Helmet and rear head fixing member

Abstract

To provide a helmet with an improved fit.SOLUTION: A helmet 100a includes an outer shell 1 and a rear head side fixing member 5. A direction perpendicular to an opening 13 of the outer shell 1 is a Z direction, a direction perpendicular to the Z direction is an X direction, and a direction perpendicular to the Z direction and the X direction is a Y direction. An inner peripheral surface 12 has a parietal surface 12T and a pair of temporal surfaces 12R, 12L. The rear head side fixing member 5 has a pair of temporal points 5c1, 5c2, a pair of neck points 5b1, 5b2, and a branch point 5a. The pair of temporal points 5c1, 5c2 are disposed on the pair of temporal surfaces 12R, 12L, respectively. The pair of neck points 5b1, 5b2 are disposed at positions sandwiched between the pair of temporal points 5c1, 5c2. The branch point 5a is disposed at a position sandwiched between the pair of neck points 5b1 and 5b2. The branch point 5a is disposed in a region where the parietal surface 12T is disposed in the Z direction as viewed from the pair of temporal points 5c1, 5c2.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a helmet and a rear-head fixing member. [Background technology]

[0002] Conventionally, efforts have been made to improve the fit of helmets (see, for example, International Publication No. 2005 / 000056). International Publication No. 2005 / 000056 discloses a helmet including a base portion and a stretchable material. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2005 / 000056 Summary of the Invention [Problem to be solved by the invention]

[0004] However, there is a risk that the helmet will not follow the movement of the wearer's head, and therefore there is room for improvement in the fit of the helmet.

[0005] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a helmet with an improved fit. [Means for solving the problem]

[0006] A helmet according to the present disclosure includes an outer shell and a rear-head fixing member. The outer shell has an inner peripheral surface and an opening. The opening is continuous with the inner peripheral surface. A direction perpendicular to the opening is defined as a Z direction. A direction perpendicular to the Z direction is defined as an X direction. A direction perpendicular to the Z direction and the X direction is defined as a Y direction. The inner peripheral surface is concave toward the Z direction. The inner peripheral surface has a parietal surface and a pair of temporal surfaces. The parietal surface is disposed at a position farthest from the opening. The pair of temporal surfaces are disposed so as to sandwich the parietal surface in the X direction. The rear-head fixing member has a pair of temporal points, a pair of neck points, and a bifurcation point. The pair of temporal points are each disposed on the pair of temporal surfaces. The pair of neck points are disposed at a position sandwiched between the pair of temporal points in the X direction. The bifurcation point is disposed at a position sandwiched between the pair of neck points in the X direction. The bifurcation point is disposed in a region where the pair of temporal points are disposed in the Y direction as viewed from the pair of neck points. The branch point is located in a region where the parietal surface is located in the Z direction as viewed from the pair of temporal points. Each of the pair of temporal points is connected to the cervical point via a first flexible portion. Each of the pair of cervical points is connected to the branch point via a second flexible portion.

[0007] The rear head side fixing member according to the present disclosure may be connected to an inner peripheral surface of an outer shell of a helmet. The rear head side fixing member includes a pair of temporal points, a pair of neck points, a bifurcation point, a first flexible portion, and a second flexible portion. The first flexible portion connects each of the pair of temporal points to the neck point. The second flexible portion connects each of the pair of neck points to the bifurcation point. The direction from one temporal point to the other temporal point is defined as the x2 direction. The direction perpendicular to the x2 direction is defined as the y2 direction. The pair of neck points are located at a position sandwiched between the pair of temporal points in the x2 direction. The bifurcation point is located in a region where the pair of temporal points are located in the y2 direction as viewed from the pair of neck points. Effect of the Invention

[0008] Based on the above, a helmet with an improved fit can be obtained. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic perspective view of a helmet according to a first embodiment. [Diagram 2] FIG. 2 is a schematic bottom view of the helmet according to the first embodiment. [Diagram 3] 1 is a schematic side view of a helmet according to a first embodiment. [Figure 4] 4 is a schematic bottom view showing the positional relationship between the inner circumferential surface of the helmet and a rear head side fixing member according to the first embodiment. FIG. [Diagram 5] 3 is a schematic side view showing the positional relationship between the inner circumferential surface of the helmet and a rear head side fixing member in accordance with the first embodiment. FIG. [Figure 6] 3 is a schematic development of a rear head side fixing member in the helmet according to the first embodiment. FIG. [Figure 7] 4 is a schematic rear view of the helmet according to embodiment 1 when the length of the length adjustment mechanism is at its minimum. FIG. [Figure 8] FIG. 4 is a schematic bottom view of the helmet according to the first embodiment when the length of the length adjustment mechanism is at its minimum. [Figure 9] 4 is a schematic rear view of the helmet according to the first embodiment when the length of the length adjustment mechanism is at its maximum. FIG. [Figure 10] FIG. 2 is a schematic bottom view of the helmet according to the first embodiment when the length of the length adjustment mechanism is at its maximum. [Figure 11] 1 is a schematic rear view of a helmet according to a first embodiment when worn. FIG. [Figure 12] FIG. 11 is a schematic side view of a helmet according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described. In the following drawings, the same or corresponding parts are designated by the same reference numerals unless otherwise specified, and the description thereof will not be repeated.

[0011] (Embodiment 1) <Helmet configuration> Fig. 1 is a schematic perspective view of helmet 100a according to embodiment 1. Fig. 2 is a schematic bottom view of helmet 100a according to embodiment 1. Fig. 3 is a schematic side view of helmet 100a according to embodiment 1.

[0012] 1 to 3 is, for example, an industrial helmet 100a. The helmet 100a is worn, for example, on a wearer's head 200. The helmet 100a protects the wearer's head 200 from impacts.

