Screen device and helmet

Abstract

A screen device configured to be attached to a helmet, the screen device including: a support portion including a rail portion configured to support a combiner; and the combiner including a projection surface configured to project an image projected from a projection portion attached to the helmet and a supported portion supported by the rail portion, the rail portion configured to support the supported portion so as to be movable between a display position and a retreat position, the projection surface being disposed in front of a wearer of the helmet in the display position and the projection surface being retreated from the front of the wearer in the retreat position, the support portion further including a positioning portion configured to position the supported portion supported by the rail portion, the positioning portion being configured to position the supported portion by an external operation with respect to the positioning portion in at least one of the display position and the retreat position.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to a screen device of a projected image and a helmet provided with the screen device. BACKGROUND

[0002] A head-mounted display (HMD) provided in a helmet for a two-wheeled vehicle is known. A screen device, which is an example of the HMD, is provided with a combiner of a half-mirror structure. The combiner reflects an image projected by a projection section provided inside the helmet with a projection surface to display as a virtual image. For example, Patent Literature 1 describes a screen device that can move between a display position, which is a first posture in which the projection surface enters the field of view of the wearer, and a retreat position, which is a second posture in which the projection surface does not enter the field of view of the wearer.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2020-100906 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] It is desirable that each position supported by the combiner inside the helmet can be adjusted according to the driving posture and the like. For example, from the viewpoint of maintaining the high attention of the wearer while driving, it is preferable that the information displayed on the projection surface deviates from the line of sight of the wearer a little. In addition, from the viewpoint of reducing eye fatigue and maintaining safety while driving, it is preferable that the information displayed on the projection surface can be confirmed by moving the line of sight only a little. However, since the position of the viewpoint of the wearer with respect to the combiner changes depending on the driving posture and the like inherent to the wearer, it is a fact that the information cannot be provided to the wearer in an optimal manner. Furthermore, a technology capable of adjusting each position supported by the combiner is also strongly required from the viewpoint of retreating the combiner to an appropriate position.

[0008] MEANS FOR SOLVING THE PROBLEMS

[0009] A screen device according to one embodiment of the present invention is configured to be mounted on a helmet, the screen device comprising: a supporting portion comprising a rail portion for supporting a combiner; and the combiner comprising a projection surface and a supported portion supported by the rail portion, the projection surface projecting an image projected from the projection portion mounted on the helmet, the rail portion supporting the supported portion so as to be movable between a display position and a retracted position, wherein in the display position, the projection surface is arranged in front of a wearer of the helmet, and in the retracted position, the projection surface is retracted from the front of the wearer, the supporting portion further comprising a positioning portion for positioning the supported portion supported by the rail portion, the positioning portion being configured to position the supported portion by external operation of the positioning portion in at least one of the display position and the retracted position.

[0010] A helmet according to one embodiment of the present invention comprises a screen device and a projection unit for projecting an image onto the screen device, the screen device comprising: a support unit comprising a rail unit for supporting a combiner; and the combiner comprising a projection surface and a supported portion supported by the rail unit, the projection surface projecting the image projected from the projection unit, the rail unit supporting the supported portion so as to be movable between a display position and a retracted position, wherein in the display position, the projection surface is arranged in front of a wearer of the helmet, and in the retracted position, the projection surface is retracted from the front of the wearer, the support unit further comprising a positioning unit for positioning the supported portion supported by the rail unit, the positioning unit being configured to position the supported portion in at least one of the display position and the retracted position by external operation of the positioning unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a side view of a helmet according to one embodiment.

[0012] Figure 2 yes Figure 1 An exploded perspective view of the screen device and assembly part of the helmet.

[0013] Figure 3 yes Figure 2 An exploded perspective view of the up and down movement mechanism of the screen device.

[0014] Figure 4 yes Figure 2 A perspective view of a screen device.

[0015] Figure 5 It shows Figure 1 A three-dimensional diagram of the structure of the screen device and projection part of the helmet.

