Face shell quick release assembly of injection hand tool

Abstract

The utility model relates to the field of medical equipment, in particular to a face shell quick release assembly of an injection hand tool. The injection hand tool comprises a hand tool main body, a surface shell quick release assembly and a surface shell, wherein the hand tool main body comprises a first cover plate; the face shell quick-release assembly comprises a face shell support, a magnetic element and a fixing screw. The magnetic element is arranged on the first cover plate, a clamping hole is formed in the face shell support, a clamping space and a first hole are formed in the clamping hole, the clamping space is used for containing the magnetic element, a fixing channel is formed in the face shell, and the fixing screw penetrates through the first hole and is inserted into the fixing channel. And connecting the surface shell and the surface shell bracket with the first cover plate through the magnetic element. The face shell can be suitable for the scene where different liquid medicine needs to be replaced for continuous injection, the face shell can be detached only by simply applying external force, follow-up consumable replacement is facilitated, and the detaching time of operators is shortened.

Description

Technical Field

[0001] This utility model relates to the field of medical devices, specifically to a quick-release assembly for the faceplate of an injection handpiece. Background Technology

[0002] Needle-free injection is an injection method that eliminates the need for traditional needles. It uses pressure to diffuse medication into the user's subcutaneous tissue. Because this method is painless and does not cause fear, it is becoming increasingly popular, and needle-free injectors are being widely used in the field of cosmetic dermatology. Current technology has improved the power structure of needle-free injectors to enable high-frequency drug injection, such as using an electromagnet to drive a piston to reciprocate within the injector. This allows for high-speed and repeated drug injection. However, the piston and electromagnetic drive generate heat after high-speed operation, which can affect the injection effect and prevent the needle-free injection device from maintaining high-frequency injection. Furthermore, even after cleaning and sterilization, existing electric injection devices are still prone to drug mixing, leading to cross-contamination.

[0003] 1. Poor heat dissipation

[0004] Utility model patent application CN221636956U discloses an electromagnetic drive structure for a needle-free injection device. This electromagnetic drive structure includes a main unit of the needle-free injection device, an electromagnetic coil, and a piston rod. The main unit includes a housing and a mounting sleeve. The mounting sleeve is disposed inside the housing and has a telescopic cavity in its center. The piston rod has an electromagnetic drive unit housed within the telescopic cavity. The electromagnetic coil is sleeved and mounted on the outside of the mounting sleeve. The electromagnetic drive unit moves within the telescopic cavity under the drive of the electromagnetic coil. A sealed cooling cavity is provided between the mounting sleeve and the electromagnetic coil and the telescopic cavity. The cooling cavity is connected to coolant outside the housing via a cooling pipe.

[0005] Utility model announcement CN221636956U discloses a contactless electromagnetic injection system, including a contactless electromagnetic injector and a control host. The contactless electromagnetic injector includes a contactless electromagnetic injection head, an energy supply unit, and a temperature control unit. The contactless electromagnetic injection head includes a solution holding chamber, a nozzle, and a solution supply unit, which are connected to the solution holding chamber. The contactless electromagnetic injection head is equipped with an elastic sealing component. The energy supply unit includes an impact hammer, an electromagnetic acceleration component, an electromagnetic projectile, and an elastic reset component. This solution uses a water circulation chamber and an external circulating water tank for temperature regulation.

[0006] Most existing technologies achieve heat dissipation by connecting an external cooling medium to the injection device. However, this requires pipes and other structures to connect the cooling medium to the injection device, which is not only complicated to operate, but also increases the size of the injection device, reduces its flexibility, and has poor cooling effect and efficiency.

[0007] 2. Incomplete disinfection and cleaning leading to cross-infection

[0008] Utility model patent CN221636956U discloses an electric needleless injector for livestock. This injector includes a syringe, a battery, a switch, an air tube, a solenoid valve, and a solenoid valve 1. An adjusting block is fixedly installed at one end of the air tube, and a gas cylinder connector is fixedly installed on the side of the adjusting block. A high-pressure gas cylinder is movably installed with the gas cylinder connector. The size of the adjusting block can be adjusted according to the size of the animal to control the airflow, improving the injector's applicability. A medicine tank connector is fixedly installed on the top surface of the injector, and a water pipe is installed on the bottom surface of the medicine tank connector. The air tube and water pipe are connected, facilitating the storage of medicine in the medicine tank for continuous injection. After injection, the solution is used to clean the medicine tank and the injection head using airflow. However, this method of cleaning the medicine tank and injection head with cleaning solution cannot completely prevent cross-contamination caused by improper cleaning procedures.

[0009] Therefore, it is necessary to improve the existing technology to enhance the heat dissipation of the injection device and avoid cross-infection caused by incomplete sterilization. Utility Model Content

[0010] The purpose of this application is to provide a quick-release assembly for the faceplate of an injection handpiece, which partially solves or alleviates the above-mentioned deficiencies in the prior art, enabling simple and efficient disassembly of the handpiece faceplate during the injection process, so as to facilitate the replacement of subsequent consumables and save the operator's disassembly time.

[0011] To solve the aforementioned technical problems, this application adopts the following technical solution:

[0012] This application provides a quick-release assembly for the faceplate of an injection handpiece. The injection handpiece includes a handpiece body, a quick-release assembly, and a faceplate. The handpiece body includes a first cover plate. The quick-release assembly includes a faceplate support, at least one magnetic element, and at least one fixing screw. The magnetic element is disposed on the first cover plate. The faceplate support has at least one locking hole, a locking space, and a first hole. The locking space is used to accommodate the magnetic element. The faceplate has at least one fixing channel inside. The fixing screw passes through the first hole and is inserted into the fixing channel, connecting the faceplate and the faceplate support to the first cover plate via the magnetic element.

