Printed circuit board (PCB) with trapezoidal groove

Abstract

The utility model provides a PCB with trapezoidal grooves, which comprises a PCB body, and two opposite sides of the PCB body are respectively provided with a first trapezoidal groove and a second trapezoidal groove. The original V-shaped groove is replaced by the trapezoidal groove, so that the residual thickness of the PCB body can be controlled within an effective range, and the abnormal phenomena that the multi-spliced PCB deforms and is difficult to break off due to too small residual thickness of the PCB, and devices are damaged due to abnormal stress and the like are avoided; and the problem that the multi-jointed board is difficult to split due to overlarge residual thickness of the PCB can be avoided, and mechanical stress damage to a device attached to the position close to the V-shaped groove can be prevented.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of PCB, especially relates to a PCB board with trapezoidal groove. BACKGROUND

[0002] When the patch workshop line produces remote controllers of different models, the P plate is severely deformed, resulting in poor batch printing of the PCB board. When printing, the P plate is not tightly clamped with the track, resulting in abnormal printing.

[0003] The main reasons for the deformation of the P plate include: (1) when cutting the V groove, the cutting is too deep, resulting in insufficient P plate thickness, and the P plate is deformed due to internal stress during baking. (2) The P plate is not standardized in circulation, and the P plate is squeezed during transportation. (3) Before baking the rack, the P plate is not placed in the corresponding card slot, and when the P plate is fixed with screws, the P plate is bent under stress, resulting in deformation of the P plate after baking. The consequences of poor V groove cutting of the PCB board also include difficulty in breaking the plate, and device damage caused by abnormal stress.

[0004] Therefore, a PCB board is needed that can effectively solve the problems of deformation, difficulty in breaking the plate, and device damage caused by abnormal stress due to poor V groove cutting. SUMMARY

[0005] To overcome the problems in the related art, one of the purposes of the utility model is to provide a PCB board with trapezoidal groove, which can effectively solve the problems of deformation, difficulty in breaking the plate, and device damage caused by abnormal stress due to poor V groove cutting.

[0006] A PCB board with trapezoidal groove, comprising a PCB board body, the opposite sides of the PCB board body are respectively provided with a first trapezoidal groove and a second trapezoidal groove.

[0007] The trapezoidal groove replaces the original V groove, which can control the thickness of the PCB board body within an effective range, avoid abnormal phenomena such as deformation of multi-spliced PCB boards, difficulty in breaking the plate, and device damage caused by abnormal stress, and also avoid difficulty in breaking the plate of multi-spliced boards caused by excessive thickness of the PCB board, and prevent mechanical stress damage to the device close to the V groove.

[0008] In the preferred technical scheme of the utility model, the first trapezoidal groove and the second trapezoidal groove are opened on both sides of the length direction of the PCB board body.

[0009] The first trapezoidal groove and the second trapezoidal groove are arranged on both sides of the length direction of the PCB body, the length of the PCB body is s, and the depth is h.

[0010] In the preferable technical scheme of the utility model, one end of the first trapezoidal groove towards the second trapezoidal groove has a first end point and a second end point, and the distance between the first end point and the second end point is L1.

[0011] One end of the first trapezoidal groove towards the second trapezoidal groove has a first end point and a second end point, the first trapezoidal groove and the second trapezoidal groove have a certain distance in the length direction, the second end point is close to the second trapezoidal groove, and the first end point is away from the second trapezoidal groove. The distance between the first end point and the second end point is L1, and the value range of L1 is 100um±20um.

[0012] In the preferable technical scheme of the utility model, one end of the second trapezoidal groove towards the first trapezoidal groove has a third end point and a fourth end point, and the distance between the third end point and the fourth end point is L2.

[0013] The distance between the third end point and the fourth end point is L2, the third end point is close to the first trapezoidal groove, the fourth end point is away from the first trapezoidal groove, and the value range of L2 is 100um±20um.

[0014] In the preferable technical scheme of the utility model, the second end point is located on one side of the first trapezoidal groove close to the second trapezoidal groove, and the first end point is located on one side of the first trapezoidal groove away from the second trapezoidal groove.

[0015] The second end point of the first trapezoidal groove is close to the second trapezoidal groove, and the first end point of the first trapezoidal groove is far away from the second trapezoidal groove.

