An injection device

Abstract

The embodiment of the present disclosure discloses an injection device. The injection device is configured to be loaded with a syringe including a refill and a needle, or a refill and a needle, and the injection device includes: an injection site fixer, which is configured to fix the epidermis and subcutaneous tissue of the injection site; a host, which is connected to the injection site fixer and is configured to automatically perform an injection process on the fixed injection site. The injection device can fix the epidermis and subcutaneous tissue of the injection site so that the needle puncture depth does not enter the muscle tissue as much as possible, thereby facilitating injection and reducing the user's pain; and it can automatically perform the injection process, reducing the difficulty of operation, so that users with insufficient injection experience can also perform the injection process conveniently and efficiently.

Description

Technical Field

[0001] The present disclosure relates to an injection device, and more particularly, to an injection device used in conjunction with a syringe or a pen core and a needle. Background Art

[0002] China has the largest number of diabetes patients in the world, and the number of patients is increasing every year. Currently, there are 110 million diabetes patients in China, while the number was 90 million in 2011. According to the WHO's forecast, if urgent action is not taken to reduce risk factors related to lifestyle, such as unhealthy diet, long-term sitting and lack of physical exercise, the number of diabetes patients in China will increase from the current 110 million to 150 million by 2040. At the same time, China is also the country with the highest number of deaths from diabetes, mainly because the treatment rate and control rate of Chinese diabetes patients are very low. According to the survey data of the Diabetes Branch of the Chinese Medical Association, the blood sugar control rate of diabetes patients in my country who have been treated with insulin is only 37%, and the failure to inject insulin regularly according to doctor's advice and the non-standard injection technique are the main reasons for the low blood sugar control rate of diabetes patients in my country.

[0003] Diabetic patients have relatively insufficient insulin secretion or insulin resistance, so early insulin treatment is very necessary. Insulin injection can temporarily give the weakened pancreatic B cells a rest, just like a sick person needs a rest. After a period of treatment, some diabetics will recover their pancreatic B cell function to a certain extent, and some can even reduce or stop insulin injections. Insulin treatment can both lower blood sugar and avoid the toxicity of oral drugs to the liver and kidneys, reducing or delaying the occurrence of complications.

[0004] With the continuous advancement of technology, the use of insulin pens has become more and more convenient, the needles have become thinner and thinner, the pain of injection has become less and less, and the cost has become lower and lower. Even so, the vast majority of diabetic patients are willing to choose to take hypoglycemic drugs to control blood sugar instead of injecting insulin. There are two main reasons: on the one hand, patients are afraid of needles. Diabetic patients need 1-4 subcutaneous injections a day. The pain and fear of each injection make many diabetic patients discouraged from insulin injections; on the other hand, insulin injection requires high standardization of insulin pen operation. Many middle-aged and elderly diabetic patients have poor eyesight and find it difficult to complete accurate operations. They cannot use insulin injection pens to complete injections independently. In addition, the thickness of subcutaneous tissue in different parts of the human body is different, and the injection method is also different. If the injection method is not standardized, it will not only increase the pain of injection, but also may lead to inaccurate insulin injection dosage, resulting in large fluctuations in blood sugar and early complications.

[0005] In addition to insulin injections, other frequent subcutaneous injections also have the above problems. Summary of the invention

[0006] Therefore, an injection device is needed to solve the above problems existing in the prior art. An injection device is needed, which can be used in conjunction with a syringe including a cartridge and a needle or a cartridge and a needle, and can fix the epidermis and subcutaneous tissue of the injection site so that the needle punctures as little as possible into the muscle tissue, thereby facilitating injection and reducing the user's pain; and it can automatically perform the injection process, reducing the difficulty of operation, so that users with insufficient injection experience can also perform the injection process conveniently and efficiently.

[0007] According to a first embodiment of the present disclosure, an injection device is provided, which is configured to be loaded with a syringe including a cartridge and a needle, or a cartridge and a needle. The injection device comprises: an injection site fixer, which is configured to fix the epidermis and subcutaneous tissue of the injection site; and a host, which is fixed to the injection site fixer and is configured to automatically perform an injection process on the fixed injection site.

[0008] In some embodiments, the injection site fixer includes: at least one of a negative pressure suction mechanism and a mechanical squeezing mechanism; a accommodating portion, which is constructed to: receive and fix the epidermis and subcutaneous tissue of the injection site through the at least one of the negative pressure suction mechanism and the mechanical squeezing mechanism, and is provided with an opening to expose at least a portion of the epidermis and subcutaneous tissue of the injection site received and fixed; a height limiting portion, which is constructed to: limit the height of the at least a portion of the exposed epidermis and subcutaneous tissue of the injection site.

[0009] In some embodiments, when the injection site holder includes at least the negative pressure suction mechanism, the injection device further includes a pressure detector configured to detect the pressure applied by the injection site holder to the injection site.

[0010] In some embodiments, the host further comprises a microcontroller unit configured to receive a signal indicating the pressure magnitude from the pressure detector, and send a pressure maintenance signal to the injection site fixture when the pressure is within a preset range.

[0011] In some embodiments, the injection site fixator is configured such that: the accommodating portion is disc-shaped and has an arched cross-section; and / or the height limiting portion is disposed outside the opening; and / or the height limiting portion includes an inwardly extending portion.

[0012] In some embodiments, when the injection site fixture includes at least the negative pressure suction mechanism, the injection device further includes a needle sealing mechanism configured to seal between the needle and the injection site fixture.

[0013] In some embodiments, the host also includes: a first drive mechanism, which is configured to drive injection in response to an injection drive signal; a second drive mechanism, which is configured to drive the needle to penetrate the injection site in response to an acupuncture drive signal; and a microcontroller unit, which is configured to: receive a signal indicating the pressure magnitude from the pressure detector, and when the pressure is within a preset range, send the acupuncture drive signal to the second drive mechanism and send the injection drive signal to the first drive mechanism in sequence.

[0014] In some embodiments, the syringe is provided with a dose adjustment mechanism or the host is provided with a dose adjustment mechanism, and the host further comprises: a dose adjustment detection mechanism, which is configured to detect the operating state of the dose adjustment mechanism and send a corresponding dose adjustment indication signal; wherein the microcontroller unit is further configured to: receive the dose adjustment indication signal, and allow actuation of the injection site fixer to perform fixation when the dose adjustment indication signal indicates that a dose adjustment has been performed.

[0015] In some embodiments, the first drive mechanism is connected to a dose adjustment mechanism of the syringe or a dose adjustment mechanism on the host, and the operating state of the dose adjustment mechanism includes whether dose adjustment is performed, whether the needle is blocked, and whether the dose adjustment mechanism is pushed back to zero position.

