JP2017017089A - 3D printed circuit board - Google Patents

Abstract

Provided is a three-dimensional printed circuit board in which defective connection due to stress concentration and defective product due to wrong insertion direction are suppressed. A first printed circuit board has a central through hole and end through holes on both sides on one side and the other side in the extending direction of the central through hole. The second printed circuit board 20 includes a central convex portion 21 and end convex portions 22 a and 22 b on both one side and the other side in the extending direction of the central convex portion 21. The central convex portion 21 is inserted into the central through hole 11, and the plurality of end convex portions 22a and 22b are inserted into the plurality of end through holes 12a and 12b, respectively. The end pads 24 a and 24 b formed on each of the plurality of end protrusions 22 a and 22 b are larger than the center pad 23 formed on the center protrusion 21. The end convex portions 22 a and 22 b are asymmetric with respect to the central convex portion 21, and the end through holes 12 a and 12 b are asymmetric with respect to the central through hole 11. [Selection] Figure 4

Description

  The present invention relates to a three-dimensional printed circuit board, and more particularly to a three-dimensional printed circuit board in which a plurality of printed circuit boards are electrically and mechanically connected.

  A so-called three-dimensional printed circuit board that is connected to a part of a plurality of printed circuit boards so that the other part intersects has the following configuration. For example, in Japanese Patent Application Laid-Open No. 2012-129491 (Patent Document 1) and Japanese Patent Application Laid-Open No. 2013-58586 (Patent Document 2), a second printed circuit board is fitted into a through hole formed in the first printed circuit board. And the structure by which the pads formed in each of them were connected by solder was disclosed.

JP 2012-129491 A JP 2013-58586 A

  In the above configuration, when vibration or external force is applied to each printed circuit board, stress is concentrated particularly on the end part in the extending direction of the through hole in the region of the second printed circuit board inserted into the through hole. To do. For this reason, cracks may occur in the solder as the connection portion of the first and second printed circuit boards, and a connection failure may occur between them.

  In the above configuration, when the second printed circuit board is inserted into the first printed circuit board, the second printed circuit board can be inserted regardless of the orientation of the front and back of the second printed circuit board. It may cause defects.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a three-dimensional printed circuit board in which defective connection due to stress concentration and defective products due to incorrect insertion direction are suppressed. is there.

  The three-dimensional printed circuit board of the present invention includes a first printed circuit board and a second printed circuit board. The first printed circuit board includes a central through hole, and an end through hole formed at least one at a distance from each other on one side and the other side opposite to the one side in the extending direction of the central through hole. Have The second printed circuit board includes a central convex portion and end convex portions that are formed at least one at a distance from each other on one side and the other side opposite to the one side in the extending direction of the central convex portion. Have A central convex portion is inserted into the central through hole, and each of the plurality of end convex portions is inserted into each of the plurality of end through holes. The end pad formed on each of the plurality of end protrusions is larger than the center pad formed on the center protrusion. A central through hole pad and an end through hole pad connected to the central pad and the end pad by solder are formed on the outer periphery of the central through hole and the end through hole. The end convex portion is asymmetric with respect to the central convex portion, and the end through hole is asymmetric with respect to the central through hole.

  According to the present invention, since the end pad is formed larger than the center pad, the resistance due to external stress can be greatly improved, and the occurrence of cracks in the solder connected to the end pad can be suppressed. Further, since the end convex portion is asymmetric with respect to the central convex portion and the end through hole is asymmetric with respect to the central through hole, the possibility of erroneous insertion of the second printed circuit board can be eliminated. .

It is the schematic perspective view which looked at the three-dimensional printed circuit board of this Embodiment from the front side and the upper left side. It is the schematic perspective view which looked at the three-dimensional printed circuit board of this Embodiment from the back side and the lower right side. It is a schematic enlarged view which shows an example of the aspect of the solder connection part shown in FIG. In order to show the characteristics of the first and second printed circuit boards constituting the three-dimensional printed circuit board of Embodiment 1, these printed circuit boards are schematic perspective views as seen from the front side and the upper left side. In order to show the characteristics of the first and second printed circuit boards constituting the three-dimensional printed circuit board of Embodiment 1, these printed circuit boards are schematic perspective views as seen from the back side and from the lower right side. In order to show the characteristics of the first and second printed circuit boards constituting the three-dimensional printed circuit board of Embodiment 2, these printed circuit boards are schematic perspective views as seen from the front side and the upper left side. In order to show the characteristics of the first and second printed circuit boards constituting the three-dimensional printed circuit board of Embodiment 2, these printed circuit boards are schematic perspective views as seen from the back side and the lower right side. FIG. 5 is a schematic perspective view of the first and second printed circuit boards constituting the three-dimensional printed circuit board of Embodiment 3 as viewed from the front side and the upper left side of these printed circuit boards. In order to show the characteristics of the first and second printed circuit boards constituting the three-dimensional printed circuit board of Embodiment 3, these printed circuit boards are schematic perspective views as seen from the back side and the lower right side. FIG. 6 is a schematic perspective view of the first and second printed circuit boards constituting the three-dimensional printed circuit board of Embodiment 4 as viewed from the front side and the upper left side of these printed circuit boards. In order to show the characteristics of the first and second printed circuit boards constituting the three-dimensional printed circuit board of Embodiment 4, these printed circuit boards are schematic perspective views as seen from the back side and from the lower right side. In order to show the characteristics of the first and second printed circuit boards constituting the three-dimensional printed circuit board of Embodiment 5, these printed circuit boards are schematic perspective views as seen from the back side and from the lower right side. It is a schematic enlarged view which shows an example of the aspect of the solder connection part when it sees from the direction XIII shown by the arrow in FIG. 12, and shows the flow of the solder supplied at the time of a connection process. In order to show the characteristics of the first and second printed circuit boards constituting the three-dimensional printed circuit board of Embodiment 6, these printed circuit boards are schematic perspective views as seen from the back side and the lower right side. FIG. 16 is a schematic perspective view of the first and second printed circuit boards constituting the three-dimensional printed circuit board of Embodiment 7 as viewed from the front side and the upper left side of these printed circuit boards. In order to show the characteristics of the first and second printed circuit boards constituting the three-dimensional printed circuit board of Embodiment 7, these printed circuit boards are schematic perspective views as seen from the back side and from the lower right side.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Embodiment 1)
First, the configuration of the three-dimensional printed circuit board according to the present embodiment will be described with reference to FIGS.

