Printed circuit board
By setting a coaxial pad ring and elastic pad on the printed circuit board, combined with a polytetrafluoroethylene coating, the damage and instability problems when tightening the bolts are solved, and the wear resistance and stability of the circuit board are improved.
Patent Information
- Application Number
- CN202422205560.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-09
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-09-09
AI Technical Summary
When tightening the bolts, existing printed circuit boards are prone to be damaged by excessive twisting, and the bolts are not fixed stably.
Coaxial pad ring and elastic pad are provided at the mounting hole of the printed circuit board. The top surface of the pad ring is fixedly connected to the elastic pad. The elastic pad forms an arc surface and is combined with the polytetrafluoroethylene coating. The elastic pad deforms under bolt extrusion to provide preload force. The pad ring and the plate are embedded in grooves to reduce stress concentration.
Effectively protect the surface of the circuit board from damage, extend the service life, improve stability, prevent bolts from loosening, and remind the operator to avoid excessive tightening through resistance changes.
Smart Images
Figure CN223231376U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of electronic components, and more specifically, to a printed circuit board. Background Art
[0002] A printed circuit board (PCB) is a circuit board that uses copper etching technology. It is generally composed of a multi-layer structure and serves to carry other electronic components. During use, the PCB is generally fixed to the mounting surface with bolts. However, tightening the bolts too much may damage the PCB, while tightening too little can easily cause the PCB to be unstable.
[0003] Therefore, a new solution needs to be proposed to solve this problem. Utility Model Content
[0004] In view of the deficiencies in the prior art, the present invention aims to provide a printed circuit board.
[0005] The above technical purpose of the present utility model is achieved through the following technical solutions: a printed circuit board, including a board body, a plurality of mounting holes are provided on the top surface of the board body, a plurality of gaskets corresponding to the mounting holes are provided on the bottom surface of the board body, the gaskets are coaxially arranged with the corresponding mounting holes, the top surface of the gasket is fixedly connected to an elastic pad, and the top surface of the elastic pad forms an arc surface upward.
[0006] The present invention is further configured as follows: the bottom surface of the elastic pad is recessed upward, and a deformation cavity is formed between the bottom surface of the elastic pad and the bottom surface of the gasket ring.
[0007] The utility model is further configured as follows: the elastic pad is made of translucent material.
[0008] The utility model is further configured as follows: the inner diameter of the gasket and the inner diameter of the elastic gasket are both larger than the diameter of the mounting hole.
[0009] The utility model is further configured as follows: a circular arc transition is formed between the bottom surface of the gasket and the side wall of the gasket.
[0010] The present invention is further configured as follows: a top surface of the plate body is provided with a plurality of embedding grooves corresponding to the gaskets, and the bottom surfaces of the gaskets fit in contact with the bottom surfaces of the embedding grooves.
[0011] To sum up, the utility model has the following beneficial effects: when tightening the bolt, the elastic pad and the washer bear the friction caused by the rotation of the bolt, thereby avoiding damage to the top surface of the plate body, and the wear resistance of the polytetrafluoroethylene coating is combined to improve the service life of the plate body. The elastic pad undergoes elastic deformation when squeezed by the bolt, providing a pre-tightening force in the vertical direction, preventing the bolt from loosening, and ensuring the stability of the plate body. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a cross-sectional view of the utility model;
[0013] Figure 2 for Figure 1 Enlarged view of point A in the middle.
[0014] In the figure: 1, plate body; 2, mounting hole; 3, gasket; 4, elastic pad; 5, deformation cavity; 6, embedding groove. DETAILED DESCRIPTION
[0015] The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
[0016] Embodiment: A printed circuit board, such as Figure 1 、 Figure 2 As shown, it includes a plate body 1, a plurality of mounting holes 2 are provided on the top surface of the plate body 1, and a plurality of gaskets 3 corresponding to the mounting holes 2 are provided on the bottom surface of the plate body 1. The gaskets 3 are coaxially arranged with the corresponding mounting holes 2. The top surface of the gasket 3 is fixedly connected with an elastic gasket 4, and the top surface of the elastic gasket 4 forms an arc surface upward. Specifically, the top surface of the plate body 1 is coated with a polytetrafluoroethylene coating. Four mounting holes 2 are provided on the plate body 1, and each mounting hole 2 corresponds to a gasket 3 and an elastic gasket 4. The gasket 3 is bonded to the plate body 1, and the elastic gasket 4 is bonded to the gasket 3. When tightening the bolt, the elastic gasket 4 and the gasket 3 bear the friction caused by the rotation of the bolt, thereby avoiding damage to the top surface of the plate body 1. Combined with the wear resistance of the polytetrafluoroethylene coating, the service life of the plate body 1 is improved. The elastic gasket 4 undergoes elastic deformation when squeezed by the bolt, providing a pre-tightening force in the vertical direction, preventing the bolt from loosening, and ensuring the stability of the plate body 1.
