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 side 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 may not follow the movement of the wearer's head, which leaves 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 an occipital fixation member. The outer shell has an inner peripheral surface and an opening. The opening is continuous with the inner peripheral surface. The direction perpendicular to the opening is defined as the Z direction. The direction perpendicular to the Z direction is defined as the X direction. The direction perpendicular to the Z direction and the X direction is defined as the 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 located at a position farthest from the opening. The pair of temporal surfaces are located to sandwich the parietal surface in the X direction. The occipital fixation member has a pair of temporal points, a pair of cervical points, and a bifurcation point. The pair of temporal points are each located on the pair of temporal surfaces. The pair of cervical points are located at a position sandwiched between the pair of temporal points in the X direction. The bifurcation point is located at a position sandwiched between the pair of cervical points in the X direction. The bifurcation point is located in a region where the pair of temporal points are located in the Y direction as viewed from the pair of cervical points. The branch point is located in a region where the parietal plane 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 occipital fixation member according to the present disclosure can be connected to the inner circumferential surface of the helmet shell. The occipital fixation 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 between the pair of temporal points in the x2 direction. The bifurcation point is located between the pair of neck points in the x2 direction. The bifurcation point is located in the area where the pair of temporal points are located in the y2 direction as viewed from the pair of neck points. [Effects of the Invention]

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

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

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings, in which: FIG.

[0011] (Embodiment 1) <Helmet configuration> Fig. 1 is a schematic perspective view of a helmet 100a according to embodiment 1. Fig. 2 is a schematic bottom view of the helmet 100a according to embodiment 1. Fig. 3 is a schematic side view of the 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 FIGS. 1 to 3, helmet 100a mainly includes an outer shell 1, an interior member 2, and a chin strap 7. Outer shell 1 is shaped like a hemispherical helmet having an interior space 14 for fitting a wearer's head 200 therein. Specifically, outer shell 1 has an outer peripheral surface 11, an inner peripheral surface 12, and an opening 13. Inner peripheral surface 12 surrounds interior space 14. Opening 13 is continuous with inner peripheral surface 12. As shown in FIGS. 2 and 3, the direction perpendicular to opening 13 is defined as the Z direction. The direction perpendicular to the Z direction is defined as the X direction. The direction perpendicular to the Z direction and the X direction is defined as the Y direction. Inner peripheral surface 12 is concave toward the Z direction. In this manner, outer shell 1 forms interior space 14 for fitting a wearer's head 200 therein. A wearer puts on helmet 100a by inserting head 200 into interior space 14 through opening 13. 1 to 3, the outline of the outer peripheral surface 11 is shown by a dotted line. In Fig. 3, a part of the inner peripheral surface 12 is not shown.

[0014] As shown in FIGS. 1 and 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 located at a position farthest from the opening 13 in the Z direction. The pair of temporal surfaces 12R and 12L are located to sandwich the parietal surface 12T in the X direction. From a different perspective, the temporal surface 12R is located on the opposite side of the region where the temporal surface 12L is located from the parietal surface 12T in the X direction. The frontal surface 12F and the occipital surface 12B are located to sandwich the parietal surface 12T in the Y direction. From a different perspective, the occipital surface 12B is located on the opposite side of the region where the frontal surface 12F is located 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 forehead of the wearer. 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 buffering member 4, and an occipital side fixing member 5.

[0017] As shown in FIG. 3 , the forehead side fixing member 3 has a band-like shape. The forehead side fixing member 3 extends circularly along the inner circumferential surface 12 near 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 circumferential surface 12. In other words, when a wearer wears the helmet 100a, the forehead side fixing member 3 is disposed in a position where the wearer's forehead and temporal surfaces face each other. In this manner, 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 areas. Furthermore, when an external impact is applied to the outer shell 1, the forehead side fixing member 3 absorbs the impact on the wearer's head 200.

[0018] The forehead side fixing member 3 is connected to the impact-absorbing member 4. The forehead side fixing member 3 may be fixed to the inner circumferential surface 12 so that its relative position with respect to the inner circumferential surface 12 does not change. Therefore, the forehead side fixing member 3 may be fixed to the inner circumferential surface 12 by any method, and the forehead side fixing member 3 may be mechanically connected to the impact-absorbing member 4 via four connecting members 31. The forehead side fixing member 3 may also be directly connected to the inner circumferential 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 in any position. Specifically, the four connecting members 31 may be arranged symmetrically about the center of the circularly extending forehead side fixing member 3.

