Hand-held gun capable of adjusting back-suction liquid flow

Abstract

The utility model relates to the field of medical instruments, in particular to a handheld gun with adjustable resorption liquid flow, which comprises a handle, a flushing channel and a resorption channel are arranged in the handle, liquid is ejected to a target tissue from the flushing channel, and the liquid at the target tissue is resorbed through negative pressure in the resorption channel; a back-suction adjusting mechanism is arranged on the handle, the back-suction adjusting mechanism comprises a piston and a back-suction adjusting seat, an air hole channel is formed in the piston, an exhaust hole communicated with the outside is formed in the handle, and the air hole channel is communicated with the back-suction channel; and when the piston slides to different positions in the back suction adjusting seat, the exhaust holes are partially or completely communicated with the air hole channel or are not communicated with the air hole channel. And the back suction flow can be easily adjusted by adjusting the position of the piston. The scheme is simple to operate, can be realized by a single hand, is economical and environment-friendly in overall structure, can be disposable, can be repeatedly disinfected at high temperature, and is not easy to damage.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a hand-held gun with adjustable aspiration liquid flow rate. Background Art

[0002] During or after the flushing of the surgical site during the operation, sometimes it is necessary to aspirate the flushing liquid and residual human tissues or other objects at the surgical site in a timely manner according to the situation. According to the amount of the flushing liquid or other objects at the surgical site, it is necessary to adjust the aspiration flow rate of the flushing gun, that is, it is necessary to effectively adjust the aspiration volume or aspiration pressure in a timely manner according to the situation, and also ensure the convenience of use during the operation. If the flow rate is too large, excessive negative pressure will be caused to the surgical site. If the flow rate is too small, the flushing liquid or other objects will be filled or even overflowed.

[0003] At present, similar products all regulate the aspiration negative pressure through an electric control method to achieve the purpose of adjusting the aspiration flow rate. Such products require wiring the handle to the device, which will cause some inconveniences during the operation process and the cost will also increase accordingly; or the electric control device is installed in the flushing gun, which will pose a safety hazard. If it is a repeatedly used flushing gun, disinfection and maintenance are relatively difficult. Summary of the Invention

[0004] To solve the above-mentioned problems of the prior art, the utility model provides a hand-held gun with adjustable aspiration liquid flow rate, which includes a handle. A flushing channel and an aspiration channel are arranged in the handle. The liquid is emitted from the flushing channel to the target tissue, and the liquid at the target tissue is aspirated through the negative pressure in the aspiration channel.

[0005] An aspiration adjustment mechanism is arranged on the handle. The aspiration adjustment mechanism includes a piston and an aspiration adjustment seat. An air hole channel is arranged on the piston. An exhaust hole communicating with the outside is arranged on the handle. The air hole channel is communicated with the aspiration channel.

[0006] When the piston slides to different positions in the aspiration adjustment seat, part or all or none of the exhaust hole communicates with the air hole channel.

[0007] Preferably, the aspiration adjustment mechanism includes an aspiration minus trigger and an aspiration plus trigger. The aspiration plus trigger is connected with the piston. The aspiration minus trigger and the aspiration plus trigger are directly connected by rolling through an aspiration gear.

[0008] When the aspiration minus trigger is pressed, the aspiration plus trigger drives the piston to move in the opposite direction relative to the aspiration minus trigger. At this time, part or all of the exhaust hole communicates with the air hole channel, and the aspiration flow rate decreases or there is no aspiration.

[0009] When the aspiration plus trigger is pressed, the aspiration plus trigger drives the piston to move. At this time, the exhaust hole and the air hole channel are partially or not connected, and the aspiration flow rate increases.

[0010] Preferably, the aspiration plus trigger and the piston are integrally formed, and a rack is provided on the surface of the aspiration plus trigger, and the rack meshes with the aspiration gear.

[0011] Preferably, an aspiration channel air hole is further provided on the piston, and the aspiration channel air hole is communicated with the air hole channel. When the piston moves, the aspiration channel air hole is completely, partially or completely communicated with the exhaust hole.

[0012] Preferably, a flow rate adjusting mechanism is further provided in the handle. The flow rate adjusting mechanism includes a pressing member, and a flushing hose is provided in the flushing channel;

[0013] The pressing member presses against the outer wall of the flushing hose. By adjusting the positional relationship between the pressing member and the outer wall of the flushing hose, the flushing flow rate is adjusted due to different degrees of extrusion of the flushing hose.

