Positioning tray for preventing deformation of PCB (Printed Circuit Board)

Abstract

The utility model relates to the technical field of PCB (printed circuit board) processing, in particular to a positioning tray for preventing deformation of a PCB, which comprises a mounting frame, a fixed supporting plate is fixedly connected onto the mounting frame, a moving structure is mounted on the mounting frame, a moving supporting plate is mounted on the moving structure, and the moving supporting plate is fixedly connected onto the mounting frame. Second screws are rotationally connected to the fixed supporting plate and the movable supporting plate correspondingly, sliding plates are in threaded connection to the second screws, the two sliding plates are slidably connected with the fixed supporting plate and the movable supporting plate correspondingly, a plurality of protruding blocks are slidably connected to the sliding plates, and positioning blocks are fixedly connected to the top ends of the protruding blocks. A circuit board body is installed between the fixed supporting plate and the movable supporting plate, and the multiple positioning blocks abut against the upper end face of the circuit board body. The circuit board body is clamped more conveniently, more time and labor are saved, the sliding plate drives the multiple positioning blocks to move synchronously to abut against the circuit board body, the circuit board body can be pressed evenly, and deformation of the circuit board body is prevented.

Description

Technical Field

[0001] This utility model relates to a positioning tray, specifically a positioning tray for preventing PCB circuit board deformation, and belongs to the field of PCB circuit board processing technology. Background Technology

[0002] A PCB reflow fixture is a positioning tray used in the electronic manufacturing process to help PCBs pass smoothly through soldering equipment such as wave soldering and reflow soldering. During the reflow process, especially in the high-temperature reflow or wave soldering stages, the weight of the PCB and the thermal stress it experiences can easily cause deformation. The reflow fixture can provide uniform support under the PCB, distributing the weight of the PCB to various support points of the fixture, thus avoiding deformation caused by excessive local stress. Traditional reflow fixtures require placing the PCB on a tray and then rotating the positioning blocks one by one, so that multiple positioning blocks abut against the upper surface of the PCB and prevent the PCB from moving.

[0003] However, rotating the positioning blocks one by one is cumbersome, requiring many steps and time, which greatly reduces the clamping speed of the circuit board. In large-scale production, this will affect the overall production efficiency. Furthermore, during the process of rotating the positioning blocks one by one, the different operating sequence and force can easily lead to uneven pressure on the circuit board by each positioning block, which can cause slight displacement or deformation of the circuit board during the reflow process, affecting the welding accuracy and product quality. Utility Model Content

[0004] The purpose of this utility model is to provide a positioning tray that prevents PCB circuit board deformation in order to solve the above problems, making it more convenient and time-saving to clamp the circuit board body. Furthermore, by using a sliding plate to drive multiple positioning blocks to move synchronously and press against the circuit board body, the circuit board body can be evenly compressed, preventing the circuit board body from deforming.

[0005] This utility model achieves the above-mentioned objective through the following technical solution: a positioning tray for preventing PCB circuit board deformation, comprising a mounting frame, a fixed support plate fixedly connected to the mounting frame, a movable structure mounted on the mounting frame, a movable support plate mounted on the movable structure, and positioning structures mounted on both the fixed support plate and the movable support plate. Each positioning structure includes a second screw, and the second screw is rotatably connected to both the fixed support plate and the movable support plate. A sliding plate is threaded onto the second screw, and two sliding plates are slidably connected to the fixed support plate and the movable support plate, respectively. Multiple protrusions are slidably connected to the sliding plates, and positioning blocks are fixedly connected to the top of each protrusion. A circuit board body is mounted between the fixed support plate and the movable support plate, and the multiple positioning blocks abut against the upper surface of the circuit board body.

[0006] Preferably, the mounting bracket has a "U" shaped structure, and the cross-sections of both the fixed tray and the movable tray have a stepped structure.

[0007] Preferably, the slide plate has a "T" shaped cross-section, the protrusion has a trapezoidal cross-section, and the end of the positioning block has an inclined surface.

[0008] Preferably, a third screw is threaded onto the protrusion, and a connecting block is rotatably connected to the bottom end of the third screw, the connecting block abutting against the sliding plate.

[0009] Preferably, both the fixed tray and the movable tray are fixedly connected to two first guide rods, and the slide plate is slidably connected to the first guide rods.

[0010] Preferably, the movable structure includes sliders, and two sliders are slidably connected to the mounting bracket, with the two sliders respectively fixedly connected to both ends of the movable tray.

[0011] Preferably, a first screw is threaded onto the slider, and a stop block is rotatably connected to the bottom end of the first screw, the stop block abutting against the mounting bracket.

