Structure

Abstract

The structure is a structure in which a plurality of metal sheets (10, 20) having conductive base materials covered with insulating coatings are stacked in the thickness direction, and includes a protruding portion (11) provided on one of the metal sheets (10) of the adjacent metal sheets (10, 20) fastened together by a screw (51) and protruding toward the other metal sheet (20), an elastic deformation portion (12) provided on the metal sheet (10) so as to surround the periphery of the protruding portion (11) and elastically deformable when fastened with the screw (51), a protruding portion (21) on the metal sheet (20) protruding toward the metal sheet (10) and disposed so as to intersect with the protruding portion (11), and an elastic deformation portion (22) provided on the metal sheet (20) so as to surround the periphery of the protruding portion (21) and elastically deformable when fastened with the screw (51). When fastened with the screw (51), the tip of the protruding portion (11) and the tip of the protruding portion (21) come into contact with each other.

Description

[Technical field]

[0001] The present disclosure relates to structures. [Background technology]

[0002] In some cases, metal sheets are used for the housings of electronic devices. In such cases, measures against noise currents or leakage currents are taken by improving the electrical conductivity between the metal sheets. Therefore, Patent Document 1 discloses a technique for improving the electrical conductivity between the metal sheets that form the structure. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 47-18727 Summary of the Invention [Problem to be solved by the invention]

[0004] In the structure disclosed in Patent Document 1, peaks and valleys are alternately arranged on the opposing surfaces of the metal sheets. In this case, the peaks and valleys of one metal sheet and the peaks and valleys of the other metal sheet are arranged to intersect with each other. In this state, when the metal sheets are fastened together with a screw, the tips of the opposing peaks come into contact with each other and crush each other. This causes the insulating coating to peel off from the crushed parts. As a result, the base materials (conductors) of the metal sheets come into contact with each other and become conductive.

[0005] However, the structure disclosed in Patent Document 1 uses screws to fasten the metal sheets together, and if the screws become loose for some reason, there is a risk that electrical continuity between the base materials will be lost.

[0006] The present disclosure has been made to solve the above-mentioned problems, and aims to provide a structure that can ensure electrical conductivity between the base metal sheets even if the fastening members become loose. [Means for solving the problem]

[0007] The structure according to the present disclosure is a structure in which a plurality of metal sheets, each having a conductive base material covered with an insulating coating, are stacked in the thickness direction, and includes: one protrusion provided on one of the adjacent metal sheets fastened by a fastening member and protruding toward the other metal sheet; one elastically deforming portion provided on one of the metal sheets so as to surround the periphery of the one protrusion and which elastically deforms when fastened by the fastening member; the other protrusion on the other metal sheet protruding toward the one metal sheet and positioned so as to intersect with the one protrusion; and the other elastically deforming portion provided on the other metal sheet so as to surround the periphery of the other protrusion and which elastically deforms when fastened by the fastening member; and when fastened by the fastening member, the tip of the one protrusion and the tip of the other protrusion come into contact with each other. Effect of the Invention

[0008] According to the present disclosure, even if a fastening member becomes loose, electrical continuity between the base materials of the metal sheets can be ensured. Therefore, special screws, washers, and the like for providing electrical continuity between the base materials of the metal sheets are not required. [Brief description of the drawings]

[0009] [Figure 1] Fig. 1A is a schematic diagram of a structure according to embodiment 1. Fig. 1A is a front view of the structure according to embodiment 1. Fig. 1B is a view of one metal plate seen from the front side. Fig. 1C is a view of the other metal plate seen from the back side. [Diagram 2] Fig. 2A is a schematic perspective view of the structure according to embodiment 1. Fig. 2B is a perspective view of one of the metal plates. [Diagram 3] 3A is a cross-sectional view showing a fastening operation in the structure according to the embodiment 1, before one metal plate and another metal plate are fastened to each other, and FIG 3B is a cross-sectional view showing a state after one metal plate and another metal plate are fastened to each other. [Figure 4]Fig. 4A is a schematic diagram of a structure according to embodiment 2. Fig. 4A is a front view of the structure according to embodiment 2. Fig. 4B is a view of one metal plate as viewed from the front side. Fig. 4C is a view of the other metal plate as viewed from the back side. [Diagram 5] 5A is a cross-sectional view showing a fastening operation in a structure according to embodiment 2. FIG 5A is a cross-sectional view showing a state before one metal plate and another metal plate are fastened to each other. FIG 5B is a cross-sectional view showing a state after one metal plate is fastened to the other metal plate. [Figure 6] Fig. 6A is a schematic diagram of a structure according to embodiment 3. Fig. 6A is a front view of the structure according to embodiment 3. Fig. 6B is a view of one metal plate seen from the front side. Fig. 6C is a view of the other metal plate seen from the back side. [Figure 7] 13 is a rear view of the other metal plate in the structure according to the third embodiment. FIG. [Figure 8] FIG. 11 is a schematic configuration diagram of a structure according to a fourth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] In order to describe the present disclosure in more detail, embodiments of the present disclosure will be described below with reference to the accompanying drawings.

