Three-way head quick release assembly of injection hand tool

Abstract

The invention relates to the field of medical equipment, in particular to a tee joint quick release assembly of an injection hand tool. The injection hand tool comprises a hand tool body, a three-way head quick release assembly and a three-way head, the hand tool body comprises a fixing device, threads are arranged on the fixing device, and the three-way head quick release assembly comprises a connecting part and a rotating part; a thread is arranged in the connecting part, the connecting part is in threaded connection with the fixing device, and a mounting hole is further formed in the connecting part; a thread is arranged on the rotating piece, and the rotating piece is in threaded connection with the connecting part; a first clamping structure is arranged at the first end of the connecting part, correspondingly, a second clamping structure is arranged at the second end of the tee joint, and the connecting part and the tee joint are mutually clamped through the first clamping structure and the second clamping structure. The three-way head can be conveniently and rapidly detached and replaced, the working efficiency of operators is improved, and cross infection of liquid medicine in multiple injection processes is avoided.

Description

Technical Field

[0001] The invention relates to the field of medical equipment, and in particular to a three-way quick-release assembly of an injection handpiece. Background Art

[0002] Needle-free injection is an injection method without a traditional needle tube. It diffuses the liquid medicine into the user's subcutaneous tissue through pressure. Since this injection method is painless and does not cause fear in users, it is becoming more and more popular. Needle-free syringes have also begun to be widely used in the field of skin beauty. In order to enable needle-free syringes to inject drugs at high frequency, the existing technology has improved the power structure of needle-free syringes, such as using electromagnets to drive the piston to reciprocate in the needle-free syringe, so that the needle-free syringe can achieve high-speed and repeated injection of drugs. However, the piston and the electromagnetic drive device will generate heat after working at high speed, which will affect the injection effect of the needle-free injection device and make it impossible for the needle-free injection device to maintain high-frequency injection. In addition, although the existing electric injection device has been cleaned and disinfected, it is still easy to cause the mixing of liquid medicines, leading to cross infection.

[0003] 1. Poor heat dissipation The utility model with announcement number CN221636956U discloses an electromagnetic drive structure of a needle-free injection device, which includes a main unit of the needle-free injection device, an electromagnetic coil and a piston rod. The main unit includes a shell and a mounting sleeve. The mounting sleeve is arranged inside the shell. A telescopic cavity is provided in the middle of the mounting sleeve. An electromagnetic drive unit is provided on the piston rod. The electromagnetic drive unit is accommodated in the telescopic cavity. The electromagnetic coil is sleeved and installed on the outside of the mounting sleeve. The electromagnetic drive unit moves in the telescopic cavity under the drive of the electromagnetic coil. The mounting sleeve is provided with a sealed cooling cavity between the electromagnetic coil and the telescopic cavity. The cooling cavity is connected to the cooling liquid outside the shell through a cooling pipe.

[0004] The utility model with announcement number CN221636956U discloses a contactless electromagnetic injection system, including a contactless electromagnetic syringe and a control host. The contactless electromagnetic syringe 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 unit, and a solution supply unit. The solution supply unit and the nozzle unit are connected to the solution holding chamber. The contactless electromagnetic injection head is provided with an elastic sealing assembly. The energy supply unit includes an impact hammer, an electromagnetic acceleration assembly, an electromagnetic warhead, and an elastic reset assembly. The scheme performs temperature regulation by setting a water circulation chamber and an external circulation water tank.

[0005] Most of the existing technologies achieve the purpose of heat dissipation by connecting an external cooling medium to the injection device, but a pipe or other structure is required to connect the cooling medium to the injection device, which is not only complicated to operate, but also increases the volume of the injection device, reduces the flexibility of the device, and has poor cooling effect and efficiency.

[0006] 2. Incomplete disinfection and cleaning leads to cross infection The utility model with announcement number CN221636956U discloses an electric needle-free syringe for animal husbandry, which includes a syringe, a battery, a switch, an air pipe, a solenoid valve, and a solenoid valve. An adjusting block is fixedly installed at one end of the air pipe, and a gas cylinder connector is fixedly installed on the side of the adjusting block. The high-pressure gas cylinder and the gas cylinder connector are movably installed. The size of the adjusting block can be adjusted according to animals of different sizes to control the size of the airflow, thereby improving the applicability of the syringe. A medicine tank connecting seat is fixedly installed on the top surface of the syringe, a water intake pipe is installed on the bottom surface of the medicine tank connecting seat, and the air pipe and the water intake pipe are installed, so that the medicine is stored in the medicine tank, and multiple injections can be performed continuously. After the injection is completed, the cleaning liquid is loaded into the medicine tank, and the medicine tank and the injection head are cleaned by the airflow. However, the method of cleaning the medicine tank and the injection head by the cleaning liquid cannot completely avoid cross infection caused by improper cleaning operation.

[0007] Therefore, it is necessary to make improvements to the existing technology to enhance the heat dissipation effect of the injection device and avoid cross infection caused by incomplete disinfection. Summary of the invention

[0008] The object of the present invention is to provide a three-way head quick-release assembly for an injection handpiece, which partially solves or alleviates the above-mentioned deficiencies in the prior art, can achieve rapid disassembly of the three-way head consumables inside the injection handpiece, avoid cross-infection of drug solutions, and improve work efficiency.

