A keyboard keycap defect detection device and detection method

Abstract

The present invention discloses a detection device and a detection method for keyboard keycap defects, which relates to the field of keycap defect detection, including a workbench, a detection frame is fixed on the workbench, a detection belt with cyclic motion is installed on the detection frame, keycap bayonet for clamping keycaps is arranged at intervals on the detection belt, the detection belt is connected with a rubber cap on the back of the keycap bayonet, the detection frame is provided with an extrusion sheet for extruding the rubber cap at the position where the keycap enters the detection belt, the detection frame is fixedly connected with a pressing plate for pressing the keycap into the keycap bayonet in the conveying direction of the keycap, and a first detection camera facing the detection belt is fixedly connected on the detection frame. The monolithic structure of the present invention uniformly adjusts the direction of the keycap, uses the cyclic motion detection belt to fix and convey the keycaps to be detected in sequence, respectively shoots the back and front of the keycap for detection, and finally classifies and collects qualified and unqualified keycaps, thereby realizing stable and efficient visual inspection of the keycaps.

Description

Technical Field

[0001] The invention relates to the field of keycap defect detection, and in particular to a keyboard keycap defect detection device and a detection method thereof. Background Art

[0002] Keycaps are an indispensable part of keyboards. During the production process, some keycaps are hollow inside or have missing parts on the outside, which affects their use. It is necessary to detect defects on the keycaps and remove unqualified ones in time to ensure product qualification rate and user typing experience.

[0003] A Chinese patent with related announcement number CN117169234B discloses a keyboard keycap defect detection device, including a base plate, a material distribution mechanism is arranged on the outside of the base plate, the material distribution mechanism includes a conveyor belt 1, the conveyor belt 1 is arranged on the outer surface of the base plate, a connecting plate is arranged on the frame of the conveyor belt 1, and a detection component is arranged on the outside of the connecting plate.

[0004] With respect to the above-mentioned related technologies, when the existing keycap defect detection equipment is performing keycap defect detection, the material dividing structure above the conveyor belt cannot unify the direction of the keycaps, and the keycaps are blocked by the inclined part of the guide strip on the conveyor belt and move toward the center. However, since the keycaps are generally in a square structure, when the two sides of the square keycaps respectively contact the junction of the inclined part and the vertical part of the two guide strips, the material is easily stuck, which affects the smooth progress of the keycap detection work. In addition, the detection components in the existing detection equipment have complicated detection steps for the keycaps, and the number of keycaps that can be detected per unit time is small. In summary, the detection efficiency of the existing keycap defect detection equipment is low. Summary of the invention

[0005] Based on this, the purpose of the present invention is to provide a keyboard keycap defect detection device and a detection method thereof, so as to solve the technical problem of low detection efficiency of the existing keycap defect detection device.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a keyboard keycap defect detection device, comprising a workbench, a detection frame is fixed on the workbench, a circulating detection belt is installed on the detection frame, keycap snap-ins for clamping keycaps are arranged at intervals on the detection belt, the detection belt is connected with a rubber cap on the back side of the keycap snap-in, the detection frame is provided with an extrusion sheet for extruding the rubber cap at the position where the keycap enters the detection belt, the detection frame is fixedly connected with a pressure plate for pressing the keycap into the keycap snap-in in the conveying direction of the keycap, and a first detection camera facing the detection belt is fixedly connected to the detection frame.

[0007] By adopting the above technical scheme, the orientation of the keycaps is uniformly adjusted through the whole material structure, and the keycaps to be inspected are fixed and transported in sequence by a circulating inspection belt. The back and front of the keycaps are photographed for inspection respectively, and finally qualified and unqualified keycaps are classified and collected, thereby achieving stable and efficient visual inspection of the keycaps.

[0008] The present invention is further configured as follows: a conveying platform is installed on one side of the detection frame on the workbench, and the workbench is fixedly connected to a feed hopper above the conveying platform, a vibrating bucket is slidably connected to the feed hopper in a vertical direction, a vibration motor is arranged in the vibrating bucket, and is connected to the feed hopper through a spring frame, a vertical material collecting platform is arranged at the bottom end of the vibrating bucket, the width of the inner wall of the material collecting platform is equal to the height of the key cap, and a discharge port is arranged at one end of the material collecting platform facing the detection frame, and when the vibrating bucket moves upward to the highest position, the distance between the top of the discharge port and the conveyor belt on the conveying platform is equal to the width of the key cap.

[0009] By adopting the above technical solution, the material table discharges the keycaps one by one during the vibration of the vibration bucket, so that the keycaps fall on the conveyor belt due to the deviation of their own center of gravity, unifying the direction of the keycaps so that the front of the keycaps faces the conveyor belt.

