A vibration table fixed PCB board jig

Abstract

This utility model relates to a PCB board fixing fixture for a vibration table, including a fixing plate with multiple fixing through holes and multiple mounting blocks. Each mounting block includes a magnetic suction part and a connecting part. The magnetic suction part is magnetically attached to the fixing plate, and the connecting part is detachably located at the end of the magnetic suction part away from the fixing plate. The end of the connecting part away from the magnetic suction part has a connecting threaded hole, and the end of the magnetic suction part away from the fixing plate has a disassembly threaded hole. The connecting part has a threaded post for engaging with the disassembly threaded hole, and the magnetic suction part has an anti-rotation mechanism. The fixing plate is fixed to the vibration testing equipment. The fixing holes on the PCB are secured to the mounting blocks by screws, and then the mounting blocks are adsorbed onto the surface of the fixing plate. This fixture can accommodate PCBs of different specifications with fixing holes in different positions, and can also accommodate PCBs of different thicknesses by disassembling and assembling different sized connecting parts.

Description

Technical Field

[0001] This utility model relates to the field of PCB vibration testing, and more specifically, to a PCB board fixing fixture for a vibration table. Background Technology

[0002] With the rapid development of the electronics and information industry, the reliability of electronic products is receiving increasing attention, and vibration testing is one of the indicators for verifying the reliability of electronic products. Vibration testing simulates the various vibration environments that products encounter during transportation, installation, and use, determining whether the product can withstand various environmental vibrations and evaluating the resistance of components, parts, and the entire machine in the expected transportation and use environments. In vibration testing of electronic products, how to rigidly fix the PCB board to the vibration table has always been a challenge for testers.

[0003] Traditional PCB vibration fixtures use threaded holes to secure the PCB to the fixture with screws before vibration testing. Since the threaded holes cannot be moved, the vibration fixture is designed for specific PCBs, resulting in poor compatibility. Furthermore, threading holes for each different PCB model on the vibration fixture can lead to a chaotic situation. Finding the corresponding threaded hole when securing the PCB with screws is time-consuming and laborious, and the threads are prone to stripping over time, rendering the vibration fixture unusable. Utility Model Content

[0004] To address the aforementioned shortcomings of existing technologies, a vibration table fixture for fixing PCB boards is provided.

[0005] The technical solution adopted by this utility model to solve its technical problem is: a vibration table fixture for fixing a PCB board, including a fixing plate, a plurality of fixing through holes provided on the fixing plate, and a plurality of mounting blocks magnetically attracted to the fixing plate. Each mounting block includes a magnetic attraction part and a connecting part. The magnetic attraction part is magnetically attracted to the fixing plate, and the connecting part is detachably located at the end of the magnetic attraction part away from the fixing plate. The end of the connecting part away from the magnetic attraction part is provided with a connecting threaded hole, and the end of the magnetic attraction part away from the fixing plate is provided with a disassembly threaded hole. The connecting part is provided with a threaded post for engaging with the disassembly threaded hole. The connecting threaded hole and the threaded post are located at opposite ends of the connecting part. The magnetic attraction part is provided with an anti-rotation mechanism to prevent the connecting part from rotating after the connecting part is threadedly connected.

[0006] Preferably, the anti-rotation mechanism includes a gear, an anti-rotation block, a first magnetic attractor, and a slider. The gear is fixedly disposed at the end of the threaded post away from the connecting part. The bottom of the disassembly threaded hole is provided with a clearance groove to avoid the gear. One end of the anti-rotation block meshes with the gear. The slider is disposed at the end of the anti-rotation block away from the gear. The magnetic attractor is provided with a groove for the slider to slide away from the gear. The surface of the slider away from the bottom of the groove is coplanar with the surface of the magnetic attractor away from the fixed plate. The slider is provided with anti-slip stripes on the surface away from the bottom of the groove. The first magnetic attractor is embedded in the inner sidewall of the groove near the center of the magnetic attractor, and the first magnetic attractor is magnetically attracted to the slider.

[0007] Preferably, the end of the slide groove away from the center of the magnetic attraction part is an open structure, and a slide rod is provided on the side wall of the slide groove. The two ends of the slide rod are connected to the two opposite inner side walls of the slide groove. The slide rod is located on the side wall of the slide groove away from the center of the magnetic attraction part, and the slider is provided with a strip-shaped through hole for the slide rod to slide relative to each other.

