PCBA test pre-power-on jig

Abstract

The application discloses a PCBA test pre-power-on jig and belongs to the field of jigs. The lower pressing force of a mechanical hand and PCBA can compress an air bag and an elastic reset part, extrude the liquid in the air bag to the inside of a gas passage, push the magnetic fluid in the hydraulic pipeline to the upper side of an upper clamping plate, lift the gravity center of the upper clamping plate, and press the elastic reset part and the upper clamping plate downward at the same time, so that the PCBA is pressed. While the sliding plug moves left, the pull rope pulls the sliding block to move left, pulls the magnetic isolation plate into the passage, and exposes the magnetic stripe. The downward magnetic plate is attracted to the magnetic stripe, the clamping force of the upper clamping plate is effectively improved, after processing, the mechanical hand takes out the PCBA plate and lifts the upper clamping plate at the same time, the upper clamping plate is reset through the elastic reset part, the air bag returns to the original state, the sliding plug moves right and pushes the magnetic isolation plate out and covers the magnetic stripe, and the magnetic isolation is realized. Meanwhile, the magnetic fluid flows back into the hydraulic pipeline, so that the upper clamping plate and the lower clamping plate maintain a certain opening angle.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of jigs, more particularly to a PCBA test pre-power-on jig. BACKGROUND

[0002] The PCBA test jig is a very important equipment in the PCBA processing factory, which is generally placed at the end of the production link to detect whether the product is perfect. In the process of making and testing the PCBA test jig, it is necessary to meet the specified requirements to improve the accuracy of the test and the quality of the shipment. The PCBA test jig is a jig specially used for testing the function, power calibration, life, performance, etc. of the product. It is mainly used for testing various indicators of the product on the PCBA production line.

[0003] During the processing of PCBA, a mechanical hand is usually used to clamp and place the PCBA on different worktables, and then a clamping piece is used for clamping and fixing. However, before placing the PCBA, the mechanical hand needs to lift the clamping plate in advance, which is a complex operation procedure. Similarly, when taking out the PCBA, the clamping plate also needs to be lifted. Therefore, the mechanical hand needs to repeatedly lift the PCBA during placement and removal, which not only reduces the work efficiency, but also is not convenient for stable clamping of the PCBA.

[0004] Therefore, we propose a PCBA test pre-power-on jig to solve the problems of complex clamping process and insufficient clamping force. SUMMARY

[0005] 1. Technical problem to be solved

[0006] In view of the problems existing in the prior art, the purpose of the present application is to provide a PCBA test pre-power-on jig. The downward pressure of the mechanical hand and the PCBA will compress the air bag and the elastic reset piece, extrude the liquid in the air bag to the air passage, push the magnetic fluid in the hydraulic pipeline to the upper clamping plate, lift the center of gravity of the upper clamping plate, and at the same time, the elastic reset piece is bent and the upper clamping plate is pressed down, so as to press the PCBA. At the same time, the sliding block is pulled to the left, the magnetic plate is pulled into the channel, the magnetic strip is exposed, the downward magnetic plate is attracted to the magnetic strip, the clamping force of the upper clamping plate is effectively improved, the PCBA board is prevented from being displaced and having poor contact due to unstable clamping, and after processing, the mechanical hand takes out the PCBA board while lifting the upper clamping plate, the elastic reset piece resets the upper clamping plate, the air bag returns to its original state, the sliding plug moves to the right and pushes the magnetic plate out, covering the magnetic strip, isolating the magnetism, at the same time, the magnetic fluid flows back into the hydraulic pipeline, so as to keep a certain opening angle between the upper clamping plate and the lower clamping plate.