[0016] In the preferable technical scheme of the utility model, the distance between the second end point and the third end point is X, the depth of the PCB body is h, the distance of the first trapezoidal groove and the second trapezoidal groove in the depth direction is G, the first trapezoidal groove extends Z in the depth direction, and the second trapezoidal groove extends Y in the depth direction.

[0017] The difference between the second end point and the third end point in the length direction is X, and the value range of X is -0.1mm-0.1mm, that is, the second trapezoidal groove is closer to the edge of the PCB body than the first trapezoidal groove, or the second trapezoidal groove is farther away from the edge of the PCB body than the first trapezoidal groove. Controlling the distance between the first trapezoidal groove and the second trapezoidal groove in the length direction to be between -0.1mm-0.1mm can avoid that the deviation in the length direction is too large to cause abnormal plate breaking and cannot play the role of plate separation.

[0018] In the preferable technical scheme of the present application, the angle of the opening of the first trapezoidal groove is a1, and the angle of the opening of the second trapezoidal groove is a2.

[0019] The angle a1 of the opening of the first trapezoidal groove and the angle a2 of the opening of the second trapezoidal groove are both set to be between 25°-45°, which can avoid that the opening angle of the trapezoidal groove is too small to cause insufficient PCB thickness, resulting in difficult plate breaking. On the other hand, it can avoid that the opening angle of the trapezoidal groove is too large to cause excessive PCB thickness, resulting in difficult plate separation.

[0020] In the preferable technical scheme of the present application, one end of the first trapezoidal groove facing the second trapezoidal groove is a plane, and one end of the second trapezoidal groove facing the first trapezoidal groove is a plane.

[0021] The first end point and the second end point of the first trapezoidal groove have the same depth on the PCB body, and the first end point and the second end point are located on the same plane. The third end point and the fourth end point of the second trapezoidal groove have the same depth on the PCB body, and the third end point and the fourth end point are located on the same plane.

[0022] In the preferable technical scheme of the present application, one end of the first trapezoidal groove facing the second trapezoidal groove is an arc surface, and one end of the second trapezoidal groove facing the first trapezoidal groove is an arc surface.

[0023] The arc surface of the first trapezoidal groove protrudes in the direction close to the second trapezoidal groove, and the arc surface of the second trapezoidal groove protrudes in the direction close to the first trapezoidal groove. Setting one end of the first trapezoidal groove facing the second trapezoidal groove as an arc surface can make the bottom of the first trapezoidal groove smoothly transition, which can enhance the stability of the first trapezoidal groove when it is subjected to external stress compared with linear transition. Setting one end of the second trapezoidal groove facing the first trapezoidal groove as an arc surface can make the top of the second trapezoidal groove smoothly transition, which can enhance the stability of the second trapezoidal groove when it is subjected to external stress compared with linear transition.

[0024] In the preferable technical scheme of the present application, one end of the first trapezoidal groove facing the second trapezoidal groove is a plane, and one end of the second trapezoidal groove facing the first trapezoidal groove is an arc surface.

[0025] The one end of the first trapezoidal groove towards the second trapezoidal groove is a plane, and the one end of the second trapezoidal groove towards the first trapezoidal groove is an arc surface. The bottom of the first trapezoidal groove is a plane, and the top of the second trapezoidal groove is an arc surface, so that only one arc surface and one plane need to be machined, without machining two arc surfaces, and the machining difficulty and cost can be reduced. Since the arc surface is smoothly transitioned, stress is not concentrated on one or several points, so that the bottom surface of the first arc groove is machined by using the arc surface process, and the stability of the first trapezoidal groove when subjected to external stress can be enhanced.

[0026] The PCB board with trapezoidal grooves has the advantages that the trapezoidal grooves are used to replace the original V-shaped grooves, the excess thickness of the PCB board body can be controlled within an effective range, abnormal phenomena such as deformation of a multi-spliced PCB board, difficulty in separating the PCB board, and damage of a device caused by abnormal stress can be avoided, and the PCB board can be prevented from being difficult to separate and from causing mechanical stress damage to a device close to the V-shaped groove. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a schematic view of the PCB board with linear trapezoidal grooves of the utility model;

[0028] Figure 2 is a schematic view of the PCB board with arc surface trapezoidal grooves of the utility model;

[0029] Figure 3 is a schematic view of the PCB board with V-shaped grooves of the prior art.

