Paint spraying device for electronic products

Abstract

The invention discloses a paint spraying device for electronic products, and relates to the technical field of paint spraying devices.The paint spraying device comprises a gun body and a nozzle fixedly arranged at the front end of the gun body, an oil cavity is formed in the gun body, and an oil inlet connector communicated with the oil cavity is formed in the side wall of the gun body; the oil inlet connector is arranged in the direction perpendicular to the central axis of the gun body, the nozzle is communicated with the oil cavity, an oil outlet is formed in the nozzle, and a sealing mechanism used for sealing the oil outlet is arranged in the gun body. According to the paint spraying device, the internal oil inlet and outlet structures are simplified, the flowing-in path of paint is optimized, a paint channel is smoother, the possibility of oil residue accumulation is reduced, and therefore the risk that the paint spraying device is blocked is reduced. And meanwhile, an integrated flow type design is adopted, intermediate links are reduced, the flowing distance of the paint is shortened, the paint can reach the gun body only through the paint inlet connector, and the convenience and cleanliness of operation are improved.

Description

Technical Field

[0001] The present application relates to the technical field of paint spraying devices, and in particular to a paint spraying device for electronic products. Background Art

[0002] Paint spray guns are an important part of industrial spraying equipment and are widely used in industries such as automobile manufacturing, furniture painting, and metal processing. The design of traditional paint spray guns is relatively mature and can achieve basic paint spraying functions, meeting the needs of most users.

[0003] At present, in the existing paint spray gun design, in order to achieve stable spraying of paint, a complex internal piping system is usually used to transport paint. Common design solutions include: 1. Multi-stage filtration device, which removes impurities in the paint through multiple layers of filter screens to prevent blockage; 2. Spiral pipeline design, which uses fluid mechanics principles to optimize the flow path of the paint and reduce resistance; 3. Segmented oil inlet interface, which disperses the paint flow through multiple oil inlet points and balances the pressure.

[0004] However, the oil passage of traditional spray guns is long and complicated, which easily leads to the accumulation of oil residue and then causes the spray gun to be blocked. This not only affects the working efficiency of the spray gun, but also increases the maintenance cost. Secondly, the complex internal structure makes cleaning and maintenance more difficult, and requires regular disassembly and cleaning, which increases the burden on users. Therefore, how to simplify the internal structure of the paint spray gun and reduce the accumulation of oil residue has become a technical problem that needs to be solved urgently. Summary of the invention

[0005] In view of the problems existing in the prior art, the present application provides a paint spraying device for electronic products.

[0006] The present application provides a paint spraying device for electronic products, which adopts the following technical solution: A paint spraying device for electronic products comprises a gun body and a nozzle fixedly arranged at the front end of the gun body, wherein an oil chamber is arranged in the gun body, an oil inlet interface connected to the oil chamber is arranged on the side wall of the gun body, and the oil inlet interface is opened along a direction perpendicular to the central axis of the gun body, and the nozzle is connected to the oil chamber, an oil outlet is arranged on the nozzle, and a sealing mechanism for closing the oil outlet is arranged in the gun body.

[0007] Optionally, the side wall of the gun body is further provided with an oil return interface, and the oil return interface is communicated with the oil chamber.

[0008] Optionally, a front cover is fixedly provided at the front end of the gun body, an air nozzle is fixedly provided on the front cover, and the air nozzle cover is provided on the nozzle, a center hole is opened on the air nozzle, the outlet end of the nozzle is passed through the center hole of the air nozzle, and a mist cavity is formed between the outer part of the nozzle and the inner wall of the air nozzle, a first air inlet interface is provided on the gun body, the first air inlet interface is connected with the mist cavity, a plurality of atomizing air holes are provided on the air nozzle along the circumference of the nozzle, each of the atomizing air holes is connected with the mist cavity, and is used to spray high-pressure gas to atomize the paint.

[0009] Optionally, the outer wall of the air nozzle, the outer wall of the nozzle, the inner wall of the front cover, and the front end of the gun body together form a fan air cavity, and a second air inlet interface is provided on the gun body, and the second air inlet interface is connected to the fan air cavity, and two jet blocks are provided on the end face of the air nozzle away from the gun body, and the two jet blocks are symmetrically arranged on both sides of the air nozzle, and the end faces of the two jet blocks close to each other gradually approach each other in the direction approaching the air nozzle, and the end faces of the two jet blocks close to each other are both provided with fan air outlets, and the fan air outlets are connected to the fan air cavity, so as to guide the spraying direction of the paint and spray it along a fan shape.