[0008] Preferably, both the magnetic suction part and the connecting part are cylindrical structures, the diameter of the connecting part is smaller than the diameter of the magnetic suction part, and the axis of the magnetic suction part and the axis of the connecting part are collinear.

[0009] Preferably, the end of the magnetic suction part away from the connecting part is provided with a second magnetic suction element that magnetically attracts the fixing plate.

[0010] Preferably, the fixing plate has a square structure, and the plurality of fixing through holes are located near the edge of the fixing plate, and the plurality of fixing through holes are also arranged at equal intervals along the edge of the fixing plate.

[0011] Preferably, the corners of the fixing plate are chamfered.

[0012] Preferably, the fixing plate is made of ferritic stainless steel with a galvanized surface.

[0013] The beneficial effects of this utility model are as follows: the fixing plate is fixed to the vibration testing equipment by screws and fixing through holes. The fixing holes on the PCB are locked onto the mounting block by screws. Then, the mounting block is attracted to the surface of the fixing plate, thereby fixing the PCB to the fixing plate. The mounting block can be magnetically attracted to any position on the surface of the fixing plate, so that this fixture can be compatible with PCBs of different specifications with fixing holes set in different positions. It can also be compatible with PCBs of different thicknesses by disassembling and assembling different specifications of connecting parts, preventing interference between electronic components on the PCB and the fixing plate. When disassembling the PCB, the screws on the connecting part are rotated counterclockwise. Due to the anti-rotation mechanism, the connecting part will not be rotated along with it, and the connecting part can also be prevented from loosening or falling off. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0015] Figure 2 This is a cross-sectional schematic diagram of the mounting block according to an embodiment of this utility model;

[0016] Figure 3 This is a schematic diagram of the magnetic suction part and the connecting part according to an embodiment of the present invention;

[0017] Figure 4 This is a schematic diagram of the overall structure after the PCB is fixed in an embodiment of this utility model.

[0018] Reference numerals: 1. Fixing plate; 10. Fixing through hole; 2. Mounting block; 20. Magnetic suction part; 200. Disassembly and assembly threaded hole; 21. Connecting part; 210. Connecting threaded hole; 211. Threaded post; 22. Clearance groove; 3. Second magnetic suction part; 4. Slider; 40. Strip through hole; 5. Gear; 50. Anti-rotation block; 51. First magnetic suction part; 6. Slide groove; 7. Slide rod. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. In addition, the directional terms mentioned in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," and "outer," are only for reference to the directions in the accompanying drawings. The directional terms are used to better and more clearly explain and understand this utility model, and are not intended to indicate or imply the necessary orientation of this utility model. Therefore, they should not be construed as limitations on this utility model.

[0020] Examples of embodiments of this utility model Figures 1 to 4As shown, a PCB board fixing fixture for a vibration table includes a fixing plate 1 with multiple fixing through holes 10. The fixing plate 1 also has multiple mounting blocks 2 that are magnetically attracted to it. Each mounting block 2 includes a magnetic attraction part 20 and a connecting part 21. The magnetic attraction part 20 is magnetically attached to the fixing plate 1, and the connecting part 21 is detachably mounted on the end of the magnetic attraction part 20 away from the fixing plate 1. Preferably, the bottom end of the magnetic attraction part 20 is attached to the fixing plate 1, and the connecting part 21 is detachably mounted on the top surface of the magnetic attraction part 20. A connecting threaded hole 210 is provided at the end of the connecting part 21 away from the magnetic attraction part 20. The connecting threaded hole 210 is a blind hole; after vibration weakens the magnetism of the magnetic attraction part 20, the connecting part 21 can be detached. The magnetic part 20 can be installed onto the new magnetic part 20 and then used again. The magnetic part 20 with weakened magnetism can be sent for remagnetization. The end of the magnetic part 20 away from the fixed plate 1 is provided with a disassembly threaded hole 200, that is, the disassembly threaded hole 200 is located on the top surface of the magnetic part 20. The connecting part 21 is provided with a threaded post 211 for cooperating with the disassembly threaded hole 200. The connecting threaded hole 210 and the threaded post 211 are located at opposite ends of the connecting part 21, that is, the connecting threaded hole 210 is located on the bottom surface of the connecting part 21, and the threaded post 211 is located on the top surface of the connecting part 21. The connecting part 21 can be disassembled and installed on the magnetic part 20 through the threaded post 211 and the disassembly threaded hole 200. The magnetic part 20 is provided with an anti-rotation mechanism to prevent the connecting part 21 from rotating after the connecting part 21 is threaded.