[0009] In order to solve the above-mentioned technical problems, the present invention specifically adopts the following technical solutions: The present invention provides a three-way quick-release assembly of an injection handpiece, the injection handpiece comprising a handpiece body, a three-way quick-release assembly and a three-way head, the handpiece body comprising a first cover plate, a fixing device extending outwardly on the first cover plate to form a first cavity, the first cavity being used to accommodate a push rod capable of reciprocating movement, the fixing device being provided with a thread, and the three-way quick-release assembly comprising a connecting portion and a rotating member; The connecting part is provided with a thread inside, the connecting part is threadedly connected with the fixing device, and at least one mounting hole is also provided on the connecting part; the rotating member is provided with a thread, and the rotating member is threadedly connected with the connecting part through the mounting hole; the first end of the connecting part is recessed inward to form at least one accommodating space, and the first end of the connecting part is also provided with a first clamping structure, and correspondingly, the second end of the tee is provided with at least one second clamping structure corresponding to the first clamping structure, and the connecting part and the tee are mutually clamped through the first clamping structure and the second clamping structure; When a force in a first direction is applied to the connecting portion so that the connecting portion is screwed into the fixing device, a gap is left between the connecting portion and the fixing device, and at this time, the connecting portion and the fixing device are preliminarily connected; when the three-way head enters the accommodating space from a first angle, the second clamping structure correspondingly extends into the accommodating space, and when the three-way head is rotated to a second angle, the second clamping structure is staggered from the accommodating space, and the second clamping structure and the first clamping structure are mutually clamped, and at this time, the connecting portion and the three-way head are preliminarily connected; when a force in a second direction is applied to the rotating member so that the rotating member is screwed into the connecting portion, the gap between the connecting portion and the fixing device is reduced, and at this time, the three-way head is tightly connected to the fixing device through the connecting portion.

[0010] In some embodiments, a front end cover and a rear end cover are respectively provided at both ends of the hand tool body, 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 head also includes a liquid inlet end and a liquid outlet end, the liquid inlet end is connected to the infusion device through a catheter, and the liquid outlet end is connected to the nozzle.

[0011] In some embodiments, the inner diameter of the connecting portion is greater than or equal to the outer diameter of the fixing device.

[0012] In some embodiments, the connecting portion includes a first connecting portion and a second connecting portion, the first connecting portion is used to form a second cavity for the second clamping structure to rotate, and the second connecting portion is used to be sleeved on the fixing device.

[0013] In some embodiments, a motor, a fan and an electronic control device are sequentially arranged between the front end cover and the rear end cover along the axial direction.

[0014] In some embodiments, a distance L1 between the end of the motor and the first side of the fan is 10-30 mm.

[0015] Furthermore, in some embodiments, the distance L1 is 20-30 mm.

[0016] As a preference, in some embodiments, the distance L1 is 25 mm.

[0017] In some embodiments, a distance L2 between the second side of the fan and the first end of the electric control device is 10-20 mm.

[0018] Preferably, in some embodiments, the distance L2 is 15 mm.

[0019] In some embodiments, the electronic control device includes a temperature sensing module and a control unit, the temperature sensing module includes a first temperature detection module, and the first temperature detection module is configured to detect a first detection temperature at a first moment; when it is detected that the first detection temperature is 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.

[0020] In some embodiments, the temperature sensing module also includes a second temperature detection module, which is configured to detect a second detection temperature at a second moment; when it is detected that 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 forced to shut down.

[0021] In other embodiments, when the second temperature detection module detects that the second detection temperature is lower than a set second temperature, a third control signal is correspondingly generated, and the control unit receives the third control signal to control the fan to stop working.

[0022] In some embodiments, the injection handpiece further includes a start switch, which is disposed on an outer surface of the housing corresponding to the electric control device and is connected to the electric control device.

[0023] Beneficial technical effects: In view of the need to replace different liquid medicines for continuous injection, in order to avoid cross-infection of liquid medicines and save costs, this application designs a three-way head quick-release assembly for an injection handpiece. The three-way head quick-release assembly ensures that during frequent strong vibrations, the three-way head is firmly connected to the handpiece body through the connecting part and the rotating part. At the same time, it is also easier to replace during use, saving the workload of the operator, improving work efficiency, and ensuring the sealing during the disassembly process. When the three-way head is damaged, it is easy to disassemble and replace it separately without throwing away the entire injection handpiece, saving costs.

[0024] Correspondingly, the present application also provides an injection handpiece with a restrictive heat dissipation mode with three-partitioned optimized spaces. This restrictive heat dissipation mode enables graded heat dissipation inside the injection handpiece. In order to meet the requirements of enhancing the heat dissipation of the motor without increasing the volume of the injection handpiece and ensuring that the injection handpiece can operate stably during continuous multiple uses, the present application sets a small-volume fan between the motor and the electronic control device to achieve primary heat dissipation of the motor. On the one hand, when the fan is not started, 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 area, avoiding heat accumulation around the motor and slowing down the heating rate of the motor. On the other hand, when the fan is started, the heat accumulated in the second heat dissipation space is quickly transferred to the third heat dissipation space by the airflow and then discharged from the third ventilation area, so that the heat dissipation efficiency of the motor is higher than that of the electronic control device.

[0025] In addition, the present application also provides a temperature control component (i.e., a temperature sensing module and a control unit) that performs intelligent gradient adjustment based on the temperature change in the specific interval of the second heat dissipation space. Specifically, the present invention proposes a restrictive fan heat dissipation mechanism based on this three-partitioned optimized space, which can avoid the risk of over-adjustment of the fan to a certain extent (restrictive start-up control of the fan) through indirect temperature detection of the second heat dissipation space, and at the same time, through the coordinated cooperation of graded regulation and double detection, it can ensure that the adjustment efficiency is relatively reliable under the control of restrictive start-up of the fan. In other words, the present application can limit the fan at two levels: spatial volume and rotation power consumption, so that the heat is effectively dissipated, and the impact of the fan on the motor and the electronic control device is relatively small (the vibration impact of the fan is relatively limited), and at the same time, it will not increase the volume of the injection handpiece too much, which will bring inconvenience to the actual use of the staff.