  With reference to FIG. 1 and FIG. 2, the three-dimensional printed circuit board 100 according to the present embodiment includes a first printed circuit board 10 and a second printed circuit board 20. The first printed circuit board 10 is a rectangular flat plate member having one main surface 10a and the other main surface 10b facing the one main surface 10a. The second printed circuit board 20 is a rectangular flat plate member having one main surface 20a and the other main surface 20b opposite to the one main surface 20a.

  A central through hole 11 penetrating from one main surface 10a to the other main surface 10b is formed in the central portion of the first printed circuit board 10 in plan view. The central through hole 11 has, for example, a rectangular planar shape extending in the direction along the left-right direction in FIGS. 1 and 2. The first printed circuit board 10 has one end through hole 12a on one side (the left side in FIG. 1 and the right side in FIG. 2) in the extending direction of the central through hole 11 in the extending direction of the central through hole 11. On the other side opposite to the one side (the right side in FIG. 1 and the left side in FIG. 2), the other end through holes 12b are respectively formed. One end through-hole 12 a is formed on the one side of the central through-hole 11 and spaced from the central through-hole 11. Similarly, the other end through-hole 12 b is formed on the other side of the central through-hole 11 and spaced from the central through-hole 11.

  A part of one side below the side of FIG. 1 and FIG. 2 in FIG. 1 and FIG. 2 in the plan view of the second printed board 20 (particularly the central part in the extending direction of the side) A central convex portion 21 is formed. On the lower side, one end convex portion 22a is provided on one side (the left side in FIG. 1 and the right side in FIG. 2) with respect to the direction in which the central convex portion 21 extends (the direction in which the central convex portion 21 is formed). However, the other end convex portion 22b is formed on the other side (the right side in FIG. 1 and the left side in FIG. 2) opposite to the one side in the extending direction of the central convex portion 21, respectively. One end convex portion 22 a is formed on the one side of the central convex portion 21 so as to be spaced from the central convex portion 21. Similarly, the other end convex portion 22 b is formed on the other side of the central convex portion 21 with a space from the central convex portion 21. A cutout is formed in the lower side of the second printed circuit board 20 in FIG. 1 and FIG. 2, and the gap between the central convex portion 21 and the end convex portions 22 a and 22 b is formed by this cutout.

  The length in which the central convex portion 21 extends along one side of the second printed circuit board 20 is relatively close to the length in which the central through hole 11 extends. Further, the length of the one end convex portion 22a in the direction along the extending direction of the central convex portion 21 is relatively close to the length in the direction along the extending direction of the central through hole 11 of the one end portion through hole 12a. That's it. The length of the other end convex portion 22b in the direction along the direction in which the central convex portion 21 extends is a length relatively close to the length in the direction along the direction in which the central through hole 11 in the other end through hole 12b extends. It is. Further, the distance between the central convex portion 21 and the end convex portions 22a and 22b is a distance relatively close to the distance between the central through hole 11 and the end through holes 12a and 12b.

  For this reason, the center convex portion 21 is inserted into the central through hole 11, the one end convex portion 22a is inserted into one end through hole 12a, and the other end convex portion 22b is inserted into the other end through hole 12b. Has been. Specifically, the second printed circuit board 20 is inserted so as to partially fit from one main surface 10a side (the upper side in FIG. 1) of the first printed circuit board 10, and as a result, Both the main surfaces 10a of the printed circuit board 10 and the one main surface 20a of the second printed circuit board 20 are fitted to each other so as to intersect each other (for example, orthogonal).

  Here, a plurality of central pads 23 are formed on the central convex portion 21 of the second printed circuit board 20 at intervals. Similarly, a plurality of (for example, eight) central pads 23 are formed on both the main surface 20a and the other main surface 20b of the central convex portion 21 so as to be spaced from each other in the extending direction of the central convex portion 21. Has been.

  In addition, one end pad 24 a is formed on one end protrusion 22 a of the second printed circuit board 20. One end pad 24a is similarly formed on both the one main surface 20a and the other main surface 20b in one end convex portion 22a. Similarly, the other end pad 24 b is formed on the other end protrusion 22 b of the second printed circuit board 20. Similarly, one end pad 24b is formed on each of the main surface 20a and the other main surface 20b of the other end convex portion 22b.

  Referring to FIGS. 2 and 3, a plurality of first printed circuit boards 10, particularly on the other main surface 10 b (on the lower surface of FIG. 3), Central through-hole pads 13 are formed at intervals. A plurality of central through-hole pads 13 are spaced apart from each other with respect to the direction in which the central through-hole 11 extends, for example around each of the pair of longitudinally extending portions of the central through-hole 11 on the other main surface 10b (for example, 8 One by one).

  Further, one end through-hole pad 14a is formed on the outer periphery of one end through-hole 12a on the other main surface 10b of the first printed circuit board 10. One end through-hole pad 14a is formed one by one around each of a pair of one end through-hole 12a extending in the same direction as a pair of central through-holes 11 extending in the longitudinal direction. Has been. Similarly, the other end through hole pad 14b is formed on the outer periphery of the other end through hole 12b on the other main surface 10b of the first printed circuit board 10. The other end through-hole pad 14b is formed one by one around each of the pair of other end through-holes 12b extending in the same direction as the pair of central through-holes 11 extending in the longitudinal direction. Has been.

