Adjustable spraying device for clinical local anesthesia in anesthesiology department

Abstract

The adjustable spraying device comprises a medicine storage chamber, a cover body and an extraction pipe, the cover body is in threaded connection with the upper portion of the medicine storage chamber, the extraction pipe is connected to the lower portion of the cover body, the extraction pipe is located in the medicine storage chamber and used for extracting an anesthetic, a connector is fixed to the upper portion of the cover body, and the connector is connected with the upper portion of the cover body. The interior of the connector is communicated with the extraction pipe, and the anesthetic in the extraction pipe is guided. According to the adjustable and controllable spraying device for clinical local anesthesia of the anesthesiology department, different spraying ranges can be adjusted through the arrangement of the multiple spraying heads on the movable cover, the spraying head needing to be used can be selected by rotating the movable cover, and a second telescopic hose at the inner end of the adjusted spraying head can be automatically attached to a connector; in addition, by matching with mutual attraction of a first magnetic block and a second magnetic block, positioning of rotation of the movable cover can be achieved, the adjustability and subsequent use convenience of the device are improved, and different local anesthesia requirements can be met.

Description

Technical Field

[0001] This invention relates to the field of anesthetic spray technology, specifically to an adjustable spray device for local anesthesia in clinical anesthesia. Background Technology

[0002] In anesthesiology, common anesthesia methods include inhalation anesthesia, injection anesthesia, and spray anesthesia. Spray anesthesia involves spraying anesthetic agents onto the area requiring anesthesia, providing localized anesthesia. This method is quite common in anesthesiology. For example, an adjustable spray device for local anesthesia in clinical anesthesia, disclosed in application number CN202122259557.5 on February 8, 2022, allows for adjustment of the anesthetic solution dosage by rotating a knob to adjust the height of the movable plate. Furthermore, when used in conjunction with the measuring scale and indicator on the guide rod, the dosage of the sprayed anesthetic solution can be flexibly adjusted, resulting in more precise dosage.

[0003] Although the above-mentioned spraying device can adjust the spray volume, its use requires control via an electric telescopic rod, which may sometimes require a power supply. The installation of electrical equipment also increases the overall weight of the device and the difficulty of subsequent maintenance. Furthermore, the nozzles of the spraying device are generally fixed, and the nozzles need to be disassembled and replaced when adjusting the spray range and spray size, resulting in low flexibility and adjustability of the device. Summary of the Invention

[0004] The purpose of this invention is to provide an adjustable spray device for local anesthesia in anesthesiology, in order to solve the problems of the spray devices mentioned in the background art, where the nozzles are generally fixed and the nozzles need to be disassembled and replaced when adjusting the spray range and spray size, resulting in low flexibility and adjustability of the device.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an adjustable spray device for local anesthesia in anesthesiology, comprising a drug storage chamber, a cover, and an extraction tube. The cover is threadedly connected to the top of the drug storage chamber, and the extraction tube is connected to the bottom of the cover. The extraction tube is located inside the drug storage chamber to extract anesthetic. A connector is fixed to the top of the cover, and the interior of the connector communicates with the extraction tube to guide the anesthetic within the extraction tube. A movable cover is fitted over the outside of the connector, and the movable cover and the connector are rotatably connected. A first telescopic hose is fixed to the outside of the movable cover, and a spray head is connected to the outer end of the first telescopic hose. The spray head and the first telescopic hose are evenly distributed on the outside of the movable cover. Furthermore, the evenly distributed spray heads have different spray ranges, and the connector can only be connected to one set of first telescopic hoses at a time. The inner end of the first telescopic hose is equipped with a telescopic control mechanism, which controls the first telescopic hose to extend outward when it is located at the opening of the connector, while the other first telescopic hoses retract inward. The inner end of the first telescopic hose is connected to a second telescopic hose, and the second telescopic hose is fixed to the inside of the movable cover. The inner end of the second telescopic hose is equipped with a fitting control mechanism, which controls the second telescopic hose and the connector to align when they are facing each other at the opening of the connector. A pressure chamber is fixed to the outside of the drug storage chamber, which increases the air pressure in the drug storage chamber so that the anesthetic can be sprayed out.