[0010] Optionally, the sealing mechanism includes a valve core installed in the cavity, a valve needle slidably inserted in the valve core, and a driving assembly for driving the valve needle to slide, one end of the valve needle is inserted in the nozzle, the side wall of the oil outlet is inclined and gradually decreases in the direction away from the gun body, and the end of the valve needle located in the nozzle is provided with a pointed end, which is adapted to the oil outlet of the nozzle.

[0011] Optionally, the driving assembly includes a cavity arranged in the gun body, a pneumatic piston slidably arranged in the cavity, and a pneumatic interface arranged on the gun body, the pneumatic interface is connected to the cavity, the side wall of the cavity is provided with an installation groove connected to the oil chamber, the valve core is fixedly arranged in the installation groove, and the end of the valve needle away from the nozzle is slidably inserted into the cavity and fixedly connected to the pneumatic piston, the connecting end of the pneumatic interface and the cavity is located between the pneumatic piston and the valve core, a rear cover is fixedly arranged at the rear end of the gun body, the rear cover is provided with an air outlet connected to the cavity, and a first spring is provided in the cavity for driving the valve needle to slide toward the nozzle.

[0012] Optionally, the valve core includes a central cylinder, a first core sleeve and a second core sleeve, the first core sleeve and the second core sleeve are respectively arranged at two ends of the central cylinder, the first core sleeve and the second core sleeve are both provided with a plug-in groove for inserting the central cylinder, the first core sleeve is connected to the installation groove by a thread, and the valve needle is simultaneously inserted into the central cylinder, the first core sleeve and the second core sleeve; The first core sleeve and the second core sleeve are both provided with external rubber rings, and the side walls of the first core sleeve and the second core sleeve are both provided with crimping parts, the crimping parts are used to squeeze the external rubber rings, and the side walls of the installation groove are provided with slope sections; the plug-in grooves of the first core sleeve and the second core sleeve are both provided with internal rubber rings, and the internal rubber rings are provided on the valve needle.

[0013] Optionally, a discharge hole connected to the mounting groove is provided on the gun body, and a connecting end between the discharge hole and the mounting groove is located between the first core sleeve and the second core sleeve, and a through hole is provided on the central cylinder.

[0014] Optionally, a limiting rod is provided on the rear cover, the side wall of the limiting rod is provided with an external thread, the rear cover is provided with a threaded hole adapted to the external thread on the limiting rod, the limiting rod is passed through the threaded hole and cooperates with the rear cover thread, and the limiting rod is used to limit the sliding stroke of the pneumatic piston.

[0015] Optionally, a tail cover is provided on the side of the rear cover away from the gun body, the limit rod is slidably penetrated in the tail cover, the tail cover is provided with a second spring for driving the tail cover to slide toward the rear cover, a connecting groove is provided on the end surface of the tail cover close to the rear cover, the air outlet is connected with the connecting groove, a limit block is provided on the end surface of the rear cover close to the rear cover, and a plurality of limit grooves for inserting the limit blocks are provided on the end surface of the tail cover close to the rear cover, and each of the limit grooves is distributed along the circumference of the tail cover and is connected with the connecting groove.

[0016] In summary, the present application includes at least one of the following beneficial technical effects: 1. The paint spraying device of the present application simplifies the internal oil inlet and outlet structure, making the paint passage smoother and reducing the possibility of oil residue accumulation, thereby reducing the risk of clogging of the paint spraying device. At the same time, the oil inlet interface is opened along the central axis of the vertical gun body, further optimizing the inflow path of the paint and improving the working efficiency and stability of the paint spraying device. In addition, the integrated flow-type design reduces the intermediate links and shortens the flow distance of the paint, so that the paint can reach the gun body only through the oil inlet interface, improving the convenience and cleanliness of operation.

[0017] 2. The application can effectively recycle excess paint through the setting of the oil return interface, prevent paint waste, and reduce environmental pollution. In addition, the design of the oil return interface being connected to the oil chamber helps to maintain the pressure in the oil chamber stable and improve the working efficiency and stability of the paint spraying device.

