Seat attachment structure and helmet

Abstract

To provide a seat attachment structure and a helmet that enable simplification of wiring for supplying power to a seat member attached to a shield.SOLUTION: A seat attachment structure includes a shield 20 including a through hole 22, a seat member 30 that covers an inner surface 20S2 of the shield 20, and a second holding part 60 for attaching the sheet member 30 to the shield 20, the seat member 30 including a second recess 31B that engages with the second holding part 60, and a first electrode 33 and a second electrode 34 arranged in a thickness direction of the seat member 30, the second holding part 60 including a first shaft part 61B that fits into the through hole 22, a first terminal 62B that contacts the first electrode 33, a second terminal 64B that contacts the second electrode 34, and a second shaft part 63B that engages with the second recess 31B, in which the first terminal 62B is electrically connected to first external wiring 201 through the through hole 22, and the second terminal 64B is electrically connected to second external wiring 202 through the through hole 22.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] The present invention relates to a seat mounting structure for attaching a seat member to a shield, and a helmet provided with the seat mounting structure.

Background Art

[0002] A motorcycle helmet includes a hemispherical cap body and a shield attached to the cap body. A seat member such as an anti-fog seat or a dimming seat that is electrically controlled by supplying power may be attached to the shield. For example, Patent Document 1 describes a configuration in which a heating device having two electrodes is attached to the inner surface of the shield via a plurality of fixing means. Power is supplied from an external power source disposed on the outer surface side (such as the cap body) of the shield to each electrode included in the heating device via the fixing means.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above-described configuration in which current flows from one fixing means to another fixing means, a wiring for one pole is connected to one fixing means, and a wiring for the other pole is connected to the other fixing means. At this time, one fixing means is disposed at one end of the shield, and the other fixing means is disposed at the other end of the shield. As a result, since the wiring is widely routed from one external power source toward both ends of the shield, simplification of the wiring routing for supplying power to the seat member is required.

Means for Solving the Problems

[0005] A sheet mounting structure for solving the above problems comprises a shield attached to a helmet body, a sheet member covering the inner surface of the shield, and a holding part for attaching the sheet member to the shield, wherein the shield has a through hole to which the holding part is attached, the sheet member has a recess that engages with the holding part, and a first electrode and a second electrode arranged in the thickness direction of the sheet member around the recess, the first electrode surface of the first electrode and the second electrode surface of the second electrode facing each other in opposite directions, the holding part comprises a first shaft portion that fits into the through hole, a first terminal in contact with the first electrode surface, a second terminal facing the first terminal and in contact with the second electrode surface, and a second shaft portion located between the first terminal and the second terminal and engaging with the recess, the first terminal is electrically connected to a first external wiring located outside the shield via the through hole, and the second terminal is electrically connected to a second external wiring located outside the shield via the through hole.

[0006] A helmet for solving the above problems comprises a helmet shell, a shield attached to the helmet shell, a sheet member covering the inner surface of the shield, a retaining part for attaching the sheet member to the shield, and first and second external wiring for supplying power to the sheet member, wherein the shield has a through hole to which the retaining part is attached, and the sheet member has a recess that engages with the retaining part, and a first electrode and a second electrode arranged in the thickness direction of the sheet member around the recess, wherein the first electrode has a first electrode surface and the second electrode The first external wiring and the second external wiring are located outside the shield, the first terminal is electrically connected to the first external wiring via the through hole, and the second terminal is electrically connected to the second external wiring via the through hole.

[0007] According to the above configuration, by providing a first terminal and a second terminal on the holding part, a wiring path that penetrates both the inside and outside of the shield can be constructed using the holding part for attaching the sheet member to the shield. Furthermore, a wiring path that penetrates both the inside and outside of the shield can be realized by a single holding part for each of the two electrodes provided on the sheet member. Therefore, the wiring for supplying power to the sheet member attached to the shield can be simplified.

[0008] In the above sheet mounting structure, the first shaft portion is rotatably fitted into the through hole, the second shaft portion is positioned eccentrically with respect to the first shaft portion, and the holding portion may rotate integrally with the first shaft portion, the first terminal, the second terminal, and the second shaft portion. With the above configuration, when the first shaft portion rotates with respect to the through hole, the second shaft portion rotates such that the eccentric axis, which is the center of the second shaft portion, rotates around the central axis of the first shaft portion. Therefore, by rotating the holding portion, the sheet member attached to the holding portion can be moved within the range of rotation of the second shaft portion. This makes it possible to bring the sheet member and the shield into close contact. Furthermore, since the first electrode surface and the first terminal are in contact, and the second electrode surface and the second terminal are in contact, the electrical connection between the first electrode and the first terminal, and the electrical connection between the second electrode and the second terminal can be maintained even when the holding portion rotates with respect to the through hole.

[0009] In the above-described sheet mounting structure, the first terminal has a first terminal surface that contacts the first electrode surface, and the second terminal has a second terminal surface that faces the first terminal surface and contacts the second electrode surface. The distance between the first terminal surface and the second terminal surface is less than or equal to the distance from the first electrode surface to the second electrode surface, and the first terminal may have an elastic portion that contacts the first electrode surface while elastically deforming. With the above configuration, by making the distance between the first terminal surface and the second terminal surface less than or equal to the distance from the first electrode surface to the second electrode surface, the first electrode surface and the first terminal surface can be reliably brought into contact, and the second electrode surface and the second terminal surface can be reliably brought into contact. Furthermore, by providing an elastic portion to the first terminal, it is possible to facilitate engagement between the recess of the sheet member and the second shaft portion. In addition, by increasing the contact pressure between the first electrode surface and the first terminal surface, the electrical contact reliability of the first electrode and the first terminal, and the second electrode and the second terminal can be improved.

[0010] In the above-described sheet mounting structure, the second shaft portion may be sandwiched between the first terminal surface and the second terminal surface in a direction along the central axis of the holding portion. With this configuration, the first terminal surface and the second terminal surface sandwich the second shaft portion, so that the second shaft portion functions as a spacer that suppresses deformation that would reduce the distance between the first terminal surface and the second terminal surface. Therefore, the distance between the first terminal surface and the second terminal surface can be appropriately maintained.

