SMT mounting positioning stepped steel mesh

Abstract

The utility model discloses an SMT mounting positioning stepped steel mesh, comprising a steel mesh body, the inner walls of the two sides of the steel mesh body are provided with chutes, the chutes are internally and movably connected with two slide bars, detachable fixing assemblies are arranged between the two ends of the slide bars and the steel mesh body, one side of each slide bar is provided with a spacing groove, and the spacing grooves are arranged in the spacing grooves. A sliding block is movably connected into the limiting groove, a connecting plate is fixedly connected to the top of the sliding block, a plug pin is inserted into the connecting plate, a plurality of circular grooves are formed in the top of the sliding rod, the plug pin is connected with the circular grooves in an inserted mode, a lead screw is movably connected to one end of the connecting plate, and a clamping plate is fixedly connected to the bottom end of the lead screw. According to the PCB positioning device, PCBs can be stably positioned, the phenomenon that the printing quality is reduced due to the fact that the PCBs are prone to shaking in the printing process is avoided, meanwhile, the PCBs of different sizes can be positioned through the device, and the sliding rod can stably move through the guide rod.

Description

Technical Field

[0001] This utility model relates to the field of stencil technology, and in particular to a stepped stencil for SMT mounting positioning. Background Technology

[0002] A stencil, also known as an SMT template, is a special mold used in SMT. Its main function is to help deposit solder paste, with the aim of transferring the exact amount of solder paste to the exact location on the blank PCB.

[0003] When using this method, the PCB board is placed on the bottom of the stencil, and then solder paste is dripped onto the stencil and applied to the PCB board for printing. However, the PCB board is prone to shaking during the printing process, which can lead to inaccurate printing positions and reduced printing quality. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a stepped steel mesh for SMT mounting positioning.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A stepped stencil for SMT mounting includes a stencil body. Slide grooves are formed on both inner walls of the stencil body, and two slide rods are movably connected within these grooves. Detachable fixing components are provided between the two ends of each slide rod and the stencil body. A limiting groove is formed on one side of each slide rod, and a slider is movably connected within the limiting groove. A connecting plate is fixedly connected to the top of the slider, and a pin is inserted into the interior of the connecting plate. Multiple circular grooves are formed on the top of each slide rod, and the pin is inserted into these grooves. A lead screw is movably connected to one end of the connecting plate, and a clamping plate is fixedly connected to the bottom end of the lead screw.

[0007] As a further embodiment of this utility model, the fixing component includes a sliding opening, which is opened on both sides of the steel mesh body. Both ends of the sliding rod pass through the sliding opening and are fixedly connected to a connecting block. The connecting block has a threaded opening inside, and a threaded rod is movably connected inside the threaded opening. One end of the threaded rod is fixedly connected to an insert block. Multiple slots are opened on both sides of the steel mesh body.

[0008] As a further embodiment of this invention, the insert block is inserted into the slot.

[0009] As a further embodiment of this utility model, a guide rod is fixedly connected inside the slide groove, and the slide rod and the guide rod are slidably connected.

[0010] As a further improvement of this utility model, a first knob is fixedly connected to the top end of the lead screw.

[0011] As a further improvement of this invention, a second knob is fixedly connected to one end of the insert block.

[0012] As a further improvement of this invention, a rubber pad is fixedly connected to the bottom of the clamping plate.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. In this utility model, the clamping plate enables the PCB board to be stably positioned, preventing the PCB board from shaking during the printing process, which would reduce the printing quality and improve the effectiveness of the device.

[0015] 2. This utility model can not only adjust the position of the two sliding rods within the steel mesh body, but also adjust and fix the position of the connecting plate within the sliding rods, thereby enabling the positioning of PCB boards of different sizes and improving the flexibility of the device.

[0016] 3. In this utility model, a guide rod is provided to guide the sliding rod, thereby enabling the sliding rod to move stably and improving the guiding function of the device. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the front three-dimensional structure of a stepped steel mesh for SMT mounting positioning proposed in this utility model;

[0018] Figure 2 This is a schematic diagram of the bottom structure of a stepped steel mesh for SMT mounting positioning proposed in this utility model.

[0019] Figure 3 This is a partial cross-sectional view of the stepped steel mesh for SMT mounting positioning proposed in this utility model.

[0020] Figure 4 This is an enlarged structural diagram of part A of the stepped steel mesh for SMT mounting positioning proposed in this utility model.

[0021] Figure 5 This is a partially enlarged structural diagram of a stepped steel mesh for SMT mounting positioning proposed in this utility model.

[0022] In the diagram: 1. Steel mesh body; 2. Slide groove; 3. Slide rod; 4. Guide rod; 6. Connecting block; 7. Slide opening; 8. Threaded opening; 9. Threaded rod; 10. Insert block; 11. Slot; 12. Limiting groove; 13. Slider; 14. Circular groove; 15. Pin; 16. Connecting plate; 17. Lead screw; 18. Clamping plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. The described embodiments are only some embodiments of the present utility model, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are all within the protection scope of the present utility model.

