A clamping mechanism for processing double-sided circuit PCB boards

Abstract

The present invention relates to the technical field of PCB processing, and in particular to a clamping mechanism for processing a double-sided circuit PCB, comprising a processing table and an air pump bolted to the upper end of the processing table, an electric push rod fixedly connected to the bottom end of the air pump, a welding assembly fixedly connected to the bottom end of the electric push rod, a placing mechanism placed on the upper surface of the lower end of the processing table, a protective mechanism provided on the upper surface of the lower end of the processing table, and an automatic flipping mechanism provided on one side wall of the processing table. The clamping mechanism for processing a double-sided circuit PCB provided by the present invention, through the setting of the automatic flipping mechanism, only requires simple operation of the air pump and the electric push rod, and the PCB can be flipped when the PCB and the welding assembly are lifted and lowered, and can be flipped in the same direction multiple times, so that the welding assembly can perform welding processing on both sides of the PCB multiple times, thereby improving the processing accuracy and the welding efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of PCB board processing, in particular to a clamping mechanism for processing a double-sided circuit PCB board. Background Art

[0002] The development of PCB boards has a history of more than 100 years. Its design is mainly layout design. The main advantage of using circuit boards is that it greatly reduces wiring and assembly errors, improves the level of automation and production labor rate. PCB boards can be divided into single-sided boards, double-sided boards, four-layer boards, six-layer boards and other multi-layer boards according to the number of layers of the circuit boards.

[0003] In the prior art, most spot welding workbenches can only perform spot welding on one side, and then the circuit board needs to be manually flipped, which affects the continuity of the circuit board spot welding and reduces the overall work efficiency. Since the PCB board is relatively thin, when clamping, if the clamping force is too large, the PCB board is easy to tilt. If the clamping force is too small, the PCB board is easy to shift during spot welding, thereby affecting the spot welding effect. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a clamping mechanism for processing a double-sided circuit PCB.

[0005] The present invention adopts the following technical scheme: a clamping mechanism for processing a double-sided circuit PCB board, comprising a processing table and an air pump bolted to the upper end of the processing table, an electric push rod fixed to the bottom end of the air pump, a welding assembly fixed to the bottom end of the electric push rod, a placing mechanism placed on the upper surface of the lower end of the processing table, a protective mechanism provided on the upper surface of the lower end of the processing table, and an automatic flipping mechanism provided on one side wall of the processing table;

[0006] The automatic flipping mechanism includes a first gear rack slidably arranged inside one end of the processing table, and the upper end of the first gear rack is fixedly connected to the side wall of the bottom end of the air pump, the first gear rack is located on the processing table away from the air pump. A second gear rack is slidably arranged up and down, the first gear rack and the second gear rack are meshed and connected, and the third gear is rotatably arranged in the processing table, a rotating block is rotatably arranged on one side wall of the second gear rack, and the upper and lower end outer walls of the rotating block located in the second gear rack are movably inserted with limiting blocks, a third spring is fixedly connected between the inner end of the limiting block and the rotating block, special-shaped sliders are slidably arranged on two opposite sides of the rotating block, an extrusion frame is slidably inserted at the outer end of the rotating block, and a fourth spring is fixedly connected between the center of the inner end of the special-shaped slider and the rotating block. The gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear is engaged with the gear of the first gear and the gear

[0007] As a further description of the above technical solution: the protective mechanism includes a lifting rack that is slidably arranged on the upper surface of the bottom end of the processing table, and trapezoidal rods are slidably arranged at two opposite positions on the bottom side of the lifting rack. A first spring is fixedly connected between the bottom end of the lifting rack and the processing table, one side of the trapezoidal rod is located in the processing table and is meshed with a first gear, and the first gear is rotatably arranged in the processing table, and the top of the first gear is fixedly connected to a rotating rod rotatably arranged in the processing table, the upper end of the rotating rod extends to the upper side of the processing table, and the outer wall of the upper end of the rotating rod is fixedly connected to a protective baffle.

[0008] As a further description of the above technical solution: the placement mechanism includes a hollow square frame fixedly connected to one end of the transmission shaft, the hollow square frame is placed on a processing table, a placement groove is provided on a side wall of the hollow square frame away from the transmission shaft, a sliding plate is provided on the lower side of the placement groove and slides up and down in the hollow square frame, a sliding block is provided on one side of the sliding plate and slides up and down in the hollow square frame, a second gear is meshedly connected between the sliding block and the sliding plate, and the second gear is rotatably arranged in the hollow square frame, and a second spring is fixed between the upper end of the sliding block and the hollow square frame.

