Helmet

Abstract

To provide a helmet capable of realizing a helmet structure that can ensure both simple assembly and high safety in a foldable structure.SOLUTION: A helmet 50 deformable between a plate-shaped stored state and a dome-shaped usage state comprises a plurality of cells 60, 61, 62, 63 arranged vertically and horizontally, and stretchable links 80, 81 that connect the cells to each other. All of the cells 60, 61, 62, 63 and the links 80, 81 are integrally molded using the same material by means of a mold. The helmet is configured to be deformable into the dome-shaped usage state by contraction of the links 80, 81.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a helmet that can be deformed into a flat storage state and a dome-shaped use state.

Background Art

[0002] Conventionally, as this type of helmet, there is known one in which a substantially hemispherical shell-shaped cap body is divided into a right half cap body and a left half cap body along a center line passing through the center of the top of the head. The two half cap bodies are symmetric. For example, the left half cap body is partitioned into a left central shell occupying a certain range upward from the lower end opening edge, a left upper peripheral shell adjacent thereto, a left front peripheral shell, and a left rear peripheral shell. The central shell and the peripheral shell are continuous with a thin portion having a rotatable hinge structure, and the peripheral shells are separated from each other. The corresponding peripheral shells of the two half cap bodies located on the outer periphery are connected by a connecting portion having a rotatable hinge structure.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in such a conventional helmet, even if it has a two-part folding structure, at the time of assembly, it is necessary to form the shape of the helmet through the hinge structure and connect the connecting portions, which is complicated.

[0005] On the other hand, when a simple assembly structure is adopted, reliable connection and the like cannot be achieved, and there is a risk that the safety required for a helmet cannot be ensured.

[0006] In view of the above circumstances, an object of the present invention is to provide a helmet capable of realizing a helmet structure that can ensure simple assembly and high safety in a folding structure.

Means for Solving the Problem

[0007] The helmet of the first invention is a helmet that can be deformed into a flat storage state and a dome-shaped use state. It includes a plurality of cells arranged vertically and horizontally, and a link having elasticity and connecting the cells to each other. All of the plurality of cells and the link are integrally formed by a mold using the same material so as to be in the flat plate-like storage state. The link is configured to be deformable into the dome-shaped use form by contracting.

[0008] According to the helmet of the first invention, by extending the elastic link and appropriately changing the arrangement of the plurality of cells, the helmet can be deformed into a flat plate shape to obtain a thin and compact storage shape. Also, by contracting the link and appropriately changing the arrangement of the plurality of cells, the helmet can be deformed into a dome shape, and the helmet can be easily assembled into a use state.

[0009] In addition, since all of the plurality of cells and the link constituting the helmet are integrally formed by a mold using the same material, their strength and rigidity can be enhanced.

[0010] Therefore, it is possible to provide a helmet that is compact and easy to store in a bag or the like, and that has simple assembly and high safety.

[0011] The helmet of the second invention is the helmet of the first invention, wherein the cell is constituted by a polygon, and the link is formed by a corrugated sheet having a waveform in a cross-sectional view and connects the sides of the adjacent cells in the width direction with a predetermined width.

[0012] According to the helmet of the second invention, since the cells are polygonal and the sides of adjacent cells are connected by links, it is easier to reduce the gaps between adjacent cells compared to the case where the cells are circular or the like. As a result, it becomes easier to densely arrange a plurality of cells, so that the helmet can be easily deformed into a dome shape along the outer peripheral shape of the head.

[0013] Further, the link is formed by a corrugated sheet having a corrugated cross-section and is configured to connect the sides of adjacent cells with a predetermined width in the width direction. Therefore, a large elongation amount of the link can be ensured, and it is easy to deform the helmet from a flat storage state to a dome-shaped use state, improving the assembly workability of the helmet to the use state, and at the same time, the connection strength between adjacent cells can be improved.

[0014] The helmet of the third invention is characterized in that, in the second invention, in the flat storage state, the link has a valley portion disposed on the outer surface side of the helmet and is formed in a corrugated shape that spreads on the inner surface side of the helmet.

[0015] According to the helmet of the third invention, since the link has the above structure, when the helmet is deformed into a dome-shaped use state, it becomes easier to make the helmet conform to the outer peripheral shape of the head, and the link itself having the above shape can function as an aid for shock mitigation from the outside of the helmet.