[0007] 2. Technical scheme

[0008] A PCBA test pre-power-on jig, comprising a jig body, positioning holes are formed at four corners of the jig body, a battery box is installed on the jig body, one end of the battery box is provided with a power display screen, a processing panel is installed on the jig body, guide blocks are fixedly connected at four corners of the processing panel, charging probes are installed below the guide blocks, a plurality of round holes are formed on the processing panel, a plurality of clamping assemblies are fixedly installed at the upper and lower ends of the processing panel;

[0009] The clamping assembly comprises an upper clamping plate and a lower clamping plate, and the upper clamping plate and the lower clamping plate are rotationally connected through a rotating shaft, a plurality of elastic return members are fixedly connected between the upper clamping plate and the lower clamping plate, a plurality of groups of hydraulic pipes are formed in the inner walls of the upper clamping plate and the lower clamping plate, the hydraulic pipes of the same group are communicated through communication hoses, a groove communicated with the hydraulic pipes is formed in the upper end side wall of the lower clamping plate away from the upper clamping plate, a magnetic strip is fixedly connected to the bottom of the groove, a magnetic shielding plate is slidably connected to the inner wall of the hydraulic pipe close to the groove, a sliding block is slidably connected to the inner wall of the hydraulic pipe close to the magnetic shielding plate, a guide rod is fixedly connected between the sliding block and the magnetic shielding plate, a fixed block is fixedly connected to the inner wall of the hydraulic pipe close to the sliding block, and the fixed block and the sliding block are connected through a spring, a sliding plug is sealingly and slidably connected to the inner wall of the hydraulic pipe in the lower clamping plate, a magnetic fluid is filled in the space between the hydraulic pipe in the upper clamping plate and the sliding plug, a pull rope is fixedly connected to the side wall of the sliding block, and the pull rope penetrates through the fixed block and is fixedly connected to the sliding plug, a plurality of air bags are fixedly connected to the upper end side wall of the lower clamping plate, and the air bags are filled with liquid, and an air passage is communicated between the air bags and the hydraulic pipes. The lower pressure of the mechanical hand and the PCBA will compress the air bag and the elastic return member, extruding the liquid in the air bag to the inside of the air passage, the liquid will push the sliding plug to move left, and in turn push the magnetic fluid in the hydraulic pipe to the upper clamping plate, to lift the center of gravity of the upper clamping plate, at the same time, the elastic return member is bent and the upper clamping plate is pressed down, so as to press the PCBA, while the sliding plug moves left, the pull rope pulls the sliding block to move left, the magnetic shielding plate is pulled into the channel, and the magnetic strip is exposed, the magnetic shielding plate is attracted to the magnetic strip, effectively improving the clamping force of the upper clamping plate, preventing the PCBA from being displaced and contacting poorly due to unstable clamping, after processing, the mechanical hand takes out the PCBA plate while lifting the upper clamping plate, the upper clamping plate is reset through the elastic return member, the air bag returns to its original state, the sliding plug moves right to push the magnetic shielding plate out and cover it above the magnetic strip, and the magnetic shielding plate is isolated from the magnetic property, at the same time, the magnetic fluid flows back into the hydraulic pipe, so that the upper clamping plate and the lower clamping plate maintain a certain opening angle.

[0010] Further, the elastic return member comprises a hollow cylinder, and a rubber rod is fixedly connected to the inner wall of the hollow cylinder, the hollow cylinder is in a corrugated shape, and the hollow cylinder is made of rubber material, the rubber rod is made of flexible elastic material, and the elastic rubber rod can lift the upper clamping plate to realize the function of fast resetting.

[0011] Further, the air bag is in an oval spherical shape, and a silica gel pad is fixedly connected to the upper surface of the air bag, which protects the upper surface of the air bag and prevents the air bag from being damaged or leaking during clamping.

[0012] Further, the number of elastic reset members is two, and the two elastic reset members are symmetrically distributed on the two sides of the upper clamping plate and the lower clamping plate, and the elastic reset members distributed on the two sides have enough force to reset and support the upper clamping plate.

[0013] Further, the upper end side wall of the upper clamping plate is fixedly embedded with a magnetic guide plate, and the magnetic guide plate is close to the upper end of the hydraulic pipeline, the magnetic guide plate has an attracting effect on the magnetic fluid in the hydraulic pipeline, so as to change the center of gravity of the upper clamping plate and achieve clamping effect.

[0014] Further, the rotation angle of the upper clamping plate is 70-90°, and the upper end inner wall of the upper clamping plate is fixedly embedded with a counterweight, which can increase the clamping force of the upper clamping plate and prevent loosening and misplacement.

[0015] Further, the area of the magnetic separation plate is larger than that of the magnetic strip, and the magnetic separation plate adopts a hollow structure, which can completely cover the magnetic strip, thereby effectively isolating the magnetism and not affecting the lifting of the upper clamping plate.