[0009] As a further description of the above technical solution: a strip plate is provided at one end of the rotating block extending outside the second gear rack.

[0010] As a further description of the above technical solution: a lifting block is movably inserted into the upper side of the slot at the bottom end of the first gear rack, a sixth spring is fixedly connected between the upper end of the lifting block and the first gear rack, a pushing block is slidably arranged on one side of the lifting block in the first gear rack, and one end of the pushing block is located outside the first gear rack.

[0011] As a further description of the above technical solution: a plurality of the sixth springs are provided, and the plurality of the sixth springs are arranged at equal intervals.

[0012] As a further description of the above technical solution: one end of the extrusion frame located outside the second gear rack is a conical structure.

[0013] As a further description of the above technical solution: a latching tooth is arranged at one end of the trapezoidal rod close to the first gear.

[0014] The present invention provides a clamping mechanism for processing a double-sided circuit PCB board by improvement, which has the following improvements and advantages compared with the prior art:

[0015] When the PCB needs to be welded on the reverse side, the electric push rod is started to move the welding assembly upward so that the hollow square frame can drive the PCB to flip over. Then the second gear rack is moved upward continuously, so that the push block pushes the rotating block by ninety degrees, and the strip plate at the outer end of the rotating block is pushed to a horizontal state. The hollow square frame is rotated ninety degrees again by the extrusion of the sliding plug rod. Then the welding assembly is moved downward by the air pump, and the hollow square frame is moved upward. The welding assembly is reset by the electric push rod to weld the reverse side of the PCB. Through the setting of the automatic flipping mechanism, only the simple operation of the air pump and the electric push rod is required. When the PCB and the welding assembly are lifted or lowered, the PCB can be flipped over, and the PCB can be flipped over in the same direction for multiple times, so that the welding assembly can perform welding processing on both sides of the PCB for multiple times, thereby improving the processing accuracy and the welding efficiency.

[0016] Second, after the hollow square frame rises, a return spring is fixedly connected between the end of the trapezoidal rod away from the lifting frame and the processing table, and the return spring makes the trapezoidal rod move toward one end of the lifting frame, and the protection frames on both sides are closed through the transmission of the trapezoidal rod, the first gear, the rotating rod and the protection frame. Through the setting of the protection mechanism, it can be automatically closed to prevent the splashing of powder during welding and cause harm to the workers;

[0017] Third: before use, first place the PCB board in the hollow square frame through the placement slot, then start the air pump, so that the air pump drives the first gear rack, the third gear and the second gear rack, so that the second gear rack drives the hollow square frame to move upward. When the hollow square frame moves upward, the sliding block moves downward under the elastic force of the second spring, and the sliding plate moves upward through the transmission of the sliding block, the second gear and the sliding plate, and the placement mechanism, so that the sliding plate automatically blocks one end of the PCB board, so that the circuit board is fixed;

[0018] In summary, through the setting of the automatic flipping mechanism, only simple operations of the air pump and the electric push rod are required. When the PCB board and the welding assembly are lifted or lowered, the PCB board can be flipped, and it can be flipped in the same direction multiple times, so that the welding assembly can weld both sides of the PCB multiple times, thereby improving the processing accuracy and the welding efficiency. Through the setting of the protective mechanism, it can be automatically closed to prevent powder from splashing during welding and causing harm to the staff. Through the placement mechanism, the sliding plate moves upward, and the sliding plate automatically blocks one end of the PCB board, so that the circuit board is fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments:

[0020] Figure 1 A schematic structural diagram of a clamping mechanism for processing a double-sided PCB board provided by an embodiment of the present invention;

[0021] Figure 2 A cross-sectional view of a processing table provided by an embodiment of the present invention;

[0022] Figure 3 A cross-sectional view of a hollow square frame provided by an embodiment of the present invention;

[0023] Figure 4 A schematic diagram of the structure of an automatic flipping mechanism provided by an embodiment of the present invention;

[0024] Figure 5 A partial cross-sectional view of a second gear rack provided by an embodiment of the present invention;

[0025] Figure 6 A schematic diagram of the structure of a special-shaped slider provided in an embodiment of the present invention;

[0026] Figure 7 A schematic diagram of the structure of a lifting block provided in an embodiment of the present invention;

[0027] Figure 8 A cross-sectional view of a first gear rack provided by an embodiment of the present invention;

[0028] Fig. 9 for Figure 2 The enlarged view of point A in the middle;

[0029] Fig.10 for Figure 2 Enlarged view of point B in the middle.

