A press fixture for a communication product before soldering

Abstract

The application relates to the technical field of circuit board pressing clamps, and discloses a pressing clamp for a circuit board before welding of a communication product, which comprises a base, a stand column fixedly installed at the top of the base, a pressing driving mechanism arranged on the stand column, two cross beams arranged on the pressing driving mechanism, a connecting beam fixedly installed on each side of the two cross beams close to each other, and an upper frame and a lower frame fixedly installed on the sides of the two connecting beams close to each other. The application has the following advantages and effects: the flexible circuit board adsorption disc can be precisely adjusted in two dimensions in the horizontal direction, so that the flexible circuit board can be conveniently and precisely aligned with the part of the printed circuit board that needs to be pressed, the pressing position before welding is accurate, the quality and reliability of the circuit board welding are effectively improved, the welding problem caused by the position deviation is reduced, and the pressing position can be flexibly adjusted for printed circuit boards and flexible circuit boards of different specifications.

Description

Technical Field

[0001] This application relates to the field of circuit board pressing fixtures, and in particular to a pressing fixture for use before soldering circuit boards in communication products. Background Technology

[0002] In the manufacturing process of modern communication products, circuit boards are core components, and their soldering quality directly affects product performance and reliability. With the rapid development of communication technologies towards 5G and the Internet of Things, the integration level of circuit boards is constantly increasing, and the combined application of flexible printed circuit boards (FPCs) and printed circuit boards (PCBs) is becoming increasingly common. Before soldering, a pressing fixture is used to precisely press the flexible circuit board to the designated position on the printed circuit board to ensure accurate solder joints and stable electrical connections.

[0003] In existing technologies, traditional pressing fixtures used before circuit board soldering still have at least the following shortcomings in practical use: First, most pressing fixtures rely on manual adjustment, which is cumbersome and time-consuming, and cannot flexibly adjust the pressing position according to different specifications of printed circuit boards and flexible circuit boards; Second, although some pressing fixtures have introduced mechanical structures such as lead screw drives, most can only achieve adjustment in one direction. When two-dimensional position adjustment is required in the horizontal direction, the operator needs to make adjustments twice, which is cumbersome and makes it difficult to ensure the coordination of the two adjustments, failing to meet the requirements of efficient, convenient and precise alignment of circuit boards.

[0004] Therefore, we propose a pressing fixture for use before soldering circuit boards in communication products to solve the above problems. Utility Model Content

[0005] The purpose of this application is to provide a pressing fixture for use before soldering circuit boards in communication products. It has the ability to achieve two-dimensional precise adjustment of the flexible circuit board adsorption plate in the horizontal direction, and can conveniently adjust the flexible circuit board to be precisely aligned with the part of the printed circuit board that needs to be pressed. It is also suitable for flexible adjustment of the pressing position of printed circuit boards and flexible circuit boards of different specifications.

[0006] The above-mentioned technical objective of this application is achieved through the following technical solution: a pressing fixture for welding circuit boards in communication products, comprising a base, a column fixedly mounted on the top of the base, a pressing drive mechanism mounted on the column, two crossbeams mounted on the pressing drive mechanism, connecting beams fixedly mounted on the sides of the two crossbeams that are close to each other, an upper frame and a lower frame fixedly mounted on the sides of the two connecting beams that are close to each other, an adjustment mechanism mounted on the upper frame, a flexible circuit board adsorption tray mounted on the adjustment mechanism, the adjustment mechanism being used to adjust the horizontal position of the flexible circuit board adsorption tray, a printed circuit board adsorption tray fixedly mounted on the top of the lower frame, both the flexible circuit board adsorption tray and the printed circuit board adsorption tray being hollow structures, the adjustment mechanism comprising a bearing, a lead screw, and a transverse slide. The system comprises: a motor, a bearing seat, a lead screw, a longitudinal slide, and a motor. The bearing seat is fixedly installed on the inner right side of the upper frame. The lead screw is rotatably installed on the bearing seat. The transverse slide is threaded onto the lead screw, and its bottom extends to the outside of the upper frame. The motor is fixedly installed on the outer left side of the upper frame. The output shaft of the motor is fixedly connected to the left end of the lead screw. A longitudinal groove is provided at the bottom of the transverse slide. The bearing seat is fixedly installed on the inner rear side of the longitudinal groove. The lead screw is rotatably installed on the bearing seat. The longitudinal slide is threaded onto the lead screw, and its bottom extends to the outside of the longitudinal groove. A flexible circuit board adsorption plate is fixedly installed at the bottom of the longitudinal slide. The motor is fixedly installed on the outer front side of the transverse slide. The output shaft of the motor is fixedly connected to the front end of the lead screw.