[0018] 3. The present application can significantly improve the sealing performance through the design of the valve core. Specifically, the valve core is composed of a central cylinder, a first core sleeve and a second core sleeve, and the central cylinder is plugged and matched with the first core sleeve and the second core sleeve respectively, and a double sealing design of an external rubber ring and an internal rubber ring is adopted. When the valve core is installed, the external rubber ring can be firmly fitted in the installation groove through the crimping part, and the slope section of the installation groove is cooperated to effectively close the gap between the valve core and the side wall of the installation groove; further, by arranging an internal rubber ring in the plug-in groove of the first core sleeve and the second core sleeve, as the valve core is installed, the internal rubber ring is squeezed and deformed, thereby effectively closing the gap between the valve core and the valve needle, ensuring that the valve needle always maintains a good sealing state during the sliding process, effectively enhancing the sealing effect, and improving the cleanliness of the inside of the gun body.

[0019] 4. The present application can ensure the stability of the paint spraying device during use by providing a discharge hole connected to the mounting groove on the gun body, and facilitate the later maintenance and cleaning of the inside of the gun body, reduce the accumulation of dirt and impurities, and extend the service life of the paint spraying device. Specifically, since the internal and external rubber rings are prone to aging after a period of use, resulting in a decrease in sealing performance, when the paint in the oil cavity or the high-pressure gas in the mold cavity enters the mounting groove or the inside of the valve core, the excess gas or paint in the mounting groove is directly discharged through the discharge hole, while the excess gas or paint in the valve core enters the mounting groove through the through hole and is then discharged from the discharge port, thereby preventing high-pressure gas from entering the oil cavity and affecting the spraying effect of the paint; or paint from entering the mold cavity and causing contamination in the mold cavity.

[0020] 5. This application provides a limit rod with external threads on the back cover, which cooperates with the threaded hole on the back cover to accurately adjust and limit the sliding stroke of the pneumatic piston, thereby achieving fine control of the opening and closing degree of the valve needle, and then regulating the pressure of the paint when it is sprayed from the nozzle. This not only improves the working stability and reliability of the paint spraying device, but also reduces the risk of leakage caused by excessive sliding stroke of the pneumatic piston. At the same time, this design makes the maintenance and adjustment of the paint spraying device more convenient, further improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 is a cross-sectional view of the overall structure of an embodiment of the present application; Figure 3 It is a structural cross-sectional view of the embodiment of the present application; Figure 4 It is a schematic diagram of the structure of the valve core used in the embodiment of the present application; Figure 5 It is a partial structural diagram of an embodiment of the present application, mainly used to express the connection structure between the back cover and the tail cover.

[0022] Explanation of reference numerals: 100, gun body; 101, nozzle; 102, oil chamber; 103, oil inlet interface; 104, oil outlet; 105, oil return interface; 106, front cover; 107, air nozzle; 108, center hole; 109, mist cavity; 110, first air inlet interface; 111, connecting hole; 112, atomizing air hole; 113, fan cavity; 114, second air inlet interface; 115, jet block; 116, fan outlet; 117, valve needle; 118, cavity; 119, pneumatic piston; 120, pneumatic interface; 121, mounting groove ;122, limit ring;123, back cover;124, air outlet;125, first spring;126, bleed hole;127, limit rod;128, tail cover;129, groove body;130, limit bolt;131, second spring;132, limit plate;133, connecting groove;134, limit block;135, limit groove;2, valve core;21, center cylinder;211, through hole;22, first core sleeve;221, threaded sleeve;23, second core sleeve;24, plug-in groove;25, external rubber ring;26, crimping part;27, internal rubber ring. DETAILED DESCRIPTION

[0023] The following will be combined with the attached Figure 1 -Attached Figure 5 , the technical solutions in the embodiments of the present invention are clearly and completely described. The described embodiments are only possible technical implementations of the present invention, not all possible implementations. Those skilled in the art can completely combine the embodiments of the present invention to obtain other embodiments without creative work, and these embodiments are also within the scope of protection of the present invention.

