PCB press-fit sealing structure

Abstract

The utility model discloses a PCB press-fit sealing structure, and relates to the technical field of PCB sealing. A limiting groove is formed in the top of a PCB, positioning holes communicated with the limiting groove are formed in the two ends of the PCB, the positioning holes completely penetrate through the PCB, a limiting plate is in limiting connection with the limiting groove, a sealing ring is fixedly connected to the top of the limiting plate, positioning columns are fixedly connected to the two ends of the limiting plate, threaded holes are formed in the positioning columns, and the threaded holes are communicated with the limiting groove. The threaded rod is in threaded connection in the threaded hole, and the bottom end of the threaded rod is fixedly connected with a cover plate; the sealing structure has the beneficial effects that when the sealant is melted, the limiting plate and the sealing ring do not directly loosen and deviate on the PCB, the sealing protection effect of the sealing ring on the PCB is guaranteed, the cover plate further seals the positioning hole, the melted sealant is prevented from flowing out of the positioning hole, meanwhile, the sealing effect of the cover plate on the positioning hole is enhanced through the rotating ring, and the sealing effect of the sealing ring on the PCB is improved. When the sealant is melted and completely loses efficacy, the cover plate ensures that the sealing ring and the limiting plate are not loosened on the PCB.

Description

Technical Field

[0001] The utility model belongs to the field of PCB board sealing, and in particular relates to a PCB board pressing sealing structure. Background Art

[0002] PCB board refers to printed circuit board, which is a plate-like substrate that connects electronic components based on conductive paths. PCB board is mainly used to support and connect electronic components such as integrated circuits, resistors, capacitors, etc. to form a complete circuit system.

[0003] In the prior art, a sealing ring is used to seal the PCB board. A sealant is applied to the surface of the sealing area of ​​the PCB board. A prefabricated sealing ring is placed on the sealing area of ​​the PCB board. Then, a pressing machine compacts the sealing ring. The sealing ring protects the PCB board.

[0004] However, when the PCB board works in a high temperature environment for a long time, the heat of the PCB board is not discharged in time, which causes the sealant to begin to melt. The melted sealant causes the sealing ring to adhere loosely to the PCB board, thereby affecting the protective effect of the sealing ring. Utility Model Content

[0005] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model proposes a PCB board pressing and sealing structure, which solves the problem that when the PCB board works in a high temperature environment for a long time, the heat of the PCB board is not discharged in time, which causes the sealant to begin to melt, and the melted sealant causes the sealing ring to be loosely adhered to the PCB board, thereby affecting the protective effect of the sealing ring.

[0006] To achieve the above-mentioned purpose, according to an embodiment of the first aspect of the utility model, a PCB board pressing and sealing structure is provided, comprising:

[0007] A PCB board, wherein a limiting groove is formed on the top of the PCB board, and positioning holes are formed at both ends of the PCB board and are interconnected with the limiting groove, and the positioning holes completely penetrate the PCB board;

[0008] A limit plate, wherein the limit plate is limit-connected to the limit groove, a sealing ring is fixedly connected to the top of the limit plate, and positioning columns are fixedly connected to both ends of the limit plate, and threaded holes are opened inside the positioning columns; and

[0009] The threaded rod is threadedly connected in the threaded hole, and the bottom end of the threaded rod is fixedly connected with a cover plate.

[0010] As a further solution of the utility model: a plurality of hemispherical bodies are fixedly connected to the bottom end of the limiting plate in a direction parallel to the sealing ring, a plurality of hemispherical grooves are opened in the limiting groove in a direction parallel to the PCB board, and the hemispherical bodies are limitedly connected to the hemispherical grooves.

[0011] As a further solution of the utility model: a control groove is opened at the central bottom end of the cover plate, a circular rotating ring is fixedly connected to the top end of the cover plate, and a rotating groove is opened at the bottom of the PCB board around the edge of the cover plate.

[0012] As a further solution of the utility model: the rotating ring is rotatably connected in the rotating groove.

[0013] As a further solution of the utility model: the positioning column is sleeve-connected with the positioning hole.

[0014] As a further solution of the utility model: the limiting plate is in a ring shape, the area of ​​the limiting plate is smaller than the area of ​​the sealing ring and the sealing ring completely covers the top of the limiting plate.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The area of ​​the limit plate is smaller than that of the sealing ring and the sealing ring completely covers the top of the limit plate. The sealing ring can seal the gap between the limit plate and the limit groove. At the same time, the sealing ring can prevent the melted sealant from flowing out of the sealing ring. The positioning column is sleeved and connected with the positioning hole. The positioning hole positions the positioning column. Two groups of positioning holes are opened on the PCB board to ensure the balance when the positioning effect of the positioning hole is transmitted to the limit plate. The hemispherical body and the hemispherical groove increase the contact area between the limit plate and the limit groove. When the sealant in the hemispherical groove begins to melt, the sealant will not flow to the limit groove, thereby avoiding the loss of sealant in the hemispherical groove. On the other hand, the hemispherical groove and the hemispherical body strengthen the limiting connection between the limit plate and the limit groove. Therefore, when the sealant melts, the limit plate and the sealing ring will not loosen or deviate directly on the PCB board, thereby ensuring the sealing and protective effect of the sealing ring on the PCB board.

