Split type sterile spraying dosing device

Abstract

The invention relates to a split type sterile spraying drug delivery device which comprises a gun body assembly and a drug bin system, and the gun body assembly and the drug bin system are detachably connected. The gun body assembly comprises a shell, a material extruding mechanism, a gas generating assembly, a wind power adjusting device and a trigger assembly. The medicine bin system comprises a medicine bin and an injector. The medicine bin can be independently detached to be sterilized or replaced, and the sterility of clinical application is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of spraying devices, in particular to a split type aseptic spraying drug delivery device. Background Art

[0002] Sterile spray applicators have a wide range of applications in the biomedical field, including drug delivery, cell therapy, and tissue engineering. Traditional sterile spray applicators usually adopt a single-body design, in which the drug reservoir and the drug delivery system are integrated into one device. However, this design has the following disadvantages:

[0003] The dosage of drug is difficult to control accurately: Single-body drug delivery devices are usually driven by gravity or air pressure, and the dosage of drug is difficult to control accurately, which may affect the treatment effect.

[0004] Difficulty in sterilization: It is difficult to completely sterilize a one-piece dispenser because the drug reservoir and delivery system cannot be completely disassembled. This may lead to microbial contamination, thus endangering patient safety.

[0005] High maintenance cost: Once a single-body applicator is damaged or contaminated, the entire device needs to be replaced, which increases maintenance costs. Summary of the invention

[0006] In view of the above problems, the purpose of the present invention is to provide a split sterile spray drug dispenser. The device adopts a split design and is divided into two parts: a power system and a medicine chamber. The power system accurately controls the spray dosage and spray particle size through a wind regulating device; the medicine chamber can be disassembled separately for sterilization or replacement to ensure the sterility of clinical applications.

[0007] To achieve the above object, the present invention adopts the following technical solutions:

[0008] The split aseptic spray applicator of the present invention comprises: a gun body assembly and a medicine chamber system, wherein the gun body assembly and the medicine chamber system are detachably connected; the gun body assembly comprises a material extrusion mechanism, a gas generating assembly, and a wind force regulating device; the medicine chamber system comprises a medicine chamber and a syringe.

[0009] The split-type sterile spray applicator preferably also includes a shell, which has a two-half structure in the shape of a gun, with a front handle and a rear handle; the extrusion mechanism is vertically fixed at the front handle of the shell; the gas generating assembly is horizontally fixed at the upper end of the shell; the wind force regulating device is fixed in the shell and is located below the gas generating assembly.

[0010] The split-type sterile spray applicator preferably further comprises a trigger device, which is used to trigger and start the gas generating component and the extrusion mechanism.

[0011] In the split-type sterile spray applicator, preferably, the trigger device is a trigger assembly, and the trigger assembly is rotatably disposed in the housing.

[0012] Among them, the trigger device can be in various forms such as click type, trigger type, etc.

[0013] The split-type sterile spray drug dispenser is preferably configured such that the medicine chamber is detachably connected to the front end of the shell via a medicine chamber connecting structure; the outlet ends of several syringes are detachably connected to the bottom of the medicine chamber, and their piston ends are detachably connected to the extrusion mechanism; the medicine chamber includes a medicine chamber body and a nozzle mechanism connected to the medicine chamber body; a mixing channel is provided in the nozzle mechanism; a drug administration channel is provided in the medicine chamber body, and the drug administration channel includes several branch channels respectively connected to the syringes, and the several branch channels are connected to the mixing channel in the nozzle mechanism after merging into a main channel.

[0014] The split-type sterile spray applicator preferably further comprises a nozzle, which is disposed in the mixing channel and communicated with the mixing channel. Preferably, the nozzle can be integrally formed with the nozzle mechanism, and the nozzle mechanism is integrally formed on the medicine chamber body. Alternatively, external nozzles of different forms and shapes can be added as needed to meet the needs of different scenarios.

[0015] In the split-type sterile spray applicator, preferably, the medicine bin connection structure is a snap connection, a magnetic connection, a threaded bolt connection or a plug-in connection.

[0016] The split-type sterile spray applicator, preferably, the snap-on connection includes a spring, a snap and a rotating shaft; a groove is provided on the side wall of the shell; a spring is provided between the first end of the snap and the side wall of the medicine bin, the middle part of the snap is movably connected to the medicine bin through a rotating shaft, and the second end of the snap is snapped into the groove of the shell; the snap is divided into two groups, which are respectively provided on both sides of the medicine bin.

