Injection hand tool

Abstract

The application relates to the field of medical equipment, in particular to an injection hand tool. The injection hand tool comprises a shell, the shell comprises a hand tool main body, the two ends of the hand tool main body are respectively provided with a front end cover and a rear end cover, an injection module, a motor, a fan and an electric control device are sequentially arranged between the front end cover and the rear end cover in the axial direction, the electric control device comprises a temperature sensing module and a control unit, at least one first protrusion is arranged on the inner surface of the shell corresponding to the fan in the axial direction, so as to fix the fan, and a damping piece is arranged between adjacent first protrusions. The injection hand tool is designed based on the three-separation optimization space limiting heat dissipation mode, hierarchical heat dissipation is realized in the injection hand tool, the preferential heat dissipation of the motor is met, and the volume of the injection hand tool is not excessively increased, so that the injection hand tool is convenient for operators to use.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical equipment, in particular to an injection hand tool. BACKGROUND

[0002] Needle-free injection is an injection method without a traditional needle tube, which disperses the liquid medicine into the subcutaneous tissue of the user through pressure, so that the user does not feel pain and fear, and it is more and more popular. Needle-free injectors have also begun to be widely used in the field of skin beauty. In order to enable the needle-free injector to inject medicine at a high frequency, the power structure of the needle-free injector has been improved in the prior art, such as using an electromagnet to drive a piston to reciprocate in the needle-free injector, so that the needle-free injector achieves a high-speed and repeated injection effect of medicine. However, the piston and the electromagnetic driving device will generate heat after high-speed operation, which will affect the injection effect of the needle-free injection device and make the needle-free injection device unable to maintain high-frequency injection. Moreover, although the existing electric injection device has been cleaned and disinfected, it is still easy to cause mixing of the liquid medicine, resulting in cross infection.

[0003] I. Poor heat dissipation effect

[0004] The utility model with publication number CN221636956U discloses an electromagnetic driving structure of a needle-free injection device, which comprises a host of the needle-free injection device, an electromagnetic coil and a piston rod. The host comprises a shell and a mounting sleeve. The mounting sleeve is arranged in the shell. The mounting sleeve is provided with an extension cavity in the middle. The piston rod is provided with an electromagnetic driving part. The electromagnetic driving part is accommodated in the extension cavity. The electromagnetic coil is sleeved and mounted on the outside of the mounting sleeve. The electromagnetic driving part moves in the extension cavity under the drive of the electromagnetic coil. The mounting sleeve is provided with a sealed cooling cavity between the electromagnetic coil and the extension cavity. The cooling cavity is connected to the cooling liquid outside the shell through a cooling pipeline.

[0005] The utility model with publication number CN221636956U discloses a contactless electromagnetic injection system, which comprises a contactless electromagnetic injector and a control host. The contactless electromagnetic injector comprises a contactless electromagnetic injection head, an energy supply part and a temperature control unit. The contactless electromagnetic injection head comprises a solution holding cavity, a nozzle part and a solution supply part. The solution supply part and the nozzle part are in communication with the solution holding cavity. The contactless electromagnetic injection head is provided with an elastic sealing assembly. The energy supply part comprises a striking hammer, an electromagnetic acceleration assembly, an electromagnetic bullet and an elastic return assembly. This scheme adjusts the temperature by arranging a water circulation cavity and an external circulating water tank.

[0006] Most of the prior art achieves the purpose of heat dissipation by externally connecting cooling medium on the injection device, but the structure such as pipeline is needed to connect the cooling medium with the injection device, which not only complicates the operation, but also increases the volume of the injection device, reduces the flexible use of the device, and the cooling effect is not good, and the cooling efficiency is not good.

[0007] Secondly, incomplete disinfection and cleaning leads to cross infection

[0008] The utility model discloses a kind of electric needleless injectors for livestock, and the electric needleless injector includes injector, and the injector includes battery, switch, trachea, electromagnetic valve, electromagnetic valve one, and adjusting block is fixedly installed at one end of trachea, gas cylinder connector is fixedly installed in the side surface of adjusting block, high-pressure gas tank is movably installed with gas cylinder connector, can be adjusted adjusting block size according to different volume size of animal, reach the size of controlling airflow, improve the applicability of injector, water tank connecting seat is fixedly installed on the top surface of injector, water pipe is installed in the bottom surface of water tank connecting seat, trachea is installed with water pipe, it is convenient to store medicine in water tank in water tank, and it can be injected continuously multiple times;When the scheme is completed, cleaning fluid is filled in water tank, and trachea and injection head are cleaned by airflow, but cross infection caused by non-standard cleaning operation cannot be completely avoided by the way that cleaning fluid is used to clean trachea and injection head.

[0009] Therefore, it is necessary to make improvements to the prior art to enhance the heat dissipation effect of the injection device and avoid cross infection caused by incomplete disinfection. SUMMARY

[0010] The present application aims to provide an injection hand tool, which partially solves or alleviates the above-mentioned deficiencies in the prior art, achieves efficient heat dissipation of the motor, does not excessively increase the volume of the injection hand tool, and is applicable to scenarios requiring continuous multiple injections.

[0011] To solve the above-mentioned technical problems, the present application specifically adopts the following technical solutions:

[0012] The present application provides an injection hand tool, which comprises a housing, wherein the housing comprises a hand tool body having a front end cover and a rear end cover arranged at two ends thereof respectively; an injection module, a motor, a fan and an electric control device are arranged in sequence in an axial direction between the front end cover and the rear end cover; and the electric control device comprises a temperature sensing module and a control unit.