[0016] The helmet of the fourth invention is characterized in that, in the second invention, a through portion without the link is provided between the vertex portions of adjacent cells.

[0017] According to the helmet of the fourth invention, since there is a non-linked through portion between the vertex portions of adjacent cells, when deforming from a flat storage state to a dome-shaped use state or from a dome-shaped use state to a flat storage state, when bringing a plurality of cells closer or separating them via a link, it is possible to make it difficult for the vertex portions of adjacent cells to interfere with each other. Therefore, the above deformation operation can be performed smoothly, improving the assembly workability.

[0018] The helmet of the fifth invention is, in any one of the first to fourth inventions, characterized in that when the helmet is deformed into a use state, it is supported in a state of intersecting the link located at the top of the head, and includes a pair of jaw strap connecting straps that form an arch shape along the inner surface of the helmet, and a jaw strap that is connected to and supported by these pair of jaw strap connecting straps.

[0019] According to the helmet of the fifth invention, since the pair of jaw strap connecting portions are supported in a state of intersecting the link located at the top of the head when the helmet is deformed into a use state, when deforming the helmet into a flat shape or a dome shape, it is possible to make it difficult for the pair of jaw strap connecting straps to be displaced with respect to the top of the head, and it becomes possible to make it difficult for the jaw strap connecting straps and the jaw strap to get entangled, facilitating the transition of the helmet to a flat storage state or a dome-shaped use state. Therefore, it is possible to provide a full-fledged helmet including a pair of jaw strap connecting straps and a jaw strap.

[0020] The helmet of the embodiment is a helmet that can be deformed into a flat storage state and a dome-shaped use state, and includes a plurality of cells arranged vertically and horizontally, and a link having elasticity that connects the cells to each other, and is formed into the dome shape, and is deformed into the flat shape by the link extending.

[0021] According to the above helmet, a dome-shaped helmet is formed by a plurality of cells and a link connecting the cells to each other. Thereby, the dome-shaped shape during use of the helmet can be realized.

[0022] On the one hand, by making the link stretchable, when not in use, the link can be extended to be deformed into a flat plate shape. Further, when the link extends, the flat plate can be formed into a flat plate with multiple folded layers, such as a single flat plate in a planar shape, in addition to a two-layer flat plate formed by folding one of them, and further a four-layer flat plate formed by folding the two-layer flat plate, by folding multiple times.

[0023] Then, by releasing the presser from the state deformed into a flat plate shape, it can be easily deformed back into a dome shape by the expansion and contraction of the link.

[0024] Here, since the entire helmet is connected by cells and links, it can have strength as a whole, and there is no need to join or connect connection parts, etc.

[0025] Thus, according to the above helmet, a helmet structure that can ensure simple assembly and high safety in a folding structure can be realized.

[0026] Furthermore, in the helmet of the embodiment, the link is formed by a corrugated plate having a corrugated cross-section between the cells.

[0027] According to the above helmet, by configuring the link with a corrugated plate (corrugated elastic body), a stretchable link connecting the cells can be specifically realized.

[0028] Thus, according to the above helmet, a helmet structure that can ensure simple assembly and high safety in a folding structure can be specifically realized.

[0029] Also, in the helmet of the embodiment, the cell has an impact absorption part on either one or both of the inner surface side and the outer surface side.

[0030] According to the above helmet, impact absorption on the inner surface side or the outer surface side (including both sides) of the cell By providing the part, in addition to the impact absorption by the entire helmet through the cells and links, the impact absorption performance can be further improved.

[0031] Thus, according to the above helmet, it is possible to realize a helmet structure that can ensure simple assembly and higher safety in a folded structure.

[0032] The helmet of the embodiment is characterized in that the cells and the links are integrally formed.

[0033] According to the above helmet, since a plurality of cells and links are connected and form a single entity, the helmet can be easily configured by integrally forming them, for example, by integral molding using a mold.

[0034] Thus, according to the above helmet, it is possible to easily realize a helmet structure that can ensure simple assembly and high safety in a folded structure.

[0035] The helmet of the embodiment is characterized by including a flexible facing material that covers the plurality of cells on either one or both of the outer surface side and the inner surface side.

[0036] According to the above helmet, by providing a flexible facing material that covers the plurality of cells, that is, the entire helmet or a part of the entire helmet, on the outer surface side or the inner surface side (including both sides) of the helmet, it is possible to impart the function corresponding to a hard cap body entirely or partially, and the strength of the entire helmet can be further increased.

