SMT (Surface Mount Technology) stepped steel mesh for positioning PCB (Printed Circuit Board)

Abstract

The utility model discloses an SMT stepped steel mesh for positioning a PCB, which comprises a bottom plate, the PCB is placed in a fixed placing seat and a movable placing seat from a taking groove at one side of a mounting frame, and a screw rod is driven to rotate through a knob in a fixing assembly, so that the movable placing seat moves towards the fixed placing seat under the matching of a sliding block and a sliding groove; the PCB is clamped and fixed through the cooperation of the movable placement seat and the fixed placement seat, and the PCB has the advantage of being convenient to disassemble and assemble; piston rods of electric hydraulic rods in the two sets of downward pressing assemblies synchronously drive pressing plates to descend, the two sets of pressing plates abut against each other to drive the SMT step type steel mesh in the containing frame to descend towards the surface of the PCB, the bottom of the SMT step type steel mesh is attached to the surface of the PCB, then the PCB is printed through the SMT step type steel mesh, after the PCB is printed, the electric hydraulic rods drive the pressing plates to ascend, and the pressing plates abut against the surface of the PCB. And the placing frame ascends under the action of the springs in the mounting grooves in the inner walls of the two sides of the mounting frame, so that the printing efficiency of the PCB can be improved to a certain extent.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing equipment, in particular to an SMT stepped steel mesh for positioning a PCB. Background Art

[0002] Steel mesh, also known as SMT template, is a special mold for SMT. Its main function is to help the deposition of solder paste. The purpose is to transfer the exact amount of solder paste to the exact position on the empty PCB, so as to fix the PCB board during printing.

[0003] For example, a SMT stepped steel mesh for positioning a PCB (Announcement No.: CN220493249U), includes a steel mesh body and a mounting frame fixedly mounted on the periphery of the steel mesh body, two sets of fixing plates are arranged at the bottom end of the steel mesh body, a printing port is opened on the surface of the steel mesh body, and a clamping mechanism is arranged at each of the fixing plates, the clamping mechanism includes a clamping plate arranged at the bottom end of the steel mesh body, the clamping plate has the function of clamping the PCB board, and an adjusting screw is arranged at the top end of the clamping plate, the adjusting screw has the function of adjusting the clamping plate. The SMT stepped steel mesh for positioning a PCB, by rotating the rotating block, will drive the adjusting screw to rotate inside the mounting block, while rotating, and push the clamping plate at the bottom to move downward, so that the clamping plates on both sides can clamp the two sides of the PCB board, and can make the surface of the PCB board and the lower surface of the steel mesh body fit closely, thereby improving the printing quality of the PCB board.

[0004] Based on the search of the above patents and in combination with the equipment in the prior art, it is found that the above equipment needs to use a servo motor to drive the bidirectional screw to rotate when in use, so that the two sets of drive blocks on the bidirectional screw are close to each other, so that the two sets of fixed plates clamp the PCB board, and then by rotating the two sets of rotating blocks in sequence, the clamping plate at the bottom of the screw is adjusted to move downward, so that the clamping plate presses the PCB board, so that the surface of the PCB board is tightly fitted with the lower surface of the steel mesh body. Therefore, the device has the problem of complicated and cumbersome disassembly and assembly of the PCB board, which affects the printing efficiency of the PCB board. Therefore, we need to propose an SMT stepped steel mesh for positioning the PCB. Utility Model Content

[0005] The purpose of the utility model is to provide an SMT stepped steel mesh for positioning a PCB, which has the advantages of convenient disassembly and assembly of the PCB board, and can improve the printing efficiency of the PCB board to a certain extent, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A SMT stepped steel mesh for positioning a PCB comprises a bottom plate, a mounting frame is fixedly mounted on the surface of the bottom plate, a taking groove for easy taking is provided on one side of the mounting frame, a PCB board is arranged inside the mounting frame, and a fixing component for clamping and fixing the PCB board is arranged on the bottom plate, a placement frame is slidably arranged above the PCB board, an SMT stepped steel mesh is placed inside the placement frame, and pressing components for pressing the SMT stepped steel mesh down to fit the PCB board are arranged on both side inner walls of the mounting frame.

[0008] Preferably, the fixing assembly includes a fixed placement seat, which is fixedly installed on the surface of the base plate, and a movable placement seat is slidably installed on the base plate directly in front of the fixed placement seat. The movable placement seat is arranged corresponding to the fixed placement seat, and the PCB board is detachably installed inside the movable placement seat and the fixed placement seat.

[0009] Preferably, a screw is rotatably mounted on one side of the movable placement seat via a bearing, and one end of the screw passes through the mounting frame and is fixedly connected to a knob.

[0010] Preferably, the bottom plate is located at the bottom of the movable placement seat and is symmetrically provided with two groups of slide grooves, the insides of the two groups of slide grooves are slidably connected with sliders, and the tops of the two groups of sliders are fixedly connected to the bottom of the movable placement seat.