[0016] Further, the elastic reset member and the air bag are on the same straight line, and the lower end of the elastic reset member is away from the vertical line where the uppermost end of the upper clamping plate is located, so that the PCBA can be accurately pressed on the air bag, and the elastic reset member can provide certain anti-collision protection for the front end of the PCBA.

[0017] 3. Beneficial effects

[0018] Compared with the prior art, the advantages of the present application are:

[0019] (1) The downward pressure of the mechanical hand and the PCBA will compress the air bag and the elastic reset member, and the liquid in the air bag will be squeezed into the air passage, the liquid will push the sliding plug to move left, and then the magnetic fluid in the hydraulic pipeline will be pushed to the upper side of the upper clamping plate to lift the center of gravity of the upper clamping plate, at the same time, the elastic reset member is bent and the upper clamping plate is pressed down, so as to press the PCBA, the sliding plug moves left at the same time, the pull rope pulls the sliding block to move left, the magnetic separation plate is pulled into the channel, the magnetic strip is exposed, the downward magnetic guide plate is attracted to the magnetic strip, effectively improving the clamping force of the upper clamping plate, preventing the PCBA board from being unstable, and preventing the PCBA board from being dislocated and contacting poorly, after processing, the mechanical hand takes out the PCBA board, at the same time, the upper clamping plate is lifted, the elastic reset member resets the upper clamping plate, the air bag returns to the original state, the sliding plug moves right to push the magnetic separation plate out and cover it on the magnetic strip, and at the same time, the magnetic fluid flows back into the hydraulic pipeline, so that the upper clamping plate and the lower clamping plate maintain a certain opening angle.

[0020] (2) The elastic reset piece comprises a hollow cylinder, and the inner wall of the hollow cylinder is fixedly connected with a rubber rod, the hollow cylinder is in a corrugated shape, and the hollow cylinder is made of rubber material, the rubber rod is made of flexible elastic material, the elastic rubber rod can lift the upper clamping plate to realize the function of quick resetting, and the built-in rubber rod can also improve the toughness of the elastic reset piece.

[0021] (3) The air bag is in an elliptical spherical shape, and the upper surface of the air bag is fixedly connected with a silica gel pad, the elliptical spherical air bag can quickly rebound downward, and the silica gel pad protects the upper surface of the air bag to prevent the air bag from being worn and damaged during clamping.

[0022] (4) The number of elastic reset pieces is two, and the two elastic reset pieces are symmetrically distributed on the two sides of the upper clamping plate and the lower clamping plate, the elastic reset pieces distributed on the two sides have enough force to reset and support the upper clamping plate, and the PCBA can also quickly bend when being pressed on the elastic reset piece, so that the upper clamping plate is pressed down.

[0023] (5) The upper end side wall of the upper clamping plate is fixedly embedded with a magnetic plate, and the magnetic plate is close to the upper end of the hydraulic pipeline, the magnetic plate has an attractive effect on the magnetic fluid in the hydraulic pipeline, so as to change the center of gravity of the upper clamping plate and achieve the clamping effect.

[0024] (6) The rotation angle of the upper clamping plate is 70-90°, and the upper end inner wall of the upper clamping plate is fixedly embedded with a counterweight, the counterweight can increase the clamping force of the upper clamping plate to prevent loosening and misplacement.

[0025] (7) The area of the magnetic separation plate is larger than that of the magnetic strip, and the magnetic separation plate adopts a hollow structure, so that the magnetic strip can be completely covered, thereby effectively isolating the magnetism and not affecting the lifting of the upper clamping plate.

[0026] (8) The elastic reset piece and the air bag are on the same straight line, and the lower end of the elastic reset piece is away from the vertical line of the uppermost end of the upper clamping plate, so that the PCBA can be accurately pressed on the air bag and the elastic reset piece, and the elastic reset piece can provide certain anti-collision protection for the front end of the PCBA. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a working change diagram of the clamping assembly of the application;

[0028] Figure 2 is a top view of the pre-power-on jig of the application;

[0029] Figure 3 is Figure 2 a clamping assembly structure diagram;

[0030] Figure 4 is Figure 3 a side view of the clamping assembly;

[0031] Figure 5 is a schematic diagram of the air bag rebound state;

[0032] Figure 6 is a schematic diagram of the air bag down state;

[0033] Figure 7 is a schematic diagram of the upper clamp plate lifting work diagram;

[0034] Figure 8 is a schematic diagram of the elastic reset member structure;

[0035] Figure 9 is Figure 8 a sectional view of the elastic reset member.