[0017] The split-type sterile spray applicator preferably further comprises a locator structure, and the locator structure is arranged between the shell and the medicine chamber.

[0018] The split-type sterile spray applicator is preferably configured such that the locator structure is a locating block; a locating groove is provided at the rear end of the medicine chamber; the locating block is provided at the front end of the shell, and when the locating block is docked with the locating groove, the shell and the medicine chamber are positioned; and / or the locator structure is a magnet; a magnet is respectively provided at the front end of the shell and the rear end of the medicine chamber, and when the two magnets attract each other, the shell and the medicine chamber are positioned.

[0019] The split-type sterile spray applicator preferably comprises: an extrusion mechanism; a micro-stepping screw motor fixedly mounted on the extrusion base; a slider threadedly connected to the screw of the micro-stepping screw motor and capable of sliding under the drive of the screw of the micro-stepping screw motor; a linear guide rail arranged parallel to the screw of the micro-stepping screw motor and fixedly mounted on the extrusion base, and the slider slides on the linear guide rail; a driving circuit board fixedly arranged at the bottom of the extrusion base, a photoelectric sensor being arranged on the driving circuit board, and the photoelectric sensor being used to detect the original position and maximum stroke position of the slider; a sample needle seat fixedly connected to the slider, the sample needle seat being used to lock the piston rod of the syringe and drive the piston rod of the syringe to reciprocate under the action of the micro-stepping screw motor and the slider.

[0020] The split-type sterile spray applicator, preferably, the sample needle seat comprises a sample needle seat base, a sample needle cover and a sample needle seat rotating shaft; the sample needle cover is connected to the sample needle seat base via the sample needle seat rotating shaft so that the sample needle cover can be openably arranged on the sample needle seat base, and when the sample needle cover is closed, the piston rod of the syringe is locked by the sample needle cover and the sample needle seat base.

[0021] The split-type sterile spray dispenser preferably further comprises a display screen and a power supply assembly; the display screen is connected to the rear end of the housing and is used to set the parameters of the extrusion program and / or wind force adjustment; the power supply assembly is arranged at the rear handle position of the housing and is used to power the whole machine. The sterile spray dispenser can be provided with a touch screen according to different scenarios.

[0022] The split-type sterile spray applicator, preferably, the gas generating assembly includes an air duct, a duct fan and a fan driving plate; the air outlet of the air duct is of a constricted design; the duct fan is fixedly arranged at the rear of the air duct to provide high-speed airflow; the fan driving plate is fixed at the bottom of the air duct to drive the duct fan; when the medicine bin is connected to the outer casing, the air outlet of the air duct is connected to the mixing channel.

[0023] The split-type sterile spray applicator is preferably configured such that the bottom of the air duct has an arc-shaped surface, and the angle between the tangent of the arc-shaped surface and the horizontal plane is 20°-30°.

[0024] The split-type sterile spray applicator, preferably, the wind force regulating device includes a wind force regulator and a wind force regulating lever; the wind force regulator is fixed to the casing and electrically connected to the fan drive plate; the wind force regulating lever is connected to the wind force regulator so that the wind force can be adjusted when the wind force regulating lever is turned; or, the wind force regulator is electrically connected to the display screen to display and control the wind force through the display screen.

[0025] The split-type sterile spray dispenser preferably has a trigger assembly comprising a trigger, a microswitch, a trigger optical axis and a torsion spring; one end of the trigger optical axis is fixed to the housing, and the other end passes through the trigger so that the trigger can rotate around the trigger optical axis; the microswitch is arranged at the rear end of the trigger, and the microswitch has a spring trigger sheet, and the microswitch is electrically connected to the micro stepping screw motor and the fan drive board; the trigger is pulled to hit the spring trigger sheet, thereby triggering an inkjet signal; the torsion spring is sleeved on the trigger optical axis, one end of which is fixed to the housing, and the other end is fixed to the trigger, so as to provide power for resetting the trigger.

[0026] The present invention adopts the above technical solution, which has the following advantages:

[0027] (1) The split drug chamber design enables the drug chamber to be detachable and replaceable, and sterilized separately, greatly reducing the clinical use cost of the device;

[0028] (2) The easily detachable connection between the cartridge chamber and the gun body facilitates the removal and installation of the cartridge chamber, thereby improving the portability of the equipment.