[0011] In the above sheet mounting structure, the holding portion may include an insulating backing portion that contacts the side of the second terminal opposite to the second shaft portion. With this configuration, excessive deformation of the second terminal can be prevented by supporting the second terminal with the backing portion. Furthermore, short circuits can be prevented by covering the portion of the second terminal that does not contribute to contact with the second electrode with an insulating material. [Effects of the Invention]

[0012] According to the present invention, the wiring for supplying power to the sheet member attached to the shield can be simplified. [Brief explanation of the drawing]

[0013] [Figure 1] Figure 1 is a perspective view of the helmet. [Figure 2] Figure 2 is a perspective view of the seat mounting structure. [Figure 3] Figure 3 is a plan view of the seat member. [Figure 4] Figure 4 is a cross-sectional view taken along line IV-IV of Figure 3. [Figure 5] Figure 5 is a plan view showing an enlarged second recess of the seat member. [Figure 6] Figure 6 is a perspective view of the first holding portion. [Figure 7] Figure 7 is a cross-sectional view of the state where the seat member is attached to the shield via the first holding portion. [Figure 8] Figure 8 is a cross-sectional view showing the state where the first holding portion is rotated 180 degrees from the state shown in Figure 7. [Figure 9] Figure 9 is a schematic diagram of the cross-sectional structure seen from line IX-IX of Figure 8. [Figure 10] Figure 10 is a side view showing each part constituting the second holding portion disassembled. [Figure 11] Figure 11 is a cross-sectional view of the state where the seat member is attached to the shield via the second holding portion. [Figure 12] Figure 12 is a schematic diagram of the cross-sectional structure seen from line XII-XII of Figure 11. [Figure 13] Figure 13 is a schematic diagram showing the state where the second holding portion is rotated 180 degrees from the state shown in Figure 12. [Figure 14] Figure 14 is a cross-sectional view showing a modified example of the second holding portion. [Figure 15] Figure 15 is a plan view showing a modified example of the seat member. [Figure 16] Figure 16 is a perspective view schematically showing the first electrode member. [Figure 17] Figure 17 is a perspective view schematically showing the second electrode member. [Figure 18] Figure 18 is a schematic diagram of the cross-sectional structure seen from line XVIII-XVIII of Figure 15. [Figure 19] FIG. 19 is a schematic diagram of a cross-sectional structure viewed from the XIX-XIX line in FIG. 15.

Embodiments for Carrying out the Invention

[0014] Hereinafter, an embodiment of a helmet having a sheet mounting structure will be described with reference to FIGS. 1 to 19. In FIGS. 1 to 19, front, rear, left, right, up, and down, which are the directions seen from the helmet wearer, are shown as front, rear, left, right, up, and down with respect to the helmet.

[0015] [Helmet] As shown in FIG. 1, the helmet 1 is, for example, a full-face type helmet. The helmet 1 includes a cap body 10 and a shield 20. Note that the helmet 1 may accommodate a liner, which is an impact absorber made of a foamed resin, and a cushioning interior pad for enhancing the adhesion between the wearer's head and the inside of the cap body 10.

[0016] The cap body 10 constitutes the outer shell of the helmet 1. The cap body 10 is a resin member having a hemispherical shape. The material constituting the cap body 10 is selected from, for example, acrylonitrile-butadiene-styrene copolymer (ABS), polycarbonate (PC), and fiber reinforced plastic (FRP). The cap body 10 includes an insertion opening that opens downward for inserting the wearer's head. The cap body 10 includes a visual field opening that opens forward to secure the wearer's visual field.

[0017] The shield 20 is a plate-like member having light transmissivity. The shield 20 is curved so as to follow the curved surface shape of the outer surface of the cap body 10. The shield 20 includes attachment portions 21 at both ends in the left-right direction. The shield 20 is attached to the cap body 10 such that the attachment portions 21 can be rotated upward along the outer surface of the cap body 10 from a state of closing the visual field opening. The shield 20 prevents foreign objects, rain, wind, etc. flying from the front from entering the helmet 1 and improves the visibility of the wearer.

[0018] A sheet member 30 is attached to the shield 20 via a plurality of retaining parts 40. The sheet member 30 is located inside the helmet 1 relative to the shield 20. The shield 20, the sheet member 30, and the plurality of retaining parts 40 constitute a sheet mounting structure.

[0019] The sheet member 30 is, for example, a dimmable sheet that changes the light transmittance of visible light depending on whether or not a voltage is applied. The dimmable sheet reduces glare from sunlight and its reflected light. The sheet member 30 may also be an anti-fog sheet that prevents fogging of the shield 20 due to heat generated when a voltage is applied. The sheet member 30 may also be a liquid crystal display device that displays characters, symbols, diagrams, etc. in response to electrical signals.

[0020] [Seat mounting structure] As shown in Figure 2, the shield 20 comprises an outer surface 20S1 facing outward and an inner surface 20S2 facing inward of the helmet body 10. Each mounting portion 21 is provided with a plurality of mounting pieces 21A protruding from the inner surface 20S2 toward the inside of the helmet body 10. The mounting pieces 21A are a mechanism for rotatably attaching the shield 20 to the helmet body 10 and engage with a rotation mechanism provided on the helmet body 10.

[0021] The shield 20 has through holes 22 at each end in the left-right direction, positioned forward of the mounting portion 21. The through holes 22 penetrate the shield 20 in the thickness direction. The through holes 22 are, for example, circular holes. One retaining portion 40 is attached to each through hole 22.

[0022] A sheet member 30 is attached to the inner surface 20S2 of the shield 20. The sheet member 30 is curved to follow the curved shape of the inner surface 20S2 of the shield 20. The outer shape of the sheet member 30 is smaller than the outer shape of the shield 20. The sheet member 30 has U-shaped recesses 31 at each end in the left-right direction. Each recess 31 engages with a retaining part 40 attached to the through hole 22. In this way, the sheet member 30 is attached to the inner surface 20S2 of the shield 20. The sheet member 30 covers the portion of the inner surface 20S2 of the shield 20 in front of the through hole 22.

[0023] Two retaining parts 40 are attached to the shield 20. One of the two retaining parts 40 is the first retaining part 50. The first retaining part 50 is, for example, an integrally molded insulating resin member. The other of the two retaining parts 40 is the second retaining part 60. The second retaining part 60 has two terminals that are electrically connected to the positive and negative electrodes of the sheet member 30. The second retaining part 60 has metal parts that constitute each terminal and resin parts that insulate each terminal.

[0024] [Sheet material] The sheet member 30 will now be described with reference to Figures 3 to 5. In Figures 3 and 5, the first surface 30S1 of the sheet member 30, which faces the inner surface 20S2 of the shield 20, faces the front side of the paper.

[0025] As shown in Figure 3, in the sheet member 30, one of the two recesses 31 is the first recess 31A. The first recess 31A engages with the first retaining portion 50. The other of the two recesses 31 is the second recess 31B. The second recess 31B engages with the second retaining portion 60.

[0026] The sheet member 30 includes a sealing portion 32. The sealing portion 32 extends endlessly along the periphery of the first surface 30S1 of the sheet member 30. The two recesses 31 are located outward from the sealing portion 32 in the left-right direction. When the sheet member 30 is attached to the shield 20, the sealing portion 32 is in close contact with the inner surface 20S2 of the shield 20. By partitioning a sealed space between the sheet member 30 and the inner surface 20S2, the temperature difference between the inner and outer surfaces of the shield 20 can be reduced, thereby preventing fogging.