[0036] Explanation of reference numerals in the drawings:

[0037] 1, jig body; 2, positioning hole; 3, battery box; 4, power display screen; 5, processing panel; 6, guide block; 7, charging probe; 8, round hole; 9, clamping assembly; 901, upper clamp plate; 902, pivot; 903, lower clamp plate; 904, magnetic plate; 905, elastic reset member; 906, air bag; 907, groove; 908, magnetic stripe; 909, magnetic separation plate; 910, guide rod; 911, sliding block; 912, pull rope; 913, fixed block; 914, hydraulic pipeline; 915, sliding plug; 916, airway; 917, rubber rod. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0039] Embodiment 1:

[0040] The present application provides a PCBA test pre-power-on jig, please refer to Figure 2 , including jig body 1, the four corners of jig body 1 are provided with positioning hole 2, and battery box 3 is installed on jig body 1, one end of battery box 3 is provided with power display screen 4, processing panel 5 is installed on jig body 1, guide block 6 is fixedly connected at the four corners of processing panel 5, and charging probe 7 is installed below guide block 6, a plurality of round holes 8 are formed in processing panel 5, and a plurality of clamping assemblies 9 are fixedly installed at the upper and lower ends of processing panel 5;

[0041] Please refer to Figure 3 、 Figure 4 、 Figure 8 and Figure 9The clamping assembly 9 comprises an upper clamping plate 901 and a lower clamping plate 903, and the upper clamping plate 901 and the lower clamping plate 903 are rotationally connected through a rotating shaft 902. A plurality of elastic reset members 905 are fixedly connected between the upper clamping plate 901 and the lower clamping plate 903. The number of the elastic reset members 905 is two, and the two elastic reset members 905 are symmetrically distributed on the two sides of the upper clamping plate 901 and the lower clamping plate 903. The elastic reset members 905 distributed on the two sides have enough force to reset and support the upper clamping plate 901. The elastic reset member 905 comprises a hollow cylinder, and the inner wall of the hollow cylinder is fixedly connected with a rubber rod 917. The hollow cylinder is in a corrugated shape, and the hollow cylinder is made of rubber material. The rubber rod 917 is made of flexible elastic material. The elastic rubber rod 917 can lift the upper clamping plate 901 to realize the function of rapid resetting.

[0042] Please refer to Figures 5-7The rotating angle of the upper clamping plate 901 is 70-90°, and a counterweight is fixedly embedded in the upper end inner wall of the upper clamping plate 901, which can increase the clamping force of the upper clamping plate 901 and prevent loosening and misalignment. The inner walls of the upper clamping plate 901 and the lower clamping plate 903 are provided with a plurality of hydraulic pipes 914, and the same group of hydraulic pipes 914 are connected through communication hoses. The upper end side wall of the upper clamping plate 901 is fixedly embedded with a magnetic plate 904, and the magnetic plate 904 is close to the upper end of the hydraulic pipe 914. The magnetic plate 904 has an attractive effect on the magnetic fluid in the hydraulic pipe 914, thereby changing the center of gravity of the upper clamping plate 901 and achieving clamping effect. The upper end side wall of the lower clamping plate 903 away from the upper clamping plate 901 is provided with a groove 907 communicating with the hydraulic pipe 914, and the bottom of the groove 907 is fixedly connected with a magnetic strip 908. The inner wall of the hydraulic pipe 914 close to the groove 907 is slidably connected with a magnetic shielding plate 909, and the area of the magnetic shielding plate 909 is larger than that of the magnetic strip 908. The magnetic shielding plate 909 is of a hollow structure, which can completely cover the magnetic strip 908, thereby effectively isolating the magnetism and not affecting the lifting of the upper clamping plate 901. The inner wall of the hydraulic pipe 914 close to the magnetic shielding plate 909 is slidably connected with a sliding block 911, and the sliding block 911 and the magnetic shielding plate 909 are fixedly connected with a guide rod 910. The inner wall of the hydraulic pipe 914 close to the sliding block 911 is fixedly connected with a fixed block 913, and the fixed block 913 and the sliding block 911 are connected through a spring. The inner wall of the hydraulic pipe 914 in the lower clamping plate 903 is also sealingly and slidably connected with a sliding plug 915, and the space between the hydraulic pipe 914 in the upper clamping plate 901 and the sliding plug 915 is filled with magnetic fluid. The side wall of the sliding block 911 is fixedly connected with a pull rope 912, and the pull rope 912 penetrates through the fixed block 913 and is fixedly connected with the sliding plug 915. The upper end side wall of the lower clamping plate 903 is fixedly connected with a plurality of air bags 906, which are elliptical spherical in shape. The upper surface of the air bag 906 is fixedly connected with a silica gel pad, which protects the upper surface of the air bag and prevents the air bag 906 from being worn and damaged during clamping. The air bag 906 is filled with liquid, and the air bag 906 and the hydraulic pipe 914 are connected with an air passage 916. The elastic return member 905 and the air bag 906 are on the same straight line, and the lower end of the elastic return member 905 is away from the vertical line of the uppermost end of the upper clamping plate 901, so that the PCBA can be accurately pressed on the air bag 906. The elastic return member 905 provides certain anti-collision protection for the front end of the PCBA.