[0010] The present invention is further configured such that a fixed guide bar is fixedly connected to one side of the conveying platform, the fixed guide bar includes an inclined portion close to the vibration bucket and a vertical portion close to the detection frame, and a push bar is connected to the other side of the conveying platform, the push bar is driven by a structure capable of moving toward the vertical portion of the fixed guide bar, the push bar is parallel to the vertical portion of the fixed guide bar, and when the push bar is close to the vertical portion of the fixed guide bar, the distance between the push bar and the fixed guide bar is equal to the width of the key cap.

[0011] By adopting the above technical solution, the push bar reciprocates to push the keycaps on the conveyor belt, and while arranging the keycaps, the problem of the keycaps being stuck on the guide structure and unable to continue to be conveyed is effectively avoided.

[0012] The present invention is further configured such that a stopper is fixedly connected to one end of the detection frame facing the conveying platform, the interior of the stopper can allow the keycap to pass through, and a blocking cover is fixedly connected to the top, and guide slide rods are fixedly connected to both sides of the inner wall of the stopper, the spacing between the guide slide rods is smaller than the width of the keycap, and one end is close to the edge of the conveying platform, and the other end faces the detection belt.

[0013] By adopting the above technical solution, the stopper will enable the keycap to slide accurately onto the detection belt.

[0014] The present invention is further configured such that a blocking sheet for blocking the keycap is fixedly connected inside the blocking block, and the keycap in contact with the detection belt is blocked by the blocking sheet before falling into the keycap bayonet.

[0015] By adopting the above technical solution, the blocking sheet allows the keycaps to enter the keycap slots in sequence.

[0016] The present invention is further configured such that a detection platform is installed on the workbench at one end of the detection frame away from the conveying platform, two inclined sliding frames are fixedly connected to the detection platform, the top ends of the sliding frames are close to the detection belt, the spacing between the sliding frames is smaller than the width of the key caps, and the detection platform is provided with a second detection camera facing the sliding frames.

[0017] By adopting the above technical solution, after the keycap slides into the sliding frame, the side not photographed will be photographed by the second detection camera, and the other side of the keycap will be detected.

[0018] The present invention is further configured such that a rotating cylinder is installed on one side of the workbench and a classification rack is installed on the rotating shaft of the rotating cylinder, a first slide and a second slide are respectively provided on both sides of the rotating cylinder, and when the classification rack contacts the first slide, the top end of the classification rack faces the bottom end of the sliding rack.

[0019] By adopting the above technical solution, the classification rack rotates to make unqualified keycaps fall into the second slide.

[0020] The present invention is further configured such that two sides of the top end of the sliding frame are connected to the detection frame.

[0021] By adopting the above technical solution, the structural strength of the sliding frame is effectively improved, and deformation of the end of the sliding frame due to force is avoided.

[0022] The present invention is further configured such that the material-forming platform does not contact the conveyor belt on the conveyor platform.

[0023] By adopting the above technical solution, it is avoided that the vibrating bucket stops the conveyor belt when working.

[0024] A method for detecting defects of keyboard keycaps comprises the following steps:

[0025] Step 1: Pour keycaps of the same model into the feed hopper. The keycaps move downward in the vibrating hopper to the material table. When the vibrating hopper moves upward to the highest point, a keycap is released from the discharge port and falls face down onto the conveyor belt.

[0026] Step 2: The push bar moves back and forth under the drive of the telescopic cylinder. When the push bar approaches the fixed guide bar, the key caps between the two are neatly arranged along the conveying direction of the conveyor belt;

[0027] Step 3: The keycaps are transported to the guide slide on the conveyor belt. The frontmost keycap is pushed by other keycaps at the back and slides onto the guide slide. The frontmost keycap is continuously pushed by other keycaps at the back until it contacts the blocking sheet. When the keycap bayonet on the circularly moving detection belt corresponds to the keycap, the keycap descends and the bottom enters the keycap bayonet. At this time, the keycap entering the keycap bayonet is not blocked by the blocking sheet, and the keycap at the back continues to move forward to fill the position.

[0028] Step 4: When the keycap is about to be inserted into the keycap slot, the rubber cap on the detection tape is squeezed and deformed by the extrusion sheet, and the internal space of the rubber cap is reduced. When the keycap falls into the keycap slot, the rubber cap and the extrusion sheet are separated and restored to their original state. When the rubber cap is restored to its original state, negative pressure is generated to stably hold the keycap in the keycap slot;

[0029] Step 5: The keycap continues to be transported forward in the keycap bayonet. When passing through the pressure plate, the keycap that is not stably inserted into the keycap bayonet will contact the bottom surface of the pressure plate. In the process of the keycap continuing to be transported forward, the top surface of the keycap contacts the bottom surface of the pressure plate and is stably inserted into the keycap bayonet.