[0016] Figure 6 It shows Figure 1FIG. 1 is a diagram showing a state in which the combiner of the helmet is configured in a retracted position.

[0017] Figure 7 FIG. 2 is a diagram showing a state in which the combiner of the helmet is configured in a display position. Figure 1

[0018] Figure 8 FIG. 3 is a diagram showing a state in which the combiner of the helmet is configured in a display position. Figure 1

[0019] Figure 9 FIG. 4 is a diagram showing a state in which the combiner of the helmet is configured in a display position. Figure 1 DETAILED DESCRIPTION

[0020] Hereinafter, an embodiment of a helmet and a screen device will be described with reference to the drawings. Figures 1-9 Figures 1-9

[0021] [Helmet]

[0022] As shown in FIG. 1, the helmet 1 is a full helmet. The helmet 1 has a cap body 2 and a screen device 10. The cap body 2 constitutes an outer shell of the helmet. The cap body 2 is a resin member having a semispherical shape. The material constituting the cap body 2 is selected from, for example, acrylonitrile-butadiene-styrene copolymer (ABS), polycarbonate (PC), and a thermosetting resin in which a reinforcing fiber is impregnated. Figure 1 The cap body 2 has an opening portion 2a that opens toward the front and a chinguard 2b that is positioned below the opening portion 2a. The opening portion 2a ensures the field of view of the wearer. A shield 3 is provided at the opening portion 2a. The shield 3 is a plate member having light transmittance.

[0023] The shield 3 is configured to be movable between an open position and a closed position. The open position is a position in which the shield 3 leaves the opening portion 2a open. The closed position is a position in which the shield 3 closes the opening portion 2a, as shown by the double-dotted line in FIG. 2. The shield 3 prevents foreign matter, rain, and wind flying from the front from entering the helmet 1 in the closed position, and thus improves the visual confirmation of the wearer.

[0024] Figure 1 A pair of support mechanisms 4 is provided at the cap body 2. The pair of support mechanisms 4 is configured at both end portions of the opening portion 2a. The support mechanisms 4 support the shield 3 so as to be movable between the open position and the closed position.

[0025] A pair of support mechanisms 4 is provided at the cap body 2. The pair of support mechanisms 4 is configured at both end portions of the opening portion 2a. The support mechanisms 4 support the shield 3 so as to be movable between the open position and the closed position.

[0026] ​​​​​​The cap body 2 houses an inner liner (not shown) which is an inner member for absorbing impact. The inner liner has a shape along the inner surface of the cap body 2. The inner liner is composed of, for example, a foamed resin such as foamed styrene.

[0027] [Screen device]

[0028] The screen device 10 is fitted to a region of the cap body 2 above the opening portion 2a by the fitting portion 5, and hangs down to a space defined by the opening portion 2a. The fitting portion 5 constitutes a part of the outer surface in the cap body 2, and is configured so as not to produce a large step with the surrounding surface in the outer surface of the cap body 2.

[0029] As shown in Figure 2 , the fitting portion 5 is constituted by an outer member 6 and an inner member 7. The outer member 6 is a member located on the outer side of the helmet 1 than the inner member 7, and constitutes a part of the outer surface in the cap body 2. The outer member 6 is provided with a plurality of engaging portions 6a which are hook-like protrusions.

[0030] The inner member 7 is a member located on the inner side of the helmet 1 than the outer member 6. The inner member 7 is provided with a plurality of engaging holes 7d which engage with the engaging portions 6a. The fitting portion 5 is engaged by the engaging portions 6a and the engaging holes 7d, whereby the outer member 6 and the inner member 7 are joined in a manner so as to become one body.

