PCB (Printed Circuit Board) detection device

Abstract

The invention relates to the technical field of detection equipment, in particular to a PCB detection device. The PCB detection device comprises a magnetic ring, a driving mechanism and a plurality of PCB supports. The magnetic ring can rotate to generate a magnetic field; the inner walls of the plurality of PCB supports define an accommodating cavity, the accommodating cavity is cylindrical, the inner wall of each PCB support is provided with a mounting part along the same plane, the mounting part is used for fixing a to-be-detected PCB, and the mounting part is arranged at the top of the magnetic ring; the driving mechanism is connected with the plurality of PCB supports so as to drive the plurality of PCB supports to expand or contract at the same time. The PCB detection device solves the problems that a traditional Hall PCB detection device is poor in universality, the Hall PCB is not fixed stably, and the detection data precision is low.

Description

Technical Field

[0001] The present application relates to the technical field of detection equipment, and in particular to a PCB board detection device. Background Art

[0002] When traditional Hall PCB board inspection equipment inspects the quality of Hall PCB boards, the Hall PCB board is generally placed above the magnetic ring through a fixed frame. During the inspection, the driving mechanism drives the magnetic ring to rotate, and the Hall PCB board senses the rotating magnetic field of the magnetic ring to generate a Hall signal. The Hall signal is detected by a special test instrument, and then the Hall angle is detected to detect the quality of the Hall PCB board.

[0003] However, due to the inconsistent sizes of the Hall PCB boards to be tested, traditional Hall PCB board detection equipment has poor versatility and cannot adapt to Hall PCB boards of various inconsistent sizes. Moreover, when the Hall PCB board is fixed for detection, the Hall PCB board is unstable and has poor coaxiality, resulting in low detection data accuracy. Summary of the invention

[0004] The purpose of the present application is to provide a PCB board detection device, thereby solving the problems of poor versatility of traditional Hall PCB board detection equipment, unstable fixation of the Hall PCB board, and low detection data accuracy.

[0005] According to the present application, a PCB board detection device is provided, which includes a magnetic ring, a driving mechanism and a plurality of PCB board brackets; the magnetic ring can rotate to generate a magnetic field; the inner walls of the plurality of PCB board brackets are arranged to form a receiving cavity, the receiving cavity is cylindrical, and the inner wall of each PCB board bracket is provided with a mounting portion along the same plane, the mounting portion is used to fix the PCB board to be detected, and the mounting portion is arranged on the top of the magnetic ring; the driving mechanism is connected to the plurality of PCB board brackets to drive the plurality of PCB board brackets to expand or contract simultaneously.

[0006] In any of the above technical schemes, further, the driving mechanism is a multi-jaw chuck; the multi-jaw chuck includes a step portion, a turntable portion, multiple fixed portions and multiple claws; the multiple fixed portions are arranged at the top of the step portion, and a slideway is arranged between any two adjacent ones of the multiple fixed portions, the multiple claws correspond one-to-one to the multiple slideways, and the claws are slidably connected to the corresponding slideways; the turntable portion is sleeved on the step portion, and the turntable portion is arranged at the bottom of the fixed portion, and the turntable portion can rotate to drive the multiple claws to expand or contract simultaneously along the slideway; the multiple claws correspond one-to-one to the multiple PCB board brackets, and the claws are fixedly connected to the corresponding PCB board brackets.

[0007] In any of the above technical solutions, further, the claw includes a supporting portion and a connecting portion connected to each other; the PCB board bracket includes a main body and a flange portion arranged along the outer wall of the main body; the inner walls of the multiple main bodies are arranged to form the accommodating cavity, and the inner wall of each main body is provided with the mounting portion along the same plane; the top end of the supporting portion is lower than the top end of the connecting portion, so as to form a step surface for supporting the flange portion with the connecting portion, and the connecting portion is fixedly connected to the flange portion.

