CN210202166U

CN210202166U - PCB capable of avoiding layer deviation based on rivet structure

Info

Publication number: CN210202166U
Application number: CN201822154287.XU
Authority: CN
Inventors: Xiangfu Zeng; 曾祥福; Jian Cheng; 程剑; Chaofeng Xie; 谢超峰
Original assignee: Xiang Science And Technology Circuit Board Co Ltd Of Daya Gulf Section Of Huizhou City
Current assignee: Xiang Science And Technology Circuit Board Co Ltd Of Daya Gulf Section Of Huizhou City
Priority date: 2018-12-21
Filing date: 2018-12-21
Publication date: 2020-03-27
Anticipated expiration: 2028-12-21

Abstract

The utility model relates to a PCB board based on rivet structure for avoiding layer deviation, which comprises a core board body, wherein the core board body comprises a functional unit and a frame surrounding the functional edge, the frame comprises two relatively arranged long edges and two relatively arranged short edges, and rivet holes are respectively arranged on the long edges and the short edges; three rivet holes are formed in the long edge, and two rivet holes are formed in the short edge. The utility model discloses can effectively avoid the core body to produce the inclined to one side phenomenon in layer at the pressfitting in-process, and applicable pressfitting in the more core of the number of piles.

Description

PCB capable of avoiding layer deviation based on rivet structure

Technical Field

The utility model relates to a PCB field, in particular to avoid inclined to one side PCB board on layer based on rivet structure.

Background

Pcb (printed Circuit board), which is called printed Circuit board in chinese, is an important electronic component, is a support for electronic components, and is a carrier for electrical connection of electronic components. It is called a "printed" circuit board because it is made using electronic printing.

After the electronic equipment adopts the printed board, because of the consistency of the printed boards of the same type, the error of manual wiring is avoided, the automatic insertion or mounting, the automatic tin soldering and the automatic detection of electronic components can be realized, the quality of the electronic equipment is ensured, the labor productivity is improved, the cost is reduced, and the maintenance is convenient.

At present, the number of layers of the PCB is more and more, and the layers are scrapped due to the displacement of the PCB core board in the pressing process. The existing pressing process is as follows: brown oxidation → pre-stack → fusion → typesetting → hot pressing → cold pressing → plate splitting → edge milling. However, only by fusion, the requirement of the alignment degree between at most 4 layers of boards can be met, and for products with 6 layers or more and multi-layer boards with 2 or more core boards in the inner layer, the core boards are easy to run.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a PCB based on a rivet structure for avoiding layer deviation, which includes a core board body, and rivet holes are formed at the peripheral edge of the core board body.

When carrying out the pressfitting with polylith core plate body, use rivet fastening to replace the fusion process, wherein, stack polylith core plate body together and align the back, because the position of the rivet on every core plate body is unanimous, consequently the rivet hole on it also can align after the core plate body aligns, then use dedicated rivet equipment to insert the rivet in the rivet hole with the rivet, thereby rivet polylith core plate body together, make each core plate body reciprocal anchorage, thereby make the core plate body can not produce the off normal at the pressfitting in-process, thereby avoid the core plate body to appear the condemned phenomenon of layer partially in the pressfitting in-process.

Preferably, the rivet hole has a diameter of 4.5 mm.

Further, the core plate body comprises a functional unit and a frame surrounding the functional edge, the frame comprises two opposite long sides and two opposite short sides, and rivet holes are formed in the long sides and the short sides.

Preferably, the side walls of the upper end and the lower end of the rivet hole are both inclined outwards to form an expanded portion.

The extension part with the inclined wall can ensure that when a rivet with the diameter consistent with that of the rivet hole is inserted into the rivet hole under the condition that the core plate body is dislocated, the end part of the rivet does not touch the surface of the core plate body but contacts with the inclined wall of the extension part; meanwhile, due to the existence of the inclined wall, in the process of inserting the rivet, the thrust of the rivet acts on the inclined wall of the expansion part, the core plate body which is staggered can be corrected, and the effect of removing the deviation of the PCB layer is achieved.

Furthermore, three rivet holes are formed in the long edge, and two rivet holes are formed in the short edge.

At least two rivet holes are formed in the short edges or the long edges, so that the stability between the core plate bodies when the rivet structure is used for fixing the plurality of core plate bodies is guaranteed, the core plate bodies are prevented from deflecting in the pressing process, and meanwhile, the core plate bodies can be prevented from deviating due to the fact that one rivet loses effect.

Furthermore, the centers of the rivet holes on the long sides are located on the same straight line, the hole pitch of the rivet holes is 100-120mm, and the center of the rivet hole located in the middle is coincident with the center of the long side.

Furthermore, the centers of the rivet holes on the short sides are located on the same straight line, and the hole pitch of the rivet holes is 100-120mm, wherein the two rivet holes are symmetrical with respect to the center of the long sides.

The uniformly distributed rivet holes enable the acting force of the rivets received by the core plate body to be uniformly distributed, and the core plate body is prevented from being broken in the pressing process due to uneven stress of the core plate body.

Further, the distance between the rivet hole and the functional unit is not less than 4.5 mm.

The distance between the rivet hole and the functional unit is more than or equal to 4.5mm, so that the functional unit at the middle part of the core plate body can not be damaged in the rivet fixing and pressing processes.

The principle and effect of the present invention will be further explained by combining the above technical solutions:

the utility model discloses when carrying out the pressfitting with polylith core plate body, use fix with rivet to replace the fusion process, use dedicated rivet equipment to insert the rivet in the rivet hole with the rivet to be in the same place polylith core plate body riveting, make each core plate body reciprocal anchorage, thereby make the core plate body can not produce the off normal at the pressfitting in-process, thereby avoid the core plate body to appear the layer phenomenon of scrapping on the contrary at the pressfitting in-process, and riveting stable in structure, applicable pressfitting in the more core plate body of the number of piles.