[0024] The inventor of the present application has found that the oil passage of a conventional spray gun is long and complex, which easily leads to the accumulation of oil residues and thus causes the spray gun to be blocked, which not only affects the working efficiency of the spray gun but also increases the maintenance cost. To this end, the present application provides a spray paint device for electronic products, which mainly adopts the following technical solutions: The present application embodiment discloses a paint spraying device for electronic products. Figure 1 and Figure 2, including a gun body 100 and a nozzle 101 fixedly arranged at the front end of the gun body 100, an oil chamber 102 is arranged in the gun body 100, and an oil inlet interface 103 connected to the oil chamber 102 is arranged on the side wall of the gun body 100, and the oil inlet interface 103 is opened along the direction perpendicular to the central axis of the gun body 100, and the nozzle 101 is connected to the oil chamber 102, and an oil outlet 104 is arranged on the nozzle 101. The oil inlet interface 103 is opened along the direction perpendicular to the central axis of the gun body 100, so as to simplify the structure of the internal oil inlet and outlet 104, make the paint channel smoother, reduce the possibility of oil residue accumulation, and thus reduce the risk of clogging of the paint spraying device. At the same time, the integrated flow-type design is adopted to reduce the intermediate links and shorten the flow distance of the paint, so that the paint can reach the gun body 100 only through the oil inlet interface 103.

[0025] Reference Figure 1 and Figure 2 The side wall of the gun body 100 is also provided with an oil return interface 105, which is connected to the oil chamber 102. The setting of the oil return interface 105 can effectively recycle excess paint, prevent paint waste, and reduce environmental pollution. In addition, the design of the oil return interface 105 being connected to the oil chamber 102 helps to maintain the pressure in the oil chamber 102 stable, thereby improving the working efficiency and stability of the paint spraying device.

[0026] Reference Figure 2 and Figure 3 A front cover 106 is fixedly provided at the front end of the gun body 100, and the front cover 106 is connected to the gun body 100 by threads. A gas nozzle 107 is provided in the front cover 106, and the gas nozzle 107 is covered on the nozzle 101. A central hole 108 is provided on the gas nozzle 107, and the outlet end of the nozzle 101 is penetrated in the central hole 108 of the gas nozzle 107. A mist cavity 109 is formed between the outer part of the nozzle 101 and the inner side wall of the gas nozzle 107. A first air inlet interface 110 is provided on the gun body 100, and a connecting hole 111 for connecting the first air inlet interface 110 and the mist cavity 109 is provided on the nozzle 101. A plurality of atomizing air holes 112 are provided on the gas nozzle 107 along the circumference of the nozzle 101, and each atomizing air hole 112 is connected to the mist cavity 109, and is used to spray high-pressure gas to atomize the paint, and the pressure value of the high-pressure gas is controlled at 0.3-0.6Mpa. The shape of the air nozzle 107 can be selected according to actual needs to adapt to different spraying conditions.

[0027] Reference Figure 2 and Figure 3The outer wall of the air nozzle 107, the outer wall of the nozzle 101, the inner wall of the front cover 106, and the front end of the gun body 100 jointly form a fan air cavity 113, and a second air inlet interface 114 is arranged on the gun body 100, and the second air inlet interface 114 is connected to the fan air cavity 113. The end face of the air nozzle 107 away from the gun body 100 is provided with two jet blocks 115, and the two jet blocks 115 are symmetrically arranged on both sides of the air nozzle 107. The end faces of the two jet blocks 115 close to each other gradually approach each other in the direction close to the air nozzle 107, and the end faces of the two jet blocks 115 close to each other are both provided with fan air outlets 116, and the fan air outlets 116 are connected to the fan air cavity 113. Through the setting of the fan air cavity 113, in conjunction with the fan air outlet 116 on the air nozzle 107, the spraying direction of the paint can be effectively guided and sprayed along a fan shape, thereby adapting to different spraying conditions and improving practicality.

[0028] Reference Figure 2 , a sealing mechanism for closing the oil outlet 104 is provided in the gun body 100. Specifically, the sealing mechanism includes a valve core 2 installed in the cavity, a valve needle 117 slidably penetrated in the valve core 2, and a driving assembly for driving the valve needle 117 to slide. One end of the valve needle 117 is penetrated in the nozzle 101, and the side wall of the oil outlet 104 is inclined and gradually decreases in the direction away from the gun body 100. A tip is provided at one end of the valve needle 117 located in the nozzle 101, and is adapted to the oil outlet 104 of the nozzle 101. The valve needle 117 can be made of stainless steel, which has good corrosion resistance and wear resistance. The tip part of the valve needle 117 can adopt a conical design to better match the inclined side wall of the oil outlet 104 and enhance the sealing effect. The main body of the valve needle 117 can adopt a cylindrical design with a smooth surface to reduce friction and facilitate sliding.