[0016] In some embodiments, the host further comprises: an in-place detection mechanism, which is configured to: detect whether the syringe and the needle are assembled in place when the injection device is configured to be loaded with the syringe and the needle, and detect whether the refill and the needle are assembled in place when the injection device is configured to be loaded with the refill and the needle, and send a corresponding in-place detection signal; wherein the microcontroller unit is configured to: receive the in-place detection signal, and when the in-place detection signal indicates that the assembly is in place, allow the injection site fixer to be actuated to perform fixation.

[0017] In some embodiments, the host further comprises: an in-situ detection mechanism, which is configured to: detect whether the syringe and the needle are assembled in place when the injection device is configured to be loaded with the syringe and the needle, and detect whether the refill and the needle are assembled in place when the injection device is loaded with the refill and the needle, and send a corresponding in-situ detection signal; an injection button, which is configured to send a start signal when pressed; wherein the microcontroller unit is further configured to: after receiving the start signal, actuate the dose adjustment detection mechanism and the in-situ detection mechanism to perform detection; and actuate the injection site fixer to perform fixation when the in-situ detection signal indicates that the assembly is in place and the dose adjustment indication signal indicates that the dose adjustment has been performed.

[0018] In some embodiments, the host also includes: a first drive mechanism, which is configured to drive injection in response to an injection drive signal; a second drive mechanism, which is configured to drive the needle to penetrate the injection site in response to an acupuncture drive signal; an injection button, which is constructed to send a start signal when pressed; and a microcontroller unit, which is configured to: in response to the start signal, send the acupuncture drive signal to the second drive mechanism when the injection site meets the acupuncture start condition.

[0019] In some embodiments, the acupuncture initiation condition includes at least one of the following: when the injection site fixture includes at least the negative pressure suction mechanism, the pressure in the injection site fixture is within a preset range and can be maintained; when the injection site fixture includes a mechanical squeezing mechanism, the mechanical squeezing mechanism completes the injection site fixation.

[0020] In some embodiments, the second drive mechanism is further configured to: drive the needle to reset in response to a reset drive signal; the microcontroller unit is further configured to: when the injection completion condition is met, actuate the injection site fixture to perform release, and then send the reset drive signal to the second drive mechanism.

[0021] In some embodiments, the injection completion condition includes at least one of the following: the dose adjustment mechanism returns to the zero position, and the needle stays in the subcutaneous tissue for a set threshold time; or needle blockage is detected.

[0022] In some embodiments, the injection device, when configured to accommodate a syringe and a needle, further comprises a first cover, a second cover, and a third cover detachably connected to the host.

[0023] Wherein, the first cover is constructed to be used for loading the syringe into the main unit in a disassembled state; the second cover is constructed to be used for loading or removing the needle in a disassembled state; and the third cover is constructed to be detachably connected to a side of the second cover opposite to the first cover, and to expose the accommodating portion of the injection site fixture in a disassembled state.

[0024] In some embodiments, the injection device, when configured to load a refill and a needle, further includes a second cover and a third cover detachably connected to the host, wherein the second cover is constructed to be used for loading or removing the refill and the needle in a disassembled state; and the third cover is constructed to be detachably connected to a side of the second cover opposite to the host, and to expose the accommodating portion of the injection site fixture in a disassembled state.

[0025] In some embodiments, when the injection site holder includes at least the negative pressure suction mechanism, a needle sealing mechanism and the injection site holder are provided in the second cover, and when the second cover is closed, the needle sealing mechanism assembles the needle in an airtight manner to achieve an airtight seal of the needle relative to the injection site holder.

[0026] The injection device according to each embodiment of the present disclosure can be used in conjunction with a syringe and a needle including a refill or a refill and a needle, which facilitates needle puncture and reduces the user's pain. The automated injection process reduces dependence on user experience and ensures that the injection process can be conveniently and efficiently performed at various suitable injection sites on the body. The cost is low and it is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In the drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with letter suffixes or different letter suffixes may represent different instances of similar parts. The accompanying drawings generally illustrate various embodiments by way of example and not limitation, and together with the specification and claims, are used to illustrate the disclosed embodiments. When appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts. Such embodiments are illustrative and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.

[0028] Figure 1 A schematic diagram showing an injection device according to an embodiment of the present disclosure;

[0029] 2( a ) and 2( b ) are diagrams showing a first example of an injection site fixer in an injection device according to an embodiment of the present disclosure in a natural state and a suction state of an injection site, respectively;

[0030] 3(a), 3(b) and 3(c) respectively show a second example of an injection site fixer in an injection device according to an embodiment of the present disclosure in a natural state, a squeezed state, and a squeezed and attracted state of an injection site;

[0031] Figure 4 A cross-sectional view showing an injection device according to an embodiment of the present disclosure;

[0032] Figure 5 An external schematic diagram showing an injection device according to an embodiment of the present disclosure;

[0033] 6(a), 6(b) and 6(c) are schematic diagrams respectively showing the injection device according to an embodiment of the present disclosure with the first cover, the second cover and the third cover removed;

[0034] Figure 7An exemplary injection flow chart using an injection device according to an embodiment of the present disclosure is shown;

[0035] Figure 8 An external schematic diagram showing an injection device according to an embodiment of the present disclosure;

[0036] Fig. 9 A schematic diagram showing how to assemble a cartridge and a needle of an injection device according to an embodiment of the present disclosure; and

[0037] Fig.10 An exemplary injection flow chart using an injection device according to an embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0038] In order to enable those skilled in the art to better understand the technical solution of the present disclosure, the present disclosure is described in detail below in conjunction with the drawings and specific implementation methods. The embodiments of the present disclosure are further described in detail below in conjunction with the drawings and specific implementation methods, but are not intended to limit the present disclosure.

[0039] The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different parts. The words "include" or "comprise" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0040] In the present disclosure, when a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device. When a specific device is described as being connected to other devices, the specific device may be directly connected to the other device without an intermediate device, or may not be directly connected to the other device but have an intermediate device.

[0041] All terms (including technical terms or scientific terms) used in the present disclosure have the same meanings as those understood by ordinary technicians in the field to which the present disclosure belongs, unless otherwise specifically defined. Note that in this article, the technical term "syringe" refers to an injection device that does not include a needle, such as an insulin injection pen without a needle. It should also be understood that terms defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined as such here.