[0043] When the manipulator places the PCBA board on the lower clamp plate 903, the downward pressure of the manipulator and the PCBA will compress the air bag 906 and the elastic return member 905, extruding the liquid inside the air bag 906 into the air passage 916, which will push the magnetic fluid inside the hydraulic pipeline 914 to the upper side of the upper clamp plate 901, thereby lifting the center of gravity of the upper clamp plate 901, while the elastic return member 905 is bent and the upper clamp plate 901 is pressed down, thereby pressing the PCBA; the pull rope 912 is connected with the sliding plug 915, the fixed block 913 and the sliding block 911 from left to right, and when the sliding plug 915 moves to the left, the pull rope 912 will pull the sliding block 911 to the left, so as to pull the magnetic plate 909 into the channel and expose the magnetic strip 908, and the downward magnetic plate 904 is attracted to the magnetic strip 908, effectively improving the clamping force of the upper clamp plate 901, preventing the PCBA board from being displaced and having poor contact due to unstable clamping; after processing, the manipulator takes out the PCBA board while lifting the upper clamp plate 901, and the elastic return member 905 resets the upper clamp plate 901, the air bag 906 returns to its original state, the sliding plug 915 moves to the right, pushes the magnetic plate 909 out and covers it above the magnetic strip 908, thereby isolating the magnetism, and at the same time, the magnetic fluid flows back into the hydraulic pipeline 914, so that the upper clamp plate 901 and the lower clamp plate 903 maintain a certain opening angle.