[0030] Step 6: When the keycap passes through the first detection camera, the first detection camera takes a photo of the keycap, and compares the photo with the pre-recorded photo of qualified products to determine whether the keycap is qualified. If the keycap is qualified, it will continue to be transported. If the keycap is unqualified, the rotating cylinder will be delayed for a set time and rotate once;

[0031] Step 7: After the side of the keycap contacts the sliding frame, the keycap slides into the sliding frame. As the detection belt continues to move, the detection belt moves downward, and the keycap is slidably connected to the sliding frame. The keycap in the keycap bayonet is pulled out. During the sliding process along the sliding frame, the second detection camera similarly shoots and detects the other side of the keycap. If the keycap is qualified, it slides down along the classification frame to the first slide. If it is unqualified, the cylinder is rotated to drive the classification frame to rotate. After the keycap slides out of the sliding frame, it hits the classification frame and then falls into the second slide.

[0032] In summary, the present invention mainly has the following beneficial effects:

[0033] 1. The present invention uniformly adjusts the orientation of the keycaps through the monolithic structure, uses a circularly moving detection belt to sequentially fix and transport the keycaps to be detected, respectively photographs the back and front of the keycaps for detection, and finally classifies and collects qualified and unqualified keycaps, thereby achieving stable and efficient visual detection of the keycaps;

[0034] 2. The present invention sets a material table with a width equal to the height of the keycap below the vibration bucket, and sets a discharge port at one end of the material table. When the vibration bucket moves to the highest point, the distance between the top of the discharge port and the conveyor belt is equal to the width of the keycap. After the keycap falls into the material table, the bottom edge contacts the conveyor belt and before the vibration bucket moves to the highest point, the keycap is restricted by the inner wall of the material table and slides with the conveyor belt until the vibration bucket moves upward to the highest point. Only then can a keycap be conveyed out. The keycap is affected by its own center of gravity and falls face down on the conveyor belt and moves along the conveying direction of the conveyor belt. As the vibration bucket vibrates up and down, the keycaps are output one by one, so that the direction of the keycaps can be unified conveniently.

[0035] 3. The present invention arranges a fixed guide bar and a push bar on the conveying platform. The fixed guide bar guides the keycaps, and the push bar is used to push the keycaps toward the fixed guide bar. When the push bar is in an extended state, the distance between the push bar and the vertical part of the fixed guide bar is equal to the width of the keycaps, thereby conveniently arranging the keycaps neatly along the conveying direction and preventing the occurrence of material jamming.

[0036] 4. The present invention clamps the keycaps through the keycap clamping holes on the detection belt, and the rubber caps fixed at the keycap clamping holes on the back of the detection belt shrink and deform under the extrusion of the extrusion sheet, and the keycap clamping holes are restored when the keycaps are clamped into the keycaps to generate negative pressure, thereby more stably fixing the keycaps at the designated positions of the detection belt;

[0037] 5. The present invention installs a pressure plate structure on the detection frame. After the keycap is fixed at a designated position on the detection belt, it moves with the circulation of the detection belt and contacts the pressure plate during the movement. The pressure plate flattens the keycap so that the back of the keycap can face vertically upward, which is convenient for the detection camera to perform accurate camera detection on the keycap.

[0038] 6. The present invention sets a sliding frame at the tail end of the detection belt, and uses the sliding frame to guide the keycap when the detection belt is deformed and the keycap clip is separated from the keycap. The sliding rod on the sliding frame contacts the two inclined surfaces on the front side of the keycap respectively, and guides the keycap to slide along the sliding frame. When the keycap slides past the detection camera, the other side of the keycap can be photographed and detected. Finally, qualified and unqualified keycaps are classified through the classification frame under the sliding frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A perspective view of the present invention;

[0040] Figure 2 It is a three-dimensional diagram of the internal structure of the present invention;

[0041] Figure 3 For the present invention Figure 2 A magnified view of middle;

[0042] Figure 4 A three-dimensional diagram of the classification rack of the present invention in a rotating state;

[0043] Figure 5 For the present invention Figure 4 Enlarged view of middle B;

[0044] Figure 6 It is a three-dimensional diagram of the internal structure of the feed hopper of the present invention;

[0045] Figure 7 For the present invention Figure 6 Enlarged view of middle C;

[0046] Figure 8 For the present invention Figure 6 Enlarged view of middle D;

[0047] Fig. 9 This is a three-dimensional diagram of the detection belt structure of the present invention with one side of the roller removed.