[0006] To further optimize this technical solution, the connector is designed with a cylindrical structure, and the vertical center line of the connector coincides with the vertical center line of the movable cover.

[0007] To further optimize this technical solution, an adhesive block is fixed to the inner end of the second telescopic hose. The surface of the adhesive block is made of rubber, and the inner side of the adhesive block has an arc-shaped structure design that fits against the surface of the connector, thereby improving the tightness of the connection between the second telescopic hose and the connector and preventing subsequent leakage.

[0008] To further optimize this technical solution, the telescopic control mechanism includes a guide rod, a second spring, a third magnet, and a magnetic plate;

[0009] A guide rod is fixed to the inner end of the spray head, and the guide rod passes through the movable cover to form a sliding connection between the movable cover and the movable cover, thereby guiding the movement of the spray head;

[0010] The second spring, located on the outside of the guide rod, provides external thrust to the spray head;

[0011] The third magnetic block is fixed to the inner end of the guide rod;

[0012] A magnetic plate is fixed to the surface of the connector. A third magnetic block can attract the magnetic plate to move the guide rod. The opening positions of the magnetic plate and the connector are staggered so that the subsequent first telescopic hose can retract under the action of the third magnetic block.

[0013] To further optimize this technical solution, the bonding control mechanism includes an auxiliary block, a first spring, a first magnetic block, and a second magnetic block;

[0014] An auxiliary block is fixed to the inner end of the second telescopic hose to control the extension and retraction of the second telescopic hose.

[0015] The first spring is connected to the auxiliary block, and the outer end of the first spring is fixed to the inner layer of the movable cover to provide tension to the auxiliary block, so that the second telescopic hose and the connector remain in contact.

[0016] The first magnetic block is fixed at the inner end of the auxiliary block;

[0017] The second magnetic block is fixed on the surface of the connector, and only one set of the second magnetic block is provided. The first magnetic block and the second magnetic block are arranged with opposite magnetic poles facing each other. They attract the first magnetic block located at the opening of the connector, so that the first telescopic hose can automatically retract when it is at the opening of the connector, which facilitates subsequent adjustment.

[0018] To further optimize this technical solution, an air outlet pipe is installed on the right side of the pressurization chamber, which is located inside the drug storage chamber to supply gas to the drug storage chamber. An air inlet pipe is installed above the pressurization chamber to replenish gas into the pressurization chamber. A piston is installed inside the pressurization chamber, and a control rod is connected to the left end of the piston. The left end of the control rod is connected to a control plate. A fourth spring is installed on the right side of the control plate. The fourth spring is fixed to the surface of the drug storage chamber to provide a reset thrust for the control plate. Both the air outlet pipe and the air inlet pipe are equipped with unidirectional guides. The unidirectional guide in the air outlet pipe is guided from the inside to the outside, and the unidirectional guide in the air inlet pipe is guided from the outside to the inside.

[0019] To further optimize this technical solution, the unidirectional guide includes a fixed plate, a guide port, a baffle, a third spring, and a support plate;

[0020] A fixing plate is used to fix the air outlet and air inlet pipes inside the air outlet and air inlet pipes;

[0021] The passageway is located in the middle of the fixed plate;

[0022] A baffle is installed on the outside of the fixed plate to block the passage opening;

[0023] The third spring is located on the outer side of the baffle to provide a restoring thrust for the baffle;

[0024] The support plate is connected to the third spring to provide support.

[0025] To further optimize this technical solution, a movement limiting mechanism is provided on the outer side of the control rod to limit the maximum movement distance of the control rod, thereby controlling the subsequent spray volume.

[0026] To further optimize this technical solution, the moving limiting mechanism is composed of a limiting block. The limiting block is sleeved on the outside of the control rod and forms a threaded connection with the control rod, and the limiting block is located on the outside of the pressure chamber.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] (1) The adjustable spray device for local anesthesia in the Department of Anesthesiology can be adjusted to different spray ranges by setting multiple spray heads on the movable cover. The spray head to be used can be selected by rotating the movable cover. After adjustment, the second telescopic hose at the inner end of the spray head can automatically keep in contact with the connector. In addition, the mutual attraction between the first and second magnetic blocks can also realize the positioning of the rotation of the movable cover, increasing the adjustability of the device and the convenience of subsequent use, and can be adapted to different local anesthesia needs.

