Protective helmet, helmet body and shock absorber

Abstract

To provide a protective helmet that can withstand impact force and protect the head of a wearer even when it is lightweight.SOLUTION: There is provided a protective helmet 1: having a cap body 3 with a space 17 formed in upper and middle portions 7 because the upper and middle portions 7, which are an upper portion 13 and a middle portion 15, have a double structure with a thin upper wall portion 9 and a thin lower wall portion 11; and a plurality of shock absorbers 5 supported by at least one of the upper wall portion 9 and the lower wall portion 11 and are provided in the space 17 of the upper and middle portions 7 at a distance from each other.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present invention relates to a protective cap, a cap body, and an impact absorber. [Background technology]

[0002] Conventionally, a protective cap has been known that includes a cap body, a hard top cover, and a shock absorber (see Patent Document 1). In the conventional protective cap, the top cover has a predetermined width in the left-right direction. The top cover also extends long in the front-to-rear direction and is attached so as to cover the outer surface of the cap body, including the top part. Furthermore, a recess is provided in the portion of the cap body covered by the top cover, and a shock absorber is disposed in the recess. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-147731 Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional protective helmets described above, the helmet body is made of low-foam polypropylene, but the helmet body is thick to withstand impact forces and protect the wearer's head, which makes it difficult to reduce the weight.

[0005] To provide a protective cap that can withstand impact force and protect the head of a wearer even when it is lightweight, a cap body that constitutes the protective cap, and a shock absorber that constitutes the protective cap. [Means for solving the problem]

[0006] The protective helmet according to one aspect of the present invention has a helmet body in which the upper and middle sections, which combine the upper and middle sections, have a double structure with a thin upper wall section and a thin lower wall section, thereby forming a space in the upper and middle sections, and a plurality of impact absorbers that are supported by at least one of the upper wall section and the lower wall section and are spaced apart from each other and are provided in the space in the upper and middle sections.

[0007] In a protective cap according to one aspect of the present invention, the cap body is configured to include a cap body main body and an outer, and the cap body main body is integrated into a shape that combines the lower part of the cap body and the lower wall portion, and the outer is configured as a separate body from the cap body main body, and the outer is installed on the cap body main body so that the outer forms the upper wall portion.

[0008] In the protective cap according to this aspect of the present invention, the impact absorbing body is installed on the cap body, and a gap is formed between the impact absorbing body and the outer.

[0009] In a protective helmet according to one aspect of the present invention, the helmet body is configured to include a helmet body main body and an inner liner, and the helmet body main body is integrated into a shape that combines the lower portion of the helmet body with the upper wall portion, and the inner liner is configured separately from the helmet body main body, and when the inner liner is installed on the helmet body main body, the inner liner forms the lower wall portion.

[0010] In the protective cap according to this aspect of the present invention, the impact absorbing body is installed on the inner, and a gap is formed between the impact absorbing body and the cap body.

[0011] The protective cap according to this aspect of the present invention has a cushioning material that is provided on the lower wall portion and that comes into contact with the wearer's head when the wearer puts on the protective cap.

[0012] In a protective helmet according to one aspect of the present invention, the impact absorber is configured to include an inner tubular portion and an outer tubular portion located outside the inner tubular portion, and is configured such that when a force directed toward the inside of the helmet body is applied to the outer surface of the upper wall portion of the helmet body, the inner tubular portion deforms to mitigate the force applied to the upper wall portion.

[0013] In a protective helmet according to one aspect of the present invention, the impact absorber is configured to include a central portion and a pair of side portions, and when a force directed toward the inside of the helmet body is applied to the outer surface of the upper wall portion of the helmet body, the central portion deforms to mitigate the force applied to the upper wall portion.

[0014] In a protective helmet according to one aspect of the present invention, the impact absorber is configured to include a honeycomb structure member, and the impact absorber is arranged so that the extension direction of the central axis of the regular hexagonal prism-shaped space of the honeycomb structure member is in a predetermined direction relative to the portion of the lower wall where the impact absorber is provided or the portion of the upper wall where the impact absorber is provided.

[0015] In a protective helmet according to one aspect of the present invention, the impact absorbing body is configured to include a first member and a second member, and when a force directed toward the inside of the helmet body is applied to the outer surface of the upper wall portion of the helmet body, the engagement state between the first member and the second member changes, thereby alleviating the force applied to the upper wall portion.

[0016] The helmet body according to one aspect of the present invention is a helmet body for a protective helmet, in which the upper and middle sections, which combine the upper and middle sections, have a double structure with a thin upper wall section and a thin lower wall section, thereby forming a space in the upper and middle sections, and is configured with a helmet body main body and an outer, the helmet body main body being integrated with the lower section of the helmet and the lower wall section in a shape that combines them, the outer being configured as a separate body from the helmet body main body, and the outer being installed on the helmet body main body so that the outer forms the upper wall section.

[0017] The helmet body according to one aspect of the present invention is a helmet body for a protective helmet, in which the upper and middle sections, which combine the upper and middle sections, have a double structure with a thin upper wall section and a thin lower wall section, thereby forming a space in the upper and middle sections, and is configured with a helmet body main body and an inner liner, and the helmet body main body is integrated with the lower section of the helmet and the upper wall section in a shape that combines them, and the inner liner is configured as a separate body from the helmet body main body, and is installed on the helmet body main body so that the inner liner forms the lower wall section.

[0018] The cap body according to one aspect of the present invention is a cap body having a cushioning material provided on the lower wall portion, which comes into contact with the wearer's head when the wearer puts on the protective cap.

[0019] A shock absorber according to one aspect of the present invention is a shock absorber that is installed and used within the space of an upper / middle section of a shell in which the upper / middle section, which is the combination of the upper section and the middle section, has a double structure made up of a thin upper wall section and a thin lower wall section, thereby forming a space in the upper / middle section, and is configured to include an inner cylindrical section, an outer cylindrical section located outside this inner cylindrical section, and the inner cylindrical section, and is configured so that when a force directed toward the inside of the shell is applied to the outer surface of the upper wall section of the shell, the inner cylindrical section deforms to alleviate the force applied to the upper wall section.

[0020] The shock absorber according to one aspect of the present invention is a shock absorber that is installed and used within the space of an upper / middle section of a cap body in which the upper / middle section, which combines the upper and middle sections, has a double structure made up of a thin upper wall section and a thin lower wall section, thereby forming a space in the upper / middle section.The shock absorber is configured to include a central section and a pair of side sections, and is configured so that when a force directed toward the inside of the cap body is applied to the outer surface of the upper wall section of the cap body, the central section deforms to alleviate the force applied to the upper wall section.

[0021] The shock absorber according to one aspect of the present invention is a shock absorber that is installed and used within the space of the upper and middle sections of a cap body in which the upper and middle sections, combining the upper and middle sections, have a double structure consisting of a thin upper wall section and a thin lower wall section, thereby forming a space in the upper and middle sections, and is configured with honeycomb structure members, and is installed so that the extension direction of the central axis of the regular hexagonal column-shaped space of the honeycomb structure member is in a predetermined direction relative to the sections of the lower wall section and upper wall section where the shock absorber is installed.

[0022] The shock absorber according to one aspect of the present invention is a shock absorber that is installed and used within the space of an upper / middle section of a cap body in which the upper / middle section, which combines the upper and middle sections, has a double structure made up of a thin upper wall section and a thin lower wall section, thereby forming a space in the upper / middle section.The shock absorber is configured to include a first member and a second member, and when a force directed toward the inside of the cap body is applied to the outer surface of the upper wall section of the cap body, the engagement state between the first member and the second member changes, thereby mitigating the force applied to the upper wall section. [Effects of the Invention]