[0048] In the figure: 1. workbench; 2. feed hopper; 3. vibration hopper; 301. vibration motor; 302. spring frame; 303. material table; 304. discharge port; 4. conveyor table; 5. detection frame; 501. detection belt; 502. key cap snap-on; 503. rubber cap; 6. block; 601. blocking cover; 602. guide slide rod; 603. blocking sheet; 7. extrusion sheet; 8. pressure plate; 9. detection table; 10. rotating cylinder; 11. classification frame; 12. first slide; 13. second slide; 14. fixed guide strip; 15. push strip; 16. first detection camera; 17. second detection camera; 18. sliding frame. DETAILED DESCRIPTION

[0049] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0050] The following describes an embodiment of the present invention based on its overall structure.

[0051] Embodiment 1

[0052] A keyboard keycap defect detection device, such as Figure 1-9As shown, it includes a workbench 1, on which is fixed a detection frame 5, on which is installed a detection belt 501 which circulates, and on which are arranged keycap snap-ons 502 for clamping keycaps at intervals. Specifically, the workbench 1 is provided with a feeding structure in front of the detection belt 501, which specifically adopts a multi-axis mechanical arm to clamp the keycaps and insert the keycaps into the corresponding keycap snap-ons 502. The detection belt 501 is connected with a rubber cap 503 on the back side of the keycap snap-ons 502, and the detection frame 5 is provided with an extrusion sheet 7 for extruding the rubber cap 503 at the position where the keycap enters the detection belt 501. The detection frame 5 is fixedly connected with a pressing plate 8 for pressing the keycap into the keycap snap-ons 502 in the conveying direction of the keycap, and the detection frame 5 is fixedly connected with a first detection camera 16 facing the detection belt 501. Specifically, the first detection camera 16 is used to photograph the back side of the keycap.

[0053] See also Figure 2-5 , an inspection table 9 is installed on the workbench 1 at one end of the inspection frame 5 away from the conveying table 4, and two inclined sliding frames 18 are fixedly connected to the inspection table 9. The top ends of the sliding frames 18 are close to the inspection belt 501, and the spacing between the sliding frames 18 is smaller than the width of the keycap. When the keycap contacts the sliding frame 18, the two inclined side edges of the front of the keycap are respectively in contact with the two sliding frames 18. The inspection table 9 is provided with a second inspection camera 17 facing the sliding frame 18. Specifically, the second inspection camera 17 is used to photograph the front of the keycap. After the keycap slides into the sliding frame 18, the second inspection camera 17 will photograph the unphotographed side of the keycap, and the other side of the keycap will be inspected. The two sides of the top of the sliding frame 18 are connected to the inspection frame 5, which effectively improves the structural strength of the sliding frame 18 and avoids the deformation of the end of the sliding frame 18 under stress.

[0054] See also Figure 2-5 The workbench 1 is provided with a rotating cylinder 10 on one side of the inspection table 9, and a classification rack 11 is provided on the rotating shaft of the rotating cylinder 10, and a first slide 12 and a second slide 13 are respectively provided on both sides of the rotating cylinder 10. Specifically, when the classification rack 11 is not rotating, the qualified keycaps can be guided to the first slide 12, and after the rotating cylinder 10 drives the classification rack 11 to rotate, the unqualified keycaps fall and hit the classification rack 11 and then fall into the second slide 13. When the classification rack 11 contacts the first slide 12, the top end of the classification rack 11 faces the bottom end of the sliding rack 18, and the classification rack 11 rotates to make the unqualified keycaps fall into the second slide 13. Specifically, the top end of the first slide 12 plays a role in limiting the rotation of the classification rack 11. When the classification rack 11 is rotating and resetting, the resetting is completed when the end hits the top end of the first slide 12.

[0055] Embodiment 2

[0056] A keyboard keycap defect detection device, such as Figure 1-9As shown, on the basis of the first embodiment, the difference from the first embodiment is that the workbench 1 is equipped with a conveying platform 4 on one side of the detection frame 5, the workbench 1 is fixedly connected with a feed hopper 2 above the conveying platform 4, the feed hopper 2 is slidably connected with a vibration bucket 3 in the vertical direction, a vibration motor 301 is arranged in the vibration bucket 3, and is connected to the feed hopper 2 through a spring frame 302, and a vertical material-forming platform 303 is arranged at the bottom end of the vibration bucket 3, specifically, the height of the material-forming platform 303 is greater than the width of the key cap, and the width of the inner wall of the material-forming platform 303 is equal to the width of the key cap. The height of the keycaps, a discharging port 304 is provided at one end of the material platform 303 facing the detection frame 5, when the vibration bucket 3 moves upward to the highest position, the distance between the top of the discharging port 304 and the conveyor belt on the conveyor platform 4 is equal to the width of the keycaps, and the material platform 303 discharges the keycaps one by one during the vibration of the vibration bucket 3, so that the keycaps fall on the conveyor belt due to the deviation of their own center of gravity, unify the direction of the keycaps, make the front of the keycaps face the conveyor belt, and the material platform 303 does not contact the conveyor belt on the conveyor platform 4, so as to avoid the vibration bucket 3 pressing and stopping the conveyor belt when working.

