch, the touch force during the touch-type power-on process is much 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, at which point the pen cap 120 spirals down to administer the medication.

[0127] (2) The injection dosage acquisition 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 solution, or detects the on-time of the internal circuit of the signal processing component 300 to obtain the injection time of the current injection solution. If the recorded injection time exceeds the 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.

[0128] (3) The injection dose acquisition device also includes a storage module, in which information on the injection dose and injection time of the drug solution can be stored.

[0129] (4) The injection dose acquisition device also includes a communication module, comprising a wired communication unit and a wireless communication unit. The wireless communication unit includes, but is not limited to, Bluetooth, ZigBee, and Wi-Fi. The wired communication unit includes, but is not limited to, serial communication and USB interface communication. The communication module is used to transmit the injection dose data and injection time information of the drug solution to an external device. Specifically, after the drug infusion dose and time information are acquired by the signal processing component 300, they can be stored in the storage module; or the data can be sent to a server or client through the communication module, which facilitates the management and analysis of daily injection records.

[0130] (5) The injection dosage acquisition device also includes a reminder module to remind the user to administer the injection. For example, doctors can set information such as the dosage and interval for each injection via their mobile phones. When the required injection time is recorded, the reminder module sends this information to the patient's or their family member's mobile phone via the communication module to notify the patient or their family member to administer the medication in a timely manner to avoid affecting the patient's health.

[0131] (6) The injection dosage acquisition device also includes a temperature alarm module. When the drug solution in the injection pen 100 and the injection pen 100 are exposed to a temperature higher than the 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.

[0132] (7) The injection dosage acquisition device also includes a status indicator module, which is used to characterize the working status of the injection pen 100, such as indicating that a drug injection is currently in progress, that the injection dosage acquisition device is powered on, or that the injection is complete. In one embodiment, the status indicator module includes an indicator light 350. Figure 2 and Figure 3 As shown, the indicator light 350 can be integrally injection molded with the pressing shell 331. The color change and flashing frequency of the indicator light 350 indicate the corresponding working status changes of the injection pen 100 or the injection dosage acquisition device.

[0133] (8) The injection dose acquisition device also includes a self-learning module. The self-learning module is configured such that after the signal processing component 300 processes a certain amount of data such as injection dose and injection time, the self-learning module automatically turns on and learns and records the corresponding information. When the signal processing component 300 cannot acquire the injection dose information of the drug solution that should be injected this time, the self-learning module starts to alarm to prompt the injection. At the same time, it displays the dose guide for this time based on the injection dose status of the same period in history and the current day.

[0134] Although the present invention has been disclosed above with reference to preferred embodiments, these embodiments are not intended to limit the present invention. For any person skilled in the art, many possible variations and modifications can be made to the technical solutions of the present invention based on the disclosed technical content, or equivalent embodiments can be modified accordingly, without departing from the scope of the present invention. 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 present invention, shall still fall within the protection scope of the present invention.

Claims

1. An injection dosage acquisition device for mounting on an injection pen, the injection pen comprising a pen body and a pen cap disposed 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 liquid medicine contained within the pen body outward, characterized in that, The injection dose acquisition device includes a signal generation component and a signal processing component; The signal generating component and the signal processing component are used to synchronously generate relative movement in the axial direction of the pen body and / or relative rotation around the axis of the pen body as the relative movement between the pen cap and the pen body occurs. The signal processing component is used to acquire the signal generated by the signal generating component. The signal generating component includes a plurality of first detected elements, which 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 that are communicatively connected to each other. The first sensing unit and the first detected elements are each equidistant from the axis of the pen body. When the first sensing unit and the first detected elements are opposite each other along the axis of the pen body, the first processing unit receives a first detection signal output by the first sensing unit. Alternatively, the signal generating component includes a single first detected element, which is a ring magnet. The first detected element is coaxially arranged with the axis of the pen body, and the first sensing unit is arranged on the axis of the pen body to detect the magnetic field distribution of the first detected element. Alternatively, the signal generating component includes a second detected element for generating a magnetic field signal, and the signal processing component includes a second sensing unit and a second processing unit communicatively connected to each other, wherein the second sensing unit is used to detect the magnetic field signal of the second detected element; or, the signal generating component includes a plurality of second detected elements, which are evenly arranged circumferentially around the axis of the pen body, and the second sensing unit and the second detected element are each equidistant from the axis of the pen body. When the second sensing unit and the second detected element are opposite each other along the axial direction of the pen body, the second sensing unit outputs a second detection signal to the second processing unit.

2. The injection dose acquisition device according to claim 1, characterized in that, When the signal processing component includes multiple first detected elements, the first detected element is a single magnet, and the first sensing unit is a magnetic sensor. Alternatively, the first detected element may be a light reflector, and the first sensing unit may be a photoelectric sensor. Alternatively, the first sensing unit may be one or more of a Hall sensor or a mechanical sensor.

3. The injection dose acquisition device according to claim 1, characterized in that, When the signal generating component includes one or more of the first detected element, the signal generating component further includes a first mounting member, and the first detected element is disposed on the first mounting member. The signal processing component further includes a second mounting member, and the first sensing unit and the first processing unit are both disposed 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 drive the pen cap to rotate. The other is used to transmit pressure to the button of the pen cap when pressed to inject medicine.