[0029] (3) Reduce turbulence and pressure loss and improve fan efficiency through the design of the air duct structure.

[0030] (4) The internal piping design of the medicine chamber ensures that the two liquids are mixed evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the following detailed description of the preferred embodiment.The drawings are only for the purpose of illustrating the preferred embodiments and are not to be construed as limiting the invention.

[0032] Throughout the drawings, the same reference numerals are used to denote the same components. In the drawings:

[0033] Figure 1 It is a schematic diagram of the external structure of the split-type sterile spray applicator of the present invention;

[0034] Figure 2 It is a schematic diagram of the internal structure of the split-type sterile spray applicator of the present invention;

[0035] Figure 3 It is a schematic diagram of the connection structure between the medicine bin and the shell of the split-type sterile spray drug dispenser of the present invention;

[0036] Figure 4 It is a schematic diagram of the drug delivery channel structure of the drug storage of the split-type sterile spray drug delivery device of the present invention;

[0037] Figure 5 It is a three-dimensional structural schematic diagram of the extrusion mechanism of the split-type sterile spraying device of the present invention;

[0038] Figure 6 It is a schematic diagram of the main structure of the extrusion mechanism of the split-type sterile spraying device of the present invention;

[0039] Figure 7 It is a structural schematic diagram of the sample needle seat of the split-type sterile spray applicator of the present invention, wherein the sample needle cover is in an open state;

[0040] Figure 8 It is a structural schematic diagram of the sample needle seat of the split-type sterile spray applicator of the present invention, wherein the sample needle cover is in a closed state;

[0041] Fig. 9 It is a three-dimensional structural schematic diagram of the gas generating assembly of the split-type sterile spraying device of the present invention;

[0042] Fig.10 It is a schematic cross-sectional view of the gas generating assembly of the split-type sterile spraying device of the present invention;

[0043] Fig.11 It is a three-dimensional structural schematic diagram of the trigger assembly of the split-type sterile spray applicator of the present invention;

[0044] Fig.12 It is a schematic diagram of the main structure of the trigger assembly of the split-type sterile spray medication dispenser of the present invention;

[0045] Fig.13 It is a schematic diagram of the structure of the power supply assembly of the split-type sterile spray dispenser of the present invention;

[0046] Fig.14 This is a wind speed simulation diagram of the present invention when the air duct contracts at an angle of 90°;

[0047] Fig.15 This is a wind speed simulation diagram of the present invention when the air duct contraction angle is 30°;

[0048] Fig.16 This is a wind speed simulation diagram of the air duct contraction angle of 20° of the present invention.

[0049] The reference numerals in the figures are as follows:

[0050] 1-split aseptic spray dispenser; 1-1-housing; 1-2-extrusion mechanism; 1-201-extrusion base; 1-202-micro stepping screw motor; 1-203-linear guide; 1-204-slider; 1-205-driving circuit board; 1-2051-photoelectric sensor; 1-206-sample needle seat; 1-2061-sample needle seat base; 1-2062-sample needle cover; 1-2063-sample needle seat shaft; 1-3-syringe; 1-4-drug chamber; 1-401-drug chamber body; 1-4011-drug administration channel; 1-402-nozzle mechanism; 1-403-nozzle; 1-5-gas generating assembly; 1-501-air duct; 1-502-ducted fan; 1-503-fan drive plate; 1-6-wind speed regulating device; 1-601-wind speed regulator; 1-602-wind speed regulating lever; 1-7-trigger assembly; 1-701-trigger; 1-702-micro switch; 1-703-trigger optical axis; 1-704-torsion spring; 1-8-display screen; 1-9-power supply assembly; 1-901-battery tray; 1-902-battery; 1-903-battery shrapnel; 1-904-battery buckle; 1-10-medicine chamber connection structure; 1-1001-spring; 1-1002-clip; 1-1003-rotating shaft; 1-11-magnet; 1-12-positioning block. DETAILED DESCRIPTION

[0051] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0052] The present invention provides a split-type sterile spray drug delivery device, which greatly reduces the clinical use cost of the device by designing the drug bin to be detachable and sterilized separately, and facilitates the disassembly and installation of the drug bin, thereby improving the portability of the device.