[0029] (2) The adjustable spray device for local anesthesia in the Department of Anesthesiology allows the spray head to move in and out of the first telescopic hose. The spray head can be automatically kept in a retracted state when not in use, and the spray head in use can be automatically extended, which is convenient for identification.

[0030] (3) The adjustable spray device for local anesthesia in the Department of Anesthesiology can pressurize the drug storage chamber by pressing the control plate, so that the anesthetic can be sprayed from the spray head. The single pressing distance of the control plate can be adjusted by the limit block. Changing the pressing distance of the control plate can adjust the spray volume of a single press, avoiding the single spray volume being too large or too small after the nozzle is adjusted, thus reducing the waste of anesthetic. Attached Figure Description

[0031] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0032] Figure 2 This is a top view of the structure of the present invention;

[0033] Figure 3 This is a three-dimensional structural diagram of the drug storage chamber of the present invention;

[0034] Figure 4 This is a schematic diagram of the three-dimensional structure of the cover of the present invention;

[0035] Figure 5 This is a schematic diagram of the main cross-sectional structure of the movable cover of the present invention;

[0036] Figure 6This is a top-section schematic diagram of the movable cover structure of the present invention;

[0037] Figure 7 For the present invention Figure 5 Enlarged structural diagram at point a;

[0038] Figure 8 This is a schematic diagram of the main cross-sectional structure of the pressurization chamber of the present invention.

[0039] In the diagram: 1. Medicine storage chamber; 2. Cover; 3. Extraction tube; 4. Connector; 5. Movable cover; 6. First telescopic hose; 7. Spray head; 8. Second telescopic hose; 9. Auxiliary block; 10. Fitting block; 11. First spring; 12. First magnet; 13. Second magnet; 14. Guide rod; 15. Second spring; 16. Third magnet; 17. Magnetic plate; 18. Pressurization chamber; 19. Air outlet pipe; 20. Air inlet pipe; 21. Piston; 22. Control rod; 23. Limiting block; 24. Control panel; 25. One-way guide; 251. Fixing plate; 252. Guide port; 253. Baffle; 254. Third spring; 255. Support plate; 26. Fourth spring. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] Please see Figure 1-8This invention provides a technical solution: an adjustable spray device for local anesthesia in anesthesiology, comprising a drug storage chamber 1, a cover 2, and an extraction tube 3. The cover 2 is threadedly connected to the top of the drug storage chamber 1, and the extraction tube 3 is connected to the bottom of the cover 2. The extraction tube 3 is located inside the drug storage chamber 1 to extract anesthetic. A connector 4 is fixed to the top of the cover 2, and the inside of the connector 4 is connected to the extraction tube 3 to guide the anesthetic in the extraction tube 3. A movable cover 5 is sleeved on the outside of the connector 4, and the movable cover 5 and the connector 4 are rotatably connected. A first telescopic hose 6 is fixed to the outside of the movable cover 5, and a spray head 7 is connected to the outer end of the first telescopic hose 6. The spray heads 7 and the first telescopic hose 6 are evenly distributed on the outside of the movable cover 5, and the spray range of the evenly distributed spray heads 7 is different. The connector 4 only... It can be connected to a set of first telescopic hoses 6 at the same time. The inner end of the first telescopic hose 6 is provided with a telescopic control mechanism. When the first telescopic hose 6 is located at the opening of the connector 4, the first telescopic hose 6 is controlled to extend outward, and the other first telescopic hoses 6 retract inward. The inner end of the first telescopic hose 6 is connected to a second telescopic hose 8, and the second telescopic hose 8 is fixed to the inner side of the movable cover 5. The inner end of the second telescopic hose 8 is provided with a fitting control mechanism. When the second telescopic hose 8 and the opening of the connector 4 are opposite each other, the second telescopic hose 8 and the connector 4 are controlled to dock. The outer side of the drug storage chamber 1 is fixed with a pressure chamber 18. The pressure chamber 18 increases the air pressure in the drug storage chamber 1 so that the anesthetic can be sprayed out. The connector 4 has a cylindrical structure design, and the vertical center line of the connector 4 coincides with the vertical center line of the movable cover 5.

