Sheet mounting structure and helmet

Abstract

A sheet mounting structure is provided with: a shield having a through hole; a sheet member covering an inner surface of the shield; and a holding part for attaching the sheet member to the shield, the sheet member being provided with a recessed part that engages with the holding part, and a first electrode and a second electrode that are arranged in the thickness direction of the sheet member, the holding part being provided with: a first shaft part that fits into the through-hole; a first terminal in contact with the first electrode; the first terminal is in contact with the first electrode, the second terminal is in contact with the second electrode, the second shaft part is clamped with the concave part, the first terminal is electrically connected with the first external wiring through the through hole, and the second terminal is electrically connected with the second external wiring through the through hole.

Description

Technical Field

[0001] The present invention relates to a sheet mounting structure for mounting a sheet member on a hood and a helmet having the sheet mounting structure. Background Art

[0002] A motorcycle helmet includes a hemispherical cap body and a shield mounted on the cap body. Sometimes, a sheet member such as an anti-fog sheet and a dimming sheet that are electrically controlled by power supply is installed on the shield. For example, Patent Document 1 describes a structure in which a heating device having two electrodes is mounted on the inner surface of the shield via a plurality of fixings. Power is supplied to each electrode of the heating device from an external power source arranged on the outer surface side of the shield (cap body, etc.) via fixings. Prior art literature Patent Literature

[0003] Patent Document 1: Japanese Patent Application Publication No. 2001-20123 Summary of the invention Problems to be solved by the invention

[0004] In the above-mentioned structure in which current flows from one fixing member to the other fixing member, a wiring for one pole is connected to one fixing member, and a wiring for the other pole is connected to the other fixing member. In this case, one fixing member is arranged at one end of the shield, and the other fixing member is arranged at the other end of the shield. As a result, the wiring is widely routed from an external power source toward both ends of the shield. It is required to simplify the routing of the wiring for supplying power to the sheet member. Solutions to Solve Problems

[0005] According to one embodiment of the present invention, a sheet mounting structure comprises: a shield configured to be mounted on a cap body; a sheet member covering the inner surface of the shield; and a holding portion for mounting the sheet member on the shield, the shield comprising a through hole for mounting the holding portion, the sheet member comprising a recess engaged with the holding portion, and a first electrode and a second electrode arranged around the recess in a thickness direction of the sheet member, the first electrode surface provided by the first electrode and the second electrode surface provided by the second electrode facing in opposite directions to each other, the holding portion comprising: a first shaft portion engaged with the through hole; a first terminal in contact with the first electrode surface; a second terminal opposed to 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 engaged with the recess, the first terminal being configured to be electrically connected to a first external wiring located outside the shield via the through hole, and the second terminal being configured to be electrically connected to a second external wiring located outside the shield via the through hole.

[0006] According to one embodiment of the present invention, a helmet comprises: a cap body; a shield mounted on the cap body; a sheet member covering the inner surface of the shield; a retaining portion for mounting the sheet member on the shield; and a first external wiring and a second external wiring for supplying power to the sheet member, the shield comprising a through hole for mounting the retaining portion, the sheet member comprising a recess engaged with the retaining portion, and a first electrode and a second electrode arranged around the recess in a thickness direction of the sheet member, the first electrode comprising a first electrode surface and the second electrode comprising a second electrode surface. The two electrode surfaces face in opposite directions to each other, and the holding portion comprises: a first shaft portion, which is engaged with the through hole; a first terminal, which is in contact with the first electrode surface; a second terminal, which is opposite to the first terminal and in contact with the second electrode surface; and a second shaft portion, which is located between the first terminal and the second terminal and is engaged with the recessed portion, 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a three-dimensional image of a helmet. Figure 2 It is a three-dimensional diagram of the installation structure. Figure 3 It is a top view of the sheet member. Figure 4 is from Figure 3 A cross-sectional view taken along line IV-IV. Figure 5 It is a plan view showing the second recessed portion of the sheet member in an enlarged manner. Figure 6 It is a perspective view of the first holding part. Figure 7 It is a cross-sectional view showing a state in which the sheet member is attached to the shield via the first holding portion. Figure 8 It is shown that the first holding portion is Figure 7 The illustrated state is a cross-sectional view of a state rotated 180 degrees. Fig. 9 is from Figure 8 Schematic diagram of the cross-sectional structure viewed along line IX-IX. Fig.10 It is a side view showing the parts constituting the second holding portion in an exploded manner. Fig.11 It is a cross-sectional view showing a state in which the sheet member is attached to the shield via the second holding portion. Fig.12 is from Fig.11 Schematic diagram of the cross-sectional structure viewed from line XII-XII. Fig.13 It is shown that the second holding portion is Fig.12 The state shown is a schematic diagram of the state rotated 180 degrees. Fig.14 It is a cross-sectional view showing a modified example of the second holding portion. Fig.15 It is a plan view showing a modified example of the sheet member. Fig.16 It is a perspective view schematically showing the first electrode member. Fig.17 It is a perspective view schematically showing the second electrode member. Fig.18 is from Fig.15 Schematic diagram of the cross-sectional structure viewed along line XVIII-XVIII. Fig.19 is from Fig.15 Schematic diagram of the cross-sectional structure viewed along line XIX-XIX. DETAILED DESCRIPTION

[0008] Below, refer to Figures 1 to 19 An embodiment of a helmet having a sheet mounting structure is described. Figures 1 to 19 , the front, back, left, right, top and bottom as directions viewed from a helmet wearer are expressed as the front, back, left, right, top and bottom relative to the helmet.

[0009] [helmet] like Figure 1 As shown, as an example, the helmet 1 is a full face helmet. The helmet 1 includes a cap body 10 and a shield 20. In addition, the helmet 1 may also contain an inner lining and a cushioning inner pad inside the cap body 10, wherein the inner lining is a shock absorber made of a foamed resin, and the inner pad improves the fit with the wearer's head.