[0013] The housing of the motor and the inner surface of the housing form a first heat dissipation space I, 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 the second side of the fan and the rear end cover form a third heat dissipation space III.

[0014] wherein, when the motor generates heat, 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 II; when the temperature sensor 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;

[0015] wherein, the front end cover is provided with a first ventilation area with a first ventilation area, the first heat dissipation space is provided with 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 in the working process is transferred to the second heat dissipation space through the second ventilation area under the guidance of the airflow at a second flow rate, and then the airflow is discharged through the third ventilation area at a third flow rate.

[0016] At least one first protrusion is arranged on the inner surface of the shell corresponding to the fan in the axial direction, so as to fix the fan, and a damping member is arranged between adjacent first protrusions.

[0017] In some embodiments, the length L1 of the second heat dissipation space in the axial direction of the shell is 10-30 mm.

[0018] Further, in some embodiments, the length L1 is 20-30 mm.

[0019] As a preferred, in some embodiments, the length L1 is 25 mm.

[0020] In some embodiments, the distance L2 between the second side of the fan and the first end of the electric control device is 10-20 mm.

[0021] As a preferred, in some embodiments, the distance L2 is 15 mm.

[0022] In some embodiments, a plurality of groups of wires are arranged between the motor and the electric control device, and the first protrusion is provided with a wire mounting opening for guiding the wires.

[0023] In some embodiments, at least one second protrusion is arranged on the inner surface of the shell between the motor and the fan, and the adjacent inner surfaces between adjacent second protrusions jointly form a wire mounting groove, so that the wires pass through the first protrusion along the wire mounting groove and the wire mounting opening in sequence.

[0024] In some embodiments, the temperature sensing module comprises a first temperature detection module,

[0025] The first temperature detection module is configured to detect a first detection temperature of the second heat dissipation space at a first time; 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 speed.

[0026] In some embodiments, the temperature sensing module further comprises a second temperature detection module,

[0027] The second temperature detection module is configured to detect a second detection temperature of the second heat dissipation space at a second time; when the second detection temperature is detected to exceed a set threshold value, a second control signal is generated accordingly, and the control unit receives the second control signal to control the injection hand tool to force shutdown.

[0028] In other embodiments, when the second temperature detection module detects 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.

[0029] In some embodiments, the first ventilation area is greater than the second ventilation area, so that the airflow guides the heat to flow quickly in the first heat dissipation space to the second ventilation area; the second flow rate is greater than the first flow rate.

[0030] In some embodiments, a plurality of air holes are provided on the first ventilation area, and a plurality of heat dissipation openings are provided on the third ventilation area, so that the airflow enters the first heat dissipation space from the air holes, and guides the heat to be discharged from the heat dissipation openings through the second heat dissipation space and the third heat dissipation space.

[0031] In some embodiments, the injection hand tool further comprises a start switch, which is arranged on the outer surface of the shell corresponding to the electronic control device and is in communication with the electronic control device.

[0032] In some embodiments, the first protrusion comprises: a first fixed plate and a second fixed plate arranged in the axial direction of the shell, the radial height of the first fixed plate being greater than the radial height of the second fixed plate.

[0033] Beneficial technical effects:

[0034] The application provides an injection hand tool with a restrictive heat dissipation mode with three separated optimization spaces, which realizes hierarchical heat dissipation in the injection hand tool. In order to meet the demand of enhancing the heat dissipation of the motor without increasing the volume of the injection hand tool and ensuring the stable operation of the injection hand tool during continuous use, the application sets a small fan between the motor and the electric control device to realize the first-level 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 the accumulation of heat around the motor and slowing down the temperature rise speed 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 and then discharged from the third ventilation area, so that the heat dissipation efficiency of the motor is higher than that of the electric control device.

[0035] In addition, the application also provides a temperature control assembly (i.e. temperature sensing module and control unit) based on the intelligent gradient adjustment of the temperature change in the second heat dissipation space. Specifically, the application proposes a restrictive fan heat dissipation mechanism based on the three separated optimization spaces, which can avoid the over-adjustment risk of the fan to a certain extent (restrictive start control of the fan) through indirect temperature detection of the second heat dissipation space, and ensure the relative reliability of the adjustment efficiency through the coordination of hierarchical adjustment and double detection under the control of the restrictive start of the fan. In other words, the application can limit the fan in terms of space volume and rotating power consumption, which not only effectively dissipates heat, but also relatively reduces the influence of the fan on the motor and the electric control device (the vibration influence of the fan is relatively limited), and does not increase the volume of the injection hand tool too much, which brings inconvenience to the actual use of the staff.

[0036] Specifically, the temperature control assembly is designed with fault tolerance, that is, it can realize double detection and recording of the temperature change trend and the real-time temperature, avoid the over-adjustment of the fan, and also reduce the performance requirements of the temperature sensing module (or temperature sensor). When the value of the temperature change trend decreases in a certain 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 too sensitive, once it detects abnormal data (the abnormal data can be a value greater than or equal to the set fourth temperature, or a value less than the set second temperature) in the certain period of time, it will immediately send a corresponding control signal to regulate the fan. The temperature control assembly with intelligent gradient adjustment of the application designs a judgment standard, when the abnormal data is greater than or equal to the set abnormal amount, the corresponding control signal is sent, which makes the working mode of the fan more flexible, and also reduces the sensitivity requirements of the temperature sensing module.

