Retractable spray gun

Abstract

The utility model discloses a retractable spray gun, which relates to the technical field of spray equipment, and comprises a gun body, the inner side of the gun body is fixedly connected with a first connecting block, the outer side of the first connecting block is in threaded connection with a fixed rod, the inner side of the fixed rod is in sliding connection with a movable rod, and the bottom of a sleeve is connected with a first magnetic block. The top of the first magnetic block and the bottom of the pressing block are fixedly connected with a spring, and the spring is located on the outer side of the second connecting rod. The movable block is manually operated to slide on the fixed rod, so that the movable rod and the spray head can be conveniently driven to move, the length of the spray pipe of the gun body is prolonged or shortened, for example, the spray pipe is prolonged during long-distance spraying and shortened in a limited space environment, the universality and the flexibility of the device are greatly improved, and meanwhile, the device is convenient to use. And the length of the spraying pipe can be accurately adjusted according to actual requirements, the spraying range and the spraying angle of materials can be more accurately controlled, work such as fine spraying and accurate feeding which have high requirements for spraying accuracy is facilitated, and the working quality and efficiency are improved.

Description

Technical Field

[0001] This utility model belongs to the technical field of spraying equipment, specifically a retractable spray gun. Background Technology

[0002] A retractable spray gun is a specially designed spraying device with a telescopic gun body. Compared to traditional fixed spray guns, it offers significantly improved flexibility and adaptability. In the automotive manufacturing industry, it can be used for fine spraying in confined spaces such as dashboard gaps and door interiors. In furniture production, it can precisely spray complex structures such as carvings and openwork. In the building decoration industry, it can effectively spray hard-to-reach areas such as building corners and behind pipes.

[0003] When a retractable spray gun is in operation, the paint is first delivered to the paint storage chamber inside the spray gun through the feeding system. At the same time, compressed air is introduced into the spray gun through an air pump or other air source device. When the operator pulls the trigger, the valve opens, and the paint is sprayed out from the nozzle under the action of compressed air, forming a mist that evenly covers the surface of the object being sprayed. The retraction principle of a retractable spray gun mainly relies on mechanical structures, such as a sleeve-type telescopic structure, which uses multiple sleeves of different diameters nested together, with the inner sleeve sliding inside the outer sleeve to achieve telescopic movement; or a screw and nut telescopic structure, which uses the cooperation of a screw and nut, with a motor or manual drive to rotate the screw, causing the nut and the connected spray gun components to telescopically move.

[0004] However, while existing retractable spray guns meet some special spraying needs to a certain extent, they have many obvious drawbacks. Their structure is complex, and in order to realize the telescopic function, many mechanical parts, as well as drive and control components, are added. This not only increases the manufacturing difficulty and cost, but also reduces reliability due to the increase in failure points. In terms of maintenance, the stability of the spray gun is not good when it is telescopic, and it is easy to shake and vibrate, which affects the uniformity of spraying. Utility Model Content

[0005] To overcome the above-mentioned defects, this utility model provides a retractable spray gun, which solves the problem that existing retractable spray guns require the addition of numerous mechanical parts, drive and control components to achieve the telescopic function. This not only increases the manufacturing difficulty and cost, but also reduces reliability due to the increased number of failure points. In terms of maintenance, the spray gun has poor stability when telescopicating, and is prone to shaking and vibration, which affects the uniformity of spraying.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a retractable spray gun, comprising a gun body, a first connecting block fixedly connected to the inner side of the gun body, a fixed rod threadedly connected to the outer side of the first connecting block, a movable rod slidably connected to the inner side of the fixed rod, a material conveying channel being formed in the fixed rod and the movable rod, and a nozzle for use with the material conveying channel being fixedly connected to the outer side of the movable rod, a connecting plate being fixedly connected to the outer side of the movable rod, and the connecting plate being located on one side of the nozzle, a movable block being slidably connected to the outer side of the fixed rod, and a first connecting rod being fixedly connected between the movable block and the connecting plate;

[0007] Multiple sets of sleeves are fixedly installed inside the movable block. A pressure block is movably passed through the top of the sleeve. A second connecting rod is fixedly connected to the bottom of the pressure block. The second connecting rod passes through the fixed rod. A cavity is opened inside the fixed rod. A second magnetic block is fixedly connected to the bottom end of the second connecting rod. The second magnetic block is located in the cavity. A first magnetic block is connected to the bottom of the sleeve. A spring is fixedly connected to the top of the first magnetic block and the bottom of the pressure block. The spring is located outside the second connecting rod.