[0011] Embodiment 1 The structure according to the first embodiment will be described with reference to FIGS. 1 to 3. FIG.

[0012] First, the configuration of the structure according to the first embodiment will be described with reference to Fig. 1 to Fig. 3. Fig. 1 is a schematic configuration diagram of the structure according to the first embodiment. Fig. 2 is a schematic perspective view of the structure according to the first embodiment. Fig. 3 is a diagram showing the fastening operation of the structure according to the first embodiment.

[0013] As shown in Figures 1A and 2A, the structure of embodiment 1 is applied, for example, between two metal plates 10, 20 that are stacked on top of each other in the thickness direction among multiple metal plates that constitute the housing (not shown) of an electronic device.

[0014] The metal sheets 10 and 20 are composed of a conductive base material and an insulating coating (surface layer of the metal sheets 10 and 20) formed on the front and back surfaces of the base material. The base material is, for example, a conductor such as a metal. The insulating coating is, for example, a paint coating or a protective coating for preventing corrosion.

[0015] One metal sheet 10 and the other metal sheet 20 are overlapped with their respective portions facing each other, and the overlapped portions are fastened together by a screw 51. The screw 51 constitutes a fastening member. The fastening member may be a rivet, a snap fit, or the like.

[0016] 1 and 2, the metal plate 10 includes a protruding portion 11 and an elastically deforming portion 12. The protruding portion 11 and the elastically deforming portion 12 are provided in a region of the metal plate 10 facing the metal plate 20.

[0017] As shown in Fig. 3, the metal sheet 10 has a front surface 10a, a back surface 10b, and a screw hole 10c. The front surface 10a is a surface facing the metal sheet 20. The back surface 10b is a surface located opposite to the front surface 10a. The screw hole 10c penetrates the metal sheet 10 in the thickness direction. That is, the screw hole 10c opens on both the front surface 10a and the back surface 10b. A screw 51 can be fastened into the screw hole 10c.

[0018] The protrusion 11 protrudes outward from the front surface 10a of the metal sheet 10. In other words, the protrusion 11 protrudes from the front surface 10a of the metal sheet 10 toward the metal sheet 20. This protrusion 11 is formed by deforming the entire thickness of the metal sheet 10. That is, the protrusion 11 is formed by the front surface 10a and the back surface 10b of the metal sheet 10 being integrated with each other.

[0019] Moreover, a cross section perpendicular to the length direction of the protruding portion 11 is substantially triangular. One vertex of this triangle forms the tip of the protruding portion 11. This tip extends linearly.

[0020] The elastic deformation portion 12 is provided in an annular shape so as to surround the periphery of the protrusion 11. The protrusion 11 and the elastic deformation portion 12 are formed continuously. Specifically, the outer peripheral edge of the protrusion 11 and the inner peripheral edge of the elastic deformation portion 12 are smoothly connected without any seams.

[0021] The elastic deformation portion 12 protrudes outward from the back surface 10b of the metal sheet 10. In other words, the elastic deformation portion 12 protrudes from the back surface 10b of the metal sheet 10 in a direction away from the metal sheet 20. The protruding direction of the protruding portion 11 from the metal sheet 10 and the protruding direction of the elastic deformation portion 12 from the metal sheet 10 are opposite to each other. The elastic deformation portion 12 is formed by deforming the entire thickness of the metal sheet 10. In addition, the cross section of the elastic deformation portion 12 perpendicular to the circumferential direction is substantially triangular. The elastic deformation portion 12 is formed as described above, so that it can be elastically deformed in the thickness direction of the metal sheet 10.

[0022] 1 and 2, the metal plate 20 includes a protruding portion 21 and an elastically deforming portion 22. The protruding portion 21 and the elastically deforming portion 22 are provided in a region of the metal plate 20 facing the metal plate 10.