[0037] The injection hand tool of the application realizes interval working of the fan, avoids excessive regulation and control of the fan, mechanical wear and noise caused by long-term working of the fan, and influence of heat generated by long-term working of the fan on the motor and the electric control device. The interval working mode of the fan also leads to less power consumption, energy cost saving, and reduction of maintenance cost and working strength of the fan.

[0038] For the scene of continuous injection requiring replacement of different drug solutions, the application also designs a face shell quick disassembly assembly of the injection hand tool to reduce the time of the operator for replacing the auxiliary materials. On the one hand, the face shell quick disassembly assembly guarantees that the face shell can be stably connected with the hand tool in the process of frequent strong vibration through the clamping position design and magnetic attraction. On the other hand, the face shell can be disassembled only by simply applying external force, which is helpful for subsequent replacement of consumables and shortens the disassembly time of the operator.

[0039] In order to avoid cross infection of the drug solution and save cost, the application designs a tee joint quick disassembly assembly of the injection hand tool. The tee joint quick disassembly assembly guarantees that the tee joint is stably connected with the hand tool main body through the connecting part and the rotating part in the process of frequent strong vibration, and is also easier to replace in the process of use, thereby saving the workload of the operator, improving the working efficiency, and guaranteeing the sealing property in the disassembly process. When the tee joint is damaged, it can be individually disassembled and replaced without discarding the entire injection hand tool, thereby saving cost. BRIEF DESCRIPTION OF DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference signs. In the drawings, each element or part is not necessarily drawn according to the actual proportion. Obviously, the drawings described below are some embodiments of the application, and other drawings can be obtained by those skilled in the art without paying creative labor on the basis of these drawings.

[0041] Figure 1 It is a first local structure schematic diagram of the injection hand tool in one of the embodiments of the application;

[0042] Figure 2 It is a local structure perspective schematic diagram of the injection hand tool in one of the embodiments of the application;

[0043] Figure 3 It is a second local structure schematic diagram of the injection hand tool in one of the embodiments of the application;

[0044] Figure 4 It is a third local structure schematic diagram of the injection hand tool in one of the embodiments of the application;

[0045] Figure 5 Fig. 9 is a longitudinal sectional view of an injection hand tool according to an embodiment of the present application;

[0046] Figure 6 Fig. 10 is a first structure diagram of a face cover quick release assembly according to an embodiment of the present application;

[0047] Figure 7 Fig. 11 is a second structure diagram of a face cover quick release assembly according to an embodiment of the present application;

[0048] Figure 8 Fig. 12 is a first structure diagram of a face cover according to an embodiment of the present application;

[0049] Figure 9 Fig. 13 is a second structure diagram of a face cover according to an embodiment of the present application;

[0050] Figure 10 Fig. 14 is a third structure diagram of a face cover according to an embodiment of the present application;

[0051] Figure 11 Fig. 15 is a first structure diagram of a three-way head quick release assembly according to an embodiment of the present application;

[0052] Figure 12 Fig. 16 is a second structure diagram of a three-way head quick release assembly according to an embodiment of the present application;

[0053] Figure 13 Fig. 17 is a third structure diagram of a three-way head quick release assembly according to an embodiment of the present application.

[0054] SUMMARY OF REFERENCE NUMBERS: 1 housing, 10 face cover, 101 first housing, 102 second housing, 103 clamping plate, 104 fixed channel, 105 first step, 14 hand 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 mounting port, 32 shock absorbing member, 4 electronic control device, 41 control module, 5 connecting portion, 51 accommodation space, 52 mounting hole, 53 third fixing plate, 6 rotating member, 7 three-way head, 71 liquid inlet end, 72 liquid outlet end, 73 second end of three-way head, 731 second clamping structure, 8 fixing device, 11 face cover support, 111 clamping hole, 12 magnetic element. DETAILED DESCRIPTION

[0055] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following will be combined with the accompanying drawings for the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0056] Herein, the suffix such as "module", "part" or "unit" used for representing an element is only for facilitating the description of the present application, and has no specific meaning by itself. Therefore, "module", "part" or "unit" can be mixedly used.

[0057] Herein, the terms "upper", "lower", "inner", "outer", "front", "back", "one end", "the other end" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for facilitating the description of the present application and simplifying the description, and do not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0058] Herein, unless otherwise explicitly specified and limited, the terms "mount", "provided with", "connected" and the like should be understood broadly, for example, "connected" can be fixedly connected, or detachably connected, or integrally connected; can be mechanically connected, can be directly connected, or indirectly connected through an intermediate medium, can be the communication inside two elements. For a person of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0059] Herein, "and / or" includes any and all combinations of one or more listed associated items.

[0060] Herein, "a plurality of" means two or more, that is, it includes two, three, four, five, etc.

[0061] In the present 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, even more typically + / - 0.5% of the stated value.

[0062] In this specification, certain embodiments can be disclosed in a format that is a range. It is to be understood that such a range format is used only for convenience and brevity and should be interpreted in a flexible manner to include not only the numerical values explicitly recited as the limits of a range, but also to include all the individual numerical values corresponding to the range bounds. Therefore, a description of a range such as from 1 to 6 should be considered to have specifically disclosed sub-ranges such as from 1-3, from 1-4, from 1-5, from 2-4, from 2-6, from 3-6 etc., as well as individual numbers within that range, for example 1, 2, 3, 4, 5, and 6. This principle can apply to all instances in which a range of values is given, regardless of the breadth of the range.

[0063] Glossary:

[0064] 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 hand tool.