  As described above, the plurality of central through-hole pads 13 are arranged at positions close to the plurality of central pads 23 in a state where the first printed circuit board 10 and the second printed circuit board 20 are fitted to each other. That is, each of the plurality of center through-hole pads 13 and each of the plurality of center pads 23 are arranged so that the positions in the extending direction of the center through-hole 11 and the like are substantially equal. Similarly, in the state where the two substrates are fitted to each other, one end through-hole pad 14a and one end pad 24a, and the other end through-hole pad 14b and the other end pad 24b. Are arranged at positions close to each other.

  In this state, each of the plurality of central through-hole pads 13 is connected to each of the plurality of central pads 23 by solder 25 on both the one main surface 20a side and the other main surface 20b side. Similarly, on both the one main surface 20a side and the other main surface 20b side, one end through-hole pad 14a is one end pad 24a and the other end through-hole pad 14b is the other end. The pads 24 b and the solder 25 are connected to each other. In FIG. 3, as an example, the other end through-hole pad 14b is connected to the other end pad 24b and the solder 25, but the other end (for example, the central through-hole pad 13 and the like) The connection mode (with the center pad 23) is basically the same as in FIG.

  Although not shown, various circuit elements such as capacitors, resistors, and diodes are mounted on, for example, a region of one main surface 10a and one main surface 20a. For example, the circuit element on one main surface 10a is electrically connected to the central through hole pad 13 of the first printed circuit board 10 by a conductor pattern (not shown) on the one main surface 10a or in the first printed circuit board 10. It is connected. Similarly, the circuit element on one main surface 20a is electrically connected to the center pad 23 of the second printed circuit board 20 by a conductor pattern (not shown) on the one main surface 20a or in the second printed circuit board 20. It is connected. Therefore, the central through-hole pad 13 and the central pad 23 are connected by the solder 25 as described above, whereby the various circuit elements of the first printed circuit board 10 and the various circuit elements of the second printed circuit board 20 are mutually connected. Electrically connected.

  Further, by connecting with the solder 25 as described above, the first printed circuit board 10 and the second printed circuit board 20 are mechanically connected and fixed to each other. Here, the bottom surface of the notch (notched bottom surface 26) as the distance between the central convex portion 21 and the end convex portions 22a and 22b of the second printed circuit board 20 is the first printed circuit board of the second printed circuit board 20. 10 is brought into contact with the first main surface 10a. For this reason, both are fixed so that the main surface of the 1st printed circuit board 10 and the main surface of the 2nd printed circuit board 20 may cross | intersect (orthogonally) with the solder 25 stably. Thereby, the depth by which the center convex part 21 etc. should be inserted with respect to the center through-hole 11 etc. is adjusted.

  With reference to FIG. 4 and FIG. 5, the first printed circuit board 10 and the second printed circuit board 20 constituting the three-dimensional printed circuit board 100 of the present embodiment have the following characteristics. First, each of the one end pad 24a and the other end pad 24b formed on each of the one end convex part 22a and the other end convex part 22b is formed in each central part formed on the central convex part 21. The size in plan view is larger than that of the pad 23.

  Specifically, the dimension a2 of one end pad 24a in the same direction is larger than the dimension c1 of each central pad 23 in the extending direction of the central protrusion 21. Further, the dimension b2 of the other end pad 24b in the same direction is larger than the dimension c1. The center pad 23, the one end pad 24a, and the other end pad 24b have substantially the same dimensions in the vertical direction of FIG. 4 and FIG. 5 (the direction intersecting the extending direction of the central convex portion 21). Therefore, it can be said that the end pads 24 a and 24 b have a larger area than the center pad 23.

  As a result, each of the one end through hole pad 14a connected to the one end pad 24a and the other end through hole pad 14b connected to the other end pad 24b is connected to the center pad 23. The size in plan view is larger than the individual central through-hole pads 13. The dimensions of the one end through-hole pad 14a, the other end through-hole pad 14b, and the central through-hole pad 23 in the above direction are substantially the same as the pads to which they are connected, and are a2, b2, and c1, respectively. ing. Similarly to the above, since the dimensions in the (depth) direction intersecting with the above-described direction are almost equal to each other, the end through-hole pads 14a and 14b can be said to have a larger area than the central through-hole pad 13.

  Here, also in each of the following embodiments, as described above, basically, the dimension in the extending direction of the central convex portion 21 or the central through hole 11 of each pad is proportional to the area of each pad. In addition, the dimensions in the direction intersecting the extending direction of the central through hole 11 between the through holes are almost equal, and the size of each through hole in the extending direction of the central through hole 11 is proportional to the area of each through hole in plan view. It shall be.

  Next, in the first printed circuit board 10, one end through hole 12 a and the other end through hole 12 b are asymmetric with respect to the central through hole 11. The convex portion 22 a and the other end convex portion 22 b are asymmetric with respect to the central convex portion 21. This will be described below.

  Specifically, a center line CL that passes through the center portion in the extending direction of the central through hole 11 of the first printed circuit board 10 and a center line that passes through the center portion in the extending direction of the center convex portion 21 of the second printed circuit board 20. Consider CL. That is, both the central through hole 11 and the central convex portion 21 are symmetric with respect to the central line CL.

  In the second printed circuit board 20, one end convex portion 22a has a dimension a2 that is substantially the same as the one end pad 24a in the extending direction of the central convex portion 21, and the other end convex portion 22b. Has the same dimension b2 as the other end pad 24b. Here, b2 is larger than a2.

  If the value of the dimension a2 is not equal to the value of the dimension b2, the size of the one end protrusion 22a is different from the size of the other end protrusion 22b with respect to the central protrusion 21. . For this reason, one end convex portion 22 a and the other end convex portion 22 b are asymmetric with respect to the center line CL of the central convex portion 21. Thus, each of the pair of end protrusions 22a and 22b is asymmetric with respect to the center line CL. Here, the fact that it is asymmetric with respect to the center line CL of the central convex portion 21 will be expressed as being asymmetric with respect to the central convex portion 21.

  Next, in the first printed circuit board 10, one end through hole 12a has a dimension in the direction in which the central through hole 11 extends, and the other end through hole 12b has a dimension in the above direction. b1. Here, b1 is larger than a1.