[0030] In the figure: 1, processing table; 2, air pump; 3, electric push rod; 4, welding assembly; 5, protection mechanism; 51, protection frame; 52, lifting frame; 53, first spring; 54, trapezoidal rod; 55, first gear; 56, rotating rod; 6, placement mechanism; 61, hollow square frame; 62, placement slot; 63, sliding plate; 64, sliding block; 65, second gear; 66, second spring; 7, automatic flip mechanism; 71, first gear rack; 72 , second gear rack; 73, third gear; 74, rotating block; 75, slot; 76, fixed sleeve rod; 77, sliding rod; 78, transmission shaft; 79, limit block; 710, third spring; 711, fourth gear; 712, extrusion frame; 713, fourth spring; 714, fifth spring; 715, lifting block; 716, pushing block; 717, sixth spring; 718, sliding groove; 719, fixed stop block; 720, special-shaped slider. DETAILED DESCRIPTION

[0031] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below with reference to specific diagrams. It should be noted that the embodiments and features in the embodiments of the present application can be combined with each other without conflict.

[0032] See also Figure 1-Figure 10 The embodiment of the present invention provides a technical solution: a clamping mechanism for processing a double-sided circuit PCB board, comprising a processing table 1 and an air pump 2 bolted to the upper end of the processing table 1, an electric push rod 3 fixed to the bottom end of the air pump 2, a welding assembly 4 fixed to the bottom end of the electric push rod 3, a placing mechanism 6 placed on the upper surface of the lower end of the processing table 1, a protective mechanism 5 provided on the upper surface of the lower end of the processing table 1, and an automatic flipping mechanism 7 provided on one side wall of the processing table 1;

[0033] The automatic flipping mechanism 7 includes a first gear rack 71 slidably arranged inside one end of the processing table 1, and the upper end of the first gear rack 71 is fixed to the side wall of the bottom end of the air pump 2, and the side of the first gear rack 71 away from the air pump 2 is located in the processing table 1 and is provided with a second gear rack 72 that slides up and down, and a third gear 73 is meshed and connected between the first gear rack 71 and the second gear rack 72, and the third gear 73 is rotatably arranged in the processing table 1, and a rotating block 74 is rotatably arranged on one side wall of the second gear rack 72, and the upper and lower end outer walls of the rotating block 74 located in the second gear rack 72 are movably inserted with a limit block 79, and the limit block 79 is inside A third spring 710 is fixedly connected between the end and the rotating block 74, and special-shaped sliders 720 are slidably arranged on two opposite sides of the rotating block 74. An extrusion frame 712 is slidably inserted into the outer end of the rotating block 74, and a fourth spring 713 is fixedly connected between the center of the inner end of the special-shaped slider 720 and the rotating block 74. A fourth gear 711 is fixedly connected to the end of the rotating block 74 away from the extrusion frame 712, and another fourth gear 711 is meshedly connected to one side of the fourth gear 711, and the end of the other fourth gear 711 away from the rotating block 74 is fixedly connected to a transmission shaft 78 rotatably arranged in the second gear frame 72. The fourth gear 711 is rotatably arranged in the second gear rack 72, a sliding groove 718 is opened on the side wall of the processing table 1 close to the extrusion frame 712, a fixed stopper 719 is fixedly connected in the sliding groove 718, one end of the extrusion frame 712 is located in the sliding groove 718, a fixed sleeve rod 76 is fixedly connected to one side of the fixed stopper 719 in the processing table 1, a sliding rod 77 is movably inserted at the other end of the fixed sleeve rod 76, and a fifth spring 714 is fixedly connected between one end of the sliding rod 77 and the fixed sleeve rod 76, a slot 75 is opened on the upper surface of the lower end of the second gear rack 72, and the slot 75 in the second gear rack 72 is located A square groove is provided on the lower side, and a strip plate is provided at one end of the rotating block 74 extending to the outside of the second gear rack 72. A lifting block 715 is movably inserted at the bottom of the first gear rack 71 on the upper side of the slot 75. A sixth spring 717 is fixedly connected between the upper end of the lifting block 715 and the first gear rack 71. A push block 716 is slidably provided in the first gear rack 71 on one side of the lifting block 715, and one end of the push block 716 is located outside the first gear rack 71. A plurality of sixth springs 717 are provided, and the plurality of sixth springs 717 are arranged at equal intervals. One end of the extrusion frame 712 located outside the second gear rack 72 is a conical structure.

