LED nixie tube detection device

Abstract

The utility model relates to an LED nixie tube detection device which comprises a rack, the rack is provided with a limiting strip used for containing a nixie tube, probes are arranged on the two sides of the limiting strip in the width direction, and the probes on the two sides of the limiting strip are connected with driving parts. The driving part is used for driving the probe to move so that the probe can be close to or away from a pin of the nixie tube, an image obtaining part is arranged above the limiting strip and electrically connected with a controller, the controller is electrically connected with a display part, and the image obtaining part is used for photographing the nixie tube and outputting image information. And the controller is used for receiving the image information and controlling the display part to display the picture of the nixie tube. The method has the following effects that the quality of each LED of the nixie tube can be conveniently detected, so that the detection efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of LED testing equipment, and in particular to an LED digital tube testing device. Background Technology

[0002] An LED digital tube is a digital display device, typically composed of seven LEDs, capable of displaying numbers, letters, and symbols. LED digital tubes are widely used in electronic computers, electronic clocks, electronic scales, electronic thermometers, and measuring instruments. Each LED on an LED digital tube represents a different part of a number, numbered a, b, c, d, e, f, and g from the most significant digit to the least significant digit. By controlling the on / off state of these LEDs, different numbers, letters, and symbols can be displayed.

[0003] LED digital tubes require testing after production. Chinese utility model application CN202221749306.3 discloses a testing device for digital tubes, including a housing with a through groove on the top. Vertical plates are fixed to both ends of the top of the housing, and an auxiliary mechanism is provided on the top of the housing. Testing mechanisms are located on the two vertical plates. This testing device uses two cylinders in the auxiliary mechanism to hold the two ends of the digital tube. Rotating bolts secures the ends of the digital tubes to the cylinders. A first motor is connected to an external power supply. The first motor, through the transmission of a first gear and a second gear, drives the corresponding cylinders to rotate synchronously. The rotation of the two cylinders drives the digital tubes fixed on them to rotate. Combined with a camera, the device can perform comprehensive testing of the digital tubes, making it quite convenient.

[0004] When LED digital tubes are tested using the aforementioned testing device, only the appearance of the digital tube can be inspected, making it difficult to inspect the quality of each LED in the digital tube, resulting in low testing efficiency. Utility Model Content

[0005] In order to facilitate the quality inspection of each LED of a digital tube and improve the inspection efficiency, this application provides an LED digital tube inspection device.

[0006] This application provides an LED digital tube testing device, which adopts the following technical solution:

[0007] An LED digital tube testing device includes a frame with a limiting strip for placing the digital tube. Probes for energizing the digital tube are arranged on both sides of the limiting strip along its width. Each probe on both sides of the limiting strip is connected to a driving component, which drives the probe to move closer to or further away from the pins of the digital tube. An image acquisition component is arranged above the limiting strip, electrically connected to a controller, and electrically connected to a display component. The image acquisition component takes a picture of the digital tube and outputs image information. The controller receives the image information and controls the display component to display the picture of the digital tube.

[0008] By adopting the above technical solution, the digital tube is placed on the limiting bar with the two rows of pins of the digital tube located on both sides of the limiting bar. The driving component drives the probes on both sides of the limiting bar to move. The probes approach and contact the pins of the digital tube, the digital tube is powered on, and each LED of the digital tube lights up. The image acquisition component takes a picture of the digital tube, and the picture of the digital tube is displayed on the display component. The staff can observe the picture displayed on the display component, thereby judging the quality of each LED of the digital tube. This facilitates the quality inspection of each LED of the digital tube and improves the inspection efficiency.

[0009] Preferably, the driving component includes a moving block and a cylinder, the moving block is connected to the piston rod end of the cylinder, and the probe is connected to the moving block.

[0010] By adopting the above technical solution, the cylinder can push and pull the moving block, thereby causing the moving block to move the probe closer to or away from the pin of the digital tube, thereby energizing or de-energizing the digital tube.