[0013] As shown in FIG. 1 to FIG. 3, the helmet 100a mainly includes an outer shell 1, an interior member 2, and a chin strap 7. The outer shell 1 is shaped like a hemispherical hat having an internal space 14 in which the wearer's head 200 fits. Specifically, the outer shell 1 has an outer peripheral surface 11, an inner peripheral surface 12, and an opening 13. The inner peripheral surface 12 surrounds the internal space 14. The opening 13 is continuous with the inner peripheral surface 12. As shown in FIG. 2 and FIG. 3, the direction perpendicular to the opening 13 is the Z direction. The direction perpendicular to the Z direction is the X direction. The direction perpendicular to the Z direction and the X direction is the Y direction. The inner peripheral surface 12 is concave toward the Z direction. In this way, the outer shell 1 forms the internal space 14 in which the wearer's head 200 fits. The wearer puts on the helmet 100a by inserting the head 200 into the internal space 14 through the opening 13. 1 to 3, the outline of the outer circumferential surface 11 is indicated by a dotted line. In Fig. 3, a part of the inner circumferential surface 12 is not shown.

[0014] As shown in FIG. 1 and FIG. 2, the inner peripheral surface 12 has a parietal surface 12T, a pair of temporal surfaces 12R and 12L, a frontal surface 12F, and an occipital surface 12B. As shown in FIG. 3, the parietal surface 12T is disposed at a position farthest from the opening 13 in the Z direction. The pair of temporal surfaces 12R and 12L are disposed so as to sandwich the parietal surface 12T in the X direction. From a different perspective, the temporal surface 12R is disposed on the opposite side of the region in which the temporal surface 12L is disposed as viewed from the parietal surface 12T in the X direction. The frontal surface 12F and the occipital surface 12B are disposed so as to sandwich the parietal surface 12T in the Y direction. From a different perspective, the occipital surface 12B is disposed on the opposite side of the region in which the frontal surface 12F is disposed as viewed from the parietal surface 12T in the Y direction.

[0015] When a wearer wears the helmet 100a, the inner peripheral surface 12 faces the wearer's head. Specifically, when a wearer wears the helmet 100a, the top surface 12T is located at a position facing the top of the wearer's head. When a wearer wears the helmet 100a, the temporal surfaces 12R and 12L are located at positions facing the sides of the wearer's head. When a wearer wears the helmet 100a, the frontal surface 12F is located at a position facing the front of the wearer's head. When a wearer wears the helmet 100a, the occipital surface 12B is located at a position facing the occipital surface of the wearer's head.

[0016] The interior member 2 is disposed in the internal space 14 of the outer shell 1. The interior member 2 has a front head side fixing member 3, an impact cushioning member 4, and a rear head side fixing member 5.

[0017] As shown in FIG. 3, the shape of the forehead side fixing member 3 is a belt-like shape. The forehead side fixing member 3 extends in a circular shape along the inner peripheral surface 12 in the vicinity of the opening 13. The forehead side fixing member 3 is disposed so as to face the frontal surface 12F and the temporal surfaces 12R and 12L of the inner peripheral surface 12. That is, when the wearer wears the helmet 100a, the forehead side fixing member 3 is disposed at a position where the wearer's forehead and temporal head face each other. In this way, the forehead side fixing member 3 is fixed to the wearer's head 200 in the circumferential direction of the head 200 from the forehead to the temporal head. In addition, when an external impact occurs to the outer shell 1, the forehead side fixing member 3 absorbs the impact on the wearer's head 200.

[0018] The front head side fixing member 3 is connected to the impact buffering member 4. The front head side fixing member 3 may be fixed to the inner peripheral surface 12 so that the relative position with respect to the inner peripheral surface 12 does not change. Therefore, the front head side fixing member 3 may be fixed to the inner peripheral surface 12 by any method, and the front head side fixing member 3 may be mechanically connected to the impact buffering member 4 via the four connecting members 31. The front head side fixing member 3 may be directly connected to the inner peripheral surface 12 using an adhesive. The number of connecting members 31 may be one, two, or four or more. The connecting members 31 may be arranged at any position. Specifically, the four connecting members 31 may be arranged symmetrically about the center of the front head side fixing member 3 extending in a circular shape.

[0019] As shown in FIG. 1, the impact buffering member 4 has a strip-like shape. The strip-like impact buffering member 4 is disposed so as to face the inner peripheral surface 12. The impact buffering member 4 is not directly connected to the inner peripheral surface 12, and is disposed at a distance from the inner peripheral surface 12. When a wearer wears the helmet 100a, the impact buffering member 4 comes into contact with the head 200. In this manner, a space exists between the outer shell 1 and the impact buffering member 4, and therefore, when an external impact occurs to the outer shell 1, the impact buffering member 4 buffers the impact on the wearer's head 200. The impact buffering member 4 may have a strip-like shape, a plate-like shape, or a membrane-like shape.

[0020] The impact cushioning member 4 is mechanically connected to the inner circumferential surface 12 via four connecting members 31. The impact cushioning member 4 may be fixed to the forehead side fixing member 3 so that its relative position with respect to the inner circumferential surface 12 does not change. The impact cushioning member 4 may be connected to the forehead side fixing member 3. The impact cushioning member 4 has a parietal portion 41 and four side portions 42. The parietal portion 41 is disposed at a position opposite to the parietal surface 12T. Each of the four side portions 42 extends from the connecting members 31 along the inner circumferential surface 12. Each of the four side portions 42 is connected to the parietal portion 41.

[0021] The chin strap 7 is connected to the impact cushioning member 4 via a connecting member 31. The chin strap 7 may be connected to the forehead side fixing member 3, or may be directly connected to the outer shell 1. The chin strap 7 may be, for example, a stretchable string. When a wearer wears the helmet 100a, the chin strap 7 passes under the wearer's chin to fix the helmet 100a so that the helmet 100a does not come off the head 200.