[0012] Preferably, one of the sliders is threaded with a lead screw, the end of which is fixedly connected to a mounting block, and a reinforcing rod is fixedly connected to the mounting block, the reinforcing rod abutting against the circuit board body.

[0013] Preferably, a second guide rod is slidably connected to another slider, and another mounting block is installed at the end of the second guide rod, the mounting block being fixedly connected to the reinforcing rod.

[0014] The beneficial effects of this utility model are as follows: a fixed support plate is fixedly connected to the mounting frame, a movable structure is installed on the mounting frame, a movable support plate is installed on the movable structure, a second screw is rotatably connected to both the fixed support plate and the movable support plate, a sliding plate is threaded onto the second screw, the two sliding plates are slidably connected to the fixed support plate and the movable support plate respectively, multiple protrusions are slidably connected on the sliding plates, a positioning block is fixedly connected to the top of the protrusion, a circuit board body is installed between the fixed support plate and the movable support plate, and multiple positioning blocks abut against the upper end surface of the circuit board body; firstly, the sliding plates synchronously drive multiple positioning blocks to move and adjust the distance between the positioning blocks and the support plate, and then the movable structure drives the movable support plate to move towards the circuit board body, so that the movable support plate, together with the positioning blocks, quickly positions the circuit board body, thereby making the clamping of the circuit board body more convenient, more time-saving and labor-saving, and the synchronous movement of multiple positioning blocks driven by the sliding plates to abut against the circuit board body can make the circuit board body be evenly pressured and prevent the circuit board body from deforming. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the connection structure between the mounting bracket and the slider of this utility model;

[0017] Figure 3 for Figure 2 The diagram shown is an enlarged view of the structure of part A.

[0018] Figure 4 This is a schematic diagram of the connection structure between the fixed support plate and the circuit board body of this utility model;

[0019] Figure 5 for Figure 3 The diagram shows an enlarged view of section B.

[0020] In the diagram: 1. Mounting bracket; 2. Fixed support plate; 3. Moving structure; 301. Slider; 302. First screw; 303. Abutment; 4. Moving support plate; 5. Positioning structure; 501. Slide plate; 502. Second screw; 503. Protrusion; 504. Positioning block; 505. Third screw; 506. Connecting block; 507. First guide rod; 6. Circuit board body; 7. Lead screw; 8. Mounting block; 9. Reinforcing rod; 10. Second guide rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1-5 As shown, a positioning tray for preventing PCB circuit board deformation includes a mounting frame 1, a fixed support plate 2 fixedly connected to the mounting frame 1, a movable structure 3 mounted on the mounting frame 1, a movable support plate 4 mounted on the movable structure 3, and positioning structures 5 mounted on both the fixed support plate 2 and the movable support plate 4. Each positioning structure 5 includes a second screw 502, which is rotatably connected to both the fixed support plate 2 and the movable support plate 4. A sliding plate 501 is threaded onto the second screw 502, and the two sliding plates 501 are slidably connected to the fixed support plate 2 and the movable support plate 4, respectively. Multiple protrusions 503 are slidably connected to the sliding plates 501, and positioning blocks 504 are fixedly connected to the top of each protrusion 503. A circuit board body 6 is mounted between the fixed support plate 2 and the movable support plate 4, and the multiple positioning blocks 504 abut against the upper surface of the circuit board body 6. The mounting frame 1 has a "U" shaped structure, and the cross-sections of both the fixed support plate 2 and the movable support plate 4 are stepped.

[0023] As a technical optimization of this utility model, the cross-section of the sliding plate 501 is T-shaped, the cross-section of the protrusion 503 is trapezoidal, and the end of the positioning block 504 is inclined. Because the end of the positioning block 504 is inclined, the positioning block 504 abuts the edge of the circuit board body 6 more and more tightly, which increases the stability of the positioning block 504 in positioning the circuit board body 6.

[0024] As a technical optimization of this utility model, a third screw 505 is threadedly connected to the protrusion 503, and a connecting block 506 is rotatably connected to the bottom end of the third screw 505. The connecting block 506 abuts against the slide plate 501. When it is necessary to adjust the lateral position of the positioning block 504 according to the size of the circuit board body 6, the third screw 505 is rotated, and the third screw 505 drives the connecting block 506 to move upward, so that the connecting block 506 no longer abuts against the slide plate 501. Then, the positioning block 504 is pulled to move. The movement of the positioning block 504 simultaneously drives the protrusion 503 to slide along the extension direction of the slide plate 501, thereby facilitating the adjustment of the position of the positioning block 504 and improving the applicability of the positioning block 504 and the reflow fixture.