[0011] Preferably, the probe includes a fixed section and a telescopic section. The fixed section is connected to the movable block. One end of the telescopic section is located in the fixed section and is slidably connected to the fixed section along the length direction of the fixed section. An elastic element is provided in the fixed section, and one end of the telescopic section located in the fixed section is connected to the elastic element.

[0012] By adopting the above technical solution, when the moving block drives the probe to approach and contact the pin of the digital tube, the telescopic section can squeeze the elastic element, thereby allowing the telescopic section to slide into the fixed section, thus minimizing the risk of the probe damaging the pin of the digital tube when it contacts the pin.

[0013] Preferably, the frame is provided with a detection chamber, the image acquisition device and the probe are both located in the detection chamber, the detection chamber has an entrance and exit on one side, the frame is provided with a guide rod, one end of the guide rod is located in the detection chamber, and the other end of the guide rod passes through the entrance and exit and is located outside the detection chamber. The length direction of the limiting strip is consistent with the length direction of the guide rod, and the limiting strip is slidably connected to the guide rod along the length direction of the guide rod by a moving part.

[0014] By adopting the above technical solution, the moving part moves the limiting strip along the length of the guide rod to the outside of the testing room. The staff can place the digital tube on the limiting strip, and the moving part moves the limiting strip along the length of the guide rod to the testing room. In this way, the digital tube can be powered on by the probe, and the image acquisition component can acquire a picture of the digital tube.

[0015] Preferably, the guide rod has an elongated hole, the length direction of which is consistent with the length direction of the guide rod. The moving component is located below the guide rod and includes a lead screw, a guide rod, a slider, and a servo motor. The length directions of the lead screw and the guide rod are both consistent with the length direction of the guide rod. The output shaft of the servo motor is connected to one end of the lead screw. One end of the slider is slidably sleeved on the guide rod, and the other end of the slider is threaded onto the lead screw. A connecting rod is connected to the top of the slider, and one end of the connecting rod passes through the elongated hole and is connected to the limiting strip.

[0016] By adopting the above technical solution, the servo motor can drive the lead screw to rotate in both directions, thereby enabling the slider to move back and forth along the guide rod. The slider drives the limit bar to move on the guide rod through the connecting rod, thereby enabling the limit bar to move to the detection chamber or to the outside of the detection chamber.

[0017] Preferably, the bottom of the limiting strip is provided with an insertion groove, a first magnetic block is provided in the insertion groove, a second magnetic block is provided at one end of the connecting rod, the connecting rod is inserted into the bottom of the limiting strip through the insertion groove, and the first magnetic block and the second magnetic block are attracted to each other.

[0018] By adopting the above technical solution, the limiting strip is detachably connected to the connecting rod via the first magnetic block, the second magnetic block, and the first magnetic block. This facilitates the disassembly and installation of the limiting strip and the connecting rod. After the limiting strip is disassembled, it is easy to place the digital tube on the limiting strip.

[0019] Preferably, the bottom of the limiting strip is provided with a guide groove, the length direction of the guide groove is consistent with the length direction of the limiting strip, and the top of the guide rod is inserted into the bottom of the limiting strip through the guide groove.

[0020] By adopting the above technical solution, the limiting strip moves along the length of the guide rod through the guide groove, which can improve the stability of the limiting strip on the guide rod and minimize the risk of the digital tube falling off the limiting strip when it moves.

[0021] Preferably, limit blocks are provided at both ends of the limiting strip.

[0022] By adopting the above technical solution, the limiting strip can hold multiple digital tubes, and the limiting block can limit the digital tubes, thus minimizing the risk of the digital tubes falling off the limiting strip.

[0023] In summary, this application includes at least one of the following beneficial technical effects:

[0024] 1. The digital tube is placed on the limiting bar with its two rows of pins positioned on both sides of the limiting bar. The driving unit drives the probes on both sides of the limiting bar to move. The probes approach and contact the pins of the digital tube, energizing it. Each LED of the digital tube emits light. The image acquisition unit takes a picture of the digital tube, and the picture is displayed on the display unit. The operator can observe the picture displayed on the display unit to judge the quality of each LED of the digital tube. This facilitates the quality inspection of each LED of the digital tube and improves the inspection efficiency.