[0042] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0043] Figure 1 Schematic diagram of an injection device according to an embodiment of the present disclosure is shown. Figure 1 As shown, the injection device 100 is configured to be loaded with a syringe 107 including a cartridge 108 and a needle 106 or a cartridge 108 (rather than the syringe 107) and a needle 106. The injection device 100 comprises: an injection site fixer 101, which is configured to fix the epidermis 103 and subcutaneous tissue 104 of the injection site; and a host 102 ( Figure 1 The injection site fixer 101 is fixed to the injection site fixer 101 and is configured to automatically perform the injection process on the fixed injection site. Before injection, the injection site fixer 101 can be placed on the injection site. When the injection is to be started, the injection site fixer 101 can be used to apply external force to the injection site, thereby fixing the epidermis 103 and subcutaneous tissue 104 of the injection site therein. Figure 1 As shown, since the epidermis 103 and the subcutaneous tissue 104 are located shallower than the muscle tissue 105, have a lower density than the muscle tissue 105, and are significantly softer and more mobile than the muscle tissue 105, under the external force of the injection site fixer 101, it is mainly the epidermis 103 and the subcutaneous tissue 104 that enter and are fixed by the injection site fixer 101, while the muscle tissue 105 rarely enters therein, thereby ensuring that the puncture depth of the needle 106 is limited to the fixed subcutaneous tissue 104 and does not enter the muscle tissue 105, thereby facilitating the puncture of the needle 106 and significantly reducing the pain felt by the user; and, by fixing and pressing the epidermis 103 and the subcutaneous tissue 104, their slippage and deformation during acupuncture are reduced, so that the acupuncture operation can be controlled more accurately.

[0044] The injection site fixture 101 may be implemented in various ways.

[0045] For example, the structures of the first example shown in FIG. 2( a) and FIG. 2( b) may be used. Figure 2(a) and 2(b)As shown, the injection site fixer 200 may include: a negative pressure suction mechanism (not shown) to generate negative pressure; a accommodating portion 203, which is configured to: receive and fix the epidermis and subcutaneous tissue 204 of the injection site through the action of negative pressure, and is provided with an opening to expose at least a portion of the received and fixed epidermis and subcutaneous tissue 204 of the injection site; and a height limiting portion 202, which is configured to: limit the height of the at least a portion of the exposed epidermis and subcutaneous tissue 204 of the injection site. By utilizing the height limiting portion 202, a margin can be provided for the rise of the epidermis and subcutaneous tissue 204 under the action of negative pressure (as shown in FIG. 2( b)), so that the acupuncture depth can be controlled more accurately, and the needle 205 can be prevented from accidentally piercing the exposed epidermis and subcutaneous tissue 204 in situations other than puncture and injection. In other words, the needle 205 can only actively and intentionally penetrate the epidermis and subcutaneous tissue 204 to an appropriate depth, and cannot be "passively" penetrated due to the rise of the epidermis and subcutaneous tissue 204, thereby improving the safety of the injection process.

[0046] In addition to the negative pressure suction mechanism, the injection site fixer 101 may also adopt a mechanical squeezing mechanism, or the negative pressure suction mechanism and the mechanical squeezing mechanism (not shown) may be combined, as shown in FIG. 3(a), FIG. 3(b) and FIG. 3(c), the accommodating portion 303, the height limiting portion 302, the epidermis and the subcutaneous tissue 304 may be similar to the accommodating portion 203, the height limiting portion 202, the epidermis and the subcutaneous tissue 204 in FIG. 2(a) and FIG. 2(b), respectively, and will not be repeated here. As shown in FIG. 3(a), the injection site fixer 300 may be placed on the injection site so that the end of the accommodating portion 303 contacts the epidermis. In some embodiments, the mechanical squeezing mechanism may be fixed to the accommodating portion 303 and configured to close the accommodating portion 303, as shown in FIG. 3(b), thereby applying pressure to the epidermis and the subcutaneous tissue 304 accommodated in the accommodating portion 303. The negative pressure suction mechanism (not shown) is then activated to further receive and fix the epidermis and the subcutaneous tissue 304 of the injection site by the negative pressure effect, as shown in FIG. 3(c). By combining negative pressure suction and mechanical extrusion, the injection site is easier to fix and has better applicability; the epidermis and subcutaneous tissue 304 entering the accommodating portion 303 are first gathered and then fixed by negative pressure suction, and the received pulling tension is smaller, which is more conducive to injection and significantly reduces the energy consumption of the negative pressure suction mechanism.

[0047] In some embodiments, when the injection site holder includes at least the negative pressure suction mechanism, the injection device may further include a pressure detector 305 configured to detect the pressure applied to the injection site by the injection site holder 300. The pressure applied to the injection site can be monitored by the pressure detector 305, thereby ensuring that the pressure is kept within a suitable range, so that the pressure is neither too high to cause excessive tension of the subcutaneous tissue 304 in the injection site holder 300, thereby hindering acupuncture and injection and affecting the accuracy of the injection dose, nor too low to cause the subcutaneous tissue 304 to relax, thereby failing to accurately control the acupuncture depth.

[0048] In some embodiments, the host 102 may include a microcontroller 306, which may be implemented by any one or more of a single chip microcomputer, a system on chip (SOC), an application specific integrated circuit (ASIC), or a field programmable gate array (FPGA). The microcontroller 306 may be configured to receive a signal indicating the pressure from the pressure detector 305, and send a pressure maintenance signal to the injection site fixture 300 when the pressure is within a preset range. In other words, the microcontroller 306 may autonomously determine the pressure borne by the subcutaneous tissue 304, and if the pressure is within the preset range (that is, the pressure is appropriate), the injection site fixture 300 may be instructed to maintain the current appropriate pressure via the pressure maintenance signal, so that the pressure can be continuously and stably maintained within an appropriate range, so that there is sufficient time to accurately implement acupuncture and injection. In some embodiments, the microcontroller unit 306 can also issue instructions in real time based on the pressure signal from the pressure detector 305 to adjust the pressure to an appropriate range. For example, if the pressure is too high, a pressure release signal is sent, and if the pressure is too low, a pressure increase signal is sent, thereby achieving dynamic real-time adjustment of the tension of the subcutaneous tissue 304, thereby ensuring precise control of the acupuncture depth and the accuracy of the injection dose.

[0049] In some embodiments, the injection site fixer 101 can be constructed as a silicone device, so that it is more comfortable to use and can better fit the epidermis. As an example, the accommodating portion 303 can be disc-shaped and have an arched cross-section, as shown in Figures 3(b) and 3(c). The disc-shaped and arched cross-section structure conforms to the shape of the epidermis and subcutaneous tissue 304 after being compressed / attracted, so that it fits better with it and has a better fixing effect. As an example, the height limiting portion 302 can be arranged on the outside (periphery) of the opening (for the needle to penetrate), so as to avoid obstructing the penetration of the needle and expose the injection site to a greater extent.