[0034] Specifically, when the air pump 2 drives the first gear rack 71 to move downward, the second gear rack 72 drives the hollow square frame 61 to move upward, and then the welding assembly 4 welds the circuit board. When the PCB board needs to be welded on the reverse side, the electric push rod 3 is started to move the welding assembly 4 upward, so that the hollow square frame 61 can drive the PCB board to flip, and then the second gear rack 72 continues to move upward. When the bottom end of the lifting block 715 is inserted into the slot 75, the lifting block 715 presses the limit block 79 downward. When the limit block 79 is pressed downward to the lowest point, the limit block 79 presses the lifting block 715 upward, and the lifting block 715 moves the push block 716 to one end, so that the push block 716 pushes the rotating block 74 ninety degrees, and pushes the strip plate at the outer end of the rotating block 74 to a horizontal state. Afterwards, the special-shaped slider 720 rotates into the square groove, so that the rotating block 74 is limited and fixed, and then the hollow square frame 61 is moved downward, and the extrusion frame 712 is pressed inward by the fixed stop block 719, and then the special-shaped slider 720 slides inward, and the special-shaped slider 720 leaves the square groove. Through the extrusion of the sliding plug rod 77, the hollow square frame 61 rotates ninety degrees again, and then the welding assembly 4 is moved downward by the air pump 2, and the hollow square frame 61 is moved upward, and the welding assembly 4 is reset by the electric push rod 3, and the reverse side of the PCB board is welded. Only simple operations of the air pump 2 and the electric push rod 3 are required. When the PCB board and the welding assembly 4 are raised and lowered, the PCB board can be flipped, and it can be flipped in the same direction multiple times, so that the welding assembly 4 can weld both sides of the PCB multiple times, thereby improving the processing accuracy.

[0035] In another embodiment provided by the present invention, the protective mechanism 5 includes a lifting rack 52 which is slidably arranged on the upper surface of the bottom end of the processing table 1, and trapezoidal rods 54 are slidably arranged at two opposite positions on the bottom side of the lifting rack 52. A first spring 53 is fixedly connected between the bottom end of the lifting rack 52 and the processing table 1. One side of the trapezoidal rod 54 is located in the processing table 1 and is meshed with a first gear 55, and the first gear 55 is rotatably arranged in the processing table 1. The top of the first gear 55 is fixedly connected to a rotating rod 56 which is rotatably arranged in the processing table 1. The upper end of the rotating rod 56 extends to the upper side of the processing table 1, and the outer wall of the upper end of the rotating rod 56 is fixedly connected to a protective baffle 51, and a locking tooth is arranged at one end of the trapezoidal rod 54 close to the first gear 55.

[0036] Specifically, after the hollow square frame 61 rises, a return spring is fixedly connected between the end of the trapezoidal rod 54 away from the lifting bracket 52 and the processing table 1. The return spring causes the trapezoidal rod 54 to move toward one end of the lifting bracket 52. Through the transmission of the trapezoidal rod 54, the first gear 55, the rotating rod 56 and the protective bracket 51, the protective brackets 51 on both sides are closed to prevent powder from splashing during welding and causing harm to the workers.

[0037] In another embodiment provided by the present invention, the placement mechanism 6 includes a hollow square frame 61 fixedly connected to one end of the transmission shaft 78, the hollow square frame 61 is placed on the processing table 1, and a placement groove 62 is provided on a side wall of the hollow square frame 61 away from the transmission shaft 78, a sliding plate 63 is provided on the lower side of the placement groove 62 to slide up and down in the hollow square frame 61, a sliding block 64 is provided on one side of the sliding plate 63 to slide up and down in the hollow square frame 61, a second gear 65 is meshed and connected between the sliding block 64 and the sliding plate 63, and the second gear 65 is rotatably arranged in the hollow square frame 61, and a second spring 66 is fixed between the upper end of the sliding block 64 and the hollow square frame 61.