[0030] Reference signs: 1, PCB board body; 2, first trapezoidal groove; 3, second trapezoidal groove; 4, first end point; 5, second end point; 6, third end point; 7, fourth end point; 8, V-shaped groove. DETAILED DESCRIPTION

[0031] Preferred embodiments of the utility model will be described in more detail below with reference to the drawings. Although the preferred embodiments of the utility model are shown in the drawings, it should be understood that the utility model can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the utility model more thorough and complete, and to fully convey the scope of the utility model to those skilled in the art.

[0032] Example 1

[0033] As Figure 1As shown, this embodiment provides a PCB board with a trapezoidal groove, including a PCB board body 1, wherein a first trapezoidal groove 2 and a second trapezoidal groove 3 are respectively provided on two opposite sides of the PCB board body 1.

[0034] The PCB body 1 is rectangular in shape, and the depth of the PCB body is h, which is 0.8 mm, 1.2 mm, 1.6 mm or 2 mm.

[0035] The first trapezoidal groove 2 and the second trapezoidal groove 3 are arranged opposite to each other, and there is a deviation between the first trapezoidal groove 2 and the second trapezoidal groove 3 in the length direction. The bottom of the first trapezoidal groove 2 faces the second trapezoidal groove 3, and the top of the second trapezoidal groove 3 faces the first trapezoidal groove 2.

[0036] The width of the first trapezoidal groove 2 can be equal to the width of the second trapezoidal groove 3, or the width of the first trapezoidal groove 2 can be greater than or less than the width of the second trapezoidal groove 3. The extension of the first trapezoidal groove 2 along the width of the PCB body 1 can be equal to the extension of the second trapezoidal groove 3 along the width of the PCB body 1, or it can be greater than or less than the extension of the second trapezoidal groove 3 along the width of the PCB body 1.

[0037] like Figure 3 As shown, in the prior art, PCB boards all use V-grooves 8, and the angle of the opening of the V-grooves 8 depends on the extension of the V-grooves 8 in the width direction, that is, the depth of the V-grooves 8. When the depth of the V-grooves 8 is fixed, the angle of the opening of the V-grooves 8 cannot be taken into account. When the depth of the V-grooves 8 is small, the angle of the opening of the V-grooves 8 is small. At this time, the excess thickness of the PCB board body 1 in the width direction is sufficient, but the small angle of the opening of the V-grooves 8 will cause insufficient cutting of the V-grooves 8. When the depth of the V-grooves 8 is large, the angle of the opening of the V-grooves 8 is large. At this time, the excess thickness of the PCB board body 1 in the width direction is insufficient, resulting in deformation problems, difficulty in breaking the board, and damage to the device due to abnormal force.

[0038] This embodiment uses a trapezoidal groove instead of the V-groove 8. The bottom of the trapezoidal groove has a certain length, rather than a single point. Therefore, the use of the first trapezoidal groove 2 and the second trapezoidal groove 3 can increase the angle of the groove opening while maintaining the groove depth. This balances the angle and depth of the groove opening, preventing deformation problems caused by poor V-groove cutting, difficulty in separating the board, and damage to components caused by abnormal force. It also avoids the difficulty of separating the PCB board due to excessive excess thickness of the PCB board body 1.

[0039] This embodiment provides a PCB with trapezoidal grooves, comprising a PCB body 1, with a first trapezoidal groove 2 and a second trapezoidal groove 3 provided on opposite sides of the PCB body 1. By replacing the conventional V-shaped grooves 8 with trapezoidal grooves, the excess thickness of the PCB body 1 can be controlled within an effective range, thereby preventing abnormalities such as deformation and difficulty in separating multiple PCBs due to insufficient excess thickness, as well as damage to components caused by abnormal stress. Furthermore, the PCB body can avoid difficulties in separating multiple PCBs due to excessive excess thickness, as well as mechanical stress damage to components mounted near the V-grooves.

[0040] Example 2

[0041] like Figure 1 As shown, this embodiment provides a PCB board with a trapezoidal groove, including a PCB board body 1, wherein a first trapezoidal groove 2 and a second trapezoidal groove 3 are respectively provided on two opposite sides of the PCB board body 1.

