PCB baking anti-deformation bracket
By designing a PCB baking anti-deformation bracket, and using lifting components and a synchronous transmission system to fix and fine-tune the four corners of the PCB, the problem of deformation of thin and large PCBs during baking is solved, ensuring the quality of the PCB and the soldering quality.
Patent Information
- Application Number
- CN202423167292.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-13
- Publication Date
- 2026-03-03
- Estimated Expiration
- 2035-12-13
AI Technical Summary
Thin and large PCBs are prone to severe deformation during baking, especially without auxiliary tooling. Thermal and mechanical stresses have a significant impact, leading to increased bending and deformation, which affects the soldering quality.
A PCB baking anti-deformation bracket was designed, including a support plate and a lifting assembly. The four corners of the PCB are fixed and finely adjusted by four stainless steel pressure bars. The lifting assembly and synchronous transmission system are used to achieve comprehensive and uniform pressure on the PCB and release the pressure, thus avoiding deformation.
It effectively prevents PCB from bending and deforming during baking, improves PCB quality, ensures subsequent soldering quality, and achieves flexibility and stability of holding through the elastic reset function of the lifting component.
Smart Images
Figure CN223968049U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of PCB baking technology, and in particular to a PCB baking anti-deformation bracket. Background Technology
[0002] PCB, or Printed Circuit Board, is an indispensable component in modern electronic devices. It is a board that forms electrical connections between electronic components by laying conductive copper foil in a pattern on the surface of an insulating material (such as fiberglass, epoxy resin, etc.). In the PCB manufacturing process, baking is a crucial step used to cure solder resist ink, characters, etc.
[0003] However, for thinner, larger PCBs, severe deformation problems often occur during baking, especially when these PCBs are already slightly deformed. Firstly, thinner PCBs, due to their lighter weight, are easily bent by the strong airflow in the oven during baking. Simultaneously, the thermal stress generated during baking causes microscopic strain and overall deformation of the PCB, especially when slight deformation already exists, this thermal stress further exacerbates the deformation. Secondly, larger PCBs are also prone to warping and deformation during baking due to uneven heating and their own weight. Especially without auxiliary fixtures, the PCB lacks sufficient support and fixation during baking, making it more susceptible to thermal and mechanical stress, thus intensifying deformation. Utility Model Content
[0004] In order to overcome the defects of the prior art mentioned above, the inventors conducted in-depth research and, after a great deal of creative work, completed this utility model.
[0005] Specifically, the technical problem to be solved by this utility model is to provide a PCB baking anti-deformation bracket to solve the current technical problem that there is often a serious deformation problem during the baking process of PCBs that are thin and large in size.
[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution:
[0007] A PCB baking anti-deformation bracket includes a support plate, a limiting frame is fixed to the top of the support plate, and a workpiece cavity for limiting the PCB board is formed between the support plate and the inner cavity of the limiting frame.
[0008] The lifting assembly is installed on one end face of the bearing plate near the limiting frame. Stainless steel pressure strips are fixed at the four movable ends of the lifting assembly, and the four stainless steel pressure strips are distributed at the four corners of the workpiece cavity. The lifting assembly can lift the stainless steel pressure strips to move vertically.
[0009] As an improved technical solution, protruding strips are fixed on the lower side of the four corners of the inner cavity of the material limiting frame, and a side groove is opened on one side of the inner cavity of the material limiting frame.
[0010] As an improved technical solution, a protrusion is fixed in the middle of the side groove, and two protrusions are fixed on the other side of the inner cavity of the material limiting frame.
[0011] As an improved technical solution, the lifting assembly includes four rotating shafts rotatably mounted at the four corners of the support plate. Rotating through holes for the rotating shafts to pass through are provided at the four corners of the limiting frame. A hollow rectangular frame is slidably installed between the four rotating shafts, and sliding holes for sliding with the rotating shafts are provided at the four corners of the hollow rectangular frame. A lifting block is slidably installed on the rotating shaft and above the first protrusion, and a stainless steel pressure strip is fixed to one end of the lifting block.
[0012] As an improved technical solution, each of the four rotating shafts is fitted with a synchronous pulley, and the synchronous pulley is located below the hollow rectangular frame, with a synchronous belt installed between the four synchronous pulleys.
[0013] As an improved technical solution, limit grooves are provided at both ends of the top of the rotating shaft, and limit sliders that slide vertically inside the limit grooves are fixed on both sides of the inner wall of the upper sliding hole of the lifting block.
