CN210247135U

CN210247135U - PCB notch structure with stress release notch

Info

Publication number: CN210247135U
Application number: CN201920571760.6U
Authority: CN
Inventors: Shanliang Liao; 廖善良; Honglun He; 何宏伦; Liangtian Bian; 卞良田; Jianchun Chen; 陈建春; Guosheng Han; 韩国胜
Original assignee: Changzhou Jitian Electronic Co ltd
Current assignee: Changzhou Jitian Electronic Co ltd
Priority date: 2019-04-24
Filing date: 2019-04-24
Publication date: 2020-04-03
Anticipated expiration: 2029-04-24

Abstract

The utility model relates to a take PCB notch structure of stress release breach, including the PCB board, be provided with a plurality of pin holes at PCB board surface symmetry, position between the pin hole is provided with fixed notch, the longitudinal axis of fixed notch is located the symmetry axis between the pin hole, fixed slotted hole is formed through punching press processing, be provided with annular stress slotted hole A on the both ends of fixed notch, be provided with a plurality of groups annular stress slotted hole B that correspond with the pin hole in the middle part of fixed notch, the annular circular of stress slotted hole A is located the tip of fixed notch axis, the centre of a circle of stress slotted hole B is located the intersection position of the line between the pin hole of mutual symmetry and fixed notch longitudinal axis; the utility model discloses set up a plurality of stress slotted hole A and stress slotted hole B in traditional fixed notch position for the material that leads to between pin hole and the fixed notch is difficult to receive stress extrusion, and then is difficult to produce the white limit.

Description

PCB notch structure with stress release notch

Technical Field

The utility model relates to a take PCB notch structure of stress release breach belongs to PCB diaphragm orifice open structure field.

Background

For some multipath inductors, in order to prevent mutual interference between inductors, a metal shielding plate is generally required to be arranged between the inductors; the fixing position of the metal shielding plate is generally to process a strip notch on the PCB directly by stamping so as to realize the clamping and fixing of the metal shielding plate; however, when the notch is machined, the notch is close to the pin hole of the inductor, so that when the notch is machined, a white edge is easily generated between the notch and the pin hole due to the extrusion stress of the stamping knife, the strength of the PCB part with the white edge is seriously crossed, the fixed strength of the inductor is seriously influenced, and even a crack is easily generated at the white edge position to influence the normal work of the PCB.

Disclosure of the invention

The technical problems to be solved by the present invention are: the technical problem that white edges are easily generated at the edges of induction pin holes of a PCB in the prior art is solved, and the PCB notch structure with the stress release notch is provided.

The technical proposal adopted by the utility model/invention for solving the technical problem is as follows:

the utility model provides a take PCB notch structure of stress release breach, includes the PCB board, is provided with a plurality of pin holes at PCB board surface symmetry, and the position between the pin hole is provided with fixed notch, and the longitudinal axis of fixed notch is located the symmetry axis between the pin hole, and fixed slotted hole forms its characterized in that through stamping process: annular stress slotted holes A are formed in the two end portions of the fixed notch, a plurality of groups of annular stress slotted holes B corresponding to the pin holes are formed in the middle of the fixed notch, the annular circle of each stress slotted hole A is located at the end portion of the axis of the fixed notch, and the circle center of each stress slotted hole B is located at the intersection position of the connecting line between the pin holes which are symmetrical to each other and the longitudinal axis of the fixed notch; the diameters of the stress slot A and the stress slot B are Z, the width of the fixed notch is Y, wherein 2X = Z-Y, and X is less than or equal to 0.025 m.

As a further improvement, the middle position of the longitudinal axis of the fixed notch is provided with a stress slotted hole C, the center of the stress slotted hole C is located at the middle point of the longitudinal axis of the fixed notch, and the diameter of the stress slotted hole C is also Z.

As a further improvement, the distance between the edge of the pin hole and the side of the fixing notch is H, H less than or equal to Y, and greater than or equal to 0.

As a further improvement, the pin holes are provided with an elliptical conductive contact surface, and the elliptical center of the conductive contact surface is located at the center of the pin holes.

As a further improvement of the utility model, the stress slot A and the stress slot B are formed by drilling.

The utility model/invention has the advantages that:

1. the utility model discloses a plurality of stress slotted hole A and stress slotted hole B have been set up in traditional fixed notch position for fixed notch is difficult to extrude fixed notch inner wall in forming process and later stage shield plate installation, makes the material that leads to between pin hole and the fixed notch be difficult to receive stress extrusion, and then is difficult to produce the white limit.

2. The stress slot C provides certain deformation space and stress release space for later-stage shielding plate installation, and ensures that the PCB is not easy to be stressed and extruded.