[0014] Preferably, the flow rate adjusting mechanism further includes a flushing adjusting knob. The flushing adjusting knob is rotatably connected to the handle. The pressing member is threadedly connected to the flushing adjusting knob. A liquid inlet channel is provided in the handle. The flushing hose is located in the liquid inlet channel. Rotating the flushing adjusting knob drives the pressing member to press the flushing hose to achieve flow rate adjustment.

[0015] Preferably, a part of the flushing adjusting knob is exposed from the bent part of the hand-held gun.

[0016] Preferably, a fixing column is fixedly provided in the handle. The pressing member is a bolt with a hole. The outer surface of the fixing column is threadedly connected to the bolt with a hole. The outer surface of the bolt with a hole is threadedly connected to the flushing adjusting knob;

[0017] The fixing column and the bolt with a hole are both provided with holes in the radial direction. The flushing hose passes through the fixing column and the bolt with a hole along the holes;

[0018] By rotating the flushing adjusting knob, the bolt with a hole moves along the axial direction of the fixing column, thereby squeezing the flushing hose to different degrees.

[0019] Preferably, a sediment trap is provided in the aspiration adjusting seat. The sediment trap divides the aspiration channel into upper and lower sections. The sediment trap includes a U-shaped aisle and a sediment part. The two ends of the U-shaped aisle are respectively communicated with the upper and lower sections of the aspiration channel. The sediment part is communicated with the bent part of the U-shaped aisle.

[0020] Preferably, the U-shaped aisle is arranged horizontally, and the material sinking part is arranged vertically.

[0021] Beneficial effects: Compared with the traditional medical flushing gun, this solution can easily achieve the function of adjustable backflow flow rate by a single person with one hand. The overall structure is not only small, light and easy to operate, but also a pure mechanical structure without any electronic components, which is not only safe and environmentally friendly; even if it is used repeatedly, it can be sterilized by high temperature repeatedly without affecting the structure itself, greatly reducing costs. Description of the Drawings

[0022] Figure 1 Is a three-dimensional view of the hand-held gun with adjustable backflow liquid flow rate provided by the present invention;

[0023] Figure 2 Provided by the present invention Figure 1 Cross-sectional view;

[0024] Figure 3 Provided by the present invention Figure 1 Partial cross-sectional view of the side view;

[0025] Figure 4 Is a partial enlarged view of A-A in the state of small flushing flow rate provided by the present invention;

[0026] Figure 5 Is a three-dimensional view in the state of small flushing flow rate provided by the present invention;

[0027] Figure 6 Is a partial enlarged view of A-A in the state of large flushing flow rate provided by the present invention;

[0028] Figure 7 Is a three-dimensional view in the state of large flushing flow rate provided by the present invention;

[0029] Figure 8 Is a cross-sectional view in the state of maximum backflow flow rate provided by the present invention.

[0030] Reference numerals: 1. Handle; 2. Replaceable gun head; 3. Flushing hose; 4. Fixed column; 5. Flushing adjustment knob; 6. Backflow reduction trigger; 7. Backflow increase trigger; 8. Flushing-backflow connector; 8-1. Backflow channel joint; 8-2. Flushing channel joint; 9. Air hole channel; 9-1. Backflow channel air hole; 10. Backflow gear; 11. Backflow adjustment seat; 11-1. U-shaped aisle; 11-2. Material sinking trap; 11-3. Exhaust hole; 12. Bolt with hole; 13. Backflow channel. Detailed Embodiments

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0032] Referring Figure 1 、 Figure 2 and Figure 8 As shown, the embodiment of the present utility model provides a hand-held gun with adjustable backflow liquid flow rate, including a handle 1. A flushing channel and a backflow channel 13 are provided inside the handle 1. Liquid is ejected from the flushing channel to the target tissue, and the liquid at the target tissue is sucked back through the negative pressure in the backflow channel 13. A backflow adjustment mechanism is provided on the handle 1. The backflow adjustment mechanism includes a piston and a backflow adjustment seat 11. An air hole channel 9 is provided on the piston. An exhaust hole 11-3 communicating with the outside is provided on the handle 1. The air hole channel 9 communicates with the backflow channel 13. When the piston slides to different positions in the backflow adjustment seat 11, part or all or none of the exhaust hole 11-3 communicates with the air hole channel 9.