[0042] The first trapezoidal groove 2 and the second trapezoidal groove 3 are formed on either side of the length of the PCB body 1. The PCB body 1 has a length s and a depth h. Both the first trapezoidal groove 2 and the second trapezoidal groove 3 are formed along the length of the PCB body 1, thereby reducing the excess thickness G of the PCB body 1 that can support external weight. The excess thickness G of the PCB board is calculated by subtracting the depths of the first trapezoidal groove 2 and the second trapezoidal groove 3 from the width h of the PCB body 1.

[0043] The bottom of the first trapezoidal groove 2 is arranged toward the second trapezoidal groove 3, and the top of the second trapezoidal groove 3 is arranged toward the first trapezoidal groove 2. The end of the first trapezoidal groove 2 facing the second trapezoidal groove 3 has a first endpoint 4 and a second endpoint 5, and the distance between the first endpoint 4 and the second endpoint 5 is L1. The end of the first trapezoidal groove 2 facing the second trapezoidal groove 3 has a first endpoint 4 and a second endpoint 5. The first trapezoidal groove 2 and the second trapezoidal groove 3 are spaced a certain distance apart in the longitudinal direction, with the second endpoint 5 close to the second trapezoidal groove 3 and the first endpoint 4 far from the second trapezoidal groove 3.

[0044] The distance between the first end point 4 and the second end point 5 is L1, and the value range of L1 is 100 μm ± 20 μm. The larger L1 is, the larger the angle a1 of the opening of the first trapezoidal groove 2 is.

[0045] The second trapezoidal groove 3 has a third endpoint 6 and a fourth endpoint 7 on the end facing the first trapezoidal groove 2, with a distance L2 between the third endpoint 6 and the fourth endpoint 7. The second trapezoidal groove has a third endpoint and a fourth endpoint on the end facing the first trapezoidal groove, with a distance L2 between the third endpoint and the fourth endpoint. The third endpoint is close to the first trapezoidal groove, and the fourth endpoint is far from the first trapezoidal groove.

[0046] The distance between the third end point 6 and the fourth end point 7 is L2, and the value range of L2 is 100 um±20 um. The larger L2 is, the larger the angle a2 of the opening of the second trapezoidal groove 3 is. The angle of the opening of the first trapezoidal groove 2 can be the same as or different from the angle of the opening of the second trapezoidal groove 3, which is not limited herein, and the first trapezoidal groove 2 in this embodiment has the same angle of the opening as the second trapezoidal groove 3.

[0047] The PCB field usually adopts multi-puzzle boards for production, and several boards are spliced together for production to improve production efficiency. V-grooves are cut between the boards to distinguish them for subsequent board splitting.

[0048] Replacing the V-groove 8 of the PCB body 1 in the prior art with a trapezoidal groove can take into account the angle of the groove opening and the groove depth, prevent deformation problems, board breaking difficulties and device damage caused by abnormal stress due to poor V-groove cutting, and also avoid board splitting difficulties caused by excessive thickness of the PCB body 1 and mechanical stress damage to devices mounted near the V-groove.

[0049] The width of the end of the first trapezoidal groove 2 close to the second trapezoidal groove 3 and the end of the second trapezoidal groove 3 close to the first trapezoidal groove 2 is in the range of 100 um±20 um, which avoids the situation that the V-groove is cut too deep due to the too thin cutting blade and / or too small cutting angle, resulting in insufficient P-board thickness and board breaking difficulties.

[0050] The end of the first trapezoidal groove towards the second trapezoidal groove has a first end point and a second end point, and the distance between the first end point and the second end point is L1. The end of the second trapezoidal groove towards the first trapezoidal groove has a third end point and a fourth end point, and the distance between the third end point and the fourth end point is L2. The larger L1 is, the larger the angle a1 of the opening of the first trapezoidal groove 2 is. The larger L2 is, the larger the angle a2 of the opening of the second trapezoidal groove 3 is. The width of the end of the first trapezoidal groove 2 close to the second trapezoidal groove 3 and the end of the second trapezoidal groove 3 close to the first trapezoidal groove 2 is in the range of 100 um±20 um, which avoids the situation that the V-groove is cut too deep due to the too thin cutting blade and / or too small cutting angle, resulting in insufficient P-board thickness and board breaking difficulties.

