Detection device for diode

Abstract

The utility model relates to the field of diode detection, in particular to a diode detection device, which comprises a base, a support disc is fixed at the top of the base, a turntable is rotatably connected with the top of the support disc, a first stepping motor is fixed in the base, and an output shaft of the first stepping motor is fixedly connected with the turntable. A plurality of accommodating holes for placing diodes are formed in the rotating disc at equal angles, the bottoms of the accommodating holes are in contact with the supporting disc, two mounting holes are formed in the supporting disc, and electrode holders are slidably connected in the mounting holes. Automatic feeding and detection of the diodes are achieved, the detection efficiency is greatly improved, and complexity and errors of manual operation are reduced. The performance state of the diode can be accurately judged through close contact between the electrode holder and the pin of the diode and measurement of the universal meter on voltage or current, and the reliability of a detection result is ensured.

Description

Technical Field

[0001] The utility model relates to the field of diode detection, in particular to a diode detection device. Background Art

[0002] Most of the existing SMD diode tests are done manually by using a multimeter to measure the two poles of the diode. When the diode is in the forward conduction state, the current can flow through the diode, and the multimeter can detect the corresponding voltage or current value; when the diode is in the reverse cutoff state, the current cannot flow through the diode, and the voltage or current value detected by the multimeter will be very small or zero. However, the existing technology has a relatively low detection efficiency and is not suitable for large-scale diode quality testing.

[0003] Therefore, it is necessary to provide a diode detection device to solve the above technical problems. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a diode detection device.

[0005] The utility model provides a diode detection device, comprising a base, a support disk fixed on the top of the base, a turntable rotatably connected to the top of the support disk, a first stepper motor fixed inside the base, an output shaft of the first stepper motor fixedly connected to the turntable, a plurality of accommodating holes for placing diodes are opened at equal angles in the turntable, the bottom of the accommodating holes contacts the support disk, two mounting holes are provided in the support disk, electrode seats are slidably connected in the mounting holes, a limiting plate for limiting the diode in the accommodating holes is fixed on the support disk, a multimeter is fixed on one side of the limiting plate, an electrode switching assembly is installed at the bottom of the support disk, and the multimeter is electrically connected to the electrode seat through the electrode switching assembly.

[0006] Preferably, a mounting frame is fixed to the side wall of the support plate, and a material rack for accommodating diodes in a stacked manner is provided on the mounting frame.

[0007] Preferably, the material rack includes an annular bottom plate and L-shaped plates fixed to the four corners of the top of the annular bottom plate, and four L-shaped plates surround a diode stacking slot.

[0008] Preferably, the bottom of the limiting plate contacts the rotating disk, and when the diode to be detected is placed in the accommodating hole, the top of the diode to be detected is flush with the top of the rotating disk.

[0009] Preferably, the support plate is provided with a discharge notch for avoiding the accommodating hole.

[0010] Preferably, the width of the discharge notch is greater than the width of the accommodating hole.

[0011] Preferably, the electrode switching assembly includes a U-shaped frame fixed to the bottom of the supporting plate, a second stepper motor is fixed to the bottom of the U-shaped frame, a mounting plate is fixed to the output end of the second stepper motor, two terminals are fixed on the mounting plate, the terminals are electrically connected to the two poles of the multimeter through wires, a conductive fixing rod is fixed to the bottom of the electrode seat, a conductive sleeve is fixed to the end of the conductive fixing rod, a compression spring is installed on the outside of the conductive fixing rod between the conductive sleeve and the electrode seat, and the conductive sleeve cooperates with the terminals.

[0012] Preferably, the top of the terminal is flush with the inside of the U-shaped frame.

[0013] Preferably, the end of the conductive sleeve is hemispherical.

[0014] Preferably, a receiving hopper is provided directly below the discharge notch.

[0015] Preferably, an inclined portion and a flat portion are provided on the top of the electrode seat, and when the electrode seat is located in the accommodating hole, one end of the inclined portion is arranged in the mounting hole.

[0016] Preferably, a chamfer is provided at the entrance of the accommodating hole.

[0017] Compared with the related art, the utility model has the following beneficial effects:

[0018] Through the cooperation of the turntable and the stepper motor, automatic loading and detection of diodes are realized, which greatly improves the detection efficiency and reduces the tediousness and errors of manual operation.

[0019] Through the close contact between the electrode holder and the pin of the diode and the measurement of voltage or current by the multimeter, the performance status of the diode can be accurately judged to ensure the reliability of the test results.

[0020] The utility model adopts modular design, the components are closely matched, the structure is compact, and it is convenient to install and maintain. At the same time, through reasonable layout and optimized design, the volume and weight of the device are reduced, and it is easy to carry and move.

[0021] The operation of the utility model device is simple and intuitive. It only needs to put the diode into the material rack and start the device to start the detection. At the same time, the detection result can be directly read by a multimeter without complicated subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a schematic diagram of the relative position of the discharge notch of the utility model;

[0024] Figure 3This is a schematic diagram of the support plate structure of the utility model;

[0025] Figure 4 It is a schematic diagram of the structure of the electrode switching assembly of the utility model.