[0010] The cap body 10 constitutes the outer shell of the helmet 1. The cap body 10 is a resin member having a hemispherical surface. 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 has an insertion port that opens downward for the wearer's head to enter. The cap body 10 has a field of view opening that opens forward for ensuring the wearer's field of view.

[0011] The shield 20 is a plate-like member having light transmittance. The shield 20 is bent in a manner that follows the curved shape of the outer surface of the cap body 10. The shield 20 has two mounted portions 21 at the left end and the right end, respectively. The mounted portions 21 are mounted on the cap body 10 in a manner that the shield 20 can switch from a state of closing the visual field opening to a state of being able to rotate upward along the outer surface of the cap body 10. The shield 20 prevents foreign objects, rain, wind, etc. flying from the front from entering the helmet 1, thereby improving the wearer's visual recognition.

[0012] The sheet member 30 is attached to the shield 20 via a plurality of holding portions 40. The sheet member 30 is located on the inner side of the helmet 1 with respect to the shield 20. The shield 20, the sheet member 30, and the plurality of holding portions 40 constitute a sheet attachment structure.

[0013] As an example, the sheet member 30 is a dimming sheet that changes the light transmittance of visible light according to whether a voltage is applied. The dimming sheet reduces glare caused by sunlight or its reflected light. In addition, the sheet member 30 may also be an anti-fog sheet that prevents the shield 20 from blurring by heat generated by voltage application. The sheet member 30 may also be a liquid crystal display device that displays text, symbols, images, etc. according to an electrical signal.

[0014] [Sheet mounting structure] like Figure 2 As shown, the shield 20 has an outer surface 20S1 facing the outside and an inner surface 20S2 facing the inside of the cap body 10. Each mounted portion 21 has a plurality of mounting pieces 21A protruding from the inner surface 20S2 toward the inside of the cap body 10. The mounting piece 21A is a mechanism for rotatably mounting the shield 20 on the cap body 10, and engages with a rotating mechanism provided on the cap body 10.

[0015] The shield 20 has through holes 22 at the left and right ends, respectively, in front of the corresponding mounted portion 21. The through holes 22 penetrate in the thickness direction of the shield 20. For example, the through holes 22 are circular holes. One holding portion 40 is mounted in each through hole 22.

[0016] A sheet member 30 is mounted on the inner surface 20S2 of the shield 20. The sheet member 30 is bent in a manner that follows 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 a U-shaped recessed portion 31 cut at the left and right ends. Each recessed portion 31 engages with a retaining portion 40 mounted on the through hole 22. Thus, the sheet member 30 is mounted on the inner surface 20S2 of the shield 20. The sheet member 30 covers a portion of the inner surface 20S2 of the shield 20 that is closer to the front than the through hole 22.

[0017] Two holding parts 40 are mounted on the shield 20. One of the two holding parts 40 is a first holding part 50. As an example, the first holding part 50 is an insulating resin member formed integrally. The other of the two holding parts 40 is a second holding part 60. The second holding part 60 has two terminals electrically connected to the positive and negative electrodes of the sheet member 30. The second holding part 60 has a metal portion constituting each terminal and a resin portion insulating each terminal.

[0018] [Sheet component] Below, refer to Figure 3 to Figure 5 The sheet member 30 will be described. Figure 3 and Figure 5 In FIG. 1 , a first surface 30S1 of the sheet member 30 that faces the inner surface 20S2 of the cover 20 faces the outside of the paper.

[0019] like Figure 3 As shown, in the sheet member 30 , one of the two recesses 31 is the first recess 31A. The first recess 31A engages with the first holding portion 50 . The other of the two recesses 31 is the second recess 31B. The second recess 31B engages with the second holding portion 60 .

[0020] The sheet member 30 includes a sealing portion 32. The sealing portion 32 extends in an annular shape along the periphery of the first surface 30S1 of the sheet member 30. In addition, the left recess 31 is located on the left side of the sealing portion 32. The sealing portion 32 is located on the right side of the recess 31. When the sheet member 30 is mounted on the shield 20, the sealing portion 32 is in close contact with the inner surface 20S2 of the shield 20. The sheet member 30 defines a closed space between the inner surface 20S2 and the inner surface 20S2, thereby reducing the temperature difference between the inner and outer surfaces of the shield 20 to achieve anti-fogging.

[0021] like Figure 4 As shown, in the case where the sheet member 30 is a dimming sheet, the sheet member 30, for example, includes two electrode sheets 30A and a dimming layer 30D. Each electrode sheet 30A includes an insulating substrate layer 30B and a conductive electrode layer 30C. The substrate 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 dimming layer 30D is located between the two electrode layers 30C. The dimming layer 30D includes a liquid crystal component and a polymer component that retains the liquid crystal component. The liquid crystal component retained in the polymer component changes its light transmittance by changing its orientation between a state where a voltage is applied between the two electrode layers 30C and a state where a voltage is not applied.

[0022] The sheet member 30 includes a first electrode 33, a second electrode 34, and an electrode support portion 35 arranged in the thickness direction at one end in the left-right 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 provided in the sheet member 30. The second electrode 34 is the other of the positive and negative electrodes provided in the sheet member 30. The first electrode 33 and the second electrode 34 are electrically connected to the terminals provided in the second holding portion 60, respectively.

[0023] The first electrode 33 is composed of, for example, one of the 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 the 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 contain, for example, gold, silver, copper or tin. In addition, the first electrode 33 may be separated from the electrode layer 30C and be a conductor electrically connected to the electrode layer 30C. Similarly, the second electrode 34 may be separated from the electrode layer 30C and be a conductor electrically connected to the electrode layer 30C. In addition, the first plating layer 33A and the second plating layer 34A may be omitted.