[0022] Here, the helmet 100a according to the present embodiment is characterized in that the interior member 2 includes a W-shaped rear head side fixing member 5 as shown in Fig. 6. Fig. 4 is a schematic bottom view showing the positional relationship between the inner circumferential surface 12 of the helmet 100a according to the first embodiment and the rear head side fixing member 5. Fig. 5 is a schematic side view showing the positional relationship between the inner circumferential surface 12 of the helmet 100a according to the first embodiment and the rear head side fixing member 5. Fig. 6 is a schematic development view of the rear head side fixing member 5 in the helmet 100a according to the first embodiment. In Figs. 4 and 5, only the inner circumferential surface 12 of the outer shell 1 and the rear head side fixing member 5 are shown, and the front head side fixing member 3, the impact cushioning member 4, and the chin strap 7 are not shown.

[0023] As shown in Fig. 6, the rear head side fixing member 5 is a flat plate having a W-shaped planar shape. The rear head side fixing member 5 is flexible. Specifically, the material constituting the rear head side fixing member 5 may be a material whose elongation rate is smaller than that of the length adjustment mechanism 6 described below. The material constituting the rear head side fixing member 5 may be any of resins such as low density polyethylene (LDPE), linear low density polyethylene (L-LDPE), high density polyethylene (HDPE), polypropylene (PP), polyacetal (POM), polyamide (PA), thermoplastic elastomer (TPE), and silicone resin.

[0024] 1 to 3, the rear head side fixing member 5 is connected to the front head side fixing member 3 at a pair of temporal points 5c1, 5c2, which will be described later. The rear head side fixing member 5 is connected to the impact cushioning member 4 at a fixing point 5d, which will be described later. The rear head side fixing member 5 is flexible. Therefore, when the rear head side fixing member 5 is disposed in the internal space 14 of the outer shell 1, the shape of the rear head side fixing member 5 follows the shape of the inner circumferential surface 12.

[0025] 6, the rear head side fixing member 5 may be composed of a pair of first flexible portions 51a, 51b, a pair of second flexible portions 52a, 52b, and a third flexible portion 53. The first flexible portion 51a and the second flexible portion 52a cross each other. The first flexible portion 51b and the second flexible portion 52b cross each other. The second flexible portion 52a, the second flexible portion 52b, and the third flexible portion 53 cross each other.

[0026] When the rear head side fixing member 5 is deployed, the pair of first flexible portions 51a, 51b may be curved so as to be concave toward the third flexible portion 53, as shown in FIG.

[0027] A plurality of holes 5h may be formed at the intersection of the first flexible portion 51a and the second flexible portion 52a. The length adjustment mechanism 6, which will be described later, is inserted through the plurality of holes 5h.

[0028] As shown in Fig. 6, the rear head side fixing member 5 has a branch point 5a, a pair of temporal points 5c1 and 5c2, a pair of neck points 5b1 and 5b2, and a fixed point 5d. When the rear head side fixing member 5 is deployed, as shown in Fig. 6, the shape of the rear head side fixing member 5 is a shape that is line-symmetrical with respect to a line passing through the branch point 5a and the fixed point 5d. Specifically, the pair of temporal points 5c1 and 5c2 are arranged to be line-symmetrical with respect to a line passing through the branch point 5a and the fixed point 5d. The pair of neck points 5b1 and 5b2 are arranged to be line-symmetrical with respect to a line passing through the branch point 5a and the fixed point 5d.

[0029] As shown in FIG. 6, the direction from one temporal point 5c1 to the other temporal point 5c2 is defined as the x2 direction. The direction perpendicular to the x2 direction is defined as the y2 direction. The pair of neck points 5b1, 5b2 are located between the pair of temporal points 5c1, 5c2 in the x2 direction. The branch point 5a is located between the pair of neck points 5b1, 5b2 in the x2 direction. The branch point 5a is located in the area where the pair of temporal points 5c1, 5c2 are located in the y2 direction as viewed from the pair of neck points 5b1, 5b2.

[0030] The temporal point 5c1 may be disposed, for example, at one end of the first flexible portion 51a. A plurality of holes 5h may be formed at the other end of the first flexible portion 51a. From a different perspective, a plurality of holes 5h may be formed at one end of the second flexible portion 52a. A branch point 5a may be disposed at the other end of the second flexible portion 52a. The branch point 5a may be a point at which the pair of second flexible portions 52a, 52b cross each other. The neck point 5b1 may be the point at the hole 5h that is the furthest from the branch point 5a.

[0031] The temporal point 5c2 may be disposed, for example, at one end of the first flexible portion 51b. A plurality of holes 5h may be formed at the other end of the first flexible portion 51b. From a different perspective, a plurality of holes 5h may be formed at one end of the second flexible portion 52b. The branch point 5a may be disposed at the other end of the second flexible portion 52b. The neck point 5b2 may be the point at the hole 5h that is the furthest from the branch point 5a.

[0032] The fixed point 5d may be disposed, for example, at one end of the third flexible portion 53. At the other end of the third flexible portion 53, the third flexible portion 53 is connected to the pair of second flexible portions 52a, 52b.

