Spraying device for plastic keyboard

Abstract

The utility model belongs to the technical field of keyboard spraying, and particularly relates to a spraying device for a plastic keyboard, which comprises a connecting cavity, a sliding groove is arranged on the top side of the connecting cavity, a sliding block is slidably mounted in the sliding groove, a conveying pipe is mounted on the bottom side of the sliding block, six spraying nozzles are equidistantly mounted on the outer side of the conveying pipe, and a rack is mounted on the top side of the sliding block. A circular gear is mounted on the outer side of the rotating shaft, and a trigger switch is mounted on one side of each supporting plate; a control panel starts a servo motor, a rotating shaft at the output end of the servo motor drives a circular gear, then a rack meshed with the circular gear is driven, a sliding block is driven to slide in a sliding groove, the sliding block slides to one end of a connecting cavity to trigger a trigger switch, a signal is transmitted to the control panel, the servo motor is controlled to rotate reversely, the sliding block slides reversely, and when the sliding block reaches the other end, the trigger switch at the other end is triggered; and the servo motor rotates reversely again, circulation is conducted, the conveying pipe and the spraying nozzle move in a reciprocating mode, and it is guaranteed that the keyboard shell is evenly sprayed with the paint.

Description

Technical Field

[0001] This utility model relates to the field of keyboard spraying technology, specifically a spraying device for plastic keyboards. Background Technology

[0002] A plastic keyboard is a type of keyboard made primarily of plastic. In daily use, the keyboard casing is frequently exposed to objects such as desktops, making it prone to wear and tear. Spraying a wear-resistant coating can increase the hardness and wear resistance of the casing, thus requiring a spraying device.

[0003] A Chinese patent with authorization announcement number CN214440374U discloses a high-efficiency spraying device for keyboard production and processing. The device includes a first plate, with four placement plates fixed to its upper surface and two first fixing plates welded to its upper surface. Each first fixing plate has a first electric push rod mounted on its front surface. This device uses a fan and nozzles to restrict the paint sprayed from the nozzle, improving the concentration of the sprayed paint and thus enhancing the spraying effect on the keyboard casing. This also prevents the paint from spreading to the surrounding environment and causing pollution. A heating plate quickly dries the keyboard casing, and a second electric push rod, in conjunction with a push plate, lifts the keyboard casing, facilitating its removal after spraying. This improves the spraying efficiency of the keyboard casing and is beneficial for keyboard production and processing.

[0004] However, the above-mentioned spraying device still has some problems. In practical applications, it cannot realize the automatic reciprocating motion of the delivery pipe and the spray nozzle in the chute, resulting in uneven distribution of the spray paint on the keyboard shell. The fixed spray nozzle can only spray a specific area of ​​the keyboard shell, thereby reducing the overall quality of the plastic keyboard. Therefore, a spraying device for plastic keyboards is proposed to address the above problems. Utility Model Content

[0005] In order to overcome the shortcomings of the existing technology and solve the problems mentioned in the background art, this utility model proposes a spraying device for plastic keyboards.

[0006] The technical solution adopted by this utility model to solve its technical problem is as follows: A spraying device for plastic keyboards, comprising a spraying box, a connecting cavity connected to the outer side of one end of the spraying box, a sliding groove formed on the top side of the connecting cavity, a slider slidably mounted inside the sliding groove, a conveying pipe mounted on the bottom side of the slider, six spray nozzles equidistantly mounted on the outer side of the conveying pipe, a feeding pipe mounted at the middle end of the conveying pipe, the feeding pipe slidably penetrating one side of the connecting cavity, one end of the feeding pipe communicating with a spraying material tank, and a rack mounted on the top side of the slider. A mounting plate is installed on the outer top of the spray box, and a servo motor is installed on the bottom side of the mounting plate. A rotating shaft is installed at the output end of the servo motor, and a circular gear is installed on the outer side of the rotating shaft. The circular gear meshes with a rack. Support plates are symmetrically installed at both ends of the top side of the connecting cavity. A trigger switch is installed on one side of each support plate. The trigger switches are used to rotate the servo motor forward and reverse, respectively. The servo motor drives the slider and the spray nozzle to reciprocate in the groove, ensuring that the paint is evenly sprayed on the outer side of the keyboard shell and improving the processing quality of the plastic keyboard.