[0024] Reference Figures 1-5 A stepped stencil for SMT mounting includes a stencil body 1. Slide grooves 2 are formed on both inner walls of the stencil body 1. Two slide rods 3 are slidably connected within the slide grooves 2. Detachable fixing components are provided between the two ends of the slide rods 3 and the stencil body 1. A PCB board is placed in the middle position inside the stencil body 1, and the two slide rods 3 are pushed, causing them to move along the slide grooves 2 until the slide rods 3 contact the sides of the PCB board. The fixing components then fix the position of the slide rods 3. A limiting groove 12 is formed on one side of each slide rod 3, and a slider 13 is slidably connected within the limiting groove 12. A connecting plate 16 is welded to the top of the slider 13. The interior of the connecting plate 16... A pin 15 is inserted into the slide bar 3. The top of the slide bar 3 has multiple circular slots 14, and the pin 15 is inserted into the circular slots 14. When it is necessary to adjust the position of the connecting plate 16, the pin 15 is separated from the circular slots 14 and the connecting plate 16, the connecting plate 16 is pushed, and the slider 13 is moved along the limiting groove 12 to the required position. Then the pin 15 is reinserted into the circular slot 14. One end of the connecting plate 16 is threadedly connected to a lead screw 17. The bottom end of the lead screw 17 is fixed with a clamping plate 18 by bolts. Rotating the lead screw 17 causes the clamping plate 18 to move downward until the clamping plate 18 contacts the upper surface of the PCB board, thereby making the PCB board stably positioned.

[0025] In this utility model, it should be noted that the fixing component includes a sliding opening 7, which is opened on both sides of the steel mesh body 1. Both ends of the sliding rod 3 pass through the sliding opening 7 and are fixed with connecting blocks 6 by bolts. The connecting block 6 has a threaded opening 8 inside, and a threaded rod 9 is threadedly connected inside the threaded opening 8. One end of the threaded rod 9 is welded with an insert block 10. Both sides of the steel mesh body 1 have multiple slots 11. The insert block 10 is inserted into the slot 11. The sliding rod 3 moves to move the connecting block 6 until the threaded opening 8 is connected to the slot 11. Then, the threaded rod 9 is rotated to move the insert block 10 into the corresponding slot 11, thereby fixing the position of the sliding rod 3. A guide rod 4 is fixed in the sliding groove 2 by bolts, and the sliding rod 3 is slidably connected to the guide rod 4. The guide rod 4 can guide the sliding rod 3 so that it can move stably. A first knob is welded to the top of the screw 17, and a second knob is welded to one end of the insert block 10. A rubber pad is glued to the bottom of the clamping plate 18.

[0026] Working principle: When the PCB board needs to be positioned, first place the PCB board in the middle position inside the stencil body 1, push the two slide rods 3 to move them along the slide groove 2 until the slide rods 3 contact the side of the PCB board. At the same time, the slide rods 3 move to move the connecting block 6 until the threaded opening 8 connects with the slot 11. Then rotate the threaded rod 9 to move the insert block 10 into the corresponding slot 11, thereby fixing the position of the slide rod 3. Then rotate the lead screw 17 to drive the clamping plate 18 to move downward until the clamping plate 18 contacts the upper surface of the PCB board, thereby making the PCB board stably positioned.

[0027] Furthermore, the terms "installation," "setup," "connection," and "socketing" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral constructions; they can refer to mechanical or electrical connections; they can refer to direct connections or indirect connections via an intermediate medium, or internal connections between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

Claims

1. A stepped stencil for SMT mounting positioning, comprising a stencil body (1), characterized in that, The inner walls of both sides of the steel mesh body (1) are provided with sliding grooves (2). Two sliding rods (3) are movably connected in the sliding grooves (2). The two ends of the sliding rods (3) are provided with detachable fixing components between them and the steel mesh body (1). A limiting groove (12) is provided on one side of the sliding rod (3). A slider (13) is movably connected in the limiting groove (12). A connecting plate (16) is fixedly connected to the top of the slider (13). A pin (15) is inserted into the inside of the connecting plate (16). Multiple circular grooves (14) are provided on the top of the sliding rod (3). The pin (15) is inserted into the circular groove (14). A lead screw (17) is movably connected to one end of the connecting plate (16). A clamping plate (18) is fixedly connected to the bottom end of the lead screw (17).

2. The SMT mounting positioning stepped stencil according to claim 1, characterized in that, The fixing component includes a sliding opening (7), which is opened on both sides of the steel mesh body (1). Both ends of the sliding rod (3) pass through the sliding opening (7) and are fixedly connected to a connecting block (6). The connecting block (6) has a threaded opening (8) inside, and a threaded rod (9) is movably connected inside the threaded opening (8). One end of the threaded rod (9) is fixedly connected to an insert block (10). Both sides of the steel mesh body (1) have multiple slots (11).

3. The SMT mounting positioning stepped stencil according to claim 2, characterized in that, The plug (10) is inserted into the slot (11).

4. The SMT mounting positioning stepped stencil according to claim 1, characterized in that, A guide rod (4) is fixedly connected inside the groove (2), and the slide rod (3) is slidably connected to the guide rod (4).

5. The SMT mounting positioning stepped stencil according to claim 1, characterized in that, The top end of the lead screw (17) is fixedly connected to a first knob.

6. The SMT mounting positioning stepped stencil according to claim 2, characterized in that, A second knob is fixedly connected to one end of the plug (10).

7. The SMT mounting positioning stepped stencil according to claim 1, characterized in that, A rubber pad is fixedly connected to the bottom of the clamp (18).

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