[0033] As shown in FIG. 4, each of the pair of temporal points 5c1, 5c2 is disposed on the pair of temporal planes 12R, 12L. Each of the pair of temporal points 5c1, 5c2 may be fixed so that the relative position with respect to the pair of temporal planes 12R, 12L does not change. For example, the temporal point 5c1 may be directly connected to the temporal plane 12R. As shown in FIG. 1 to FIG. 3, the temporal point 5c1 may be connected to the frontal fixing member 3, so that the temporal point 5c1 is disposed on the temporal plane 12R. The temporal point 5c2 may be directly connected to the temporal plane 12L. As shown in FIG. 1 to FIG. 3, the temporal point 5c2 may be connected to the frontal fixing member 3, so that the temporal point 5c2 is disposed on the temporal plane 12L. The occipital fixing member 5 and the frontal fixing member 3 may be integrated. The rear head side fixing member 5 may have a plurality of V-shaped notches including the branch point 5a and the pair of neck points 5b1, 5b2. Specifically, the rear head side fixing member 5 may include a plurality of pairs of second flexible parts 52a, 52b.

[0034] As shown in Fig. 2, the pair of neck points 5b1, 5b2 are located between the pair of temporal points 5c1, 5c2 in the X direction. The branch point 5a is located between the pair of neck points 5b1, 5b2 in the X direction. From a different perspective, the neck point 5b1 is located between the temporal point 5c1 and the branch point 5a in the X direction. The neck point 5b2 is located between the temporal point 5c2 and the branch point 5a in the X direction.

[0035] 3, the pair of neck points 5b1, 5b2 may be disposed in an area opposite to the area where the branch point 5a is disposed in the Z direction as viewed from the pair of temporal points 5c1, 5c2. The pair of neck points 5b1, 5b2 may be disposed in an area opposite to the area where the branch point 5a is disposed in the Z direction as viewed from the opening 13. In other words, the pair of neck points 5b1, 5b2 do not have to be disposed in the internal space 14.

[0036] 2 and 3, the branch point 5a is disposed within the internal space 14. Specifically, as shown in Fig. 2, the branch point 5a is disposed in a region where the pair of temporal points 5c1, 5c2 are disposed in the Y direction as viewed from the pair of cervical points 5b1, 5b2. As shown in Fig. 5, the branch point 5a is disposed in a region where the parietal surface 12T is disposed in the Z direction as viewed from the pair of temporal points 5c1, 5c2.

[0037] Each of the pair of temporal points 5c1, 5c2 is connected to the cervical points 5b1, 5b2 via the first flexible parts 51a, 51b. Specifically, the temporal point 5c1 is connected to the cervical point 5b1 via the first flexible part 51a. The temporal point 5c2 is connected to the cervical point 5b2 via the first flexible part 51b. Each of the pair of cervical points 5b1, 5b2 is connected to the branch point 5a via the second flexible parts 52a, 52b. Specifically, the cervical point 5b1 is connected to the branch point 5a via the second flexible part 52a. The cervical point 5b2 is connected to the branch point 5a via the second flexible part 52b.

[0038] As shown in Figs. 2 and 3, the fixing point 5d is disposed within the internal space 14. The branch point 5a and the fixing point 5d may be fixed so that their relative positions with respect to the inner circumferential surface 12 do not change. The interior member 2 may be configured, for example, not to include the front head side fixing member 3 and the impact cushioning member 4, and the rear head side fixing member 5 may be directly connected to the outer shell 1. For example, the fixing point 5d may be directly connected to the inner circumferential surface 12. As shown in Figs. 1 to 3, the fixing point 5d may be connected to the top portion 41 of the impact cushioning member 4, so that the fixing point 5d is disposed on the inner circumferential surface 12.

[0039] The branch point 5a and the fixed point 5d are connected to each other via the third flexible portion 53. As shown in FIG. 5, the fixed point 5d may be disposed in a region opposite to the region in which the pair of neck points 5b1, 5b2 are disposed in the Z direction as viewed from the branch point 5a. As shown in FIG. 2, the fixed point 5d may be disposed in a region opposite to the region in which the pair of neck points 5b1, 5b2 are disposed in the Y direction as viewed from the branch point 5a. In this way, even if the distance between the pair of neck points 5b1, 5b2 is adjusted using the length adjustment mechanism 6, the branch point 5a is connected to the fixed point 5d, so that the relative position of the branch point 5a to the inner peripheral surface 12 does not change.

[0040] Due to the shape of the rear head fixing member 5 as described above, when the wearer wears the helmet 100a, the rear head fixing member 5 curves along the shape of the rear head of the wearer. In addition, the contact area between the rear head and neck of the wearer and the rear head fixing member 5 increases. When the distance between the pair of neck points 5b1, 5b2 is adjusted using the length adjustment mechanism 6, the rear head fixing member 5 is fixed to the wearer's head 200 not only in the circumferential direction of the head 200 from the side of the wearer's head to the rear of the head, but also in the vertical direction of the head 200 from the top of the head to the neck. In other words, the helmet 100a follows the movement of the head 200. As a result, the fit of the helmet 100a is improved.

[0041] 6, when the rear head side fixing member 5 is deployed, the acute angle θ1 from one neck point 5b1 to the other neck point 5b2 with the branch point 5a as the origin may be, for example, 45°. The acute angle θ1 may be 35° or more and 55° or less. This improves the fit of the helmet 100a.

[0042] The distance L1 from the branch point 5a to the neck points 5b1, 5b2 may be, for example, 133 mm. If the distance L1 from the branch point 5a to the neck points 5b1, 5b2 is less than 90 mm, the helmet 100a may not follow the movement of the head 200. As a result, the fit of the helmet 100a is reduced. If the distance L1 from the branch point 5a to the neck points 5b1, 5b2 is more than 180 mm, the curvature of the rear head fixing member 5 becomes larger than the roundness of the rear head of the wearer. As a result, the distortion of the rear head fixing member 5 becomes large. In other words, when the wearer wears the helmet 100a, the rear head fixing member 5 hits the base of the neck, and the fit of the helmet 100a is reduced. Therefore, the distance L1 from the branch point 5a to the neck points 5b1, 5b2 may be 90 mm or more and 180 mm or less.