[0017] like Figure 1 、 Figure 2 As shown, the bottom surface of the elastic pad 4 is recessed upward, and a deformation cavity 5 is formed between the bottom surface of the elastic pad 4 and the bottom surface of the gasket ring 3. The elastic pad 4 is made of translucent material. Specifically, the outer bottom surface of the elastic pad 4 is bonded to the top surface of the gasket ring 3, and the inner edge of the elastic pad 4 is integrally formed with a vertical downward edge. The side wall of the edge fits with the inner wall of the gasket ring 3. The elastic pad 4 is made of translucent vulcanized rubber. When the elastic pad 4 is squeezed, the air in the deformation cavity 5 first flows out from between the side wall of the edge and the inner wall of the gasket ring 3. At this time, the resistance to tightening the bolt is small. When the elastic pad 4 fits the top surface of the gasket ring 3, the resistance increases, reminding the operator. At the same time, because the elastic pad 4 is made of translucent material, as the deformation degree of the elastic pad 4 increases, the opacity of the elastic pad 4 also changes, further reminding the operator to avoid excessive tightening of the bolt and causing damage to the plate body 1.
[0018] like Figure 1 、 Figure 2As shown, the inner diameter of the gasket 3 and the inner diameter of the elastic gasket 4 are both larger than the diameter of the mounting hole 2, and there is an arc transition between the bottom surface of the gasket 3 and the side wall of the gasket 3. The top surface of the plate body 1 is provided with a plurality of embedding grooves 6 corresponding to the gasket 3, and the bottom surface of the gasket 3 fits the bottom surface of the embedding groove 6. Specifically, the inner diameter of the gasket 3 and the inner diameter of the elastic gasket 4 are increased to avoid the gasket 3 or the elastic gasket 4 hindering the bolt from entering the mounting hole 2, reducing the processing accuracy, and processing a fillet at the bottom end of the gasket 3, and the bottom end of the gasket 3 is embedded in the embedding groove 6 to avoid stress concentration at the edge of the gasket 3. At the same time, the contact area between the gasket 3 and the plate body 1 is increased, the connection strength between the two is improved, the pressure between the gasket 3 and the plate body 1 is reduced, and the service life of the plate body 1 is further improved.
[0019] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiment. All technical solutions based on the concept of the present invention are within the scope of protection of the present invention. It should be noted that for those skilled in the art, certain improvements and modifications that do not depart from the principles of the present invention should also be considered within the scope of protection of the present invention.
Claims
1. A printed circuit board, characterized in that: The invention comprises a plate body (1), wherein a plurality of mounting holes (2) are provided on the top surface of the plate body (1), a plurality of gaskets (3) corresponding to the mounting holes (2) are provided on the bottom surface of the plate body (1), the gaskets (3) are coaxially arranged with the corresponding mounting holes (2), the top surface of the gaskets (3) is fixedly connected with an elastic gasket (4), and the top surface of the elastic gasket (4) forms an arc surface upward.
2. The printed circuit board according to claim 1, wherein: The bottom surface of the elastic pad (4) is recessed upward, and a deformation cavity (5) is formed between the bottom surface of the elastic pad (4) and the bottom surface of the gasket ring (3).
3. The printed circuit board according to claim 2, wherein: The elastic pad (4) is made of a translucent material.
4. The printed circuit board according to claim 3, wherein: The inner diameter of the gasket (3) and the inner diameter of the elastic gasket (4) are both larger than the diameter of the mounting hole (2).
5. The printed circuit board according to claim 4, wherein: There is an arc transition between the bottom surface of the gasket (3) and the side wall of the gasket (3).
6. The printed circuit board according to claim 5, wherein: The top surface of the plate body (1) is provided with a plurality of embedding grooves (6) corresponding to the gasket rings (3), and the bottom surface of the gasket ring (3) fits in contact with the bottom surface of the embedding grooves (6).