[0024] The first electrode 33 is provided on the inner surface 20S2 side of the shield 20 with respect to the electrode support portion 35. The second electrode 34 is provided on the side opposite to the shield 20 with respect 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 in a manner that maintains the distance between the first electrode 33 and the second electrode 34. As an example, the electrode support portion 35 is an insulating resin having a higher mechanical strength than the light-adjusting layer 30D.

[0025] The first electrode 33 includes a first electrode surface 33S, and the first electrode surface 33S faces the same direction as the first surface 30S1 facing the inner surface 20S2 of the shield 20. The second electrode 34 includes a second electrode surface 34S, and the second electrode surface 34S faces the same direction as the second surface 30S2 of the sheet member 30 opposite to the first surface 30S1. The first electrode surface 33S and the second electrode surface 34S face opposite directions to each other. 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.

[0026] In addition, the sheet member 30 may be subjected to anti-fogging processing on at least one of the first surface 30S1 and the second surface 30S2. Figure 4 , the diagram shows a structure 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 a sheet shape, or may be formed by painting or spraying the first surface 30S1, for example.

[0027] like Figure 5 As shown in FIG. 1 , the first electrode surface 33S is provided along the end surface of the second recess 31B so as to have a predetermined width. As an example, the first electrode surface 33S is configured in a horseshoe shape. Figure 5 , the position adding points where the first electrode surface 33S and the second electrode surface 34S are provided in the sheet member 30. The second electrode surface 34S has the same shape as the first electrode surface 33S.

[0028] [First holding section] like Figure 6 As shown, the first holding portion 50 has a substantially cylindrical shape extending along the central axis L1. The first holding portion 50 includes a head portion 51, a first shaft portion 52, a second shaft portion 53, and an engaged head portion 54. In the first holding 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.

[0029] The head 51 is located at one end in the direction along the central axis L1. The head 51 is a portion located outside the outer surface 20S1 of the shield 20 when the first holding portion 50 is mounted on the shield 20. The head 51 has a substantially disc shape centered on the central axis L1 and having a diameter larger than the through hole 22 provided in the shield 20. The head 51 has a marking portion 51A in which a portion of the disc shape protrudes in the peripheral direction of the central axis L1.

[0030] The first shaft portion 52 is a portion that is fitted into the through hole 22 of the shield 20 when the first holding 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 generally cylindrical shape with the center axis L1 as the center and a diameter that is the same as or smaller than the through hole 22 as a whole. The first shaft portion 52 has 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 center axis L1 toward the marking portion 51A.

[0031] 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 portion 51 side is a reduced diameter portion having a smaller diameter than the portion on the second shaft portion 53 side. Thus, when the first retaining portion 50 is inserted into the through hole 22, the main shaft portion 52B can be inserted into the through hole 22 while being bent in the direction along the central axis L1. The main shaft portion 52B has a first locking claw 52C protruding in the peripheral direction of the central axis L1. In the direction along the central axis L1, the distance between the head portion 51 and the first locking claw 52C is greater than the thickness of the shield 20.

[0032] The elastic piece 52D has a free end and can be elastically deformed in a manner to narrow or expand the slit 52A. The elastic piece 52D has a second locking claw 52E protruding from the outer peripheral edge of the free end toward the outer peripheral direction 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 the thickness of the shield 20.

[0033] The second shaft portion 53 is a portion protruding toward the inner side of the cap body 10 relative to the inner surface 20S2 of the shield 20 when the first holding portion 50 is mounted on the shield 20. The second shaft portion 53 has a cylindrical shape with a diameter smaller than that of the first shaft portion 52. The center of the second shaft portion 53 is parallel to the central axis L1, and is an eccentric axis L2 located at a position biased from the central axis L1 to the side opposite to the marking portion 51A. That is, the second shaft portion 53 is eccentrically configured relative to the first shaft portion 52. The second shaft portion 53 engages with the first recess 31A when the sheet member 30 is mounted on the first holding portion 50.

[0034] The engaged head portion 54 has a prism shape that is thicker than the second shaft portion 53 and can be inserted through the through hole 22. As an example, the engaged head portion 54 has a thickness substantially the same as that of 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 peripheral surface. The engaged head portion 54 has, for example, a hexagonal prism shape centered on the central axis L1.

[0035] like Figure 7 As shown in FIG. 1 , the first holding portion 50 is inserted into the through hole 22 from the side of the engaged head portion 54. The first holding portion 50 sandwiches the shield 20 through the head portion 51, the first locking claw 52C, and the second locking claw 52E, while the first shaft portion 52 is inserted into the through hole 22. Thus, the first holding portion 50 is attached to the shield 20. In addition, by elastically deforming the elastic piece 52D, the first holding portion 50 can be easily attached to the shield 20.

[0036] The second shaft portion 53 and the engaged head portion 54 are an example of a protrusion that protrudes toward the inner side of the cap body 10 closer to the inner surface 20S2 when the first holding portion 50 is mounted on the shield 20. The first recess 31A of the sheet member 30 is embedded in the annular groove 55 of the first holding portion 50 in a manner that is engaged with the second shaft portion 53. At this time, the first holding portion 50 is configured in a manner that the marking portion 51A faces forward and the eccentric axis L2 of the second shaft portion 53 is located at the rear relative to the central axis L1. In addition, the sheet member 30 is configured in a manner that the sealing portion 32 is opposite to the inner surface 20S2 of the shield 20.