[0017] 2. The cover plate further seals the positioning hole to prevent the melted sealant from flowing out of the positioning hole. At the same time, the rotating ring strengthens the sealing effect of the cover plate on the positioning hole. When the sealant melts and fails completely, the cover plate ensures that the sealing ring and the limit plate will not loosen on the PCB board. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is a diagram showing the overall structure of the utility model;

[0020] Figure 3 It is the AA cross-sectional view of the overall structure of the utility model;

[0021] Figure 4 For the utility model Figure 3A schematic diagram of the structure at A;

[0022] Figure 5 This is a schematic diagram of the PCB board structure of the utility model;

[0023] Figure 6 This is a schematic diagram of the limit plate structure of the utility model;

[0024] Figure 7 This is a schematic diagram of the cover structure of the utility model.

[0025] Illustration: 1. PCB board; 2. Sealing ring; 3. Limit plate; 4. Positioning column; 5. Threaded rod; 6. Rotating ring; 7. Cover plate; 8. Rotating groove; 9. Threaded hole; 10. Positioning hole; 11. Limit groove; 12. Hemispherical groove; 13. Hemispherical body; 14. Control groove. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely in conjunction with the embodiments below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of them. Based on the embodiments of 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.

[0027] like Figures 1 to 7 As shown, a PCB board pressing and sealing structure comprises: a PCB board 1, a limiting plate 3 and a threaded rod 5,

[0028] A limiting groove 11 is provided on the top of the PCB board 1, and positioning holes 10 are provided at both ends of the PCB board 1 and are interconnected with the limiting groove 11, and the positioning holes 10 completely penetrate the PCB board 1, and a sealant is first applied to the surface of the limiting groove 11, and the limiting groove 11 is connected with the limiting plate 3 in a limiting manner, and the sealant further enhances the stability of the limiting plate 3; and further includes:

[0029] The limiting plate 3 is limitedly connected with the limiting groove 11, the sealing ring 2 is fixedly connected with the top of the limiting plate 3, and the two ends of the limiting plate 3 are fixedly connected with the positioning columns 4, and the positioning columns 4 are provided with threaded holes 9 inside. When the limiting plate 3 is pressed into the limiting groove 11, the sealing ring 2 is also pressed onto the top of the PCB board 1; and

[0030] The threaded rod 5 is threadedly connected in the threaded hole 9, and the bottom end of the threaded rod 5 is fixedly connected with a cover plate 7. The threaded rod 5 is threadedly fixed to the positioning column 4. The fixing effect of the threaded rod 5 on the positioning column 4 is transmitted to the limit plate 3, further enhancing the stability of the limit plate 3. When the sealant melts, the limit plate 3 is prevented from loosening, thereby ensuring the protective effect of the sealing ring 2 on the PCB board 1.

[0031] In some specific implementation schemes, a plurality of hemispherical bodies 13 are fixedly connected to the bottom end of the limiting plate 3 in a direction parallel to the sealing ring 2, and a plurality of hemispherical grooves 12 are opened in the limiting groove 11 in a direction parallel to the PCB board 1. The hemispherical bodies 13 are limitedly connected to the hemispherical grooves 12. The hemispherical bodies 13 and the hemispherical grooves 12 increase the contact area between the limiting plate 3 and the limiting groove 11. When the sealant in the hemispherical grooves 12 begins to melt, the sealant will not flow to the limiting grooves 11, thereby preventing the sealant from being lost in the hemispherical grooves 12. On the other hand, the hemispherical grooves 12 and the hemispherical bodies 13 strengthen the limiting connection between the limiting plate 3 and the limiting grooves 11.

[0032] In some specific implementation schemes, a control groove 14 is opened at the central bottom end of the cover plate 7, a circular ring 6 is fixedly connected to the top of the cover plate 7, and a rotation groove 8 is opened around the edge of the cover plate 7 at the bottom of the PCB board 1. The control groove 14 facilitates the rotation of the cover plate 7, and the cover plate 7 is rotated to install the threaded rod 5 in the threaded hole 9.

[0033] In some specific embodiments, the rotating ring 6 is rotatably connected in the rotating groove 8. When the cover plate 7 rotates, the rotating ring 6 is driven to rotate in the rotating groove 8. The cover plate 7 further seals the positioning hole 10 to prevent the melted sealant from flowing out of the positioning hole 10. At the same time, the rotating ring 6 strengthens the sealing effect of the cover plate 7 on the positioning hole 10.

[0034] In some specific implementation schemes, the positioning column 4 is sleeve-connected with the positioning hole 10, and the positioning hole 10 positions the positioning column 4. Two groups of positioning holes 10 are opened on the PCB board 1, thereby ensuring the balance when the positioning effect of the positioning holes 10 is transmitted to the limit plate 3.