[0008] In any of the above technical solutions, further, the mounting portion is a mounting groove formed on the inner wall of the main body.

[0009] In any of the above technical solutions, further, the PCB board detection device also includes a motor and a magnetic ring bracket; the magnetic ring is arranged at the top of the magnetic ring bracket; the motor is arranged at the bottom of the magnetic ring bracket, and the output shaft of the motor is connected to the magnetic ring bracket to drive the magnetic ring bracket and the magnetic ring to rotate; the magnetic ring bracket is cylindrical, and the magnetic ring bracket passes through the middle of the multi-jaw chuck to the accommodating cavity.

[0010] In any of the above technical solutions, further, the PCB board detection device also includes a detection platform; the multi-claw chuck is fixed on the top of the detection platform, and the motor is fixed on the bottom of the detection platform; a through hole is provided in the middle of the detection platform, and the output shaft of the motor passes through the through hole and is fixedly connected to the magnetic ring bracket.

[0011] In any of the above technical solutions, further, the bottom of the magnetic ring bracket is sleeved on the output shaft of the motor, and the magnetic ring bracket and the output shaft of the motor are fixedly connected via a connecting piece.

[0012] In any of the above technical solutions, further, the detection platform is fixedly connected to the multi-jaw chuck via a connecting piece; a first protrusion is provided on the top of the detection platform, and a first recess radially matching with the first protrusion is provided on the bottom of the multi-jaw chuck.

[0013] In any of the above technical solutions, further, the detection platform is fixedly connected to the motor via a connecting piece; a second protrusion is provided on the top of the motor, and a second recess radially matching with the second protrusion is provided on the bottom of the detection platform.

[0014] In any of the above technical solutions, further, the PCB board detection device also includes an operating handle; the operating handle is fixedly connected to the turntable part to drive the turntable part to rotate.

[0015] The PCB board detection device of the present application includes a magnetic ring, a driving mechanism and a plurality of PCB board brackets. The magnetic ring can rotate to generate a magnetic field; the inner walls of the plurality of PCB board brackets are arranged to form a receiving cavity, the receiving cavity is cylindrical, and the inner wall of each PCB board bracket is provided with a mounting portion along the same plane, the mounting portion is used to fix the PCB board to be detected, and the mounting portion is arranged on the top of the magnetic ring; the driving mechanism is connected to the plurality of PCB board brackets to drive the plurality of PCB board brackets to expand or contract simultaneously.

[0016] According to the above technical features, the beneficial effects of this application are:

[0017] When the PCB board detection device of the present application is used, a plurality of PCB board brackets are driven to expand simultaneously by a driving mechanism, and then the diameter of the accommodating cavity surrounded by the plurality of PCB board brackets is adjusted. When the diameter of the accommodating cavity is adjusted to an appropriate size (i.e., the inner diameter of the plurality of PCB board brackets), the PCB board to be detected is fixed to the mounting portion of the plurality of PCB board brackets. After the fixing is completed, the plurality of PCB board brackets are driven to shrink simultaneously by the driving mechanism, and the PCB board to be detected is clamped. Finally, during the specific detection, the magnetic ring rotates, and the PCB board to be detected (taking the Hall PCB board as an example) senses the rotating magnetic field of the magnetic ring, and generates a Hall signal. The Hall signal is detected by a special test instrument, and then the Hall angle is detected, and the quality of the Hall PCB board is detected.

[0018] In summary, the multiple PCB board brackets of the present application are expanded or contracted at the same time to adjust the diameter of the accommodating cavity surrounded by the multiple PCB board brackets (i.e., the inner diameter of the multiple PCB board brackets), thereby adapting to Hall PCB boards of various inconsistent sizes. Compared with the prior art, it has strong versatility, and the multiple PCB board brackets can be contracted at the same time during detection to clamp the PCB board to be detected, which also solves the problems of unstable fixation of the Hall PCB board, poor coaxiality, and low detection data accuracy in the prior art.