[0053] like Figure 1 and Figure 2 As shown, the split-type aseptic spray medication dispenser 1 provided by the present invention comprises: a gun body assembly and a medicine chamber system, and the gun body assembly and the medicine chamber system are detachably connected.

[0054] In the above embodiment, preferably, the gun body assembly includes: a shell 1-1, having a gun-shaped two-half structure with a front handle and a rear handle; a material extrusion mechanism 1-2, vertically fixedly arranged at the front handle of the shell 1-1; a gas generating assembly 1-5, horizontally fixed at the upper end of the shell 1-1; a wind force adjustment device 1-6, fixedly arranged in the shell 1-1 and located below the gas generating assembly 1-5; a trigger assembly 1-7, rotatably arranged in the shell 1-1, for starting the gas generating assembly 1-5 and the material extrusion mechanism 1-2. Of course, the trigger assembly can be replaced with a different trigger device, such as a point trigger device.

[0055] In the above embodiments, preferably, the medicine chamber system includes a medicine chamber 1-4 and a syringe 1-3; the medicine chamber 1-4 is detachably connected to the front end of the housing 1-1 through a medicine chamber connecting structure 1-10; the outlet ends of several syringes 1-3 are respectively detachably connected to the bottom of the medicine chamber 1-4 (threaded connection in this embodiment, of course, plug-in or other detachable connection methods can also be used), and their piston ends are respectively detachably connected to the extrusion mechanism 1-2.

[0056] like Figure 2 As shown, the medicine chamber 1-4 includes a medicine chamber body 1-401 and a nozzle mechanism 1-402 connected to the medicine chamber body 1-401; a mixing channel is provided in the nozzle mechanism 1-402, and a drug administration channel 1-4011 is provided in the medicine chamber body 1-401 (see Figure 4 ), the dosing channel 1-4011 includes a plurality of branch channels respectively connected to the syringe 1-3, and the plurality of branch channels merge into a main channel and are connected to a mixing channel in the nozzle mechanism 1-402.

[0057] It should be noted that there are two branch channels in this embodiment, and the two branch channels are smooth arc-shaped channels. The channel at the intersection is designed with an arc and streamlined shape, thereby ensuring a smooth transition at the intersection to reduce turbulence and pressure loss; the two branch channels are symmetrically designed to ensure uniform distribution of the fluid; the tangent angle of the two branch channels is 90 degrees, thereby further reducing fluid impact.

[0058] In the above embodiment, preferably, the present invention further comprises a nozzle 1-403, preferably, the nozzle 1-403 is disposed in the mixing channel and communicated with the mixing channel, preferably, the nozzle can be integrally formed with the nozzle mechanism, preferably, the nozzle mechanism is integrally formed with the medicine chamber body 1-401. Alternatively, external nozzles of different forms and shapes can be added as needed to meet the needs of different scenarios.

[0059] In the above embodiments, preferably, the medicine chamber connection structure is a snap connection, a magnetic connection, a threaded bolt connection or a plug-in connection.

[0060] In the above embodiment, preferably, Figure 3 As shown, the medicine chamber connection structure 1-10 connected by snap-fitting includes a spring 1-1001, a snap 1-1002 and a rotating shaft 1-1003; a groove is provided on the side wall of the outer shell 1-1; a spring is provided between the first end of the snap 1-1002 and the side wall of the medicine chamber 1-4, the middle part of which is movably connected to the medicine chamber 1-4 through the rotating shaft 1-1003, and the second end of which is snapped into the groove of the outer shell 1-1.

[0061] In the above embodiment, preferably, the buckles are in two groups, which are respectively arranged on both sides of the medicine bins 1-4.

[0062] In the above embodiments, preferably, the present invention further comprises a locator structure, and the locator structure is arranged between the housing and the medicine chamber.

[0063] In the above embodiment, preferably, Figure 2 As shown, the present invention further includes a positioning block 1-12; a positioning groove is provided at the rear end of the medicine bin 1-4; a positioning block 1-12 is provided at the front end of the housing 1-1, and when the positioning block 1-12 is docked with the positioning groove, the housing 1-1 and the medicine bin 1-4 are positioned;

[0064] And / or the positioner structure is a magnet 1-11, such as Figure 3 As shown, a magnet 1-11 is respectively provided at the front end of the shell 1-1 and the rear end of the medicine chamber 1-4, and when the two magnets 1-11 attract each other, the shell 1-1 and the medicine chamber 1-4 are positioned.