[0007] A further feature of this application is that two horizontal guide rods are fixedly installed inside the upper frame, and a transverse slide is slidably sleeved on the two horizontal guide rods.

[0008] A further feature of this application is that the cross-sections of the longitudinal slide groove and the longitudinal slide block are both rectangular, and the left and right sides of the longitudinal slide block slide in contact with the inner walls of the left and right sides of the longitudinal slide groove, respectively.

[0009] A further feature of this application is that: the bottom surface of the flexible circuit board adsorption tray and the top surface of the printed circuit board adsorption tray are both provided with a plurality of uniformly distributed adsorption holes; a vacuum pump is fixedly installed on the top of the flexible circuit board adsorption tray and the bottom of the printed circuit board adsorption tray; an air extraction pipe is fixedly installed on the suction end of each of the two vacuum pumps; and one end of each air extraction pipe extends into the flexible circuit board adsorption tray and the printed circuit board adsorption tray, respectively.

[0010] A further feature of this application is that a one-way valve is fixedly installed on both extraction pipes.

[0011] A further provision of this application is that a vacuum breaking tube is fixedly installed on the top of the flexible circuit board adsorption tray and the bottom of the printed circuit board adsorption tray, and a solenoid valve is fixedly installed on each of the two vacuum breaking tubes.

[0012] A further configuration of this application is as follows: the pressing drive mechanism includes a drive shaft, a gear, two lifting plates, two racks, and a motor. A vertical slot is provided on the left side of the column. The drive shaft is rotatably installed in the vertical slot. The gear is fixedly mounted on the drive shaft. The two lifting plates are slidably installed in the vertical slot and distributed on the left and right sides of the gear. The two racks are respectively fixedly installed on the side of the two lifting plates that are close to each other. Both racks are meshed with each other. The right ends of the two crossbeams are respectively fixedly connected to the left side wall of the corresponding lifting plate. The motor is fixedly installed on the front outer wall of the column. The output shaft end of the motor is fixedly connected to the front end of the drive shaft.

[0013] A further feature of this application is that an L-shaped guide plate is fixedly installed on the left side of the column, and both crossbeams are slidably mounted on the L-shaped guide plate.

[0014] A further feature of this application is that two limiting blocks are fixedly installed on the left side wall of the L-shaped guide plate, and two crossbeams are located between the two limiting blocks. The sides of the two crossbeams that are far apart from each other abut against the sides of the two limiting blocks that are close to each other.

[0015] This application includes at least one of the following beneficial technical effects:

[0016] 1. This application utilizes an adjustment mechanism to achieve two-dimensional precise adjustment of the flexible circuit board adsorption plate in the horizontal direction, thereby conveniently adjusting the flexible circuit board to precisely align with the part of the printed circuit board that needs to be pressed, ensuring accurate pressing position before welding, effectively improving the quality and reliability of circuit board welding, reducing welding defects caused by position deviation, and is suitable for flexible adjustment of pressing position for printed circuit boards and flexible circuit boards of different specifications.