[0023] The present invention has the effect of providing a protective cap that is lightweight yet can withstand impact forces and protect the wearer's head, a cap body that constitutes the protective cap, and an impact absorber that constitutes the protective cap. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a view of a protective cap according to a first embodiment of the present invention, viewed obliquely from above. [Figure 2] 1 is a view of a protective cap according to a first embodiment of the present invention, viewed obliquely from below. [Figure 3] 2 is a view showing a state in which a cover (upper wall portion) is removed from the protective cap shown in FIG. 1. FIG. [Figure 4] 4 is a view showing a state in which the shock absorbing body is removed from the protective cap shown in FIG. 3. FIG. [Figure 5] 5 is a view showing a state in which the protective cap body is removed from the protective cap shown in FIG. 4. FIG. [Figure 6] 1 is a view of a cover (upper wall portion) of a protective cap according to a first embodiment of the present invention, viewed obliquely from below. [Figure 7] FIG. 7 is a cross-sectional view taken along the line VII-VII in FIG. [Figure 8] 1 is a view of a shock absorber (a shock absorber installed at the top of the protective cap) of a first embodiment of the present invention, viewed obliquely from above. [Figure 9] 1 is a view of a shock absorber (a shock absorber installed at the top of the protective cap) of a first embodiment of the present invention, viewed obliquely from below. [Figure 10] 9 is a cross-sectional view of the section XX in FIG. 8. [Figure 11] 3 is a diagram showing an arrangement of ribs in a shock absorber (a shock absorber installed at the top of the protective cap) of the protective cap according to the first embodiment of the present invention. FIG. [Figure 12] FIG. 12 is a cross-sectional view taken along the line XII-XII in FIG. [Figure 13] 1 is a side view of a shock absorber (a shock absorber installed at a location other than the top of the protective cap) of a protective cap according to a first embodiment of the present invention. [Figure 14] 1 is a cross-sectional view showing a state in which a wearer wears a protective cap according to a first embodiment of the present invention. [Figure 15] 3A and 3B are diagrams showing deformation of the cover and the shock absorbing body when a force is applied to the protective cap according to the first embodiment of the present invention while the protective cap is worn by a wearer. [Figure 16] FIG. 15 is a view corresponding to FIG. 14, showing a protective cap in which a shock absorbing body is supported by a cover (upper wall portion). [Figure 17] FIG. 16 is a view corresponding to FIG. 15 and shows a deformation of a protective cap according to a comparative example. [Figure 18] FIG. 16 is a view corresponding to FIG. 15 and shows a deformation of a protective cap according to a comparative example. [Figure 19] FIG. 16 is a view corresponding to FIG. 15 and shows a deformation of a protective cap according to a comparative example. [Figure 20] FIG. 16 is a view corresponding to FIG. 15 and shows a deformation of a protective cap according to a comparative example. [Figure 21] FIG. 16 is a view corresponding to FIG. 15 and shows a deformation of a protective cap according to a comparative example. [Figure 22] FIG. 16 is a view corresponding to FIG. 15 and shows a deformation of a protective cap according to a comparative example. [Figure 23] FIG. 10 is a view of a protective cap according to a second embodiment of the present invention, viewed obliquely from below. [Figure 24] FIG. 10 is a view of a protective cap according to a second embodiment of the present invention, with the cover (upper wall portion) removed, viewed obliquely from above. [Figure 25] 25 is a diagram showing the protective cap shown in FIG. 24 with the shock absorbing body removed. FIG. [Figure 26] 26 is a diagram showing the state in which the protective cap body is removed from the protective cap shown in FIG. 25. FIG. [Figure 27] FIG. 10 is a view of a shock absorber (a shock absorber installed at the top of the protective cap) of a second embodiment of the present invention, viewed obliquely from above. [Figure 28] FIG. 10 is a view of a shock absorber (a shock absorber installed at the top of the protective cap) of a second embodiment of the present invention, viewed obliquely from below. [Figure 29] 29 is a view taken along the arrow XXIX in FIG. 27. [Figure 30] 28 is a view taken along the arrow XXX in FIG. 27. [Figure 31] FIG. 10 is a side view of a shock absorber of a protective cap according to a second embodiment of the present invention (a shock absorber installed at a location other than the top of the protective cap). [Figure 32] FIG. 10 is a view of a protective cap according to a third embodiment of the present invention, viewed obliquely from above. [Figure 33] 33 is a diagram showing the protective cap shown in FIG. 32 with the cap body removed. FIG. [Figure 34] FIG. 34 is a diagram showing the state in which the shock absorbing body is removed from the protective cap shown in FIG. 33. [Figure 35] 35 is a view showing the protective cap shown in FIG. 34 with the inner liner (lower wall portion) removed. FIG. [Figure 36] FIG. 10 is a view of a protective cap according to a third embodiment of the present invention, viewed obliquely from below. [Figure 37] FIG. 10 is a perspective view of a shock absorber (shock absorber installed on the left and right sides of the protective cap) of a third embodiment of the present invention. [Figure 38] FIG. 10 is a view of the inner liner (lower wall portion) of a protective cap according to a third embodiment of the present invention, viewed obliquely from below. [Figure 39] 39 is a view taken along the arrow XXXIX in FIG. 38. [Figure 40] 39 is a view taken along the arrow XL in FIG. 38. [Figure 41] FIG. 39 is a view taken along the arrow X1 in FIG. 38. [Figure 42] 10A and 10B are diagrams showing deformation of the cover and the shock absorbing body when a force is applied to the protective cap according to the third embodiment of the present invention while the protective cap is being worn by a wearer. [Figure 43] FIG. 10 is a perspective view of a shock absorber according to a first modified example. [Figure 44] FIG. 44 is a view taken along arrow XLIV in FIG. [Figure 45] FIG. 10 is a perspective view of a shock absorber according to a second modified example. [Figure 46] FIG. 10 is a perspective view of a shock absorber according to a third modified example. [Figure 47] FIG. 47 is a diagram showing a state in which the first framed honeycomb body has been removed from FIG. 46. [Figure 48] FIG. 47 is a diagram showing a state in which the second framed honeycomb body has been removed from FIG. 46. [Figure 49] FIG. 47 is a perspective view showing a state in which the third framed honeycomb body has been removed from FIG. 46, showing the outer frame. [Figure 50] FIG. 47 is a view taken along the arrow L in FIG. 46. [Figure 51] 51 is a view taken along the arrow LI in FIG. 50. [Figure 52] FIG. 10 is a perspective view of a shock absorber according to a fourth modified example. [Figure 53] FIG. 53 is a diagram showing a state in which the outer frame is removed from the shock absorber shown in FIG. 52. [Figure 54]FIG. 53 is a view taken along the arrow LIV in FIG. 52. [Figure 55] 53 is a view of the LV arrow in FIG. 52. [Figure 56] FIG. 10 is a plan view of a shock absorber according to a fifth modified example. [Figure 57] FIG. 10 is a perspective view showing a state in which the outer frame is removed from the shock absorber according to the fifth modified example. [Figure 58] FIG. 10 is a perspective view of a shock absorber according to a sixth modified example. [Figure 59] FIG. 59 is a diagram showing a state in which the outer frame is removed from the shock absorber shown in FIG. 58. [Figure 60] 59 is a view taken along the arrow LX in FIG. 58. [Figure 61] FIG. 10 is a perspective view of a shock absorber according to a seventh modified example. [Figure 62] FIG. 13 is a perspective view of a first member of a shock absorber according to a seventh modified example. [Figure 63] FIG. 13 is a perspective view of a second member of a shock absorber according to a seventh modified example. [Figure 64] FIG. 10 is a diagram showing a cross section of a shock absorber according to a seventh modified example. DETAILED DESCRIPTION OF THE INVENTION

[0025] [First embodiment] The protective helmet 1 according to the first embodiment of the present invention is used, for example, as an industrial helmet. Industrial helmets are classified into three types: "for flying / falling objects" that protect against danger from flying / falling objects, "for fall protection" that protect against danger from falls, and "for electricity" that protect against danger from electricity.

[0026] Here, for ease of explanation, a predetermined direction in the protective cap 1 is referred to as the front-to-back direction, a predetermined direction perpendicular to the front-to-back direction is referred to as the left-to-right direction, and a direction perpendicular to the front-to-back direction and the left-to-right direction is referred to as the up-down direction.

[0027] As shown in Figures 1 to 4, 6 and 7, the protective helmet 1 is configured to include a helmet body 3 and a plurality of impact absorbers (impact force absorbers) 5. The helmet body 3 has an upper / middle section 7 that has a double structure consisting of a thin upper wall section (outer wall section) 9 and a thin lower wall section (inner wall section) 11. The upper / middle section 7 is a section that combines an upper section (top section and area surrounding the top section) 13 and a middle section 15.

[0028] The upper and middle portions 7 have a double structure, so that a space (a spherical crown-shaped space with a recess) 17 is formed in the upper and middle portions 7 .

[0029] As shown in Figure 7, the cap body 3 is divided into an upper region 13, a middle region 15, and a lower region 19 in the vertical direction. The upper region 13, the middle region 15, and the lower region 19 are arranged in the order of upper region 13, middle region 15, and lower region 19 from the top of the cap body 3 toward the top and bottom. The dimensional values ​​of the upper region 13, the middle region 15, and the lower region 19 in the vertical direction are, for example, approximately equal to one another. In other words, the dimensional value of the space (upper-middle region space) 17 between the upper and middle regions 7 in the vertical direction is, for example, about 2 / 3 of the dimensional value of the cap body 3 in the vertical direction.

[0030] The cap body main body 21, which is the portion of the cap body 3 excluding the lower wall portion 11 or the upper wall portion 9, is formed in a bowl shape. The bowl-shaped cap body main body 21 can also be said to be formed in a roughly hemispherical shell shape. Because the cap body main body 21 is formed in a hemispherical shell shape, an annular opening 23 (a roughly circular edge portion) is formed at the lower end of the cap body main body 21.

[0031] A hemispherical shell is one of the two solid shapes obtained when a spherical shell-like solid formed by removing a second sphere of a predetermined radius from a first sphere of a predetermined radius is divided by a predetermined plane. The radius of the second sphere is slightly smaller than the radius of the first sphere, and the centers of the first and second spheres are coincident. The predetermined plane includes the centers of the first and second spheres. The thickness of the bowl-shaped cap is the difference between the radius of the first and second spheres.

[0032] Furthermore, the cap body 21 has an appropriate shape according to the shape of a person's head. That is, the cap body 21 is not formed in the shape of a perfect hemispherical shell, but has a hemispherical shell shape that is close to the shape of a hemispherical shell.

[0033] The upper wall portion 9 and the lower wall portion 11 are also formed in a bowl shape. However, the value of the radius of curvature of the lower wall portion 11 is larger than the value of the radius of curvature of the upper wall portion 9, and the value of the dimension of the lower wall portion 11 in the vertical direction is smaller than the value of the dimension of the upper wall portion 9 in the vertical direction.

[0034] The cap body 3 is configured with a degree of rigidity that allows it to be regarded as a generally rigid body. That is, the cap body 3 has a degree of rigidity that allows it to be regarded as a rigid body even when a force of the same magnitude as that exerted by a human finger or a human arm is applied to the cap body 3 with a bare hand.

[0035] The shock absorber 5 is configured as a separate body from, for example, the cap body 3. The shock absorber 5 is supported by at least one of the upper wall portion 9 and the lower wall portion 11. For example, the shock absorber 5 is supported by the lower wall portion 11. Note that, as shown in FIG. 16, the shock absorber 5 may be supported by the upper wall portion 9, or may be supported by both the upper wall portion 9 and the lower wall portion 11. The multiple shock absorbers 5 (5A, 5B, 5C, 5D, 5E) are provided spaced apart from one another in a space 17 in the upper and middle portions.

[0036] As described above, the upper / middle space 17 is formed in the shape of a spherical crown with a recess. A spherical crown with a recess is a shape in which the circular plane of the spherical crown is recessed toward the center of the spherical crown, and this recessed curved surface (concave curved surface) is formed by a part of a sphere. In other words, a spherical crown with a recess is formed by two curved surfaces: a convex curved surface (a curved surface formed by a part of a sphere) and a concave curved surface. The radius of the convex curved surface is smaller than the radius of the concave curved surface.

[0037] The spherical crown with a recess will be further explained. A first bow and a second bow are drawn on a single plane. However, the chords of the first bow and the second bow are aligned, and the arc radius of the second bow is greater than the arc radius of the first bow. When the second bow is removed from the first bow, a crescent-shaped figure remains on the single plane. This crescent-shaped figure is then rotated 180 degrees around the center line of the crescent-shaped figure. The three-dimensional shape represented by the trajectory of the crescent-shaped figure becomes a spherical crown with a recess. Note that the center line of the crescent-shaped figure is a straight line on the single plane, which is the perpendicular bisector of the chords of the first bow and the second bow.