  If the value of the dimension a1 is not equal to the value of the dimension b1, the size of one end through hole 12a is different from the size of the other end through hole 12b with respect to the central through hole 11. . For this reason, one end through hole 12 a and the other end through hole 12 b are asymmetric with respect to the center line CL of the central through hole 11. In this way, each of the pair of end through holes 12a and 12b is asymmetric with respect to the center line CL. Here, the fact that it is asymmetric with respect to the center line CL of the central through hole 11 will be expressed as being asymmetric with respect to the central through hole 11.

  In the present embodiment, the distance d1 (with respect to the direction in which the central through hole 11 extends) between the central through hole 11 and the one end through hole 12a in the first printed circuit board 10, the central through hole 11 and the other through hole. The distance d2 from the end through hole 12b may be equal to or different from each other. Similarly, in the present embodiment, the distance d3 (with respect to the extending direction of the central convex portion 21) between the central convex portion 21 and the one end convex portion 22a in the second printed circuit board 20, and the central convex portion 21 The distance d4 to the other end convex portion 22b may be equal to or different from each other.

Next, the effect of this Embodiment is demonstrated.
When forming the three-dimensional printed circuit board 100 of the present embodiment, first, the first printed circuit board 10 and the second printed circuit board 20 are assembled with the solder 25 in a state where the first printed circuit board 10 and the second printed circuit board 20 are fitted to each other. Connected as a unit. At this time, if the worker in the assembly process erroneously contacts the second printed circuit board 20 during the fitting operation of the second printed circuit board 20 to the first printed circuit board 10, the second printed circuit board 20 In some cases, vibration or the like is applied to the substrate 20. In addition, vibration or the like may be applied to the second printed circuit board 20 during conveyance after the second printed circuit board 20 is fitted to the first printed circuit board 10. Due to such vibration, a large stress may be concentrated on the solder 25 connecting the two printed circuit boards 20.

  As described above, since the central pad 23 of the central convex portion 21 is electrically connected to various circuit elements of the second printed circuit board 20, the connection portion by the solder 25 between the central pad 23 and the central through-hole pad 13 is This is an important part where reliability is particularly required.

  In the present embodiment, the second printed circuit board 20 includes a central convex portion 21, one end convex portion 22a, and the other end convex portion 22b. In addition to the solder 25 that connects the central pad 23 and the central through-hole pad 13, the solder 25 that connects one end pad 24a and one end through-hole pad 14a, and the other end pad 24b and the other The solder 25 that connects the end through-hole pad 14 b connects the first printed board 10 and the second printed board 20.

  Thereby, the stress applied to the solder 25 connecting the center pad 23 and the center through hole pad 13 is the solder 25 connecting the one end pad 24a and the one end through hole pad 14a, and the other end. It is relieved by the solder 25 connecting the pad 24b and the other end through-hole pad 14b. That is, in the present embodiment, the center pad 23 and the center through-hole pad 13 are compared with the case where, for example, the solder 25 or the like for connecting one end pad 24a and the one end through-hole pad 14a is not provided. The stress applied to the solder 25 for connecting is relaxed. For this reason, the solder 25 that connects the center pad 23 and the center through-hole pad 13 can reduce the possibility of causing a connection failure such as a crack due to a stress applied from the outside.

  In the present embodiment, each of the one end pad 24 a and the other end pad 24 b has a larger area in plan view than the individual center pad 23. A pair of end portions (regions where the end convex portions 22a and 22b are formed) of the second printed circuit board 20 (with respect to the direction in which the central convex portion 21 extends) is a central portion (region where the central convex portion 21 is formed). In particular, the stress tends to concentrate more, but the one end pad 24a and the other end pad 24b having a large area can relieve the stress of the solder 25 connected thereto. Since stress can be relaxed in this way, the area of the central pad 23 in plan view can be further reduced, and the size of the second printed board 20 and the entire three-dimensional printed board 100 including the same can be reduced.

  Note that each of the one end pad 24 a and the other end pad 24 b is not electrically connected to various circuit elements or the like, unlike the center pad 23. Therefore, even if a crack occurs in the solder 25 connected to one end pad 24a or the like, at least the electrical operation of the three-dimensional printed circuit board 100 is not affected. In this sense as well, one end convex portion 22a and the other end convex portion 22b are provided at a pair of end portions of one side of the second printed circuit board 20 where stress tends to concentrate, and one of the large areas is provided there. It is beneficial to relieve stress by providing the end pad 24a and the other end pad 24b and soldering them.

  However, each of the one end pad 24a and the other end pad 24b may be configured to be electrically connected to various circuit elements as in the case of the center pad 23. Even in this case, the one end pad 24a and the other end pad 24b have a larger area in plan view than the center pad 23, so that the one end pad 24a and the other end pad 24b are concentrated in stress. There is a certain effect of suppressing the above.

  Next, in the present embodiment, in the first printed circuit board 10, one end through hole 12a and the other end through hole 12b are asymmetric with respect to the central through hole 11, and the second printed circuit board. In FIG. 20, one end convex portion 22 a and the other end convex portion 22 b are asymmetric with respect to the central convex portion 21. That is, the size of one end through-hole 12a and the other end through-hole 12b is different, and the size of one end convex 22a and the other end convex 22b is different.

  For this reason, when inserting the 2nd printed circuit board 20, for example, the front and back are mistaken, the other edge part convex part 22b is set in one edge part through-hole 12a, and one edge is inserted in the other edge part through-hole 12b. It is possible to eliminate the possibility of generating the defective part of the three-dimensional printed circuit board by inserting the convex part 22a, and to prevent manufacturing problems. This is because one end through-hole 12a and the other end through-hole 12b have different sizes, and thus it is physically impossible to insert the front and back in reverse. In this way, the insertion direction of the second printed circuit board 20 can be uniquely determined.

