A kind of fixture for protecting element in PCB board spraying three-proof paint process

Abstract

The utility model provides a kind of clamp for protecting element in the process of PCB board spraying three-proof paint, it include: bottom plate and cover plate, the cover plate is frame-shaped frame structure, inside is equipped with vertical and horizontal interlaced support, detachably set protective cover above support, for in the process of spraying paint to the conductive area or element that PCB board needs to avoid spraying is shielded;Bottom plate is set below cover plate, and they are oppositely arranged to hold PCB board.Guide column is equipped on bottom plate, guide hole is equipped on cover plate and is matched with it, high-precision alignment and direction mistake-proof are realized by inserting joint.Two plates are locked and unlocked quickly by rotating press buckle, spring and square pressing block are arranged in rotating press buckle to form reliable locking.Bottom plate is equipped with protective cover to form paint leakage seal, cover plate is equipped with detachable protective cover and handle, and it is convenient to operate and replace.The clamp is simple in structure, shielding is accurate, loading and unloading is quick, sealing is reliable, and it is suitable for multiple models of PCB paint protection process.

Description

Technical Field

[0001] This utility model relates to the field of circuit board processing equipment technology, specifically to a fixture for protective components during the process of spraying conformal coating on PCB boards. Background Technology

[0002] Printed Circuit Boards (PCBs), as the core carriers of electronic products, serve the dual functions of electrical connection and mechanical support. To enhance the corrosion resistance, moisture resistance, and insulation performance of PCBs, a conformal coating or protective layer is typically applied to their surface during the production process. This coating process usually employs automated or manual methods to evenly cover the PCB surface with the protective coating. However, PCBs often contain numerous solder joints, metal terminals, conductive contacts, and electronic components. If these areas are accidentally coated or covered with a layer of paint, it will severely affect their conductivity and subsequent assembly quality.

[0003] The shortcomings of existing technology: 1. Without a protective cover to protect the conductive parts, the conformal coating process will cover them, affecting subsequent conductivity; 2. The locking structure is complex and the loading and unloading efficiency is low.

[0004] Therefore, existing technologies have shortcomings and need further improvement. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model provides a fixture for protective components during the process of spraying conformal coating on PCB boards.

[0006] To achieve the above objectives, the specific solution of this utility model is as follows: This utility model provides a fixture for protective components during the application of conformal coating on PCB boards, comprising: The cover plate consists of a frame-shaped frame and several supporting members located inside the frame-shaped frame. A protective cover is detachably installed on the top of the supporting members. The protective cover is used to shield conductive areas or components on the PCB board that need to be avoided from being sprayed during the application of conformal coating. The base plate is located below the cover plate; The cover plate is positioned opposite the base plate and is used to clamp the PCB board between them, so that the protective cover is located directly above the position of the PCB board that needs to be shielded.

[0007] Furthermore, the cover plate includes a frame-shaped border and support members that are fixedly connected to the frame-shaped border and distributed in a crisscross pattern. The support members are used to provide support and positioning reference for the protective cover in the clamping state.

[0008] Furthermore, the upper side of the base plate is provided with several guide posts, and the cover plate is provided with guide holes at positions corresponding to the guide posts. When the cover plate is closed to the base plate, the guide posts are inserted into the guide holes to achieve alignment and guidance.

[0009] Furthermore, the guide post is a frustum-shaped structure with a smaller top and a larger bottom, and the three guide posts are distributed at unequal intervals and cooperate with the corresponding guide holes, thereby forming a fault-proof positioning structure with unique directionality.

[0010] Furthermore, the cover plate is provided with several rectangular locking through holes, and the base plate is provided with rotating buckles at positions corresponding to each locking through hole. After passing through the locking through hole, the rotating buckles are rotated from the "assembly position" to the "locking position" to fix the cover plate to the base plate.