[0007] Preferably, a drive motor is installed on the top side of the spray box, a rotating shaft is installed at the output end of the drive motor, and a turntable is installed at the bottom end of the rotating shaft. The radius of the turntable is less than or equal to the inner diameter of the spray box. Six connecting shafts are equidistantly mounted inside the turntable. A gear is installed at the top of each connecting shaft, and a hook is installed at the bottom of each connecting shaft. A gear ring is installed on the inner wall of the top of the spray box, and the gears mesh with each other. The drive motor drives the keyboard shell to revolve, and the connecting shafts drive it to rotate, ensuring that the paint can be fully and evenly covered on the keyboard shell.

[0008] Preferably, the other end of the spray box is connected to an installation cavity, one side of the installation cavity is connected to an air inlet duct, the inside of the air inlet duct is equipped with an electric heating mesh plate, two negative pressure motors are equidistantly installed on the inner wall of the installation cavity, and the output end of each negative pressure motor is equipped with three fan blades. The other side of the installation cavity extends into the interior of the spray box and is provided with a blowing groove. The drying assembly composed of the electric heating mesh plate and the negative pressure motor can quickly dry the paint after spraying, thereby improving production efficiency.

[0009] Preferably, a discharge pipe is connected to one side of the bottom of the spray box, and a valve is installed inside the discharge pipe to facilitate the discharge of excess paint and reduce waste.

[0010] Preferably, a hinged door is installed on one side of the spray box, and the lowest point of the door is higher than the height of the discharge pipe, which facilitates opening and closing the door and thus makes it easier to put the keyboard shell in and out.

[0011] Preferably, a control panel is installed on one side of the connecting cavity. The control panel is electrically connected to the trigger switch and the servo motor. The control panel is used for signal transmission of the trigger switch and operation control of the servo motor, and is used to control the trigger switch and the servo motor to realize automated operation.

[0012] The advantages of this utility model are:

[0013] 1. The control panel of this utility model starts the servo motor, whose output shaft drives the circular gear, which in turn drives the rack meshing with it, causing the slider to slide in the slide groove. When the slider slides to one end of the connecting cavity, it triggers the trigger switch, and the signal is transmitted to the control panel to control the servo motor to reverse, so that the slider slides in the opposite direction. When it reaches the other end, the trigger switch at the other end is triggered, and the servo motor reverses again. This cycle repeats, causing the delivery pipe and the spray nozzle to move back and forth, ensuring that the paint is evenly sprayed onto the keyboard shell.

[0014] 2. In this utility model, the keyboard shell is suspended on the outside of the hook. When the drive motor is started, the output shaft drives the turntable to rotate. When the turntable rotates, the hook also rotates. At the same time, when the turntable drives the connecting shaft to revolve, the connecting shaft will rotate on its own axis due to the meshing of gear 1 and gear ring. In this way, the keyboard shell suspended on the hook rotates on its own axis while revolving, ensuring that the coating can be fully and evenly covered on the keyboard shell. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the intermediate axis side view of the present invention;

[0017] Figure 2 This is a cross-sectional structural diagram of the spraying device;

[0018] Figure 3 This is a schematic diagram of the spraying assembly structure;

[0019] Figure 4 This is a schematic diagram of the structure used for the keyboard rotation assembly;

[0020] Figure 5 This is a schematic diagram of the drying component.