[0029] Reference Figure 2 and Figure 4 The driving assembly includes a cavity 118 arranged in the gun body 100, a pneumatic piston 119 slidably arranged in the cavity 118, and a pneumatic interface 120 arranged on the gun body 100, the pneumatic interface 120 is connected with the cavity 118, and the side wall of the cavity 118 is provided with a mounting groove 121 connected with the oil chamber 102, the valve core 2 is fixedly arranged in the mounting groove 121, and the end of the valve needle 117 away from the nozzle 101 is slidably penetrated in the cavity 118 and fixedly connected with the pneumatic piston 119, and the valve needle 117 and the pneumatic piston 119 are integrally formed, and a limit ring 122 is fixedly arranged in the cavity 118 and at one end of the pneumatic piston 119 close to the valve core 2, which is used to limit the sliding stroke of the pneumatic piston 119, and the connecting end of the pneumatic interface 120 and the cavity 118 is located between the limit ring 122 and the valve core 2, Reference Figure 2The rear end of the gun body 100 is fixedly provided with a rear cover 123, which is connected to the gun body 100 by threads to ensure sealing. The rear cover 123 is provided with an outlet 124 connected to the cavity 118. By introducing high-pressure gas into the pneumatic interface 120, the pressure value of the high-pressure gas is higher than the normal pressure in the gun body, and the pneumatic piston 119 can move quickly under the drive of the high-pressure gas, thereby driving the valve needle 117 to slide and open the oil outlet 104, thereby improving the response speed and operation efficiency of the paint spraying device. At the same time, this design makes the internal structure of the paint spraying device more compact, reduces space occupation, and helps to improve the overall performance and stability of the paint spraying device. In addition, the excess gas is discharged through the outlet 124 on the rear cover 123, further ensuring the stability and reliability of the system.

[0030] Reference Figure 2 Furthermore, a first spring 125 is provided in the cavity, and the two ends of the first spring 125 are respectively in contact with the rear cover 123 and the pneumatic piston 119, and are used to drive the pneumatic piston 119 to slide toward the valve core 2. The first spring 125 can ensure that the valve needle 117 always has a tendency to slide toward the nozzle 101, so that when there is no external pneumatic drive, the valve needle 117 can automatically reset and close the oil outlet 104, effectively preventing paint leakage. At the same time, this design reduces the need for an external power source, making the operation of the paint spraying device easier and more reliable.

[0031] Reference Figure 4 The valve core 2 includes a central cylinder 21, a first core sleeve 22 and a second core sleeve 23. The first core sleeve 22 and the second core sleeve 23 are respectively arranged at the two ends of the central cylinder 21. The first core sleeve 22 and the second core sleeve 23 are both provided with a plug-in groove 24 for inserting the central cylinder 21, and the valve needle 117 is simultaneously penetrated into the central cylinder 21, the first core sleeve 22 and the second core sleeve 23. A threaded sleeve 221 is integrally formed on the first core sleeve 22, and the threaded sleeve 221 is provided with an external thread. The side wall of the mounting groove 121 is provided with an internal thread matched with the external thread on the threaded sleeve 221, and the first core sleeve 22 is connected to the mounting groove 121 by threads, the second core sleeve 23 and the central cylinder 21 are both located in the mounting groove 121, and the second core sleeve 23 abuts against the side wall of the mounting groove 121.

[0032] Reference Figure 4The side walls of the first core sleeve 22 and the second core sleeve 23 are both provided with annular sealing grooves, and the annular sealing grooves of the first core sleeve 22 and the second core sleeve 23 are both sleeved with external rubber rings 25. The side walls of the first core sleeve 22 and the second core sleeve 23 are both provided with crimping parts 26. The side walls of the mounting groove 121 are provided with a slope section. The side walls of the cavity 118 are provided with a crimping groove connected to the mounting groove 121, and the external rubber ring 25 on the first core sleeve 22 is located in the crimping groove. When the valve core 2 is installed, the crimping portion 26 on the first core sleeve 22 presses the external rubber ring 25 into the crimping groove to close the gap between the first core sleeve 22 and the installation groove 121; the crimping portion 26 on the second core sleeve 23 squeezes the external rubber ring 25 and cooperates with the slope section of the installation groove 121, so that the external rubber ring 25 on the second core sleeve 23 can fit firmly on the slope section of the installation groove 121, and close the gap between the second core sleeve 23 and the installation groove 121, thereby effectively closing the gap between the valve core 2 and the side wall of the installation groove 121.