[0065] Referring to Figures 1-5 As shown, the present application provides an injection hand tool, which is light in weight, small in size, has good heat dissipation efficiency for the motor, and ensures that the motor can be in a high working efficiency state for a long time.

[0066] Referring to Figures 6-10 As shown, the present application provides a three-way head quick disassembly assembly of an injection hand tool, which can not only ensure stable connection of the three-way head during continuous use of the injection hand tool, realize working stability of the injection hand tool, but also can be quickly disassembled, reduces time cost and personnel cost, and can effectively avoid cross infection of the liquid medicine.

[0067] Referring to Figures 11-13 As shown, the present application further provides a face shell quick disassembly assembly of an injection hand tool, which not only ensures working stability of the face shell under frequent strong vibration, but also has an anti-fumble design, and is more simple and efficient to disassemble, so as to facilitate replacement of internal consumables and auxiliary materials.

[0068] Example 1

[0069] The present application provides an injection hand tool, which comprises a shell 1, the shell comprising a hand tool body 14, two ends of the hand tool 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 electric control device 4 are sequentially arranged between the front end cover and the rear end cover in an axial direction, and the electric control device 4 comprises a temperature sensing module 41 and a control unit.

[0070] The first heat dissipation space I is formed between the shell of the motor and the inner surface of the casing, the second heat dissipation space II is formed between the end of the motor and the first side of the fan, and the third heat dissipation space III is formed between the second side of the fan and the rear end cover.

[0071] When the motor is started, heat is generated and transferred from the first heat dissipation space I to the second heat dissipation space II and accumulated in the second heat dissipation space II. When the temperature sensor module detects that the accumulated heat in the second heat dissipation space II causes the temperature to reach a set value, the fan is automatically turned on.

[0072] The first ventilation area with a first ventilation area is arranged on the front end cover, the second heat dissipation space has a second ventilation area with a second ventilation area at the end of the motor, and the third ventilation area with a third ventilation area is arranged on the rear end cover. 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.

[0073] At least one first protrusion 31 is arranged on the inner surface of the casing corresponding to the fan 3 in the axial direction to facilitate the fixation of the fan, and a damping member 32 is arranged between adjacent first protrusions.

[0074] In some embodiments, the length L1 of the second heat dissipation space in the axial direction of the casing is 10-30 mm.

[0075] In some embodiments, the distance L2 between the second side of the fan and the first end of the control device is 10-20 mm, which is beneficial for timely detection of the temperature of the second heat dissipation space.

[0076] Further, in some embodiments, the length L1 is 20-30 mm.

[0077] As a preferred, in some embodiments, the length L1 is 25 mm and the distance L2 is 15 mm.

[0078] In some embodiments, the length of the second heat dissipation space in the axial direction of the casing is also the distance between the end of the motor and the first side of the fan.

[0079] In some embodiments, the damping member is damping rubber, and two or more pieces of damping rubber can be provided to reduce the noise caused by motor vibration during continuous use of the injection hand tool, and to fix the fan together with the first protrusion.

[0080] In some embodiments, a plurality of wires are provided between the motor 2 and the electronic control device 4, and the first protrusion is provided with a wire mounting opening 311 for guiding the wires.

[0081] Further, in some embodiments, the wire mounting opening can be provided in two or three.

[0082] In some embodiments, the inner surface of the shell between the motor 2 and the fan 3 is provided with at least one second protrusion 231, and the inner surfaces adjacent to the adjacent second protrusions are connected to form a wire mounting groove, so that the wires pass through the first protrusion along the wire mounting groove and the wire mounting opening in sequence.

[0083] The present application can be adjusted in stages according to the temperature of the second heat dissipation space, as shown below.

[0084] In some embodiments, the temperature sensing module 41 includes a first temperature detection module configured to detect a first detection temperature of the second heat dissipation space at a first time; when the first detection temperature is detected to be greater than a set first temperature, a first control signal is generated accordingly; and the control unit receives the first control signal to control the fan to automatically start at a first speed.

[0085] In other embodiments, the temperature sensing module 41 further includes a second temperature detection module configured to detect a second detection temperature of the second heat dissipation space at a second time; when the second detection temperature is detected to exceed a set threshold value, a second control signal is generated accordingly, and the control unit receives the second control signal to control the injection hand tool to shut down forcibly.

[0086] In other embodiments, when the second temperature detection module detects 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.

[0087] In yet another embodiment, the temperature sensing module 41 further includes a third temperature detection module for continuously detecting a temperature rising trend; when it is detected that the temperature rising trend does not decrease, a fourth control signal is generated accordingly; and the control unit receives the fourth control signal to control the fan to work at a second speed; wherein the second speed is greater than the first speed.

[0088] In some embodiments, the third temperature detecting module is configured to detect a third detection temperature of the second heat dissipation space at a third time point, and generate a fifth control signal when the third detection temperature exceeds a third preset temperature, and the control unit receives the fifth control signal to control the fan to operate at the second speed. In some embodiments, the third temperature is greater than the first temperature.

[0089] For example, in some embodiments, the third temperature detecting module is configured to detect a temperature variation trend in a first time period after the fan is started according to the corresponding control signal. For example, after the fan is started at the first speed, the fourth detection temperatures of the second heat dissipation space II in a first preset time period are continuously monitored, and the temperature variation trends in at least two sub-time periods in the first time period are determined according to the fourth detection temperatures. When the temperature variation trend gradually decreases over time, the fan can continue to operate at 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 operate at the first speed; when the temperature variation 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 operating at the second speed.