[0042] Before use, the cover 2 can be rotated to remove it from the drug storage chamber 1, making it convenient to add anesthetic drugs to the drug storage chamber 1. After the drugs are added, the cover 2 is closed. The anesthetic drugs are pressurized by the pressurization chamber 18 and forced into the connector 4 through the extraction tube 3. After passing through the second telescopic hose 8 and the first telescopic hose 6, they are sprayed out from the spray head 7 to anesthetize the local area that needs anesthesia. The spray head 7 can also be adjusted according to the anesthesia range to change its spray range. When adjusting, the movable cover 5 can be rotated to move the first telescopic hose 6 and the spray head 7 on its outer side, changing the spray head 7 that is opposite to the outlet on the connector 4, so that the spray head 7 is adjustable.

[0043] The inner end of the second telescopic hose 8 is fixed with a fitting block 10, the surface of which is made of rubber, and the inner side of which has an arc-shaped structure to fit against the surface of the connector 4, improving the tightness of the connection between the second telescopic hose 8 and the connector 4 and preventing subsequent leakage. The telescopic control mechanism includes a guide rod 14, a second spring 15, a third magnet 16, and a magnetic plate 17. The guide rod 14 is fixed to the inner end of the spray head 7 and slides through the movable cover 5 to guide the movement of the spray head 7. The second spring 15 is located on the outside of the guide rod 14 to provide external thrust to the spray head 7. The third magnet 16 is fixed to the inner end of the guide rod 14. The magnetic plate 17 is fixed to the surface of the connector 4. The third magnet 16 can attract the magnetic plate 17 to move the guide rod 14. The opening position of the magnetic plate 17 and the connector 4 is... The staggered arrangement allows the first telescopic hose 6 to retract under the action of the third magnetic block 16. The fitting control mechanism includes an auxiliary block 9, a first spring 11, a first magnetic block 12, and a second magnetic block 13. The auxiliary block 9 is fixed to the inner end of the second telescopic hose 8 to control its extension and retraction. The first spring 11 is connected to the auxiliary block 9, and its outer end is fixed to the inner layer of the movable cover 5 to provide tension to the auxiliary block 9, keeping the second telescopic hose 8 and the connector 4 in contact. The first magnetic block 12 is fixed to the inner end of the auxiliary block 9, and the second magnetic block 13 is fixed to the surface of the connector 4. Only one set of the second magnetic block 13 is provided. The first magnetic block 12 and the second magnetic block 13 are opposite magnetic poles arranged opposite to each other, attracting the first magnetic block 12 located at the opening of the connector 4, so that the first telescopic hose 6 can automatically retract when it turns to the opening of the connector 4, facilitating subsequent adjustments.

[0044] The first telescopic hose 6 and the second telescopic hose 8, which are not opposite to the opening on the connector 4, remain in a retracted state. The guide rod 14 on the first telescopic hose 6 compresses the first telescopic hose 6 through the attraction between the third magnetic block 16 and the magnetic plate 17 at its end, keeping the unused spray head 7 in a retracted state. The second telescopic hose 8 remains in a retracted state under the tension of the first spring 11, preventing the fitting block 10 from contacting the connector 4 and reducing the wear on the fitting block 10 when the movable cover 5 rotates. The second telescopic hose 8, which is opposite to the opening on the connector 4, fits into the opening of the connector 4 under the attraction of the first magnetic block 12 and the second magnetic block 13, allowing the subsequent anesthetic to be delivered smoothly. The third magnetic block 16 and the magnetic plate 17 at the inner end of the guide rod 14 on the outer side of the first telescopic hose 6, which is opposite to the opening on the connector 4, are misaligned, allowing the second spring 15 to push the spray head 7 outward, keeping the spray head 7 in an extended state. For subsequent adjustments, simply rotate the movable cover 5, and the first telescopic hose 6 and the second telescopic hose 8 in the corresponding positions can move automatically.