[0051] Embodiment 3

[0052] As shown in Figure 1 The embodiment provides a PCB with a trapezoidal groove, which comprises a PCB body 1, and the PCB body 1 is provided with a first trapezoidal groove 2 and a second trapezoidal groove 3 on opposite sides.

[0053] The first trapezoidal groove 2 and the second trapezoidal groove 3 are arranged on the two sides of the length direction of the PCB body 1.

[0054] The first trapezoidal groove 2 has a first end point 4 and a second end point 5 at one end facing the second trapezoidal groove 3, and the distance between the first end point 4 and the second end point 5 is L1.

[0055] The second trapezoidal groove 3 has a third end point 6 and a fourth end point 7 at one end facing the first trapezoidal groove 2, and the distance between the third end point 6 and the fourth end point 7 is L2.

[0056] The second end point 5 is located on one side of the first trapezoidal groove 2 close to the second trapezoidal groove 3, and the first end point 4 is located on one side of the first trapezoidal groove 2 away from the second trapezoidal groove 3.

[0057] The distance between the second end point 5 and the third end point 6 is X, the depth of the PCB board body 1 is h, the distance between the first trapezoidal groove 2 and the second trapezoidal groove 3 in the depth direction is G; the first trapezoidal groove 2 extends Z in the depth direction, and the second trapezoidal groove 3 extends Y in the depth direction.

[0058] The difference between the second end point 5 and the third end point 6 in the length direction is X, and the value of X is in the range of -0.1mm-0.1mm, that is, the second trapezoidal groove 3 is closer to the edge of the PCB board body 1 than the first trapezoidal groove 2, or the second trapezoidal groove 3 is farther away from the edge of the PCB board body 1 than the first trapezoidal groove 2. Controlling the distance between the first trapezoidal groove and the second trapezoidal groove in the length direction to be between -0.1mm-0.1mm can avoid the abnormality of the plate caused by the excessive deviation in the length direction, and cannot play the role of separating the plate.

[0059] The difference between the depth Z of the first trapezoidal groove 2 and the depth Y of the second trapezoidal groove 3 is in the range of -0.10mm-+0.10mm, which has the technical effect of ensuring that the excess thickness G is centrally arranged. If the excess thickness G is not centrally arranged, it is easy to cause the deformation of the PCB board body 1. By centrally arranging the excess thickness G, the deformation of the PCB board body 1 is avoided. The depth Z of the first trapezoidal groove 2 and the depth Y of the second trapezoidal groove 3 jointly determine the excess thickness G of the PCB board body 1, and the calculation formula of the excess thickness G is G=h-Z-Y.

[0060] The depth h of the PCB board body 1 is 0.8mm, 1.2mm, 1.6mm or 2mm.

[0061] The distance between the second end point 5 and the third end point 6 of the embodiment is X, the depth of the PCB plate body 1 is h, the distance of the first trapezoidal groove 2 and the second trapezoidal groove 3 in the depth direction is G; the first trapezoidal groove 2 extends Z in the depth direction, and the second trapezoidal groove 3 extends Y in the depth direction. The distance between the first trapezoidal groove 2 and the second trapezoidal groove 3 in the length direction is controlled between-0.1mm-0.1mm, which can avoid the abnormality of the plate breaking caused by the too large deviation in the length direction, and cannot play the role of plate separation. The difference between the depth Z of the first trapezoidal groove 2 and the depth Y of the second trapezoidal groove 3 is in the range of-0.10mm-+0.10mm. The excess thickness G is not centered, which is easy to cause the deformation of the PCB plate body 1, and the excess thickness G is centrally arranged to avoid the deformation of the PCB plate body 1.

[0062] Embodiment 4

[0063] As shown in the Figure 1 embodiment, a PCB plate with a trapezoidal groove is provided, which comprises a PCB plate body 1, and the opposite sides of the PCB plate body 1 are respectively provided with a first trapezoidal groove 2 and a second trapezoidal groove 3.

[0064] One end of the first trapezoidal groove 2 towards the second trapezoidal groove 3 has a first end point 4 and a second end point 5, and the distance between the first end point 4 and the second end point 5 is L1.

[0065] One end of the second trapezoidal groove 3 towards the first trapezoidal groove 2 has a third end point 6 and a fourth end point 7, and the distance between the third end point 6 and the fourth end point 7 is L2.

[0066] The angle of the opening of the first trapezoidal groove 2 is a1, and the angle of the opening of the second trapezoidal groove 3 is a2.