[0025] As a technical optimization of this utility model, two first guide rods 507 are fixedly connected to both the fixed support plate 2 and the movable support plate 4, and the slide plate 501 is slidably connected to the first guide rods 507; the first guide rods 507 have a good guiding effect on the slide plate 501, making the slide plate 501 slide more stably.

[0026] As a technical optimization of this utility model, the movable structure 3 includes a slider 301. Two sliders 301 are slidably connected to the mounting bracket 1. The two sliders 301 are respectively fixedly connected to both ends of the movable support plate 4. A first screw 302 is threadedly connected to the slider 301. A stop block 303 is rotatably connected to the bottom end of the first screw 302. The stop block 303 abuts against the mounting bracket 1. The movable support plate 4 is pushed towards the circuit board body 6, so that the movable support plate 4 abuts against the other end of the circuit board body 6, and cooperates with the positioning block 504 on the movable support plate 4 to move the other end of the circuit board body 6. The moving tray 4 drives the sliders 301 at both ends to slide on the mounting bracket 1. When the moving tray 4 presses against the circuit board body 6, the first screw 302 is rotated. The first screw 302 drives the abutment block 303 to move upward, so that the abutment block 303 presses against the bottom end of the mounting bracket 1, thereby fixing the slider 301 and the moving tray 4, and pressing the positioning block 504 against the upper end surface of the circuit board body 6 to prevent the circuit board body 6 from moving. This makes the clamping of the circuit board body 6 more convenient and flexible. The moving tray 4 driven by the slider 301 makes the reflow fixture suitable for circuit board bodies 6 of different sizes.

[0027] As a technical optimization of this utility model, one of the sliders 301 is threadedly connected to a lead screw 7, and an installation block 8 is fixedly connected to the end of the lead screw 7. A reinforcing rod 9 is fixedly connected to the installation block 8, and the reinforcing rod 9 abuts against the circuit board body 6. Another slider 301 is slidably connected to a second guide rod 10, and another installation block 8 is installed at the end of the second guide rod 10. The installation block 8 is fixedly connected to the reinforcing rod 9. When the size of the circuit board body 6 to be processed changes, the lead screw 7 is rotated, and the lead screw 7 drives the reinforcing rod 9 to move through the installation block 8, so that the reinforcing rod 9 moves to the middle of the circuit board body 6 without obstructing the solder joints of the circuit board body 6. By supporting the middle of the circuit board body 6 with the reinforcing rod 9, additional support force can be provided for the circuit board body 6, distributing the weight of the circuit board body 6, reducing deformation caused by gravity and high temperature, and ensuring that the circuit board body 6 can still maintain good flatness after reflow.

[0028] In use, this invention first adjusts the distance between the positioning block 504 and the fixed support plate 2 and the movable support plate 4 according to the thickness of the circuit board body 6, ensuring that the distance between the positioning block 504 and the fixed support plate 2 and the movable support plate 4 is slightly greater than the thickness of the circuit board body 6. During operation, the second screw 502 is rotated, and the screw 502 drives the sliding plate 501 to slide. The sliding plate 501 simultaneously moves the positioning block 504, thereby simultaneously adjusting multiple positioning blocks 504 to ensure that the height of multiple positioning blocks 504 is consistent, making the operation flexible and ensuring that the circuit board body 6 is evenly pressured, preventing deformation of the circuit board body 6. When it is necessary to adjust the positioning block 504 according to the size of the circuit board body 6... When the circuit board is in the lateral position (4), rotate the third screw 505. The third screw 505 drives the connecting block 506 to move upward, so that the connecting block 506 no longer abuts against the slide plate 501. Then, pull the positioning block 504 to move. The movement of the positioning block 504 simultaneously drives the protrusion 503 to slide along the extension direction of the slide plate 501, thereby facilitating the adjustment of the position of the positioning block 504 and improving the applicability of the positioning block 504 and the reflow fixture. Then, push the circuit board body 6 from the side between the fixed support plate 2 and the positioning block 504. Because the end of the positioning block 504 has a beveled structure, the positioning block 504 abuts against the edge of the circuit board body 6 more and more tightly. At this time, the reinforcing rod 9 supports the circuit board body 6 upward and moves it away from the fixed support plate 2. One end of the fixed support plate 2 is used to quickly complete the initial installation of the circuit board body 6; then, the movable support plate 4 is pushed towards the circuit board body 6, so that the movable support plate 4 is pressed against the other end of the circuit board body 6, and the positioning block 504 on the movable support plate 4 clamps the other end of the circuit board body 6. At the same time, the movable support plate 4 drives the sliders 301 at both ends to slide on the mounting bracket 1. After the movable support plate 4 is pressed against the circuit board body 6, the first screw 302 is rotated. The first screw 302 drives the abutment block 303 to move upward, so that the abutment block 303 is pressed against the bottom end of the mounting bracket 1, thereby fixing the slider 301 and the movable support plate 4, and pressing the positioning block 504 against the upper end surface of the circuit board body 6 to prevent... The sliding block 301 prevents the circuit board body 6 from moving and makes the clamping of the circuit board body 6 more convenient and flexible. The sliding block 301 drives the moving tray 4 to move so that the reflow fixture can be adapted to circuit board bodies 6 of different sizes. When the size of the circuit board body 6 to be processed changes, the lead screw 7 is rotated. The lead screw 7 drives the reinforcing rod 9 to move through the mounting block 8. The reinforcing rod 9 moves to the middle of the circuit board body 6 without blocking the solder joints of the circuit board body 6. By supporting the middle of the circuit board body 6 through the reinforcing rod 9, it can provide additional support force for the circuit board body 6, distribute the weight of the circuit board body 6, reduce deformation caused by gravity and high temperature, and ensure that the circuit board body 6 can still maintain good flatness after reflow.

