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 comprises a plurality of cells 60, 61, 62, 63 and stretchable links 80, 81 that connect the cells to each other. When the links 80, 81 are extended, the helmet transforms into a single flat plate shape. In a dome-shaped usage state, the cells 62, 63 and the links 80 located at a peripheral edge 53 of the helmet 50 are arranged continuously in a headband-like configuration.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 symmetrical. 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, when assembling, 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 that can realize a helmet structure capable of ensuring 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, and includes a plurality of cells arranged vertically and horizontally, and a link having elasticity and connecting the cells to each other. When the link extends, it deforms into one flat plate-like shape, and when in the dome-shaped use state, a plurality of the cells and the link at the peripheral edge of the helmet are arranged continuously in a band shape.

[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 one flat plate-like 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] Further, when the helmet is in the dome-shaped use state, a plurality of cells and links at the peripheral edge of the helmet are arranged continuously in a band shape, so that the helmet can be firmly held in the shape of the dome-shaped use state.

[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 formed in a polygon, and the link is formed of a corrugated sheet having a corrugated cross section and continuously connects the sides of adjacent cells.

[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, and thus it becomes easier to deform the helmet into a dome shape along the outer peripheral shape of the head.

[0013] Further, the link is formed by a corrugated sheet in cross-section and is configured to continuously connect the sides of adjacent cells. Therefore, a large elongation amount of the link can be ensured, making it easier to deform the helmet from a flat storage state to a dome-shaped use state, improving the assembly workability of the helmet into the use state, and further enhancing the strength and rigidity at the peripheral edge of the helmet so that it can be more firmly held in the shape of the dome-shaped use state (the shape-retaining strength of the entire helmet can be further increased).

[0014] The helmet of the third invention is characterized in that, in the second invention, among the links connecting a plurality of the cells, only the links located at the peripheral edge of the helmet have higher shrinkability than other links when in the dome-shaped use state.

[0015] According to the helmet of the third invention, when in the dome-shaped use state, the links located at the peripheral edge of the helmet have higher shrinkability than other links, so that the links are more likely to shrink to their original lengths, and the strength and rigidity at the peripheral edge of the helmet can be further enhanced.

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

[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 approaching or separating a plurality of cells 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 is possible to make it difficult for the jaw strap connecting straps and the jaw strap to become 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. It is formed into the dome shape, and is characterized in that it 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. Furthermore, when the link extends, the flat plate can be formed into a stacked 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 stacked flat plate.

[0023] Then, by releasing the presser from the state of being 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, the overall strength can be provided, and there is no need to join or connect joints or the like.

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

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

[0030] According to the above helmet, impact absorption is provided 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 integrated, by making them integrally formed by, for example, a mold, the helmet can be easily configured.

[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 in that it is provided with a flexible surface 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 surface 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 as a whole or in part, 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 a Helmet) The helmet cited as an embodiment of the present invention includes, as shown in FIG. 1, 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, and the cells arranged at the ends have a shape appropriately cut as end cells 11 (see FIG. 1) so as to form the edge of the dome-shaped 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 is not limited to a corrugated plate as long as it has stretchability. In addition to various springs, it may be composed of rubber, resin, etc. whose materials themselves have stretchability.

[0043] Also, in this embodiment, as shown in FIG. 2, all of the plurality of cells 10, 10' and the 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 as shown in FIG. 1 under normal conditions (when no force is applied).

[0045] More specifically, the connection between cell 10 and link 20 is such that tension is applied at the edge, so that a circumferential inward force acts on the periphery and the central part has a domed 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, as shown in FIG. 2B, it is also possible to make two flat plates formed by further folding a single flat plate.

[0048] 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 specific cells (between links).

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

[0050] On the other hand, by providing the link 20 with elasticity, when not in use, the link can be extended to deform into a flat plate shape. Further, when the link 20 extends, the flat plate can be formed into a flat plate stacked multiple times, such as a two-layer flat plate formed by folding one of the flat plates, and further a four-layer flat plate formed by folding the two-layer flat plate (not shown), by folding the flat plate multiple times.