[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 circumferential surface 12. The impact buffering member 4 is not directly connected to the inner circumferential surface 12, but is disposed at a distance from the inner circumferential surface 12. When a wearer wears the helmet 100a, the impact buffering member 4 comes into contact with the head 200. This creates a space between the outer shell 1 and the impact buffering member 4, so that when an external impact occurs to the outer shell 1, the impact buffering member 4 absorbs the impact on the wearer's head 200. The impact buffering member 4 may be shaped like a strip, a plate, or a film.

[0020] The impact buffering member 4 is mechanically connected to the inner circumferential surface 12 via four connecting members 31. The impact buffering member 4 may be fixed to the forehead side fixing member 3 so that its position relative to the inner circumferential surface 12 does not change. The impact buffering member 4 may be connected to the forehead side fixing member 3. The impact buffering member 4 has a parietal portion 41 and four side portions 42. The parietal portion 41 is positioned opposite the parietal surface 12T. Each of the four side portions 42 extends from the connecting member 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-absorbing member 4 via the connecting member 31. The chin strap 7 may be connected to the forehead side fixing member 3, or may be connected directly to the outer shell 1. The chin strap 7 may be, for example, an elastic string. When the wearer puts on the helmet 100a, the chin strap 7 passes under the wearer's chin to fix the helmet 100a in place so that the helmet 100a does not come off the head 200.

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

[0023] As shown in FIG. 6, the occipital fixation member 5 is a flat plate with a W-shaped planar shape. The occipital fixation member 5 is flexible. Specifically, the material constituting the occipital fixation member 5 may be any material as long as its elongation rate is smaller than that of the length adjustment mechanism 6 (described later). The material constituting the occipital fixation member 5 may be any resin, 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), or silicone resin.

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

[0025] 6, the occipital side fixation 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 intersect with each other. The first flexible portion 51b and the second flexible portion 52b intersect with each other. The second flexible portion 52a, the second flexible portion 52b, and the third flexible portion 53 intersect with each other.

[0026] When the occipital region 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 occipital side fixation member 5 has a branching 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 occipital side fixation member 5 is unfolded, as shown in Fig. 6, the shape of the occipital side fixation member 5 is line-symmetrical with respect to a line passing through the branching point 5a and the fixed point 5d. Specifically, the pair of temporal points 5c1 and 5c2 are arranged line-symmetrical with respect to a line passing through the branching point 5a and the fixed point 5d. The pair of neck points 5b1 and 5b2 are arranged line-symmetrical with respect to a line passing through the branching 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 cervical points 5b1 and 5b2 are located between the pair of temporal points 5c1 and 5c2 in the x2 direction. The branch point 5a is located between the pair of cervical points 5b1 and 5b2 in the x2 direction. The branch point 5a is located in the region where the pair of temporal points 5c1 and 5c2 are located in the y2 direction as viewed from the pair of cervical points 5b1 and 5b2.

[0030] The temporal point 5c1 may be located, 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 located at the other end of the second flexible portion 52a. The branch point 5a may be a point where the pair of second flexible portions 52a, 52b intersect with each other. The cervical point 5b1 may be the point on the hole 5h that is farthest from the branch point 5a.

[0031] The temporal point 5c2 may be located, 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. A branch point 5a may be located at the other end of the second flexible portion 52b. The cervical point 5b2 may be the point at the hole 5h that is farthest 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 and 52b.

[0033] As shown in FIG. 4, each of the pair of temporal points 5c1, 5c2 is positioned on the pair of temporal planes 12R, 12L. Each of the pair of temporal points 5c1, 5c2 may be fixed so that its 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 FIGS. 1 to 3, the temporal point 5c1 may be connected to the frontal side fixation member 3, thereby positioning the temporal point 5c1 on the temporal plane 12R. The temporal point 5c2 may be directly connected to the temporal plane 12L. As shown in FIGS. 1 to 3, the temporal point 5c2 may be connected to the frontal side fixation member 3, thereby positioning the temporal point 5c2 on the temporal plane 12L. The occipital side fixation member 5 and the frontal side fixation member 3 may be integrated. The rear head side fixing member 5 may have a plurality of V-shaped notches formed therein, each including the branch point 5a and a pair of neck points 5b1, 5b2. Specifically, the rear head side fixing member 5 may include a plurality of pairs of second flexible portions 52a, 52b.