[0038] A plurality of (for example, five) shock absorbers 5 are provided to absorb forces (for example, impact forces) applied to the cap body 3 (see FIG. 3, etc.). Impact forces include those generated when falling and those generated when flying or falling. Between the plurality of shock absorbers 5, spaces 25 (spaces containing only air) where no shock absorbers or the like are present are formed.

[0039] It is assumed that a wearer is wearing the protective cap 1 with the top of the cap body 3 facing up and the opening 23 of the cap body 3 facing down. In this assumed state, when a force from the top of the cap body 3 is applied to the top of the cap body 3 in a downward direction, the shock absorber 5 is provided to minimize the value of the force applied to the wearer's head.

[0040] In addition, in the above-mentioned assumed state, when a force from diagonally above to diagonally below the cap body 3 is applied to the diagonally front part, diagonally rear part, diagonally left part or diagonally right part of the cap body 3, a shock absorbing body 5 is provided to minimize the value of the force applied to the wearer's head. The shock absorbing body 5 is pressed by the upper wall part 9 and deforms itself to absorb the impact force.

[0041] Each of the plurality of shock absorbers 5 is adapted to absorb each of the forces in the five directions described above. In other words, each of the plurality of shock absorbers 5 is adapted to share the role of absorbing forces in the five directions.

[0042] For example, the first shock absorber 5A provided at the top of the cap body 3 is designed to absorb a force acting from the top to the bottom of the cap body 3 on the top of the cap body 3. The second shock absorber 5B provided diagonally in front is designed to absorb a force acting on the diagonally front part of the cap body 3. The third shock absorber 5C provided diagonally in the rear is designed to absorb a force acting on the diagonally rear part of the cap body 3. The fourth shock absorber 5D provided diagonally to the left is designed to absorb a force acting on the diagonally left part of the cap body 3. The fifth shock absorber 5E provided diagonally to the right is designed to absorb a force acting on the diagonally right part of the cap body.

[0043] The cap body 3 shown in Fig. 1, Fig. 7, etc. will be further described. The cap body 3 is configured to include a cap body main body 21 and an outer (cover) 9. As shown in Fig. 4, etc., the cap body main body 21 is integrated (for example, integrally molded) with a shape that combines the lower portion 19 of the cap body 3 and the lower wall portion 11 of the cap body 3. The outer 9 (see Fig. 6) is configured as a separate body from the cap body main body 21. Furthermore, by installing the outer 9 on the cap body main body 21, the outer 9 forms the upper wall portion 9. In the cap body 3 (cap body main body 21) on which the outer 9 is installed, the portion of the cap body main body 21 that faces the outer 9 forms the lower wall portion 11.

[0044] In the protective cap 1 shown in Fig. 1 etc., the shock absorbing body 5 is provided integrally with the cap body main body 21 (lower wall portion 11) as shown in Fig. 3, Fig. 7, and Fig. 14. In addition, in the protective cap 1 shown in Fig. 1 etc., a small gap 27 is formed between the shock absorbing body 5 and the cover (upper wall portion) 9 as shown in Fig. 7 and Fig. 14. As mentioned above, the shock absorbing body 5 may be provided integrally with the cover (upper wall portion) 9 as shown in Fig. 16, and a small gap 27 may be formed between the shock absorbing body 5 and the lower wall portion 11 of the cap body main body 21.

[0045] 2, 5, 14, etc., the protective cap 1 is provided with a cushioning material (head pad) 29. The cushioning material 29 is provided integrally with the lower wall portion 11. More specifically, it is provided on the lower surface of the lower wall portion 11 (the surface opposite to the upper wall portion 9). The cushioning material 29 is designed to come into direct contact with the wearer's head when the wearer puts on the protective cap 1. Furthermore, when a standing wearer puts on the protective cap 1, almost the entire weight of the protective cap 1 is borne by the wearer's head via the cushioning material 29.

[0046] Here, the shock absorber 5 will be described in detail. First, the shock absorber 5A will be described. As shown in FIGS. 8 to 12, the shock absorber 5A is configured to include an inner cylindrical portion 31, an outer cylindrical portion 33, and a connecting portion 35. The outer cylindrical portion 33 is located outside the inner cylindrical portion 31, surrounding the inner cylindrical portion 31 at a distance from the inner cylindrical portion 31 with the inner cylindrical portion 31 positioned inside. The connecting portion 35 is located between the inner cylindrical portion 31 and the outer cylindrical portion 33, and connects the inner cylindrical portion 31 and the outer cylindrical portion 33. The inner cylindrical portion 31 and the outer cylindrical portion 33 are separated from each other. The central axis of the inner cylindrical portion 31, the central axis of the outer cylindrical portion 33, and the central axis of the connecting portion 35 are all aligned with each other.

[0047] Then, a force (downward force) toward the inside (for example, the center) of the cap body 3 is applied to the outer surface (the top of the upper surface) of the upper wall portion 9 of the cap body 3. Then, the inner tubular portion 31 is largely deformed before the connecting portion 35 and the outer tubular portion 33, and comes into contact with the upper wall portion 9, thereby alleviating the force applied to the upper wall portion 9 (see FIG. 15).

[0048] Regarding the alleviation of the force applied to the upper wall portion 9 of the cap body 3, we will further explain the case where the impact absorber 5 is integrally installed on the lower wall portion 11 and a small gap 27 is formed between the impact absorber 5A and the upper wall portion 9.

[0049] In this case, the inner cylindrical portion 31, the outer cylindrical portion 33, and the connecting portion 35 of the impact absorber 5A are in contact with the lower wall portion 11. The impact absorber 5A and the upper wall portion 9 are slightly spaced apart (see FIG. 14, etc.). The central axes of the inner cylindrical portion 31 and the outer cylindrical portion 33 are perpendicular to the portions of the upper wall portion 9 and the lower wall portion 11 where the impact absorber 5A is provided. More specifically, the central axes of the inner cylindrical portion 31 and the outer cylindrical portion 33 are substantially perpendicular to the minute portions of the lower wall portion 11 and the upper wall portion 9 where these central axes intersect.

[0050] A force (downward force) directed toward the inside (for example, the center) of the cap body 3 is applied to the outer surface (the top of the upper surface) of the upper wall portion 9 of the cap body 3. Then, as shown in Figure 15, the upper wall portion 9 of the cap body 3 deforms and comes into contact only with the inner tubular portion 31 of the shock absorber 5A. Then, the inner tubular portion 31 begins to deform.

[0051] When the upper wall portion 9 of the cap body 3 further deforms, the inner tubular portion 31 is pressed by the upper wall portion 9 and deforms accordingly. Due to the deformation of the inner tubular portion 31, the dimension of the inner tubular portion 31 decreases in the direction of extension of the central axis (vertical direction). When the dimension of the inner tubular portion 31 decreases in the direction of extension of the central axis, the outer diameter of the inner tubular portion 31 increases, but the inner tubular portion 31 still remains separated from the outer tubular portion 33. Note that the inner tubular portion 31 may come into contact with the outer tubular portion 33, causing the outer tubular portion 33 to deform slightly when the outer diameter of the inner tubular portion 31 increases.

[0052] When the upper wall portion 9 of the cap body 3 is further deformed, the inner tubular portion 31 is pressed by the upper wall portion 9 and further deformed, and eventually the upper wall portion 9 comes into contact with the outer tubular portion 33. Even in this state, the inner tubular portion 31 is still separated from the outer tubular portion 33.

[0053] As shown in FIG. 10 and other figures, the inner cylindrical portion 31 is formed, for example, in the shape of a bottomed cylinder (cylindrical box) including a side wall portion 37 and a bottom wall portion 39. The bottom wall portion 39 is formed in a disk shape. A small circular hole 41 is provided in the center of the bottom wall portion 39 of the inner cylindrical portion 31. The side wall portion 37 is formed in the shape of a truncated cone with a thickness substantially equal to that of the bottom wall portion 39. The bottom wall portion 39 closes the opening of the side wall portion 37 with a smaller diameter. When the impact absorber 5A is installed in the cap body 3, the bottom wall portion 39 is positioned slightly away from and on the upper wall portion 9 side, and the end of the side wall portion 37 (the end opposite the bottom wall portion 39) is in contact with the lower wall portion 11.

[0054] The outer cylindrical portion 33 is also formed, for example, in a bottomed cylindrical shape (cylindrical box shape) including a side wall portion 43 and a bottom wall portion 45. The bottom wall portion 45 is formed in a disk shape. However, a large circular through-hole is provided in the center of the bottom wall portion 45. The inner diameter of the circular through-hole is larger than the outer diameter of the inner cylindrical portion 31. The side wall portion 43 is formed in a truncated cone shape with a thickness approximately equal to that of the bottom wall portion 45. The bottom wall portion 45 closes the small-diameter opening of the side wall portion 43. When the impact absorber 5A is installed in the cap body 3, the bottom wall portion 45 is located slightly away from the upper wall portion 9 (away from the inner cylindrical portion 31) and is positioned on the upper wall portion 9 side, and the end of the side wall portion 43 (the end opposite the bottom wall portion 45) is in contact with the lower wall portion 11.

[0055] The connecting portion 35 is also formed, for example, in a bottomed cylindrical shape (cylindrical box shape) having a side wall portion 47 and a bottom wall portion 49. The bottom wall portion 49 is formed in a disk shape. However, a large circular through-hole is also provided in the center of the bottom wall portion 49. The inner diameter of the circular through-hole is equal to the outer diameter of the end (the end opposite the bottom wall portion 39) of the side wall portion 37 of the inner cylindrical portion 31. The side wall portion 47 is formed in a cylindrical side surface shape with a thickness approximately equal to that of the bottom wall portion 49. The bottom wall portion 49 closes one opening of the side wall portion 47.