[0043] As shown in FIG. 6, when the occipital fixation member 5 is deployed, the direction extending from the neck points 5b1, 5b2 to the branch point 5a is defined as the x1 direction. The direction perpendicular to the x1 direction is defined as the y1 direction. The distance L2 from the neck points 5b1, 5b2 to the temporal points 5c1, 5c2 in the y1 direction may be, for example, 116 mm. The distance L2 from the neck points 5b1, 5b2 to the temporal points 5c1, 5c2 in the y1 direction may be 90 mm or more and 140 mm or less. The distance L3 from the neck points 5b1, 5b2 to the temporal points 5c1, 5c2 in the x1 direction may be, for example, 40 mm. The distance L3 from the neck points 5b1, 5b2 to the temporal points 5c1, 5c2 in the x1 direction may be 30 mm or more and 60 mm or less. From a different perspective, when the rear head side fixing member 5 is deployed, the linear distance from the neck points 5b1, 5b2 to the temporal points 5c1, 5c2 may be, for example, 123 mm. When the rear head side fixing member 5 is deployed, the linear distance from the neck points 5b1, 5b2 to the temporal points 5c1, 5c2 may be 95 mm or more and 152 mm or less. This improves the fit of the helmet 100a.

[0044] 1 to 3, the rear head side fixing member 5 has a length adjustment mechanism 6. The pair of neck points 5b1, 5b2 are connected to each other by the length adjustment mechanism 6. The wearer uses the length adjustment mechanism 6 to adjust the distance between the pair of neck points 5b1, 5b2.

[0045] The distance between the pair of neck points 5b1, 5b2 may be adjusted by any method. Specifically, the length adjustment mechanism 6 may be either a dial or an adjuster.

[0046] In order to reduce the effort of putting on and taking off the helmet 100a, the length adjustment mechanism 6 may be an elastic body such as rubber, as shown in Figs. 1 to 5. In this way, by adjusting the distance between the pair of neck points 5b1, 5b2 when putting on the helmet 100a for the first time, it becomes unnecessary to adjust the distance between the pair of neck points 5b1, 5b2 when putting on and taking off the helmet 100a thereafter. As a result, the effort of putting on and taking off the helmet 100a is reduced. The distance between the pair of neck points 5b1, 5b2 is fixed except when adjusting the distance between the pair of neck points 5b1, 5b2.

[0047] The elongation of the length adjustment mechanism 6 at a tensile speed of 300±20 mm / min may be more than 0% and less than 400%. The elongation is measured in accordance with the grab method defined in JIS L 1096:2020 Method B. The elongation measured in accordance with the grab method defined in JIS L 1096:2020 Method B is measured under conditions in which the size of the test piece is the size of the length adjustment mechanism 6 used in the actual product.

[0048] The material constituting the length adjustment mechanism 6 may be any foam rubber material such as plastic material, thermoplastic elastomer (TPE), and ethyl vinyl acetate (EVA). The material constituting the length adjustment mechanism 6 may include at least any of flexible composite material, leather, synthetic material, two-way stretch fabric, four-way stretch fabric, elastic composite material, and thin web-like material. The length adjustment mechanism 6 may be a material capable of absorbing sweat of the wearer.

[0049] Fig. 7 is a schematic rear view of helmet 100a according to embodiment 1 when the length of length adjustment mechanism 6 is at its minimum. Fig. 8 is a schematic bottom view of helmet 100a according to embodiment 1 when the length of length adjustment mechanism 6 is at its minimum. As shown in Figs. 7 and 8, before the wearer puts on helmet 100a, the length of length adjustment mechanism 6 may be adjusted to fit the shape of the wearer's back head, thereby shortening the distance between the pair of neck points 5b1, 5b2.

[0050] Fig. 9 is a schematic rear view of helmet 100a according to embodiment 1 when the length of length adjustment mechanism 6 is at its maximum. Fig. 10 is a schematic bottom view of helmet 100a according to embodiment 1 when the length of length adjustment mechanism 6 is at its maximum. As shown in Figs. 9 and 10, before the wearer puts on helmet 100a, the length of length adjustment mechanism 6 may be adjusted to fit the shape of the wearer's back head, thereby adjusting the distance between the pair of neck points 5b1, 5b2 to be longer.

[0051] FIG. 11 is a schematic rear view of the helmet 100a according to the first embodiment when worn. As shown in FIG. 11, when the wearer wears the helmet 100a in which the length adjustment mechanism 6 shown in FIG. 7 and FIG. 8 is at its minimum length, the length of the length adjustment mechanism 6 is extended to match the shape of the wearer's back head. In this way, the distance between the pair of neck points 5b1, 5b2 is adjusted. As a result, when the wearer wears the helmet 100a, the back head side fixing member 5 is curved along the shape of the wearer's back head. In this way, the fit of the helmet 100a is improved. Note that the distance between the pair of neck points 5b1, 5b2 may be adjusted using the length adjustment mechanism 6 after the wearer wears the helmet 100a.

[0052] 6, the rear head side fixing member 5 has a pair of bottom lines 5L1, 5L2. The bottom lines 5L1, 5L2 are disposed on the neck points 5b1, 5b2 sides in the x1 direction as viewed from the branch point 5a. The bottom lines 5L1, 5L2 are furthest from the branch point 5a in the x1 direction.

[0053] As shown in Fig. 7, when the pair of neck points 5b1, 5b2 are brought close to each other using the length adjustment mechanism 6, the pair of bottom lines 5L1, 5L2 may cross each other. Specifically, when the pair of neck points 5b1, 5b2 are brought close to each other using the length adjustment mechanism 6, the angle θ2 formed by the pair of bottom lines 5L1, 5L2 may be an acute angle or an obtuse angle. In this way, when the wearer of the helmet 100a looks up, the rear head side fixing member 5 is prevented from interfering with the neck.