[0037] Thus, according to the above helmet, it is possible to realize a helmet structure that can ensure simple assembly and higher safety in a folded structure.

Brief Description of the Drawings

[0038]

Figure 1

Figure 2A

Figure 2B

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0039] (One Embodiment of the Helmet) As shown in FIG. 1, the helmet cited as an embodiment of the present invention includes a plurality of cells 10 and links 20 that connect adjacent cells to each other.

[0040] As shown in FIG. 1, the cell 10 may be hexagonal, or may be square as shown in FIG. 2. Further, in addition to a polygon, it may have a disk shape.

[0041] The cells 10 are arranged vertically and horizontally (in a mesh shape but not at equal intervals) so as to cover the entire surface. However, the cells arranged at the ends have a shape appropriately cut as shown as end cells 11 (see FIG. 1) so as to form the edge of the domed outer shape.

[0042] Link 20 connects cells 10 to each other in a stretchable manner. As shown in FIGS. 1 and 2, link 20 is formed, for example, by a corrugated plate (a corrugated elastic member) with a cross-sectional waveform (also called a waveform when viewed from the side) between cells, but if it has stretchability, it is not limited to a corrugated plate. In addition to various springs, it may be composed of rubber, resin, etc. whose material itself has stretchability.

[0043] Also, in this embodiment, as shown in FIG. 2, all of the plurality of cells 10, 10' and links are integrally formed using the same material by a mold so as to be in a flat plate-like storage state.

[0044] The helmet of this embodiment configured as described above maintains a dome shape normally (when no force is applied), as shown in FIG. 1.

[0045] More specifically, since the connection between cell 10 and link 20 is in a state where tension is applied at the edge, a circumferential inward force acts on the periphery, and the central part rises into a dome shape.

[0046] On the other hand, when the raised dome is pushed down, the link 20 at the edge is widened against the tension applied to the edge, and the links 20 other than the edge are also widened (although not as much as the link 20 at the edge), so that the entire helmet becomes a single flat plate as shown in FIG. 2A.

[0047] Furthermore, as shown in FIG. 2, when cell 10' is square (a square), as shown in FIG. 2B, it is also possible to make two flat plates obtained by further folding a single flat sheet into a stacked flat plate.

[0048] In addition, in the helmet shown in FIG. 2, in addition to the shape of cell 10 being a square cell 10', the chin strap 30 is also provided so as to straddle between specific cells (between links).

[0049] As described in detail above, according to the helmet of the present embodiment, a dome-shaped helmet is formed by a plurality of cells 10 (10') and links 20 that connect the cells 10 (10') to each other. Thereby, the dome-shaped form at the time of using the helmet can be realized.

[0050] On the other hand, by giving the link 20 elasticity, when not in use, by extending the link, it can be deformed into a flat plate shape. Furthermore, when the link 20 extends, the flat plate can be a flat plate folded a plurality of times, such as, in addition to a single flat plate in a planar shape, a two-layer flat plate obtained by folding one of them, and further a four-layer flat plate obtained by folding the two-layer flat plate (not shown).

[0051] Then, by releasing the presser from the state deformed into a flat plate shape, it can be easily deformed back into a dome shape by the expansion and contraction of the link.

[0052] Here, since the entire helmet is connected by the cells 10 (10') and the links 20, it can have strength as a whole, and there is no need to join or connect joints or the like.

[0053] As described above, according to the helmet of the present embodiment, a helmet structure that can ensure simple assembly and high safety in a folding structure can be realized.

[0054] Here, the helmet of the present embodiment can absorb impacts throughout the helmet by absorbing impacts by a plurality of cells 10 (10') and a plurality of links 20 existing throughout the helmet against impacts during use, and by absorbing impacts due to the expansion and contraction of the plurality of links 20.

[0055] Furthermore, in order to improve the impact absorption performance, as shown in FIG. 2A, it is desirable to provide an impact absorption member 12 (the impact absorption part of the present invention) on the inner surface side of the cell 10 (10').

[0056] As the shock-absorbing member, in addition to an elastomer, a shock-absorbing liner made of expanded polystyrene or the like is adopted.

[0057] In the present embodiment, the shock-absorbing member 12 is provided on the inner surface side of the cell 10 (10'), but the present invention is not limited to this, and it may be provided on either one or both of the inner surface side and the outer surface side.