[0017] 2. This application utilizes a pressing drive mechanism to control the relative lifting and lowering motion of the upper and lower frames, enabling the upper and lower frames to perform stable pressing actions. Compared with the traditional single-drive pressing method, this synchronous pressing design can ensure that pressure is applied evenly to the flexible circuit board and the printed circuit board, avoiding uneven local pressure from affecting the welding effect and effectively improving the production quality of the circuit board. Attached Figure Description

[0018] Figure 1 This is a front-view stereoscopic structural diagram of this embodiment.

[0019] Figure 2 This is a top-view three-dimensional structural diagram of the upper frame and adjustment mechanism.

[0020] Figure 3 This is a schematic diagram of the front cross-sectional structure of the flexible circuit board adsorption plate.

[0021] Figure 4This is a top-down 3D structural diagram of the lower frame.

[0022] Figure 5 This is a schematic diagram of the front cross-sectional structure of this embodiment.

[0023] In the diagram: 1. Base; 2. Column; 3. Crossbeam; 4. Connecting beam; 5. Upper frame; 6. Lower frame; 7. Adjustment mechanism; 71. Shaft seat one; 72. Lead screw one; 73. Transverse slide; 74. Motor one; 75. Longitudinal slide; 76. Shaft seat two; 77. Lead screw two; 78. Longitudinal slide; 79. Motor two; 710. Horizontal guide rod; 8. Flexible circuit board adsorption plate; 9. Printed circuit board adsorption plate; 10. Adsorption hole; 11. Vacuum pump; 12. Evacuation pipe; 13. One-way valve; 14. Vacuum breaking pipe; 15. Solenoid valve; 16. Vertical groove; 17. Drive shaft; 18. Gear; 19. Lifting plate; 20. Rack; 21. Motor three; 22. L-shaped guide plate; 23. Limit block. Detailed Implementation

[0024] The technical solution of this application will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] See Figures 1-5This application provides a pressing fixture for use before soldering circuit boards in communication products, including a base 1, a column 2 fixedly mounted on the top of the base 1, a pressing drive mechanism on the column 2, two crossbeams 3 on the pressing drive mechanism, a connecting beam 4 fixedly mounted on the side of each of the two crossbeams 3 that is close to each other, an upper frame 5 and a lower frame 6 fixedly mounted on the side of each of the two connecting beams 4 that is close to each other, an adjustment mechanism 7 on the upper frame 5, a flexible circuit board adsorption tray 8 on the adjustment mechanism 7, the adjustment mechanism 7 being used to adjust the horizontal position of the flexible circuit board adsorption tray 8, and a printed circuit board adsorption tray 9 fixedly mounted on the top of the lower frame 6. Both the flexible circuit board adsorption tray 8 and the printed circuit board adsorption tray 9 are hollow structures, and the bottom surface of the flexible circuit board adsorption tray 8 and the printed circuit board adsorption tray 9 are connected. The top surface of the auxiliary plate 9 is provided with multiple evenly distributed adsorption holes 10. Vacuum pumps 11 are fixedly installed on the top of the flexible circuit board adsorption plate 8 and the bottom of the printed circuit board adsorption plate 9. The suction ends of the two vacuum pumps 11 are fixedly installed with suction pipes 12. One end of the two suction pipes 12 extends into the flexible circuit board adsorption plate 8 and the printed circuit board adsorption plate 9, respectively. One-way valves 13 are fixedly installed on the two suction pipes 12. The flexible circuit board adsorption plate 8 and the printed circuit board adsorption plate 9 adopt a hollow structure design. With the synergistic effect of the vacuum pumps 11, adsorption holes 10, suction pipes 12 and one-way valves 13, the flexible circuit board and the printed circuit board can be stably adsorbed, preventing the circuit board from shifting or sliding during the pressing and welding process, and ensuring the stability and consistency of the pressing and welding process.