[0065] In the above embodiment, preferably, Figure 5 and Figure 6 As shown, the extrusion mechanism 1-2 includes: an extrusion base 1-201; a micro-stepping screw motor 1-202, which is fixedly arranged on the extrusion base 1-201; a slider 1-204, which is threadedly connected to the screw of the micro-stepping screw motor 1-202 and can slide under the drive of the screw of the micro-stepping screw motor 1-202; a linear guide 1-203, which is arranged parallel to the screw of the micro-stepping screw motor 1-202 and is fixedly installed on the extrusion base 1-201, and the slider 1-204 slides on the linear guide 1-203 movement; a driving circuit board 1-205, which is fixedly arranged at the bottom of the extrusion base 1-201, and a photoelectric sensor 1-2051 is arranged on the driving circuit board 1-205, and the photoelectric sensor 1-2051 is used to detect the original position and the maximum stroke position of the slider 1-204; a sample needle seat 1-206, which is fixedly connected to the slider 1-204, and the sample needle seat 1-206 is used to lock the piston rod of the syringe 1-3, and drive the piston rod of the syringe 1-3 to reciprocate under the action of the micro stepping screw motor 1-202 and the slider 1-204.

[0066] In the above embodiment, preferably, Figure 7 and Figure 8 As shown, the sample needle seat 1-206 includes a sample needle seat base 1-2061, a sample needle cover 1-2062 and a sample needle seat rotating shaft 1-2063; the sample needle cover 1-2062 is connected to the sample needle seat base 1-2061 through the sample needle seat rotating shaft 1-2063, so that the sample needle cover 1-2062 can be openably arranged on the sample needle seat base 1-2061, and when the sample needle cover 1-2062 is closed, the piston rod of the syringe 1-3 is locked by the sample needle cover 1-2062 and the sample needle seat base 1-2061.

[0067] In the above embodiment, preferably, Figure 2 As shown, the present invention also includes a display screen 1-8 and a power supply assembly 1-9; the display screen 1-8 is connected to the rear end of the housing 1-1, and is used to set the parameters of the extrusion program and / or wind force adjustment; the power supply assembly 1-9 is set at the rear handle position of the housing 1-1, and is used to power the whole machine. Of course, the sterile spray dispenser can choose whether to set a touch screen according to different scenarios.

[0068] In the above embodiment, preferably, Fig. 9 and Fig.10 As shown, the gas generating assembly 1-5 includes an air duct 1-501, a ducted fan 1-502 and a fan driving plate 1-503; the air outlet of the air duct 1-501 is a tapered design; the ducted fan 1-502 is fixedly arranged at the rear of the air duct 1-501 to provide high-speed airflow; the fan driving plate 1-503 is fixed at the bottom of the air duct 1-501 to drive the ducted fan 1-502; when the medicine chamber 1-4 is connected to the outer shell 1-1, the air outlet of the air duct 1-501 is connected to the mixing channel.

[0069] In the above embodiment, preferably, Fig.10 As shown, the bottom of the air duct 1-501 has an arc-shaped surface, and the angle between the tangent of the arc-shaped surface and the horizontal plane is 20°-30°.

[0070] In the above embodiment, preferably, Fig. 9 As shown, the wind force regulating device 1-6 includes a wind force regulator 1-601 and a wind force regulating lever 1-602; the wind force regulator 1-601 is fixed to the housing 1-1 and is electrically connected to the fan drive plate 1-503; the wind force regulating lever 1-602 is connected to the wind force regulator 1-601 so that the wind force can be adjusted when the wind force regulating lever 1-602 is turned; or, the wind force regulator 1-601 is electrically connected to the display screen 1-8, and the wind force is displayed and controlled through the display screen 1-8.