[0050] In some embodiments, the height limiting portion 302 may also include an inwardly extending portion (eg, Figure 3(a)-Figure 3(c)That is to say, the height limiting portion 302 can at least partially extend inward (note that the opening for the needle to penetrate is located on the inner side of the inward extending portion), and these inward extending portions can act as baffles to prevent the epidermis and subcutaneous tissue 304 from being compressed / sucked and irregularly (e.g., intermittently) overflowing upward, thereby maintaining the flatness of the surface of the exposed portion and reducing obstruction and interference to acupuncture, thereby being able to more accurately control the subcutaneous penetration depth.

[0051] In some embodiments, when the injection site fixture includes at least a negative pressure suction mechanism (not shown), such as injection site fixtures 200 and 300, the injection device may further include a needle sealing mechanism, such as 201 or 301, which is configured to seal between the needle and the injection site fixture 200 or 300, thereby preventing air leakage and improving the efficiency of negative pressure suction.

[0052] Figure 4 A cross-sectional view of an injection device according to an embodiment of the present disclosure is shown, noting that Figure 4 The injection device is loaded with a syringe 404 and a needle 414, but this is only for example. In other embodiments, a pen core and a needle 414 may also be loaded, and the relevant components may be slightly modified to be applicable.

[0053] like Figure 4 As shown, the host 411 may include: a first drive mechanism 403, which is configured to drive (e.g., a syringe 404) to inject in response to an injection drive signal; a second drive mechanism 406, which is configured to drive the needle 414 to pierce the injection site in response to an acupuncture drive signal; and a micro control unit 415, which is configured to receive a signal indicating the pressure from a pressure detector (not shown), and when the pressure is within a preset range, send the acupuncture drive signal to the second drive mechanism 406 and send the injection drive signal to the first drive mechanism 403. In this way, the micro control unit 415 can be used to monitor the pressure applied to the injection site in real time. When the pressure is appropriate, that is, the pressure is not too high to cause excessive tension of the subcutaneous tissue in the injection site fixture 409, or even hinder acupuncture injection or affect the accuracy of the injection dose, and is not too low to cause the subcutaneous tissue to relax and make it impossible to accurately control the acupuncture depth, the first drive mechanism 403 and the second drive mechanism 406 are automatically controlled to perform acupuncture and injection operations in sequence without manual intervention. In some embodiments, the second drive mechanism 406 can drive the needle 414 into the subcutaneous tissue to a suitable depth, thereby avoiding penetration into muscle tissue that would cause obstruction and pain.

[0054] In some embodiments, the syringe 404 may be provided with a dose adjustment mechanism (e.g., an adjustment knob) 402, and the user may rotate the dose adjustment mechanism 402 to preset the dose to be injected. In the case of loading the refill and the needle 414, the dose adjustment mechanism 402 may be provided on the host 411 instead. The host 411 may also include: a dose adjustment detection mechanism 401, which is configured to detect the operating state of the dose adjustment mechanism 402 and send a corresponding dose adjustment indication signal. As an example, the dose adjustment detection mechanism 401 may be implemented using a pressure-sensitive element. The microcontroller unit 415 is also configured to: receive the dose adjustment indication signal, and when the dose adjustment indication signal indicates that a dose adjustment has been made, allow the injection site fixer 409 to be actuated to perform fixation. It should be noted that the expression "under the condition of..." in various places in this document is intended to mean that confirming that the dosage adjustment has been performed can be a sufficient condition for actuating the injection site fixer 409. In some embodiments, it can also be just a necessary condition for the injection site fixer 409. For example, the injection site fixer 409 can be actuated to perform fixation only when several other conditions are also met (including but not limited to the syringe 404 and the needle 414 are assembled in place, the user presses the injection button so that an injection start signal is sent to the microcontroller unit 415, etc.).

[0055] In some embodiments, the microcontroller unit 415 can autonomously identify whether the user has completed the injection dose adjustment through the dose adjustment detection mechanism 401. If not, no injection steps are initiated, such as but not limited to injection site fixation, but prompt information is given through vision or hearing to remind the user to adjust the injection dose. In this way, invalid or erroneous injection site fixation, acupuncture and injection operations without a preset injection dose can be avoided, thereby saving energy consumption and improving safety.

[0056] In some embodiments, the first drive mechanism 403 can be connected to the dose adjustment mechanism 402 of the syringe 404. Thus, as the first drive mechanism 403 drives the dose adjustment mechanism 402 of the syringe 404, the dose adjustment mechanism 402 pushes the piston in the cartridge, and accordingly injects the medicine in the cartridge into the subcutaneous tissue. When the preset injection dose is injected into the subcutaneous tissue, the dose adjustment mechanism 402 returns to zero position accordingly. In some embodiments, the dose adjustment mechanism 402 can also be arranged on the host 411 instead of the syringe 404, and the first drive mechanism 403 can be connected to the dose adjustment mechanism 402 arranged on the host 411.

[0057] For example, when the dose adjustment mechanism 402 is stuck in a non-zero position, it is very likely that the needle 414 is blocked. In some embodiments, the (operation) state of the dose adjustment mechanism 402 is not limited to whether the dose adjustment is performed, but may also include whether the needle 414 is blocked and whether the dose adjustment mechanism 402 is pushed back to the zero position, and the dose adjustment indication signal may also reflect these operation states accordingly. The microcontroller unit 415 may send corresponding control instructions according to the specific operation state to control the corresponding components to perform corresponding operations, for example, through the status indicator light on the surface of the injection device to remind that the needle 414 is blocked or the injection is completed, actuate the injection site fixing position 409 to release the pressure, and then send a reset drive signal to the second drive mechanism 406 to perform the needle removal operation, etc.

[0058] In some embodiments, the host 411 may further include: an in-situ detection mechanism 407, which is configured to: detect whether the syringe 404 and the needle 414 are assembled in place when the injection device is configured to be loaded with the syringe 404 and the needle 414 (if the injection device is configured to be loaded with the refill and the needle, detect whether the refill and the needle are assembled in place), and send a corresponding in-situ detection signal. The micro control unit 415 may be configured to: receive the in-situ detection signal, and when the in-situ detection signal indicates that the assembly is in place, allow the injection site fixer 409 to be actuated to perform fixation, so as to avoid invalid or erroneous fixation operations, thereby saving energy consumption and improving safety.

[0059] In some embodiments, the host 411 may be provided with a syringe locking mechanism 405, which is configured to lock and unlock the syringe 404. For example, when the syringe 404 is to be loaded, the syringe locking mechanism 405 may be unlocked in advance, and after the syringe 404 is assembled in place, the syringe locking mechanism 405 may automatically lock it to avoid the shaking of the syringe during subsequent acupuncture and injection processes, thereby improving the accuracy of the operation. For example, the syringe locking mechanism 405 may be implemented in various ways such as snap-fitting and magnetic coupling.