[0026] Specifically, the temperature control component is designed to be fault-tolerant, that is, it can simultaneously realize dual detection and recording of temperature change trend and real-time temperature, avoiding "over-regulation" of the fan, and also reducing the performance requirements of the temperature sensing module (or temperature sensor). When the value of the temperature change trend decreases within a specific period of time, it is considered that the temperature change trend is controlled, and the fan continues to run at the current speed; when the temperature sensing module is overly sensitive, once abnormal data is detected within the specific period of time (the abnormal data can be a value greater than or equal to the set fourth temperature, or it can also be a value less than the set second temperature), a corresponding control signal will be immediately issued to regulate the fan. The intelligent gradient-regulated temperature control component of the present invention is designed with a judgment standard. When abnormal data appears, the corresponding control signal will be issued only when the amount of abnormal data is greater than or equal to the set abnormal amount, which makes the working mode of the fan more flexible and also reduces the requirements for the sensitivity of the temperature sensing module.

[0027] The injection handpiece of the present invention realizes the intermittent operation of the fan, avoids mechanical wear and noise caused by excessive adjustment of the fan and long-term operation of the fan, and avoids the influence of heat generated by long-term operation of the fan on the motor and the electronic control device. The design of the intermittent operation mode of the fan also leads to less power consumption, saves energy costs, and also reduces the maintenance cost and work intensity of the fan.

[0028] In order to facilitate the replacement of internal consumables, the present application also designs a quick-release assembly for the face shell of the injection handpiece to reduce the operating time and work difficulty of the operator. On the one hand, the quick-release assembly of the face shell ensures that the face shell can be firmly connected to the handpiece during frequent strong vibrations through the clamping design and magnetic attraction. On the other hand, it also allows the face shell to be disassembled by simply applying external force, which facilitates the subsequent replacement of consumables and shortens the disassembly time of the operator. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale. Obviously, the drawings described below are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings without paying creative labor.

[0030] Figure 1 This is a schematic diagram of a first partial structure of an injection handpiece in one embodiment of the present application; Figure 2 This is a three-dimensional schematic diagram of a partial structure of an injection handpiece in one embodiment of the present application; Figure 3 This is a schematic diagram of a second partial structure of an injection handpiece in one embodiment of the present application; Figure 4 This is a schematic diagram of a third partial structure of an injection handpiece in one embodiment of the present application; Figure 5 This is a schematic diagram of the longitudinal cross-section structure of an injection handpiece in one embodiment of the present application; Figure 6 This is a first structural schematic diagram of a quick-release assembly of a face shell in one of the embodiments of the present application; Figure 7 This is a second structural schematic diagram of the face shell quick-release assembly in one of the embodiments of the present application; Figure 8 This is a schematic diagram of the first structure of the face shell in one of the embodiments of the present application; Fig. 9 This is a second structural schematic diagram of the face shell in one of the embodiments of the present application; Fig.10 This is a third structural schematic diagram of the face shell in one of the embodiments of the present application; Fig.11 This is a first structural schematic diagram of a three-way quick-release assembly in one of the embodiments of the present application; Fig.12 This is a second structural schematic diagram of a three-way quick-release assembly in one of the embodiments of the present application; Fig.13 This is a third structural schematic diagram of a three-way quick-release assembly in one of the embodiments of the present application.

[0031] Summary of reference numerals: 1 shell; 10 side shell, 101 first shell, 102 second shell, 103 splint, 104 fixing channel, 105 first step; 14 tool body, 21 first cover plate, 211 second step, 13 rear end cover; 2 motor, 231 second protrusion; 3 fan, 31 first protrusion, 311 wire installation port, 32 shock absorber; 4 electric control device, 41 control module; 5 connecting part, 51 accommodating space, 52 installation hole, 53 third fixing plate, 6 rotating part; 7 three-way head, 71 liquid inlet end, 72 liquid outlet end, 73 second end of the three-way head, 731 second clamping structure; 8 fixing device; 11 side shell bracket, 111 clamping hole; 12 magnetic element. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0033] Herein, suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present invention, and have no specific meanings by themselves. Therefore, "module", "component" or "unit" can be used mixedly.

[0034] In this document, the terms "upper", "lower", "inner", "outer", "front", "back", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0035] In this document, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Herein "and / or" includes any and all combinations of one or more of the associated listed items.

[0037] Herein, "plurality" means two or more than two, ie, it includes two, three, four, five, etc.

[0038] As used in this specification, the term "about" typically means + / - 5% of the stated value, more typically + / - 4% of the stated value, more typically + / - 3% of the stated value, more typically + / - 2% of the stated value, even more typically + / - 1% of the stated value, and even more typically + / - 0.5% of the stated value.

[0039] In this specification, some embodiments may be disclosed in a format of being in a range. It should be understood that this description of "being in a range" is only for convenience and brevity, and should not be interpreted as a rigid limitation on the disclosed range. Therefore, the description of the range should be considered to have specifically disclosed all possible sub-ranges and independent numerical values ​​within this range. For example, the description of the range 1-6 should be considered to have specifically disclosed sub-ranges 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., as well as individual numbers within this range, such as 1, 2, 3, 4, 5 and 6. Regardless of the breadth of the range, the above rules apply.

[0040] Definition of noun: Radial height: The radial height described herein refers to the height in a direction perpendicular or approximately perpendicular to the axial direction of the injection handpiece.

[0041] See also Figure 1-Figure 5 As shown, the present application provides an injection handpiece, which is light in weight, small in size, and has good heat dissipation efficiency for the motor, thereby ensuring that the motor can be in a state of high working efficiency for a long time.