[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, the helmet can have strength as a whole, and there is no need to join or connect connecting parts 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 impact throughout the helmet by absorbing impact by a plurality of cells 10 (10') and a plurality of links 20 existing throughout the helmet against impact during use, and by absorbing impact by 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 impact absorbing member, in addition to elastomers, an impact absorbing liner made of expanded polystyrene or the like is adopted.

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

[0058] Also, in this embodiment, the cell 10 (10') and the link 20 are integrally formed by resin molding using a mold, but it is not limited thereto. 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 molded using the same material by a mold has been described, but it is not limited thereto. As long as it is integrally molded, 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, it is preferable that the impact 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 impact absorbing member 12 when provided be made of a material that is softer and more elastic than the link 20 or the like.

[0061] Furthermore, a flexible face 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 this embodiment. By providing a flexible face material that covers the entire plurality of cells 10 (10') (the entire helmet or a part thereof), the function corresponding to the rigid 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) Figs. 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 previous 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] Also, in this helmet 50, all of the plurality of cells 60 to 63 and the links 80, 81 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, in this embodiment, it 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 pentagonal 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 extension 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. 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 constituting the helmet 50 are in the state shown in FIG. 3, that is, the side portions along the extending directions of the adjacent extending portions B, C 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 constituting the respective 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 extending 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 (substantially V-shaped in a cross-sectional view) when viewed from the side. Note that the link may be, for example, a substantially U-shaped one having a curved valley-shaped portion on the outer surface side of the helmet, as long as it can integrally connect adjacent cells arranged adjacent to each other vertically and horizontally.

[0073] Also, as shown in FIG. 3, a plurality of end cells 62, 63 are arranged at the tip portions in the extending directions of the respective extending portions B, C. 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 butted against each other.

[0075] Also, an engaging protrusion 66 is provided 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. And 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 corrugated link 81 extends from a predetermined side 64 of the cells 60 located at both circumferential ends and on both sides along the extending direction of each extending portion C. On the other hand, engaged portions 68 are formed on the cells 60, 61 located at both circumferential ends and on both sides along the extending direction of the extending portion B. And 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 end 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 wider to such an extent that both longitudinal ends of the side 64 are excluded, and are in the form of a wide plate with a predetermined width (see FIG. 3). They are configured to connect adjacent sides 64 and 64 of adjacent cells in the width direction with a predetermined width.

[0078] Also, the above-described links 80 and 81 are configured to continuously connect the sides 64 and 64 of adjacent cells in both the vertical direction (the direction from the lower part of the helmet 50 towards the top of the head) and the horizontal direction (the direction orthogonal 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 connecting the sides 64 and 64 of the end cells 62 and 63 arranged so as to surround the outer periphery of the head at the peripheral edge 53 of the helmet 50 has a higher shrinkage than the other links 80 and 81.

[0080] Also, in each of the portions A, B, and C, between the vertex portions 65 and 65 (the corner portions of the polygonal cells) of 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 portions 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 portion A, a plurality of string insertion holes 71 are formed through which a pair of chin strap connecting strings 90 and 90 are inserted and supported in an intersecting state (see FIG. 5). Furthermore, a chin strap 91 is connected and supported to the pair of chin strap connecting strings 90 and 90.

[0083] Also, among the end cells 62 and 63 of the extension part 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 extension part 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 addition, in this embodiment, "integrally formed using the same material by a mold" means that after filling the 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, in the dome-shaped use state, a plurality of cells and links at the peripheral edge end 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 extension part C with the corresponding engaged part 67 of the extension part B from a single flat plate-shaped storage state, connects the adjacent end cells 62, 62 of the extension parts B and C, and connects the link 81 of the extension part B to the corresponding connected part 68 of the extension part C. Thus, as shown in FIG. 4, the helmet 50 is held in the dome-shaped use state.