[0026] Numbers in the figure: 1. Detection device for diode; 2. Base; 3. Support plate; 4. Turntable; 5. First stepper motor; 6. Receiving hole; 7. Mounting hole; 8. Electrode holder; 9. Limit plate; 10. Multimeter; 11. Electrode switching assembly; 12. Mounting frame; 13. Material rack; 14. Annular bottom plate; 15. L-shaped plate; 16. Diode stacking groove; 17. Unloading notch; 18. U-shaped frame; 19. Second stepper motor; 20. Mounting plate; 21. Terminal; 22. Conductive fixing rod; 23. Conductive sliding sleeve; 24. Compression spring; 25. Material collecting hopper; 26. Inclined portion; 27. Flattening portion; 28. Chamfer. DETAILED DESCRIPTION

[0027] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0028] Please refer to Figures 1 to 4 A diode detection device 1 comprises a base 2, a support disk 3 is fixed on the top of the base 2, a turntable 4 is rotatably connected to the top of the support disk 3, a first stepper motor 5 is fixed inside the base 2, an output shaft of the first stepper motor 5 is fixedly connected to the turntable 4, a plurality of accommodating holes 6 for placing diodes are provided at equal angles in the turntable 4, the bottom of the accommodating holes 6 is in contact with the support disk 3, two mounting holes 7 are provided in the support disk 3, an electrode holder 8 is slidably connected in each of the mounting holes 7, a limiting plate 9 for limiting the diode in the accommodating hole 6 is fixed on the support disk 3, a multimeter 10 is fixed on one side of the limiting plate 9, an electrode switching assembly 11 is installed at the bottom of the support disk 3, and the multimeter 10 is electrically connected to the electrode holder 8 through the electrode switching assembly 11.

[0029] A mounting frame 12 is fixed to the side wall of the support plate 3 , and a material rack 13 for stacking diodes is provided on the mounting frame 12 .

[0030] The material rack 13 includes an annular bottom plate 14 and L-shaped plates 15 fixed at the four corners of the top of the annular bottom plate 14. The four L-shaped plates 15 surround a diode stacking slot 16. When the detection device starts working, the diodes slide down from the diode stacking slot under the action of gravity and enter the receiving hole 6 of the turntable through the mounting frame 12. Since the turntable 4 is rotating, when the receiving hole 6 rotates to the bottom of the material rack 13, it can automatically receive the diodes to realize automatic loading.

[0031] The bottom of the limiting plate 9 is in contact with the turntable 4. When the diode to be tested is placed in the receiving hole 6, the top of the diode to be tested is flush with the top of the turntable 4. The limiting plate 9 ensures that the diode can be stably placed in the receiving hole 6, so that the electrode seat 8 is in close contact with the pin of the diode.

[0032] The support plate 3 is provided with a discharge notch 17 for avoiding the accommodating hole 6. A receiving hopper 25 is provided directly below the discharge notch 17, and the qualified products after inspection fall along the discharge notch 17 and are collected in the receiving hopper 25.

[0033] The width of the discharge notch 17 is greater than the width of the accommodating hole 6 , so that the diode can smoothly fall into the receiving hopper 25 .

[0034] The electrode switching assembly 11 includes a U-shaped frame 18 fixed to the bottom of the support plate 3, a second stepper motor 19 is fixed to the bottom of the U-shaped frame 18, a mounting plate 20 is fixed to the output end of the second stepper motor 19, two terminals 21 are fixed on the mounting plate 20, and the terminals 21 are electrically connected to the two poles of the multimeter 10 through wires, a conductive fixing rod 22 is fixed to the bottom of the electrode seat 8, a conductive sleeve 23 is fixed to the end of the conductive fixing rod 22, a compression spring 24 is installed on the outer side of the conductive fixing rod 22 between the conductive sleeve 23 and the electrode seat 8, and the conductive sleeve 23 cooperates with the terminal 21.

[0035] The top of the terminal 21 is flush with the inside of the U-shaped frame 18. The end of the conductive sleeve 23 is hemispherical, which helps to reduce resistance, so that the conductive sleeve 23 moves smoothly during the switching process, and improves the accuracy and stability of the switching.

[0036] The top of the electrode holder 8 is provided with an inclined portion 26 and a flat portion 27 . When the electrode holder 8 is located in the accommodating hole 6 , one end of the inclined portion 26 is disposed in the mounting hole 7 .

[0037] The entrance of the receiving hole 6 is provided with a chamfer 28 so that the diode can smoothly fall into the receiving hole 6 under its own gravity.

[0038] Working principle:

[0039] When the detection device starts working, the diode slides down from the diode stacking slot under the action of gravity and enters the receiving hole 6 of the turntable through the mounting frame 12. Since the turntable 4 is rotating, when the receiving hole 6 is transferred to the bottom of the material rack 13, the diode can be automatically received to realize automatic loading.