[0057] See also Figure 2-8 A fixed guide bar 14 is fixedly connected to one side of the conveying platform 4, and the fixed guide bar 14 includes an inclined portion close to the vibration bucket 3 and a vertical portion close to the detection frame 5. A pushing bar 15 is connected to the other side of the conveying platform 4, and the pushing bar 15 is driven by the structure to move toward the vertical portion of the fixed guide bar 14. Specifically, a telescopic cylinder is installed on the conveying platform 4 for controlling the reciprocating motion of the pushing bar 15. Specifically, the pushing bar 15 is an L-shaped structure, and a blocking portion for blocking the keycaps is provided at one end facing the vibration bucket 3 to prevent the keycaps on the conveyor belt from moving to the rear of the pushing bar 15 and being pushed out of the conveyor belt. The pushing bar 15 is parallel to the vertical portion of the fixed guide bar 14. When the pushing bar 15 is close to the vertical portion of the fixed guide bar 14, the distance between it and the fixed guide bar 14 is equal to the width of the keycaps. The pushing bar 15 reciprocates to push the keycaps on the conveyor belt, and while arranging the keycaps, it effectively avoids the problem that the keycaps are stuck in the guide structure and cannot be transported further.

[0058] See also Figure 4-8, a stopper 6 is fixedly connected to one end of the detection frame 5 facing the conveying platform 4, the interior of the stopper 6 can allow the keycap to pass through, and a blocking cover 601 is fixedly connected to the top, the blocking cover 601 is used to prevent the front keycap from being lifted up by the thrust of the rear keycap, and at the same time it can also play a role in stabilizing the structure on both sides of the stopper 6, both sides of the inner wall of the stopper 6 are fixedly connected with guide slides 602, the spacing of the guide slides 602 is smaller than the width of the keycap, and one end of the guide slides 602 is close to the edge of the conveying platform 4, and the other end faces the detection belt 501, the stopper 6 will make the keycap accurately slide onto the detection belt 501, and a blocking sheet 603 for blocking the keycap is fixedly connected to the inside of the stopper 6, the keycap in contact with the detection belt 501 is blocked by the blocking sheet 603 before falling into the keycap bayonet 502, and the blocking sheet 603 allows the keycap to enter the keycap bayonet 502 in sequence.

[0059] A method for detecting defects of keyboard keycaps comprises the following steps:

[0060] Step 1: Pour keycaps of the same model into the feed hopper 2, and the vibration motor 301 in the vibration hopper 3 works to make the vibration hopper 3 vibrate in the vertical direction. Specifically, the vibration hopper 3 slides up and down and is connected to the feed hopper 2, and both sides are connected to the feed hopper 2 through the spring frame 302. Therefore, when the vibration motor 301 is working, the vibration hopper 3 will move up and down, and the keycaps will move downward in the vibration hopper 3 to the material table 303. At this time, the front and back sides of the keycaps are respectively facing the two sides of the material table 303, and one of the side edges is in contact with the conveying frame on the conveying table 4. The side edge slides and rubs relative to the conveyor belt. When the vibration hopper 3 moves upward to the highest point, the discharge port 304 releases a keycap. Specifically, the keycaps in the material table 303 are pushed out by the friction force of the conveyor belt. When the vibration hopper 3 reciprocates up and down, the keycaps can be sent out from the discharge port 304 one by one. The keycaps move along the conveying direction of the conveyor belt and are affected by their own center of gravity and fall face down on the conveyor belt.