[0023] As shown in Fig. 3, the metal sheet 20 has a front surface 20a, a back surface 20b, and a screw through hole 20c. The front surface 20a is an opposing surface facing the front surface 10a of the metal sheet 10. The back surface 20b is a surface located opposite the front surface 20a. The screw through hole 20c is a so-called clearance hole that penetrates the metal sheet 20 in the thickness direction. That is, the screw through hole 20c is open on the front surface 20a and the back surface 20b, respectively. The screw through hole 20c corresponds to the screw hole 10c, and the screw 51 can be passed through the screw through hole 20c.

[0024] The protrusion 21 protrudes outward from the front surface 20a of the metal sheet 20. In other words, the protrusion 21 protrudes from the front surface 20a of the metal sheet 20 toward the metal sheet 10. This protrusion 21 is formed by deforming the entire thickness of the metal sheet 20. That is, the protrusion 21 is formed by integrally forming the front surface 20a and the back surface 20b of the metal sheet 20.

[0025] Moreover, a cross section of the protruding portion 21 perpendicular to the longitudinal direction is substantially triangular. One vertex of this triangle forms the tip of the protruding portion 21. This tip extends linearly.

[0026] The elastic deformation portion 22 is provided in an annular shape so as to surround the periphery of the protrusion 21. The protrusion 21 and the elastic deformation portion 22 are formed continuously. Specifically, the outer peripheral edge of the protrusion 21 and the inner peripheral edge of the elastic deformation portion 22 are smoothly connected without any seams.

[0027] The elastic deformation portion 22 protrudes outward from the back surface 20b of the metal sheet 20. In other words, the elastic deformation portion 22 protrudes from the back surface 20b of the metal sheet 20 in a direction away from the metal sheet 10. The protruding direction of the protruding portion 21 from the metal sheet 20 and the protruding direction of the elastic deformation portion 22 from the metal sheet 20 are opposite to each other. The elastic deformation portion 22 is formed by deforming the entire thickness of the metal sheet 20. In addition, the cross section of the elastic deformation portion 22 perpendicular to the circumferential direction is substantially triangular. By being formed as described above, the elastic deformation portion 22 is elastically deformable in the thickness direction of the metal sheet 20.

[0028] The metal sheets 10 and 20 are arranged such that the tip of the protruding portion 11 and the tip of the protruding portion 21 intersect with each other.

[0029] Next, the fastening operation of the structure according to the first embodiment will be described with reference to FIG.

[0030] 3A, a surface 10a of the metal sheet 10 and a surface 20a of the metal sheet 20 are disposed to face each other. That is, the metal sheets 10 and 20 are disposed so that the tip of the protruding portion 11 and the tip of the protruding portion 21 intersect with each other.

[0031] Next, as shown in FIG. 3B, the screw 51 is fastened into the screw hole 10c of the metal sheet 10 through the screw through hole 20c of the metal sheet 20. As a result, the metal sheets 10 and 20 are fastened together by the screw 51. At this time, the tip of the protrusion 11 and the tip of the protrusion 21 come into contact with each other, and pressure is concentrated in a small area. Therefore, the insulating coating at the two tips is destroyed, and the base materials at the two tips come into contact with each other. As a result, the base material at the protrusion 11 and the base material at the protrusion 21 are electrically connected. Therefore, a path for noise current or leakage current is secured between the metal sheets 10 and 20.

[0032] As described above, when the metal sheets 10 and 20 are fastened together, the elastic deformation portion 12 is elastically deformed as the protrusion 11 is pressed against the back surface 10b. The elastic deformation portion 22 is elastically deformed as the protrusion 21 is pressed against the back surface 20b.

[0033] Here, if the screw 51 loosens for some reason and the fastening force decreases, a gap will be generated between the protrusions 11, 21, and electrical continuity will be lost. However, since the structure according to the first embodiment includes the elastically deforming parts 12, 22, the elastic deformation of the elastically deforming parts 12, 22, in other words, the return force of the elastically deforming parts 12, 22 to their original shapes (positions) can be used to maintain contact between the protrusions 11, 21. Therefore, even if the screw 51 loosens, electrical continuity between the metal sheets 10, 20 can be maintained, and the effects of noise current or leakage current can be prevented.