[0019] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 A schematic diagram showing the overall structure of a PCB board detection device according to an embodiment of the present application;

[0022] Figure 2 Show Figure 1 Schematic diagram of some structures;

[0023] Figure 3 Show Figure 2 A structural diagram from another perspective;

[0024] Figure 4 Show Figure 1 Schematic diagram of the explosion structure;

[0025] Figure 5 A schematic diagram showing the exploded structure of a four-jaw chuck according to an embodiment of the present application;

[0026] Figure 6 A schematic diagram showing the assembly structure of a motor according to an embodiment of the present application is shown;

[0027] Figure 7 A schematic diagram of the assembly structure of a PCB board detection device according to an embodiment of the present application is shown.

[0028] Icons: 100-magnetic ring; 200-four-jaw chuck; 210-step part; 220-turntable part; 230-fixing part; 240-claw; 241-support part; 242-connecting part; 250-slide; 300-PCB board bracket; 310-main body; 311-installation slot; 320-flange; 400-motor; 410-output shaft; 420-second protrusion; 500-operating handle; 610-detection platform; 611-first protrusion; 620-column; 630-base; 700-Hall PCB board; 800-magnetic ring bracket; 810-placement slot; 901-first screw; 902-second screw; 903-third screw; 904-fourth screw; 905-fifth screw. DETAILED DESCRIPTION

[0029] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be apparent. For example, the order of operations described herein is merely an example, and is not limited to the order set forth herein, but in addition to the operations that must occur in a particular order, changes that will be apparent after understanding the disclosure of the present application may be made. In addition, in order to improve clarity and brevity, descriptions of features known in the art may be omitted.

[0030] The features described herein may be implemented in different forms and should not be interpreted as being limited to the examples described herein. Rather, the examples described herein have been provided only to illustrate some of the many possible ways of implementing the methods, devices and / or systems described herein that will be apparent after understanding the disclosure of the present application.

[0031] Throughout the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, “bound to”, “over”, or “covering” another element, it may be directly “on”, “connected to”, “bound to”, “over”, or “covering” another element, or one or more other elements may be present between them. In contrast, when an element is described as being “directly on”, “directly connected to”, “directly bound to”, “directly over”, or “directly covering” another element, there may be no other elements present between them.

[0032] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more items.

[0033] Although terms such as "first," "second," and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions are not limited by these terms. Rather, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, component, region, layer, or portion referred to may also be referred to as the second member, component, region, layer, or portion.

[0034] For ease of description, spatial relational terms such as "above", "upper", "below", and "lower" may be used herein to describe the relationship of one element to another element as shown in the accompanying drawings. Such spatial relational terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the accompanying drawings. For example, if the device in the accompanying drawings is turned over, an element described as being "above" or "upper" relative to another element will subsequently be "below" or "lower" relative to the other element. Therefore, the term "above" includes both "above" and "below" orientations depending on the spatial orientation of the device. The device may also be positioned in other ways (e.g., rotated 90 degrees or in other orientations), and the spatial relational terms used herein will be interpreted accordingly.

[0035] The terms used herein are only used to describe various examples and are not used to limit the present disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "include", "comprise" and "have" list the stated features, quantities, operations, components, elements and / or their combinations that exist, but do not exclude the existence or addition of one or more other features, quantities, operations, components, elements and / or their combinations.

[0036] Variations in the shapes shown in the drawings may occur due to manufacturing techniques and / or tolerances. Therefore, the examples described herein are not limited to the specific shapes shown in the drawings but include variations in shapes that occur during manufacturing.

[0037] The features of the examples described herein may be combined in various ways that will be apparent after understanding the disclosure of the present application. In addition, although the examples described herein have various configurations, other configurations are possible as will be apparent after understanding the disclosure of the present application.