[0025] 2. When the moving block moves the probe close to and contacts the pin of the digital tube, the telescopic section can squeeze the elastic element, thereby allowing the telescopic section to slide into the fixed section, thus minimizing the risk of the probe damaging the pin of the digital tube when it comes into contact with the pin.

[0026] 3. The limiting strip moves along the length of the guide rod through the guide groove, which can improve the stability of the limiting strip on the guide rod and minimize the risk of the digital tube falling off the limiting strip when it moves. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the overall structure of an LED digital tube testing device according to an embodiment of this application.

[0028] Figure 2 This is a top view of an LED digital tube testing device according to an embodiment of this application.

[0029] Figure 3 It is along Figure 2 A schematic diagram of the cross-sectional structure of line AA in the middle.

[0030] Figure 4 This is a partial structural cross-sectional view of an LED digital tube testing device according to an embodiment of this application, used to show the probe.

[0031] Figure 5 It is along Figure 2 A schematic diagram of the cross-sectional structure of the BB line.

[0032] Figure 6 This is a partial structural schematic diagram of an LED digital tube testing device according to an embodiment of this application.

[0033] Explanation of reference numerals in the attached figures:

[0034] 100. Rack; 101. Display unit;

[0035] 200. Limiting strip; 201. Insertion slot; 202. First magnetic block; 203. Guide slot; 204. Limiting block;

[0036] 300. Probe; 301. Fixed section; 302. Telescopic section; 303. Elastic element;

[0037] 400. Drive component; 401. Moving block; 402. Cylinder;

[0038] 500. Testing room; 501. Entrance / exit; 502. Image acquisition components;

[0039] 600, guide rod; 601, elongated hole;

[0040] 700, Moving part; 701, Lead screw; 702, Guide rod; 703, Slider; 704, Servo motor; 705, Connecting rod; 706, Second magnetic block. Detailed Implementation

[0041] The present application will be further described in detail below with reference to all the accompanying drawings.

[0042] This application discloses an LED digital tube testing device. (Refer to...) Figure 1 , Figure 2 and Figure 3 The LED digital tube testing device includes a frame 100, with a testing chamber 500 on the top of the frame 100. The testing chamber 500 contains an image acquisition unit 502 and a probe 300. The probe 300 is used to power on the digital tube, and the image acquisition unit 502 is used to take pictures of the digital tube. This allows for obtaining an image of the digital tube when it is emitting light, which facilitates the quality testing of each LED in the digital tube and improves testing efficiency.

[0043] Reference Figure 1 , Figure 2 and Figure 3 The testing chamber 500 is connected to one end of the top of the frame 100. An inlet / outlet 501 is located on the side of the testing chamber 500 near the middle of the frame 100. An image acquisition device 502, which is a camera, is connected to the top of the testing chamber 500 and faces vertically towards the bottom of the testing chamber 500. A guide rod 600 is provided at the top of the frame 100. The guide rod 600 is horizontally positioned with its length aligned with the length of the frame 100. One end of the guide rod 600 is located at one end of the frame 100, and the other end passes through the inlet / outlet 501 and enters the testing chamber 500, located at the other end of the frame 100. The guide rod 600 has an elongated hole 601, the length of which is aligned with the length of the guide rod 600.

[0044] A limiting strip 200 is provided at the top of the guide rod 600, with its length direction aligned with that of the guide rod 600. Limiting blocks 204 are connected to both ends of the limiting strip 200 along its length. A guide groove 203 is formed at the bottom of the limiting strip 200, with its length direction aligned with that of the limiting strip 200 and extending through both ends of the limiting strip 200. The top of the guide rod 600 is inserted into the limiting strip 200 via the guide groove 203, and the limiting strip 200 slides along the length of the guide rod 600. After the digital tube is placed on top of the limiting strip 200, the pins on both sides of the digital tube are located on both sides of the limiting strip 200 along its width, with each LED of the digital tube facing upwards.