[0033] Reference Figure 4 Furthermore, an internal rubber ring 27 is provided in the plug-in groove 24 of the first core sleeve 22 and the second core sleeve 23, and the internal rubber ring 27 is sleeved on the valve needle 117. By arranging the internal rubber ring 27 in the plug-in groove 24 of the first core sleeve 22 and the second core sleeve 23, as the valve core 2 is installed, the internal rubber ring 27 is squeezed by the central cylinder 21 and deformed, thereby effectively closing the gap between the valve core 2 and the valve needle 117, ensuring that the valve needle 117 always maintains a good sealing state during the sliding process, effectively enhancing the sealing effect, and improving the cleanliness of the inside of the gun body 100.

[0034] Reference Figure 4 Furthermore, the threaded sleeve 221 is also provided with an internal thread, and the side wall of the central cylinder 21 is provided with an external thread that matches the internal thread on the threaded sleeve 221. The central cylinder 21 is connected to the first core sleeve 22 through threads, and an extrusion ring is provided in the plug-in groove 24 of the first core sleeve 22. By rotating the central cylinder 21, the deformation degree of the internal rubber ring 27 in the plug-in groove 24 of the first core sleeve 22 can be adjusted as needed, thereby increasing practicality.

[0035] Reference Figure 4The side wall of the gun body 100 is provided with a discharge hole 126 connected to the mounting groove 121, and the connecting end of the discharge hole 126 and the mounting groove 121 is located between the first core sleeve 22 and the second core sleeve 23, and a through hole 211 is provided on the central cylinder 21; since the internal rubber ring 27 and the external rubber ring 25 are prone to aging after being used for a period of time, resulting in a decrease in sealing performance, when the paint in the oil chamber 102 or the high-pressure gas in the cavity 118 enters the mounting groove 121 or the valve core 2, the excess in the mounting groove 121 The gas or paint is directly discharged through the discharge hole 126, while the excess gas or paint inside the valve core 2 enters the installation groove 121 through the through hole 211 and is then discharged from the discharge port, thereby preventing high-pressure gas from entering the oil chamber 102 and affecting the spraying effect of the paint; or preventing paint from entering the cavity 118 and causing contamination in the cavity 118; thereby ensuring the stability of the paint spraying device during use, facilitating the later maintenance and cleaning of the interior of the gun body 100, reducing the accumulation of dirt and impurities, and extending the service life of the paint spraying device.

[0036] Reference Figure 2 , a limit rod 127 is provided on the rear cover 123, the side wall of the limit rod 127 is provided with an external thread, a threaded hole matched with the external thread on the limit rod 127 is provided on the rear cover 123, and the limit rod 127 is inserted into the threaded hole and matched with the thread of the rear cover 123. By rotating the limit rod 127, the sliding stroke of the pneumatic piston 119 can be accurately adjusted, so as to achieve fine control of the opening and closing degree of the valve needle 117. Then, the pressure of the paint when it is sprayed out from the nozzle is regulated, which not only improves the working stability and reliability of the paint spraying device, but also reduces the risk of leakage caused by excessive sliding stroke of the pneumatic piston 119. At the same time, this design makes the maintenance and adjustment of the paint spraying device more convenient, and further improves the user experience.

[0037] Reference Figure 2 and Figure 5A tail cover 128 is provided on the side of the rear cover 123 away from the gun body 100, and a limiting rod 127 is slidably arranged in the tail cover 128. A groove 129 is provided on the end surface of the tail cover 128 away from the rear cover 123. One end of the limiting rod 127 away from the pneumatic piston 119 extends into the groove 129. One end of the limiting rod 127 away from the pneumatic piston 119 is provided with a thread groove along the length direction of the limiting rod 127. A limiting bolt 130 is threadedly connected in the thread groove. A second spring 131 is provided in the groove 129, and the second spring 131 is sleeved on the limiting bolt 130. On the rod 127, a limiting plate 132 is sleeved on the limiting bolt 130, one end of the second spring 131 abuts against the side wall of the groove body 129, and the other end of the second spring 131 abuts against the limiting plate 132, which is used to drive the tail cover 128 to slide toward the rear cover 123; by rotating the limiting screw, the clamping force of the second spring 131 is adjusted, so that the tail cover 128 can be stably installed on the limiting rod 127, and the end of the tail cover 128 away from the rear cover 123 is fixed with an end plate by bolts, which is used to close the groove body 129 of the tail cover 128.