[0045] An exhaust pipe 19 is installed on the right side of the pressurization chamber 18, which supplies gas to the storage chamber 1. An intake pipe 20 is installed above the pressurization chamber 18 to replenish gas into the pressurization chamber 18. A piston 21 is installed inside the pressurization chamber 18, and a control rod 22 is connected to the left end of the piston 21. A control plate 24 is connected to the left end of the control rod 22. A fourth spring 26 is installed on the right side of the control plate 24. The fourth spring 26 is fixed to the surface of the storage chamber 1 to provide a reset thrust for the control plate 24. Both the exhaust pipe 19 and the intake pipe 20 are equipped with one-way guides 25. The one-way guide 25 in the exhaust pipe 19 is guided from the inside to the outside, and the one-way guide 25 in the intake pipe 20 is guided from the outside to the inside. The one-way guide 25 includes a fixing plate 251 and a guide port. 252, baffle 253, third spring 254 and support plate 255, fixed plate 251, fixed inside the air outlet pipe 19 and air inlet pipe 20, guide port 252, opened in the middle of fixed plate 251, baffle 253 is set on the outside of fixed plate 251 to block guide port 252, third spring 254 is set on the outside of baffle 253 to provide reset thrust for baffle 253, support plate 255 is connected to third spring 254 to provide support for it, and a movement limit mechanism is set on the outside of control rod 22 to limit the maximum movement distance of control rod 22, thereby controlling the subsequent spray volume. The movement limit mechanism is composed of limit block 23, which is sleeved on the outside of control rod 22 and forms a threaded connection with control rod 22, and limit block 23 is located on the outside of pressurization chamber 18;

[0046] During spraying, the control plate 24 can be pressed, and the control plate 24 pushes the piston 21 to move through the control rod 22, forcing the air pressure in the pressurization chamber 18 into the medicine storage chamber 1 through the air outlet pipe 19, thus expelling the medicine in the medicine storage chamber 1. After releasing the control plate 24, the piston 21 returns to its original position, and external gas enters the pressurization chamber 18 through the air inlet pipe 20. The one-way guide 25 controls the gas flow direction in the air inlet pipe 20 and the air outlet pipe 19 to ensure that the gas can be continuously delivered into the medicine storage chamber 1. The movement distance of the piston 21 can be controlled by the limit block 23, which controls the spray volume of a single press. The limit block 23 can be moved on the control rod 22 through a threaded connection between it and the control rod 22 to adjust the movement distance of the piston 21, increasing the overall adjustability of the device.

[0047] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0048] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An adjustable spray device for local anesthesia in the Department of Anesthesiology, comprising a drug storage chamber (1), a cover (2) and an extraction tube (3), wherein the cover (2) is threadedly connected to the upper part of the drug storage chamber (1), and the extraction tube (3) is connected to the lower part of the cover (2), and the extraction tube (3) is located inside the drug storage chamber (1) to extract anesthetic drugs; Its features are: A connector (4) is fixed above the cover (2). The inside of the connector (4) is connected to the extraction tube (3) to guide the anesthetic in the extraction tube (3). A movable cover (5) is fitted on the outside of the connector (4), and the movable cover (5) and the connector (4) are rotatably connected. A first telescopic hose (6) is fixed on the outside of the movable cover (5). A spray head (7) is connected to the outer end of the first telescopic hose (6). The spray head (7) and the first telescopic hose (6) are evenly distributed on the outside of the movable cover (5), and the spray heads (7) have different spray ranges. The connector (4) can only be connected to one set of first telescopic hoses (6) at a time. The inner end is provided with a telescopic control mechanism. When the first telescopic hose (6) is located at the opening of the connector (4), the first telescopic hose (6) is controlled to extend outward, and the other first telescopic hoses (6) retract inward. The inner end of the first telescopic hose (6) is connected to the second telescopic hose (8), and the second telescopic hose (8) is fixed on the inner side of the movable cover (5). The inner end of the second telescopic hose (8) is provided with a fitting control mechanism. When the openings of the second telescopic hose (8) and the connector (4) are opposite each other, the second telescopic hose (8) and the connector (4) are controlled to dock. The outer side of the drug storage chamber (1) is fixed with a pressurization chamber (18). The pressurization chamber (18) increases the air pressure in the drug storage chamber (1) so that the anesthetic can be sprayed out.

2. The adjustable spray device for local anesthesia in anesthesiology clinics according to claim 1, characterized in that: The connector (4) is designed in a cylindrical shape, and the vertical center line of the connector (4) coincides with the vertical center line of the movable cover (5).