[0011] Furthermore, the rotary buckle includes a first bolt, a shaft, a square pressure block, and a first spring; The square pressure block has a receiving groove on its upper side, and the first spring is housed in the receiving groove; the first bolt and the shaft core are threaded together and pass through the first spring and the square pressure block in sequence; the lower end of the shaft core is fixed to the base plate by the second bolt; under normal conditions, the first spring presses the square pressure block against the lower side of the cover plate, and when the opposite side of the square pressure block is misaligned with the long side of the locking through hole, it is in the locked position, and when it is aligned with it, it is in the assembly / disassembly position.

[0012] Furthermore, the protective cover is a replaceable partial shielding component, with its lower edge connected to the support component or the frame-shaped edge via a positioning pin or buckle, and the opening and shielding surface are customized according to the geometric shape of the area to be shielded on the PCB board; the planar shape of the protective cover is selected from at least one of square, circle, L-shape or polygon.

[0013] Furthermore, the cover plate has a first clamping edge on its opposite sides, and the bottom plate has a corresponding second clamping edge on its opposite sides. The first clamping edge and the second clamping edge together limit the PCB board to the middle position between them during clamping and flipping.

[0014] Furthermore, the cover plate is provided with two handles on its upper side, for the operator to lift or remove the cover plate from the base plate.

[0015] Furthermore, on the side of the base plate facing the PCB board, an elastic pad or elastic gasket is provided along the corresponding area of ​​the support member. The elastic pad or elastic gasket is made of silicone or fluororubber and is used to provide surface contact support to the PCB board during clamping and to form a sealant fit against the anti-seepage paint. Several protective covers are also provided on the lower side of the base plate.

[0016] The technical solution of this utility model has the following beneficial effects: 1. Achieve high-precision clamping and shielding positioning of PCB boards. The clamping structure, with the cover plate and base plate positioned opposite each other, allows the PCB board to be stably positioned between them. The cover plate adopts a frame-shaped frame structure with crisscrossing support members inside. The layout of the support members provides planar support and also serves as a positioning reference for the protective cover, thereby ensuring that the protective cover accurately corresponds to the conductive areas or components on the PCB board that need to be shielded when spraying conformal coating, improving protection accuracy and consistency of repeated clamping.

[0017] 2. The guide posts and guide holes work together to form a high-precision alignment structure. Guide posts are installed on the base plate, and corresponding guide holes are installed on the cover plate. The cooperation between the two provides a stable insertion guide during the clamping process, effectively avoiding human alignment errors. The guide posts adopt a frustum-shaped structure with a smaller top and a larger bottom, and the three guide posts are distributed at unequal intervals. This not only enables rapid alignment guidance but also forms a unique directional anti-misalignment positioning structure, completely eliminating the risk of the upper and lower plates being installed in reverse and ensuring that the painting direction is always consistent with the masking area.

[0018] 3. Rapid locking and releasing mechanism improves production efficiency. The cover plate and base plate are locked together by a rotating snap-fit ​​structure. The rotating snap-fit ​​consists of a first bolt, a shaft, a square pressure block, and a first spring. Rotation switches between the "assembly position" and the "locked position," allowing for tool-free clamping and disassembly. This structure provides stable clamping in the locked state and allows for quick loading and unloading of PCB boards in the released state, significantly improving clamping efficiency and making it suitable for continuous spray coating production lines. Attached Figure Description