[0026] In this embodiment, the adjusting mechanism 7 includes a first bearing seat 71, a first lead screw 72, a transverse slide 73, a first motor 74, a second bearing seat 76, a second lead screw 77, a longitudinal slide 78, and a second motor 79. The first bearing seat 71 is fixedly installed on the inner right side wall of the upper frame 5. The first lead screw 72 is rotatably installed on the first bearing seat 71. The transverse slide 73 is threaded onto the first lead screw 72, and the bottom of the transverse slide 73 extends outside the upper frame 5. The first motor 74 is fixedly installed on the left side of the upper frame 5. On the outer wall, the output shaft end of motor 74 is fixedly connected to the left end of lead screw 72. A longitudinal groove 75 is provided at the bottom of the transverse slide 73. Shaft seat 76 is fixedly installed on the rear inner wall of the longitudinal groove 75. Lead screw 77 is rotatably mounted on shaft seat 76. A longitudinal slide 78 is threaded onto lead screw 77. The bottom of the longitudinal slide 78 extends outside the longitudinal groove 75. A flexible circuit board adsorption plate 8 is fixedly installed at the bottom of the longitudinal slide 78. Motor 79... Fixedly installed on the front outer wall of the transverse slide 73, the output shaft of motor 79 is fixedly connected to the front end of lead screw 77. Motor 74 controls lead screw 72 to rotate, causing the transverse slide 73 to move horizontally in the left and right directions, thereby adjusting the position of the flexible circuit board adsorption tray 8 in the left and right directions. Motor 79 controls lead screw 77 to rotate, causing the longitudinal slide 78 to move horizontally in the front and back directions, thereby adjusting the position of the flexible circuit board adsorption tray 8 in the front and back directions. This enables two-dimensional precise adjustment of the flexible circuit board adsorption tray 8 in the horizontal direction. The position of the flexible circuit board can be flexibly adjusted according to the specific position of the printed circuit board, so that the two are precisely aligned, ensuring accurate pressing position before welding. This effectively improves the quality and reliability of circuit board welding, reduces welding defects caused by position deviation, and is suitable for flexible adjustment of the pressing position of printed circuit boards and flexible circuit boards of different specifications.

[0027] In this embodiment, two horizontal guide rods 710 are fixedly installed inside the upper frame 5. The horizontal slide block 73 is slidably sleeved on the two horizontal guide rods 710. The cross-sections of the longitudinal slide groove 75 and the longitudinal slide block 78 are both rectangular. The left and right sides of the longitudinal slide block 78 slide in contact with the inner walls of the left and right sides of the longitudinal slide groove 75, respectively. The design of the horizontal guide rods 710 and the rectangular cross-section sliding contact design of the longitudinal slide groove and the longitudinal slide block can provide stable guidance for the adjustment mechanism 7 and reduce shaking and offset during the adjustment process.

[0028] In this embodiment, vacuum breaking tubes 14 are fixedly installed on the top of the flexible circuit board adsorption tray 8 and the bottom of the printed circuit board adsorption tray 9. Solenoid valves 15 are fixedly installed on both vacuum breaking tubes 14. The design of the vacuum breaking tubes 14 and the solenoid valves 15 can quickly break the vacuum in the flexible circuit board adsorption tray 8 and the printed circuit board adsorption tray 9 after the welding is completed, so as to conveniently and quickly remove the welded circuit board and improve work efficiency.