3. The fixed notch is not easy to be too large, and the too large stress notch can generate too large extrusion stress in the stamping process, so that the edge material of the pin hole is directly cracked.

Drawings

The present invention will be further described with reference to the accompanying drawings and examples.

FIG. 1 is a schematic structural view of the present invention;

in the figure: 1. a PCB board; 2. a conductive contact surface; 3. a pin hole; 4. a stress slot A; 5. a fixed notch; 6. a stress slot C; 7. a stress slot B;

z is the radius of the stress slot A, the stress slot B and the stress slot C;

y is the width of the fixed notch;

X:Z-Y;

and H, fixing the distance between the edge of the notch and the edge of the pin hole.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic drawings and illustrate the basic structure of the present invention only in a schematic manner, and thus show only the constitution related to the present invention.

As shown in fig. 1, the utility model relates to a take PCB notch structure of stress release breach, including the PCB board, be provided with a plurality of pin holes at PCB board surface symmetry, be provided with oval electrically conductive contact surface on the position in pin hole, the oval centre of a circle of electrically conductive contact surface is located the centre of a circle in pin hole, and position between the pin hole is provided with fixed notch, and the longitudinal axis of fixed notch is located the symmetry axis between the pin hole, and fixed notch is formed through stamping process, its characterized in that: annular stress slotted holes A are formed in the two end portions of the fixed notch, a plurality of groups of annular stress slotted holes B corresponding to the pin holes are formed in the middle of the fixed notch, the annular circle of each stress slotted hole A is located at the end portion of the axis of the fixed notch, and the circle center of each stress slotted hole B is located at the intersection position of the connecting line between the pin holes which are symmetrical to each other and the longitudinal axis of the fixed notch; a stress slotted hole C is also formed in the middle of the longitudinal axis of the fixed notch, and the circle center of the stress slotted hole C is located at the midpoint of the longitudinal axis of the fixed notch; the diameters of the stress slot A, the stress slot B and the stress slot C are Z, the width of the fixed notch is Y, wherein 2X = Z-Y, and X is less than or equal to 0.025 m; the stress slot A, the stress slot B and the stress slot C are formed by drilling; the fixing notch is not suitable to be too wide, the distance from the side edge of the fixing notch to the edge of the pin hole is H, and H is smaller than or equal to Y and larger than or equal to 0.

When the structure is manufactured, firstly, pin holes are processed on a PCB by a PCB drilling machine and a copper deposition process, then, the positions among the pin holes are used for processing the positions of fixed notches, and a stress slotted hole A, a stress slotted hole B and a stress slotted hole C are processed by drilling; fixed notch is processed through the punching machine afterwards, because stress slotted hole A and stress slotted hole B have been processed at relevant position in advance, so the punching press sword can not produce the extrusion to relevant position, the probability that the white limit produced between pin hole and the fixed notch has been reduced, the possibility that fixed notch tip produced crack and white limit has been reduced, simultaneously in later stage installation, stress slotted hole C and stress slotted hole A's cooperation, further pack into fixed notch in-process for the shield plate, stress to fixed notch extrusion bring provides the release space.

In light of the foregoing description of the preferred embodiments of the present invention, it is to be understood that various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a take PCB notch structure of stress release breach, includes the PCB board, is provided with a plurality of pin holes at PCB board surface symmetry, and the position between the pin hole is provided with fixed notch, and the longitudinal axis of fixed notch is located the symmetry axis between the pin hole, and fixed slotted hole forms its characterized in that through stamping process: annular stress slotted holes A are formed in the two end portions of the fixed notch, a plurality of groups of annular stress slotted holes B corresponding to the pin holes are formed in the middle of the fixed notch, the annular circle of each stress slotted hole A is located at the end portion of the axis of the fixed notch, and the circle center of each stress slotted hole B is located at the intersection position of the connecting line between the pin holes which are symmetrical to each other and the longitudinal axis of the fixed notch; the diameters of the stress slot A and the stress slot B are Z, the width of the fixed notch is Y, wherein 2X = Z-Y, and X is less than or equal to 0.025 m.

2. The PCB notch structure with stress relief notch of claim 1, wherein: and a stress slotted hole C is also arranged in the middle of the longitudinal axis of the fixed notch, the circle center of the stress slotted hole C is positioned at the midpoint of the longitudinal axis of the fixed notch, and the diameter of the stress slotted hole C is Z.

3. The PCB notch structure with stress relief notch of claim 1, wherein: the distance between the side edge of the fixed notch and the edge of the pin hole is H, and H is smaller than or equal to Y and larger than or equal to 0.

4. The PCB notch structure with stress relief notch of claim 1, wherein: an elliptical conductive contact surface is arranged at the position of the pin hole, and the center of the ellipse of the conductive contact surface is positioned on the center of the pin hole.