[0031] The inner member 7 is provided with a first protrusion 7a, a second protrusion 7b, and a third protrusion 7c which extend toward the inner side of the helmet 1. The fitting portion 5 penetrates the first protrusion 7a, the second protrusion 7b, and the third protrusion 7c in the cap body 2, and is joined with the screen device 10 disposed on the inner side of the cap body 2. Thus, the screen device 10 is fixed to the cap body 2 by the fitting portion 5.

[0032] The screen device 10 is provided with an up-and-down moving mechanism 11 and a combiner 50. The up-and-down moving mechanism 11 is a mechanism for supporting the combiner 50 so as to be movable up and down. The combiner 50 is, for example, a transmission screen having a semi-transmission semi-reflection mirror structure.

[0033] The up-and-down moving mechanism 11 is provided with a first member 20, a second member 30, and a support portion 40. The first member 20 and the second member 30 are disposed between the cap body 2 and the inner liner. The first member 20 is a member which opposes the inner surface of the cap body 2. The second member 30 is a member which opposes the inner liner.

[0034] The first member 20 is provided with penetration holes 21a, 21b. The second member 30 is provided with insertion holes 31a, 31b, 31c. The first protrusion 7a is inserted into the insertion hole 31a, and is fixed by a screw or the like. The second protrusion 7b is inserted into the insertion hole 31b via the penetration hole 21a, and is fixed by a screw or the like. The third protrusion 7c is inserted into the insertion hole 31c via the penetration hole 21b, and is fixed by a screw or the like.

[0035] The support portion 40 is disposed between the first member 20 and the second member 30 and is held so as to be movable vertically. The lower end of the support portion 40 extends downward from the first member 20 and the second member 30. A rail portion 42 is provided at the lower end of the support portion 40. A supported portion 53 of the combiner 50 is inserted through the rail portion 42. The combiner 50 is supported by the support portion 40 by attaching a stopper 54 to the top end of the supported portion 53.

[0036] [Up and down movement mechanism]

[0037] like Figure 3 As shown, the first member 20 includes the through holes 21a and 21b and a plurality of first connecting portions 22. The second member 30 includes a plurality of second connecting portions 32. The first member 20 and the second member 30 are connected by fastening the first connecting portions 22 and the second connecting portions 32 with screws.

[0038] The first member 20 includes a guide portion 23 and two receiving portions 24 located on either side of the guide portion 23. The guide portion 23 is a groove extending in the vertical direction and provided on the surface facing the second member 30. A support portion 40 is disposed on the guide portion 23. The receiving portion 24 is an annular wall provided on the surface facing the second member 30. Each receiving portion 24 has a notch extending through the guide portion 23. Each receiving portion 24 accommodates a locking member 25.

[0039] The locking member 25 is an annular member having a shape corresponding to the housing portion 24. The locking member 25 has two protrusions 25a on its circumference. The locking member 25 is arranged so that the protrusions 25a protrude toward the guide portion 23 through the notch in the housing portion 24. The protrusions 25a engage with the concave-convex portions 41b provided on the side of the plate-shaped portion 41 of the support portion 40, thereby retaining the support portion 40 disposed on the guide portion 23 in any vertical position.

[0040] The second member 30 has a shape corresponding to that of the first member 20 and extends above the first member 20. The second member 30 includes the above-mentioned insertion holes 31a, 31b, and 31c and a plurality of second connection portions 32.

[0041] The second member 30 further includes a guide groove 33 extending in the vertical direction. The guide groove 33 is engaged with the guide protrusion 41a provided on the support portion 40, thereby defining a movable range of the support portion 40 in the vertical direction.

[0042] The support portion 40 includes a plate portion 41 and a rail portion 42. The plate portion 41 is a region of the support portion 40 disposed on the guide portion 23. The plate portion 41 has a shape corresponding to the guide portion 23 and has a rectangular parallelepiped shape with the longitudinal side in the vertical direction.

[0043] The plate portion 41 includes a guide protrusion 41a and a sawtooth-shaped concave-convex portion 41b that protrude toward the second member 30. The guide protrusion 41a is provided on a surface of the plate portion 41 facing the second member 30 and engages with the guide groove 33 provided in the second member 30.