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

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

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

[0037] The pair of temporal points 5c1 and 5c2 are connected to the cervical points 5b1 and 5b2 via the first flexible portions 51a and 51b, respectively. Specifically, the temporal point 5c1 is connected to the cervical point 5b1 via the first flexible portion 51a. The temporal point 5c2 is connected to the cervical point 5b2 via the first flexible portion 51b. The pair of cervical points 5b1 and 5b2 are connected to the branch point 5a via the second flexible portions 52a and 52b, respectively. Specifically, the cervical point 5b1 is connected to the branch point 5a via the second flexible portion 52a. The cervical point 5b2 is connected to the branch point 5a via the second flexible portion 52b.

[0038] As shown in FIGS. 2 and 3, the fixed point 5d is disposed within the interior space 14. The branch point 5a and the fixed 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, for example, be configured without including the forehead side fixing member 3 and the impact-absorbing member 4, and the occipital side fixing member 5 may be directly connected to the outer shell 1. For example, the fixed point 5d may be directly connected to the inner circumferential surface 12. As shown in FIGS. 1 to 3, the fixed point 5d may be connected to the parietal portion 41 of the impact-absorbing member 4, thereby disposing the fixed point 5d on the inner circumferential surface 12.

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

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

[0041] As shown in Fig. 6, when the occipital side fixing member 5 is deployed, the acute angle θ1 from one neck point 5b1 to the other neck point 5b2, with the branching point 5a as the origin, may be, for example, 45°. The acute angle θ1 may be 35° or greater 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 and 5b2 may be, for example, 133 mm. If the distance L1 from the branch point 5a to the neck points 5b1 and 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 may be reduced. If the distance L1 from the branch point 5a to the neck points 5b1 and 5b2 is more than 180 mm, the curvature of the occipital fixing member 5 becomes greater than the curvature of the wearer's occipital region. As a result, the distortion of the occipital fixing member 5 increases. In other words, when the wearer wears the helmet 100a, the occipital fixing member 5 hits the base of the neck, reducing the fit of the helmet 100a. Therefore, the distance L1 from the branch point 5a to the neck points 5b1 and 5b2 may be 90 mm or more and 180 mm or less.

[0043] As shown in FIG. 6 , when the occipital side fixation member 5 is deployed, the direction extending from the cervical points 5b1 and 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 cervical points 5b1 and 5b2 to the temporal points 5c1 and 5c2 in the y1 direction may be, for example, 116 mm. The distance L2 from the cervical points 5b1 and 5b2 to the temporal points 5c1 and 5c2 in the y1 direction may be 90 mm or more and 140 mm or less. The distance L3 from the cervical points 5b1 and 5b2 to the temporal points 5c1 and 5c2 in the x1 direction may be 40 mm, for example. The distance L3 from the cervical points 5b1 and 5b2 to the temporal points 5c1 and 5c2 in the x1 direction may be 30 mm or more and 60 mm or less. From a different perspective, when the occipital 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 occipital 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 occipital 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] To reduce the effort required to put on and take off the helmet 100a, the length adjustment mechanism 6 may be made of an elastic material such as rubber, as shown in Figures 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 or taking off the helmet 100a thereafter. As a result, the effort required to put on and take off the helmet 100a is reduced. Note that 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 greater than 0% and less than 400%. The elongation is measured in accordance with the grab method specified in JIS L 1096:2020, Method B. Note that the elongation measured in accordance with the grab method specified in JIS L 1096:2020, Method B, is measured under conditions where the size of the test piece is the same as the size of the length adjustment mechanism 6 used in the actual product.

[0048] The length adjustment mechanism 6 may be made of a material such as a plastic material, a thermoplastic elastomer (TPE), or a foam rubber material such as ethyl vinyl acetate (EVA). The length adjustment mechanism 6 may be made of a material such as a flexible composite material, leather, a synthetic material, a two-way stretch fabric, a four-way stretch fabric, an elastic composite material, or a thin web-like material. The length adjustment mechanism 6 may be made of a material that can absorb sweat from 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 wearing helmet 100a, the wearer may adjust the length of length adjustment mechanism 6 to fit the shape of the wearer's back of the 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 putting on helmet 100a, the wearer may adjust the length of length adjustment mechanism 6 to fit the shape of the wearer's back of the 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 helmet 100a according to embodiment 1 when worn. As shown in FIG. 11, when a wearer wears helmet 100a with length adjustment mechanism 6 set to the minimum length, as shown in FIGS. 7 and 8, for example, the length of length adjustment mechanism 6 increases to fit the shape of the wearer's occipital region. In this manner, the distance between the pair of neck points 5b1, 5b2 is adjusted. As a result, when the wearer wears helmet 100a, occipital fixing member 5 curves to fit the shape of the wearer's occipital region. In this manner, the fit of helmet 100a is improved. Note that the distance between the pair of neck points 5b1, 5b2 may be adjusted using length adjustment mechanism 6 after the wearer has worn helmet 100a.