[0011] Preferably, the installation frame is symmetrically provided with four groups of installation grooves at both ends of the placement frame, springs are fixedly installed inside the four groups of installation grooves, a connecting plate is fixedly connected to the top of the spring, and one side of the four groups of connecting plates is respectively fixedly connected to the two ends of the placement frame.

[0012] Preferably, the pressing assembly includes a fixing plate, which is fixedly mounted on an inner wall of one side of the mounting frame, an electric hydraulic rod is fixedly mounted on the top of the fixing plate, one end of the piston rod of the electric hydraulic rod passes through the fixing plate and is fixedly connected to a pressure plate, and the pressure plate is located above the SMT stepped steel mesh.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] 1. The utility model places the PCB board from the groove on one side of the installation frame into the fixed placement seat and the movable placement seat, and drives the screw rod to rotate through the knob in the fixed assembly, so that the movable placement seat moves toward the fixed placement seat under the cooperation of the slider and the slide groove, and the PCB board is clamped and fixed by the cooperation of the movable placement seat and the fixed placement seat, so that the PCB board has the advantage of convenient disassembly and assembly;

[0015] 2. By placing the SMT stepped steel mesh into the placement frame, the electric hydraulic rod piston rods in the two sets of pressing components synchronously drive the pressure plate to descend, and the two sets of pressure plates contact and drive the SMT stepped steel mesh in the placement frame to descend toward the surface of the PCB board, so that the bottom of the SMT stepped steel mesh fits the surface of the PCB board, thereby facilitating the printing of the PCB board through the SMT stepped steel mesh. After the PCB board is printed, the electric hydraulic rod drives the pressure plate to rise, and the placement frame rises under the action of the springs in the mounting grooves on the inner walls of the mounting frame on both sides, which can improve the printing efficiency of the PCB board to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model from the side;

[0017] Figure 2 It is a schematic diagram of the structure of the utility model in cross section;

[0018] Figure 3 This is a schematic diagram of the structure of the placement frame and the SMT stepped steel mesh of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the base plate and the fixing assembly of the utility model.

[0020] In the figure: 1. Base plate; 2. Mounting frame; 3. Pick-up slot; 4. PCB board; 5. Fixing assembly; 51. Fixed placement seat; 52. Movable placement seat; 53. Screw; 54. Knob; 6. Placement frame; 7. SMT stepped steel mesh; 8. Pressing assembly; 81. Fixing plate; 82. Electric hydraulic rod; 83. Pressing plate; 9. Mounting slot; 10. Spring; 11. Connecting plate; 12. Slide slot; 13. Slider. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-4 , the utility model provides a technical solution:

[0023] A SMT stepped steel mesh for positioning a PCB comprises a base plate 1, a mounting frame 2 is fixedly mounted on the surface of the base plate 1, a taking slot 3 for easy taking is provided on one side of the mounting frame 2, a PCB board 4 is arranged inside the mounting frame 2, and a fixing component 5 for clamping and fixing the PCB board 4 is arranged on the base plate 1, a placement frame 6 is slidably arranged above the mounting frame 2, an SMT stepped steel mesh 7 is placed inside the placement frame 6, and pressing components 8 for pressing the SMT stepped steel mesh 7 down to fit the PCB board 4 are arranged on the inner walls on both sides of the mounting frame 2.

[0024] The fixing assembly 5 includes a fixed placement seat 51, which is fixedly installed on the surface of the base plate 1. A movable placement seat 52 is slidably installed on the base plate 1 directly in front of the fixed placement seat 51. The movable placement seat 52 is correspondingly arranged to the fixed placement seat 51. The PCB board 4 is detachably installed inside the movable placement seat 52 and the fixed placement seat 51. The openings of the movable placement seat 52 and the fixed placement seat 51 face the taking slot 3, which is convenient for disassembling and assembling the PCB board 4 from the taking slot 3.

[0025] A screw rod 53 is rotatably mounted on one side of the movable placement seat 52 through a bearing, and one end of the screw rod 53 passes through the installation frame 2 and is fixedly connected to a knob 54, so that the screw rod 53 can be driven to rotate by the knob 54 to move the movable placement seat 52 toward the fixed placement seat 51.

[0026] The bottom of the base plate 1 is located at the bottom of the movable placement seat 52 and is symmetrically provided with two groups of slide grooves 12. The inside of the two groups of slide grooves 12 are slidably connected with sliders 13. The tops of the two groups of sliders 13 are fixedly connected to the bottom of the movable placement seat 52, so that the movable placement seat 52 can only move in a straight line under the cooperation of the sliders 13 and the slide grooves 12.

[0027] The mounting frame 2 is symmetrically provided with four groups of mounting grooves 9 at both ends of the placement frame 6, and springs 10 are fixedly installed inside the four groups of mounting grooves 9. A connecting plate 11 is fixedly connected to the top of the spring 10, and one side of the four groups of connecting plates 11 is respectively fixedly connected to the two ends of the placement frame 6, so that the spring 10 and the connecting plate 11 cooperate to make the pressing component 8 break away from the resistance to the SMT stepped steel mesh 7 on the placement frame 6, and the placement frame 6 can rise under the action of the spring 10.

