PCB ejector pin pneumatic control device and method

Abstract

This invention discloses a pneumatic control device and method for PCB ejector pins, specifically relating to the field of pneumatic control devices for ejector pins. It includes a base with a bottom plate fixedly mounted on its bottom, and an air inlet on one side of the bottom plate. This invention controls the position of the air baffle plate within the inflation chamber by controlling the length of the PCB board, facilitating the introduction of gas from the inflation chamber into multiple air guide slots at corresponding distances. This gas is then fed into multiple ejector chambers, driving multiple ejector pins and caps to form an ejection structure. The area lifted by the multiple ejector pins and caps corresponds to the length of the PCB board, allowing for flexible adaptation to different PCB board lengths and high versatility. Simultaneously, a locking mechanism utilizes excess gas pressure within the inflation chamber to move multiple extrusion blocks in the air channels to both sides. Under gas pressure, this causes rubber pads to approach and press against the outer wall of the ejector pins, creating a locking effect and ensuring the stability of the PCB board's ejector pins during pneumatic control.

Description

Technical Field

[0001] This invention relates to the field of pneumatic control devices for ejector pins, and more specifically, to a pneumatic control device and method for PCB ejector pins. Background Technology

[0002] The pneumatic needle valve includes a solenoid valve, a cylinder, a valve needle, and a fixed connector; the solenoid valve and the cylinder are connected by several air pipes, and the fixed connector is used to make the solenoid valve and the cylinder form a relatively fixed positional relationship.

[0003] However, most traditional pneumatic control devices for ejector pins used in PCBs have a fixed layout. When dealing with PCBs of different sizes and with different component distributions, it is necessary to frequently change the matching ejector pin templates. This is cumbersome and lacks versatility, which leads to an imbalance of forces on the PCB, causing warping and deformation, and in turn, uneven solder paste printing thickness, affecting product quality. Meanwhile, the existing technology lacks a structure for timely locking and fixing, meaning that the ejector pins on the PCB board lack the effect of timely fixing during pneumatic control, thus failing to guarantee the stability of the ejector pins on the PCB board during pneumatic control.

[0004] To address the aforementioned technical shortcomings, a solution is provided. Summary of the Invention

[0005] This invention provides a PCB ejector pin pneumatic control device and method to solve the technical problems mentioned in the background art, such as the fact that most traditional ejector pin pneumatic control devices for PCB boards have a fixed layout, the operation of replacement and adaptation is cumbersome and the universality is poor, and the lack of a timely locking and fixing structure in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a PCB ejector pin pneumatic control device, comprising a base, a bottom plate fixedly mounted on the bottom of the base, an air inlet on one side of the bottom plate, an air ejector mechanism inside the base, and a distance fixing mechanism outside the base. The air ejector mechanism and the distance fixing mechanism can control the ejection range according to the length of the PCB board, that is, the ejection range of the PCB board can be flexibly controlled according to the length of the PCB board. A locking mechanism is provided inside the base, which can clamp the PCB board after it is ejected to ensure the stability of the PCB board.

[0007] In a preferred embodiment, the air-cushioning mechanism includes an inflation chamber located at the bottom of the base plate. One side of the inflation chamber is connected to an air inlet. The top of the inflation chamber is provided with a plurality of air guide grooves, and the top of the plurality of air guide grooves is connected to a plurality of top air chambers. The plurality of top air chambers are located inside the base.

[0008] In a preferred embodiment, the interior of the plurality of top air chambers is provided with piston pads, the plurality of piston pads are arranged in a horizontal state, the top of the plurality of piston pads is fixedly installed with a pin, the plurality of pins are slidably installed on the inner wall of the base, the plurality of pins are arranged in a vertical state, and the top of the plurality of pins is fixedly installed with a cap.

[0009] In a preferred embodiment, the distance-fixing mechanism includes an air baffle plate slidably installed inside the inflation chamber. The outer wall of the air baffle plate is in contact with the inner wall of the inflation chamber. A pushing rod is fixedly installed on one side of the air baffle plate, and the pushing rod penetrates the inner wall of the inflation chamber. A pushing plate is fixedly installed on one outer wall of the pushing rod. The pushing plate is slidably installed on both outer walls of the base plate. The pushing plate is U-shaped and horizontal. Positioning plates are fixedly installed on both outer walls of the pushing plate, and the two positioning plates are perpendicular to each other with respect to the pushing plate.