3. The adjustable spray device for local anesthesia in anesthesiology as described in claim 2, characterized in that: The inner end of the second telescopic hose (8) is fixed with a bonding block (10), and the surface of the bonding block (10) is made of rubber material. The inner side of the bonding block (10) has an arc-shaped structure design and is in contact with the surface of the connector (4).

4. An adjustable spray device for local anesthesia in anesthesiology clinics according to claim 1 or 3, characterized in that: The telescopic control mechanism includes a guide rod (14), a second spring (15), a third magnet (16), and a magnetic plate (17); The guide rod (14) is fixed to the inner end of the spray head (7), and the guide rod (14) passes through the movable cover (5) and forms a sliding connection between the movable cover (5) to guide the movement of the spray head (7); The second spring (15) is located on the outside of the guide rod (14) and provides external thrust to the spray head (7); The third magnetic block (16) is fixed to the inner end of the guide rod (14); A magnetic plate (17) is fixed on the surface of the connector (4). A third magnetic block (16) can attract the magnetic plate (17) to drive the guide rod (14) to move. The opening positions of the magnetic plate (17) and the connector (4) are staggered.

5. An adjustable spray device for local anesthesia in anesthesiology clinics according to claim 1 or 3, characterized in that: The bonding control mechanism includes an auxiliary block (9), a first spring (11), a first magnetic block (12), and a second magnetic block (13); An auxiliary block (9) is fixed to the inner end of the second telescopic hose (8) to control the extension and retraction of the second telescopic hose (8); The first spring (11) is connected to the auxiliary block (9), and the outer end of the first spring (11) is fixed to the inner layer of the movable cover (5) to provide tension to the auxiliary block (9) so that the second telescopic hose (8) and the connector (4) remain in contact. The first magnetic block (12) is fixed at the inner end of the auxiliary block (9); The second magnetic block (13) is fixed on the surface of the connector (4), and only one set of the second magnetic block (13) is provided. The first magnetic block (12) and the second magnetic block (13) are arranged with opposite magnetic poles facing each other, and attract the first magnetic block (12) located at the opening of the connector (4).

6. The adjustable spray device for local anesthesia in anesthesiology as described in claim 1, characterized in that: An air outlet pipe (19) is installed on the right side of the pressurization chamber (18). The air outlet pipe (19) is located inside the drug storage chamber (1) to supply air to the drug storage chamber (1). An air inlet pipe (20) is installed above the pressurization chamber (18) to replenish the pressurization chamber (18). A piston (21) is installed inside the pressurization chamber (18), and a control rod (22) is connected to the left end of the piston (21). A control plate (24) is connected to the left end of the control rod (22). A fourth spring (26) is provided on the right side of the control panel (24). The fourth spring (26) is fixed on the surface of the medicine storage chamber (1) to provide a reset thrust for the control panel (24). A one-way guide (25) is provided inside the air outlet pipe (19) and the air inlet pipe (20). The one-way guide (25) in the air outlet pipe (19) is guided from the inside to the outside, and the one-way guide (25) in the air inlet pipe (20) is guided from the outside to the inside.

7. The adjustable spray device for local anesthesia in anesthesiology clinics according to claim 6, characterized in that: The unidirectional guide (25) includes a fixed plate (251), a guide port (252), a baffle (253), a third spring (254), and a support plate (255); A fixing plate (251) is fixed inside the air outlet pipe (19) and the air inlet pipe (20); A through-hole (252) is provided in the middle of the fixing plate (251); A baffle (253) is provided on the outside of the fixed plate (251) to block the passage (252); The third spring (254) is provided on the outside of the baffle (253) to provide a restoring thrust to the baffle (253); The support plate (255) is connected to the third spring (254) to provide support for it.

8. An adjustable spray device for local anesthesia in anesthesiology clinics according to claim 6 or 7, characterized in that: A movement limiting mechanism is provided on the outside of the control rod (22) to limit the maximum movement distance of the control rod (22).

9. An adjustable spray device for local anesthesia in anesthesiology clinics according to claim 8, characterized in that: The moving limiting mechanism is composed of a limiting block (23), which is sleeved on the outside of the control rod (22) and forms a threaded connection with the control rod (22), and the limiting block (23) is located on the outside of the pressure chamber (18).

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