[0061] Step 2: The push bar 15 reciprocates under the drive of the telescopic cylinder, and the inclined part of the fixed guide bar 14 guides the keycaps. When the push bar 15 moves toward the fixed guide bar 14, it can push the keycaps on the conveyor belt toward the vertical part of the fixed guide bar 14. When the push bar 15 approaches the fixed guide bar 14, the keycaps between the two are neatly arranged along the conveying direction of the conveyor belt, and then accurately sent to the detection belt 501;

[0062] Step 3: The keycaps are conveyed to the guide slide 602 on the conveyor belt. The frontmost keycap is pushed by other keycaps at the back and slides onto the guide slide 602. The two inclined side surfaces of the front of the keycap contact the guide slide 602. The frontmost keycap is continuously pushed by other keycaps at the back until it contacts the blocking sheet 603. At this time, the bottom of the keycap contacts the detection belt 501. When the keycap bayonet 502 on the circularly moving detection belt 501 corresponds to the keycap, the keycap descends so that the bottom enters the keycap bayonet 502. Specifically, the width of the keycap bayonet 502 is smaller than the width of the keycap, but larger than the width of the printed surface of the keycap. At this time, the keycap entering the keycap bayonet 502 is not blocked by the blocking sheet 603, and the keycap at the back continues to move forward to fill the position.

[0063] Step 4: When the keycap is about to be inserted into the keycap bayonet 502, the rubber cap 503 on the detection belt 501 is squeezed by the squeezing sheet 7 and deformed, and the internal space of the rubber cap 503 is reduced. When the keycap falls into the keycap bayonet 502, the rubber cap 503 is separated from the squeezing sheet 7 and restored to its original state. Since the keycap blocks the keycap bayonet 502 at this time, negative pressure is generated when the rubber cap 503 is restored to its original state, so that the keycap is stably held in the keycap bayonet 502, thereby preventing the keycap from falling off the detection belt 501 during the conveying process. After the keycap is fixed, it is convenient for the first detection camera 16 to shoot and detect the keycap.

[0064] Step 5: The keycap continues to be transported forward in the keycap bayonet 502. When passing through the pressing plate 8, the keycap that is not stably inserted into the keycap bayonet 502 will contact the bottom surface of the pressing plate 8. In the process of the keycap continuing to be transported forward, the top surface of the keycap contacts the bottom surface of the pressing plate 8 and is stably inserted into the keycap bayonet 502. Specifically, in order to prevent the pressing plate 8 from ejecting the keycap from the keycap bayonet 502, an oblique chamfer is provided on the bottom surface of the pressing plate 8 facing the direction of the keycap.

[0065] Step 6: When the keycaps pass through the first detection camera 16, the first detection camera 16 takes a photo of the keycaps, and compares the taken photo with the pre-recorded photos of qualified products to determine whether the keycaps are qualified. If the keycaps are qualified, they continue to be transported. If the keycaps are unqualified, the rotating cylinder 10 is delayed for a set time and rotates once. Specifically, the delay time of the rotating cylinder 10 is determined according to the time it takes for the keycaps at the location photographed by the first detection camera 16 to move to the classification rack 11;

[0066] Step seven: After the side of the keycap contacts the sliding frame 18, the keycap slides into the sliding frame 18. As the detection belt 501 continues to move, the detection belt 501 moves downward, and the keycap is slidably connected to the sliding frame 18. The keycap in the keycap bayonet 502 is pulled out. During the sliding process along the sliding frame 18, the second detection camera 17 similarly shoots and detects the other side of the keycap. If the keycap is qualified, it slides down along the classification frame 11 to the first slide 12. If it is unqualified, the rotating cylinder 10 drives the classification frame 11 to rotate. After the keycap slides out of the sliding frame 18, it hits the classification frame 11 and then falls into the second slide 13.

[0067] The working principle of the present invention is as follows: keycaps of the same model are poured into the feed hopper 2, the vibration motor in the vibration hopper 3 works to make the vibration hopper 3 vibrate in the vertical direction, and the keycaps move downward in the vibration hopper 3 to the material table 303. At this time, the front and back sides of the keycaps face the two sides of the material table 303 respectively, and one of the side edges contacts the conveying frame on the conveying table 4. When the vibration hopper 3 moves upward to the highest point, the discharge port 304 releases a keycap, and the keycap moves along the conveying direction of the conveyor belt, and under the influence of its own center of gravity, it falls face down on the conveyor belt, and the push bar 15 reciprocates under the drive of the telescopic cylinder, and the inclined part of the fixed guide bar 14 guides the keycaps. When the push bar 15 moves toward the fixed guide bar 14, it can push the keycaps on the conveyor belt to the vertical part of the fixed guide bar 14. When the push bar 15 is close to the fixed guide bar 14, the keycaps between the two are neatly arranged along the conveying direction of the conveyor belt.

[0068] The keycaps are conveyed to the guide slide 602 on the conveyor belt. The frontmost keycap is pushed by other keycaps at the back and slides onto the guide slide 602. The two inclined side surfaces of the front of the keycap contact the guide slide 602. The frontmost keycap is continuously pushed by other keycaps at the back until it contacts the blocking sheet 603. At this time, the bottom of the keycap contacts the detection belt 501. When the keycap bayonet 502 on the circularly moving detection belt 501 corresponds to the keycap, the keycap descends to allow the bottom to enter the keycap bayonet 502. At this time, the keycap entering the keycap bayonet 502 is not blocked by the blocking sheet 603, and the keycap at the back continues to move forward to fill the position.