[0013] In some embodiments, a first locking position is formed by an inward recess at the edge of the second end of the face shell, and correspondingly, a second locking position is formed by an outward protrusion at the edge of the first cover plate, and the edge of the face shell and the edge of the first cover plate are engaged with each other through the first locking position and the second locking position.

[0014] In other embodiments, a first locking position is formed by an outward protrusion at the edge of the second end of the face shell, and correspondingly, a second locking position is formed by an inward recess at the edge of the first cover plate, and the edge of the face shell and the edge of the first cover plate are engaged with each other through the first locking position and the second locking position.

[0015] In some embodiments, the faceplate includes a first shell and a second shell, wherein the length of the first shell in the axial direction is less than the length of the second shell in the axial direction, such that a first step is formed at the connection between the first shell and the second shell.

[0016] In some embodiments, the magnetic element is a magnet.

[0017] In some embodiments, the first cover plate protrudes outward to form a first convex surface and a second concave surface, such that a second step that cooperates with the first step is formed at the connection between the first convex surface and the second concave surface.

[0018] In some embodiments, the first cover plate has a fixing device extending outward to form a first cavity, the first cavity being used to accommodate a reciprocating push rod, and the fixing device is provided with threads; the injection tool further includes a T-joint and a T-joint quick-release assembly, the T-joint quick-release assembly including a connecting part and a rotating part, the connecting part being provided with threads inside, and the connecting part being threadedly connected to the fixing device.

[0019] In some embodiments, the connecting portion is further provided with at least one mounting hole, the rotating member is provided with a thread, and the rotating member is threadedly connected to the connecting portion through the mounting hole.

[0020] In some embodiments, the connecting part is further provided with a first snap-fit ​​structure, and correspondingly, the second end of the tee head is provided with at least one second snap-fit ​​structure, and the connecting part and the tee head are snapped together by the first snap-fit ​​structure and the second snap-fit ​​structure.

[0021] In some embodiments, the connecting portion includes a first connecting portion and a second connecting portion, wherein the first connecting portion is used to form a second cavity for the second snap-fit ​​structure to rotate, and the second connecting portion is used to be sleeved on the fixing device.

[0022] In some embodiments, a clamping plate is provided inside the face shell, and the rotating member is close to the first cover plate. Correspondingly, a first space is formed by the inward recess of the inner side of the face shell support, and a second space is formed by the inward recess of the clamping plate. Both the first space and the second space are used to accommodate the rotating member.

[0023] In some embodiments, the inner diameter of the connecting portion is greater than or equal to the outer diameter of the fixing device.

[0024] Beneficial technical effects:

[0025] For scenarios requiring continuous injection of different medications, this application designs a quick-release assembly for the injection handpiece's faceplate to reduce the time operators spend changing consumables. On one hand, the quick-release assembly ensures a stable connection between the faceplate and the handpiece during frequent, strong vibrations through a locking design and magnetic attraction. On the other hand, it allows for easy removal of the faceplate with simple external force, facilitating subsequent consumable replacements and shortening the operator's disassembly time.

[0026] Furthermore, to facilitate consumable replacement after the faceplate is disassembled, this application also designs a quick-release assembly for the three-way connector of the injection handpiece, which avoids cross-contamination of the medication. This quick-release assembly ensures that the three-way connector is securely connected to the handpiece body via the connecting part and rotating component during frequent and strong vibrations. It also makes replacement easier during use, saving operator workload, improving work efficiency, and ensuring a tight seal during disassembly. When the three-way connector is damaged, it can be easily disassembled and replaced separately without discarding the entire injection handpiece, saving costs.

[0027] Correspondingly, this application also provides an injection handpiece with a restricted heat dissipation mode featuring a three-part optimized space. This restricted heat dissipation mode enables tiered heat dissipation within the injection handpiece. To meet the requirement of enhancing motor heat dissipation without increasing the size of the injection handpiece and ensuring stable operation during repeated use, this application places a small-volume fan between the motor and the electronic control device, achieving primary heat dissipation for the motor. On one hand, when the fan is not running, the heat generated by the motor during continuous use is quickly transferred from the first heat dissipation space to the second heat dissipation space under the guidance of the airflow entering from the first ventilation zone, preventing heat accumulation around the motor and slowing down the motor's temperature rise. On the other hand, when the fan is running, the heat accumulated in the second heat dissipation space is rapidly transferred by the airflow to the third heat dissipation space and then discharged from the third ventilation zone, making the heat dissipation efficiency for the motor higher than that for the electronic control device.

[0028] Furthermore, this application also provides a temperature control component (i.e., a temperature sensing module and a control unit) that performs intelligent gradient adjustment based on temperature changes within a specific area of ​​the second heat dissipation space. Specifically, this application proposes a restrictive fan cooling mechanism based on this three-part optimized space. By indirectly detecting the temperature of the second heat dissipation space, it can avoid the risk of fan over-regulation to a certain extent (by restricting fan start-up control). At the same time, through the synergistic cooperation of graded adjustment and dual detection, it can ensure relatively reliable adjustment efficiency under the control of restricted fan start-up. In other words, this application can limit the fan in terms of both space volume and rotational power consumption, so that heat is effectively dissipated while minimizing the impact of the fan on the motor and electronic control device (the impact of fan vibration is relatively limited), and without excessively increasing the size of the injection tool, thus avoiding inconvenience for the actual use by the staff.

[0029] Specifically, the temperature control component incorporates a fault-tolerant design, enabling simultaneous detection and recording of both temperature change trends and real-time temperature. This avoids fan over-adjustment and reduces the performance requirements of the temperature sensing module (or temperature sensor). When the temperature change trend decreases within a specific time period, the trend is considered under control, and the fan continues to operate at the current speed. If the temperature sensing module is overly sensitive, it will immediately issue a corresponding control signal to adjust the fan if it detects abnormal data within that specific time period (the abnormal data could be greater than or equal to the set fourth temperature, or less than the set second temperature). The intelligent gradient adjustment temperature control component of this application is designed with a judgment criterion: when abnormal data occurs, a corresponding control signal will only be issued if the amount of abnormal data is greater than or equal to the set abnormal amount. This makes the fan's operation more flexible and also reduces the sensitivity requirements of the temperature sensing module.