Drawings

Fig. 1 is a schematic structural diagram of a PCB board for avoiding layer deviation based on a rivet structure according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional structure view of the PCB board for avoiding layer deviation based on the rivet structure according to the embodiment of the present invention.

Description of reference numerals:

11-functional unit, 121-long side, 122-short side, 2-rivet hole, 21-expanded portion, 211-inclined wall.

Detailed Description

To facilitate understanding of those skilled in the art, the present invention will be described in further detail with reference to the accompanying drawings and examples:

referring to fig. 1, the PCB for avoiding layer deviation based on the rivet structure comprises a core board body, wherein rivet holes 2 are formed in the peripheral edge of the core board body.

When carrying out the pressfitting with polylith core plate body, use rivet fastening to replace the fusion process, wherein, stack polylith core plate body together and align the back, because the position of the rivet on every core plate body is unanimous, consequently rivet hole 2 on it also can align after the core plate body aligns, then use dedicated rivet equipment to insert the rivet in rivet hole 2, thereby rivet polylith core plate body together, make each core plate body reciprocal anchorage together, thereby make the core plate body can not produce the off normal at the pressfitting in-process, thereby avoid the core plate body to appear the scrapped phenomenon of layer partially in the pressfitting in-process.

In one embodiment, the diameter of the rivet hole 2 is 4.5 mm.

In one embodiment, the core board body includes a functional unit 11 and a frame surrounding the functional edge, the frame includes two opposite long sides 121 and two opposite short sides 122, and the long sides 121 and the short sides 122 are both provided with rivet holes 2.

In one embodiment, the sidewalls of the rivet hole 2 at both the upper and lower ends are inclined outwardly to form an expanded portion 21.

The extension portion 21 having the inclined wall 211 can ensure that when a rivet having a diameter identical to that of the rivet hole 2 is inserted into the rivet hole 2 in the case where the core body is misaligned, the end of the rivet does not contact the surface of the core body but contacts the inclined wall 211 of the extension portion 21; meanwhile, due to the existence of the inclined wall 211, in the process of inserting the rivet, the thrust of the rivet acts on the inclined wall 211 of the expansion part 21, the staggered core plate body can be corrected, and the effect of removing the deviation of the PCB plate layer is achieved.

In one embodiment, two of the long sides 121 and one of the short sides 122 are provided with rivet holes 2, and the other short side 122 is not provided with a rivet hole, so that the core board body has a positioning function, and if the core board body is placed reversely during stacking, the rivet holes 2 on the short sides cannot be aligned.

In one embodiment, three rivet holes 2 are disposed on the long side 121, and two rivet holes 2 are disposed on the short side 122.

At least two rivet holes 2 are formed in the short edge 122 or the long edge 121, so that the stability of the core plate bodies when the rivet structure is used for fixing a plurality of core plate bodies is guaranteed, the core plate bodies are prevented from deflecting in the pressing process, and meanwhile, the core plate bodies can be prevented from deviating due to the fact that one rivet loses effect.

In one embodiment, the centers of the rivet holes 2 on the long side 121 are located on the same straight line, and the hole pitch of the rivet holes 2 is 100 mm and 120mm, wherein the center of the rivet hole 2 located in the middle coincides with the center of the long side 121.

In one embodiment, the centers of the rivet holes 2 on the short side 122 are located on the same straight line, and the hole pitch of the rivet holes 2 is 100 mm and 120mm, wherein the two rivet holes 2 are symmetrical with respect to the center of the long side 121.

The uniformly distributed rivet holes 2 enable the acting force of the rivets received by the core plate body to be uniformly distributed, and the core plate body is prevented from being broken in the pressing process due to uneven stress of the core plate body.

In one embodiment, the distance from the rivet hole 2 to the functional unit 11 is not less than 4.5 mm.

The distance between the rivet hole 2 and the functional unit 11 is more than or equal to 4.5mm, so that the functional unit 11 in the middle of the core plate body can be prevented from being damaged in the rivet fixing and pressing processes.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. The utility model provides an avoid inclined to one side PCB board in layer based on rivet structure, includes the core body, its characterized in that, the edge has seted up the rivet hole all around of core body.

2. The rivet structure-based PCB avoiding layer deviation according to claim 1, wherein the diameter of the rivet hole is 4.5 mm.

3. The PCB board avoiding layer deviation based on the rivet structure as claimed in claim 1 or 2, wherein the core board body comprises a functional unit and a frame arranged around the functional edge, the frame comprises two opposite long sides and two opposite short sides, and rivet holes are formed in the long sides and the short sides.

4. The rivet structure-based PCB avoiding layer deviation according to claim 1 or 2, wherein the sidewalls of the upper end and the lower end of the rivet hole are both inclined outwards to form an expanded portion.

5. The PCB board for avoiding layer deviation based on the rivet structure as claimed in claim 3, wherein three rivet holes are opened on the long side, and two rivet holes are opened on the short side.

6. The PCB board for avoiding layer deviation based on the rivet structure as claimed in claim 5, wherein the centers of the rivet holes on the long sides are located on the same straight line, and the hole pitch of the rivet holes is 100 mm and 120mm, wherein the center of the rivet hole located in the middle is coincident with the center of the long side.

7. The PCB board for avoiding layer deviation based on the rivet structure as claimed in claim 5, wherein centers of the rivet holes on the short sides are located on the same straight line, and the hole pitch of the rivet holes is 100 mm and 120mm, wherein two of the rivet holes are symmetrical about the center of the long sides.

8. The PCB board avoiding layer deviation based on the rivet structure as claimed in claim 3, wherein the distance of the rivet hole from the functional unit is not less than 4.5 mm.