[0008] As a further embodiment of this utility model: multiple sets of sliding grooves are provided on the outer side of the fixed rod to cooperate with the second connecting rod, a limit block is installed on the outer side of the bottom of the pressure block, and a second mounting groove is provided in the movable block to cooperate with the sleeve.

[0009] As a further embodiment of this utility model: a rotating shaft is rotatably connected to the outside of the gun body, a wrench is connected to the rotating shaft, a first interface is provided at the bottom of the gun body, and a second interface is provided on the back of the gun body.

[0010] As a further embodiment of this utility model: a threaded pipe is fixedly connected to one side of the movable block, a first mounting groove for use with the threaded pipe is opened on the inner side of the connecting block, and a sealing block is fixedly connected to one side of the movable rod, the sealing block being made of rubber.

[0011] As a further embodiment of this utility model: a first connecting pipe is fixedly installed inside the connecting block, and a second connecting pipe is provided inside the fixing rod to cooperate with the first connecting pipe. The diameter of the second connecting pipe is smaller than that of the first connecting pipe, and the second connecting pipe fits into the inner wall of the first connecting pipe. A rubber pad is provided on the inner wall of the first connecting pipe.

[0012] As a further embodiment of this utility model: the connecting block has a slot for use with the gun body, and one end of the first connecting pipe is connected and fixedly connected to the storage box inside the gun body.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. By manually operating the movable block to slide on the fixed rod, the movable rod and nozzle can be easily moved, thus extending or shortening the length of the nozzle. This allows the device to be adjusted according to different working distances and space requirements. For example, the nozzle can be extended when spraying at long distances, and shortened in environments with limited space, greatly improving the versatility and flexibility of the device. At the same time, the nozzle length can be precisely adjusted according to actual needs, allowing for more accurate control of the spray range and spray angle of the material. This is beneficial for tasks with high spray accuracy requirements, such as fine spraying and precise feeding, thereby improving work quality and efficiency.

[0015] 2. The self-locking function is achieved by the magnetic attraction between the first and second magnetic blocks. After the nozzle is adjusted to the appropriate length, the position of the movable block can be reliably fixed, effectively preventing the nozzle from moving unexpectedly due to external forces such as vibration and collision, thus ensuring the stability and reliability of the operation. To unlock, simply apply pressure to the pressure block to move the second magnetic block away from the first magnetic block. The reset process is automatically completed by the spring, which is simple to operate, reduces the labor intensity of operators, reduces the probability of errors caused by complex operation, and ensures that the device can be restored to a lockable state after each operation, improving the convenience of use and the continuity of work. In addition, the spring also plays a buffering role, reducing damage to the magnetic blocks and other components, and extending the service life of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a first-view schematic diagram of the cross-sectional structure of this utility model;

[0018] Figure 3 This is a second-view schematic diagram of the cross-sectional structure of this utility model;

[0019] Figure 4 This is a first-person perspective schematic diagram showing the disassembly effect of the main structure of this utility model;

[0020] Figure 5 This is a second-view schematic diagram showing the disassembly effect of the main structure of this utility model;

[0021] Figure 6 For the present utility model Figure 2 A magnified view of a portion of point A in the middle.