(Embodiment 2)
Also in the present embodiment, as in the first embodiment, one and the other end through holes 12a and 12b are asymmetric with respect to the central through hole 11, and the one and the other end protrusions 22a and 22b are It is asymmetric with respect to the central convex portion 21. However, in this specific aspect, the present embodiment is different from the first embodiment.

  Specifically, referring to FIG. 6 and FIG. 7, in the present embodiment, in the first printed circuit board 10, one end through hole 12a and the other end through hole 12b are both in the center. The dimension in the extending direction of the through hole 11 is a1. That is, the size of one end through hole 12a and the other end through hole 12b are substantially equal.

  However, in the present embodiment, the distance d1 (with respect to the extending direction of the central through hole 11) between the central through hole 11 and the one end through hole 12a in the first printed circuit board 10, the central through hole 11 and the other through hole. The distance d2 from the end through hole 12b is different from each other.

  Similarly, in the present embodiment, in the second printed circuit board 20, both the one end convex portion 22a and the other end convex portion 22b have a dimension with respect to the extending direction of the central convex portion 21 as a2. It has become. That is, the size of one end convex portion 22a and the other end convex portion 22b are substantially equal.

  However, in the present embodiment, the distance d3 (with respect to the extending direction of the central convex portion 21) between the central convex portion 21 and the one end convex portion 22a in the second printed circuit board 20, the central convex portion 21 and the other convex portion 21a. The distance d4 from the end protrusion 22b is different from each other.

  In addition, since the structure of this Embodiment other than this is as substantially the same as the structure of Embodiment 1, the same code | symbol is attached | subjected about the same element and the description is not repeated.

Next, the effect of this Embodiment is demonstrated.
In the present embodiment, although the size of one end through hole 12a and the other end through hole 12b are equal, the distances from these central through holes 11 are different. Therefore, in the first printed circuit board 10, one end through hole 12 a and the other end through hole 12 b are asymmetric with respect to the central through hole 11. Similarly, although the magnitude | size of one edge part convex part 22a and the other edge part convex part 22b is equal, the distance from these center convex parts 21 differs. Therefore, in the second printed circuit board 20, one end convex portion 22 a and the other end convex portion 22 b are asymmetric with respect to the central convex portion 21. For this reason, similarly to the first embodiment, when the second printed circuit board 20 is inserted, it is possible to prevent the occurrence of a problem that the front and back are erroneously inserted. Other functions and effects of the present embodiment are basically the same as those of the first embodiment.

(Embodiment 3)
Also in the present embodiment, as in the first embodiment, one and the other end through holes 12a and 12b are asymmetric with respect to the central through hole 11, and the one and the other end protrusions 22a and 22b are It is asymmetric with respect to the central convex portion 21. However, in this specific aspect, the present embodiment is different from the first embodiment.

  Specifically, referring to FIG. 8 and FIG. 9, in the present embodiment, in first printed circuit board 10, one end through hole 12 a and the other end through hole 12 b are both centered. The dimension in the extending direction of the through hole 11 is a1. That is, the size of one end through hole 12a and the other end through hole 12b are substantially equal. The distance between the central through hole 11 and the one end through hole 12a (with respect to the direction in which the central through hole 11 extends) and the distance between the central through hole 11 and the other end through hole 12b are both approximately d1. Are equal.

  However, in the present embodiment, the shape of one end through-hole 12a and the other end through-hole 12b in the first printed circuit board 10 (as viewed from above in FIG. 8 that intersects the extending direction). Are different from each other. Specifically, one end through hole 12a has a circular planar shape, whereas the other end through hole 12b has a rectangular planar shape (similar to the first and second embodiments). Yes.

  Similarly, in the present embodiment, in the second printed circuit board 20, both the one end convex portion 22a and the other end convex portion 22b have a dimension with respect to the extending direction of the central convex portion 21 as a2. It has become. That is, the size of one end convex portion 22a and the other end convex portion 22b are substantially equal. The distance between the central convex portion 21 and the one end convex portion 22a (with respect to the extending direction of the central convex portion 21) and the distance between the central convex portion 21 and the other end convex portion 22b are both approximately d2. Are equal.

  However, in the present embodiment, the shape of one end convex portion 22a and the other end convex portion 22b in the second printed circuit board 20 (as viewed from above in FIG. 8 that intersects the extending direction). Are different from each other. Specifically, one end convex portion 22a has a circular planar shape, whereas the other end convex portion 22b has a rectangular planar shape (similar to the first and second embodiments). Yes.

  In addition, since the structure of this Embodiment other than this is as substantially the same as the structure of Embodiment 1, the same code | symbol is attached | subjected about the same element and the description is not repeated.

Next, the effect of this Embodiment is demonstrated.
In the present embodiment, the size of one end through-hole 12a and the other end through-hole 12b and the distance from the central through-hole 11 are the same, but their shapes are different. Therefore, in the first printed circuit board 10, one end through hole 12 a and the other end through hole 12 b are asymmetric with respect to the central through hole 11. Similarly, although the size of one end convex portion 22a and the other end convex portion 22b and the distance from these central convex portions 21 are equal, their shapes are different. Therefore, in the second printed circuit board 20, one end convex portion 22 a and the other end convex portion 22 b are asymmetric with respect to the central convex portion 21. For this reason, similarly to the first embodiment, when the second printed circuit board 20 is inserted, it is possible to prevent the occurrence of a problem that the front and back are erroneously inserted. Other functions and effects of the present embodiment are basically the same as those of the first embodiment.

(Embodiment 4)
Also in the present embodiment, as in the first embodiment, one and the other end through holes 12a and 12b are asymmetric with respect to the central through hole 11, and the one and the other end protrusions 22a and 22b are It is asymmetric with respect to the central convex portion 21. However, in this specific aspect, the present embodiment is different from the first embodiment.

  Specifically, referring to FIGS. 10 and 11, in the present embodiment, first printed circuit board 10 has two one end through-holes 12 a on one side of central through-hole 11. And the other through hole 12 b on the other side of the central through hole 11.