[0038] Before this application was filed, conventional Hall PCB board detection equipment had poor versatility and could not adapt to Hall PCB boards of various inconsistent sizes. Moreover, when the Hall PCB board was fixed for detection, the Hall PCB board was unstable, had poor coaxiality, and had low detection data accuracy.

[0039] In view of this, the present application provides a PCB board detection device, thereby solving the problems of poor versatility of traditional Hall PCB board detection equipment, unstable fixation of the Hall PCB board, and low detection data accuracy. The following will take the PCB board to be detected as a Hall PCB board as an example to describe the PCB board detection device described in some embodiments of the present application.

[0040] like Figure 1 and Figure 2 As shown, the PCB board detection device of the present application includes a magnetic ring 100, a driving mechanism and a plurality of PCB board brackets 300. Among them. The magnetic ring 100 can rotate to generate a magnetic field; the inner walls of the plurality of PCB board brackets 300 are surrounded to form a receiving cavity, and the receiving cavity is cylindrical, and the inner wall of each PCB board bracket 300 is provided with a mounting portion along the same plane, and the mounting portion is used to fix the Hall PCB board 700 to be detected, and the mounting portion is arranged on the top of the magnetic ring 100; the driving mechanism is connected to the plurality of PCB board brackets 300 to drive the plurality of PCB board brackets 300 to expand or contract simultaneously.

[0041] When the PCB board detection device of the present application is used, the driving mechanism drives multiple PCB board brackets 300 to be simultaneously expanded, and then the diameter of the accommodating cavity surrounded by the multiple PCB board brackets 300 is adjusted. When the diameter of the accommodating cavity is adjusted to an appropriate size (i.e., the inner diameter of the multiple PCB board brackets 300), the Hall PCB board 700 to be detected is fixed to the mounting portion of the multiple PCB board brackets 300. After the fixing is completed, the driving mechanism drives the multiple PCB board brackets 300 to be simultaneously contracted, and the Hall PCB board 700 to be detected is clamped. Finally, during the specific detection, the magnetic ring 100 rotates, and the Hall PCB board 700 to be detected senses the rotating magnetic field of the magnetic ring 100, generating a Hall signal, which is detected by a special test instrument, and then the Hall angle is detected, and the quality of the Hall PCB board 700 is detected.

[0042] In summary, the multiple PCB board brackets 300 of the present application are expanded or contracted at the same time to adjust the diameter of the accommodating cavity surrounded by the multiple PCB board brackets 300 (that is, the inner diameter of the multiple PCB board brackets 300), so as to adapt to Hall PCB boards 700 of various inconsistent sizes. Compared with the prior art, it has strong versatility, and the multiple PCB board brackets 300 can be contracted at the same time during detection to clamp the Hall PCB board 700 to be detected, which also solves the problems of unstable fixation of the Hall PCB board, poor coaxiality, and low detection data accuracy in the prior art.

[0043] See below for Figures 1 to 7 The specific structures and assembly positions of the driving mechanism, the PCB bracket 300 and the magnetic ring 100 are described in detail.

[0044] In the embodiment of the present application, the specific form of the driving mechanism is not particularly limited. The driving mechanism is, for example, an electric driving method or a pneumatic driving method, as long as it can drive multiple PCB board brackets 300 to expand or contract simultaneously.

[0045] In the embodiment of the present application, preferably, the driving mechanism may be a multi-jaw chuck. Figure 2 and Figure 3 As shown, the following description takes a four-jaw chuck as an example of a driving mechanism.