[0022] In the diagram: 1. Gun body; 2. Connecting block; 3. Movable block; 4. Fixed rod; 5. Movable rod; 6. Nozzle; 7. Connecting plate; 8. First connecting rod; 9. Slide groove; 10. Sleeve; 11. Rotating shaft; 12. Wrench; 13. First interface; 14. Cavity; 15. Pressure block; 16. Sealing block; 17. First connecting pipe; 18. Second interface; 19. Limiting block; 20. Spring; 21. Second connecting rod; 22. Second connecting pipe; 23. Threaded pipe; 24. First mounting groove; 25. First magnetic block; 26. Slot; 27. Second magnetic block; 28. Second mounting groove. Detailed Implementation

[0023] The technical solution of this patent will be further described in detail below with reference to specific embodiments.

[0024] like Figures 1-6 As shown, this utility model provides a retractable spray gun technical solution:

[0025] The gun body 1 is included. A first connecting block 2 is fixedly connected to the inner side of the gun body 1. A fixed rod 4 is threadedly connected to the outer side of the first connecting block 2. A movable rod 5 is slidably connected to the inner side of the fixed rod 4. A material conveying channel is opened in the fixed rod 4 and the movable rod 5. A nozzle 6 for use with the material conveying channel is fixedly connected to the outer side of the movable rod 5. A connecting plate 7 is fixedly connected to the outer side of the movable rod 5 and is located on one side of the nozzle 6. A movable block 3 is slidably connected to the outer side of the fixed rod 4. A first connecting rod 8 is fixedly connected between the movable block 3 and the connecting plate 7.

[0026] Multiple sets of sleeves 10 are fixedly installed inside the movable block 3. A pressure block 15 is movably passed through the top of the sleeve 10. A second connecting rod 21 is fixedly connected to the bottom of the pressure block 15. The second connecting rod 21 passes through the fixed rod 4. A cavity 14 is opened inside the fixed rod 4. A second magnetic block 27 is fixedly connected to the bottom of the second connecting rod 21. The second magnetic block 27 is located inside the cavity 14. A first magnetic block 25 is connected to the bottom of the sleeve 10. A spring 20 is fixedly connected to the top of the first magnetic block 25 and the bottom of the pressure block 15. The spring 20 is located outside the second connecting rod 21.

[0027] Specifically, when it is necessary to extend the nozzle of the gun body 1, the operator manually operates the movable block 3, causing it to slide outside the fixed rod 4. Since the movable block 3 is fixedly connected to the connecting plate 7 via the first connecting rod 8, and the connecting plate 7 is fixed outside the movable rod 5, the movement of the movable block 3 will drive the movable rod 5 to move synchronously via the first connecting rod 8. The movable rod 5 slides outward inside the fixed rod 4, and the nozzle 6 moves together with the movable rod 5 until the required nozzle length is reached. At this point, the movement of the movable block 3 is stopped. After the movable block 3 stops moving, a magnetic attraction is generated between the first magnetic block 25 at the bottom of the sleeve 10 and the second magnetic block 27 at the bottom of the second connecting rod 21. This magnetic attraction limits and fixes the movable block 3 in its current position. The nozzle is positioned to prevent it from moving during operation due to external forces or vibrations, thus ensuring the stability of the nozzle length and ensuring that the material can be sprayed according to the preset distance and direction. When the nozzle length needs to be adjusted again, the operator applies inward pressure to the pressure block 15. The pressure block 15 overcomes the elastic force of the spring 20 and squeezes inward, which drives the second magnetic block 27 away from the first magnetic block 25 through the second connecting rod 21. When the distance between the second magnetic block 27 and the first magnetic block 25 increases to a certain extent, the magnetic attraction weakens to the point that it can no longer restrict the movement of the movable block 3, and the movable block 3 is unlocked and can slide on the fixed rod 4 again to adjust the nozzle length. When the operator releases the pressure on the pressure block 15, the spring 20 uses its own... The elastic potential energy of the body returns to its original state, and the rebound of spring 20 pushes the pressure block 15 to move outward. The pressure block 15, through the second connecting rod 21, drives the second magnetic block 27 to move closer to the first magnetic block 25. After the position of the movable block 3 is adjusted, the first magnetic block 25 and the second magnetic block 27 generate magnetic attraction again, and the movable block 3 is fixed again. By adjusting the position of the movable block 3 on the fixed rod 4, the length of the nozzle of the gun body 1 can be easily extended or shortened. This allows the device to adapt to different working distances and working space requirements. For example, when it is necessary to spray material at a target at a long distance, the nozzle can be extended; while in a space-constrained environment, the nozzle can be shortened, improving the versatility and flexibility of the device. The nozzle length can be precisely adjusted according to actual needs, thereby more accurately controlling the spray range and spray angle of the material. This is very beneficial for some operations with high requirements for spray accuracy, such as fine spraying and precise feeding, which can improve work quality and efficiency. The self-locking function is achieved by using the magnetic attraction between the first magnetic block 25 and the second magnetic block 27. After the nozzle is adjusted to the appropriate length, the position of the movable block 3 can be reliably fixed. This locking method has high stability and can effectively prevent the nozzle from moving unexpectedly due to vibration, collision and other factors during operation, ensuring the stability and reliability of the work. The unlocking process only requires applying pressure to the pressure block 15 to make the second magnetic block 27 move away from the first magnetic block 25 to achieve unlocking.The reset process is automatically completed by spring 20 without complicated operation steps. This simple operation method reduces the labor intensity of operators, improves work efficiency, and reduces the probability of errors caused by complex operation. The elastic potential energy of spring 20 allows the pressure block 15 to automatically drive the second connecting rod 21 and the second magnetic block 27 to reset after the pressure is released, without manual intervention. This not only simplifies the operation process, but also ensures that the device can be restored to a lockable state after each operation, improving the ease of use and work continuity of the device. Spring 20 also plays a buffering role in the whole process. During the process of applying pressure to unlock and releasing pressure to reset, spring 20 can absorb and buffer part of the impact force, reduce damage to the magnetic block and other components, and extend the service life of the device.