[0054] <Action and effect> A helmet 100a according to the present disclosure includes an outer shell 1 and a rear-head fixing member 5. The outer shell 1 has an inner peripheral surface 12 and an opening 13. The opening 13 is continuous with the inner peripheral surface 12. The direction perpendicular to the opening 13 is the Z direction. The direction perpendicular to the Z direction is the X direction. The direction perpendicular to the Z direction and the X direction is the Y direction. The inner peripheral surface 12 is concave toward the Z direction. The inner peripheral surface 12 has a parietal surface 12T and a pair of temporal surfaces 12R, 12L. The parietal surface 12T is disposed at a position farthest from the opening 13. The pair of temporal surfaces 12R, 12L are disposed to sandwich the parietal surface 12T in the X direction. The rear-head fixing member 5 has a pair of temporal points 5c1, 5c2, a pair of neck points 5b1, 5b2, and a branch point 5a. The pair of temporal points 5c1, 5c2 are disposed on the pair of temporal surfaces 12R, 12L, respectively. The pair of cervical points 5b1, 5b2 are disposed at a position sandwiched between the pair of temporal points 5c1, 5c2 in the X direction. The branch point 5a is disposed at a position sandwiched between the pair of cervical points 5b1, 5b2 in the X direction. The branch point 5a is disposed in a region where the pair of temporal points 5c1, 5c2 are disposed in the Y direction as viewed from the pair of cervical points 5b1, 5b2. The branch point 5a is disposed in a region where the parietal surface 12T is disposed in the Z direction as viewed from the pair of temporal points 5c1, 5c2. Each of the pair of temporal points 5c1, 5c2 is connected to the cervical points 5b1, 5b2 via the first flexible parts 51a, 51b. Each of the pair of cervical points 5b1, 5b2 is connected to the branch point 5a via the second flexible parts 52a, 52b.

[0055] In this way, when the wearer wears the helmet 100a, the rear head side fixing member 5 curves along the shape of the rear head of the wearer. In addition, the contact area between the rear head and neck of the wearer and the rear head side fixing member 5 increases. When the distance between the pair of neck points 5b1, 5b2 is adjusted using the length adjustment mechanism 6, the rear head side fixing member 5 is fixed to the wearer's head 200 not only in the circumferential direction of the head 200 from the side of the wearer's head to the rear head, but also in the vertical direction of the head 200 from the top of the head to the neck. In other words, the helmet 100a follows the movement of the head 200. As a result, the fit of the helmet 100a is improved.

[0056] In the helmet 100a, when the rear head side fixing member 5 is deployed, the acute angle θ1 from the branch point 5a to the other neck point 5b2 is 35° or more and 55° or less, with the branch point 5a as the origin. The distance L1 from the branch point 5a to the neck point 5b1 is 90 mm or more and 180 mm or less.

[0057] In this way, when a wearer wears the helmet 100a, the rear head side fixing member 5 curves to fit the shape of the rear head of the wearer. As a result, the helmet 100a follows the movement of the head 200, improving the fit of the helmet 100a.

[0058] In the helmet 100a, when the rear head side fixing member 5 is deployed, the direction extending from the neck point 5b1 to the branch point 5a is defined as the x1 direction. The direction perpendicular to the x1 direction is defined as the y1 direction. The distance L2 from the neck point 5b1 to the temporal point 5c1 in the y1 direction is 90 mm or more and 140 mm or less. The distance L3 from the neck point 5b1 to the temporal point 5c1 in the x1 direction is 30 mm or more and 60 mm or less.

[0059] In this way, when a wearer wears the helmet 100a, the rear head side fixing member 5 curves to fit the shape of the rear head of the wearer. As a result, the helmet 100a follows the movement of the head 200, improving the fit of the helmet 100a.

[0060] In the above helmet 100a, when the rear head side fixing member 5 is deployed, the distance from the neck point 5b1 to the temporal point 5c1 is not less than 95 mm and not more than 152 mm.

[0061] In this way, when a wearer wears the helmet 100a, the rear head side fixing member 5 curves to fit the shape of the rear head of the wearer. As a result, the helmet 100a follows the movement of the head 200, improving the fit of the helmet 100a.

[0062] In the helmet 100a, the rear head side fixing member 5 has a length adjustment mechanism 6. The pair of neck points 5b1, 5b2 are connected to each other by the length adjustment mechanism 6.

[0063] In this way, the wearer can use the length adjustment mechanism 6 to adjust the distance between the pair of neck points 5b1, 5b2.

[0064] In the helmet 100a, the length adjustment mechanism 6 is an elastic body. In this way, by adjusting the distance between the pair of neck points 5b1, 5b2 when putting on the helmet 100a for the first time, it becomes unnecessary to adjust the distance between the pair of neck points 5b1, 5b2 when putting on or taking off the helmet 100a thereafter. As a result, the effort of putting on and taking off the helmet 100a is reduced.

[0065] In the helmet 100a, when the rear head side fixing member 5 is deployed, the direction extending from the neck point 5b1 to the branching point 5a is defined as the x1 direction. The rear head side fixing member 5 has a pair of bottom lines 5L1, 5L2. The bottom lines 5L1, 5L2 are disposed on the neck point 5b1, 5b2 side in the x1 direction as viewed from the branching point 5a. The bottom lines 5L1, 5L2 are furthest from the branching point 5a in the x1 direction. When the pair of neck points 5b1, 5b2 are close to each other, the pair of bottom lines 5L1, 5L2 may cross each other.

[0066] In this way, when the wearer of the helmet 100a looks up, the rear head side fixing member 5 is prevented from interfering with the neck.