[0028] The pressing assembly 8 includes a fixing plate 81, which is fixedly mounted on an inner wall of one side of the mounting frame 2. An electric hydraulic rod 82 is fixedly mounted on the top of the fixing plate 81. One end of the piston rod of the electric hydraulic rod 82 passes through the fixing plate 81 and is fixedly connected to a pressing plate 83. The pressing plate 83 is located above the SMT stepped steel mesh 7, so that the piston rods of the electric hydraulic rods 82 in the two sets of pressing assemblies 8 can synchronously drive the pressing plate 83 to descend. The two sets of pressing plates 83 contact and drive the SMT stepped steel mesh 7 in the placement frame 6 to descend toward the surface of the PCB board 4, so that the bottom of the SMT stepped steel mesh 7 fits the surface of the PCB board 4, thereby facilitating printing on the PCB board 4 through the SMT stepped steel mesh 7.

[0029] Working principle: When the utility model is used, the PCB board 4 is placed in the fixed placement seat 51 and the movable placement seat 52 by taking the slot 3 from one side of the installation frame 2, and the screw 53 is driven to rotate by the knob 54 in the fixed component 5, so that the movable placement seat 52 moves toward the fixed placement seat 51 under the cooperation of the slider 13 and the slide slot 12, and the PCB board 4 is clamped and fixed by the cooperation of the movable placement seat 52 and the fixed placement seat 51. After the SMT stepped steel mesh 7 is placed in the placement frame 6, the piston rod of the electric hydraulic rod 82 in the two sets of pressing components 8 is pressed. The pressing plate 83 is driven to descend synchronously, and the SMT stepped steel mesh 7 in the placement frame 6 is driven to descend toward the surface of the PCB board 4 through the resistance of the two groups of pressing plates 83, so that the bottom of the SMT stepped steel mesh 7 fits the surface of the PCB board 4, thereby facilitating the printing of the PCB board 4 through the SMT stepped steel mesh 7. After the PCB board 4 is printed, the electric hydraulic rod 82 drives the pressing plate 83 to rise, and the placement frame 6 rises under the action of the springs 10 in the mounting grooves 9 on the inner walls of the mounting frame 2 on both sides. The PCB board 4 has the advantage of convenient disassembly and assembly, and can improve the printing efficiency of the PCB board 4 to a certain extent.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A SMT stepped steel mesh for positioning a PCB, comprising a bottom plate (1), characterized in that: A mounting frame (2) is fixedly mounted on the surface of the base plate (1); a take-up slot (3) is provided on one side of the mounting frame (2) for easy taking; a PCB board (4) is arranged inside the mounting frame (2); and a fixing component (5) for clamping and fixing the PCB board (4) is arranged on the base plate (1); a placement frame (6) is slidably arranged above the PCB board (4) on the mounting frame (2); an SMT stepped steel mesh (7) is placed inside the placement frame (6); and pressing components (8) for pressing the SMT stepped steel mesh (7) down to fit the PCB board (4) are arranged on both inner walls of the mounting frame (2).

2. The SMT stepped steel mesh for PCB positioning according to claim 1, characterized in that: The fixing assembly (5) comprises a fixed placement seat (51), the fixed placement seat (51) is fixedly mounted on the surface of the base plate (1), a movable placement seat (52) is slidably mounted on the base plate (1) directly in front of the fixed placement seat (51), the movable placement seat (52) is arranged corresponding to the fixed placement seat (51), and the PCB board (4) is detachably mounted inside the movable placement seat (52) and the fixed placement seat (51).

3. The SMT stepped steel mesh for PCB positioning according to claim 2, characterized in that: A screw rod (53) is rotatably mounted on one side of the movable placement seat (52) via a bearing, and one end of the screw rod (53) passes through the mounting frame (2) and is fixedly connected to a knob (54).

4. The SMT stepped steel mesh for PCB positioning according to claim 3, characterized in that: The bottom plate (1) is located at the bottom of the movable placement seat (52) and is symmetrically provided with two groups of sliding grooves (12). The insides of the two groups of sliding grooves (12) are slidably connected with sliders (13), and the tops of the two groups of sliders (13) are fixedly connected to the bottom of the movable placement seat (52).

5. The SMT stepped steel mesh for PCB positioning according to claim 1, characterized in that: The installation frame (2) is symmetrically provided with four groups of installation grooves (9) at both ends of the placement frame (6), and springs (10) are fixedly installed inside the four groups of installation grooves (9). The top of the spring (10) is fixedly connected with a connecting plate (11), and one side of the four groups of connecting plates (11) is fixedly connected to the two ends of the placement frame (6) respectively.

6. The SMT stepped steel mesh for PCB positioning according to claim 1, characterized in that: The pressing assembly (8) comprises a fixing plate (81), wherein the fixing plate (81) is fixedly mounted on an inner wall of one side of the mounting frame (2), an electric hydraulic rod (82) is fixedly mounted on the top of the fixing plate (81), one end of the piston rod of the electric hydraulic rod (82) passes through the fixing plate (81) and is fixedly connected to a pressing plate (83), wherein the pressing plate (83) is located above the SMT stepped steel mesh (7).

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