  Note that the dimensions of the two one end through-holes 12a in the direction in which the central through-hole 11 extends are all the same as a1 of the one end through-hole 12a in the first embodiment. The dimensions of the two other end through holes 12b in the extending direction of the central through hole 11 are both the same b1 as that of the other end through hole 12b in the first embodiment. Further, the distance between the central through hole 11 and one end through hole 12a on the side close thereto, and one end through hole 12a on the side close to the central through hole 11 and one end on the side far from the central through hole 11 The distance from the part through hole 12a is d1 which is the same as in the first embodiment. Further, the distance between the central through hole 11 and the other end through hole 12b on the side close thereto, and the other end through hole 12b on the side close to the central through hole 11 and the other end on the side far from the central through hole 11 The distance from the part through hole 12b is d2 which is the same as in the first embodiment.

  Thus, the dimensions of each part of the first printed circuit board 10 are the same as those in the first embodiment. Therefore, also in the present embodiment, as in the first embodiment, the plurality of one end through holes 12a and the plurality of the other end through holes 12b are in relation to the center through hole 11 (the center line CL thereof). It is asymmetric.

  Similarly, in the present embodiment, the second printed circuit board 20 has two one end convex portions 22 a on one side of the central convex portion 21 and 2 on the other side of the central convex portion 21. The other end projection 22b is provided. Each of the two one end protrusions 22a has one end pad 24a as in the first embodiment. Each of the two other end projections 22b has the other end pad 24b as in the first embodiment.

  Note that the dimensions of the two one end protrusions 22a in the extending direction of the center protrusion 21 are both a2 which is the same as the one end protrusion 22a of the first embodiment. In addition, the dimensions of the two other end protrusions 22b in the extending direction of the central protrusion 21 are both b2 which is the same as the other end protrusion 22b of the first embodiment. Further, the distance between the central convex portion 21 and one end convex portion 22a on the side close thereto, and one end convex portion 22a on the side close to the central convex portion 21 and one end on the side far from the central convex portion 21. The distance from the convex portion 22a is d3, which is the same as in the first embodiment. Further, the distance between the central convex portion 21 and the other end convex portion 22b on the side close thereto, and the other end convex portion 22b on the side close to the central convex portion 21 and the other end on the side far from the central convex portion 21. The distance from the convex portion 22b is d4, which is the same as in the first embodiment.

  As described above, the dimensions of each part of the second printed circuit board 20 are the same as those in the first embodiment. Therefore, also in the present embodiment, as in the first embodiment, the plurality of one end protrusions 22a and the plurality of other end protrusions 22b are in relation to the center protrusion 21 (center line CL thereof). It is asymmetric.

  In addition, since the structure of this Embodiment other than this is as substantially the same as the structure of Embodiment 1, the same code | symbol is attached | subjected about the same element and the description is not repeated.

Next, the effect of this Embodiment is demonstrated.
In the present embodiment, a plurality of (for example, two) one end through-holes 12 a and the other end through-hole 12 b are provided on one side and the other side of the center through-hole 11, A plurality of (for example, two) one end convex portions 22a and the other end convex portion 22b are provided on one side and the other side. Thus, at least one each, that is, a plurality of one end through holes 12a may be provided on one side and the other side of the central through hole 11. The same applies to the other end through hole 12b, one end convex portion 22a, and the like. Even in such a case, if they are asymmetric with respect to the center line CL, the effect of being able to uniquely determine the insertion direction of the second printed circuit board 20 is the same as in the first embodiment. Play.

  Each of the first printed circuit board 10 and the second printed circuit board 20 can be in any form as long as it is asymmetric with respect to the center line CL. For example, in the configuration having a plurality of one end through-holes 12a and the other end through-holes 12b as shown in FIGS. 10 and 11, each between one side and the other side as in the second embodiment. It is good also as a structure from which the distance between through-holes differs, and it is good also as a structure from which the shape of each through-hole differs like Embodiment 3. FIG. Further, for example, the number of the end through holes and the end convex portions are different between the one side and the other side (for example, there are two end through holes 12a but one end through hole 12b. It is also possible to adopt a configuration.

Other functions and effects of the present embodiment are basically the same as those of the first embodiment.
(Embodiment 5)
Also in the present embodiment, as in the first embodiment, one and the other end through holes 12a and 12b are asymmetric with respect to the central through hole 11, and the one and the other end protrusions 22a and 22b are It is asymmetric with respect to the central convex portion 21.

  12 and 13, the first printed circuit board 10 and the second printed circuit board 20 of the present embodiment are basically the same as the first printed circuit of the first embodiment shown in FIGS. The substrate 10 and the second printed circuit board 20 have the same configuration and dimensions. The second printed circuit board 20 of the present embodiment has a plurality (for example, 8 each) of two spaced apart from each other on the one main surface 20a and the other main surface 20b of the central convex portion 21. A center pad 23 is formed. Referring particularly to FIG. 13, each of one end convex portion 22a and the other end convex portion 22b is similarly 1 both on one main surface 20a and the other main surface 20b. Each has one end pad 24a and the other end pad 24b. This is the same as in the first embodiment.

  However, the present embodiment is different from the first embodiment in the specific form of one end pad 24a and the other end pad 24b.

  That is, a notch SLT that extends from one main surface 20a to the other main surface 20b is formed in one end protrusion 22a and the other end protrusion 22b. More specifically, for example, from one end pad 24a on one main surface 20a side formed on one end convex portion 22a to one end pad 24a on the other main surface 20b side, A notch SLT in which one end protrusion 22a and one end pad 24a are missing is formed. Similarly, the other end portion is formed so as to reach the other end pad 24b on the other main surface 20b side from the other end pad 24b on the one main surface 20a side formed on the other end convex portion 22b. A notch SLT is formed in which the protrusion 22b and the other end pad 24b are missing.

  In FIG. 12, the notch SLT has a triangular planar shape. However, the planar shape of the notch SLT is arbitrary, and may be, for example, a square or a circle. Further, the notch SLT has a size in the vertical direction in FIG. 12 that is substantially the same as the size of the one end protrusion 22a and the one end pad 24a, but the size of the notch SLT. Is also optional.