[0019] Figure 1 This is a top-view perspective view of the present invention; Figure 2 This is a perspective view of the present invention from a downward angle; Figure 3 This is a top-view perspective view of the cover plate of this utility model after the protective cover is installed; Figure 4 This is a perspective view of the cover plate of this utility model after the protective cover is installed, viewed from below. Figure 5 This is a top-view perspective view of the base plate of this utility model; Figure 6 This is a perspective view of the base plate of this utility model from a bottom angle; Figure 7 This is a top-view perspective view of the cover plate of this utility model; Figure 8 This is a top-view perspective view of the protective cover of this utility model; Figure 9 This is a perspective view of the protective cover of this utility model from a downward angle; Figure 10 This is a cross-sectional view of the rotary snap fastener of this utility model; Figure 11 This is an exploded view of the rotary snap fastener of this utility model; Attached image captions: 1. Cover plate; 2. Frame-shaped edge; 3. Support component; 4. Protective cover; 5. Base plate; 6. Guide post; 7. Guide hole; 8. Locking through hole; 9. Rotary buckle; 10. First bolt; 11. Shaft core; 12. Square pressure block; 13. First spring; 14. Second bolt; 15. First clamping edge; 16. Second clamping edge; 17. Handle. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0021] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0023] In the description of this embodiment, the terms "upper," "lower," "front," "rear," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0024] Combination Figures 1-11 As shown, this utility model provides a fixture for protective components during the application of conformal coating to PCB boards, comprising: The cover plate 1 is a frame-shaped frame 2 and several support members 3 located inside the frame-shaped frame 2. A protective cover 4 is detachably installed on the top of the support members 3. The protective cover 4 is used to shield the conductive areas or components on the PCB board that need to be avoided from being sprayed during the spraying of conformal coating. The base plate 5 is located below the cover plate 1; The cover plate 1 is positioned opposite to the base plate 5 and is used to clamp the PCB board between them, so that the protective cover 4 is located directly above the position of the PCB board that needs to be shielded.

[0025] The cover plate 1 includes a frame-shaped frame 2 and support members 3 that are fixedly connected to the frame-shaped frame 2 and distributed in a crisscross pattern. The support members 3 are used to provide support and positioning reference for the protective cover 4 in the clamping state.

[0026] The upper side of the base plate 5 is provided with a plurality of guide posts 6, and the cover plate 1 is provided with guide holes 7 at positions corresponding to the guide posts 6. When the cover plate 1 is closed to the base plate 5, the guide posts 6 are inserted into the guide holes 7 to achieve alignment and guidance.

[0027] The guide post 6 is a frustum-shaped structure with a smaller top and a larger bottom, and the three guide posts 6 are distributed at unequal intervals and cooperate with the corresponding guide holes 7, thereby forming a fault-proof positioning structure with unique direction.

[0028] The cover plate 1 is provided with a plurality of rectangular locking through holes 8. The base plate 5 is provided with rotating buckles 9 at positions corresponding to each locking through hole 8. The rotating buckles 9 pass through the locking through holes 8 and rotate from the "assembly position" to the "locking position" to fix the cover plate 1 to the base plate 5.

[0029] The rotary buckle 9 includes a first bolt 10, a shaft core 11, a square pressure block 12, and a first spring 13; The square pressure block 12 has a receiving groove on its upper side, and the first spring 13 is housed in the receiving groove; the first bolt 10 and the shaft core 11 are threaded together and pass through the first spring 13 and the square pressure block 12 in sequence; the lower end of the shaft core 11 is fixed to the base plate 5 by the second bolt 14; under normal conditions, the first spring 13 presses the square pressure block 12 against the lower side of the cover plate 1. When the opposite side direction of the square pressure block 12 is misaligned with the long side direction of the locking through hole 8, it is in the locked position; when it is aligned with it, it is in the assembly / disassembly position.

[0030] The protective cover 4 is a detachable partial shielding component. Its lower edge is connected to the support component 3 or the frame-shaped frame 2 by a positioning pin or a buckle. The opening and shielding surface are customized according to the geometric shape of the area to be shielded on the PCB board. The planar shape of the protective cover 4 is selected from at least one of square, circle, L-shape or polygon.

[0031] The cover plate 1 has a first clamping edge 15 on its opposite sides, and the bottom plate 5 has a corresponding second clamping edge 16 on its opposite sides. The first clamping edge 15 and the second clamping edge 16 together limit the PCB board to the middle position between them during the clamping and flipping process.