[0027] As shown in Figure 4, if the sheet member 30 is a dimmable sheet, the sheet member 30 comprises, for example, two electrode sheets 30A and a dimmable layer 30D. Each electrode sheet 30A comprises an insulating base layer 30B and a conductive electrode layer 30C. The base layer 30B is made of a transparent resin material such as polycarbonate or polyethylene terephthalate. The electrode layer 30C is made of a transparent conductor such as indium tin oxide or a conductive polymer. The dimmable layer 30D is located between the two electrode layers 30C. The dimmable layer 30D comprises a liquid crystal component and a polymer component that holds the liquid crystal component. The liquid crystal component held by the polymer component changes its light transmittance by changing its orientation depending on whether a voltage is applied between the two electrode layers 30C or not.

[0028] The sheet member 30 includes a first electrode 33, a second electrode 34, and an electrode support portion 35 at one end in the left-right direction, arranged in the thickness direction. The first electrode 33, the second electrode 34, and the electrode support portion 35 constitute the second recess 31B. The first electrode 33 is one of the positive and negative electrodes of the sheet member 30. The second electrode 34 is the other of the positive and negative electrodes of the sheet member 30. The first electrode 33 and the second electrode 34 are each electrically connected to terminals of the second holding portion 60.

[0029] The first electrode 33 is composed of, for example, one of two electrode layers 30C and a first plating layer 33A provided on the electrode layer 30C. The second electrode 34 is composed of, for example, the other of two electrode layers 30C and a second plating layer 34A provided on the electrode layer 30C. The first plating layer 33A and the second plating layer 34A include, for example, gold, silver, copper, or tin. The first electrode 33 may be a separate component from the electrode layer 30C and electrically connected to the electrode layer 30C. Similarly, the second electrode 34 may be a separate component from the electrode layer 30C and electrically connected to the electrode layer 30C. Furthermore, the first plating layer 33A and the second plating layer 34A may be omitted.

[0030] The first electrode 33 is provided on the inner surface 20S2 side of the shield 20 relative to the electrode support portion 35. The second electrode 34 is provided on the side opposite to the shield 20 relative to the electrode support portion 35. The electrode support portion 35 is located between the first electrode 33 and the second electrode 34 in the thickness direction of the sheet member 30. The electrode support portion 35 supports the first electrode 33 and the second electrode 34 so as to maintain the distance between them. The electrode support portion 35 is, for example, an insulating resin having higher mechanical strength than the light-adjusting layer 30D.

[0031] The first electrode 33 has a first electrode surface 33S that faces the same direction as the first surface 30S1 that faces the inner surface 20S2 of the shield 20. The second electrode 34 has a second electrode surface 34S that faces the same direction as the second surface 30S2 in the sheet member 30 that is opposite to the first surface 30S1. The first electrode surface 33S and the second electrode surface 34S face in opposite directions. The portion of the sheet member 30 that constitutes the second recess 31B has a predetermined thickness T. The thickness T corresponds to the distance between the first electrode surface 33S and the second electrode surface 34S.

[0032] The sheet member 30 may have an anti-fog treatment applied to at least one of its first surface 30S1 and second surface 30S2. For example, Figure 4 illustrates a configuration in which an anti-fog layer 36 is provided on the first surface 30S1 side of the sheet member 30. The anti-fog layer 36 may be in the form of a sheet, or it may be formed by coating or spraying it onto the first surface 30S1.

[0033] As shown in Figure 5, the first electrode surface 33S is provided along the end face of the second recess 31B, having a predetermined width. The first electrode surface 33S is configured in a horseshoe shape, for example. In Figure 5, dots are marked on the sheet member 30 at the positions where the first electrode surface 33S and the second electrode surface 34S are provided. The second electrode surface 34S has the same shape as the first electrode surface 33S.

[0034] [First holding part] As shown in Figure 6, the first retaining portion 50 has a substantially cylindrical shape extending along the central axis L1. The first retaining portion 50 comprises a head portion 51, a first shaft portion 52, a second shaft portion 53, and an engaged head portion 54. In the first retaining portion 50, the head portion 51, the first shaft portion 52, the second shaft portion 53, and the engaged head portion 54 are arranged in this order along the central axis L1.

[0035] The head portion 51 is located at one end in the direction along the central axis L1. The head portion 51 is the part located outward from the outer surface 20S1 of the shield 20 when the first retaining portion 50 is attached to the shield 20. The head portion 51 has a substantially disc shape with a diameter larger than the through hole 22 provided in the shield 20, with the central axis L1 as the center. The head portion 51 has a marking portion 51A on which a part of its disc shape protrudes in the direction of the outer circumference of the central axis L1.

[0036] The first shaft portion 52 is the part that fits into the through hole 22 of the shield 20 when the first retaining portion 50 is attached to the shield 20. The first shaft portion 52 is rotatably fitted into the through hole 22. The first shaft portion 52 has a substantially cylindrical shape with a central axis L1 as its center, and is the same diameter as or smaller than the through hole 22. The first shaft portion 52 is provided with a slit 52A. The slit 52A divides the first shaft portion 52 into a main shaft portion 52B and an elastic piece 52D at a position offset from the central axis L1 toward the mark portion 51A.

[0037] The main shaft portion 52B is larger than the elastic piece 52D. The second shaft portion 53 is connected to the main shaft portion 52B. In the main shaft portion 52B, the portion on the head 51 side is a reduced-diameter portion with a smaller diameter than the portion on the second shaft portion 53 side. This allows the main shaft portion 52B to be inserted into the through hole 22 while being bent in the direction along the central axis L1 when the first retaining portion 50 is fitted into the through hole 22. The main shaft portion 52B is equipped with a first locking claw 52C that protrudes in the direction of the outer circumference of the central axis L1. In the direction along the central axis L1, the distance between the head 51 and the first locking claw 52C is greater than or equal to the thickness of the shield 20.

[0038] The elastic piece 52D has a free end and is elastically deformable to narrow or widen the slit 52A. The elastic piece 52D is provided with a second locking claw 52E that protrudes from the outer peripheral edge of the free end in the direction of the outer circumference of the central axis L1. In the direction along the central axis L1, the distance between the head 51 and the second locking claw 52E is greater than or equal to the thickness of the shield 20.

[0039] The second shaft portion 53 is the part that protrudes inward from the inner surface 20S2 of the shield 20 to the inside of the helmet body 10 when the first retaining portion 50 is attached to the shield 20. The second shaft portion 53 has a cylindrical shape with a smaller diameter than the first shaft portion 52. The center of the second shaft portion 53 is an eccentric axis L2 that is parallel to the central axis L1 and is offset from the central axis L1 to the opposite side of the marker portion 51A. In other words, the second shaft portion 53 is positioned eccentrically with respect to the first shaft portion 52. The second shaft portion 53 engages with the first recess 31A when the sheet member 30 is attached to the first retaining portion 50.

[0040] The engaged head portion 54 is thicker than the second shaft portion 53 and has a prismatic shape large enough to pass through the through hole 22. For example, the engaged head portion 54 has approximately the same thickness as the first shaft portion 52. The first shaft portion 52, the second shaft portion 53, and the engaged head portion 54 form an annular groove 55 around the second shaft portion 53. The engaged head portion 54 has a non-circular outer surface. The engaged head portion 54 has, for example, a hexagonal prismatic shape centered on the central axis L1.