[0060] In some embodiments, Figure 5As shown, the host 511 may also include an injection button 503. The injection button 503 may be exposed from the outer surface of the injection device to facilitate the user's pressing operation, and send a start signal in response to the pressing operation. Among them, the micro-control unit 415 may also be configured to: after receiving the start signal, actuate the dose adjustment detection mechanism 401 and the in-situ detection mechanism 407 to perform detection; when the in-situ detection signal indicates that the assembly is in place and the dose adjustment indication signal indicates that the dose adjustment has been performed, actuate the injection site fixer 409 to perform fixation. After the injection site is fixed, as described above, the micro-control unit 415 may receive a signal indicating the pressure size from a pressure detector (not shown), and when the pressure is within a preset range, successively send the acupuncture drive signal to the second drive mechanism 406 and the injection drive signal to the first drive mechanism 403, so as to perform acupuncture and injection when the injection site is subjected to appropriate pressure, so as to accurately control the acupuncture depth and take into account the accuracy of the injection dose. In some embodiments, the microcontroller unit 415 can also be configured to: when the injection completion conditions are met, actuate the injection site fixture 409 to perform pressure release, thereby loosening the epidermis and subcutaneous tissue at the injection site, and then send the reset drive signal to the second drive mechanism 406 to drive the needle 414 to withdraw from the relaxed epidermis and subcutaneous tissue at the injection site, thereby avoiding the reflux of the drug due to tension when the needle 414 withdraws from the tensioned injection site. The loss caused by the reflux of the drug is very considerable in the application of trace drugs such as insulin. Through the above process, the injection device can realize a complete injection process of "one-button" automatic injection site fixation, acupuncture, injection and needle removal with extremely high user friendliness. The user only needs to adjust the dosage adjustment mechanism 402 to preset the injection dosage as needed and load the syringe 404 and the needle 414 into the injection device, and then press the injection button 503. The injection device can autonomously fix the epidermis and subcutaneous tissue of the injection site without human intervention and keep the pressure dynamics within an appropriate range, while performing acupuncture at an appropriate depth and performing precise injection of the preset injection dosage, and then relax the epidermis and subcutaneous tissue of the injection site and conveniently remove the needle 414 therefrom. The operation is simple, significantly reduces the user's pain, and reduces the waste of medicine.

[0061] In some embodiments, the microcontroller unit 415 can also perform a determination of whether the injection site meets the acupuncture start condition in response to the start signal, and only send the acupuncture drive signal to the second drive mechanism 406 when the injection site meets the acupuncture start condition. In some embodiments, the acupuncture start condition includes at least one of the following: when the injection site fixer 409 includes at least the negative pressure suction mechanism, the pressure in the injection site fixer 409 is within a preset range and can be maintained; when the injection site fixer 409 includes a mechanical squeezing mechanism, the mechanical squeezing mechanism completes the fixation of the injection site. In particular, when a mechanical squeezing mechanism is used, the mechanical squeezing mechanism usually uses the inward feeding of the clamp to achieve mechanical squeezing, and the feeding amount can be pre-set. The injection site is fixed only after the feeding amount is completed. At this time, the injection site starts with less vibration and higher accuracy, avoiding acupuncture in the middle of feeding. In the case of using a negative pressure suction mechanism, the pressure of the injection site fixer 409 is maintained within a preset range within a predetermined time period, and the tension of the subcutaneous tissue at the injection site is not too large to hinder acupuncture, nor too low to cause the subcutaneous tissue to relax, so that the acupuncture operation is performed accurately and precisely. In the case where the injection site fixer 409 combines both the negative pressure suction mechanism and the mechanical squeezing mechanism, it can be determined whether the two meet the above-mentioned acupuncture start conditions. If yes, it is ensured that the fixed state of the injection site is ready for acupuncture, and the acupuncture operation is more accurate and precise.

[0062] In some embodiments, different injection completion conditions can be set, for example, the injection completion condition can be that the dose adjustment mechanism 402 returns to the zero position (that is, the preset injection volume has been injected), the needle 414 stays in the subcutaneous tissue for a set threshold time, or needle blockage is detected, for example but not limited to the dose adjustment mechanism 402 being stuck in a non-zero position. By taking into account the abnormal injection completion condition of needle 414 blockage, the needle 414 can be reset and pulled out in the case of needle 414 blockage, thereby avoiding ineffective injection, waste of medicine, and the risk of continued ineffective injection when the needle 414 is blocked.

[0063] Figure 5 The external schematic diagram of the injection device 500 according to the embodiment of the present disclosure is shown. As an example, the injection device 500 is used in conjunction with a syringe and a needle. Of course, the structure of the injection device 500 can also be adjusted to be used in conjunction with a pen core and a needle. Figure 5 As shown, the injection device 500 may include a first cover 510 (in a manner removably connected to the main body) Figure 4 410), a second cover 512 (in Figure 4 412) and a third cover 513 (in Figure 4413 in the figure). The first cover 510 may be configured to be used to load the syringe 507 into the main unit 511 (as shown in FIG. 6(a)) or to be removed from the main unit 511 in a disassembled state (e.g., an open state). The second cover 512 may be configured to be used to load or remove the needle 508 in a disassembled state (e.g., an open state). When the needle 508 is to be removed after the injection, the second cover 512 may be opened (as shown in FIG. 6(b)), the needle cap 514 may be closed to cooperate with the needle 508 (screwed or snapped) to form a whole, and then the needle cap 514 may be held and unscrewed from the needle 508 and discarded. In this way, the loading or removal of the needle 508 is facilitated, especially when the needle 508 is removed, the user is prevented from contacting the needle 508, thereby improving safety and preventing the needle 508 and the residual medicine therein from polluting the environment. The third cover 513 may be configured to be detachably connected to a side of the second cover 512 opposite to the first cover 510, and to expose the accommodating portion 509 of the injection site fixture in a detached state (e.g., an open state) (as shown in FIG. 6( c )). The first cover 510, the second cover 512, and the third cover 513 may respectively enclose the syringe 507, the needle 508, and the injection site fixture in a closed state to prevent them from being contaminated by the external environment or contaminating the external environment.

[0064] In some embodiments, see Figure 4 As shown, in the case where the injection site fixture 409 includes at least the negative pressure suction mechanism (not shown), a needle sealing mechanism 408 and the injection site fixture 409 can be provided in the second cover 412. When the second cover 412 is closed, the needle sealing mechanism 408 is connected to the needle 414 in an airtight manner, thereby achieving an airtight seal of the needle 414 relative to the injection site fixture 409, thereby significantly improving its use efficiency when the injection site fixture 409 at least adopts the negative pressure suction mechanism.