[0030] The injection handpiece of this application enables intermittent operation of the fan, avoiding excessive fan control and mechanical wear and noise caused by long-term fan operation, as well as preventing the heat generated by long-term fan operation from affecting the motor and electronic control device. The intermittent operation design of the fan also results in less power consumption, saving energy costs, and reducing fan maintenance costs and workload. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. The elements or parts in the drawings are not necessarily drawn to scale. Obviously, the drawings described below are some embodiments of this application; for those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0032] Figure 1 This is a schematic diagram of a first partial structure of the injection handpiece in one embodiment of this application;

[0033] Figure 2 This is a three-dimensional schematic diagram of a partial structure of the injection handpiece in one embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the second partial structure of the injection handpiece in one embodiment of this application;

[0035] Figure 4 This is a schematic diagram of the third partial structure of the injection handpiece in one embodiment of this application;

[0036] Figure 5 This is a schematic diagram of the longitudinal section structure of the injection handpiece in one embodiment of this application;

[0037] Figure 6 This is a schematic diagram of the first structure of the quick-release shell assembly in one embodiment of this application;

[0038] Figure 7 This is a schematic diagram of the second structure of the quick-release shell assembly in one embodiment of this application;

[0039] Figure 8 This is a schematic diagram of the first structure of the faceplate in one embodiment of this application;

[0040] Figure 9 This is a schematic diagram of the second structure of the faceplate in one embodiment of this application;

[0041] Figure 10 This is a schematic diagram of the third structure of the faceplate in one embodiment of this application;

[0042] Figure 11 This is a schematic diagram of the first structure of the three-way quick-release assembly in one embodiment of this application;

[0043] Figure 12 This is a schematic diagram of the second structure of the three-way quick-release assembly in one embodiment of this application;

[0044] Figure 13This is a schematic diagram of the third structure of the three-way quick-release assembly in one embodiment of this application.

[0045] Summary of reference numerals in the attached drawings: 1. Housing; 10. Faceplate; 101. First housing; 102. Second housing; 103. Clamping plate; 104. Fixing channel; 105. First step; 14. Handpiece body; 21. First cover plate; 211. Second step; 13. Rear end cover; 2. Motor; 231. Second protrusion; 3. Fan; 31. First protrusion; 311. Wire mounting port; 32. Shock absorber; 4. Electrical control device; 41. Control module; 5. Connecting part; 51. Accommodating space; 52. Mounting hole; 53. Third fixing plate; 6. Rotating part; 7. T-joint; 71. Liquid inlet; 72. Liquid outlet; 73. Second end of the t-joint; 731. Second snap-fit ​​structure; 8. Fixing device; 11. Faceplate bracket; 111. Locking hole; 12. Magnetic element. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0047] In this document, suffixes such as “module,” “part,” or “unit” used to denote elements are used only for illustrative purposes and have no specific meaning in themselves. Therefore, “module,” “part,” or “unit” may be used interchangeably.

[0048] In this document, the terms "upper," "lower," "inner," "outer," "front," "rear," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0049] In this document, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0050] In this document, "and / or" includes any and all combinations of one or more of the listed related items.

[0051] In this article, "multiple" means two or more, that is, it includes two, three, four, five, etc.

[0052] As used in this specification, the term "about" typically means + / -5% of the value, more typically + / -4% of the value, more typically + / -3% of the value, more typically + / -2% of the value, even more typically + / -1% of the value, and even more typically + / -0.5% of the value.

[0053] In this specification, certain embodiments may be disclosed in a range-bound format. It should be understood that this "range-bound" description is merely for convenience and brevity and should not be construed as a rigid limitation on the disclosed range. Therefore, the description of a range should be considered as having specifically disclosed all possible subranges and the individual numerical values ​​within those ranges. For example, a description of the range 1-6 should be considered as having specifically disclosed subranges such as from 1 to 3, from 1 to 4, from 1 to 5, from 2 to 4, from 2 to 6, from 3 to 6, etc., and the individual numbers within those ranges, such as 1, 2, 3, 4, 5, and 6. This rule applies regardless of the breadth of the range.

[0054] Definition of noun:

[0055] Radial height: In this document, radial height refers to the height in a direction perpendicular or approximately perpendicular to the axial direction of the injection handpiece.

[0056] See Figures 1-5 As shown, this application provides an injection handpiece that is lightweight and compact, and has good heat dissipation efficiency for the motor, ensuring that the motor can operate at a high efficiency for a long time.

[0057] See Figures 6-10 As shown, this application provides a quick-release assembly for the three-way connector of an injection handpiece. This quick-release assembly can ensure that the three-way connector is firmly connected during continuous use of the injection handpiece, thus achieving the working stability of the injection handpiece, and can also make it quick to disassemble, reducing time and personnel costs, and effectively preventing cross-contamination of the medication.

[0058] See Figures 11-13 As shown, this application also provides a quick-release assembly for the faceplate of an injection tool. This quick-release assembly not only ensures the working stability of the faceplate under frequent and strong vibrations, but also incorporates a foolproof design, and makes disassembly simpler and more efficient, facilitating the replacement of internal consumables and auxiliary materials.

[0059] Example 1

[0060] This application provides an injection handpiece, which includes: a housing 1, the housing including: a handpiece body 14, the two ends of the handpiece body being respectively provided with a front end cover and a rear end cover 13; an injection module, a motor 2, a fan 3 and an electronic control device 4 are arranged sequentially along the axial direction between the front end cover and the rear end cover, the electronic control device 4 including a temperature sensing module 41 and a control unit.