[0029] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0030] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A positioning tray for preventing deformation of a PCB circuit board, comprising a mounting frame (1), characterized in that: The mounting frame (1) is fixedly connected with a fixed supporting plate (2), the mounting frame (1) is provided with a moving structure (3), the moving structure (3) is provided with a moving supporting plate (4), the fixed supporting plate (2) and the moving supporting plate (4) are provided with a positioning structure (5), the positioning structure (5) comprises a second screw rod (502), the fixed supporting plate (2) and the moving supporting plate (4) are rotatably connected with the second screw rod (502), the second screw rod (502) is threadedly connected with a sliding plate (501), the two sliding plates (501) are slidably connected with the fixed supporting plate (2) and the moving supporting plate (4) respectively, the sliding plate (501) is slidably connected with a plurality of protrusions (503), the top end of the protrusion (503) is fixedly connected with a positioning block (504), the fixed supporting plate (2) and the moving supporting plate (4) are provided with a circuit board body (6), and the plurality of positioning blocks (504) abut the upper end surface of the circuit board body (6).

2. The positioning tray for preventing deformation of a PCB according to claim 1, wherein: The mounting frame (1) is in a "U" shape, and the fixed supporting plate (2) and the moving supporting plate (4) are both in a stepped shape.

3. The positioning tray for preventing deformation of a PCB according to claim 1, wherein: The cross section of the sliding plate (501) is in a "T" shape, the cross section of the protrusion (503) is in a trapezoidal shape, and the end of the positioning block (504) is in an inclined surface structure.

4. The positioning tray for preventing deformation of a PCB according to claim 3, wherein: The protrusion (503) is threadedly connected with a third screw rod (505), the bottom end of the third screw rod (505) is rotatably connected with a connecting block (506), and the connecting block (506) abuts the sliding plate (501).

5. The positioning tray for preventing deformation of a PCB according to claim 4, wherein: The fixed supporting plate (2) and the moving supporting plate (4) are both fixedly connected with two first guide rods (507), and the sliding plate (501) is slidably connected with the first guide rods (507).

6. The positioning tray for preventing deformation of a PCB according to claim 1, wherein: The moving structure (3) comprises a sliding block (301), the mounting frame (1) is slidably connected with two sliding blocks (301), and the two sliding blocks (301) are fixedly connected with the two ends of the moving supporting plate (4) respectively.

7. The positioning tray for preventing deformation of a PCB according to claim 6, wherein: The sliding block (301) is threadedly connected with a first screw rod (302), and the bottom end of the first screw rod (302) is rotatably connected with an abutting block (303) which abuts the mounting frame (1).

8. The positioning tray for preventing deformation of a PCB according to claim 7, wherein: One of the sliding blocks (301) is threadedly connected with a lead screw (7), the end of the lead screw (7) is fixedly connected with one mounting block (8), the mounting block (8) is fixedly connected with a reinforcing rod (9), and the reinforcing rod (9) abuts the circuit board body (6).

9. The positioning tray for preventing deformation of a PCB according to claim 8, wherein: The other sliding block (301) is slidably connected with a second guide rod (10), the end of the second guide rod (10) is provided with the other mounting block (8), and the mounting block (8) is fixedly connected with the reinforcing rod (9).

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