[0042] See also Figure 6-Figure 10As shown, the present application provides a three-way head quick-release assembly for an injection handpiece, which can ensure that the three-way head is firmly connected during the continuous use of the injection handpiece, thereby achieving the working stability of the injection handpiece, and can also enable it to be quickly disassembled, thereby reducing time and labor costs and effectively avoiding cross-infection of drug solutions.

[0043] See also Figure 11-13 As shown, the present application also provides a quick-release assembly for a face shell of an injection handpiece, which not only ensures the working stability of the face shell under frequent strong vibration conditions, but also has an anti-foolproof design, and the disassembly is simpler and more efficient, so as to facilitate the replacement of internal consumables and auxiliary materials.

[0044] Example 1 The present application provides an injection handpiece, which includes: a shell 1, which includes: a handpiece body 14, and a front end cover and a rear end cover 13 are respectively provided at both ends of the handpiece body; an injection module, 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, and the electronic control device 4 includes a temperature sensor module 41 and a control unit.

[0045] A first heat dissipation space I is formed between the outer shell 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; When the motor is started, heat is generated, and the heat is transferred from the first heat dissipation space I to the second heat dissipation space II and accumulated in the second heat dissipation space; when the temperature sensing module detects that the heat accumulated in the second heat dissipation space II causes the temperature to reach a set value, the fan is automatically turned on; Wherein, the front end cover is provided with 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 end cover is provided with a third ventilation area with a third ventilation area; when the fan is started, a negative pressure is formed in the third heat dissipation space, and 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, and then the airflow is discharged through the third ventilation area at a third flow rate; At least one first protrusion 31 is provided along the axial direction on the inner surface of the housing corresponding to the fan 3 to facilitate fixing the fan, and a shock absorbing member 32 is installed between adjacent first protrusions.

[0046] In some embodiments, a length L1 of the second heat dissipation space along the axial direction of the housing is 10-30 mm.

[0047] In some embodiments, a distance L2 between the second side of the fan and the first end of the electric control device is 10-20 mm, which is conducive to timely detection of the temperature of the second heat dissipation space.

[0048] Furthermore, in some embodiments, the length L1 is 20-30 mm.

[0049] Preferably, in some embodiments, the length L1 is 25 mm, and the distance L2 is 15 mm.

[0050] 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.

[0051] In some embodiments, the shock absorbing member is a shock absorbing rubber, and two or more pieces of the shock absorbing rubber may be provided to reduce the noise caused by motor vibration during continuous multiple use of the injection handpiece, and at the same time fix the fan together with the first protrusion.

[0052] In some embodiments, a plurality of groups of wires are arranged between the motor 2 and the electric control device 4 , and a wire installation opening 311 for guiding the wires is arranged on the first protrusion.

[0053] Furthermore, in some embodiments, the number of the wire installation openings may be 2 or 3.

[0054] In some embodiments, at least one second protrusion 231 is provided on the inner surface of the shell between the motor 2 and the fan 3, and the adjacent inner surfaces between adjacent second protrusions jointly form a wire installation groove, so that the wire can pass through the first protrusion along the wire installation groove and the wire installation port in sequence.

[0055] The present invention can perform graded adjustment on the temperature of the second heat dissipation space, as shown below.

[0056] 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 it is detected that the first detection temperature is greater than the 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.

[0057] In other embodiments, the temperature sensing module 41 also includes a second temperature detection module, which is configured to detect a second detection temperature of the second heat dissipation space at a second moment; when it is detected that 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 forced to shut down.

[0058] In other embodiments, when the second temperature detection module detects that the second detection temperature is lower than a set second temperature, a third control signal is correspondingly generated, and the control unit receives the third control signal to control the fan to stop working.

[0059] In another embodiment, the temperature sensing module 41 also includes a third temperature detection module, and the third temperature detection module is used to continuously detect the temperature rising trend; when it is detected that the temperature rising trend has 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.

[0060] In some other embodiments, the third temperature detection module can also be used to detect a third detected temperature of the second heat dissipation space at a third moment; when it is detected that the third detected 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 secondary speed. In some embodiments, the third temperature is greater than the first temperature.

[0061] For example, in some embodiments, the third temperature detection module is used to detect the temperature change trend in the first time period after the fan is started according to the corresponding control signal. For example, after the fan is started according to the first-level speed, it continues to monitor the second heat dissipation space II in the set first time period, and determines the temperature change trend in at least two sub-time periods in the first time period according to the multiple fourth detection temperatures: when the temperature change trend gradually decreases over time, the fan can maintain the 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 to work at the first-level speed; when the temperature change trend increases or remains 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 working at the second-level speed.

[0062] For example, in some embodiments, the temperature change trend in a sub-period may be an average value of the rate of change of the temperature in the period. In some embodiments, the at least two temperature change trends collected in the first period may be two temperature change trends in the initial period and the final period of the first period, or the multiple temperature change trends may be multiple temperature change trends of multiple sub-periods collected at intervals in the first period. When the value of the overall temperature change trend in the period decreases, it is considered that the temperature change trend is controlled, and the fan can continue to run at the current speed.

[0063] In some embodiments, the temperature change trend refers to the rate of change of temperature per unit time.

[0064] In other embodiments, the temperature sensing module 41 further includes a fourth temperature detection module, and the fourth temperature detection module is used for: when the temperature detected within the first time period (for example, it may be other temperature data measured by the temperature detection module outside multiple sub-time periods within the time period, or it may also be part of the data of multiple fourth detected temperatures) exceeds the set fourth temperature, or is less than the second temperature, the temperature will be recorded as abnormal data; when the amount of abnormal data within the set time (such as the first time period) is less than the set abnormal amount, the fan is allowed to continue working at the secondary speed; when the amount of abnormal data within the 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.