[0061] Wherein, a first heat dissipation space I is formed between the outer casing of the motor and the inner surface of the housing; a certain space is reserved between the end of the motor and the first side of the fan to form a second heat dissipation space II; and a third heat dissipation space III is formed between the second side of the fan and the rear end cover.

[0062] When the motor starts, it generates heat, which is transferred from the first heat dissipation space I to the second heat dissipation space II and accumulates there. When the temperature sensing module detects that the accumulated heat in the second heat dissipation space II causes the temperature to reach a set value, the fan automatically turns on.

[0063] The front cover has a first ventilation area with a first ventilation area, the first heat dissipation space has a second ventilation area with a second ventilation area at the end of the motor, and the rear cover has a third ventilation area with a third ventilation area. When the fan starts, a negative pressure is formed in the third heat dissipation space. Under the action of the negative pressure, the airflow enters the first heat dissipation space from the first ventilation area at a first flow rate, so that the heat generated by the motor during operation is transferred to the second heat dissipation space through the second ventilation area at a second flow rate under the guidance of the airflow. Then, the airflow is discharged through the third ventilation area at a third flow rate.

[0064] At least one first protrusion 31 is provided on the inner surface of the housing corresponding to the fan 3 in the axial direction to facilitate fixing the fan, and a shock absorber 32 is installed between adjacent first protrusions.

[0065] In some embodiments, the length L1 of the second heat dissipation space along the axial direction of the housing is 10-30 mm.

[0066] In some embodiments, the distance L2 between the second side of the fan and the first end of the electronic control device is 10-20 mm, which is beneficial for timely detection of the temperature of the second heat dissipation space.

[0067] Furthermore, in some embodiments, the length L1 is 20-30 mm.

[0068] As a preferred embodiment, in some embodiments, the length L1 is 25 mm and the distance L2 is 15 mm.

[0069] In some embodiments, the length of the second heat dissipation space along the axial direction of the housing is also the distance between the end of the motor and the first side of the fan.

[0070] In some embodiments, the shock absorber is a shock-absorbing rubber, and two or more shock-absorbing rubber pieces can be provided to reduce the noise caused by motor vibration during repeated use of the injection tool, while also fixing the fan together with the first protrusion.

[0071] In some embodiments, multiple sets of wires are provided between the motor 2 and the electronic control device 4, and the first protrusion is provided with a wire mounting port 311 for guiding the wires.

[0072] Furthermore, in some implementations, the number of wire mounting ports can be set to two or three.

[0073] In some embodiments, at least one second protrusion 231 is provided on the inner surface of the housing between the motor 2 and the fan 3, and the inner surfaces of adjacent second protrusions together form a wire mounting groove so that the wire passes through the first protrusion in sequence along the wire mounting groove and the wire mounting opening.

[0074] This application allows for graded temperature adjustment of the second heat dissipation space, as detailed below.

[0075] In some embodiments, the temperature sensing module 41 includes a first temperature detection module, which is configured to detect a first detection temperature of the second heat dissipation space at a first moment; when the first detection temperature is detected to be greater than a set first temperature, a first control signal is generated accordingly; the control unit receives the first control signal to control the fan to automatically turn on at a first speed.

[0076] In other embodiments, the temperature sensing module 41 further includes a second temperature detection module, which is configured to detect a second detection temperature of the second heat dissipation space at a second time; when the second detection temperature exceeds a set threshold, a second control signal is generated accordingly, and the control unit receives the second control signal to control the injection handpiece to be forcibly shut down.

[0077] In other embodiments, when the second temperature detection module detects that the second detected temperature is less than the set second temperature, it generates a third control signal, and the control unit receives the third control signal to control the fan to stop working.

[0078] In another embodiment, the temperature sensing module 41 further includes a third temperature detection module, which is used to continuously detect the temperature rise trend; when the temperature rise trend is not decreased, a fourth control signal is generated accordingly; the control unit receives the fourth control signal to control the fan to operate at a secondary speed; wherein the secondary speed is greater than the primary speed.

[0079] In other embodiments, the third temperature detection module can also be used to detect a third temperature of the second heat dissipation space at a third moment; when the third temperature exceeds a set third temperature, a fifth control signal is generated accordingly, and the control unit receives the fifth control signal to control the fan to operate at a second-level speed. In some embodiments, the third temperature is greater than the first temperature.

[0080] For example, in some embodiments, the third temperature detection module is used to detect the temperature change trend during a first time period after the fan starts according to the corresponding control signal. For example, after the fan starts at a first-level speed, it continues to monitor multiple fourth detection temperatures of the second heat dissipation space II within a set first time period, and determines the temperature change trend in at least two sub-time periods within the first time period based on the multiple fourth detection temperatures: when the temperature change trend gradually decreases over time, the fan can maintain its current speed; or, a first control signal can be generated, and the control unit receives the corresponding control signal to control the fan to continue operating at a first-level speed; when the temperature change trend increases or remains constant over time, a corresponding fourth control signal can be generated, and the control unit receives the fourth control signal to control the fan to start operating at a second-level speed.

[0081] For example, in some embodiments, the temperature change trend within a sub-period can be the average rate of temperature change within that period. In some embodiments, at least two temperature change trends collected within a first period can be two temperature change trends at the beginning and end of the first period, or multiple temperature change trends can be multiple temperature change trends collected at intervals within multiple sub-periods of the first period. When the overall temperature change trend value within that period is decreasing, the temperature change trend is considered to be under control, and the fan can continue to operate at the current speed.

[0082] In some embodiments, the temperature change trend refers to the rate of temperature change per unit time.