  In addition, since the structure of this Embodiment other than this is as substantially the same as the structure of Embodiment 1, the same code | symbol is attached | subjected about the same element and the description is not repeated.

Next, the effect of this Embodiment is demonstrated using FIG.
Referring to FIG. 13 again, when forming the three-dimensional printed circuit board 100 of the present embodiment, first, the first printed circuit board 10 and the second printed circuit board 20 are assembled so as to cross and fit each other. In this state, for example, from one main surface 20a side (left side in FIG. 13), the lower region of the other main surface 10b (the other end convex portion 22b etc. penetrates the other end through hole 12b and the other As shown by an arrow F, solder is supplied to the area protruding below the main surface 10b of the main surface 10b by a flow soldering method.

  At this time, soldering of the other end portion through-hole pad 14b and the other end portion pad 24b on the upstream side of the solder flow F, that is, on the one main surface 20a side, is relatively easy. However, soldering may be difficult for the other end through hole pad 14b and the other end pad 24b on the downstream side of the solder flow F, that is, on the other main surface 20b side. This is because the other end projection 22b itself blocks the solder flow F from wrapping around to the other main surface 20b, and solder is placed on the end through-hole pad 14b and the other end pad 24b on the other main surface 20b side. This is because it becomes difficult to reach.

  Therefore, as in the present embodiment, a notch SLT that reaches the other end pad 24b on the other main surface 20b side from the other end pad 24b on the one main surface 20a side of the other end projection 22b. Is formed. As a result, the solder flow F can easily go around from the one main surface 20a side to the other main surface 20b side by passing through the notch SLT without being blocked by the other end convex portion 22b. . For this reason, it is possible to suppress the occurrence of poor connection due to insufficient soldering particularly on the downstream side (the other main surface 20b side). Therefore, regardless of the flowing direction of the solder flow F, highly reliable soldering can be similarly performed on both the one main surface 20a side and the other main surface 20b side.

  Although the above (including FIG. 13) shows the other end convex portion 22b, the same applies to the other end convex portion 22a. Other functions and effects of the present embodiment are basically the same as those of the first embodiment.

(Embodiment 6)
Also in the present embodiment, as in the first embodiment, one and the other end through holes 12a and 12b are asymmetric with respect to the central through hole 11, and the one and the other end protrusions 22a and 22b are It is asymmetric with respect to the central convex portion 21.

  Referring to FIG. 14, first printed circuit board 10 and second printed circuit board 20 of the present embodiment are basically the same as first printed circuit board 10 of the first embodiment shown in FIGS. It has the same configuration and dimensions as the second printed circuit board 20. As in the first and fifth embodiments, the second printed circuit board 20 is formed with a plurality of center pads 23 spaced apart from each other on both the one main surface 20a and the other main surface 20b of the center convex portion 21. In addition, one end convex portion 22a and the like are also provided with one end pad 24a and the like on both the one main surface 20a and the other main surface 20b.

  However, the present embodiment is different from the first embodiment in the specific mode of the central convex portion 21.

  Specifically, for example, from a region between a pair of central pads 23 adjacent to each other on one main surface 20a side of the central convex portion 21, a pair of central pads 23 adjacent to each other on the other main surface 20b side. A notch SLT that is missing so as to reach the region between them is formed.

  In FIG. 14, the notch SLT has a triangular planar shape. However, the planar shape of the notch SLT is arbitrary, and may be, for example, a square or a circle. Further, the size of the notch SLT is also arbitrary.

  Further, in FIG. 14, the notch SLT is formed only in the central convex portion 21, and the notched portion SLT is not formed in one end convex portion 22 a and the other end convex portion 22 b. However, in addition to the central convex portion 21 in FIG. 14, a notch SLT may be formed in one end convex portion 22 a and the other end convex portion 22 b as in FIG. 12.

  In addition, since the structure of this Embodiment other than this is as substantially the same as the structure of Embodiment 1, the same code | symbol is attached | subjected about the same element and the description is not repeated.

Next, the function and effect of this embodiment will be described.
Also in the present embodiment, as in the fifth embodiment, the solder flow F passes through the notch SLT without being blocked by the center protrusion 21 by the notch SLT formed in the center protrusion 21. . For this reason, for example, the solder flow F can easily wrap around from one main surface 20a side to the other main surface 20b side. For this reason, the center pad 23 of the center convex portion 21 is the same for both the main surface 20a side and the other main surface 20b side, regardless of the flow direction of the solder flow F, as in the fifth embodiment. In addition, highly reliable soldering can be performed. Other functions and effects of the present embodiment are basically the same as those of the first embodiment.

(Embodiment 7)
Also in the present embodiment, as in the first embodiment, one and the other end through holes 12a and 12b are asymmetric with respect to the central through hole 11, and the one and the other end protrusions 22a and 22b are It is asymmetric with respect to the central convex portion 21. However, the present embodiment is different from the first embodiment in terms of soldering on the first printed circuit board 10.

  Specifically, referring to FIGS. 15 and 16, in the present embodiment, central through hole 11 is formed on one main surface 10a of first printed circuit board 10 (on the upper surface in FIG. 15). A plurality of central through-hole pads 15 are formed on the outer periphery of the outer periphery of the outer periphery of the outer periphery of the pad. Further, one end through hole pad 16a is provided on the outer periphery of one end through hole 12a on one main surface 10a of the first printed circuit board 10, and the other end is provided on the outer periphery of the other end through hole 12b. Part through-hole pads 16b are respectively formed.

  In this regard, in the present embodiment, the central through hole pad 13, one end through hole pad 14a, and the other end through hole pad 14b are formed on the other main surface 10b of the first printed circuit board 10. This is different from the first embodiment. The arrangement of the central through-hole pad 15, one end through-hole pad 16a, and the other end through-hole pad 16b on one main surface 10a is the other main surface in each of the above embodiments. The arrangement of the central through-hole pad 13, one end through-hole pad 14a, and the other end through-hole pad 14b on 10b is the same.