[0038] Reference Figure 2 and Figure 5 The end surface of the tail cover 128 close to the rear cover 123 is provided with a connecting groove 133, the gas outlet 124 is connected to the connecting groove 133, the end surface of the rear cover 123 close to the tail cover 128 is provided with a limiting block 134, and the end surface of the tail cover 128 close to the rear cover 123 is provided with a plurality of limiting grooves 135 for inserting the limiting blocks 134, and each limiting groove 135 is distributed along the circumference of the tail cover 128 and is connected to the connecting groove 133. By providing a plurality of limiting grooves 135, the connection state of the limiting grooves 135 and the connecting groove 133 is maintained to ensure that the gas can be discharged smoothly. Furthermore, by distributing a plurality of limiting grooves 135 along the circumference of the tail cover 128, the connection stability between the tail cover 128 and the rear cover 123 is enhanced, and the structural strength of the entire paint spraying device is improved.

[0039] The implementation principle of a paint spraying device for electronic products in the embodiment of the present application is as follows: by simplifying the internal structure of the paint spraying device, especially the design of the oil inlet interface 103 and the sealing mechanism, the paint passage is made smoother, the possibility of oil residue accumulation is reduced, and the risk of clogging of the paint spraying device is reduced. At the same time, the oil inlet interface 103 is opened along the central axis direction of the vertical gun body 100, which further optimizes the inflow path of the paint and improves the working efficiency and stability of the paint spraying device. In addition, the integrated flow-type design is adopted to reduce the intermediate links and shorten the flow distance of the paint, so that the paint only needs to pass through the oil inlet interface 103 to reach the gun body 100, which improves the convenience and cleanliness of the operation. This design not only improves the working efficiency and stability of the paint spraying device, but also reduces the maintenance cost and improves the user experience.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A paint spraying device for electronic products, characterized in that: The invention comprises a gun body (100) and a nozzle (101) fixedly arranged at the front end of the gun body (100); an oil chamber (102) is arranged in the gun body (100); an oil inlet interface (103) communicating with the oil chamber (102) is arranged on the side wall of the gun body (100); the oil inlet interface (103) is opened in a direction perpendicular to the central axis of the gun body (100); the nozzle (101) is communicated with the oil chamber (102); an oil outlet (104) is arranged on the nozzle (101); and a sealing mechanism for closing the oil outlet (104) is arranged in the gun body (100).

2. A paint spraying device for electronic products according to claim 1, characterized in that: The side wall of the gun body (100) is also provided with an oil return interface (105), and the oil return interface (105) is communicated with the oil chamber (102).

3. A paint spraying device for electronic products according to claim 1, characterized in that: A front cover (106) is fixedly provided at the front end of the gun body (100), a gas nozzle (107) is fixedly provided on the front cover (106), and the gas nozzle (107) is covered on the nozzle (101), a center hole (108) is opened on the gas nozzle (107), the outlet end of the nozzle (101) is inserted into the center hole (108) of the gas nozzle (107), and the outer side of the nozzle (101) is in contact with the gas nozzle (107). ) is formed between the inner side walls of the gun body (100), a first air inlet interface (110) is provided on the gun body (100), the first air inlet interface (110) is connected to the mist cavity (109), and a plurality of atomizing air holes (112) are provided on the air nozzle (107) along the circumference of the nozzle (101), each of the atomizing air holes (112) is connected to the mist cavity (109) and is used to spray high-pressure gas to atomize the paint.

4. A paint spraying device for electronic products according to claim 3, characterized in that: The outer wall of the air nozzle (107), the outer wall of the nozzle (101), the inner wall of the front cover (106), and the front end of the gun body (100) together form a fan air cavity (113); a second air inlet interface (114) is provided on the gun body (100); the second air inlet interface (114) is communicated with the fan air cavity (113); the end face of the air nozzle (107) away from the gun body (100) is provided with two jet blocks (115); the two jet blocks (115) are symmetrically arranged on both sides of the air nozzle (107); the end faces of the two jet blocks (115) approaching each other gradually approach each other in a direction approaching the air nozzle (107); and the end faces of the two jet blocks (115) approaching each other are both provided with fan air outlets (116); the fan air outlets (116) are communicated with the fan air cavity (113) and are used to guide the spraying direction of the paint and spray it in a fan shape.