4. The injection dose acquisition device according to claim 3, characterized in that, Of the first mounting component and the second mounting component, one is a rotating component and the other is a fixing component for connecting to the pen body; the rotating component includes a connecting seat and a sleeve connected to the connecting seat, the connecting seat is connected to the fixing component, the sleeve is used to fit around the outer periphery of the pen cap, and the corresponding first detected element or first sensing unit is disposed on the connecting seat.

5. The injection dose acquisition device according to claim 4, characterized in that, The first mounting component is the rotating component, and the connecting seat has a through first hole; The inner wall of the first through hole extends inward along its own radial direction to form an extension, and the extension extends in a ring shape along the circumference of the first through hole. The first detection element of the ring magnet is disposed on the extension. And / or, the inner wall of the first through hole is recessed outward along its own radial direction to form a receiving groove, and there are multiple receiving grooves. The multiple receiving grooves are arranged evenly at intervals along the circumference of the first through hole, and the multiple first detection elements are arranged in each of the receiving grooves.

6. The injection dose acquisition device according to claim 3, characterized in that, Of the first and second mounting components, one is a rotating component and the other is a fixing component for connecting to the pen body; the fixing component includes a pressing shell and a support base, the pressing shell is sleeved on the support base, the corresponding first detected element or the first sensing unit is disposed on the support base, the support base is rotatably connected to the rotating component, and the pressing shell is used to transmit pressure to the button of the pen cap when it is axially pressed.

7. The injection dose acquisition device according to claim 6, characterized in that, The second mounting component is the fixing component; the support base has a through second hole, and the inner wall of the second through hole forms a plurality of first limiting portions and a plurality of second limiting portions. The plurality of first limiting portions are arranged circumferentially along the second through hole, and the plurality of second limiting portions are arranged circumferentially along the second through hole. The first limiting portions and the second limiting portions are spaced apart in the axial direction of the through hole, and the first limiting portions are closer to the first mounting component. The first processing unit includes a main board and a switch. The first sensing unit is integrated on the main board. The main board is disposed on the first limiting part, and the switch is disposed on the second limiting part. When the pressing shell is pressed, the switch will be triggered, so that the switch will activate the main board to detect the signal of the first detected element through the first sensing unit.

8. The injection dose acquisition device according to claim 1, characterized in that, When the signal generating component includes a second detectable element for generating a magnetic field signal, both the second detectable element and the second sensing unit are located on the axis of the pen body; Alternatively, there may be multiple second detected elements, and these multiple second detected elements may be arranged around the axis of the pen body, with the second sensing unit and the second detected elements each having an equal radial distance from the axis of the pen body.

9. The injection dose acquisition device according to claim 1, characterized in that, When the signal generating component includes multiple second detected elements, the second detected elements are light reflectors and the second sensing unit is a photoelectric sensor.

10. The injection dose acquisition device according to claim 1, characterized in that, When the signal generating component includes one or more second detected elements, the signal generating component further includes a shell-shaped third mounting member, in which the second detected element is disposed; the signal processing component 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 disposed on the pen cap and is used to transmit pressure to the pen cap when pressed; the other of the third and fourth mounting members is disposed on the pen body.

11. The injection dose acquisition device according to claim 10, characterized in that, One of the third and fourth mounting components is used to fit around the outer periphery of the pen cap, and the other of the third and fourth mounting components is used to snap onto the pen body.

12. The injection dose acquisition device according to claim 1, characterized in that, The injection dose acquisition device also includes a touch element configured to detect a touch action before the pen cap and the pen body generate relative movement, control the circuit connection of the signal processing component to power on the signal processing component.

13. The injection dose acquisition device according to claim 12, characterized in that, The signal generating component and the signal processing component are rotatably connected. 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. The touch element is disposed in the pressing shell and is located at the 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 disposed on the pen body, and the other is disposed on the pen cap, and is capable of rotating the pen cap; the touch element is disposed inside the one of the signal generating component and the signal processing component disposed on the pen cap, and is located at the end of the one of the signal generating component and the signal processing component disposed on the pen cap that is away from the pen body along the axial direction of the pen body; or, the touch element is disposed inside the one of the signal generating component and the signal processing component disposed on the pen body, and is located at the end of the one of the signal generating component and the signal processing component disposed on the pen body that is away from the pen body along the radial direction of the pen body.

14. The injection dose acquisition device according to claim 12, 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.

15. The injection dose acquisition device according to claim 1, characterized in that, The location in the injection dosage acquisition device used to trigger the power-on of the signal processing component may be the same as or different from the location used to trigger the start of drug injection; and / or... The action used to trigger the power-on of the signal processing component in the injection dosage acquisition device may be the same as or different from the action used to trigger the injection of the drug solution. When the action to trigger the power-on of the signal processing component is different from the action used to trigger the injection of the drug solution, the action to trigger the power-on of the signal processing component is tissue touch, and the action to trigger the injection of the drug solution is applying pressure.

16. A drug 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 is rotatable about the axis of the pen body and moves synchronously along the axial direction of the pen body to inject the liquid medicine inside the pen body outward. The injection dose acquisition device according to any one of claims 1-15, wherein at least one of the signal generation component and the signal processing component is located on the pen cap.

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