[0021] The fixing plate 1 is horizontally fixed to the vibration testing equipment by screws and fixing through holes 10. The fixing holes on the PCB are used to lock the PCB onto the mounting block 2 by screws. Then, the magnetic part 20 of the mounting block 2 is used to attract the PCB onto the surface of the fixing plate 1, thereby fixing the PCB onto the fixing plate 1. The mounting block 2 can be magnetically attracted to any position on the surface of the fixing plate 1, so that this fixture can be compatible with PCBs of different specifications with fixing holes set in different positions. It can also be compatible with PCBs of different thicknesses by disassembling and assembling different specifications of connecting parts 21, preventing interference between the electronic components on the PCB and the fixing plate 1. The anti-rotation mechanism prevents the connecting part 21 from rotating relative to the magnetic part 20 when the PCB is locked onto the connecting part 21 of the mounting block 2.

[0022] When disassembling the PCB, rotate the screw on the connector 21 counterclockwise. Due to the anti-rotation mechanism, the connector 21 will not rotate with it, and the connector 21 will not loosen or fall off.

[0023] Further improvements, such as Figure 2 and Figure 3As shown, the anti-rotation mechanism includes a gear 5, an anti-rotation block 50, a first magnetic suction element 51, and a slider 4. The gear 5 is fixedly disposed at the end of the threaded post 211 away from the connecting part 21, that is, the gear 5 is located at the bottom end of the threaded post 211. The gear 5 and the threaded post 211 are integrally formed. The bottom of the disassembly threaded hole 200 is provided with a relief groove 22 to avoid the gear 2. One end of the anti-rotation block 50 meshes with the gear 5. The slider 4 is disposed at the end of the anti-rotation block 50 away from the gear 5. The magnetic suction part 20 is provided with a sliding groove 6 for the slider 4 to slide away from the gear 5. That is, the side wall of the relief groove 22 is provided with a sliding through hole communicating with the sliding groove 6. The anti-rotation block 50 is away from the gear 5. One end of the slider 4 passes through the sliding through hole and is connected to the slider 4. The surface of the slider 4 away from the bottom of the groove 6 is coplanar with the surface of the magnetic suction part 20 away from the fixed plate 1. That is, the top surface of the slider 4 is coplanar with the top surface of the magnetic suction part 20. The slider 4 is provided with anti-slip stripes on the surface away from the bottom of the groove 6. That is, the top surface of the slider 4 is provided with anti-slip stripes, which facilitates the sliding of the slider 4 to disengage the anti-rotation block 50 and the gear 5, thereby rotating the connecting part 21 to replace the connecting part 21 of different specifications. The first magnetic suction member 51 is embedded in the inner side wall of the groove 6 near the center of the magnetic suction part 20. The first magnetic suction member 51 is magnetically attracted to the slider 4, and the first magnetic suction member 51 prevents the anti-rotation block 50 and the gear 5 from disengaging.

[0024] Further improvements, such as Figure 2 and Figure 3 As shown, the end of the slide groove 6 away from the center of the magnetic attraction part 20 is an open structure. A slide rod 7 is provided on the side wall of the slide groove 6. The two ends of the slide rod 7 are connected to the two opposite inner side walls of the slide groove 6. The slide rod 7 is located on the side of the side wall of the slide groove 6 away from the center of the magnetic attraction part 20, that is, the two ends of the slide rod 7 are connected to the front and rear side walls of the slide groove 6 and are located on the left side of the slide groove 6. The slider 4 is provided with a strip-shaped through hole 40 for the slide rod 7 to slide relative to each other. The strip-shaped through hole 40 extends in the left and right direction. The slider 4 is limited by the slide rod 7 and the strip-shaped through hole 40 to prevent the slider 4 from being lost after sliding out of the slide groove 6.

[0025] Further improvements, such as Figure 2 and Figure 3 As shown, both the magnetic suction part 20 and the connecting part 21 are cylindrical structures. The diameter of the connecting part 21 is smaller than the diameter of the magnetic suction part 20. The axis of the magnetic suction part 20 and the axis of the connecting part 21 are collinear. The connecting part 21 and the magnetic suction part 20 make the mounting block 2 narrower at the top and wider at the bottom, which can avoid electronic components on the PCB.

[0026] Further improvements, such as Figure 1 and Figure 2As shown, the magnetic suction part 20 is provided with a second magnetic suction member 3 that is magnetically attracted to the fixing plate 1 at one end away from the connecting part 21. The magnetic suction part 20 is attracted to the fixing plate 1 by the second magnetic suction member 3 embedded on the bottom surface of the magnetic suction part 20.