[0065] Back to Figure 5 The injection device 500 is also provided with a power button 502 and an injection button 503 on its exterior. The user can start or shut down the injection device 500 by pressing the power button 502. In addition, as described above, the user only needs to assemble the syringe and needle with the set dose, and then press the injection button 503, and the injection device 500 can automatically and accurately and smoothly perform the injection site fixation, acupuncture, injection, and needle removal operations in sequence, which is simple to operate and significantly reduces the user's pain.

[0066] The injection device 500 may also be provided with an injection dose window 501, a status indicator light 504, a drug amount window 505, and a battery status indicator light 506 on the outside. The injection dose window 501 can be used to observe whether the syringe has been dosed and the adjusted injection dose. The drug amount window 505 can be used to observe the remaining amount of drug in the cartridge and whether there are bubbles, so as to determine whether it is necessary to remove the bubbles or replace a new cartridge. The status indicator light 504 allows the user to clearly identify which operation step of all operation steps such as syringe installation, injection dose adjustment, and injection site fixation the entire injection process has reached, and / or also indicates the execution status of each operation step, which is green if the operation is successful and red if the operation fails. If the operation step has not yet been reached, the corresponding indicator light is off. The battery status indicator light 506 can be used to display the battery installation status (whether installed) and / or the battery remaining power status. For example, when the battery remaining power is too low, the battery status indicator light 506 can be red and flashing, indicating that the remaining power is too low and the injection cannot be completed, thereby avoiding invalid injection (for example, the injection process is interrupted before completion due to insufficient power); for another example, when the battery is not installed, the battery status indicator light 506 can be red, prompting the user to install the battery.

[0067] Figure 7 An exemplary injection flow chart using an injection device according to an embodiment of the present disclosure is shown. The injection process 700 begins with step 701: opening the syringe disassembly cover, loading the syringe with the cartridge into the main body of the injection device and locking it, and then closing the syringe disassembly cover. This step 701 is usually performed when the injection device is used for the first time or the syringe is replaced with a new cartridge, otherwise it can be skipped. In some embodiments, when loading the syringe, the dose display window of the syringe needs to be aligned with the window on the main body of the injection device. If the two windows are not aligned, the adjusted dose cannot be seen. After being installed in place, the syringe can be automatically locked using a locking mechanism.

[0068] In step 702, the needle disassembly cover is opened, a new needle is installed, and the needle cap is removed. Then, in step 703, the syringe disassembly cover is opened to complete the air bubble removal operation. The air bubble removal operation can be used to determine whether the needle is blocked (step 704). If so, return to step 702, replace the needle and verify whether the needle is unobstructed. If not, proceed to the dose adjustment step 705, the injection dose can be adjusted by the dose adjustment mechanism of the syringe, and then the syringe disassembly cover and the needle disassembly cover are closed (step 706).

[0069] Then, the injection site fixing operation step is performed. In step 707, the injection cover is opened to expose the receiving portion of the injection site fixer (e.g., injection tray). The injection tray can be placed on the injection site and the start injection button is pressed (step 708). After the start injection button is pressed, the microcontroller in the host performs a series of judgments and automatically drives the corresponding components to perform the fixing, acupuncture, injection and needle removal operations in sequence.

[0070] Specifically, in step 709, it is detected whether the syringe is installed in place (whether it is loaded and locked), and in step 710, it is determined whether the injection dose adjustment mechanism has completed the dose adjustment. If it is detected that the syringe is not installed in place, the injection site fixation will not be started, and a prompt message that the syringe is not installed is given through the status indicator light, prompting the user to reinstall the syringe. If it is detected that the dose adjustment mechanism is still in the zero position, the injection site fixation will not be started, and the status indicator light will prompt the user to adjust the injection dose. If it is detected that the syringe is installed in place and the dose adjustment has been completed, it is continued to determine whether the needle is installed in step 711. If so, the injection disk will be driven to pressurize to fix the epidermis and subcutaneous tissue of the injection site.

[0071] In step 713, it is determined whether the injection site is fixed. Specifically, the pressure in the injection tray can be detected by a pressure sensor. When the pressure is within an appropriate range, it is determined that the injection site has been fixed. If not, the pressure in the injection tray is adjusted until it is within an appropriate range to achieve the fixation of the injection site. Then, in step 714, the pressurization is stopped, and the pressure applied to the injection site in the injection tray is kept substantially constant, and the syringe is driven to complete acupuncture and injection. Specifically, after the injection site is fixed, the microcontroller unit of the injection device can send an acupuncture instruction to the syringe drive mechanism to drive the needle to pierce the subcutaneous tissue at a very fast speed, and then start the injection drive mechanism in the syringe disassembly cover to smoothly perform the injection until the dose adjustment mechanism of the syringe is pushed to zero to complete the injection of the preset dose.

[0072] After the injection is completed, the needle stays in the subcutaneous tissue for a few seconds, and then the pressure applied to the injection site is released (step 715). In step 716, the syringe drive mechanism pushes the syringe to pull out the needle and reset the syringe. In step 717, the injection device can be removed from the injection site, the injection cover is closed, the needle disassembly cover is opened, and the needle cap is installed on the needle, so that the needle and the needle cap are unscrewed and thrown into the waste storage box. Then, in step 718, the needle disassembly cover is closed, the injection device is stored, and an injection operation is completed.

[0073] Figure 8 FIG. 8 is an external schematic diagram of an injection device 800 according to an embodiment of the present disclosure, and the injection device 800 is used in conjunction with a pen cartridge and a needle. Figure 8As shown, the host 811 of the injection device 800 may include a power button 802, an injection button 803, an injection dosage window 801, a status indicator light 804, a drug dosage window 805 and a battery status indicator light 806. The structures and functions of these components are similar to those of Figure 5 The power on / off button 502, injection button 503, injection dosage window 501, status indicator light 504, drug dosage window 505 and battery status indicator light 506 of the main body 511 of the injection device 500 are similar and are not described in detail here.

[0074] Different from Figure 5 In the injection device 800 shown, the injection dosage adjustment mechanism 807 is not provided by the syringe itself, but is disposed in the main body 811 and partially exposed from the housing of the main body 811, so that the user can conveniently rotate and adjust it from the outside of the main body 811. In addition, the injection device 800 may include two covers, namely, a second cover 812 and a third cover 813. The second cover 812 is used for the disassembly and assembly of both the pen core and the needle, and the structure and function of the third cover 813 are similar to those of the injection device 800. Figure 5 The third cover 513 is similar and will not be described here.

[0075] Fig. 9 Schematic diagram showing how to assemble a cartridge 904 and a needle 906 in an injection device 900 according to an embodiment of the present disclosure. Fig. 9 As shown, the injection device 900 may include a second cover 912 and a third cover 913 connected to a host (not shown) in a detachable manner (e.g., openable or closable), wherein the second cover 912 may be constructed to be used for loading or removing the refill 904 and the needle 906 in a detachable (open) state; the third cover 913 may be constructed to be detachably connected to a side of the second cover 912 opposite to the host, and to expose a receiving portion of an injection site fixture (not shown, similar to that shown in FIG. 6( c) ) in a detachable state.