[0046] like Figure 2 and Figure 3 As shown, the four-jaw chuck 200 includes a step portion 210, a rotating disk portion 220, four fixing portions 230 and four clamping jaws 240, wherein the four fixing portions 230 are arranged on the top of the step portion 210, and a slideway 250 is arranged between any two adjacent ones of the four fixing portions 230 (see Figure 5), four claws 240 correspond to four slideways 250 one by one, and the four claws 240 are slidably connected to the corresponding slideways 250; the turntable part 220 is sleeved on the step part 210, and the turntable part 220 is set at the bottom of the fixing part 230, and the turntable part 220 can rotate to drive the four claws 240 to expand or contract simultaneously along the slideways 250. Among them, the four claws 240 correspond to four PCB board brackets 300 one by one, and the claws 240 are fixedly connected to the corresponding PCB board brackets 300. It should be noted here that the four-claw chuck 200 described above is a prior art, and the specific structure and method of the turntable driving multiple claws 240 to expand or contract are not described in detail here.

[0047] In the embodiment of the present application, the four claws 240 and the four PCB brackets 300 can be fixed by welding. Figure 2 As shown, the claw 240 includes a supporting portion 241 and a connecting portion 242 connected to each other; the PCB board bracket 300 includes a main body 310 and a flange portion 320 arranged along the outer wall of the main body 310. Among them, the inner walls of the four main bodies 310 are arranged to form a receiving cavity, and the inner wall of each main body 310 is provided with a mounting portion along the same plane (the specific form of the mounting portion will be described below). The top of the supporting portion 241 is lower than the top of the connecting portion 242, so as to form a step surface for supporting the flange portion 320 with the connecting portion 242, and the connecting portion 242 is welded to the outer edge of the flange portion 320. In this way, the original structure of the claw 240 is utilized to install and weld the flange portion 320 and the claw 240 in a good match, which is not only fixed and stable, but also convenient and stable for the four claws 240 to push and pull the PCB board bracket 300, and the structure is small in volume, saving space.

[0048] In the embodiments of the present application, Figure 5 As shown, the mounting portion may be a mounting groove 311 formed on the inner wall of the main body 310. The step surface formed by the mounting groove 311 can be used to mount a circular Hall PCB 700. When multiple PCB brackets 300 are simultaneously expanded or contracted, the inner diameters surrounded by the four mounting grooves 311 are adjusted to accommodate Hall PCBs 700 of different sizes.

[0049] Further, in the embodiments of the present application, Figure 4 and Figure 7 As shown, the PCB board detection device also includes a motor 400 and a magnetic ring bracket 800. The magnetic ring 100 is arranged on the top of the magnetic ring bracket 800, the motor 400 is arranged on the bottom of the magnetic ring bracket 800, and the output shaft 410 of the motor 400 is connected to the magnetic ring bracket 800 to drive the magnetic ring bracket 800 and the magnetic ring 100 to rotate.

[0050] Furthermore, in the embodiments of the present application, in order to facilitate installation and ensure the stability of the overall structure. Figure 4 and Figure 7 As shown, the PCB board detection device of the present application further includes a detection platform 610. Among them, the four-jaw chuck 200 is fixed on the top of the detection platform 610, and the motor 400 is fixed on the bottom of the detection platform 610; a through hole is provided in the middle of the detection platform 610, and the output shaft 410 of the motor 400 passes through the through hole and is fixedly connected to the magnetic ring bracket 800.

[0051] Preferably, if Figure 4 As shown, the magnetic ring bracket 800 is cylindrical, and the magnetic ring bracket 800 passes through the middle of the four-jaw chuck 200 to the accommodating cavity. Preferably, a cylindrical placement groove 810 is also provided on the top of the magnetic ring bracket 800 to facilitate the installation and fixation of the magnetic ring 100.

[0052] In the embodiments of the present application, Figure 4 and Figure 7 As shown, the bottom of the magnetic ring bracket 800 is sleeved on the output shaft 410 of the motor 400 to achieve radial positioning (such as transition connection). On this basis, the magnetic ring bracket 800 and the output shaft 410 of the motor 400 are fixedly connected by a first screw 901. The screw fixing method is not only stable, but also convenient for disassembly of the motor 400 and the magnetic ring bracket 800.