[0037] like Figure 8As shown, the first holding portion 50 mounted on the shield 20 can be rotated relative to the through hole 22 with the center axis L1 as the rotation axis by engaging the tool 100 or the like with the engaged head portion 54. The tool 100 is, for example, a wrench or a spanner. In addition, the first holding portion 50 can be rotated by pinching the engaged head portion 54 with the fingers. When the first holding portion 50 rotates relative to the through hole 22, the second shaft portion 53 rotates with the center axis L1 as the rotation axis. Therefore, by rotating the first holding portion 50, the shield 20 mounted on the first holding portion 50 can be moved within the range of rotation of the second shaft portion 53. In addition, in Figure 8 In the figure, the first holding portion 50 is shown Figure 7 The state shown is a state rotated 180 degrees.

[0038] exist Fig. 9 In the figure, the double-dotted line indicates Figure 7 The sheet member 30 and the first holding portion 50 in the state shown are shown with solid lines. Figure 8 The sheet member 30 and the first holding portion 50 are in the state shown. Fig. 9 As shown, by rotating the first holding portion 50 so that the second shaft portion 53 changes from a state (two-dot chain line) located on the rear side relative to the central axis L1 to a state (solid line) located on the front side, the sheet member 30 can be moved forward. Therefore, the sheet member 30 can be fully pressed toward the inner surface 20S2 of the shield 20. As a result, the close contact between the inner surface 20S2 of the shield 20 and the sealing portion 32 of the sheet member 30 can be improved. In addition, the degree of pressing of the sheet member 30 relative to the shield 20 can be changed according to the degree of bending of the shield 20. At this time, even from the outer surface 20S1 side of the shield 20, the position of the second shaft portion 53 can be confirmed according to the direction of the marking portion 51A.

[0039] [Second holding section] like Fig.10 As shown, the second holding portion 60 includes 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 as an example, they are made of thermoplastic resin. The first terminal member 62 and the second terminal member 64 are conductive members, and as an example, they are made of metals such as copper, nickel and aluminum or alloys thereof. The second holding portion 60 has a generally cylindrical shape extending along the central axis L3 as a whole. The second holding portion 60 is fixed to each other in a manner that the shaft member 61, the first terminal member 62, the insulating member 63 and the second terminal member 64 do not move relative to each other, so that the components are integrated. The components of the second holding portion 60 can be bonded by an adhesive, can be integrated by insert molding, or can be integrated by engaging the concave and convex shapes provided on each component.

[0040] The shaft member 61 includes a head 61A, a first shaft portion 61B, and a flange portion 61C. In the shaft member 61, the head 61A, the first shaft portion 61B, and the flange portion 61C are arranged in this order along the central axis L3. The head 61A is a portion located outside the outer surface 20S1 of the shield 20 when the second holding portion 60 is mounted on the shield 20. The head 61A has a substantially disc-shaped shape with the central axis L3 as the center and a diameter larger than the through hole 22 provided in the shield 20. The head 61A has a marking portion 61A1 in which a portion of the disc-shaped portion protrudes in the peripheral direction of the central axis L3.

[0041] The first shaft portion 61B is a portion that fits into the through hole 22 when the second holding 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 diameter equal to or smaller than that of the through hole 22, centered on the central axis L3.

[0042] The flange portion 61C has a substantially disc shape having a larger diameter than the through hole 22. The flange portion 61C is located on the inner side of the cap body 10 than the inner surface 20S2 of the shield 20 when the second holding portion 60 is mounted on the shield 20. Therefore, the shaft member 61 forms an annular groove 61D by the head portion 61A, the first shaft portion 61B and the flange portion 61C. The second holding portion 60 is mounted on the shield 20 by engaging the annular groove 61D with the through hole 22.

[0043] The shaft member 61 includes a first insertion hole 61E, through which the head 61A, the first shaft portion 61B and the flange portion 61C pass. The first insertion hole 61E extends along the central axis L3. As an example, the first insertion hole 61E is a circular hole portion centered on the central axis L3, but may be any shape.

[0044] The second holding portion 60 includes a first elastic support portion 65. The first elastic support portion 65 is located at an end portion of the shaft member 61 on the flange portion 61C side in the direction along the central axis L3. The first elastic support portion 65 is made of a material having a Young's modulus lower than that of the shaft member 61 and being easily elastically deformed. The first elastic support portion 65 abuts against the first terminal 62B provided in the first terminal member 62. The first elastic support portion 65 is made of, for example, silicone rubber or the like. In addition, the first elastic support portion 65 may also be omitted.

[0045] The first terminal member 62 includes a first conductor shaft 62A and a first terminal 62B. As an example, the first conductor shaft 62A has a cylindrical shape centered on the central axis L3. The first conductor shaft 62A is inserted into the first insertion 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 flat, substantially disc-shaped shape centered on the central axis L3. The first terminal 62B is sized to be inserted through the through hole 22, and has a larger diameter than the first conductor shaft 62A.

[0046] The first terminal 62B includes a first terminal surface 62S1 and a first supported surface 62S2. The first terminal surface 62S1 is a surface of the first terminal 62B on the opposite side to the first conductor axis 62A. The first supported surface 62S2 is a surface of the first terminal 62B on the first conductor axis 62A side, and is a surface on the opposite side to the first terminal surface 62S1. The first supported surface 62S2 contacts the first elastic support portion 65 when the first conductor axis 62A is inserted into the first insertion hole 61E. The first terminal surface 62S1 may be provided with a plating layer of the same type as the first plating layer 33A.

[0047] The first terminal member 62 includes a second insertion hole 62C through which the first conductor shaft 62A and the first terminal 62B pass. The second insertion hole 62C extends along the central axis L3. As an example, the second insertion hole 62C is a circular hole centered on the central axis L3, but may be any shape.

[0048] The insulating member 63 includes an insulating shaft 63A and a second shaft portion 63B. For example, the insulating shaft 63A has a cylindrical shape centered on the 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 diameter larger than that of the insulating shaft 63A and smaller than that of 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 parallel to the central axis L3, and is an eccentric shaft L4 that is biased from the central axis L3 to the side opposite to the marking portion 61A1. That is, the second shaft portion 63B is eccentrically configured relative to the first shaft portion 61B. The second shaft portion 63B contacts the first terminal surface 62S1. The second shaft portion 63B engages with the second recess 31B when the sheet member 30 is mounted on the second holding portion 60.