[0076] The injection device 900 may be provided with a detachable cartridge mounting frame 905. The second cover 912 and the third cover 913 may be opened, and the cartridge mounting frame 905 may be taken out, the cartridge 904 may be assembled to the cartridge mounting frame 905, and then the cartridge mounting frame 905 containing the cartridge 904 may be reinstalled into the injection device 900 and locked. For example, a fixing mechanism and / or a locking mechanism for the cartridge mounting frame 905 may be provided in the main body of the injection device 900 to facilitate the fixing and / or locking of the cartridge mounting frame 905. In some embodiments, the injection device 900 may be provided with an in-position detection mechanism 907, which is configured to detect whether the cartridge mounting frame 905 and the needle 906 are in position. If so, and the injection dose is preset and the injection site is properly fixed, the needle 906 may be driven to perform acupuncture, and then the piston in the cartridge 904 may be driven to perform injection of the preset dose. After the injection is completed, the cartridge mounting frame 905 may be driven to pull out the needle, and so on. In some embodiments, a piston 908 may be provided on the pen core 904, and the injection drive mechanism may push the piston 908 to perform injection, and the injection drive mechanism may be connected to the injection dose adjustment mechanism and the piston 908 in the pen core 904. As the injection drive mechanism pushes the piston 908, the injection dose adjustment mechanism rotates the corresponding scale toward the zero position, and returns to the zero position when the injection is completed.

[0077] Fig.10 FIG. 1 is a flow chart showing an exemplary injection process 1000 using an injection device according to an embodiment of the present disclosure. Fig.10 As shown, the injection process 1000 starts at step 1001: open the refill and needle disassembly cover. If the refill has not been installed, the refill needs to be installed first, and then the needle is installed on the refill; if the refill has been installed, only the new needle is installed. In step 1002, the air bubble operation is performed to ensure that the needle is not blocked. In step 1003, after the air bubble operation is completed, the needle disassembly cover can be closed, and then the injection dose can be adjusted through the dose adjustment mechanism to preset the dose to be injected.

[0078] In step 1004, the injection cover is opened to expose the receiving part of the injection site fixer. Here, the suction cup as the receiving part is exposed as an example for explanation. In step 1005, the suction cup can be placed on the injection site, and the injection start button is pressed, and then the microcontroller in the injection device automatically controls the entire process of fixation, acupuncture, injection and needle removal.

[0079] Specifically, after pressing the injection start button, first check whether the refill and needle are installed in place (step 1006), and whether the injection dose adjustment is completed (step 1007). If it is detected that the refill and needle are not installed in place, the injection site fixation will not be started, and a prompt message that the refill and needle are not installed will be given through the status indicator light, prompting the user to reinstall the refill and needle. If it is detected that the injection dose adjustment has not been completed, the injection site fixation will not be started, and the user will be prompted to adjust the injection dose through the status indicator light. If it is determined that the refill and needle are installed in place and the injection dose adjustment has been completed, the injection site fixer will be driven to fix the epidermis and subcutaneous tissue of the injection site, for example, pressure can be applied to the injection tray (which can be implemented as a suction cup) to press and fix the epidermis and subcutaneous tissue of the injection site in the suction cup (see step 1008). The pressure sensor can be used to detect whether the pressure on the epidermis and subcutaneous tissue in the suction cup is within an appropriate range. If so, it is determined that the injection site is fixed (see step 1009). If not, the pressure applied by the injection site fixer continues to be adjusted until the pressure is within an appropriate range and the appropriate pressure is maintained to perform subsequent operations.

[0080] For example, in step 1010, the microcontroller unit of the injection device can send a needle puncture instruction to the pen core drive mechanism. Since the pen core and the needle are assembled as one, the pen core drive mechanism can drive the pen core and the needle to penetrate the subcutaneous tissue at a very fast speed, and then send an injection instruction to the injection drive mechanism. The injection drive mechanism can push the piston on the pen core to inject a preset dose of medicine into the subcutaneous tissue.

[0081] After the injection is completed, the needle can stay in the subcutaneous tissue for a few seconds, and then the pressure applied to the injection site is released (step 1011). Then, the microcontroller unit of the injection device can send a needle removal instruction to the cartridge drive mechanism, and the cartridge drive mechanism can drive the cartridge together with the needle to remove the needle, and reset the cartridge and the needle (step 1012).

[0082] Next, the injection device can be removed from the injection site, the injection cover can be closed, the needle disassembly cover can be opened, the needle cap can be covered to be snapped together with the needle, and then the needle cap can be conveniently held and removed together with the used needle and thrown into the waste storage box (step 1013). In this way, the injection device can be stored and the injection is completed.

[0083] In addition, although exemplary embodiments have been described herein, the scope includes any and all embodiments based on the present disclosure with equivalent elements, modifications, omissions, combinations (e.g., various embodiments intersecting schemes), adaptations or changes. The elements in the claims will be interpreted broadly based on the language adopted in the claims, and are not limited to the examples described in this specification or during the implementation of this application, and the examples will be interpreted as non-exclusive. Therefore, this specification and examples are intended to be considered as examples only, and the true scope and spirit are indicated by the following claims and the full scope of their equivalents.

[0084] The above description is intended to be illustrative rather than restrictive. For example, the above examples (or one or more of them) can be used in combination with each other. For example, a person of ordinary skill in the art can use other embodiments when reading the above description. In addition, in the above-mentioned specific embodiments, various features can be grouped together to simplify the present disclosure. This should not be interpreted as an intention that a disclosed feature that is not required to be protected is necessary for any claim. On the contrary, the subject matter of the present invention may be less than all the features of a specific disclosed embodiment. Thus, the following claims are incorporated into the specific embodiments as examples or embodiments, wherein each claim is independently used as a separate embodiment, and it is considered that these embodiments can be combined with each other in various combinations or arrangements. The scope of the present invention should be determined with reference to the attached claims and the full scope of equivalent forms granted by these claims.

[0085] The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention. The protection scope of the present invention is defined by the claims. Those skilled in the art may make various modifications or equivalent substitutions to the present invention within the essence and protection scope of the present invention, and such modifications or equivalent substitutions shall also be deemed to fall within the protection scope of the present invention.