[0065] Preferably, in some embodiments, the temperature detection module can perform synchronous dual detection and recording of temperature change trends and values. For example, within a unit time (such as the first period), the temperature change trend gradually decreases, but there is abnormal data with a value greater than the fourth temperature. In this case, the fan will not immediately increase the speed to work; or, if there is abnormal data with a value less than the second temperature, the fan will not immediately stop working. Under the design of the present invention, it will first be determined whether the frequency of occurrence of abnormal data is high. When the amount of abnormal data is greater than or equal to the set abnormal amount, the control unit will send a corresponding control signal.

[0066] The intelligent gradient adjustment design for the temperature change of the second heat dissipation space in this application, on the one hand, avoids the high-intensity operation of the fan caused by the occurrence of accidental (or erroneous) abnormal data, reduces the interference of the vibration caused by the high-intensity operation of the fan on the motor and the electronic control device, and reduces the mechanical wear of the fan, which is conducive to extending the service life of the fan; on the other hand, it also avoids the overheating of the motor caused by the fan stopping working due to the occurrence of accidental (or erroneous) abnormal data, and realizes effective heat dissipation of the motor. This dual detection is similar to a fault-tolerant design of the temperature detection module, which can make more reasonable use of the fan and reduce the performance requirements of the fan and the temperature sensor module (or temperature sensor).

[0067] In some embodiments, when the first temperature detection module detects that the temperature in the second heat dissipation space is greater than 80°C, a first control signal is generated, 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, a third control signal is generated accordingly. The control unit receives the third control signal and sends a off signal to the fan. At this time, the fan stops working and the motor continues to operate normally.

[0068] In some embodiments, a temperature sensing module (or temperature sensor) can be used to collect temperature data in real time or periodically.

[0069] In some embodiments, the temperature of the second heat dissipation space detected by the temperature sensing module may be the overall average temperature of the second heat dissipation space, or may be the temperature of a certain position in the second heat dissipation space or the average temperature of multiple positions.

[0070] In some embodiments, the first ventilation area is larger than the second ventilation area, so that the airflow guides the heat to flow quickly from the first heat dissipation space to the second ventilation area; the second flow rate is larger than the first flow rate.

[0071] In some 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.

[0072] In some embodiments, the front end cover is a face shell of an injection handpiece.

[0073] In some embodiments, the injection handpiece cover is made of plastic.

[0074] In some embodiments, a plurality of vents are provided on the first ventilation area, and a plurality of heat dissipation ports are provided on the third ventilation area, so that airflow enters the first heat dissipation space from the vents, and guides the heat to be discharged from the heat dissipation ports through the second heat dissipation space and the third heat dissipation space.

[0075] In some embodiments, the fan is an axial flow fan, a centrifugal fan, or a mixed flow fan.

[0076] As a preference, in some embodiments, the fan is an axial flow fan, and the outer shell of the fan is circular in shape so as to better fit the hand tool housing.

[0077] Furthermore, in order to verify that the motor in the injection handpiece of the present application can work normally, the temperature of the motor and the handpiece housing was tested at different distances between the motor and the axial fan. The results are shown in Table 1 below.

[0078] Table 1 The results show that by 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, the motor can be efficiently dissipated under the action of the fan, and the temperature of the motor is about 80°C. At this time, the motor has a high working efficiency, and the temperature of the injection handpiece is also low, which will not burn the operator's skin and is convenient for the operator to use. The above results also show that on the basis of the three-partition design of the present invention, setting the length of the second heat dissipation space within a smaller range (such as 20-30 mm) has a better heat dissipation effect on the motor, indicating that even if a fan is provided in the present invention, the volume of the injection handpiece will not be significantly increased, and the overall volume of the injection handpiece is still small.

[0079] In some embodiments, the injection module includes an infusion device and a nozzle, and a propulsion rod capable of reciprocating along the cavity of the nozzle, and the infusion device is a medical injection syringe.

[0080] In some embodiments, the injection handpiece further includes a start switch, which is disposed on an outer surface of the housing corresponding to the electric control device and is connected to the electric control device.

[0081] 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 a radial height of the first fixing plate is greater than a radial height of the second fixing plate.

[0082] Furthermore, in some embodiments, first fixing plates are provided at both ends of the fan to facilitate fixing the fan inside the hand tool housing.

[0083] The present application proposes an injection handpiece with a restrictive heat dissipation mode with three-partition optimized spaces. In the injection handpiece of the present invention, the fan is located between the motor and the electronic control device, and the distance between the fan and the motor is optimally 20-30 mm. The distributed arrangement of the motor, the fan and the electronic control device not only enables the heat generated by the motor during continuous use to be discharged preferentially under the action of the fan, thereby ensuring the working efficiency of the motor, but also ensures that the electronic control device is away from the heat source, enabling efficient data transmission, and also makes the position design of the start switch connected to the electronic control device more ergonomic.

[0084] Furthermore, the three-partition design enables multi-zone heat dissipation to be formed inside the injection handpiece. Specifically, a first heat dissipation space is formed between the motor housing and the inner surface of the shell, 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; the heat generated by the motor during continuous use is transferred from the first heat dissipation space to the second heat dissipation space driven by the airflow to ensure the normal operation of the motor in the early stage of use, and is conducive to appropriately extending the service life of the motor; when the heat accumulated in the second heat dissipation space causes the temperature to reach the set temperature value, the fan is automatically turned on, and the heat dissipation efficiency is accelerated at this time. Under the action of the fan, the temperature in the second heat dissipation space is rapidly reduced, and the motor is preferentially dissipated. The accumulated heat is quickly transferred to the third heat dissipation space and then discharged through the heat dissipation port on the rear end cover.