[0038] Specifically, before use, the PCB board is placed in the hollow square frame 61 through the placement groove 62, and then the air pump 2 is started, so that the air pump 2 is driven by the first gear rack 71, the third gear 73 and the second gear rack 72, so that the second gear rack 72 drives the hollow square frame 61 to move upward. When the hollow square frame 61 moves upward, the sliding block 64 will move downward under the elastic force of the second spring 66, and the sliding plate 63 is driven by the sliding block 64, the second gear 65 and the sliding plate 63 to move upward, so that the sliding plate 63 blocks one end of the PCB board, so that the circuit board is fixed.

[0039] Working principle: Before use, first place the PCB board in the hollow square frame 61 through the placement slot 62, then start the air pump 2, so that the air pump 2 drives the first gear rack 71, the third gear 73 and the second gear rack 72, so that the second gear rack 72 drives the hollow square frame 61 to move upward. When the hollow square frame 61 moves upward, the sliding block 64 moves downward under the elastic force of the second spring 66, and the sliding plate 63 moves upward through the transmission of the sliding block 64, the second gear 65 and the sliding plate 63, so that the sliding plate 63 blocks one end of the PCB board, so that the circuit board is fixed. After the hollow square frame 61 rises, the trapezoidal rod 54 A return spring is fixedly connected between the end away from the lifting bracket 52 and the processing table 1. The return spring makes the trapezoidal rod 54 move toward one end of the lifting bracket 52. Through the transmission of the trapezoidal rod 54, the first gear 55, the rotating rod 56 and the protective baffle 51, the protective baffles 51 on both sides are closed to prevent the splashing of powder during welding and cause harm to the staff. When the air pump 2 drives the first gear rack 71 to move downward, the second gear rack 72 drives the hollow square frame 61 to move upward, and then the welding assembly 4 welds the circuit board. When the PCB board needs to be welded on the back side, the electric push rod 3 is started to move the welding assembly 4 upward so that the hollow square When the lifting block 715 is pushed down to the lowest position, the limit block 79 presses the lifting block 715 upward, and the lifting block 715 moves the push block 716 to one end, so that the push block 716 pushes the rotating block 74 by ninety degrees, and pushes the strip plate at the outer end of the rotating block 74 to a horizontal state, and then the special-shaped slider 720 rotates into the square groove, so that the rotating block 74 is limited and fixed, and then the hollow square frame 61 is moved downward, and the extrusion frame 712 is pressed. The fixed stopper 719 is pressed inward, and then the special-shaped slider 720 slides inward, and the special-shaped slider 720 leaves the square groove. Through the squeezing of the sliding rod 77, the hollow square frame 61 rotates ninety degrees again, and then the welding component 4 is moved downward by the air pump 2, and the hollow square frame 61 moves upward. The welding component 4 is reset by the electric push rod 3, and the reverse side of the PCB board is welded. Only simple operations of the air pump 2 and the electric push rod 3 are required. When the PCB board and the welding component 4 are raised and lowered, the PCB board can be flipped, and it can be flipped in the same direction multiple times, so that the welding component 4 can weld both sides of the PCB multiple times, thereby improving the processing accuracy.