[0033] During the surgical process or after the surgery, when it is necessary to use the flushing gun, first connect the backflow channel 13 and the flushing channel on the handle 1 to a negative pressure recovery box and a positive pressure liquid bag respectively. Under the pressure of the positive pressure liquid bag or driven by external pressurization or a peristaltic pump, the flushing liquid in the positive pressure liquid bag is pressed into the flushing channel, and the flushing liquid is ejected from the flushing channel at high pressure to the target tissue to clean the wound. The backflow channel 13 sucks back the liquid and objects at the target tissue under the negative pressure of the negative pressure recovery box. Since the air hole channel 9 is provided on the piston and the air hole channel 9 communicates with the backflow channel 13, under the action of negative pressure suction, a suction negative pressure will be generated both in the backflow channel 13 and in the air hole channel 9.

[0034] By moving the position of the piston, when the piston moves to the innermost position, the air hole channel 9 is completely communicated with the exhaust hole 11-3, that is, the air hole channel 9 is maximally communicated with the outside, which will greatly reduce or even completely offset the negative pressure of the breathing pipe at the end of the handle 1, so that the backflow channel 13 cannot normally or slightly suck back the flushing liquid. On the contrary, when the piston moves to the outermost position in neutral, the air hole channel 9 does not communicate with the exhaust hole 11-3. At this time, the suction negative pressure acts completely on the backflow channel 13, and normal suction or maximum flow suction is carried out. Therefore, the closer the piston is to the inside of the handle 1, the smaller the backflow volume or even no backflow, and vice versa, the larger the backflow volume.

[0035] Preferably, the back suction adjustment mechanism includes a back suction reduction trigger 6 and a back suction increase trigger 7. The back suction increase trigger 7 is connected to the piston, and the back suction reduction trigger 6 and the back suction increase trigger 7 are directly connected by rolling through a back suction gear 10. When the back suction reduction trigger 6 is pressed, the back suction increase trigger 7 will drive the piston to move in the opposite direction relative to the back suction reduction trigger 6. At this time, the exhaust hole 11-3 and the air hole channel 9 are partially or completely connected, and the back suction flow rate decreases or there is no back suction. When the back suction increase trigger 7 is pressed, the back suction increase trigger 7 will drive the piston to move. At this time, the exhaust hole 11-3 and the air hole channel 9 are partially or not connected, and the back suction flow rate increases.

[0036] During use, hold the handle 1 with the hand, and press the back suction increase trigger 7 and the back suction reduction trigger 6 with the index finger and middle finger respectively. When the index finger exerts force to press the back suction increase trigger 7, under the action of the back suction gear 10, the back suction reduction trigger 6 will move in the opposite direction to bring out the piston. At this time, the connection amount between the air hole channel 9 and the exhaust hole 11-3 will decrease, thereby increasing the back suction flow rate. On the contrary, when the middle finger exerts force to press the back suction reduction trigger 6, under the action of the back suction gear 10, the back suction increase trigger 7 will move in the opposite direction to bring out the piston. At this time, the connection amount between the air hole channel 9 and the exhaust hole 11-3 will increase, thereby reducing the back suction flow rate.

[0037] Among them, the back suction increase trigger 7 is integrally formed with the piston, and a rack is provided on the surface of the back suction increase trigger 7. The rack meshes with the back suction gear 10. The cooperation of the gear and the rack can better control the movement amount of the trigger, achieve stepless speed change, prevent over-adjustment, and improve the adjustment accuracy of the back suction flow rate. And during the process of adjusting the trigger, whether it is to increase or decrease, both fingers participate in exerting force at the same time, which can greatly improve the stability and accuracy of the flow rate adjustment.

[0038] Preferably, a back suction channel air hole 9-1 is further provided on the piston. The back suction channel air hole 9-1 is communicated with the air hole channel 9. When the piston moves, the back suction channel air hole 9-1 is completely, partially or completely communicated with the exhaust hole 11-3. By opening a hole on the air hole channel 9 to form the back suction channel air hole 9-1, the back suction channel air hole 9-1 is relatively small and is located at one end of the back suction channel air hole 9-1. Only by staggering or overlapping the connection between the back suction channel air hole 9-1 and the exhaust hole 11-3 can the purpose of increasing or decreasing the back suction flow rate be achieved.