[0021] In the diagram: 1. Spraying box; 2. Connecting cavity; 3. Slide groove; 4. Slider; 5. Conveying pipe; 6. Spray nozzle; 7. Feed pipe; 8. Rack; 9. Mounting plate; 10. Servo motor; 11. Rotating shaft; 12. Circular gear; 13. Support plate; 14. Trigger switch; 15. Drive motor; 16. Rotating shaft; 17. Turntable; 18. Connecting shaft; 19. Gear 1; 20. Hook; 21. Gear ring; 22. Mounting cavity; 23. Air inlet duct; 24. Heating grid plate; 25. Negative pressure motor; 26. Fan blade; 27. Air blowing duct; 28. Discharge pipe; 29. ​​Valve; 30. Movable door; 31. Control panel. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0023] Please see Figure 1-3 As shown, a spraying device for plastic keyboards includes a spraying box 1. A connecting cavity 2 is connected to the outer side of one end of the spraying box 1. A groove 3 is formed on the top side of the connecting cavity 2. A slider 4 is slidably installed inside the groove 3. A conveying pipe 5 is installed on the bottom side of the slider 4. Six spray nozzles 6 are equidistantly installed on the outer side of the conveying pipe 5. A feed pipe 7 is installed at the middle end of the conveying pipe 5. The feed pipe 7 slidably passes through one side of the connecting cavity 2. One end of the feed pipe 7 is connected to a spraying material tank. The slider 4... A rack 8 is installed on the top side of the spray box 1. An installation plate 9 is installed on the outer side of the top of the spray box 1. A servo motor 10 is installed on the bottom side of the installation plate 9. A rotating shaft 11 is installed on the output end of the servo motor 10. A circular gear 12 is installed on the outer side of the rotating shaft 11. The circular gear 12 meshes with the rack 8. Support plates 13 are symmetrically installed at both ends of the top side of the connecting cavity 2. A trigger switch 14 is installed on one side of each support plate 13. The trigger switches 14 are used for the forward and reverse rotation of the servo motor 10, respectively.

[0024] A control panel 31 is installed on one side of the connecting cavity 2. The control panel 31 is electrically connected to the trigger switch 14 and the servo motor 10. The control panel 31 is used for signal transmission of the trigger switch 14 and operation control of the servo motor 10. During operation, in practical applications, the automatic reciprocating motion of the conveying pipe 5 and the spray nozzle 6 in the slide 3 cannot be realized, resulting in uneven distribution of the spray paint on the keyboard shell. The fixed-position spray nozzle 6 can only spray a specific area of ​​the keyboard shell, thereby reducing the overall quality of the plastic keyboard. First, one end of the feed pipe 7 is connected to the spray material tank. The paint flows into the conveying pipe 5 through the feed pipe 7, and then is sprayed out from the six spray nozzles 6 installed at equal intervals on the outside of the conveying pipe 5. During the spraying process, the servo motor 10 is started through the control panel 31. The rotating shaft 11 at the output end drives the circular gear 12 to rotate. Since the circular gear 12 meshes with the rack 8, the rotation of the circular gear 12 will drive the slider 4 to slide in the slide groove 3. When the slider 4 slides to one end of the top side of the connecting cavity 2, it will trigger the trigger switch 14. The trigger switch 14 transmits the signal to the control panel 31. After receiving the signal, the control panel 31 controls the servo motor 10 to reverse, so that the slider 4 slides in the opposite direction. Similarly, when the slider 4 slides to the other end, the trigger switch 14 at the other end is triggered, and the servo motor 10 reverses again. This cycle is repeated, realizing the reciprocating motion of the slider 4 and the conveying pipe 5 and spray nozzle 6 installed on its bottom side in the slide groove 3, ensuring that the paint is evenly sprayed on the outside of the keyboard shell. The specific model of the trigger switch 14 is ZB2-BE101C.

[0025] Please see Figure 1 , 2 As shown in Figures 4 and 5, a drive motor 15 is installed on the top side of the spray box 1. A rotating shaft 16 is installed at the output end of the drive motor 15. A turntable 17 is installed at the bottom end of the rotating shaft 16. The radius of the turntable 17 is less than or equal to the inner diameter of the spray box 1. Six connecting shafts 18 are equidistantly mounted inside the turntable 17. A gear 19 is installed at the top of each connecting shaft 18. A hook 20 is installed on the bottom side of each connecting shaft 18. A gear ring 21 is installed on the inner wall of the top of the spray box 1, and the gear 19 meshes with the gear ring 21.