[0014] As an improved technical solution, a baffle is fixed at the top of the rotating shaft, and a spring is sleeved on the rotating shaft on the opposite side of the lifting block and the baffle. Handles are fixed at the top of the four sides of the hollow rectangular frame.
[0015] As an improved technical solution, the stainless steel pressure strip includes a vertical end fixed on the lifting block, an inclined end integrally formed at the end of the vertical end away from the lifting block, and the connection end between the vertical end and the inclined end is arc-shaped. A bending pressure end integrally formed at the end of the inclined end away from the vertical end, and a round hole is opened on the bending pressure end.
[0016] After adopting the above technical solution, the beneficial effects of this utility model are:
[0017] 1. This utility model uses four stainless steel pressure strips to press down on the four corners of the PCB board, thereby applying comprehensive and uniform downward pressure to the four corners of the PCB board and fixing the PCB board inside the cavity. By using auxiliary tooling to press down the thin and large PCB board, the PCB board cannot be bent, which greatly avoids problems such as PCB warping and deformation during PCB baking, improves the quality of the PCB board, and avoids affecting the subsequent soldering quality.
[0018] 2. In this utility model, the lifting bracket moves the hollow rectangular frame upward, and the four lifting blocks simultaneously move the stainless steel pressure strips at the four corners upward, so that the stainless steel pressure strips release the downward pressure on the PCB board. At this time, the lifting blocks will compress the spring. When the upward lifting of the hollow rectangular frame is released, the hollow rectangular frame is pressed down and reset under the elastic reset action of the spring, so that the stainless steel pressure strips are reset, and the stainless steel pressure strips once again press and fix the workpiece at its lower end.
[0019] 3. In this utility model, under the synchronous transmission of four synchronous pulleys and synchronous belts, the rotation of one rotating shaft will synchronously drive the other three rotating shafts to rotate synchronously, so that all four rotating shafts are in a rotating state, thereby driving the other three stainless steel pressure bars to rotate synchronously. That is, driving one stainless steel pressure bar to rotate will also synchronously drive the remaining three stainless steel pressure bars to rotate, and the position of the four stainless steel pressure bars can be finely adjusted synchronously. Attached Figure Description
[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:
[0021] Figure 1 This is a schematic diagram of the overall structure of the PCB baking anti-deformation bracket of this utility model.
[0022] Figure 2 This is a schematic diagram of the material limiting frame of the PCB baking anti-deformation bracket of this utility model.
[0023] Figure 3 This is a schematic diagram of the lifting assembly of the PCB baking anti-deformation bracket of this utility model.
[0024] Figure 4 This utility model provides a PCB baking anti-deformation bracket. Figure 3 A schematic diagram of the structure at point A in the middle.
[0025] Figure 5 This is a schematic diagram of the rotating shaft of the PCB baking anti-deformation bracket of this utility model.
[0026] Figure 6 This is a schematic diagram of the stainless steel pressure strip of the PCB baking anti-deformation bracket of this utility model.
[0027] Explanation of reference numerals in the attached figures:
[0028] 1. Bearing plate; 11. Material limiting frame; 12. Rotary perforation; 13. Side groove; 14. Protrusion 1; 15. Protrusion 2; 16. Protrusion; 2. Lifting assembly; 21. Rotating shaft; 22. Synchronous belt; 23. Synchronous pulley; 24. Hollow rectangular frame; 25. Lifting block; 26. Spring; 27. Baffle; 28. Limiting slide groove; 29. Limiting slider; 3. Stainless steel pressure strip; 31. Vertical end; 32. Angled end; 33. Bending pressure end. Detailed Implementation
[0029] 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.
[0030] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0031] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.
[0032] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.
[0033] like Figures 1 to 6 As shown in the figure, this embodiment provides a PCB baking anti-deformation bracket. This PCB baking anti-deformation bracket includes a support plate 1, a limiting frame 11 is fixed on the top of the support plate 1, and a workpiece cavity for limiting the PCB board is formed between the support plate 1 and the inner cavity of the limiting frame 11.
