PCB fixing hole structure

Abstract

The utility model discloses a PCB fixing hole structure, comprising a PCB, the PCB is provided with a bolt fixing hole for a bolt to pass through, a fixing sheet is fixed in the bolt fixing hole, the center of the fixing sheet is provided with a through hole for the bolt to pass through, and the periphery of the fixing sheet relative to the through hole is provided with a plurality of small holes for preventing the bolt from loosening. According to the fixing hole structure, the plurality of small holes are formed in the periphery of the through hole through which the bolt passes, so that the PCB and the shell can be stably connected by the bolt, and an anti-loosening effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of PCB board installation, in particular to a PCB board fixing hole structure. Background Art

[0002] In the process of electronic product design, PCB boards are often used in conjunction with structural parts. At this time, it is necessary to design bolt fixing holes on the PCB board to assemble the PCB board and the housing through the bolt fixing holes. The bolt fixing holes can also be used for grounding tests, etc.

[0003] However, the bolt fixing holes on the PCB in the related art are set as a single ring, and the PCB is fixed to the housing by passing the bolts through the middle of the bolt fixing holes. The bolts of the bolt fixing holes set as a single ring are easily loosened or deformed under repeated use and vibration, thereby affecting the fixing effect. Utility Model Content

[0004] The utility model aims to overcome the deficiencies in the prior art and provide a PCB board fixing hole structure.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A PCB board fixing hole structure comprises: a PCB board, wherein the PCB board is provided with a bolt fixing hole for passing a bolt, a fixing plate is fixed in the bolt fixing hole, a through hole is formed at the center of the fixing plate for passing the bolt, and the fixing plate is provided with a plurality of small holes relative to the periphery of the through hole to prevent the bolt from loosening.

[0007] In one embodiment, a component area is provided in the middle of the PCB board, and there are four bolt fixing holes, which are respectively located near four corners of the PCB board.

[0008] In one embodiment, the diameter of the fixing plate is the same as the diameter of the bolt fixing hole, and the thickness of the fixing plate is consistent with the groove depth of the bolt fixing hole, and the fixing plate is embedded in the bolt fixing hole.

[0009] In one embodiment, the through hole and the fixing plate are arranged in concentric circles, and the diameter of the through hole is 6mm-8mm.

[0010] In one embodiment, the fixing plate is provided with copper plating on the outer surface.

[0011] In one embodiment, the small holes penetrate two opposite sides of the fixing plate, there are eight small holes, and the eight small holes surround the outer periphery of the fixing plate relative to the through hole.

[0012] In one embodiment, the diameter of the small hole is 2mm-3mm.

[0013] In one embodiment, a washer is provided on one side of the fixing plate, the diameter of the washer is the same as the diameter of the fixing plate, the washer abuts against the side of the fixing plate for the bolt to pass through, and a clearance hole is opened in the center of the washer, and the diameter of the clearance hole is the same as that of the through hole.

[0014] In one embodiment, the thickness of the gasket is smaller than the thickness of the fixing plate.

[0015] In one embodiment, the gasket is made of rubber.

[0016] Compared with the prior art, the utility model has at least the following advantages:

[0017] 1. A PCB board fixing hole structure of the utility model is provided with a plurality of small holes on the periphery of the through hole for the bolt to pass through. The plurality of small holes can increase the contact area between the bolt and the fixing plate, and the bolt is not easy to be deformed or broken under repeated use and vibration. The small holes can also allow the bolt to firmly connect the PCB board and the housing, thereby improving the connection firmness and preventing it from loosening and falling off easily.

[0018] 2. A PCB board fixing hole structure of the utility model is provided with a washer abutting against one side of a fixing plate for passing a bolt, so as to play a buffering role when the bolt contacts the fixing plate, and can prevent the bolt from loosening when fixing the PCB board and the housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments are briefly introduced below.

[0020] Figure 1 A structural schematic diagram of a PCB board fixing hole structure provided by the utility model;

[0021] Figure 2 for Figure 1 A magnified schematic diagram of part A;

[0022] Figure 3 The utility model provides a schematic diagram of a partial sectional structure of a side view of a gasket installed in a fixing hole structure of a PCB board.

[0023] Description of the drawings: 10, PCB board; 20, component area; 30, bolt fixing hole; 40, fixing plate; 41, through hole; 42, small hole; 50, gasket; 51, clearance hole. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings.

[0025] A PCB board fixing hole structure, refer to Figure 1 , including a PCB board 10, a component area 20 is arranged in the middle of the PCB board 10. The PCB board 10 is provided with bolt fixing holes 30 for bolts to pass through, and there are four bolt fixing holes 30, which are respectively located near the four corners of the PCB board 10, and the four bolt fixing holes 30 are at a certain distance from the component area 20 so that the component area 20 will not be affected when being fixed.