[0044] The concave-convex portion 41b is provided on the side surface of the plate-shaped portion 41. The concave-convex portion 41b is configured with concave portions and convex portions alternately arranged in the vertical direction. Each concave portion of the concave-convex portion 41b engages with the convex portion 25a of the locking member 25. The support portion 40 has a structure such that the concave-convex portion 41b engages with the convex portion 25a, thereby enabling the support portion 40 to switch its vertical position relative to the first member 20 and the second member 30 according to the intervals between the concave portions of the concave-convex portion 41b.

[0045] Since the support portion 40 supports the first member 20 and the second member 30 so as to be movable vertically, the combiner 50 supported by the support portion 40 can be positioned appropriately vertically relative to the wearer's field of view.

[0046] The rail portion 42 is provided at the bottom of the plate-shaped portion 41. The rail portion 42 has a shape that curves from the front toward the rear and downward, forming an arc with a center angle θ centered below the rail portion 42. The rail portion 42 has a rail hole 43 that penetrates in the left-right direction and extends along the arc of the rail portion 42. The supported portion 53 of the combiner 50 is inserted through the rail hole 43.

[0047] A threaded hole 44 extending through the front and rear ends of the rail portion 42 is provided. A screw 45, serving as a positioning member, is mounted in the threaded hole 44. The screw 45 includes a drive portion extending in the axial direction, and a tool or the like engages with the drive portion. The screw 45 is driven in the front and rear direction, which serves as the thrust direction, by rotating the drive portion engaged with the tool.

[0048] The screw 45 is rotated by external manipulation such as a pressing tool, causing the tip 45a of the screw 45 to protrude into the rail hole 43, thereby defining the movable range of the supported portion 53 within the rail hole 43. In other words, the tip 45a of the screw 45 functions as an abutment portion for positioning the supported portion 53 within the rail hole 43.

[0049] like Figure 4 As shown, two slits 46 are provided in the lower portion of the rail portion 42. The two slits 46 are through-holes extending along the arc of the rail portion 42. An elastic portion 47 is provided between the two slits 46 and extends from the front end to the rear end of the rail portion 42. The elastic portion 47 is thinner than the other regions of the lower portion of the rail portion 42 to facilitate deflection.

[0050] return Figure 3In the elastic portion 47, a first locking protrusion 47a protruding toward the rail hole 43 is provided in a front region in the surface constituting the inner circumferential surface of the rail hole 43. In addition, in the elastic portion 47, a second locking protrusion 47b protruding toward the rail hole 43 is provided in a rear region in the surface constituting the inner circumferential surface of the rail hole 43. The first locking protrusion 47a and the second locking protrusion 47b lock the combiner 50 in each position by pressing the supported portion 53 upward and pressing it to a locking surface 48 which is an upper surface in the inner circumferential surface of the rail hole 43.

[0051] [Combiner]

[0052] As shown in FIG. 1, the combiner 50 is provided with a projection surface 51 and an extension portion 52. In addition, the combiner 50 is provided with a supported portion 53 (refer to FIG. 2). The projection surface 51 is a transmission type screen provided with a display region 51a in which an image V output from a projection portion 60 (refer to FIG. 3) disposed in the visor 2b is projected. Figure 4 Figure 2 Figure 5 The extension portion 52 extends from the projection surface 51 in a direction in which the supported portion 40 is located. The extension portion 52 is a region connecting the projection surface 51 and the supported portion 53. The supported portion 53 is a flat region protruding toward the rail hole 43 of the support portion 40 from the extension portion 52. The supported portion 53 is inserted in the left and right directions with respect to the rail hole 43.

[0053] The stopper 54 has a hole into which a top end of the supported portion 53 is inserted. The combiner 50 is fitted with the stopper 54 at the top end of the supported portion 53 in a state in which the supported portion 53 is inserted in the rail hole 43. Thus, the combiner 50 is held to the rail portion 42 in a state in which the supported portion 53 can slide along the rail hole 43.