[0026] The other end of the spray box 1 is connected to the mounting cavity 22. One side of the mounting cavity 22 is connected to the air inlet pipe 23. The air inlet pipe 23 is equipped with an electric heating mesh plate 24. Two negative pressure motors 25 are installed at equal intervals on the inner wall of the mounting cavity 22. Each of the negative pressure motors 25 has three fan blades 26 installed at its output end. The other side of the mounting cavity 22 extends into the interior of the spray box 1 and has a blowing groove 27.

[0027] The bottom side of the spray box 1 is connected to a discharge pipe 28, and a valve 29 is installed inside the discharge pipe 28;

[0028] A hinged door 30 is installed on one side of the spray box 1. The lowest point of the door 30 is higher than the height of the discharge pipe 28. During operation, the keyboard shell is frequently exposed to objects such as desktops, which can easily cause wear. Spraying a wear-resistant coating can increase the hardness and wear resistance of the shell. Therefore, a spraying device is needed. In some small keyboard manufacturers, the keyboard shell is suspended on the outside of the hook 20. The drive motor 15 is started, and the output shaft 16 drives the turntable 17 to rotate. Since the radius of the turntable 17 is less than or equal to the inner diameter of the spray box 1, the turntable 17 can rotate smoothly inside the spray box 1. When the turntable 17 rotates, the hook 20 also rotates. At the same time, when the turntable 17 drives the connecting shaft 18 to revolve, the connecting shaft 18 will rotate simultaneously due to the meshing of the gear 19 and the gear ring 21. In this way, the keyboard shell suspended on the hook 20 rotates while revolving, ensuring that the coating can be fully and evenly covered on the keyboard shell.

[0029] After the keyboard shell is coated, the electric heating mesh plate 24 starts to work and heats the incoming air. The negative pressure motor 25 starts and the three fan blades 26 installed at the output end of the negative pressure motor 25 rotate, blowing the air heated by the electric heating mesh plate 24 into the spray box 1 through the air blowing channel 27. The hot air flows in the spray box 1, quickly drying the coating on the keyboard shell and improving production efficiency.

[0030] During the spraying process, excess paint will accumulate at the bottom of the spray box 1. When cleaning is required, the valve 29 inside the discharge pipe 28 can be opened to discharge the excess paint and reduce waste.

[0031] Operators can open the movable door 30 to remove the keyboard casing hanging on the hook 20, or hang the keyboard casing to be sprayed on the hook 20, making it easy to open and close the movable door 30, thus facilitating the removal and placement of the keyboard casing.

[0032] Working principle: The keyboard shell is suspended on the outside of the hook 20. One end of the feed pipe 7 is connected to the spray material tank. The paint flows into the conveying pipe 5 through the feed pipe 7 and is then sprayed out from the six spray nozzles 6 installed at equal intervals on the outside of the conveying pipe 5. During the spraying process, the servo motor 10 is started through the control panel 31. The rotating shaft 11 at its output end drives the circular gear 12 to rotate. Since the circular gear 12 meshes with the rack 8, the rotation of the circular gear 12 will drive the slider 4 to slide in the slide groove 3. When the slider 4 slides to one end of the top side of the connecting cavity 2, it will trigger the trigger switch 14. The trigger switch 14 transmits the signal to the control panel 31. After receiving the signal, the control panel 31 controls the servo motor 10 to reverse, so that the slider 4 slides in the opposite direction. Similarly, when the slider 4 slides to the other end, the trigger switch 14 at the other end is triggered, and the servo motor 10 reverses again. This cycle is repeated to realize the reciprocating motion of the slider 4 and the conveying pipe 5 and spray nozzles 6 installed on its bottom side in the slide groove 3, ensuring that the paint is evenly sprayed on the outside of the keyboard shell.

[0033] Simultaneously, the drive motor 15 is started, and the output shaft 16 drives the turntable 17 to rotate. Since the radius of the turntable 17 is less than or equal to the inner diameter of the spray box 1, the turntable 17 can rotate smoothly inside the spray box 1. When the turntable 17 rotates, the hook 20 also rotates. At the same time, when the turntable 17 drives the connecting shaft 18 to revolve, due to the meshing of gear 19 and gear ring 21, the connecting shaft 18 will rotate on its own axis. In this way, the keyboard shell suspended on the hook 20 rotates on its own axis while revolving, ensuring that the paint can be fully and evenly covered on the keyboard shell.