[0026] Reference Figure 1 and Figure 2 The bolt fixing hole 30 is a circular hole, and a fixing plate 40 is fixed in the bolt fixing hole 30. The fixing plate 40 is arranged in a circular ring, and a through hole 41 for the bolt to pass through is formed at the center of the fixing plate 40. The through hole 41 and the fixing plate 40 are arranged in a concentric circle. The diameter of the fixing plate 40 is the same as the diameter of the bolt fixing hole 30. The fixing plate 40 is fixed in the bolt fixing hole 30, and the thickness of the fixing plate 40 is consistent with the groove depth of the bolt fixing hole 30, so that the fixing plate 40 can be embedded in the bolt fixing hole 30. When it is necessary to assemble and fix the PCB board 10 with the housing, a bolt is passed through the through hole 41 on one side of the PCB board 10, and the PCB board 10 is fixed to the housing.

[0027] Further, refer to Figure 1 and Figure 2 The diameter of the perforation 41 is 6 mm-8 mm.

[0028] Further, refer to Figure 1 and Figure 2 The fixing plate 40 is provided with copper on the outer surface, and metal copper is laid on both outer sides of the fixing plate 40 , thereby enhancing the stability of the fixing plate 40 .

[0029] Reference Figure 1 and Figure 2 The fixing plate 40 is provided with a plurality of small holes 42 at the periphery of the through hole 41 . The plurality of small holes 42 are evenly distributed along the periphery of the through hole 41 , and the small holes 42 penetrate two opposite sides of the fixing plate 40 .

[0030] Reference Figure 1 and Figure 2There are eight small holes 42, which surround the outer periphery of the fixing plate 40 relative to the through hole 41. The design of the small holes 42 can increase the contact area between the bolt and the fixing plate 40, thereby dispersing the stress of the connection part, and the bolt is not easy to deform or break under repeated use and vibration, thereby improving its durability. The small holes 42 can also allow the bolt to firmly connect the PCB board 10 and the housing, improving the connection firmness. Even under a large range of vibration or force, the screw or bolt and the object can be firmly connected together without loosening and falling off, reducing the maintenance and replacement frequency of the equipment.

[0031] Further, refer to Figure 1 and Figure 2 The diameter of the small hole 42 is 2mm-3mm.

[0032] Reference Figure 3 A washer 50 is disposed on one side of the fixing plate 40. The diameter of the washer 50 is the same as that of the fixing plate 40. The washer 50 abuts against the side of the fixing plate 40 for the bolt to pass through. The washer 50 is arranged in a circular ring shape. A clearance hole 51 is opened in the center of the washer 50. The clearance hole 51 has the same diameter as that of the through hole 41.

[0033] Further, refer to Figure 3 The thickness of the washer 50 is less than that of the fixing plate 40, and the number of the washers 50 can be increased or decreased according to actual needs. The washer 50 is made of rubber material, and is used to play a buffering role when the bolt contacts the fixing plate 40, and can prevent the bolt from loosening when fixing the PCB board 10 and the housing.

[0034] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A PCB board fixing hole structure, characterized in that: include: A PCB board (10) is provided with a bolt fixing hole (30) for a bolt to pass through, a fixing plate (40) is fixed in the bolt fixing hole (30), a through hole (41) for the bolt to pass through is formed at the center of the fixing plate (40), and a plurality of small holes (42) for preventing the bolt from loosening are provided on the periphery of the through hole (41) of the fixing plate (40).

2. A PCB board fixing hole structure according to claim 1, characterized in that: A component area (20) is provided in the middle of the PCB board (10), and there are four bolt fixing holes (30), which are respectively located near four corners of the PCB board (10).

3. A PCB board fixing hole structure according to claim 2, characterized in that: The diameter of the fixing plate (40) is the same as the diameter of the bolt fixing hole (30), and the thickness of the fixing plate (40) is consistent with the groove depth of the bolt fixing hole (30). The fixing plate (40) is embedded in the bolt fixing hole (30).

4. A PCB board fixing hole structure according to claim 3, characterized in that: The through hole (41) and the fixing plate (40) are arranged in a concentric circle, and the diameter of the through hole (41) is 6 mm-8 mm.

5. A PCB board fixing hole structure according to claim 4, characterized in that: The fixing plate (40) is provided with copper-plated outer surface.

6. A PCB board fixing hole structure according to claim 4, characterized in that: The small holes (42) penetrate two opposite sides of the fixing plate (40), and there are eight small holes (42). The eight small holes (42) surround the periphery of the fixing plate (40) relative to the through hole (41).

7. A PCB board fixing hole structure according to claim 6, characterized in that: The diameter of the small hole (42) is 2 mm to 3 mm.

8. A PCB board fixing hole structure according to claim 7, characterized in that: A washer (50) is provided on one side of the fixing plate (40), the diameter of the washer (50) being the same as the diameter of the fixing plate (40), the washer (50) being in contact with a side of the fixing plate (40) for the bolt to pass through, a clearance hole (51) being provided at the center of the washer (50), the clearance hole (51) being the same as the diameter of the through hole (41).

9. A PCB board fixing hole structure according to claim 8, characterized in that: The thickness of the gasket (50) is smaller than the thickness of the fixing plate (40).

10. A PCB board fixing hole structure according to claim 9, characterized in that: The gasket (50) is made of rubber material.

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