[0041] As shown in Figure 7, the first retaining portion 50 is inserted into the through hole 22 from the side of the engaged head portion 54. With the first shaft portion 52 fitted into the through hole 22, the first retaining portion 50 clamps the shield 20 between the head portion 51, the first locking claw 52C and the second locking claw 52E. This attaches the first retaining portion 50 to the shield 20. Furthermore, the first retaining portion 50 can be easily attached to the shield 20 by elastically deforming the elastic piece 52D.

[0042] The second shaft portion 53 and the engaged head portion 54 are examples of protrusions that extend inward from the inner surface 20S2 of the helmet body 10 when the first retaining portion 50 is attached to the shield 20. The first recess 31A of the sheet member 30 is fitted into the annular groove 55 of the first retaining portion 50 so as to engage with the second shaft portion 53. At this time, the first retaining portion 50 is positioned such that the mark portion 51A faces forward and the eccentric axis L2 of the second shaft portion 53 is positioned rearward with respect to the central axis L1. The sheet member 30 is also positioned such that the sealing portion 32 faces the inner surface 20S2 of the shield 20.

[0043] As shown in Figure 8, the first retaining part 50 attached to the shield 20 can be rotated around the through hole 22 with the central axis L1 as the axis of rotation by engaging a tool 100 or the like with the engaged head 54. The tool 100 is, for example, a wrench or a spanner. Alternatively, the first retaining part 50 can be rotated by pinching the engaged head 54 with your fingers. When the first retaining part 50 rotates around the through hole 22, the second shaft part 53 rotates around the central axis L1 as its axis of rotation. Therefore, by rotating the first retaining part 50, the shield 20 attached to the first retaining part 50 can be moved within the range of rotation of the second shaft part 53. Note that Figure 8 shows the first retaining part 50 rotated 180 degrees from the state shown in Figure 7.

[0044] In Figure 9, the sheet member 30 and the first holding part 50 in the state shown in Figure 7 are shown by dashed lines, and the sheet member 30 and the first holding part 50 in the state shown in Figure 8 are shown by solid lines. As shown in Figure 9, the sheet member 30 can be moved forward by rotating the first holding part 50 so that the second shaft part 53 is positioned on the rear side (dashed line) relative to the central axis L1, and then on the front side (solid line). Therefore, the sheet member 30 can be sufficiently pressed against the inner surface 20S2 of the shield 20. As a result, the adhesion between the inner surface 20S2 of the shield 20 and the sealing part 32 of the sheet member 30 can be improved. Furthermore, it is possible to change the degree of pressure applied by the sheet member 30 to the shield 20 depending on the degree of curvature of the shield 20. At this time, the position of the second shaft part 53 can be confirmed by the orientation of the marker part 51A, even from the outer surface 20S1 side of the shield 20.

[0045] [Second holding part] As shown in Figure 10, the second holding portion 60 comprises a shaft member 61, a first terminal member 62, an insulating member 63, and a second terminal member 64. The shaft member 61 and the insulating member 63 are insulating members, and for example, are made of thermoplastic resin. The first terminal member 62 and the second terminal member 64 are conductive members, and for example, are made of metals such as copper, nickel, and aluminum, or alloys thereof. The second holding portion 60 as a whole has a substantially cylindrical shape extending along the central axis L3. The shaft member 61, the first terminal member 62, the insulating member 63, and the second terminal member 64 are fixed to each other so that they do not move relative to each other. The second holding portion 60 may be formed by, for example, bonding each member with an adhesive, forming it integrally by insert molding, or forming it integrally by the engagement of protrusions and indentations provided on each member.

[0046] The shaft member 61 comprises a head portion 61A, a first shaft portion 61B, and a flange portion 61C. In the shaft member 61, the head portion 61A, the first shaft portion 61B, and the flange portion 61C are arranged in this order along the central axis L3. The head portion 61A is the part located outward from the outer surface 20S1 of the shield 20 when the second retaining portion 60 is attached to the shield 20. The head portion 61A has a substantially disc shape with a diameter larger than the through hole 22 provided in the shield 20, centered on the central axis L3. The head portion 61A has a marking portion 61A1 on which a part of its disc shape protrudes in the direction of the outer circumference of the central axis L3.

[0047] The first shaft portion 61B is the part that fits into the through hole 22 when the second retaining portion 60 is attached to the shield 20. The first shaft portion 61B is rotatably fitted into the through hole 22. The first shaft portion 61B has a substantially cylindrical shape with a central axis L3 as its center, and a diameter the same as or smaller than that of the through hole 22.

[0048] The flange portion 61C has a substantially disc shape with a larger diameter than the through hole 22. When the second retaining portion 60 is attached to the shield 20, the flange portion 61C is located inside the helmet body 10, beyond the inner surface 20S2 of the shield 20. Therefore, the shaft member 61, with its head portion 61A, first shaft portion 61B, and flange portion 61C, forms an annular groove 61D. The second retaining portion 60 is attached to the shield 20 by the engagement of the annular groove 61D with the through hole 22.

[0049] The shaft member 61 is provided with a head portion 61A, a first shaft portion 61B, and a first through-hole 61E that penetrates the flange portion 61C. The first through-hole 61E extends along the central axis L3. The first through-hole 61E is, for example, a circular hole centered on the central axis L3, but it may have any shape.

[0050] The second retaining portion 60 includes a first elastic support portion 65. The first elastic support portion 65 is located at the end of the shaft member 61 on the flange portion 61C side, in a direction along the central axis L3. The first elastic support portion 65 is made of a material that has a lower Young's modulus than the shaft member 61 and is easily elastically deformed. The first elastic support portion 65 abuts against the first terminal 62B provided on the first terminal member 62. The first elastic support portion 65 is made of, for example, silicone rubber. Note that the first elastic support portion 65 may be omitted.

[0051] The first terminal member 62 comprises a first conductor shaft 62A and a first terminal 62B. The first conductor shaft 62A, for example, has a cylindrical shape centered on a central axis L3. The first conductor shaft 62A is inserted into the first through hole 61E of the shaft member 61. The first terminal 62B is connected to one end of the first conductor shaft 62A. The first terminal 62B has a flattened, substantially disc shape centered on a central axis L3. The first terminal 62B is sized to pass through the through hole 22 and has a larger diameter than the first conductor shaft 62A.

[0052] The first terminal 62B comprises a first terminal surface 62S1 and a first supported surface 62S2. The first terminal surface 62S1 is the surface of the first terminal 62B opposite to the first conductor shaft 62A. The first supported surface 62S2 is the surface of the first terminal 62B on the first conductor shaft 62A side and is the surface opposite to the first terminal surface 62S1. The first supported surface 62S2 contacts the first elastic support portion 65 when the first conductor shaft 62A is inserted into the first insertion hole 61E. The first terminal surface 62S1 may be provided with the same type of plating as the first plating layer 33A.

[0053] The first terminal member 62 is provided with a second through-hole 62C that penetrates the first conductor shaft 62A and the first terminal 62B. The second through-hole 62C extends along the central axis L3. The second through-hole 62C is, for example, a circular hole centered on the central axis L3, but it may have any shape.