[0058] In the present embodiment, the cell 10 (10') and the link 20 are integrally formed by resin molding using a mold, but the present invention is not limited to this. For example, the molded cell 10 (10') and the link 20 may be joined by axially attaching or heat-welding them.

[0059] In addition, the case where the cell 10 (10') and the link 20 are integrally formed using the same material by a mold has been described, but the present invention is not limited to this. As long as it is an integral molding, injection molding may be performed with the material partially changed by so-called two-color molding or the like.

[0060] For example, in the case of two-color molding, when providing the shock-absorbing member 12 on the inner surface side of the cell 10 (10') which is the part in contact with the human head or the shock-absorbing member 12, it is preferable that the shock-absorbing member 12 be made of a material that is softer and more elastic than the link 20 or the like.

[0061] Furthermore, a flexible surface material that covers the entire helmet or a part thereof may be provided on either one or both of the outer surface side and the inner surface side of the helmet of the present embodiment. By providing a flexible surface material that covers the entire plurality of cells 10 (10') (the entire helmet or a part thereof), the function corresponding to the hard cap body can be provided entirely or partially, and the strength of the entire helmet can be further increased.

[0062] (Other embodiments of the helmet) Figures 4 to 7 show other embodiments of the helmet according to the present invention. Note that the same reference numerals are given to substantially the same parts as those in the above embodiment, and the description thereof is omitted.

[0063] Similar to the helmet 1 of the above embodiment, the helmet 50 according to this embodiment includes a plurality of cells 60, 61, 62, 63 having a polygonal shape and a plurality of links 80, 81 connecting adjacent cells to each other.

[0064] Moreover, all of the plurality of cells 60 to 63 and the links 80, 81 of this helmet 50 are integrally formed using the same material by a mold, and by the shrinkage of the links 80, 81, it is configured to be deformable into a dome-shaped usage form.

[0065] That is, this helmet 50 can be deformed from the flat storage state shown in FIG. 3 to the dome-shaped usage state shown in FIGS. 4 and 6, and can also be deformed from the dome-shaped usage state to the flat storage state. Furthermore, this helmet 50 can also be deformed from the dome-shaped usage state or the flat storage state to a state suitable for storage on the back or the like, as shown in the right figure of FIG. 7, that is, a state rolled up into an elongated roll shape.

[0066] More specifically, the helmet 50 of this embodiment is composed of a plurality of types of cells 60, 61, 62, 63 such as a substantially regular hexagonal shape having 4 to 6 sides 64 and vertex portions 65 (corner portions between adjacent sides 64, 64), a substantially irregular hexagonal shape that is not a regular hexagon but has a hexagonal shape, a substantially irregular pentagonal shape that is not a regular pentagon but has a pentagonal shape, and a substantially rectangular shape that is not a square but has a substantially rectangular shape.

[0067] Also, this helmet 50 is mainly composed of a central portion A that forms the top of the head 51 (see FIG. 6) and its vicinity, and four extending portions B, C that extend forward, backward, left, and right around this central portion A and mainly constitute the front, rear, left, and right portions of the helmet 50, and in the unfolded state, it has a substantially cross shape as a whole.

[0068] That is, this helmet 50 includes a central portion A, a pair of extending portions B, B disposed opposite to the outer periphery of the central portion A, and a pair of extending portions C, C disposed opposite to the outer periphery of the central portion A so as to be orthogonal to the pair of extending portions B, B.

[0069] In addition, the central portion A and the four extending portions B, C that constitute the helmet 50 are in the state shown in FIG. 3, that is, in a state where the side portions along the extending directions of the extending portions B, C adjacent in the circumferential direction of the helmet 50 are separated from each other, and all of the plurality of cells 60 to 63 and the plurality of links 80, 81 that constitute the portions A, B, C are integrally formed by a mold using the same material.

[0070] Also, in the central portion A and the extending portions B, C, the adjacent sides 64, 64 of the adjacent cells are connected by a link 80.

[0071] As shown in FIG. 3, when the helmet 50 is in a flat storage state (which can also be said to be a deployed state), this link 80 has a valley-shaped portion disposed on the outer surface side of the helmet, and is formed in a corrugated shape that expands on the inner surface side of the helmet.