  In this case, on one main surface 10a side of the first printed circuit board 10, for example, the central through hole pad 13 and the central pad 23 are connected to each other by, for example, a reflow soldering method. The same applies to the connection between one end through-hole pad 16a and one end pad 24a, and the other end through-hole pad 16b and the other end pad 24b.

The operational effects of the configuration of the present embodiment described above are basically the same as those of the first embodiment.
As shown in FIG. 16, in the present embodiment, a central through hole pad or the like is basically not formed on the other main surface 10 b side of the first printed circuit board 10. However, in the present embodiment, the central through hole pad 15 and the end through hole pads 16a and 16b are formed on one main surface 10a of the first printed circuit board 10, and the center is formed on the other main surface 10b. A configuration in which the through-hole pad 13 and the end through-hole pads 14a and 14b are formed may be employed. If it does in this way, soldering will be made in both the one main surface 10a side of the 1st printed circuit board 10, and the other main surface 10b side. For this reason, the tolerance of the three-dimensional printed circuit board 100 to the stress applied to the first printed circuit board 10 and the second printed circuit board 20 from the outside can be further improved.

  When soldering is performed on both the one main surface 10a side and the other main surface 10b side of the first printed circuit board 10 as described above, for example, a reflow soldering method is performed on one main surface 10a side. Thus, soldering may be performed by the flow soldering method on the other main surface 10b side.

  Furthermore, in the present embodiment, the various pads of the first printed circuit board 10 and the various pads of the second printed circuit board 20 are not limited to soldering, but soldering such as conductive adhesive or ultrasonic bonding, for example. You may connect mutually by connection methods other than. Even when such a connection method is used, it is possible to achieve the same operational effects as when connected by soldering.

  In the above fifth to seventh embodiments, each part such as the central through hole 11 of each of the first printed board 10 and the second printed board 20 basically has the same configuration as that of the first embodiment. As described. However, in the fifth to seventh embodiments, the features such as the respective central through holes 11 of the second to fourth embodiments may be adopted.

  That is, for example, in the configurations of FIGS. 12, 14, and 15, the distance between the through holes may be different between one side and the other side as in the second embodiment, or as in the third embodiment. The through holes may have different shapes. Further, for example, the number of the end through holes and the end convex portions are different between the one side and the other side (for example, there are two end through holes 12a but one end through hole 12b. It is also possible to adopt a configuration. As described above, the features described in the embodiments described above (examples included in the embodiments) may be applied so as to be appropriately combined within a technically consistent range.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  DESCRIPTION OF SYMBOLS 10 1st printed circuit board, 10a, 20a One main surface, 10b, 20b The other main surface, 11 Central through-hole, 12a One end through-hole, 12b Other end through-hole, 13 Central through-hole pad, 14a One end through-hole pad, 14b The other end through-hole pad, 20 Second printed circuit board, 21 Central convex portion, 22a One end convex portion, 22b The other end convex portion, 23 Central pad, 24a One end pad, 24b The other end pad, 25 Solder, 26 Notched bottom surface, 100 Three-dimensional printed circuit board, CL center line, SLT notched portion.

Claims (7)

A first through hole having a central through hole and at least one end through hole formed at a distance from each other on one side in the extending direction of the central through hole and the other side opposite to the one side. A printed circuit board,
2nd which has a center convex part, and the edge part convex part formed mutually spaced apart from both the one side regarding the extending direction of the said central convex part, and the other side on the opposite side to the said one side With a printed circuit board,
The central convex portion is inserted into the central through hole, and each of the plurality of end convex portions is inserted into each of the plurality of end through holes,
The end pad formed on each of the plurality of end convex portions is larger than the central pad formed on the central convex portion,
On the outer periphery of the central through hole and the end through hole, a central through hole pad and an end through hole pad connected to the central pad and the end pad by solder are formed,
The end convex portion is asymmetric with respect to the central convex portion,
The three-dimensional printed circuit board, wherein the end through hole is asymmetric with respect to the central through hole. In the first printed circuit board, the size of the end through hole on the one side with respect to the central through hole is different from the size of the end through hole on the other side with respect to the central through hole. ,
In the second printed circuit board, the size of the end convex portion on the one side with respect to the central convex portion is different from the size of the end convex portion on the other side with respect to the central convex portion. The three-dimensional printed circuit board according to claim 1. In the first printed circuit board, the distance between the central through hole and the one end through hole is different from the distance between the central through hole and the other end through hole.
The distance between the central convex portion and the end convex portion on the one side in the second printed circuit board is different from a distance between the central convex portion and the end convex portion on the other side. 3. The three-dimensional printed circuit board according to 1. In the first printed circuit board, the shape of the end through hole on the one side with respect to the central through hole is different from the shape of the end through hole on the other side with respect to the central through hole.
In the second printed circuit board, the shape of the end convex portion on the one side with respect to the central convex portion is different from the shape of the end convex portion on the other side with respect to the central convex portion. The three-dimensional printed circuit board according to claim 1. The end pad and the center pad are formed both on one main surface of the second printed circuit board and on the other main surface opposite to the one main surface,
The cutout part which reaches the said other main surface from said one main surface is formed in at least any one of the said center convex part or the said edge part convex part. Three-dimensional printed circuit board. The end pad is formed on each of the one main surface and the other main surface of each of the plurality of end protrusions,
The notch portion is formed so as to reach the end pad on the other main surface side from the end pad on the one main surface side in each of the plurality of end convex portions. Item 6. A three-dimensional printed circuit board according to item 5. The central pad is formed in plural on the one main surface and on the other main surface of the central convex part with a space from each other in the extending direction of the central convex part,
The notch portion is a pair of the center pads adjacent to each other on the other main surface side from a region between the pair of center pads adjacent to each other on the one main surface side in the center convex portion. The three-dimensional printed circuit board according to claim 5, wherein the three-dimensional printed circuit board is formed so as to reach a region between the two.

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