Board mounting structure and flexible printed circuit board

Abstract

To provide a board mounting structure and a flexible printed circuit board that can suppress adverse effects on FPC.SOLUTION: A board mounting structure includes an FPC having a connector on one side and a first through hole, and a reinforcing plate attached to the back surface of one side and having a second through hole at a position corresponding to the first through hole, and the FPC is fixed to an object by fastening members inserted into the first and second through holes, and the reinforcing plate is arranged to cover an area of the back surface corresponding to the connector installation area on one side, the diameter of the second through hole is smaller than the diameter of the first through hole, and a portion of the reinforcing plate visible through the second through hole when viewed from the one side functions as a seat for the fastening member.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to a board mounting structure and a flexible printed circuit board. [Background technology]

[0002] For example, Patent Document 1 discloses that a reinforcing plate is provided on one side of an FPC (flexible printed circuit, also called a flexible printed circuit board or flexible printed wiring board), the through holes of the FPC are aligned with the through holes of the reinforcing plate, and bolts are inserted into the through holes from the reinforcing plate side to fasten the FPC to an object. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-295287 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in Patent Document 1, the diameter of the through hole in the FPC is smaller than the diameter of the through hole in the reinforcing plate, which can cause the FPC to get caught when fastened or to be deformed by the force applied when fastening.In addition, there is concern that the application of localized stress may cause deterioration of the FPC.

[0005] An object of one aspect of the present disclosure is to provide a board mounting structure and a flexible printed circuit board that can suppress adverse effects on an FPC. [Means for solving the problem]

[0006] A board mounting structure according to one embodiment of the present disclosure comprises a flexible printed circuit board having a connector on one side and a first through hole, and a reinforcing plate attached to the back surface of the one side and having a second through hole at a position corresponding to the first through hole, wherein the flexible printed circuit board is fixed to an object by fastening members inserted into the first through hole and the second through hole, the reinforcing plate being arranged to cover an area of ​​the back surface corresponding to the connector installation area of ​​the one side, the diameter of the second through hole being smaller than the diameter of the first through hole, and a portion of the reinforcing plate visible through the first through hole when viewed from the one side functions as a seat for the fastening member.

[0007] A flexible printed circuit board according to one embodiment of the present disclosure has a connector on one side and a first through hole, and a reinforcing plate having a second through hole attached to the back surface of the first side at a position corresponding to the first through hole, and is fixed to an object by a fastening member inserted into the first through hole and the second through hole, wherein the reinforcing plate is arranged to cover an area of ​​the back surface corresponding to the connector installation area of ​​the first side, the diameter of the second through hole is smaller than the diameter of the first through hole, and a portion of the reinforcing plate visible through the first through hole when viewed from the one side functions as a seat for the fastening member. [Effects of the Invention]

[0008] According to the present disclosure, adverse effects on the FPC can be suppressed. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view illustrating a state before a reinforcing plate is attached to a flexible printed circuit board according to an embodiment of the present disclosure. [Figure 2] FIG. 1 is a perspective view illustrating a state in which a reinforcing plate is attached to a flexible printed circuit board according to an embodiment of the present disclosure. [Figure 3]FIG. 1 is a perspective view illustrating a state before a flexible printed circuit board according to an embodiment of the present disclosure is attached to a module. [Figure 4] FIG. 1 is a perspective view illustrating a state in which a flexible printed circuit board according to an embodiment of the present disclosure is attached to a module. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings.

[0011] First, a board mounting structure according to the present embodiment will be described with reference to FIGS.

[0012] FIG. 1 is a perspective view showing a state before a reinforcing plate 4 is attached to a flexible printed circuit board (hereinafter referred to as FPC) 1. As shown in FIG.

[0013] 1, a connector 2 electrically connected to a module 6 (see FIGS. 3 and 4) is provided on one surface of the FPC 1. Hereinafter, the surface of the FPC 1 on which the connector 2 is provided will be referred to as the first surface, and the back side (rear surface) of the first surface will be referred to as the second surface.

[0014] 1, the FPC 1 is provided with through holes 3 (an example of first through holes) into which screw members 7 (see FIGS. 3 and 4) are inserted. Note that, in the present embodiment, the number of through holes 3 is two, but this is not limiting.

[0015] 1 to 4, the upper portion (the portion at the end of the bent portion) of the FPC 1 is not shown.

[0016] 1 is a plate-like member for reinforcing the FPC 1, and is attached to the second surface of the FPC 1 with an adhesive or the like as shown in Fig. 2. The reinforcing plate 4 is made of, for example, metal, but is not limited to this.

[0017] 1, the reinforcing plate 4 is provided with through holes 5 (an example of second through holes) into which screw members 7 (see FIGS. 3 and 4) are inserted. The through holes 5 are provided at positions corresponding to the through holes 3 when the reinforcing plate 4 is attached to the FPC 1. The diameter of the through holes 5 is smaller than the diameter of the through holes 3.