[0056] At the connecting portion 35, the edge of the circular through-hole in the bottom wall portion 49 contacts the end portion (the end portion opposite the bottom wall portion 39) of the side wall portion 37 of the inner cylindrical portion 31. Also, the end portion (the end portion opposite the bottom wall portion 49) of the side wall portion 47 is connected to the edge of the circular through-hole in the bottom wall portion 45 of the outer cylindrical portion 33. When the impact absorber 5A is installed in the cap body 3, the bottom wall portion 49 contacts the lower wall portion 11, and the end portion of the side wall portion 47 (the end portion opposite the bottom wall portion 49) is positioned slightly away from and toward the upper wall portion 9.

[0057] In the impact absorber 5A, the thickness dimension of the wall of the inner cylindrical portion, the thickness dimension of the wall of the bottom cylindrical portion, and the thickness dimension of the wall of the bottom cylindrical portion of the connecting portion are approximately equal to each other.

[0058] In addition, in the direction of extension of the central axis of the inner tubular portion 31, the central axis of the outer tubular portion 33, and the central axis of the connecting portion 35 (the height direction in FIG. 10), the following are arranged in the following order from bottom to top: the end of the outer tubular portion 33 (the end opposite the bottom wall 45 of the outer tubular portion 33), the bottom wall 49 of the connecting portion 35, and the end of the inner tubular portion 31 (the end opposite the bottom wall 39 of the inner tubular portion 31), the bottom wall 45 of the outer tubular portion 33, and the bottom wall 39 of the inner tubular portion 31 are arranged in a row.

[0059] The bottom wall 39 of the inner cylindrical portion 31, the bottom wall 45 of the outer cylindrical portion 33, and the bottom wall 49 of the connecting portion 35 are, more precisely, formed like disc springs rather than disks. The portion of the bottom wall 39 of the inner cylindrical portion 31 on the central axis side (inner side) is located higher (upper side in FIG. 10 ) than the portion on the opposite side (outer side) from the central axis. The portion of the bottom wall 45 of the outer cylindrical portion 33 on the central axis side (inner side) is also located higher (upper side in FIG. 10 ) than the portion on the opposite side (outer side) from the central axis. The portion of the bottom wall 49 of the connecting portion 35 on the central axis side (inner side) is also located higher (upper side in FIG. 10 ) than the portion on the opposite side (outer side) from the central axis.

[0060] The height direction of 5A roughly coincides with the up-down direction of the protective helmet 1. Furthermore, as shown in FIGS. 11 and 12 , the impact absorber 5A is provided with a flat inner rib 51 and a flat outer rib 53. The inner rib 51 is provided between the side wall 37 of the inner tubular portion 31 and the side wall 47 of the connecting portion 35. The inner rib 51 is joined to the side wall 37 of the inner tubular portion 31, the side wall 47 of the connecting portion 35, and the bottom wall 49 of the connecting portion 35. The upper end of the inner rib 51 (the end opposite the bottom wall 49 of the connecting portion 35) is located below the bottom wall 45 of the outer tubular portion 33. The upper end of the inner rib 51 may be located at the same position as the bottom wall 45 of the outer tubular portion 33.

[0061] The outer rib 53 is provided between the side wall 43 of the outer tubular portion 33 and the side wall 47 of the connecting portion 35. The outer rib 53 is joined to the side wall 43 of the outer tubular portion 33, the side wall 47 of the connecting portion 35, and the bottom wall 45 of the outer tubular portion 33. The lower end of the outer rib 53 is located at a line segment connecting the lower end of the side wall 43 of the outer tubular portion 33 and the lower end of the side wall 47 of the connecting portion 35.

[0062] A plurality of (e.g., eight) inner ribs 51 are provided, and a plurality of (e.g., eight) outer ribs 53 are also provided. The plurality of inner ribs 51 are arranged radially at positions where they equally distribute the side wall portion 47 of the inner cylindrical portion 31 and the side wall portion 47 of the connecting portion 35. The plurality of outer ribs 53 are also arranged radially at positions where they equally distribute the side wall portion 43 of the outer cylindrical portion 33 and the side wall portion 47 of the connecting portion 35.

[0063] However, when viewed in the direction of extension of the central axis of the impact absorber 5, as shown in Fig. 11, the positions of the inner ribs 51 and the outer ribs 53 differ in the circumferential direction of the inner cylindrical portion 31 and the outer cylindrical portion 33. For example, one outer rib 53 is disposed in the center between two adjacent inner ribs 51. As can be seen from Fig. 11, the thickness direction of the flat inner rib 51 and the thickness direction of the flat outer rib 53 coincide with the circumferential direction of the inner cylindrical portion 31 and the outer cylindrical portion 33.

[0064] Here, shock absorbers 5B, 5C, 5D, and 5E other than shock absorber 5A will be described with reference to Fig. 13. Shock absorbers 5B, 5C, 5D, and 5E have different height dimensions because space 17 formed between upper wall portion 9 and lower wall portion 11 is formed in a spherical crown shape with a recess.

[0065] That is, the dimensional values ​​of the impact absorbers 5B, 5C, 5D, and 5E in the extension direction (height direction) of the central axes of the inner cylindrical portion 31 and the outer cylindrical portion 33 are large on one side and gradually decrease toward the other side. When the impact absorbers 5B, 5C, 5D, and 5E are installed in the shell 3, the parts with larger dimensional values ​​are located on the top side of the shell 3, and the parts with smaller dimensional values ​​are located on the opening 23 side of the shell 3.

[0066] 2 and 5, the protective cap 1 is provided with a headband 55 and ear and chin straps (not shown). The headband 55 and ear and chin straps are provided on the lower portion 19 of the cap body 3. The headband 55 is also provided with a sweat guard (not shown).

[0067] The cushion material 29 is formed in an annular shape with a predetermined width and thickness. Furthermore, a plurality of (for example, four) notches 57 are provided in the cushion material 29, thereby dividing the cushion material 29 into four sections. The notches 57 are arranged at positions that divide the circumference of the annular shape into four equal sections. Note that the cushion material 29 may be divided into two sections by providing two notches 57 in the cushion material 29, or the cushion material 29 may be formed as a single member by not providing any notches 57 in the cushion material 29.

[0068] A fixing material (not shown), such as double-sided tape, for fixing the cushion material 29 to the lower wall portion 11 is provided on one surface of the cushion material 29 in the thickness direction. The cushion material 29 is fixed to the lower wall portion 11 by this fixing material. The cushion material 29 is installed approximately in the center of the cap body 3 in the left-right and front-rear directions.

[0069] The cover (upper wall portion) 9 is provided with a latching portion 59 (see FIG. 6), and the cap body 21 is provided with a latching portion 61 (see FIG. 3). The latching portion 59 of the cover 9 is latched to the latching portion 61 of the cap body 21, so that the cover 9 is installed integrally with the cap body 21. Note that the latching portion 59 and the latching portion 61 are, for example, of a snap fit type.

[0070] The shock absorbing body 5 is also provided with a latched portion (not shown), and the lower wall portion 11 is also provided with a latching portion (not shown). The latched portion of the shock absorbing body 5 is latched to the latching portion of the lower wall portion 11, so that the shock absorbing body 5 is installed integrally with the lower wall portion 11 (the cap body 21). Note that the latched portion of the shock absorbing body 5 and the latching portion of the lower wall portion 11 are also, for example, of the snap fit type.

[0071] The cap body 21 and the cover 9 are made of synthetic resin such as ABS or polycarbonate, while the shock absorber 5 and the headband 55 are made of synthetic resin such as PE, PP, TPE, etc. The cushioning material 29 is made of elastic synthetic resin such as urethane foam.

[0072] The upper wall portion 9 is provided with a plurality of elongated through-holes 63 (see FIG. 1), and the lower wall portion 11 is also provided with a plurality of through-holes 65 (see FIG. 3). Air passes through the through-holes 63, 65. This passage of air cools the head of a person wearing the protective cap 1.

[0073] Of the multiple through holes 63 in the upper wall portion 9, the first through hole 63 extends long in the left-right direction at the diagonally front left of the cover 9. The second through hole 63 extends long in the left-right direction at the diagonally front right of the cover 9. The third through hole 63 extends long in the left-right direction at the diagonally rear left of the cover 9. The fourth through hole 63 extends long in the left-right direction at the diagonally rear right of the cover 9.

[0074] Of the multiple through holes 65 in the lower wall portion 11, the upper four through holes 65A are formed in a rectangular shape and are arranged in the vertical direction between the impact absorber 5A and the impact absorbers 5B, 5C, 5D, and 5E other than the impact absorber 5A. Note that the positions of the impact absorbers 5B, 5C, 5D, and 5E are substantially aligned with one another in the vertical direction.

[0075] Of the four upper through holes 65A, the first through hole 65A is located diagonally forward to the left, the second through hole 65A is located diagonally forward to the right, the third through hole 65A is located diagonally backward to the left, and the fourth through hole 65A is located diagonally backward to the left.

[0076] The four lower through-holes 65B are also rectangular and are arranged below through-hole 65A at positions corresponding to shock absorbers 5B, 5C, 5D, and 5E in the vertical direction. The first of the four lower through-holes 65B is located diagonally forward and left between shock absorbers 5B and 5D, the second through-hole 65B is located diagonally forward and right between shock absorbers 5B and 5E, the third through-hole 65B is located diagonally rear and left between shock absorbers 5C and 5D, and the fourth through-hole 65B is located diagonally rear and right between shock absorbers 5C and 5E.

[0077] Next, with reference to Figure 15, we will explain the behavior of the protective cap 1 when it is placed on a person's head 67 and an impact force is applied to the protective cap 1. Note that reference numeral 69 in Figure 15 denotes a weight. The weight 69 falls toward the protective cap 1 from directly above.

[0078] Fig. 15(a) shows the state before the weight 69 falls. Fig. 15(b) shows the state in which the upper wall portion 9 has been slightly deformed by the fall of the weight 69 and has begun to contact the shock absorber 5. Fig. 15(c) shows the state in which the upper wall portion 9 has been significantly deformed by the fall of the weight 69, and the shock absorber 5 has also been deformed.