[0071] In the above embodiment, preferably, Fig.11 and Fig.12As shown, the trigger assembly 1-7 includes a trigger 1-701, a micro switch 1-702, a trigger optical axis 1-703 and a torsion spring 1-704; one end of the trigger optical axis 1-703 is fixed to the housing 1-1, and the other end passes through the trigger 1-701, so that the trigger 1-701 can rotate around the trigger optical axis 1-703; the micro switch 1-702 is arranged at the rear end of the trigger 1-701, and the micro switch 1-702 has a spring trigger sheet, and the micro switch 1-702 is electrically connected to the micro stepping screw motor 1-202 and the fan drive plate 1-503; the trigger 1-701 is pulled to hit the spring trigger sheet, thereby triggering the inkjet signal; the torsion spring 1-704 is mounted on the trigger optical axis 1-703, one end of which is fixed to the housing 1-1, and the other end is fixed to the trigger 1-701, so as to provide power for resetting the trigger 1-701.

[0072] In the above embodiment, preferably, Fig.13 As shown, the power supply assembly 1-9 includes a battery tray 1-901, a battery 1-902, a battery spring 1-903 and a battery clip 1-904; the battery tray 1-901 has a cavity for accommodating the battery 1-902; the battery spring 1-903 is fixedly arranged inside the battery tray 1-901, and is used to connect several batteries 1-902 in series; the battery 1-902 is detachably arranged in the battery tray 1-901; the battery tray 1-901 is connected to the first shell 1-1 through the battery clip 1-904 to achieve snap-on and loosening.

[0073] in, Fig.14 This is a wind speed simulation diagram of the present invention when the air duct contracts at an angle of 90°; Fig.15 This is a wind speed simulation diagram of the present invention when the air duct contraction angle is 30°; Fig.16 This is a wind speed simulation diagram of the duct contraction angle of 20° of the present invention. The simulation diagram shows that when the fan air pressure is 0.2MPa and the contraction angles are 90°, 30°, and 20°, the average air flow speed at the duct outlet is 466.97m / s, 528.65m / s, and 532.34m / s, respectively. When the angle is less than 20°, the duct structure is too long and unreasonable. It can be seen that considering the duct shape and aerodynamic factors, the gradual contraction of the contraction section angle of 20°-30° can reduce turbulence and resistance losses and obtain the maximum outlet air speed.

[0074] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A split type sterile spray applicator, characterized in that: include: A gun body assembly and a medicine chamber system, wherein the gun body assembly and the medicine chamber system are detachably connected; the gun body assembly comprises a material extrusion mechanism, a gas generating assembly, and a wind force regulating device; the medicine chamber system comprises a medicine chamber and a syringe.

2. The split type sterile spray applicator according to claim 1, characterized in that: Also included is a housing having a front handle and a rear handle in a two-half gun-shaped structure; The extrusion mechanism is vertically fixedly arranged on the front handle of the housing; The gas generating assembly is horizontally fixed to the upper end of the housing; The wind force regulating device is fixedly arranged in the shell and is located below the gas generating assembly.

3. The split type sterile spray applicator according to claim 2, characterized in that: It also includes a trigger device, which is used to trigger and start the gas generating component and the extruding mechanism.

4. The split type sterile spray applicator according to claim 3, characterized in that: The trigger device is a trigger assembly, and the trigger assembly is rotatably arranged in the shell.

5. The split type sterile spray applicator according to claim 4, characterized in that: The medicine bin is detachably connected to the front end of the housing through a medicine bin connection structure; the outlet ends of the plurality of syringes are detachably connected to the bottom of the medicine bin, and the piston ends thereof are detachably connected to the extrusion mechanism; The medicine bin comprises a medicine bin body and a nozzle mechanism connected to the medicine bin body; A mixing channel is provided in the nozzle mechanism; The medicine chamber body is provided with a drug administration channel, which includes a plurality of branch channels respectively connected with the syringes, and the plurality of branch channels are connected with the mixing channel in the nozzle mechanism after merging into a main channel.

6. The split type sterile spray applicator according to claim 5, characterized in that: It also includes a nozzle, which is arranged in the mixing channel and communicated with the mixing channel. Preferably, the nozzle mechanism is integrally formed on the medicine chamber body.

7. The split type sterile spray applicator according to claim 5, characterized in that: The medicine bin connection structure is a snap connection, a magnetic connection, a threaded bolt connection or a plug-in connection.