[0049] The insulating member 63 includes a third insertion hole 63C through which the insulating shaft 63A and the second shaft portion 63B pass. The third insertion hole 63C extends along the central axis L3. As an example, the third insertion hole 63C is a circular hole portion centered on the central axis L3, but may be any shape.

[0050] The second terminal member 64 includes a second conductor shaft 64A and a second terminal 64B. For example, the second conductor shaft 64A has a cylindrical shape centered on the 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 flat prism shape centered on the central axis L3. The second terminal 64B has a size that is thicker than the second conductor shaft 64A and the second shaft portion 63B and can be inserted through the through hole 22. For example, the thickness of the second terminal 64B is equal to the thickness of the first terminal 62B. The second terminal 64B has a non-circular outer peripheral surface. For example, the second terminal 64B is a hexagonal prism.

[0051] The second terminal 64B includes a second terminal surface 64S1 and a second supported surface 64S2. The second terminal surface 64S1 is a surface of the second terminal 64B on the second conductor shaft 64A side. The second supported surface 64S2 is a surface of the first terminal 62B on the side 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 a plating layer of the same type as the second plating layer 34A.

[0052] The second retaining portion 60 includes a lining portion 66. The lining portion 66 is provided on the second supported surface 64S2 side relative to the second terminal 64B. The lining portion 66 is made of, for example, an insulating resin or the like. As an example, the lining portion 66 is made of the same type of resin material as the shaft member 61. As an example, the lining portion 66 is configured to be thicker than the second terminal 64B. The lining portion 66 prevents excessive deformation of the second terminal 64B by supporting the second terminal 64B. In addition, the lining portion 66 may also be omitted.

[0053] 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 lining portion 66. The second elastic support portion 67 is made of a material having a lower Young's modulus than the lining portion 66 and being easily elastically deformed. 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 or the like. In addition, the lining portion 66 and the second elastic support portion 67 are, for example, formed into a hexagonal column shape similar to the second terminal 64B. In addition, the second elastic support portion 67 may also be omitted.

[0054] like Fig.11As shown in FIG. 2 , the second holding portion 60 is mounted on the shield 20 by fitting the annular groove 61D formed by the head portion 61A, the first shaft portion 61B and the flange portion 61C into the through hole 22. In addition, the second holding portion 60 is configured to be detachable relative to the shield 20. For example, in order to facilitate detachment relative to the shield 20, the second holding portion 60 may be provided with a reduced diameter portion on the shaft member 61 in the same manner as the first holding portion 50.

[0055] The first conductor shaft 62A, the insulating shaft 63A, and the second conductor shaft 64A extend from the inner surface 20S2 side toward 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.

[0056] 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 cap body 10, but may also be a primary battery. The external power supply 200, for example, has a switch for switching between a state of outputting power and a state of not outputting power. The external power supply 200 is, for example, located near the mounted portion 21 on the outer surface 20S1 of the shield 20 that does not obstruct the field of vision, so that the wearer can operate the switch in the state of mounting the helmet. By configuring the external power supply 200 on the outer surface 20S1 of the shield 20, it is prevented that an unreasonable external force (tension) is applied to the first external wiring 201 and the second external wiring 202 when the shield 20 is rotated.

[0057] 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 outside the cap body 10 and the shield 20. In addition, the first external wiring 201 and the second external wiring 202 are not directly connected to the external power source 200, and may be connected to, for example, a controller or the like installed on the outside of the cap body 10 or the outer surface 20S1 of the shield 20. In this case, for example, the controller is connected to the external power source 200.

[0058] The first terminal 62B, the second shaft portion 63B, and the second terminal 64B are an example of a protrusion that protrudes from the inner surface 20S2 of the shield 20 toward the inner side of the cap body 10 in the second holding portion 60. The second shaft portion 63B is sandwiched by the first terminal surface 62S1 and the second terminal surface 64S1 in the 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.

[0059] The first terminal surface 62S1 and the second terminal surface 64S1 are located at positions facing each other. The distance D between the first terminal surface 62S1 and the second terminal surface 64S1 is equivalent 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 for defining the distance D. The distance D is equal to or less than the thickness T of the portion constituting the second recessed portion 31B of the sheet member 30. The distance D is equivalent to the width of the annular groove 68.

[0060] The second recess 31B is embedded in the annular groove 68. The second recess 31B is engaged with the second shaft 63B. The first terminal surface 62S1 abuts against the first electrode surface 33S. Thus, the first terminal member 62 and the first electrode 33 are electrically connected. The second terminal surface 64S1 abuts against the second electrode surface 34S. Thus, the second terminal member 64 and the second electrode 34 are electrically connected.

[0061] When the first terminal 62B contacts the first electrode 33, the first elastic support portion 65 is bent, so that the first terminal 62B is easily elastically deformed. As a result, the second recess 31B is easily embedded in the annular groove 68. Further, by increasing the pressure of the first terminal surface 62S1 contacting the first electrode surface 33S, the electrical contact reliability of the first terminal 62B and the first electrode 33 can be improved. Similarly, when the second terminal 64B contacts the second electrode 34, the second elastic support portion 67 is bent, so that the second recess 31B is easily embedded in the annular groove 68, and the electrical contact reliability of the second terminal 64B and the second electrode 34 can be improved. 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 with the first electrode surface 33S while being elastically deformed. In addition, the portion of the second terminal 64B supported by the second elastic support portion 67 is an example of an elastic portion that contacts with the second electrode surface 34S while being elastically deformed.