[0010] In a preferred embodiment, the outer walls of both sides of the push plate are provided with a plurality of metal clips, which are rotatably mounted on the outer walls of both sides of the base plate. The plurality of metal clips are arranged in a one-to-one correspondence with a plurality of ejector pins. The outer walls of the plurality of metal clips are staggered with the positioning plate. Rollers are provided on the top of the plurality of metal clips. Magnets are provided on the outer walls of the plurality of metal clips. The magnets are fixedly mounted on the outer walls of both sides of the base plate, and the magnets are in contact with the outer walls of the metal clips.

[0011] In a preferred embodiment, the locking mechanism includes a thrust chamber communicating with the top of the air inlet. The thrust chamber is formed on the inner wall of the base. A locking piston is provided at the top of the thrust chamber. The outer wall of the locking piston is in contact with the inner wall of the air inlet. A compression spring is fixedly installed at the top of the locking piston. The compression spring is fixedly installed on the inner wall of the base. A venting groove is communicated with the top of the thrust chamber. The venting groove is formed at the top of the base and cooperates with a plurality of ejector pins.

[0012] In a preferred embodiment, multiple sliding rods are fixedly installed on both sides of the center of the ventilation groove. The multiple sliding rods are arranged symmetrically in pairs, and two of the sliding rods are arranged horizontally. An extrusion block is slidably installed on the outer wall of each of the two sliding rods. The outer wall of the two extrusion blocks cooperates with the outer wall of the ejector pin. A tension spring is fixedly installed on the outer wall of the extrusion block, and the tension spring is fixedly installed on the inner wall of the ventilation groove.

[0013] In a preferred embodiment, a sealing strip is fixedly installed on the outer wall of the extrusion block, the outer wall of the sealing strip is in contact with the inner wall of the vent groove, and a rubber pad is fixedly installed on one side of the extrusion block, the rubber pad cooperating with the outer wall of the ejector pin.

[0014] A method for using a pneumatic control device for PCB ejector pins, characterized by comprising the following steps: Step 1: Press the metal clips from top to bottom along the length of the PCB board. The corresponding metal clips rotate to both sides and open, allowing air to enter the inflation chamber through the air inlet. At this time, the air baffle in the inflation chamber is forced to move backward, causing the inflation chamber to fill with gas. The gas in the inflation chamber is then fed into multiple top air chambers through multiple air guide grooves. Step 2: The gas entering the multiple top air chambers pushes the piston pad, which in turn moves the piston pad upward under pressure, causing multiple ejector pins and caps to move upward to form the ejection structure; Step 3: After the gas can no longer be filled into the inflation chamber, the gas enters the pushing chamber. When the gas pressure in the pushing chamber is greater than the elastic pressure of the compression spring, the gas pushes the locking piston upward in the pushing chamber, and then the gas continues to enter the ventilation groove. Step 4: Under the action of the sealing strip, the multiple extrusion blocks in the venting groove slide to both sides due to the gas. The multiple extrusion blocks slide on the outer wall of the slide rod under pressure and stretch the tension spring. Finally, under the gas pressure, the rubber pad moves closer to and squeezes the outer wall of the ejector pin.

[0015] The technical effects and advantages of this invention are as follows: 1. This invention, by setting up an air-lift mechanism and a distance-fixing mechanism, controls the position of the air-separating plate in the inflation chamber according to the length of the PCB board. This facilitates the introduction of gas from the inflation chamber into multiple air guide grooves at corresponding distances, and into multiple air-lifting chambers, driving multiple ejector pins and caps to form an ejection structure. Thus, the area lifted by the multiple ejector pins and caps corresponds to the length of the PCB board, which can freely adapt to different PCB boards of different lengths, has extremely high versatility, and avoids the situation where the PCB board is unbalanced in force, causing warping and deformation, which in turn causes uneven thickness of solder paste printing and affects product quality.