[0090] For example, in some embodiments, the temperature variation trend in a sub-time period can be the average of the change rate of the temperature in the sub-time period. In some embodiments, the at least two temperature variation trends collected in the first time period can be the two temperature variation trends in the initial time period and the end time period of the first time period, or the multiple temperature variation trends can be the multiple temperature variation trends collected in multiple sub-time periods in the first time period at intervals. When the value of the overall temperature variation trend in the time period decreases, it is considered that the temperature variation trend is controlled, and the fan can continue to operate at the current speed.

[0091] In some embodiments, the temperature variation trend refers to the change rate of the temperature per unit time.

[0092] In other embodiments, the temperature sensing module 41 further comprises a fourth temperature detection module, which is configured to: when the temperature detected in the first time period (which can be other temperature data measured by the temperature detection module in multiple sub-periods of the time period, or it can also be part of the fourth detection temperature data) 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 in the set time (such as the first period) is less than the set abnormal amount, the fan is allowed to continue to work at the second speed; when the amount of abnormal data in 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 stop the fan or the injection hand tool.

[0093] Preferably, in some embodiments, the temperature detection module can perform dual detection recording of temperature change trend and value, such as in 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 which case the fan will not immediately increase the speed to work; or there is abnormal data with a value less than the second temperature, and the fan will not immediately stop working. Under the design of the present application, it is first determined whether the frequency of occurrence of abnormal data is high, and 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.

[0094] The intelligent gradient adjustment design for the temperature change of the second heat dissipation space avoids the high-intensity work of the fan caused by accidental (or error) abnormal data, reduces the disturbance of the vibration generated by the high-intensity work of the fan on the motor and the electrical control device, and reduces the mechanical wear of the fan, which is beneficial to prolong the service life of the fan. On the other hand, it also avoids the stop of the fan caused by accidental (or error) abnormal data, which in turn causes the motor to overheat, thereby achieving effective heat dissipation of the motor. This dual detection is similar to a fault-tolerant design of the temperature detection module, which can more reasonably utilize the fan and reduce the performance requirements of the fan and the temperature sensing module (or temperature sensor).

[0095] In some embodiments, when the first temperature detection module detects that the temperature in the second heat dissipation space is greater than 80℃, a first control signal is generated, the control unit receives the first control signal and sends an opening signal to the fan, at which time the fan starts to work at the first speed to rapidly 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℃, a third control signal is generated in correspondence, the control unit receives the third control signal and sends a closing signal to the fan, at which time the fan stops working and the motor continues to operate normally.

[0096] In some embodiments, the temperature sensing module (or temperature sensor) can collect temperature data in real time or periodically.

[0097] In some embodiments, the temperature sensed by the temperature sensing module can be the average temperature of the entire second heat dissipation space, or the average temperature of the temperature of one or more locations in the second heat dissipation space.

[0098] In some embodiments, the first ventilation area is larger than the second ventilation area, so that the airflow guides the heat to flow quickly in the first heat dissipation space to the second ventilation area; the second flow rate is greater than the first flow rate.

[0099] In other embodiments, the third ventilation area is also larger than the second ventilation area, so that the heat is quickly discharged from the third ventilation area.

[0100] In some embodiments, the front end cover is the face shell of the injection hand tool.

[0101] In some embodiments, the material of the injection hand tool face shell is plastic.

[0102] In some embodiments, a plurality of air holes are provided on the first ventilation area, and a plurality of heat dissipation openings are provided on the third ventilation area, so that the airflow enters the first heat dissipation space from the air holes, and guides the heat to be discharged from the heat dissipation openings through the second heat dissipation space and the third heat dissipation space.

[0103] In some embodiments, the type of fan is an axial fan, a centrifugal fan or a mixed flow fan.

[0104] As a preferred, in some embodiments, the fan is an axial fan, and the shape of the fan housing is circular, so as to better fit the hand tool shell.

[0105] Further, in order to verify that the motor in the injection hand tool of the present application can work normally, the temperature of the motor and the hand tool shell under different distances between the motor and the axial fan is tested, and the results are shown in Table 1.

[0106] Table 1

[0107]

[0108] The results show that the length L1 of the second heat dissipation space (i.e. the distance L1 between the motor and the fan) is set in the range of 20-30 mm, and efficient heat dissipation of the motor can be achieved under the action of the fan, the temperature of the motor is about 80℃, at this time, the motor has high working efficiency, the temperature of the injection hand tool is also low, and the operator's skin will not be scalded, which is convenient for the operator to use. The above results also show that on the basis of the three-segment design of the present application, the length of the second heat dissipation space is set in a small range (such as 20-30 mm), which has a good heat dissipation effect on the motor, which shows that the present application does not significantly increase the volume of the injection hand tool even if the fan is set, and the overall volume of the injection hand tool is still small.

[0109] In some embodiments, the injection module comprises a syringe device and a nozzle, and a push rod capable of reciprocating along the cavity of the nozzle, the syringe device is a medical injection syringe.

[0110] In some embodiments, the injection hand tool further comprises a start switch, the start switch is arranged on the outer surface of the shell corresponding to the electric control device and is in communication with the electric control device.

[0111] In some embodiments, the first protrusion 31 comprises a first fixed plate and a second fixed plate arranged in the axial direction of the shell, and the radial height of the first fixed plate is greater than the radial height of the second fixed plate.

[0112] Further, in some embodiments, the first fixed plate is arranged at both ends of the fan, so as to fix the fan inside the hand tool shell.