[0054] Specifically, the supported portion 53 is provided with a first fixing hole 53a (refer to FIG. 2) at a top end portion. In addition, the stopper 54 is provided with a second fixing hole 54a at a position corresponding to the first fixing hole 53a in a state in which the stopper 54 is fitted to the top end of the supported portion 53. The stopper 54 is fixed to the top end of the supported portion 53 by screwing the first fixing hole 53a and the second fixing hole 54a in a state in which the stopper 54 is fitted to the top end of the supported portion 53. In addition, the extension portion 52 and the stopper 54 abut a surface perpendicular to the supported portion 53 to an opening surface of the rail hole 43. Thus, the combiner 50 is inhibited from shaking and the like with respect to the rail portion 42.

[0055] Specifically, the supported portion 53 is provided with a first fixing hole 53a (refer to FIG. 2) at a top end portion. In addition, the stopper 54 is provided with a second fixing hole 54a at a position corresponding to the first fixing hole 53a in a state in which the stopper 54 is fitted to the top end of the supported portion 53. The stopper 54 is fixed to the top end of the supported portion 53 by screwing the first fixing hole 53a and the second fixing hole 54a in a state in which the stopper 54 is fitted to the top end of the supported portion 53. In addition, the extension portion 52 and the stopper 54 abut a surface perpendicular to the supported portion 53 to an opening surface of the rail hole 43. Thus, the combiner 50 is inhibited from shaking and the like with respect to the rail portion 42. Figure 2

[0056] ​​​Further, the stopper 54 is an operation portion for moving the combiner 50 along the arc of the rail portion 42. That is, the combiner 50 is moved by the support portion 53 along the rail hole 43 by operating the stopper 54. The combiner 50 is moved along the arc of the rail portion 42 by operating the stopper 54, and thus the relative angle of the projection surface 51 with respect to the support portion 40 is changed.

[0057] The stopper 54 is Figure 1 The screen device 10 shown is arranged in a state of being fitted to the helmet 1 in a manner of facing outward from the opening portion 2a. Further, in the surface of the stopper 54 facing outward from the opening portion 2a, the rear portion is bulged more than the front portion, and has a slope that is easy for the fingers of the wearer to contact. Thus, it is easy for the wearer to operate the stopper 54 with his own fingers to move the combiner 50 along the arc of the rail portion 42.

[0058] [Projection portion]

[0059] As Figure 5 shown, the projection portion 60 is provided in the visor 2b. The projection portion 60 projects the image V toward the projection surface 51 from the projection port 61 provided in the region constituting the opening portion 2a in the visor 2b.

[0060] [Effects of the embodiment]

[0061] The effects of the present embodiment will be described with reference to Figures 6-9 In addition, in Figure 8 and Figure 9 , the stopper 54 is not shown for convenience.

[0062] As Figure 6 shown, when the image V is not needed and the combiner 50 is not used, the stopper 54 is operated to move the combiner 50 to a position where the support portion 53 is in contact with the rear end portion of the rail portion 42. Thus, the combiner 50 is arranged at a retreat position where the projection surface 51 retreats from the front of the viewpoint E of the wearer. The combiner 50 is pressed by the second locking protrusion 47b toward the locking surface 48, and thus is locked at the retreat position by the elastic force of the elastic portion 47. When the combiner 50 is arranged at the retreat position, the line of sight S that does not pass through the combiner 50 and is not bothered by the image V can be ensured at the viewpoint E of the wearer.