[0016] 2. The locking mechanism is also designed to use the excess gas pressure in the inflation chamber to move multiple extrusion blocks in the ventilation groove to both sides. Under the gas pressure, the rubber pads are brought close to and squeezed against the outer wall of the ejector pins, thus locking multiple ejector pins and ensuring the stability of the ejector pins on the PCB board under pneumatic control. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a front view of the present invention.

[0019] Figure 3 This is a vertical sectional view of the present invention.

[0020] Figure 4 This is a schematic diagram of the distance-fixing mechanism in this invention.

[0021] Figure 5 This is a bottom view of the distance-fixing mechanism in this invention.

[0022] Figure 6 This is a vertical sectional view of the locking mechanism in this invention.

[0023] Figure 7 This is a cross-sectional view of the locking mechanism in this invention.

[0024] The attached diagram is labeled as follows: 1. Base; 2. Base plate; 3. Air inlet; 4. Air-lifting mechanism; 41. Inflation chamber; 42. Air guide groove; 43. Air-lifting chamber; 44. Piston pad; 45. Ejector pin; 46. Cap; 5. Distance fixing mechanism; 51. Air baffle plate; 52. Push rod; 53. Push belt plate; 54. Positioning plate; 55. Metal clamping strip; 56. Roller; 57. Magnet block; 6. Locking mechanism; 61. Air-lifting chamber; 62. Positioning piston; 63. Compression spring; 64. Air vent; 65. Slide rod; 66. Extrusion block; 67. Tension-limiting spring; 68. Sealing strip; 69. Rubber pad. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0026] Traditional pneumatic control equipment for ejector pins used in PCB boards is mostly fixed in layout. When dealing with PCB boards of different sizes and with varying component distributions, it is necessary to frequently change the appropriate ejector pin template. This is cumbersome and lacks versatility, leading to unbalanced stress on the PCB board, causing warping and deformation, which in turn results in uneven solder paste printing thickness and affects product quality. To solve this problem, the following technical solution is proposed: Refer to the instruction manual appendix Figures 1-7 A pneumatic control device for PCB ejector pins, such as Figure 1 , Figure 2 and Figure 6 As shown, the device includes a base 1, a base plate 2 fixedly mounted on the bottom of the base 1, an air inlet 3 on one side of the base plate 2, an air lifting mechanism 4 inside the base 1, and a distance fixing mechanism 5 outside the base 1. The air lifting mechanism 4 and the distance fixing mechanism 5 can control the lifting range according to the length of the PCB board, that is, they can flexibly control the lifting range of the PCB board according to the length of the PCB board. The base 1 also has a locking mechanism 6 inside, which can clamp the PCB board after it is lifted to ensure the stability of the PCB board.

[0027] like Figure 1 and Figure 3 As shown, the air-cushioning mechanism 4 includes an air-filled cavity 41 located at the bottom of the base plate 2. One side of the air-filled cavity 41 is connected to the air inlet 3. The top of the air-filled cavity 41 is provided with multiple air guide grooves 42. The top of the multiple air guide grooves 42 is connected to multiple air-filled cavities 43. The multiple air-filled cavities 43 are located inside the base 1. Air enters the inflation chamber 41 through the air inlet 3, and the gas in the inflation chamber 41 is fed into multiple top air chambers 43 through multiple air guide grooves 42.

[0028] like Figure 2 and Figure 3 As shown, the interior of the multiple top air chambers 43 is provided with piston pads 44, the multiple piston pads 44 are arranged in a horizontal state, the top of the multiple piston pads 44 is fixedly installed with ejector pins 45, the multiple ejector pins 45 are slidably installed on the inner wall of the base 1, the multiple ejector pins 45 are arranged in a vertical state, and the top of the multiple ejector pins 45 is fixedly installed with caps 46. Gas entering multiple top air chambers 43 pushes piston pad 44, which in turn moves upward under pressure, causing multiple ejector pins 45 and caps 46 to move upward to form an ejection structure.