[0052] As shown in Fig. 6, the occipital side fixation member 5 has a pair of bottom lines 5L1, 5L2. The bottom lines 5L1, 5L2 are located on the neck points 5b1, 5b2 side in the x1 direction as viewed from the branch point 5a. The bottom lines 5L1, 5L2 are the farthest from the branch point 5a in the x1 direction.

[0053] 7, when the pair of neck points 5b1, 5b2 are brought closer to each other using the length adjustment mechanism 6, the pair of bottom lines 5L1, 5L2 may intersect with each other. Specifically, when the pair of neck points 5b1, 5b2 are brought closer to each other using the length adjustment mechanism 6, the angle θ2 formed by the pair of bottom lines 5L1, 5L2 may be either an acute angle or an obtuse angle. In this way, when the wearer of the helmet 100a looks up, interference of the occipital fixing member 5 with the neck is suppressed.

[0054] <Action and effect> A helmet 100a according to the present disclosure includes an outer shell 1 and an occipital 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 defined as the Z direction. The direction perpendicular to the Z direction is defined as the X direction. The direction perpendicular to the Z direction and the X direction is defined as 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 and 12L. The parietal surface 12T is located at a position farthest from the opening 13. The pair of temporal surfaces 12R and 12L are located on either side of the parietal surface 12T in the X direction. The occipital fixing member 5 has a pair of temporal points 5c1 and 5c2, a pair of neck points 5b1 and 5b2, and a bifurcation point 5a. The pair of temporal points 5c1, 5c2 are located on the pair of temporal planes 12R, 12L, respectively. The pair of cervical points 5b1, 5b2 are located at a position sandwiched between the pair of temporal points 5c1, 5c2 in the X direction. The branch point 5a is located at a position sandwiched between the pair of cervical points 5b1, 5b2 in the X direction. The branch point 5a is located in the region where the pair of temporal points 5c1, 5c2 are located in the Y direction as viewed from the pair of cervical points 5b1, 5b2. The branch point 5a is located in the region where the parietal plane 12T is located in the Z direction as viewed from the pair of temporal points 5c1, 5c2. The pair of temporal points 5c1, 5c2 are connected to the cervical points 5b1, 5b2 via first flexible portions 51a, 51b. The pair of cervical points 5b1, 5b2 are connected to the branch point 5a via second flexible portions 52a, 52b.

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

[0056] In the helmet 100a, when the rear-head 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, is between 35° and 55°. The distance L1 from the branch point 5a to the neck point 5b1 is between 90 mm and 180 mm.

[0057] In this way, when a wearer puts on 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 described above, when the occipital 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 direction perpendicular to the x1 direction is defined as the y1 direction. In the y1 direction, the distance L2 from the neck point 5b1 to the temporal point 5c1 is 90 mm or more and 140 mm or less. In the x1 direction, the distance L3 from the neck point 5b1 to the temporal point 5c1 is 30 mm or more and 60 mm or less.

[0059] In this way, when a wearer puts on 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-mentioned helmet 100a, when the occipital 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 puts on 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, which reduces the effort required to put on or take off the helmet 100a.