[0113] The present application provides an injection hand tool with a three-segment optimized space and a limited heat dissipation mode. In the injection hand tool of the present application, the fan is located between the motor and the electric control device, and the distance between the fan and the motor is in the range of 20-30 mm. The distributed arrangement of the motor, the fan and the electric control device not only ensures that the heat generated by the motor during continuous use can be preferentially discharged under the action of the fan, thereby ensuring the working efficiency of the motor, but also ensures that the electric control device is away from the heat source, thereby enabling efficient data transmission, and the position design of the start switch in communication with the electric control device is more ergonomic.

[0114] Further, the three-part design allows the injection hand tool to form a multi-zone heat dissipation. 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 hand tool. The heat generated by the motor during continuous use is transferred from the first heat dissipation space to the second heat dissipation space under the action of airflow, ensuring the normal operation of the motor in the early stage of use and prolonging the service life of the motor. When the temperature in the second heat dissipation space reaches a set temperature value, the fan automatically starts, and the heat dissipation efficiency is accelerated. Under the action of the fan, the temperature in the second heat dissipation space decreases rapidly, and the motor is preferentially cooled. 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.

[0115] This partitioned heat dissipation and multi-zone collaborative heat dissipation mode allows the injection hand tool of the present application to have high heat dissipation efficiency for the motor. In addition, during continuous use of the injection hand tool, the motor generates a large vibration. The shock absorber provided around the fan not only reduces the noise generated by the continuous operation of the motor, but also, together with the first protrusion, ensures the stability of the fan under frequent strong vibration, ensuring continuous heat dissipation. In the use scenario of long injection cycle and continuous multiple injections, the injection hand tool of the present application not only improves the heat dissipation efficiency and accelerates the heat dissipation speed, but also ensures the stability of the injection hand tool during use.

[0116] At the same time, this partitioned and graded heat dissipation mode can also reduce the influence of the motor and the fan on the electronic control device.

[0117] In the use requirement of strict injection position, under the synergistic effect of the three-part optimized space and the corresponding structure related to the limiting fan heat dissipation mechanism of the present application, the stability of the injection hand tool under strong vibration generated by the motor and the fan is maintained, thereby ensuring the injection accuracy, ensuring the safety and accuracy of injection, and also having a certain noise reduction effect.

[0118] The three-part optimized space design of the present application realizes preferential heat dissipation of the motor without significantly increasing the size of the injection hand tool, so that the motor is in a high-efficiency state. The fan used in the present application is small in size, so that the overall weight of the injection hand tool is light. The design of the temperature sensing module and the control unit allows the fan to automatically start and stop working, avoiding the fan always working. The intermittent working mode of the fan reduces the adverse effects of long-term work.

[0119] Example 2

[0120] The application also provides a tee joint quick release assembly of an injection hand tool, the injection hand tool comprising a hand tool body 14, a tee joint quick release assembly and a tee joint 7, the hand tool body 14 comprising a first cover plate 21, a fixing device 8 with a first cavity outwardly extending formed on the first cover plate, the first cavity being used for accommodating a reciprocating push rod, the fixing device 8 being provided with threads, the tee joint quick release assembly comprising a connecting part 5 and a rotating part 6.

[0121] The connecting part 5 is internally provided with threads, the connecting part 5 is threadedly connected with the fixing device 8, and the connecting part 5 is further provided with at least one mounting hole 52; the rotating part 6 is provided with threads, and the rotating part 6 is threadedly connected with the connecting part 5 through the mounting hole 52; a first end of the connecting part is inwardly recessed to form at least one accommodation space 51, and the connecting part is further internally provided with a first clamping structure, and correspondingly, a second end 73 of the tee joint is provided with at least one second clamping structure 731 corresponding to the first clamping structure, and the connecting part 5 and the tee joint 7 are clamped with each other through the first clamping structure and the second clamping structure.

[0122] When a first direction force is applied to the connecting part 5 to make the connecting part screw into the fixing device 8, a gap is left between the connecting part 5 and the fixing device 8, at this time, the connecting part 5 and the fixing device 8 are preliminarily connected; when the tee joint 7 enters the accommodation space 51 from a first angle, the second clamping structure 731 corresponds to extend into the accommodation space 51, when the tee joint is rotated to a second angle, the second clamping structure is staggered with the accommodation space, the second clamping structure and the first clamping structure are clamped with each other, at this time, the connecting part 5 and the tee joint 7 are preliminarily connected; when a second direction force is applied to the rotating part 6 to make the rotating part screw into the connecting part 5, the gap between the connecting part 5 and the fixing device 8 is reduced, at this time, the tee joint 7 is tightly connected with the fixing device 8 through the connecting part 5.

[0123] In some embodiments, the connecting part is a quick release nut, and the rotating part is a set screw.

[0124] In some embodiments, the accommodation space 51 can be a completely disconnected notch formed by completely inwardly recessing the first end of the connecting part, as shown in Figure 12 .

[0125] In other embodiments, the accommodation space can be a groove formed by partially inwardly recessing the first end of the connecting part, as long as it can play a role of accommodating the second clamping structure.

[0126] In some embodiments, the hand tool body is provided with a front end cover and a rear end cover 13 at two ends thereof, respectively, and an injection module is arranged between the front end cover and the rear end cover, the injection module comprising a liquid feeding device and a nozzle, the three-way head 7 further comprising a liquid inlet end 71 and a liquid outlet end 72, the liquid inlet end being connected to the liquid feeding device through a conduit, and the liquid outlet end being connected to the nozzle.