[0045] Reference Figure 3 , Figure 4 and Figure 5 There are two sets of probes 300, located on both sides of the guide rod 600 along its width direction, with several probes 300 in each set. A drive unit 400 is provided on both sides of the guide rod 600 along its width direction. The drive unit 400 includes a cylinder 402 and a moving block 401. The cylinder 402 is horizontally positioned with its piston rod perpendicular to the length direction of the guide rod 600. The piston rod of the cylinder 402 faces the guide rod 600 and is connected to the moving block 401. The length direction of the probes 300 is consistent with the length direction of the piston rod of the cylinder 402. Each set of probes 300 is evenly spaced along the length direction of the guide rod 600 on the side of the moving block 401 facing the guide rod 600. The probes 300 are used for electrical connection to a power source.

[0046] Reference Figure 4 , Figure 5 and Figure 6 The probe 300 includes a fixed section 301 and a telescopic section 302. The length directions of both the fixed section 301 and the telescopic section 302 are consistent with the length direction of the piston rod of the cylinder 402. One end of the fixed section 301 is connected to the moving block 401. An elastic element 303 is provided in the fixed section 301. The elastic element 303 is a spring. One end of the spring is connected to the fixed section 301. One end of the telescopic section 302 is inserted into the other end of the fixed section 301 and connected to the other end of the spring. The end of the telescopic section 302 away from the fixed section 301 is used to contact the probe 300, so that the digital tube can be energized.

[0047] Reference Figure 3 , Figure 5 and Figure 6The bottom of the limiting strip 200 has an insertion groove 201, in which a first magnetic block 202 is disposed. The frame 100 is provided with a moving component 700, which includes a lead screw 701, a guide rod 702, and a slider 703. The lead screw 701, guide rod 702, and slider 703 are all located below the guide rod 600. The length directions of the lead screw 701 and guide rod 702 are consistent with the length direction of the guide rod 600. The guide rod 702 is fixedly connected to the frame 100. The frame 100 is provided with a servo motor 704, the output shaft of which is connected to one end of the lead screw 701. The lead screw 701 is rotatably connected to the frame 100. One end of the slider 703 is threaded onto the lead screw 701, and the other end of the slider 703 is slidably sleeved onto the guide rod 702. A connecting rod 705 is connected to the top of the slider 703. The connecting rod 705 is vertically set, and a second magnetic block 706 is connected to the top of the connecting rod 705. The top of the connecting rod 705 passes through the elongated hole 601 and is inserted into the bottom of the limiting strip 200 through the insertion groove 201. The second magnetic block 706 is attracted to the first magnetic block 202.

[0048] A display unit 101 is connected to the top of the rack 100. The display unit 101 is a horizontally positioned display screen. An image acquisition unit 502 is electrically connected to a controller, and the display unit 101 is electrically connected to the controller, which is an S7-200 PLC. The image acquisition unit 502 is used to take pictures of the digital tube and output image information, while the controller is used to receive the image information and control the display unit 101 to display the picture on the digital tube.

[0049] The implementation principle of the LED digital tube testing device in this application embodiment is as follows: The operator places multiple digital tubes on the limiting strip 200, and then places the limiting strip 200 on top of the guide rod 600, so that one end of the connecting rod 705 is located in the insertion slot 201, and the top of the guide rod 600 is located in the guide groove 203. The servo motor 704 drives the lead screw 701 to rotate forward, and the slider 703 drives the limiting strip 200 to move on the guide rod 600 through the connecting rod 705, thereby conveying the digital tubes to the testing chamber 500. The cylinder 402 drives the moving block 401 to approach the digital tube until the probe 300 contacts the pin of the digital tube, the digital tube is powered on, and each LED of the digital tube emits light. The image acquisition unit 502 takes a picture of the digital tube, and the display unit 101 displays the picture of the digital tube emitting light. Therefore, the quality of each LED of the digital tube can be judged by the picture of the digital tube emitting light, which facilitates the detection of the quality of each LED of the digital tube and improves the detection efficiency. After each digital tube is tested, the servo motor 704 drives the lead screw 701 to reverse, and the limit bar 200 is output from the testing chamber 500.