[0032] The cover plate 1 is provided with two handles 17 on its upper side, which are used by the operator to lift or remove the cover plate 1 from the base plate 5.

[0033] On the side of the base plate 5 facing the PCB board, an elastic pad or elastic gasket is provided along the corresponding area of ​​the support member 3. The elastic pad or elastic gasket is made of silicone or fluororubber and is used to provide surface contact support for the PCB board during clamping and to form a sealant fit against the anti-seepage paint. Several protective covers 4 are also provided on the lower side of the base plate.

[0034] The working principle of this utility model: I. Clamping and Alignment Process Before use, the operator first places the PCB board to be coated with conformal coating on the upper surface of the base plate 5.

[0035] A number of guide posts 6 are pre-set on the base plate 5. The guide posts 6 are frustoconical structures with a smaller top and a larger bottom, and are distributed at unequal intervals.

[0036] Subsequently, cover plate 1 is placed over base plate 5 from above, allowing guide posts 6 to be inserted sequentially into corresponding guide holes 7 on cover plate 1. Because guide posts 6 have a frustum-like guiding function, cover plate 1 automatically completes fine-tuning and positioning during the pressing process, ensuring precise alignment between the two plates. The three unequally spaced guide posts 6 define the assembly direction, preventing operators from incorrectly assembling due to symmetrical orientation, thus achieving unique orientation and error-proof positioning.

[0037] When the cover plate 1 and the base plate 5 are fully attached, the PCB board is sandwiched between the two, and the conductive area or component that needs to be shielded is directly opposite the protective cover 4 installed on the support 3 of the cover plate 1, thus achieving initial shielding and positioning.

[0038] II. Working Principle of Locking and Fixing Mechanism After clamping, the operator rotates multiple rotating buckles 9 set on the base plate 5 so that they pass through the locking through holes 8 on the cover plate 1. Each rotating buckle 9 includes components such as a first bolt 10, a shaft core 11, a square pressure block 12, and a first spring 13.

[0039] In the "assembly position", the opposite side of the square pressure block 12 is aligned with the long side of the locking through hole 8, allowing it to pass smoothly through the hole. After rotating 90°, the opposite side is misaligned with the long side of the hole, and the square pressure block 12 is pressed against the lower side of the cover plate 1 by the first spring 13, forming a mechanical locking force. At this time, the rotating buckle 9 changes from the "assembly position" to the "locking position", achieving a tight connection between the cover plate 1 and the base plate 5.

[0040] With this structure, the cover plate 1 can be quickly locked or removed without tools, maintaining the reliability of clamping while improving operational efficiency.

[0041] III. Working Principle of Shielding, Protection and Sealing Structures When the clamp is locked, the PCB board is reliably fixed between the cover plate 1 and the base plate 5.

[0042] The support member 3 inside the cover plate 1 forms a supporting plane for the protective cover 4. The lower surface of the protective cover 4 is in close contact with a specific area on the PCB board surface to shield conductive ports, pads or components that should not be coated during the painting process.

[0043] The protective cover 4 is installed via positioning pins or clips, and the shielding surface can be square, round, L-shaped, or polygonal to suit different PCB board shapes and component layouts, achieving personalized protection. This structure allows the shielding component to precisely correspond to the shielding area, preventing accidental paint spraying, and can be quickly replaced to adapt to different PCB board models.

[0044] Meanwhile, the base plate 5 has an elastic gasket or pad made of silicone or fluororubber on the side closest to the PCB board. In the clamped state, the elastic gasket forms a surface-contact sealing layer with the PCB board, effectively preventing paint airflow or paint mist from seeping into the gaps and achieving a leak-proof seal. This sealing structure not only improves the masking effect but also prevents contamination of conductive areas after spraying.

[0045] IV. Picking, Placing and Reusing Process After the painting is completed, the operator holds the handle 17 on the cover plate 1 and rotates each rotating buckle 9 counterclockwise to the "assembly position" to release the locking state. Then, the cover plate 1 can be lifted as a whole using the handle 17 to remove the painted PCB board.