[0085] This zoned heat dissipation and multi-zone coordinated heat dissipation method enables the injection handpiece of the present invention to have a higher heat dissipation efficiency for the motor. In addition, during the continuous use of the injection handpiece, the motor will generate greater vibrations. The shock absorber arranged around the fan of the present invention not only reduces the noise generated by the continuous operation of the motor, but also, together with the first protrusion, ensures the working stability of the fan under frequent strong vibration conditions, ensuring continuous heat dissipation. In the use scenario where the injection cycle is long and multiple consecutive injections are required, the injection handpiece of the present invention can not only improve the heat dissipation efficiency and speed up the heat dissipation speed, but also ensure the working stability of the injection handpiece during use.

[0086] At the same time, this partitioned and graded heat dissipation mode can also reduce the impact of motor and fan operation on the electronic control device.

[0087] When there are strict requirements on the injection position, under the synergistic effect of the corresponding structures related to the three-partition optimized space and the restrictive fan heat dissipation mechanism of the present invention, the working stability of the injection handpiece is maintained under the strong vibration generated by the operation of the motor and the fan, thereby ensuring its injection accuracy, ensuring the safety and accuracy of the injection, and also having a certain effect of reducing noise.

[0088] The three-partition optimized space design of the present application realizes the priority heat dissipation of the motor without increasing the size of the injection handpiece too much, so that the motor is in a state of high working efficiency. The fan used in the present invention is small in size, so that the overall weight of the injection handpiece is light. At the same time, the design of the temperature sensor module and the control unit allows the fan to automatically start and stop working, avoiding the fan being in a working state all the time. The intermittent working mode of the fan reduces the adverse effects caused by long-term work.

[0089] Example 2 The present application also provides a three-way quick-release assembly of an injection handpiece, the injection handpiece includes a handpiece body 14, a three-way quick-release assembly and a three-way head 7, the handpiece body 14 includes a first cover plate 21, a fixing device 8 extending outwardly from the first cover plate to form a first cavity, the first cavity is used to accommodate a push rod capable of reciprocating movement, the fixing device 8 is provided with a thread, and the three-way quick-release assembly includes a connecting portion 5 and a rotating member 6.

[0090] Among them, the connecting part 5 is provided with a thread inside, the connecting part 5 is threadedly connected to the fixing device 8, and at least one mounting hole 52 is also provided on the connecting part 5; the rotating member 6 is provided with a thread, and the rotating member 6 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, and a first clamping structure is also provided inside the connecting part, and correspondingly, at least one second clamping structure 731 corresponding to the first clamping structure is provided on the second end 73 of the tee head, and the connecting part 5 and the tee head 7 are clamped to each other through the first clamping structure and the second clamping structure.

[0091] When a force in a first direction is applied to the connecting portion 5 so that the connecting portion is screwed into the fixing device 8, a gap is left between the connecting portion 5 and the fixing device 8, and at this time, the connecting portion 5 and the fixing device 8 are preliminarily connected; when the three-way head 7 enters the accommodating space 51 from a first angle, the second clamping structure 731 correspondingly extends into the accommodating space 51, and when the three-way head is rotated to a second angle, the second clamping structure is staggered from the accommodating space, and the second clamping structure and the first clamping structure are mutually clamped, and at this time, the connecting portion 5 and the three-way head 7 are preliminarily connected; when a force in a second direction is applied to the rotating member 6 so that the rotating member is screwed into the connecting portion 5, the gap between the connecting portion 5 and the fixing device 8 is reduced, and at this time, the three-way head 7 is tightly connected to the fixing device 8 through the connecting portion 5.

[0092] In some embodiments, the connecting portion is a quick-release nut, and the rotating member is a set screw.

[0093] In some embodiments, the accommodating space 51 may be a completely disconnected notch formed by the first end of the connecting portion being completely recessed inwards, such as Fig.12 shown.

[0094] In other embodiments, the accommodating space may be a groove formed by the first end portion of the connecting portion being recessed inwardly, as long as it can accommodate the second clamping structure.

[0095] In some embodiments, a front end cover and a rear end cover 13 are respectively provided at both ends of the hand tool body, 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 head 7 also includes a liquid inlet end 71 and a liquid outlet end 72, the liquid inlet end is connected to the infusion device through a catheter, and the liquid outlet end is connected to the nozzle.

[0096] In some embodiments, the connecting portion 5 is sleeved on the fixing device 8 . In other words, the inner diameter of the connecting portion 5 is greater than or equal to the outer diameter of the fixing device 8 .

[0097] In some embodiments, the third fixing plate 53 is extended from the edge of the first end of the connecting portion toward the center, and the third fixing plate 53 is connected to the edge of the first end of the connecting portion to form a slot.

[0098] In some embodiments, the first clamping structure is a clamping groove, and the second clamping structure is a buckle formed by an outward protrusion on the second end of the three-way connector.

[0099] In some other embodiments, the connecting portion includes a first connecting portion and a second connecting portion, the first connecting portion is used to form a second cavity for the second clamping structure 731 to rotate, and the second connecting portion is used to be sleeved on the fixing device.

[0100] In some embodiments, the second connection portion refers to a region including the internal threads of the connection portion, and the first connection portion refers to a region where the connection portion protrudes after the connection portion is sleeved on the fixing device, and may also be a region that does not include the internal threads of the connection portion.

[0101] In some embodiments, a motor 2, a fan 3 and an electric control device 4 are sequentially arranged between the front cover and the rear cover along the axial direction.

[0102] In some embodiments, a distance L1 between the end of the motor and the first side of the fan is 10-30 mm.

[0103] Furthermore, in some embodiments, the distance L1 is 20-30 mm.

[0104] In some embodiments, a distance L2 between the second side of the fan and the first end of the electric control device is 10-20 mm.

[0105] Preferably, in some embodiments, the distance L1 is 25 mm, and the distance L2 is 15 mm.