[0072] More specifically, the link 80 of this embodiment has, in the flat storage state shown in FIG. 3, a valley-shaped portion (which can also be said to be a bottom portion) disposed on the outer surface side of the helmet, and a pair of side portions that extend so as to gradually expand from the valley-shaped portion toward the inner surface side of the helmet, and has a corrugated shape that is substantially V-shaped when viewed from the side (substantially V-shaped in cross-sectional view). Note that the link may be, for example, a substantially U-shaped one with a curved valley-shaped portion disposed on the outer surface side of the helmet, as long as it can integrally connect adjacent cells arranged vertically and horizontally.

[0073] Also, as shown in FIG. 3, a plurality of end cells 62, 63 are arranged at the tip portions of the extending portions B, C in the extending direction. The end cells in the extending portions B, C are composed of a pair of end cells 62, 62 having a substantially rectangular shape arranged at both circumferential ends, and one (in the case of the extending portion C) or a plurality (three in the case of the extending portion B) of end cells 63 having a substantially irregular pentagonal shape arranged between the pair of end cells 62, 62.

[0074] Furthermore, the sides 64 located below each of the end cells 62, 63 are at positions where their heights are substantially aligned. Also, a predetermined end cell 62 of the extending portion B and the corresponding end cell 62 of the adjacent extending portion C (the end cells 62 arranged to face each other in the domed use state) form a wide trapezoidal shape when the outer sides 64, 64 are abutted against each other.

[0075] In addition, an engaging protrusion 66 is protruding from the outer side 64 of the end cell 62 in the extending portion C. On the other hand, an engaged portion 67 with which the engaging protrusion 66 engages is formed on the outer side 64 of the end cell 62 in the extending portion B. When the helmet 50 is deformed into a domed shape for use, the engaging protrusion 66 of the extending portion C engages with the engaged portion 67 of the corresponding extending portion B, and the adjacent end cells 62, 62 are connected to each other.

[0076] Furthermore, a wavy link 81 extends from a predetermined side 64 of the cells 60 located at both circumferential ends and both side portions along the extending direction of each of the extending portions C. On the other hand, engaged portions 68 are formed on the cells 60, 61 located at both circumferential ends and both side portions along the extending direction of the extending portion B. When the helmet 50 is deformed into a domed shape for use, the link 81 of the extending portion C engages with the engaged portion 68 of the corresponding extending portion B, and the adjacent cells are connected to each other.

[0077] The above-described links 80 and 81 are wider than the width of the side 64 of each cell, but are wide plates with a predetermined width that are wider than the longitudinal ends of the side 64 (see Fig. 3). They are configured to connect the adjacent sides 64 and 64 of adjacent cells in the width direction with a predetermined width.

[0078] In addition, the above-described links 80 and 81 are also configured to continuously connect the sides 64 and 64 of adjacent cells in the vertical direction (the direction from the lower part of the helmet to the top of the head) and the horizontal direction (the direction perpendicular to the vertical direction and surrounding the outer periphery of the head) of the helmet 50.

[0079] Furthermore, it is preferable that the links connecting a plurality of cells are configured such that only the links located at the peripheral edge 53 of the helmet 50 have higher shrinkage than other links when the helmet 50 is in a dome-shaped use state. In the case of this embodiment, it is preferable that the V-shaped corrugated link 80 that connects the sides 64 and 64 of the end cells 62 and 63 arranged to surround the outer periphery of the head at the peripheral edge 53 of the helmet 50 has a higher shrinkage than other links 80 and 81.

[0080] Also, in each of the parts A, B, and C, between the vertex portions 65 and 65 (the corner portions of the polygonal cells) of the adjacent cells 60 and 60 arranged adjacent to each other, there is a through portion 69 where the link 80 does not exist.

[0081] Furthermore, on the inner surface side (the side facing the head) of each of the cells 60, 61, and 62 constituting each of the parts A, B, and C, circular concave portions 70 are respectively formed.

[0082] Also, in the cell 60 located at the top of the head 51 of the helmet 50 in the central part A, a plurality of string insertion holes 71 are formed through which a pair of jaw strap connecting strings 90 and 90 are inserted and supported in a crossed state (see Fig. 5). Furthermore, a jaw strap 91 is connected and supported by the pair of jaw strap connecting strings 90 and 90.