[0053] In the embodiments of the present application, Figure 4 and Figure 7 As shown, the top of the detection platform 610 is provided with a first protrusion 611, and the bottom of the four-jaw chuck 200 is provided with a first recessed portion that radially matches the first protrusion 611. In other words, the first protrusion 611 (outer stop) of the detection platform 610 and the first recessed portion (inner stop, not shown in the figure) of the four-jaw chuck 200 are radially positioned. In addition, the detection platform 610 and the four-jaw chuck 200 are fixedly connected by a third screw 903. The screw fixing method is not only stable, but also convenient for disassembly of the detection platform 610 and the four-jaw chuck 200.

[0054] In the embodiments of the present application, Figure 6 and Figure 7 As shown, a second protrusion 420 is disposed on the top of the motor 400 , and a second recess radially matched with the second protrusion 420 is disposed on the bottom of the detection platform 610 .

[0055] That is, the second concave portion (inner stopper, not shown) of the detection platform 610 and the second protruding portion 420 (outer stopper) of the motor 400 are radially positioned. In addition, the motor 400 and the detection platform 610 are fixedly connected by the second screw 902. The screw fixing method is not only stable, but also convenient for disassembly of the motor 400 and the detection platform 610.

[0056] Furthermore, in the embodiment of the present application, in order to facilitate installation and ensure the stability of the overall structure, the PCB board detection device of the present application further includes a base 630 and four columns 620. The motor 400 is disposed on the base 630, and the four columns 620 are fixed between the detection platform 610 and the base 630. Specifically, Figure 7 As shown, the top ends of the four columns 620 are locked and fixed on the detection platform 610 by fourth screws 904 , and the bottom ends of the four columns 620 are locked and fixed on the base 630 by fifth screws 905 .

[0057] It is also worth mentioning that Figure 3 As shown, the PCB board detection device of the present application further includes an operating handle 500. The operating handle 500 is fixedly connected to the outer edge of the turntable portion 220 to drive the turntable portion 220 to rotate.

[0058] Here’s how it works:

[0059] The multi-petal PCB bracket 300 is simultaneously unfolded by rotating the operating handle 500, the diameter of the PCB bracket 300 is adjusted to an appropriate size, and the Hall PCB board 700 to be tested is fixed to the mounting groove 311 of the multiple PCB brackets 300. After the fixing is completed, the multi-petal PCB bracket 300 is simultaneously retracted by rotating the operating handle 500 in the opposite direction, and the Hall PCB board 700 to be tested is clamped. Finally, during the specific test, the motor 400 is started to drive the magnetic ring bracket 800 and the magnetic ring 100 to rotate, and the Hall PCB board 700 to be tested senses the rotating magnetic field of the magnetic ring 100 and generates a Hall signal. The Hall signal is tested by a special testing instrument, and then the Hall angle is detected, and the quality of the Hall PCB board 700 is detected. After the test is completed, the operating handle 500 is rotated to loosen and remove the Hall PCB board 700.

[0060] In summary, the multiple PCB board brackets of the present application are expanded or contracted at the same time to adjust the diameter of the accommodating cavity surrounded by the multiple PCB board brackets (i.e., the inner diameter of the multiple PCB board brackets), thereby adapting to various Hall PCB boards of inconsistent sizes. Compared with the prior art, it has strong versatility, and the multiple PCB board brackets can be contracted at the same time during detection to clamp the Hall PCB board to be detected, which also solves the problems of unstable fixation of the Hall PCB board, poor coaxiality, and low detection data accuracy in the prior art.

[0061] In addition, in the PCB board detection device of the present application, the Hall PCB board is easy to assemble and disassemble, and the detection is convenient and fast, which improves the detection efficiency and the detection accuracy.

[0062] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that any technician familiar with this technical field can still modify the technical solutions recorded in the aforementioned embodiments within the technical scope disclosed in the present application, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be covered by the protection scope of the present application.