[0029] like Figure 3 and Figure 5 As shown, the distance fixing mechanism 5 includes an air baffle plate 51 that is slidably installed inside the inflation chamber 41. The outer wall of the air baffle plate 51 is in contact with the inner wall of the inflation chamber 41. A push rod 52 is fixedly installed on one side of the air baffle plate 51. The push rod 52 penetrates the inner wall of the inflation chamber 41. A push belt plate 53 is fixedly installed on one side of the outer wall of the push rod 52. The push belt plate 53 is slidably installed on both sides of the outer wall of the base plate 2. The push belt plate 53 is U-shaped and horizontal. A locking plate 54 is fixedly installed on both sides of the outer wall of the push belt plate 53. The two locking plates 54 are perpendicular to each other with the push belt plate 53. The distance that the push plate 53 moves on both sides of the outer wall of the base plate 2 is the distance that the air baffle 51 moves in the inflation chamber 41. The air baffle 51 can control the amount of gas entering the top air chamber 43 and the number of ejector pins 45 in the inflation chamber 41.

[0030] like Figure 3 and Figure 4As shown, multiple metal clips 55 are provided on the outer walls of both sides of the push plate 53. The multiple metal clips 55 are rotatably installed on the outer walls of both sides of the base plate 2. The multiple metal clips 55 are arranged in a one-to-one correspondence with multiple ejector pins 45. The outer walls of the multiple metal clips 55 are interleaved with the positioning plate 54. Rollers 56 are provided on the top of the multiple metal clips 55. Magnet blocks 57 are provided on the outer walls of the multiple metal clips 55. The multiple magnet blocks 57 are fixedly installed on the outer walls of both sides of the base plate 2. The magnet blocks 57 are in contact with the outer walls of the metal clips 55. Multiple metal clips 55 are initially attracted by the magnet 57, so the carding plate 54 is stuck by the metal clips 55 and cannot move. After the PCB board presses the roller 56 on the top of the metal clips 55 from top to bottom, the metal clips 55 at the corresponding positions rotate to the sides and open, so the carding plate 54 can move the corresponding distance.

[0031] In specific implementation, after the PCB board is pressed from top to bottom along the roller 56 at the top of the metal clip strip 55, the metal clip strip 55 at the corresponding position rotates and opens to both sides. Then, the locking plates 54 on both sides of the push plate 53 can pass over the distance of the opened metal clip strip 55. As a result, the push rod 52 and the air baffle plate 51 driven by the push plate 53 can move the same distance and enter the inflation chamber 41 through the air inlet 3. At this time, the air baffle plate 51 in the inflation chamber 41 is forced to move backward, so that the inflation chamber 41 is filled with gas. The distance that the air baffle plate 51 moves corresponds to the distance that the push plate 53 moves when it is unlocked. Thus, the gas in the inflation chamber 41 is input into multiple top air chambers 43 through multiple air guide grooves 42, and the length of the multiple top air chambers 43 corresponds to the length of the PCB board. Gas entering multiple top air chambers 43 pushes piston pads 44, which in turn moves upward under pressure, causing multiple ejector pins 45 and caps 46 to move upward to form an ejection structure. Thus, the area lifted by multiple ejector pins 45 and caps 46 corresponds to the length of the PCB board, which can be freely adapted to different PCB boards of different lengths. It has extremely high versatility and avoids the PCB board being unbalanced in force, causing warping and deformation, which in turn causes uneven thickness of solder paste printing and affects product quality. Example 2

[0032] The existing technology lacks a timely locking and fixing structure, meaning it lacks the ability to promptly fix the ejector pins on the PCB board during pneumatic control, thus failing to guarantee the stability of the ejector pins during pneumatic control. To solve this problem, the following technical solution is proposed: like Figure 6 and Figure 7As shown, the locking mechanism 6 includes a thrust chamber 61 connected to the top of the air inlet 3. The thrust chamber 61 is opened on the inner wall of the base 1. A locking piston 62 is provided on the top of the thrust chamber 61. The outer wall of the locking piston 62 is in contact with the inner wall of the air inlet 3. A compression spring 63 is fixedly installed on the top of the locking piston 62. The compression spring 63 is fixedly installed on the inner wall of the base 1. A venting groove 64 is connected to the top of the thrust chamber 61. The venting groove 64 is opened on the top of the base 1. The venting groove 64 cooperates with a plurality of ejector pins 45. When the gas pressure in the air-push chamber 61 exceeds the elastic pressure of the compression spring 63, the gas pushes the locking piston 62 upward in the air-push chamber 61, and then the gas continues to enter the ventilation groove 64.