[0040] Due to the arrangement of the conductive sliding sleeve 23, the conductive fixing rod 22, the compression spring 24 and the electrode seat 8, when there is no diode in the accommodating hole 6 and the electrode seat 8 is facing the accommodating hole 6, since the top is not subjected to force, at this time, the flat portion 27 of the electrode seat 8 is entirely located in the accommodating hole 6 and a portion of the inclined portion 26 is located in the accommodating hole 6. As the turntable 4 rotates, when the bottom edge of the accommodating hole 6 contacts the inclined portion 26, the turntable 4 squeezes the inclined portion 26 to make the electrode seat 8 slide along the mounting hole 7, and the compression spring 24 is compressed. When the turntable 4 completely covers the electrode seat 8, the electrode seat 8 is completely located in the mounting hole 7.

[0041] The detection device realizes automatic detection of multiple diodes by setting a turntable 4 and a receiving hole 6. The turntable 4 is driven by a first stepper motor 5, so that the diodes enter the detection position in turn. At the detection position, the electrode holder 8 contacts the two ends of the diode to form a circuit connection. Through the electrode switching component 11, the multimeter 10 can measure the voltage or current at both ends of the diode to judge its performance. When the diode is in a forward conduction state, the current can flow through the diode, and the multimeter 10 can detect the corresponding voltage or current value; when the diode is in a reverse cut-off state, the current cannot flow through the diode, and the voltage or current value detected by the multimeter will be very small or zero. Unqualified diode products detected can be directly discarded.

[0042] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A diode detection device, characterized in that: The invention comprises a base (2), a support plate (3) being fixed on the top of the base (2), a turntable (4) being rotatably connected to the top of the support plate (3), a first stepper motor (5) being fixed inside the base (2), an output shaft of the first stepper motor (5) being fixedly connected to the turntable (4), a plurality of accommodating holes (6) for accommodating diodes being provided at equal angles in the turntable (4), the bottom of the accommodating holes (6) being in contact with the support plate (3), two mounting holes (7) being provided in the support plate (3), an electrode seat (8) being slidably connected in each of the mounting holes (7), a limiting plate (9) for limiting the diode in the accommodating holes (6) being fixed on the support plate (3), a multimeter (10) being fixed on one side of the limiting plate (9), an electrode switching assembly (11) being installed at the bottom of the support plate (3), the multimeter (10) being electrically connected to the electrode seat (8) via the electrode switching assembly (11).

2. A diode detection device according to claim 1, characterized in that: A mounting frame (12) is fixed to the side wall of the support plate (3), and a material rack (13) for stacking diodes is provided on the mounting frame (12).

3. A diode detection device according to claim 2, characterized in that: The material rack (13) comprises an annular bottom plate (14) and L-shaped plates (15) fixed to the four corners of the top of the annular bottom plate (14), and four L-shaped plates (15) surround a diode stacking slot (16).

4. A diode detection device according to claim 3, characterized in that: The bottom of the limiting plate (9) contacts the rotating disk (4), and when the diode to be detected is placed in the receiving hole (6), the top of the diode to be detected is flush with the top of the rotating disk (4).

5. A diode detection device according to claim 1, characterized in that: The support plate (3) is provided with a discharge notch (17) for avoiding the accommodating hole (6).

6. A diode detection device according to claim 5, characterized in that: The width of the discharge notch (17) is greater than the width of the accommodating hole (6).

7. A diode detection device according to claim 1, characterized in that: The electrode switching assembly (11) comprises a U-shaped frame (18) fixed to the bottom of the support plate (3), a second stepper motor (19) being fixed to the bottom of the U-shaped frame (18), a mounting plate (20) being fixed to the output end of the second stepper motor (19), two terminals (21) being fixed to the mounting plate (20), the terminals (21) being electrically connected to the two poles of the multimeter (10) through wires, a conductive fixing rod (22) being fixed to the bottom of the electrode seat (8), a conductive sleeve (23) being fixed to the end of the conductive fixing rod (22), a compression spring (24) being installed on the outer side of the conductive fixing rod (22) and located between the conductive sleeve (23) and the electrode seat (8), the conductive sleeve (23) being matched with the terminals (21).

8. A diode detection device according to claim 7, characterized in that: The top of the terminal post (21) is flush with the inside of the U-shaped frame (18).

9. A diode detection device according to claim 7, characterized in that: The end of the conductive sliding sleeve (23) is hemispherical.

10. The diode detection device according to claim 5, characterized in that: A material receiving hopper (25) is provided directly below the discharge notch (17).

11. A diode detection device according to claim 1, characterized in that: The top of the electrode seat (8) is provided with an inclined portion (26) and a flat portion (27); when the electrode seat (8) is located in the accommodating hole (6), one end of the inclined portion (26) is arranged in the mounting hole (7).

12. The diode detection device according to claim 1, characterized in that: A chamfer (28) is provided at the entrance of the receiving hole (6).

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