[0034] The lifting assembly 2 is installed on one end face of the bearing plate 1 near the limiting frame 11. Stainless steel pressure strips 3 are fixed to the movable ends of the four corners of the lifting assembly 2, and the four stainless steel pressure strips 3 are distributed at the four corners of the workpiece cavity. The four stainless steel pressure strips 3 press down on the four corners of the PCB board, thereby pressing down on the PCB board comprehensively and evenly, fixing the PCB board inside the workpiece cavity. By using auxiliary tooling to press down the thin and large PCB, the PCB board cannot be bent, which greatly avoids problems such as PCB bending and deformation during PCB baking, improves the quality of the PCB board, and avoids affecting the subsequent soldering quality. The lifting assembly 2 can lift the stainless steel pressure strips 3 for vertical lifting and moving.
[0035] like Figures 1 to 2 As shown in the figure, in this embodiment, protrusions 15 are fixed on the lower side of the four corners of the inner cavity of the material limiting frame 11, and a side groove 13 is provided on one side of the inner cavity of the material limiting frame 11.
[0036] like Figures 1 to 2 As shown in the figure, in this embodiment, a protrusion 14 is fixed in the middle of the side groove 13, and two protrusions 16 are fixed on the other side of the inner cavity of the material limiting frame 11.
[0037] The first protrusion 14, the four second protrusions 15 and the protrusion 16 support the bottom of the PCB, so that the bottom of the PCB is isolated from the carrier plate 1.
[0038] like Figures 3 to 5 As shown in the figure, in this embodiment, the lifting assembly 2 includes four rotating shafts 21 rotatably mounted on the four corners of the support plate 1. Rotating through holes 12 for the rotating shafts 21 to pass through are provided at the four corners of the limiting frame 11. A hollow rectangular frame 24 is slidably mounted between the four rotating shafts 21, and sliding holes for sliding with the rotating shafts 21 are provided at the four corners of the hollow rectangular frame 24. A lifting block 25 is slidably mounted on the rotating shaft 21 and above the protrusion 14, and a stainless steel pressure strip 3 is fixed on one end of the lifting block 25.
[0039] like Figures 3 to 4 As shown in the figure, in this embodiment, each of the four rotating shafts 21 is fitted with a synchronous pulley 23, and the synchronous pulley 23 is located below the hollow rectangular frame 24. A synchronous belt 22 is installed between the four synchronous pulleys 23.
[0040] like Figure 5As shown, in this embodiment, both ends of the top of the rotating shaft 21 are provided with limiting grooves 28. Both sides of the inner wall of the upper sliding hole of the lifting block 25 are fixed with limiting sliders 29 that slide vertically inside the limiting grooves 28. Driving a stainless steel pressure strip 3 to rotate will cause the lifting block 25 fixed to it to rotate. Under the vertical limiting sliding action of the upper limit slider 29 and the limiting groove 28 on the lifting block 25, the rotation of the lifting block 25 will drive the rotating shaft 21 to rotate. Under the synchronous transmission action of the four synchronous wheels 23 and the synchronous belt 22, the rotation of one rotating shaft 21 will synchronously drive the other three rotating shafts 21 to rotate synchronously, so that all four rotating shafts 21 are in a rotating state, thereby driving the other three stainless steel pressure strips 3 to rotate synchronously. That is, driving one stainless steel pressure strip 3 to rotate will also synchronously drive the remaining three stainless steel pressure strips 3 to rotate, and the positions of the four stainless steel pressure strips 3 can be finely adjusted synchronously.
[0041] like Figures 3 to 4 As shown in the figure, in this embodiment, a baffle 27 is fixed to the top of the rotating shaft 21, and a spring 26 is sleeved on the rotating shaft 21 and located on the opposite side of the lifting block 25 and the baffle 27. Handles are fixed to the top of the four sides of the hollow rectangular frame 24. The lifting bracket drives the hollow rectangular frame 24 to move upward. The four lifting blocks 25 simultaneously drive the stainless steel pressure strips 3 at the four corners to move upward, so that the stainless steel pressure strips 3 release the downward pressure on the PCB board. At this time, the lifting blocks 25 will compress the spring 26. When the upward pull on the hollow rectangular frame 24 is released, under the elastic reset action of the spring 26, the hollow rectangular frame 24 is pressed down and reset, so that the stainless steel pressure strips 3 are reset. The stainless steel pressure strips 3 then press and fix the workpiece at its lower end again.