[0018] The reinforcing plate 4 attached to the FPC 1 covers the area of ​​the second surface of the FPC 1 that corresponds to the connector installation area on the first surface (in other words, the area that corresponds to the back side of the connector installation area; for example, the area a inside the dotted line in Figure 2).

[0019] The FPC 1 with the reinforcing plate 4 attached thereto is attached to a module 6 shown in Fig. 3. The module 6 (an example of an object) is, for example, but not limited to, a battery module mounted on a vehicle. The module 6 has, for example, a rectangular parallelepiped shape, but Figs. 3 and 4 only show a portion of it.

[0020] 3, the module 6 is provided with a screw member 7 protruding from its outer surface. The screw member 7 may be a stud fixed to the module 6 by welding or the like, or may be a bolt that can be attached to and detached from the module 6.

[0021] The screw member 7 is inserted into the through hole 5 and the through hole 3, and the nut 8 is screwed onto the screw member 7. In this way, the FPC 1 is fixed to the module 6. Note that in the present embodiment, the screw member 7 and the nut 8 are described as an example of a fastening member, but the present invention is not limited to these, and any fastening member (e.g., a rivet) that can be inserted into the through hole 5 and the through hole 3 to fix the FPC 1 to the module 6 may be used.

[0022] As described above, the diameter of the through hole 5 in the reinforcing plate 4 is smaller than the diameter of the through hole 3 in the FPC 1. Therefore, a portion 9 of the reinforcing plate 4 (see FIG. 3 ) visible through the through hole 5 when viewed from the first surface side of the FPC 1 functions as a bearing surface for the nut 8.

[0023] Furthermore, the diameter of the through hole 3 is larger than the maximum diameter of the nut 8. Therefore, the nut 8 screwed onto the screw member 7 does not ride up onto the FPC 1.

[0024] The FPC 1 may be attached to the module 6 via a bracket (not shown).

[0025] As described above, the board mounting structure of this embodiment comprises an FPC 1 having a connector 2 provided on a first surface and a through hole 3, and a reinforcing plate 4 attached to the second surface, which is the back surface of the first surface, and having a through hole 5 at a position corresponding to the through hole 3, and the FPC 1 is fixed to the module 6 by fastening members (e.g., screw members 7 and nuts 8) inserted into the through holes 3 and 5, and the reinforcing plate 4 is arranged to cover an area of ​​the second surface of the FPC 1 that corresponds to the connector installation area on the first surface, the diameter of the through hole 5 is smaller than the diameter of the through hole 3, and a portion 9 of the reinforcing plate 4 visible through the through hole 3 when viewed from the first surface side of the FPC 1 functions as a seat for the fastening member (e.g., nut 8).

[0026] Therefore, since the reinforcing plate 4 is arranged to cover the area of ​​the second surface of the FPC 1 that corresponds to the connector installation area on the first surface, the load on the connector 2 is reduced and the reliability of the connector 2 can be improved.

[0027] Furthermore, since the diameter of through hole 5 is smaller than the diameter of through hole 3, a portion 9 of reinforcing plate 4 visible through through hole 3 when viewed from the first surface side of FPC1 functions as a seat surface for nut 8, thereby preventing damage or deformation (e.g., tearing or warping) of FPC1 due to tightening torque.

[0028] As described above, the board mounting structure of this embodiment can suppress adverse effects on the FPC 1.

[0029] The present disclosure is not limited to the above-described embodiments, and various modifications are possible without departing from the spirit of the present disclosure. [Industrial Applicability]

[0030] The board mounting structure and flexible printed circuit board of the present disclosure are useful in techniques for mounting a board to an object. [Explanation of symbols]

[0031] 1 Flexible Printed Circuit (FPC) 2 connectors 3 through holes 4 Reinforcement plate 5 through holes 6 Modules 7 Screw material 8 nuts 9 Part of the reinforcing plate 4 seen through the through hole 3

Claims

1. a flexible printed circuit board having a connector on one surface and a first through hole; a reinforcing plate attached to the rear surface of the one surface and having a second through hole at a position corresponding to the first through hole; A board mounting structure in which the flexible printed circuit board is fixed to an object by fastening members inserted into the first through hole and the second through hole, the reinforcing plate is provided to cover an area of ​​the rear surface corresponding to the connector installation area of ​​the one surface, a diameter of the second through hole is smaller than a diameter of the first through hole, and a portion of the reinforcing plate exposed through the first through hole when viewed from the one surface side functions as a seat surface for the fastening member; Board mounting structure.

2. The object is a battery module mounted on a vehicle. The board mounting structure according to claim 1 .

3. There is a connector on one side, a first through hole; a reinforcing plate having a second through hole at a position corresponding to the first through hole is attached to the rear surface of the one surface; A flexible printed circuit board that is fixed to an object by fastening members inserted into the first through hole and the second through hole, the reinforcing plate is provided to cover an area of ​​the rear surface corresponding to the connector installation area of ​​the one surface, a diameter of the second through hole is smaller than a diameter of the first through hole, and a portion of the reinforcing plate exposed through the first through hole when viewed from the one surface side functions as a seat surface for the fastening member; Flexible printed circuit board.

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