[0083] In some embodiments, the temperature sensing module 41 further includes a fourth temperature detection module, which is used to: record abnormal data when the temperature detected during the first time period (for example, it may be other temperature data measured outside multiple sub-time periods within the time period by the temperature detection module, or it may be part of multiple fourth detection temperatures) exceeds a set fourth temperature or is less than the second temperature; when the amount of abnormal data within a set time (such as the first time period) is less than a set abnormal amount, the fan is allowed to continue operating at a second-level speed; when the amount of abnormal data within a set time is greater than or equal to the set abnormal amount, a corresponding sixth control signal is generated, and the control unit receives and sends the sixth control signal to suggest that the fan or injection handpiece stop working.

[0084] Preferably, in some embodiments, the temperature detection module can perform simultaneous dual detection and recording of temperature change trends and values. For example, if the temperature change trend gradually decreases within a unit of time (e.g., a first time period), but there are abnormal data values ​​greater than a fourth temperature, the fan will not immediately increase its speed; or, if there are abnormal data values ​​less than a second temperature, the fan will not immediately stop working. In the design of this application, it first determines whether the frequency of abnormal data occurrences is too high. Only when the amount of abnormal data is greater than or equal to a set abnormal amount will the control unit send a corresponding control signal.

[0085] This application employs an intelligent gradient adjustment design for temperature changes in the second heat dissipation space. On one hand, it avoids high-intensity fan operation caused by accidental (or erroneous) abnormal data, reducing the interference of vibration generated by high-intensity fan operation on the motor and electronic control device, and also reducing mechanical wear of the fan, thus extending its service life. On the other hand, it also avoids overheating of the motor caused by the fan stopping due to accidental (or erroneous) abnormal data, achieving effective heat dissipation for the motor. This dual detection is similar to a fault-tolerant design of a temperature detection module, enabling more rational use of the fan and reducing the performance requirements of the fan and temperature sensing module (or temperature sensor).

[0086] In some implementations, when the first temperature detection module detects that the temperature in the second heat dissipation space is greater than 80°C, it generates a first control signal. The control unit receives the first control signal and sends an on signal to the fan. At this time, the fan starts working at a first-level speed to quickly transfer heat away from the motor. When the second temperature detection module detects that the temperature in the second heat dissipation space is less than 70°C, it generates a third control signal. The control unit receives the third control signal and sends an off signal to the fan. At this time, the fan stops working, and the motor continues to operate normally.

[0087] In some embodiments, a temperature sensing module (or temperature sensor) is used to collect temperature data in real time or periodically.

[0088] In some embodiments, the temperature detected by the temperature sensing module may be the overall average temperature of the second heat dissipation space, or the temperature at a certain location within the second heat dissipation space, or the average of the temperatures at multiple locations.

[0089] In some embodiments, the first ventilation area is larger than the second ventilation area, so that the airflow can guide the heat to flow quickly from the first heat dissipation space to the second ventilation area; the second flow velocity is greater than the first flow velocity.

[0090] In other embodiments, the third ventilation area is also larger than the second ventilation area, so that the heat can be quickly discharged from the third ventilation area.

[0091] In some embodiments, the front end cap is the faceplate of the injection tool.

[0092] In some embodiments, the injection handpiece shell is made of plastic.

[0093] In some embodiments, the first ventilation zone is provided with a plurality of vents, and the third ventilation zone is provided with a plurality of heat dissipation vents, so that airflow enters the first heat dissipation space through the vents and guides the heat to be discharged from the heat dissipation vents through the second heat dissipation space and the third heat dissipation space.

[0094] In some embodiments, the fan is an axial fan, a centrifugal fan, or a mixed-flow fan.

[0095] As a preferred embodiment, in some embodiments, the fan is an axial fan, and the fan housing is circular in shape to better fit the hand tool housing.

[0096] Furthermore, in order to verify that the motor in the injection handpiece of this application can work normally, the temperature of the motor and the handpiece housing was tested at different distances, and the results are shown in Table 1 below.

[0097] Table 1

[0098]

[0099] The results show that setting the length L1 of the second heat dissipation space (i.e., the distance L1 between the motor and the fan) within the range of 20-30 mm allows for efficient heat dissipation of the motor under the action of the fan. The motor temperature is around 80℃, at which point the motor operates at a high efficiency, and the injection handpiece temperature is also low, preventing burns to the operator's skin and facilitating operation. These results also indicate that, based on the three-part design of this application, setting the length of the second heat dissipation space within a smaller range (e.g., 20-30 mm) achieves good heat dissipation for the motor. This demonstrates that even with the addition of a fan, the volume of the injection handpiece does not significantly increase, and the overall volume of the injection handpiece remains relatively small.

[0100] In some embodiments, the injection module includes an infusion device and a nozzle, as well as a push rod capable of reciprocating along the cavity of the nozzle, wherein the infusion device is a medical injection syringe.

[0101] In some embodiments, the injection handpiece further includes a start switch, which is disposed on the outer surface of the housing corresponding to the electronic control device and connected to the electronic control device.

[0102] In some embodiments, the first protrusion 31 includes a first fixing plate and a second fixing plate disposed along the axial direction of the housing, and the radial height of the first fixing plate is greater than the radial height of the second fixing plate.

[0103] Furthermore, in some embodiments, a first fixing plate is provided at both ends of the fan to facilitate fixing the fan inside the handpiece housing.

[0104] This application proposes an injection handpiece with a restricted heat dissipation mode featuring a three-part optimized space. In this injection handpiece, the fan is located between the motor and the electronic control device, and the optimal distance between the fan and the motor is 20-30 mm. The distributed arrangement of the motor, fan, and electronic control device ensures that the heat generated by the motor during continuous use is preferentially dissipated by the fan, guaranteeing the motor's efficiency. It also keeps the electronic control device away from heat sources, enabling efficient data transmission, and makes the position design of the start switch connected to the electronic control device more ergonomic.