[0127] 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.

[0128] In some embodiments, a third fixing plate 53 is formed from the edge of the first end of the connecting portion 5 extending towards the center direction, and the third fixing plate 53 is connected to the edge of the first end of the connecting portion 5 to form a clamping groove.

[0129] In some embodiments, the first clamping structure is a clamping groove, and the second clamping structure is a buckle formed on the second end of the three-way head and protruding outward.

[0130] In other embodiments, the connecting portion comprises 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.

[0131] In some embodiments, the second connecting portion refers to a region containing the internal thread of the connecting portion, and the first connecting portion refers to a region protruding after the connecting portion is sleeved on the fixing device, which can also be a region not containing the internal thread of the connecting portion.

[0132] In some embodiments, the front end cover and the rear end cover are further provided with a motor 2, a fan 3 and an electric control device 4 in sequence in the axial direction.

[0133] In some embodiments, the distance L1 between the end of the motor and the first side of the fan is 10-30 mm.

[0134] Further, in some embodiments, the distance L1 is 20-30 mm.

[0135] In some embodiments, the distance L2 between the second side of the fan and the first end of the electric control device is 10-20 mm.

[0136] As a preferred, in some embodiments, the distance L1 is 25 mm, and the distance L2 is 15 mm.

[0137] In some embodiments, the electric control device 4 comprises a temperature sensing module 41 and a control unit, the temperature sensing module 41 comprises a first temperature detection module configured to detect a first detection temperature at a first time; a first control signal is generated when the first detection temperature is detected to be greater than a set first temperature; the control unit receives the first control signal to control the fan to automatically start at a first speed.

[0138] In other embodiments, the temperature sensing module 41 further comprises a second temperature detection module configured to detect a second detection temperature at a second time; a second control signal is generated when the second detection temperature is detected to exceed a set threshold value, and the control unit receives the second control signal to control the injection hand tool to force shutdown.

[0139] In other embodiments, when the second temperature detection module detects that the second detection temperature is less than a set second temperature, a third control signal is generated, and the control unit receives the third control signal to control the fan to stop working.

[0140] In other embodiments, the hand tool body further comprises a start switch arranged on the outer surface of the shell corresponding to the electric control device and in communication with the electric control device.

[0141] The present application provides a stable connection of tee head quick release assembly. On the one hand, the tee head can be stably connected to the injection hand tool through the tee head quick release assembly of the present application. The stable connection means that the motor will produce a larger vibration in the continuous multiple injection use scenario, at this time the tee head is fixed again on the injection hand tool through the rotating piece, which reduces the influence of motor vibration to a certain extent, and ensures the working stability of the injection hand tool. In addition, the multiple clamping design on the tee head also ensures that it can be stably connected with the injection hand tool during use. On the other hand, the tee head can be quickly disassembled through the tee head quick release assembly of the present application. In the prior art, the traditional tee head is replaced by special tools and professional personnel, and the process is complicated. The tee head quick release assembly of the present application can be quickly disassembled by loosening the rotating piece and appropriately rotating the tee head to overlap the second clamping structure thereon with the accommodating space on the connecting part. In addition, when disassembling the tee head, the infusion device filled with drug liquid is inserted into the catheter, and the one-way valve arranged in the tee head of the present application prevents the drug liquid in the infusion device from flowing into the tee head. In summary, the tee head quick release assembly of the present application not only facilitates ordinary operators to quickly disassemble the tee head, but also reduces the time cost and personnel cost of replacing the tee head, and also ensures the sealing property during disassembly, and replacing the tee head can avoid cross infection of drug liquid compared with repeated cleaning in the prior art.

[0142] Embodiment 3

[0143] The application also provides a face shell quick-release assembly of an injection hand tool, the injection hand tool comprising a hand tool main body 14, a face shell quick-release assembly, and a face shell 10, the hand tool main body comprising 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, and the face shell 10 and the face shell support 11 are connected to the first cover plate 21 through the magnetic element 12.

[0144] In some embodiments, 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 to 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 to each other through the first clamping position and the second clamping position.

[0145] In some embodiments, 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.

[0146] In some embodiments, the magnetic element is a magnet.

[0147] In some embodiments, 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.

[0148] In other embodiments, the first cover plate 21 can also be inwardly recessed to form a first convex surface and a second concave surface.

[0149] In some embodiments, the first cover plate 21 is provided with a first fixing device 8 extending outwardly and forming a first cavity for accommodating a reciprocating push rod, and the first fixing device 8 is provided with a thread; the injection hand tool further comprises a tee joint 7 and a tee joint quick release assembly, the tee joint quick release assembly comprises a connecting part 5 and a rotating part 6, the connecting part 5 is internally provided with a thread, and the connecting part 5 is threadedly connected with the first fixing device 8.

[0150] In some embodiments, 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.

[0151] In some embodiments, the connecting part is further internally provided with a first clamping structure, and correspondingly, the second end of the tee joint is outwardly protruded and formed with at least one second clamping structure 731, and the connecting part 5 and the tee joint 7 are clamped with each other through the first clamping structure and the second clamping structure.

[0152] In some embodiments, the connecting part comprises a first connecting part and a second connecting part, the first connecting part is used for forming a second cavity for the second clamping structure 731 to rotate, and the second connecting part is used for being sleeved on the first fixing device.

[0153] In some embodiments, the face shell is internally provided with a clamping plate 103, the rotating part 6 is close to the first cover plate 21, correspondingly, the inner side of the face shell support is inwardly recessed and formed with a first space, the clamping plate 103 is inwardly recessed and formed with a second space, and the first space and the second space are both used for accommodating the rotating part.