[0067] One end of the first trapezoidal groove 2 towards the second trapezoidal groove 3 is a plane, and one end of the second trapezoidal groove 3 towards the first trapezoidal groove 2 is a plane.

[0068] The first end point 4 and the second end point 5 of the first trapezoidal groove 2 have the same depth on the PCB plate body 1, and the first end point 4 and the second end point 5 are located on the same plane. The third end point 6 and the fourth end point 7 of the second trapezoidal groove 3 have the same depth on the PCB plate body 1, and the third end point 6 and the fourth end point 7 are located on the same plane.

[0069] The first trapezoidal groove 2 has two inclined surfaces, which are a first inclined surface and a second inclined surface, the first end point 4 is located on the first inclined surface, the second end point 5 is located on the second inclined surface, and the included angle between the first inclined surface and the second inclined surface is a1.

[0070] The second trapezoidal groove 3 has two inclined surfaces, a third inclined surface and a fourth inclined surface, the third end point 6 is located on the third inclined surface, and the fourth end point 7 is located on the fourth inclined surface, and the included angle between the third inclined surface and the fourth inclined surface is a2.

[0071] The included angle a1 between the first inclined surface and the second inclined surface, and the included angle a2 between the third inclined surface and the fourth inclined surface, both range from 25° to 45°, and in the case that the depth of the first trapezoidal groove 2 is fixed, a1 is positively correlated with the distance L1 between the first end point 4 and the second end point 5, that is, the greater a1 is, the greater L1 is. In the case that the depth of the second trapezoidal groove 3 is fixed, a2 is positively correlated with the distance L2 between the third end point 6 and the fourth end point 7, that is, the greater a2 is, the greater L2 is.

[0072] In the case that the width of the first trapezoidal groove 2, that is, the distance L1 between the first end point 4 and the second end point 5, is fixed, the smaller a1 is, the greater the value of the extension Z of the first trapezoidal groove 2 in the depth direction is. In the case that the width of the second trapezoidal groove 3, that is, the distance L2 between the third end point 6 and the fourth end point 7, is fixed, the smaller a2 is, the greater the value of the extension Y of the second trapezoidal groove 3 in the depth direction is. In the case that both L1 and L2 are fixed, the smaller a1 and / or a2 is, the smaller the excess thickness G of the PCB body 1 is. Both the opening angle a1 of the first trapezoidal groove 2 and the opening angle a2 of the second trapezoidal groove 3 are set to be between 25° and 45°, which can avoid the situation that the opening angle of the trapezoidal groove is too small to cause insufficient PCB thickness, resulting in difficulty in separating the PCB. On the other hand, it can also avoid the situation that the opening angle of the trapezoidal groove is too large to cause excessive PCB thickness, resulting in difficulty in separating the PCB.

[0073] The end of the first trapezoidal groove 2 facing the second trapezoidal groove 3 and the end of the second trapezoidal groove 3 facing the first trapezoidal groove 2 are both flat surfaces, which have low processing difficulty and do not require a large amount of manpower and cost.

[0074] In this embodiment, the opening angle of the first trapezoidal groove 2 is a1, and the opening angle of the second trapezoidal groove 3 is a2. The end of the first trapezoidal groove 2 facing the second trapezoidal groove 3 is a plane, and the end of the second trapezoidal groove 3 facing the first trapezoidal groove 2 is a plane. When the width of the first trapezoidal groove 2, i.e., the distance L1 between the first endpoint 4 and the second endpoint 5, is fixed, the smaller a1 is, the larger the value of the extension Z of the first trapezoidal groove 2 along the depth direction is. When the width of the second trapezoidal groove 3, i.e., the distance L2 between the third endpoint 6 and the fourth endpoint 7, is fixed, the smaller a2 is, the larger the value of the extension Y of the second trapezoidal groove 3 along the depth direction is. When both L1 and L2 are fixed, the smaller a1 and / or a2 is, the smaller the excess thickness G of the PCB board body 1 is. Setting the opening angle a1 of the first trapezoidal groove 2 and the opening angle a2 of the second trapezoidal groove 3 between 25° and 45° can, on the one hand, avoid the situation where the opening angle of the trapezoidal groove is too small, resulting in insufficient excess thickness of the PCB board, which makes it difficult to bend the board. On the other hand, it can prevent the trapezoidal groove from having an opening angle that is too large, which would cause the PCB board to have too much excess and make it difficult to separate the boards.