[0105] Furthermore, the three-part design creates multiple heat dissipation zones inside the injection handpiece. Specifically, a first heat dissipation space is formed between the motor housing and the inner surface of the housing; a second heat dissipation space is reserved between the end of the motor and the first side of the fan; and a third heat dissipation space is formed between the second side of the fan and the rear end cover of the injection handpiece. During continuous use, the heat generated by the motor is transferred from the first heat dissipation space to the second heat dissipation space by airflow, ensuring normal operation of the motor in the early stages of use and extending its service life. When the heat accumulated in the second heat dissipation space reaches a set temperature, the fan automatically turns on, accelerating heat dissipation. Under the action of the fan, the temperature in the second heat dissipation space drops rapidly, prioritizing heat dissipation for the motor. The accumulated heat is quickly transferred to the third heat dissipation space and then discharged through the heat dissipation vents on the rear end cover.

[0106] This zoned, multi-zone coordinated heat dissipation method enables the injection handpiece of this application to achieve high heat dissipation efficiency for the motor. Furthermore, during continuous use, the motor generates significant vibration. The vibration damping components around the fan in this application not only reduce noise generated by continuous motor operation but also, together with the first protrusion, ensure the fan's operational stability under frequent, strong vibrations, ensuring continuous heat dissipation. In application scenarios with long injection cycles and requiring multiple consecutive injections, the injection handpiece of this application not only improves heat dissipation efficiency and accelerates the heat dissipation speed but also ensures the operational stability of the injection handpiece during use.

[0107] At the same time, this zoned and graded heat dissipation mode can also reduce the impact of motor and fan operation on electronic control devices.

[0108] When there are strict requirements for the injection position, the corresponding structure related to the three-part optimized space and the restricted fan heat dissipation mechanism of this application maintains the working stability of the injection handpiece under the strong vibration generated by the motor and fan, thereby ensuring its injection accuracy, ensuring the safety and accuracy of the injection, and also reducing noise to a certain extent.

[0109] The three-part optimized space design of this application achieves priority heat dissipation for the motor without significantly increasing the size of the injection handpiece, allowing the motor to operate at a high efficiency. The fan used in this application is small in size, making the overall weight of the injection handpiece lighter. At the same time, the design of the temperature sensing module and control unit allows the fan to automatically turn on and off, avoiding continuous operation. The intermittent operation of the fan reduces the adverse effects of long-term operation.

[0110] Example 2

[0111] This application also provides a quick-release assembly for a three-way connector of an injection handpiece. The injection handpiece includes a handpiece body 14, a quick-release assembly for a three-way connector, and a three-way connector 7. The handpiece body 14 includes a first cover plate 21, and a fixing device 8 extending outward from the first cover plate to form a first cavity. The first cavity is used to accommodate a push rod capable of reciprocating motion. The fixing device 8 is provided with threads. The quick-release assembly for a three-way connector includes a connecting part 5 and a rotating part 6.

[0112] The connecting part 5 has internal threads and is threadedly connected to the fixing device 8. The connecting part 5 also has at least one mounting hole 52. The rotating part 6 has threads and is threadedly connected to the connecting part 5 through the mounting hole 52. The first end of the connecting part is recessed inward to form at least one accommodating space 51. The connecting part also has a first snap-fit ​​structure. Correspondingly, the second end 73 of the tee head has at least one second snap-fit ​​structure 731 corresponding to the first snap-fit ​​structure. The connecting part 5 and the tee head 7 are snapped together by the first snap-fit ​​structure and the second snap-fit ​​structure.

[0113] When a force in the first direction is applied to the connecting part 5 to screw it into the fixing device 8, a gap remains between the connecting part 5 and the fixing device 8, at which point the connecting part 5 and the fixing device 8 are initially connected. When the tee head 7 enters the accommodating space 51 from the first angle, the second snap-fit ​​structure 731 extends into the accommodating space 51 accordingly. When the tee head is rotated to the second angle, the second snap-fit ​​structure is misaligned with the accommodating space, and the second snap-fit ​​structure and the first snap-fit ​​structure snap into each other, at which point the connecting part 5 and the tee head 7 are initially connected. When a force in the second direction is applied to the rotating member 6 to screw it into the connecting part 5, the gap between the connecting part 5 and the fixing device 8 is reduced, at which point the tee head 7 is tightly connected to the fixing device 8 through the connecting part 5.

[0114] In some embodiments, the connecting part is a quick-release nut, and the rotating part is a set screw.

[0115] In some embodiments, the accommodating space 51 may be a completely inwardly recessed notch formed by the first end of the connecting portion, such as... Figure 12 As shown.

[0116] In other embodiments, the accommodating space may be a groove formed by the inward recess of the first end portion of the connecting part, as long as it can accommodate the second snap-fit ​​structure.

[0117] In some embodiments, the two ends of the handpiece body are respectively provided with a front end cover and a rear end cover 13, and an injection module is provided between the front end cover and the rear end cover. The injection module includes an infusion device and a nozzle. The three-way connector 7 also includes an inlet end 71 and an outlet end 72. The inlet end is connected to the infusion device through a conduit, and the outlet end is connected to the nozzle.

[0118] In some embodiments, the connecting part 5 is sleeved on the fixing device 8; in other words, the inner diameter of the connecting part 5 is greater than or equal to the outer diameter of the fixing device 8.

[0119] In some embodiments, a third fixing plate 53 extends from the edge of the first end of the connecting portion toward the center, and the connection between the third fixing plate 53 and the edge of the first end of the connecting portion forms a slot.

[0120] In some embodiments, the first snap-fit ​​structure is a slot, and the second snap-fit ​​structure is a buckle formed by an outward protrusion on the second end of a tee.

[0121] In other embodiments, the connecting portion includes a first connecting portion and a second connecting portion, the first connecting portion being used to form a second cavity for the second snap-fit ​​structure 731 to rotate, and the second connecting portion being used to be fitted onto the fixing device.