[0054] The insulating member 63 comprises an insulating shaft 63A and a second shaft portion 63B. The insulating shaft 63A, for example, has a cylindrical shape centered on a central axis L3. The insulating shaft 63A is inserted into the second insertion hole 62C of the first terminal member 62. The second shaft portion 63B has a cylindrical shape with a larger diameter than the insulating shaft 63A and a smaller diameter than the first shaft portion 61B and the first terminal 62B. The second shaft portion 63B is connected to one end of the insulating shaft 63A. The center of the second shaft portion 63B is an eccentric shaft L4 that is parallel to the central axis L3 and offset from the central axis L3 to the side opposite the mark portion 61A1. That is, the second shaft portion 63B is eccentric with respect to the first shaft portion 61B. The second shaft portion 63B is in contact with the first terminal surface 62S1. The second shaft portion 63B engages with the second recess 31B when the sheet member 30 is attached to the second holding portion 60.

[0055] The insulating member 63 is provided with a third through-hole 63C that penetrates the insulating shaft 63A and the second shaft portion 63B. The third through-hole 63C extends along the central axis L3. The third through-hole 63C is, for example, a circular hole centered on the central axis L3, but it may have any shape.

[0056] The second terminal member 64 comprises a second conductor shaft 64A and a second terminal 64B. The second conductor shaft 64A, for example, has a cylindrical shape centered on a central axis L3. The second conductor shaft 64A is inserted into the third insertion hole 63C of the insulating member 63. The second terminal 64B is connected to one end of the second conductor shaft 64A. The second terminal 64B has a flattened prismatic shape centered on a central axis L3. The second terminal 64B is thicker than the second conductor shaft 64A and the second shaft portion 63B, and is large enough to pass through the through hole 22. The thickness of the second terminal 64B is, for example, equal to the thickness of the first terminal 62B. The second terminal 64B has a non-circular outer surface. The second terminal 64B is, for example, hexagonal prismatic.

[0057] The second terminal 64B comprises a second terminal surface 64S1 and a second supported surface 64S2. The second terminal surface 64S1 is the surface of the second terminal 64B that faces the second conductor shaft 64A. The second supported surface 64S2 is the surface of the first terminal 62B opposite to the second terminal surface 64S1. The second terminal surface 64S1 contacts the second shaft portion 63B of the insulating member 63 when the second conductor shaft 64A is inserted into the third insertion hole 63C. The second terminal surface 64S1 may be provided with the same type of plating as the second plating layer 34A.

[0058] The second holding portion 60 includes a backing portion 66. The backing portion 66 is provided on the second supported surface 64S2 side with respect to the second terminal 64B. The backing portion 66 is made of, for example, an insulating resin. As an example, the backing portion 66 is made of the same type of resin material as the shaft member 61. As an example, the backing portion 66 is configured to be thicker than the second terminal 64B. The backing portion 66 prevents excessive deformation of the second terminal 64B by supporting the second terminal 64B. The backing portion 66 may be omitted.

[0059] The second holding portion 60 includes a second elastic support portion 67. The second elastic support portion 67 is provided between the second terminal 64B and the backing portion 66. The second elastic support portion 67 is made of a material that has a lower Young's modulus and is more easily elastically deformed than the backing portion 66. The second elastic support portion 67 abuts against the second supported surface 64S2 of the second terminal 64B. The second elastic support portion 67 is made of, for example, silicone rubber. The backing portion 66 and the second elastic support portion 67 are configured in a hexagonal prism shape, similar to the second terminal 64B. The second elastic support portion 67 may be omitted.

[0060] As shown in Figure 11, the second retaining part 60 is attached to the shield 20 by fitting the annular groove 61D, which is composed of the head portion 61A, the first shaft portion 61B, and the flange portion 61C, into the through hole 22. The second retaining part 60 is configured to be detachable from the shield 20. For example, the second retaining part 60 may have a reduced diameter portion on the shaft member 61, similar to the first retaining part 50, to facilitate attachment and detachment from the shield 20.

[0061] The first conductor shaft 62A, the insulating shaft 63A, and the second conductor shaft 64A extend from the inner surface 20S2 side to the outer surface 20S1 side of the shield 20 through the first insertion hole 61E of the shaft member 61. The first conductor shaft 62A and the second conductor shaft 64A are insulated by the insulating shaft 63A in the first insertion hole 61E.

[0062] The first conductor shaft 62A is connected to the external power supply 200 via the first external wiring 201. The second conductor shaft 64A is connected to the external power supply 200 via the second external wiring 202. The external power supply 200 is, for example, a secondary battery such as a lithium-ion secondary battery mounted on the helmet shell 10, but it may also be a primary battery. The external power supply 200 has, for example, a switch that switches between a state that outputs power and a state that does not output power. The external power supply 200 is located, for example, on the outer surface 20S1 of the shield 20 near the mounting portion 21 that does not obstruct the view, so that the wearer can operate the switch while wearing the helmet. By placing the external power supply 200 on the outer surface 20S1 of the shield 20, excessive external force (tension) is prevented from being applied to the first external wiring 201 and the second external wiring 202 when the shield 20 is rotated.

[0063] The first external wiring 201 and the second external wiring 202 are wirings for supplying power to the sheet member 30, and are, for example, electric wires. The first external wiring 201 and the second external wiring 202 are located on the outside of the helmet body 10 and the shield 20. Note that the first external wiring 201 and the second external wiring 202 are not directly connected to the external power supply 200, but may be connected to, for example, a controller mounted on the outside of the helmet body 10 or on the outer surface 20S1 of the shield 20. In this case, for example, the controller is connected to the external power supply 200.

[0064] The first terminal 62B, the second shaft portion 63B, and the second terminal 64B are examples of protrusions within the second holding portion 60 that extend from the inner surface 20S2 of the shield 20 toward the inside of the helmet body 10. The second shaft portion 63B is sandwiched between the first terminal surface 62S1 and the second terminal surface 64S1 in a direction along the central axis L3. The first terminal 62B and the second terminal 64B are insulated by the second shaft portion 63B. The first terminal 62B, the second shaft portion 63B, and the second terminal 64B form an annular groove 68 around the second shaft portion 63B.

[0065] The first terminal surface 62S1 and the second terminal surface 64S1 are positioned opposite each other. The distance D between the first terminal surface 62S1 and the second terminal surface 64S1 corresponds to the thickness of the second shaft portion 63B in the direction of the eccentric axis L4. That is, the second shaft portion 63B functions as a spacer to define the distance D. The distance D is less than or equal to the thickness T of the portion constituting the second recess 31B of the sheet member 30. The distance D corresponds to the width of the annular groove 68.

[0066] The second recess 31B is fitted into the annular groove 68. The second recess 31B engages with the second shaft portion 63B. The first terminal surface 62S1 contacts the first electrode surface 33S. This electrically connects the first terminal member 62 and the first electrode 33. The second terminal surface 64S1 contacts the second electrode surface 34S. This electrically connects the second terminal member 64 and the second electrode 34.