[0088] Thereby, a plurality of end cells 62, 63 and links 80 at the peripheral edge end 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 with 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 are provided.

[0090] (Operational effects 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 as a whole into a flat plate shape, and can be made into a thin and compact storage shape. Also, 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 a 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 so as to round them around the front and rear parts of the helmet 50 (as an axis), as shown in the middle figure of FIG. 7, the helmet 50 can be deformed into an elongated roll shape, and can be made into a compact and non-bulky form. Therefore, as shown in the right figure of FIG. 7, even in the storage bag 100 with little storage space, the helmet 50 can be surely stored with a margin.

[0092] Furthermore, as shown in FIGS. 4 to 6, when the helmet 50 is in the dome-shaped use state, a plurality of end cells 62, 63 and links 80, 81 at the peripheral edge 53 of the helmet 50 are arranged in a ring shape, so that the helmet 50 can be firmly held in the shape of the dome-shaped use state.

[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] In addition, 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 with 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 easy to densely arrange a plurality of cells, and thus it becomes easy to deform the helmet into a dome shape along the outer peripheral shape of the head.

[0095] Furthermore, the links 80, 81 are formed of corrugated metal sheets having a corrugated cross section and are configured to continuously connect the sides 64, 64 of adjacent cells. Therefore, a large elongation amount of the links 80, 81 can be ensured, making it easy to deform the helmet 50 from a flat storage state to a dome-shaped use state, improving the workability of assembling the helmet into the use state, and further enhancing the strength and rigidity at the peripheral edge portion 53 of the helmet 50 so that it can be more firmly held in the shape of a dome (the shape retention strength of the entire helmet can be further increased).

[0096] In addition, when the links connecting a plurality of cells are configured such that only the link 80 located at the peripheral edge portion 53 of the helmet 50 has higher shrinkability than other links when the helmet 50 is in the dome-shaped use state, the following effects are achieved.

[0097] That is, in the dome-shaped use state, the link 80 located at the peripheral edge portion 53 of the helmet 50 tends to be stretched more easily than other links. However, according to the above aspect, since the link 80 has higher shrinkability than other links, the link 80 can be easily shrunk to its original length, and the strength and rigidity at the peripheral edge portion 53 of the helmet 50 can be further enhanced.

[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 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 air permeability of the helmet 50 can be ensured.

[0100] By the way, in a foldable and deformable helmet, if it has a configuration with a chin strap or the like like a normal helmet, the chin strap or the like often gets out of position and gets 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 straps 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 straps 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 straps 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 straps 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.

Description of Reference Numerals

[0104] 10(10´) ··· cell, 12 ··· shock absorbing member (shock absorbing part), 20 ··· link, 30 ··· jaw strap, 50 ··· helmet, 60, 61, 62, 63 ··· cell, 64 ··· side, 65 ··· apex portion, 69 ··· through portion, 80, 81 ··· link, 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 a link having elasticity and connecting the cells to each other, wherein when the link extends, it deforms into the flat plate shape, and in the dome-shaped use state, a plurality of the cells and the link at the peripheral edge of the helmet are arranged in a continuous ring shape. The helmet is characterized by this.

2. The helmet according to claim 1, wherein the cell is constituted by a polygon, and the link is formed by a corrugated sheet having a corrugated cross-section, and continuously connects the sides of adjacent cells. The helmet is characterized by this.

3. The helmet according to claim 2, wherein the link connecting the plurality of cells is configured such that only the link located at the peripheral edge of the helmet has a higher shrinkage than other links in the dome-shaped use state. The helmet is characterized by this.

4. The helmet according to claim 2, wherein a through portion without the link is formed between the vertex portions of adjacent cells. The helmet is characterized by this.

5. The helmet according to any one of claims 1 to 4, wherein when the helmet is deformed into the 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. The helmet is characterized by this.

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