[0075] Example 5

[0076] This embodiment provides a PCB board with a trapezoidal groove, comprising a PCB board body 1 , wherein a first trapezoidal groove 2 and a second trapezoidal groove 3 are respectively provided on two opposite sides of the PCB board body 1 .

[0077] The first trapezoidal groove 2 and the second trapezoidal groove 3 are provided on both sides of the PCB body 1 in the length direction.

[0078] One end of the first trapezoidal groove 2 facing the second trapezoidal groove 3 has a first endpoint 4 and a second endpoint 5 , and a distance between the first endpoint 4 and the second endpoint 5 is L1 .

[0079] The second trapezoidal groove 3 has a third endpoint 6 and a fourth endpoint 7 at one end facing the first trapezoidal groove 2 , and a distance between the third endpoint 6 and the fourth endpoint 7 is L2 .

[0080] like Figure 2 As shown, one end of the first trapezoidal groove 2 facing the second trapezoidal groove 3 is an arcuate surface, and one end of the second trapezoidal groove 3 facing the first trapezoidal groove 2 is an arcuate surface.

[0081] The arc surface of the first trapezoidal groove 2 protrudes towards the direction close to the second trapezoidal groove 3, and the arc surface of the second trapezoidal groove 3 protrudes towards the direction close to the first trapezoidal groove 2. The end of the first trapezoidal groove 2 towards the second trapezoidal groove 3 is provided with an arc surface, so that the bottom of the first trapezoidal groove 2 can be smoothly transitioned, and compared with linear transition, the stability of the first trapezoidal groove 2 when subjected to external stress can be enhanced. The end of the second trapezoidal groove 3 towards the first trapezoidal groove 2 is provided with an arc surface, so that the top of the second trapezoidal groove 3 can be smoothly transitioned, and compared with linear transition, the stability of the second trapezoidal groove 3 when subjected to external stress can be enhanced.

[0082] The end of the first trapezoidal groove 2 towards the second trapezoidal groove 3 is provided with an arc surface, and the end of the second trapezoidal groove 3 towards the first trapezoidal groove 2 is provided with an arc surface. The end of the first trapezoidal groove 2 towards the second trapezoidal groove 3 is provided with an arc surface, so that the bottom of the first trapezoidal groove 2 can be smoothly transitioned. The end of the second trapezoidal groove 3 towards the first trapezoidal groove 2 is provided with an arc surface, so that the top of the second trapezoidal groove 3 can be smoothly transitioned. In combination with the first trapezoidal groove 2 and the second trapezoidal groove 3, the stability of the entire PCB board body 1 when subjected to external stress can be enhanced.

[0083] Embodiment 6

[0084] The embodiment provides a PCB board with trapezoidal grooves, comprising a PCB board body 1, and first trapezoidal grooves 2 and second trapezoidal grooves 3 are respectively arranged on opposite sides of the PCB board body 1.

[0085] The end of the first trapezoidal groove 2 towards the second trapezoidal groove 3 is a plane, and the end of the second trapezoidal groove 3 towards the first trapezoidal groove 2 is an arc surface.

[0086] The bottom of the first trapezoidal groove 2 is a plane, and the top of the second trapezoidal groove 3 is an arc surface, so that only one arc surface and one plane need to be machined, and two arc surfaces do not need to be machined, which can reduce the machining difficulty and machining cost. Since the arc surface is smoothly transitioned, stress is not concentrated on one or several points, and therefore the bottom of the first trapezoidal groove is machined by using an arc surface machining process, which can enhance the stability of the first trapezoidal groove 2 when subjected to external stress.

[0087] The first trapezoidal groove 2 or the second trapezoidal groove 3 can be machined by using an arc surface machining process according to the external stress that the PCB board body 1 is subjected to in the production process. For example, if one side of the PCB board body 1 where the first trapezoidal groove 2 is located is prone to external stress, the end of the first trapezoidal groove 2 towards the second trapezoidal groove 3 is provided with an arc surface; if one side of the PCB board body 1 where the second trapezoidal groove 3 is located is prone to external stress, the end of the second trapezoidal groove 3 towards the first trapezoidal groove 2 is provided with an arc surface.