[0122] In some embodiments, the second connecting portion refers to the area containing the internal thread of the connecting portion, and the first connecting portion refers to the area protruding from the connecting portion after it is sleeved on the fixing device, or it may be the area that does not contain the internal thread of the connecting portion.

[0123] In some embodiments, a motor 2, a fan 3, and an electronic control device 4 are sequentially arranged between the front end cover and the rear end cover along the axial direction.

[0124] In some embodiments, the distance L1 between the end of the motor and the first side of the fan is 10-30 mm.

[0125] Furthermore, in some embodiments, the distance L1 is 20-30 mm.

[0126] In some embodiments, the distance L2 between the second side of the fan and the first end of the electronic control device is 10-20 mm.

[0127] As a preferred embodiment, in some embodiments, the distance L1 is 25 mm and the distance L2 is 15 mm.

[0128] In some embodiments, the electronic control device 4 includes a temperature sensing module 41 and a control unit. The temperature sensing module 41 includes a first temperature detection module, which is configured to detect a first detection temperature at a first moment. When the first detection temperature is detected to be greater than a set first temperature, a first control signal is generated accordingly. The control unit receives the first control signal to control the fan to automatically start at a first-level speed.

[0129] In other embodiments, the temperature sensing module 41 further includes a second temperature detection module, which is configured to detect a second detection temperature at a second time; when the second detection temperature exceeds a set threshold, a second control signal is generated accordingly, and the control unit receives the second control signal to control the injection handpiece to be forcibly shut down.

[0130] In other embodiments, when the second temperature detection module detects that the second detected temperature is less than the set second temperature, it generates a third control signal, and the control unit receives the third control signal to control the fan to stop working.

[0131] In other embodiments, the handpiece body further includes a start switch, which is disposed on the outer surface of the housing corresponding to the electronic control device and connected to the electronic control device.

[0132] This application provides a quick-release assembly for a securely connected three-way connector. Firstly, the three-way connector can be securely connected to the injection handpiece using this quick-release assembly. This secure connection means that during repeated injections, the motor of the injection handpiece will generate significant vibration. In this case, the three-way connector is repositioned on the injection handpiece via a rotating component, reducing the impact of motor vibration and ensuring the operational stability of the injection handpiece. Furthermore, the multiple locking design on the three-way connector ensures a secure connection with the injection handpiece during use. Secondly, the three-way connector can be quickly disassembled using this quick-release assembly. In the prior art, traditional three-way connectors require specialized tools and professional personnel for replacement, a cumbersome and complex process. This application's quick-release assembly allows for rapid disassembly by loosening the rotating component and appropriately rotating the three-way connector until its second locking structure overlaps with the receiving space on the connecting part. Furthermore, when disassembling the three-way connector, the one-way valve inside the three-way connector prevents the medication from flowing into the three-way connector when the infusion device containing the medication is inserted into the tubing. In summary, the quick-release assembly for the three-way connector of this application not only facilitates the rapid disassembly of the three-way connector by ordinary operators, but also reduces the time and personnel costs of replacing the three-way connector, ensures the sealing during disassembly, and avoids cross-contamination of the medicine solution compared to the repeated cleaning of the prior art when replacing the three-way connector.

[0133] Example 3

[0134] This application also provides a quick-release assembly for the faceplate of an injection handpiece. The injection handpiece includes a handpiece body 14, a quick-release assembly, and a faceplate 10. The handpiece body includes a first cover plate 21. The quick-release assembly includes a faceplate support 11, at least one magnetic element 12, and at least one fixing screw. The magnetic element is disposed on the first cover plate 21. The faceplate support 11 has at least one locking hole 111, which has a locking space and a first hole. The locking space is used to accommodate the magnetic element. The faceplate 10 has at least one fixing channel 104 inside. The fixing screw passes through the first hole and is inserted into the fixing channel 104, connecting the faceplate 10 and the faceplate support 11 to the first cover plate 21 via the magnetic element 12.

[0135] In some embodiments, a first locking position is formed by an inward recess at the edge of the second end of the faceplate, and correspondingly, a second locking position is formed by an outward protrusion at the edge of the first cover plate 21, wherein the edge of the faceplate and the edge of the first cover plate are engaged with each other through the first locking position and the second locking position; or, a first locking position is formed by an outward protrusion at the edge of the second end of the faceplate, and correspondingly, a second locking position is formed by an inward recess at the edge of the first cover plate, wherein the edge of the faceplate and the edge of the first cover plate are engaged with each other through the first locking position and the second locking position.

[0136] In some embodiments, the faceplate 10 includes a first shell 101 and a second shell 102, wherein the length of the first shell in the axial direction is less than the length of the second shell in the axial direction, such that a first step 105 is formed at the connection between the first shell and the second shell.

[0137] In some embodiments, the magnetic element is a magnet.

[0138] In some embodiments, the first cover plate 21 protrudes outward to form a first convex surface and a second concave surface, such that a second step 211 is formed at the connection between the first convex surface and the second concave surface to cooperate with the first step 105.

[0139] In other embodiments, the first cover plate 21 may also be recessed inward to form a first convex surface and a second concave surface.

[0140] In some embodiments, a fixing device 8 extends outwardly on the first cover plate 21 to form a first cavity, the first cavity being used to accommodate a reciprocating push rod, and the fixing device 8 being provided with threads; the injection tool also includes a three-way connector 7 and a three-way connector quick-release assembly, the three-way connector quick-release assembly including a connecting part 5 and a rotating part 6, the connecting part 5 being provided with threads inside, and the connecting part 5 being threadedly connected to the fixing device 8.

[0141] In some embodiments, the connecting part 5 is further provided with at least one mounting hole 52, the rotating member 6 is provided with threads, and the rotating member 6 is threadedly connected to the connecting part 5 through the mounting hole 52.