[0035] In some specific embodiments, the limiting plate 3 is ring-shaped, the area of ​​the limiting plate 3 is smaller than the area of ​​the sealing ring 2 and the sealing ring 2 completely covers the top of the limiting plate 3, the sealing ring 2 can seal the gap between the limiting plate 3 and the limiting groove 11, and at the same time, the sealing ring 2 can prevent the melted sealant from flowing out of the sealing ring 2.

[0036] In order for those skilled in the art to better understand the working principle of the embodiments of the present invention, the following is an explanation in conjunction with specific application scenarios:

[0037] Apply sealant on the limiting groove 11, and at the same time, apply sealant to the hemispherical groove 12, put the prefabricated limiting plate 3 into the limiting groove 11, and the hemispherical body 13 on the limiting plate 3 is held in the hemispherical groove 12. At the same time, the positioning column 4 on the limiting plate 3 is inserted into the positioning hole 10, and the limiting plate 3 places the sealing ring 2 on the PCB board 1, and uses the pressing machine in the prior art to press, and the sealing ring 2 and the limiting plate 3 are pressed on the PCB board 1. The limiting plate 3 is ring-shaped, and the area of ​​the limiting plate 3 is smaller than the area of ​​the sealing ring 2 and the sealing ring 2 completely covers the top of the limiting plate 3. The sealing ring 2 can seal the gap between the limiting plate 3 and the limiting groove 11. At the same time, the sealing ring 2 can prevent the melted sealant from flowing out of the sealing ring 2, and the positioning column 4 and The positioning holes 10 are sleeve-connected, and the positioning holes 10 position the positioning posts 4. Two groups of positioning holes 10 are provided on the PCB board 1, thereby ensuring the balance when the positioning effect of the positioning holes 10 is transmitted to the limiting plate 3. The hemispherical body 13 and the hemispherical groove 12 increase the contact area between the limiting plate 3 and the limiting groove 11. When the sealant in the hemispherical groove 12 begins to melt, the sealant will not flow to the limiting groove 11, thereby avoiding the loss of the sealant in the hemispherical groove 12. On the other hand, the hemispherical groove 12 and the hemispherical body 13 strengthen the limiting connection between the limiting plate 3 and the limiting groove 11. Therefore, when the sealant melts, the limiting plate 3 and the sealing ring 2 will not be loosened or offset directly on the PCB board 1, thereby ensuring the sealing and protective effect of the sealing ring 2 on the PCB board 1.

[0038] After the sealing ring 2 and the limiting plate 3 are pressed and sealed on the PCB board 1, the control groove 14 is controlled to rotate the cover plate 7. The cover plate 7 rotates to install the threaded rod 5 in the threaded hole 9. When the cover plate 7 rotates, the rotating ring 6 is driven to rotate in the rotating groove 8. The cover plate 7 further seals the positioning hole 10 to prevent the melted sealant from flowing out of the positioning hole 10. At the same time, the rotating ring 6 strengthens the sealing effect of the cover plate 7 on the positioning hole 10. When the sealant melts and fails completely, the cover plate 7 ensures that the sealing ring 2 and the limiting plate 3 will not loosen on the PCB board 1.

[0039] The above embodiments are only used to illustrate the technical method of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical method of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the utility model.

Claims

1. A PCB board pressing and sealing structure, characterized in that: include: A PCB board (1), wherein a limiting groove (11) is provided on the top of the PCB board (1), and positioning holes (10) which are interconnected with the limiting groove (11) are provided at both ends of the PCB board (1), and the positioning holes (10) completely penetrate the PCB board (1); A limiting plate (3), the limiting plate (3) is connected to the limiting groove (11), a sealing ring (2) is fixedly connected to the top of the limiting plate (3), and positioning columns (4) are fixedly connected to both ends of the limiting plate (3), and a threaded hole (9) is provided inside the positioning column (4); and A threaded rod (5) is threadedly connected to the threaded hole (9), and a cover plate (7) is fixedly connected to the bottom end of the threaded rod (5).

2. A PCB board pressing and sealing structure according to claim 1, characterized in that: The bottom end of the limiting plate (3) is fixedly connected to a plurality of hemispherical bodies (13) in a direction parallel to the sealing ring (2); a plurality of hemispherical grooves (12) are provided in the limiting groove (11) in a direction parallel to the PCB board (1); and the hemispherical bodies (13) are limit-connected to the hemispherical grooves (12).

3. A PCB board pressing and sealing structure according to claim 1, characterized in that: A control groove (14) is provided at the central bottom end of the cover plate (7), a circular rotating ring (6) is fixedly connected to the top end of the cover plate (7), and a rotating groove (8) is provided at the bottom of the PCB board (1) around the edge of the cover plate (7).

4. A PCB board pressing and sealing structure according to claim 3, characterized in that: The rotating ring (6) is rotatably connected in the rotating groove (8).

5. The PCB board pressing and sealing structure according to claim 1, characterized in that: The positioning column (4) is sleeve-connected with the positioning hole (10).

6. A PCB board pressing and sealing structure according to claim 1, characterized in that: The limiting plate (3) is in a ring shape, the area of ​​the limiting plate (3) is smaller than the area of ​​the sealing ring (2), and the sealing ring (2) completely covers the top of the limiting plate (3).

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