5. The paint spraying device for electronic products according to claim 1, characterized in that: The sealing mechanism comprises a valve core (2) installed in the cavity, a valve needle (117) slidably inserted into the valve core (2), and a driving assembly for driving the valve needle (117) to slide, one end of the valve needle (117) is inserted into the nozzle (101), the side wall of the oil outlet (104) is inclined and gradually decreases in the direction away from the gun body (100), and the end of the valve needle (117) located in the nozzle (101) is provided with a tip and is adapted to the oil outlet (104) of the nozzle (101).

6. A paint spraying device for electronic products according to claim 5, characterized in that: The driving assembly comprises a cavity (118) arranged in the gun body (100), a pneumatic piston (119) slidably arranged in the cavity (118), and a pneumatic interface (120) arranged on the gun body (100); the pneumatic interface (120) is communicated with the cavity (118); a side wall of the cavity (118) is provided with a mounting groove (121) communicated with the oil chamber (102); the valve core (2) is fixedly arranged in the mounting groove (121), and the end of the valve needle (117) away from the nozzle (101) is slidably arranged in the cavity (118). The pneumatic interface (120) is movably arranged in the mold cavity (118) and fixedly connected to the pneumatic piston (119); the connecting end between the pneumatic interface (120) and the mold cavity (118) is located between the pneumatic piston (119) and the valve core (2); a rear cover (123) is fixedly arranged at the rear end of the gun body (100); an air outlet (124) connected to the mold cavity (118) is arranged on the rear cover (123); a first spring (125) is arranged in the mold cavity (118) for driving the valve needle (117) to slide in a direction close to the nozzle (101).

7. A paint spraying device for electronic products according to claim 6, characterized in that: The valve core (2) comprises a central cylinder (21), a first core sleeve (22) and a second core sleeve (23); the first core sleeve (22) and the second core sleeve (23) are respectively arranged at two ends of the central cylinder (21); the first core sleeve (22) and the second core sleeve (23) are both provided with a plug-in groove (24) for inserting the central cylinder (21); the first core sleeve (22) is connected to the installation groove (121) by threading, and the valve needle (117) is simultaneously inserted into the central cylinder (21), the first core sleeve (22) and the second core sleeve (23); The first core sleeve (22) and the second core sleeve (23) are both provided with an external rubber ring (25), and the side walls of the first core sleeve (22) and the second core sleeve (23) are both provided with a crimping portion (26), and the crimping portion (26) is used to squeeze the external rubber ring (25), and the side wall of the installation groove (121) is provided with a slope section; the plug-in groove (24) of the first core sleeve (22) and the second core sleeve (23) is both provided with an internal rubber ring (27), and the internal rubber ring (27) is sleeved on the valve needle (117).

8. A paint spraying device for electronic products according to claim 7, characterized in that: The gun body (100) is provided with a discharge hole (126) connected to the mounting groove (121); the connection end between the discharge hole (126) and the mounting groove (121) is located between the first core sleeve (22) and the second core sleeve (23); and the central cylinder (21) is provided with a through hole (211).

9. A paint spraying device for electronic products according to claim 6, characterized in that: The rear cover (123) is provided with a limiting rod (127), the side wall of the limiting rod (127) is provided with an external thread, the rear cover (123) is provided with a threaded hole matched with the external thread on the limiting rod (127), the limiting rod (127) is inserted into the threaded hole and is threadedly matched with the rear cover (123), and the limiting rod (127) is used to limit the sliding stroke of the pneumatic piston (119).

10. A paint spraying device for electronic products according to claim 9, characterized in that: A tail cover (128) is provided on the side of the rear cover (123) away from the gun body (100), the limiting rod (127) is slidably inserted into the tail cover (128), a second spring (131) is provided on the tail cover (128) for driving the tail cover (128) to slide towards the rear cover (123), a connecting groove (133) is provided on the end surface of the tail cover (128) close to the rear cover (123), the air outlet (124) is communicated with the connecting groove (133), a limiting block (134) is provided on the end surface of the rear cover (123) close to the tail cover (128), and a plurality of limiting grooves (135) for inserting the limiting blocks (134) are provided on the end surface of the tail cover (128) close to the rear cover (123), and each of the limiting grooves (135) is distributed along the circumference of the tail cover (128) and is communicated with the connecting groove (133).

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