[0065] In the above-described helmet 100a, when the rear head 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 rear head fixing member 5 has a pair of bottom lines 5L1, 5L2. The bottom lines 5L1, 5L2 are positioned on the neck point 5b1, 5b2 side 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. When the pair of neck points 5b1, 5b2 approach 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 above-described helmet 100a, the rear head side fixing member 5 has a fixing point 5d. The fixing point 5d is located in an area opposite the area where the pair of neck points 5b1, 5b2 are located in the Z direction as viewed from the branching point 5a. The fixing point 5d is located in an area opposite the area where the pair of neck points 5b1, 5b2 are located 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 helmet 100a, the pair of neck points 5b1 and 5b2 are located in an area opposite to the area where the bifurcation point 5a is located in the Z direction as viewed from the temporal points 5c1 and 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 occipital fixation member 5 according to the present disclosure can be connected to the inner circumferential surface 12 of the outer shell 1 of the helmet 100a. The occipital fixation member 5 includes a pair of temporal points 5c1 and 5c2, a pair of neck points 5b1 and 5b2, a bifurcation point 5a, first flexible portions 51a and 51b, and second flexible portions 52a and 52b. The first flexible portions 51a and 51b connect each of the pair of temporal points 5c1 and 5c2 to the neck points 5b1 and 5b2. The second flexible portions 52a and 52b connect each of the pair of neck points 5b1 and 5b2 to the bifurcation point 5a. 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 cervical points 5b1 and 5b2 are located between the pair of temporal points 5c1 and 5c2 in the x2 direction. The branch point 5a is located between the pair of cervical points 5b1 and 5b2 in the x2 direction. The branch point 5a is located in the area where the pair of temporal points 5c1 and 5c2 are located in the y2 direction as viewed from the pair of cervical points 5b1 and 5b2.

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

[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 of Sample 1 is composed of an impact-absorbing member 4, a forehead fixing member 3, and a length adjustment mechanism 6, and does not include an occipital fixing member 5. Furthermore, the length adjustment mechanism 6 of the helmet of Sample 1 uses an adjuster rather than an elastic body.

[0076] The interior member 2 of the helmet of Sample 2 is composed of an impact-absorbing member 4, a forehead fixing member 3, a length adjustment mechanism 6, and an occipital fixing member 5. The length adjustment mechanism 6 of the helmet of Sample 2 is made of rubber, which is an elastic material.

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

[0078] In this way, the effectiveness of helmet 100a according to the first embodiment, which has 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 achieve the same effects, but differs in that the helmet 100b is not for industrial use but is a baseball catcher's helmet 100b. As shown in FIG. 12, the helmet 100b according to the second embodiment does not have to include a chin strap 7. Furthermore, the interior member 2 does not have to 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 wearer's neck. Specifically, as shown in Fig. 12, the protrusion 15 is formed to protrude from the opening 13. The protrusion 15 may be formed so that the 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 from the region where the parietal surface 12T of the inner circumferential surface 12 is located.

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

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

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

[0084] 1 outer shell, 2 interior member, 3 forehead side fixing member, 4 impact absorbing member, 4a member, 5 occipital side 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 occipital surface, 12F frontal surface, 12L, 12R temporal surface, 12T parietal surface, 13 opening, 14 internal space, 15 protrusion, 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; and a rear head side fixing member, 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, then 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 respectively disposed on the pair of temporal planes, a pair of cervical points disposed at positions sandwiched between the pair of temporal points in the X direction, and a branch point disposed at a position sandwiched between the pair of cervical points in the X direction, the branch points are arranged in a region where the pair of temporal points are arranged in the Y direction as viewed from the pair of cervical 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 neck points is connected to the branch point via a second flexible portion, The branching point is a portion where the first flexible portion branches into two.

2. When the rear head side fixing member is deployed, The acute angle from one neck point to the other neck point is equal to or greater than 35° and equal to or less than 55°, with the bifurcation point as the origin, 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 defined as x １ As a direction, The x １ The direction perpendicular to the direction is y １ As a direction, The y １ The distance from the cervical 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 the distance from the neck point to the temporal point in the 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 defined as x １ As a direction, The rear head side fixing member has a pair of bottom lines, The bottom line is the x １ The branch point is located on the neck point side in the x direction. １ The furthest apart in the direction 3. The helmet according to claim 1, wherein when a pair of the neck points are close to each other, a pair of the lowermost 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 fixing 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 located in regions opposite to the region in which the branch points are located in the Z direction as viewed from the temporal points.

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 and a first flexible portion connecting each of the pair of temporal points to the cervical point; a second flexible portion connecting each of the pair of neck points to the branch point; The direction from one temporal point to the other temporal point is defined as x ２ As a direction, The x ２ The direction perpendicular to the direction is y ２ As a direction, The pair of neck points is the x ２ and the head is located at a position sandwiched between the pair of temporal points in the direction of the head, The branch point is the x ２ and the pair of neck points are located at positions sandwiched between the pair of neck points in the direction of the The branch point is located at the y ２ The pair of temporal points are arranged in the direction of the vertex, the branch point is a portion where the first flexible portion branches into two, The rear-of-head side fixing member has a W-shaped planar shape.

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