A circuit board testing device to prevent NG (non-compliant) products from being missed.

Abstract

This utility model relates to a circuit board testing device to prevent NG (Not Good) products from being missed during discharge. It includes a testing unit and an NG placement box. The NG placement box is hollow and contains a sensing mechanism for detecting when NG products are placed inside. The testing unit includes a positioning fixture and a testing component located above the positioning fixture. The testing component includes a lifting drive, a test plate that is lifted and lowered by the lifting drive, and an electrical probe located at the bottom of the test plate. When the electrical probe detects an NG product, the test plate rises, and the lifting drive is temporarily locked until the sensing mechanism detects the addition of an NG product. This circuit board testing device has a simple structure and low cost. The sensing mechanism confirms that the operator has performed the NG product discharge operation. Only by confirming that the NG product is correctly placed in the NG placement box can it be ensured that the NG product does not flow into the PASS (Pass) tray, thus preventing NG products from being mistakenly discharged and avoiding customer complaints.

Description

Technical Field

[0001] This utility model relates to the field of electrical performance testing technology, and in particular to a circuit board testing device to prevent NG products from being missed. Background Technology

[0002] Modern circuit boards often integrate multiple layers of conductive lines, resulting in complex structures that are prone to short circuits and open circuits. Therefore, various tests are always required after manufacturing to prevent defective products from being shipped.

[0003] Chinese patent CN111359917A discloses a circuit board testing device that uses a turntable to deliver circuit boards to a first and second testing component for testing, and then uses pneumatic clamps to place the circuit boards into different storage boxes according to the test results. While this device has a high degree of automation, it requires a turntable and a relatively complex unloading component, resulting in a large footprint and numerous parts, making it unsuitable for simple testing and screening tasks. Fully automatic testing machines rely on robotic arms to pick up products; however, in case of abnormalities, this can lead to product spillage, dropping defective products among good ones, and posing a risk of loss.

[0004] Typically, FPC (Flexible Printed Circuit Board) / PCB (Printed Circuit Board) individual functional test fixtures can only determine whether a product's function is PASS or NG. During testing, personnel take the product from the left test area and place it in the middle test fixture for testing. If the product passes the test, it is placed in the good product packaging box on the right. When an NG product is encountered, personnel manually remove it from the test fixture slot and place it in the NG test area for re-evaluation. Since all NG products are manually removed from the test fixture by the test personnel, they may mistakenly put NG products into the good product area, causing functional defects to flow to the customer and resulting in serious customer complaints.

[0005] Therefore, a new detection circuit is needed to solve the above problems. Utility Model Content

[0006] The main purpose of this utility model is to provide a circuit board testing device that prevents NG products from being missed, ensuring that NG products do not flow into the PASS placement tray, avoiding NG products being mistakenly discharged, and preventing customer complaints.

[0007] This utility model achieves the above-mentioned objective through the following technical solution: a circuit board testing device to prevent NG products from being missed, comprising a testing device and an NG placement box. The NG placement box is hollow and has a sensing mechanism inside for sensing NG products being placed into the NG placement box. The testing device includes a positioning fixture and a testing component located above the positioning fixture. The testing component includes a lifting drive, a test pressure plate driven to rise by the lifting drive, and an electrical probe located at the bottom of the test pressure plate. When the electrical probe detects an NG product, the test pressure plate rises and the lifting drive is temporarily locked until the sensing mechanism detects that an NG product has been added.

[0008] Specifically, the NG placement box includes a box body with an upper opening and a cover that is fastened to the box body. The cover has a narrow slit channel for placing NG items, and the detection area of ​​the sensing mechanism intersects with the lower projection range of the narrow slit channel.

[0009] Furthermore, the sensing mechanism is a photoelectric sensor, the detection direction of the photoelectric sensor is horizontal, and the detection direction has an angle of 45° to 90° with the length direction of the narrow slit channel.

[0010] Furthermore, there are multiple photoelectric sensors, and the distance between the two photoelectric sensors that are furthest apart is 50 to 80% of the length of the narrow slit channel.

[0011] Specifically, it also includes a PASS placement tray, with the NG placement box and the PASS placement tray respectively disposed on both sides of the testing device.

[0012] Specifically, the testing device also includes a control box, the positioning fixture is located on the control box, the testing component also includes a fixed bracket disposed behind the positioning fixture, and the lifting drive component is disposed on the front side of the fixed bracket.

[0013] Furthermore, the front of the control box is equipped with an NG red light and a PASS green light.