[0067] In the helmet 100a, the rear head side fixing member 5 has a fixing point 5d. The fixing point 5d is disposed in an area opposite to the area where the pair of neck points 5b1, 5b2 are disposed in the Z direction as viewed from the branching point 5a. The fixing point 5d is disposed in an area opposite to the area where the pair of neck points 5b1, 5b2 are disposed in the Y direction as viewed from the branching point 5a.

[0068] In this way, even if the distance between the pair of neck points 5b1, 5b2 is adjusted using the length adjustment mechanism 6, the relative position of the branch point 5a with respect to the inner surface 12 does not change, because the branch point 5a is connected to the fixed point 5d.

[0069] In the above-mentioned helmet 100a, the pair of neck points 5b1, 5b2 are arranged in an area opposite to the area in which the branch point 5a is arranged in the Z direction as viewed from the temporal points 5c1, 5c2.

[0070] In this way, even if the distance between the pair of neck points 5b1, 5b2 is adjusted using the length adjustment mechanism 6, the relative position of the branch point 5a with respect to the inner surface 12 does not change, because the branch point 5a is connected to the fixed point 5d.

[0071] The rear head side fixing member 5 according to the present disclosure can be connected to the inner peripheral surface 12 of the outer shell 1 of the helmet 100a. The rear head side fixing member 5 includes a pair of temporal points 5c1, 5c2, a pair of neck points 5b1, 5b2, a branch point 5a, first flexible parts 51a, 51b, and second flexible parts 52a, 52b. The first flexible parts 51a, 51b connect the pair of temporal points 5c1, 5c2 to the neck points 5b1, 5b2, respectively. The second flexible parts 52a, 52b connect the pair of neck points 5b1, 5b2 to the branch point 5a, respectively. The direction from one temporal point 5c1 to the other temporal point 5c2 is defined as the x2 direction. The direction perpendicular to the x2 direction is defined as the y2 direction. The pair of neck points 5b1, 5b2 are located between the pair of temporal points 5c1, 5c2 in the x2 direction. The branch point 5a is located between the pair of neck points 5b1, 5b2 in the x2 direction. The branch point 5a is located in the area where the pair of temporal points 5c1, 5c2 are located in the y2 direction as viewed from the pair of neck points 5b1, 5b2.

[0072] In this way, when the wearer wears the helmet 100a, the rear head side fixing member 5 curves along the shape of the rear head of the wearer. In addition, the contact area between the rear head and neck of the wearer and the rear head side fixing member 5 increases. When the distance between the pair of neck points 5b1, 5b2 is adjusted using the length adjustment mechanism 6, the rear head side fixing member 5 is fixed to the wearer's head 200 not only in the circumferential direction of the head 200 from the side of the wearer's head to the rear head, but also in the vertical direction of the head 200 from the top of the head to the neck. In other words, the helmet 100a follows the movement of the head 200. As a result, the fit of the helmet 100a is improved.

[0073] In order to confirm the effectiveness of the helmet 100a according to the present embodiment as described above, a sensory test of the helmet 100a was carried out.

[0074] (Sensory test) In this test, seven wearers wore the helmets according to Sample 1 and Sample 2 and evaluated the fit of the helmets. The helmet according to Sample 1 is a comparative example. The helmet according to Sample 2 is an example.

[0075] The interior member 2 of the helmet in sample 1 is composed of an impact cushioning member 4, a forehead fixing member 3, and a length adjustment mechanism 6, and does not include a rear head fixing member 5. In addition, the length adjustment mechanism 6 of the helmet in sample 1 uses an adjuster rather than an elastic body.

[0076] The interior member 2 of the helmet according to sample 2 is composed of an impact cushioning member 4, a forehead fixing member 3, a length adjustment mechanism 6, and a rear head fixing member 5. The length adjustment mechanism 6 of the helmet according to sample 2 is made of rubber, which is an elastic body.

[0077] As a result of the sensory test, two out of seven wearers evaluated that the helmet according to Sample 1 provided a better fit than the helmet according to Sample 2. On the other hand, five out of seven wearers evaluated that the helmet according to Sample 2 provided a better fit than the helmet according to Sample 1.

[0078] In this manner, the effectiveness of helmet 100a according to the first embodiment having rear head side fixing member 5 was confirmed.

[0079] (Embodiment 2) <Helmet structure> Fig. 12 is a schematic side view of a helmet 100b according to the second embodiment. Fig. 12 corresponds to Fig. 2. The helmet 100b shown in Fig. 12 basically has the same configuration as the helmet 100b shown in Figs. 1 to 11 and can obtain the same effects, but is different in that the helmet 100b is not for industrial use but is a helmet 100b for a baseball catcher. As shown in Fig. 12, the helmet 100b according to the second embodiment may not include a chin strap 7. Also, the interior member 2 may not include a forehead side fixing member 3.

[0080] As shown in Fig. 12, the outer shell 1 has a protrusion 15. When a wearer wears the helmet 100b, the protrusion 15 covers the neck of the wearer. Specifically, as shown in Fig. 12, the protrusion 15 is formed so as to protrude from the opening 13. The protrusion 15 may be formed so that a pair of neck points 5b1, 5b2 face the protrusion 15. The protrusion 15 is located on the opposite side of the opening 13 in the Z direction to the region where the top surface 12T of the inner circumferential surface 12 is located.

[0081] The impact cushioning member 4 of the helmet 100b according to the second embodiment is not a belt-shaped impact cushioning member 4 but an impact cushioning member 4 having cushioning properties. The material constituting the impact cushioning member 4 may be, for example, the same as the material constituting the forehead side fixing member 3. Specifically, the material constituting the impact cushioning member 4 and the forehead side fixing member 3 may be, for example, a foam. Therefore, the impact cushioning member 4 and the forehead side fixing member 3 may be directly connected to the inner circumferential surface 12. In this way, any configuration may be adopted for the interior member 2. For example, the interior member 2 may be configured not to include the impact cushioning member 4 and the forehead side fixing member 3.