[0034] As described above, the structure according to the first embodiment is a structure in which a plurality of metal sheets 10, 20, each having a conductive base material covered with an insulating film, are stacked in the thickness direction, and includes one protruding portion 11 provided on one of the metal sheets 10 and protruding toward the other metal sheet 20, one elastically deforming portion 12 provided on the one metal sheet 10 so as to surround the periphery of the one protruding portion 11 and elastically deformed when fastened by the screw 51, the other protruding portion 21 on the other metal sheet 20 and disposed so as to intersect with the one protruding portion 11, and the other elastically deforming portion 22 provided on the other metal sheet 20 so as to surround the periphery of the other protruding portion 21 and elastically deformed when fastened by the screw 51. When fastened by the screw 51, the tip of the one protruding portion 11 and the tip of the other protruding portion 21 come into contact with each other. Therefore, even if the screw 51 becomes loose, the structure according to the first embodiment can ensure electrical continuity between the base materials of the metal sheets 10 and 20. Moreover, the structure according to the first embodiment does not require special screws, washers, or the like for ensuring electrical continuity between the base materials of the metal sheets 10 and 20.

[0035] Embodiment 2 The structure according to the second embodiment will be described with reference to Fig. 4 and Fig. 5. Note that the same reference numerals are used to designate components having the same functions as those described in the first embodiment, and the description thereof will be omitted.

[0036] First, the configuration of the structure according to the second embodiment will be described with reference to Fig. 4. Fig. 4 is a schematic diagram of the structure according to the second embodiment.

[0037] As shown in FIG. 4, the structure according to the second embodiment includes an elastic deformation portion 13 instead of the elastic deformation portion 12 of the metal plate 10. As shown in FIG.

[0038] 4B, the elastic deformation portion 13 is provided in an annular shape so as to surround the periphery of the protrusion 11. The protrusion 11 and the elastic deformation portion 12 are formed continuously. Specifically, the outer peripheral edge of the protrusion 11 and the inner peripheral edge of the elastic deformation portion 12 are smoothly connected without any seams.

[0039] The elastic deformation portion 13 protrudes outward from the back surface 10b of the metal sheet 10. In other words, the elastic deformation portion 13 protrudes from the back surface 10b of the metal sheet 10 in a direction away from the metal sheet 20. The elastic deformation portion 13 is formed by deforming the entire thickness of the metal sheet 10. The elastic deformation portion 12 is formed as described above, and is thereby elastically deformable in the thickness direction of the metal sheet 10.

[0040] In addition, the cross-sectional shape of the elastically deforming portion 13 perpendicular to the longitudinal direction of the tip of the protruding portion 11 is asymmetric on both sides of the tip. For example, one side of the elastically deforming portion 13 centered on the tip of the protruding portion 11 has one bulging portion toward the back surface 10b. In contrast, the other side of the elastically deforming portion 13 centered on the tip of the protruding portion 11 has one bulging portion toward the back surface 10b and one bulging portion toward the front surface 10a. In this case, the bulging portion toward the front surface 10a is located outside the sheet metal 10 relative to the bulging portion toward the back surface 10b.

[0041] In this way, the elastic deformation portion 13 has a cross-sectional shape perpendicular to the longitudinal direction of the tip of the protrusion 11 that is asymmetric on both sides of the tip, so that a difference in the amount of elastic deformation can be provided between the amount of elastic deformation on one side and the amount of elastic deformation on the other side of the tip of the protrusion 11. Specifically, the other side of the elastic deformation portion 13 centered on the tip of the protrusion 11 has a more complex shape than the one side of the elastic deformation portion 13 centered on the tip of the protrusion 11. Therefore, the amount of elastic deformation on the other side is greater than the amount of elastic deformation on the one side.

[0042] Next, the fastening operation of the structure according to the second embodiment will be described with reference to Fig. 5. Fig. 5 is a diagram showing the fastening operation of the structure according to the second embodiment. Note that in Fig. 5B, the metal plate 20 is omitted.

[0043] 5A, a surface 10a of the metal sheet 10 and a surface 20a of the metal sheet 20 are disposed to face each other. That is, the metal sheets 10 and 20 are disposed so that the tip of the protruding portion 11 and the tip of the protruding portion 21 intersect with each other.

[0044] Next, as shown in FIG. 5B, the screw 51 is fastened to the screw hole 10c of the metal plate 10 through the screw through hole 20c of the metal plate 20. As a result, the metal plates 10 and 20 are fastened by the screw 51. At this time, the tip of the protrusion 11 and the tip of the protrusion 21 come into contact with each other, and pressure is concentrated on a small area. In addition, the elastic deformation amount on the other side of the elastic deformation portion 13 is larger than the elastic deformation amount on one side. Therefore, the tip position of the protrusion 11 is shifted toward the other side. That is, the tip of the protrusion 11 moves along the length direction of the tip while contacting the tip of the protrusion 21. Accordingly, the insulating coating at the two tips is sufficiently broken, and the base materials at the two tips come into contact with each other. As a result, the base material at the protrusion 11 and the base material at the protrusion 21 are electrically connected. Therefore, a path for noise current or leakage current is secured between the metal plates 10 and 20.