[0039] Preferably, as Figure 2As shown in the figure, a material sinking trap 11-2 is provided inside the back suction adjustment seat 11. The material sinking trap 11-2 divides the back suction channel 13 into upper and lower sections. The material sinking trap 11-2 includes a U-shaped aisle 11-1 and a material sinking section. The two ends of the U-shaped aisle 11-1 are respectively communicated with the upper and lower sections of the back suction channel 13, and the material sinking section is communicated with the bent part of the U-shaped aisle 11-1. The flushing liquid and tissues or other objects enter the upper section of the back suction channel 13 under the action of negative pressure suction, then sequentially enter one end of the U-shaped aisle 11-1, the material sinking section, flow out from the other end of the U-shaped aisle 11-1 to the lower section of the back suction channel 13, and finally flow out. When the flushing liquid enters the bent part of the U-shaped aisle 11-1 with human tissues, due to the impact force, solid substances such as human tissues will be washed into the material sinking section. The material sinking section acts like a storage bag to store the human tissues, while the flushing liquid normally flows out from the other end of the U-shaped aisle 11-1.

[0040] In a further solution, the U-shaped aisle 11-1 is horizontally arranged, and the material sinking section is vertically arranged. Since the handle 1 is generally held vertically by hand, that is, the upper section of the back suction channel 13 is above the lower section, the two ends of the U-shaped aisle 11-1 also show an up-and-down position relationship, and the material sinking section is also vertically oriented. When the flushing liquid with substances or human tissues passes through the material sinking section of the U-shaped aisle 11-1, it will automatically precipitate into the material sinking section under the action of gravity, and the pure liquid will automatically flow out from the lower end of the U-shaped aisle 11-1 to the lower section of the back suction channel 13 and finally flow out. This can avoid blockage of objects in the back suction channel 13.

[0041] Refer to Figure 1 and Figure 2 As shown in, a flushing hose 3 and a flow rate adjusting mechanism are provided inside the handle 1. The flushing hose 3 is located inside the flushing channel. The flow rate adjusting mechanism includes a pressing member, and the pressing member presses against the outer wall of the flushing hose 3. By adjusting the positional relationship between the pressing member and the outer wall of the flushing hose 3, the flow rate of the flushing hose 3 is adjusted due to different degrees of extrusion.

[0042] During or after the operation, the human tissues at the operation site need to be flushed, so a handheld gun needs to be used, which is not only convenient to operate, but also can be achieved by one person with one hand. When in use, the flushing hose 3 is connected to the liquid bag, the handle 1 is held by hand, and the gun head is inserted into the tissue. The pressurized flushing liquid forms a jet through the flushing hose 3 to complete the flushing. Before or during the flushing, the position of the pressing member can be adjusted, and by changing the distance relationship between the pressing member and the flushing hose 3, different degrees of extrusion of the pressing member on the flushing hose 3 can be achieved. The tighter the extrusion, the smaller the diameter of the flushing hose 3, and thus the smaller the flow rate of the flushing liquid, realizing the adjustment of the liquid inlet flow rate (flushing liquid flow rate).

[0043] Such as Figures 3 - 7As shown in the figure, in a further solution, the flow regulating mechanism further includes a flushing adjustment knob 5, the flushing adjustment knob 5 is rotatably connected to the handle 1, the pressing member is threadedly connected to the flushing adjustment knob 5, a liquid inlet channel is provided in the handle 1, and the flushing hose 3 is located in the liquid inlet channel. Rotating the flushing adjustment knob 5 drives the pressing member to press the flushing hose 3 to achieve flow regulation. The flushing adjustment knob 5 itself can only rotate and cannot move. According to general usage habits, hold the handle 1 with the hand and use the thumb to turn the flushing adjustment knob. Since the pressing member cannot rotate and can only move along its own axial direction, under the action of the threaded fit between the flushing adjustment knob and the pressing member, when the flushing adjustment knob rotates, the pressing member will move along its own central axis direction. Rotating the flushing adjustment knob forward or backward can achieve the reciprocating movement of the pressing member, thereby realizing the squeezing or loosening action on the flushing hose 3 and completing the flow regulation.

[0044] In a further solution, a part of the flushing adjustment knob 5 is exposed from the bent portion of the handheld gun. Refer to Figure 1 and Figure 2 , the outer edge of the flushing adjustment knob 5 is exposed from the bent portion of the handle 1, which is convenient for finger operation.