[0082] As shown in FIG. 12, a cushioning member 4a may be disposed on the inner peripheral surface 12 in the vicinity of the opening 13. The material constituting the member 4a is, for example, sponge. The material constituting the member 4a may be the same material as the shock-absorbing member 4. The rear head side fixing member 5 is directly connected to the inner peripheral surface 12. Each of the temporal points 5c1, 5c2 of the rear head side fixing member 5 is disposed so as to be sandwiched between each of the temporal surfaces 12L, 12R and the member 4a. The member 4a may be disposed on the protruding portion 15.

[0083] The embodiments disclosed herein should be considered to be illustrative and not restrictive in all respects. Unless inconsistent, at least two or more of the embodiments disclosed herein may be combined. The basic scope of the present disclosure is indicated by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0084] 1 outer shell, 2 interior member, 3 frontal fixing member, 4 impact cushioning member, 4a member, 5 rear fixing member, 5a branch point, 5b1, 5b2 neck point, 5c1, 5c2 temporal point, 5d fixing point, 5h hole, 5L1, 5L2 bottom line, 6 length adjustment mechanism, 7 chin strap, 11 outer peripheral surface, 12 inner peripheral surface, 12B rear surface, 12F frontal surface, 12L, 12R temporal surface, 12T parietal surface, 13 opening, 14 internal space, 15 protruding portion, 31 connecting member, 41 parietal portion, 42 side portion, 51a, 51b first flexible portion, 52a, 52b second flexible portion, 53 third flexible portion, 100a, 100b helmet, 200 head, L1, L2, L3 Distance, θ1 acute angle, θ2 angle.

Claims

1. An outer shell having an inner circumferential surface and an opening communicating with the inner circumferential surface; A rear head side fixing member is provided. A direction perpendicular to the opening is defined as a Z direction, A direction perpendicular to the Z direction is defined as an X direction, If the direction perpendicular to the Z direction and the X direction is defined as the Y direction, The inner circumferential surface is concave in the Z direction, The inner circumferential surface has a top surface disposed at a position farthest from the opening, and a pair of side surfaces disposed to sandwich the top surface in the X direction, The occipital side fixation member has a pair of temporal points each disposed on a pair of the temporal surfaces, a pair of neck points disposed at a position sandwiched between the pair of temporal points in the X direction, and a branch point disposed at a position sandwiched between the pair of neck points in the X direction, the branch point is disposed in a region in which the pair of temporal points are disposed in the Y direction as viewed from the pair of cervical points, the branch point is disposed in a region in which the parietal surface is disposed in the Z direction as viewed from the pair of temporal points, Each of the pair of temporal points is connected to the cervical point via a first flexible portion, A helmet, wherein each of the pair of neck points is connected to the branch point via a second flexible portion.

2. When the rear head side fixing member is deployed, With the branch point as the origin, an acute angle from one neck point to the other neck point is 35° or more and 55° or less, 2. The helmet according to claim 1, wherein the distance from the branch point to the neck point is 90 mm or more and 180 mm or less.

3. When the rear head side fixing member is deployed, The direction extending from the neck point to the branch point is x １ The direction is The x １ The direction perpendicular to the y direction is １ In terms of direction, The y １ The distance from the neck point to the temporal point in the direction is 90 mm or more and 140 mm or less; The x １ 3. The helmet according to claim 1, wherein a distance from the neck point to the temporal point in a direction is 30 mm or more and 60 mm or less.

4. When the rear head side fixing member is deployed, 3. The helmet according to claim 1, wherein the distance from the neck point to the temporal point is equal to or greater than 95 mm and equal to or less than 152 mm.

5. The rear head side fixing member has a length adjustment mechanism, 3. The helmet according to claim 1, wherein the pair of neck points are connected to each other by the length adjustment mechanism.

6. The helmet according to claim 5 , wherein the length adjustment mechanism is an elastic body.

7. When the rear head side fixing member is deployed, The direction extending from the neck point to the branch point is x １ The direction is The rear head side fixing member has a pair of bottom lines, The bottom line is the x １ A branch point is disposed on the neck point side in the x direction. １ furthest apart in the direction, 3. The helmet according to claim 1 or 2, wherein when a pair of said neck points are close to each other, a pair of said lowest lines may cross each other.

8. The rear head side fixing member has a fixing point, The fixed point is disposed in a region opposite to a region in which the pair of neck points are disposed in the Z direction as viewed from the branch point, The helmet according to claim 1 or 2, wherein the fixed point is located in an area opposite to an area in which the pair of neck points are located in the Y direction as viewed from the branching point.

9. 3. The helmet according to claim 1, wherein the pair of neck points are arranged in an area opposite to an area in which the branch point is arranged in the Z direction as viewed from the temporal point.

10. A rear head side fixing member that can be connected to an inner peripheral surface of an outer shell of a helmet, A pair of temporal points; A pair of neck points, The branching point, A first flexible portion connecting each of the pair of temporal points and the neck point; a second flexible portion connecting each of the pair of neck points and the branch point; The direction from one temporal point to the other temporal point is defined as x ２ The direction is The x ２ The direction perpendicular to the y direction is ２ In terms of direction, The pair of neck points are ２ The pair of temporal points are located at a position between the pair of temporal points in the direction of the head, The branch point is the x ２ The neck point is located between the pair of neck points in the direction of the The branch point is located at the y ２ The rear head side fixation member is arranged in a region in the direction in which the pair of temporal points are arranged.

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