[0079] The dimension between the upper wall portion 9 and the lower wall portion 11 shown in FIG. 15(a) is "L4", the dimension between the upper wall portion 9 and the lower wall portion 11 shown in FIG. 15(b) is "L4'", and the dimension between the upper wall portion 9 and the lower wall portion 11 shown in FIG. 15(c) is "L4"". Naturally, L4>L4'>L4". As shown in FIG. 15(c), as the shock absorber 5 deforms, the load (impact force) applied by the weight 69 is dispersed (the energy of the impact force is absorbed by the deformation of the shock absorber 5), and a load f with a reduced value is applied to the human head 67.

[0080] In Figure 15(a), dimension L1 > dimension L3 > dimension L4. Dimension L1 is shown in Figures 17(a) and 18(a), and dimension L3 is shown in Figure 20(a). Dimensions L3 and L4 will be explained in the explanation of Figures 17 and 18.

[0081] Next, the behavior of a protective cap 501 according to a first comparative example will be described with reference to Fig. 17. The protective cap 501 is configured to include a cap body 503 and a hammock 505. Fig. 17(a) shows the state before the weight 69 falls. Fig. 17(b) shows the state in which the cap body 503 is slightly deformed and the hammock 505 is deformed due to the fall of the weight 69 (see reference symbol "H1"). Fig. 17(c) shows the state in which the cap body 503 is deformed due to the fall of the weight 69.

[0082] The dimension between the cap body 503 and the hammock 505 shown in FIG. 17(a) is "L1", the dimension between the cap body 503 and the hammock 505 shown in FIG. 17(b) is "L1'", and the dimension between the cap body 503, the hammock 505 and the upper wall portion 9 shown in FIG. 17(c) is "L1"". Naturally, L1>L1'>L1" holds. As shown in FIGS. 17(b) and 17(c), the cap body 503 and the hammock 505 deform, so that the load applied by the weight 69 is dispersed and a load f is applied to the head 67.

[0083] Next, the behavior of a protective cap 507 according to a second comparative example will be described with reference to FIG. 18. The protective cap 507 is configured to include a cap body 509 and a hammock 511. The cap body 509 and the hammock 511 are rigid bodies that do not deform. FIG. 18(a) shows the state before the weight 69 falls. FIG. 18(b) shows the initial state after the weight 69 falls and hits the cap body 509. In the state shown in FIG. 18(b), the weight 69 is in contact with the cap body 509, but the load caused by the weight 69 falling is not applied to the cap body 509. FIG. 18(c) shows the state after a very short time has passed since the weight 69 fell and hit the cap body 509.

[0084] In the protective cap 507 shown in Fig. 18, the dimension L1 between the cap body 509 and the hammock 511 shown in Fig. 18(a), the dimension L1 shown in Fig. 18(b), and the dimension L1 shown in Fig. 18(c) are all equal to each other. As a result, in the protective cap 507, all of the energy of the impact force caused by the fall of the weight 69 is transmitted directly to the head 67. In other words, a load F is transmitted to the head. Note that the load F is greater than the load f described above.

[0085] Next, the behavior of a protective cap 513 according to a third comparative example will be described with reference to Fig. 19. The protective cap 513 is configured to include a cap body 515 and a hammock 517. Fig. 19(a) shows the state before the weight 69 falls. Fig. 19(b) shows the state in which the cap body 515 is slightly deformed and the hammock 517 is deformed as the weight 69 falls (see reference symbol "H2"). Fig. 19(c) shows the state in which the cap body 515 is deformed as the weight 69 falls and the cap body 515 comes into contact with a person's head 67 via the hammock 517.

[0086] The dimension between the cap body 503 and the hammock 505 shown in FIG. 19(a) is "L2", the dimension between the cap body 503 and the hammock 505 shown in FIG. 19(b) is "L2'", and the dimension between the cap body 503, the hammock 505, and the upper wall portion 9 shown in FIG. 19(c) is "L2" . Naturally, L2 > L2' > L2". Note that L2" = 0. Furthermore, when the dimension L1 shown in FIG. 17(a) is compared with the dimension L2 shown in FIG. 19(a), L1 > L2. As shown in FIG. 17(c), when the weight 69 falls, the cap body 515 is deformed and comes into contact with the head 67 via the hammock 517, and the large load F applied by the weight 69 is applied to the head 67.

[0087] Next, with reference to FIG. 20, the behavior of a protective cap 519 according to a fourth comparative example will be described. The protective cap 519 is configured to include a cap body 521 and a hammock 523. The hammock 523 is provided with a restricting portion 525. FIG. 20(a) shows the state before the weight 69 falls. FIG. 20(b) shows the state in which the cap body 521 is slightly deformed by the fall of the weight 69, the hammock 523 is deformed, and the restricting portion 525 begins to contact the cap body 521. In the state shown in FIG. 20(b), the restricting portion 525 is in contact with the cap body 521, but the load caused by the fall of the weight 69 is not applied to the restricting portion 525. FIG. 20(c) shows the state in which the cap body 521 is deformed by the fall of the weight 69. In the state shown in FIG. 20(c), the load caused by the fall of the weight 69 is applied to the restricting portion 525.

[0088] The dimension between the cap body 521 and the hammock 523 shown in FIG. 20(a) is "L3", the dimension between the cap body 521 and the hammock 523 shown in FIG. 20(b) is "L3'", and the dimension between the cap body 521, the hammock 523, and the upper wall portion 9 shown in FIG. 20(c) is "L3"". Naturally, L3>L3'>L3". Furthermore, when the dimension L1 shown in FIG. 17(a) is compared with the dimension L3 shown in FIG. 20(a), L1>L3. As shown in FIG. 20(c), the cap body 521 and the hammock 523 are deformed, and the deformed cap body 521 abuts against the restricting portion 525, the load applied by the weight 69 is dispersed, and a load f is applied to the head 67.

[0089] Next, the behavior of a protective cap 527 according to a fifth comparative example will be described with reference to FIG. 21. The protective cap 527 is configured to include a cap body 529 and high-density polystyrene foam 531. FIG. 21(a) shows the state before the weight 69 falls. FIG. 21(b) shows the initial state after the weight 69 falls and hits the cap body 529. In the state shown in FIG. 21(b), the weight 69 is in contact with the cap body 529, but the load caused by the fall of the weight 69 is not applied to the cap body 529. FIG. 21(c) shows the state a short time has passed since the weight 69 fell and hit the cap body 529. FIG. 21(c) shows the state in which the cap body 529 and high-density polystyrene foam 531 have been deformed by the fall of the weight 69.

[0090] The dimension between the cap body 529 and the head 67 shown in Figures 21(a) and 21(b) is "L5", and the dimension between the cap body 529 and the head 67 shown in Figure 21(c) is "L5'". Naturally, L5>L5'. As shown in Figure 21(c), the cap body 529 and the high-density polystyrene foam 531 deform, so that the load applied by the weight 69 is dispersed and a load f is applied to the head 67.

[0091] Next, the behavior of a protective cap 533 according to a sixth comparative example will be described with reference to FIG. 22. The protective cap 533 is configured to include a cap body 535, a hammock 537, and high-density polystyrene foam 539. FIG. 22(a) shows the state before the weight 69 falls. FIG. 22(b) shows the state in which the cap body 535 is slightly deformed and the hammock 537 is deformed due to the fall of the weight 69 (see reference symbol "H1"). In the state shown in FIG. 22(b), the high-density polystyrene foam 539 is in contact with the hammock 537, but no load is applied to the high-density polystyrene foam 539. FIG. 19(c) shows the state in which the cap body 535 and the high-density polystyrene foam 539 are deformed due to the fall of the weight 69.

[0092] The dimension between the cap body 535 and the hammock 537 shown in FIG. 22(a) is "L6", the dimension between the cap body 535 and the hammock 537 shown in FIG. 22(b) is "L6'", and the dimension between the cap body 535 and the hammock 537 shown in FIG. 21(c) is "L6"". Naturally, L6>L6'>L6" holds. As shown in FIG. 22(c), when the weight 69 falls, the cap body 535 and the high-density foam polystyrene 539 are deformed, and the load f applied by the weight 69 is applied to the human head 67.

[0093] The protective helmet 1 is configured with a thin-walled helmet body 3 in which a space 17 is formed in an upper / middle section 7 by a thin-walled upper wall section 9 and a thin-walled lower wall section 11, and a plurality of shock absorbers 5 that are supported by the lower wall section 11 and provided in the space 17. The thin thickness of the helmet body 3 allows for a reduction in the amount of material used to manufacture the protective helmet 1. Furthermore, even if the helmet body 3 is made of a synthetic resin such as ABS resin that is not a foam material, the weight of the protective helmet 1 can be reduced. Furthermore, the shock absorbers 5 allow for impact force resistance and protection of the wearer's head.

[0094] Furthermore, through holes 63, 65 (through holes that penetrate the upper and lower wall portions in the thickness direction) are provided in the upper wall portion 9 and the lower wall portion 11. This allows air to flow more easily within the space 17 in the upper and middle portions 7, and this air flows between the impact absorbers 5 that are spaced apart, allowing the wearer's head to be cooled efficiently.

[0095] Furthermore, in the protective cap 1, the cap body 3 is configured to include a cap body main body 21 and a cover 9. The cap body main body 21 is an integrated shape that combines the lower portion 19 of the cap body 3 with the lower wall portion 11. The cover 9 is configured as a separate body from the cap body main body 21, and is attached to the cap body main body 21 to form the upper wall portion 9. This makes it easy to mold the cap body main body 21 and the cover 9. Furthermore, the rigidity of the cap body main body 21 can be easily increased, and by removing the cover 9 from the cap body main body 21, it becomes easier to attach the impact absorbing body 5 to the protective cap 1.

[0096] Furthermore, in the protective cap 1, the shock absorber 5 is installed in the cap body 21, and a gap 27 is formed between the shock absorber 5 and the cover 9. This makes it easy to install the shock absorber 5 in the cap body 21, even if there is some variation in the height dimension of the shock absorber 5 due to individual differences in the shock absorber 5. Furthermore, because the gap 27 is formed, the impact force can first be absorbed by the deformation of the cover 9, making it easier to mitigate the impact force.

[0097] Furthermore, the protective cap 1 is provided with a cushioning material 29 on the lower wall 11 that comes into contact with the wearer's head when the wearer puts on the protective cap 1. This makes it possible to prevent the lower wall 11 from coming into direct contact with the wearer's head when the wearer puts on the protective cap 1 as much as possible, thereby reducing discomfort felt by the wearer wearing the protective cap 1.