[0042] like Figure 6 As shown, in this embodiment, the stainless steel pressure strip 3 includes a vertical end 31 fixed on the lifting block 25, an inclined end 32 integrally formed at the end of the vertical end 31 away from the lifting block 25, and the connection end between the vertical end 31 and the inclined end 32 is arc-shaped. A bending pressure end 33 integrally formed at the end of the inclined end 32 away from the vertical end 31, and a round hole is provided on the bending pressure end 33.
[0043] When in use, the PCB board is placed inside the workpiece cavity, and then four stainless steel pressure strips 3 are pressed on the four corners of the PCB board, thereby applying a comprehensive and even downward pressure to the four corners of the PCB board and fixing the PCB board inside the workpiece cavity. This greatly avoids problems such as PCB warping and deformation during PCB baking.
[0044] The lifting bracket moves the hollow rectangular frame 24 upward, and the four lifting blocks 25 simultaneously move the stainless steel pressure strips 3 at the four corners upward, so that the stainless steel pressure strips 3 release the downward pressure on the PCB board. At this time, the lifting blocks 25 will compress the spring 26. When the upward lifting of the hollow rectangular frame 24 is released, under the elastic reset action of the spring 26, the hollow rectangular frame 24 is pressed down and reset, so that the stainless steel pressure strips 3 are reset, and the stainless steel pressure strips 3 once again press and fix the workpiece at its lower end.
[0045] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.
Claims
1. A PCB baking anti-deformation bracket, characterized in that: Includes a support plate (1), a limiting frame (11) is fixed to the top of the support plate (1), and a workpiece cavity for limiting the PCB board is formed between the support plate (1) and the inner cavity of the limiting frame (11). The lifting assembly (2) is installed on one end face of the bearing plate (1) near the limiting frame (11). The movable ends of the four corners of the lifting assembly (2) are all fixed with stainless steel pressure strips (3), and the four stainless steel pressure strips (3) are distributed at the four corners of the workpiece cavity. The lifting assembly (2) can lift the stainless steel pressure strips (3) to move vertically.
2. The PCB baking anti-deformation bracket according to claim 1, characterized in that: The lower side of each of the four corners of the inner cavity of the limiting frame (11) is fixed with a second protrusion (15), and a side groove (13) is provided on one side of the inner cavity of the limiting frame (11).
3. The PCB baking anti-deformation bracket according to claim 2, characterized in that: A protrusion (14) is fixed in the middle of the side groove (13), and two protrusions (16) are fixed on the other side of the inner cavity of the material limiting frame (11).
4. The PCB baking anti-deformation bracket according to claim 3, characterized in that: The lifting assembly (2) includes four rotating shafts (21) rotatably mounted on the four corners of the support plate (1). The four corners of the limiting frame (11) are provided with rotating through holes (12) for the rotating shafts (21) to pass through. A hollow rectangular frame (24) is slidably mounted between the four rotating shafts (21), and the four corners of the hollow rectangular frame (24) are provided with sliding holes that slide with the rotating shafts (21). A lifting block (25) is slidably mounted on the rotating shaft (21) and above the protrusion (14), and a stainless steel pressure strip (3) is fixed on one end of the lifting block (25).
5. The PCB baking anti-deformation bracket according to claim 4, characterized in that: Synchronous pulleys (23) are fitted onto each of the four rotating shafts (21), and the synchronous pulleys (23) are located below the hollow rectangular frame (24). A synchronous belt (22) is installed between the four synchronous pulleys (23).
6. The PCB baking anti-deformation bracket according to claim 5, characterized in that: Both ends of the top of the rotating shaft (21) are provided with limiting grooves (28), and both sides of the inner wall of the upper sliding hole of the lifting block (25) are fixed with limiting sliders (29) that slide vertically inside the limiting grooves (28).
7. The PCB baking anti-deformation bracket according to claim 6, characterized in that: A baffle (27) is fixed to the top of the rotating shaft (21). A spring (26) is sleeved on the rotating shaft (21) and on the opposite side of the lifting block (25) and the baffle (27). Handles are fixed to the top of the four sides of the hollow rectangular frame (24).
8. The PCB baking anti-deformation bracket according to claim 7, characterized in that: The stainless steel pressure strip (3) includes a vertical end (31) fixed on the lifting block (25). The end of the vertical end (31) away from the lifting block (25) is integrally formed with an inclined end (32), and the connection end between the vertical end (31) and the inclined end (32) is arc-shaped. The end of the inclined end (32) away from the vertical end (31) is integrally formed with a bending pressure end (33), and a round hole is opened on the bending pressure end (33).