[0034] After the keyboard shell is coated, the electric heating mesh plate 24 starts to work and heats the incoming air. The negative pressure motor 25 starts and the three fan blades 26 installed at the output end of the negative pressure motor 25 rotate, blowing the air heated by the electric heating mesh plate 24 into the spray box 1 through the air blowing channel 27. The hot air flows in the spray box 1, quickly drying the coating on the keyboard shell and improving production efficiency.

[0035] During the spraying process, excess paint will accumulate at the bottom of the spray box 1. When cleaning is required, the valve 29 inside the discharge pipe 28 can be opened to discharge the excess paint and reduce waste.

[0036] Operators can open the movable door 30 to remove the keyboard casing hanging on the hook 20, or hang the keyboard casing to be sprayed on the hook 20, making it easy to open and close the movable door 30, thus facilitating the removal and placement of the keyboard casing.

[0037] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A spraying device for plastic keyboards, characterized in that: The system includes a spray box (1), one end of which is connected to a connecting cavity (2). A groove (3) is provided on the top side of the connecting cavity (2). A slider (4) is slidably installed inside the groove (3). A conveying pipe (5) is installed on the bottom side of the slider (4). Six spray nozzles (6) are equidistantly installed on the outside of the conveying pipe (5). A feed pipe (7) is installed at the middle end of the conveying pipe (5). The feed pipe (7) slides through one side of the connecting cavity (2). One end of the feed pipe (7) is connected to the spraying material tank. A rack is installed on the top side of the slider (4). (8) A mounting plate (9) is installed on the outer side of the top of the spray box (1). A servo motor (10) is installed on the bottom side of the mounting plate (9). A rotating shaft (11) is installed at the output end of the servo motor (10). A circular gear (12) is installed on the outer side of the rotating shaft (11). The circular gear (12) meshes with the rack (8). Support plates (13) are symmetrically installed at both ends of the top side of the connecting cavity (2). A trigger switch (14) is installed on one side of each support plate (13). The trigger switches (14) are used for the forward and reverse rotation of the servo motor (10).

2. The spraying device for a plastic keyboard according to claim 1, characterized in that: A drive motor (15) is installed on the top side of the spray box (1). A rotating shaft (16) is installed at the output end of the drive motor (15). A turntable (17) is installed at the bottom end of the rotating shaft (16). The radius of the turntable (17) is less than or equal to the inner diameter of the spray box (1). Six connecting shafts (18) are equidistantly mounted inside the turntable (17). A gear (19) is installed at the top of each connecting shaft (18). A hook (20) is installed on the bottom side of each connecting shaft (18). A gear ring (21) is installed on the inner wall of the top of the spray box (1), and the gear (19) meshes with the gear ring (21).

3. The spraying device for a plastic keyboard according to claim 2, characterized in that: The other end of the spray box (1) is connected to the mounting cavity (22). One side of the mounting cavity (22) is connected to the air inlet pipe (23). The air inlet pipe (23) is equipped with an electric heating mesh plate (24). Two negative pressure motors (25) are installed at equal intervals on the inner wall of the mounting cavity (22). Each of the negative pressure motors (25) has three fan blades (26) installed at its output end. The other side of the mounting cavity (22) extends into the interior of the spray box (1) and is provided with a blowing groove (27).

4. The spraying device for a plastic keyboard according to claim 3, characterized in that: The bottom side of the spray box (1) is connected to a discharge pipe (28), and a valve (29) is installed inside the discharge pipe (28).

5. The spraying device for a plastic keyboard according to claim 4, characterized in that: A movable door (30) is installed on one side of the spray box (1) by means of a hinge. The lowest point of the movable door (30) is higher than the position of the discharge pipe (28).

6. The spraying device for a plastic keyboard according to claim 1, characterized in that: A control panel (31) is installed on one side of the connecting cavity (2). The control panel (31) is electrically connected to the trigger switch (14) and the servo motor (10). The control panel (31) is used for signal transmission to the trigger switch (14) and operation control of the servo motor (10).

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