[0069] When the keycap is about to be inserted into the keycap slot 502, the rubber cap 503 on the detection belt 501 is squeezed by the squeezing sheet 7 and deformed, and the internal space of the rubber cap 503 is reduced. When the keycap falls into the keycap slot 502, the rubber cap 503 breaks contact with the squeezing sheet 7 and returns to its original state. Since the keycap blocks the keycap slot 502 at this time, negative pressure is generated when the rubber cap 503 returns to its original state, so that the keycap is stably held in the keycap slot 502. The keycap continues to be transported forward in the keycap slot 502. When passing through the pressing plate 8, the keycap that is not stably inserted into the keycap slot 502 will contact the bottom surface of the pressing plate 8. In the process of the keycap continuing to be transported forward, the top surface of the keycap contacts the bottom surface of the pressing plate 8 and is stably stuck in the keycap slot 502.

[0070] When the keycap passes through the first detection camera 16, the first detection camera 16 takes a photo of the keycap, and compares the photo with the pre-recorded photo of qualified products to determine whether the keycap is qualified. If the keycap is qualified, it will continue to be transported. If the keycap is unqualified, the rotating cylinder 10 will be delayed for a set time and rotated once. After the side of the keycap contacts the sliding frame 18, the keycap slides into the sliding frame 18. As the detection belt 501 continues to move, the detection belt 501 moves downward, and the keycap is slidably connected to the sliding frame 18, and the keycap in the keycap bayonet 502 is pulled out. During the sliding process along the sliding frame 18, the second detection camera 17 similarly takes a photo and detects the other side of the keycap. If the keycap is qualified, it will slide down along the classification frame 11 to the first slide 12, and if it is unqualified, the rotating cylinder 10 will drive the classification frame 11 to rotate, and the keycap slides out of the sliding frame 18 and hits the classification frame 11 and then falls into the second slide 13.

[0071] Although an embodiment of the present invention has been shown and described, this specific embodiment is only an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiments without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A keyboard keycap defect detection device, comprising a workbench (1), characterized in that: The workbench (1) is fixed with a detection frame (5), a detection belt (501) that moves in a circular motion is installed on the detection frame (5), keycap bayonet holes (502) for clamping keycaps are arranged at intervals on the detection belt (501), the detection belt (501) is connected with a rubber cap (503) on the back side of the keycap bayonet hole (502), the detection frame (501) is provided with an extrusion sheet (7) for squeezing the rubber cap (503) at the position where the keycap enters the detection frame (501), the detection frame (5) is fixedly connected with a pressing plate (8) for pressing the keycap into the keycap bayonet hole (502) in the conveying direction of the keycap, the detection frame (5) is fixedly connected with a first detection camera (16) facing the detection belt (501), and the workbench (1) A conveying platform (4) is installed on one side of the detection frame (5), and the workbench (1) is fixedly connected to a feed hopper (2) above the conveying platform (4). A vibration bucket (3) is slidably connected to the feed hopper (2) in a vertical direction. A vibration motor (301) is arranged in the vibration bucket (3), and the vibration bucket (3) is connected to the feed hopper (2) through a spring frame (302). A vertical material-forming platform (303) is arranged at the bottom end of the vibration bucket (3), and the width of the inner wall of the material-forming platform (303) is equal to the height of the key cap. A discharge port (304) is arranged at one end of the material-forming platform (303) facing the detection frame (5). When the vibration bucket (3) moves upward to the highest position, the top of the discharge port (304) is in contact with the conveyor belt on the conveying platform (4). The spacing is equal to the width of the keycap, the material-forming platform (303) does not contact the conveyor belt on the conveying platform (4), one side of the conveying platform (4) is fixedly connected with a fixed guide bar (14), the fixed guide bar (14) includes an inclined portion close to the vibration bucket (3) and a vertical portion close to the detection frame (5), the other side of the conveying platform (4) is connected with a push bar (15), the push bar (15) is driven by a structure capable of moving toward the vertical portion of the fixed guide bar (14), the push bar (15) and the vertical portion of the fixed guide bar (14) are parallel to each other, when the push bar (15) is close to the vertical portion of the fixed guide bar (14), the spacing between the push bar (15) and the fixed guide bar (14) is equal to the width of the keycap, the detection frame (5) A stopper (6) is fixedly connected to one end facing the conveying platform (4), the interior of the stopper (6) is capable of allowing keycaps to pass through, and a blocking cover (601) is fixedly connected to the top end, and guide slide rods (602) are fixedly connected to both sides of the inner wall of the stopper (6), the spacing of the guide slide rods (602) is smaller than the width of the keycaps, and one end of the guide slide rods (602) is close to the edge of the conveying platform (4), and the other end faces the detection belt (501), and a blocking sheet (603) for blocking the keycaps is fixedly connected to the inside of the stopper (6), and the keycaps contacting the detection belt (501) are blocked by the blocking sheet (603) before falling into the keycap bayonet (502), and the workbench (1) is installed with a detection table (9) at the end of the detection frame (5) away from the conveying platform (4),Two inclined sliding frames (18) are fixedly connected to the detection platform (9), the top ends of the sliding frames (18) are close to the detection belt (501), the spacing between the sliding frames (18) is smaller than the width of the key cap, and the detection platform (9) is provided with a second detection camera (17) facing the sliding frames (18).