[0027] Further improvements, such as Figure 1 and Figure 4 As shown, the fixing plate 1 has a square structure, and a plurality of fixing through holes 10 are located near the edge of the fixing plate 1. The plurality of fixing through holes 10 are also arranged at equal intervals along the edge of the fixing plate 1. There are sixteen fixing through holes 10, which means that there are five fixing through holes 10 on each side of the fixing plate 1. The sixteen fixing through holes 10 facilitate fixing the fixing plate 1 to the testing equipment. The corners of the fixing plate 1 are all chamfered to prevent the fixing plate 1 from scratching the staff.

[0028] Further improvements, such as Figure 1 and Figure 4 As shown, the fixing plate 1 is made of ferritic stainless steel with a galvanized surface. While the ferritic stainless steel is magnetically attracted to the magnet, it can also prevent the fixing plate 1 from rusting, thus avoiding the reduction of the magnetic force between the fixing plate 1 and the magnetic attraction part 20 of the mounting block 2 due to rusting. After the surface of the fixing plate 1 is galvanized, the rust resistance of the fixing plate 1 is increased.

[0029] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A PCB board fixing fixture for a vibration table, comprising a fixing plate; characterized in that, The fixing plate is provided with multiple fixing through holes; the fixing plate is also provided with multiple mounting blocks that are magnetically attracted to the fixing plate; each mounting block includes a magnetic attraction part and a connecting part; the magnetic attraction part is magnetically attracted to the fixing plate; the connecting part is detachably located at the end of the magnetic attraction part away from the fixing plate; the end of the connecting part away from the magnetic attraction part is provided with a connecting threaded hole; the end of the magnetic attraction part away from the fixing plate is provided with a disassembly threaded hole; the connecting part is provided with a threaded post for engaging with the disassembly threaded hole; the connecting threaded hole and the threaded post are located at opposite ends of the connecting part; the magnetic attraction part is provided with an anti-rotation mechanism to prevent the connecting part from rotating after the connecting part is threadedly connected.

2. The PCB board fixing fixture for a vibration table according to claim 1, characterized in that, The anti-rotation mechanism includes a gear, an anti-rotation block, a first magnetic attractor, and a slider; the gear is fixedly disposed at the end of the threaded post away from the connecting part; the bottom of the disassembly threaded hole is provided with a clearance groove to avoid the gear; one end of the anti-rotation block meshes with the gear; the slider is disposed at the end of the anti-rotation block away from the gear; the magnetic attractor is provided with a groove for the slider to slide away from the gear; the surface of the slider away from the bottom of the groove is coplanar with the surface of the magnetic attractor away from the fixed plate; the slider is provided with anti-slip stripes on the surface of the slider away from the bottom of the groove; the first magnetic attractor is embedded in the inner sidewall of the groove near the center of the magnetic attractor, and the first magnetic attractor is magnetically attracted to the slider.

3. The PCB board fixing fixture for a vibration table according to claim 2, characterized in that, The end of the slide groove away from the center of the magnetic attraction part is open; a slide rod is provided on the side wall of the slide groove; the two ends of the slide rod are connected to the two opposite inner side walls of the slide groove; the slide rod is located on the side wall of the slide groove away from the center of the magnetic attraction part; the slider is provided with a strip-shaped through hole for the slide rod to slide relative to each other.

4. The PCB board fixing fixture for a vibration table according to claim 1, characterized in that, Both the magnetic suction part and the connecting part are cylindrical structures; the diameter of the connecting part is smaller than the diameter of the magnetic suction part; the axis of the magnetic suction part and the axis of the connecting part are collinear.

5. A PCB board fixing fixture for a vibration table according to claim 1, characterized in that, The magnetic part is provided with a second magnetic element that magnetically attracts the fixed plate at one end away from the connecting part.

6. The PCB board fixing fixture for a vibration table according to claim 1, characterized in that, The fixing plate has a square structure; the multiple fixing through holes are located near the edge of the fixing plate; the multiple fixing through holes are also arranged at equal intervals along the edge of the fixing plate.

7. A PCB board fixing fixture for a vibration table according to claim 6, characterized in that, The corners of the fixing plate are all chamfered.

8. A PCB board fixing fixture for a vibration table according to claim 1, characterized in that, The fixing plate is made of ferritic stainless steel with a galvanized surface.

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