[0063] As Figure 7As shown, when using the combiner 50, the stopper 54 is operated to move the combiner 50 to a position where the supported portion 53 contacts the front end of the rail portion 42. This places the combiner 50 in a display position where the projection surface 51 is located in front of the wearer's viewpoint E. Specifically, by operating the stopper 54, the combiner 50 can be switched between being in the display position and being in the retracted position. The combiner 50 is locked in the display position by pressing the supported portion 53 toward the locking surface 48 via the first locking protrusion 47a, thereby being locked by the elastic force of the elastic portion 47.

[0064] At this time, the image V output from the projection unit 60 is projected onto the projection surface 51 and reaches the wearer's field of view. The wearer can arrange the image V projected onto the projection surface 51 in the line of sight S. In other words, the wearer can visually confirm the image V projected onto the projection surface 51 while looking straight ahead.

[0065] Furthermore, when the combiner 50 is arranged at the display position, the position of the combiner 50 in the vertical direction can be adjusted according to the height H of the viewpoint E by moving the support portion 40 vertically relative to the first member 20 and the second member 30 .

[0066] like Figure 8 As shown, when the tip 45a of the screw 45 serving as the positioning portion is located in the threaded hole 44, the combiner 50 is positioned by the supported portion 53 abutting against the front end portion of the rail portion 42. At this time, the combiner 50 is pressed toward the locking surface 48 by the first locking protrusion 47a, and the elastic force of the elastic portion 47 locks the supported portion 53 in abutment against the front end portion of the rail portion 42.

[0067] In addition, by rotating the screw 45 as the positioning portion so that the top end 45a protrudes into the rail hole 43, the display position can be finely adjusted. Figure 9 As shown, when fine-tuning the display position, the screw 45 is turned so that the tip 45a protrudes into the rail hole 43. In this way, the combiner 50 is positioned by the supported portion 53 abutting against the tip 45a. At this time, the combiner 50 is pressed toward the locking surface 48 by the first locking protrusion 47a, and the elastic force of the elastic portion 47 is used to lock the supported portion 53 in a state of abutting against the tip 45a of the screw 45. In addition, Figure 9 The double-dashed line shows Figure 8 The position of the projection surface 51 in .

[0068] The position at which the tip 45a of the screw 45 is abutted by the supported portion 53 protruding into the inside of the rail hole 43 becomes the display position. That is, by displacing the screw 45 in the thrust direction, the display position can be adjusted according to the driving posture inherent to the wearer and the like, so that the projection surface 51 is disposed at an optimum position in the field of vision. In other words, the display position is a set position at which the combiner 50 is positioned by the supported portion 53 abutting against the tip 45a of the screw 45.

[0069] In addition, the combiner 50 can independently perform the movement of the supported portion 40 in the up-and-down direction with respect to the first member 20 and the second member 30, and the movement of the supported portion 40 in the front-and-back direction with respect to the rail portion 42, respectively. That is, the combiner 50 adjusts the angle of the projection surface 51 with respect to the rail portion 42 by displacing the screw 45 at each position in the up-and-down direction at which the supported portion 40 is positioned, so that the display position can be adjusted so that the image V displayed on the projection surface 51 is disposed at an optimum position in the field of vision.

[0070] The combiner 50 is disposed at a position very close to the viewpoint E of the wearer between the front object such as a preceding vehicle or a road surface and the viewpoint E of the wearer. Therefore, from the viewpoint E of the wearer, a slight difference in the angle of the projection surface 51 with respect to the line of sight S greatly displaces the relative position of the image V with respect to the front object. From this viewpoint, it is preferable that the angle of the projection surface 51 on the display position be finely adjusted independently of the mechanism such as a large position change that switches the position of the combiner 50 to the display position and the retreat position. In this regard, the angle of the projection surface 51 on the display position is specified by the protruding amount of the screw 45 inside the rail hole 43. Thus, it is possible to convert the operation amount such as the number of rotations of the screw 45 in the circumferential direction into a slight displacement of the screw 45 in the thrust direction, and to finely adjust the angle of the projection surface 51 on the display position.

[0071] [Effects of Embodiments]

[0072] According to the above-described embodiments, the following enumerated effects can be obtained.