2. The keyboard keycap defect detection device according to claim 1, characterized in that: The workbench (1) is provided with a rotating cylinder (10) on one side of the detection platform (9), and a classification frame (11) is provided on the rotating shaft of the rotating cylinder (10), and a first slideway (12) and a second slideway (13) are provided on both sides of the rotating cylinder (10), and when the classification frame (11) contacts the first slideway (12), the top end of the classification frame (11) faces the bottom end of the sliding frame (18).

3. The keyboard keycap defect detection device according to claim 1, characterized in that: Both sides of the top end of the sliding frame (18) are connected to the detection frame (5).

4. A detection method for detecting defects of keyboard keycaps, characterized in that The keyboard keycap defect detection device according to any one of claims 1 to 3 comprises the following steps: Step 1: Pour keycaps of the same model into the feed hopper (2), and the keycaps move downward in the vibration hopper (3) to the material handling table (303). When the vibration hopper (3) moves upward to the highest point, a keycap is released from the discharge port (304), and the keycaps fall face down onto the conveyor belt; Step 2: The push bar (15) moves back and forth under the drive of the telescopic cylinder. When the push bar (15) approaches the fixed guide bar (14), the key caps between the two are neatly arranged along the conveying direction of the conveyor belt; Step 3: The keycaps are conveyed to the guide slide bar (602) on the conveyor belt, and the keycap at the front is pushed by other keycaps at the back and slides onto the guide slide bar (602). The keycap at the front is continuously pushed by other keycaps at the back until it contacts the blocking sheet (603). When the keycap retaining hole (502) on the circularly moving detection belt (501) corresponds to the keycap, the keycap descends so that the bottom enters the keycap retaining hole (502). At this time, the keycap entering the keycap retaining hole (502) is not blocked by the blocking sheet (603), and the keycap at the back continues to move forward to fill the position. Step 4: When the keycap is about to be inserted into the keycap slot (502), the rubber cap (503) on the detection belt (501) is squeezed by the squeezing sheet (7) and deformed, and the internal space of the rubber cap (503) is reduced. When the keycap falls into the keycap slot (502), the rubber cap (503) and the squeezing sheet (7) are separated and restored to their original state. When the rubber cap (503) is restored to its original state, negative pressure is generated to stably hold the keycap in the keycap slot (502); Step 5: The keycap continues to be transported forward in the keycap snap-in (502). When passing through the pressing plate (8), the keycap that is not stably inserted into the keycap snap-in (502) will contact the bottom surface of the pressing plate (8). During the process of the keycap continuing to be transported forward, the top surface of the keycap contacts the bottom surface of the pressing plate (8) and is stably inserted into the keycap snap-in (502); Step 6: When the keycap passes through the first detection camera (16), the first detection camera (16) takes a photo of the keycap, and compares the photographed photo with the pre-recorded photo of qualified products to determine whether the keycap is qualified. If the keycap is qualified, it continues to be transported; if the keycap is unqualified, the rotating cylinder (10) is delayed for a set time and rotates once; Step 7: After the side of the keycap contacts the sliding frame (18), the keycap slides into the sliding frame (18). As the detection belt (501) continues to move, the detection belt (501) moves downward, and the keycap is slidably connected to the sliding frame (18). The keycap in the keycap bayonet (502) is pulled out. During the sliding process along the sliding frame (18), the second detection camera (17) similarly photographs and detects the other side of the keycap. If the keycap is qualified, it slides down along the classification frame (11) to the first slideway (12). If it is unqualified, the rotating cylinder (10) drives the classification frame (11) to rotate. After the keycap slides out of the sliding frame (18), it hits the classification frame (11) and then falls into the second slideway (13).

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