[0088] The first trapezoidal groove 2 of the embodiment is flat towards one end of the second trapezoidal groove 3, and the second trapezoidal groove 3 is arc-shaped towards one end of the first trapezoidal groove 2. The bottom of the first trapezoidal groove 2 is flat, and the top of the second trapezoidal groove 3 is arc-shaped, so only one arc-shaped surface and one flat surface need to be machined, without the need to machine two arc-shaped surfaces, which can reduce the machining difficulty and machining cost. Since the arc-shaped surface is smoothly transitioned, stress is not concentrated on one or several points, so the bottom surface of the first arc-shaped groove is machined by using an arc-shaped surface process, which can enhance the stability of the first trapezoidal groove 2 when subjected to external stress.

[0089] The relative arrangement of parts and steps, numerical expressions, and numerical values set forth in the examples are not intended to limit the scope of the present application, unless otherwise specifically stated. In all of the examples shown and discussed herein, any particular numerical value should be interpreted as merely an example, and not as a limitation. Thus, other examples of example embodiments can have different values. It should be noted that like-numbers and letters refer to like items throughout the several views, and as a result, no further discussion regarding such items is required in subsequent views.

[0090] It will be understood that spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device in the figures is inverted, then a part described as "above" or "up" other parts or structures would then be oriented "below" or "down" the other parts or structures. Thus, the example term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. It will be understood that the terms and words used herein are not limited to the meanings typically associated with such terms and words unless otherwise indicated. For example, the term "aluminum" includes aluminum and alloys of aluminum unless otherwise indicated. The terms "connected" and "coupled" are used broadly and encompass both direct and indirect connections and couplings.

[0091] In addition, it should be noted that the use of "first", "second", and the like words to describe various components is merely intended to differentiate one component from another, and the above words do not have special meanings unless otherwise stated. Therefore, it cannot be understood as a limitation on the scope of protection of the present application.

[0092] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A PCB board with a trapezoidal groove, characterized in that: The PCB body comprises a PCB body, wherein two opposite sides of the PCB body are respectively provided with a first trapezoidal groove and a second trapezoidal groove.

2. The PCB board with trapezoidal grooves according to claim 1, wherein: The first trapezoidal groove and the second trapezoidal groove are provided on both sides of the PCB board body in the length direction.

3. The PCB board with trapezoidal grooves according to claim 1, wherein: One end of the first trapezoidal groove facing the second trapezoidal groove has a first endpoint and a second endpoint, and a distance between the first endpoint and the second endpoint is L1.

4. The PCB board with trapezoidal grooves according to claim 3, wherein: The second trapezoidal groove has an end facing the first trapezoidal groove and a third endpoint and a fourth endpoint, and a distance between the third endpoint and the fourth endpoint is L2.

5. The PCB board with trapezoidal grooves according to claim 4, characterized in that: The second endpoint is located on a side of the first trapezoidal groove close to the second trapezoidal groove, and the first endpoint is located on a side of the first trapezoidal groove away from the second trapezoidal groove.

6. The PCB board with trapezoidal grooves according to claim 4, characterized in that: The distance between the second endpoint and the third endpoint is X, the depth of the PCB board body is h, and the distance between the first trapezoidal groove and the second trapezoidal groove in the depth direction is G; the first trapezoidal groove extends Z along the depth direction, and the second trapezoidal groove extends Y along the depth direction.

7. The PCB board with trapezoidal grooves according to claim 1, wherein: The opening angle of the first trapezoidal groove is a1, and the opening angle of the second trapezoidal groove is a2.

8. The PCB board with trapezoidal grooves according to claim 1, wherein: One end of the first trapezoidal groove facing the second trapezoidal groove is a plane, and one end of the second trapezoidal groove facing the first trapezoidal groove is a plane.

9. The PCB board with trapezoidal grooves according to claim 1, wherein: One end of the first trapezoidal groove facing the second trapezoidal groove is an arcuate surface, and one end of the second trapezoidal groove facing the first trapezoidal groove is also an arcuate surface.

10. The PCB board with trapezoidal grooves according to claim 1, wherein: One end of the first trapezoidal groove facing the second trapezoidal groove is a flat surface, and one end of the second trapezoidal groove facing the first trapezoidal groove is an arcuate surface.

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