[0098] In addition, in the protective helmet 1, the impact absorber 5 is configured to include an inner tubular portion 31 and an outer tubular portion 33 located outside the inner tubular portion 31. When a force toward the inside of the helmet body 3 is applied to the outer surface of the upper wall portion 9 of the helmet body 3, the inner tubular portion 31 deforms to alleviate the force applied to the upper wall portion 9. This allows the impact absorber 5 to absorb impact while being lightweight. Furthermore, because the impact absorber 5 is formed by combining plate-shaped portions, namely the bottom wall portions 39, 45, and 49 and the side wall portions 37, 43, and 47, it can be made even lighter. Furthermore, by appropriately adjusting the arrangement of the ribs 51 and 53, such as the thickness of the ribs 51 and 53 and the number of the ribs 51 and 53, the rigidity of the impact absorber 5 (the degree of impact absorption) can be easily adjusted. This allows the impact absorber 5 to absorb impact while being lightweight.

[0099] In the protective cap 501 according to the comparative example shown in Fig. 17 etc., the hammock 505 is elastic. The shock absorbers 5 are provided on the elastic hammock 505. Then, depending on the degree of deformation of the hammock 505, the shock absorbers 5 may become misaligned with respect to the cap body 3. Therefore, it is necessary to take measures such as increasing the number of shock absorbers 5. In contrast to this, in the protective cap 1, the rigidity of the lower wall portion 11 of the cap body 3 is considerably higher than that of the hammock 505 (high enough to be considered a rigid body), so that the occurrence of the above-mentioned misalignment can be avoided.

[0100] Here, shock absorbers according to modified examples will be described with reference to Figs. 43 to 64. The shock absorbers shown in Figs. 43 to 64 are used in place of shock absorber 5 in the protective cap 1 according to the first embodiment. The shock absorbers shown in Figs. 43 to 64 may also be used in the protective cap 1A according to the second embodiment, which will be described later, and the protective cap 1B according to the third embodiment, which will be described later. Here, a shock absorber equivalent to shock absorber 5A will be described. The shock absorbers shown in Figs. 43 to 64 that correspond to shock absorbers 5B to 5E can also be modified in the same manner as the shock absorber shown in Fig. 15.

[0101] The shock absorber 71 according to the first modification is configured to include a honeycomb structure member 73. The shock absorber 71 is provided such that the extension direction of the central axis of a regular hexagonal prism-shaped space 75 of the honeycomb structure member 73 is in a predetermined direction with respect to the portions of the lower wall portion 11 and the upper wall portion 9 where the shock absorber 71 is provided. The shock absorber 71 shown in FIGS. 43 and 44 is provided such that the extension direction of the central axis of the regular hexagonal prism-shaped space 75 is approximately perpendicular to the surfaces of the portions of the lower wall portion 11 and the upper wall portion 9 where the shock absorber 71 is provided. The central axis of the regular hexagonal prism-shaped space 75 (central axis of the regular hexagonal prism space) is the central axis connecting the center of the bottom surface of the regular hexagonal prism and the center of the top surface of the regular hexagonal prism.

[0102] A more detailed explanation follows. When the shock absorber 71 is installed on the lower wall 11, the central axis of one of the multiple regular hexagonal prism-shaped spaces 75, located at the center of the shock absorber 71, is substantially perpendicular to the tiny portion of the lower wall 11 where this central axis intersects. In other words, the central axis of the regular hexagonal prism space extends in the vertical direction. Furthermore, when the shock absorber 71 is viewed from the side, as shown in Figure 44, the end face in contact with the lower wall 11 is a spherical concave surface, and the end face on the upper wall 9 side is a spherical convex surface.

[0103] The shock absorber 77 according to the second modified example shown in Figure 45 has a configuration in which the honeycomb structure member 73 of the shock absorber 71 according to the first modified example is provided with an outer frame portion 79. The honeycomb structure member 73 is disposed inside the outer frame portion 79, and the honeycomb structure member 73 and the outer frame portion 79 are molded integrally. The outer frame portion 79 is formed in a low cylindrical shape.

[0104] In the extension direction (height direction) of the central axis of the regular hexagonal column space of the honeycomb structure member 73, the position of one end (lower end) of the outer periphery of the honeycomb structure member 73 and the position of one end (lower end) of the outer frame portion 79 coincide with each other. The position of the other end (upper end) of the outer periphery of the honeycomb structure member 73 coincides with the position of the other end (upper end) of the outer frame portion 79. In addition, the outer frame portion 79 is provided with notches 81 for adjusting the rigidity of the shock absorber 77. The notches 81 penetrate the outer frame portion 79 in the extension direction of the generatrix and also penetrate the solid portion of the outer frame portion 79 in the radial direction of the outer frame portion 79. In addition, multiple notches 81 (for example, four) are provided and are arranged at positions that evenly distribute the circumference of the outer frame portion 79.

[0105] A shock absorber 83 according to the third modified example will be described with reference to Figures 46 to 51. The shock absorber 83 uses a plurality (for example, three) of framed honeycomb bodies 85, which are lower versions of the shock absorber 77 according to the second modified example, and is also provided with an outer frame 87. The outer frame 87 is formed in a low cylindrical shape.

[0106] 51, in the extension direction (height direction) of the central axis of the regular hexagonal columnar space, one end (upper end) of the outer frame 87 is located closer to the other end (lower end) than one end (upper end) of the three overlapping framed honeycomb bodies 85. Also, the other end (upper end) of the outer frame 87 is located closer to one end (lower end) than the other ends (upper ends) of the three overlapping framed honeycomb bodies 85.

[0107] The multiple framed honeycomb bodies 85 are installed in the outer frame 87 with their rotation angles staggered so that the regular hexagonal columnar spaces 75 do not overlap each other and so that they fit into the outer frame 87 (see Figure 50). The inner periphery of the outer frame 87 is provided with multiple protrusions 89. The protrusions 89 protrude slightly toward the center of the outer frame 87 and are provided over the entire length of the outer frame 87 in the height direction. The multiple protrusions 89 are arranged at positions that equally distribute the inner periphery of the outer frame 87.

[0108] When the multiple framed honeycomb bodies 85 are placed inside the outer frame 87, as shown in Figure 50, the multiple protrusions 89 of the outer frame 87 fit into the cutouts 91 of each of the multiple framed honeycomb bodies 85. This prevents the multiple framed honeycomb bodies 85 from rotating relative to the outer frame 87.

[0109] A shock absorber 93 according to a fourth modified example will be described with reference to Figures 52 to 55. The shock absorber 93 is configured to include a plurality of (for example, three) honeycomb structure members 95 and an outer frame 97. The outer frame 97 is formed in the shape of a low cylinder.

[0110] In the honeycomb structure member 95, regular hexagonal prism-shaped spaces 75 are arranged as an example. In the shock absorber 93, the extension direction of the central axes of the regular hexagonal prism-shaped spaces 75 is perpendicular to the extension direction (height direction) of the central axis of the outer frame 97. As shown in Figure 54 etc., multiple honeycomb structure members 95 are placed inside the outer frame 97, overlapping each other. As can be seen from Figure 53, when viewed in the extension direction of the central axis of the outer frame 97, the extension directions of the central axes of the regular hexagonal prism-shaped spaces 75 of the three regular hexagonal prism-shaped spaces 75 are different. For example, the extension directions of the central axes of the regular hexagonal prism-shaped spaces 75 of the three honeycomb structure members 95 are shifted by 120°.

[0111] 46, in the direction of extension of the central axis of the outer frame 97 (height direction), one end (upper end) of the outer frame 97 is located closer to the other end (lower end) than one end (upper end) of the three overlapping honeycomb structure members 95. Also, the other end (lower end) of the outer frame 97 is located closer to one end (upper end) than the other end (lower end) of the three overlapping honeycomb structure members 95 (see FIG. 55).

[0112] As in the case of the shock absorber 83, the outer frame 97 is provided with protrusions 99, and the honeycomb structure member 95 is provided with cutouts 101. In the shock absorber 93, the protrusions 99 fit into the cutouts 101 (see FIG. 54).

[0113] A shock absorber 103 according to a fifth modified example will be described with reference to Figures 56 and 57. The shock absorber 103 is configured similarly to the shock absorber 83 shown in Figures 46 to 51, and is configured to include a plurality of framed honeycomb bodies 105 and an outer frame 107. The framed honeycomb bodies 105 are provided with cutouts 111, and the outer frame 107 is provided with protrusions 109. However, in the shock absorber 103, the central axes of the regular hexagonal prism-shaped spaces 75A located at the center of each of the plurality of framed honeycomb bodies 105 are aligned with each other (see Figure 56).

[0114] The shock absorber 113 according to the sixth modified example will be described with reference to Figures 58 to 60. The shock absorber 113 is configured similarly to the shock absorber 83 shown in Figures 46 to 51. However, whereas the shock absorber 83 is configured with three framed honeycomb bodies 85, the shock absorber 113 according to the sixth modified example is configured with two framed honeycomb bodies 85.

[0115] A shock absorber 115 according to a seventh modification will be described with reference to Figs. 61 to 64. Shock absorber 115 is configured to include a first member 117 and a second member 119. When a force toward the inside (for example, the center) of the cap body 3 is applied to the outer surface of the upper wall portion 9 of the cap body 3, the engagement state between first member 117 and second member 119 changes. This change in engagement state is configured to alleviate the force applied to the upper wall portion 9 described above.

[0116] First member 117 is configured to include a highly rigid main body 121 and an elastic portion 123 that protrudes from main body 121 toward second member 119 (downward). When the above-mentioned force is applied, first member 117 moves toward second member 119 (downward), and elastic portion 123 elastically deforms during this movement, thereby absorbing the above-mentioned force. Figures 61 and 64 show the state before the above-mentioned force is applied. It can be said that shock absorber 115 absorbs impact force by adopting a snap-fit ​​method.

[0117] 63 and 64, second member 119 is configured to include a rectangular cylindrical main body 119a and a rectangular annular protrusion 119b. Protrusion 119b is provided at the end of main body 119a on the second member 119 side (upper side), and protrudes slightly toward the center of main body 119a.