[0014] Furthermore, a detection start switch for controlling the lifting drive component is provided on the side of the control box. When the test result is NG, the detection start switch will be temporarily locked until the sensing mechanism detects that material is being fed in.

[0015] Specifically, the test plate has two pressure blocks, and the electrical probe is located between the two pressure blocks.

[0016] The beneficial effects of this utility model's technical solution are:

[0017] This circuit board testing equipment has a simple structure and low cost. It can confirm that the operator has performed the NG product discharge operation through the sensing mechanism. Only by confirming that the NG product is correctly placed in the NG placement box can it be ensured that the NG product does not flow into the PASS placement tray. This can avoid the NG product being discharged by mistake and avoid customer complaints. Attached Figure Description

[0018] Figure 1 This is a perspective view of a circuit board testing device used in an embodiment to prevent the omission of defective products.

[0019] Figure 2 A 3D view of the NG placement box;

[0020] Figure 3 A 3D view of the NG placement box after removing the cover.

[0021] The numbers in the image represent:

[0022] 100-Circuit Board Testing Equipment

[0023] 1-Testing device, 11-Control box, 111-NG red light, 112-PASS green light, 113-Detection start switch, 12-Positioning fixture, 13-Testing components, 131-Fixed bracket, 132-Lifting drive component, 133-Testing plate, 134-Pressure block;

[0024] 2-NG placement box, 21-box body, 22-lid, 221-narrow slit channel, 23-photoelectric sensor;

[0025] 3-PASS placement tray;

[0026] 200 - Circuit board products, 201 - NG products, 202 - PASS products. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to specific embodiments.

[0028] Example:

[0029] like Figure 1 As shown, the present invention provides a circuit board testing device 100 for preventing NG products from being missed, comprising a testing device 1, an NG placement box 2, and a PASS placement tray 3, wherein the NG placement box 2 and the PASS placement tray 3 are respectively disposed on both sides of the testing device 1.

[0030] The testing device 1 is used to perform electrical tests on the circuit board product 200 to distinguish between NG products 201 and PASS products 202. After testing, NG products 201 are collected in the NG placement box 2, while PASS products 202 are placed in the PASS placement tray 3 for easy transfer.

[0031] like Figure 2 and Figure 3 As shown, the NG placement box 2 includes a box body 21 with an upper opening, a cover 22 that is fastened to the box body 21, and a sensing mechanism disposed inside the box body 21. The cover 22 is provided with a narrow slit channel 221 for NG items 201 to be placed in, and the detection area of ​​the sensing mechanism intersects with the lower projection range of the narrow slit channel 221.

[0032] The NG placement box 2 is hollow and contains an internal sensing mechanism to detect when NG product 201 is placed into it. The circuit board testing equipment 100 has a simple structure and low cost. The sensing mechanism confirms that the operator has performed the NG product 201 discharge operation. Only by confirming that NG product 201 is correctly placed into the NG placement box 2 can it be ensured that NG product 201 has not flowed into the PASS placement tray 3. This prevents NG product 201 from being mistakenly discharged, thus avoiding customer complaints.

[0033] like Figure 2 and Figure 3 As shown, the sensing mechanism consists of several photoelectric sensors 23. The detection direction of all photoelectric sensors 23 is horizontal, and the detection direction has an angle of 45° to 90° with the length direction of the narrow slit channel 221. The distance between the two photoelectric sensors 23 that are furthest apart is 50 to 80% of the length of the narrow slit channel 221.

[0034] The circuit board product 200 here is generally a board-shaped component. If its area is large, it can be easily detected by the photoelectric sensor 23 when placed vertically into the narrow slit channel 221, thus unlocking the test device 1. If the circuit board product 200 is relatively long and thin, there is a risk that it may fall into the narrow slit channel 221 at an angle and avoid the detection path of the photoelectric sensor 23, leading to misjudgment and failure to unlock the test device 1. Therefore, multiple photoelectric sensors 23 are required. In this way, even if one end of the circuit board product 200 touches the bottom of the box 21 first, the other end will still scan the detection range of a photoelectric sensor 23 during its fall. As long as any photoelectric sensor 23 detects the object passing by, it can send an unlocking signal to ensure the continuous normal operation of the test device 1.