[0045] In a further solution, the flushing adjustment knob 5 is a gear, and the outer surface of the pressing member is threadedly connected to the inner surface of the central circle of the gear. The edge of the gear is tooth-shaped, so that the finger can easily rotate by pressing on the gear, thereby driving the pressing member to move.

[0046] In a further solution, a fixed column 4 is fixedly provided in the handle 1, the pressing member is a bolt with a hole 12, the outer surface of the fixed column 4 is threadedly connected to the bolt with a hole 12, and the outer surface of the bolt with a hole 12 is threadedly connected to the flushing adjustment knob 5; holes are provided in the fixed column 4 and the bolt with a hole 12 along the radial direction, and the flushing hose 3 passes through the fixed column 4 and the bolt with a hole 12 along the holes; by rotating the flushing adjustment knob 5, the bolt with a hole 12 moves along the axis of the fixed column 4, thereby squeezing the flushing hose 3 to different degrees.

[0047] In a further solution, as Figure 1 shown, a suction channel 13 is further provided in the handle 1. The liquid is ejected from the flushing hose 3 to the target tissue, and the liquid at the target tissue is sucked back through the negative pressure in the suction channel 13. Flushing and suction constitute a common handheld gun. The human tissue is flushed through the flushing hose 3, and at the same time, the flushing liquid at the tissue is sucked back through the negative pressure of the suction channel 13.

[0048] In a further solution, a replaceable gun head 2 is provided at the end of the handle 1, and the replaceable gun head 2 is provided with a first channel and a second channel connected to the flushing hose 3 and the back-suction channel 13 respectively. Since the handle 1 is an integral body, and flushing and back-suction need to be close to or in contact with human tissue, the ends of flushing and back-suction must be replaced or disinfected. Based on this, the end is designed as a replaceable gun head 2, and the replaceable gun head 2 is connected to the end of the handle 1 when in use. After use, the replaceable gun head 2 is dismantled and disinfected for secondary use, or it can be discarded once. It should be pointed out that the connection between the replaceable gun head 2 and the handle 1 is a conventional detachable connection method, such as a snap, plug-in, etc. When connecting, it is only necessary to connect the flushing hose 3 and the back-suction channel 13 to the first channel and the second channel respectively, or a plug-in leak-proof method can be used.

[0049] In a further solution, both the first channel and the second channel are hollow cylindrical channels, and the first channel is located in the second channel. This design allows the flushing channel to be located in the back-suction channel 13, which not only saves space, but also makes the flushing channel jet larger, and the maximum back-suction range of the back-suction channel 13 larger, thereby preventing blockage.

[0050] In a further solution, the liquid inlet end of the flushing hose 3 extends from the bottom end of the handle 1 and is connected to the liquid bag. A peristaltic pump is provided on the flushing hose 3 between the handle 1 and the liquid bag, and the flushing hose 3 is squeezed by the peristaltic pump to form a jet. The liquid bag generally contains a flushing liquid, and the liquid can be selected according to the use requirements. When in use, the liquid inlet end of the flushing hose 3 extends from the bottom end of the handle 1, and it is connected to the pipeline of the liquid bag. Generally, a peristaltic pump is provided on the pipeline of the liquid bag, and the flushing liquid is transported by squeezing the pipeline by the peristaltic pump.

[0051] In a specific implementation scenario, such as Figure 1 As shown, a flushing and re-suction connector 8 is provided at the bottom end of the handle, and a re-suction channel connector 8-1 and a flushing channel connector 8-2 are provided on the flushing and re-suction connector 8, which are respectively connected to the re-suction channel 13 and the flushing hose 3. When in use, the re-suction channel connector 8-1 and the flushing channel connector 8-2 can be directly connected to the external recovery pool and the liquid bag respectively.

[0052] In the description of the embodiments of the present utility model, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "center", "top", "bottom", "top part", "bottom part", "inner", "outer", "inner side", "outer side", etc. are based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. Among them, the "inner side" refers to the internal or enclosed area or space. The "periphery" refers to the area surrounding a specific component or a specific area.