[0062] In addition, the second holding portion 60 can rotate the entire second holding portion 60 relative to the through hole 22 with the central axis L1 as the rotation axis by engaging the tool 100 or the like with the lining portion 66, similarly to the first holding portion 50. That is, by rotating the lining portion 66, the shaft member 61, the first terminal member 62, the insulating member 63, and the second terminal member 64 are rotated integrally. Thus, the shield 20 mounted on the second holding portion 60 can be moved within the range of rotation of the second shaft portion 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 sealing portion 32 can be improved. In addition, the pressing degree of the sheet member 30 relative to the shield 20 can be changed according to the bending degree of the shield 20. In addition, by forming the first external wiring 201 and the second external wiring 202 with electric wires, the rotation of the second holding portion 60 can be prevented from being hindered.

[0063] exist Fig.12and Fig.13 In the description, the relationship between the position 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 is described. In addition, the contact method between the second electrode 34 and the second terminal 64B is the same as the contact method between the first electrode 33 and the first terminal 62B. Fig.12 and Fig.13 In the figure, the first terminal 62B is indicated by light dots, the first electrode 33 is indicated by medium-density dots, and the overlapping portion of the first terminal 62B and the first electrode 33 is indicated by dark dots.

[0064] like Fig.12 As shown in FIG. 1 , when the second shaft portion 63B is located in the front, the overlapped portion between the first terminal 62B and the first electrode 33 becomes relatively small. Fig.13 As shown in the figure, when the second shaft portion 63B is located at the rear, the overlapped portion of the first terminal 62B and the first electrode 33 becomes relatively larger. That is, when the second holding portion 60 rotates, the overlapped area of ​​the first terminal 62B and the first electrode 33 changes. Therefore, regardless of the state in which the second holding portion 60 rotates, the size of the first electrode 33 and the first terminal 62B can be determined in a manner that ensures the minimum area required for the electrical connection between the first terminal 62B and the first electrode 33.

[0065] In the method for installing the sheet member 30 to the shield 20, first, before the shield 20 is installed on the cap body 10, two holding parts 40 are installed on the shield 20. At this time, each holding part 40 is installed in a manner that the marking parts 51A and 61A1 face the center of the left-right direction of the shield 20. And, the sheet member 30 is installed on one holding part 40. In this state, the sheet member 30 is installed on the other holding part 40 in a state of expanding the curved shape of the shield 20. Then, by rotating each holding part 40 according to the degree of adhesion of the sheet member 30 to the shield 20, the shield 20 and the sheet member 30 are reliably adhered. Through the above steps, the sheet member 30 is installed on the shield 20.

[0066] In addition, a sheet without electrodes (e.g., an anti-fog sheet with an anti-fog treatment on the surface) can be installed on the shield 20 to replace the sheet member 30 with positive and negative electrodes. In this case, the second holding portion 60 can be replaced and both holding portions 40 can be used as the first holding portion 50.

[0067] [Effects of Embodiment] According to the above-described embodiment, the following effects can be obtained. (1) Since the second holding portion 60 includes the first terminal 62B and the second terminal 64B, a wiring path that penetrates the inside and outside of the shield 20 can be realized by one second holding portion 60 in each of the first electrode 33 and the second electrode 34. Therefore, the first external wiring 201 and the second external wiring 202 for supplying power to the sheet member 30 can be simplified. For example, compared with the case where the positive and negative electrodes provided in the sheet member 30 are connected to the two holding portions 40, respectively, the wiring path of the first external wiring 201 or the second external wiring 202 can be shortened.

[0068] (2) Since the second shaft portion 63B is eccentrically arranged relative 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. Thus, the shield 20 and the sheet member 30 can be brought into close contact with each other. In addition, 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.

[0069] (3) By setting the distance D between the first terminal surface 62S1 and the second terminal surface 64S1 to be less than the distance from the first electrode surface 33S to the second electrode surface 34S, the first electrode surface 33S and the first terminal surface 62S1 can be reliably contacted, and the second electrode surface 34S and the second terminal surface 64S1 can be reliably contacted. By providing the second holding portion 60 with the first elastic support portion 65, the second recessed portion 31B of the sheet member 30 and the second shaft portion 63B can be easily engaged. 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 due to the reaction force, so the electrical contact reliability between the second electrode 34 and the second terminal 64B can be improved. In addition, by providing the second holding portion 60 with the second elastic support portion 67, the same effect can be obtained even in the contact between the second electrode 34 and the second terminal 64B. In addition, by providing the second holding portion 60 with both the first elastic support portion 65 and the second elastic support portion 67, the above-mentioned effect can be further improved.

[0070] (4) Since the second shaft portion 63B is sandwiched between the first terminal surface 62S1 and the second terminal surface 64S1, the second shaft portion 63B functions as a spacer that suppresses deformation such as a decrease in the distance D between the first terminal surface 62S1 and the second terminal surface 64S1. Therefore, the distance D can be appropriately maintained.

[0071] (5) Excessive deformation of the second terminal 64B is prevented by providing the lining portion 66 in the second holding portion 60. Furthermore, by covering the portion of the second terminal 64B that does not contribute to the contact with the second electrode 34 with an insulating member, a short circuit can be prevented.

[0072] [Modifications] In addition, the above-mentioned embodiment can be implemented as follows. In addition, the following modified examples can be combined within the range of no technical contradiction.

[0073] In the case where the thickness of the second terminal 64B is large, the lining portion 66 may not be provided because the second terminal 64B has sufficient strength and the second terminal 64B is not excessively deformed. In this case, the second elastic support portion 67 is also omitted. In this case, the second supported surface 64S2 may be covered with an insulating layer so that the second supported surface 64S2 is not exposed to the inside of the cap body 10.