[0028] The outer side of the fixed rod 4 has multiple sets of sliding grooves 9 for use with the second connecting rod 21. The bottom outer side of the pressure block 15 is equipped with a limit block 19. The movable block 3 has a second mounting groove 28 for use with the sleeve 10. The outer side of the gun body 1 is rotatably connected to a rotating shaft 11. A wrench 12 is connected to the rotating shaft 11. The bottom of the gun body 1 is provided with a first interface 13. The back of the gun body 1 is provided with a second interface 18.

[0029] Specifically, the sliding groove 9 on the outer side of the fixed rod 4 provides precise guidance for the movement of the second connecting rod 21, ensuring that the second connecting rod 21 will not deviate during movement, ensuring accurate alignment and separation of the second magnetic block 27 and the first magnetic block 25, and improving the reliability of locking and unlocking. At the same time, the limiting block 19 at the bottom of the pressure block 15 cooperates with the second mounting groove 28 in the movable block 3 to further restrict the movement path of the pressure block 15, preventing it from shaking or misaligning during operation, and enhancing the stability of operation. Through the design of the wrench 12 and the rotating shaft 11, the operator can operate and control the device more conveniently, enabling the gun body 1 to flexibly carry out spraying work. The first interface 13 at the bottom of the gun body 1 and the second interface 18 on the back can be used to connect different material sources or other equipment, connecting the corresponding pipes or devices to the interface to prepare for material conveying. The material enters the gun body 1 from the connected material source through the first interface 13 or the second interface 18, then passes through the conveying channel in the first connecting block 2, the fixed rod 4 and the movable rod 5, and finally sprays out from the nozzle 6.

[0030] A threaded pipe 23 is fixedly connected to one side of the movable block 3. A first mounting groove 24 for use with the threaded pipe 23 is opened on the inner side of the connecting block 2. A sealing block 16 is fixedly connected to one side of the movable rod 5. The sealing block 16 is made of rubber. A first connecting pipe 17 is fixedly installed on the inner side of the connecting block 2. A second connecting pipe 22 for use with the first connecting pipe 17 is provided in the fixed rod 4. The diameter of the second connecting pipe 22 is smaller than that of the first connecting pipe 17. The second connecting pipe 22 fits into the inner wall of the first connecting pipe 17. A rubber pad is provided on the inner wall of the first connecting pipe 17. A slot 26 for use with the gun body 1 is opened in the connecting block 2. One end of the first connecting pipe 17 is connected to the storage box in the gun body 1.