[0118] 62 and 64, elastic portion 123 of first member 117 is configured to include arm portion 123a and protruding piece portion 123c provided with inclined surface 123b. Protruding piece portion 123c is provided at the tip of arm portion 123a and protrudes slightly outward.

[0119] Four sets of arm portions 123a etc. are provided, and the four sets of arm portions 123a etc. are arranged on each of the four sides of main body portion 121, which has a rectangular shape when viewed in the height direction.

[0120] 61 and 64, when first member 117 moves downward, inclined surface 123b of protruding piece 123c comes into contact with convex portion 119b of second member 119 and is pushed by convex portion 119b. Then, mainly arm portion 123a bends inward, causing protruding piece 123c to climb over convex portion 119b and become positioned below convex portion 119b. Arm portion 123a is configured to bend, etc., to alleviate the force applied to upper wall portion 9 described above.

[0121] Second Embodiment A protective cap 1A according to the second embodiment will be described with reference to Figures 23 to 31. The protective cap 1A differs from the protective cap 1 according to the first embodiment in the shape of the shock absorber 125 and the shape of the cushioning material 127, but in other respects is configured in almost the same way as the protective cap 1 according to the first embodiment.

[0122] The shock absorber (shock absorber corresponding to the shock absorber 5A) 125 (125A) is configured to include a central portion 129 and a pair of side portions 131, as shown in FIGS.

[0123] Then, suppose that a force is applied to the outer surface of the upper wall portion 9 of the cap body 3 in a direction toward the inside (for example, the center) of the cap body 3. At this time, similar to the case of the impact absorber 5 shown in Figs. 10 and 11, the central portion 129 is configured to deform more significantly before the pair of side portions 131, thereby absorbing the force applied to the upper wall portion 9.

[0124] A predetermined direction in the shock absorber 125A is defined as the vertical direction, the direction perpendicular to this vertical direction is defined as the horizontal direction, and the direction perpendicular to the vertical and horizontal directions is defined as the height direction. When the shock absorber 125A is installed in the cap body 3, the height direction of the shock absorber 125A is the direction from the lower wall portion 11 toward the upper wall portion 9. For example, in the case of the shock absorber 125A installed at the top of the cap body 3, this height direction is the up-down direction.

[0125] When viewed in the height direction, shock absorber 125A has a rectangular shape that is close to a square. Central portion 129 and the pair of side portions 131 are long in the vertical direction of shock absorber 125A. In the horizontal direction of shock absorber 125A, one side portion 131A of the pair of side portions 131, central portion 129, and the other side portion 131B of the pair of side portions 131 are arranged in this order.

[0126] Central portion 129 is configured to include a plate-shaped bottom wall 133 and a pair of plate-shaped side walls 135. When central portion 129 is viewed vertically, as shown in Fig. 30, bottom wall 133 and the pair of side walls of central portion 129 have a shape similar to a figure formed by the upper base, one hypotenuse, and the other hypotenuse of an isosceles trapezoid. Bottom wall 133 of central portion 129 corresponds to the upper base of the isosceles trapezoid, and each of the pair of side walls 135 corresponds to each of the pair of hypotenuses of the isosceles trapezoid.

[0127] Like the central portion 129, the side portion 131 is also configured to include a plate-shaped bottom wall portion 137 and a pair of plate-shaped side walls 139. When the side portion 131 is viewed in the vertical direction, as shown in Figure 30, the bottom wall portion 137 and the pair of side walls 139 of the side portion 131 have a shape similar to that of the central portion 129, formed by the upper base and a pair of oblique sides of an isosceles trapezoid. However, the horizontal dimension of the side portion 131 is smaller than the horizontal dimension of the central portion 129.

[0128] Central portion 129 is divided into multiple portions (e.g., three portions) by multiple notches (e.g., two notches) 141 of a predetermined width. The width direction of notches 141 is the vertical direction of shock absorber 125A. The multiple portions of central portion 129 divided by notches 141 are aligned in the vertical direction of shock absorber 125A. Note that notches 141 may be omitted.

[0129] The shock absorber 125A is also configured with a pair of elongated rectangular plate-shaped connecting portions 143. The central portion 129 and one of the pair of side portions 131, a side portion 131A, are connected by one of the pair of connecting portions 143, a connecting portion 143A. The plate-shaped connecting portion 143A extends slightly in the horizontal direction of the shock absorber 125A and extends long in the vertical direction. The connecting portion 143A connects the end of the central portion 129 on the side portion 131A side and the end of one of the pair of side portions 131 on the central portion 129 side. The connecting portion 143A extends long in the vertical direction of the shock absorber 125A over the entire length between the central portion 129 and the side portion 131A. Similarly, the central portion 129 and the other side portion 131B of the pair of side portions 131 are connected by the other connecting portion 143B.

[0130] 28, the shock absorber 125A is configured with reinforcement portions 145 in the shape of elongated rectangular plates. The number of reinforcement portions 145 provided is the same as the number of cutouts 141. The reinforcement portions 145 are portions where the cutouts 141 are provided, and connect one side wall portion 135 of the central portion 129 to the other side wall portion 135. The reinforcement portions 141 are located at the ends of the side wall portions 135 of the central portion 129 (the ends opposite the bottom wall portion 133) in the height direction of the shock absorber 125A.

[0131] Furthermore, as shown in FIG. 27, the shock absorber 125A is provided with a plurality of ribs 147. The thickness direction of each of the plurality of ribs 147 is the vertical direction of the shock absorber 125A. The plurality of ribs 147 are spaced apart from one another in the vertical direction of the shock absorber 125A, aligned in the vertical direction of the shock absorber 125A, and provided between one side wall 135 of the central region 129 and a side wall 139 (side wall on the central region side) of one lateral region 131A. Similarly, the plurality of ribs 147 are spaced apart from one another in the vertical direction of the shock absorber 125A, aligned in the vertical direction of the shock absorber 125A, and provided between the other side wall 135 of the central region 129 and a side wall 139 (side wall on the central region side) of the other lateral region 131B. This allows the shock absorber 125 to absorb impact force while reducing its weight.

[0132] 28, the shock absorber 125A is provided with a plurality of ribs 149. The thickness direction of each of the plurality of ribs 149 is the vertical direction of the shock absorber 125A. The plurality of ribs 149 are spaced apart from each other in the vertical direction of the shock absorber 125A, aligned in the vertical direction of the shock absorber 125A, and provided between a pair of side wall portions 139 of one side portion 131A of the pair of side portions 131. Similarly, the plurality of ribs 149 are spaced apart from each other in the vertical direction of the shock absorber 125A, aligned in the vertical direction of the shock absorber 125A, and provided between a pair of side wall portions 139 of the other side portion 131B of the pair of side portions 131.

[0133] Furthermore, in the vertical direction, the position of rib 147 is different from the position of rib 149. That is, rib 149 is positioned offset from rib 147. Furthermore, notch 141 and ribs 147 and 149 are provided to adjust the rigidity of impact absorber 125A.

[0134] 29 and 30, one end (upper end) of the shock absorber 125A in the height direction is curved in a convex shape like a part of a sphere, and the other end (lower end) of the shock absorber 125A in the height direction is curved in a concave shape like a part of a sphere.

[0135] When the impact absorber 125A is installed in the cap body 3, the end (lower part) of the central part 129 of the impact absorber 125A is in contact with the lower wall part 11. Furthermore, when the impact absorber 125A is installed in the cap body 3, the connecting part 143, the end (lower end) of the side part 131, and the reinforcing part are in contact with the lower wall part 11.

[0136] Furthermore, similarly to the protective cap 1 according to the first embodiment, when the impact absorber 125A is installed in the cap body 3, the bottom wall portion 133 of the central portion 129 of the impact absorber 125A and the bottom wall portion 137 of the side portion 131 are located on the upper wall portion 9 side. A gap (a gap similar to gap 27 shown in FIG. 7) is formed between the upper wall portion 9 and the bottom wall portion 133 of the central portion 129 of the impact absorber 125A. Furthermore, when the impact absorber 125A is installed in the cap body 3, a gap is formed between the upper wall portion 9 and the bottom wall portion 137 of the side portion 131 of the impact absorber 125A.

[0137] When the shock absorber 125A is installed on the cap body 3 and a force toward the inside of the cap body 3 is applied to the outer surface of the upper wall portion 9, the upper wall portion 9 of the cap body 3 deforms and comes into contact only with the central portion 129 of the shock absorber 125A. Then, the central portion 129 begins to deform.

[0138] When the upper wall portion 9 of the cap body 3 is further deformed, the central portion 129 is pressed by the upper wall portion 9 and deforms, and eventually the upper wall portion 9 comes into contact with the side portions 131. Even in this state, the central portion 129 is still separated from the side portions 131.

[0139] Here, shock absorbers 125B, 125C, 125D, and 125E other than shock absorber 125A will be described with reference to Fig. 31. Shock absorbers 125B, 125C, 125D, and 125E are used in the same way as shock absorbers 5B, 5C, 5D, and 5E. Like shock absorbers 5B to 5E, shock absorbers 125B to 125E have height dimensions that are large on one side and gradually decrease toward the other side.

[0140] 26, the protective cap 1A is provided with a pair of cushion materials 127 in place of the cushion material 29 (see FIG. 5, etc.). The cushion material 127 is formed in the shape of a long, narrow strip with a predetermined thickness and width. The pair of cushion materials 127 are spaced apart from each other in the left-right direction, extend long in the front-rear direction, and are installed on the lower wall portion 11.

[0141] Third Embodiment A protective cap 1B according to the third embodiment will be described with reference to Figures 32 to 42. The protective cap 1B differs from the protective cap 1 according to the first embodiment in the shape of the cap body 3, etc., but is otherwise configured in almost the same way as the protective cap 1 according to the first embodiment.

[0142] That is, the cap body 3 of the protective cap 1B is configured to include a cap body main body 21 and an inner (lower wall portion) 11. The cap body main body 21 is integrated (for example, molded as a single piece) with a shape that combines the lower portion 19 and the upper wall portion 9 of the cap body 3. The inner 11 is configured as a separate body from the cap body main body 21. When the inner 11 is installed in the cap body main body 21, the inner 11 forms the lower wall portion 11. In the cap body 3 with the inner 11 installed, the portion of the cap body main body 21 that faces the inner 11 forms the upper wall portion 9. Note that when the inner 11 has been installed in the cap body main body 21, for example, the cap body main body 21 and the inner 11 form an integrated shape that cannot be detached.