[0106] 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, and the first temperature detection module is configured to detect a first detection temperature at a first moment; when it is detected that the first detection temperature is greater than the 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.

[0107] In other embodiments, the temperature sensing module 41 also includes a second temperature detection module, which is configured to detect a second detection temperature at a second moment; when it is detected that 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 forced to shut down.

[0108] In other embodiments, when the second temperature detection module detects that the second detection temperature is lower than a set second temperature, a third control signal is correspondingly generated, and the control unit receives the third control signal to control the fan to stop working.

[0109] In some other embodiments, the hand tool body further includes a start switch, which is disposed on an outer surface of the housing corresponding to the electric control device and is connected to the electric control device.

[0110] The present application provides a three-way head quick-release assembly with a stable connection. On the one hand, the three-way head can be stably connected to the injection handpiece through the three-way head quick-release assembly of the present invention. The stable connection means that in the use scenario of the injection handpiece for continuous multiple injections, the motor will produce a large vibration. At this time, the three-way head is tightened on the injection handpiece by a rotating member for a second time, which reduces the impact of the motor vibration to a certain extent and ensures the working stability of the injection handpiece. In addition, the multiple clamping positions on the three-way head also ensure that it can be stably connected to the injection handpiece during use. On the other hand, the three-way head can be quickly disassembled through the three-way head quick-release assembly of the present invention. In the prior art, the traditional three-way head is replaced by special tools and professionals, and the process is cumbersome and complicated. The three-way head quick-release assembly of the present invention can be quickly disassembled by loosening the rotating member and appropriately rotating the three-way head until the second clamping structure on it overlaps with the accommodating space on the connecting part. In addition, when disassembling the three-way head, the infusion device filled with liquid medicine is inserted into the catheter. The one-way valve provided inside the three-way head of the present invention prevents the liquid medicine in the infusion device from flowing into the three-way head. In summary, the three-way head quick-release assembly of the present invention not only facilitates ordinary operators to quickly disassemble the three-way head, but also reduces the time cost and labor cost of replacing the three-way head, and ensures the sealing during the disassembly process. Compared with the repeated cleaning of the prior art, replacing the three-way head can better avoid cross-infection of the drug solution.

[0111] Example 3 The present application also provides a face shell quick-release assembly for an injection handpiece, the injection handpiece comprising a handpiece body 14, a face shell quick-release assembly and a face shell 10, the handpiece body comprising a first cover plate 21; wherein the face shell quick-release assembly comprises a face shell bracket 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 bracket 11 is provided with at least one locking hole 111, the locking hole is provided with a locking space and a first hole, the locking space is used to accommodate the magnetic element, the interior of the face shell 10 is provided with at least one fixing channel 104, the fixing screw passes through the first hole, is inserted into the fixing channel 104, and the face shell 10 and the face shell bracket 11 are connected to the first cover plate 21 through the magnetic element 12.

[0112] In some embodiments, the edge of the second end of the face shell is recessed inward to form a first latching position, and correspondingly, the edge of the first cover plate 21 is protruded outward to form a second latching position, and the edge of the face shell and the edge of the first cover plate are mutually engaged through the first latching position and the second latching position; or, the edge of the second end of the face shell is protruded outward to form a first latching position, and correspondingly, the edge of the first cover plate is recessed inward to form a second latching position, and the edge of the face shell and the edge of the first cover plate are mutually engaged through the first latching position and the second latching position.

[0113] In some embodiments, the face shell 10 includes a first shell 101 and a second shell 102 , wherein the length of the first shell along the axial direction is smaller than the length of the second shell along the axial direction, so that a first step 105 is formed at the connection between the first shell and the second shell.

[0114] In some embodiments, the magnetic element is a magnet.

[0115] In some embodiments, the first cover plate 21 protrudes outward to form a first convex surface and a second concave surface, so that a second step 211 matching the first step 105 is formed at the connection between the first convex surface and the second concave surface.

[0116] In some other embodiments, the first cover plate 21 may also be recessed inwardly to form a first convex surface and a second concave surface.

[0117] In some embodiments, a fixing device 8 with a first cavity is extended outwardly from the first cover plate 21, and the first cavity is used to accommodate a push rod capable of reciprocating movement, and the fixing device 8 is provided with a thread; the injection handpiece also includes a three-way head 7 and a three-way head quick-release assembly, and the three-way head quick-release assembly includes a connecting part 5 and a rotating part 6, and the connecting part 5 is provided with a thread inside, and the connecting part 5 is threadedly connected to the fixing device 8.

[0118] In some embodiments, at least one mounting hole 52 is further provided on the connecting portion 5 , and a thread is provided on the rotating member 6 . The rotating member 6 is threadedly connected to the connecting portion 5 through the mounting hole 52 .

[0119] In some embodiments, a first clamping structure is further provided inside the connecting portion, and correspondingly, at least one second clamping structure 731 is formed on the second end of the tee connector protruding outward, and the connecting portion 5 and the tee connector 7 are clamped to each other through the first clamping structure and the second clamping structure.

[0120] In some embodiments, the connecting portion includes a first connecting portion and a second connecting portion, the first connecting portion is used to form a second cavity for the second clamping structure 731 to rotate, and the second connecting portion is used to be sleeved on the fixing device.

[0121] In some embodiments, a splint 103 is provided inside the face shell, and the rotating member 6 is close to the first cover plate 21. Correspondingly, the inner side of the face shell bracket is recessed inward to form a first space, and the splint 103 is recessed inward to form a second space. Both the first space and the second space are used to accommodate the rotating member.

[0122] In other embodiments, the connecting portion 5 is sleeved on the fixing device 8 , which means that the inner diameter of the connecting portion 5 is greater than or equal to the outer diameter of the fixing device 8 .