[0029] In this embodiment, the pressing drive mechanism includes a drive shaft 17, a gear 18, two lifting plates 19, two racks 20, and a motor 21. A vertical slot 16 is provided on the left side of the column 2. The drive shaft 17 is rotatably mounted in the vertical slot 16. The gear 18 is fixedly mounted on the drive shaft 17. The two lifting plates 19 are slidably mounted in the vertical slot 16 and distributed on the left and right sides of the gear 18. The two racks 20 are respectively fixedly mounted on the sides of the two lifting plates 19 that are close to each other, and both racks 20 mesh with each other. The right ends of the two crossbeams 3 are respectively fixedly connected to the left side wall of the corresponding lifting plate 19. The motor 21 is fixedly mounted on the column 2. On the front outer wall of column 2, the output shaft end of motor 3 21 is fixedly connected to the front end of drive shaft 17. Motor 3 21 can drive drive shaft 17 and gear 18 to rotate. By using gear 18 and two racks 20 to mesh, two lifting plates 19 can be lifted and lowered simultaneously, and the lifting directions of the two lifting plates 19 are opposite, thereby driving the upper frame 5 and lower frame 6 to perform a stable pressing action. Compared with the traditional single-drive pressing method, this synchronous pressing design can ensure that the pressure is applied evenly to the flexible circuit board and printed circuit board, avoid uneven local pressure affecting the welding effect, and effectively improve the production quality of the circuit board.

[0030] In this embodiment, an L-shaped guide plate 22 is fixedly installed on the left side of the column 2, and both crossbeams 3 are slidably mounted on the L-shaped guide plate 22. The design of the L-shaped guide plate 22 serves to guide the movement of the two crossbeams 3, ensuring the stability of the lifting process of the two crossbeams 3 and the two lifting plates 19, preventing them from tilting or misaligning, and enhancing the structural stability and reliability of the entire fixture during operation.

[0031] In this embodiment, two limiting blocks 23 are fixedly installed on the left side wall of the L-shaped guide plate 22. The two crossbeams 3 are located between the two limiting blocks 23. The sides of the two crossbeams 3 that are far apart from each other abut against the sides of the two limiting blocks 23 that are close to each other. The design of the two limiting blocks 23 can limit the maximum distance between the two crossbeams 3.

[0032] In this embodiment, it should be noted that motor 74, motor 79, and motor 21 are all reversible motors. A controller is installed on the front outer wall of the column 2. The controller is equipped with multiple control buttons. Motor 74, motor 79, motor 21, two vacuum pumps 11, and two solenoid valves 15 are all electrically connected to the controller. The multiple control buttons are used to control the operation of motor 74, motor 79, motor 21, two vacuum pumps 11, and two solenoid valves 15 respectively. The wiring connection method and control method are mature technologies in this field and have been fully disclosed. Therefore, they will not be described in detail here.

[0033] With the above structure, the working principle of the pressing fixture for pre-soldering circuit boards in communication products provided in this application is as follows:

[0034] The flexible circuit board is attached to the lower surface of the flexible circuit board adsorption plate 8, covering the multiple adsorption holes 10 provided thereon. The printed circuit board is attached to the lower surface of the printed circuit board adsorption plate 9, covering the multiple adsorption holes 10 provided thereon. The operator controls the operation of two vacuum pumps 11. When the vacuum pumps 11 are working, the air inside the flexible circuit board adsorption plate 8 and the printed circuit board adsorption plate 9 is extracted through two air extraction pipes 12 respectively. A negative pressure is formed inside the flexible circuit board adsorption plate 8 and the printed circuit board adsorption plate 9, which can tightly adsorb and fix the flexible circuit board and the printed circuit board onto the flexible circuit board adsorption plate 8 and the printed circuit board adsorption plate 9 respectively.