[0143] 32 and other figures, no through holes are provided in the flesh of the cap body 21. This allows the protective cap 1B to be used as an electrical protective cap that protects against electrical hazards.

[0144] The shock absorbers 5A, 5B, and 5C of the protective cap 1B are formed and installed in the same manner as the shock absorbers 5A, 5B, and 5C of the protective cap 1 according to the first embodiment. The shock absorbers 5D and 5E of the protective cap 1B are also installed in the same manner as the shock absorbers 5D and 5E of the protective cap 1 according to the first embodiment. The shock absorbers 5D and 5E of the protective cap 1B are also formed in the same manner as the shock absorbers 5D and 5E of the protective cap 1 according to the first embodiment. As shown in FIGS. 33 and 37, the outer tubular portion 33 and the connecting portion 35 may be omitted from the shock absorbers 5D and 5E.

[0145] The inner 11 is provided with a through-hole 65 similar to the through-hole 65 provided in the lower wall 11 of the protective cap 1 according to the first embodiment. Also, what is indicated by reference numeral 151 in FIG. 35 etc. is a pad plate that comes into contact with the wearer's head. The pad plate 151 is supported by the lower wall 11 at its periphery. In the protective cap 1B, a cushioning material 29 is provided between the lower wall 11 and the padding plate 151. One surface (upper surface) of the cushioning material 29 in the thickness direction comes into contact with the lower wall 11, and the other surface (lower surface) of the cushioning material 29 in the thickness direction comes into contact with the padding plate 151. The protective cap 1 may also be provided with the padding plate 151 as in the protective cap 1B. Alternatively, the padding plate 151 may be eliminated and the cushioning material 29 may be provided in the inner 11.

[0146] Next, with reference to Figure 42, we will explain the behavior of protective cap 1B when it is placed on a person's head 67 and an impact force is applied to protective cap 1B. Figure 42(a) shows the state before weight 69 falls. Figure 42(b) shows the state when upper wall 9 is slightly deformed by the fall of weight 69 and begins to contact shock absorber 5. Figure 42(c) shows the state when upper wall 9 is significantly deformed by the fall of weight 69 and shock absorber 5 is also deformed.

[0147] The dimension between the upper wall portion 9 and the lower wall portion 11 shown in Figure 42(a) is "L4", the dimension between the upper wall portion 9 and the lower wall portion 11 shown in Figure 42(b) is "L4'", and the dimension between the upper wall portion 9 and the lower wall portion 11 shown in Figure 42(c) is "L4"". Naturally, L4 > L4' > L4". As shown in Figure 42(c), as the shock absorber 5 deforms, the load (impact force) applied by the weight 69 is dispersed (the energy of the impact force is absorbed by the deformation of the shock absorber 5), and a load f is applied to the human head 67.

[0148] As shown in Figure 42(a), dimension L1 > dimension L3 > dimension L4. As in the case of Figure 15(a), dimension L1 is shown in Figures 17(a) and 18(a), and dimension L3 is shown in Figure 20(a).

[0149] In the protective cap 1B, the cap body 3 is configured to include a cap body main body 21 and an inner liner 11. The cap body main body 21 is an integrated shape that combines the lower portion 19 of the cap body 3 with the upper wall portion 9. The inner liner 11 is configured as a separate body from the cap body main body 21, and is installed on the cap body main body 21 to form the lower wall portion 11. This makes it easy to mold the cap body main body 21 and the inner liner 11. In addition, the rigidity of the cap body main body 21 can be further increased, and by removing the inner liner 11 from the cap body main body 21, it becomes easier to install the impact absorbing body 5 on the protective cap.

[0150] Although the present embodiment has been described above, the present embodiment is not limited to this, and various modifications are possible within the scope of the gist of the present embodiment. [Explanation of symbols]

[0151] 1, 1A, 1B Hard hat 3. Hat body 5. Shock absorber 7 Upper and middle areas 9 Upper wall (outer) 11 Lower wall (inner) 13 Upper part 15 Middle part 17 Space 19 Lower part 21 Hat body 27 Gap 29, 127 Cushioning material 31 Inner cylindrical part 33 Outer cylindrical part 73, 95 Honeycomb structure members 75 Regular hexagonal prism space 117 First Component 119 Second Component 129 Central part 131 Lateral site

Claims

1. A cap body in which the upper and middle sections, which are the combined upper and middle sections, have a double structure with a thin upper wall section and a thin lower wall section, thereby forming spaces in the upper and middle sections; a plurality of shock absorbers supported by at least one of the upper wall portion and the lower wall portion and spaced apart from one another within the space of the upper and middle portions; A protective helmet having a

2. The cap body is configured to include a cap body main body and an outer layer, 2. The protective cap according to claim 1, wherein the cap body is integral with the lower portion of the cap body and the lower wall portion in a shape that combines the lower portion of the cap body and the lower wall portion, and the outer is configured as a separate body from the cap body, and the outer is attached to the cap body so that the outer forms the upper wall portion.

3. The impact absorbing body is installed on the cap body, 3. The protective cap according to claim 2, wherein a gap is formed between the shock absorber and the outer shell.

4. The cap body is configured to include a cap body main body and an inner, The protective cap according to claim 1, wherein the cap body is integral with the lower portion of the cap body and the upper wall portion in a shape that combines them, and the inner is configured as a separate body from the cap body, and the inner is installed on the cap body so that the inner forms the lower wall portion.

5. The shock absorber is installed in the inner, 5. The protective cap according to claim 4, wherein a gap is formed between the shock absorbing body and the cap body.

6. The protective cap according to any one of claims 1 to 5, further comprising a cushioning material provided on the lower wall portion that comes into contact with the wearer's head when the wearer puts on the protective cap.

7. The shock absorber is configured to include an inner cylindrical portion and an outer cylindrical portion located outside the inner cylindrical portion, The protective cap according to any one of claims 1 to 5, wherein when a force directed inward of the cap body is applied to the outer surface of the upper wall portion of the cap body, the inner cylindrical portion deforms to relieve the force applied to the upper wall portion.

8. The shock absorber is configured to include a central portion and a pair of side portions, The protective cap according to any one of claims 1 to 5, wherein when a force directed inward of the cap body is applied to the outer surface of the upper wall portion of the cap body, the central portion is deformed to relieve the force applied to the upper wall portion.

9. The shock absorber is configured to include a honeycomb structure member, The protective cap according to any one of claims 1 to 5, wherein the shock absorber is provided such that the extension direction of the central axis of the regular hexagonal prism-shaped space of the honeycomb structure member is in a predetermined direction with respect to the portion of the lower wall portion where the shock absorber is provided or the portion of the upper wall portion where the shock absorber is provided.

10. The shock absorber is configured to include a first member and a second member, The protective cap according to any one of claims 1 to 5, wherein when a force toward the inside of the cap body is applied to the outer surface of the upper wall portion of the cap body, the engagement state between the first member and the second member changes, thereby alleviating the force applied to the upper wall portion.

11. A helmet body of a protective helmet, The upper and middle sections, which are the combination of the upper section and the middle section, have a double structure with a thin upper wall section and a thin lower wall section, so that a space is formed in the upper and middle sections, It is configured with a hat body and an outer layer, The cap body is a single piece formed by combining the lower portion of the cap body and the lower wall portion, and the outer is formed separately from the cap body, and the outer is attached to the cap body, thereby forming the upper wall portion.

12. A helmet body of a protective helmet, The upper and middle sections, which are the combination of the upper section and the middle section, have a double structure with a thin upper wall section and a thin lower wall section, so that a space is formed in the upper and middle sections, It is configured with a hat body and an inner, The cap body is a single piece formed by combining the lower portion of the cap body and the upper wall portion, and the inner is formed separately from the cap body, and the inner is installed on the cap body, so that the inner forms the lower wall portion.

13. 13. The cap body according to claim 11, further comprising a cushioning material provided on the lower wall portion, the cushioning material coming into contact with the head of a wearer when the wearer puts on the protective cap.

14. A shock absorber is installed and used in the space of the upper and middle parts of a cap body, in which the upper and middle parts, combined together, have a double structure with a thin upper wall part and a thin lower wall part, thereby forming a space in the upper and middle parts, The device is configured to include an inner cylindrical portion, an outer cylindrical portion located outside the inner cylindrical portion, and the inner cylindrical portion, The shock absorber is configured so that when a force toward the inside of the cap body is applied to the outer surface of the upper wall portion of the cap body, the inner cylindrical portion deforms to alleviate the force applied to the upper wall portion.

15. A shock absorber is installed and used in the space of the upper and middle parts of a cap body, in which the upper and middle parts, combined together, have a double structure with a thin upper wall part and a thin lower wall part, thereby forming a space in the upper and middle parts, It is configured with a central portion and a pair of side portions, The shock absorber is configured such that when a force directed toward the inside of the cap body is applied to the outer surface of the upper wall portion of the cap body, the central portion deforms to alleviate the force applied to the upper wall portion.

16. A shock absorber is installed and used in the space of the upper and middle parts of a cap body, in which the upper and middle parts, combined together, have a double structure with a thin upper wall part and a thin lower wall part, thereby forming a space in the upper and middle parts, It is configured with honeycomb structure members, An impact absorber that is installed so that the extension direction of the central axis of the regular hexagonal columnar space of the honeycomb structure member is in a predetermined direction relative to the portions of the lower wall portion and upper wall portion where the impact absorber is installed.

17. A shock absorber is installed and used in the space of the upper and middle parts of a cap body, in which the upper and middle parts, combined together, have a double structure with a thin upper wall part and a thin lower wall part, thereby forming a space in the upper and middle parts, The device is configured to include a first member and a second member, A shock absorber configured such that, when a force directed toward the inside of the cap body is applied to the outer surface of the upper wall portion of the cap body, the engagement state between the first member and the second member changes, thereby mitigating the force applied to the upper wall portion.

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