[0040] The basic principles, main features and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and the description in the specification are only to illustrate the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A clamping mechanism for processing a double-sided circuit PCB, comprising a processing table (1) and an air pump (2) bolted to the upper end of the processing table (1), characterized in that: The bottom end of the air pump (2) is fixedly connected to an electric push rod (3), the bottom end of the electric push rod (3) is fixedly connected to a welding assembly (4), a placement mechanism (6) is placed on the upper surface of the lower end of the processing table (1), a protection mechanism (5) is provided on the upper surface of the lower end of the processing table (1), and an automatic flipping mechanism (7) is provided on one side wall of the processing table (1); The automatic turning mechanism (7) comprises a first gear rack (71) slidably arranged inside one end of the processing table (1), and the upper end of the first gear rack (71) is fixedly connected to the side wall of the bottom end of the air pump (2), and a second gear rack (72) is slidably arranged in the processing table (1) on a side of the first gear rack (71) away from the air pump (2), and a third gear (73) is meshedly connected between the first gear rack (71) and the second gear rack (72), and the third gear (73) is rotatably arranged in the processing table (1), and a rotating gear (73) is rotatably arranged on one side wall of the second gear rack (72). The rotating block (74) is provided with a movable upper and lower outer wall of the rotating block (74) located in the second gear rack (72), and a limit block (79) is movably inserted, a third spring (710) is fixedly connected between the inner end of the limit block (79) and the rotating block (74), and two opposite sides of the rotating block (74) are slidably provided with a special-shaped slider (720), an extrusion frame (712) is slidably inserted at the outer end of the rotating block (74), a fourth spring (713) is fixedly connected between the center of the inner end of the special-shaped slider (720) and the rotating block (74), and the rotating block (74) is far away from the rotating block (74). A fourth gear (711) is fixedly connected to one end away from the extrusion frame (712), one side of the fourth gear (711) is meshedly connected to another fourth gear (711), and one end of the other fourth gear (711) away from the rotating block (74) is fixedly connected to a transmission shaft (78) rotatably arranged in the second gear frame (72), and the two fourth gears (711) are both rotatably arranged in the second gear frame (72), and a sliding groove (718) is opened on a side wall of the processing table (1) close to the extrusion frame (712), and the sliding groove (718) is fixedly connected to the transmission shaft (78) rotatably arranged in the second gear frame (72). A fixed stopper (719) is connected, one end of the extrusion frame (712) is located in a sliding groove (718), a fixed sleeve rod (76) is fixedly connected to one side of the fixed stopper (719) in the processing table (1), a sliding rod (77) is movably inserted at the other end of the fixed sleeve rod (76), and a fifth spring (714) is fixedly connected between one end of the sliding rod (77) and the fixed sleeve rod (76), a slot (75) is provided on the upper surface of the lower end of the second gear frame (72), and a square slot is provided in the second gear frame (72) at the lower side of the slot (75); The placement mechanism (6) comprises a hollow square frame (61) fixedly connected to one end of a transmission shaft (78), the hollow square frame (61) being placed on a processing table (1), a side wall of the hollow square frame (61) away from the transmission shaft (78) being provided with a placement groove (62), a sliding plate (63) being provided at the lower side of the placement groove (62) and being slidable up and down in the hollow square frame (61), a sliding block (64) being provided at one side of the sliding plate (63) and being slidable up and down in the hollow square frame (61), a second gear (65) being meshedly connected between the sliding block (64) and the sliding plate (63), and the second gear (65) being rotatably provided in the hollow square frame (61), and a second spring (66) being fixedly connected between the upper end of the sliding block (64) and the hollow square frame (61).

2. The clamping mechanism for processing a double-sided PCB according to claim 1, characterized in that: The protective mechanism (5) comprises a lifting bracket (52) slidably arranged on the upper surface of the bottom end of the processing table (1), trapezoidal rods (54) are slidably arranged at two opposite positions on the bottom side of the lifting bracket (52), a first spring (53) is fixedly connected between the bottom end of the lifting bracket (52) and the processing table (1), one side of the trapezoidal rod (54) is located inside the processing table (1) and is meshedly connected to a first gear (55), and the first gear (55) is rotatably arranged in the processing table (1), the top end of the first gear (55) is fixedly connected to a rotating rod (56) rotatably arranged in the processing table (1), the upper end of the rotating rod (56) extends to the upper side of the processing table (1), and the outer wall of the upper end of the rotating rod (56) is fixedly connected to a protective baffle (51).

3. The clamping mechanism for processing a double-sided PCB according to claim 1, characterized in that: A strip plate is provided at one end of the rotating block (74) extending outside the second gear rack (72).

4. The clamping mechanism for processing a double-sided PCB according to claim 1, characterized in that: A lifting block (715) is movably inserted into the upper side of the slot (75) at the bottom end of the first gear rack (71), a sixth spring (717) is fixedly connected between the upper end of the lifting block (715) and the first gear rack (71), a push block (716) is slidably arranged on one side of the lifting block (715) located in the first gear rack (71), and one end of the push block (716) is located outside the first gear rack (71).

5. The clamping mechanism for processing a double-sided PCB according to claim 4, characterized in that: A plurality of the sixth springs (717) are provided, and the plurality of the sixth springs (717) are arranged at equal intervals.

6. The clamping mechanism for processing a double-sided PCB according to claim 1, characterized in that: One end of the extrusion frame (712) located outside the second gear frame (72) is a conical structure.

7. The clamping mechanism for processing a double-sided PCB according to claim 2, characterized in that: One end of the trapezoidal rod (54) close to the first gear (55) is provided with a latching tooth.

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