[0067] When the first terminal 62B and the first electrode 33 come into contact, the first elastic support portion 65 flexes, making the first terminal 62B more susceptible to elastic deformation. This makes it easier to fit the second recess 31B into the annular groove 68. Furthermore, by increasing the contact pressure between the first terminal surface 62S1 and the first electrode surface 33S, the electrical contact reliability between the first terminal 62B and the first electrode 33 can be improved. Similarly, when the second terminal 64B and the second electrode 34 come into contact, the second elastic support portion 67 flexes, making it easier to fit the second recess 31B into the annular groove 68 and improving the electrical contact reliability between the second terminal 64B and the second electrode 34. In other words, the portion of the first terminal 62B supported by the first elastic support portion 65 is an example of an elastic portion that contacts the first electrode surface 33S while undergoing elastic deformation. Furthermore, the portion of the second terminal 64B supported by the second elastic support portion 67 is an example of an elastic portion that contacts the second electrode surface 34S while undergoing elastic deformation.

[0068] Furthermore, similar to the first holding part 50, the second holding part 60 can be rotated around the through hole 22 with respect to the central axis L1 by engaging a tool 100 or the like with the backing part 66. That is, by rotating the backing part 66, the shaft member 61, the first terminal member 62, the insulating member 63, and the second terminal member 64 rotate together. This allows the shield 20 attached to the second holding part 60 to be moved within the range of rotation of the second shaft part 63B. Therefore, by sufficiently pressing the sheet member 30 toward the inner surface 20S2 of the shield 20, the adhesion between the inner surface 20S2 and the seal part 32 can be improved. It is also possible to change the degree of pressure of the sheet member 30 toward the shield 20 according to the degree of curvature of the shield 20. Note that by constructing the first external wiring 201 and the second external wiring 202 with electric wires, the rotation of the second holding part 60 can be avoided.

[0069] Figures 12 and 13 illustrate the relationship between the positions of the second shaft portion 63B and the sheet member 30 and the contact area between the first electrode 33 and the first terminal 62B. The contact configuration between the second electrode 34 and the second terminal 64B is the same as that between the first electrode 33 and the first terminal 62B. In Figures 12 and 13, the first terminal 62B is marked with a light dot, the first electrode 33 with a dot of medium density, and the overlapping area between the first terminal 62B and the first electrode 33 is marked with a dark dot.

[0070] As shown in Figure 12, when the second shaft portion 63B is positioned forward, the overlapping area between the first terminal 62B and the first electrode 33 becomes relatively smaller. On the other hand, as shown in Figure 13, when the second shaft portion 63B is positioned backward, the overlapping area between the first terminal 62B and the first electrode 33 becomes relatively larger. In other words, when the second holding portion 60 rotates, the overlapping area between the first terminal 62B and the first electrode 33 changes. Therefore, the sizes of the first electrode 33 and the first terminal 62B should be determined so that the minimum area necessary for electrical connection between the first terminal 62B and the first electrode 33 is secured in any state when the second holding portion 60 is rotated.

[0071] The method for attaching the sheet member 30 to the shield 20 is as follows: First, before attaching the shield 20 to the helmet shell 10, the two retaining parts 40 are attached to the shield 20. At this time, each retaining part 40 is attached so that the marking parts 51A and 61A1 face the center of the shield 20 in the left-right direction. Then, the sheet member 30 is attached to one of the retaining parts 40. With the curved shape of the shield 20 widened, the sheet member 30 is attached to the other retaining part 40. After that, each retaining part 40 is rotated according to the degree of contact between the sheet member 30 and the shield 20 to ensure a tight fit. The sheet member 30 is attached to the shield 20 by following these steps.

[0072] In addition, the shield 20 can be fitted with a sheet without electrodes (for example, an anti-fog sheet with an anti-fogging treatment on its surface) instead of the sheet member 30 having positive and negative electrodes. In this case, both of the two holding parts 40 may be replaced with the first holding part 50 instead of the second holding part 60.

[0073] [Effects of the Embodiment] According to the above embodiment, the following effects can be obtained. (1) By having the second holding portion 60 equipped with the first terminal 62B and the second terminal 64B, a wiring path that penetrates both the inside and outside of the shield 20 can be realized by a single second holding portion 60 for each of the first electrode 33 and the second electrode 34. As a result, the first external wiring 201 and the second external wiring 202 for supplying power to the sheet member 30 can be simplified. For example, the wiring path of the first external wiring 201 or the second external wiring 202 can be shortened compared to when the positive and negative electrodes of the sheet member 30 are connected separately to the two holding portions 40.

[0074] (2) By positioning the second shaft portion 63B eccentrically with respect to the first shaft portion 61B, the sheet member 30 can be moved within the range of rotation of the second shaft portion 63B by rotating the second holding portion 60. This allows the shield 20 and the sheet member 30 to be brought into close contact. Furthermore, even when the second holding portion 60 rotates relative to the through hole 22, the electrical connection between the first electrode 33 and the first terminal 62B, and the electrical connection between the second electrode 34 and the second terminal 64B can be maintained.

[0075] (3) By providing the second holding portion 60 with the first elastic support portion 65, it is possible to facilitate engagement between the second recess 31B of the sheet member 30 and the second shaft portion 63B. Furthermore, by increasing the contact pressure between the first electrode surface 33S and the first terminal surface 62S1, the electrical contact reliability between the first electrode 33 and the first terminal 62B can be improved. In addition, by increasing the contact pressure between the first electrode surface 33S and the first terminal surface 62S1, the contact pressure between the second electrode surface 34S and the second terminal surface 64S1 is also increased by the reaction force, thereby improving the electrical contact reliability between the second electrode 34 and the second terminal 64B. Furthermore, by providing the second holding portion 60 with both the first elastic support portion 65 and the second elastic support portion 67, the above effects can be further enhanced.

[0076] (4) The first terminal surface 62S1 and the second terminal surface 64S1 sandwich the second shaft portion 63B, so that the second shaft portion 63B functions as a spacer that suppresses deformation that reduces the distance D between the first terminal surface 62S1 and the second terminal surface 64S1. Therefore, the distance D can be maintained appropriately.

[0077] (5) By providing a backing portion 66 on the second holding portion 60, excessive deformation of the second terminal 64B is prevented. Furthermore, by covering the portion of the second terminal 64B that does not contribute to contact with the second electrode 34 with an insulating material, short circuits can be prevented.

[0078] [Example of changes] The above embodiment can be implemented with the following modifications. Furthermore, the following modifications can be combined to the extent that they do not contradict the technical standards.

[0079] - If the second terminal 64B is thick, or if its strength is sufficient and it does not deform excessively, the backing portion 66 may not be provided. In this case, the second elastic support portion 67 may also be omitted. In this case, the second supported surface 64S2 may be covered with an insulating layer so that it is not exposed to the inside of the helmet body 10.