[0045] As described above, when the metal sheets 10 and 20 are fastened together, the elastic deformation portion 13 is elastically deformed as the protrusion 11 is pressed against the rear surface 10b. The elastic deformation portion 22 is elastically deformed as the protrusion 21 is pressed against the rear surface 20b.

[0046] Here, if the screw 51 loosens for some reason and the fastening force decreases, a gap will be generated between the protrusions 11, 21, and electrical continuity will be lost. However, since the structure according to the second embodiment includes the elastic deformation parts 13, 22, the elastic deformation of the elastic deformation parts 13, 22, in other words, the return force of the elastic deformation parts 13, 22 to their original shapes (positions) can be used to maintain contact between the protrusions 11, 21. Therefore, even if the screw 51 loosens, electrical continuity between the metal sheets 10, 20 can be maintained, and the effects of noise current or leakage current can be prevented.

[0047] In the structure according to the second embodiment, the cross-sectional shape of the elastic deformation portion 13 in the metal sheet 10 is asymmetric, but the cross-sectional shape of the elastic deformation portion 22 in the metal sheet 20 may be asymmetric.

[0048] As described above, in the structure according to the second embodiment, the cross-sectional shape of the elastically deforming portion 13 perpendicular to the longitudinal direction of the tip of the protruding portion 11 is asymmetric on both sides of the tip. Therefore, the structure according to the second embodiment can effectively peel off the insulating coating between the tip of the elastically deforming portion 13 and the tip of the elastically deforming portion 22.

[0049] In the structure according to the second embodiment, the tip of the protrusion 11 moves from the tip toward the side where the deformation amount of the elastic deformation portion 13 is larger. Therefore, the structure according to the second embodiment can increase the peeling range of the insulating coating, thereby improving the electrical conductivity.

[0050] Furthermore, in the structure according to the second embodiment, the tip of protrusion 11 moves along the length direction of the tip of protrusion 21. Therefore, the structure according to the second embodiment can maintain contact between the tip of protrusion 11 and the tip of protrusion 21 for a long period of time and distance. As a result, the structure according to the second embodiment can expand the peeling range of the insulating coating.

[0051] Embodiment 3 The structure according to the third embodiment will be described with reference to Fig. 6 and Fig. 7. Note that components having the same functions as those described in the first embodiment above are given the same reference numerals, and the description thereof will be omitted.

[0052] First, the configuration of the structure according to the third embodiment will be described with reference to Fig. 6. Fig. 6 is a schematic diagram of the structure according to the third embodiment.

[0053] As shown in Fig. 6, the structure according to the third embodiment includes a plurality of pairs of protruding portions 11 and elastically deforming portions 12, and includes one pair of protruding portions 23 and elastically deforming portions 24. Fig. 6 shows an example in which the structure according to the third embodiment includes four pairs of protruding portions 11 and elastically deforming portions 12, and includes one pair of protruding portions 23 and elastically deforming portions 24.

[0054] 6, each pair of protrusions 11 and elastic deformation portions 12 are disposed at equal angular intervals around the screw hole 10c and the screw 51. In contrast, the protrusions 23 and elastic deformation portions 24 are formed in a circular shape around the screw-through hole 20c and the screw 51. Four pairs of protrusions 11 and elastic deformation portions 12 and one set of protrusions 23 and elastic deformation portions 24 face each other in the plate thickness direction.

[0055] Specifically, the protrusion 23 protrudes outward from the surface 10a of the metal sheet 20. In other words, the protrusion 23 protrudes from the surface 20a of the metal sheet 20 toward the metal sheet 10. This protrusion 11 is formed by deforming the entire thickness of the metal sheet 10. That is, the protrusion 11 is formed by the surface 10a and the back surface 10b of the metal sheet 10 being integrated with each other.

[0056] Moreover, the cross section of the protruding portion 23 perpendicular to the longitudinal direction is substantially triangular. One vertex of this triangle forms the tip of the protruding portion 23. This tip is formed in a circular shape with the screw-through hole 20c and the screw 51 at its center.

[0057] The elastic deformation portions 24 are provided so as to surround the protruding portion 23. The elastic deformation portions 24 are disposed radially inside and outside the protruding portion 23. That is, the elastic deformation portions 24 are disposed so as to sandwich the protruding portion 23 from both radial sides thereof.