[0031] Specifically, the threaded tube 23 on one side of the movable block 3 is aligned with the first mounting groove 24 inside the connecting block 2, and the threaded tube 23 is screwed into the first mounting groove 24 to achieve a stable connection between the movable block 3 and the connecting block 2. The sealing block 16 on the movable rod 5 contacts the relevant part of the connecting block 2 as the movable rod 5 moves. Since the sealing block 16 is made of rubber, it will deform to a certain extent during the contact process, thereby playing a sealing role and preventing material leakage. The second connecting tube 22 inside the fixed rod 4 is connected to the first connecting tube 17 inside the connecting block 2. Because the diameter of the second connecting tube 22 is smaller than that of the first connecting tube 17 and is connected to the first connecting tube 17, the connection is made more secure. The inner wall of the connecting pipe 17 fits together, and the inner wall of the first connecting pipe 17 has a rubber gasket. When the two are connected, the rubber gasket further ensures the sealing of the connection. The gun body 1 is embedded into the slot 26 opened in the connecting block 2 to complete the installation of the gun body 1 and the connecting block 2. At this time, one end of the first connecting pipe 17 is connected to the storage box in the gun body 1. The material starts from the storage box in the gun body 1, passes through the first connecting pipe 17 connected to the storage box, and then enters the conveying channel in the fixed rod 4 and the movable rod 5 through the connected second connecting pipe 22. The material reaches the nozzle 6 along the conveying channel and is finally sprayed out from the nozzle 6 to complete the material spraying operation.

[0032] The working principle of this utility model is as follows:

[0033] First, the operator manually moves the movable block 3 so that it slides on the outside of the fixed rod 4. Since the movable block 3 is connected to the connecting plate 7 through the first connecting rod 8, and the connecting plate 7 is fixed on the outside of the movable rod 5, the movement of the movable block 3 will drive the movable rod 5 to slide synchronously on the inside of the fixed rod 4, thereby causing the nozzle 6 to move with the movable rod 5 and realize the change of the nozzle length.

[0034] Secondly, when the movable block 3 stops moving to the appropriate position, the first magnetic block 25 at the bottom of the sleeve 10 and the second magnetic block 27 at the bottom of the second connecting rod 21 are magnetically attracted to each other, which limits and fixes the movable block 3 to prevent it from moving due to external force or vibration, and ensures the stability of the nozzle length.

[0035] Furthermore, when the nozzle length needs to be adjusted again, the operator applies inward pressure to the pressure block 15. The pressure block 15 overcomes the elastic force of the spring 20 and drives the second magnetic block 27 away from the first magnetic block 25 through the second connecting rod 21. When the distance between the two increases to a certain extent, the magnetic attraction weakens, and the movable block 3 unlocks and can slide again. After the operator releases the pressure on the pressure block 15, the spring 20 uses its elastic potential energy to rebound, pushing the pressure block 15 to move outward, causing the second magnetic block 27 to move closer to the first magnetic block 25 again, thus locking again.

[0036] It is worth mentioning that the first interface 13 at the bottom of the gun body 1 and the second interface 18 on the back can be connected to different material sources or other equipment. The material enters the gun body 1 from the connected material source through these two interfaces. The material entering the gun body 1 first reaches the storage box inside the gun body 1, then passes through the first connecting pipe 17 connected to the storage box, and then enters the conveying channel in the fixed rod 4 and the movable rod 5 through the docked second connecting pipe 22. The material reaches the nozzle 6 along the conveying channel and is finally sprayed out from the nozzle 6 to complete the material spraying operation.