[0123] The present application designs a fast-release assembly for a firmly connected face shell. On the one hand, the face shell can be stably connected to the injection handpiece through the quick-release assembly of the face shell of the present invention. Specifically, during the continuous use of the injection handpiece, the motor will generate a large vibration. At this time, the face shell can still be stably connected to the front end of the injection handpiece through the multiple clamping design of the quick-release assembly, and it is not easy to fall off. The multiple clamping design specifically refers to the clamping of the face shell bracket and the magnet, the clamping of the face shell bracket and the face shell, and the clamping of the face shell and the handpiece. The multiple clamping design not only improves the working stability of the face shell under frequent strong vibration conditions, but also ensures the stability of the face shell after disassembly and reassembly, and it is not easy to produce misalignment deviation. On the other hand, the face shell can be easily disassembled through the quick-release assembly of the face shell of the present invention. Specifically, since the face shell in this scheme is connected to the handpiece through the magnetic attraction of the quick-release assembly design, when the applied external force is greater than the magnetic attraction, the face shell can be disassembled. The quick-release assembly designed in this scheme only needs to simply apply external force to complete the disassembly process of the face shell, so as to facilitate the subsequent replacement of internal consumables and auxiliary materials.

[0124] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or device including the element.

[0125] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for a computer terminal (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0126] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation modes, which are merely illustrative rather than restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the present invention and the claims, all of which are within the protection of the present invention.

Claims

1. A three-way quick-release assembly for an injection handpiece, characterized in that: The injection handpiece comprises a handpiece body (14), a three-way quick-release assembly and a three-way head (7); the handpiece body (14) comprises a first cover plate (21); a fixing device (8) extending outwardly from the first cover plate forms a first cavity; the first cavity is used to accommodate a propulsion rod capable of reciprocating movement; the fixing device (8) is provided with threads; the three-way quick-release assembly comprises a connecting portion (5) and a rotating member (6); threads are provided inside the connecting portion (5); the connecting portion (5) is threadedly connected to the fixing device (8); the connecting portion (5) is also provided with threads to at least one mounting hole (52); the rotating member (6) is provided with a thread, and the rotating member (6) is threadedly connected to the connecting portion (5) through the mounting hole (52); the first end of the connecting portion is recessed inwardly to form at least one accommodating space (51), and a first clamping structure is further provided inside the connecting portion, and correspondingly, at least one second clamping structure (731) corresponding to the first clamping structure is provided on the second end (73) of the three-way head, and the connecting portion (5) and the three-way head (7) are mutually clamped through the first clamping structure and the second clamping structure; When a force in a first direction is applied to the connecting portion (5) so that the connecting portion is screwed into the fixing device (8), a gap is left between the connecting portion (5) and the fixing device (8), and at this time, the connecting portion (5) and the fixing device (8) are preliminarily connected; when the three-way head (7) enters the accommodating space (51) from a first angle, the second clamping structure (731) correspondingly extends into the accommodating space (51); when the three-way head is rotated to a second angle, the second clamping structure is offset from the accommodating space, and the second clamping structure and the first clamping structure are mutually clamped, and at this time, the connecting portion (5) and the three-way head (7) are preliminarily connected; when a force in a second direction is applied to the rotating member (6) so that the rotating member is screwed into the connecting portion (5), the gap between the connecting portion (5) and the fixing device (8) is reduced, and at this time, the three-way head (7) is tightly connected to the fixing device (8) through the connecting portion (5).

2. The three-way quick-release assembly according to claim 1, characterized in that: A front end cover and a rear end cover (13) are respectively provided at both ends of the hand tool body; an injection module is provided between the front end cover and the rear end cover; the injection module comprises an infusion device and a nozzle; the three-way head (7) further comprises a liquid inlet end (71) and a liquid outlet end (72); the liquid inlet end is connected to the infusion device via a catheter, and the liquid outlet end is connected to the nozzle.

3. The three-way quick-release assembly according to claim 1, characterized in that: The inner diameter of the connecting portion (5) is greater than or equal to the outer diameter of the fixing device (8).

4. The three-way quick-release assembly according to claim 3, characterized in that: The connecting portion comprises a first connecting portion and a second connecting portion, the first connecting portion being used to form a second cavity for the second clamping structure (731) to rotate, and the second connecting portion being used to be sleeved on the fixing device.

5. The three-way quick-release assembly according to claim 2, characterized in that: A motor (2), a fan (3) and an electric control device (4) are arranged in sequence between the front end cover and the rear end cover along the axial direction.

6. The three-way quick-release assembly according to claim 5, characterized in that: A distance L1 between the end of the motor and the first side of the fan is 10-30 mm.

7. The three-way quick-release assembly according to claim 5, characterized in that: A distance L2 between the second side of the fan and the first end of the electric control device is 10-20 mm.

8. The three-way quick-release assembly according to claim 5, characterized in that: The electric control device (4) comprises a temperature sensing module (41) and a control unit, wherein the temperature sensing module (41) comprises a first temperature detection module, wherein the first temperature detection module is configured to detect a first detection temperature at a first moment; when it is detected that the first detection temperature is greater than a set first temperature, a first control signal is correspondingly generated; and the control unit receives the first control signal to control the fan to automatically start at a first speed.

9. The three-way quick-release assembly according to claim 8, characterized in that: The temperature sensing module (41) further comprises a second temperature detection module, the second temperature detection module being configured to detect a second detection temperature at a second moment; when it is detected that 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 forced to shut down; or, when it is detected that the second detection temperature is less than a set second temperature, a third control signal is generated accordingly, and the control unit receives the third control signal to control the fan to stop working.

10. The three-way quick-release assembly according to claim 6, characterized in that: The injection handpiece further includes a start switch, which is disposed on an outer surface of the housing corresponding to the electric control device and is connected to the electric control device.

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