[0035] After the flexible circuit board and the printed circuit board are respectively adsorbed and fixed, the horizontal position of the flexible circuit board can be adjusted according to the required pressing position of the printed circuit board and the flexible circuit board. If the position adjustment in the left and right direction is required, the motor 74 is controlled to run. The output shaft of the motor 74 drives the lead screw 72 to rotate. Since the transverse slide 73 is threaded on the lead screw 72, under the rotation of the lead screw 72, the transverse slide 73 moves horizontally in the left and right direction along the lead screw 72. This allows the flexible circuit board adsorption plate 8 and the flexible circuit board adsorbed and fixed on its lower surface to follow the left and right position adjustment. The position adjustment in the front and back direction controls the operation of motor 2 79. The output shaft of motor 2 79 drives lead screw 2 77 to rotate. Since the longitudinal slide 78 is threaded on lead screw 2 77, the longitudinal slide 78 moves horizontally along lead screw 2 77 in the front and back direction, which allows the flexible circuit board adsorption plate 8 and the flexible circuit board adsorbed and fixed on its lower surface to follow the position adjustment in the front and back direction. In addition, through the coordinated control of motor 1 74 and motor 2 79, the flexible circuit board adsorption plate 8 can be precisely adjusted in two dimensions in the horizontal direction, so that the flexible circuit board can be conveniently adjusted to be precisely aligned with the part of the printed circuit board that needs to be pressed.

[0036] After the pressing positions of the flexible circuit board and the printed circuit board are adjusted, the motor 21 is controlled to rotate forward. The output shaft of the motor 21 drives the drive shaft 17 and the gear 18 to rotate. Under the meshing transmission action of the two racks 20 and the gear 18, the two lifting plates 19 can be controlled to rise and fall simultaneously. The two lifting plates 19 rise and fall in opposite directions, so that the upper lifting plate 19 moves vertically downward and the lower lifting plate 19 moves vertically upward. The two crossbeams 3 move closer to each other, thereby driving the flexible circuit board adsorption plate 8 and the printed circuit board adsorption plate 9 to move closer to each other, realizing a stable pressing action. The pressing force can be applied evenly to press and fix the flexible circuit board and the printed circuit board together stably.

[0037] After pressing is completed, subsequent welding operations can be performed. Once the welding operation is completed, the solenoid valves 15 on the two vacuum breaking tubes 14 are opened, and external air quickly enters the flexible circuit board adsorption plate 8 and the printed circuit board adsorption plate 9 through the two vacuum breaking tubes 14. The adsorption force disappears, thus releasing the adsorption fixation on the welded flexible circuit board and printed circuit board. Then, the motor 3 21 is controlled to reverse, causing the upper lifting plate 19 to move vertically upward and the lower lifting plate 19 to move vertically downward. The two crossbeams 3 move away from each other, allowing the operator to easily and quickly remove the welded circuit board.

Claims

1. A pressing fixture for use before soldering circuit boards in communication products, characterized in that, Includes a base (1), on which a column (2) is fixedly installed. A pressing drive mechanism is provided on the column (2), and two crossbeams (3) are provided on the pressing drive mechanism. A connecting beam (4) is fixedly installed on the side of the two crossbeams (3) that are close to each other. An upper frame (5) and a lower frame (6) are fixedly installed on the side of the two connecting beams (4) that are close to each other, respectively. An adjustment mechanism (7) is provided on the upper frame (5), and a flexible circuit board adsorption plate (8) is provided on the adjustment mechanism (7). The adjustment mechanism (7) is used to adjust the horizontal position of the flexible circuit board adsorption tray (8). The lower frame (6) is fixedly installed with a printed circuit board adsorption tray (9). Both the flexible circuit board adsorption tray (8) and the printed circuit board adsorption tray (9) are hollow structures. The adjustment mechanism (7) includes a first bearing seat (71), a first lead screw (72), a transverse slide (73), a first motor (74), a second bearing seat (76), a second lead screw (77), a longitudinal slide (78), and a second motor (79). The first bearing seat (71) is fixedly installed on the upper frame (5). On the right inner wall, the lead screw (72) is rotatably mounted on the bearing seat (71), and the transverse slide (73) is threaded onto the lead screw (72). The bottom of the transverse slide (73) extends to the outside of the upper frame (5). The motor (74) is fixedly mounted on the left outer wall of the upper frame (5). The output shaft end of the motor (74) is fixedly connected to the left end of the lead screw (72). The bottom of the transverse slide (73) is provided with a longitudinal groove (75). The bearing seat (76) is fixedly mounted on the longitudinal groove. On the rear inner wall of the slide groove (75), the second lead screw (77) is rotatably mounted on the second shaft seat (76), the longitudinal slide seat (78) is threaded onto the second lead screw (77), the bottom of the longitudinal slide seat (78) extends to the outside of the longitudinal slide groove (75), the flexible circuit board adsorption plate (8) is fixedly mounted on the bottom of the longitudinal slide seat (78), the second motor (79) is fixedly mounted on the front outer wall of the transverse slide seat (73), and the output shaft end of the second motor (79) is fixedly connected to the front end of the second lead screw (77).