[0035] like Figure 1As shown, the testing device 1 includes a control box 11, a positioning fixture 12 located on the control box 11, and a testing assembly 13 located above the positioning fixture 12. The testing assembly 13 includes a fixed bracket 131 located behind the positioning fixture 12, a lifting drive 132 located on the front side of the fixed bracket 131, a test plate 133 driven to rise and fall by the lifting drive 132, and two pressure blocks 134 located on the test plate 133. An electrical probe (not exposed) is located at the bottom of the test plate 133 between the two pressure blocks 134. When the electrical probe detects an NG item 201, the test plate 133 rises, and the lifting drive 132 is temporarily locked until the sensing mechanism inside the NG placement box 2 detects the insertion of an NG item 201.

[0036] The control box 11 houses the hardware required for parameter input, information output, and information feedback, and also serves as the base for the testing device 1. The typical electrical testing process for the circuit board product 200 involves placing it on the positioning fixture 12, followed by the lifting drive 132 driving the test plate 133 to press down on the circuit board product 200. The lifting drive 132 can be a cylinder or other linearly driven power component. If the circuit board product 200 is an FPC (flexible printed circuit board), two pressure blocks 134 will first press it firmly at both ends to ensure the test head does not puncture during testing. After testing, the test plate 133 is raised, exposing the circuit board product 200, allowing operators to manually unload or remove waste.

[0037] like Figure 1 As shown, the front of the control box 11 is equipped with an NG red light 111 and a PASS green light 112, and the side of the control box 11 is equipped with a detection start switch 113 that controls the lifting drive component 132 to be pushed out.

[0038] The test start switch 113 is used to start the test. After pressing the test start switch 113, the lifting drive component 132 will drive the test plate 133 to press down on the circuit board product 200, thereby completing the electrical test. After determining whether the circuit board product 200 is an NG product 201 or a PASS product 202, the NG red light 111 or the PASS green light 112 will light up accordingly, thus visually indicating the test result to the operator, allowing the operator to take appropriate action. When the test result is NG, the test start switch 113 will be temporarily locked until the sensing mechanism detects the input of material and will then be unlocked.

[0039] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. A circuit board testing device to prevent the omission of defective products, characterized in that: The device includes a testing apparatus and an NG placement box. The NG placement box is hollow and has an internal sensing mechanism for sensing when NG items are placed inside. The testing apparatus includes a positioning fixture and a testing component located above the positioning fixture. The testing component includes a lifting drive, a test plate that is driven to rise and fall by the lifting drive, and an electrical probe located at the bottom of the test plate. When the electrical probe detects an NG item, the test plate rises and the lifting drive is temporarily locked until the sensing mechanism detects that an NG item has been placed inside.

2. The circuit board testing equipment for preventing the omission of defective products according to claim 1, characterized in that: The NG placement box includes a box body with an opening at the top and a cover that is fastened to the box body. The cover has a narrow slit channel for placing NG items. The detection area of ​​the sensing mechanism intersects with the lower projection range of the narrow slit channel.

3. The circuit board testing equipment for preventing the omission of defective products according to claim 2, characterized in that: The sensing mechanism is a photoelectric sensor. The detection direction of the photoelectric sensor is horizontal, and the detection direction has an angle of 45° to 90° with the length direction of the narrow slit channel.

4. The circuit board testing equipment for preventing the omission of defective products according to claim 3, characterized in that: There are multiple photoelectric sensors, and the distance between the two photoelectric sensors that are furthest apart is 50 to 80% of the length of the narrow slit channel.

5. The circuit board testing equipment for preventing the omission of defective products according to claim 1, characterized in that: It also includes a PASS placement tray, with the NG placement box and the PASS placement tray respectively disposed on both sides of the testing device.

6. The circuit board testing equipment for preventing the omission of defective products according to claim 1, characterized in that: The testing device also includes a control box, the positioning fixture is located on the control box, the testing component also includes a fixed bracket disposed behind the positioning fixture, and the lifting drive component is disposed on the front side of the fixed bracket.

7. The circuit board testing equipment for preventing the omission of defective products according to claim 6, characterized in that: The front of the control box is equipped with an NG red light and a PASS green light.

8. The circuit board testing equipment for preventing the omission of defective products according to claim 6, characterized in that: The control box is equipped with a detection start switch on the side to control the lifting drive component to extend. When the test result is NG, the detection start switch will be temporarily locked until the sensing mechanism detects that material is being fed in.

9. The circuit board testing equipment for preventing the omission of defective products according to claim 1, characterized in that: The test plate has two pressure blocks, and the electrical probe is located between the two pressure blocks.

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