[0033] like Figure 6 and Figure 7 As shown, multiple sliding rods 65 are fixedly installed on both sides of the center of the ventilation groove 64. The multiple sliding rods 65 are arranged symmetrically in pairs. Two sliding rods 65 are arranged in a horizontal state. Extrusion blocks 66 are slidably installed on the outer walls of the two sliding rods 65. The outer walls of the two extrusion blocks 66 cooperate with the outer walls of the ejector pins 45. A tension spring 67 is fixedly installed on the outer wall of the extrusion block 66. The tension spring 67 is fixedly installed on the inner wall of the ventilation groove 64. Multiple top-pressing blocks 66 within the ventilation groove 64 slide against the outer wall of the slide bar 65 under pressure, stretching the tension spring 67.

[0034] like Figure 7 As shown, a sealing strip 68 is fixedly installed on the outer wall of the extrusion block 66. The outer wall of the sealing strip 68 fits against the inner wall of the vent groove 64. A rubber pad 69 is fixedly installed on one side of the extrusion block 66. The rubber pad 69 cooperates with the outer wall of the ejector pin 45. The sealing strip 68 on the outer wall of the extrusion block 66 is pushed by the gas, causing the rubber pad 69 to approach and squeeze the outer wall of the ejector pin 45.

[0035] In practical implementation, after the gas in the inflation chamber 41 can no longer be filled, the gas enters the pushing chamber 61. When the gas pressure in the pushing chamber 61 is greater than the elastic pressure of the compression spring 63, the gas pushes the locking piston 62 upward in the pushing chamber 61. Then the gas continues to enter the ventilation groove 64. Then, the multiple pressing blocks 66 in the ventilation groove 64 slide to both sides under the action of the sealing strip 68. The multiple pressing blocks 66 slide on the outer wall of the slide rod 65 under pressure and stretch the tension spring 67. Finally, under the gas pressure, the rubber pad 69 moves closer to and squeezes the outer wall of the ejector pin 45, forming a locking effect on the multiple ejector pins 45, ensuring the stability of the ejector pins of the PCB board during pneumatic control.

[0036] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change. Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other. In conclusion, the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pneumatic control device for PCB ejector pins, comprising a base (1), wherein a base plate (2) is fixedly mounted on the bottom of the base (1), and an air inlet (3) is provided on one side of the base plate (2), characterized in that, The base (1) is provided with an air-lifting mechanism (4) inside and a distance-fixing mechanism (5) outside. The air-lifting mechanism (4) and the distance-fixing mechanism (5) can control the lifting range according to the length of the PCB board, that is, the lifting range of the PCB board can be flexibly controlled according to the length of the PCB board. The base (1) is provided with a locking mechanism (6) inside. The locking mechanism (6) can clamp the PCB board after lifting it to ensure the stability of the PCB board.

2. The PCB ejector pin pneumatic control device according to claim 1, characterized in that: The air-top mechanism (4) includes an air-filled cavity (41) at the bottom of the base plate (2). One side of the air-filled cavity (41) is connected to the air inlet (3). The top of the air-filled cavity (41) is provided with multiple air guide grooves (42). The top of the multiple air guide grooves (42) is connected to multiple top air chambers (43). The multiple top air chambers (43) are located inside the base (1).

3. The PCB ejector pin pneumatic control device and method according to claim 2, characterized in that: The interior of each of the multiple top air chambers (43) is provided with piston pads (44), the multiple piston pads (44) are arranged in a horizontal state, the top of each of the multiple piston pads (44) is fixedly installed with a pin (45), the multiple pins (45) are slidably installed on the inner wall of the base (1), the multiple pins (45) are arranged in a vertical state, and the top of each of the multiple pins (45) is fixedly installed with a cap (46).

4. The PCB ejector pin pneumatic control device according to claim 3, characterized in that: The distance fixing mechanism (5) includes an air baffle (51) slidably installed inside the inflation chamber (41). The outer wall of the air baffle (51) is in contact with the inner wall of the inflation chamber (41). A push rod (52) is fixedly installed on one side of the air baffle (51). The push rod (52) penetrates the inner wall of the inflation chamber (41). A push plate (53) is fixedly installed on one side of the outer wall of the push rod (52). The push plate (53) is slidably installed on both sides of the outer wall of the base plate (2). The push plate (53) is U-shaped and horizontal. A locking plate (54) is fixedly installed on both sides of the outer wall of the push plate (53). The two locking plates (54) are perpendicular to the push plate (53).