[0083] Also, among the end cells 62 and 63 of the extending portion C, a pair of string insertion holes 71, 71 through which the jaw string connecting strings 90 are inserted are also formed in a pair of end cells 63, 63 located inside the end cells 62, 62 located at both circumferential ends.

[0084] Furthermore, among the end cells 62 and 63 of the extending portion B, a string insertion hole 73 for inserting the jaw string 91 and the headband 92 is formed in the end cell 62 located at one circumferential end.

[0085] In the present invention, "integrally formed using the same material by a mold" means that after filling a cavity of a mold having a predetermined inner surface shape with a molten synthetic resin material or the like and then demolding, all of the plurality of cells and the plurality of links constituting the helmet are integrally formed.

[0086] Furthermore, in this embodiment, the helmet 50 is deformed into a single flat plate shape as the links 80 and 81 extend, and as shown in FIG. 4, when in the dome-shaped use state, a plurality of cells and links at the peripheral edge portion 53 of the helmet 50 are arranged in a continuous manner in a turban shape.

[0087] That is, as shown in FIG. 3, the helmet 50 engages the engaging protrusion 66 of the extending portion C with the corresponding engaged portion 67 of the extending portion B, connecting the adjacent end cells 62, 62 of the extending portions B and C, and connecting the link 81 of the extending portion B to the corresponding connected portion 68 of the extending portion C, so that the helmet 50 is held in the dome-shaped use state as shown in FIG. 4.

[0088] Thereby, a plurality of end cells 62, 63 and links 80 at the peripheral edge portion 53 of the helmet 50 are arranged continuously along the outer periphery of the head while surrounding the outer periphery of the head like a turban.

[0089] Also, in this embodiment, as shown in FIGS. 4 to 6, when the helmet 50 is deformed into a dome-shaped use state, it is supported in a state of intersecting the cell 60 located at the top of the helmet 50, and a pair of jaw strap connecting straps 90 that form an arch shape along the inner surface of the helmet, a jaw strap 91 that is connected to and supported by these pair of jaw strap connecting straps 90, 90, and a headband 92 that is disposed on the outer periphery of the head and hooked on the back of the head.

[0090] (Function and effect of other embodiments of the helmet) And in this embodiment, by extending the stretchable links 80, 81 and appropriately changing the arrangement of the plurality of cells 60 to 63, as shown in FIG. 3, the helmet 50 can be deformed into a flat plate shape to obtain a thin and compact storage shape. At the same time, by contracting the links 80, 81 and appropriately changing the arrangement of the plurality of cells 60 to 63, the helmet 50 can be deformed into a dome shape, and the helmet 50 can be easily assembled into a use state.

[0091] Also, FIG. 7 shows the state when the helmet 50 is stored in a storage bag 100 such as a bag. That is, from the dome-shaped use state shown in the left figure of FIG. 7, for example, by folding the left and right parts of the helmet 50 around the front and rear parts of the helmet 50 (as an axis) so as to round them, as shown in the middle figure of FIG. 7, the helmet 50 can be deformed into an elongated roll shape to obtain a compact and non-bulky form. Therefore, as shown in the right figure of FIG. 7, even if the storage bag 100 has little storage space, the helmet 50 can be surely stored with a margin.

[0092] Furthermore, since the entire helmet 50, that is, all of the plurality of cells 60 to 63 and the links 80, 81 that constitute the helmet 50 are integrally formed using the same material by a mold, their strength and rigidity can be enhanced.

[0093] Therefore, it is possible to provide a helmet 50 that is compact and easy to store in a bag or the like, and that can be easily assembled and ensures high safety.

[0094] Also, in this embodiment, the cells 60 to 63 are polygonal, and the sides 64, 64 of adjacent cells are connected by links 80, 81. Therefore, for example, compared to the case where the cells are circular or the like, it is easier to reduce the gap between adjacent cells. As a result, it becomes easier to densely arrange the plurality of cells 60 to 63, and thus it becomes easier to deform the helmet 50 into a dome shape along the outer peripheral shape of the head.

[0095] Furthermore, the links 80, 81 are formed of corrugated sheets having a corrugated cross section, and are configured to connect the sides 64, 64 of adjacent cells with a predetermined width in the width direction. Therefore, a large elongation amount of the links 80, 81 can be ensured, making it easier to deform the helmet 50 from a flat storage state to a dome-shaped use state, improving the workability of assembling the helmet 50 into the use state, and improving the connection strength between adjacent cells.