[0074] · The structure in which the first terminal surface 62S1 and the second terminal surface 64S1 sandwich the second shaft portion 63B is illustrated. Fig.14 As shown, for example, in the first terminal member 62, the first terminal 62B may be arranged adjacent to the outer peripheral surface of the second shaft portion 63B, and a step 62D connecting the first conductor shaft 62A and the first terminal 62B may be provided. In this case, the second shaft portion 63B is sandwiched between the step 62D provided in the first terminal member 62 and the second terminal surface 64S1. Even in this case, the distance D between the first terminal surface 62S1 and the second terminal surface 64S1 can be appropriately maintained. In addition, compared with the above-mentioned structure, in the structure in which the first terminal surface 62S1 and the second terminal surface 64S1 sandwich the second shaft portion 63B, the structure of the first terminal member 62 can be simplified in accordance with the fact that the first terminal member 62 does not have the step 62D. In addition, a structure equivalent to the step 62D may also be provided in the second terminal member 64.

[0075] The second holding portion 60 may be a structure including only one of the first elastic support portion 65 and the second elastic support portion 67. Even in this case, the second recess 31B of the sheet member 30 and the second shaft portion 63B can be easily engaged, and the electrical contact reliability between the first electrode 33 and the first terminal 62B, and the second electrode 34 and the second terminal 64B can be improved.

[0076] The first terminal 62B may also have a convex portion that is partially bent in the thickness direction in a manner protruding toward the first electrode surface 33S. The convex portion is formed, for example, by embossing. In this case, the pressure of contact with the first electrode surface 33S can be locally increased in the convex portion of the first terminal 62B. Thus, the reliability of electrical contact can be improved. In addition, the convex portion is bent when the first terminal 62B contacts the first electrode 33, so that the second recess 31B is easily embedded in the annular groove 68. The convex portion of the first terminal 62B is an example of an elastic portion that contacts the first electrode surface 33S while being elastically deformed. In addition, the convex portion can be either point-shaped or line-shaped, or can be a ring-shaped portion such as surrounding the first conductor axis 62A, and can be either one or multiple. In this case, the second holding portion 60 may not have the first elastic support portion 65. Similarly, the second terminal 64B may also have a convex portion. The convex portion of the second terminal 64B is also an example of an elastic portion. In this case, the second holding portion 60 may not include the second elastic supporting portion 67 .

[0077] The first terminal 62B may also include an inclined portion that is inclined from the connection portion with the first conductor shaft 62A toward the outer circumferential direction in a manner close to the first electrode surface 33S. In this case, at the top of the inclined portion, the pressure of contact with the first electrode surface 33S can be locally increased. Thus, the reliability of electrical contact can be improved. In addition, the inclined portion is bent when the first terminal 62B contacts the first electrode 33, so that the second recess 31B is easily embedded in the annular groove 68. The inclined portion provided by the first terminal 62B is an example of an elastic portion that contacts with the first electrode surface 33S while being elastically deformed. In this case, the second holding portion 60 may not include the first elastic support portion 65. Similarly, the second terminal 64B may also include an inclined portion. The inclined portion provided by the second terminal 64B is also an example of an elastic portion. In this case, the second holding portion 60 may not include the second elastic support portion 67.

[0078] The second retaining portion 60 may not include the first elastic support portion 65 and the second elastic support portion 67. In this case, the second recess 31B is pressed into the annular groove 68. In the case of such a structure, the first terminal 62B and the second terminal 64B may also be, for example, a protrusion with a locally increased thickness. In this case, in the protrusion provided by the first terminal 62B, the pressure for contacting the first electrode 33 can be locally increased, and the force required to embed the second recess 31B into the annular groove 68 can be suppressed from being excessively increased. Similarly, in the protrusion provided by the second terminal 64B, the pressure for contacting the second electrode 34 can be locally increased. The protrusion may be either point-shaped or line-shaped. There may be one or more protrusions.

[0079] The second shaft portion 63B may not be arranged eccentrically with respect to the first shaft portion 61B, and the center of the second shaft portion 63B may be the center axis L3. In this case, regardless of the orientation of the second holding portion 60 mounted on 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 made constant. In addition, even in this case, the close contact between the shield 20 and the sheet member 30 can be improved by rotating the first holding portion 50.

[0080] It is sufficient that at least one of the two holding portions 40 is the second holding portion 60. For example, both of the two holding portions 40 may be the second holding portion 60. In this case, an electrode for forming a circuit independently of the first electrode 33 and the second electrode 34 may be provided in the first recess 31A, or no electrode may be provided. In addition, the first holding portion 50 of the two holding portions 40 may not be used, and 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. For example, a holding pin engaged with the first recess 31A may be integrally formed with the shield 20. In addition, the end of the sheet member 30 on the side of the first recess 31A may be attached to the shield 20 by an adhesive. In this case, the shield 20 may not have the through hole 22 on the side of the first holding portion 50, and the sheet member 30 may not have the first recess 31A.

[0081] 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 be a disk-shaped shape with a portion cut away. 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.

[0082] The shape of the first conductor shaft 62A is not limited as long as it is a structure that can connect the first terminal 62B to the first external wiring 201. For example, the first conductor shaft 62A may not be cylindrical, but may be prism-shaped or sheet-shaped. In addition, the first terminal member 62 may not have the 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 a structure that is electrically connected inside the first insertion hole 61E. That is, the first terminal 62B may be a structure that is electrically connected to the first external wiring 201 through the through hole 22. Similarly, the shape of the second conductor shaft 64A is not limited, and the second terminal member 64 may not have the second conductor shaft 64A.

[0083] The first electrode 33 and the second electrode 34 are not limited to Figure 4 The following refers to Figure 15 to Figure 19 Another example of the sheet member 30 will be described. Fig.15As shown, the sheet member 30 includes 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 in 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.