[0053] In the description of the embodiments of the present utility model, the terms "first", "second", "third", "fourth" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first", "second", "third", "fourth" may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0054] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "joined", "assembled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0055] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A hand-held gun with adjustable flow rate of re-absorption liquid, comprising a handle, wherein a flushing channel and a re-absorption channel are provided in the handle, liquid is ejected from the flushing channel to the target tissue, and the liquid in the target tissue is re-absorbed by the negative pressure in the re-absorption channel; characterized in that: The handle is provided with a back-suction adjustment mechanism, the back-suction adjustment mechanism includes a piston and a back-suction adjustment seat, the piston is provided with an air hole channel, the handle is provided with an exhaust hole connected to the outside, and the air hole channel is connected to the back-suction channel; When the piston slides to different positions in the back-suction adjustment seat, part, all or no part of the exhaust hole is communicated with the air hole channel.

2. The hand-held gun with adjustable flow rate of re-sucking liquid according to claim 1, characterized in that: The back-suction regulating mechanism comprises a back-suction reducing trigger and a back-suction increasing trigger, the back-suction increasing trigger is connected to the piston, and the back-suction reducing trigger and the back-suction increasing trigger are directly connected in rolling manner through a back-suction gear; When the back-suction reducing trigger is pressed, the back-suction increasing trigger drives the piston to move in the opposite direction relative to the back-suction reducing trigger, at which time the exhaust hole and the air hole channel are partially or completely connected, and the back-suction flow rate is reduced or no back-suction occurs; When the back-suction plus trigger is pressed, the back-suction plus trigger drives the piston to move, at which time the exhaust hole and the air hole channel are partially connected or not connected, and the back-suction flow rate increases.

3. The hand-held gun with adjustable flow rate of re-sucking liquid according to claim 2, characterized in that: The back-suction trigger is integrally formed with the piston, and a rack is provided on the surface of the back-suction trigger, and the rack is meshed with the back-suction gear.

4. The hand-held gun with adjustable flow rate of re-sucking liquid according to claim 1, characterized in that: The piston is also provided with a back-suction channel air hole, which is connected to the air hole channel. When the piston moves, the back-suction channel air hole is completely connected, partially connected or completely connected to the exhaust hole.

5. The hand-held gun with adjustable flow rate of re-sucking liquid according to claim 1, characterized in that: The handle is also provided with a flow regulating mechanism, the flow regulating mechanism includes a pressing piece, and the flushing channel is provided with a flushing hose; The pressing piece is pressed on the outer wall of the flushing hose, and by adjusting the positional relationship between the pressing piece and the outer wall of the flushing hose, the flushing flow of the flushing hose can be adjusted due to different squeezing degrees.

6. The hand-held gun with adjustable flow rate of re-sucking liquid according to claim 5, characterized in that: The flow regulating mechanism also includes a flushing regulating knob, which is rotatably connected to the handle, and the pressing piece is threadedly connected to the flushing regulating knob. A liquid inlet channel is provided in the handle, and the flushing hose is located in the liquid inlet channel. The flushing regulating knob is rotated to drive the pressing piece to press the flushing hose to achieve flow regulation.

7. The hand-held gun with adjustable flow rate of re-sucking liquid according to claim 6, characterized in that: A partial area of ​​the flushing adjustment knob is exposed from the bent portion of the handheld gun.

8. The hand-held gun with adjustable flow rate of re-sucking liquid according to claim 6, characterized in that: A fixing column is fixed in the handle, the pressing piece is a bolt with a hole, the outer surface of the fixing column is threadedly connected to the bolt with a hole, and the outer surface of the bolt with a hole is threadedly connected to the flushing adjustment knob; The fixing column and the bolt with holes are provided with holes in the radial direction, and the flushing hose passes through the fixing column and the bolt with holes along the holes; By rotating the flushing adjustment knob, the bolt with a hole moves along the axial direction of the fixing column, thereby squeezing the flushing hose to different degrees.

9. The hand-held gun with adjustable flow rate of re-suction liquid according to claim 1, characterized in that: A sinking trap is provided in the back-suction adjustment seat, and the sinking trap divides the back-suction channel into two sections, the sinking trap includes a U-shaped aisle and a sinking part, the two ends of the U-shaped aisle are respectively connected to the upper and lower sections of the back-suction channel, and the sinking part is connected to the bending part of the U-shaped aisle.

10. The hand-held gun with adjustable flow rate of re-suction liquid according to claim 9, characterized in that: The U-shaped passage is arranged horizontally, and the sinking part is arranged vertically.

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