[0037] Finally, the sliding groove 9 on the outer side of the fixed rod 4 provides precise guidance for the movement of the second connecting rod 21, ensuring accurate alignment and separation of the second magnetic block 27 and the first magnetic block 25; the limiting block 19 at the bottom of the pressure block 15 cooperates with the second mounting groove 28 in the movable block 3 to restrict the movement path of the pressure block 15 and enhance operational stability; the design of the rotating shaft 11 and the wrench 12 on the outer side of the gun body 1 facilitates the operation and control of the device by the operator and reduces the difficulty of operation; the threaded tube 23 of the movable block 3 is threadedly connected to the first mounting groove 24 of the connecting block 2 to achieve a stable connection between the movable block 3 and the connecting block 2; the rubber sealing block 16 on the movable rod 5 deforms during movement to prevent material leakage; the rubber gasket on the inner wall of the first connecting tube 17 further ensures the sealing of the connection when it docks with the second connecting tube 22; the gun body 1 is installed by cooperating with the connecting block 2 through the slot 26 to complete the installation of the gun body 1 and the connecting block 2 and ensure the connection strength.

[0038] The preferred embodiments of this patent have been described in detail above. However, this patent is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this patent.

Claims

1. A retractable spray gun comprising a gun body (1), characterised in that: The gun body (1) is fixedly connected to a first connecting block (2) on its inner side. A fixed rod (4) is threadedly connected to the outer side of the first connecting block (2). A movable rod (5) is slidably connected to the inner side of the fixed rod (4). A material conveying channel is opened in the fixed rod (4) and the movable rod (5). A nozzle (6) for use with the material conveying channel is fixedly connected to the outer side of the movable rod (5). A connecting plate (7) is fixedly connected to the outer side of the movable rod (5). The connecting plate (7) is located on one side of the nozzle (6). A movable block (3) is slidably connected to the outer side of the fixed rod (4). A first connecting rod (8) is fixedly connected between the movable block (3) and the connecting plate (7). Multiple sets of sleeves (10) are fixedly installed inside the movable block (3). A pressure block (15) is movably passed through the top of the sleeve (10). A second connecting rod (21) is fixedly connected to the bottom of the pressure block (15). The second connecting rod (21) passes through the fixed rod (4). A cavity (14) is opened inside the fixed rod (4). A second magnetic block (27) is fixedly connected to the bottom end of the second connecting rod (21). The second magnetic block (27) is located inside the cavity (14). A first magnetic block (25) is connected to the bottom of the sleeve (10). A spring (20) is fixedly connected to the top of the first magnetic block (25) and the bottom of the pressure block (15). The spring (20) is located outside the second connecting rod (21).

2. The retractable spray gun of claim 1, wherein: The fixed rod (4) has multiple sets of sliding grooves (9) on its outer side that cooperate with the second connecting rod (21). The pressure block (15) has a limit block (19) installed on its bottom outer side. The movable block (3) has a second mounting groove (28) that cooperates with the sleeve (10).

3. The retractable spray gun of claim 1, wherein: A rotating shaft (11) is rotatably connected to the outside of the gun body (1), and a wrench (12) is connected to the rotating shaft (11). A first interface (13) is provided at the bottom of the gun body (1), and a second interface (18) is provided on the back of the gun body (1).

4. The retractable spray gun of claim 1, wherein: A threaded tube (23) is fixedly connected to one side of the movable block (3), and a first mounting groove (24) for use with the threaded tube (23) is opened on the inner side of the connecting block (2). A sealing block (16) is fixedly connected to one side of the movable rod (5), and the sealing block (16) is made of rubber.

5. The retractable spray gun of claim 1, wherein: The first connecting pipe (17) is fixedly installed inside the connecting block (2). The fixing rod (4) is provided with a second connecting pipe (22) that works with the first connecting pipe (17). The diameter of the second connecting pipe (22) is smaller than that of the first connecting pipe (17). The second connecting pipe (22) fits into the inner wall of the first connecting pipe (17). The inner wall of the first connecting pipe (17) is provided with a rubber pad.

6. The retractable spray gun of claim 5, wherein: The connecting block (2) has a slot (26) for use with the gun body (1), and one end of the first connecting pipe (17) is connected to the storage box inside the gun body (1) in a fixed manner.

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