[0154] In some other embodiments, the connecting part 5 is sleeved on the first fixing device 8, that is to say, the inner diameter of the connecting part 5 is greater than or equal to the outer diameter of the first fixing device 8.

[0155] The application designs a face shell quick release assembly with stable connection. On one hand, the face shell can be stably connected to the injection hand tool through the face shell quick release assembly. Specifically, during continuous use of the injection hand tool, the motor generates a large vibration, at this time, the face shell can still be stably connected to the front end of the injection hand tool through the multiple clamping designs of the quick release assembly, and is not easy to fall off. The multiple clamping designs specifically refer to the clamping of the face shell support and the magnet, the clamping of the face shell support and the face shell, and the clamping of the face shell and the hand tool. Through the multiple clamping designs, the working stability of the face shell under the condition of frequent strong vibration is improved, and the stability of the face shell after disassembly and reassembly is also ensured, and it is not easy to produce misalignment deviation. On the other hand, the face shell can also be easily disassembled through the face shell quick release assembly. Specifically, since the face shell in the present application is connected to the hand tool through the magnetic attraction of the quick release assembly, when the applied external force is greater than the magnetic attraction force, the face shell can be disassembled. The quick release assembly designed in the present application only needs to simply apply an external force to complete the disassembly process of the face shell, so as to facilitate the replacement of the subsequent internal consumables and auxiliary materials.

[0156] It should be noted that in this document, the terms "comprise", "comprising", or any other variant thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements, but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, the element defined by the phrase "comprising a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0157] From the above description of the embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be realized by means of software and a general hardware platform, of course, they can also be realized by hardware, but in many cases, the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a plurality of instructions for making a computer terminal (which can be a mobile phone, computer, server, or network device, etc.) execute the methods described in the embodiments of the present application.

[0158] The embodiments of the present application are described above in combination with the drawings, but the present application is not limited to the above-mentioned specific embodiments, the above-mentioned specific embodiments are only illustrative, not limiting, and those skilled in the art can make many forms under the inspiration of the present application without departing from the purpose of the present application and the scope protected by the claims, which all belong to the protection of the present application.

Claims

1. An injection hand tool, characterized in that, The injection hand tool comprises a shell (1) comprising a hand tool body (14) provided with a front end cover and a rear end cover (13) at both ends respectively; an injection module, a motor (2), a fan (3) and an electric control device (4) are sequentially arranged between the front end cover and the rear end cover in the axial direction, and the electric control device (4) comprises a temperature sensing module (41) and a control unit; Wherein, a first heat dissipation space (I) is formed between the shell of the motor and the inner surface of the shell, a second heat dissipation space (II) is formed by reserving a certain space between the end of the motor and the first side of the fan, and a third heat dissipation space (III) is formed between the second side of the fan and the rear end cover; Wherein, when the motor is started, heat is generated, which 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 started; 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, 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 in the working process 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; the length L1 of the second heat dissipation space in the axial direction of the shell is 10-30 mm; the distance L2 between the second side of the fan and the first end of the electric control device is 10-20 mm; At least one first protrusion (31) is arranged on the inner surface of the shell corresponding to the fan (3) in the axial direction to facilitate the fixation of the fan, and a damping member (32) is arranged between adjacent first protrusions; Wherein, the temperature sensing module (41) comprises a first temperature detection module configured to detect a first detection temperature of the second heat dissipation space at a first time; a first control signal is generated when it is detected that the first detection temperature is greater than a set first temperature; the control unit receives the first control signal to control the fan to automatically start at a first speed.

2. The injection handpiece of claim 1, wherein, The length L1 is 20-30 mm.

3. The injection handpiece of claim 1, wherein, A plurality of wires are arranged between the motor (2) and the electric control device (4), and a wire mounting port (311) for guiding the wires is arranged on the first protrusion.

4. The injection handpiece of claim 3, wherein, The inner surface of the shell between the motor (2) and the fan (3) is provided with at least one second protrusion (231), and the inner surfaces between adjacent second protrusions are abutted to form a wire installation groove, so that the wire passes through the first protrusion along the wire installation groove and the wire installation port in turn.

5. The injection handpiece of claim 4, wherein, The temperature sensing module (41) further comprises a second temperature detection module configured to detect a second detection temperature of the second heat dissipation space at a second time; when it is detected that the second detection temperature exceeds a set threshold value, a second control signal is generated accordingly, and the control unit receives the second control signal to control the injection hand tool to force shutdown; 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.

6. The injection handpiece of claim 1, wherein, The first ventilation area is greater than the second ventilation area, so that the airflow guides the heat to flow quickly in the first heat dissipation space to the second ventilation area; the second flow rate is greater than the first flow rate.

7. The injection handpiece of claim 1, wherein, A plurality of air holes are arranged on the first ventilation area, and a plurality of heat dissipation openings are arranged on the third ventilation area, so that the airflow enters the first heat dissipation space from the air holes, and guides the heat to be discharged from the heat dissipation openings through the second heat dissipation space and the third heat dissipation space.

8. The injection hand tool of claim 1, wherein, The injection hand tool further comprises a start switch arranged on the outer surface of the shell corresponding to the electric control device and in communication with the electric control device. And / or, the first protrusion (31) comprises a first fixed plate and a second fixed plate arranged in the axial direction of the shell, and the radial height of the first fixed plate is greater than the radial height of the second fixed plate.

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