5. The PCB ejector pin pneumatic control device according to claim 4, characterized in that: The outer walls of the push plate (53) are provided with a plurality of metal clips (55). The plurality of metal clips (55) are rotatably installed on the outer walls of the base plate (2). The plurality of metal clips (55) are arranged in a one-to-one correspondence with the plurality of ejector pins (45). The outer walls of the plurality of metal clips (55) are interleaved with the positioning plate (54). Rollers (56) are provided on the top of the plurality of metal clips (55). Magnet blocks (57) are provided on the outer walls of the plurality of metal clips (55). The plurality of magnet blocks (57) are fixedly installed on the outer walls of the base plate (2). The magnet blocks (57) are in contact with the outer walls of the metal clips (55).

6. The PCB ejector pin pneumatic control device according to claim 3, characterized in that: The locking mechanism (6) includes a thrust chamber (61) connected to the top of the air inlet (3). The thrust chamber (61) is opened on the inner wall of the base (1). A locking piston (62) is provided on the top of the thrust chamber (61). The outer wall of the locking piston (62) is in contact with the inner wall of the air inlet (3). A compression spring (63) is fixedly installed on the top of the locking piston (62). The compression spring (63) is fixedly installed on the inner wall of the base (1). A ventilation groove (64) is connected to the top of the thrust chamber (61). The ventilation groove (64) is opened on the top of the base (1). The ventilation groove (64) cooperates with a plurality of ejector pins (45).

7. A PCB ejector pin pneumatic control device according to claim 6, characterized in that: Multiple sliding rods (65) are fixedly installed on both sides of the center of the ventilation groove (64). The multiple sliding rods (65) are arranged symmetrically in pairs. Two of the sliding rods (65) are arranged horizontally. An extrusion block (66) is slidably installed on the outer wall of the two sliding rods (65). The outer wall of the two extrusion blocks (66) cooperates with the outer wall of the ejector pin (45). A tension spring (67) is fixedly installed on the outer wall of the extrusion block (66). The tension spring (67) is fixedly installed on the inner wall of the ventilation groove (64).

8. A PCB ejector pin pneumatic control device according to claim 7, characterized in that: A sealing strip (68) is fixedly installed on the outer wall of the extrusion block (66). The outer wall of the sealing strip (68) is in contact with the inner wall of the ventilation groove (64). A rubber pad (69) is fixedly installed on one side of the extrusion block (66). The rubber pad (69) cooperates with the outer wall of the ejector pin (45).

9. A method of using a PCB ejector pin pneumatic control device, comprising the PCB ejector pin pneumatic control device as described in any one of claims 1-8, characterized in that, Includes the following steps: Step 1: Press the metal clip strip (55) from top to bottom along the length of the PCB board. The metal clip strip (55) at the corresponding position rotates to open on both sides and enters the inflation chamber (41) through the air inlet (3). At this time, the air baffle (51) in the inflation chamber (41) is forced to move backward, so that the inflation chamber (41) is filled with gas. The gas in the inflation chamber (41) is input into multiple top air chambers (43) through multiple air guide grooves (42). Step 2: The gas entering the multiple top air chambers (43) pushes the piston pad (44), and then the piston pad (44) moves upward under pressure, causing multiple ejector pins (45) and caps (46) to move upward to form an ejected structure; Step 3: After the gas can no longer be filled into the inflation chamber (41), the gas enters the pushing chamber (61). When the gas pressure in the chamber is greater than the elastic pressure of the compression spring (63), the gas pushes up the locking piston (62) in the pushing chamber (61) and moves it upward, and then the gas continues to enter the ventilation groove (64). Step 4: Multiple extrusion blocks (66) in the ventilation groove (64) slide to both sides under the action of the sealing strip (68) due to the gas. Multiple extrusion blocks (66) slide on the outer wall of the slide rod (65) under pressure and stretch the tension spring (67). Finally, under the gas pressure, the rubber pad (69) is driven to approach and squeeze the outer wall of the ejector pin (45).

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