[0073] (1) By the movement of the screw 45 in the thrust direction as the positioning portion, the display position of the combiner 50 can be adjusted according to the driving posture inherent to the wearer and the like, so that the image V displayed on the projection surface 51 is disposed at an optimum position in the field of vision. Thus, the wearer can appropriately and easily confirm the image V displayed on the projection surface 51.

[0074] (2) By the tip 45a of the screw 45 being abutted by the supported portion 53, the display position at which the supported portion 53 is caught by the first catching protrusion 47a can be adjusted. Therefore, the display position can be adjusted by a simple operation of rotating the screw 45 to displace the tip 45a as the abutting portion in the thrust direction with a simple structure.

[0075] (3) The large rotational operation of the screw 45 as the positioning portion is converted into a slight movement in the thrust direction of the screw 45, and the angle of the projection surface 51 on the display position with respect to the rail portion 42 can be adjusted. Thus, the wearer can more appropriately and easily confirm the image V displayed on the projection surface 51.

[0076] (4) The combiner 50 can independently move the support portion 40 with respect to the first member 20 and the second member 30 in the up-and-down direction and with respect to the support portion 40 in the front-and-back direction along the rail hole 43, respectively. Thus, on each position in the up-and-down direction in which the support portion 40 is positioned, the angle of the projection surface 51 with respect to the rail portion 42 can be adjusted.

[0077] Further, the above-described embodiment can be implemented with the following modifications.

[0078] • The above-described embodiment illustrates a structure in which the screw 45 is provided as the positioning portion, but the structure of the positioning portion is not limited to the screw 45. For example, it can be a structure in which, instead of the screw 45, a rack having a sawtooth-shaped side surface is provided, instead of the threaded hole 44, a through hole through which the rack is inserted is provided, and a mechanism for driving the rack in the through hole is further provided. In the case of the above-described structure, on the display position, the combiner 50 is positioned by the tip end of the rack abutting against the supported portion 53. That is, the rack is a positioning portion for adjusting the display position, and the tip end of the rack is an abutting portion that abuts against the supported portion 53 of the combiner 50. Even in the above-described structure, the display position can be adjusted according to the protruding amount of the rack in the rail hole 43.

[0079] • The above-described embodiment illustrates a structure in which the combiner 50 is positioned and the display position is fixed by the supported portion 53 abutting against the tip end 45a (abutting portion) of the screw 45. However, the positioning portion is not limited to the screw 45 having the tip end 45a (abutting portion), but is a structure in which the supported portion 53 inserted into the rail hole 43 is positioned. For example, the positioning portion can have a fitting member that is fitted to the rail portion 42 in an adjustable position, and the display position is fixed by the fitting member that is fitted to the supported portion 53 of the display position being displaced along the rail portion 42. Alternatively, the supported portion 53 can be a structure including a magnet, and the positioning portion can have a magnetic member that is fitted to the rail portion 42 in an adjustable position, and the display position is fixed by the magnetic member that is magnetically engaged with the supported portion 53 of the display position being displaced along the rail portion 42.

[0080] • The above embodiment illustrates a structure in which the screw 45 serving as the positioning portion is provided at the front end portion of the rail portion 42, but is not limited thereto, and for example, the screw 45 can also be provided at the rear end portion of the rail portion 42. In this case, the combiner 50 in the retreat position is positioned by the screw 45 provided at the rear end portion of the rail portion 42. That is, both the display position and the retreat position are set positions in which the combiner 50 is positioned in accordance with the position of the tip end 45a of the screw 45 serving as the positioning portion. By the retreat position being a set position, it becomes easy to retreat the combiner 50 to an optimum position in accordance with the driving posture of the wearer or the like, and in addition, the amount of movement when switching between the display position and the retreat position can be reduced. Furthermore, it can also be a structure in which the screw 45 serving as the positioning portion is provided only at the rear end portion of the rail portion 42, and the screw 45 is not provided at the front end portion of the rail portion 42.