[0096] Also, in this embodiment, the link 80 that connects adjacent cells has a valley portion disposed on the outer surface side of the helmet when the helmet 50 is in the flat storage state, and is formed in a corrugated shape that spreads on the inner surface side of the helmet.

[0097] According to the above aspect, since the link 80 has the above structure, as shown in FIGS. 4 and 6, when the helmet 50 is deformed into the dome-shaped use state, it becomes easier to align the helmet 50 along the outer peripheral shape of the head, and the link 80 having the above shape itself can function as an aid in buffering impacts from outside the helmet.

[0098] Furthermore, in this embodiment, since there is a through portion 69 without links 80, 81 between the vertex portions 65, 65 of adjacent cells, when deforming from the flat storage state to the dome-shaped use state or from the dome-shaped use state to the flat storage state, when bringing a plurality of cells closer or separating them via the links 80, 81, it is possible to make it difficult for the vertex portions 65, 65 of adjacent cells to interfere with each other (it is difficult for the vertex portions 65, 65 to contact or get caught). Therefore, the above-described deformation operation can be performed smoothly, improving the assembly workability of the helmet 50.

[0099] Also, when the helmet 50 is in the dome-shaped use state, since the gap between the vertex portions 65, 65 of adjacent cells is maintained by the through portion 69, the breathability of the helmet 50 can be ensured.

[0100] By the way, in a foldable and deformable helmet, if it is configured to have a chin strap or the like like a normal helmet, the chin strap or the like often gets displaced and entangled with each other during deformation, and it may be difficult to shift to the storage state or the use state. Therefore, it is difficult for a foldable and deformable helmet to have a full-fledged chin strap structure like a normal helmet.

[0101] On the other hand, in this embodiment, since the pair of chin strap connecting strings 90, 90 are supported in a state of intersecting the link 80 located at the top of the head 51 when the helmet 50 is deformed into the use state (see FIG. 5), when deforming the helmet 50 into a flat shape or a dome shape, it is possible to make it difficult for the pair of chin strap connecting strings 90, 90 to be displaced with respect to the top of the head 51. As a result, it is possible to make it difficult for the pair of chin strap connecting strings 90, 90 and the chin strap 91 to get entangled, and it becomes easier to shift the helmet 50 to the flat storage state or the dome-shaped use state.

[0102] Therefore, it is possible to provide a full-fledged helmet 50 including a pair of chin strap connecting strings 90, 90 and a chin strap 91.

[0103] Moreover, the present invention is not limited to the above-described embodiments, and various modified embodiments are possible within the scope of the gist of the present invention, and such embodiments are also included in the scope of the present invention.

Explanation of Reference Numerals

[0104] 10(10´) ··· cell, 12 ··· shock absorber (shock absorbing part), 20 ··· link, 30 ··· jaw strap, 50 ··· helmet, 60, 61, 62, 63 ··· cells, 64 ··· side, 65 ··· vertex part, 69 ··· through-hole part, 80, 81 ··· links, 90 ··· jaw strap connecting strap, 91 ··· jaw strap

Claims

1. A helmet that can be deformed into a flat storage state and a dome-shaped use state, comprising a plurality of cells arranged vertically and horizontally, and links having elasticity and connecting the cells to each other, wherein all of the plurality of cells and the links are integrally formed by a mold using the same material so as to be in the flat storage state, and the dome-shaped use form can be deformed by the contraction of the links. A helmet characterized by that.

2. In the helmet according to Claim 1, the cell is constituted by a polygon, and the link is formed by a corrugated sheet having a corrugated cross section, and connects the sides of adjacent cells in the width direction with a predetermined width. A helmet characterized by that.

3. In the helmet according to Claim 2, in the flat storage state, the link is arranged with a valley portion on the outer surface side of the helmet, and is formed in a corrugated shape that spreads on the inner surface side of the helmet. A helmet characterized by that.

4. In the helmet according to Claim 2, a through portion without the link is formed between the vertex portions of adjacent cells. A helmet characterized by that.

5. In the helmet according to any one of Claims 1 to 4, when the helmet is deformed into a use state, it is supported in a state of intersecting the link located at the top of the head, and a pair of jaw strap connecting straps that form an arch shape along the inner surface of the helmet, and a pair of these jaw strap connecting straps And a jaw strap that is connected and supported. A helmet characterized by that.

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