[0044] The above is only the preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can make equivalent replacement or change according to the technical solution and the improvement concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A pre-power-on fixture for PCBA testing, comprising a fixture body (1), wherein positioning holes (2) are provided at all four corners of the fixture body (1), and a battery box (3) is mounted on the fixture body (1), a power display screen (4) is provided at one end of the battery box (3), a processing panel (5) is mounted on the fixture body (1), guide blocks (6) are fixedly connected at all four corners of the processing panel (5), and charging probes (7) are installed below the guide blocks (6), and a plurality of round holes (8) are provided on the processing panel (5), characterized in that: Multiple clamping components (9) are fixedly installed at the upper and lower ends of the processing panel (5). The clamping assembly (9) includes an upper clamping plate (901) and a lower clamping plate (903), which are rotatably connected by a pivot (902). Multiple elastic reset members (905) are fixedly connected between the upper clamping plate (901) and the lower clamping plate (903). Multiple sets of hydraulic pipes (914) are opened on the inner walls of both the upper clamping plate (901) and the lower clamping plate (903), and the hydraulic pipes (914) in the same set are connected by a pivot (902). The connecting hose is connected, and the upper side wall of the lower clamping plate (903) away from the upper clamping plate (901) has a groove (907) that communicates with the hydraulic pipe (914), and a magnetic strip (908) is fixedly connected to the bottom of the groove (907). A magnetic shielding plate (909) is slidably connected to the inner wall of the hydraulic pipe (914) near the groove (907), and a sliding block (911) is slidably connected to the inner wall of the hydraulic pipe (914) near the magnetic shielding plate (909). A guide rod (910) is fixedly connected between the block (911) and the magnetic shielding plate (909). A fixing block (913) is fixedly connected to the inner wall of the hydraulic pipe (914) near the sliding block (911), and the fixing block (913) and the sliding block (911) are connected by a spring. The inner wall of the hydraulic pipe (914) located in the lower clamping plate (903) is also sealed and slidably connected with a sliding plug (915), and the hydraulic pipe (914) located in the upper clamping plate (901) is also sealed and slidably connected to the sliding block (914). The space between the sliding block (911) and the sliding plug (915) is filled with magnetic fluid. A pull rope (912) is fixedly connected to the side wall of the sliding block (911), and the pull rope (912) passes through the fixed block (913) and is fixedly connected to the sliding plug (915). A plurality of airbags (906) are fixedly connected to the upper side wall of the lower clamping plate (903), and the airbags (906) are filled with liquid. A vent (916) is connected between the airbags (906) and the hydraulic pipe (914). The elastic reset member (905) includes a hollow column, and a rubber rod (917) is fixedly connected to the inner wall of the hollow column. The hollow column is corrugated and made of rubber material, while the rubber rod (917) is made of flexible elastic material. The airbag (906) is ellipsoidal in shape, and a silicone pad is fixedly connected to the upper surface of the airbag (906). The number of elastic reset members (905) is two, and the two elastic reset members (905) are symmetrically distributed on both sides of the upper clamping plate (901) and the lower clamping plate (903); The upper sidewall of the upper clamping plate (901) is fixedly inlaid with a magnetic guide plate (904), and the magnetic guide plate (904) is close to the upper end of the hydraulic pipe (914).

2. The PCBA test pre-power-on fixture according to claim 1, characterized in that: The upper clamping plate (901) has a rotation angle of 70-90°, and a counterweight is fixedly embedded in the upper inner wall of the upper clamping plate (901).

3. The PCBA test pre-power-on fixture according to claim 1, characterized in that: The area of ​​the magnetic shielding plate (909) is larger than the area of ​​the magnetic strip (908), and the magnetic shielding plate (909) adopts a hollow structure.

4. A PCBA test pre-power-on fixture according to claim 1, characterized in that: The elastic reset member (905) and the airbag (906) are located on the same straight line, and the lower end of the elastic reset member (905) is far away from the vertical line where the uppermost end of the upper clamp (901) is located.

5. A method for using a PCBA test pre-power-on fixture according to any one of claims 1-4, characterized in that: Includes the following steps: S1. When the robot places the PCBA board on the lower clamping plate (903), the downward pressure of the robot and the PCBA will compress the airbag (906) and the elastic reset member (905), squeezing the liquid inside the airbag (906) into the ventilation channel (916). The liquid will push the slide plug (915) to the left, thereby pushing the magnetofluid inside the hydraulic pipe (914) to the top of the upper clamping plate (901) to raise the center of gravity of the upper clamping plate (901). At the same time, the elastic reset member (905) is bent and the upper clamping plate (901) is pressed down, thereby pressing the PCBA. S2. The pull rope (912) is connected to the slide block (915), the fixing block (913) and the sliding block (911) from left to right. When the slide block (915) moves to the left, the pull rope (912) will pull the sliding block (911) to the left, pulling the magnetic shielding plate (909) into the channel, exposing the magnetic strip (908). The downward-pressed magnetic guide plate (904) attracts the magnetic strip (908), effectively improving the clamping force of the upper clamping plate (901) and preventing the PCBA board from shifting and making poor contact due to unstable clamping. S3. After processing, the robot will lift the upper clamp (901) while taking out the PCBA board. The upper clamp (901) will be reset by the elastic reset component (905), the airbag (906) will return to its original state, the slide plug (915) will move to the right, and the magnetic shield (909) will be pushed out to cover the magnetic strip (908) to isolate the magnetism. At the same time, the magnetic fluid will flow back into the hydraulic pipe (914) to keep the upper clamp (901) and the lower clamp (903) at a certain opening and closing angle.

Images