[0058] The elastic deformation portion 24 protrudes outward from the back surface 20b of the metal sheet 20. In other words, the elastic deformation portion 24 protrudes from the back surface 10b of the metal sheet 20 in a direction away from the metal sheet 20. The protruding direction of the protruding portion 23 from the metal sheet 20 and the protruding direction of the elastic deformation portion 24 from the metal sheet 10 are opposite to each other. The elastic deformation portion 24 is formed by deforming the entire thickness of the metal sheet 20. In addition, the cross section of the elastic deformation portion 24 perpendicular to the circumferential direction is substantially triangular. By being formed as described above, the elastic deformation portion 24 is elastically deformable in the thickness direction of the metal sheet 20.

[0059] In this way, the structure according to the third embodiment has four pairs of the protruding portion 11 and the elastically deforming portion 12 for one pair of the protruding portion 23 and the elastically deforming portion 24, and thus the probability that the insulating coating is broken and a conductive passage is established can be improved by 16 times compared to the case where one pair of the protruding portion 21 and the elastically deforming portion 22 has one pair of the protruding portion 11 and the elastically deforming portion 12. Moreover, the structure according to the third embodiment can reduce the resistance value between the metal sheets 10 and 20 during conduction to one-fourth of that at that time. Furthermore, the structure according to the third embodiment can stabilize the metal sheets 10 and 20 when fastened. Therefore, the structure can improve the assembly accuracy between the metal sheets 10 and 20.

[0060] The structure according to the third embodiment may adopt the configuration shown in Fig. 7. Fig. 7 is a view of another metal plate 20 in the structure according to the third embodiment, seen from the back side. As shown in Fig. 7, the structure according to the third embodiment may have the same number of pairs of protruding portions 11 and elastically deforming portions 12 as the number of pairs of protruding portions 21 and elastically deforming portions 22, and each pair in the metal plate 10 may face each pair in the metal plate 20. Even if such a configuration is adopted, the same effect as above can be obtained.

[0061] In the structure of embodiment 3, the protrusion 23 and the elastic deformation portion 24 of the metal sheet 20 are formed in a circular shape, but the protrusion 11 and the elastic deformation portion 12 of the metal sheet 10 may also be formed in a circular shape.

[0062] As described above, the structure according to the third embodiment includes multiple pairs of protrusions 11 and elastic deformation portions 12, and one pair of protrusions 23 and elastic deformation portions 24, with each pair of protrusions 11 and elastic deformation portions 12 facing the pair of protrusions 23 and elastic deformation portions 24. Therefore, the structure according to the third embodiment can effectively peel off the insulating coating between the tip of elastic deformation portion 12 and the tip of elastic deformation portion 24.

[0063] Moreover, in the structure according to the third embodiment, the protruding portion 23 and the elastically deforming portion 24 are formed in a circular shape with the screw 51 at the center. Therefore, the structure according to the third embodiment can stabilize the metal sheets 10 and 20 when fastened. As a result, the structure according to the third embodiment can improve the assembly accuracy between the metal sheets 10 and 20.

[0064] Moreover, in the structure according to the third embodiment, the number of pairs of protrusions 11 and elastic deformation portions 12 and the number of pairs of protrusions 21 and elastic deformation portions 22 are the same, and each pair of protrusions 11 and elastic deformation portions 12 faces each other, and each pair of protrusions 21 and elastic deformation portions 22 faces each other. Therefore, in the structure according to the third embodiment, the insulating coating between the tip of elastic deformation portion 12 and the tip of elastic deformation portion 22 can be effectively peeled off.

[0065] Furthermore, in the structure according to the third embodiment, each pair of the protrusion 11 and the elastic deformation portion 12 is disposed at equal angular intervals around the fastening member. Therefore, the structure according to the third embodiment can stabilize the metal sheets 10 and 20 when fastening. As a result, the structure according to the third embodiment can improve the assembly accuracy between the metal sheets 10 and 20.

[0066] Embodiment 4 The structure according to the fourth embodiment will be described with reference to Fig. 8. Fig. 8 is a schematic diagram of the structure according to the fourth embodiment. Note that the same reference numerals are used for configurations having the same functions as those described in the first embodiment above, and the description thereof will be omitted.

[0067] As shown in Fig. 8, the structure according to the fourth embodiment includes a metal plate 30 in addition to the metal plates 10 and 20. In the structure according to the fourth embodiment, the metal plates 10, 20, and 30 are stacked in order in the thickness direction. The surface 10a of the metal plate 10 and the surface 20a of the metal plate 20 face each other, and the back surface 20b of the metal plate 20 and the surface 30a of the metal plate 30 face each other. Therefore, the back surface 20b and the surface 30a form opposing surfaces.