2. The pressing fixture for circuit board welding of communication products according to claim 1, characterized in that: Two horizontal guide rods (710) are fixedly installed inside the upper frame (5), and the horizontal slide (73) is slidably sleeved on the two horizontal guide rods (710).

3. The pressing fixture for circuit board welding of communication products according to claim 1, characterized in that: The longitudinal groove (75) and the longitudinal slide block (78) are both rectangular in cross-section, and the left and right sides of the longitudinal slide block (78) slide in contact with the inner walls of the left and right sides of the longitudinal groove (75), respectively.

4. The pressing fixture for circuit board welding of communication products according to claim 1, characterized in that: The bottom surface of the flexible circuit board adsorption tray (8) and the top surface of the printed circuit board adsorption tray (9) are provided with a plurality of uniformly distributed adsorption holes (10). Vacuum pumps (11) are fixedly installed on the top of the flexible circuit board adsorption tray (8) and the bottom of the printed circuit board adsorption tray (9). The suction ends of the two vacuum pumps (11) are fixedly installed with suction pipes (12). One end of the two suction pipes (12) extends into the flexible circuit board adsorption tray (8) and the printed circuit board adsorption tray (9), respectively.

5. The pressing fixture for pre-soldering circuit boards of communication products according to claim 4, characterized in that: One-way valves (13) are fixedly installed on both of the aforementioned air extraction pipes (12).

6. The pressing fixture for circuit board welding of communication products according to claim 4, characterized in that: Vacuum breaking tubes (14) are fixedly installed on the top of the flexible circuit board adsorption plate (8) and the bottom of the printed circuit board adsorption plate (9), and solenoid valves (15) are fixedly installed on both vacuum breaking tubes (14).

7. The pressing fixture for pre-soldering circuit boards of communication products according to claim 1, characterized in that: The pressing drive mechanism includes a drive shaft (17), a gear (18), two lifting plates (19), two racks (20), and a motor (21). A vertical groove (16) is provided on the left side of the column (2). The drive shaft (17) is rotatably installed in the vertical groove (16). The gear (18) is fixedly mounted on the drive shaft (17). The two lifting plates (19) are slidably installed in the vertical groove (16) and distributed on the left and right sides of the gear (18). The two racks (20) are respectively fixedly installed on the side of the two lifting plates (19) that are close to each other. The two racks (20) are meshed with each other. The right ends of the two crossbeams (3) are respectively fixedly connected to the left side wall of the corresponding lifting plate (19). The motor (21) is fixedly installed on the front outer wall of the column (2). The output shaft end of the motor (21) is fixedly connected to the front end of the drive shaft (17).

8. The pressing fixture for pre-soldering circuit boards of communication products according to claim 7, characterized in that: An L-shaped guide plate (22) is fixedly installed on the left side of the column (2), and both crossbeams (3) are slidably mounted on the L-shaped guide plate (22).

9. The pressing fixture for pre-soldering circuit boards of communication products according to claim 8, characterized in that: Two limiting blocks (23) are fixedly installed on the left side wall of the L-shaped guide plate (22). The two crossbeams (3) are located between the two limiting blocks (23). The sides of the two crossbeams (3) that are far apart from each other abut against the sides of the two limiting blocks (23) that are close to each other.

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