[0081] • One or a plurality of engagement recesses can also be provided at the supported portion 53, which engage with the first engagement protrusion 47a in the display position and engage with the second engagement protrusion 47b in the retreat position. For example, in the case where a plurality of engagement recesses are provided at the supported portion 53, the first engagement protrusion 47a and the engagement recesses engage in each position in which the display position is adjusted by the positioning portion, and thereby the combiner 50 is appropriately supported. In addition, a plurality of first engagement protrusions 47a and second engagement protrusions 47b can also be provided.

[0082] • The above embodiment illustrates a structure in which the screen device 10 is attached to the cap body 2, but as long as a structure in which the screen device 10 can be appropriately disposed in the helmet 1, for example, the screen device 10 can also be attached to a member other than the cap body 2, such as the inner liner.

[0083] • The above embodiment illustrates a structure in which the projection portion 60 is provided at the goggle 2b, but the disposition of the projection portion 60 is not limited, as long as an image V can be projected from which position in the helmet 1 to the projection surface 51.

[0084] • The above embodiment illustrates a structure in which the helmet 1 is a full helmet, but is not limited thereto, and for example, can also be a flip-up helmet in which the chin portion can be raised, an open helmet, a helmet having a detachable chin portion, or a convertible helmet in which the chin portion is rotated to be fixed to the back of the head.

Claims

1. A screen device configured to be mounted on a helmet, the screen device comprising: a support portion having a rail portion for supporting the combiner; and The combiner includes a projection surface and a supported portion supported by the rail portion, wherein the projection surface projects an image projected from the projection portion attached to the helmet. The rail portion has a rail hole extending along the arc of the rail portion, The supported portion is inserted into the rail hole and is movable along the rail hole. When the supported portion contacts the front end portion of the rail portion, the combiner is arranged in a display position, and in the display position, the projection surface is arranged in front of the wearer of the helmet. When the supported portion contacts the rear end portion of the rail portion, the combiner is arranged in a retracted position, in which the projection surface is retracted from the front of the wearer. The support portion further includes a positioning portion for positioning the supported portion supported by the rail portion. The positioning portion is configured such that at least one of the front end portion and the rear end portion of the rail portion is displaced and protrudes into the rail hole by an external operation on the positioning portion, thereby positioning the supported portion.

2. The screen device according to claim 1, wherein: The positioning portion is configured to position the supported portion at the display position.

3. The screen device according to claim 1 or 2, wherein: The positioning portion includes a contact portion configured to position the supported portion by contacting the supported portion.

4. The screen device according to claim 3, wherein: The positioning portion is configured to position the supported portion by displacing the contact portion through rotation of a screw having the contact portion.

5. The screen device according to claim 4, wherein: The positioning portion is configured to position the supported portion by displacing the contact portion in a thrust direction as a screw having the contact portion is rotated.

6. A helmet comprising a screen device and a projection unit for projecting an image onto the screen device. The screen device comprises: a support portion having a rail portion for supporting the combiner; and The combiner includes a projection surface and a supported portion supported by the rail portion, wherein the projection surface projects the image projected from the projection portion. The rail portion has a rail hole extending along the arc of the rail portion, The supported portion is inserted into the rail hole and is movable along the rail hole. When the supported portion contacts the front end portion of the rail portion, the combiner is arranged in a display position, and in the display position, the projection surface is arranged in front of the wearer of the helmet. When the supported portion contacts the rear end portion of the rail portion, the combiner is arranged in a retracted position, in which the projection surface is retracted from the front of the wearer. The support portion further includes a positioning portion for positioning the supported portion supported by the rail portion. The positioning portion is configured such that at least one of the front end portion and the rear end portion of the rail portion is displaced and protrudes into the rail hole by an external operation on the positioning portion, thereby positioning the supported portion.

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