[0046] Since the guide post 6 / guide hole 7 alignment structure and the rotating buckle 9 locking structure of the fixture are both reusable designs, and the protective cover 4 can also be flexibly replaced according to production needs, the whole set of fixtures has the characteristics of easy operation, strong reusability and high adaptability, which greatly improves the continuity and economy of painting production.

[0047] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the protection scope of the present utility model.

Claims

1. A fixture for protective components during the application of conformal coating to PCB boards, characterized in that, include: The cover plate consists of a frame-shaped frame and several supporting members located inside the frame-shaped frame. A protective cover is detachably installed on the top of the supporting members. The protective cover is used to shield conductive areas or components on the PCB board that need to be avoided from being sprayed during the application of conformal coating. The base plate is located below the cover plate; The cover plate is disposed opposite to the base plate and is used to clamp the PCB board between the two, so that the protective cover is located directly above the position of the PCB board to be shielded or below the base plate.

2. The clamp according to claim 1, characterized in that, The cover plate includes a frame-shaped border and support members that are fixedly connected to the frame-shaped border and distributed in a crisscross pattern. The support members are used to provide support and positioning reference for the protective cover in the clamping state.

3. The clamp according to claim 1, characterized in that, The upper side of the base plate is provided with several guide posts, and the cover plate is provided with guide holes at positions corresponding to the guide posts. When the cover plate is closed to the base plate, the guide posts are inserted into the guide holes to achieve alignment and guidance.

4. The clamp according to claim 3, characterized in that, The guide post is a frustum-shaped structure with a smaller top and a larger bottom, and the three guide posts are distributed at unequal intervals and cooperate with the corresponding guide holes to form a fault-proof positioning structure with unique direction.

5. The clamp according to claim 1, characterized in that, The cover plate is provided with several rectangular locking through holes, and the base plate is provided with rotating buckles at positions corresponding to each locking through hole. After passing through the locking through hole, the rotating buckles are rotated from the "assembly position" to the "locking position" to fix the cover plate to the base plate.

6. The clamp according to claim 5, characterized in that, The rotary buckle includes a first bolt, a shaft, a square pressure block, and a first spring; The square pressure block has a receiving groove on its upper side, and the first spring is housed in the receiving groove; the first bolt and the shaft core are threaded together and pass through the first spring and the square pressure block in sequence; the lower end of the shaft core is fixed to the base plate by the second bolt; under normal conditions, the first spring presses the square pressure block against the lower side of the cover plate, and when the opposite side of the square pressure block is misaligned with the long side of the locking through hole, it is in the locked position, and when it is aligned with it, it is in the assembly / disassembly position.

7. The clamp according to claim 1, characterized in that, The protective cover is a detachable partial shielding component. Its lower edge is connected to the support component or the frame frame by a positioning pin or buckle. The opening and shielding surface are customized according to the geometric shape of the area to be shielded on the PCB board. The planar shape of the protective cover is selected from at least one of square, circle, L-shape or polygon.

8. The clamp according to claim 1, characterized in that, The cover plate has a first clamping edge on its opposite sides, and the bottom plate has a corresponding second clamping edge on its opposite sides. The first clamping edge and the second clamping edge together limit the PCB board to the middle position between them during clamping and flipping.

9. The clamp according to claim 1, characterized in that, The cover plate is provided with two handles on its upper side, which are used by the operator to lift or remove the cover plate from the base plate.

10. The clamp according to claim 1, characterized in that, The base plate is provided with an elastic strip or elastic pad along the corresponding area of ​​the support member on the side facing the PCB board. The elastic strip or elastic pad is made of silicone or fluororubber and is used to provide surface contact support to the PCB board and form a sealant fit for the anti-seepage paint when clamped. Several protective covers are also provided on the underside of the base plate.

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