[0068] The metal plate 20 includes a protruding portion 25 and an elastically deforming portion 26. The protruding portion 25 and the elastically deforming portion 26 are provided in a region of the metal plate 20 facing the metal plate 30.

[0069] The protruding portion 25 protrudes outward from the back surface 20b of the metal sheet 20. In other words, the protruding portion 25 protrudes from the back surface 20b of the metal sheet 20 toward the metal sheet 30. This protruding portion 25 is formed by deforming the entire thickness of the metal sheet 20. In other words, the protruding portion 25 is formed by integrally forming the front surface 20a and the back surface 20b of the metal sheet 20.

[0070] Moreover, a cross section of the protruding portion 25 perpendicular to the longitudinal direction is substantially triangular. One apex of this triangle forms the tip of the protruding portion 25. This tip extends linearly.

[0071] The elastic deformation portion 26 is provided in an annular shape so as to surround the periphery of the protrusion 25. The protrusion 25 and the elastic deformation portion 26 are formed continuously. Specifically, the outer peripheral edge of the protrusion 25 and the inner peripheral edge of the elastic deformation portion 26 are smoothly connected without any seams.

[0072] The elastic deformation portion 26 protrudes outward from the surface 20a of the metal sheet 20. In other words, the elastic deformation portion 26 protrudes from the surface 20a of the metal sheet 20 in a direction away from the metal sheet 30. The protruding direction of the protruding portion 25 from the metal sheet 20 and the protruding direction of the elastic deformation portion 26 from the metal sheet 20 are opposite to each other. The elastic deformation portion 26 is formed by deforming the entire thickness of the metal sheet 20. In addition, the cross section of the elastic deformation portion 26 perpendicular to the circumferential direction is substantially triangular. The elastic deformation portion 26 is formed as described above, so that it can be elastically deformed in the thickness direction of the metal sheet 20.

[0073] In contrast, the metal plate 30 includes a protruding portion 31 and an elastically deforming portion 32. The protruding portion 31 and the elastically deforming portion 32 are provided in a region of the metal plate 30 that faces the metal plate 20.

[0074] The metal sheet 30 has a front surface 30a, a back surface 30b, and a screw through hole 30c. The front surface 30a is an opposing surface facing the metal sheet 20. The back surface 30b is a surface located opposite to the front surface 30a. The screw through hole 30c is a so-called clearance hole that penetrates the metal sheet 30 in the thickness direction. That is, the screw through hole 30c is open on the front surface 30a and the back surface 30b, respectively. The screw through hole 30c corresponds to the screw hole 10c and the screw through hole 20c, and the screw 51 can be passed through the screw through hole 30c.

[0075] The protruding portion 31 protrudes outward from the front surface 10a of the metal sheet 30. In other words, the protruding portion 31 protrudes from the front surface 10a of the metal sheet 30 toward the metal sheet 20. This protruding portion 31 is formed by deforming the entire thickness of the metal sheet 30. That is, the protruding portion 31 is formed by integrally forming the front surface 30a and the back surface 30b of the metal sheet 30.

[0076] Moreover, a cross section of the protruding portion 31 perpendicular to the longitudinal direction is substantially triangular. One vertex of this triangle forms the tip of the protruding portion 31. This tip extends linearly.

[0077] The elastic deformation portion 32 is provided in an annular shape so as to surround the periphery of the protrusion 31. The protrusion 31 and the elastic deformation portion 32 are formed continuously. Specifically, the outer peripheral edge of the protrusion 31 and the inner peripheral edge of the elastic deformation portion 32 are smoothly connected without any seams.

[0078] The elastic deformation portion 32 protrudes outward from the back surface 30b of the metal sheet 30. In other words, the elastic deformation portion 32 protrudes from the back surface 30b of the metal sheet 30 in a direction away from the metal sheet 20. The protruding direction of the protruding portion 31 from the metal sheet 10 and the protruding direction of the elastic deformation portion 32 from the metal sheet 10 are opposite to each other. The elastic deformation portion 32 is formed by deforming the entire thickness of the metal sheet 30. In addition, the cross section of the elastic deformation portion 32 perpendicular to the circumferential direction is substantially triangular. The elastic deformation portion 32 is formed as described above, so that it can be elastically deformed in the thickness direction of the metal sheet 30.