[0080] The example given illustrates a configuration in which the first terminal surface 62S1 and the second terminal surface 64S1 sandwich the second shaft portion 63B. However, the example is not limited to this, and as shown in Figure 14, for example, in the first terminal member 62, the first terminal 62B may be positioned adjacent to the outer circumferential surface of the second shaft portion 63B, and a step 62D may be provided connecting the first conductor shaft 62A and the first terminal 62B. In this case, the second shaft portion 63B is sandwiched between the step 62D and the second terminal surface 64S1 of the first terminal member 62. Even in this case, the distance D between the first terminal surface 62S1 and the second terminal surface 64S1 can be appropriately maintained. Compared to the above configuration, in the configuration in which the first terminal surface 62S1 and the second terminal surface 64S1 sandwich the second shaft portion 63B, the configuration of the first terminal member 62 can be simplified by the fact that the first terminal member 62 does not have a step 62D. Furthermore, the second terminal member 64 may also be provided with a configuration equivalent to the step 62D.

[0081] The second holding portion 60 may be configured to include only one of the first elastic support portion 65 and the second elastic support portion 67. Even in this case, it is possible to facilitate engagement between the second recess 31B of the sheet member 30 and the second shaft portion 63B, and to improve the electrical contact reliability of the first electrode 33 and the first terminal 62B, and the second electrode 34 and the second terminal 64B.

[0082] The first terminal 62B may have a protrusion that is partially curved in the thickness direction so as to protrude toward the first electrode surface 33S. The protrusion is formed, for example, by embossing. In this case, the pressure at which the protrusion of the first terminal 62B contacts the first electrode surface 33S can be partially increased. This can improve electrical contact reliability. Also, the bending of the protrusion when the first terminal 62B and the first electrode 33 make contact makes it easier to fit the second recess 31B into the annular groove 68. The protrusion of the first terminal 62B is an example of an elastic part that contacts the first electrode surface 33S while elastically deforming. The protrusion may be point-shaped, linear, or annular, surrounding the first conductor shaft 62A, and may be one or multiple. In this case, the second retaining part 60 does not need to have the first elastic support part 65. Similarly, the second terminal 64B may have a protrusion. The protrusion on the second terminal 64B is also an example of an elastic part. In this case, the second retaining part 60 does not need to include the second elastic support part 67.

[0083] The first terminal 62B may have an inclined portion that slopes outward from the connection point with the first conductor shaft 62A toward the first electrode surface 33S. In this case, the contact pressure with the first electrode surface 33S can be partially increased at the tip of the inclined portion. This can improve electrical contact reliability. Also, the inclined portion flexes when the first terminal 62B and the first electrode 33 come into contact, making it easier to fit the second recess 31B into the annular groove 68. The inclined portion of the first terminal 62B is an example of an elastic portion that contacts the first electrode surface 33S while elastically deforming. In this case, the second retaining portion 60 does not need to have the first elastic support portion 65. Similarly, the second terminal 64B may have an inclined portion. The inclined portion of the second terminal 64B is also an example of an elastic portion. In this case, the second retaining portion 60 does not need to have the second elastic support portion 67.

[0084] The second retaining portion 60 does not necessarily have to include the first elastic support portion 65 and the second elastic support portion 67. In this case, the second recess 31B is press-fitted into the annular groove 68. In this configuration, the first terminal 62B and the second terminal 64B may have protrusions that partially increase in thickness. In this case, the protrusions on the first terminal 62B can partially increase the pressure in contact with the first electrode 33, and prevent the force required to fit the second recess 31B into the annular groove 68 from becoming excessively high. Similarly, the protrusions on the second terminal 64B can partially increase the pressure in contact with the second electrode 34. The protrusions may be point-shaped or linear. There may be one protrusion or multiple protrusions.

[0085] The second shaft portion 63B may not be positioned eccentrically with respect to the first shaft portion 61B, but rather its center may be on the central axis L3. In this case, regardless of the orientation in which the second retaining portion 60 is attached to the through hole 22, the contact area between the first electrode 33 and the first terminal 62B, and the contact area between the second electrode 34 and the second terminal 64B can be kept constant. Even in this case, the contact between the shield 20 and the sheet member 30 can be improved by rotating the first retaining portion 50.

[0086] - At least one of the two retaining parts 40 may be the second retaining part 60, for example, both of the two retaining parts 40 may be the second retaining part 60. In this case, the first recess 31A may be provided with an electrode to constitute an electrical circuit separate from the first electrode 33 and the second electrode 34, or it may not be provided with an electrode. Alternatively, the end of the sheet member 30 on the side of the first recess 31A may be attached to the shield 20 by other means without using the first retaining part 50 of the two retaining parts 40. For example, a retaining pin that engages with the first recess 31A may be integrally formed with the shield 20. Alternatively, the end of the sheet member 30 on the side of the first recess 31A may be attached to the shield 20 with an adhesive. In this case, the shield 20 does not need to have a through hole 22 on the side of the first retaining part 50, and the sheet member 30 does not need to have the first recess 31A.

[0087] The shape of the first terminal 62B is not limited as long as it can ensure a sufficient contact area with the first electrode 33. For example, the first terminal 62B may have a disc shape with a part of it cut out. Similarly, the shape of the second terminal 64B is not limited as long as it can ensure a sufficient contact area with the second electrode 34.

[0088] The shape of the first conductor shaft 62A is not limited, as long as it is configured to connect the first terminal 62B to the first external wiring 201. For example, the first conductor shaft 62A is not cylindrical, but may be rectangular or sheet-shaped. Also, the first terminal member 62 does not need to have a first conductor shaft 62A, as long as it can connect the first terminal 62B to the first external wiring 201. For example, the first terminal 62B and the first external wiring 201 may be electrically connected inside the first through hole 61E. That is, the first terminal 62B may be electrically connected to the first external wiring 201 via the through hole 22. Similarly, the shape of the second conductor shaft 64A is not limited, and the second terminal member 64 does not need to have a second conductor shaft 64A.

[0089] The first electrode 33 and the second electrode 34 are not limited to the configuration shown in Figure 4. An alternative example of the sheet member 30 will be described below with reference to Figures 15 to 19. As shown in Figure 15, the sheet member 30 comprises a first electrode member 70 constituting the first electrode 33 and a second electrode member 80 constituting the second electrode 34. The first electrode member 70 and the second electrode member 80 are separate from the electrode layer 30C provided by the sheet member 30. The first electrode member 70 is electrically connected to one of the two electrode layers 30C. The second electrode member 80 is electrically connected to the other of the two electrode layers 30C.

[0090] As shown in Figure 16, the first electrode member 70 is constructed by laminating a conductive first conductor layer 70A and a resin first insulating layer 70B. The first conductor layer 70A may be, for example, a metal foil bonded to the first insulating layer 70B, a metal plated onto the first insulating layer 70B, or a metal deposited onto the first insulating layer 70B by sputtering or the like.