Claims

1. A PCB board detection device, characterized in that: The PCB board detection device comprises a magnetic ring, a driving mechanism and a plurality of PCB board brackets; The magnetic ring is capable of rotating to generate a magnetic field; The inner walls of the plurality of PCB board brackets are arranged to form a receiving cavity, the receiving cavity is cylindrical, and the inner wall of each PCB board bracket is provided with a mounting portion along the same plane, the mounting portion is used to fix the PCB board to be detected, and the mounting portion is arranged on the top of the magnetic ring; The driving mechanism is connected to the plurality of PCB board brackets to drive the plurality of PCB board brackets to expand or contract simultaneously.

2. The PCB board detection device according to claim 1, characterized in that: The driving mechanism is a multi-jaw chuck; The multi-jaw chuck comprises a step portion, a turntable portion, a plurality of fixing portions and a plurality of jaws; The plurality of fixing parts are arranged on the top of the step part, and a slideway is arranged between any two adjacent ones of the plurality of fixing parts, the plurality of claws correspond to the plurality of slideways one by one, and the claws are slidably connected with the corresponding slideways; the turntable part is sleeved on the step part, and the turntable part is arranged at the bottom of the fixing part, and the turntable part can rotate to drive the plurality of claws to expand or contract simultaneously along the slideway; The plurality of clamping claws correspond to the plurality of PCB board brackets one by one, and the clamping claws are fixedly connected to the corresponding PCB board brackets.

3. The PCB board detection device according to claim 2, characterized in that: The claw comprises a supporting portion and a connecting portion connected to each other; The PCB board bracket includes a main body and a flange portion arranged along the outer wall of the main body; The inner walls of the plurality of main bodies are arranged to form the accommodating cavity, and the inner wall of each main body is provided with the mounting portion along the same plane; The top end of the supporting portion is lower than the top end of the connecting portion, so as to form a step surface with the connecting portion for supporting the flange portion, and the connecting portion is fixedly connected to the flange portion.

4. The PCB board detection device according to claim 3, characterized in that: The mounting portion is a mounting groove formed on the inner wall of the main body.

5. The PCB board detection device according to claim 2, characterized in that: The PCB board detection device also includes a motor and a magnetic ring bracket; The magnetic ring is arranged on the top of the magnetic ring bracket; The motor is arranged at the bottom of the magnetic ring bracket, and the output shaft of the motor is connected to the magnetic ring bracket to drive the magnetic ring bracket and the magnetic ring to rotate; The magnetic ring bracket is cylindrical and passes through the middle of the multi-jaw chuck to the accommodating cavity.

6. The PCB board detection device according to claim 5, characterized in that: The PCB board detection device also includes a detection platform; The multi-claw chuck is fixed on the top of the detection platform, and the motor is fixed on the bottom of the detection platform; A through hole is provided in the middle of the detection platform, and the output shaft of the motor passes through the through hole and is fixedly connected to the magnetic ring bracket.

7. The PCB board detection device according to claim 5, characterized in that: The bottom of the magnetic ring bracket is sleeved on the output shaft of the motor, and the magnetic ring bracket is fixedly connected to the output shaft of the motor through a connecting piece.

8. The PCB board detection device according to claim 6, characterized in that: The detection platform is fixedly connected to the multi-jaw chuck via a connecting piece; A first protrusion is disposed on the top of the detection platform, and a first recess radially matched with the first protrusion is disposed on the bottom of the multi-jaw chuck.

9. The PCB board detection device according to claim 6, characterized in that: The detection platform is fixedly connected to the motor via a connecting piece; A second protrusion is disposed on the top of the motor, and a second recess radially matched with the second protrusion is disposed on the bottom of the detection platform.

10. The PCB board detection device according to any one of claims 2 to 9, characterized in that: The PCB board detection device also includes an operating handle; The operating handle is fixedly connected to the turntable portion to drive the turntable portion to rotate.

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