[0079] The one metal plate 20 and the other metal plate 30 are arranged such that the tip of the protruding portion 25 and the tip of the protruding portion 31 intersect with each other.

[0080] As described above, the structure according to the fourth embodiment is a structure in which a plurality of metal sheets 10, 20, 30, each having a conductive base material covered with an insulating film, are stacked in the thickness direction, and includes one protruding portion 25 provided on one of the metal sheets 20 and protruding toward the other metal sheet 30, one elastically deforming portion 26 provided on the one metal sheet 20 so as to surround the periphery of the one protruding portion 25 and elastically deformed when fastened by the screw 51, the other protruding portion 31 on the other metal sheet 30 so as to protrude toward the one metal sheet 20 and intersect with the one protruding portion 25, and the other elastically deforming portion 32 provided on the other metal sheet 30 so as to surround the periphery of the other protruding portion 31 and elastically deformed when fastened by the screw 51. When fastened by the screw 51, the tip of the one protruding portion 25 and the tip of the other protruding portion 31 come into contact with each other. Therefore, even if the screw 51 becomes loose, the structure according to the fourth embodiment can ensure electrical continuity between the base materials of the metal sheets 20 and 30. Moreover, the structure according to the fourth embodiment does not require special screws, washers, or the like for establishing electrical continuity between the base materials of the metal sheets 30 and 30.

[0081] In addition, within the scope of the present disclosure, the embodiments may be freely combined, or any of the components in each embodiment may be modified, or any of the components in each embodiment may be omitted. [Industrial Applicability]

[0082] The structure according to the present disclosure is suitable for use in structures and the like because electrical conduction between the base metal sheets can be ensured by providing an elastically deformable portion that surrounds the periphery of the protrusion. [Explanation of symbols]

[0083] 10 sheet metal, 10a surface, 10b back surface, 10c screw hole, 11 protrusion, 12, 13 elastic deformation portion, 20 sheet metal, 20a surface, 20b back surface, 20c screw through hole, 21, 23, 25 protrusion, 22, 24, 26 elastic deformation portion, 30 sheet metal, 30a surface, 30b back surface, 30c screw through hole, 31 protrusion, 32 elastic deformation portion, 51 screw.

Claims

1. A structure in which a plurality of sheet metals, each having a conductive base material covered with an insulating film, are stacked in the plate thickness direction, wherein one of the sheet metals adjacent to each other and fastened by a fastening member is provided with one protruding portion that protrudes toward the other sheet metal, in the one sheet metal, one elastic deformation portion is provided so as to surround the periphery of the one protruding portion and elastically deforms when fastened by the fastening member, in the other sheet metal, another protruding portion that protrudes toward the one sheet metal and is arranged so as to intersect the one protruding portion, in the other sheet metal, another elastic deformation portion is provided so as to surround the periphery of the other protruding portion and elastically deforms when fastened by the fastening member, and when fastened by the fastening member, the tip of the one protruding portion and the tip of the other protruding portion are in contact with each other A structure characterized by the above.

2. The one elastic deformation portion, has an asymmetric cross-sectional shape orthogonal to the length direction of the tip of the one protruding portion on both sides thereof with the tip as the center. The structure according to claim 1, characterized by the above.

3. The tip of the one protruding portion, moves toward the side where the deformation amount of the one elastic deformation portion is large with the tip of the one protruding portion as the center. The structure according to claim 2, characterized by the above.

4. The tip of the one protruding portion, moves along the length direction of the tip of the other protruding portion. The structure according to claim 3, characterized by the above.

5. A plurality of sets of the combination of the one protruding portion and the one elastic deformation portion are provided, and one set of the combination of the other protruding portion and the other elastic deformation portion is provided, and each set of the combination of the one protruding portion and the one elastic deformation portion is opposed to each set of the combination of the other protruding portion and the other elastic deformation portion. The structure according to claim 1, characterized by the above.

6. The other protruding portion and the other elastic deformation portion are formed in a circular shape with the fastening member as the center. The structure according to claim 5, characterized by the above.

7. The number of sets of the combination of the one protruding portion and the one elastic deformation portion and the number of sets of the combination of the other protruding portion and the other elastic deformation portion are the same plurality of sets, and each set of the combination of the one protruding portion and the one elastic deformation portion is opposed to each set of the combination of the other protruding portion and the other elastic deformation portion. The structure according to claim 1, characterized by the above.

8. Each set of the one protruding portion and the one elastically deformable portion is arranged at equal angular intervals around the fastening member. The structure according to any one of claims 5 to 7, characterized in that.

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