[0050] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An LED digital tube testing device, characterized in that: The device includes a rack (100) with a limiting strip (200) for placing a digital tube. The limiting strip (200) has probes (300) for energizing the digital tube on both sides along its width. The probes (300) on both sides of the limiting strip (200) are connected to a driving unit (400). The driving unit (400) is used to drive the probes (300) to move so that the probes (300) are close to or away from the pins of the digital tube. An image acquisition unit (502) is provided above the limiting strip (200). The image acquisition unit (502) is electrically connected to a controller. The controller is electrically connected to a display unit (101). The image acquisition unit (502) is used to take pictures of the digital tube and output image information. The controller is used to receive the image information and control the display unit (101) to display the picture of the digital tube.

2. The LED digital tube testing device according to claim 1, characterized in that: The drive unit (400) includes a moving block (401) and a cylinder (402), the moving block (401) is connected to the piston rod end of the cylinder (402), and the probe (300) is connected to the moving block (401).

3. The LED digital tube testing device according to claim 2, characterized in that: The probe (300) includes a fixed section (301) and a telescopic section (302). The fixed section (301) is connected to the moving block (401). One end of the telescopic section (302) is located in the fixed section (301) and is slidably connected to the fixed section (301) along the length direction of the fixed section (301). An elastic element (303) is provided in the fixed section (301). One end of the telescopic section (302) located in the fixed section (301) is connected to the elastic element (303).

4. The LED digital tube testing device according to claim 1, characterized in that: The frame (100) is provided with a detection chamber (500), the image acquisition component (502) and the probe (300) are both located in the detection chamber (500), the detection chamber (500) has an inlet and outlet (501) on one side, the frame (100) is provided with a guide rod (600), one end of the guide rod (600) is located in the detection chamber (500), and the other end of the guide rod (600) passes through the inlet and outlet (501) and is located outside the detection chamber (500). The length direction of the limiting strip (200) is consistent with the length direction of the guide rod (600), and the limiting strip (200) is slidably connected to the guide rod (600) along the length direction of the guide rod (600) through a moving component (700).

5. The LED digital tube testing device according to claim 4, characterized in that: The guide rod (600) has an elongated hole (601) with the length direction of the elongated hole (601) being consistent with the length direction of the guide rod (600). The moving part (700) is located below the guide rod (600). The moving part (700) includes a lead screw (701), a guide rod (702), a slider (703), and a servo motor (704). The length directions of the lead screw (701) and the guide rod (702) are consistent with the length direction of the guide rod (600). The output shaft of the servo motor (704) is connected to one end of the lead screw (701). One end of the slider (703) is slidably sleeved on the guide rod (702), and the other end of the slider (703) is threaded onto the lead screw (701). A connecting rod (705) is connected to the top of the slider (703). One end of the connecting rod (705) passes through the elongated hole (601) and is connected to the limiting strip (200).

6. The LED digital tube testing device according to claim 5, characterized in that: The bottom of the limiting strip (200) is provided with a plug groove (201), a first magnetic block (202) is provided in the plug groove (201), and a second magnetic block (706) is provided at one end of the connecting rod (705). The connecting rod (705) is plugged into the bottom of the limiting strip (200) through the plug groove (201), and the first magnetic block (202) and the second magnetic block (706) are attracted to each other.

7. The LED digital tube testing device according to claim 4, characterized in that: The bottom of the limiting strip (200) is provided with a guide groove (203), the length direction of the guide groove (203) is consistent with the length direction of the limiting strip (200), and the top of the guide rod (600) is inserted into the bottom of the limiting strip (200) through the guide groove (203).

8. The LED digital tube testing device according to claim 1, characterized in that: Limiting blocks (204) are provided at both ends of the limiting strip (200).

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