[0091] The first electrode member 70 comprises a first electrode portion 71, a first bent portion 72, and a first connecting portion 73. The first electrode portion 71 is the portion exposed on the first surface 30S1 side of the sheet member 30. The first electrode portion 71 is configured, for example, in a horseshoe shape. The first bent portion 72 and the first connecting portion 73 are portions extending from one end of the first electrode portion 71. The boundary between the first electrode portion 71 and the first bent portion 72, and the boundary between the first bent portion 72 and the first connecting portion 73, are bent at approximately right angles such that the first conductor layer 70A forms the peak and the first insulating layer 70B forms the valley, respectively.

[0092] As shown in Figure 17, the second electrode member 80 is constructed by laminating a second conductor layer 80A and a second insulating layer 80B. The layer configuration of the second electrode member 80 is the same as that of the first electrode member 70. The second electrode member 80 comprises a second electrode portion 81, a second bent portion 82, and a second connecting portion 83. The second electrode portion 81 is the portion exposed on the second surface 30S2 side of the sheet member 30. The second electrode portion 81 has the same shape as the first electrode portion 71, and as an example, is configured in a horseshoe shape. The second bent portion 82 and the second connecting portion 83 are portions that extend from one end of the second electrode portion 81. The boundary between the second electrode portion 81 and the second bent portion 82, and the boundary between the second bent portion 82 and the second connecting portion 83 are bent at approximately right angles such that the second conductor layer 80A is the peak and the second insulating layer 80B is the valley, respectively.

[0093] As shown in Figure 18, the sheet member 30 comprises a sealing layer 30E and an adhesive layer 30F between two electrode layers 30C. The sealing layer 30E is, for example, an insulating resin. The sealing layer 30E is provided around the entire circumference of the end face of the dimming layer 30D. By covering the end face of the dimming layer 30D, the sealing layer 30E prevents the liquid crystal components of the dimming layer 30D from being exposed to the outside and also prevents the liquid crystal components from degrading due to moisture, etc. The adhesive layer 30F is an insulating adhesive. The adhesive layer 30F increases the bonding strength between the two electrode sheets 30A.

[0094] The first electrode member 70 is bonded to the end of the electrode sheet 30A on the first surface 30S1 side using an adhesive or the like so that the first insulating layer 70B and the electrode sheet 30A are in contact. The first electrode portion 71 is located on the same side as the first surface 30S1. The first conductor layer 70A of the first electrode portion 71 constitutes the first electrode surface 33S. The first bent portion 72 is located on the end face of the sheet member 30 and constitutes the second recess 31B. The first connecting portion 73 is positioned between the two electrode layers 30C. The first conductor layer 70A of the first connecting portion 73 is electrically and mechanically connected to the electrode layer 30C of the electrode sheet 30A on the second surface 30S2 side, for example, by a conductive adhesive or the like.

[0095] As shown in Figure 19, the second electrode member 80 is bonded to the end of the electrode sheet 30A on the second surface 30S2 side using an adhesive or the like so that the second insulating layer 80B and the electrode sheet 30A are in contact. The second electrode portion 81 is located on the same side as the second surface 30S2. The second conductor layer 80A of the second electrode portion 81 constitutes the second electrode surface 34S. The second bent portion 82 is located on the end face of the sheet member 30 and constitutes the second recess 31B. The second connection portion 83 is positioned between the two electrode layers 30C. The second conductor layer 80A of the second connection portion 83 is electrically and mechanically connected to the electrode layer 30C of the electrode sheet 30A on the first surface 30S1 side, for example, by a conductive adhesive or the like. Thus, even when the first electrode member 70 and the second electrode member 80, which are separate from the electrode layer 30C of the sheet member 30, are used, the first electrode 33 and the second electrode 34 of the sheet member 30 can be constructed.

[0096] The helmet 1 can be any helmet equipped with a shield 20. For example, it may be a flip-up helmet with a chin guard that can be raised, an open-face helmet, a helmet with a detachable chin guard, or a convertible helmet with a chin guard that can be rotated and secured to the back of the head. [Explanation of symbols]

[0097] 1…Helmet 10…Helmet shell 20...Shield 20S2…Inner self 22…Through hole 30…Sheet material 31A...First recess 31B...Second recess 33...1st electrode 33S…1st electrode surface 34…Second electrode 34S…Second electrode surface 40...Holding part 50...First holding part 60…Second holding part 61...Head 52,61B…1st shaft part 62B... Terminal 1 53,63B…Second shaft part 64B…2nd terminal 201...First external wiring 202...Second external wiring

Claims

1. The helmet includes a shield attached to a cap body, a sheet member covering an inner surface of the shield, and a holding portion for attaching the sheet member to the shield, the shield has a through hole to which the holding portion is attached, the sheet member includes a recess that engages with the holding portion, and a first electrode and a second electrode that are aligned in a thickness direction of the sheet member around the recess, a first electrode surface of the first electrode and a second electrode surface of the second electrode facing in opposite directions to each other; the holding portion includes a first shaft portion that fits into the through hole, a first terminal that contacts the first electrode surface, a second terminal that faces the first terminal and contacts the second electrode surface, and a second shaft portion that is located between the first terminal and the second terminal and engages with the recess, the first terminal is electrically connected to a first external wiring located outside the shield via the through hole; The second terminal is electrically connected to a second external wiring located outside the shield via the through hole. Seat mounting structure.

2. the first shaft portion is rotatably fitted into the through hole, the second shaft portion is positioned eccentrically with respect to the first shaft portion, The holding portion rotates the first shaft portion, the first terminal, the second terminal, and the second shaft portion together. The seat mounting structure according to claim 1 .

3. the first terminal has a first terminal surface in contact with the first electrode surface, the second terminal has a second terminal surface facing the first terminal surface and in contact with the second electrode surface; a distance between the first terminal surface and the second terminal surface is equal to or less than a distance from the first electrode surface to the second electrode surface; The first terminal has an elastic portion that comes into contact with the first electrode surface while elastically deforming. The seat mounting structure according to claim 1 or 2.

4. The second shaft portion is sandwiched between the first terminal surface and the second terminal surface in a direction along the central axis of the holding portion. The seat mounting structure according to claim 3.

5. The holding portion includes an insulating lining portion that contacts the surface of the second terminal opposite to the second shaft portion. The seat mounting structure according to claim 1 or 2.

6. a cap body, a shield attached to the cap body, a sheet member covering an inner surface of the shield, a holding portion for attaching the sheet member to the shield, and first and second external wiring for supplying power to the sheet member, the shield has a through hole to which the holding portion is attached, the sheet member includes a recess that engages with the holding portion, and a first electrode and a second electrode that are aligned in a thickness direction of the sheet member around the recess, a first electrode surface of the first electrode and a second electrode surface of the second electrode facing in opposite directions to each other; the holding portion includes a first shaft portion that fits into the through hole, a first terminal that contacts the first electrode surface, a second terminal that faces the first terminal and contacts the second electrode surface, and a second shaft portion that is located between the first terminal and the second terminal and engages with the recess, the first external wiring and the second external wiring are located outside the shield, the first terminal is electrically connected to the first external wiring through the through hole; The second terminal is electrically connected to the second external wiring through the through hole. helmet.

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