[0084] like Fig.16 As shown, the first electrode member 70 is formed by laminating a first conductive layer 70A having conductivity and a first insulating layer 70B made of resin. The first conductive layer 70A may be, for example, a metal foil bonded to the first insulating layer 70B, a metal plated on the first insulating layer 70B, or a metal deposited on the first insulating layer 70B by sputtering or the like.

[0085] The first electrode member 70 includes a first electrode portion 71, a first bent portion 72, and a first connecting portion 73. The first electrode portion 71 is a portion exposed on the first surface 30S1 side of the sheet member 30. As an example, the first electrode portion 71 is configured 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 approximately vertically in a manner that the first conductor layer 70A is a mountain portion and the first insulating layer 70B is a valley portion.

[0086] like Fig.17 As shown, the second electrode member 80 is formed by laminating the second conductor layer 80A and the second insulating layer 80B. The layer structure of the second electrode member 80 is the same as the layer structure of the first electrode member 70. The second electrode member 80 includes a second electrode portion 81, a second bent portion 82 and a second connecting portion 83. The second electrode portion 81 is a portion exposed on the second surface 30S2 side of the sheet member 30. The second electrode portion 81 is the same shape as the first electrode portion 71, and is configured as a horseshoe as an example. The second bent portion 82 and the second connecting portion 83 are portions extending 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 respectively bent approximately vertically in a manner that the second conductor layer 80A is a mountain portion and the second insulating layer 80B is a valley portion.

[0087] like Fig.18As shown, the sheet member 30 includes a sealing layer 30E and an adhesive layer 30F between the two electrode layers 30C. As an example, the sealing layer 30E is an insulating resin. The sealing layer 30E is provided over the entire periphery of the end face of the light-adjusting layer 30D. The sealing layer 30E covers the end face of the light-adjusting layer 30D, thereby preventing the liquid crystal component of the light-adjusting layer 30D from being exposed to the outside and preventing the liquid crystal component from being degraded due to moisture, etc. The adhesive layer 30F is an insulating adhesive. The adhesive layer 30F improves the bonding strength of the two electrode sheets 30A.

[0088] The first electrode member 70 is bonded to the end of the electrode sheet 30A on the first surface 30S1 side by an adhesive or the like in such a manner that the first insulating layer 70B contacts the electrode sheet 30A. 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 surface of the sheet member 30 and constitutes the second recess 31B. The first connecting portion 73 is arranged 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 by, for example, a conductive adhesive or the like.

[0089] like Fig.19 As shown, the second electrode member 80 is bonded to the end of the electrode sheet 30A on the second surface 30S2 side by an adhesive or the like in such a manner that the second insulating layer 80B contacts the electrode sheet 30A. 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 surface of the sheet member 30 and constitutes the second recess 31B. The second connecting portion 83 is arranged between the two electrode layers 30C. The second conductor layer 80A of the second connecting 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. As described above, even in the case of using the first electrode member 70 and the second electrode member 80 that are separate from the electrode layer 30C of the sheet member 30, the first electrode 33 and the second electrode 34 of the sheet member 30 can be constituted.

[0090] The helmet 1 only needs to include the shield 20. For example, it may be a flip-up type helmet whose jaw can be raised, an open-faced helmet, a helmet with a detachable jaw, or a movable helmet whose jaw can be rotated and fixed to the back of the head.

Claims

1. A sheet mounting structure comprising: a shield configured to be mounted on a cap body; a sheet member covering an inner surface of the shield; and a holding portion for mounting the sheet member on the shield, The shield has a through hole for mounting the holding portion. The sheet member includes a recessed portion engaged with the holding portion, and a first electrode and a second electrode arranged around the recessed portion in the thickness direction of the sheet member, wherein a first electrode surface of the first electrode and a second electrode surface of the second electrode face in opposite directions to each other. The holding portion includes: a first shaft portion engaged with 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 engaged with the recessed portion. The first terminal is configured to be electrically connected to a first external wiring located outside the shield via the through hole. The second terminal is configured to be electrically connected to a second external wiring located outside the shield via the through hole.

2. The sheet mounting structure according to claim 1, wherein: The first shaft portion is rotatably embedded in the through hole. The second shaft portion is arranged eccentrically with respect to the first shaft portion, The holding portion is configured so that the first shaft portion, the first terminal, the second terminal, and the second shaft portion rotate integrally.

3. The sheet mounting structure according to claim 1 or 2, wherein: The first terminal includes a first terminal surface in contact with the first electrode surface. The second terminal includes a second terminal surface facing the first terminal surface and in contact with the second electrode surface. The distance between the first terminal surface and the second terminal surface is less than the distance from the first electrode surface to the second electrode surface. The first terminal includes an elastic portion that comes into surface contact with the first electrode while being elastically deformed.

4. The sheet mounting structure according to claim 3, wherein: 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.

5. The sheet mounting structure according to claim 1 or 2, wherein: The holding portion includes an insulating lining portion, and the lining portion is in contact with a surface of the second terminal on the opposite side to the second shaft portion.

6. A helmet comprising: a cap body; a shield mounted on the cap body; a sheet member covering the inner surface of the shield; and a holding portion for mounting the sheet member on the shield; and first external wiring and second external wiring for supplying power to the sheet member, The shield has a through hole for mounting the holding portion. The sheet member includes a recessed portion engaged with the holding portion, and a first electrode and a second electrode arranged around the recessed portion in the thickness direction of the sheet member, wherein a first electrode surface of the first electrode and a second electrode surface of the second electrode face in opposite directions to each other. The holding portion includes: a first shaft portion engaged with the through hole; a first terminal in surface contact with the first electrode; and a second terminal facing the first terminal and in surface contact with the second electrode. and a second shaft portion, located between the first terminal and the second terminal, engaged with the recessed portion, 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.

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