8. The split type sterile spray applicator according to claim 7, characterized in that: The buckle connection includes a spring, a buckle and a rotating shaft; A groove is provided on the side wall of the shell; A spring is arranged between the first end of the buckle and the side wall of the medicine bin, the middle part of the buckle is movably connected with the medicine bin via a rotating shaft, and the second end of the buckle is clamped in the groove of the housing; The buckles are divided into two groups, which are respectively arranged on two sides of the medicine bin.

9. The split-type sterile spray applicator according to any one of claims 1 to 8, characterized in that: It also includes a locator structure, which is arranged between the shell and the medicine chamber.

10. The split type sterile spray applicator according to claim 9, characterized in that: The positioner structure is a positioning block; the rear end of the medicine bin is provided with a positioning groove; The front end of the shell is provided with the positioning block, and when the positioning block is docked with the positioning groove, the shell and the medicine chamber are positioned; and / or the locator structure is a magnet; A magnet is respectively arranged at the front end of the shell and the rear end of the medicine bin, and when the two magnets attract each other, the shell and the medicine bin are positioned.

11. The split type sterile spray applicator according to claim 5, characterized in that: The extrusion mechanism comprises: Extrusion base; A micro stepping screw motor is fixedly arranged on the extrusion base; A slider is threadedly connected to the screw of the micro-stepping screw motor and can slide under the drive of the screw of the micro-stepping screw motor; A linear guide rail is arranged parallel to the screw of the micro-stepping screw motor and is fixedly mounted on the extrusion base, and the slider slides on the linear guide rail; A driving circuit board is fixedly arranged at the bottom of the extrusion base, and a photoelectric sensor is arranged on the driving circuit board, and the photoelectric sensor is used to detect the original position and the maximum stroke position of the slider; The sample needle seat is fixedly connected to the slider, and is used to lock the piston rod of the syringe and drive the piston rod of the syringe to reciprocate under the action of the micro-stepping screw motor and the slider.

12. The split type sterile spray applicator according to claim 11, characterized in that: The sample needle seat comprises a sample needle seat base, a sample needle cover and a sample needle seat rotating shaft; The sample needle cover is connected to the sample needle seat base through a sample needle seat rotating shaft so that the sample needle cover can be openably arranged on the sample needle seat base. When the sample needle cover is closed, the piston rod of the syringe is locked by the sample needle cover and the sample needle seat base.

13. The split type sterile spray applicator according to claim 11, characterized in that: It also includes a display screen and a power supply assembly; the display screen is connected to the rear end of the housing and is used to set the parameters of the extrusion program and / or wind force adjustment; The power supply assembly is arranged at the rear handle position of the housing and is used to supply power to the entire machine.

14. The split type sterile spray applicator according to claim 13, characterized in that: The gas generating assembly includes an air duct, a duct fan and a fan driving plate; The air outlet of the air duct is designed as a shrinkage outlet; The duct fan is fixedly arranged at the rear of the air duct to provide high-speed airflow; The fan driving plate is fixed to the bottom of the air duct and is used to drive the duct fan; When the medicine bin is connected to the housing, the air outlet of the air duct is communicated with the mixing channel.

15. The split type sterile spray applicator according to claim 14, characterized in that: The bottom of the air duct has an arc-shaped surface, and the angle between the tangent of the arc-shaped surface and the horizontal plane is 20°-30°.

16. The split type sterile spray applicator according to claim 14, characterized in that: The wind force regulating device comprises a wind force regulator and a wind force regulating lever; The wind force regulator is fixed to the housing and electrically connected to the fan drive plate; The wind force adjustment lever is connected to the wind force regulator, so that the wind force can be adjusted when the wind force adjustment lever is turned; Alternatively, the wind force regulator is electrically connected to the display screen, and the wind force is displayed and controlled via the display screen.

17. The split type sterile spray applicator according to claim 14, characterized in that: The trigger assembly includes a trigger, a micro switch, a trigger optical axis and a torsion spring; One end of the trigger optical axis is fixed to the housing, and the other end passes through the trigger, so that the trigger can rotate around the trigger optical axis; The micro switch is arranged at the rear end of the trigger, and the micro switch has a spring trigger sheet, and the micro switch is electrically connected to the micro stepping screw motor and the fan drive board; The trigger is pulled to hit the spring trigger piece, thereby triggering an inkjet signal; The torsion spring is sleeved on the trigger optical axis, one end of the torsion spring is fixed to the housing, and the other end is fixed to the trigger to provide power for resetting the trigger.

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