Claims

1. An injection device, which is configured to be loaded with a syringe including a cartridge and a needle, or a cartridge and a needle, characterized in that: The injection device comprises: Injection site retainer, including: At least one of a negative pressure suction mechanism and a mechanical squeezing mechanism; The receiving portion is disc-shaped and has an arched cross section, and is used to lift, gather and fix the epidermis and subcutaneous tissue of the injection site by at least one of a negative pressure suction mechanism and a mechanical squeezing mechanism, and is provided with an opening to expose at least a part of the lifted, gathered and fixed epidermis and subcutaneous tissue of the injection site; The height limiting portion is constructed as follows: having an inwardly extending portion, the opening of the accommodating portion is located inside the inwardly extending portion, so that the height of the at least a portion of the exposed epidermis and subcutaneous tissue of the injection site is lower than the height of the inwardly extending portion, and the centered needle can only actively penetrate into the epidermis and subcutaneous tissue at an appropriate depth, and will not penetrate due to the rise of the epidermis and subcutaneous tissue; A host connected to the injection site fixer and configured to drive the needle to automatically perform an injection process on the fixed injection site; The injection device further comprises a pressure detector, which is arranged at the bottom end of the height limiting portion and is close to the epidermis of the injection site when the epidermis and subcutaneous tissue of the injection site are raised, and is configured to detect the pressure applied by the injection site fixer to the injection site; The host also includes a microcontroller unit, which is configured to: receive a signal indicating the pressure size from the pressure detector, and send a pressure maintenance signal to the injection site fixator when the pressure is within a preset range; send a pressure release signal to the injection site fixator when the pressure exceeds the preset range and is too large, and send a pressure increase signal to the injection site fixator when the pressure exceeds the preset range and is too small, so as to achieve dynamic real-time adjustment of the tension of the subcutaneous tissue, so as to accurately control the acupuncture depth and injection dose.

2. The injection device according to claim 1, characterized in that In the case where the injection site holder includes at least the negative pressure suction mechanism, the injection device further includes a needle sealing mechanism configured to seal between the needle and the injection site holder.

3. The injection device according to claim 1, characterized in that The host also includes: a first drive mechanism configured to drive injection in response to an injection drive signal; a second drive mechanism configured to drive the needle to penetrate the injection site in response to a needle penetration drive signal; The microcontrol unit is configured to receive a signal indicating the pressure from the pressure detector, and when the pressure is within a preset range, send the acupuncture drive signal to the second drive mechanism and send the injection drive signal to the first drive mechanism.

4. The injection device according to claim 3, characterized in that The syringe is provided with a dosage adjustment mechanism or the host is provided with a dosage adjustment mechanism, and the host further comprises: a dose adjustment detection mechanism, which is configured to detect the state of the dose adjustment mechanism and send a corresponding dose adjustment indication signal; Wherein, the micro control unit is further configured to: receive the dose adjustment indication signal, and allow the injection site fixer to be actuated to perform fixation when the dose adjustment indication signal indicates that the dose adjustment has been performed.

5. The injection device according to claim 4, characterized in that The first drive mechanism is connected to the dose adjustment mechanism of the syringe, or to the dose adjustment mechanism provided on the host, and the state of the dose adjustment mechanism includes whether the dose adjustment is performed, whether the needle is blocked, and whether the dose adjustment mechanism is pushed back to zero position.

6. The injection device according to claim 3, characterized in that The host also includes: an in-place detection mechanism, which is configured to: detect whether the syringe and the needle are assembled in place when the injection device is configured to be loaded with the syringe and the needle, and detect whether the pen core and the needle are assembled in place when the injection device is configured to be loaded with the pen core and the needle, and send a corresponding in-place detection signal; Wherein, the micro control unit is configured to: receive the in-place detection signal, and allow the injection site fixer to be actuated to perform fixation when the in-place detection signal indicates that the assembly is in place.

7. The injection device according to claim 4, characterized in that The host also includes: an in-place detection mechanism, which is configured to: detect whether the syringe and the needle are assembled in place when the injection device is configured to be loaded with the syringe and the needle, and detect whether the pen core and the needle are assembled in place when the injection device is configured to be loaded with the pen core and the needle, and send a corresponding in-place detection signal; an injection button configured to send a start signal when pressed; Wherein, the microcontroller unit is further configured to: after receiving the start signal, actuate the dose adjustment detection mechanism and the in-place detection mechanism to perform detection; and actuate the injection site fixer to perform fixation when the in-place detection signal indicates that the assembly is in place and the dose adjustment indication signal indicates that the dose adjustment has been performed.

8. The injection device according to claim 1, characterized in that The host also includes: a first drive mechanism configured to drive injection in response to an injection drive signal; a second drive mechanism configured to drive the needle to penetrate the injection site in response to a needle penetration drive signal; an injection button configured to send a start signal when pressed; The micro control unit is configured to: in response to the start signal, send the acupuncture drive signal to the second drive mechanism when the injection site meets the acupuncture start condition.

9. The injection device according to claim 8, characterized in that The acupuncture initiation condition includes at least one of the following: In the case where the injection site holder includes at least the negative pressure suction mechanism, the pressure in the injection site holder is within a preset range and can be maintained; In case the injection site fixator comprises only a mechanical compression mechanism, the mechanical compression mechanism completes the injection site fixation.

10. The injection device according to claim 4, characterized in that The second driving mechanism is further configured to: drive the needle to reset in response to a reset driving signal; The micro control unit is further configured to: when an injection completion condition is met, actuate the injection site fixture to perform release, and then send the reset drive signal to the second drive mechanism.

11. The injection device according to claim 10, characterized in that The injection completion condition includes at least one of the following: The dosage adjustment mechanism returns to the zero position; The needle stays in the subcutaneous tissue for a time that reaches a set threshold; Needle obstruction detected.

12. The injection device according to claim 1, characterized in that The injection device, when configured to accommodate a syringe and a needle, further comprises a first cover, a second cover and a third cover detachably connected to the main body, Wherein, the first cover is configured to: in a disassembled state, be used to load the syringe into the host; The second cover is configured to be used for loading or removing the needle in a disassembled state; The third cover is configured to be detachably connected to a side of the second cover opposite to the first cover, and to expose the receiving portion of the injection site holder in a detached state.

13. The injection device according to claim 1, characterized in that The injection device, when configured to accommodate a cartridge and a needle, further comprises a second cover and a third cover detachably connected to the main unit. Wherein, the second cover is configured to: in a disassembled state, be used to load or remove the pen core and the needle; The third cover is configured to be detachably connected to a side of the second cover opposite to the main body, and to expose the receiving portion of the injection site holder in a detached state.

14. The injection device according to claim 12 or 13, characterized in that In the case where the injection site holder includes at least the negative pressure suction mechanism, a needle sealing mechanism and the injection site holder are provided in the second cover. When the second cover is closed, the needle sealing mechanism is connected to the needle in an airtight manner to achieve an airtight seal of the needle relative to the injection site holder.

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