[0142] In some embodiments, the connecting part is further provided with a first snap-fit ​​structure. Correspondingly, at least one second snap-fit ​​structure 731 is formed on the second end of the tee head. The connecting part 5 and the tee head 7 are snapped together by the first snap-fit ​​structure and the second snap-fit ​​structure.

[0143] In some embodiments, the connecting portion includes a first connecting portion and a second connecting portion, wherein the first connecting portion is used to form a second cavity for the second snap-fit ​​structure 731 to rotate, and the second connecting portion is used to be sleeved on the fixing device.

[0144] In some embodiments, a clamping plate 103 is provided inside the face shell, and the rotating member 6 is close to the first cover plate 21. Correspondingly, a first space is formed by the inward recess of the inner side of the face shell support, and a second space is formed by the inward recess of the clamping plate 103. Both the first space and the second space are used to accommodate the rotating member.

[0145] In other embodiments, the connecting portion 5 is sleeved on the fixing device 8, that is, the inner diameter of the connecting portion 5 is greater than or equal to the outer diameter of the fixing device 8.

[0146] This application designs a securely connected quick-release assembly for the faceplate. On one hand, the faceplate can be stably connected to the injection handpiece using this quick-release assembly. Specifically, during continuous use of the injection handpiece, the motor generates significant vibrations. Even then, the faceplate remains stably connected to the front end of the injection handpiece through the multi-positioning design of the quick-release assembly, preventing it from easily falling off. The multi-positioning design specifically refers to the positioning of the faceplate support and magnet, the faceplate support and faceplate, and the faceplate and handpiece. This multi-positioning design improves the working stability of the faceplate under frequent and strong vibrations and ensures the stability of the faceplate after disassembly and reassembly, preventing misalignment. On the other hand, the faceplate can also be easily disassembled using this quick-release assembly. Specifically, because the faceplate in this design is magnetically connected to the handpiece through the quick-release assembly, it can be disassembled when the applied external force exceeds the magnetic force. This quick-release assembly only requires a simple application of external force to complete the faceplate disassembly process, facilitating subsequent replacement of internal consumables and auxiliary materials.

[0147] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0148] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions to cause a computer terminal (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of this application.

[0149] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims. All of these forms are within the protection scope of this application.

Claims

1. A faceplate quick release assembly for an injection hand tool, comprising: The injection hand tool comprises a hand tool body (14), a face shell quick release assembly and a face shell (10), the hand tool body comprises a first cover plate (21); wherein the face shell quick release assembly comprises a face shell support (11), at least one magnetic element (12) and at least one fixing screw; the magnetic element is arranged on the first cover plate (21), the face shell support (11) is provided with at least one clamping hole (111), the clamping hole is provided with a clamping space and a first hole, the clamping space is used for accommodating the magnetic element, the inside of the face shell (10) is provided with at least one fixing channel (104), the fixing screw passes through the first hole and is inserted into the fixing channel (104), the face shell (10) and the face shell support (11) are connected with the first cover plate (21) through the magnetic element (12).

2. The faceplate quick release assembly of claim 1, wherein, The edge of the second end of the face shell is inwardly recessed to form a first clamping position, and correspondingly, the edge of the first cover plate (21) is outwardly protruded to form a second clamping position, and the edge of the face shell and the edge of the first cover plate are clamped with each other through the first clamping position and the second clamping position; or the edge of the second end of the face shell is outwardly protruded to form a first clamping position, and correspondingly, the edge of the first cover plate is inwardly recessed to form a second clamping position, and the edge of the face shell and the edge of the first cover plate are clamped with each other through the first clamping position and the second clamping position.

3. The faceplate quick release assembly of claim 1, wherein, The face shell (10) comprises a first shell (101) and a second shell (102), the length of the first shell in the axial direction is less than the length of the second shell in the axial direction, so that a first step (105) is formed at the connection of the first shell and the second shell; and / or the magnetic element is a magnet.

4. The faceplate quick release assembly of claim 3, wherein, The first cover plate (21) is outwardly protruded to form a first convex surface and a second concave surface, so that a second step (211) matched with the first step (105) is formed at the connection of the first convex surface and the second concave surface.

5. The faceplate quick release assembly of claim 1, wherein, The first cover plate (21) is outwardly extended to form a fixing device (8) with a first cavity, the first cavity is used for accommodating a reciprocating push rod, and the fixing device (8) is provided with a thread; the injection hand tool further comprises a three-way head (7) and a three-way head quick release assembly, the three-way head quick release assembly comprises a connecting part (5) and a rotating part (6), the inside of the connecting part (5) is provided with a thread, and the connecting part (5) is threadedly connected with the fixing device (8).

6. The faceplate quick release assembly of claim 5, wherein, The connecting part (5) is further provided with at least one mounting hole (52), the rotating part (6) is provided with a thread, and the rotating part (6) is threadedly connected with the connecting part (5) through the mounting hole (52).

7. The faceplate quick release assembly of claim 5, wherein, The inside of the connecting part is further provided with a first clamping structure, and correspondingly, the second end of the three-way head is provided with at least one second clamping structure (731), and the connecting part (5) and the three-way head (7) are clamped with each other through the first clamping structure and the second clamping structure.

8. The faceplate quick release assembly of claim 7, wherein, The connecting part comprises a first connecting part for forming a second cavity for the second clamping structure (731) to rotate, and a second connecting part for sleeving on the fixing device.

9. The faceplate quick release assembly of claim 5, wherein, The face shell is internally provided with a clamping plate (103), the rotating member (6) is close to the first cover plate (21), correspondingly, the inner side of the face shell support is inwardly recessed to form a first space, the clamping plate (103) is inwardly recessed to form a second space, and the first space and the second space are both used for accommodating the rotating member.

10. The faceplate quick release assembly of claim 5, wherein, The inner diameter of the connecting part (5) is greater than or equal to the outer diameter of the fixing device (8).

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